[Expat-bugs] [ expat-Bugs-3526620 ] undocumented XML_SetHashSalt(p, 0) semantics

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Bugs item #3526620, was opened at 2012-05-14 08:58
Message generated for change (Tracker Item Submitted) made by jorton
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Joe Orton (jorton)
Assigned to: Nobody/Anonymous (nobody)
Summary: undocumented XML_SetHashSalt(p, 0) semantics

Initial Comment:
Per e-mail discussion:

Tomas Hoger noticed that the semantics of XML_SetHashSalt are surprising
when 0 is passed.  That value does not force a fixed hash salt, as might be
expected from reading the API description, but instead implies use of a
random hash salt, per startParsing():

    if (hash_secret_salt == 0)
      hash_secret_salt = generate_hash_secret_salt();

Which is the desired semantics?  It would be simple to fix either the header
or the implementation.  pyexpat is apparently using XML_SetHashSalt(parser,
0) hoping for a fixed hash salt.

Affects Version: expat 2.1.0

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