411 lines
16 KiB
Python
411 lines
16 KiB
Python
# ===================================================================
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#
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# Copyright (c) 2014, Legrandin <helderijs@gmail.com>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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# ===================================================================
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import unittest
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from binascii import unhexlify
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from Cryptodome.SelfTest.loader import load_test_vectors
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from Cryptodome.SelfTest.st_common import list_test_cases
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from Cryptodome.Util.py3compat import tobytes, is_string
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from Cryptodome.Cipher import AES, DES3, DES
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from Cryptodome.Hash import SHAKE128
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from Cryptodome.SelfTest.Cipher.test_CBC import BlockChainingTests
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def get_tag_random(tag, length):
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return SHAKE128.new(data=tobytes(tag)).read(length)
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class CfbTests(BlockChainingTests):
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aes_mode = AES.MODE_CFB
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des3_mode = DES3.MODE_CFB
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# Redefine test_unaligned_data_128/64
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def test_unaligned_data_128(self):
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plaintexts = [ b"7777777" ] * 100
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cipher = AES.new(self.key_128, AES.MODE_CFB, self.iv_128, segment_size=8)
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ciphertexts = [ cipher.encrypt(x) for x in plaintexts ]
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cipher = AES.new(self.key_128, AES.MODE_CFB, self.iv_128, segment_size=8)
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self.assertEqual(b"".join(ciphertexts), cipher.encrypt(b"".join(plaintexts)))
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cipher = AES.new(self.key_128, AES.MODE_CFB, self.iv_128, segment_size=128)
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ciphertexts = [ cipher.encrypt(x) for x in plaintexts ]
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cipher = AES.new(self.key_128, AES.MODE_CFB, self.iv_128, segment_size=128)
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self.assertEqual(b"".join(ciphertexts), cipher.encrypt(b"".join(plaintexts)))
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def test_unaligned_data_64(self):
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plaintexts = [ b"7777777" ] * 100
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cipher = DES3.new(self.key_192, DES3.MODE_CFB, self.iv_64, segment_size=8)
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ciphertexts = [ cipher.encrypt(x) for x in plaintexts ]
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cipher = DES3.new(self.key_192, DES3.MODE_CFB, self.iv_64, segment_size=8)
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self.assertEqual(b"".join(ciphertexts), cipher.encrypt(b"".join(plaintexts)))
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cipher = DES3.new(self.key_192, DES3.MODE_CFB, self.iv_64, segment_size=64)
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ciphertexts = [ cipher.encrypt(x) for x in plaintexts ]
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cipher = DES3.new(self.key_192, DES3.MODE_CFB, self.iv_64, segment_size=64)
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self.assertEqual(b"".join(ciphertexts), cipher.encrypt(b"".join(plaintexts)))
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# Extra
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def test_segment_size_128(self):
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for bits in range(8, 129, 8):
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cipher = AES.new(self.key_128, AES.MODE_CFB, self.iv_128,
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segment_size=bits)
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for bits in 0, 7, 9, 127, 129:
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self.assertRaises(ValueError, AES.new, self.key_128, AES.MODE_CFB,
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self.iv_128,
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segment_size=bits)
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def test_segment_size_64(self):
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for bits in range(8, 65, 8):
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cipher = DES3.new(self.key_192, DES3.MODE_CFB, self.iv_64,
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segment_size=bits)
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for bits in 0, 7, 9, 63, 65:
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self.assertRaises(ValueError, DES3.new, self.key_192, AES.MODE_CFB,
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self.iv_64,
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segment_size=bits)
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class NistCfbVectors(unittest.TestCase):
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def _do_kat_aes_test(self, file_name, segment_size):
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test_vectors = load_test_vectors(("Cipher", "AES"),
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file_name,
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"AES CFB%d KAT" % segment_size,
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{ "count" : lambda x: int(x) } )
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if test_vectors is None:
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return
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direction = None
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for tv in test_vectors:
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# The test vector file contains some directive lines
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if is_string(tv):
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direction = tv
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continue
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self.description = tv.desc
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cipher = AES.new(tv.key, AES.MODE_CFB, tv.iv,
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segment_size=segment_size)
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if direction == "[ENCRYPT]":
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self.assertEqual(cipher.encrypt(tv.plaintext), tv.ciphertext)
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elif direction == "[DECRYPT]":
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self.assertEqual(cipher.decrypt(tv.ciphertext), tv.plaintext)
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else:
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assert False
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# See Section 6.4.5 in AESAVS
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def _do_mct_aes_test(self, file_name, segment_size):
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test_vectors = load_test_vectors(("Cipher", "AES"),
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file_name,
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"AES CFB%d Montecarlo" % segment_size,
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{ "count" : lambda x: int(x) } )
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if test_vectors is None:
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return
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assert(segment_size in (8, 128))
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direction = None
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for tv in test_vectors:
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# The test vector file contains some directive lines
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if is_string(tv):
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direction = tv
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continue
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self.description = tv.desc
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cipher = AES.new(tv.key, AES.MODE_CFB, tv.iv,
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segment_size=segment_size)
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def get_input(input_text, output_seq, j):
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# CFB128
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if segment_size == 128:
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if j >= 2:
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return output_seq[-2]
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return [input_text, tv.iv][j]
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# CFB8
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if j == 0:
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return input_text
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elif j <= 16:
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return tv.iv[j - 1:j]
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return output_seq[j - 17]
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if direction == '[ENCRYPT]':
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cts = []
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for j in range(1000):
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plaintext = get_input(tv.plaintext, cts, j)
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cts.append(cipher.encrypt(plaintext))
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self.assertEqual(cts[-1], tv.ciphertext)
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elif direction == '[DECRYPT]':
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pts = []
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for j in range(1000):
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ciphertext = get_input(tv.ciphertext, pts, j)
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pts.append(cipher.decrypt(ciphertext))
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self.assertEqual(pts[-1], tv.plaintext)
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else:
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assert False
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def _do_tdes_test(self, file_name, segment_size):
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test_vectors = load_test_vectors(("Cipher", "TDES"),
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file_name,
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"TDES CFB%d KAT" % segment_size,
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{ "count" : lambda x: int(x) } )
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if test_vectors is None:
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return
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direction = None
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for tv in test_vectors:
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# The test vector file contains some directive lines
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if is_string(tv):
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direction = tv
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continue
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self.description = tv.desc
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if hasattr(tv, "keys"):
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cipher = DES.new(tv.keys, DES.MODE_CFB, tv.iv,
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segment_size=segment_size)
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else:
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if tv.key1 != tv.key3:
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key = tv.key1 + tv.key2 + tv.key3 # Option 3
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else:
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key = tv.key1 + tv.key2 # Option 2
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cipher = DES3.new(key, DES3.MODE_CFB, tv.iv,
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segment_size=segment_size)
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if direction == "[ENCRYPT]":
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self.assertEqual(cipher.encrypt(tv.plaintext), tv.ciphertext)
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elif direction == "[DECRYPT]":
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self.assertEqual(cipher.decrypt(tv.ciphertext), tv.plaintext)
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else:
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assert False
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# Create one test method per file
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nist_aes_kat_mmt_files = (
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# KAT
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"CFB?GFSbox128.rsp",
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"CFB?GFSbox192.rsp",
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"CFB?GFSbox256.rsp",
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"CFB?KeySbox128.rsp",
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"CFB?KeySbox192.rsp",
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"CFB?KeySbox256.rsp",
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"CFB?VarKey128.rsp",
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"CFB?VarKey192.rsp",
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"CFB?VarKey256.rsp",
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"CFB?VarTxt128.rsp",
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"CFB?VarTxt192.rsp",
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"CFB?VarTxt256.rsp",
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# MMT
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"CFB?MMT128.rsp",
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"CFB?MMT192.rsp",
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"CFB?MMT256.rsp",
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)
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nist_aes_mct_files = (
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"CFB?MCT128.rsp",
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"CFB?MCT192.rsp",
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"CFB?MCT256.rsp",
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)
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for file_gen_name in nist_aes_kat_mmt_files:
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for bits in "8", "128":
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file_name = file_gen_name.replace("?", bits)
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def new_func(self, file_name=file_name, bits=bits):
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self._do_kat_aes_test(file_name, int(bits))
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setattr(NistCfbVectors, "test_AES_" + file_name, new_func)
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for file_gen_name in nist_aes_mct_files:
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for bits in "8", "128":
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file_name = file_gen_name.replace("?", bits)
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def new_func(self, file_name=file_name, bits=bits):
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self._do_mct_aes_test(file_name, int(bits))
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setattr(NistCfbVectors, "test_AES_" + file_name, new_func)
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del file_name, new_func
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nist_tdes_files = (
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"TCFB?MMT2.rsp", # 2TDES
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"TCFB?MMT3.rsp", # 3TDES
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"TCFB?invperm.rsp", # Single DES
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"TCFB?permop.rsp",
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"TCFB?subtab.rsp",
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"TCFB?varkey.rsp",
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"TCFB?vartext.rsp",
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)
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for file_gen_name in nist_tdes_files:
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for bits in "8", "64":
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file_name = file_gen_name.replace("?", bits)
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def new_func(self, file_name=file_name, bits=bits):
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self._do_tdes_test(file_name, int(bits))
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setattr(NistCfbVectors, "test_TDES_" + file_name, new_func)
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# END OF NIST CBC TEST VECTORS
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class SP800TestVectors(unittest.TestCase):
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"""Class exercising the CFB test vectors found in Section F.3
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of NIST SP 800-3A"""
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def test_aes_128_cfb8(self):
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plaintext = '6bc1bee22e409f96e93d7e117393172aae2d'
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ciphertext = '3b79424c9c0dd436bace9e0ed4586a4f32b9'
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key = '2b7e151628aed2a6abf7158809cf4f3c'
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iv = '000102030405060708090a0b0c0d0e0f'
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key = unhexlify(key)
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iv = unhexlify(iv)
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plaintext = unhexlify(plaintext)
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ciphertext = unhexlify(ciphertext)
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cipher = AES.new(key, AES.MODE_CFB, iv, segment_size=8)
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self.assertEqual(cipher.encrypt(plaintext), ciphertext)
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cipher = AES.new(key, AES.MODE_CFB, iv, segment_size=8)
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self.assertEqual(cipher.decrypt(ciphertext), plaintext)
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def test_aes_192_cfb8(self):
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plaintext = '6bc1bee22e409f96e93d7e117393172aae2d'
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ciphertext = 'cda2521ef0a905ca44cd057cbf0d47a0678a'
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key = '8e73b0f7da0e6452c810f32b809079e562f8ead2522c6b7b'
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iv = '000102030405060708090a0b0c0d0e0f'
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key = unhexlify(key)
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iv = unhexlify(iv)
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plaintext = unhexlify(plaintext)
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ciphertext = unhexlify(ciphertext)
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cipher = AES.new(key, AES.MODE_CFB, iv, segment_size=8)
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self.assertEqual(cipher.encrypt(plaintext), ciphertext)
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cipher = AES.new(key, AES.MODE_CFB, iv, segment_size=8)
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self.assertEqual(cipher.decrypt(ciphertext), plaintext)
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def test_aes_256_cfb8(self):
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plaintext = '6bc1bee22e409f96e93d7e117393172aae2d'
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ciphertext = 'dc1f1a8520a64db55fcc8ac554844e889700'
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key = '603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4'
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iv = '000102030405060708090a0b0c0d0e0f'
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key = unhexlify(key)
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iv = unhexlify(iv)
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plaintext = unhexlify(plaintext)
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ciphertext = unhexlify(ciphertext)
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cipher = AES.new(key, AES.MODE_CFB, iv, segment_size=8)
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self.assertEqual(cipher.encrypt(plaintext), ciphertext)
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cipher = AES.new(key, AES.MODE_CFB, iv, segment_size=8)
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self.assertEqual(cipher.decrypt(ciphertext), plaintext)
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def test_aes_128_cfb128(self):
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plaintext = '6bc1bee22e409f96e93d7e117393172a' +\
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'ae2d8a571e03ac9c9eb76fac45af8e51' +\
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'30c81c46a35ce411e5fbc1191a0a52ef' +\
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'f69f2445df4f9b17ad2b417be66c3710'
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ciphertext = '3b3fd92eb72dad20333449f8e83cfb4a' +\
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'c8a64537a0b3a93fcde3cdad9f1ce58b' +\
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'26751f67a3cbb140b1808cf187a4f4df' +\
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'c04b05357c5d1c0eeac4c66f9ff7f2e6'
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key = '2b7e151628aed2a6abf7158809cf4f3c'
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iv = '000102030405060708090a0b0c0d0e0f'
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key = unhexlify(key)
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iv = unhexlify(iv)
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plaintext = unhexlify(plaintext)
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ciphertext = unhexlify(ciphertext)
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cipher = AES.new(key, AES.MODE_CFB, iv, segment_size=128)
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self.assertEqual(cipher.encrypt(plaintext), ciphertext)
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cipher = AES.new(key, AES.MODE_CFB, iv, segment_size=128)
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self.assertEqual(cipher.decrypt(ciphertext), plaintext)
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def test_aes_192_cfb128(self):
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plaintext = '6bc1bee22e409f96e93d7e117393172a' +\
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'ae2d8a571e03ac9c9eb76fac45af8e51' +\
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'30c81c46a35ce411e5fbc1191a0a52ef' +\
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'f69f2445df4f9b17ad2b417be66c3710'
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ciphertext = 'cdc80d6fddf18cab34c25909c99a4174' +\
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'67ce7f7f81173621961a2b70171d3d7a' +\
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'2e1e8a1dd59b88b1c8e60fed1efac4c9' +\
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'c05f9f9ca9834fa042ae8fba584b09ff'
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key = '8e73b0f7da0e6452c810f32b809079e562f8ead2522c6b7b'
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iv = '000102030405060708090a0b0c0d0e0f'
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key = unhexlify(key)
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iv = unhexlify(iv)
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plaintext = unhexlify(plaintext)
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ciphertext = unhexlify(ciphertext)
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cipher = AES.new(key, AES.MODE_CFB, iv, segment_size=128)
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self.assertEqual(cipher.encrypt(plaintext), ciphertext)
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cipher = AES.new(key, AES.MODE_CFB, iv, segment_size=128)
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self.assertEqual(cipher.decrypt(ciphertext), plaintext)
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def test_aes_256_cfb128(self):
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plaintext = '6bc1bee22e409f96e93d7e117393172a' +\
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'ae2d8a571e03ac9c9eb76fac45af8e51' +\
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'30c81c46a35ce411e5fbc1191a0a52ef' +\
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'f69f2445df4f9b17ad2b417be66c3710'
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ciphertext = 'dc7e84bfda79164b7ecd8486985d3860' +\
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'39ffed143b28b1c832113c6331e5407b' +\
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'df10132415e54b92a13ed0a8267ae2f9' +\
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'75a385741ab9cef82031623d55b1e471'
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key = '603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4'
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iv = '000102030405060708090a0b0c0d0e0f'
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key = unhexlify(key)
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iv = unhexlify(iv)
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plaintext = unhexlify(plaintext)
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ciphertext = unhexlify(ciphertext)
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cipher = AES.new(key, AES.MODE_CFB, iv, segment_size=128)
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self.assertEqual(cipher.encrypt(plaintext), ciphertext)
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cipher = AES.new(key, AES.MODE_CFB, iv, segment_size=128)
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self.assertEqual(cipher.decrypt(ciphertext), plaintext)
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def get_tests(config={}):
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tests = []
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tests += list_test_cases(CfbTests)
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if config.get('slow_tests'):
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tests += list_test_cases(NistCfbVectors)
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tests += list_test_cases(SP800TestVectors)
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return tests
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if __name__ == '__main__':
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suite = lambda: unittest.TestSuite(get_tests())
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unittest.main(defaultTest='suite')
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