M2Crypto is built from Python, OpenSSL, and SWIG. It makes accessible to the Python programmer DH, DSA, RSA, symmetric ciphers, message digests, HMACs, and SSL and S/MIME functionality.
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Integration with OpenSSL 0.9.5, S/MIME signs, encrypts, decrypts, and verifies, much-improved SSL (SSL cert-based peer authentication with callbacks in Python, an interface to create SSL sessions, and a more robust SSL socket implementation), fixes for (some) multiple-free()'s and memory leaks, more X.509 certificate manipulation, and miscellaneous bugfixes and enhancements.