[pyOpenSSL-Users] Pyopenssl pkcs12 to CER

[Amacher Antoine]

Hello guys,

I am having trouble reading the .cer file after a conversion from 
.pkcs12 or .pem.

I used as an original both(.pkcs12, .pem) and convert them to .cer from 
openssl command on my debian system, it works great I can read the 
certificate with openssl command.

Now when I tried to do the same with pyopenssl, the conversion from 
.pkcs12 to .pem works fine my file is readable, on the other hand the 
.pem to .cer or .pkcs12 to .cer doesnt work. I can't open my .cer file 
on Windows(which is my purpose and I don't want to use openssl for 
windows) or can't read it from openssl.(I included my privatekey in 
every case and also try without it)

I made some search on the error message I got from openssl:

unable to load certificate
140213359912616:error:0D0680A8:asn1 encoding 
routines:ASN1_CHECK_TLEN:wrong tag:tasn_dec.c:1319:
140213359912616:error:0D07803A:asn1 encoding 
routines:ASN1_ITEM_EX_D2I:nested asn1 error:tasn_dec.c:381:Type=X509_CINF
140213359912616:error:0D08303A:asn1 encoding 
routines:ASN1_TEMPLATE_NOEXP_D2I:nested asn1 
error:tasn_dec.c:751:Field=cert_info, Type=X509

And the lead which is most probable would be that I tried to open the 
file with this command 'openssl x509 -in mycert.cer -inform DER -text' 
where I should work around using base64 instead of X509, while I am 
digging through this I'd like to know if I can convert from .pem or 
.pkcs12 to be a .cer with pyopenssl and get a readable file.

Thanks,

-- 
Antoine Amacher
aamacher at inverse.ca  ::  +1.514.447.4918 *130  ::  www.inverse.ca
Inverse inc. :: Leaders behind SOGo (www.sogo.nu) and PacketFence (www.packetfence.org)