diff options
Diffstat (limited to 'lib/Crypto/SelfTest/Cipher/test_OFB.py')
| -rw-r--r-- | lib/Crypto/SelfTest/Cipher/test_OFB.py | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/lib/Crypto/SelfTest/Cipher/test_OFB.py b/lib/Crypto/SelfTest/Cipher/test_OFB.py new file mode 100644 index 0000000..ec145ad --- /dev/null +++ b/lib/Crypto/SelfTest/Cipher/test_OFB.py @@ -0,0 +1,238 @@ +# =================================================================== +# +# 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') |