[Python-checkins] cpython: Issue #20179: Converted the _ssl module to Argument Clinic.

serhiy.storchaka python-checkins at python.org
Sun May 3 15:18:46 CEST 2015


https://hg.python.org/cpython/rev/1eaaf27b3956
changeset:   95869:1eaaf27b3956
user:        Serhiy Storchaka <storchaka at gmail.com>
date:        Sun May 03 16:14:08 2015 +0300
summary:
  Issue #20179: Converted the _ssl module to Argument Clinic.

files:
  Modules/_ssl.c |  1032 +++---
  Modules/_ssl.c |  5604 ++++++-----------------------------
  2 files changed, 1542 insertions(+), 5094 deletions(-)


diff --git a/Modules/_ssl.c b/Modules/_ssl.c
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -221,11 +221,17 @@
 static PyTypeObject PySSLSocket_Type;
 static PyTypeObject PySSLMemoryBIO_Type;
 
-static PyObject *PySSL_SSLwrite(PySSLSocket *self, PyObject *args);
-static PyObject *PySSL_SSLread(PySSLSocket *self, PyObject *args);
+/*[clinic input]
+module _ssl
+class _ssl._SSLContext "PySSLContext *" "&PySSLContext_Type"
+class _ssl._SSLSocket "PySSLSocket *" "&PySSLSocket_Type"
+class _ssl.MemoryBIO "PySSLMemoryBIO *" "&PySSLMemoryBIO_Type"
+[clinic start generated code]*/
+/*[clinic end generated code: output=da39a3ee5e6b4b0d input=7bf7cb832638e2e1]*/
+
+#include "clinic/_ssl.c.h"
+
 static int PySSL_select(PySocketSockObject *s, int writing, _PyTime_t timeout);
-static PyObject *PySSL_peercert(PySSLSocket *self, PyObject *args);
-static PyObject *PySSL_cipher(PySSLSocket *self);
 
 #define PySSLContext_Check(v)   (Py_TYPE(v) == &PySSLContext_Type)
 #define PySSLSocket_Check(v)    (Py_TYPE(v) == &PySSLSocket_Type)
@@ -563,7 +569,13 @@
 
 /* SSL object methods */
 
-static PyObject *PySSL_SSLdo_handshake(PySSLSocket *self)
+/*[clinic input]
+_ssl._SSLSocket.do_handshake
+[clinic start generated code]*/
+
+static PyObject *
+_ssl__SSLSocket_do_handshake_impl(PySSLSocket *self)
+/*[clinic end generated code: output=6c0898a8936548f6 input=d2d737de3df018c8]*/
 {
     int ret;
     int err;
@@ -1303,25 +1315,28 @@
     return retval;
 }
 
+/*[clinic input]
+_ssl._test_decode_cert
+    path: object(converter="PyUnicode_FSConverter")
+    /
+
+[clinic start generated code]*/
+
 static PyObject *
-PySSL_test_decode_certificate (PyObject *mod, PyObject *args) {
-
+_ssl__test_decode_cert_impl(PyModuleDef *module, PyObject *path)
+/*[clinic end generated code: output=679e01db282804e9 input=cdeaaf02d4346628]*/
+{
     PyObject *retval = NULL;
-    PyObject *filename;
     X509 *x=NULL;
     BIO *cert;
 
-    if (!PyArg_ParseTuple(args, "O&:test_decode_certificate",
-                          PyUnicode_FSConverter, &filename))
-        return NULL;
-
     if ((cert=BIO_new(BIO_s_file())) == NULL) {
         PyErr_SetString(PySSLErrorObject,
                         "Can't malloc memory to read file");
         goto fail0;
     }
 
-    if (BIO_read_filename(cert, PyBytes_AsString(filename)) <= 0) {
+    if (BIO_read_filename(cert, PyBytes_AsString(path)) <= 0) {
         PyErr_SetString(PySSLErrorObject,
                         "Can't open file");
         goto fail0;
@@ -1338,20 +1353,33 @@
     X509_free(x);
 
   fail0:
-    Py_DECREF(filename);
+    Py_DECREF(path);
     if (cert != NULL) BIO_free(cert);
     return retval;
 }
 
 
+/*[clinic input]
+_ssl._SSLSocket.peer_certificate
+    der as binary_mode: bool = False
+    /
+
+Returns the certificate for the peer.
+
+If no certificate was provided, returns None.  If a certificate was
+provided, but not validated, returns an empty dictionary.  Otherwise
+returns a dict containing information about the peer certificate.
+
+If the optional argument is True, returns a DER-encoded copy of the
+peer certificate, or None if no certificate was provided.  This will
+return the certificate even if it wasn't validated.
+[clinic start generated code]*/
+
 static PyObject *
-PySSL_peercert(PySSLSocket *self, PyObject *args)
+_ssl__SSLSocket_peer_certificate_impl(PySSLSocket *self, int binary_mode)
+/*[clinic end generated code: output=f0dc3e4d1d818a1d input=8281bd1d193db843]*/
 {
     int verification;
-    int binary_mode = 0;
-
-    if (!PyArg_ParseTuple(args, "|p:peer_certificate", &binary_mode))
-        return NULL;
 
     if (!self->handshake_done) {
         PyErr_SetString(PyExc_ValueError,
@@ -1373,18 +1401,6 @@
     }
 }
 
-PyDoc_STRVAR(PySSL_peercert_doc,
-"peer_certificate([der=False]) -> certificate\n\
-\n\
-Returns the certificate for the peer.  If no certificate was provided,\n\
-returns None.  If a certificate was provided, but not validated, returns\n\
-an empty dictionary.  Otherwise returns a dict containing information\n\
-about the peer certificate.\n\
-\n\
-If the optional argument is True, returns a DER-encoded copy of the\n\
-peer certificate, or None if no certificate was provided.  This will\n\
-return the certificate even if it wasn't validated.");
-
 static PyObject *
 cipher_to_tuple(const SSL_CIPHER *cipher)
 {
@@ -1427,7 +1443,13 @@
     return NULL;
 }
 
-static PyObject *PySSL_shared_ciphers(PySSLSocket *self)
+/*[clinic input]
+_ssl._SSLSocket.shared_ciphers
+[clinic start generated code]*/
+
+static PyObject *
+_ssl__SSLSocket_shared_ciphers_impl(PySSLSocket *self)
+/*[clinic end generated code: output=3d174ead2e42c4fd input=0bfe149da8fe6306]*/
 {
     SSL_SESSION *sess = SSL_get_session(self->ssl);
     STACK_OF(SSL_CIPHER) *ciphers;
@@ -1451,7 +1473,13 @@
     return res;
 }
 
-static PyObject *PySSL_cipher (PySSLSocket *self)
+/*[clinic input]
+_ssl._SSLSocket.cipher
+[clinic start generated code]*/
+
+static PyObject *
+_ssl__SSLSocket_cipher_impl(PySSLSocket *self)
+/*[clinic end generated code: output=376417c16d0e5815 input=548fb0e27243796d]*/
 {
     const SSL_CIPHER *current;
 
@@ -1463,7 +1491,13 @@
     return cipher_to_tuple(current);
 }
 
-static PyObject *PySSL_version(PySSLSocket *self)
+/*[clinic input]
+_ssl._SSLSocket.version
+[clinic start generated code]*/
+
+static PyObject *
+_ssl__SSLSocket_version_impl(PySSLSocket *self)
+/*[clinic end generated code: output=178aed33193b2cdb input=900186a503436fd6]*/
 {
     const char *version;
 
@@ -1476,7 +1510,14 @@
 }
 
 #ifdef OPENSSL_NPN_NEGOTIATED
-static PyObject *PySSL_selected_npn_protocol(PySSLSocket *self) {
+/*[clinic input]
+_ssl._SSLSocket.selected_npn_protocol
+[clinic start generated code]*/
+
+static PyObject *
+_ssl__SSLSocket_selected_npn_protocol_impl(PySSLSocket *self)
+/*[clinic end generated code: output=b91d494cd207ecf6 input=c28fde139204b826]*/
+{
     const unsigned char *out;
     unsigned int outlen;
 
@@ -1490,7 +1531,14 @@
 #endif
 
 #ifdef HAVE_ALPN
-static PyObject *PySSL_selected_alpn_protocol(PySSLSocket *self) {
+/*[clinic input]
+_ssl._SSLSocket.selected_alpn_protocol
+[clinic start generated code]*/
+
+static PyObject *
+_ssl__SSLSocket_selected_alpn_protocol_impl(PySSLSocket *self)
+/*[clinic end generated code: output=ec33688b303d250f input=442de30e35bc2913]*/
+{
     const unsigned char *out;
     unsigned int outlen;
 
@@ -1502,7 +1550,14 @@
 }
 #endif
 
-static PyObject *PySSL_compression(PySSLSocket *self) {
+/*[clinic input]
+_ssl._SSLSocket.compression
+[clinic start generated code]*/
+
+static PyObject *
+_ssl__SSLSocket_compression_impl(PySSLSocket *self)
+/*[clinic end generated code: output=bd16cb1bb4646ae7 input=5d059d0a2bbc32c8]*/
+{
 #ifdef OPENSSL_NO_COMP
     Py_RETURN_NONE;
 #else
@@ -1689,9 +1744,20 @@
     return rc == 0 ? SOCKET_HAS_TIMED_OUT : SOCKET_OPERATION_OK;
 }
 
-static PyObject *PySSL_SSLwrite(PySSLSocket *self, PyObject *args)
+/*[clinic input]
+_ssl._SSLSocket.write
+    b: Py_buffer
+    /
+
+Writes the bytes-like object b into the SSL object.
+
+Returns the number of bytes written.
+[clinic start generated code]*/
+
+static PyObject *
+_ssl__SSLSocket_write_impl(PySSLSocket *self, Py_buffer *b)
+/*[clinic end generated code: output=aa7a6be5527358d8 input=77262d994fe5100a]*/
 {
-    Py_buffer buf;
     int len;
     int sockstate;
     int err;
@@ -1709,12 +1775,7 @@
         Py_INCREF(sock);
     }
 
-    if (!PyArg_ParseTuple(args, "y*:write", &buf)) {
-        Py_XDECREF(sock);
-        return NULL;
-    }
-
-    if (buf.len > INT_MAX) {
+    if (b->len > INT_MAX) {
         PyErr_Format(PyExc_OverflowError,
                      "string longer than %d bytes", INT_MAX);
         goto error;
@@ -1749,7 +1810,7 @@
 
     do {
         PySSL_BEGIN_ALLOW_THREADS
-        len = SSL_write(self->ssl, buf.buf, (int)buf.len);
+        len = SSL_write(self->ssl, b->buf, (int)b->len);
         err = SSL_get_error(self->ssl, len);
         PySSL_END_ALLOW_THREADS
 
@@ -1781,7 +1842,6 @@
     } while (err == SSL_ERROR_WANT_READ || err == SSL_ERROR_WANT_WRITE);
 
     Py_XDECREF(sock);
-    PyBuffer_Release(&buf);
     if (len > 0)
         return PyLong_FromLong(len);
     else
@@ -1789,17 +1849,18 @@
 
 error:
     Py_XDECREF(sock);
-    PyBuffer_Release(&buf);
     return NULL;
 }
 
-PyDoc_STRVAR(PySSL_SSLwrite_doc,
-"write(s) -> len\n\
-\n\
-Writes the string s into the SSL object.  Returns the number\n\
-of bytes written.");
-
-static PyObject *PySSL_SSLpending(PySSLSocket *self)
+/*[clinic input]
+_ssl._SSLSocket.pending
+
+Returns the number of already decrypted bytes available for read, pending on the connection.
+[clinic start generated code]*/
+
+static PyObject *
+_ssl__SSLSocket_pending_impl(PySSLSocket *self)
+/*[clinic end generated code: output=983d9fecdc308a83 input=2b77487d6dfd597f]*/
 {
     int count = 0;
 
@@ -1812,19 +1873,25 @@
         return PyLong_FromLong(count);
 }
 
-PyDoc_STRVAR(PySSL_SSLpending_doc,
-"pending() -> count\n\
-\n\
-Returns the number of already decrypted bytes available for read,\n\
-pending on the connection.\n");
-
-static PyObject *PySSL_SSLread(PySSLSocket *self, PyObject *args)
+/*[clinic input]
+_ssl._SSLSocket.read
+    size as len: int
+    [
+    buffer: Py_buffer(types={'rwbuffer'})
+    ]
+    /
+
+Read up to size bytes from the SSL socket.
+[clinic start generated code]*/
+
+static PyObject *
+_ssl__SSLSocket_read_impl(PySSLSocket *self, int len, int group_right_1,
+                          Py_buffer *buffer)
+/*[clinic end generated code: output=00097776cec2a0af input=4a0bbd2859e817b0]*/
 {
     PyObject *dest = NULL;
-    Py_buffer buf;
     char *mem;
-    int len, count;
-    int buf_passed = 0;
+    int count;
     int sockstate;
     int err;
     int nonblocking;
@@ -1841,23 +1908,17 @@
         Py_INCREF(sock);
     }
 
-    buf.obj = NULL;
-    buf.buf = NULL;
-    if (!PyArg_ParseTuple(args, "i|w*:read", &len, &buf))
-        goto error;
-
-    if ((buf.buf == NULL) && (buf.obj == NULL)) {
+    if (!group_right_1) {
         dest = PyBytes_FromStringAndSize(NULL, len);
         if (dest == NULL)
             goto error;
         mem = PyBytes_AS_STRING(dest);
     }
     else {
-        buf_passed = 1;
-        mem = buf.buf;
-        if (len <= 0 || len > buf.len) {
-            len = (int) buf.len;
-            if (buf.len != len) {
+        mem = buffer->buf;
+        if (len <= 0 || len > buffer->len) {
+            len = (int) buffer->len;
+            if (buffer->len != len) {
                 PyErr_SetString(PyExc_OverflowError,
                                 "maximum length can't fit in a C 'int'");
                 goto error;
@@ -1918,30 +1979,32 @@
 
 done:
     Py_XDECREF(sock);
-    if (!buf_passed) {
+    if (!group_right_1) {
         _PyBytes_Resize(&dest, count);
         return dest;
     }
     else {
-        PyBuffer_Release(&buf);
         return PyLong_FromLong(count);
     }
 
 error:
     Py_XDECREF(sock);
-    if (!buf_passed)
+    if (!group_right_1)
         Py_XDECREF(dest);
-    else
-        PyBuffer_Release(&buf);
     return NULL;
 }
 
-PyDoc_STRVAR(PySSL_SSLread_doc,
-"read([len]) -> string\n\
-\n\
-Read up to len bytes from the SSL socket.");
-
-static PyObject *PySSL_SSLshutdown(PySSLSocket *self)
+/*[clinic input]
+_ssl._SSLSocket.shutdown
+
+Does the SSL shutdown handshake with the remote end.
+
+Returns the underlying socket object.
+[clinic start generated code]*/
+
+static PyObject *
+_ssl__SSLSocket_shutdown_impl(PySSLSocket *self)
+/*[clinic end generated code: output=ca1aa7ed9d25ca42 input=ede2cc1a2ddf0ee4]*/
 {
     int err, ssl_err, sockstate, nonblocking;
     int zeros = 0;
@@ -2044,14 +2107,17 @@
     return NULL;
 }
 
-PyDoc_STRVAR(PySSL_SSLshutdown_doc,
-"shutdown(s) -> socket\n\
-\n\
-Does the SSL shutdown handshake with the remote end, and returns\n\
-the underlying socket object.");
+/*[clinic input]
+_ssl._SSLSocket.tls_unique_cb
+
+Returns the 'tls-unique' channel binding data, as defined by RFC 5929.
+
+If the TLS handshake is not yet complete, None is returned.
+[clinic start generated code]*/
 
 static PyObject *
-PySSL_tls_unique_cb(PySSLSocket *self)
+_ssl__SSLSocket_tls_unique_cb_impl(PySSLSocket *self)
+/*[clinic end generated code: output=f3a832d603f586af input=439525c7b3d8d34d]*/
 {
     PyObject *retval = NULL;
     char buf[PySSL_CB_MAXLEN];
@@ -2075,13 +2141,6 @@
     return retval;
 }
 
-PyDoc_STRVAR(PySSL_tls_unique_cb_doc,
-"tls_unique_cb() -> bytes\n\
-\n\
-Returns the 'tls-unique' channel binding data, as defined by RFC 5929.\n\
-\n\
-If the TLS handshake is not yet complete, None is returned");
-
 static PyGetSetDef ssl_getsetlist[] = {
     {"context", (getter) PySSL_get_context,
                 (setter) PySSL_set_context, PySSL_set_context_doc},
@@ -2095,29 +2154,19 @@
 };
 
 static PyMethodDef PySSLMethods[] = {
-    {"do_handshake", (PyCFunction)PySSL_SSLdo_handshake, METH_NOARGS},
-    {"write", (PyCFunction)PySSL_SSLwrite, METH_VARARGS,
-     PySSL_SSLwrite_doc},
-    {"read", (PyCFunction)PySSL_SSLread, METH_VARARGS,
-     PySSL_SSLread_doc},
-    {"pending", (PyCFunction)PySSL_SSLpending, METH_NOARGS,
-     PySSL_SSLpending_doc},
-    {"peer_certificate", (PyCFunction)PySSL_peercert, METH_VARARGS,
-     PySSL_peercert_doc},
-    {"cipher", (PyCFunction)PySSL_cipher, METH_NOARGS},
-    {"shared_ciphers", (PyCFunction)PySSL_shared_ciphers, METH_NOARGS},
-    {"version", (PyCFunction)PySSL_version, METH_NOARGS},
-#ifdef OPENSSL_NPN_NEGOTIATED
-    {"selected_npn_protocol", (PyCFunction)PySSL_selected_npn_protocol, METH_NOARGS},
-#endif
-#ifdef HAVE_ALPN
-    {"selected_alpn_protocol", (PyCFunction)PySSL_selected_alpn_protocol, METH_NOARGS},
-#endif
-    {"compression", (PyCFunction)PySSL_compression, METH_NOARGS},
-    {"shutdown", (PyCFunction)PySSL_SSLshutdown, METH_NOARGS,
-     PySSL_SSLshutdown_doc},
-    {"tls_unique_cb", (PyCFunction)PySSL_tls_unique_cb, METH_NOARGS,
-     PySSL_tls_unique_cb_doc},
+    _SSL__SSLSOCKET_DO_HANDSHAKE_METHODDEF
+    _SSL__SSLSOCKET_WRITE_METHODDEF
+    _SSL__SSLSOCKET_READ_METHODDEF
+    _SSL__SSLSOCKET_PENDING_METHODDEF
+    _SSL__SSLSOCKET_PEER_CERTIFICATE_METHODDEF
+    _SSL__SSLSOCKET_CIPHER_METHODDEF
+    _SSL__SSLSOCKET_SHARED_CIPHERS_METHODDEF
+    _SSL__SSLSOCKET_VERSION_METHODDEF
+    _SSL__SSLSOCKET_SELECTED_NPN_PROTOCOL_METHODDEF
+    _SSL__SSLSOCKET_SELECTED_ALPN_PROTOCOL_METHODDEF
+    _SSL__SSLSOCKET_COMPRESSION_METHODDEF
+    _SSL__SSLSOCKET_SHUTDOWN_METHODDEF
+    _SSL__SSLSOCKET_TLS_UNIQUE_CB_METHODDEF
     {NULL, NULL}
 };
 
@@ -2160,20 +2209,21 @@
  * _SSLContext objects
  */
 
+/*[clinic input]
+ at classmethod
+_ssl._SSLContext.__new__
+    protocol as proto_version: int
+    /
+[clinic start generated code]*/
+
 static PyObject *
-context_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+_ssl__SSLContext_impl(PyTypeObject *type, int proto_version)
+/*[clinic end generated code: output=2cf0d7a0741b6bd1 input=8d58a805b95fc534]*/
 {
-    char *kwlist[] = {"protocol", NULL};
     PySSLContext *self;
-    int proto_version = PY_SSL_VERSION_SSL23;
     long options;
     SSL_CTX *ctx = NULL;
 
-    if (!PyArg_ParseTupleAndKeywords(
-        args, kwds, "i:_SSLContext", kwlist,
-        &proto_version))
-        return NULL;
-
     PySSL_BEGIN_ALLOW_THREADS
     if (proto_version == PY_SSL_VERSION_TLS1)
         ctx = SSL_CTX_new(TLSv1_method());
@@ -2297,15 +2347,17 @@
     Py_TYPE(self)->tp_free(self);
 }
 
+/*[clinic input]
+_ssl._SSLContext.set_ciphers
+    cipherlist: str
+    /
+[clinic start generated code]*/
+
 static PyObject *
-set_ciphers(PySSLContext *self, PyObject *args)
+_ssl__SSLContext_set_ciphers_impl(PySSLContext *self, const char *cipherlist)
+/*[clinic end generated code: output=3a3162f3557c0f3f input=a7ac931b9f3ca7fc]*/
 {
-    int ret;
-    const char *cipherlist;
-
-    if (!PyArg_ParseTuple(args, "s:set_ciphers", &cipherlist))
-        return NULL;
-    ret = SSL_CTX_set_cipher_list(self->ctx, cipherlist);
+    int ret = SSL_CTX_set_cipher_list(self->ctx, cipherlist);
     if (ret == 0) {
         /* Clearing the error queue is necessary on some OpenSSL versions,
            otherwise the error will be reported again when another SSL call
@@ -2374,26 +2426,24 @@
 }
 #endif
 
+/*[clinic input]
+_ssl._SSLContext._set_npn_protocols
+    protos: Py_buffer
+    /
+[clinic start generated code]*/
+
 static PyObject *
-_set_npn_protocols(PySSLContext *self, PyObject *args)
+_ssl__SSLContext__set_npn_protocols_impl(PySSLContext *self,
+                                         Py_buffer *protos)
+/*[clinic end generated code: output=72b002c3324390c6 input=319fcb66abf95bd7]*/
 {
 #ifdef OPENSSL_NPN_NEGOTIATED
-    Py_buffer protos;
-
-    if (!PyArg_ParseTuple(args, "y*:set_npn_protocols", &protos))
-        return NULL;
-
-    if (self->npn_protocols != NULL) {
-        PyMem_Free(self->npn_protocols);
-    }
-
-    self->npn_protocols = PyMem_Malloc(protos.len);
-    if (self->npn_protocols == NULL) {
-        PyBuffer_Release(&protos);
+    PyMem_Free(self->npn_protocols);
+    self->npn_protocols = PyMem_Malloc(protos->len);
+    if (self->npn_protocols == NULL)
         return PyErr_NoMemory();
-    }
-    memcpy(self->npn_protocols, protos.buf, protos.len);
-    self->npn_protocols_len = (int) protos.len;
+    memcpy(self->npn_protocols, protos->buf, protos->len);
+    self->npn_protocols_len = (int) protos->len;
 
     /* set both server and client callbacks, because the context can
      * be used to create both types of sockets */
@@ -2404,7 +2454,6 @@
                                      _selectNPN_cb,
                                      self);
 
-    PyBuffer_Release(&protos);
     Py_RETURN_NONE;
 #else
     PyErr_SetString(PyExc_NotImplementedError,
@@ -2427,28 +2476,29 @@
 }
 #endif
 
+/*[clinic input]
+_ssl._SSLContext._set_alpn_protocols
+    protos: Py_buffer
+    /
+[clinic start generated code]*/
+
 static PyObject *
-_set_alpn_protocols(PySSLContext *self, PyObject *args)
+_ssl__SSLContext__set_alpn_protocols_impl(PySSLContext *self,
+                                          Py_buffer *protos)
+/*[clinic end generated code: output=87599a7f76651a9b input=9bba964595d519be]*/
 {
 #ifdef HAVE_ALPN
-    Py_buffer protos;
-
-    if (!PyArg_ParseTuple(args, "y*:set_npn_protocols", &protos))
-        return NULL;
-
     PyMem_FREE(self->alpn_protocols);
-    self->alpn_protocols = PyMem_Malloc(protos.len);
+    self->alpn_protocols = PyMem_Malloc(protos->len);
     if (!self->alpn_protocols)
         return PyErr_NoMemory();
-    memcpy(self->alpn_protocols, protos.buf, protos.len);
-    self->alpn_protocols_len = protos.len;
-    PyBuffer_Release(&protos);
+    memcpy(self->alpn_protocols, protos->buf, protos->len);
+    self->alpn_protocols_len = protos->len;
 
     if (SSL_CTX_set_alpn_protos(self->ctx, self->alpn_protocols, self->alpn_protocols_len))
         return PyErr_NoMemory();
     SSL_CTX_set_alpn_select_cb(self->ctx, _selectALPN_cb, self);
 
-    PyBuffer_Release(&protos);
     Py_RETURN_NONE;
 #else
     PyErr_SetString(PyExc_NotImplementedError,
@@ -2693,11 +2743,19 @@
     return -1;
 }
 
+/*[clinic input]
+_ssl._SSLContext.load_cert_chain
+    certfile: object
+    keyfile: object = NULL
+    password: object = NULL
+
+[clinic start generated code]*/
+
 static PyObject *
-load_cert_chain(PySSLContext *self, PyObject *args, PyObject *kwds)
+_ssl__SSLContext_load_cert_chain_impl(PySSLContext *self, PyObject *certfile,
+                                      PyObject *keyfile, PyObject *password)
+/*[clinic end generated code: output=9480bc1c380e2095 input=7cf9ac673cbee6fc]*/
 {
-    char *kwlist[] = {"certfile", "keyfile", "password", NULL};
-    PyObject *certfile, *keyfile = NULL, *password = NULL;
     PyObject *certfile_bytes = NULL, *keyfile_bytes = NULL;
     pem_password_cb *orig_passwd_cb = self->ctx->default_passwd_callback;
     void *orig_passwd_userdata = self->ctx->default_passwd_callback_userdata;
@@ -2706,10 +2764,6 @@
 
     errno = 0;
     ERR_clear_error();
-    if (!PyArg_ParseTupleAndKeywords(args, kwds,
-        "O|OO:load_cert_chain", kwlist,
-        &certfile, &keyfile, &password))
-        return NULL;
     if (keyfile == Py_None)
         keyfile = NULL;
     if (!PyUnicode_FSConverter(certfile, &certfile_bytes)) {
@@ -2877,21 +2931,26 @@
 }
 
 
+/*[clinic input]
+_ssl._SSLContext.load_verify_locations
+    cafile: object = NULL
+    capath: object = NULL
+    cadata: object = NULL
+
+[clinic start generated code]*/
+
 static PyObject *
-load_verify_locations(PySSLContext *self, PyObject *args, PyObject *kwds)
+_ssl__SSLContext_load_verify_locations_impl(PySSLContext *self,
+                                            PyObject *cafile,
+                                            PyObject *capath,
+                                            PyObject *cadata)
+/*[clinic end generated code: output=454c7e41230ca551 input=997f1fb3a784ef88]*/
 {
-    char *kwlist[] = {"cafile", "capath", "cadata", NULL};
-    PyObject *cafile = NULL, *capath = NULL, *cadata = NULL;
     PyObject *cafile_bytes = NULL, *capath_bytes = NULL;
     const char *cafile_buf = NULL, *capath_buf = NULL;
     int r = 0, ok = 1;
 
     errno = 0;
-    if (!PyArg_ParseTupleAndKeywords(args, kwds,
-        "|OOO:load_verify_locations", kwlist,
-        &cafile, &capath, &cadata))
-        return NULL;
-
     if (cafile == Py_None)
         cafile = NULL;
     if (capath == Py_None)
@@ -2988,8 +3047,16 @@
     }
 }
 
+/*[clinic input]
+_ssl._SSLContext.load_dh_params
+    path as filepath: object
+    /
+
+[clinic start generated code]*/
+
 static PyObject *
-load_dh_params(PySSLContext *self, PyObject *filepath)
+_ssl__SSLContext_load_dh_params(PySSLContext *self, PyObject *filepath)
+/*[clinic end generated code: output=1c8e57a38e055af0 input=c8871f3c796ae1d6]*/
 {
     FILE *f;
     DH *dh;
@@ -3019,53 +3086,57 @@
     Py_RETURN_NONE;
 }
 
+/*[clinic input]
+_ssl._SSLContext._wrap_socket
+    sock: object(subclass_of="PySocketModule.Sock_Type")
+    server_side: int
+    server_hostname as hostname_obj: object = None
+
+[clinic start generated code]*/
+
 static PyObject *
-context_wrap_socket(PySSLContext *self, PyObject *args, PyObject *kwds)
+_ssl__SSLContext__wrap_socket_impl(PySSLContext *self, PyObject *sock,
+                                   int server_side, PyObject *hostname_obj)
+/*[clinic end generated code: output=6973e4b60995e933 input=83859b9156ddfc63]*/
 {
-    char *kwlist[] = {"sock", "server_side", "server_hostname", NULL};
-    PySocketSockObject *sock;
-    int server_side = 0;
     char *hostname = NULL;
-    PyObject *hostname_obj, *res;
+    PyObject *res;
 
     /* server_hostname is either None (or absent), or to be encoded
        using the idna encoding. */
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, "O!i|O!:_wrap_socket", kwlist,
-                                     PySocketModule.Sock_Type,
-                                     &sock, &server_side,
-                                     Py_TYPE(Py_None), &hostname_obj)) {
-        PyErr_Clear();
-        if (!PyArg_ParseTupleAndKeywords(args, kwds, "O!iet:_wrap_socket", kwlist,
-            PySocketModule.Sock_Type,
-            &sock, &server_side,
-            "idna", &hostname))
+    if (hostname_obj != Py_None) {
+        if (!PyArg_Parse(hostname_obj, "et", "idna", &hostname))
             return NULL;
     }
 
-    res = (PyObject *) newPySSLSocket(self, sock, server_side, hostname,
+    res = (PyObject *) newPySSLSocket(self, (PySocketSockObject *)sock,
+                                      server_side, hostname,
                                       NULL, NULL);
     if (hostname != NULL)
         PyMem_Free(hostname);
     return res;
 }
 
+/*[clinic input]
+_ssl._SSLContext._wrap_bio
+    incoming: object(subclass_of="&PySSLMemoryBIO_Type", type="PySSLMemoryBIO *")
+    outgoing: object(subclass_of="&PySSLMemoryBIO_Type", type="PySSLMemoryBIO *")
+    server_side: int
+    server_hostname as hostname_obj: object = None
+
+[clinic start generated code]*/
+
 static PyObject *
-context_wrap_bio(PySSLContext *self, PyObject *args, PyObject *kwds)
+_ssl__SSLContext__wrap_bio_impl(PySSLContext *self, PySSLMemoryBIO *incoming,
+                                PySSLMemoryBIO *outgoing, int server_side,
+                                PyObject *hostname_obj)
+/*[clinic end generated code: output=4fe4ba75ad95940d input=17725ecdac0bf220]*/
 {
-    char *kwlist[] = {"incoming", "outgoing", "server_side",
-                      "server_hostname", NULL};
-    int server_side;
     char *hostname = NULL;
-    PyObject *hostname_obj = Py_None, *res;
-    PySSLMemoryBIO *incoming, *outgoing;
+    PyObject *res;
 
     /* server_hostname is either None (or absent), or to be encoded
        using the idna encoding. */
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, "O!O!i|O:_wrap_bio", kwlist,
-                                     &PySSLMemoryBIO_Type, &incoming,
-                                     &PySSLMemoryBIO_Type, &outgoing,
-                                     &server_side, &hostname_obj))
-        return NULL;
     if (hostname_obj != Py_None) {
         if (!PyArg_Parse(hostname_obj, "et", "idna", &hostname))
             return NULL;
@@ -3078,8 +3149,13 @@
     return res;
 }
 
+/*[clinic input]
+_ssl._SSLContext.session_stats
+[clinic start generated code]*/
+
 static PyObject *
-session_stats(PySSLContext *self, PyObject *unused)
+_ssl__SSLContext_session_stats_impl(PySSLContext *self)
+/*[clinic end generated code: output=0d96411c42893bfb input=7e0a81fb11102c8b]*/
 {
     int r;
     PyObject *value, *stats = PyDict_New();
@@ -3117,8 +3193,13 @@
     return NULL;
 }
 
+/*[clinic input]
+_ssl._SSLContext.set_default_verify_paths
+[clinic start generated code]*/
+
 static PyObject *
-set_default_verify_paths(PySSLContext *self, PyObject *unused)
+_ssl__SSLContext_set_default_verify_paths_impl(PySSLContext *self)
+/*[clinic end generated code: output=0bee74e6e09deaaa input=35f3408021463d74]*/
 {
     if (!SSL_CTX_set_default_verify_paths(self->ctx)) {
         _setSSLError(NULL, 0, __FILE__, __LINE__);
@@ -3128,8 +3209,16 @@
 }
 
 #ifndef OPENSSL_NO_ECDH
+/*[clinic input]
+_ssl._SSLContext.set_ecdh_curve
+    name: object
+    /
+
+[clinic start generated code]*/
+
 static PyObject *
-set_ecdh_curve(PySSLContext *self, PyObject *name)
+_ssl__SSLContext_set_ecdh_curve(PySSLContext *self, PyObject *name)
+/*[clinic end generated code: output=23022c196e40d7d2 input=c2bafb6f6e34726b]*/
 {
     PyObject *name_bytes;
     int nid;
@@ -3263,25 +3352,23 @@
 }
 #endif
 
-PyDoc_STRVAR(PySSL_set_servername_callback_doc,
-"set_servername_callback(method)\n\
-\n\
-This sets a callback that will be called when a server name is provided by\n\
-the SSL/TLS client in the SNI extension.\n\
-\n\
-If the argument is None then the callback is disabled. The method is called\n\
-with the SSLSocket, the server name as a string, and the SSLContext object.\n\
-See RFC 6066 for details of the SNI extension.");
+/*[clinic input]
+_ssl._SSLContext.set_servername_callback
+    method as cb: object
+    /
+
+Set a callback that will be called when a server name is provided by the SSL/TLS client in the SNI extension.
+
+If the argument is None then the callback is disabled. The method is called
+with the SSLSocket, the server name as a string, and the SSLContext object.
+See RFC 6066 for details of the SNI extension.
+[clinic start generated code]*/
 
 static PyObject *
-set_servername_callback(PySSLContext *self, PyObject *args)
+_ssl__SSLContext_set_servername_callback(PySSLContext *self, PyObject *cb)
+/*[clinic end generated code: output=3439a1b2d5d3b7ea input=a2a83620197d602b]*/
 {
 #if HAVE_SNI && !defined(OPENSSL_NO_TLSEXT)
-    PyObject *cb;
-
-    if (!PyArg_ParseTuple(args, "O", &cb))
-        return NULL;
-
     Py_CLEAR(self->set_hostname);
     if (cb == Py_None) {
         SSL_CTX_set_tlsext_servername_callback(self->ctx, NULL);
@@ -3308,17 +3395,21 @@
 #endif
 }
 
-PyDoc_STRVAR(PySSL_get_stats_doc,
-"cert_store_stats() -> {'crl': int, 'x509_ca': int, 'x509': int}\n\
-\n\
-Returns quantities of loaded X.509 certificates. X.509 certificates with a\n\
-CA extension and certificate revocation lists inside the context's cert\n\
-store.\n\
-NOTE: Certificates in a capath directory aren't loaded unless they have\n\
-been used at least once.");
+/*[clinic input]
+_ssl._SSLContext.cert_store_stats
+
+Returns quantities of loaded X.509 certificates.
+
+X.509 certificates with a CA extension and certificate revocation lists
+inside the context's cert store.
+
+NOTE: Certificates in a capath directory aren't loaded unless they have
+been used at least once.
+[clinic start generated code]*/
 
 static PyObject *
-cert_store_stats(PySSLContext *self)
+_ssl__SSLContext_cert_store_stats_impl(PySSLContext *self)
+/*[clinic end generated code: output=5f356f4d9cca874d input=eb40dd0f6d0e40cf]*/
 {
     X509_STORE *store;
     X509_OBJECT *obj;
@@ -3351,27 +3442,26 @@
         "x509_ca", ca);
 }
 
-PyDoc_STRVAR(PySSL_get_ca_certs_doc,
-"get_ca_certs(binary_form=False) -> list of loaded certificate\n\
-\n\
-Returns a list of dicts with information of loaded CA certs. If the\n\
-optional argument is True, returns a DER-encoded copy of the CA certificate.\n\
-NOTE: Certificates in a capath directory aren't loaded unless they have\n\
-been used at least once.");
+/*[clinic input]
+_ssl._SSLContext.get_ca_certs
+    binary_form: bool = False
+
+Returns a list of dicts with information of loaded CA certs.
+
+If the optional argument is True, returns a DER-encoded copy of the CA
+certificate.
+
+NOTE: Certificates in a capath directory aren't loaded unless they have
+been used at least once.
+[clinic start generated code]*/
 
 static PyObject *
-get_ca_certs(PySSLContext *self, PyObject *args, PyObject *kwds)
+_ssl__SSLContext_get_ca_certs_impl(PySSLContext *self, int binary_form)
+/*[clinic end generated code: output=0d58f148f37e2938 input=6887b5a09b7f9076]*/
 {
-    char *kwlist[] = {"binary_form", NULL};
     X509_STORE *store;
     PyObject *ci = NULL, *rlist = NULL;
     int i;
-    int binary_mode = 0;
-
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, "|p:get_ca_certs",
-                                     kwlist, &binary_mode)) {
-        return NULL;
-    }
 
     if ((rlist = PyList_New(0)) == NULL) {
         return NULL;
@@ -3392,7 +3482,7 @@
         if (!X509_check_ca(cert)) {
             continue;
         }
-        if (binary_mode) {
+        if (binary_form) {
             ci = _certificate_to_der(cert);
         } else {
             ci = _decode_certificate(cert);
@@ -3427,36 +3517,20 @@
 };
 
 static struct PyMethodDef context_methods[] = {
-    {"_wrap_socket", (PyCFunction) context_wrap_socket,
-                       METH_VARARGS | METH_KEYWORDS, NULL},
-    {"_wrap_bio", (PyCFunction) context_wrap_bio,
-                  METH_VARARGS | METH_KEYWORDS, NULL},
-    {"set_ciphers", (PyCFunction) set_ciphers,
-                    METH_VARARGS, NULL},
-    {"_set_alpn_protocols", (PyCFunction) _set_alpn_protocols,
-                           METH_VARARGS, NULL},
-    {"_set_npn_protocols", (PyCFunction) _set_npn_protocols,
-                           METH_VARARGS, NULL},
-    {"load_cert_chain", (PyCFunction) load_cert_chain,
-                        METH_VARARGS | METH_KEYWORDS, NULL},
-    {"load_dh_params", (PyCFunction) load_dh_params,
-                       METH_O, NULL},
-    {"load_verify_locations", (PyCFunction) load_verify_locations,
-                              METH_VARARGS | METH_KEYWORDS, NULL},
-    {"session_stats", (PyCFunction) session_stats,
-                      METH_NOARGS, NULL},
-    {"set_default_verify_paths", (PyCFunction) set_default_verify_paths,
-                                 METH_NOARGS, NULL},
-#ifndef OPENSSL_NO_ECDH
-    {"set_ecdh_curve", (PyCFunction) set_ecdh_curve,
-                       METH_O, NULL},
-#endif
-    {"set_servername_callback", (PyCFunction) set_servername_callback,
-                    METH_VARARGS, PySSL_set_servername_callback_doc},
-    {"cert_store_stats", (PyCFunction) cert_store_stats,
-                    METH_NOARGS, PySSL_get_stats_doc},
-    {"get_ca_certs", (PyCFunction) get_ca_certs,
-                    METH_VARARGS | METH_KEYWORDS, PySSL_get_ca_certs_doc},
+    _SSL__SSLCONTEXT__WRAP_SOCKET_METHODDEF
+    _SSL__SSLCONTEXT__WRAP_BIO_METHODDEF
+    _SSL__SSLCONTEXT_SET_CIPHERS_METHODDEF
+    _SSL__SSLCONTEXT__SET_ALPN_PROTOCOLS_METHODDEF
+    _SSL__SSLCONTEXT__SET_NPN_PROTOCOLS_METHODDEF
+    _SSL__SSLCONTEXT_LOAD_CERT_CHAIN_METHODDEF
+    _SSL__SSLCONTEXT_LOAD_DH_PARAMS_METHODDEF
+    _SSL__SSLCONTEXT_LOAD_VERIFY_LOCATIONS_METHODDEF
+    _SSL__SSLCONTEXT_SESSION_STATS_METHODDEF
+    _SSL__SSLCONTEXT_SET_DEFAULT_VERIFY_PATHS_METHODDEF
+    _SSL__SSLCONTEXT_SET_ECDH_CURVE_METHODDEF
+    _SSL__SSLCONTEXT_SET_SERVERNAME_CALLBACK_METHODDEF
+    _SSL__SSLCONTEXT_CERT_STORE_STATS_METHODDEF
+    _SSL__SSLCONTEXT_GET_CA_CERTS_METHODDEF
     {NULL, NULL}        /* sentinel */
 };
 
@@ -3498,7 +3572,7 @@
     0,                                         /*tp_dictoffset*/
     0,                                         /*tp_init*/
     0,                                         /*tp_alloc*/
-    context_new,                               /*tp_new*/
+    _ssl__SSLContext,                          /*tp_new*/
 };
 
 
@@ -3506,16 +3580,19 @@
  * MemoryBIO objects
  */
 
+/*[clinic input]
+ at classmethod
+_ssl.MemoryBIO.__new__
+
+[clinic start generated code]*/
+
 static PyObject *
-memory_bio_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+_ssl_MemoryBIO_impl(PyTypeObject *type)
+/*[clinic end generated code: output=8820a58db78330ac input=26d22e4909ecb1b5]*/
 {
-    char *kwlist[] = {NULL};
     BIO *bio;
     PySSLMemoryBIO *self;
 
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, ":MemoryBIO", kwlist))
-        return NULL;
-
     bio = BIO_new(BIO_s_mem());
     if (bio == NULL) {
         PyErr_SetString(PySSLErrorObject,
@@ -3566,15 +3643,26 @@
 PyDoc_STRVAR(PySSL_memory_bio_eof_doc,
 "Whether the memory BIO is at EOF.");
 
+/*[clinic input]
+_ssl.MemoryBIO.read
+    size as len: int = -1
+    /
+
+Read up to size bytes from the memory BIO.
+
+If size is not specified, read the entire buffer.
+If the return value is an empty bytes instance, this means either
+EOF or that no data is available. Use the "eof" property to
+distinguish between the two.
+[clinic start generated code]*/
+
 static PyObject *
-memory_bio_read(PySSLMemoryBIO *self, PyObject *args)
+_ssl_MemoryBIO_read_impl(PySSLMemoryBIO *self, int len)
+/*[clinic end generated code: output=a657aa1e79cd01b3 input=574d7be06a902366]*/
 {
-    int len = -1, avail, nbytes;
+    int avail, nbytes;
     PyObject *result;
 
-    if (!PyArg_ParseTuple(args, "|i:read", &len))
-        return NULL;
-
     avail = BIO_ctrl_pending(self->bio);
     if ((len < 0) || (len > avail))
         len = avail;
@@ -3593,59 +3681,54 @@
     return result;
 }
 
-PyDoc_STRVAR(PySSL_memory_bio_read_doc,
-"read([len]) -> bytes\n\
-\n\
-Read up to len bytes from the memory BIO.\n\
-\n\
-If len is not specified, read the entire buffer.\n\
-If the return value is an empty bytes instance, this means either\n\
-EOF or that no data is available. Use the \"eof\" property to\n\
-distinguish between the two.");
+/*[clinic input]
+_ssl.MemoryBIO.write
+    b: Py_buffer
+    /
+
+Writes the bytes b into the memory BIO.
+
+Returns the number of bytes written.
+[clinic start generated code]*/
 
 static PyObject *
-memory_bio_write(PySSLMemoryBIO *self, PyObject *args)
+_ssl_MemoryBIO_write_impl(PySSLMemoryBIO *self, Py_buffer *b)
+/*[clinic end generated code: output=156ec59110d75935 input=e45757b3e17c4808]*/
 {
-    Py_buffer buf;
     int nbytes;
 
-    if (!PyArg_ParseTuple(args, "y*:write", &buf))
-        return NULL;
-
-    if (buf.len > INT_MAX) {
+    if (b->len > INT_MAX) {
         PyErr_Format(PyExc_OverflowError,
                      "string longer than %d bytes", INT_MAX);
-        goto error;
+        return NULL;
     }
 
     if (self->eof_written) {
         PyErr_SetString(PySSLErrorObject,
                         "cannot write() after write_eof()");
-        goto error;
+        return NULL;
     }
 
-    nbytes = BIO_write(self->bio, buf.buf, buf.len);
+    nbytes = BIO_write(self->bio, b->buf, b->len);
     if (nbytes < 0) {
         _setSSLError(NULL, 0, __FILE__, __LINE__);
-        goto error;
+        return NULL;
     }
 
-    PyBuffer_Release(&buf);
     return PyLong_FromLong(nbytes);
-
-error:
-    PyBuffer_Release(&buf);
-    return NULL;
 }
 
-PyDoc_STRVAR(PySSL_memory_bio_write_doc,
-"write(b) -> len\n\
-\n\
-Writes the bytes b into the memory BIO. Returns the number\n\
-of bytes written.");
+/*[clinic input]
+_ssl.MemoryBIO.write_eof
+
+Write an EOF marker to the memory BIO.
+
+When all data has been read, the "eof" property will be True.
+[clinic start generated code]*/
 
 static PyObject *
-memory_bio_write_eof(PySSLMemoryBIO *self, PyObject *args)
+_ssl_MemoryBIO_write_eof_impl(PySSLMemoryBIO *self)
+/*[clinic end generated code: output=d4106276ccd1ed34 input=56a945f1d29e8bd6]*/
 {
     self->eof_written = 1;
     /* After an EOF is written, a zero return from read() should be a real EOF
@@ -3656,12 +3739,6 @@
     Py_RETURN_NONE;
 }
 
-PyDoc_STRVAR(PySSL_memory_bio_write_eof_doc,
-"write_eof()\n\
-\n\
-Write an EOF marker to the memory BIO.\n\
-When all data has been read, the \"eof\" property will be True.");
-
 static PyGetSetDef memory_bio_getsetlist[] = {
     {"pending", (getter) memory_bio_get_pending, NULL,
                 PySSL_memory_bio_pending_doc},
@@ -3671,12 +3748,9 @@
 };
 
 static struct PyMethodDef memory_bio_methods[] = {
-    {"read", (PyCFunction) memory_bio_read,
-             METH_VARARGS, PySSL_memory_bio_read_doc},
-    {"write", (PyCFunction) memory_bio_write,
-              METH_VARARGS, PySSL_memory_bio_write_doc},
-    {"write_eof", (PyCFunction) memory_bio_write_eof,
-                  METH_NOARGS, PySSL_memory_bio_write_eof_doc},
+    _SSL_MEMORYBIO_READ_METHODDEF
+    _SSL_MEMORYBIO_WRITE_METHODDEF
+    _SSL_MEMORYBIO_WRITE_EOF_METHODDEF
     {NULL, NULL}        /* sentinel */
 };
 
@@ -3718,40 +3792,42 @@
     0,                                         /*tp_dictoffset*/
     0,                                         /*tp_init*/
     0,                                         /*tp_alloc*/
-    memory_bio_new,                            /*tp_new*/
+    _ssl_MemoryBIO,                            /*tp_new*/
 };
 
 
 /* helper routines for seeding the SSL PRNG */
+/*[clinic input]
+_ssl.RAND_add
+    string as view: Py_buffer(types={'str', 'buffer'})
+    entropy: double
+    /
+
+Mix string into the OpenSSL PRNG state.
+
+entropy (a float) is a lower bound on the entropy contained in
+string.  See RFC 1750.
+[clinic start generated code]*/
+
 static PyObject *
-PySSL_RAND_add(PyObject *self, PyObject *args)
+_ssl_RAND_add_impl(PyModuleDef *module, Py_buffer *view, double entropy)
+/*[clinic end generated code: output=0f8d5c8cce328958 input=c98b11d606b354bc]*/
 {
-    Py_buffer view;
     const char *buf;
     Py_ssize_t len, written;
-    double entropy;
-
-    if (!PyArg_ParseTuple(args, "s*d:RAND_add", &view, &entropy))
-        return NULL;
-    buf = (const char *)view.buf;
-    len = view.len;
+
+    buf = (const char *)view->buf;
+    len = view->len;
     do {
         written = Py_MIN(len, INT_MAX);
         RAND_add(buf, (int)written, entropy);
         buf += written;
         len -= written;
     } while (len);
-    PyBuffer_Release(&view);
     Py_INCREF(Py_None);
     return Py_None;
 }
 
-PyDoc_STRVAR(PySSL_RAND_add_doc,
-"RAND_add(string, entropy)\n\
-\n\
-Mix string into the OpenSSL PRNG state.  entropy (a float) is a lower\n\
-bound on the entropy contained in string.  See RFC 1750.");
-
 static PyObject *
 PySSL_RAND(int len, int pseudo)
 {
@@ -3791,60 +3867,72 @@
     return NULL;
 }
 
+/*[clinic input]
+_ssl.RAND_bytes
+    n: int
+    /
+
+Generate n cryptographically strong pseudo-random bytes.
+[clinic start generated code]*/
+
 static PyObject *
-PySSL_RAND_bytes(PyObject *self, PyObject *args)
+_ssl_RAND_bytes_impl(PyModuleDef *module, int n)
+/*[clinic end generated code: output=7d8741bdc1d435f3 input=678ddf2872dfebfc]*/
 {
-    int len;
-    if (!PyArg_ParseTuple(args, "i:RAND_bytes", &len))
-        return NULL;
-    return PySSL_RAND(len, 0);
+    return PySSL_RAND(n, 0);
 }
 
-PyDoc_STRVAR(PySSL_RAND_bytes_doc,
-"RAND_bytes(n) -> bytes\n\
-\n\
-Generate n cryptographically strong pseudo-random bytes.");
+/*[clinic input]
+_ssl.RAND_pseudo_bytes
+    n: int
+    /
+
+Generate n pseudo-random bytes.
+
+Return a pair (bytes, is_cryptographic).  is_cryptographic is True
+if the bytes generated are cryptographically strong.
+[clinic start generated code]*/
 
 static PyObject *
-PySSL_RAND_pseudo_bytes(PyObject *self, PyObject *args)
+_ssl_RAND_pseudo_bytes_impl(PyModuleDef *module, int n)
+/*[clinic end generated code: output=dd673813107f3875 input=58312bd53f9bbdd0]*/
 {
-    int len;
-    if (!PyArg_ParseTuple(args, "i:RAND_pseudo_bytes", &len))
-        return NULL;
-    return PySSL_RAND(len, 1);
+    return PySSL_RAND(n, 1);
 }
 
-PyDoc_STRVAR(PySSL_RAND_pseudo_bytes_doc,
-"RAND_pseudo_bytes(n) -> (bytes, is_cryptographic)\n\
-\n\
-Generate n pseudo-random bytes. is_cryptographic is True if the bytes\
-generated are cryptographically strong.");
+/*[clinic input]
+_ssl.RAND_status
+
+Returns 1 if the OpenSSL PRNG has been seeded with enough data and 0 if not.
+
+It is necessary to seed the PRNG with RAND_add() on some platforms before
+using the ssl() function.
+[clinic start generated code]*/
 
 static PyObject *
-PySSL_RAND_status(PyObject *self)
+_ssl_RAND_status_impl(PyModuleDef *module)
+/*[clinic end generated code: output=7f7ef57bc7dd1d1c input=8a774b02d1dc81f3]*/
 {
     return PyLong_FromLong(RAND_status());
 }
 
-PyDoc_STRVAR(PySSL_RAND_status_doc,
-"RAND_status() -> 0 or 1\n\
-\n\
-Returns 1 if the OpenSSL PRNG has been seeded with enough data and 0 if not.\n\
-It is necessary to seed the PRNG with RAND_add() on some platforms before\n\
-using the ssl() function.");
-
 #ifdef HAVE_RAND_EGD
+/*[clinic input]
+_ssl.RAND_egd
+    path: object(converter="PyUnicode_FSConverter")
+    /
+
+Queries the entropy gather daemon (EGD) on the socket named by 'path'.
+
+Returns number of bytes read.  Raises SSLError if connection to EGD
+fails or if it does not provide enough data to seed PRNG.
+[clinic start generated code]*/
+
 static PyObject *
-PySSL_RAND_egd(PyObject *self, PyObject *args)
+_ssl_RAND_egd_impl(PyModuleDef *module, PyObject *path)
+/*[clinic end generated code: output=8e728e501e28541b input=1aeb7eb948312195]*/
 {
-    PyObject *path;
-    int bytes;
-
-    if (!PyArg_ParseTuple(args, "O&:RAND_egd",
-                          PyUnicode_FSConverter, &path))
-        return NULL;
-
-    bytes = RAND_egd(PyBytes_AsString(path));
+    int bytes = RAND_egd(PyBytes_AsString(path));
     Py_DECREF(path);
     if (bytes == -1) {
         PyErr_SetString(PySSLErrorObject,
@@ -3854,25 +3942,21 @@
     }
     return PyLong_FromLong(bytes);
 }
-
-PyDoc_STRVAR(PySSL_RAND_egd_doc,
-"RAND_egd(path) -> bytes\n\
-\n\
-Queries the entropy gather daemon (EGD) on the socket named by 'path'.\n\
-Returns number of bytes read.  Raises SSLError if connection to EGD\n\
-fails or if it does not provide enough data to seed PRNG.");
 #endif /* HAVE_RAND_EGD */
 
 
-PyDoc_STRVAR(PySSL_get_default_verify_paths_doc,
-"get_default_verify_paths() -> tuple\n\
-\n\
-Return search paths and environment vars that are used by SSLContext's\n\
-set_default_verify_paths() to load default CAs. The values are\n\
-'cert_file_env', 'cert_file', 'cert_dir_env', 'cert_dir'.");
+
+/*[clinic input]
+_ssl.get_default_verify_paths
+
+Return search paths and environment vars that are used by SSLContext's set_default_verify_paths() to load default CAs.
+
+The values are 'cert_file_env', 'cert_file', 'cert_dir_env', 'cert_dir'.
+[clinic start generated code]*/
 
 static PyObject *
-PySSL_get_default_verify_paths(PyObject *self)
+_ssl_get_default_verify_paths_impl(PyModuleDef *module)
+/*[clinic end generated code: output=5a2820ce7e3304d3 input=5210c953d98c3eb5]*/
 {
     PyObject *ofile_env = NULL;
     PyObject *ofile = NULL;
@@ -3931,26 +4015,24 @@
     }
 }
 
-PyDoc_STRVAR(PySSL_txt2obj_doc,
-"txt2obj(txt, name=False) -> (nid, shortname, longname, oid)\n\
-\n\
-Lookup NID, short name, long name and OID of an ASN1_OBJECT. By default\n\
-objects are looked up by OID. With name=True short and long name are also\n\
-matched.");
-
-static PyObject*
-PySSL_txt2obj(PyObject *self, PyObject *args, PyObject *kwds)
+/*[clinic input]
+_ssl.txt2obj
+    txt: str
+    name: bool = False
+
+Lookup NID, short name, long name and OID of an ASN1_OBJECT.
+
+By default objects are looked up by OID. With name=True short and
+long name are also matched.
+[clinic start generated code]*/
+
+static PyObject *
+_ssl_txt2obj_impl(PyModuleDef *module, const char *txt, int name)
+/*[clinic end generated code: output=2ae2c30531b8809f input=1c1e7d0aa7c48602]*/
 {
-    char *kwlist[] = {"txt", "name", NULL};
     PyObject *result = NULL;
-    char *txt;
-    int name = 0;
     ASN1_OBJECT *obj;
 
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|p:txt2obj",
-                                     kwlist, &txt, &name)) {
-        return NULL;
-    }
     obj = OBJ_txt2obj(txt, name ? 0 : 1);
     if (obj == NULL) {
         PyErr_Format(PyExc_ValueError, "unknown object '%.100s'", txt);
@@ -3961,21 +4043,21 @@
     return result;
 }
 
-PyDoc_STRVAR(PySSL_nid2obj_doc,
-"nid2obj(nid) -> (nid, shortname, longname, oid)\n\
-\n\
-Lookup NID, short name, long name and OID of an ASN1_OBJECT by NID.");
-
-static PyObject*
-PySSL_nid2obj(PyObject *self, PyObject *args)
+/*[clinic input]
+_ssl.nid2obj
+    nid: int
+    /
+
+Lookup NID, short name, long name and OID of an ASN1_OBJECT by NID.
+[clinic start generated code]*/
+
+static PyObject *
+_ssl_nid2obj_impl(PyModuleDef *module, int nid)
+/*[clinic end generated code: output=8db1df89e44badb8 input=51787a3bee7d8f98]*/
 {
     PyObject *result = NULL;
-    int nid;
     ASN1_OBJECT *obj;
 
-    if (!PyArg_ParseTuple(args, "i:nid2obj", &nid)) {
-        return NULL;
-    }
     if (nid < NID_undef) {
         PyErr_SetString(PyExc_ValueError, "NID must be positive.");
         return NULL;
@@ -4075,30 +4157,28 @@
     return retval;
 }
 
-PyDoc_STRVAR(PySSL_enum_certificates_doc,
-"enum_certificates(store_name) -> []\n\
-\n\
-Retrieve certificates from Windows' cert store. store_name may be one of\n\
-'CA', 'ROOT' or 'MY'. The system may provide more cert storages, too.\n\
-The function returns a list of (bytes, encoding_type, trust) tuples. The\n\
-encoding_type flag can be interpreted with X509_ASN_ENCODING or\n\
-PKCS_7_ASN_ENCODING. The trust setting is either a set of OIDs or the\n\
-boolean True.");
+/*[clinic input]
+_ssl.enum_certificates
+    store_name: str
+
+Retrieve certificates from Windows' cert store.
+
+store_name may be one of 'CA', 'ROOT' or 'MY'.  The system may provide
+more cert storages, too.  The function returns a list of (bytes,
+encoding_type, trust) tuples.  The encoding_type flag can be interpreted
+with X509_ASN_ENCODING or PKCS_7_ASN_ENCODING. The trust setting is either
+a set of OIDs or the boolean True.
+[clinic start generated code]*/
 
 static PyObject *
-PySSL_enum_certificates(PyObject *self, PyObject *args, PyObject *kwds)
+_ssl_enum_certificates_impl(PyModuleDef *module, const char *store_name)
+/*[clinic end generated code: output=cc4ebc10b8adacfc input=915f60d70461ea4e]*/
 {
-    char *kwlist[] = {"store_name", NULL};
-    char *store_name;
     HCERTSTORE hStore = NULL;
     PCCERT_CONTEXT pCertCtx = NULL;
     PyObject *keyusage = NULL, *cert = NULL, *enc = NULL, *tup = NULL;
     PyObject *result = NULL;
 
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, "s:enum_certificates",
-                                     kwlist, &store_name)) {
-        return NULL;
-    }
     result = PyList_New(0);
     if (result == NULL) {
         return NULL;
@@ -4164,29 +4244,27 @@
     return result;
 }
 
-PyDoc_STRVAR(PySSL_enum_crls_doc,
-"enum_crls(store_name) -> []\n\
-\n\
-Retrieve CRLs from Windows' cert store. store_name may be one of\n\
-'CA', 'ROOT' or 'MY'. The system may provide more cert storages, too.\n\
-The function returns a list of (bytes, encoding_type) tuples. The\n\
-encoding_type flag can be interpreted with X509_ASN_ENCODING or\n\
-PKCS_7_ASN_ENCODING.");
+/*[clinic input]
+_ssl.enum_crls
+    store_name: str
+
+Retrieve CRLs from Windows' cert store.
+
+store_name may be one of 'CA', 'ROOT' or 'MY'.  The system may provide
+more cert storages, too.  The function returns a list of (bytes,
+encoding_type) tuples.  The encoding_type flag can be interpreted with
+X509_ASN_ENCODING or PKCS_7_ASN_ENCODING.
+[clinic start generated code]*/
 
 static PyObject *
-PySSL_enum_crls(PyObject *self, PyObject *args, PyObject *kwds)
+_ssl_enum_crls_impl(PyModuleDef *module, const char *store_name)
+/*[clinic end generated code: output=763490a2aa1c50d5 input=a1f1d7629f1c5d3d]*/
 {
-    char *kwlist[] = {"store_name", NULL};
-    char *store_name;
     HCERTSTORE hStore = NULL;
     PCCRL_CONTEXT pCrlCtx = NULL;
     PyObject *crl = NULL, *enc = NULL, *tup = NULL;
     PyObject *result = NULL;
 
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, "s:enum_crls",
-                                     kwlist, &store_name)) {
-        return NULL;
-    }
     result = PyList_New(0);
     if (result == NULL) {
         return NULL;
@@ -4244,34 +4322,18 @@
 #endif /* _MSC_VER */
 
 /* List of functions exported by this module. */
-
 static PyMethodDef PySSL_methods[] = {
-    {"_test_decode_cert",       PySSL_test_decode_certificate,
-     METH_VARARGS},
-    {"RAND_add",            PySSL_RAND_add, METH_VARARGS,
-     PySSL_RAND_add_doc},
-    {"RAND_bytes",          PySSL_RAND_bytes, METH_VARARGS,
-     PySSL_RAND_bytes_doc},
-    {"RAND_pseudo_bytes",   PySSL_RAND_pseudo_bytes, METH_VARARGS,
-     PySSL_RAND_pseudo_bytes_doc},
-#ifdef HAVE_RAND_EGD
-    {"RAND_egd",            PySSL_RAND_egd, METH_VARARGS,
-     PySSL_RAND_egd_doc},
-#endif
-    {"RAND_status",         (PyCFunction)PySSL_RAND_status, METH_NOARGS,
-     PySSL_RAND_status_doc},
-    {"get_default_verify_paths", (PyCFunction)PySSL_get_default_verify_paths,
-     METH_NOARGS, PySSL_get_default_verify_paths_doc},
-#ifdef _MSC_VER
-    {"enum_certificates", (PyCFunction)PySSL_enum_certificates,
-     METH_VARARGS | METH_KEYWORDS, PySSL_enum_certificates_doc},
-    {"enum_crls", (PyCFunction)PySSL_enum_crls,
-     METH_VARARGS | METH_KEYWORDS, PySSL_enum_crls_doc},
-#endif
-    {"txt2obj", (PyCFunction)PySSL_txt2obj,
-     METH_VARARGS | METH_KEYWORDS, PySSL_txt2obj_doc},
-    {"nid2obj", (PyCFunction)PySSL_nid2obj,
-     METH_VARARGS, PySSL_nid2obj_doc},
+    _SSL__TEST_DECODE_CERT_METHODDEF
+    _SSL_RAND_ADD_METHODDEF
+    _SSL_RAND_BYTES_METHODDEF
+    _SSL_RAND_PSEUDO_BYTES_METHODDEF
+    _SSL_RAND_EGD_METHODDEF
+    _SSL_RAND_STATUS_METHODDEF
+    _SSL_GET_DEFAULT_VERIFY_PATHS_METHODDEF
+    _SSL_ENUM_CERTIFICATES_METHODDEF
+    _SSL_ENUM_CRLS_METHODDEF
+    _SSL_TXT2OBJ_METHODDEF
+    _SSL_NID2OBJ_METHODDEF
     {NULL,                  NULL}            /* Sentinel */
 };
 
diff --git a/Modules/_ssl.c b/Modules/clinic/_ssl.c.h
copy from Modules/_ssl.c
copy to Modules/clinic/_ssl.c.h
--- a/Modules/_ssl.c
+++ b/Modules/clinic/_ssl.c.h
@@ -1,4719 +1,1105 @@
-/* SSL socket module
+/*[clinic input]
+preserve
+[clinic start generated code]*/
 
-   SSL support based on patches by Brian E Gallew and Laszlo Kovacs.
-   Re-worked a bit by Bill Janssen to add server-side support and
-   certificate decoding.  Chris Stawarz contributed some non-blocking
-   patches.
+PyDoc_STRVAR(_ssl__SSLSocket_do_handshake__doc__,
+"do_handshake($self, /)\n"
+"--\n"
+"\n");
 
-   This module is imported by ssl.py. It should *not* be used
-   directly.
-
-   XXX should partial writes be enabled, SSL_MODE_ENABLE_PARTIAL_WRITE?
-
-   XXX integrate several "shutdown modes" as suggested in
-       http://bugs.python.org/issue8108#msg102867 ?
-*/
-
-#define PY_SSIZE_T_CLEAN
-
-#include "Python.h"
-
-#ifdef WITH_THREAD
-#include "pythread.h"
-
-
-#define PySSL_BEGIN_ALLOW_THREADS_S(save) \
-    do { if (_ssl_locks_count>0) { (save) = PyEval_SaveThread(); } } while (0)
-#define PySSL_END_ALLOW_THREADS_S(save) \
-    do { if (_ssl_locks_count>0) { PyEval_RestoreThread(save); } } while (0)
-#define PySSL_BEGIN_ALLOW_THREADS { \
-            PyThreadState *_save = NULL;  \
-            PySSL_BEGIN_ALLOW_THREADS_S(_save);
-#define PySSL_BLOCK_THREADS     PySSL_END_ALLOW_THREADS_S(_save);
-#define PySSL_UNBLOCK_THREADS   PySSL_BEGIN_ALLOW_THREADS_S(_save);
-#define PySSL_END_ALLOW_THREADS PySSL_END_ALLOW_THREADS_S(_save); }
-
-#else   /* no WITH_THREAD */
-
-#define PySSL_BEGIN_ALLOW_THREADS_S(save)
-#define PySSL_END_ALLOW_THREADS_S(save)
-#define PySSL_BEGIN_ALLOW_THREADS
-#define PySSL_BLOCK_THREADS
-#define PySSL_UNBLOCK_THREADS
-#define PySSL_END_ALLOW_THREADS
-
-#endif
-
-/* Include symbols from _socket module */
-#include "socketmodule.h"
-
-static PySocketModule_APIObject PySocketModule;
-
-#if defined(HAVE_POLL_H)
-#include <poll.h>
-#elif defined(HAVE_SYS_POLL_H)
-#include <sys/poll.h>
-#endif
-
-/* Include OpenSSL header files */
-#include "openssl/rsa.h"
-#include "openssl/crypto.h"
-#include "openssl/x509.h"
-#include "openssl/x509v3.h"
-#include "openssl/pem.h"
-#include "openssl/ssl.h"
-#include "openssl/err.h"
-#include "openssl/rand.h"
-#include "openssl/bio.h"
-
-/* SSL error object */
-static PyObject *PySSLErrorObject;
-static PyObject *PySSLZeroReturnErrorObject;
-static PyObject *PySSLWantReadErrorObject;
-static PyObject *PySSLWantWriteErrorObject;
-static PyObject *PySSLSyscallErrorObject;
-static PyObject *PySSLEOFErrorObject;
-
-/* Error mappings */
-static PyObject *err_codes_to_names;
-static PyObject *err_names_to_codes;
-static PyObject *lib_codes_to_names;
-
-struct py_ssl_error_code {
-    const char *mnemonic;
-    int library, reason;
-};
-struct py_ssl_library_code {
-    const char *library;
-    int code;
-};
-
-/* Include generated data (error codes) */
-#include "_ssl_data.h"
-
-/* Openssl comes with TLSv1.1 and TLSv1.2 between 1.0.0h and 1.0.1
-    http://www.openssl.org/news/changelog.html
- */
-#if OPENSSL_VERSION_NUMBER >= 0x10001000L
-# define HAVE_TLSv1_2 1
-#else
-# define HAVE_TLSv1_2 0
-#endif
-
-/* SNI support (client- and server-side) appeared in OpenSSL 1.0.0 and 0.9.8f
- * This includes the SSL_set_SSL_CTX() function.
- */
-#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
-# define HAVE_SNI 1
-#else
-# define HAVE_SNI 0
-#endif
-
-/* ALPN added in OpenSSL 1.0.2 */
-#if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER >= 0x1000200fL && !defined(OPENSSL_NO_TLSEXT)
-# define HAVE_ALPN
-#endif
-
-enum py_ssl_error {
-    /* these mirror ssl.h */
-    PY_SSL_ERROR_NONE,
-    PY_SSL_ERROR_SSL,
-    PY_SSL_ERROR_WANT_READ,
-    PY_SSL_ERROR_WANT_WRITE,
-    PY_SSL_ERROR_WANT_X509_LOOKUP,
-    PY_SSL_ERROR_SYSCALL,     /* look at error stack/return value/errno */
-    PY_SSL_ERROR_ZERO_RETURN,
-    PY_SSL_ERROR_WANT_CONNECT,
-    /* start of non ssl.h errorcodes */
-    PY_SSL_ERROR_EOF,         /* special case of SSL_ERROR_SYSCALL */
-    PY_SSL_ERROR_NO_SOCKET,   /* socket has been GC'd */
-    PY_SSL_ERROR_INVALID_ERROR_CODE
-};
-
-enum py_ssl_server_or_client {
-    PY_SSL_CLIENT,
-    PY_SSL_SERVER
-};
-
-enum py_ssl_cert_requirements {
-    PY_SSL_CERT_NONE,
-    PY_SSL_CERT_OPTIONAL,
-    PY_SSL_CERT_REQUIRED
-};
-
-enum py_ssl_version {
-    PY_SSL_VERSION_SSL2,
-    PY_SSL_VERSION_SSL3=1,
-    PY_SSL_VERSION_SSL23,
-#if HAVE_TLSv1_2
-    PY_SSL_VERSION_TLS1,
-    PY_SSL_VERSION_TLS1_1,
-    PY_SSL_VERSION_TLS1_2
-#else
-    PY_SSL_VERSION_TLS1
-#endif
-};
-
-#ifdef WITH_THREAD
-
-/* serves as a flag to see whether we've initialized the SSL thread support. */
-/* 0 means no, greater than 0 means yes */
-
-static unsigned int _ssl_locks_count = 0;
-
-#endif /* def WITH_THREAD */
-
-/* SSL socket object */
-
-#define X509_NAME_MAXLEN 256
-
-/* SSL_CTX_clear_options() and SSL_clear_options() were first added in
- * OpenSSL 0.9.8m but do not appear in some 0.9.9-dev versions such the
- * 0.9.9 from "May 2008" that NetBSD 5.0 uses. */
-#if OPENSSL_VERSION_NUMBER >= 0x009080dfL && OPENSSL_VERSION_NUMBER != 0x00909000L
-# define HAVE_SSL_CTX_CLEAR_OPTIONS
-#else
-# undef HAVE_SSL_CTX_CLEAR_OPTIONS
-#endif
-
-/* In case of 'tls-unique' it will be 12 bytes for TLS, 36 bytes for
- * older SSL, but let's be safe */
-#define PySSL_CB_MAXLEN 128
-
-
-typedef struct {
-    PyObject_HEAD
-    SSL_CTX *ctx;
-#ifdef OPENSSL_NPN_NEGOTIATED
-    unsigned char *npn_protocols;
-    int npn_protocols_len;
-#endif
-#ifdef HAVE_ALPN
-    unsigned char *alpn_protocols;
-    int alpn_protocols_len;
-#endif
-#ifndef OPENSSL_NO_TLSEXT
-    PyObject *set_hostname;
-#endif
-    int check_hostname;
-} PySSLContext;
-
-typedef struct {
-    PyObject_HEAD
-    PyObject *Socket; /* weakref to socket on which we're layered */
-    SSL *ssl;
-    PySSLContext *ctx; /* weakref to SSL context */
-    X509 *peer_cert;
-    char shutdown_seen_zero;
-    char handshake_done;
-    enum py_ssl_server_or_client socket_type;
-    PyObject *owner; /* Python level "owner" passed to servername callback */
-    PyObject *server_hostname;
-} PySSLSocket;
-
-typedef struct {
-    PyObject_HEAD
-    BIO *bio;
-    int eof_written;
-} PySSLMemoryBIO;
-
-static PyTypeObject PySSLContext_Type;
-static PyTypeObject PySSLSocket_Type;
-static PyTypeObject PySSLMemoryBIO_Type;
-
-static PyObject *PySSL_SSLwrite(PySSLSocket *self, PyObject *args);
-static PyObject *PySSL_SSLread(PySSLSocket *self, PyObject *args);
-static int PySSL_select(PySocketSockObject *s, int writing, _PyTime_t timeout);
-static PyObject *PySSL_peercert(PySSLSocket *self, PyObject *args);
-static PyObject *PySSL_cipher(PySSLSocket *self);
-
-#define PySSLContext_Check(v)   (Py_TYPE(v) == &PySSLContext_Type)
-#define PySSLSocket_Check(v)    (Py_TYPE(v) == &PySSLSocket_Type)
-#define PySSLMemoryBIO_Check(v)    (Py_TYPE(v) == &PySSLMemoryBIO_Type)
-
-typedef enum {
-    SOCKET_IS_NONBLOCKING,
-    SOCKET_IS_BLOCKING,
-    SOCKET_HAS_TIMED_OUT,
-    SOCKET_HAS_BEEN_CLOSED,
-    SOCKET_TOO_LARGE_FOR_SELECT,
-    SOCKET_OPERATION_OK
-} timeout_state;
-
-/* Wrap error strings with filename and line # */
-#define ERRSTR1(x,y,z) (x ":" y ": " z)
-#define ERRSTR(x) ERRSTR1("_ssl.c", Py_STRINGIFY(__LINE__), x)
-
-/* Get the socket from a PySSLSocket, if it has one */
-#define GET_SOCKET(obj) ((obj)->Socket ? \
-    (PySocketSockObject *) PyWeakref_GetObject((obj)->Socket) : NULL)
-
-/* If sock is NULL, use a timeout of 0 second */
-#define GET_SOCKET_TIMEOUT(sock) \
-    ((sock != NULL) ? (sock)->sock_timeout : 0)
-
-/*
- * SSL errors.
- */
-
-PyDoc_STRVAR(SSLError_doc,
-"An error occurred in the SSL implementation.");
-
-PyDoc_STRVAR(SSLZeroReturnError_doc,
-"SSL/TLS session closed cleanly.");
-
-PyDoc_STRVAR(SSLWantReadError_doc,
-"Non-blocking SSL socket needs to read more data\n"
-"before the requested operation can be completed.");
-
-PyDoc_STRVAR(SSLWantWriteError_doc,
-"Non-blocking SSL socket needs to write more data\n"
-"before the requested operation can be completed.");
-
-PyDoc_STRVAR(SSLSyscallError_doc,
-"System error when attempting SSL operation.");
-
-PyDoc_STRVAR(SSLEOFError_doc,
-"SSL/TLS connection terminated abruptly.");
+#define _SSL__SSLSOCKET_DO_HANDSHAKE_METHODDEF    \
+    {"do_handshake", (PyCFunction)_ssl__SSLSocket_do_handshake, METH_NOARGS, _ssl__SSLSocket_do_handshake__doc__},
 
 static PyObject *
-SSLError_str(PyOSErrorObject *self)
+_ssl__SSLSocket_do_handshake_impl(PySSLSocket *self);
+
+static PyObject *
+_ssl__SSLSocket_do_handshake(PySSLSocket *self, PyObject *Py_UNUSED(ignored))
 {
-    if (self->strerror != NULL && PyUnicode_Check(self->strerror)) {
-        Py_INCREF(self->strerror);
-        return self->strerror;
-    }
-    else
-        return PyObject_Str(self->args);
+    return _ssl__SSLSocket_do_handshake_impl(self);
 }
 
-static PyType_Slot sslerror_type_slots[] = {
-    {Py_tp_base, NULL},  /* Filled out in module init as it's not a constant */
-    {Py_tp_doc, SSLError_doc},
-    {Py_tp_str, SSLError_str},
-    {0, 0},
-};
+PyDoc_STRVAR(_ssl__test_decode_cert__doc__,
+"_test_decode_cert($module, path, /)\n"
+"--\n"
+"\n");
 
-static PyType_Spec sslerror_type_spec = {
-    "ssl.SSLError",
-    sizeof(PyOSErrorObject),
-    0,
-    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
-    sslerror_type_slots
-};
+#define _SSL__TEST_DECODE_CERT_METHODDEF    \
+    {"_test_decode_cert", (PyCFunction)_ssl__test_decode_cert, METH_O, _ssl__test_decode_cert__doc__},
 
-static void
-fill_and_set_sslerror(PyObject *type, int ssl_errno, const char *errstr,
-                      int lineno, unsigned long errcode)
+static PyObject *
+_ssl__test_decode_cert_impl(PyModuleDef *module, PyObject *path);
+
+static PyObject *
+_ssl__test_decode_cert(PyModuleDef *module, PyObject *arg)
 {
-    PyObject *err_value = NULL, *reason_obj = NULL, *lib_obj = NULL;
-    PyObject *init_value, *msg, *key;
-    _Py_IDENTIFIER(reason);
-    _Py_IDENTIFIER(library);
+    PyObject *return_value = NULL;
+    PyObject *path;
 
-    if (errcode != 0) {
-        int lib, reason;
+    if (!PyArg_Parse(arg, "O&:_test_decode_cert", PyUnicode_FSConverter, &path))
+        goto exit;
+    return_value = _ssl__test_decode_cert_impl(module, path);
 
-        lib = ERR_GET_LIB(errcode);
-        reason = ERR_GET_REASON(errcode);
-        key = Py_BuildValue("ii", lib, reason);
-        if (key == NULL)
-            goto fail;
-        reason_obj = PyDict_GetItem(err_codes_to_names, key);
-        Py_DECREF(key);
-        if (reason_obj == NULL) {
-            /* XXX if reason < 100, it might reflect a library number (!!) */
-            PyErr_Clear();
-        }
-        key = PyLong_FromLong(lib);
-        if (key == NULL)
-            goto fail;
-        lib_obj = PyDict_GetItem(lib_codes_to_names, key);
-        Py_DECREF(key);
-        if (lib_obj == NULL) {
-            PyErr_Clear();
-        }
-        if (errstr == NULL)
-            errstr = ERR_reason_error_string(errcode);
+exit:
+    return return_value;
+}
+
+PyDoc_STRVAR(_ssl__SSLSocket_peer_certificate__doc__,
+"peer_certificate($self, der=False, /)\n"
+"--\n"
+"\n"
+"Returns the certificate for the peer.\n"
+"\n"
+"If no certificate was provided, returns None.  If a certificate was\n"
+"provided, but not validated, returns an empty dictionary.  Otherwise\n"
+"returns a dict containing information about the peer certificate.\n"
+"\n"
+"If the optional argument is True, returns a DER-encoded copy of the\n"
+"peer certificate, or None if no certificate was provided.  This will\n"
+"return the certificate even if it wasn\'t validated.");
+
+#define _SSL__SSLSOCKET_PEER_CERTIFICATE_METHODDEF    \
+    {"peer_certificate", (PyCFunction)_ssl__SSLSocket_peer_certificate, METH_VARARGS, _ssl__SSLSocket_peer_certificate__doc__},
+
+static PyObject *
+_ssl__SSLSocket_peer_certificate_impl(PySSLSocket *self, int binary_mode);
+
+static PyObject *
+_ssl__SSLSocket_peer_certificate(PySSLSocket *self, PyObject *args)
+{
+    PyObject *return_value = NULL;
+    int binary_mode = 0;
+
+    if (!PyArg_ParseTuple(args, "|p:peer_certificate",
+        &binary_mode))
+        goto exit;
+    return_value = _ssl__SSLSocket_peer_certificate_impl(self, binary_mode);
+
+exit:
+    return return_value;
+}
+
+PyDoc_STRVAR(_ssl__SSLSocket_shared_ciphers__doc__,
+"shared_ciphers($self, /)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLSOCKET_SHARED_CIPHERS_METHODDEF    \
+    {"shared_ciphers", (PyCFunction)_ssl__SSLSocket_shared_ciphers, METH_NOARGS, _ssl__SSLSocket_shared_ciphers__doc__},
+
+static PyObject *
+_ssl__SSLSocket_shared_ciphers_impl(PySSLSocket *self);
+
+static PyObject *
+_ssl__SSLSocket_shared_ciphers(PySSLSocket *self, PyObject *Py_UNUSED(ignored))
+{
+    return _ssl__SSLSocket_shared_ciphers_impl(self);
+}
+
+PyDoc_STRVAR(_ssl__SSLSocket_cipher__doc__,
+"cipher($self, /)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLSOCKET_CIPHER_METHODDEF    \
+    {"cipher", (PyCFunction)_ssl__SSLSocket_cipher, METH_NOARGS, _ssl__SSLSocket_cipher__doc__},
+
+static PyObject *
+_ssl__SSLSocket_cipher_impl(PySSLSocket *self);
+
+static PyObject *
+_ssl__SSLSocket_cipher(PySSLSocket *self, PyObject *Py_UNUSED(ignored))
+{
+    return _ssl__SSLSocket_cipher_impl(self);
+}
+
+PyDoc_STRVAR(_ssl__SSLSocket_version__doc__,
+"version($self, /)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLSOCKET_VERSION_METHODDEF    \
+    {"version", (PyCFunction)_ssl__SSLSocket_version, METH_NOARGS, _ssl__SSLSocket_version__doc__},
+
+static PyObject *
+_ssl__SSLSocket_version_impl(PySSLSocket *self);
+
+static PyObject *
+_ssl__SSLSocket_version(PySSLSocket *self, PyObject *Py_UNUSED(ignored))
+{
+    return _ssl__SSLSocket_version_impl(self);
+}
+
+#if defined(OPENSSL_NPN_NEGOTIATED)
+
+PyDoc_STRVAR(_ssl__SSLSocket_selected_npn_protocol__doc__,
+"selected_npn_protocol($self, /)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLSOCKET_SELECTED_NPN_PROTOCOL_METHODDEF    \
+    {"selected_npn_protocol", (PyCFunction)_ssl__SSLSocket_selected_npn_protocol, METH_NOARGS, _ssl__SSLSocket_selected_npn_protocol__doc__},
+
+static PyObject *
+_ssl__SSLSocket_selected_npn_protocol_impl(PySSLSocket *self);
+
+static PyObject *
+_ssl__SSLSocket_selected_npn_protocol(PySSLSocket *self, PyObject *Py_UNUSED(ignored))
+{
+    return _ssl__SSLSocket_selected_npn_protocol_impl(self);
+}
+
+#endif /* defined(OPENSSL_NPN_NEGOTIATED) */
+
+#if defined(HAVE_ALPN)
+
+PyDoc_STRVAR(_ssl__SSLSocket_selected_alpn_protocol__doc__,
+"selected_alpn_protocol($self, /)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLSOCKET_SELECTED_ALPN_PROTOCOL_METHODDEF    \
+    {"selected_alpn_protocol", (PyCFunction)_ssl__SSLSocket_selected_alpn_protocol, METH_NOARGS, _ssl__SSLSocket_selected_alpn_protocol__doc__},
+
+static PyObject *
+_ssl__SSLSocket_selected_alpn_protocol_impl(PySSLSocket *self);
+
+static PyObject *
+_ssl__SSLSocket_selected_alpn_protocol(PySSLSocket *self, PyObject *Py_UNUSED(ignored))
+{
+    return _ssl__SSLSocket_selected_alpn_protocol_impl(self);
+}
+
+#endif /* defined(HAVE_ALPN) */
+
+PyDoc_STRVAR(_ssl__SSLSocket_compression__doc__,
+"compression($self, /)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLSOCKET_COMPRESSION_METHODDEF    \
+    {"compression", (PyCFunction)_ssl__SSLSocket_compression, METH_NOARGS, _ssl__SSLSocket_compression__doc__},
+
+static PyObject *
+_ssl__SSLSocket_compression_impl(PySSLSocket *self);
+
+static PyObject *
+_ssl__SSLSocket_compression(PySSLSocket *self, PyObject *Py_UNUSED(ignored))
+{
+    return _ssl__SSLSocket_compression_impl(self);
+}
+
+PyDoc_STRVAR(_ssl__SSLSocket_write__doc__,
+"write($self, b, /)\n"
+"--\n"
+"\n"
+"Writes the bytes-like object b into the SSL object.\n"
+"\n"
+"Returns the number of bytes written.");
+
+#define _SSL__SSLSOCKET_WRITE_METHODDEF    \
+    {"write", (PyCFunction)_ssl__SSLSocket_write, METH_O, _ssl__SSLSocket_write__doc__},
+
+static PyObject *
+_ssl__SSLSocket_write_impl(PySSLSocket *self, Py_buffer *b);
+
+static PyObject *
+_ssl__SSLSocket_write(PySSLSocket *self, PyObject *arg)
+{
+    PyObject *return_value = NULL;
+    Py_buffer b = {NULL, NULL};
+
+    if (!PyArg_Parse(arg, "y*:write", &b))
+        goto exit;
+    return_value = _ssl__SSLSocket_write_impl(self, &b);
+
+exit:
+    /* Cleanup for b */
+    if (b.obj)
+       PyBuffer_Release(&b);
+
+    return return_value;
+}
+
+PyDoc_STRVAR(_ssl__SSLSocket_pending__doc__,
+"pending($self, /)\n"
+"--\n"
+"\n"
+"Returns the number of already decrypted bytes available for read, pending on the connection.");
+
+#define _SSL__SSLSOCKET_PENDING_METHODDEF    \
+    {"pending", (PyCFunction)_ssl__SSLSocket_pending, METH_NOARGS, _ssl__SSLSocket_pending__doc__},
+
+static PyObject *
+_ssl__SSLSocket_pending_impl(PySSLSocket *self);
+
+static PyObject *
+_ssl__SSLSocket_pending(PySSLSocket *self, PyObject *Py_UNUSED(ignored))
+{
+    return _ssl__SSLSocket_pending_impl(self);
+}
+
+PyDoc_STRVAR(_ssl__SSLSocket_read__doc__,
+"read(size, [buffer])\n"
+"Read up to size bytes from the SSL socket.");
+
+#define _SSL__SSLSOCKET_READ_METHODDEF    \
+    {"read", (PyCFunction)_ssl__SSLSocket_read, METH_VARARGS, _ssl__SSLSocket_read__doc__},
+
+static PyObject *
+_ssl__SSLSocket_read_impl(PySSLSocket *self, int len, int group_right_1,
+                          Py_buffer *buffer);
+
+static PyObject *
+_ssl__SSLSocket_read(PySSLSocket *self, PyObject *args)
+{
+    PyObject *return_value = NULL;
+    int len;
+    int group_right_1 = 0;
+    Py_buffer buffer = {NULL, NULL};
+
+    switch (PyTuple_GET_SIZE(args)) {
+        case 1:
+            if (!PyArg_ParseTuple(args, "i:read", &len))
+                goto exit;
+            break;
+        case 2:
+            if (!PyArg_ParseTuple(args, "iw*:read", &len, &buffer))
+                goto exit;
+            group_right_1 = 1;
+            break;
+        default:
+            PyErr_SetString(PyExc_TypeError, "_ssl._SSLSocket.read requires 1 to 2 arguments");
+            goto exit;
     }
-    if (errstr == NULL)
-        errstr = "unknown error";
+    return_value = _ssl__SSLSocket_read_impl(self, len, group_right_1, &buffer);
 
-    if (reason_obj && lib_obj)
-        msg = PyUnicode_FromFormat("[%S: %S] %s (_ssl.c:%d)",
-                                   lib_obj, reason_obj, errstr, lineno);
-    else if (lib_obj)
-        msg = PyUnicode_FromFormat("[%S] %s (_ssl.c:%d)",
-                                   lib_obj, errstr, lineno);
-    else
-        msg = PyUnicode_FromFormat("%s (_ssl.c:%d)", errstr, lineno);
-    if (msg == NULL)
-        goto fail;
+exit:
+    /* Cleanup for buffer */
+    if (buffer.obj)
+       PyBuffer_Release(&buffer);
 
-    init_value = Py_BuildValue("iN", ssl_errno, msg);
-    if (init_value == NULL)
-        goto fail;
+    return return_value;
+}
 
-    err_value = PyObject_CallObject(type, init_value);
-    Py_DECREF(init_value);
-    if (err_value == NULL)
-        goto fail;
+PyDoc_STRVAR(_ssl__SSLSocket_shutdown__doc__,
+"shutdown($self, /)\n"
+"--\n"
+"\n"
+"Does the SSL shutdown handshake with the remote end.\n"
+"\n"
+"Returns the underlying socket object.");
 
-    if (reason_obj == NULL)
-        reason_obj = Py_None;
-    if (_PyObject_SetAttrId(err_value, &PyId_reason, reason_obj))
-        goto fail;
-    if (lib_obj == NULL)
-        lib_obj = Py_None;
-    if (_PyObject_SetAttrId(err_value, &PyId_library, lib_obj))
-        goto fail;
-    PyErr_SetObject(type, err_value);
-fail:
-    Py_XDECREF(err_value);
+#define _SSL__SSLSOCKET_SHUTDOWN_METHODDEF    \
+    {"shutdown", (PyCFunction)_ssl__SSLSocket_shutdown, METH_NOARGS, _ssl__SSLSocket_shutdown__doc__},
+
+static PyObject *
+_ssl__SSLSocket_shutdown_impl(PySSLSocket *self);
+
+static PyObject *
+_ssl__SSLSocket_shutdown(PySSLSocket *self, PyObject *Py_UNUSED(ignored))
+{
+    return _ssl__SSLSocket_shutdown_impl(self);
+}
+
+PyDoc_STRVAR(_ssl__SSLSocket_tls_unique_cb__doc__,
+"tls_unique_cb($self, /)\n"
+"--\n"
+"\n"
+"Returns the \'tls-unique\' channel binding data, as defined by RFC 5929.\n"
+"\n"
+"If the TLS handshake is not yet complete, None is returned.");
+
+#define _SSL__SSLSOCKET_TLS_UNIQUE_CB_METHODDEF    \
+    {"tls_unique_cb", (PyCFunction)_ssl__SSLSocket_tls_unique_cb, METH_NOARGS, _ssl__SSLSocket_tls_unique_cb__doc__},
+
+static PyObject *
+_ssl__SSLSocket_tls_unique_cb_impl(PySSLSocket *self);
+
+static PyObject *
+_ssl__SSLSocket_tls_unique_cb(PySSLSocket *self, PyObject *Py_UNUSED(ignored))
+{
+    return _ssl__SSLSocket_tls_unique_cb_impl(self);
 }
 
 static PyObject *
-PySSL_SetError(PySSLSocket *obj, int ret, char *filename, int lineno)
+_ssl__SSLContext_impl(PyTypeObject *type, int proto_version);
+
+static PyObject *
+_ssl__SSLContext(PyTypeObject *type, PyObject *args, PyObject *kwargs)
 {
-    PyObject *type = PySSLErrorObject;
-    char *errstr = NULL;
-    int err;
-    enum py_ssl_error p = PY_SSL_ERROR_NONE;
-    unsigned long e = 0;
+    PyObject *return_value = NULL;
+    int proto_version;
 
-    assert(ret <= 0);
-    e = ERR_peek_last_error();
+    if ((type == &PySSLContext_Type) &&
+        !_PyArg_NoKeywords("_SSLContext", kwargs))
+        goto exit;
+    if (!PyArg_ParseTuple(args, "i:_SSLContext",
+        &proto_version))
+        goto exit;
+    return_value = _ssl__SSLContext_impl(type, proto_version);
 
-    if (obj->ssl != NULL) {
-        err = SSL_get_error(obj->ssl, ret);
+exit:
+    return return_value;
+}
 
-        switch (err) {
-        case SSL_ERROR_ZERO_RETURN:
-            errstr = "TLS/SSL connection has been closed (EOF)";
-            type = PySSLZeroReturnErrorObject;
-            p = PY_SSL_ERROR_ZERO_RETURN;
-            break;
-        case SSL_ERROR_WANT_READ:
-            errstr = "The operation did not complete (read)";
-            type = PySSLWantReadErrorObject;
-            p = PY_SSL_ERROR_WANT_READ;
-            break;
-        case SSL_ERROR_WANT_WRITE:
-            p = PY_SSL_ERROR_WANT_WRITE;
-            type = PySSLWantWriteErrorObject;
-            errstr = "The operation did not complete (write)";
-            break;
-        case SSL_ERROR_WANT_X509_LOOKUP:
-            p = PY_SSL_ERROR_WANT_X509_LOOKUP;
-            errstr = "The operation did not complete (X509 lookup)";
-            break;
-        case SSL_ERROR_WANT_CONNECT:
-            p = PY_SSL_ERROR_WANT_CONNECT;
-            errstr = "The operation did not complete (connect)";
-            break;
-        case SSL_ERROR_SYSCALL:
-        {
-            if (e == 0) {
-                PySocketSockObject *s = GET_SOCKET(obj);
-                if (ret == 0 || (((PyObject *)s) == Py_None)) {
-                    p = PY_SSL_ERROR_EOF;
-                    type = PySSLEOFErrorObject;
-                    errstr = "EOF occurred in violation of protocol";
-                } else if (s && ret == -1) {
-                    /* underlying BIO reported an I/O error */
-                    Py_INCREF(s);
-                    ERR_clear_error();
-                    s->errorhandler();
-                    Py_DECREF(s);
-                    return NULL;
-                } else { /* possible? */
-                    p = PY_SSL_ERROR_SYSCALL;
-                    type = PySSLSyscallErrorObject;
-                    errstr = "Some I/O error occurred";
-                }
-            } else {
-                p = PY_SSL_ERROR_SYSCALL;
-            }
-            break;
-        }
-        case SSL_ERROR_SSL:
-        {
-            p = PY_SSL_ERROR_SSL;
-            if (e == 0)
-                /* possible? */
-                errstr = "A failure in the SSL library occurred";
-            break;
-        }
-        default:
-            p = PY_SSL_ERROR_INVALID_ERROR_CODE;
-            errstr = "Invalid error code";
-        }
-    }
-    fill_and_set_sslerror(type, p, errstr, lineno, e);
-    ERR_clear_error();
-    return NULL;
+PyDoc_STRVAR(_ssl__SSLContext_set_ciphers__doc__,
+"set_ciphers($self, cipherlist, /)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLCONTEXT_SET_CIPHERS_METHODDEF    \
+    {"set_ciphers", (PyCFunction)_ssl__SSLContext_set_ciphers, METH_O, _ssl__SSLContext_set_ciphers__doc__},
+
+static PyObject *
+_ssl__SSLContext_set_ciphers_impl(PySSLContext *self, const char *cipherlist);
+
+static PyObject *
+_ssl__SSLContext_set_ciphers(PySSLContext *self, PyObject *arg)
+{
+    PyObject *return_value = NULL;
+    const char *cipherlist;
+
+    if (!PyArg_Parse(arg, "s:set_ciphers", &cipherlist))
+        goto exit;
+    return_value = _ssl__SSLContext_set_ciphers_impl(self, cipherlist);
+
+exit:
+    return return_value;
+}
+
+PyDoc_STRVAR(_ssl__SSLContext__set_npn_protocols__doc__,
+"_set_npn_protocols($self, protos, /)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLCONTEXT__SET_NPN_PROTOCOLS_METHODDEF    \
+    {"_set_npn_protocols", (PyCFunction)_ssl__SSLContext__set_npn_protocols, METH_O, _ssl__SSLContext__set_npn_protocols__doc__},
+
+static PyObject *
+_ssl__SSLContext__set_npn_protocols_impl(PySSLContext *self,
+                                         Py_buffer *protos);
+
+static PyObject *
+_ssl__SSLContext__set_npn_protocols(PySSLContext *self, PyObject *arg)
+{
+    PyObject *return_value = NULL;
+    Py_buffer protos = {NULL, NULL};
+
+    if (!PyArg_Parse(arg, "y*:_set_npn_protocols", &protos))
+        goto exit;
+    return_value = _ssl__SSLContext__set_npn_protocols_impl(self, &protos);
+
+exit:
+    /* Cleanup for protos */
+    if (protos.obj)
+       PyBuffer_Release(&protos);
+
+    return return_value;
+}
+
+PyDoc_STRVAR(_ssl__SSLContext__set_alpn_protocols__doc__,
+"_set_alpn_protocols($self, protos, /)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLCONTEXT__SET_ALPN_PROTOCOLS_METHODDEF    \
+    {"_set_alpn_protocols", (PyCFunction)_ssl__SSLContext__set_alpn_protocols, METH_O, _ssl__SSLContext__set_alpn_protocols__doc__},
+
+static PyObject *
+_ssl__SSLContext__set_alpn_protocols_impl(PySSLContext *self,
+                                          Py_buffer *protos);
+
+static PyObject *
+_ssl__SSLContext__set_alpn_protocols(PySSLContext *self, PyObject *arg)
+{
+    PyObject *return_value = NULL;
+    Py_buffer protos = {NULL, NULL};
+
+    if (!PyArg_Parse(arg, "y*:_set_alpn_protocols", &protos))
+        goto exit;
+    return_value = _ssl__SSLContext__set_alpn_protocols_impl(self, &protos);
+
+exit:
+    /* Cleanup for protos */
+    if (protos.obj)
+       PyBuffer_Release(&protos);
+
+    return return_value;
+}
+
+PyDoc_STRVAR(_ssl__SSLContext_load_cert_chain__doc__,
+"load_cert_chain($self, /, certfile, keyfile=None, password=None)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLCONTEXT_LOAD_CERT_CHAIN_METHODDEF    \
+    {"load_cert_chain", (PyCFunction)_ssl__SSLContext_load_cert_chain, METH_VARARGS|METH_KEYWORDS, _ssl__SSLContext_load_cert_chain__doc__},
+
+static PyObject *
+_ssl__SSLContext_load_cert_chain_impl(PySSLContext *self, PyObject *certfile,
+                                      PyObject *keyfile, PyObject *password);
+
+static PyObject *
+_ssl__SSLContext_load_cert_chain(PySSLContext *self, PyObject *args, PyObject *kwargs)
+{
+    PyObject *return_value = NULL;
+    static char *_keywords[] = {"certfile", "keyfile", "password", NULL};
+    PyObject *certfile;
+    PyObject *keyfile = NULL;
+    PyObject *password = NULL;
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|OO:load_cert_chain", _keywords,
+        &certfile, &keyfile, &password))
+        goto exit;
+    return_value = _ssl__SSLContext_load_cert_chain_impl(self, certfile, keyfile, password);
+
+exit:
+    return return_value;
+}
+
+PyDoc_STRVAR(_ssl__SSLContext_load_verify_locations__doc__,
+"load_verify_locations($self, /, cafile=None, capath=None, cadata=None)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLCONTEXT_LOAD_VERIFY_LOCATIONS_METHODDEF    \
+    {"load_verify_locations", (PyCFunction)_ssl__SSLContext_load_verify_locations, METH_VARARGS|METH_KEYWORDS, _ssl__SSLContext_load_verify_locations__doc__},
+
+static PyObject *
+_ssl__SSLContext_load_verify_locations_impl(PySSLContext *self,
+                                            PyObject *cafile,
+                                            PyObject *capath,
+                                            PyObject *cadata);
+
+static PyObject *
+_ssl__SSLContext_load_verify_locations(PySSLContext *self, PyObject *args, PyObject *kwargs)
+{
+    PyObject *return_value = NULL;
+    static char *_keywords[] = {"cafile", "capath", "cadata", NULL};
+    PyObject *cafile = NULL;
+    PyObject *capath = NULL;
+    PyObject *cadata = NULL;
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|OOO:load_verify_locations", _keywords,
+        &cafile, &capath, &cadata))
+        goto exit;
+    return_value = _ssl__SSLContext_load_verify_locations_impl(self, cafile, capath, cadata);
+
+exit:
+    return return_value;
+}
+
+PyDoc_STRVAR(_ssl__SSLContext_load_dh_params__doc__,
+"load_dh_params($self, path, /)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLCONTEXT_LOAD_DH_PARAMS_METHODDEF    \
+    {"load_dh_params", (PyCFunction)_ssl__SSLContext_load_dh_params, METH_O, _ssl__SSLContext_load_dh_params__doc__},
+
+PyDoc_STRVAR(_ssl__SSLContext__wrap_socket__doc__,
+"_wrap_socket($self, /, sock, server_side, server_hostname=None)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLCONTEXT__WRAP_SOCKET_METHODDEF    \
+    {"_wrap_socket", (PyCFunction)_ssl__SSLContext__wrap_socket, METH_VARARGS|METH_KEYWORDS, _ssl__SSLContext__wrap_socket__doc__},
+
+static PyObject *
+_ssl__SSLContext__wrap_socket_impl(PySSLContext *self, PyObject *sock,
+                                   int server_side, PyObject *hostname_obj);
+
+static PyObject *
+_ssl__SSLContext__wrap_socket(PySSLContext *self, PyObject *args, PyObject *kwargs)
+{
+    PyObject *return_value = NULL;
+    static char *_keywords[] = {"sock", "server_side", "server_hostname", NULL};
+    PyObject *sock;
+    int server_side;
+    PyObject *hostname_obj = Py_None;
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O!i|O:_wrap_socket", _keywords,
+        PySocketModule.Sock_Type, &sock, &server_side, &hostname_obj))
+        goto exit;
+    return_value = _ssl__SSLContext__wrap_socket_impl(self, sock, server_side, hostname_obj);
+
+exit:
+    return return_value;
+}
+
+PyDoc_STRVAR(_ssl__SSLContext__wrap_bio__doc__,
+"_wrap_bio($self, /, incoming, outgoing, server_side,\n"
+"          server_hostname=None)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLCONTEXT__WRAP_BIO_METHODDEF    \
+    {"_wrap_bio", (PyCFunction)_ssl__SSLContext__wrap_bio, METH_VARARGS|METH_KEYWORDS, _ssl__SSLContext__wrap_bio__doc__},
+
+static PyObject *
+_ssl__SSLContext__wrap_bio_impl(PySSLContext *self, PySSLMemoryBIO *incoming,
+                                PySSLMemoryBIO *outgoing, int server_side,
+                                PyObject *hostname_obj);
+
+static PyObject *
+_ssl__SSLContext__wrap_bio(PySSLContext *self, PyObject *args, PyObject *kwargs)
+{
+    PyObject *return_value = NULL;
+    static char *_keywords[] = {"incoming", "outgoing", "server_side", "server_hostname", NULL};
+    PySSLMemoryBIO *incoming;
+    PySSLMemoryBIO *outgoing;
+    int server_side;
+    PyObject *hostname_obj = Py_None;
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O!O!i|O:_wrap_bio", _keywords,
+        &PySSLMemoryBIO_Type, &incoming, &PySSLMemoryBIO_Type, &outgoing, &server_side, &hostname_obj))
+        goto exit;
+    return_value = _ssl__SSLContext__wrap_bio_impl(self, incoming, outgoing, server_side, hostname_obj);
+
+exit:
+    return return_value;
+}
+
+PyDoc_STRVAR(_ssl__SSLContext_session_stats__doc__,
+"session_stats($self, /)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLCONTEXT_SESSION_STATS_METHODDEF    \
+    {"session_stats", (PyCFunction)_ssl__SSLContext_session_stats, METH_NOARGS, _ssl__SSLContext_session_stats__doc__},
+
+static PyObject *
+_ssl__SSLContext_session_stats_impl(PySSLContext *self);
+
+static PyObject *
+_ssl__SSLContext_session_stats(PySSLContext *self, PyObject *Py_UNUSED(ignored))
+{
+    return _ssl__SSLContext_session_stats_impl(self);
+}
+
+PyDoc_STRVAR(_ssl__SSLContext_set_default_verify_paths__doc__,
+"set_default_verify_paths($self, /)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLCONTEXT_SET_DEFAULT_VERIFY_PATHS_METHODDEF    \
+    {"set_default_verify_paths", (PyCFunction)_ssl__SSLContext_set_default_verify_paths, METH_NOARGS, _ssl__SSLContext_set_default_verify_paths__doc__},
+
+static PyObject *
+_ssl__SSLContext_set_default_verify_paths_impl(PySSLContext *self);
+
+static PyObject *
+_ssl__SSLContext_set_default_verify_paths(PySSLContext *self, PyObject *Py_UNUSED(ignored))
+{
+    return _ssl__SSLContext_set_default_verify_paths_impl(self);
+}
+
+#if !defined(OPENSSL_NO_ECDH)
+
+PyDoc_STRVAR(_ssl__SSLContext_set_ecdh_curve__doc__,
+"set_ecdh_curve($self, name, /)\n"
+"--\n"
+"\n");
+
+#define _SSL__SSLCONTEXT_SET_ECDH_CURVE_METHODDEF    \
+    {"set_ecdh_curve", (PyCFunction)_ssl__SSLContext_set_ecdh_curve, METH_O, _ssl__SSLContext_set_ecdh_curve__doc__},
+
+#endif /* !defined(OPENSSL_NO_ECDH) */
+
+PyDoc_STRVAR(_ssl__SSLContext_set_servername_callback__doc__,
+"set_servername_callback($self, method, /)\n"
+"--\n"
+"\n"
+"Set a callback that will be called when a server name is provided by the SSL/TLS client in the SNI extension.\n"
+"\n"
+"If the argument is None then the callback is disabled. The method is called\n"
+"with the SSLSocket, the server name as a string, and the SSLContext object.\n"
+"See RFC 6066 for details of the SNI extension.");
+
+#define _SSL__SSLCONTEXT_SET_SERVERNAME_CALLBACK_METHODDEF    \
+    {"set_servername_callback", (PyCFunction)_ssl__SSLContext_set_servername_callback, METH_O, _ssl__SSLContext_set_servername_callback__doc__},
+
+PyDoc_STRVAR(_ssl__SSLContext_cert_store_stats__doc__,
+"cert_store_stats($self, /)\n"
+"--\n"
+"\n"
+"Returns quantities of loaded X.509 certificates.\n"
+"\n"
+"X.509 certificates with a CA extension and certificate revocation lists\n"
+"inside the context\'s cert store.\n"
+"\n"
+"NOTE: Certificates in a capath directory aren\'t loaded unless they have\n"
+"been used at least once.");
+
+#define _SSL__SSLCONTEXT_CERT_STORE_STATS_METHODDEF    \
+    {"cert_store_stats", (PyCFunction)_ssl__SSLContext_cert_store_stats, METH_NOARGS, _ssl__SSLContext_cert_store_stats__doc__},
+
+static PyObject *
+_ssl__SSLContext_cert_store_stats_impl(PySSLContext *self);
+
+static PyObject *
+_ssl__SSLContext_cert_store_stats(PySSLContext *self, PyObject *Py_UNUSED(ignored))
+{
+    return _ssl__SSLContext_cert_store_stats_impl(self);
+}
+
+PyDoc_STRVAR(_ssl__SSLContext_get_ca_certs__doc__,
+"get_ca_certs($self, /, binary_form=False)\n"
+"--\n"
+"\n"
+"Returns a list of dicts with information of loaded CA certs.\n"
+"\n"
+"If the optional argument is True, returns a DER-encoded copy of the CA\n"
+"certificate.\n"
+"\n"
+"NOTE: Certificates in a capath directory aren\'t loaded unless they have\n"
+"been used at least once.");
+
+#define _SSL__SSLCONTEXT_GET_CA_CERTS_METHODDEF    \
+    {"get_ca_certs", (PyCFunction)_ssl__SSLContext_get_ca_certs, METH_VARARGS|METH_KEYWORDS, _ssl__SSLContext_get_ca_certs__doc__},
+
+static PyObject *
+_ssl__SSLContext_get_ca_certs_impl(PySSLContext *self, int binary_form);
+
+static PyObject *
+_ssl__SSLContext_get_ca_certs(PySSLContext *self, PyObject *args, PyObject *kwargs)
+{
+    PyObject *return_value = NULL;
+    static char *_keywords[] = {"binary_form", NULL};
+    int binary_form = 0;
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|p:get_ca_certs", _keywords,
+        &binary_form))
+        goto exit;
+    return_value = _ssl__SSLContext_get_ca_certs_impl(self, binary_form);
+
+exit:
+    return return_value;
 }
 
 static PyObject *
-_setSSLError (char *errstr, int errcode, char *filename, int lineno) {
+_ssl_MemoryBIO_impl(PyTypeObject *type);
 
-    if (errstr == NULL)
-        errcode = ERR_peek_last_error();
-    else
-        errcode = 0;
-    fill_and_set_sslerror(PySSLErrorObject, errcode, errstr, lineno, errcode);
-    ERR_clear_error();
-    return NULL;
+static PyObject *
+_ssl_MemoryBIO(PyTypeObject *type, PyObject *args, PyObject *kwargs)
+{
+    PyObject *return_value = NULL;
+
+    if ((type == &PySSLMemoryBIO_Type) &&
+        !_PyArg_NoPositional("MemoryBIO", args))
+        goto exit;
+    if ((type == &PySSLMemoryBIO_Type) &&
+        !_PyArg_NoKeywords("MemoryBIO", kwargs))
+        goto exit;
+    return_value = _ssl_MemoryBIO_impl(type);
+
+exit:
+    return return_value;
 }
 
-/*
- * SSL objects
- */
+PyDoc_STRVAR(_ssl_MemoryBIO_read__doc__,
+"read($self, size=-1, /)\n"
+"--\n"
+"\n"
+"Read up to size bytes from the memory BIO.\n"
+"\n"
+"If size is not specified, read the entire buffer.\n"
+"If the return value is an empty bytes instance, this means either\n"
+"EOF or that no data is available. Use the \"eof\" property to\n"
+"distinguish between the two.");
 
-static PySSLSocket *
-newPySSLSocket(PySSLContext *sslctx, PySocketSockObject *sock,
-               enum py_ssl_server_or_client socket_type,
-               char *server_hostname,
-               PySSLMemoryBIO *inbio, PySSLMemoryBIO *outbio)
+#define _SSL_MEMORYBIO_READ_METHODDEF    \
+    {"read", (PyCFunction)_ssl_MemoryBIO_read, METH_VARARGS, _ssl_MemoryBIO_read__doc__},
+
+static PyObject *
+_ssl_MemoryBIO_read_impl(PySSLMemoryBIO *self, int len);
+
+static PyObject *
+_ssl_MemoryBIO_read(PySSLMemoryBIO *self, PyObject *args)
 {
-    PySSLSocket *self;
-    SSL_CTX *ctx = sslctx->ctx;
-    PyObject *hostname;
-    long mode;
+    PyObject *return_value = NULL;
+    int len = -1;
 
-    self = PyObject_New(PySSLSocket, &PySSLSocket_Type);
-    if (self == NULL)
-        return NULL;
+    if (!PyArg_ParseTuple(args, "|i:read",
+        &len))
+        goto exit;
+    return_value = _ssl_MemoryBIO_read_impl(self, len);
 
-    self->peer_cert = NULL;
-    self->ssl = NULL;
-    self->Socket = NULL;
-    self->ctx = sslctx;
-    self->shutdown_seen_zero = 0;
-    self->handshake_done = 0;
-    self->owner = NULL;
-    if (server_hostname != NULL) {
-        hostname = PyUnicode_Decode(server_hostname, strlen(server_hostname),
-                                   "idna", "strict");
-        if (hostname == NULL) {
-            Py_DECREF(self);
-            return NULL;
-        }
-        self->server_hostname = hostname;
-    } else
-        self->server_hostname = NULL;
-
-    Py_INCREF(sslctx);
-
-    /* Make sure the SSL error state is initialized */
-    (void) ERR_get_state();
-    ERR_clear_error();
-
-    PySSL_BEGIN_ALLOW_THREADS
-    self->ssl = SSL_new(ctx);
-    PySSL_END_ALLOW_THREADS
-    SSL_set_app_data(self->ssl, self);
-    if (sock) {
-        SSL_set_fd(self->ssl, Py_SAFE_DOWNCAST(sock->sock_fd, SOCKET_T, int));
-    } else {
-        /* BIOs are reference counted and SSL_set_bio borrows our reference.
-         * To prevent a double free in memory_bio_dealloc() we need to take an
-         * extra reference here. */
-        CRYPTO_add(&inbio->bio->references, 1, CRYPTO_LOCK_BIO);
-        CRYPTO_add(&outbio->bio->references, 1, CRYPTO_LOCK_BIO);
-        SSL_set_bio(self->ssl, inbio->bio, outbio->bio);
-    }
-    mode = SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER;
-#ifdef SSL_MODE_AUTO_RETRY
-    mode |= SSL_MODE_AUTO_RETRY;
-#endif
-    SSL_set_mode(self->ssl, mode);
-
-#if HAVE_SNI
-    if (server_hostname != NULL)
-        SSL_set_tlsext_host_name(self->ssl, server_hostname);
-#endif
-
-    /* If the socket is in non-blocking mode or timeout mode, set the BIO
-     * to non-blocking mode (blocking is the default)
-     */
-    if (sock && sock->sock_timeout >= 0) {
-        BIO_set_nbio(SSL_get_rbio(self->ssl), 1);
-        BIO_set_nbio(SSL_get_wbio(self->ssl), 1);
-    }
-
-    PySSL_BEGIN_ALLOW_THREADS
-    if (socket_type == PY_SSL_CLIENT)
-        SSL_set_connect_state(self->ssl);
-    else
-        SSL_set_accept_state(self->ssl);
-    PySSL_END_ALLOW_THREADS
-
-    self->socket_type = socket_type;
-    if (sock != NULL) {
-        self->Socket = PyWeakref_NewRef((PyObject *) sock, NULL);
-        if (self->Socket == NULL) {
-            Py_DECREF(self);
-            Py_XDECREF(self->server_hostname);
-            return NULL;
-        }
-    }
-    return self;
+exit:
+    return return_value;
 }
 
-/* SSL object methods */
+PyDoc_STRVAR(_ssl_MemoryBIO_write__doc__,
+"write($self, b, /)\n"
+"--\n"
+"\n"
+"Writes the bytes b into the memory BIO.\n"
+"\n"
+"Returns the number of bytes written.");
 
-static PyObject *PySSL_SSLdo_handshake(PySSLSocket *self)
+#define _SSL_MEMORYBIO_WRITE_METHODDEF    \
+    {"write", (PyCFunction)_ssl_MemoryBIO_write, METH_O, _ssl_MemoryBIO_write__doc__},
+
+static PyObject *
+_ssl_MemoryBIO_write_impl(PySSLMemoryBIO *self, Py_buffer *b);
+
+static PyObject *
+_ssl_MemoryBIO_write(PySSLMemoryBIO *self, PyObject *arg)
 {
-    int ret;
-    int err;
-    int sockstate, nonblocking;
-    PySocketSockObject *sock = GET_SOCKET(self);
-    _PyTime_t timeout, deadline = 0;
-    int has_timeout;
+    PyObject *return_value = NULL;
+    Py_buffer b = {NULL, NULL};
 
-    if (sock) {
-        if (((PyObject*)sock) == Py_None) {
-            _setSSLError("Underlying socket connection gone",
-                         PY_SSL_ERROR_NO_SOCKET, __FILE__, __LINE__);
-            return NULL;
-        }
-        Py_INCREF(sock);
+    if (!PyArg_Parse(arg, "y*:write", &b))
+        goto exit;
+    return_value = _ssl_MemoryBIO_write_impl(self, &b);
 
-        /* just in case the blocking state of the socket has been changed */
-        nonblocking = (sock->sock_timeout >= 0);
-        BIO_set_nbio(SSL_get_rbio(self->ssl), nonblocking);
-        BIO_set_nbio(SSL_get_wbio(self->ssl), nonblocking);
-    }
+exit:
+    /* Cleanup for b */
+    if (b.obj)
+       PyBuffer_Release(&b);
 
-    timeout = GET_SOCKET_TIMEOUT(sock);
-    has_timeout = (timeout > 0);
-    if (has_timeout)
-        deadline = _PyTime_GetMonotonicClock() + timeout;
-
-    /* Actually negotiate SSL connection */
-    /* XXX If SSL_do_handshake() returns 0, it's also a failure. */
-    do {
-        PySSL_BEGIN_ALLOW_THREADS
-        ret = SSL_do_handshake(self->ssl);
-        err = SSL_get_error(self->ssl, ret);
-        PySSL_END_ALLOW_THREADS
-
-        if (PyErr_CheckSignals())
-            goto error;
-
-        if (has_timeout)
-            timeout = deadline - _PyTime_GetMonotonicClock();
-
-        if (err == SSL_ERROR_WANT_READ) {
-            sockstate = PySSL_select(sock, 0, timeout);
-        } else if (err == SSL_ERROR_WANT_WRITE) {
-            sockstate = PySSL_select(sock, 1, timeout);
-        } else {
-            sockstate = SOCKET_OPERATION_OK;
-        }
-
-        if (sockstate == SOCKET_HAS_TIMED_OUT) {
-            PyErr_SetString(PySocketModule.timeout_error,
-                            ERRSTR("The handshake operation timed out"));
-            goto error;
-        } else if (sockstate == SOCKET_HAS_BEEN_CLOSED) {
-            PyErr_SetString(PySSLErrorObject,
-                            ERRSTR("Underlying socket has been closed."));
-            goto error;
-        } else if (sockstate == SOCKET_TOO_LARGE_FOR_SELECT) {
-            PyErr_SetString(PySSLErrorObject,
-                            ERRSTR("Underlying socket too large for select()."));
-            goto error;
-        } else if (sockstate == SOCKET_IS_NONBLOCKING) {
-            break;
-        }
-    } while (err == SSL_ERROR_WANT_READ || err == SSL_ERROR_WANT_WRITE);
-    Py_XDECREF(sock);
-    if (ret < 1)
-        return PySSL_SetError(self, ret, __FILE__, __LINE__);
-
-    if (self->peer_cert)
-        X509_free (self->peer_cert);
-    PySSL_BEGIN_ALLOW_THREADS
-    self->peer_cert = SSL_get_peer_certificate(self->ssl);
-    PySSL_END_ALLOW_THREADS
-    self->handshake_done = 1;
-
-    Py_INCREF(Py_None);
-    return Py_None;
-
-error:
-    Py_XDECREF(sock);
-    return NULL;
+    return return_value;
 }
 
+PyDoc_STRVAR(_ssl_MemoryBIO_write_eof__doc__,
+"write_eof($self, /)\n"
+"--\n"
+"\n"
+"Write an EOF marker to the memory BIO.\n"
+"\n"
+"When all data has been read, the \"eof\" property will be True.");
+
+#define _SSL_MEMORYBIO_WRITE_EOF_METHODDEF    \
+    {"write_eof", (PyCFunction)_ssl_MemoryBIO_write_eof, METH_NOARGS, _ssl_MemoryBIO_write_eof__doc__},
+
 static PyObject *
-_create_tuple_for_attribute (ASN1_OBJECT *name, ASN1_STRING *value) {
+_ssl_MemoryBIO_write_eof_impl(PySSLMemoryBIO *self);
 
-    char namebuf[X509_NAME_MAXLEN];
-    int buflen;
-    PyObject *name_obj;
-    PyObject *value_obj;
-    PyObject *attr;
-    unsigned char *valuebuf = NULL;
-
-    buflen = OBJ_obj2txt(namebuf, sizeof(namebuf), name, 0);
-    if (buflen < 0) {
-        _setSSLError(NULL, 0, __FILE__, __LINE__);
-        goto fail;
-    }
-    name_obj = PyUnicode_FromStringAndSize(namebuf, buflen);
-    if (name_obj == NULL)
-        goto fail;
-
-    buflen = ASN1_STRING_to_UTF8(&valuebuf, value);
-    if (buflen < 0) {
-        _setSSLError(NULL, 0, __FILE__, __LINE__);
-        Py_DECREF(name_obj);
-        goto fail;
-    }
-    value_obj = PyUnicode_DecodeUTF8((char *) valuebuf,
-                                     buflen, "strict");
-    OPENSSL_free(valuebuf);
-    if (value_obj == NULL) {
-        Py_DECREF(name_obj);
-        goto fail;
-    }
-    attr = PyTuple_New(2);
-    if (attr == NULL) {
-        Py_DECREF(name_obj);
-        Py_DECREF(value_obj);
-        goto fail;
-    }
-    PyTuple_SET_ITEM(attr, 0, name_obj);
-    PyTuple_SET_ITEM(attr, 1, value_obj);
-    return attr;
-
-  fail:
-    return NULL;
+static PyObject *
+_ssl_MemoryBIO_write_eof(PySSLMemoryBIO *self, PyObject *Py_UNUSED(ignored))
+{
+    return _ssl_MemoryBIO_write_eof_impl(self);
 }
 
+PyDoc_STRVAR(_ssl_RAND_add__doc__,
+"RAND_add($module, string, entropy, /)\n"
+"--\n"
+"\n"
+"Mix string into the OpenSSL PRNG state.\n"
+"\n"
+"entropy (a float) is a lower bound on the entropy contained in\n"
+"string.  See RFC 1750.");
+
+#define _SSL_RAND_ADD_METHODDEF    \
+    {"RAND_add", (PyCFunction)_ssl_RAND_add, METH_VARARGS, _ssl_RAND_add__doc__},
+
 static PyObject *
-_create_tuple_for_X509_NAME (X509_NAME *xname)
+_ssl_RAND_add_impl(PyModuleDef *module, Py_buffer *view, double entropy);
+
+static PyObject *
+_ssl_RAND_add(PyModuleDef *module, PyObject *args)
 {
-    PyObject *dn = NULL;    /* tuple which represents the "distinguished name" */
-    PyObject *rdn = NULL;   /* tuple to hold a "relative distinguished name" */
-    PyObject *rdnt;
-    PyObject *attr = NULL;   /* tuple to hold an attribute */
-    int entry_count = X509_NAME_entry_count(xname);
-    X509_NAME_ENTRY *entry;
-    ASN1_OBJECT *name;
-    ASN1_STRING *value;
-    int index_counter;
-    int rdn_level = -1;
-    int retcode;
+    PyObject *return_value = NULL;
+    Py_buffer view = {NULL, NULL};
+    double entropy;
 
-    dn = PyList_New(0);
-    if (dn == NULL)
-        return NULL;
-    /* now create another tuple to hold the top-level RDN */
-    rdn = PyList_New(0);
-    if (rdn == NULL)
-        goto fail0;
+    if (!PyArg_ParseTuple(args, "s*d:RAND_add",
+        &view, &entropy))
+        goto exit;
+    return_value = _ssl_RAND_add_impl(module, &view, entropy);
 
-    for (index_counter = 0;
-         index_counter < entry_count;
-         index_counter++)
-    {
-        entry = X509_NAME_get_entry(xname, index_counter);
+exit:
+    /* Cleanup for view */
+    if (view.obj)
+       PyBuffer_Release(&view);
 
-        /* check to see if we've gotten to a new RDN */
-        if (rdn_level >= 0) {
-            if (rdn_level != entry->set) {
-                /* yes, new RDN */
-                /* add old RDN to DN */
-                rdnt = PyList_AsTuple(rdn);
-                Py_DECREF(rdn);
-                if (rdnt == NULL)
-                    goto fail0;
-                retcode = PyList_Append(dn, rdnt);
-                Py_DECREF(rdnt);
-                if (retcode < 0)
-                    goto fail0;
-                /* create new RDN */
-                rdn = PyList_New(0);
-                if (rdn == NULL)
-                    goto fail0;
-            }
-        }
-        rdn_level = entry->set;
-
-        /* now add this attribute to the current RDN */
-        name = X509_NAME_ENTRY_get_object(entry);
-        value = X509_NAME_ENTRY_get_data(entry);
-        attr = _create_tuple_for_attribute(name, value);
-        /*
-        fprintf(stderr, "RDN level %d, attribute %s: %s\n",
-            entry->set,
-            PyBytes_AS_STRING(PyTuple_GET_ITEM(attr, 0)),
-            PyBytes_AS_STRING(PyTuple_GET_ITEM(attr, 1)));
-        */
-        if (attr == NULL)
-            goto fail1;
-        retcode = PyList_Append(rdn, attr);
-        Py_DECREF(attr);
-        if (retcode < 0)
-            goto fail1;
-    }
-    /* now, there's typically a dangling RDN */
-    if (rdn != NULL) {
-        if (PyList_GET_SIZE(rdn) > 0) {
-            rdnt = PyList_AsTuple(rdn);
-            Py_DECREF(rdn);
-            if (rdnt == NULL)
-                goto fail0;
-            retcode = PyList_Append(dn, rdnt);
-            Py_DECREF(rdnt);
-            if (retcode < 0)
-                goto fail0;
-        }
-        else {
-            Py_DECREF(rdn);
-        }
-    }
-
-    /* convert list to tuple */
-    rdnt = PyList_AsTuple(dn);
-    Py_DECREF(dn);
-    if (rdnt == NULL)
-        return NULL;
-    return rdnt;
-
-  fail1:
-    Py_XDECREF(rdn);
-
-  fail0:
-    Py_XDECREF(dn);
-    return NULL;
+    return return_value;
 }
 
+PyDoc_STRVAR(_ssl_RAND_bytes__doc__,
+"RAND_bytes($module, n, /)\n"
+"--\n"
+"\n"
+"Generate n cryptographically strong pseudo-random bytes.");
+
+#define _SSL_RAND_BYTES_METHODDEF    \
+    {"RAND_bytes", (PyCFunction)_ssl_RAND_bytes, METH_O, _ssl_RAND_bytes__doc__},
+
 static PyObject *
-_get_peer_alt_names (X509 *certificate) {
+_ssl_RAND_bytes_impl(PyModuleDef *module, int n);
 
-    /* this code follows the procedure outlined in
-       OpenSSL's crypto/x509v3/v3_prn.c:X509v3_EXT_print()
-       function to extract the STACK_OF(GENERAL_NAME),
-       then iterates through the stack to add the
-       names. */
+static PyObject *
+_ssl_RAND_bytes(PyModuleDef *module, PyObject *arg)
+{
+    PyObject *return_value = NULL;
+    int n;
 
-    int i, j;
-    PyObject *peer_alt_names = Py_None;
-    PyObject *v = NULL, *t;
-    X509_EXTENSION *ext = NULL;
-    GENERAL_NAMES *names = NULL;
-    GENERAL_NAME *name;
-    const X509V3_EXT_METHOD *method;
-    BIO *biobuf = NULL;
-    char buf[2048];
-    char *vptr;
-    int len;
-    const unsigned char *p;
+    if (!PyArg_Parse(arg, "i:RAND_bytes", &n))
+        goto exit;
+    return_value = _ssl_RAND_bytes_impl(module, n);
 
-    if (certificate == NULL)
-        return peer_alt_names;
-
-    /* get a memory buffer */
-    biobuf = BIO_new(BIO_s_mem());
-
-    i = -1;
-    while ((i = X509_get_ext_by_NID(
-                    certificate, NID_subject_alt_name, i)) >= 0) {
-
-        if (peer_alt_names == Py_None) {
-            peer_alt_names = PyList_New(0);
-            if (peer_alt_names == NULL)
-                goto fail;
-        }
-
-        /* now decode the altName */
-        ext = X509_get_ext(certificate, i);
-        if(!(method = X509V3_EXT_get(ext))) {
-            PyErr_SetString
-              (PySSLErrorObject,
-               ERRSTR("No method for internalizing subjectAltName!"));
-            goto fail;
-        }
-
-        p = ext->value->data;
-        if (method->it)
-            names = (GENERAL_NAMES*)
-              (ASN1_item_d2i(NULL,
-                             &p,
-                             ext->value->length,
-                             ASN1_ITEM_ptr(method->it)));
-        else
-            names = (GENERAL_NAMES*)
-              (method->d2i(NULL,
-                           &p,
-                           ext->value->length));
-
-        for(j = 0; j < sk_GENERAL_NAME_num(names); j++) {
-            /* get a rendering of each name in the set of names */
-            int gntype;
-            ASN1_STRING *as = NULL;
-
-            name = sk_GENERAL_NAME_value(names, j);
-            gntype = name->type;
-            switch (gntype) {
-            case GEN_DIRNAME:
-                /* we special-case DirName as a tuple of
-                   tuples of attributes */
-
-                t = PyTuple_New(2);
-                if (t == NULL) {
-                    goto fail;
-                }
-
-                v = PyUnicode_FromString("DirName");
-                if (v == NULL) {
-                    Py_DECREF(t);
-                    goto fail;
-                }
-                PyTuple_SET_ITEM(t, 0, v);
-
-                v = _create_tuple_for_X509_NAME (name->d.dirn);
-                if (v == NULL) {
-                    Py_DECREF(t);
-                    goto fail;
-                }
-                PyTuple_SET_ITEM(t, 1, v);
-                break;
-
-            case GEN_EMAIL:
-            case GEN_DNS:
-            case GEN_URI:
-                /* GENERAL_NAME_print() doesn't handle NULL bytes in ASN1_string
-                   correctly, CVE-2013-4238 */
-                t = PyTuple_New(2);
-                if (t == NULL)
-                    goto fail;
-                switch (gntype) {
-                case GEN_EMAIL:
-                    v = PyUnicode_FromString("email");
-                    as = name->d.rfc822Name;
-                    break;
-                case GEN_DNS:
-                    v = PyUnicode_FromString("DNS");
-                    as = name->d.dNSName;
-                    break;
-                case GEN_URI:
-                    v = PyUnicode_FromString("URI");
-                    as = name->d.uniformResourceIdentifier;
-                    break;
-                }
-                if (v == NULL) {
-                    Py_DECREF(t);
-                    goto fail;
-                }
-                PyTuple_SET_ITEM(t, 0, v);
-                v = PyUnicode_FromStringAndSize((char *)ASN1_STRING_data(as),
-                                                ASN1_STRING_length(as));
-                if (v == NULL) {
-                    Py_DECREF(t);
-                    goto fail;
-                }
-                PyTuple_SET_ITEM(t, 1, v);
-                break;
-
-            default:
-                /* for everything else, we use the OpenSSL print form */
-                switch (gntype) {
-                    /* check for new general name type */
-                    case GEN_OTHERNAME:
-                    case GEN_X400:
-                    case GEN_EDIPARTY:
-                    case GEN_IPADD:
-                    case GEN_RID:
-                        break;
-                    default:
-                        if (PyErr_WarnFormat(PyExc_RuntimeWarning, 1,
-                                             "Unknown general name type %d",
-                                             gntype) == -1) {
-                            goto fail;
-                        }
-                        break;
-                }
-                (void) BIO_reset(biobuf);
-                GENERAL_NAME_print(biobuf, name);
-                len = BIO_gets(biobuf, buf, sizeof(buf)-1);
-                if (len < 0) {
-                    _setSSLError(NULL, 0, __FILE__, __LINE__);
-                    goto fail;
-                }
-                vptr = strchr(buf, ':');
-                if (vptr == NULL)
-                    goto fail;
-                t = PyTuple_New(2);
-                if (t == NULL)
-                    goto fail;
-                v = PyUnicode_FromStringAndSize(buf, (vptr - buf));
-                if (v == NULL) {
-                    Py_DECREF(t);
-                    goto fail;
-                }
-                PyTuple_SET_ITEM(t, 0, v);
-                v = PyUnicode_FromStringAndSize((vptr + 1),
-                                                (len - (vptr - buf + 1)));
-                if (v == NULL) {
-                    Py_DECREF(t);
-                    goto fail;
-                }
-                PyTuple_SET_ITEM(t, 1, v);
-                break;
-            }
-
-            /* and add that rendering to the list */
-
-            if (PyList_Append(peer_alt_names, t) < 0) {
-                Py_DECREF(t);
-                goto fail;
-            }
-            Py_DECREF(t);
-        }
-        sk_GENERAL_NAME_pop_free(names, GENERAL_NAME_free);
-    }
-    BIO_free(biobuf);
-    if (peer_alt_names != Py_None) {
-        v = PyList_AsTuple(peer_alt_names);
-        Py_DECREF(peer_alt_names);
-        return v;
-    } else {
-        return peer_alt_names;
-    }
-
-
-  fail:
-    if (biobuf != NULL)
-        BIO_free(biobuf);
-
-    if (peer_alt_names != Py_None) {
-        Py_XDECREF(peer_alt_names);
-    }
-
-    return NULL;
+exit:
+    return return_value;
 }
 
+PyDoc_STRVAR(_ssl_RAND_pseudo_bytes__doc__,
+"RAND_pseudo_bytes($module, n, /)\n"
+"--\n"
+"\n"
+"Generate n pseudo-random bytes.\n"
+"\n"
+"Return a pair (bytes, is_cryptographic).  is_cryptographic is True\n"
+"if the bytes generated are cryptographically strong.");
+
+#define _SSL_RAND_PSEUDO_BYTES_METHODDEF    \
+    {"RAND_pseudo_bytes", (PyCFunction)_ssl_RAND_pseudo_bytes, METH_O, _ssl_RAND_pseudo_bytes__doc__},
+
 static PyObject *
-_get_aia_uri(X509 *certificate, int nid) {
-    PyObject *lst = NULL, *ostr = NULL;
-    int i, result;
-    AUTHORITY_INFO_ACCESS *info;
+_ssl_RAND_pseudo_bytes_impl(PyModuleDef *module, int n);
 
-    info = X509_get_ext_d2i(certificate, NID_info_access, NULL, NULL);
-    if ((info == NULL) || (sk_ACCESS_DESCRIPTION_num(info) == 0)) {
-        return Py_None;
-    }
+static PyObject *
+_ssl_RAND_pseudo_bytes(PyModuleDef *module, PyObject *arg)
+{
+    PyObject *return_value = NULL;
+    int n;
 
-    if ((lst = PyList_New(0)) == NULL) {
-        goto fail;
-    }
+    if (!PyArg_Parse(arg, "i:RAND_pseudo_bytes", &n))
+        goto exit;
+    return_value = _ssl_RAND_pseudo_bytes_impl(module, n);
 
-    for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
-        ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
-        ASN1_IA5STRING *uri;
-
-        if ((OBJ_obj2nid(ad->method) != nid) ||
-                (ad->location->type != GEN_URI)) {
-            continue;
-        }
-        uri = ad->location->d.uniformResourceIdentifier;
-        ostr = PyUnicode_FromStringAndSize((char *)uri->data,
-                                           uri->length);
-        if (ostr == NULL) {
-            goto fail;
-        }
-        result = PyList_Append(lst, ostr);
-        Py_DECREF(ostr);
-        if (result < 0) {
-            goto fail;
-        }
-    }
-    AUTHORITY_INFO_ACCESS_free(info);
-
-    /* convert to tuple or None */
-    if (PyList_Size(lst) == 0) {
-        Py_DECREF(lst);
-        return Py_None;
-    } else {
-        PyObject *tup;
-        tup = PyList_AsTuple(lst);
-        Py_DECREF(lst);
-        return tup;
-    }
-
-  fail:
-    AUTHORITY_INFO_ACCESS_free(info);
-    Py_XDECREF(lst);
-    return NULL;
+exit:
+    return return_value;
 }
 
+PyDoc_STRVAR(_ssl_RAND_status__doc__,
+"RAND_status($module, /)\n"
+"--\n"
+"\n"
+"Returns 1 if the OpenSSL PRNG has been seeded with enough data and 0 if not.\n"
+"\n"
+"It is necessary to seed the PRNG with RAND_add() on some platforms before\n"
+"using the ssl() function.");
+
+#define _SSL_RAND_STATUS_METHODDEF    \
+    {"RAND_status", (PyCFunction)_ssl_RAND_status, METH_NOARGS, _ssl_RAND_status__doc__},
+
 static PyObject *
-_get_crl_dp(X509 *certificate) {
-    STACK_OF(DIST_POINT) *dps;
-    int i, j, result;
-    PyObject *lst;
+_ssl_RAND_status_impl(PyModuleDef *module);
 
-#if OPENSSL_VERSION_NUMBER < 0x10001000L
-    dps = X509_get_ext_d2i(certificate, NID_crl_distribution_points,
-                           NULL, NULL);
-#else
-    /* Calls x509v3_cache_extensions and sets up crldp */
-    X509_check_ca(certificate);
-    dps = certificate->crldp;
-#endif
-
-    if (dps == NULL) {
-        return Py_None;
-    }
-
-    if ((lst = PyList_New(0)) == NULL) {
-        return NULL;
-    }
-
-    for (i=0; i < sk_DIST_POINT_num(dps); i++) {
-        DIST_POINT *dp;
-        STACK_OF(GENERAL_NAME) *gns;
-
-        dp = sk_DIST_POINT_value(dps, i);
-        gns = dp->distpoint->name.fullname;
-
-        for (j=0; j < sk_GENERAL_NAME_num(gns); j++) {
-            GENERAL_NAME *gn;
-            ASN1_IA5STRING *uri;
-            PyObject *ouri;
-
-            gn = sk_GENERAL_NAME_value(gns, j);
-            if (gn->type != GEN_URI) {
-                continue;
-            }
-            uri = gn->d.uniformResourceIdentifier;
-            ouri = PyUnicode_FromStringAndSize((char *)uri->data,
-                                               uri->length);
-            if (ouri == NULL) {
-                Py_DECREF(lst);
-                return NULL;
-            }
-            result = PyList_Append(lst, ouri);
-            Py_DECREF(ouri);
-            if (result < 0) {
-                Py_DECREF(lst);
-                return NULL;
-            }
-        }
-    }
-    /* convert to tuple or None */
-    if (PyList_Size(lst) == 0) {
-        Py_DECREF(lst);
-        return Py_None;
-    } else {
-        PyObject *tup;
-        tup = PyList_AsTuple(lst);
-        Py_DECREF(lst);
-        return tup;
-    }
+static PyObject *
+_ssl_RAND_status(PyModuleDef *module, PyObject *Py_UNUSED(ignored))
+{
+    return _ssl_RAND_status_impl(module);
 }
 
+#if defined(HAVE_RAND_EGD)
+
+PyDoc_STRVAR(_ssl_RAND_egd__doc__,
+"RAND_egd($module, path, /)\n"
+"--\n"
+"\n"
+"Queries the entropy gather daemon (EGD) on the socket named by \'path\'.\n"
+"\n"
+"Returns number of bytes read.  Raises SSLError if connection to EGD\n"
+"fails or if it does not provide enough data to seed PRNG.");
+
+#define _SSL_RAND_EGD_METHODDEF    \
+    {"RAND_egd", (PyCFunction)_ssl_RAND_egd, METH_O, _ssl_RAND_egd__doc__},
+
 static PyObject *
-_decode_certificate(X509 *certificate) {
+_ssl_RAND_egd_impl(PyModuleDef *module, PyObject *path);
 
-    PyObject *retval = NULL;
-    BIO *biobuf = NULL;
-    PyObject *peer;
-    PyObject *peer_alt_names = NULL;
-    PyObject *issuer;
-    PyObject *version;
-    PyObject *sn_obj;
-    PyObject *obj;
-    ASN1_INTEGER *serialNumber;
-    char buf[2048];
-    int len, result;
-    ASN1_TIME *notBefore, *notAfter;
-    PyObject *pnotBefore, *pnotAfter;
+static PyObject *
+_ssl_RAND_egd(PyModuleDef *module, PyObject *arg)
+{
+    PyObject *return_value = NULL;
+    PyObject *path;
 
-    retval = PyDict_New();
-    if (retval == NULL)
-        return NULL;
+    if (!PyArg_Parse(arg, "O&:RAND_egd", PyUnicode_FSConverter, &path))
+        goto exit;
+    return_value = _ssl_RAND_egd_impl(module, path);
 
-    peer = _create_tuple_for_X509_NAME(
-        X509_get_subject_name(certificate));
-    if (peer == NULL)
-        goto fail0;
-    if (PyDict_SetItemString(retval, (const char *) "subject", peer) < 0) {
-        Py_DECREF(peer);
-        goto fail0;
-    }
-    Py_DECREF(peer);
-
-    issuer = _create_tuple_for_X509_NAME(
-        X509_get_issuer_name(certificate));
-    if (issuer == NULL)
-        goto fail0;
-    if (PyDict_SetItemString(retval, (const char *)"issuer", issuer) < 0) {
-        Py_DECREF(issuer);
-        goto fail0;
-    }
-    Py_DECREF(issuer);
-
-    version = PyLong_FromLong(X509_get_version(certificate) + 1);
-    if (version == NULL)
-        goto fail0;
-    if (PyDict_SetItemString(retval, "version", version) < 0) {
-        Py_DECREF(version);
-        goto fail0;
-    }
-    Py_DECREF(version);
-
-    /* get a memory buffer */
-    biobuf = BIO_new(BIO_s_mem());
-
-    (void) BIO_reset(biobuf);
-    serialNumber = X509_get_serialNumber(certificate);
-    /* should not exceed 20 octets, 160 bits, so buf is big enough */
-    i2a_ASN1_INTEGER(biobuf, serialNumber);
-    len = BIO_gets(biobuf, buf, sizeof(buf)-1);
-    if (len < 0) {
-        _setSSLError(NULL, 0, __FILE__, __LINE__);
-        goto fail1;
-    }
-    sn_obj = PyUnicode_FromStringAndSize(buf, len);
-    if (sn_obj == NULL)
-        goto fail1;
-    if (PyDict_SetItemString(retval, "serialNumber", sn_obj) < 0) {
-        Py_DECREF(sn_obj);
-        goto fail1;
-    }
-    Py_DECREF(sn_obj);
-
-    (void) BIO_reset(biobuf);
-    notBefore = X509_get_notBefore(certificate);
-    ASN1_TIME_print(biobuf, notBefore);
-    len = BIO_gets(biobuf, buf, sizeof(buf)-1);
-    if (len < 0) {
-        _setSSLError(NULL, 0, __FILE__, __LINE__);
-        goto fail1;
-    }
-    pnotBefore = PyUnicode_FromStringAndSize(buf, len);
-    if (pnotBefore == NULL)
-        goto fail1;
-    if (PyDict_SetItemString(retval, "notBefore", pnotBefore) < 0) {
-        Py_DECREF(pnotBefore);
-        goto fail1;
-    }
-    Py_DECREF(pnotBefore);
-
-    (void) BIO_reset(biobuf);
-    notAfter = X509_get_notAfter(certificate);
-    ASN1_TIME_print(biobuf, notAfter);
-    len = BIO_gets(biobuf, buf, sizeof(buf)-1);
-    if (len < 0) {
-        _setSSLError(NULL, 0, __FILE__, __LINE__);
-        goto fail1;
-    }
-    pnotAfter = PyUnicode_FromStringAndSize(buf, len);
-    if (pnotAfter == NULL)
-        goto fail1;
-    if (PyDict_SetItemString(retval, "notAfter", pnotAfter) < 0) {
-        Py_DECREF(pnotAfter);
-        goto fail1;
-    }
-    Py_DECREF(pnotAfter);
-
-    /* Now look for subjectAltName */
-
-    peer_alt_names = _get_peer_alt_names(certificate);
-    if (peer_alt_names == NULL)
-        goto fail1;
-    else if (peer_alt_names != Py_None) {
-        if (PyDict_SetItemString(retval, "subjectAltName",
-                                 peer_alt_names) < 0) {
-            Py_DECREF(peer_alt_names);
-            goto fail1;
-        }
-        Py_DECREF(peer_alt_names);
-    }
-
-    /* Authority Information Access: OCSP URIs */
-    obj = _get_aia_uri(certificate, NID_ad_OCSP);
-    if (obj == NULL) {
-        goto fail1;
-    } else if (obj != Py_None) {
-        result = PyDict_SetItemString(retval, "OCSP", obj);
-        Py_DECREF(obj);
-        if (result < 0) {
-            goto fail1;
-        }
-    }
-
-    obj = _get_aia_uri(certificate, NID_ad_ca_issuers);
-    if (obj == NULL) {
-        goto fail1;
-    } else if (obj != Py_None) {
-        result = PyDict_SetItemString(retval, "caIssuers", obj);
-        Py_DECREF(obj);
-        if (result < 0) {
-            goto fail1;
-        }
-    }
-
-    /* CDP (CRL distribution points) */
-    obj = _get_crl_dp(certificate);
-    if (obj == NULL) {
-        goto fail1;
-    } else if (obj != Py_None) {
-        result = PyDict_SetItemString(retval, "crlDistributionPoints", obj);
-        Py_DECREF(obj);
-        if (result < 0) {
-            goto fail1;
-        }
-    }
-
-    BIO_free(biobuf);
-    return retval;
-
-  fail1:
-    if (biobuf != NULL)
-        BIO_free(biobuf);
-  fail0:
-    Py_XDECREF(retval);
-    return NULL;
+exit:
+    return return_value;
 }
 
+#endif /* defined(HAVE_RAND_EGD) */
+
+PyDoc_STRVAR(_ssl_get_default_verify_paths__doc__,
+"get_default_verify_paths($module, /)\n"
+"--\n"
+"\n"
+"Return search paths and environment vars that are used by SSLContext\'s set_default_verify_paths() to load default CAs.\n"
+"\n"
+"The values are \'cert_file_env\', \'cert_file\', \'cert_dir_env\', \'cert_dir\'.");
+
+#define _SSL_GET_DEFAULT_VERIFY_PATHS_METHODDEF    \
+    {"get_default_verify_paths", (PyCFunction)_ssl_get_default_verify_paths, METH_NOARGS, _ssl_get_default_verify_paths__doc__},
+
 static PyObject *
-_certificate_to_der(X509 *certificate)
+_ssl_get_default_verify_paths_impl(PyModuleDef *module);
+
+static PyObject *
+_ssl_get_default_verify_paths(PyModuleDef *module, PyObject *Py_UNUSED(ignored))
 {
-    unsigned char *bytes_buf = NULL;
-    int len;
-    PyObject *retval;
-
-    bytes_buf = NULL;
-    len = i2d_X509(certificate, &bytes_buf);
-    if (len < 0) {
-        _setSSLError(NULL, 0, __FILE__, __LINE__);
-        return NULL;
-    }
-    /* this is actually an immutable bytes sequence */
-    retval = PyBytes_FromStringAndSize((const char *) bytes_buf, len);
-    OPENSSL_free(bytes_buf);
-    return retval;
+    return _ssl_get_default_verify_paths_impl(module);
 }
 
+PyDoc_STRVAR(_ssl_txt2obj__doc__,
+"txt2obj($module, /, txt, name=False)\n"
+"--\n"
+"\n"
+"Lookup NID, short name, long name and OID of an ASN1_OBJECT.\n"
+"\n"
+"By default objects are looked up by OID. With name=True short and\n"
+"long name are also matched.");
+
+#define _SSL_TXT2OBJ_METHODDEF    \
+    {"txt2obj", (PyCFunction)_ssl_txt2obj, METH_VARARGS|METH_KEYWORDS, _ssl_txt2obj__doc__},
+
 static PyObject *
-PySSL_test_decode_certificate (PyObject *mod, PyObject *args) {
+_ssl_txt2obj_impl(PyModuleDef *module, const char *txt, int name);
 
-    PyObject *retval = NULL;
-    PyObject *filename;
-    X509 *x=NULL;
-    BIO *cert;
+static PyObject *
+_ssl_txt2obj(PyModuleDef *module, PyObject *args, PyObject *kwargs)
+{
+    PyObject *return_value = NULL;
+    static char *_keywords[] = {"txt", "name", NULL};
+    const char *txt;
+    int name = 0;
 
-    if (!PyArg_ParseTuple(args, "O&:test_decode_certificate",
-                          PyUnicode_FSConverter, &filename))
-        return NULL;
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|p:txt2obj", _keywords,
+        &txt, &name))
+        goto exit;
+    return_value = _ssl_txt2obj_impl(module, txt, name);
 
-    if ((cert=BIO_new(BIO_s_file())) == NULL) {
-        PyErr_SetString(PySSLErrorObject,
-                        "Can't malloc memory to read file");
-        goto fail0;
-    }
-
-    if (BIO_read_filename(cert, PyBytes_AsString(filename)) <= 0) {
-        PyErr_SetString(PySSLErrorObject,
-                        "Can't open file");
-        goto fail0;
-    }
-
-    x = PEM_read_bio_X509_AUX(cert,NULL, NULL, NULL);
-    if (x == NULL) {
-        PyErr_SetString(PySSLErrorObject,
-                        "Error decoding PEM-encoded file");
-        goto fail0;
-    }
-
-    retval = _decode_certificate(x);
-    X509_free(x);
-
-  fail0:
-    Py_DECREF(filename);
-    if (cert != NULL) BIO_free(cert);
-    return retval;
+exit:
+    return return_value;
 }
 
+PyDoc_STRVAR(_ssl_nid2obj__doc__,
+"nid2obj($module, nid, /)\n"
+"--\n"
+"\n"
+"Lookup NID, short name, long name and OID of an ASN1_OBJECT by NID.");
+
+#define _SSL_NID2OBJ_METHODDEF    \
+    {"nid2obj", (PyCFunction)_ssl_nid2obj, METH_O, _ssl_nid2obj__doc__},
 
 static PyObject *
-PySSL_peercert(PySSLSocket *self, PyObject *args)
+_ssl_nid2obj_impl(PyModuleDef *module, int nid);
+
+static PyObject *
+_ssl_nid2obj(PyModuleDef *module, PyObject *arg)
 {
-    int verification;
-    int binary_mode = 0;
+    PyObject *return_value = NULL;
+    int nid;
 
-    if (!PyArg_ParseTuple(args, "|p:peer_certificate", &binary_mode))
-        return NULL;
+    if (!PyArg_Parse(arg, "i:nid2obj", &nid))
+        goto exit;
+    return_value = _ssl_nid2obj_impl(module, nid);
 
-    if (!self->handshake_done) {
-        PyErr_SetString(PyExc_ValueError,
-                        "handshake not done yet");
-        return NULL;
-    }
-    if (!self->peer_cert)
-        Py_RETURN_NONE;
-
-    if (binary_mode) {
-        /* return cert in DER-encoded format */
-        return _certificate_to_der(self->peer_cert);
-    } else {
-        verification = SSL_CTX_get_verify_mode(SSL_get_SSL_CTX(self->ssl));
-        if ((verification & SSL_VERIFY_PEER) == 0)
-            return PyDict_New();
-        else
-            return _decode_certificate(self->peer_cert);
-    }
+exit:
+    return return_value;
 }
 
-PyDoc_STRVAR(PySSL_peercert_doc,
-"peer_certificate([der=False]) -> certificate\n\
-\n\
-Returns the certificate for the peer.  If no certificate was provided,\n\
-returns None.  If a certificate was provided, but not validated, returns\n\
-an empty dictionary.  Otherwise returns a dict containing information\n\
-about the peer certificate.\n\
-\n\
-If the optional argument is True, returns a DER-encoded copy of the\n\
-peer certificate, or None if no certificate was provided.  This will\n\
-return the certificate even if it wasn't validated.");
+#if defined(_MSC_VER)
+
+PyDoc_STRVAR(_ssl_enum_certificates__doc__,
+"enum_certificates($module, /, store_name)\n"
+"--\n"
+"\n"
+"Retrieve certificates from Windows\' cert store.\n"
+"\n"
+"store_name may be one of \'CA\', \'ROOT\' or \'MY\'.  The system may provide\n"
+"more cert storages, too.  The function returns a list of (bytes,\n"
+"encoding_type, trust) tuples.  The encoding_type flag can be interpreted\n"
+"with X509_ASN_ENCODING or PKCS_7_ASN_ENCODING. The trust setting is either\n"
+"a set of OIDs or the boolean True.");
+
+#define _SSL_ENUM_CERTIFICATES_METHODDEF    \
+    {"enum_certificates", (PyCFunction)_ssl_enum_certificates, METH_VARARGS|METH_KEYWORDS, _ssl_enum_certificates__doc__},
 
 static PyObject *
-cipher_to_tuple(const SSL_CIPHER *cipher)
+_ssl_enum_certificates_impl(PyModuleDef *module, const char *store_name);
+
+static PyObject *
+_ssl_enum_certificates(PyModuleDef *module, PyObject *args, PyObject *kwargs)
 {
-    const char *cipher_name, *cipher_protocol;
-    PyObject *v, *retval = PyTuple_New(3);
-    if (retval == NULL)
-        return NULL;
+    PyObject *return_value = NULL;
+    static char *_keywords[] = {"store_name", NULL};
+    const char *store_name;
 
-    cipher_name = SSL_CIPHER_get_name(cipher);
-    if (cipher_name == NULL) {
-        Py_INCREF(Py_None);
-        PyTuple_SET_ITEM(retval, 0, Py_None);
-    } else {
-        v = PyUnicode_FromString(cipher_name);
-        if (v == NULL)
-            goto fail;
-        PyTuple_SET_ITEM(retval, 0, v);
-    }
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s:enum_certificates", _keywords,
+        &store_name))
+        goto exit;
+    return_value = _ssl_enum_certificates_impl(module, store_name);
 
-    cipher_protocol = SSL_CIPHER_get_version(cipher);
-    if (cipher_protocol == NULL) {
-        Py_INCREF(Py_None);
-        PyTuple_SET_ITEM(retval, 1, Py_None);
-    } else {
-        v = PyUnicode_FromString(cipher_protocol);
-        if (v == NULL)
-            goto fail;
-        PyTuple_SET_ITEM(retval, 1, v);
-    }
-
-    v = PyLong_FromLong(SSL_CIPHER_get_bits(cipher, NULL));
-    if (v == NULL)
-        goto fail;
-    PyTuple_SET_ITEM(retval, 2, v);
-
-    return retval;
-
-  fail:
-    Py_DECREF(retval);
-    return NULL;
+exit:
+    return return_value;
 }
 
-static PyObject *PySSL_shared_ciphers(PySSLSocket *self)
+#endif /* defined(_MSC_VER) */
+
+#if defined(_MSC_VER)
+
+PyDoc_STRVAR(_ssl_enum_crls__doc__,
+"enum_crls($module, /, store_name)\n"
+"--\n"
+"\n"
+"Retrieve CRLs from Windows\' cert store.\n"
+"\n"
+"store_name may be one of \'CA\', \'ROOT\' or \'MY\'.  The system may provide\n"
+"more cert storages, too.  The function returns a list of (bytes,\n"
+"encoding_type) tuples.  The encoding_type flag can be interpreted with\n"
+"X509_ASN_ENCODING or PKCS_7_ASN_ENCODING.");
+
+#define _SSL_ENUM_CRLS_METHODDEF    \
+    {"enum_crls", (PyCFunction)_ssl_enum_crls, METH_VARARGS|METH_KEYWORDS, _ssl_enum_crls__doc__},
+
+static PyObject *
+_ssl_enum_crls_impl(PyModuleDef *module, const char *store_name);
+
+static PyObject *
+_ssl_enum_crls(PyModuleDef *module, PyObject *args, PyObject *kwargs)
 {
-    SSL_SESSION *sess = SSL_get_session(self->ssl);
-    STACK_OF(SSL_CIPHER) *ciphers;
-    int i;
-    PyObject *res;
+    PyObject *return_value = NULL;
+    static char *_keywords[] = {"store_name", NULL};
+    const char *store_name;
 
-    if (!sess || !sess->ciphers)
-        Py_RETURN_NONE;
-    ciphers = sess->ciphers;
-    res = PyList_New(sk_SSL_CIPHER_num(ciphers));
-    if (!res)
-        return NULL;
-    for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
-        PyObject *tup = cipher_to_tuple(sk_SSL_CIPHER_value(ciphers, i));
-        if (!tup) {
-            Py_DECREF(res);
-            return NULL;
-        }
-        PyList_SET_ITEM(res, i, tup);
-    }
-    return res;
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s:enum_crls", _keywords,
+        &store_name))
+        goto exit;
+    return_value = _ssl_enum_crls_impl(module, store_name);
+
+exit:
+    return return_value;
 }
 
-static PyObject *PySSL_cipher (PySSLSocket *self)
-{
-    const SSL_CIPHER *current;
+#endif /* defined(_MSC_VER) */
 
-    if (self->ssl == NULL)
-        Py_RETURN_NONE;
-    current = SSL_get_current_cipher(self->ssl);
-    if (current == NULL)
-        Py_RETURN_NONE;
-    return cipher_to_tuple(current);
-}
+#ifndef _SSL__SSLSOCKET_SELECTED_NPN_PROTOCOL_METHODDEF
+    #define _SSL__SSLSOCKET_SELECTED_NPN_PROTOCOL_METHODDEF
+#endif /* !defined(_SSL__SSLSOCKET_SELECTED_NPN_PROTOCOL_METHODDEF) */
 
-static PyObject *PySSL_version(PySSLSocket *self)
-{
-    const char *version;
+#ifndef _SSL__SSLSOCKET_SELECTED_ALPN_PROTOCOL_METHODDEF
+    #define _SSL__SSLSOCKET_SELECTED_ALPN_PROTOCOL_METHODDEF
+#endif /* !defined(_SSL__SSLSOCKET_SELECTED_ALPN_PROTOCOL_METHODDEF) */
 
-    if (self->ssl == NULL)
-        Py_RETURN_NONE;
-    version = SSL_get_version(self->ssl);
-    if (!strcmp(version, "unknown"))
-        Py_RETURN_NONE;
-    return PyUnicode_FromString(version);
-}
+#ifndef _SSL__SSLCONTEXT_SET_ECDH_CURVE_METHODDEF
+    #define _SSL__SSLCONTEXT_SET_ECDH_CURVE_METHODDEF
+#endif /* !defined(_SSL__SSLCONTEXT_SET_ECDH_CURVE_METHODDEF) */
 
-#ifdef OPENSSL_NPN_NEGOTIATED
-static PyObject *PySSL_selected_npn_protocol(PySSLSocket *self) {
-    const unsigned char *out;
-    unsigned int outlen;
+#ifndef _SSL_RAND_EGD_METHODDEF
+    #define _SSL_RAND_EGD_METHODDEF
+#endif /* !defined(_SSL_RAND_EGD_METHODDEF) */
 
-    SSL_get0_next_proto_negotiated(self->ssl,
-                                   &out, &outlen);
+#ifndef _SSL_ENUM_CERTIFICATES_METHODDEF
+    #define _SSL_ENUM_CERTIFICATES_METHODDEF
+#endif /* !defined(_SSL_ENUM_CERTIFICATES_METHODDEF) */
 
-    if (out == NULL)
-        Py_RETURN_NONE;
-    return PyUnicode_FromStringAndSize((char *)out, outlen);
-}
-#endif
-
-#ifdef HAVE_ALPN
-static PyObject *PySSL_selected_alpn_protocol(PySSLSocket *self) {
-    const unsigned char *out;
-    unsigned int outlen;
-
-    SSL_get0_alpn_selected(self->ssl, &out, &outlen);
-
-    if (out == NULL)
-        Py_RETURN_NONE;
-    return PyUnicode_FromStringAndSize((char *)out, outlen);
-}
-#endif
-
-static PyObject *PySSL_compression(PySSLSocket *self) {
-#ifdef OPENSSL_NO_COMP
-    Py_RETURN_NONE;
-#else
-    const COMP_METHOD *comp_method;
-    const char *short_name;
-
-    if (self->ssl == NULL)
-        Py_RETURN_NONE;
-    comp_method = SSL_get_current_compression(self->ssl);
-    if (comp_method == NULL || comp_method->type == NID_undef)
-        Py_RETURN_NONE;
-    short_name = OBJ_nid2sn(comp_method->type);
-    if (short_name == NULL)
-        Py_RETURN_NONE;
-    return PyUnicode_DecodeFSDefault(short_name);
-#endif
-}
-
-static PySSLContext *PySSL_get_context(PySSLSocket *self, void *closure) {
-    Py_INCREF(self->ctx);
-    return self->ctx;
-}
-
-static int PySSL_set_context(PySSLSocket *self, PyObject *value,
-                                   void *closure) {
-
-    if (PyObject_TypeCheck(value, &PySSLContext_Type)) {
-#if !HAVE_SNI
-        PyErr_SetString(PyExc_NotImplementedError, "setting a socket's "
-                        "context is not supported by your OpenSSL library");
-        return -1;
-#else
-        Py_INCREF(value);
-        Py_DECREF(self->ctx);
-        self->ctx = (PySSLContext *) value;
-        SSL_set_SSL_CTX(self->ssl, self->ctx->ctx);
-#endif
-    } else {
-        PyErr_SetString(PyExc_TypeError, "The value must be a SSLContext");
-        return -1;
-    }
-
-    return 0;
-}
-
-PyDoc_STRVAR(PySSL_set_context_doc,
-"_setter_context(ctx)\n\
-\
-This changes the context associated with the SSLSocket. This is typically\n\
-used from within a callback function set by the set_servername_callback\n\
-on the SSLContext to change the certificate information associated with the\n\
-SSLSocket before the cryptographic exchange handshake messages\n");
-
-
-static PyObject *
-PySSL_get_server_side(PySSLSocket *self, void *c)
-{
-    return PyBool_FromLong(self->socket_type == PY_SSL_SERVER);
-}
-
-PyDoc_STRVAR(PySSL_get_server_side_doc,
-"Whether this is a server-side socket.");
-
-static PyObject *
-PySSL_get_server_hostname(PySSLSocket *self, void *c)
-{
-    if (self->server_hostname == NULL)
-        Py_RETURN_NONE;
-    Py_INCREF(self->server_hostname);
-    return self->server_hostname;
-}
-
-PyDoc_STRVAR(PySSL_get_server_hostname_doc,
-"The currently set server hostname (for SNI).");
-
-static PyObject *
-PySSL_get_owner(PySSLSocket *self, void *c)
-{
-    PyObject *owner;
-
-    if (self->owner == NULL)
-        Py_RETURN_NONE;
-
-    owner = PyWeakref_GetObject(self->owner);
-    Py_INCREF(owner);
-    return owner;
-}
-
-static int
-PySSL_set_owner(PySSLSocket *self, PyObject *value, void *c)
-{
-    Py_XDECREF(self->owner);
-    self->owner = PyWeakref_NewRef(value, NULL);
-    if (self->owner == NULL)
-        return -1;
-    return 0;
-}
-
-PyDoc_STRVAR(PySSL_get_owner_doc,
-"The Python-level owner of this object.\
-Passed as \"self\" in servername callback.");
-
-
-static void PySSL_dealloc(PySSLSocket *self)
-{
-    if (self->peer_cert)        /* Possible not to have one? */
-        X509_free (self->peer_cert);
-    if (self->ssl)
-        SSL_free(self->ssl);
-    Py_XDECREF(self->Socket);
-    Py_XDECREF(self->ctx);
-    Py_XDECREF(self->server_hostname);
-    Py_XDECREF(self->owner);
-    PyObject_Del(self);
-}
-
-/* If the socket has a timeout, do a select()/poll() on the socket.
-   The argument writing indicates the direction.
-   Returns one of the possibilities in the timeout_state enum (above).
- */
-
-static int
-PySSL_select(PySocketSockObject *s, int writing, _PyTime_t timeout)
-{
-    int rc;
-#ifdef HAVE_POLL
-    struct pollfd pollfd;
-    _PyTime_t ms;
-#else
-    int nfds;
-    fd_set fds;
-    struct timeval tv;
-#endif
-
-    /* Nothing to do unless we're in timeout mode (not non-blocking) */
-    if ((s == NULL) || (timeout == 0))
-        return SOCKET_IS_NONBLOCKING;
-    else if (timeout < 0) {
-        if (s->sock_timeout > 0)
-            return SOCKET_HAS_TIMED_OUT;
-        else
-            return SOCKET_IS_BLOCKING;
-    }
-
-    /* Guard against closed socket */
-    if (s->sock_fd < 0)
-        return SOCKET_HAS_BEEN_CLOSED;
-
-    /* Prefer poll, if available, since you can poll() any fd
-     * which can't be done with select(). */
-#ifdef HAVE_POLL
-    pollfd.fd = s->sock_fd;
-    pollfd.events = writing ? POLLOUT : POLLIN;
-
-    /* timeout is in seconds, poll() uses milliseconds */
-    ms = (int)_PyTime_AsMilliseconds(timeout, _PyTime_ROUND_CEILING);
-    assert(ms <= INT_MAX);
-
-    PySSL_BEGIN_ALLOW_THREADS
-    rc = poll(&pollfd, 1, (int)ms);
-    PySSL_END_ALLOW_THREADS
-#else
-    /* Guard against socket too large for select*/
-    if (!_PyIsSelectable_fd(s->sock_fd))
-        return SOCKET_TOO_LARGE_FOR_SELECT;
-
-    _PyTime_AsTimeval_noraise(timeout, &tv, _PyTime_ROUND_CEILING);
-
-    FD_ZERO(&fds);
-    FD_SET(s->sock_fd, &fds);
-
-    /* Wait until the socket becomes ready */
-    PySSL_BEGIN_ALLOW_THREADS
-    nfds = Py_SAFE_DOWNCAST(s->sock_fd+1, SOCKET_T, int);
-    if (writing)
-        rc = select(nfds, NULL, &fds, NULL, &tv);
-    else
-        rc = select(nfds, &fds, NULL, NULL, &tv);
-    PySSL_END_ALLOW_THREADS
-#endif
-
-    /* Return SOCKET_TIMED_OUT on timeout, SOCKET_OPERATION_OK otherwise
-       (when we are able to write or when there's something to read) */
-    return rc == 0 ? SOCKET_HAS_TIMED_OUT : SOCKET_OPERATION_OK;
-}
-
-static PyObject *PySSL_SSLwrite(PySSLSocket *self, PyObject *args)
-{
-    Py_buffer buf;
-    int len;
-    int sockstate;
-    int err;
-    int nonblocking;
-    PySocketSockObject *sock = GET_SOCKET(self);
-    _PyTime_t timeout, deadline = 0;
-    int has_timeout;
-
-    if (sock != NULL) {
-        if (((PyObject*)sock) == Py_None) {
-            _setSSLError("Underlying socket connection gone",
-                         PY_SSL_ERROR_NO_SOCKET, __FILE__, __LINE__);
-            return NULL;
-        }
-        Py_INCREF(sock);
-    }
-
-    if (!PyArg_ParseTuple(args, "y*:write", &buf)) {
-        Py_XDECREF(sock);
-        return NULL;
-    }
-
-    if (buf.len > INT_MAX) {
-        PyErr_Format(PyExc_OverflowError,
-                     "string longer than %d bytes", INT_MAX);
-        goto error;
-    }
-
-    if (sock != NULL) {
-        /* just in case the blocking state of the socket has been changed */
-        nonblocking = (sock->sock_timeout >= 0);
-        BIO_set_nbio(SSL_get_rbio(self->ssl), nonblocking);
-        BIO_set_nbio(SSL_get_wbio(self->ssl), nonblocking);
-    }
-
-    timeout = GET_SOCKET_TIMEOUT(sock);
-    has_timeout = (timeout > 0);
-    if (has_timeout)
-        deadline = _PyTime_GetMonotonicClock() + timeout;
-
-    sockstate = PySSL_select(sock, 1, timeout);
-    if (sockstate == SOCKET_HAS_TIMED_OUT) {
-        PyErr_SetString(PySocketModule.timeout_error,
-                        "The write operation timed out");
-        goto error;
-    } else if (sockstate == SOCKET_HAS_BEEN_CLOSED) {
-        PyErr_SetString(PySSLErrorObject,
-                        "Underlying socket has been closed.");
-        goto error;
-    } else if (sockstate == SOCKET_TOO_LARGE_FOR_SELECT) {
-        PyErr_SetString(PySSLErrorObject,
-                        "Underlying socket too large for select().");
-        goto error;
-    }
-
-    do {
-        PySSL_BEGIN_ALLOW_THREADS
-        len = SSL_write(self->ssl, buf.buf, (int)buf.len);
-        err = SSL_get_error(self->ssl, len);
-        PySSL_END_ALLOW_THREADS
-
-        if (PyErr_CheckSignals())
-            goto error;
-
-        if (has_timeout)
-            timeout = deadline - _PyTime_GetMonotonicClock();
-
-        if (err == SSL_ERROR_WANT_READ) {
-            sockstate = PySSL_select(sock, 0, timeout);
-        } else if (err == SSL_ERROR_WANT_WRITE) {
-            sockstate = PySSL_select(sock, 1, timeout);
-        } else {
-            sockstate = SOCKET_OPERATION_OK;
-        }
-
-        if (sockstate == SOCKET_HAS_TIMED_OUT) {
-            PyErr_SetString(PySocketModule.timeout_error,
-                            "The write operation timed out");
-            goto error;
-        } else if (sockstate == SOCKET_HAS_BEEN_CLOSED) {
-            PyErr_SetString(PySSLErrorObject,
-                            "Underlying socket has been closed.");
-            goto error;
-        } else if (sockstate == SOCKET_IS_NONBLOCKING) {
-            break;
-        }
-    } while (err == SSL_ERROR_WANT_READ || err == SSL_ERROR_WANT_WRITE);
-
-    Py_XDECREF(sock);
-    PyBuffer_Release(&buf);
-    if (len > 0)
-        return PyLong_FromLong(len);
-    else
-        return PySSL_SetError(self, len, __FILE__, __LINE__);
-
-error:
-    Py_XDECREF(sock);
-    PyBuffer_Release(&buf);
-    return NULL;
-}
-
-PyDoc_STRVAR(PySSL_SSLwrite_doc,
-"write(s) -> len\n\
-\n\
-Writes the string s into the SSL object.  Returns the number\n\
-of bytes written.");
-
-static PyObject *PySSL_SSLpending(PySSLSocket *self)
-{
-    int count = 0;
-
-    PySSL_BEGIN_ALLOW_THREADS
-    count = SSL_pending(self->ssl);
-    PySSL_END_ALLOW_THREADS
-    if (count < 0)
-        return PySSL_SetError(self, count, __FILE__, __LINE__);
-    else
-        return PyLong_FromLong(count);
-}
-
-PyDoc_STRVAR(PySSL_SSLpending_doc,
-"pending() -> count\n\
-\n\
-Returns the number of already decrypted bytes available for read,\n\
-pending on the connection.\n");
-
-static PyObject *PySSL_SSLread(PySSLSocket *self, PyObject *args)
-{
-    PyObject *dest = NULL;
-    Py_buffer buf;
-    char *mem;
-    int len, count;
-    int buf_passed = 0;
-    int sockstate;
-    int err;
-    int nonblocking;
-    PySocketSockObject *sock = GET_SOCKET(self);
-    _PyTime_t timeout, deadline = 0;
-    int has_timeout;
-
-    if (sock != NULL) {
-        if (((PyObject*)sock) == Py_None) {
-            _setSSLError("Underlying socket connection gone",
-                         PY_SSL_ERROR_NO_SOCKET, __FILE__, __LINE__);
-            return NULL;
-        }
-        Py_INCREF(sock);
-    }
-
-    buf.obj = NULL;
-    buf.buf = NULL;
-    if (!PyArg_ParseTuple(args, "i|w*:read", &len, &buf))
-        goto error;
-
-    if ((buf.buf == NULL) && (buf.obj == NULL)) {
-        dest = PyBytes_FromStringAndSize(NULL, len);
-        if (dest == NULL)
-            goto error;
-        mem = PyBytes_AS_STRING(dest);
-    }
-    else {
-        buf_passed = 1;
-        mem = buf.buf;
-        if (len <= 0 || len > buf.len) {
-            len = (int) buf.len;
-            if (buf.len != len) {
-                PyErr_SetString(PyExc_OverflowError,
-                                "maximum length can't fit in a C 'int'");
-                goto error;
-            }
-        }
-    }
-
-    if (sock != NULL) {
-        /* just in case the blocking state of the socket has been changed */
-        nonblocking = (sock->sock_timeout >= 0);
-        BIO_set_nbio(SSL_get_rbio(self->ssl), nonblocking);
-        BIO_set_nbio(SSL_get_wbio(self->ssl), nonblocking);
-    }
-
-    timeout = GET_SOCKET_TIMEOUT(sock);
-    has_timeout = (timeout > 0);
-    if (has_timeout)
-        deadline = _PyTime_GetMonotonicClock() + timeout;
-
-    do {
-        PySSL_BEGIN_ALLOW_THREADS
-        count = SSL_read(self->ssl, mem, len);
-        err = SSL_get_error(self->ssl, count);
-        PySSL_END_ALLOW_THREADS
-
-        if (PyErr_CheckSignals())
-            goto error;
-
-        if (has_timeout)
-            timeout = deadline - _PyTime_GetMonotonicClock();
-
-        if (err == SSL_ERROR_WANT_READ) {
-            sockstate = PySSL_select(sock, 0, timeout);
-        } else if (err == SSL_ERROR_WANT_WRITE) {
-            sockstate = PySSL_select(sock, 1, timeout);
-        } else if (err == SSL_ERROR_ZERO_RETURN &&
-                   SSL_get_shutdown(self->ssl) == SSL_RECEIVED_SHUTDOWN)
-        {
-            count = 0;
-            goto done;
-        }
-        else
-            sockstate = SOCKET_OPERATION_OK;
-
-        if (sockstate == SOCKET_HAS_TIMED_OUT) {
-            PyErr_SetString(PySocketModule.timeout_error,
-                            "The read operation timed out");
-            goto error;
-        } else if (sockstate == SOCKET_IS_NONBLOCKING) {
-            break;
-        }
-    } while (err == SSL_ERROR_WANT_READ || err == SSL_ERROR_WANT_WRITE);
-
-    if (count <= 0) {
-        PySSL_SetError(self, count, __FILE__, __LINE__);
-        goto error;
-    }
-
-done:
-    Py_XDECREF(sock);
-    if (!buf_passed) {
-        _PyBytes_Resize(&dest, count);
-        return dest;
-    }
-    else {
-        PyBuffer_Release(&buf);
-        return PyLong_FromLong(count);
-    }
-
-error:
-    Py_XDECREF(sock);
-    if (!buf_passed)
-        Py_XDECREF(dest);
-    else
-        PyBuffer_Release(&buf);
-    return NULL;
-}
-
-PyDoc_STRVAR(PySSL_SSLread_doc,
-"read([len]) -> string\n\
-\n\
-Read up to len bytes from the SSL socket.");
-
-static PyObject *PySSL_SSLshutdown(PySSLSocket *self)
-{
-    int err, ssl_err, sockstate, nonblocking;
-    int zeros = 0;
-    PySocketSockObject *sock = GET_SOCKET(self);
-    _PyTime_t timeout, deadline = 0;
-    int has_timeout;
-
-    if (sock != NULL) {
-        /* Guard against closed socket */
-        if ((((PyObject*)sock) == Py_None) || (sock->sock_fd < 0)) {
-            _setSSLError("Underlying socket connection gone",
-                         PY_SSL_ERROR_NO_SOCKET, __FILE__, __LINE__);
-            return NULL;
-        }
-        Py_INCREF(sock);
-
-        /* Just in case the blocking state of the socket has been changed */
-        nonblocking = (sock->sock_timeout >= 0);
-        BIO_set_nbio(SSL_get_rbio(self->ssl), nonblocking);
-        BIO_set_nbio(SSL_get_wbio(self->ssl), nonblocking);
-    }
-
-    timeout = GET_SOCKET_TIMEOUT(sock);
-    has_timeout = (timeout > 0);
-    if (has_timeout)
-        deadline = _PyTime_GetMonotonicClock() + timeout;
-
-    while (1) {
-        PySSL_BEGIN_ALLOW_THREADS
-        /* Disable read-ahead so that unwrap can work correctly.
-         * Otherwise OpenSSL might read in too much data,
-         * eating clear text data that happens to be
-         * transmitted after the SSL shutdown.
-         * Should be safe to call repeatedly every time this
-         * function is used and the shutdown_seen_zero != 0
-         * condition is met.
-         */
-        if (self->shutdown_seen_zero)
-            SSL_set_read_ahead(self->ssl, 0);
-        err = SSL_shutdown(self->ssl);
-        PySSL_END_ALLOW_THREADS
-
-        /* If err == 1, a secure shutdown with SSL_shutdown() is complete */
-        if (err > 0)
-            break;
-        if (err == 0) {
-            /* Don't loop endlessly; instead preserve legacy
-               behaviour of trying SSL_shutdown() only twice.
-               This looks necessary for OpenSSL < 0.9.8m */
-            if (++zeros > 1)
-                break;
-            /* Shutdown was sent, now try receiving */
-            self->shutdown_seen_zero = 1;
-            continue;
-        }
-
-        if (has_timeout)
-            timeout = deadline - _PyTime_GetMonotonicClock();
-
-        /* Possibly retry shutdown until timeout or failure */
-        ssl_err = SSL_get_error(self->ssl, err);
-        if (ssl_err == SSL_ERROR_WANT_READ)
-            sockstate = PySSL_select(sock, 0, timeout);
-        else if (ssl_err == SSL_ERROR_WANT_WRITE)
-            sockstate = PySSL_select(sock, 1, timeout);
-        else
-            break;
-
-        if (sockstate == SOCKET_HAS_TIMED_OUT) {
-            if (ssl_err == SSL_ERROR_WANT_READ)
-                PyErr_SetString(PySocketModule.timeout_error,
-                                "The read operation timed out");
-            else
-                PyErr_SetString(PySocketModule.timeout_error,
-                                "The write operation timed out");
-            goto error;
-        }
-        else if (sockstate == SOCKET_TOO_LARGE_FOR_SELECT) {
-            PyErr_SetString(PySSLErrorObject,
-                            "Underlying socket too large for select().");
-            goto error;
-        }
-        else if (sockstate != SOCKET_OPERATION_OK)
-            /* Retain the SSL error code */
-            break;
-    }
-
-    if (err < 0) {
-        Py_XDECREF(sock);
-        return PySSL_SetError(self, err, __FILE__, __LINE__);
-    }
-    if (sock)
-        /* It's already INCREF'ed */
-        return (PyObject *) sock;
-    else
-        Py_RETURN_NONE;
-
-error:
-    Py_XDECREF(sock);
-    return NULL;
-}
-
-PyDoc_STRVAR(PySSL_SSLshutdown_doc,
-"shutdown(s) -> socket\n\
-\n\
-Does the SSL shutdown handshake with the remote end, and returns\n\
-the underlying socket object.");
-
-static PyObject *
-PySSL_tls_unique_cb(PySSLSocket *self)
-{
-    PyObject *retval = NULL;
-    char buf[PySSL_CB_MAXLEN];
-    size_t len;
-
-    if (SSL_session_reused(self->ssl) ^ !self->socket_type) {
-        /* if session is resumed XOR we are the client */
-        len = SSL_get_finished(self->ssl, buf, PySSL_CB_MAXLEN);
-    }
-    else {
-        /* if a new session XOR we are the server */
-        len = SSL_get_peer_finished(self->ssl, buf, PySSL_CB_MAXLEN);
-    }
-
-    /* It cannot be negative in current OpenSSL version as of July 2011 */
-    if (len == 0)
-        Py_RETURN_NONE;
-
-    retval = PyBytes_FromStringAndSize(buf, len);
-
-    return retval;
-}
-
-PyDoc_STRVAR(PySSL_tls_unique_cb_doc,
-"tls_unique_cb() -> bytes\n\
-\n\
-Returns the 'tls-unique' channel binding data, as defined by RFC 5929.\n\
-\n\
-If the TLS handshake is not yet complete, None is returned");
-
-static PyGetSetDef ssl_getsetlist[] = {
-    {"context", (getter) PySSL_get_context,
-                (setter) PySSL_set_context, PySSL_set_context_doc},
-    {"server_side", (getter) PySSL_get_server_side, NULL,
-                    PySSL_get_server_side_doc},
-    {"server_hostname", (getter) PySSL_get_server_hostname, NULL,
-                        PySSL_get_server_hostname_doc},
-    {"owner", (getter) PySSL_get_owner, (setter) PySSL_set_owner,
-              PySSL_get_owner_doc},
-    {NULL},            /* sentinel */
-};
-
-static PyMethodDef PySSLMethods[] = {
-    {"do_handshake", (PyCFunction)PySSL_SSLdo_handshake, METH_NOARGS},
-    {"write", (PyCFunction)PySSL_SSLwrite, METH_VARARGS,
-     PySSL_SSLwrite_doc},
-    {"read", (PyCFunction)PySSL_SSLread, METH_VARARGS,
-     PySSL_SSLread_doc},
-    {"pending", (PyCFunction)PySSL_SSLpending, METH_NOARGS,
-     PySSL_SSLpending_doc},
-    {"peer_certificate", (PyCFunction)PySSL_peercert, METH_VARARGS,
-     PySSL_peercert_doc},
-    {"cipher", (PyCFunction)PySSL_cipher, METH_NOARGS},
-    {"shared_ciphers", (PyCFunction)PySSL_shared_ciphers, METH_NOARGS},
-    {"version", (PyCFunction)PySSL_version, METH_NOARGS},
-#ifdef OPENSSL_NPN_NEGOTIATED
-    {"selected_npn_protocol", (PyCFunction)PySSL_selected_npn_protocol, METH_NOARGS},
-#endif
-#ifdef HAVE_ALPN
-    {"selected_alpn_protocol", (PyCFunction)PySSL_selected_alpn_protocol, METH_NOARGS},
-#endif
-    {"compression", (PyCFunction)PySSL_compression, METH_NOARGS},
-    {"shutdown", (PyCFunction)PySSL_SSLshutdown, METH_NOARGS,
-     PySSL_SSLshutdown_doc},
-    {"tls_unique_cb", (PyCFunction)PySSL_tls_unique_cb, METH_NOARGS,
-     PySSL_tls_unique_cb_doc},
-    {NULL, NULL}
-};
-
-static PyTypeObject PySSLSocket_Type = {
-    PyVarObject_HEAD_INIT(NULL, 0)
-    "_ssl._SSLSocket",                  /*tp_name*/
-    sizeof(PySSLSocket),                /*tp_basicsize*/
-    0,                                  /*tp_itemsize*/
-    /* methods */
-    (destructor)PySSL_dealloc,          /*tp_dealloc*/
-    0,                                  /*tp_print*/
-    0,                                  /*tp_getattr*/
-    0,                                  /*tp_setattr*/
-    0,                                  /*tp_reserved*/
-    0,                                  /*tp_repr*/
-    0,                                  /*tp_as_number*/
-    0,                                  /*tp_as_sequence*/
-    0,                                  /*tp_as_mapping*/
-    0,                                  /*tp_hash*/
-    0,                                  /*tp_call*/
-    0,                                  /*tp_str*/
-    0,                                  /*tp_getattro*/
-    0,                                  /*tp_setattro*/
-    0,                                  /*tp_as_buffer*/
-    Py_TPFLAGS_DEFAULT,                 /*tp_flags*/
-    0,                                  /*tp_doc*/
-    0,                                  /*tp_traverse*/
-    0,                                  /*tp_clear*/
-    0,                                  /*tp_richcompare*/
-    0,                                  /*tp_weaklistoffset*/
-    0,                                  /*tp_iter*/
-    0,                                  /*tp_iternext*/
-    PySSLMethods,                       /*tp_methods*/
-    0,                                  /*tp_members*/
-    ssl_getsetlist,                     /*tp_getset*/
-};
-
-
-/*
- * _SSLContext objects
- */
-
-static PyObject *
-context_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
-{
-    char *kwlist[] = {"protocol", NULL};
-    PySSLContext *self;
-    int proto_version = PY_SSL_VERSION_SSL23;
-    long options;
-    SSL_CTX *ctx = NULL;
-
-    if (!PyArg_ParseTupleAndKeywords(
-        args, kwds, "i:_SSLContext", kwlist,
-        &proto_version))
-        return NULL;
-
-    PySSL_BEGIN_ALLOW_THREADS
-    if (proto_version == PY_SSL_VERSION_TLS1)
-        ctx = SSL_CTX_new(TLSv1_method());
-#if HAVE_TLSv1_2
-    else if (proto_version == PY_SSL_VERSION_TLS1_1)
-        ctx = SSL_CTX_new(TLSv1_1_method());
-    else if (proto_version == PY_SSL_VERSION_TLS1_2)
-        ctx = SSL_CTX_new(TLSv1_2_method());
-#endif
-#ifndef OPENSSL_NO_SSL3
-    else if (proto_version == PY_SSL_VERSION_SSL3)
-        ctx = SSL_CTX_new(SSLv3_method());
-#endif
-#ifndef OPENSSL_NO_SSL2
-    else if (proto_version == PY_SSL_VERSION_SSL2)
-        ctx = SSL_CTX_new(SSLv2_method());
-#endif
-    else if (proto_version == PY_SSL_VERSION_SSL23)
-        ctx = SSL_CTX_new(SSLv23_method());
-    else
-        proto_version = -1;
-    PySSL_END_ALLOW_THREADS
-
-    if (proto_version == -1) {
-        PyErr_SetString(PyExc_ValueError,
-                        "invalid protocol version");
-        return NULL;
-    }
-    if (ctx == NULL) {
-        PyErr_SetString(PySSLErrorObject,
-                        "failed to allocate SSL context");
-        return NULL;
-    }
-
-    assert(type != NULL && type->tp_alloc != NULL);
-    self = (PySSLContext *) type->tp_alloc(type, 0);
-    if (self == NULL) {
-        SSL_CTX_free(ctx);
-        return NULL;
-    }
-    self->ctx = ctx;
-#ifdef OPENSSL_NPN_NEGOTIATED
-    self->npn_protocols = NULL;
-#endif
-#ifdef HAVE_ALPN
-    self->alpn_protocols = NULL;
-#endif
-#ifndef OPENSSL_NO_TLSEXT
-    self->set_hostname = NULL;
-#endif
-    /* Don't check host name by default */
-    self->check_hostname = 0;
-    /* Defaults */
-    SSL_CTX_set_verify(self->ctx, SSL_VERIFY_NONE, NULL);
-    options = SSL_OP_ALL & ~SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS;
-    if (proto_version != PY_SSL_VERSION_SSL2)
-        options |= SSL_OP_NO_SSLv2;
-    SSL_CTX_set_options(self->ctx, options);
-
-#ifndef OPENSSL_NO_ECDH
-    /* Allow automatic ECDH curve selection (on OpenSSL 1.0.2+), or use
-       prime256v1 by default.  This is Apache mod_ssl's initialization
-       policy, so we should be safe. */
-#if defined(SSL_CTX_set_ecdh_auto)
-    SSL_CTX_set_ecdh_auto(self->ctx, 1);
-#else
-    {
-        EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
-        SSL_CTX_set_tmp_ecdh(self->ctx, key);
-        EC_KEY_free(key);
-    }
-#endif
-#endif
-
-#define SID_CTX "Python"
-    SSL_CTX_set_session_id_context(self->ctx, (const unsigned char *) SID_CTX,
-                                   sizeof(SID_CTX));
-#undef SID_CTX
-
-#ifdef X509_V_FLAG_TRUSTED_FIRST
-    {
-        /* Improve trust chain building when cross-signed intermediate
-           certificates are present. See https://bugs.python.org/issue23476. */
-        X509_STORE *store = SSL_CTX_get_cert_store(self->ctx);
-        X509_STORE_set_flags(store, X509_V_FLAG_TRUSTED_FIRST);
-    }
-#endif
-
-    return (PyObject *)self;
-}
-
-static int
-context_traverse(PySSLContext *self, visitproc visit, void *arg)
-{
-#ifndef OPENSSL_NO_TLSEXT
-    Py_VISIT(self->set_hostname);
-#endif
-    return 0;
-}
-
-static int
-context_clear(PySSLContext *self)
-{
-#ifndef OPENSSL_NO_TLSEXT
-    Py_CLEAR(self->set_hostname);
-#endif
-    return 0;
-}
-
-static void
-context_dealloc(PySSLContext *self)
-{
-    context_clear(self);
-    SSL_CTX_free(self->ctx);
-#ifdef OPENSSL_NPN_NEGOTIATED
-    PyMem_FREE(self->npn_protocols);
-#endif
-#ifdef HAVE_ALPN
-    PyMem_FREE(self->alpn_protocols);
-#endif
-    Py_TYPE(self)->tp_free(self);
-}
-
-static PyObject *
-set_ciphers(PySSLContext *self, PyObject *args)
-{
-    int ret;
-    const char *cipherlist;
-
-    if (!PyArg_ParseTuple(args, "s:set_ciphers", &cipherlist))
-        return NULL;
-    ret = SSL_CTX_set_cipher_list(self->ctx, cipherlist);
-    if (ret == 0) {
-        /* Clearing the error queue is necessary on some OpenSSL versions,
-           otherwise the error will be reported again when another SSL call
-           is done. */
-        ERR_clear_error();
-        PyErr_SetString(PySSLErrorObject,
-                        "No cipher can be selected.");
-        return NULL;
-    }
-    Py_RETURN_NONE;
-}
-
-#ifdef OPENSSL_NPN_NEGOTIATED
-static int
-do_protocol_selection(int alpn, unsigned char **out, unsigned char *outlen,
-                      const unsigned char *server_protocols, unsigned int server_protocols_len,
-                      const unsigned char *client_protocols, unsigned int client_protocols_len)
-{
-    int ret;
-    if (client_protocols == NULL) {
-        client_protocols = (unsigned char *)"";
-        client_protocols_len = 0;
-    }
-    if (server_protocols == NULL) {
-        server_protocols = (unsigned char *)"";
-        server_protocols_len = 0;
-    }
-
-    ret = SSL_select_next_proto(out, outlen,
-                                server_protocols, server_protocols_len,
-                                client_protocols, client_protocols_len);
-    if (alpn && ret != OPENSSL_NPN_NEGOTIATED)
-        return SSL_TLSEXT_ERR_NOACK;
-
-    return SSL_TLSEXT_ERR_OK;
-}
-
-/* this callback gets passed to SSL_CTX_set_next_protos_advertise_cb */
-static int
-_advertiseNPN_cb(SSL *s,
-                 const unsigned char **data, unsigned int *len,
-                 void *args)
-{
-    PySSLContext *ssl_ctx = (PySSLContext *) args;
-
-    if (ssl_ctx->npn_protocols == NULL) {
-        *data = (unsigned char *)"";
-        *len = 0;
-    } else {
-        *data = ssl_ctx->npn_protocols;
-        *len = ssl_ctx->npn_protocols_len;
-    }
-
-    return SSL_TLSEXT_ERR_OK;
-}
-/* this callback gets passed to SSL_CTX_set_next_proto_select_cb */
-static int
-_selectNPN_cb(SSL *s,
-              unsigned char **out, unsigned char *outlen,
-              const unsigned char *server, unsigned int server_len,
-              void *args)
-{
-    PySSLContext *ctx = (PySSLContext *)args;
-    return do_protocol_selection(0, out, outlen, server, server_len,
-                                 ctx->npn_protocols, ctx->npn_protocols_len);
-}
-#endif
-
-static PyObject *
-_set_npn_protocols(PySSLContext *self, PyObject *args)
-{
-#ifdef OPENSSL_NPN_NEGOTIATED
-    Py_buffer protos;
-
-    if (!PyArg_ParseTuple(args, "y*:set_npn_protocols", &protos))
-        return NULL;
-
-    if (self->npn_protocols != NULL) {
-        PyMem_Free(self->npn_protocols);
-    }
-
-    self->npn_protocols = PyMem_Malloc(protos.len);
-    if (self->npn_protocols == NULL) {
-        PyBuffer_Release(&protos);
-        return PyErr_NoMemory();
-    }
-    memcpy(self->npn_protocols, protos.buf, protos.len);
-    self->npn_protocols_len = (int) protos.len;
-
-    /* set both server and client callbacks, because the context can
-     * be used to create both types of sockets */
-    SSL_CTX_set_next_protos_advertised_cb(self->ctx,
-                                          _advertiseNPN_cb,
-                                          self);
-    SSL_CTX_set_next_proto_select_cb(self->ctx,
-                                     _selectNPN_cb,
-                                     self);
-
-    PyBuffer_Release(&protos);
-    Py_RETURN_NONE;
-#else
-    PyErr_SetString(PyExc_NotImplementedError,
-                    "The NPN extension requires OpenSSL 1.0.1 or later.");
-    return NULL;
-#endif
-}
-
-#ifdef HAVE_ALPN
-static int
-_selectALPN_cb(SSL *s,
-              const unsigned char **out, unsigned char *outlen,
-              const unsigned char *client_protocols, unsigned int client_protocols_len,
-              void *args)
-{
-    PySSLContext *ctx = (PySSLContext *)args;
-    return do_protocol_selection(1, (unsigned char **)out, outlen,
-                                 ctx->alpn_protocols, ctx->alpn_protocols_len,
-                                 client_protocols, client_protocols_len);
-}
-#endif
-
-static PyObject *
-_set_alpn_protocols(PySSLContext *self, PyObject *args)
-{
-#ifdef HAVE_ALPN
-    Py_buffer protos;
-
-    if (!PyArg_ParseTuple(args, "y*:set_npn_protocols", &protos))
-        return NULL;
-
-    PyMem_FREE(self->alpn_protocols);
-    self->alpn_protocols = PyMem_Malloc(protos.len);
-    if (!self->alpn_protocols)
-        return PyErr_NoMemory();
-    memcpy(self->alpn_protocols, protos.buf, protos.len);
-    self->alpn_protocols_len = protos.len;
-    PyBuffer_Release(&protos);
-
-    if (SSL_CTX_set_alpn_protos(self->ctx, self->alpn_protocols, self->alpn_protocols_len))
-        return PyErr_NoMemory();
-    SSL_CTX_set_alpn_select_cb(self->ctx, _selectALPN_cb, self);
-
-    PyBuffer_Release(&protos);
-    Py_RETURN_NONE;
-#else
-    PyErr_SetString(PyExc_NotImplementedError,
-                    "The ALPN extension requires OpenSSL 1.0.2 or later.");
-    return NULL;
-#endif
-}
-
-static PyObject *
-get_verify_mode(PySSLContext *self, void *c)
-{
-    switch (SSL_CTX_get_verify_mode(self->ctx)) {
-    case SSL_VERIFY_NONE:
-        return PyLong_FromLong(PY_SSL_CERT_NONE);
-    case SSL_VERIFY_PEER:
-        return PyLong_FromLong(PY_SSL_CERT_OPTIONAL);
-    case SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT:
-        return PyLong_FromLong(PY_SSL_CERT_REQUIRED);
-    }
-    PyErr_SetString(PySSLErrorObject,
-                    "invalid return value from SSL_CTX_get_verify_mode");
-    return NULL;
-}
-
-static int
-set_verify_mode(PySSLContext *self, PyObject *arg, void *c)
-{
-    int n, mode;
-    if (!PyArg_Parse(arg, "i", &n))
-        return -1;
-    if (n == PY_SSL_CERT_NONE)
-        mode = SSL_VERIFY_NONE;
-    else if (n == PY_SSL_CERT_OPTIONAL)
-        mode = SSL_VERIFY_PEER;
-    else if (n == PY_SSL_CERT_REQUIRED)
-        mode = SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
-    else {
-        PyErr_SetString(PyExc_ValueError,
-                        "invalid value for verify_mode");
-        return -1;
-    }
-    if (mode == SSL_VERIFY_NONE && self->check_hostname) {
-        PyErr_SetString(PyExc_ValueError,
-                        "Cannot set verify_mode to CERT_NONE when "
-                        "check_hostname is enabled.");
-        return -1;
-    }
-    SSL_CTX_set_verify(self->ctx, mode, NULL);
-    return 0;
-}
-
-static PyObject *
-get_verify_flags(PySSLContext *self, void *c)
-{
-    X509_STORE *store;
-    unsigned long flags;
-
-    store = SSL_CTX_get_cert_store(self->ctx);
-    flags = X509_VERIFY_PARAM_get_flags(store->param);
-    return PyLong_FromUnsignedLong(flags);
-}
-
-static int
-set_verify_flags(PySSLContext *self, PyObject *arg, void *c)
-{
-    X509_STORE *store;
-    unsigned long new_flags, flags, set, clear;
-
-    if (!PyArg_Parse(arg, "k", &new_flags))
-        return -1;
-    store = SSL_CTX_get_cert_store(self->ctx);
-    flags = X509_VERIFY_PARAM_get_flags(store->param);
-    clear = flags & ~new_flags;
-    set = ~flags & new_flags;
-    if (clear) {
-        if (!X509_VERIFY_PARAM_clear_flags(store->param, clear)) {
-            _setSSLError(NULL, 0, __FILE__, __LINE__);
-            return -1;
-        }
-    }
-    if (set) {
-        if (!X509_VERIFY_PARAM_set_flags(store->param, set)) {
-            _setSSLError(NULL, 0, __FILE__, __LINE__);
-            return -1;
-        }
-    }
-    return 0;
-}
-
-static PyObject *
-get_options(PySSLContext *self, void *c)
-{
-    return PyLong_FromLong(SSL_CTX_get_options(self->ctx));
-}
-
-static int
-set_options(PySSLContext *self, PyObject *arg, void *c)
-{
-    long new_opts, opts, set, clear;
-    if (!PyArg_Parse(arg, "l", &new_opts))
-        return -1;
-    opts = SSL_CTX_get_options(self->ctx);
-    clear = opts & ~new_opts;
-    set = ~opts & new_opts;
-    if (clear) {
-#ifdef HAVE_SSL_CTX_CLEAR_OPTIONS
-        SSL_CTX_clear_options(self->ctx, clear);
-#else
-        PyErr_SetString(PyExc_ValueError,
-                        "can't clear options before OpenSSL 0.9.8m");
-        return -1;
-#endif
-    }
-    if (set)
-        SSL_CTX_set_options(self->ctx, set);
-    return 0;
-}
-
-static PyObject *
-get_check_hostname(PySSLContext *self, void *c)
-{
-    return PyBool_FromLong(self->check_hostname);
-}
-
-static int
-set_check_hostname(PySSLContext *self, PyObject *arg, void *c)
-{
-    int check_hostname;
-    if (!PyArg_Parse(arg, "p", &check_hostname))
-        return -1;
-    if (check_hostname &&
-            SSL_CTX_get_verify_mode(self->ctx) == SSL_VERIFY_NONE) {
-        PyErr_SetString(PyExc_ValueError,
-                        "check_hostname needs a SSL context with either "
-                        "CERT_OPTIONAL or CERT_REQUIRED");
-        return -1;
-    }
-    self->check_hostname = check_hostname;
-    return 0;
-}
-
-
-typedef struct {
-    PyThreadState *thread_state;
-    PyObject *callable;
-    char *password;
-    int size;
-    int error;
-} _PySSLPasswordInfo;
-
-static int
-_pwinfo_set(_PySSLPasswordInfo *pw_info, PyObject* password,
-            const char *bad_type_error)
-{
-    /* Set the password and size fields of a _PySSLPasswordInfo struct
-       from a unicode, bytes, or byte array object.
-       The password field will be dynamically allocated and must be freed
-       by the caller */
-    PyObject *password_bytes = NULL;
-    const char *data = NULL;
-    Py_ssize_t size;
-
-    if (PyUnicode_Check(password)) {
-        password_bytes = PyUnicode_AsEncodedString(password, NULL, NULL);
-        if (!password_bytes) {
-            goto error;
-        }
-        data = PyBytes_AS_STRING(password_bytes);
-        size = PyBytes_GET_SIZE(password_bytes);
-    } else if (PyBytes_Check(password)) {
-        data = PyBytes_AS_STRING(password);
-        size = PyBytes_GET_SIZE(password);
-    } else if (PyByteArray_Check(password)) {
-        data = PyByteArray_AS_STRING(password);
-        size = PyByteArray_GET_SIZE(password);
-    } else {
-        PyErr_SetString(PyExc_TypeError, bad_type_error);
-        goto error;
-    }
-
-    if (size > (Py_ssize_t)INT_MAX) {
-        PyErr_Format(PyExc_ValueError,
-                     "password cannot be longer than %d bytes", INT_MAX);
-        goto error;
-    }
-
-    PyMem_Free(pw_info->password);
-    pw_info->password = PyMem_Malloc(size);
-    if (!pw_info->password) {
-        PyErr_SetString(PyExc_MemoryError,
-                        "unable to allocate password buffer");
-        goto error;
-    }
-    memcpy(pw_info->password, data, size);
-    pw_info->size = (int)size;
-
-    Py_XDECREF(password_bytes);
-    return 1;
-
-error:
-    Py_XDECREF(password_bytes);
-    return 0;
-}
-
-static int
-_password_callback(char *buf, int size, int rwflag, void *userdata)
-{
-    _PySSLPasswordInfo *pw_info = (_PySSLPasswordInfo*) userdata;
-    PyObject *fn_ret = NULL;
-
-    PySSL_END_ALLOW_THREADS_S(pw_info->thread_state);
-
-    if (pw_info->callable) {
-        fn_ret = PyObject_CallFunctionObjArgs(pw_info->callable, NULL);
-        if (!fn_ret) {
-            /* TODO: It would be nice to move _ctypes_add_traceback() into the
-               core python API, so we could use it to add a frame here */
-            goto error;
-        }
-
-        if (!_pwinfo_set(pw_info, fn_ret,
-                         "password callback must return a string")) {
-            goto error;
-        }
-        Py_CLEAR(fn_ret);
-    }
-
-    if (pw_info->size > size) {
-        PyErr_Format(PyExc_ValueError,
-                     "password cannot be longer than %d bytes", size);
-        goto error;
-    }
-
-    PySSL_BEGIN_ALLOW_THREADS_S(pw_info->thread_state);
-    memcpy(buf, pw_info->password, pw_info->size);
-    return pw_info->size;
-
-error:
-    Py_XDECREF(fn_ret);
-    PySSL_BEGIN_ALLOW_THREADS_S(pw_info->thread_state);
-    pw_info->error = 1;
-    return -1;
-}
-
-static PyObject *
-load_cert_chain(PySSLContext *self, PyObject *args, PyObject *kwds)
-{
-    char *kwlist[] = {"certfile", "keyfile", "password", NULL};
-    PyObject *certfile, *keyfile = NULL, *password = NULL;
-    PyObject *certfile_bytes = NULL, *keyfile_bytes = NULL;
-    pem_password_cb *orig_passwd_cb = self->ctx->default_passwd_callback;
-    void *orig_passwd_userdata = self->ctx->default_passwd_callback_userdata;
-    _PySSLPasswordInfo pw_info = { NULL, NULL, NULL, 0, 0 };
-    int r;
-
-    errno = 0;
-    ERR_clear_error();
-    if (!PyArg_ParseTupleAndKeywords(args, kwds,
-        "O|OO:load_cert_chain", kwlist,
-        &certfile, &keyfile, &password))
-        return NULL;
-    if (keyfile == Py_None)
-        keyfile = NULL;
-    if (!PyUnicode_FSConverter(certfile, &certfile_bytes)) {
-        PyErr_SetString(PyExc_TypeError,
-                        "certfile should be a valid filesystem path");
-        return NULL;
-    }
-    if (keyfile && !PyUnicode_FSConverter(keyfile, &keyfile_bytes)) {
-        PyErr_SetString(PyExc_TypeError,
-                        "keyfile should be a valid filesystem path");
-        goto error;
-    }
-    if (password && password != Py_None) {
-        if (PyCallable_Check(password)) {
-            pw_info.callable = password;
-        } else if (!_pwinfo_set(&pw_info, password,
-                                "password should be a string or callable")) {
-            goto error;
-        }
-        SSL_CTX_set_default_passwd_cb(self->ctx, _password_callback);
-        SSL_CTX_set_default_passwd_cb_userdata(self->ctx, &pw_info);
-    }
-    PySSL_BEGIN_ALLOW_THREADS_S(pw_info.thread_state);
-    r = SSL_CTX_use_certificate_chain_file(self->ctx,
-        PyBytes_AS_STRING(certfile_bytes));
-    PySSL_END_ALLOW_THREADS_S(pw_info.thread_state);
-    if (r != 1) {
-        if (pw_info.error) {
-            ERR_clear_error();
-            /* the password callback has already set the error information */
-        }
-        else if (errno != 0) {
-            ERR_clear_error();
-            PyErr_SetFromErrno(PyExc_IOError);
-        }
-        else {
-            _setSSLError(NULL, 0, __FILE__, __LINE__);
-        }
-        goto error;
-    }
-    PySSL_BEGIN_ALLOW_THREADS_S(pw_info.thread_state);
-    r = SSL_CTX_use_PrivateKey_file(self->ctx,
-        PyBytes_AS_STRING(keyfile ? keyfile_bytes : certfile_bytes),
-        SSL_FILETYPE_PEM);
-    PySSL_END_ALLOW_THREADS_S(pw_info.thread_state);
-    Py_CLEAR(keyfile_bytes);
-    Py_CLEAR(certfile_bytes);
-    if (r != 1) {
-        if (pw_info.error) {
-            ERR_clear_error();
-            /* the password callback has already set the error information */
-        }
-        else if (errno != 0) {
-            ERR_clear_error();
-            PyErr_SetFromErrno(PyExc_IOError);
-        }
-        else {
-            _setSSLError(NULL, 0, __FILE__, __LINE__);
-        }
-        goto error;
-    }
-    PySSL_BEGIN_ALLOW_THREADS_S(pw_info.thread_state);
-    r = SSL_CTX_check_private_key(self->ctx);
-    PySSL_END_ALLOW_THREADS_S(pw_info.thread_state);
-    if (r != 1) {
-        _setSSLError(NULL, 0, __FILE__, __LINE__);
-        goto error;
-    }
-    SSL_CTX_set_default_passwd_cb(self->ctx, orig_passwd_cb);
-    SSL_CTX_set_default_passwd_cb_userdata(self->ctx, orig_passwd_userdata);
-    PyMem_Free(pw_info.password);
-    Py_RETURN_NONE;
-
-error:
-    SSL_CTX_set_default_passwd_cb(self->ctx, orig_passwd_cb);
-    SSL_CTX_set_default_passwd_cb_userdata(self->ctx, orig_passwd_userdata);
-    PyMem_Free(pw_info.password);
-    Py_XDECREF(keyfile_bytes);
-    Py_XDECREF(certfile_bytes);
-    return NULL;
-}
-
-/* internal helper function, returns -1 on error
- */
-static int
-_add_ca_certs(PySSLContext *self, void *data, Py_ssize_t len,
-              int filetype)
-{
-    BIO *biobuf = NULL;
-    X509_STORE *store;
-    int retval = 0, err, loaded = 0;
-
-    assert(filetype == SSL_FILETYPE_ASN1 || filetype == SSL_FILETYPE_PEM);
-
-    if (len <= 0) {
-        PyErr_SetString(PyExc_ValueError,
-                        "Empty certificate data");
-        return -1;
-    } else if (len > INT_MAX) {
-        PyErr_SetString(PyExc_OverflowError,
-                        "Certificate data is too long.");
-        return -1;
-    }
-
-    biobuf = BIO_new_mem_buf(data, (int)len);
-    if (biobuf == NULL) {
-        _setSSLError("Can't allocate buffer", 0, __FILE__, __LINE__);
-        return -1;
-    }
-
-    store = SSL_CTX_get_cert_store(self->ctx);
-    assert(store != NULL);
-
-    while (1) {
-        X509 *cert = NULL;
-        int r;
-
-        if (filetype == SSL_FILETYPE_ASN1) {
-            cert = d2i_X509_bio(biobuf, NULL);
-        } else {
-            cert = PEM_read_bio_X509(biobuf, NULL,
-                                     self->ctx->default_passwd_callback,
-                                     self->ctx->default_passwd_callback_userdata);
-        }
-        if (cert == NULL) {
-            break;
-        }
-        r = X509_STORE_add_cert(store, cert);
-        X509_free(cert);
-        if (!r) {
-            err = ERR_peek_last_error();
-            if ((ERR_GET_LIB(err) == ERR_LIB_X509) &&
-                (ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE)) {
-                /* cert already in hash table, not an error */
-                ERR_clear_error();
-            } else {
-                break;
-            }
-        }
-        loaded++;
-    }
-
-    err = ERR_peek_last_error();
-    if ((filetype == SSL_FILETYPE_ASN1) &&
-            (loaded > 0) &&
-            (ERR_GET_LIB(err) == ERR_LIB_ASN1) &&
-            (ERR_GET_REASON(err) == ASN1_R_HEADER_TOO_LONG)) {
-        /* EOF ASN1 file, not an error */
-        ERR_clear_error();
-        retval = 0;
-    } else if ((filetype == SSL_FILETYPE_PEM) &&
-                   (loaded > 0) &&
-                   (ERR_GET_LIB(err) == ERR_LIB_PEM) &&
-                   (ERR_GET_REASON(err) == PEM_R_NO_START_LINE)) {
-        /* EOF PEM file, not an error */
-        ERR_clear_error();
-        retval = 0;
-    } else {
-        _setSSLError(NULL, 0, __FILE__, __LINE__);
-        retval = -1;
-    }
-
-    BIO_free(biobuf);
-    return retval;
-}
-
-
-static PyObject *
-load_verify_locations(PySSLContext *self, PyObject *args, PyObject *kwds)
-{
-    char *kwlist[] = {"cafile", "capath", "cadata", NULL};
-    PyObject *cafile = NULL, *capath = NULL, *cadata = NULL;
-    PyObject *cafile_bytes = NULL, *capath_bytes = NULL;
-    const char *cafile_buf = NULL, *capath_buf = NULL;
-    int r = 0, ok = 1;
-
-    errno = 0;
-    if (!PyArg_ParseTupleAndKeywords(args, kwds,
-        "|OOO:load_verify_locations", kwlist,
-        &cafile, &capath, &cadata))
-        return NULL;
-
-    if (cafile == Py_None)
-        cafile = NULL;
-    if (capath == Py_None)
-        capath = NULL;
-    if (cadata == Py_None)
-        cadata = NULL;
-
-    if (cafile == NULL && capath == NULL && cadata == NULL) {
-        PyErr_SetString(PyExc_TypeError,
-                        "cafile, capath and cadata cannot be all omitted");
-        goto error;
-    }
-    if (cafile && !PyUnicode_FSConverter(cafile, &cafile_bytes)) {
-        PyErr_SetString(PyExc_TypeError,
-                        "cafile should be a valid filesystem path");
-        goto error;
-    }
-    if (capath && !PyUnicode_FSConverter(capath, &capath_bytes)) {
-        PyErr_SetString(PyExc_TypeError,
-                        "capath should be a valid filesystem path");
-        goto error;
-    }
-
-    /* validata cadata type and load cadata */
-    if (cadata) {
-        Py_buffer buf;
-        PyObject *cadata_ascii = NULL;
-
-        if (PyObject_GetBuffer(cadata, &buf, PyBUF_SIMPLE) == 0) {
-            if (!PyBuffer_IsContiguous(&buf, 'C') || buf.ndim > 1) {
-                PyBuffer_Release(&buf);
-                PyErr_SetString(PyExc_TypeError,
-                                "cadata should be a contiguous buffer with "
-                                "a single dimension");
-                goto error;
-            }
-            r = _add_ca_certs(self, buf.buf, buf.len, SSL_FILETYPE_ASN1);
-            PyBuffer_Release(&buf);
-            if (r == -1) {
-                goto error;
-            }
-        } else {
-            PyErr_Clear();
-            cadata_ascii = PyUnicode_AsASCIIString(cadata);
-            if (cadata_ascii == NULL) {
-                PyErr_SetString(PyExc_TypeError,
-                                "cadata should be a ASCII string or a "
-                                "bytes-like object");
-                goto error;
-            }
-            r = _add_ca_certs(self,
-                              PyBytes_AS_STRING(cadata_ascii),
-                              PyBytes_GET_SIZE(cadata_ascii),
-                              SSL_FILETYPE_PEM);
-            Py_DECREF(cadata_ascii);
-            if (r == -1) {
-                goto error;
-            }
-        }
-    }
-
-    /* load cafile or capath */
-    if (cafile || capath) {
-        if (cafile)
-            cafile_buf = PyBytes_AS_STRING(cafile_bytes);
-        if (capath)
-            capath_buf = PyBytes_AS_STRING(capath_bytes);
-        PySSL_BEGIN_ALLOW_THREADS
-        r = SSL_CTX_load_verify_locations(self->ctx, cafile_buf, capath_buf);
-        PySSL_END_ALLOW_THREADS
-        if (r != 1) {
-            ok = 0;
-            if (errno != 0) {
-                ERR_clear_error();
-                PyErr_SetFromErrno(PyExc_IOError);
-            }
-            else {
-                _setSSLError(NULL, 0, __FILE__, __LINE__);
-            }
-            goto error;
-        }
-    }
-    goto end;
-
-  error:
-    ok = 0;
-  end:
-    Py_XDECREF(cafile_bytes);
-    Py_XDECREF(capath_bytes);
-    if (ok) {
-        Py_RETURN_NONE;
-    } else {
-        return NULL;
-    }
-}
-
-static PyObject *
-load_dh_params(PySSLContext *self, PyObject *filepath)
-{
-    FILE *f;
-    DH *dh;
-
-    f = _Py_fopen_obj(filepath, "rb");
-    if (f == NULL)
-        return NULL;
-
-    errno = 0;
-    PySSL_BEGIN_ALLOW_THREADS
-    dh = PEM_read_DHparams(f, NULL, NULL, NULL);
-    fclose(f);
-    PySSL_END_ALLOW_THREADS
-    if (dh == NULL) {
-        if (errno != 0) {
-            ERR_clear_error();
-            PyErr_SetFromErrnoWithFilenameObject(PyExc_OSError, filepath);
-        }
-        else {
-            _setSSLError(NULL, 0, __FILE__, __LINE__);
-        }
-        return NULL;
-    }
-    if (SSL_CTX_set_tmp_dh(self->ctx, dh) == 0)
-        _setSSLError(NULL, 0, __FILE__, __LINE__);
-    DH_free(dh);
-    Py_RETURN_NONE;
-}
-
-static PyObject *
-context_wrap_socket(PySSLContext *self, PyObject *args, PyObject *kwds)
-{
-    char *kwlist[] = {"sock", "server_side", "server_hostname", NULL};
-    PySocketSockObject *sock;
-    int server_side = 0;
-    char *hostname = NULL;
-    PyObject *hostname_obj, *res;
-
-    /* server_hostname is either None (or absent), or to be encoded
-       using the idna encoding. */
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, "O!i|O!:_wrap_socket", kwlist,
-                                     PySocketModule.Sock_Type,
-                                     &sock, &server_side,
-                                     Py_TYPE(Py_None), &hostname_obj)) {
-        PyErr_Clear();
-        if (!PyArg_ParseTupleAndKeywords(args, kwds, "O!iet:_wrap_socket", kwlist,
-            PySocketModule.Sock_Type,
-            &sock, &server_side,
-            "idna", &hostname))
-            return NULL;
-    }
-
-    res = (PyObject *) newPySSLSocket(self, sock, server_side, hostname,
-                                      NULL, NULL);
-    if (hostname != NULL)
-        PyMem_Free(hostname);
-    return res;
-}
-
-static PyObject *
-context_wrap_bio(PySSLContext *self, PyObject *args, PyObject *kwds)
-{
-    char *kwlist[] = {"incoming", "outgoing", "server_side",
-                      "server_hostname", NULL};
-    int server_side;
-    char *hostname = NULL;
-    PyObject *hostname_obj = Py_None, *res;
-    PySSLMemoryBIO *incoming, *outgoing;
-
-    /* server_hostname is either None (or absent), or to be encoded
-       using the idna encoding. */
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, "O!O!i|O:_wrap_bio", kwlist,
-                                     &PySSLMemoryBIO_Type, &incoming,
-                                     &PySSLMemoryBIO_Type, &outgoing,
-                                     &server_side, &hostname_obj))
-        return NULL;
-    if (hostname_obj != Py_None) {
-        if (!PyArg_Parse(hostname_obj, "et", "idna", &hostname))
-            return NULL;
-    }
-
-    res = (PyObject *) newPySSLSocket(self, NULL, server_side, hostname,
-                                      incoming, outgoing);
-
-    PyMem_Free(hostname);
-    return res;
-}
-
-static PyObject *
-session_stats(PySSLContext *self, PyObject *unused)
-{
-    int r;
-    PyObject *value, *stats = PyDict_New();
-    if (!stats)
-        return NULL;
-
-#define ADD_STATS(SSL_NAME, KEY_NAME) \
-    value = PyLong_FromLong(SSL_CTX_sess_ ## SSL_NAME (self->ctx)); \
-    if (value == NULL) \
-        goto error; \
-    r = PyDict_SetItemString(stats, KEY_NAME, value); \
-    Py_DECREF(value); \
-    if (r < 0) \
-        goto error;
-
-    ADD_STATS(number, "number");
-    ADD_STATS(connect, "connect");
-    ADD_STATS(connect_good, "connect_good");
-    ADD_STATS(connect_renegotiate, "connect_renegotiate");
-    ADD_STATS(accept, "accept");
-    ADD_STATS(accept_good, "accept_good");
-    ADD_STATS(accept_renegotiate, "accept_renegotiate");
-    ADD_STATS(accept, "accept");
-    ADD_STATS(hits, "hits");
-    ADD_STATS(misses, "misses");
-    ADD_STATS(timeouts, "timeouts");
-    ADD_STATS(cache_full, "cache_full");
-
-#undef ADD_STATS
-
-    return stats;
-
-error:
-    Py_DECREF(stats);
-    return NULL;
-}
-
-static PyObject *
-set_default_verify_paths(PySSLContext *self, PyObject *unused)
-{
-    if (!SSL_CTX_set_default_verify_paths(self->ctx)) {
-        _setSSLError(NULL, 0, __FILE__, __LINE__);
-        return NULL;
-    }
-    Py_RETURN_NONE;
-}
-
-#ifndef OPENSSL_NO_ECDH
-static PyObject *
-set_ecdh_curve(PySSLContext *self, PyObject *name)
-{
-    PyObject *name_bytes;
-    int nid;
-    EC_KEY *key;
-
-    if (!PyUnicode_FSConverter(name, &name_bytes))
-        return NULL;
-    assert(PyBytes_Check(name_bytes));
-    nid = OBJ_sn2nid(PyBytes_AS_STRING(name_bytes));
-    Py_DECREF(name_bytes);
-    if (nid == 0) {
-        PyErr_Format(PyExc_ValueError,
-                     "unknown elliptic curve name %R", name);
-        return NULL;
-    }
-    key = EC_KEY_new_by_curve_name(nid);
-    if (key == NULL) {
-        _setSSLError(NULL, 0, __FILE__, __LINE__);
-        return NULL;
-    }
-    SSL_CTX_set_tmp_ecdh(self->ctx, key);
-    EC_KEY_free(key);
-    Py_RETURN_NONE;
-}
-#endif
-
-#if HAVE_SNI && !defined(OPENSSL_NO_TLSEXT)
-static int
-_servername_callback(SSL *s, int *al, void *args)
-{
-    int ret;
-    PySSLContext *ssl_ctx = (PySSLContext *) args;
-    PySSLSocket *ssl;
-    PyObject *servername_o;
-    PyObject *servername_idna;
-    PyObject *result;
-    /* The high-level ssl.SSLSocket object */
-    PyObject *ssl_socket;
-    const char *servername = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);
-#ifdef WITH_THREAD
-    PyGILState_STATE gstate = PyGILState_Ensure();
-#endif
-
-    if (ssl_ctx->set_hostname == NULL) {
-        /* remove race condition in this the call back while if removing the
-         * callback is in progress */
-#ifdef WITH_THREAD
-        PyGILState_Release(gstate);
-#endif
-        return SSL_TLSEXT_ERR_OK;
-    }
-
-    ssl = SSL_get_app_data(s);
-    assert(PySSLSocket_Check(ssl));
-
-    /* The servername callback expects a argument that represents the current
-     * SSL connection and that has a .context attribute that can be changed to
-     * identify the requested hostname. Since the official API is the Python
-     * level API we want to pass the callback a Python level object rather than
-     * a _ssl.SSLSocket instance. If there's an "owner" (typically an
-     * SSLObject) that will be passed. Otherwise if there's a socket then that
-     * will be passed. If both do not exist only then the C-level object is
-     * passed. */
-    if (ssl->owner)
-        ssl_socket = PyWeakref_GetObject(ssl->owner);
-    else if (ssl->Socket)
-        ssl_socket = PyWeakref_GetObject(ssl->Socket);
-    else
-        ssl_socket = (PyObject *) ssl;
-
-    Py_INCREF(ssl_socket);
-    if (ssl_socket == Py_None)
-        goto error;
-
-    if (servername == NULL) {
-        result = PyObject_CallFunctionObjArgs(ssl_ctx->set_hostname, ssl_socket,
-                                              Py_None, ssl_ctx, NULL);
-    }
-    else {
-        servername_o = PyBytes_FromString(servername);
-        if (servername_o == NULL) {
-            PyErr_WriteUnraisable((PyObject *) ssl_ctx);
-            goto error;
-        }
-        servername_idna = PyUnicode_FromEncodedObject(servername_o, "idna", NULL);
-        if (servername_idna == NULL) {
-            PyErr_WriteUnraisable(servername_o);
-            Py_DECREF(servername_o);
-            goto error;
-        }
-        Py_DECREF(servername_o);
-        result = PyObject_CallFunctionObjArgs(ssl_ctx->set_hostname, ssl_socket,
-                                              servername_idna, ssl_ctx, NULL);
-        Py_DECREF(servername_idna);
-    }
-    Py_DECREF(ssl_socket);
-
-    if (result == NULL) {
-        PyErr_WriteUnraisable(ssl_ctx->set_hostname);
-        *al = SSL_AD_HANDSHAKE_FAILURE;
-        ret = SSL_TLSEXT_ERR_ALERT_FATAL;
-    }
-    else {
-        if (result != Py_None) {
-            *al = (int) PyLong_AsLong(result);
-            if (PyErr_Occurred()) {
-                PyErr_WriteUnraisable(result);
-                *al = SSL_AD_INTERNAL_ERROR;
-            }
-            ret = SSL_TLSEXT_ERR_ALERT_FATAL;
-        }
-        else {
-            ret = SSL_TLSEXT_ERR_OK;
-        }
-        Py_DECREF(result);
-    }
-
-#ifdef WITH_THREAD
-    PyGILState_Release(gstate);
-#endif
-    return ret;
-
-error:
-    Py_DECREF(ssl_socket);
-    *al = SSL_AD_INTERNAL_ERROR;
-    ret = SSL_TLSEXT_ERR_ALERT_FATAL;
-#ifdef WITH_THREAD
-    PyGILState_Release(gstate);
-#endif
-    return ret;
-}
-#endif
-
-PyDoc_STRVAR(PySSL_set_servername_callback_doc,
-"set_servername_callback(method)\n\
-\n\
-This sets a callback that will be called when a server name is provided by\n\
-the SSL/TLS client in the SNI extension.\n\
-\n\
-If the argument is None then the callback is disabled. The method is called\n\
-with the SSLSocket, the server name as a string, and the SSLContext object.\n\
-See RFC 6066 for details of the SNI extension.");
-
-static PyObject *
-set_servername_callback(PySSLContext *self, PyObject *args)
-{
-#if HAVE_SNI && !defined(OPENSSL_NO_TLSEXT)
-    PyObject *cb;
-
-    if (!PyArg_ParseTuple(args, "O", &cb))
-        return NULL;
-
-    Py_CLEAR(self->set_hostname);
-    if (cb == Py_None) {
-        SSL_CTX_set_tlsext_servername_callback(self->ctx, NULL);
-    }
-    else {
-        if (!PyCallable_Check(cb)) {
-            SSL_CTX_set_tlsext_servername_callback(self->ctx, NULL);
-            PyErr_SetString(PyExc_TypeError,
-                            "not a callable object");
-            return NULL;
-        }
-        Py_INCREF(cb);
-        self->set_hostname = cb;
-        SSL_CTX_set_tlsext_servername_callback(self->ctx, _servername_callback);
-        SSL_CTX_set_tlsext_servername_arg(self->ctx, self);
-    }
-    Py_RETURN_NONE;
-#else
-    PyErr_SetString(PyExc_NotImplementedError,
-                    "The TLS extension servername callback, "
-                    "SSL_CTX_set_tlsext_servername_callback, "
-                    "is not in the current OpenSSL library.");
-    return NULL;
-#endif
-}
-
-PyDoc_STRVAR(PySSL_get_stats_doc,
-"cert_store_stats() -> {'crl': int, 'x509_ca': int, 'x509': int}\n\
-\n\
-Returns quantities of loaded X.509 certificates. X.509 certificates with a\n\
-CA extension and certificate revocation lists inside the context's cert\n\
-store.\n\
-NOTE: Certificates in a capath directory aren't loaded unless they have\n\
-been used at least once.");
-
-static PyObject *
-cert_store_stats(PySSLContext *self)
-{
-    X509_STORE *store;
-    X509_OBJECT *obj;
-    int x509 = 0, crl = 0, pkey = 0, ca = 0, i;
-
-    store = SSL_CTX_get_cert_store(self->ctx);
-    for (i = 0; i < sk_X509_OBJECT_num(store->objs); i++) {
-        obj = sk_X509_OBJECT_value(store->objs, i);
-        switch (obj->type) {
-            case X509_LU_X509:
-                x509++;
-                if (X509_check_ca(obj->data.x509)) {
-                    ca++;
-                }
-                break;
-            case X509_LU_CRL:
-                crl++;
-                break;
-            case X509_LU_PKEY:
-                pkey++;
-                break;
-            default:
-                /* Ignore X509_LU_FAIL, X509_LU_RETRY, X509_LU_PKEY.
-                 * As far as I can tell they are internal states and never
-                 * stored in a cert store */
-                break;
-        }
-    }
-    return Py_BuildValue("{sisisi}", "x509", x509, "crl", crl,
-        "x509_ca", ca);
-}
-
-PyDoc_STRVAR(PySSL_get_ca_certs_doc,
-"get_ca_certs(binary_form=False) -> list of loaded certificate\n\
-\n\
-Returns a list of dicts with information of loaded CA certs. If the\n\
-optional argument is True, returns a DER-encoded copy of the CA certificate.\n\
-NOTE: Certificates in a capath directory aren't loaded unless they have\n\
-been used at least once.");
-
-static PyObject *
-get_ca_certs(PySSLContext *self, PyObject *args, PyObject *kwds)
-{
-    char *kwlist[] = {"binary_form", NULL};
-    X509_STORE *store;
-    PyObject *ci = NULL, *rlist = NULL;
-    int i;
-    int binary_mode = 0;
-
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, "|p:get_ca_certs",
-                                     kwlist, &binary_mode)) {
-        return NULL;
-    }
-
-    if ((rlist = PyList_New(0)) == NULL) {
-        return NULL;
-    }
-
-    store = SSL_CTX_get_cert_store(self->ctx);
-    for (i = 0; i < sk_X509_OBJECT_num(store->objs); i++) {
-        X509_OBJECT *obj;
-        X509 *cert;
-
-        obj = sk_X509_OBJECT_value(store->objs, i);
-        if (obj->type != X509_LU_X509) {
-            /* not a x509 cert */
-            continue;
-        }
-        /* CA for any purpose */
-        cert = obj->data.x509;
-        if (!X509_check_ca(cert)) {
-            continue;
-        }
-        if (binary_mode) {
-            ci = _certificate_to_der(cert);
-        } else {
-            ci = _decode_certificate(cert);
-        }
-        if (ci == NULL) {
-            goto error;
-        }
-        if (PyList_Append(rlist, ci) == -1) {
-            goto error;
-        }
-        Py_CLEAR(ci);
-    }
-    return rlist;
-
-  error:
-    Py_XDECREF(ci);
-    Py_XDECREF(rlist);
-    return NULL;
-}
-
-
-static PyGetSetDef context_getsetlist[] = {
-    {"check_hostname", (getter) get_check_hostname,
-                       (setter) set_check_hostname, NULL},
-    {"options", (getter) get_options,
-                (setter) set_options, NULL},
-    {"verify_flags", (getter) get_verify_flags,
-                     (setter) set_verify_flags, NULL},
-    {"verify_mode", (getter) get_verify_mode,
-                    (setter) set_verify_mode, NULL},
-    {NULL},            /* sentinel */
-};
-
-static struct PyMethodDef context_methods[] = {
-    {"_wrap_socket", (PyCFunction) context_wrap_socket,
-                       METH_VARARGS | METH_KEYWORDS, NULL},
-    {"_wrap_bio", (PyCFunction) context_wrap_bio,
-                  METH_VARARGS | METH_KEYWORDS, NULL},
-    {"set_ciphers", (PyCFunction) set_ciphers,
-                    METH_VARARGS, NULL},
-    {"_set_alpn_protocols", (PyCFunction) _set_alpn_protocols,
-                           METH_VARARGS, NULL},
-    {"_set_npn_protocols", (PyCFunction) _set_npn_protocols,
-                           METH_VARARGS, NULL},
-    {"load_cert_chain", (PyCFunction) load_cert_chain,
-                        METH_VARARGS | METH_KEYWORDS, NULL},
-    {"load_dh_params", (PyCFunction) load_dh_params,
-                       METH_O, NULL},
-    {"load_verify_locations", (PyCFunction) load_verify_locations,
-                              METH_VARARGS | METH_KEYWORDS, NULL},
-    {"session_stats", (PyCFunction) session_stats,
-                      METH_NOARGS, NULL},
-    {"set_default_verify_paths", (PyCFunction) set_default_verify_paths,
-                                 METH_NOARGS, NULL},
-#ifndef OPENSSL_NO_ECDH
-    {"set_ecdh_curve", (PyCFunction) set_ecdh_curve,
-                       METH_O, NULL},
-#endif
-    {"set_servername_callback", (PyCFunction) set_servername_callback,
-                    METH_VARARGS, PySSL_set_servername_callback_doc},
-    {"cert_store_stats", (PyCFunction) cert_store_stats,
-                    METH_NOARGS, PySSL_get_stats_doc},
-    {"get_ca_certs", (PyCFunction) get_ca_certs,
-                    METH_VARARGS | METH_KEYWORDS, PySSL_get_ca_certs_doc},
-    {NULL, NULL}        /* sentinel */
-};
-
-static PyTypeObject PySSLContext_Type = {
-    PyVarObject_HEAD_INIT(NULL, 0)
-    "_ssl._SSLContext",                        /*tp_name*/
-    sizeof(PySSLContext),                      /*tp_basicsize*/
-    0,                                         /*tp_itemsize*/
-    (destructor)context_dealloc,               /*tp_dealloc*/
-    0,                                         /*tp_print*/
-    0,                                         /*tp_getattr*/
-    0,                                         /*tp_setattr*/
-    0,                                         /*tp_reserved*/
-    0,                                         /*tp_repr*/
-    0,                                         /*tp_as_number*/
-    0,                                         /*tp_as_sequence*/
-    0,                                         /*tp_as_mapping*/
-    0,                                         /*tp_hash*/
-    0,                                         /*tp_call*/
-    0,                                         /*tp_str*/
-    0,                                         /*tp_getattro*/
-    0,                                         /*tp_setattro*/
-    0,                                         /*tp_as_buffer*/
-    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, /*tp_flags*/
-    0,                                         /*tp_doc*/
-    (traverseproc) context_traverse,           /*tp_traverse*/
-    (inquiry) context_clear,                   /*tp_clear*/
-    0,                                         /*tp_richcompare*/
-    0,                                         /*tp_weaklistoffset*/
-    0,                                         /*tp_iter*/
-    0,                                         /*tp_iternext*/
-    context_methods,                           /*tp_methods*/
-    0,                                         /*tp_members*/
-    context_getsetlist,                        /*tp_getset*/
-    0,                                         /*tp_base*/
-    0,                                         /*tp_dict*/
-    0,                                         /*tp_descr_get*/
-    0,                                         /*tp_descr_set*/
-    0,                                         /*tp_dictoffset*/
-    0,                                         /*tp_init*/
-    0,                                         /*tp_alloc*/
-    context_new,                               /*tp_new*/
-};
-
-
-/*
- * MemoryBIO objects
- */
-
-static PyObject *
-memory_bio_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
-{
-    char *kwlist[] = {NULL};
-    BIO *bio;
-    PySSLMemoryBIO *self;
-
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, ":MemoryBIO", kwlist))
-        return NULL;
-
-    bio = BIO_new(BIO_s_mem());
-    if (bio == NULL) {
-        PyErr_SetString(PySSLErrorObject,
-                        "failed to allocate BIO");
-        return NULL;
-    }
-    /* Since our BIO is non-blocking an empty read() does not indicate EOF,
-     * just that no data is currently available. The SSL routines should retry
-     * the read, which we can achieve by calling BIO_set_retry_read(). */
-    BIO_set_retry_read(bio);
-    BIO_set_mem_eof_return(bio, -1);
-
-    assert(type != NULL && type->tp_alloc != NULL);
-    self = (PySSLMemoryBIO *) type->tp_alloc(type, 0);
-    if (self == NULL) {
-        BIO_free(bio);
-        return NULL;
-    }
-    self->bio = bio;
-    self->eof_written = 0;
-
-    return (PyObject *) self;
-}
-
-static void
-memory_bio_dealloc(PySSLMemoryBIO *self)
-{
-    BIO_free(self->bio);
-    Py_TYPE(self)->tp_free(self);
-}
-
-static PyObject *
-memory_bio_get_pending(PySSLMemoryBIO *self, void *c)
-{
-    return PyLong_FromLong(BIO_ctrl_pending(self->bio));
-}
-
-PyDoc_STRVAR(PySSL_memory_bio_pending_doc,
-"The number of bytes pending in the memory BIO.");
-
-static PyObject *
-memory_bio_get_eof(PySSLMemoryBIO *self, void *c)
-{
-    return PyBool_FromLong((BIO_ctrl_pending(self->bio) == 0)
-                           && self->eof_written);
-}
-
-PyDoc_STRVAR(PySSL_memory_bio_eof_doc,
-"Whether the memory BIO is at EOF.");
-
-static PyObject *
-memory_bio_read(PySSLMemoryBIO *self, PyObject *args)
-{
-    int len = -1, avail, nbytes;
-    PyObject *result;
-
-    if (!PyArg_ParseTuple(args, "|i:read", &len))
-        return NULL;
-
-    avail = BIO_ctrl_pending(self->bio);
-    if ((len < 0) || (len > avail))
-        len = avail;
-
-    result = PyBytes_FromStringAndSize(NULL, len);
-    if ((result == NULL) || (len == 0))
-        return result;
-
-    nbytes = BIO_read(self->bio, PyBytes_AS_STRING(result), len);
-    /* There should never be any short reads but check anyway. */
-    if ((nbytes < len) && (_PyBytes_Resize(&result, len) < 0)) {
-        Py_DECREF(result);
-        return NULL;
-    }
-
-    return result;
-}
-
-PyDoc_STRVAR(PySSL_memory_bio_read_doc,
-"read([len]) -> bytes\n\
-\n\
-Read up to len bytes from the memory BIO.\n\
-\n\
-If len is not specified, read the entire buffer.\n\
-If the return value is an empty bytes instance, this means either\n\
-EOF or that no data is available. Use the \"eof\" property to\n\
-distinguish between the two.");
-
-static PyObject *
-memory_bio_write(PySSLMemoryBIO *self, PyObject *args)
-{
-    Py_buffer buf;
-    int nbytes;
-
-    if (!PyArg_ParseTuple(args, "y*:write", &buf))
-        return NULL;
-
-    if (buf.len > INT_MAX) {
-        PyErr_Format(PyExc_OverflowError,
-                     "string longer than %d bytes", INT_MAX);
-        goto error;
-    }
-
-    if (self->eof_written) {
-        PyErr_SetString(PySSLErrorObject,
-                        "cannot write() after write_eof()");
-        goto error;
-    }
-
-    nbytes = BIO_write(self->bio, buf.buf, buf.len);
-    if (nbytes < 0) {
-        _setSSLError(NULL, 0, __FILE__, __LINE__);
-        goto error;
-    }
-
-    PyBuffer_Release(&buf);
-    return PyLong_FromLong(nbytes);
-
-error:
-    PyBuffer_Release(&buf);
-    return NULL;
-}
-
-PyDoc_STRVAR(PySSL_memory_bio_write_doc,
-"write(b) -> len\n\
-\n\
-Writes the bytes b into the memory BIO. Returns the number\n\
-of bytes written.");
-
-static PyObject *
-memory_bio_write_eof(PySSLMemoryBIO *self, PyObject *args)
-{
-    self->eof_written = 1;
-    /* After an EOF is written, a zero return from read() should be a real EOF
-     * i.e. it should not be retried. Clear the SHOULD_RETRY flag. */
-    BIO_clear_retry_flags(self->bio);
-    BIO_set_mem_eof_return(self->bio, 0);
-
-    Py_RETURN_NONE;
-}
-
-PyDoc_STRVAR(PySSL_memory_bio_write_eof_doc,
-"write_eof()\n\
-\n\
-Write an EOF marker to the memory BIO.\n\
-When all data has been read, the \"eof\" property will be True.");
-
-static PyGetSetDef memory_bio_getsetlist[] = {
-    {"pending", (getter) memory_bio_get_pending, NULL,
-                PySSL_memory_bio_pending_doc},
-    {"eof", (getter) memory_bio_get_eof, NULL,
-            PySSL_memory_bio_eof_doc},
-    {NULL},            /* sentinel */
-};
-
-static struct PyMethodDef memory_bio_methods[] = {
-    {"read", (PyCFunction) memory_bio_read,
-             METH_VARARGS, PySSL_memory_bio_read_doc},
-    {"write", (PyCFunction) memory_bio_write,
-              METH_VARARGS, PySSL_memory_bio_write_doc},
-    {"write_eof", (PyCFunction) memory_bio_write_eof,
-                  METH_NOARGS, PySSL_memory_bio_write_eof_doc},
-    {NULL, NULL}        /* sentinel */
-};
-
-static PyTypeObject PySSLMemoryBIO_Type = {
-    PyVarObject_HEAD_INIT(NULL, 0)
-    "_ssl.MemoryBIO",                         /*tp_name*/
-    sizeof(PySSLMemoryBIO),                    /*tp_basicsize*/
-    0,                                         /*tp_itemsize*/
-    (destructor)memory_bio_dealloc,            /*tp_dealloc*/
-    0,                                         /*tp_print*/
-    0,                                         /*tp_getattr*/
-    0,                                         /*tp_setattr*/
-    0,                                         /*tp_reserved*/
-    0,                                         /*tp_repr*/
-    0,                                         /*tp_as_number*/
-    0,                                         /*tp_as_sequence*/
-    0,                                         /*tp_as_mapping*/
-    0,                                         /*tp_hash*/
-    0,                                         /*tp_call*/
-    0,                                         /*tp_str*/
-    0,                                         /*tp_getattro*/
-    0,                                         /*tp_setattro*/
-    0,                                         /*tp_as_buffer*/
-    Py_TPFLAGS_DEFAULT,                        /*tp_flags*/
-    0,                                         /*tp_doc*/
-    0,                                         /*tp_traverse*/
-    0,                                         /*tp_clear*/
-    0,                                         /*tp_richcompare*/
-    0,                                         /*tp_weaklistoffset*/
-    0,                                         /*tp_iter*/
-    0,                                         /*tp_iternext*/
-    memory_bio_methods,                        /*tp_methods*/
-    0,                                         /*tp_members*/
-    memory_bio_getsetlist,                     /*tp_getset*/
-    0,                                         /*tp_base*/
-    0,                                         /*tp_dict*/
-    0,                                         /*tp_descr_get*/
-    0,                                         /*tp_descr_set*/
-    0,                                         /*tp_dictoffset*/
-    0,                                         /*tp_init*/
-    0,                                         /*tp_alloc*/
-    memory_bio_new,                            /*tp_new*/
-};
-
-
-/* helper routines for seeding the SSL PRNG */
-static PyObject *
-PySSL_RAND_add(PyObject *self, PyObject *args)
-{
-    Py_buffer view;
-    const char *buf;
-    Py_ssize_t len, written;
-    double entropy;
-
-    if (!PyArg_ParseTuple(args, "s*d:RAND_add", &view, &entropy))
-        return NULL;
-    buf = (const char *)view.buf;
-    len = view.len;
-    do {
-        written = Py_MIN(len, INT_MAX);
-        RAND_add(buf, (int)written, entropy);
-        buf += written;
-        len -= written;
-    } while (len);
-    PyBuffer_Release(&view);
-    Py_INCREF(Py_None);
-    return Py_None;
-}
-
-PyDoc_STRVAR(PySSL_RAND_add_doc,
-"RAND_add(string, entropy)\n\
-\n\
-Mix string into the OpenSSL PRNG state.  entropy (a float) is a lower\n\
-bound on the entropy contained in string.  See RFC 1750.");
-
-static PyObject *
-PySSL_RAND(int len, int pseudo)
-{
-    int ok;
-    PyObject *bytes;
-    unsigned long err;
-    const char *errstr;
-    PyObject *v;
-
-    if (len < 0) {
-        PyErr_SetString(PyExc_ValueError, "num must be positive");
-        return NULL;
-    }
-
-    bytes = PyBytes_FromStringAndSize(NULL, len);
-    if (bytes == NULL)
-        return NULL;
-    if (pseudo) {
-        ok = RAND_pseudo_bytes((unsigned char*)PyBytes_AS_STRING(bytes), len);
-        if (ok == 0 || ok == 1)
-            return Py_BuildValue("NO", bytes, ok == 1 ? Py_True : Py_False);
-    }
-    else {
-        ok = RAND_bytes((unsigned char*)PyBytes_AS_STRING(bytes), len);
-        if (ok == 1)
-            return bytes;
-    }
-    Py_DECREF(bytes);
-
-    err = ERR_get_error();
-    errstr = ERR_reason_error_string(err);
-    v = Py_BuildValue("(ks)", err, errstr);
-    if (v != NULL) {
-        PyErr_SetObject(PySSLErrorObject, v);
-        Py_DECREF(v);
-    }
-    return NULL;
-}
-
-static PyObject *
-PySSL_RAND_bytes(PyObject *self, PyObject *args)
-{
-    int len;
-    if (!PyArg_ParseTuple(args, "i:RAND_bytes", &len))
-        return NULL;
-    return PySSL_RAND(len, 0);
-}
-
-PyDoc_STRVAR(PySSL_RAND_bytes_doc,
-"RAND_bytes(n) -> bytes\n\
-\n\
-Generate n cryptographically strong pseudo-random bytes.");
-
-static PyObject *
-PySSL_RAND_pseudo_bytes(PyObject *self, PyObject *args)
-{
-    int len;
-    if (!PyArg_ParseTuple(args, "i:RAND_pseudo_bytes", &len))
-        return NULL;
-    return PySSL_RAND(len, 1);
-}
-
-PyDoc_STRVAR(PySSL_RAND_pseudo_bytes_doc,
-"RAND_pseudo_bytes(n) -> (bytes, is_cryptographic)\n\
-\n\
-Generate n pseudo-random bytes. is_cryptographic is True if the bytes\
-generated are cryptographically strong.");
-
-static PyObject *
-PySSL_RAND_status(PyObject *self)
-{
-    return PyLong_FromLong(RAND_status());
-}
-
-PyDoc_STRVAR(PySSL_RAND_status_doc,
-"RAND_status() -> 0 or 1\n\
-\n\
-Returns 1 if the OpenSSL PRNG has been seeded with enough data and 0 if not.\n\
-It is necessary to seed the PRNG with RAND_add() on some platforms before\n\
-using the ssl() function.");
-
-#ifdef HAVE_RAND_EGD
-static PyObject *
-PySSL_RAND_egd(PyObject *self, PyObject *args)
-{
-    PyObject *path;
-    int bytes;
-
-    if (!PyArg_ParseTuple(args, "O&:RAND_egd",
-                          PyUnicode_FSConverter, &path))
-        return NULL;
-
-    bytes = RAND_egd(PyBytes_AsString(path));
-    Py_DECREF(path);
-    if (bytes == -1) {
-        PyErr_SetString(PySSLErrorObject,
-                        "EGD connection failed or EGD did not return "
-                        "enough data to seed the PRNG");
-        return NULL;
-    }
-    return PyLong_FromLong(bytes);
-}
-
-PyDoc_STRVAR(PySSL_RAND_egd_doc,
-"RAND_egd(path) -> bytes\n\
-\n\
-Queries the entropy gather daemon (EGD) on the socket named by 'path'.\n\
-Returns number of bytes read.  Raises SSLError if connection to EGD\n\
-fails or if it does not provide enough data to seed PRNG.");
-#endif /* HAVE_RAND_EGD */
-
-
-PyDoc_STRVAR(PySSL_get_default_verify_paths_doc,
-"get_default_verify_paths() -> tuple\n\
-\n\
-Return search paths and environment vars that are used by SSLContext's\n\
-set_default_verify_paths() to load default CAs. The values are\n\
-'cert_file_env', 'cert_file', 'cert_dir_env', 'cert_dir'.");
-
-static PyObject *
-PySSL_get_default_verify_paths(PyObject *self)
-{
-    PyObject *ofile_env = NULL;
-    PyObject *ofile = NULL;
-    PyObject *odir_env = NULL;
-    PyObject *odir = NULL;
-
-#define convert(info, target) { \
-        const char *tmp = (info); \
-        target = NULL; \
-        if (!tmp) { Py_INCREF(Py_None); target = Py_None; } \
-        else if ((target = PyUnicode_DecodeFSDefault(tmp)) == NULL) { \
-            target = PyBytes_FromString(tmp); } \
-        if (!target) goto error; \
-    } while(0)
-
-    convert(X509_get_default_cert_file_env(), ofile_env);
-    convert(X509_get_default_cert_file(), ofile);
-    convert(X509_get_default_cert_dir_env(), odir_env);
-    convert(X509_get_default_cert_dir(), odir);
-#undef convert
-
-    return Py_BuildValue("NNNN", ofile_env, ofile, odir_env, odir);
-
-  error:
-    Py_XDECREF(ofile_env);
-    Py_XDECREF(ofile);
-    Py_XDECREF(odir_env);
-    Py_XDECREF(odir);
-    return NULL;
-}
-
-static PyObject*
-asn1obj2py(ASN1_OBJECT *obj)
-{
-    int nid;
-    const char *ln, *sn;
-    char buf[100];
-    Py_ssize_t buflen;
-
-    nid = OBJ_obj2nid(obj);
-    if (nid == NID_undef) {
-        PyErr_Format(PyExc_ValueError, "Unknown object");
-        return NULL;
-    }
-    sn = OBJ_nid2sn(nid);
-    ln = OBJ_nid2ln(nid);
-    buflen = OBJ_obj2txt(buf, sizeof(buf), obj, 1);
-    if (buflen < 0) {
-        _setSSLError(NULL, 0, __FILE__, __LINE__);
-        return NULL;
-    }
-    if (buflen) {
-        return Py_BuildValue("isss#", nid, sn, ln, buf, buflen);
-    } else {
-        return Py_BuildValue("issO", nid, sn, ln, Py_None);
-    }
-}
-
-PyDoc_STRVAR(PySSL_txt2obj_doc,
-"txt2obj(txt, name=False) -> (nid, shortname, longname, oid)\n\
-\n\
-Lookup NID, short name, long name and OID of an ASN1_OBJECT. By default\n\
-objects are looked up by OID. With name=True short and long name are also\n\
-matched.");
-
-static PyObject*
-PySSL_txt2obj(PyObject *self, PyObject *args, PyObject *kwds)
-{
-    char *kwlist[] = {"txt", "name", NULL};
-    PyObject *result = NULL;
-    char *txt;
-    int name = 0;
-    ASN1_OBJECT *obj;
-
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|p:txt2obj",
-                                     kwlist, &txt, &name)) {
-        return NULL;
-    }
-    obj = OBJ_txt2obj(txt, name ? 0 : 1);
-    if (obj == NULL) {
-        PyErr_Format(PyExc_ValueError, "unknown object '%.100s'", txt);
-        return NULL;
-    }
-    result = asn1obj2py(obj);
-    ASN1_OBJECT_free(obj);
-    return result;
-}
-
-PyDoc_STRVAR(PySSL_nid2obj_doc,
-"nid2obj(nid) -> (nid, shortname, longname, oid)\n\
-\n\
-Lookup NID, short name, long name and OID of an ASN1_OBJECT by NID.");
-
-static PyObject*
-PySSL_nid2obj(PyObject *self, PyObject *args)
-{
-    PyObject *result = NULL;
-    int nid;
-    ASN1_OBJECT *obj;
-
-    if (!PyArg_ParseTuple(args, "i:nid2obj", &nid)) {
-        return NULL;
-    }
-    if (nid < NID_undef) {
-        PyErr_SetString(PyExc_ValueError, "NID must be positive.");
-        return NULL;
-    }
-    obj = OBJ_nid2obj(nid);
-    if (obj == NULL) {
-        PyErr_Format(PyExc_ValueError, "unknown NID %i", nid);
-        return NULL;
-    }
-    result = asn1obj2py(obj);
-    ASN1_OBJECT_free(obj);
-    return result;
-}
-
-#ifdef _MSC_VER
-
-static PyObject*
-certEncodingType(DWORD encodingType)
-{
-    static PyObject *x509_asn = NULL;
-    static PyObject *pkcs_7_asn = NULL;
-
-    if (x509_asn == NULL) {
-        x509_asn = PyUnicode_InternFromString("x509_asn");
-        if (x509_asn == NULL)
-            return NULL;
-    }
-    if (pkcs_7_asn == NULL) {
-        pkcs_7_asn = PyUnicode_InternFromString("pkcs_7_asn");
-        if (pkcs_7_asn == NULL)
-            return NULL;
-    }
-    switch(encodingType) {
-    case X509_ASN_ENCODING:
-        Py_INCREF(x509_asn);
-        return x509_asn;
-    case PKCS_7_ASN_ENCODING:
-        Py_INCREF(pkcs_7_asn);
-        return pkcs_7_asn;
-    default:
-        return PyLong_FromLong(encodingType);
-    }
-}
-
-static PyObject*
-parseKeyUsage(PCCERT_CONTEXT pCertCtx, DWORD flags)
-{
-    CERT_ENHKEY_USAGE *usage;
-    DWORD size, error, i;
-    PyObject *retval;
-
-    if (!CertGetEnhancedKeyUsage(pCertCtx, flags, NULL, &size)) {
-        error = GetLastError();
-        if (error == CRYPT_E_NOT_FOUND) {
-            Py_RETURN_TRUE;
-        }
-        return PyErr_SetFromWindowsErr(error);
-    }
-
-    usage = (CERT_ENHKEY_USAGE*)PyMem_Malloc(size);
-    if (usage == NULL) {
-        return PyErr_NoMemory();
-    }
-
-    /* Now get the actual enhanced usage property */
-    if (!CertGetEnhancedKeyUsage(pCertCtx, flags, usage, &size)) {
-        PyMem_Free(usage);
-        error = GetLastError();
-        if (error == CRYPT_E_NOT_FOUND) {
-            Py_RETURN_TRUE;
-        }
-        return PyErr_SetFromWindowsErr(error);
-    }
-    retval = PySet_New(NULL);
-    if (retval == NULL) {
-        goto error;
-    }
-    for (i = 0; i < usage->cUsageIdentifier; ++i) {
-        if (usage->rgpszUsageIdentifier[i]) {
-            PyObject *oid;
-            int err;
-            oid = PyUnicode_FromString(usage->rgpszUsageIdentifier[i]);
-            if (oid == NULL) {
-                Py_CLEAR(retval);
-                goto error;
-            }
-            err = PySet_Add(retval, oid);
-            Py_DECREF(oid);
-            if (err == -1) {
-                Py_CLEAR(retval);
-                goto error;
-            }
-        }
-    }
-  error:
-    PyMem_Free(usage);
-    return retval;
-}
-
-PyDoc_STRVAR(PySSL_enum_certificates_doc,
-"enum_certificates(store_name) -> []\n\
-\n\
-Retrieve certificates from Windows' cert store. store_name may be one of\n\
-'CA', 'ROOT' or 'MY'. The system may provide more cert storages, too.\n\
-The function returns a list of (bytes, encoding_type, trust) tuples. The\n\
-encoding_type flag can be interpreted with X509_ASN_ENCODING or\n\
-PKCS_7_ASN_ENCODING. The trust setting is either a set of OIDs or the\n\
-boolean True.");
-
-static PyObject *
-PySSL_enum_certificates(PyObject *self, PyObject *args, PyObject *kwds)
-{
-    char *kwlist[] = {"store_name", NULL};
-    char *store_name;
-    HCERTSTORE hStore = NULL;
-    PCCERT_CONTEXT pCertCtx = NULL;
-    PyObject *keyusage = NULL, *cert = NULL, *enc = NULL, *tup = NULL;
-    PyObject *result = NULL;
-
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, "s:enum_certificates",
-                                     kwlist, &store_name)) {
-        return NULL;
-    }
-    result = PyList_New(0);
-    if (result == NULL) {
-        return NULL;
-    }
-    hStore = CertOpenSystemStore((HCRYPTPROV)NULL, store_name);
-    if (hStore == NULL) {
-        Py_DECREF(result);
-        return PyErr_SetFromWindowsErr(GetLastError());
-    }
-
-    while (pCertCtx = CertEnumCertificatesInStore(hStore, pCertCtx)) {
-        cert = PyBytes_FromStringAndSize((const char*)pCertCtx->pbCertEncoded,
-                                            pCertCtx->cbCertEncoded);
-        if (!cert) {
-            Py_CLEAR(result);
-            break;
-        }
-        if ((enc = certEncodingType(pCertCtx->dwCertEncodingType)) == NULL) {
-            Py_CLEAR(result);
-            break;
-        }
-        keyusage = parseKeyUsage(pCertCtx, CERT_FIND_PROP_ONLY_ENHKEY_USAGE_FLAG);
-        if (keyusage == Py_True) {
-            Py_DECREF(keyusage);
-            keyusage = parseKeyUsage(pCertCtx, CERT_FIND_EXT_ONLY_ENHKEY_USAGE_FLAG);
-        }
-        if (keyusage == NULL) {
-            Py_CLEAR(result);
-            break;
-        }
-        if ((tup = PyTuple_New(3)) == NULL) {
-            Py_CLEAR(result);
-            break;
-        }
-        PyTuple_SET_ITEM(tup, 0, cert);
-        cert = NULL;
-        PyTuple_SET_ITEM(tup, 1, enc);
-        enc = NULL;
-        PyTuple_SET_ITEM(tup, 2, keyusage);
-        keyusage = NULL;
-        if (PyList_Append(result, tup) < 0) {
-            Py_CLEAR(result);
-            break;
-        }
-        Py_CLEAR(tup);
-    }
-    if (pCertCtx) {
-        /* loop ended with an error, need to clean up context manually */
-        CertFreeCertificateContext(pCertCtx);
-    }
-
-    /* In error cases cert, enc and tup may not be NULL */
-    Py_XDECREF(cert);
-    Py_XDECREF(enc);
-    Py_XDECREF(keyusage);
-    Py_XDECREF(tup);
-
-    if (!CertCloseStore(hStore, 0)) {
-        /* This error case might shadow another exception.*/
-        Py_XDECREF(result);
-        return PyErr_SetFromWindowsErr(GetLastError());
-    }
-    return result;
-}
-
-PyDoc_STRVAR(PySSL_enum_crls_doc,
-"enum_crls(store_name) -> []\n\
-\n\
-Retrieve CRLs from Windows' cert store. store_name may be one of\n\
-'CA', 'ROOT' or 'MY'. The system may provide more cert storages, too.\n\
-The function returns a list of (bytes, encoding_type) tuples. The\n\
-encoding_type flag can be interpreted with X509_ASN_ENCODING or\n\
-PKCS_7_ASN_ENCODING.");
-
-static PyObject *
-PySSL_enum_crls(PyObject *self, PyObject *args, PyObject *kwds)
-{
-    char *kwlist[] = {"store_name", NULL};
-    char *store_name;
-    HCERTSTORE hStore = NULL;
-    PCCRL_CONTEXT pCrlCtx = NULL;
-    PyObject *crl = NULL, *enc = NULL, *tup = NULL;
-    PyObject *result = NULL;
-
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, "s:enum_crls",
-                                     kwlist, &store_name)) {
-        return NULL;
-    }
-    result = PyList_New(0);
-    if (result == NULL) {
-        return NULL;
-    }
-    hStore = CertOpenSystemStore((HCRYPTPROV)NULL, store_name);
-    if (hStore == NULL) {
-        Py_DECREF(result);
-        return PyErr_SetFromWindowsErr(GetLastError());
-    }
-
-    while (pCrlCtx = CertEnumCRLsInStore(hStore, pCrlCtx)) {
-        crl = PyBytes_FromStringAndSize((const char*)pCrlCtx->pbCrlEncoded,
-                                            pCrlCtx->cbCrlEncoded);
-        if (!crl) {
-            Py_CLEAR(result);
-            break;
-        }
-        if ((enc = certEncodingType(pCrlCtx->dwCertEncodingType)) == NULL) {
-            Py_CLEAR(result);
-            break;
-        }
-        if ((tup = PyTuple_New(2)) == NULL) {
-            Py_CLEAR(result);
-            break;
-        }
-        PyTuple_SET_ITEM(tup, 0, crl);
-        crl = NULL;
-        PyTuple_SET_ITEM(tup, 1, enc);
-        enc = NULL;
-
-        if (PyList_Append(result, tup) < 0) {
-            Py_CLEAR(result);
-            break;
-        }
-        Py_CLEAR(tup);
-    }
-    if (pCrlCtx) {
-        /* loop ended with an error, need to clean up context manually */
-        CertFreeCRLContext(pCrlCtx);
-    }
-
-    /* In error cases cert, enc and tup may not be NULL */
-    Py_XDECREF(crl);
-    Py_XDECREF(enc);
-    Py_XDECREF(tup);
-
-    if (!CertCloseStore(hStore, 0)) {
-        /* This error case might shadow another exception.*/
-        Py_XDECREF(result);
-        return PyErr_SetFromWindowsErr(GetLastError());
-    }
-    return result;
-}
-
-#endif /* _MSC_VER */
-
-/* List of functions exported by this module. */
-
-static PyMethodDef PySSL_methods[] = {
-    {"_test_decode_cert",       PySSL_test_decode_certificate,
-     METH_VARARGS},
-    {"RAND_add",            PySSL_RAND_add, METH_VARARGS,
-     PySSL_RAND_add_doc},
-    {"RAND_bytes",          PySSL_RAND_bytes, METH_VARARGS,
-     PySSL_RAND_bytes_doc},
-    {"RAND_pseudo_bytes",   PySSL_RAND_pseudo_bytes, METH_VARARGS,
-     PySSL_RAND_pseudo_bytes_doc},
-#ifdef HAVE_RAND_EGD
-    {"RAND_egd",            PySSL_RAND_egd, METH_VARARGS,
-     PySSL_RAND_egd_doc},
-#endif
-    {"RAND_status",         (PyCFunction)PySSL_RAND_status, METH_NOARGS,
-     PySSL_RAND_status_doc},
-    {"get_default_verify_paths", (PyCFunction)PySSL_get_default_verify_paths,
-     METH_NOARGS, PySSL_get_default_verify_paths_doc},
-#ifdef _MSC_VER
-    {"enum_certificates", (PyCFunction)PySSL_enum_certificates,
-     METH_VARARGS | METH_KEYWORDS, PySSL_enum_certificates_doc},
-    {"enum_crls", (PyCFunction)PySSL_enum_crls,
-     METH_VARARGS | METH_KEYWORDS, PySSL_enum_crls_doc},
-#endif
-    {"txt2obj", (PyCFunction)PySSL_txt2obj,
-     METH_VARARGS | METH_KEYWORDS, PySSL_txt2obj_doc},
-    {"nid2obj", (PyCFunction)PySSL_nid2obj,
-     METH_VARARGS, PySSL_nid2obj_doc},
-    {NULL,                  NULL}            /* Sentinel */
-};
-
-
-#ifdef WITH_THREAD
-
-/* an implementation of OpenSSL threading operations in terms
-   of the Python C thread library */
-
-static PyThread_type_lock *_ssl_locks = NULL;
-
-#if OPENSSL_VERSION_NUMBER >= 0x10000000
-/* use new CRYPTO_THREADID API. */
-static void
-_ssl_threadid_callback(CRYPTO_THREADID *id)
-{
-    CRYPTO_THREADID_set_numeric(id,
-                                (unsigned long)PyThread_get_thread_ident());
-}
-#else
-/* deprecated CRYPTO_set_id_callback() API. */
-static unsigned long
-_ssl_thread_id_function (void) {
-    return PyThread_get_thread_ident();
-}
-#endif
-
-static void _ssl_thread_locking_function
-    (int mode, int n, const char *file, int line) {
-    /* this function is needed to perform locking on shared data
-       structures. (Note that OpenSSL uses a number of global data
-       structures that will be implicitly shared whenever multiple
-       threads use OpenSSL.) Multi-threaded applications will
-       crash at random if it is not set.
-
-       locking_function() must be able to handle up to
-       CRYPTO_num_locks() different mutex locks. It sets the n-th
-       lock if mode & CRYPTO_LOCK, and releases it otherwise.
-
-       file and line are the file number of the function setting the
-       lock. They can be useful for debugging.
-    */
-
-    if ((_ssl_locks == NULL) ||
-        (n < 0) || ((unsigned)n >= _ssl_locks_count))
-        return;
-
-    if (mode & CRYPTO_LOCK) {
-        PyThread_acquire_lock(_ssl_locks[n], 1);
-    } else {
-        PyThread_release_lock(_ssl_locks[n]);
-    }
-}
-
-static int _setup_ssl_threads(void) {
-
-    unsigned int i;
-
-    if (_ssl_locks == NULL) {
-        _ssl_locks_count = CRYPTO_num_locks();
-        _ssl_locks = PyMem_New(PyThread_type_lock, _ssl_locks_count);
-        if (_ssl_locks == NULL) {
-            PyErr_NoMemory();
-            return 0;
-        }
-        memset(_ssl_locks, 0,
-               sizeof(PyThread_type_lock) * _ssl_locks_count);
-        for (i = 0;  i < _ssl_locks_count;  i++) {
-            _ssl_locks[i] = PyThread_allocate_lock();
-            if (_ssl_locks[i] == NULL) {
-                unsigned int j;
-                for (j = 0;  j < i;  j++) {
-                    PyThread_free_lock(_ssl_locks[j]);
-                }
-                PyMem_Free(_ssl_locks);
-                return 0;
-            }
-        }
-        CRYPTO_set_locking_callback(_ssl_thread_locking_function);
-#if OPENSSL_VERSION_NUMBER >= 0x10000000
-        CRYPTO_THREADID_set_callback(_ssl_threadid_callback);
-#else
-        CRYPTO_set_id_callback(_ssl_thread_id_function);
-#endif
-    }
-    return 1;
-}
-
-#endif  /* def HAVE_THREAD */
-
-PyDoc_STRVAR(module_doc,
-"Implementation module for SSL socket operations.  See the socket module\n\
-for documentation.");
-
-
-static struct PyModuleDef _sslmodule = {
-    PyModuleDef_HEAD_INIT,
-    "_ssl",
-    module_doc,
-    -1,
-    PySSL_methods,
-    NULL,
-    NULL,
-    NULL,
-    NULL
-};
-
-
-static void
-parse_openssl_version(unsigned long libver,
-                      unsigned int *major, unsigned int *minor,
-                      unsigned int *fix, unsigned int *patch,
-                      unsigned int *status)
-{
-    *status = libver & 0xF;
-    libver >>= 4;
-    *patch = libver & 0xFF;
-    libver >>= 8;
-    *fix = libver & 0xFF;
-    libver >>= 8;
-    *minor = libver & 0xFF;
-    libver >>= 8;
-    *major = libver & 0xFF;
-}
-
-PyMODINIT_FUNC
-PyInit__ssl(void)
-{
-    PyObject *m, *d, *r;
-    unsigned long libver;
-    unsigned int major, minor, fix, patch, status;
-    PySocketModule_APIObject *socket_api;
-    struct py_ssl_error_code *errcode;
-    struct py_ssl_library_code *libcode;
-
-    if (PyType_Ready(&PySSLContext_Type) < 0)
-        return NULL;
-    if (PyType_Ready(&PySSLSocket_Type) < 0)
-        return NULL;
-    if (PyType_Ready(&PySSLMemoryBIO_Type) < 0)
-        return NULL;
-
-    m = PyModule_Create(&_sslmodule);
-    if (m == NULL)
-        return NULL;
-    d = PyModule_GetDict(m);
-
-    /* Load _socket module and its C API */
-    socket_api = PySocketModule_ImportModuleAndAPI();
-    if (!socket_api)
-        return NULL;
-    PySocketModule = *socket_api;
-
-    /* Init OpenSSL */
-    SSL_load_error_strings();
-    SSL_library_init();
-#ifdef WITH_THREAD
-    /* note that this will start threading if not already started */
-    if (!_setup_ssl_threads()) {
-        return NULL;
-    }
-#endif
-    OpenSSL_add_all_algorithms();
-
-    /* Add symbols to module dict */
-    sslerror_type_slots[0].pfunc = PyExc_OSError;
-    PySSLErrorObject = PyType_FromSpec(&sslerror_type_spec);
-    if (PySSLErrorObject == NULL)
-        return NULL;
-
-    PySSLZeroReturnErrorObject = PyErr_NewExceptionWithDoc(
-        "ssl.SSLZeroReturnError", SSLZeroReturnError_doc,
-        PySSLErrorObject, NULL);
-    PySSLWantReadErrorObject = PyErr_NewExceptionWithDoc(
-        "ssl.SSLWantReadError", SSLWantReadError_doc,
-        PySSLErrorObject, NULL);
-    PySSLWantWriteErrorObject = PyErr_NewExceptionWithDoc(
-        "ssl.SSLWantWriteError", SSLWantWriteError_doc,
-        PySSLErrorObject, NULL);
-    PySSLSyscallErrorObject = PyErr_NewExceptionWithDoc(
-        "ssl.SSLSyscallError", SSLSyscallError_doc,
-        PySSLErrorObject, NULL);
-    PySSLEOFErrorObject = PyErr_NewExceptionWithDoc(
-        "ssl.SSLEOFError", SSLEOFError_doc,
-        PySSLErrorObject, NULL);
-    if (PySSLZeroReturnErrorObject == NULL
-        || PySSLWantReadErrorObject == NULL
-        || PySSLWantWriteErrorObject == NULL
-        || PySSLSyscallErrorObject == NULL
-        || PySSLEOFErrorObject == NULL)
-        return NULL;
-    if (PyDict_SetItemString(d, "SSLError", PySSLErrorObject) != 0
-        || PyDict_SetItemString(d, "SSLZeroReturnError", PySSLZeroReturnErrorObject) != 0
-        || PyDict_SetItemString(d, "SSLWantReadError", PySSLWantReadErrorObject) != 0
-        || PyDict_SetItemString(d, "SSLWantWriteError", PySSLWantWriteErrorObject) != 0
-        || PyDict_SetItemString(d, "SSLSyscallError", PySSLSyscallErrorObject) != 0
-        || PyDict_SetItemString(d, "SSLEOFError", PySSLEOFErrorObject) != 0)
-        return NULL;
-    if (PyDict_SetItemString(d, "_SSLContext",
-                             (PyObject *)&PySSLContext_Type) != 0)
-        return NULL;
-    if (PyDict_SetItemString(d, "_SSLSocket",
-                             (PyObject *)&PySSLSocket_Type) != 0)
-        return NULL;
-    if (PyDict_SetItemString(d, "MemoryBIO",
-                             (PyObject *)&PySSLMemoryBIO_Type) != 0)
-        return NULL;
-    PyModule_AddIntConstant(m, "SSL_ERROR_ZERO_RETURN",
-                            PY_SSL_ERROR_ZERO_RETURN);
-    PyModule_AddIntConstant(m, "SSL_ERROR_WANT_READ",
-                            PY_SSL_ERROR_WANT_READ);
-    PyModule_AddIntConstant(m, "SSL_ERROR_WANT_WRITE",
-                            PY_SSL_ERROR_WANT_WRITE);
-    PyModule_AddIntConstant(m, "SSL_ERROR_WANT_X509_LOOKUP",
-                            PY_SSL_ERROR_WANT_X509_LOOKUP);
-    PyModule_AddIntConstant(m, "SSL_ERROR_SYSCALL",
-                            PY_SSL_ERROR_SYSCALL);
-    PyModule_AddIntConstant(m, "SSL_ERROR_SSL",
-                            PY_SSL_ERROR_SSL);
-    PyModule_AddIntConstant(m, "SSL_ERROR_WANT_CONNECT",
-                            PY_SSL_ERROR_WANT_CONNECT);
-    /* non ssl.h errorcodes */
-    PyModule_AddIntConstant(m, "SSL_ERROR_EOF",
-                            PY_SSL_ERROR_EOF);
-    PyModule_AddIntConstant(m, "SSL_ERROR_INVALID_ERROR_CODE",
-                            PY_SSL_ERROR_INVALID_ERROR_CODE);
-    /* cert requirements */
-    PyModule_AddIntConstant(m, "CERT_NONE",
-                            PY_SSL_CERT_NONE);
-    PyModule_AddIntConstant(m, "CERT_OPTIONAL",
-                            PY_SSL_CERT_OPTIONAL);
-    PyModule_AddIntConstant(m, "CERT_REQUIRED",
-                            PY_SSL_CERT_REQUIRED);
-    /* CRL verification for verification_flags */
-    PyModule_AddIntConstant(m, "VERIFY_DEFAULT",
-                            0);
-    PyModule_AddIntConstant(m, "VERIFY_CRL_CHECK_LEAF",
-                            X509_V_FLAG_CRL_CHECK);
-    PyModule_AddIntConstant(m, "VERIFY_CRL_CHECK_CHAIN",
-                            X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL);
-    PyModule_AddIntConstant(m, "VERIFY_X509_STRICT",
-                            X509_V_FLAG_X509_STRICT);
-#ifdef X509_V_FLAG_TRUSTED_FIRST
-    PyModule_AddIntConstant(m, "VERIFY_X509_TRUSTED_FIRST",
-                            X509_V_FLAG_TRUSTED_FIRST);
-#endif
-
-    /* Alert Descriptions from ssl.h */
-    /* note RESERVED constants no longer intended for use have been removed */
-    /* http://www.iana.org/assignments/tls-parameters/tls-parameters.xml#tls-parameters-6 */
-
-#define ADD_AD_CONSTANT(s) \
-    PyModule_AddIntConstant(m, "ALERT_DESCRIPTION_"#s, \
-                            SSL_AD_##s)
-
-    ADD_AD_CONSTANT(CLOSE_NOTIFY);
-    ADD_AD_CONSTANT(UNEXPECTED_MESSAGE);
-    ADD_AD_CONSTANT(BAD_RECORD_MAC);
-    ADD_AD_CONSTANT(RECORD_OVERFLOW);
-    ADD_AD_CONSTANT(DECOMPRESSION_FAILURE);
-    ADD_AD_CONSTANT(HANDSHAKE_FAILURE);
-    ADD_AD_CONSTANT(BAD_CERTIFICATE);
-    ADD_AD_CONSTANT(UNSUPPORTED_CERTIFICATE);
-    ADD_AD_CONSTANT(CERTIFICATE_REVOKED);
-    ADD_AD_CONSTANT(CERTIFICATE_EXPIRED);
-    ADD_AD_CONSTANT(CERTIFICATE_UNKNOWN);
-    ADD_AD_CONSTANT(ILLEGAL_PARAMETER);
-    ADD_AD_CONSTANT(UNKNOWN_CA);
-    ADD_AD_CONSTANT(ACCESS_DENIED);
-    ADD_AD_CONSTANT(DECODE_ERROR);
-    ADD_AD_CONSTANT(DECRYPT_ERROR);
-    ADD_AD_CONSTANT(PROTOCOL_VERSION);
-    ADD_AD_CONSTANT(INSUFFICIENT_SECURITY);
-    ADD_AD_CONSTANT(INTERNAL_ERROR);
-    ADD_AD_CONSTANT(USER_CANCELLED);
-    ADD_AD_CONSTANT(NO_RENEGOTIATION);
-    /* Not all constants are in old OpenSSL versions */
-#ifdef SSL_AD_UNSUPPORTED_EXTENSION
-    ADD_AD_CONSTANT(UNSUPPORTED_EXTENSION);
-#endif
-#ifdef SSL_AD_CERTIFICATE_UNOBTAINABLE
-    ADD_AD_CONSTANT(CERTIFICATE_UNOBTAINABLE);
-#endif
-#ifdef SSL_AD_UNRECOGNIZED_NAME
-    ADD_AD_CONSTANT(UNRECOGNIZED_NAME);
-#endif
-#ifdef SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE
-    ADD_AD_CONSTANT(BAD_CERTIFICATE_STATUS_RESPONSE);
-#endif
-#ifdef SSL_AD_BAD_CERTIFICATE_HASH_VALUE
-    ADD_AD_CONSTANT(BAD_CERTIFICATE_HASH_VALUE);
-#endif
-#ifdef SSL_AD_UNKNOWN_PSK_IDENTITY
-    ADD_AD_CONSTANT(UNKNOWN_PSK_IDENTITY);
-#endif
-
-#undef ADD_AD_CONSTANT
-
-    /* protocol versions */
-#ifndef OPENSSL_NO_SSL2
-    PyModule_AddIntConstant(m, "PROTOCOL_SSLv2",
-                            PY_SSL_VERSION_SSL2);
-#endif
-#ifndef OPENSSL_NO_SSL3
-    PyModule_AddIntConstant(m, "PROTOCOL_SSLv3",
-                            PY_SSL_VERSION_SSL3);
-#endif
-    PyModule_AddIntConstant(m, "PROTOCOL_SSLv23",
-                            PY_SSL_VERSION_SSL23);
-    PyModule_AddIntConstant(m, "PROTOCOL_TLSv1",
-                            PY_SSL_VERSION_TLS1);
-#if HAVE_TLSv1_2
-    PyModule_AddIntConstant(m, "PROTOCOL_TLSv1_1",
-                            PY_SSL_VERSION_TLS1_1);
-    PyModule_AddIntConstant(m, "PROTOCOL_TLSv1_2",
-                            PY_SSL_VERSION_TLS1_2);
-#endif
-
-    /* protocol options */
-    PyModule_AddIntConstant(m, "OP_ALL",
-                            SSL_OP_ALL & ~SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
-    PyModule_AddIntConstant(m, "OP_NO_SSLv2", SSL_OP_NO_SSLv2);
-    PyModule_AddIntConstant(m, "OP_NO_SSLv3", SSL_OP_NO_SSLv3);
-    PyModule_AddIntConstant(m, "OP_NO_TLSv1", SSL_OP_NO_TLSv1);
-#if HAVE_TLSv1_2
-    PyModule_AddIntConstant(m, "OP_NO_TLSv1_1", SSL_OP_NO_TLSv1_1);
-    PyModule_AddIntConstant(m, "OP_NO_TLSv1_2", SSL_OP_NO_TLSv1_2);
-#endif
-    PyModule_AddIntConstant(m, "OP_CIPHER_SERVER_PREFERENCE",
-                            SSL_OP_CIPHER_SERVER_PREFERENCE);
-    PyModule_AddIntConstant(m, "OP_SINGLE_DH_USE", SSL_OP_SINGLE_DH_USE);
-#ifdef SSL_OP_SINGLE_ECDH_USE
-    PyModule_AddIntConstant(m, "OP_SINGLE_ECDH_USE", SSL_OP_SINGLE_ECDH_USE);
-#endif
-#ifdef SSL_OP_NO_COMPRESSION
-    PyModule_AddIntConstant(m, "OP_NO_COMPRESSION",
-                            SSL_OP_NO_COMPRESSION);
-#endif
-
-#if HAVE_SNI
-    r = Py_True;
-#else
-    r = Py_False;
-#endif
-    Py_INCREF(r);
-    PyModule_AddObject(m, "HAS_SNI", r);
-
-    r = Py_True;
-    Py_INCREF(r);
-    PyModule_AddObject(m, "HAS_TLS_UNIQUE", r);
-
-#ifdef OPENSSL_NO_ECDH
-    r = Py_False;
-#else
-    r = Py_True;
-#endif
-    Py_INCREF(r);
-    PyModule_AddObject(m, "HAS_ECDH", r);
-
-#ifdef OPENSSL_NPN_NEGOTIATED
-    r = Py_True;
-#else
-    r = Py_False;
-#endif
-    Py_INCREF(r);
-    PyModule_AddObject(m, "HAS_NPN", r);
-
-#ifdef HAVE_ALPN
-    r = Py_True;
-#else
-    r = Py_False;
-#endif
-    Py_INCREF(r);
-    PyModule_AddObject(m, "HAS_ALPN", r);
-
-    /* Mappings for error codes */
-    err_codes_to_names = PyDict_New();
-    err_names_to_codes = PyDict_New();
-    if (err_codes_to_names == NULL || err_names_to_codes == NULL)
-        return NULL;
-    errcode = error_codes;
-    while (errcode->mnemonic != NULL) {
-        PyObject *mnemo, *key;
-        mnemo = PyUnicode_FromString(errcode->mnemonic);
-        key = Py_BuildValue("ii", errcode->library, errcode->reason);
-        if (mnemo == NULL || key == NULL)
-            return NULL;
-        if (PyDict_SetItem(err_codes_to_names, key, mnemo))
-            return NULL;
-        if (PyDict_SetItem(err_names_to_codes, mnemo, key))
-            return NULL;
-        Py_DECREF(key);
-        Py_DECREF(mnemo);
-        errcode++;
-    }
-    if (PyModule_AddObject(m, "err_codes_to_names", err_codes_to_names))
-        return NULL;
-    if (PyModule_AddObject(m, "err_names_to_codes", err_names_to_codes))
-        return NULL;
-
-    lib_codes_to_names = PyDict_New();
-    if (lib_codes_to_names == NULL)
-        return NULL;
-    libcode = library_codes;
-    while (libcode->library != NULL) {
-        PyObject *mnemo, *key;
-        key = PyLong_FromLong(libcode->code);
-        mnemo = PyUnicode_FromString(libcode->library);
-        if (key == NULL || mnemo == NULL)
-            return NULL;
-        if (PyDict_SetItem(lib_codes_to_names, key, mnemo))
-            return NULL;
-        Py_DECREF(key);
-        Py_DECREF(mnemo);
-        libcode++;
-    }
-    if (PyModule_AddObject(m, "lib_codes_to_names", lib_codes_to_names))
-        return NULL;
-
-    /* OpenSSL version */
-    /* SSLeay() gives us the version of the library linked against,
-       which could be different from the headers version.
-    */
-    libver = SSLeay();
-    r = PyLong_FromUnsignedLong(libver);
-    if (r == NULL)
-        return NULL;
-    if (PyModule_AddObject(m, "OPENSSL_VERSION_NUMBER", r))
-        return NULL;
-    parse_openssl_version(libver, &major, &minor, &fix, &patch, &status);
-    r = Py_BuildValue("IIIII", major, minor, fix, patch, status);
-    if (r == NULL || PyModule_AddObject(m, "OPENSSL_VERSION_INFO", r))
-        return NULL;
-    r = PyUnicode_FromString(SSLeay_version(SSLEAY_VERSION));
-    if (r == NULL || PyModule_AddObject(m, "OPENSSL_VERSION", r))
-        return NULL;
-
-    libver = OPENSSL_VERSION_NUMBER;
-    parse_openssl_version(libver, &major, &minor, &fix, &patch, &status);
-    r = Py_BuildValue("IIIII", major, minor, fix, patch, status);
-    if (r == NULL || PyModule_AddObject(m, "_OPENSSL_API_VERSION", r))
-        return NULL;
-
-    return m;
-}
+#ifndef _SSL_ENUM_CRLS_METHODDEF
+    #define _SSL_ENUM_CRLS_METHODDEF
+#endif /* !defined(_SSL_ENUM_CRLS_METHODDEF) */
+/*[clinic end generated code: output=a14999cb565a69a2 input=a9049054013a1b77]*/

-- 
Repository URL: https://hg.python.org/cpython


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