Untitled

Decrypt in Python an encrypted message in Java
EVPError: 'wrong final block length'

import M2Crypto
from base64 import b64encode, b64decode

ENC=1
DEC=0

def AES_build_cipher(key, iv, op=ENC):
    """"""""
    return M2Crypto.EVP.Cipher(alg='aes_128_cbc', key=key, iv=iv, op=op)

def AES_encryptor(key,msg, iv=None):
    """"""
    #Decode the key and iv
    key = b64decode(key)
    if iv is None:
        iv = '' * 16
    else:
        iv = b64decode(iv)

   # Return the encryption function
    def encrypt(data):
        cipher = AES_build_cipher(key, iv, ENC)
        v = cipher.update(data)
        v = v + cipher.final()
        del cipher
        v = b64encode(v)
        return v
    print "AES encryption successfuln"
    return encrypt(msg)

def AES_decryptor(key,msg, iv=None):
    """"""
    #Decode the key and iv
    key = b64decode(key)
    print key
    print
    if iv is None:
        iv = '' * 16
    else:
        iv = b64decode(iv)

   # Return the decryption function
    def decrypt(data):
        data = b64decode(data)
        cipher = AES_build_cipher(key, iv, DEC)
        v = cipher.update(data)
        v = v + cipher.final()
        del cipher
        return v
    print "AES dencryption successfuln"
    return decrypt(msg)

if __name__ == "__main__":
    result = AES_decryptor(b64encode(SECRET_KEY), msg=encrypted_message)