tgcrypto/tests/ctr/test_ctr.py

import unittest

import tgcrypto


class TestCTR256(unittest.TestCase):
    # https://csrc.nist.gov/CSRC/media/Projects/Cryptographic-Standards-and-Guidelines/documents/examples/AES_CTR.pdf

    def test_ctr256_encrypt(self):
        key = bytes.fromhex("""
        603DEB10 15CA71BE 2B73AEF0 857D7781
        1F352C07 3B6108D7 2D9810A3 0914DFF4
        """.replace(" ", "").replace("\n", ""))

        iv = bytes.fromhex("""
        F0F1F2F3 F4F5F6F7 F8F9FAFB FCFDFEFF
        """.replace(" ", "").replace("\n", ""))

        plaintext = bytes.fromhex("""
        6BC1BEE2 2E409F96 E93D7E11 7393172A
        AE2D8A57 1E03AC9C 9EB76FAC 45AF8E51
        30C81C46 A35CE411 E5FBC119 1A0A52EF
        F69F2445 DF4F9B17 AD2B417B E66C3710
        """.replace(" ", "").replace("\n", ""))

        ciphertext = bytes.fromhex("""
        601EC313 775789A5 B7A7F504 BBF3D228
        F443E3CA 4D62B59A CA84E990 CACAF5C5
        2B0930DA A23DE94C E87017BA 2D84988D
        DFC9C58D B67AADA6 13C2DD08 457941A6
        """.replace(" ", "").replace("\n", ""))

        self.assertEqual(tgcrypto.ctr256_encrypt(plaintext, key, iv, bytes(1)), ciphertext)

    def test_ctr256_decrypt(self):
        key = bytes.fromhex("""
        603DEB10 15CA71BE 2B73AEF0 857D7781
        1F352C07 3B6108D7 2D9810A3 0914DFF4
        """.replace(" ", "").replace("\n", ""))

        iv = bytes.fromhex("""
        F0F1F2F3 F4F5F6F7 F8F9FAFB FCFDFEFF
        """.replace(" ", "").replace("\n", ""))

        ciphertext = bytes.fromhex("""
        601EC313 775789A5 B7A7F504 BBF3D228
        F443E3CA 4D62B59A CA84E990 CACAF5C5
        2B0930DA A23DE94C E87017BA 2D84988D
        DFC9C58D B67AADA6 13C2DD08 457941A6
        """.replace(" ", "").replace("\n", ""))

        plaintext = bytes.fromhex("""
        6BC1BEE2 2E409F96 E93D7E11 7393172A
        AE2D8A57 1E03AC9C 9EB76FAC 45AF8E51
        30C81C46 A35CE411 E5FBC119 1A0A52EF
        F69F2445 DF4F9B17 AD2B417B E66C3710
        """.replace(" ", "").replace("\n", ""))

        self.assertEqual(tgcrypto.ctr256_decrypt(ciphertext, key, iv, bytes(1)), plaintext)

    # https://github.com/pyca/cryptography/blob/cd4de3ce6dc2a0dd4171b869e187857e4125853b/vectors/cryptography_vectors/ciphers/AES/CTR/aes-256-ctr.txt

    def test_ctr256_encrypt_extra1(self):
        key = bytes.fromhex("776BEFF2851DB06F4C8A0542C8696F6C6A81AF1EEC96B4D37FC1D689E6C1C104")
        iv = bytes.fromhex("00000060DB5672C97AA8F0B200000001")
        plaintext = bytes.fromhex("53696E676C6520626C6F636B206D7367")
        ciphertext = bytes.fromhex("145AD01DBF824EC7560863DC71E3E0C0")

        self.assertEqual(tgcrypto.ctr256_encrypt(plaintext, key, iv, bytes(1)), ciphertext)

    def test_ctr256_encrypt_extra2(self):
        key = bytes.fromhex("F6D66D6BD52D59BB0796365879EFF886C66DD51A5B6A99744B50590C87A23884")
        iv = bytes.fromhex("00FAAC24C1585EF15A43D87500000001")
        plaintext = bytes.fromhex("000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F")
        ciphertext = bytes.fromhex("F05E231B3894612C49EE000B804EB2A9B8306B508F839D6A5530831D9344AF1C")

        self.assertEqual(tgcrypto.ctr256_encrypt(plaintext, key, iv, bytes(1)), ciphertext)

    def test_ctr256_encrypt_extra3(self):
        key = bytes.fromhex("FF7A617CE69148E4F1726E2F43581DE2AA62D9F805532EDFF1EED687FB54153D")
        iv = bytes.fromhex("001CC5B751A51D70A1C1114800000001")
        plaintext = bytes.fromhex("000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F20212223")
        ciphertext = bytes.fromhex("EB6C52821D0BBBF7CE7594462ACA4FAAB407DF866569FD07F48CC0B583D6071F1EC0E6B8")

        self.assertEqual(tgcrypto.ctr256_encrypt(plaintext, key, iv, bytes(1)), ciphertext)


if __name__ == "__main__":
    unittest.main()