Free Cryptography libraries

Question

What are the most stable and useful Cryptography libraries, that they are:

• written with/for python, c++, c#, .net
• opensource, GNU, or other free license

Answer 1

The standard Python library (implementing common ciphers like AES and RSA) is PyCrypto. It doesn't support things like PKCS yet, however. There is a partial Python wrapper for the Crypto++ library given by PyCryptopp, which you may find useful.

The OpenSSL library is also wrapped for Python by PyOpenSSL. A Python implementation of SSH is Paramiko.