Here is my Python code, I can successfully encrypt and decrypt using M2Crypto:
from base64 import b64encode, b64decode
import M2Crypto
class AESEncryptionService(object):
def encrypt(self, key, msg):
return self.__cipher(key, msg, 1)
def decrypt(self, key, msg):
try:
decrypted = self.__cipher(key, msg, 0)
return decrypted
except:
return False
def __cipher(self, key, msg, op):
iv = '\0' * 16
iv.encode('ascii')
cipher = M2Crypto.EVP.Cipher(alg='aes_128_cbc', key=key, iv=iv, op=op)
v = cipher.update(msg)
v = v + cipher.final()
del cipher
return v
enc_service = AESEncryptionService()
cipher = b64encode(enc_service.encrypt("FD496E240E7822552BC0D63C03AB7ABB", "Hello Hello Hello Hello Hello Hello Hello"))
print cipher
plaintext = enc_service.decrypt("FD496E240E7822552BC0D63C03AB7ABB", b64decode(cipher))
print plaintext
Outputs:
oMkdgXOy49VvvbQksxuhBq3YqJWrEw++lZO3ZMYYyo6T7JpK+Ovp+tdm+FrVGPnN
Hello Hello Hello Hello Hello Hello Hello
I have written a simple test script in PHP hoping to get the same results:
<?php
$key = 'FD496E240E7822552BC0D63C03AB7ABB';
$plain = 'Hello Hello Hello Hello Hello Hello Hello';
$iv = '0000000000000000';
$cipher = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $plain, MCRYPT_MODE_CBC, $iv);
$plain = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, $cipher, MCRYPT_MODE_CBC, $iv);
echo base64_encode($cipher), '<br>';
echo $plain;
Outputs:
v5QinnNaEkn8myZa31Ikl5DrrtSXrhebDERJz4uqUgWMvbZ3datyCbm9WHPGlAo7
Hello Hello Hello Hello Hello Hello Hello
Can you help me fix the Python code to output the same as PHP? I know PHP's implementation of AES is correct as I can decrypt it in .NET. The string outputted by M2Crypto Python library cannot be decrypted in .NET.
I think it might have something to do with padding.
M2Crypto.EVP.Cipher has padding parameter. I have tried setting it to 1, 2, 3, 128 but it doesn't seem to affect the cipher.
