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<H1>[pycrypto] FYI: PyCrypto on Google App Engine</H1>
<B>Sam Phippen</B>
<A HREF="mailto:pycrypto%40lists.dlitz.net?Subject=%5Bpycrypto%5D%20FYI%3A%20PyCrypto%20on%20Google%20App%20Engine&In-Reply-To=20090503164954.GA17760%40rivest.dlitz.net"
TITLE="[pycrypto] FYI: PyCrypto on Google App Engine">samphippen at googlemail.com
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<I>Sun May 3 12:33:54 CST 2009</I>
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<PRE>2009/5/3 Dwayne C. Litzenberger <<A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">dlitz at dlitz.net</A>>
><i> On Sat, May 02, 2009 at 03:15:42PM +0200, Mads Kiilerich wrote:
</I>><i> >
</I>><i> <A HREF="http://code.google.com/appengine/docs/python/tools/libraries.html#PyCrypto">http://code.google.com/appengine/docs/python/tools/libraries.html#PyCrypto</A>
</I>><i> >
</I>><i> > App Engine includes a custom version of the Python Cryptography Toolkit
</I>><i> > <<A HREF="http://www.amk.ca/python/code/crypto">http://www.amk.ca/python/code/crypto</A>>, also known as PyCrypto. The
</I>><i> version
</I>><i> > included with App Engine is based on pycrypto 2.0.1. This is not the
</I>><i> latest
</I>><i> > version <<A HREF="http://pycrypto.org">http://pycrypto.org</A>>, but should be largely compatible with
</I>><i> more
</I>><i> > recent versions.
</I>><i>
</I>><i> Neat. Thanks for pointing this out.
</I>><i>
</I>><i> > For reasons both technical and legal, the App Engine version of PyCrypto
</I>><i> > has the following differences from the original PyCrypto 2.0.1:
</I>><i> >
</I>><i> > * The RC5 and IDEA ciphers have been removed.
</I>><i>
</I>><i> Makes sense. RC5 and IDEA are patent-encumbered.
</I>><i>
</I>><i> > * The MODE_PGP encryption mode has been removed.
</I>><i>
</I>><i> Hmm. Does anybody know why MODE_PGP would have been removed?
</I>
PGP is a registered company, there may be some trademark/copyright issues
there.
><i>
</I>><i>
</I>><i> > * All public key cryptography routines are implemented in pure
</I>><i> > Python code. They do not use any native acceleration (C code).
</I>><i>
</I>><i> In other words, they built PyCrypto without the optional support for libgmp
</I>><i> (_fastmath.c).
</I>><i>
</I>><i>
</I>><i> --
</I>><i> Dwayne C. Litzenberger <<A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">dlitz at dlitz.net</A>>
</I>><i> Key-signing key - 19E1 1FE8 B3CF F273 ED17 4A24 928C EC13 39C2 5CF7
</I>><i> Annual key (2008) - 4B2A FD82 FC7D 9E38 38D9 179F 1C11 B877 E780 4B45
</I>><i> _______________________________________________
</I>><i> pycrypto mailing list
</I>><i> <A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">pycrypto at lists.dlitz.net</A>
</I>><i> <A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto</A>
</I>><i>
</I>
--
Sam Phippen
Please avoid sending me Word or PowerPoint attachments.
See <A HREF="http://www.gnu.org/philosophy/no-word-attachments.html">http://www.gnu.org/philosophy/no-word-attachments.html</A>
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