[pycrypto] FYI: PyCrypto on Google App Engine

Mads Kiilerich mads at kiilerich.com
Sat May 2 07:15:42 CST 2009


App Engine includes a custom version of the Python Cryptography Toolkit 
<http://www.amk.ca/python/code/crypto>, also known as PyCrypto. The 
version included with App Engine is based on pycrypto 2.0.1. This is not 
the latest version <http://pycrypto.org>, but should be largely 
compatible with more recent versions.

For reasons both technical and legal, the App Engine version of PyCrypto 
has the following differences from the original PyCrypto 2.0.1:


      The RC5 and IDEA ciphers have been removed.


      The MODE_PGP encryption mode has been removed.


      All public key cryptography routines are implemented in pure
      Python code. They do not use any native acceleration (C code).

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