32 lines
879 B
Python
32 lines
879 B
Python
|
import base64
|
||
|
|
import hashlib
|
||
|
|
from Crypto import Random
|
||
|
|
from Crypto.Cipher import AES
|
||
|
|
|
||
|
|
class AESCipher(object):
|
||
|
|
""" Helper class for encrypting and decrypting data via AES.
|
||
|
|
|
||
|
|
Copied From: http://stackoverflow.com/a/21928790
|
||
|
|
"""
|
||
|
|
def __init__(self, key):
|
||
|
|
self.bs = 32
|
||
|
|
self.key = key
|
||
|
|
|
||
|
|
def encrypt(self, raw):
|
||
|
|
raw = self._pad(raw)
|
||
|
|
iv = Random.new().read(AES.block_size)
|
||
|
|
cipher = AES.new(self.key, AES.MODE_CBC, iv)
|
||
|
|
return base64.b64encode(iv + cipher.encrypt(raw))
|
||
|
|
|
||
|
|
def decrypt(self, enc):
|
||
|
|
enc = base64.b64decode(enc)
|
||
|
|
iv = enc[:AES.block_size]
|
||
|
|
cipher = AES.new(self.key, AES.MODE_CBC, iv)
|
||
|
|
return self._unpad(cipher.decrypt(enc[AES.block_size:])).decode('utf-8')
|
||
|
|
|
||
|
|
def _pad(self, s):
|
||
|
|
return s + (self.bs - len(s) % self.bs) * chr(self.bs - len(s) % self.bs)
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def _unpad(s):
|
||
|
|
return s[:-ord(s[len(s)-1:])]
|