Perl Crypy::CBC (Blowfish) -> Python Crypto

decrypt.py

import base64
from Crypto.Cipher import Blowfish
from binascii import unhexlify
from struct import pack

key = unhexlify('144a6b229633360207ff9c79016fc49426f1814727b663bc39df05df9a1892073e2812df9492c1e952aac68d1ddfefba635d3a33aba21535')  # "thisiskey"
iv = '123abc45'


def enc(str):
    plen = Blowfish.block_size - len(str) % Blowfish.block_size
    padding = [plen] * plen
    pad_str = str + pack('b' * plen, *padding)
    cipher = Blowfish.new(key, Blowfish.MODE_CBC, iv)
    return base64.urlsafe_b64encode(cipher.encrypt(pad_str))


def dec(str):
    plen = 4 - len(str) & 3
    pad_str = str + '=' * plen
    cipher = Blowfish.new(key, Blowfish.MODE_CBC, iv)
    dec = cipher.decrypt(base64.urlsafe_b64decode(pad_str))
    num_padding = ord(dec[-1])
    return dec[:(-1 * num_padding)]

assert enc('1234567') == '7Zbfy4S_B28='
assert enc('12345678') == '_V5IPxYq4omALzIyl10aMw=='

assert enc('hello world') == 'V6r02_ivXP2ChJ0DGd_7aw=='
assert dec('V6r02_ivXP2ChJ0DGd_7aw==') == 'hello world'
assert dec('V6r02_ivXP2ChJ0DGd_7aw') == dec('V6r02_ivXP2ChJ0DGd_7aw=') == dec('V6r02_ivXP2ChJ0DGd_7aw==') == dec('V6r02_ivXP2ChJ0DGd_7aw===')

publish_hex_key.pl

use strict;
use warnings;

# http://stackoverflow.com/questions/14859006/using-pycrypto-to-decrypt-perl-encrypted-password

use Crypt::CBC;

my $key = shift or die '[usage] hex_key.pl key';

my $cipher = Crypt::CBC->new({
        'key'            => $key,
        'cipher'         => 'Blowfish',
        'iv'             => '12345678',
        'regenerate_key' => 1,
        'padding'        => 'standard',
        'prepend_iv'     => 0,
    });

$cipher->encrypt('ShutTheFuckUpAndWriteSomeCode');
print unpack('H*', $cipher->key), "\n";

thanks for your gist, i needed something like this but for DES,
to replace the hex_key pl, i added the below code.

def get_key(key):
    """Crypt::CBC decides that the key you give is not good enough
    and encrypts its further, but we do not use the new enc key entirely,
    we still have to keep the length, to the actual length of the key
    """
    nkey = md5(key.encode()).digest()
    if len(nkey) < len(key):
        nkey = get_key(nkey)
    else:
        nkey = nkey[:len(key)]
    return nkey