385 lines
17 KiB
Python
385 lines
17 KiB
Python
# coding: utf-8
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# PyGOST -- Pure Python GOST cryptographic functions library
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# Copyright (C) 2015-2023 Sergey Matveev <stargrave@stargrave.org>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, version 3 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from os import urandom
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from unittest import TestCase
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from pygost.gost28147 import block2ns
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from pygost.gost28147 import BLOCKSIZE
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from pygost.gost28147 import cbc_decrypt
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from pygost.gost28147 import cbc_encrypt
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from pygost.gost28147 import cfb_decrypt
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from pygost.gost28147 import cfb_encrypt
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from pygost.gost28147 import cnt
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from pygost.gost28147 import DEFAULT_SBOX
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from pygost.gost28147 import ecb_decrypt
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from pygost.gost28147 import ecb_encrypt
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from pygost.gost28147 import encrypt
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from pygost.gost28147 import KEYSIZE
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from pygost.gost28147 import MESH_MAX_DATA
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from pygost.gost28147 import ns2block
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from pygost.utils import hexdec
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from pygost.utils import strxor
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class ECBTest(TestCase):
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def test_gcl(self):
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"""Test vectors from libgcl3
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"""
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sbox = "id-Gost28147-89-TestParamSet"
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key = hexdec(b"0475f6e05038fbfad2c7c390edb3ca3d1547124291ae1e8a2f79cd9ed2bcefbd")
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plaintext = bytes(bytearray((
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0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00,
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0x0f, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0x08,
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0x17, 0x16, 0x15, 0x14, 0x13, 0x12, 0x11, 0x10,
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0x1f, 0x1e, 0x1d, 0x1c, 0x1b, 0x1a, 0x19, 0x18,
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0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0x21, 0x20,
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0x2f, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x28,
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0x37, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, 0x30,
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0x3f, 0x3e, 0x3d, 0x3c, 0x3b, 0x3a, 0x39, 0x38,
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0x47, 0x46, 0x45, 0x44, 0x43, 0x42, 0x41, 0x40,
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0x4f, 0x4e, 0x4d, 0x4c, 0x4b, 0x4a, 0x49, 0x48,
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0x57, 0x56, 0x55, 0x54, 0x53, 0x52, 0x51, 0x50,
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0x5f, 0x5e, 0x5d, 0x5c, 0x5b, 0x5a, 0x59, 0x58,
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0x67, 0x66, 0x65, 0x64, 0x63, 0x62, 0x61, 0x60,
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0x6f, 0x6e, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x68,
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0x77, 0x76, 0x75, 0x74, 0x73, 0x72, 0x71, 0x70,
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0x7f, 0x7e, 0x7d, 0x7c, 0x7b, 0x7a, 0x79, 0x78,
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0x87, 0x86, 0x85, 0x84, 0x83, 0x82, 0x81, 0x80,
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0x8f, 0x8e, 0x8d, 0x8c, 0x8b, 0x8a, 0x89, 0x88,
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0x97, 0x96, 0x95, 0x94, 0x93, 0x92, 0x91, 0x90,
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0x9f, 0x9e, 0x9d, 0x9c, 0x9b, 0x9a, 0x99, 0x98,
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0xa7, 0xa6, 0xa5, 0xa4, 0xa3, 0xa2, 0xa1, 0xa0,
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0xaf, 0xae, 0xad, 0xac, 0xab, 0xaa, 0xa9, 0xa8,
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0xb7, 0xb6, 0xb5, 0xb4, 0xb3, 0xb2, 0xb1, 0xb0,
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0xbf, 0xbe, 0xbd, 0xbc, 0xbb, 0xba, 0xb9, 0xb8,
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0xc7, 0xc6, 0xc5, 0xc4, 0xc3, 0xc2, 0xc1, 0xc0,
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0xcf, 0xce, 0xcd, 0xcc, 0xcb, 0xca, 0xc9, 0xc8,
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0xd7, 0xd6, 0xd5, 0xd4, 0xd3, 0xd2, 0xd1, 0xd0,
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0xdf, 0xde, 0xdd, 0xdc, 0xdb, 0xda, 0xd9, 0xd8,
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0xe7, 0xe6, 0xe5, 0xe4, 0xe3, 0xe2, 0xe1, 0xe0,
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0xef, 0xee, 0xed, 0xec, 0xeb, 0xea, 0xe9, 0xe8,
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0xf7, 0xf6, 0xf5, 0xf4, 0xf3, 0xf2, 0xf1, 0xf0,
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0xff, 0xfe, 0xfd, 0xfc, 0xfb, 0xfa, 0xf9, 0xf8,
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)))
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ciphertext = bytes(bytearray((
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0x4b, 0x8c, 0x4c, 0x98, 0x15, 0xf2, 0x4a, 0xea,
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0x1e, 0xc3, 0x57, 0x09, 0xb3, 0xbc, 0x2e, 0xd1,
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0xe0, 0xd1, 0xf2, 0x22, 0x65, 0x2d, 0x59, 0x18,
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0xf7, 0xdf, 0xfc, 0x80, 0x4b, 0xde, 0x5c, 0x68,
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0x46, 0x53, 0x75, 0x53, 0xa7, 0x46, 0x0d, 0xec,
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0x05, 0x1f, 0x1b, 0xd3, 0x0a, 0x63, 0x1a, 0xb7,
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0x78, 0xc4, 0x43, 0xe0, 0x5d, 0x3e, 0xa4, 0x0e,
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0x2d, 0x7e, 0x23, 0xa9, 0x1b, 0xc9, 0x02, 0xbc,
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0x21, 0x0c, 0x84, 0xcb, 0x0d, 0x0a, 0x07, 0xc8,
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0x7b, 0xd0, 0xfb, 0xb5, 0x1a, 0x14, 0x04, 0x5c,
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0xa2, 0x53, 0x97, 0x71, 0x2e, 0x5c, 0xc2, 0x8f,
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0x39, 0x3f, 0x6f, 0x52, 0xf2, 0x30, 0x26, 0x4e,
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0x8c, 0xe0, 0xd1, 0x01, 0x75, 0x6d, 0xdc, 0xd3,
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0x03, 0x79, 0x1e, 0xca, 0xd5, 0xc1, 0x0e, 0x12,
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0x53, 0x0a, 0x78, 0xe2, 0x0a, 0xb1, 0x1c, 0xea,
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0x3a, 0xf8, 0x55, 0xb9, 0x7c, 0xe1, 0x0b, 0xba,
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0xa0, 0xc8, 0x96, 0xeb, 0x50, 0x5a, 0xd3, 0x60,
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0x43, 0xa3, 0x0f, 0x98, 0xdb, 0xd9, 0x50, 0x6d,
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0x63, 0x91, 0xaf, 0x01, 0x40, 0xe9, 0x75, 0x5a,
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0x46, 0x5c, 0x1f, 0x19, 0x4a, 0x0b, 0x89, 0x9b,
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0xc4, 0xf6, 0xf8, 0xf5, 0x2f, 0x87, 0x3f, 0xfa,
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0x26, 0xd4, 0xf8, 0x25, 0xba, 0x1f, 0x98, 0x82,
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0xfc, 0x26, 0xaf, 0x2d, 0xc0, 0xf9, 0xc4, 0x58,
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0x49, 0xfa, 0x09, 0x80, 0x02, 0x62, 0xa4, 0x34,
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0x2d, 0xcb, 0x5a, 0x6b, 0xab, 0x61, 0x5d, 0x08,
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0xd4, 0x26, 0xe0, 0x08, 0x13, 0xd6, 0x2e, 0x02,
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0x2a, 0x37, 0xe8, 0xd0, 0xcf, 0x36, 0xf1, 0xc7,
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0xc0, 0x3f, 0x9b, 0x21, 0x60, 0xbd, 0x29, 0x2d,
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0x2e, 0x01, 0x48, 0x4e, 0xf8, 0x8f, 0x20, 0x16,
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0x8a, 0xbf, 0x82, 0xdc, 0x32, 0x7a, 0xa3, 0x18,
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0x69, 0xd1, 0x50, 0x59, 0x31, 0x91, 0xf2, 0x6c,
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0x5a, 0x5f, 0xca, 0x58, 0x9a, 0xb2, 0x2d, 0xb2,
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)))
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encrypted = ecb_encrypt(key, plaintext, sbox=sbox)
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self.assertSequenceEqual(encrypted, ciphertext)
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decrypted = ecb_decrypt(key, encrypted, sbox=sbox)
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self.assertSequenceEqual(decrypted, plaintext)
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def test_cryptopp(self):
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"""Test vectors from Crypto++ 5.6.2
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"""
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sbox = "AppliedCryptography"
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data = (
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(b"BE5EC2006CFF9DCF52354959F1FF0CBFE95061B5A648C10387069C25997C0672", b"0DF82802B741A292", b"07F9027DF7F7DF89"),
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(b"B385272AC8D72A5A8B344BC80363AC4D09BF58F41F540624CBCB8FDCF55307D7", b"1354EE9C0A11CD4C", b"4FB50536F960A7B1"),
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(b"AEE02F609A35660E4097E546FD3026B032CD107C7D459977ADF489BEF2652262", b"6693D492C4B0CC39", b"670034AC0FA811B5"),
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(b"320E9D8422165D58911DFC7D8BBB1F81B0ECD924023BF94D9DF7DCF7801240E0", b"99E2D13080928D79", b"8118FF9D3B3CFE7D"),
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(b"C9F703BBBFC63691BFA3B7B87EA8FD5E8E8EF384EF733F1A61AEF68C8FFA265F", b"D1E787749C72814C", b"A083826A790D3E0C"),
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(b"728FEE32F04B4C654AD7F607D71C660C2C2670D7C999713233149A1C0C17A1F0", b"D4C05323A4F7A7B5", b"4D1F2E6B0D9DE2CE"),
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(b"35FC96402209500FCFDEF5352D1ABB038FE33FC0D9D58512E56370B22BAA133B", b"8742D9A05F6A3AF6", b"2F3BB84879D11E52"),
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(b"D416F630BE65B7FE150656183370E07018234EE5DA3D89C4CE9152A03E5BFB77", b"F86506DA04E41CB8", b"96F0A5C77A04F5CE"),
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)
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for key, pt, ct in data:
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key = hexdec(key)
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pt = hexdec(pt)
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ct = hexdec(ct)
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self.assertSequenceEqual(ecb_encrypt(key, pt, sbox=sbox), ct)
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def test_cryptomanager(self):
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"""Test vector from http://cryptomanager.com/tv.html
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"""
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sbox = "id-GostR3411-94-TestParamSet"
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key = hexdec(b"75713134B60FEC45A607BB83AA3746AF4FF99DA6D1B53B5B1B402A1BAA030D1B")
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self.assertSequenceEqual(
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ecb_encrypt(key, hexdec(b"1122334455667788"), sbox=sbox),
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hexdec(b"03251E14F9D28ACB"),
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)
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class CFBTest(TestCase):
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def test_cryptomanager(self):
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"""Test vector from http://cryptomanager.com/tv.html
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"""
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key = hexdec(b"75713134B60FEC45A607BB83AA3746AF4FF99DA6D1B53B5B1B402A1BAA030D1B")
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sbox = "id-GostR3411-94-TestParamSet"
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self.assertSequenceEqual(
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cfb_encrypt(
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key,
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hexdec(b"112233445566778899AABBCCDD800000"),
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iv=hexdec(b"0102030405060708"),
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sbox=sbox,
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),
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hexdec(b"6EE84586DD2BCA0CAD3616940E164242"),
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)
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self.assertSequenceEqual(
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cfb_decrypt(
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key,
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hexdec(b"6EE84586DD2BCA0CAD3616940E164242"),
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iv=hexdec(b"0102030405060708"),
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sbox=sbox,
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),
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hexdec(b"112233445566778899AABBCCDD800000"),
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)
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def test_steps(self):
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"""Check step-by-step operation manually
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"""
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key = urandom(KEYSIZE)
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iv = urandom(BLOCKSIZE)
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plaintext = urandom(20)
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ciphertext = cfb_encrypt(key, plaintext, iv)
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# First full block
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step = encrypt(DEFAULT_SBOX, key, block2ns(iv))
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step = strxor(plaintext[:8], ns2block(step))
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self.assertSequenceEqual(step, ciphertext[:8])
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# Second full block
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step = encrypt(DEFAULT_SBOX, key, block2ns(step))
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step = strxor(plaintext[8:16], ns2block(step))
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self.assertSequenceEqual(step, ciphertext[8:16])
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# Third non-full block
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step = encrypt(DEFAULT_SBOX, key, block2ns(step))
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step = strxor(plaintext[16:] + 4 * b"\x00", ns2block(step))
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self.assertSequenceEqual(step[:4], ciphertext[16:])
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def test_random(self):
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"""Random data with various sizes
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"""
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key = urandom(KEYSIZE)
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iv = urandom(BLOCKSIZE)
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for size in (5, 8, 16, 120):
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pt = urandom(size)
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self.assertSequenceEqual(
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cfb_decrypt(key, cfb_encrypt(key, pt, iv), iv),
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pt,
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)
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class CTRTest(TestCase):
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def test_gcl(self):
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"""Test vectors from libgcl3
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"""
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sbox = "id-Gost28147-89-TestParamSet"
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key = hexdec(b"0475f6e05038fbfad2c7c390edb3ca3d1547124291ae1e8a2f79cd9ed2bcefbd")
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plaintext = bytes(bytearray((
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0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00,
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0x0f, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0x08,
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0x17, 0x16, 0x15, 0x14, 0x13, 0x12, 0x11, 0x10,
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0x1f, 0x1e, 0x1d, 0x1c, 0x1b, 0x1a, 0x19, 0x18,
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0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0x21, 0x20,
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0x2f, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x28,
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0x37, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, 0x30,
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0x3f, 0x3e, 0x3d, 0x3c, 0x3b, 0x3a, 0x39, 0x38,
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0x47, 0x46, 0x45, 0x44, 0x43, 0x42, 0x41, 0x40,
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0x4f, 0x4e, 0x4d, 0x4c, 0x4b, 0x4a, 0x49, 0x48,
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0x57, 0x56, 0x55, 0x54, 0x53, 0x52, 0x51, 0x50,
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0x5f, 0x5e, 0x5d, 0x5c, 0x5b, 0x5a, 0x59, 0x58,
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0x67, 0x66, 0x65, 0x64, 0x63, 0x62, 0x61, 0x60,
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0x6f, 0x6e, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x68,
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0x77, 0x76, 0x75, 0x74, 0x73, 0x72, 0x71, 0x70,
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0x7f, 0x7e, 0x7d, 0x7c, 0x7b, 0x7a, 0x79, 0x78,
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0x87, 0x86, 0x85, 0x84, 0x83, 0x82, 0x81, 0x80,
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0x8f, 0x8e, 0x8d, 0x8c, 0x8b, 0x8a, 0x89, 0x88,
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0x97, 0x96, 0x95, 0x94, 0x93, 0x92, 0x91, 0x90,
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0x9f, 0x9e, 0x9d, 0x9c, 0x9b, 0x9a, 0x99, 0x98,
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0xa7, 0xa6, 0xa5, 0xa4, 0xa3, 0xa2, 0xa1, 0xa0,
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0xaf, 0xae, 0xad, 0xac, 0xab, 0xaa, 0xa9, 0xa8,
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0xb7, 0xb6, 0xb5, 0xb4, 0xb3, 0xb2, 0xb1, 0xb0,
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0xbf, 0xbe, 0xbd, 0xbc, 0xbb, 0xba, 0xb9, 0xb8,
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0xc7, 0xc6, 0xc5, 0xc4, 0xc3, 0xc2, 0xc1, 0xc0,
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0xcf, 0xce, 0xcd, 0xcc, 0xcb, 0xca, 0xc9, 0xc8,
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0xd7, 0xd6, 0xd5, 0xd4, 0xd3, 0xd2, 0xd1, 0xd0,
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0xdf, 0xde, 0xdd, 0xdc, 0xdb, 0xda, 0xd9, 0xd8,
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0xe7, 0xe6, 0xe5, 0xe4, 0xe3, 0xe2, 0xe1, 0xe0,
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0xef, 0xee, 0xed, 0xec, 0xeb, 0xea, 0xe9, 0xe8,
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0xf7, 0xf6, 0xf5, 0xf4, 0xf3, 0xf2, 0xf1, 0xf0,
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0xff, 0xfe, 0xfd, 0xfc, 0xfb,
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)))
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ciphertext = bytes(bytearray((
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0x4a, 0x5e, 0x37, 0x6c, 0xa1, 0x12, 0xd3, 0x55,
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0x09, 0x13, 0x1a, 0x21, 0xac, 0xfb, 0xb2, 0x1e,
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0x8c, 0x24, 0x9b, 0x57, 0x20, 0x68, 0x46, 0xd5,
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0x23, 0x2a, 0x26, 0x35, 0x12, 0x56, 0x5c, 0x69,
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0x2a, 0x2f, 0xd1, 0xab, 0xbd, 0x45, 0xdc, 0x3a,
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0x1a, 0xa4, 0x57, 0x64, 0xd5, 0xe4, 0x69, 0x6d,
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0xb4, 0x8b, 0xf1, 0x54, 0x78, 0x3b, 0x10, 0x8f,
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0x7a, 0x4b, 0x32, 0xe0, 0xe8, 0x4c, 0xbf, 0x03,
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0x24, 0x37, 0x95, 0x6a, 0x55, 0xa8, 0xce, 0x6f,
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0x95, 0x62, 0x12, 0xf6, 0x79, 0xe6, 0xf0, 0x1b,
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0x86, 0xef, 0x36, 0x36, 0x05, 0xd8, 0x6f, 0x10,
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0xa1, 0x41, 0x05, 0x07, 0xf8, 0xfa, 0xa4, 0x0b,
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0x17, 0x2c, 0x71, 0xbc, 0x8b, 0xcb, 0xcf, 0x3d,
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0x74, 0x18, 0x32, 0x0b, 0x1c, 0xd2, 0x9e, 0x75,
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0xba, 0x3e, 0x61, 0xe1, 0x61, 0x96, 0xd0, 0xee,
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0x8f, 0xf2, 0x9a, 0x5e, 0xb7, 0x7a, 0x15, 0xaa,
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0x4e, 0x1e, 0x77, 0x7c, 0x99, 0xe1, 0x41, 0x13,
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0xf4, 0x60, 0x39, 0x46, 0x4c, 0x35, 0xde, 0x95,
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0xcc, 0x4f, 0xd5, 0xaf, 0xd1, 0x4d, 0x84, 0x1a,
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0x45, 0xc7, 0x2a, 0xf2, 0x2c, 0xc0, 0xb7, 0x94,
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0xa3, 0x08, 0xb9, 0x12, 0x96, 0xb5, 0x97, 0x99,
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0x3a, 0xb7, 0x0c, 0x14, 0x56, 0xb9, 0xcb, 0x49,
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0x44, 0xa9, 0x93, 0xa9, 0xfb, 0x19, 0x10, 0x8c,
|
|
0x6a, 0x68, 0xe8, 0x7b, 0x06, 0x57, 0xf0, 0xef,
|
|
0x88, 0x44, 0xa6, 0xd2, 0x98, 0xbe, 0xd4, 0x07,
|
|
0x41, 0x37, 0x45, 0xa6, 0x71, 0x36, 0x76, 0x69,
|
|
0x4b, 0x75, 0x15, 0x33, 0x90, 0x29, 0x6e, 0x33,
|
|
0xcb, 0x96, 0x39, 0x78, 0x19, 0x2e, 0x96, 0xf3,
|
|
0x49, 0x4c, 0x89, 0x3d, 0xa1, 0x86, 0x82, 0x00,
|
|
0xce, 0xbd, 0x54, 0x29, 0x65, 0x00, 0x1d, 0x16,
|
|
0x13, 0xc3, 0xfe, 0x1f, 0x8c, 0x55, 0x63, 0x09,
|
|
0x1f, 0xcd, 0xd4, 0x28, 0xca,
|
|
)))
|
|
iv = b"\x02\x01\x01\x01\x01\x01\x01\x01"
|
|
encrypted = cnt(key, plaintext, iv=iv, sbox=sbox)
|
|
self.assertSequenceEqual(encrypted, ciphertext)
|
|
decrypted = cnt(key, encrypted, iv=iv, sbox=sbox)
|
|
self.assertSequenceEqual(decrypted, plaintext)
|
|
|
|
def test_gcl2(self):
|
|
"""Test vectors 2 from libgcl3
|
|
"""
|
|
sbox = "id-Gost28147-89-TestParamSet"
|
|
key = hexdec(b"fc7ad2886f455b50d29008fa622b57d5c65b3c637202025799cadf0768519e8a")
|
|
plaintext = bytes(bytearray((
|
|
0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00,
|
|
0x0f, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0x08,
|
|
0x17, 0x16, 0x15, 0x14, 0x13, 0x12, 0x11, 0x10,
|
|
0x1f, 0x1e, 0x1d, 0x1c, 0x1b, 0x1a, 0x19, 0x18,
|
|
0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0x21, 0x20,
|
|
0x2f, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x28,
|
|
0xff, 0xfe, 0xfd, 0xfc, 0xfb,
|
|
)))
|
|
ciphertext = bytes(bytearray((
|
|
0xd0, 0xbe, 0x60, 0x1a, 0x2c, 0xf1, 0x90, 0x26,
|
|
0x9b, 0x7b, 0x23, 0xb4, 0xd2, 0xcc, 0xe1, 0x15,
|
|
0xf6, 0x05, 0x57, 0x28, 0x88, 0x75, 0xeb, 0x1e,
|
|
0xd3, 0x62, 0xdc, 0xda, 0x9b, 0x62, 0xee, 0x9a,
|
|
0x57, 0x87, 0x8a, 0xf1, 0x82, 0x37, 0x9c, 0x7f,
|
|
0x13, 0xcc, 0x55, 0x38, 0xb5, 0x63, 0x32, 0xc5,
|
|
0x23, 0xa4, 0xcb, 0x7d, 0x51,
|
|
)))
|
|
iv = BLOCKSIZE * b"\x00"
|
|
encrypted = cnt(key, plaintext, iv=iv, sbox=sbox)
|
|
self.assertSequenceEqual(encrypted, ciphertext)
|
|
decrypted = cnt(key, encrypted, iv=iv, sbox=sbox)
|
|
self.assertSequenceEqual(decrypted, plaintext)
|
|
|
|
|
|
class CBCTest(TestCase):
|
|
def test_pad_requirement(self):
|
|
key = KEYSIZE * b"x"
|
|
for s in (b"", b"foo", b"foobarbaz"):
|
|
with self.assertRaises(ValueError):
|
|
cbc_encrypt(key, s, pad=False)
|
|
with self.assertRaises(ValueError):
|
|
cbc_decrypt(key, s, pad=False)
|
|
|
|
def test_passes(self):
|
|
iv = urandom(BLOCKSIZE)
|
|
key = KEYSIZE * b"x"
|
|
for pt in (b"foo", b"foobarba", b"foobarbaz", 16 * b"x"):
|
|
ct = cbc_encrypt(key, pt, iv)
|
|
dt = cbc_decrypt(key, ct)
|
|
self.assertSequenceEqual(pt, dt)
|
|
|
|
def test_iv_existence_check(self):
|
|
key = KEYSIZE * b"x"
|
|
with self.assertRaises(ValueError):
|
|
cbc_decrypt(key, BLOCKSIZE * b"x")
|
|
iv = urandom(BLOCKSIZE)
|
|
cbc_decrypt(key, cbc_encrypt(key, BLOCKSIZE * b"x", iv))
|
|
|
|
def test_meshing(self):
|
|
pt = urandom(MESH_MAX_DATA * 3)
|
|
key = urandom(KEYSIZE)
|
|
ct = cbc_encrypt(key, pt)
|
|
dt = cbc_decrypt(key, ct)
|
|
self.assertSequenceEqual(pt, dt)
|
|
|
|
|
|
class CFBMeshingTest(TestCase):
|
|
def setUp(self):
|
|
self.key = urandom(KEYSIZE)
|
|
self.iv = urandom(BLOCKSIZE)
|
|
|
|
def test_single(self):
|
|
pt = b"\x00"
|
|
ct = cfb_encrypt(self.key, pt, mesh=True)
|
|
dec = cfb_decrypt(self.key, ct, mesh=True)
|
|
self.assertSequenceEqual(pt, dec)
|
|
|
|
def test_short(self):
|
|
pt = urandom(MESH_MAX_DATA - 1)
|
|
ct = cfb_encrypt(self.key, pt, mesh=True)
|
|
dec = cfb_decrypt(self.key, ct, mesh=True)
|
|
dec_plain = cfb_decrypt(self.key, ct)
|
|
self.assertSequenceEqual(pt, dec)
|
|
self.assertSequenceEqual(pt, dec_plain)
|
|
|
|
def test_short_iv(self):
|
|
pt = urandom(MESH_MAX_DATA - 1)
|
|
ct = cfb_encrypt(self.key, pt, iv=self.iv, mesh=True)
|
|
dec = cfb_decrypt(self.key, ct, iv=self.iv, mesh=True)
|
|
dec_plain = cfb_decrypt(self.key, ct, iv=self.iv)
|
|
self.assertSequenceEqual(pt, dec)
|
|
self.assertSequenceEqual(pt, dec_plain)
|
|
|
|
def test_longer_iv(self):
|
|
pt = urandom(MESH_MAX_DATA * 3)
|
|
ct = cfb_encrypt(self.key, pt, iv=self.iv, mesh=True)
|
|
dec = cfb_decrypt(self.key, ct, iv=self.iv, mesh=True)
|
|
dec_plain = cfb_decrypt(self.key, ct, iv=self.iv)
|
|
self.assertSequenceEqual(pt, dec)
|
|
self.assertNotEqual(pt, dec_plain)
|