コード例 #1
0
def test_sign_and_verify():
    # Setting up the RSA cryptosystem for the test
    p = random_prime(2 ** 512)
    q = random_prime(2 ** 512)
    n = Integer(p * q)
    phi = (p - 1) * (q - 1)
    e = Integer(65537)
    bezout = xgcd(e, phi)
    d = Integer(mod(bezout[1], phi))
    assert mod(d * e, phi) == 1

    # First create an instance of RSASign
    signer = RSASign(None, d, n)

    # Then sign a message
    signed_message = signer.sign("blah")

    # Craft the final message
    final_message = str(signed_message) + "@" + "blah"

    # Verify the final message
    verifier = RSAVerify(None, e, n)
    if not verifier.verify(final_message):
        print "Message has been tampered with, unable to validate"
    else:
        print "Message validated"
コード例 #2
0
def main():
    general_config = ConfigParser.ConfigParser()
    config = ConfigParser.ConfigParser()

    general_config.read('config.cfg')
    config.read('config_user1.cfg')
    host = general_config.get('networking', 'ip')
    port = int(general_config.get('networking', 'port'))
    lower_range_DH = int(general_config.get('crypto', 'lower_range_DH'))
    upper_range_DH = int(general_config.get('crypto', 'upper_range_DH'))

    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.bind((host,port))
    s.listen(5)
    client, address = s.accept()

    other_N, other_e = config.get('crypto_user2', 'N'), config.get('crypto_user2', 'e')
    other_N, other_e = int(other_N), int(other_e)

    N = config.get('crypto_user1', 'N')
    e = config.get('crypto_user1', 'e')
    d = config.get('crypto_user1', 'd')
    p = config.get('crypto_user1', 'p')
    q = config.get('crypto_user1', 'q')


    signer = RSASign(client, d, N)
    verifier = RSAVerify(client, other_e, other_N)

    DH_prime = int(verifier.recv_and_verify())
    generator = common.find_generator(DH_prime)

    x1 = random.randint(lower_range_DH, upper_range_DH)
    y1 = common.modfun(generator, x1, DH_prime)
    signer.sign_and_send(y1)

    y2 = verifier.recv_and_verify()
    y12 = common.modfun(y2, x1, DH_prime)

    print "[+] Negotiated session key", y12