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#!/usr/bin/env python3
# Copyright 2018-2019, The Tor Project, Inc. See LICENSE for licensing info.
# Reference implementation for our rudimentary OPE code, used to
# generate test vectors. See crypto_ope.c for more details.
# Future imports for Python 2.7, mandatory in 3.0
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from cryptography.hazmat.primitives.ciphers.algorithms import AES
from cryptography.hazmat.backends import default_backend
from binascii import a2b_hex
#randomly generated and values.
KEY = a2b_hex(
"19e05891d55232c08c2cad91d612fdb9cbd6691949a0742434a76c80bc6992fe")
PTS = [ 121132, 82283, 72661, 72941, 123122, 12154, 121574, 11391, 65845,
86301, 61284, 70505, 30438, 60150, 114800, 109403, 21893, 123569,
95617, 48561, 53334, 92746, 7110, 9612, 106958, 46889, 87790, 68878,
47917, 121128, 108602, 28217, 69498, 63870, 57542, 122148, 46254,
42850, 92661, 57720]
IV = b'\x00' * 16
backend = default_backend()
def words():
cipher = Cipher(algorithms.AES(KEY), modes.CTR(IV), backend=backend)
e = cipher.encryptor()
while True:
v = e.update(b'\x00\x00')
yield v[0] + 256 * v[1] + 1
def encrypt(n):
return sum(w for w, _ in zip(words(), range(n)))
def example(n):
return ' {{ {}, UINT64_C({}) }},'.format(n, encrypt(n))
for v in PTS:
print(example(v))
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