[issue19254] Python implementation of PBKDF2_HMAC

2013-10-19 Thread Roundup Robot 

Roundup Robot added the comment:

New changeset e73627483d2f by Christian Heimes in branch 'default':
Issue #19254: Provide an optimized Python implementation of PBKDF2_HMAC
http://hg.python.org/cpython/rev/e73627483d2f

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[issue19254] Python implementation of PBKDF2_HMAC

2013-10-19 Thread Christian Heimes 

Christian Heimes added the comment:

Serhiy, I have taken your review into account. I still need to use memoryview() 
in order to handle all types that are supported by the format char y*.

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components: +Library (Lib)
resolution:  - fixed
stage: patch review - committed/rejected
status: open - closed

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[issue19254] Python implementation of PBKDF2_HMAC

2013-10-14 Thread Christian Heimes 

Christian Heimes added the comment:

Here is an optimized version with inline HMAC.

Contrary to the implementations in OpenSSL, PyCrypto, and pbkdf2.py the length 
of the password has almost no impact on the runtime of my implementation.

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Added file: http://bugs.python.org/file32112/pbkdf2_py2.patch

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[issue19254] Python implementation of PBKDF2_HMAC

2013-10-14 Thread Christian Heimes 

Christian Heimes added the comment:

I have optimized XOR and now it's even faster than OpenSSL's code for 
reasonable long passwords. :(

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Added file: http://bugs.python.org/file32113/pbkdf2_py3.patch

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[issue19254] Python implementation of PBKDF2_HMAC

2013-10-14 Thread Stefan Krah 

Changes by Stefan Krah stefan-use...@bytereef.org:


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[issue19254] Python implementation of PBKDF2_HMAC

2013-10-14 Thread Antoine Pitrou 

Antoine Pitrou added the comment:

 I have optimized XOR and now it's even faster than OpenSSL's code for
 reasonable long passwords. :(

Uh... and it gives the right results? Perhaps OpenSSL should be reimplemented 
in Python :-)

If your code is resistant to timing attacks, I suppose we don't need the C 
implementation anymore? Or does it have a larger startup cost?
(what is a reasonably long password for you? 10 chars or 64? :-))

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[issue19254] Python implementation of PBKDF2_HMAC

2013-10-14 Thread Serhiy Storchaka 

Serhiy Storchaka added the comment:

Christian, does you noticed my comments on Rietveld?

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[issue19254] Python implementation of PBKDF2_HMAC

2013-10-13 Thread Christian Heimes 

New submission from Christian Heimes:

The patch provides a Python implementation of pbkdf2_hmac with Python's hmac 
module. Although I'm using some tricks it's more than six times slower than 
OpenSSL's implementation.

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files: pbkdf2_py.patch
keywords: patch
messages: 199808
nosy: christian.heimes
priority: normal
severity: normal
stage: patch review
status: open
title: Python implementation of PBKDF2_HMAC
type: enhancement
versions: Python 3.4
Added file: http://bugs.python.org/file32101/pbkdf2_py.patch

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