<div class="gmail_quote">2009/5/3 Dwayne C. Litzenberger <span dir="ltr"><<a href="mailto:dlitz@dlitz.net">dlitz@dlitz.net</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="im">On Sat, May 02, 2009 at 03:15:42PM +0200, Mads Kiilerich wrote:<br>
> <a href="http://code.google.com/appengine/docs/python/tools/libraries.html#PyCrypto" target="_blank">http://code.google.com/appengine/docs/python/tools/libraries.html#PyCrypto</a><br>
><br>
> App Engine includes a custom version of the Python Cryptography Toolkit<br>
> <<a href="http://www.amk.ca/python/code/crypto" target="_blank">http://www.amk.ca/python/code/crypto</a>>, also known as PyCrypto. The version<br>
> included with App Engine is based on pycrypto 2.0.1. This is not the latest<br>
> version <<a href="http://pycrypto.org" target="_blank">http://pycrypto.org</a>>, but should be largely compatible with more<br>
> recent versions.<br>
<br>
</div>Neat. Thanks for pointing this out.<br>
<div class="im"><br>
> For reasons both technical and legal, the App Engine version of PyCrypto<br>
> has the following differences from the original PyCrypto 2.0.1:<br>
><br>
> * The RC5 and IDEA ciphers have been removed.<br>
<br>
</div>Makes sense. RC5 and IDEA are patent-encumbered.<br>
<br>
> * The MODE_PGP encryption mode has been removed.<br>
<br>
Hmm. Does anybody know why MODE_PGP would have been removed?</blockquote><div><br>PGP is a registered company, there may be some trademark/copyright issues there.<br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
<div class="im"><br>
> * All public key cryptography routines are implemented in pure<br>
> Python code. They do not use any native acceleration (C code).<br>
<br>
</div>In other words, they built PyCrypto without the optional support for libgmp<br>
(_fastmath.c).<br>
<font color="#888888"><br>
<br>
--<br>
Dwayne C. Litzenberger <<a href="mailto:dlitz@dlitz.net">dlitz@dlitz.net</a>><br>
Key-signing key - 19E1 1FE8 B3CF F273 ED17 4A24 928C EC13 39C2 5CF7<br>
Annual key (2008) - 4B2A FD82 FC7D 9E38 38D9 179F 1C11 B877 E780 4B45<br>
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</font></blockquote></div><br><br clear="all"><br>-- <br>Sam Phippen<br><br>Please avoid sending me Word or PowerPoint attachments.<br>See <a href="http://www.gnu.org/philosophy/no-word-attachments.html">http://www.gnu.org/philosophy/no-word-attachments.html</a><br>