Edit File: test_OFB.py
# =================================================================== # # Copyright (c) 2015, Legrandin <helderijs@gmail.com> # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in # the documentation and/or other materials provided with the # distribution. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE # COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE # POSSIBILITY OF SUCH DAMAGE. # =================================================================== import unittest from binascii import unhexlify from Crypto.SelfTest.st_common import list_test_cases from Crypto.Util.py3compat import tobytes from Crypto.Cipher import AES, DES3, DES from Crypto.Hash import SHAKE128 from Crypto.SelfTest.loader import load_test_vectors_wycheproof def get_tag_random(tag, length): return SHAKE128.new(data=tobytes(tag)).read(length) from Crypto.SelfTest.Cipher.test_CBC import BlockChainingTests class OfbTests(BlockChainingTests): aes_mode = AES.MODE_OFB des3_mode = DES3.MODE_OFB # Redefine test_unaligned_data_128/64 def test_unaligned_data_128(self): plaintexts = [ b"7777777" ] * 100 cipher = AES.new(self.key_128, AES.MODE_CFB, self.iv_128, segment_size=8) ciphertexts = [ cipher.encrypt(x) for x in plaintexts ] cipher = AES.new(self.key_128, AES.MODE_CFB, self.iv_128, segment_size=8) self.assertEqual(b"".join(ciphertexts), cipher.encrypt(b"".join(plaintexts))) cipher = AES.new(self.key_128, AES.MODE_CFB, self.iv_128, segment_size=128) ciphertexts = [ cipher.encrypt(x) for x in plaintexts ] cipher = AES.new(self.key_128, AES.MODE_CFB, self.iv_128, segment_size=128) self.assertEqual(b"".join(ciphertexts), cipher.encrypt(b"".join(plaintexts))) def test_unaligned_data_64(self): plaintexts = [ b"7777777" ] * 100 cipher = DES3.new(self.key_192, DES3.MODE_CFB, self.iv_64, segment_size=8) ciphertexts = [ cipher.encrypt(x) for x in plaintexts ] cipher = DES3.new(self.key_192, DES3.MODE_CFB, self.iv_64, segment_size=8) self.assertEqual(b"".join(ciphertexts), cipher.encrypt(b"".join(plaintexts))) cipher = DES3.new(self.key_192, DES3.MODE_CFB, self.iv_64, segment_size=64) ciphertexts = [ cipher.encrypt(x) for x in plaintexts ] cipher = DES3.new(self.key_192, DES3.MODE_CFB, self.iv_64, segment_size=64) self.assertEqual(b"".join(ciphertexts), cipher.encrypt(b"".join(plaintexts))) from Crypto.SelfTest.Cipher.test_CBC import NistBlockChainingVectors class NistOfbVectors(NistBlockChainingVectors): aes_mode = AES.MODE_OFB des_mode = DES.MODE_OFB des3_mode = DES3.MODE_OFB # Create one test method per file nist_aes_kat_mmt_files = ( # KAT "OFBGFSbox128.rsp", "OFBGFSbox192.rsp", "OFBGFSbox256.rsp", "OFBKeySbox128.rsp", "OFBKeySbox192.rsp", "OFBKeySbox256.rsp", "OFBVarKey128.rsp", "OFBVarKey192.rsp", "OFBVarKey256.rsp", "OFBVarTxt128.rsp", "OFBVarTxt192.rsp", "OFBVarTxt256.rsp", # MMT "OFBMMT128.rsp", "OFBMMT192.rsp", "OFBMMT256.rsp", ) nist_aes_mct_files = ( "OFBMCT128.rsp", "OFBMCT192.rsp", "OFBMCT256.rsp", ) for file_name in nist_aes_kat_mmt_files: def new_func(self, file_name=file_name): self._do_kat_aes_test(file_name) setattr(NistOfbVectors, "test_AES_" + file_name, new_func) for file_name in nist_aes_mct_files: def new_func(self, file_name=file_name): self._do_mct_aes_test(file_name) setattr(NistOfbVectors, "test_AES_" + file_name, new_func) del file_name, new_func nist_tdes_files = ( "TOFBMMT2.rsp", # 2TDES "TOFBMMT3.rsp", # 3TDES "TOFBinvperm.rsp", # Single DES "TOFBpermop.rsp", "TOFBsubtab.rsp", "TOFBvarkey.rsp", "TOFBvartext.rsp", ) for file_name in nist_tdes_files: def new_func(self, file_name=file_name): self._do_tdes_test(file_name) setattr(NistOfbVectors, "test_TDES_" + file_name, new_func) # END OF NIST OFB TEST VECTORS class SP800TestVectors(unittest.TestCase): """Class exercising the OFB test vectors found in Section F.4 of NIST SP 800-3A""" def test_aes_128(self): plaintext = '6bc1bee22e409f96e93d7e117393172a' +\ 'ae2d8a571e03ac9c9eb76fac45af8e51' +\ '30c81c46a35ce411e5fbc1191a0a52ef' +\ 'f69f2445df4f9b17ad2b417be66c3710' ciphertext = '3b3fd92eb72dad20333449f8e83cfb4a' +\ '7789508d16918f03f53c52dac54ed825' +\ '9740051e9c5fecf64344f7a82260edcc' +\ '304c6528f659c77866a510d9c1d6ae5e' key = '2b7e151628aed2a6abf7158809cf4f3c' iv = '000102030405060708090a0b0c0d0e0f' key = unhexlify(key) iv = unhexlify(iv) plaintext = unhexlify(plaintext) ciphertext = unhexlify(ciphertext) cipher = AES.new(key, AES.MODE_OFB, iv) self.assertEqual(cipher.encrypt(plaintext), ciphertext) cipher = AES.new(key, AES.MODE_OFB, iv) self.assertEqual(cipher.decrypt(ciphertext), plaintext) cipher = AES.new(key, AES.MODE_OFB, iv) self.assertEqual(cipher.encrypt(plaintext[:-8]), ciphertext[:-8]) cipher = AES.new(key, AES.MODE_OFB, iv) self.assertEqual(cipher.decrypt(ciphertext[:-8]), plaintext[:-8]) def test_aes_192(self): plaintext = '6bc1bee22e409f96e93d7e117393172a' +\ 'ae2d8a571e03ac9c9eb76fac45af8e51' +\ '30c81c46a35ce411e5fbc1191a0a52ef' +\ 'f69f2445df4f9b17ad2b417be66c3710' ciphertext = 'cdc80d6fddf18cab34c25909c99a4174' +\ 'fcc28b8d4c63837c09e81700c1100401' +\ '8d9a9aeac0f6596f559c6d4daf59a5f2' +\ '6d9f200857ca6c3e9cac524bd9acc92a' key = '8e73b0f7da0e6452c810f32b809079e562f8ead2522c6b7b' iv = '000102030405060708090a0b0c0d0e0f' key = unhexlify(key) iv = unhexlify(iv) plaintext = unhexlify(plaintext) ciphertext = unhexlify(ciphertext) cipher = AES.new(key, AES.MODE_OFB, iv) self.assertEqual(cipher.encrypt(plaintext), ciphertext) cipher = AES.new(key, AES.MODE_OFB, iv) self.assertEqual(cipher.decrypt(ciphertext), plaintext) cipher = AES.new(key, AES.MODE_OFB, iv) self.assertEqual(cipher.encrypt(plaintext[:-8]), ciphertext[:-8]) cipher = AES.new(key, AES.MODE_OFB, iv) self.assertEqual(cipher.decrypt(ciphertext[:-8]), plaintext[:-8]) def test_aes_256(self): plaintext = '6bc1bee22e409f96e93d7e117393172a' +\ 'ae2d8a571e03ac9c9eb76fac45af8e51' +\ '30c81c46a35ce411e5fbc1191a0a52ef' +\ 'f69f2445df4f9b17ad2b417be66c3710' ciphertext = 'dc7e84bfda79164b7ecd8486985d3860' +\ '4febdc6740d20b3ac88f6ad82a4fb08d' +\ '71ab47a086e86eedf39d1c5bba97c408' +\ '0126141d67f37be8538f5a8be740e484' key = '603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4' iv = '000102030405060708090a0b0c0d0e0f' key = unhexlify(key) iv = unhexlify(iv) plaintext = unhexlify(plaintext) ciphertext = unhexlify(ciphertext) cipher = AES.new(key, AES.MODE_OFB, iv) self.assertEqual(cipher.encrypt(plaintext), ciphertext) cipher = AES.new(key, AES.MODE_OFB, iv) self.assertEqual(cipher.decrypt(ciphertext), plaintext) cipher = AES.new(key, AES.MODE_OFB, iv) self.assertEqual(cipher.encrypt(plaintext[:-8]), ciphertext[:-8]) cipher = AES.new(key, AES.MODE_OFB, iv) self.assertEqual(cipher.decrypt(ciphertext[:-8]), plaintext[:-8]) def get_tests(config={}): tests = [] tests += list_test_cases(OfbTests) if config.get('slow_tests'): tests += list_test_cases(NistOfbVectors) tests += list_test_cases(SP800TestVectors) return tests if __name__ == '__main__': suite = lambda: unittest.TestSuite(get_tests()) unittest.main(defaultTest='suite')