Where i can find an AES implementation in python?

Question

Where i can find a "reviewed" version of AES implementation in python. Not an API like PyCrypto whereby you can call AES algorithms in a single line.

Answer 1

Have a look at pyCrypto. It is also linked by the official python doc. As you can see in the pyCrypto doc it implements the following encryption algorithms:

AES 16, 24, or 32 bytes/16 bytes
ARC2 Variable/8 bytes
Blowfish Variable/8 bytes
CAST Variable/8 bytes
DES 8 bytes/8 bytes
DES3 16 bytes/8 bytes
IDEA 16 bytes/8 bytes
RC5 Variable/8 bytes

As you already pointed out:

Some modules are implemented in C for performance; others are written in Python for ease of modification. Generally, low-level functions like ciphers and hash functions are written in C, while less speed-critical functions have been written in Python.

There are also some interesting tutorials:

• Symmetric Encryption with PyCrypto, Part I
• Symmetric Encryption with PyCrypto, Part II
• Symmetric Encryption with PyCrypto, Part III

[update] found a python implementation of aes here and here. I did not verify if it works well.

Answer 2

This is an implementation of AES written completely in Python.

It's not written as a library, it's a program to encrypt files, but looking at the source (which is a single file) the entire AES workings are implemented within it.

There are publicly available test vectors from CMVP for validating that an AES implementation conforms to the spec properly. However, this alone does not address the many pragmatic problems an implementation may have.