gistfile1.py

from base64 import b64decode
from Crypto.Cipher import AES

def descifra_ip(cookie, claveCifrado):
    t = bytearray(b64decode(cookie))
    k = bytearray(b64decode(claveCifrado))
    v = b''
    v2 = bytearray('\0' * 16)
    v3 = b''
    r = b''
    
    k[24:] = t[0:8]
    t = t[8:]
    v = t[8:8+16]
    
    aes = AES.new(buffer(k))
    i = 0
    
    while i < len(t):
        v = t[i:i+16].rjust(16, '\0')
        v3 = v[0:16]
        
        v = bytearray(aes.decrypt(buffer(v)))
        v = xor(v, v2)
        
        v2 = v3[0:16]
        r += v[0:16]
        
        print str(i) + '\t' + repr(v)
        
        i = i + 16
    
    return r
    
def xor(str1, str2):
    ret = bytearray(len(str1))
    
    for i in range(len(str1)):
        ret[i] = str1[i] ^ str2[i]
        
    return ret
    
descifra_ip('93xJGQfvBp6tuYJogOfZoFgPRvvltNLaiZurZKTgi7QWHgTcIcWZCs5Q67Lu1Gv[Q4cfRnPczC5GhN[10bO09yjKYU2sBKR9FAaxuJQVfuEYDs4IJPSGy[5b8Fg1sH]wHaTI3BlyzaQ=', 'DKAE2jDQUpC4AvQgqTDRaniTBQCiMrDE1aNUBIuSnWCg')
print "---"
descifra_ip('qDWGIQ7rYc6wouq2adJXAW1DqZbJTc463Iv48om1TtrmQmig3truDaa[D71XoTcGSK34pSA7[VgQTuqECeE8jW8u9IJZeR4wO39ys6L[L[TWlnePO8FsJ15Zl2RcssDze0[o99JePKc8jaJShReYiBj2RC9XbVuKmPkvLLBw0l7G7gYrZZAZhL[rKsT3XtjwabNPu5eEsWeOL0txaGuckU[rx54T8nABVcKGcooa0c3ULJIEc0YfbeyUYBt5PrRPu1FjjUZcW]gHlAqT3c]icQAyRjvSAmhdMau5d4M2XZl[R7XCz12iFhdp6eW3Y6slCuMjSjKbJC9J6udW7yHkf64I6iXCzRVR[PAOxFAq44Nj5woPAqgGkQ==', 'DKAE2jDQUpC4AvQgqTDRaniTBQCiMrDE1aNUBIuSnWCg')