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<H1><A NAME="SECTION00080000000000000000">
Extending the Toolkit</A>
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<P>
Preserving the a common interface for cryptographic routines is a good
idea. This chapter explains how to write new modules for the Toolkit.
<P>
The basic process is as follows:
<OL>
<LI>Add a new .c file containing an implementation of the new
algorithm.
This file must define 3 or 4 standard functions,
a few constants, and a C struct encapsulating the state variables required by the algorithm.
<P>
</LI>
<LI>Add the new algorithm to setup.py.
<P>
</LI>
<LI>Send a copy of the code to me, if you like; code for new
algorithms will be gratefully accepted.
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<LI><A NAME="tex2html324"
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<LI><A NAME="tex2html325"
HREF="node24.html">Adding Block Encryption Algorithms</A>
<LI><A NAME="tex2html326"
HREF="node25.html">Adding Stream Encryption Algorithms</A>
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