enc_twice_d2510bedcba044a68a511808863e2eda.py

def KSA(key):
        key_len = len(key)

        S = range(256)

        j = 0
        for i in xrange(256):
                j = (j + S[i] + key[i % key_len]) % 256
                S[i], S[j] = S[j], S[i]

        return S

def PRGA(S):
        i = 0
        j = 0
        while True:
                i = (i + 1) % 256
                j = (j + 1) % 256
                S[i], S[j] = S[j], S[i]

                K = S[(S[i] + S[j]) % 256]
                yield K

def RC4(key):
        S = KSA(key)
        return PRGA(S)

def enc(key, m):
        key = [ord(c) for c in key]
        key_stream = RC4(key)
        cipher = [chr(ord(c) ^ key_stream.next()) for c in m]
        return ''.join(cipher)

def dec(key, cipher):
        key = [ord(c) for c in key]
        key_stream = RC4(key)
        plain = [chr(ord(c) ^ key_stream.next()) for c in cipher]
        return ''.join(plain)

def main():
        k1 = '.....'
        k2 = '.....'
        m = '......'
        cipher = enc(k2, enc(k1, m)).encode('base64')