ifalg 0.1

Library to interface with the Linux kernel crypto API

Python ifalg

ifalg is a Python 3 library to interface with the Linux kernel crypto API. This is generally slower than using a library like OpenSSL or PyCrypto, but it could be useful if you have cryptographic hardware supported by Linux.

Features

• For the moment only skcipher and hash algorithms are supported.

• Algorithm metadata is parsed from /proc/crypto

Samples

Using a hash algorithm:

>>> from ifalg import Hash
>>> hash = Hash('sha1')
>>> hash.hexdigest(b'hello world')
'2aae6c35c94fcfb415dbe95f408b9ce91ee846ed'

Using a keyed hash algorithm:

>>> from ifalg import Hash
>>> hash = Hash('cmac(des3_ede)', key=bytes.fromhex('8aa83bf8cbda10620bc1bf19fbb6cd58bc313d4a371ca8b5'))
>>> hash.hexdigest(bytes.fromhex('6bc1bee22e409f96'))
'8e8f293136283797'

Encryption and Decryption:

>>> from ifalg import SKCipher
>>> cipher = SKCipher('cbc(aes)', key=bytes.fromhex('790afba9cfbc095b682666a6999a38ed'), iv=bytes.fromhex('fb1f88c0f23d6aa6dde475c018d7f482'))
>>> msg = bytes.fromhex('4e0c74c8d67862a9732604f62f4ad316')
>>> cipherText = cipher.encrypt(msg)
>>> cipherText
b'\x7ftT$Z\xf4\xe6|\xd2)cA\xf2\x1d\xcb\xa9'
>>> plainText = cipher.decrypt(cipherText)
>>> plainText
b'N\x0ct\xc8\xd6xb\xa9s&\x04\xf6/J\xd3\x16'
>>> plainText == msg
True