CODEWITHSUNDEEP
javascriptpythonencryptionaes
darthguinea
darthguinea

Reputation: 115

Python Javascript CryptoJS

I am looking for a module that I can use in both python & javascript so that can encrypt something in python then decrypt in javascript if I pass in a key (and vice versa).

So far I've checked out SlowAES and CryptoJS, but cant find any good documentation or examples. Is anyone able to help?

Below is my attempt to get this working:

JS:

var encoded_message = 'MTAxMTEyMTMxNDE1MTYxN2asfw3LtCtoL+mvWtJsIVSVCsvZdBIvZWWRuKEI85nd';
var my_iv = CryptoJS.enc.Base64.parse('1011121314151617');
var my_key = CryptoJS.enc.Base64.parse('824601be6c2941fabe7fe256d4d5a2b7');

console.log('my iv [' + my_iv + ']');
console.log('my key [' + my_key + ']');
console.log('my enc message [' + encoded_message + ']');

var data = CryptoJS.AES.decrypt(encoded_message, my_key, { iv: my_iv, mode: CryptoJS.mode.CBC });
console.log(data);
var dec = CryptoJS.enc.Hex.stringify(data);
console.log('data [' + dec + ']');


var encoded_message = CryptoJS.enc.Base64.parse('MTAxMTEyMTMxNDE1MTYxN2asfw3LtCtoL+mvWtJsIVSVCsvZdBIvZWWRuKEI85nd');
console.log('\n\n\n');
console.log('message [' + encoded_message + ']');

Python:

import os, random, struct
from Crypto.Cipher import AES
from Crypto import Random
import base64
class AESCipher:
    def __init__(self, key):
        BS = 16
        self.pad = lambda s: s + (BS - len(s) % BS) * chr(BS - len(s) % BS)
        self.unpad = lambda s : s[0:-ord(s[-1])]
        self.key = self.pad(key[0:16])

    def encrypt(self, raw):
        raw = self.pad(raw)
        iv = "1011121314151617"
        cipher = AES.new(self.key, AES.MODE_CBC, iv)
        return base64.b64encode(iv + cipher.encrypt(raw))

    def decrypt(self, enc):
        enc = enc.replace(' ', '+')
        enc = base64.b64decode(enc)
        iv = enc[:16]
        cipher = AES.new(self.key, AES.MODE_CBC, iv)
        return self.unpad(cipher.decrypt(enc[16:]))


def main():     

    message = 'this is my new message'
    print message[:16]

    cipher = AESCipher('824601be6c2941fabe7fe256d4d5a2b7')
    encrypteddata = cipher.encrypt('work you bloody thing!')
    print encrypteddata         

    decryptdata =cipher.decrypt(encrypteddata)
    print decryptdata 

main()

Upvotes: 0

Views: 3085

Answers (1)

Keith
Keith

Reputation: 24231

I've recently been using sjcl in Javascript,.. http://bitwiseshiftleft.github.io/sjcl/

They also appears to be a python compatible version. https://pypi.python.org/pypi/sjcl

At it's simplest you can just do ->

sjcl.encrypt("password", "data")

and

sjcl.decrypt("password", "encrypted-data")

But you still can do low level stuff with it too.

Upvotes: 2

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