792 lines
29 KiB
Python
792 lines
29 KiB
Python
# ===================================================================
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#
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# Copyright (c) 2015, 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 json
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import unittest
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from binascii import unhexlify
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from Crypto.SelfTest.st_common import list_test_cases
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from Crypto.Util.py3compat import tobytes, bchr, _memoryview
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from Crypto.Cipher import AES, DES3
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from Crypto.Hash import SHAKE128
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from Crypto.Util._file_system import pycryptodome_filename
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from Crypto.Util.strxor import strxor
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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 EaxTests(unittest.TestCase):
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key_128 = get_tag_random("key_128", 16)
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key_192 = get_tag_random("key_192", 16)
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nonce_96 = get_tag_random("nonce_128", 12)
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data_128 = get_tag_random("data_128", 16)
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def test_loopback_128(self):
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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pt = get_tag_random("plaintext", 16 * 100)
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ct = cipher.encrypt(pt)
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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pt2 = cipher.decrypt(ct)
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self.assertEqual(pt, pt2)
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def test_loopback_64(self):
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cipher = DES3.new(self.key_192, DES3.MODE_EAX, nonce=self.nonce_96)
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pt = get_tag_random("plaintext", 8 * 100)
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ct = cipher.encrypt(pt)
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cipher = DES3.new(self.key_192, DES3.MODE_EAX, nonce=self.nonce_96)
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pt2 = cipher.decrypt(ct)
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self.assertEqual(pt, pt2)
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def test_nonce(self):
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# If not passed, the nonce is created randomly
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cipher = AES.new(self.key_128, AES.MODE_EAX)
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nonce1 = cipher.nonce
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cipher = AES.new(self.key_128, AES.MODE_EAX)
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nonce2 = cipher.nonce
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self.assertEqual(len(nonce1), 16)
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self.assertNotEqual(nonce1, nonce2)
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cipher = AES.new(self.key_128, AES.MODE_EAX, self.nonce_96)
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ct = cipher.encrypt(self.data_128)
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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self.assertEquals(ct, cipher.encrypt(self.data_128))
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def test_nonce_must_be_bytes(self):
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self.assertRaises(TypeError, AES.new, self.key_128, AES.MODE_EAX,
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nonce=u'test12345678')
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def test_nonce_length(self):
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# nonce can be of any length (but not empty)
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self.assertRaises(ValueError, AES.new, self.key_128, AES.MODE_EAX,
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nonce=b"")
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for x in range(1, 128):
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=bchr(1) * x)
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cipher.encrypt(bchr(1))
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def test_block_size_128(self):
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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self.assertEqual(cipher.block_size, AES.block_size)
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def test_block_size_64(self):
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cipher = DES3.new(self.key_192, AES.MODE_EAX, nonce=self.nonce_96)
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self.assertEqual(cipher.block_size, DES3.block_size)
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def test_nonce_attribute(self):
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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self.assertEqual(cipher.nonce, self.nonce_96)
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# By default, a 16 bytes long nonce is randomly generated
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nonce1 = AES.new(self.key_128, AES.MODE_EAX).nonce
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nonce2 = AES.new(self.key_128, AES.MODE_EAX).nonce
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self.assertEqual(len(nonce1), 16)
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self.assertNotEqual(nonce1, nonce2)
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def test_unknown_parameters(self):
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self.assertRaises(TypeError, AES.new, self.key_128, AES.MODE_EAX,
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self.nonce_96, 7)
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self.assertRaises(TypeError, AES.new, self.key_128, AES.MODE_EAX,
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nonce=self.nonce_96, unknown=7)
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# But some are only known by the base cipher
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# (e.g. use_aesni consumed by the AES module)
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AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96,
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use_aesni=False)
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def test_null_encryption_decryption(self):
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for func in "encrypt", "decrypt":
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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result = getattr(cipher, func)(b"")
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self.assertEqual(result, b"")
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def test_either_encrypt_or_decrypt(self):
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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cipher.encrypt(b"")
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self.assertRaises(TypeError, cipher.decrypt, b"")
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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cipher.decrypt(b"")
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self.assertRaises(TypeError, cipher.encrypt, b"")
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def test_data_must_be_bytes(self):
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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self.assertRaises(TypeError, cipher.encrypt, u'test1234567890-*')
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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self.assertRaises(TypeError, cipher.decrypt, u'test1234567890-*')
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def test_mac_len(self):
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# Invalid MAC length
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self.assertRaises(ValueError, AES.new, self.key_128, AES.MODE_EAX,
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nonce=self.nonce_96, mac_len=3)
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self.assertRaises(ValueError, AES.new, self.key_128, AES.MODE_EAX,
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nonce=self.nonce_96, mac_len=16+1)
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# Valid MAC length
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for mac_len in range(5, 16 + 1):
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96,
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mac_len=mac_len)
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_, mac = cipher.encrypt_and_digest(self.data_128)
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self.assertEqual(len(mac), mac_len)
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# Default MAC length
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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_, mac = cipher.encrypt_and_digest(self.data_128)
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self.assertEqual(len(mac), 16)
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def test_invalid_mac(self):
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from Crypto.Util.strxor import strxor_c
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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ct, mac = cipher.encrypt_and_digest(self.data_128)
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invalid_mac = strxor_c(mac, 0x01)
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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self.assertRaises(ValueError, cipher.decrypt_and_verify, ct,
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invalid_mac)
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def test_hex_mac(self):
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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mac_hex = cipher.hexdigest()
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self.assertEqual(cipher.digest(), unhexlify(mac_hex))
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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cipher.hexverify(mac_hex)
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def test_message_chunks(self):
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# Validate that both associated data and plaintext/ciphertext
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# can be broken up in chunks of arbitrary length
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auth_data = get_tag_random("authenticated data", 127)
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plaintext = get_tag_random("plaintext", 127)
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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cipher.update(auth_data)
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ciphertext, ref_mac = cipher.encrypt_and_digest(plaintext)
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def break_up(data, chunk_length):
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return [data[i:i+chunk_length] for i in range(0, len(data),
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chunk_length)]
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# Encryption
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for chunk_length in 1, 2, 3, 7, 10, 13, 16, 40, 80, 128:
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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for chunk in break_up(auth_data, chunk_length):
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cipher.update(chunk)
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pt2 = b""
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for chunk in break_up(ciphertext, chunk_length):
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pt2 += cipher.decrypt(chunk)
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self.assertEqual(plaintext, pt2)
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cipher.verify(ref_mac)
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# Decryption
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for chunk_length in 1, 2, 3, 7, 10, 13, 16, 40, 80, 128:
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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for chunk in break_up(auth_data, chunk_length):
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cipher.update(chunk)
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ct2 = b""
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for chunk in break_up(plaintext, chunk_length):
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ct2 += cipher.encrypt(chunk)
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self.assertEqual(ciphertext, ct2)
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self.assertEquals(cipher.digest(), ref_mac)
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def test_bytearray(self):
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# Encrypt
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key_ba = bytearray(self.key_128)
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nonce_ba = bytearray(self.nonce_96)
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header_ba = bytearray(self.data_128)
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data_ba = bytearray(self.data_128)
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cipher1 = AES.new(self.key_128,
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AES.MODE_EAX,
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nonce=self.nonce_96)
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cipher1.update(self.data_128)
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ct = cipher1.encrypt(self.data_128)
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tag = cipher1.digest()
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cipher2 = AES.new(key_ba,
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AES.MODE_EAX,
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nonce=nonce_ba)
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key_ba[:3] = b'\xFF\xFF\xFF'
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nonce_ba[:3] = b'\xFF\xFF\xFF'
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cipher2.update(header_ba)
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header_ba[:3] = b'\xFF\xFF\xFF'
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ct_test = cipher2.encrypt(data_ba)
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data_ba[:3] = b'\x99\x99\x99'
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tag_test = cipher2.digest()
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self.assertEqual(ct, ct_test)
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self.assertEqual(tag, tag_test)
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self.assertEqual(cipher1.nonce, cipher2.nonce)
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# Decrypt
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key_ba = bytearray(self.key_128)
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nonce_ba = bytearray(self.nonce_96)
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header_ba = bytearray(self.data_128)
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ct_ba = bytearray(ct)
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tag_ba = bytearray(tag)
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del data_ba
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cipher3 = AES.new(key_ba,
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AES.MODE_EAX,
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nonce=nonce_ba)
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key_ba[:3] = b'\xFF\xFF\xFF'
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nonce_ba[:3] = b'\xFF\xFF\xFF'
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cipher3.update(header_ba)
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header_ba[:3] = b'\xFF\xFF\xFF'
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pt_test = cipher3.decrypt(ct_ba)
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ct_ba[:3] = b'\xFF\xFF\xFF'
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cipher3.verify(tag_ba)
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self.assertEqual(pt_test, self.data_128)
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def test_memoryview(self):
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# Encrypt
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key_mv = memoryview(bytearray(self.key_128))
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nonce_mv = memoryview(bytearray(self.nonce_96))
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header_mv = memoryview(bytearray(self.data_128))
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data_mv = memoryview(bytearray(self.data_128))
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cipher1 = AES.new(self.key_128,
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AES.MODE_EAX,
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nonce=self.nonce_96)
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cipher1.update(self.data_128)
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ct = cipher1.encrypt(self.data_128)
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tag = cipher1.digest()
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cipher2 = AES.new(key_mv,
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AES.MODE_EAX,
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nonce=nonce_mv)
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key_mv[:3] = b'\xFF\xFF\xFF'
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nonce_mv[:3] = b'\xFF\xFF\xFF'
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cipher2.update(header_mv)
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header_mv[:3] = b'\xFF\xFF\xFF'
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ct_test = cipher2.encrypt(data_mv)
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data_mv[:3] = b'\x99\x99\x99'
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tag_test = cipher2.digest()
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self.assertEqual(ct, ct_test)
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self.assertEqual(tag, tag_test)
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self.assertEqual(cipher1.nonce, cipher2.nonce)
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# Decrypt
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key_mv = memoryview(bytearray(self.key_128))
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nonce_mv = memoryview(bytearray(self.nonce_96))
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header_mv = memoryview(bytearray(self.data_128))
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ct_mv = memoryview(bytearray(ct))
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tag_mv = memoryview(bytearray(tag))
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del data_mv
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cipher3 = AES.new(key_mv,
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AES.MODE_EAX,
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nonce=nonce_mv)
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key_mv[:3] = b'\xFF\xFF\xFF'
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nonce_mv[:3] = b'\xFF\xFF\xFF'
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cipher3.update(header_mv)
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header_mv[:3] = b'\xFF\xFF\xFF'
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pt_test = cipher3.decrypt(ct_mv)
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ct_mv[:3] = b'\x99\x99\x99'
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cipher3.verify(tag_mv)
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self.assertEqual(pt_test, self.data_128)
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def test_output_param(self):
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pt = b'5' * 16
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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ct = cipher.encrypt(pt)
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tag = cipher.digest()
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output = bytearray(16)
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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res = cipher.encrypt(pt, output=output)
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self.assertEqual(ct, output)
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self.assertEqual(res, None)
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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res = cipher.decrypt(ct, output=output)
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self.assertEqual(pt, output)
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self.assertEqual(res, None)
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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res, tag_out = cipher.encrypt_and_digest(pt, output=output)
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self.assertEqual(ct, output)
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self.assertEqual(res, None)
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self.assertEqual(tag, tag_out)
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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res = cipher.decrypt_and_verify(ct, tag, output=output)
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self.assertEqual(pt, output)
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self.assertEqual(res, None)
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def test_output_param_memoryview(self):
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pt = b'5' * 16
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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ct = cipher.encrypt(pt)
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output = memoryview(bytearray(16))
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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cipher.encrypt(pt, output=output)
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self.assertEqual(ct, output)
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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cipher.decrypt(ct, output=output)
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self.assertEqual(pt, output)
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def test_output_param_neg(self):
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pt = b'5' * 16
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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ct = cipher.encrypt(pt)
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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self.assertRaises(TypeError, cipher.encrypt, pt, output=b'0'*16)
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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self.assertRaises(TypeError, cipher.decrypt, ct, output=b'0'*16)
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shorter_output = bytearray(15)
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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self.assertRaises(ValueError, cipher.encrypt, pt, output=shorter_output)
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cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
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self.assertRaises(ValueError, cipher.decrypt, ct, output=shorter_output)
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import sys
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if sys.version[:3] == "2.6":
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del test_memoryview
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del test_output_param_memoryview
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class EaxFSMTests(unittest.TestCase):
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key_128 = get_tag_random("key_128", 16)
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nonce_96 = get_tag_random("nonce_128", 12)
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data_128 = get_tag_random("data_128", 16)
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def test_valid_init_encrypt_decrypt_digest_verify(self):
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# No authenticated data, fixed plaintext
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# Verify path INIT->ENCRYPT->DIGEST
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cipher = AES.new(self.key_128, AES.MODE_EAX,
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nonce=self.nonce_96)
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ct = cipher.encrypt(self.data_128)
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mac = cipher.digest()
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# Verify path INIT->DECRYPT->VERIFY
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cipher = AES.new(self.key_128, AES.MODE_EAX,
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nonce=self.nonce_96)
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cipher.decrypt(ct)
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cipher.verify(mac)
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def test_valid_init_update_digest_verify(self):
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# No plaintext, fixed authenticated data
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# Verify path INIT->UPDATE->DIGEST
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cipher = AES.new(self.key_128, AES.MODE_EAX,
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nonce=self.nonce_96)
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cipher.update(self.data_128)
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mac = cipher.digest()
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# Verify path INIT->UPDATE->VERIFY
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cipher = AES.new(self.key_128, AES.MODE_EAX,
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nonce=self.nonce_96)
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cipher.update(self.data_128)
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cipher.verify(mac)
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def test_valid_full_path(self):
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# Fixed authenticated data, fixed plaintext
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# Verify path INIT->UPDATE->ENCRYPT->DIGEST
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cipher = AES.new(self.key_128, AES.MODE_EAX,
|
|
nonce=self.nonce_96)
|
|
cipher.update(self.data_128)
|
|
ct = cipher.encrypt(self.data_128)
|
|
mac = cipher.digest()
|
|
|
|
# Verify path INIT->UPDATE->DECRYPT->VERIFY
|
|
cipher = AES.new(self.key_128, AES.MODE_EAX,
|
|
nonce=self.nonce_96)
|
|
cipher.update(self.data_128)
|
|
cipher.decrypt(ct)
|
|
cipher.verify(mac)
|
|
|
|
def test_valid_init_digest(self):
|
|
# Verify path INIT->DIGEST
|
|
cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
|
|
cipher.digest()
|
|
|
|
def test_valid_init_verify(self):
|
|
# Verify path INIT->VERIFY
|
|
cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
|
|
mac = cipher.digest()
|
|
|
|
cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
|
|
cipher.verify(mac)
|
|
|
|
def test_valid_multiple_encrypt_or_decrypt(self):
|
|
for method_name in "encrypt", "decrypt":
|
|
for auth_data in (None, b"333", self.data_128,
|
|
self.data_128 + b"3"):
|
|
if auth_data is None:
|
|
assoc_len = None
|
|
else:
|
|
assoc_len = len(auth_data)
|
|
cipher = AES.new(self.key_128, AES.MODE_EAX,
|
|
nonce=self.nonce_96)
|
|
if auth_data is not None:
|
|
cipher.update(auth_data)
|
|
method = getattr(cipher, method_name)
|
|
method(self.data_128)
|
|
method(self.data_128)
|
|
method(self.data_128)
|
|
method(self.data_128)
|
|
|
|
def test_valid_multiple_digest_or_verify(self):
|
|
# Multiple calls to digest
|
|
cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
|
|
cipher.update(self.data_128)
|
|
first_mac = cipher.digest()
|
|
for x in range(4):
|
|
self.assertEqual(first_mac, cipher.digest())
|
|
|
|
# Multiple calls to verify
|
|
cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
|
|
cipher.update(self.data_128)
|
|
for x in range(5):
|
|
cipher.verify(first_mac)
|
|
|
|
def test_valid_encrypt_and_digest_decrypt_and_verify(self):
|
|
# encrypt_and_digest
|
|
cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
|
|
cipher.update(self.data_128)
|
|
ct, mac = cipher.encrypt_and_digest(self.data_128)
|
|
|
|
# decrypt_and_verify
|
|
cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
|
|
cipher.update(self.data_128)
|
|
pt = cipher.decrypt_and_verify(ct, mac)
|
|
self.assertEqual(self.data_128, pt)
|
|
|
|
def test_invalid_mixing_encrypt_decrypt(self):
|
|
# Once per method, with or without assoc. data
|
|
for method1_name, method2_name in (("encrypt", "decrypt"),
|
|
("decrypt", "encrypt")):
|
|
for assoc_data_present in (True, False):
|
|
cipher = AES.new(self.key_128, AES.MODE_EAX,
|
|
nonce=self.nonce_96)
|
|
if assoc_data_present:
|
|
cipher.update(self.data_128)
|
|
getattr(cipher, method1_name)(self.data_128)
|
|
self.assertRaises(TypeError, getattr(cipher, method2_name),
|
|
self.data_128)
|
|
|
|
def test_invalid_encrypt_or_update_after_digest(self):
|
|
for method_name in "encrypt", "update":
|
|
cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
|
|
cipher.encrypt(self.data_128)
|
|
cipher.digest()
|
|
self.assertRaises(TypeError, getattr(cipher, method_name),
|
|
self.data_128)
|
|
|
|
cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
|
|
cipher.encrypt_and_digest(self.data_128)
|
|
|
|
def test_invalid_decrypt_or_update_after_verify(self):
|
|
cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
|
|
ct = cipher.encrypt(self.data_128)
|
|
mac = cipher.digest()
|
|
|
|
for method_name in "decrypt", "update":
|
|
cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
|
|
cipher.decrypt(ct)
|
|
cipher.verify(mac)
|
|
self.assertRaises(TypeError, getattr(cipher, method_name),
|
|
self.data_128)
|
|
|
|
cipher = AES.new(self.key_128, AES.MODE_EAX, nonce=self.nonce_96)
|
|
cipher.decrypt_and_verify(ct, mac)
|
|
self.assertRaises(TypeError, getattr(cipher, method_name),
|
|
self.data_128)
|
|
|
|
|
|
class TestVectorsPaper(unittest.TestCase):
|
|
"""Class exercising the EAX test vectors found in
|
|
http://www.cs.ucdavis.edu/~rogaway/papers/eax.pdf"""
|
|
|
|
test_vectors_hex = [
|
|
( '6bfb914fd07eae6b',
|
|
'',
|
|
'',
|
|
'e037830e8389f27b025a2d6527e79d01',
|
|
'233952dee4d5ed5f9b9c6d6ff80ff478',
|
|
'62EC67F9C3A4A407FCB2A8C49031A8B3'
|
|
),
|
|
(
|
|
'fa3bfd4806eb53fa',
|
|
'f7fb',
|
|
'19dd',
|
|
'5c4c9331049d0bdab0277408f67967e5',
|
|
'91945d3f4dcbee0bf45ef52255f095a4',
|
|
'BECAF043B0A23D843194BA972C66DEBD'
|
|
),
|
|
( '234a3463c1264ac6',
|
|
'1a47cb4933',
|
|
'd851d5bae0',
|
|
'3a59f238a23e39199dc9266626c40f80',
|
|
'01f74ad64077f2e704c0f60ada3dd523',
|
|
'70C3DB4F0D26368400A10ED05D2BFF5E'
|
|
),
|
|
(
|
|
'33cce2eabff5a79d',
|
|
'481c9e39b1',
|
|
'632a9d131a',
|
|
'd4c168a4225d8e1ff755939974a7bede',
|
|
'd07cf6cbb7f313bdde66b727afd3c5e8',
|
|
'8408DFFF3C1A2B1292DC199E46B7D617'
|
|
),
|
|
(
|
|
'aeb96eaebe2970e9',
|
|
'40d0c07da5e4',
|
|
'071dfe16c675',
|
|
'cb0677e536f73afe6a14b74ee49844dd',
|
|
'35b6d0580005bbc12b0587124557d2c2',
|
|
'FDB6B06676EEDC5C61D74276E1F8E816'
|
|
),
|
|
(
|
|
'd4482d1ca78dce0f',
|
|
'4de3b35c3fc039245bd1fb7d',
|
|
'835bb4f15d743e350e728414',
|
|
'abb8644fd6ccb86947c5e10590210a4f',
|
|
'bd8e6e11475e60b268784c38c62feb22',
|
|
'6EAC5C93072D8E8513F750935E46DA1B'
|
|
),
|
|
(
|
|
'65d2017990d62528',
|
|
'8b0a79306c9ce7ed99dae4f87f8dd61636',
|
|
'02083e3979da014812f59f11d52630da30',
|
|
'137327d10649b0aa6e1c181db617d7f2',
|
|
'7c77d6e813bed5ac98baa417477a2e7d',
|
|
'1A8C98DCD73D38393B2BF1569DEEFC19'
|
|
),
|
|
(
|
|
'54b9f04e6a09189a',
|
|
'1bda122bce8a8dbaf1877d962b8592dd2d56',
|
|
'2ec47b2c4954a489afc7ba4897edcdae8cc3',
|
|
'3b60450599bd02c96382902aef7f832a',
|
|
'5fff20cafab119ca2fc73549e20f5b0d',
|
|
'DDE59B97D722156D4D9AFF2BC7559826'
|
|
),
|
|
(
|
|
'899a175897561d7e',
|
|
'6cf36720872b8513f6eab1a8a44438d5ef11',
|
|
'0de18fd0fdd91e7af19f1d8ee8733938b1e8',
|
|
'e7f6d2231618102fdb7fe55ff1991700',
|
|
'a4a4782bcffd3ec5e7ef6d8c34a56123',
|
|
'B781FCF2F75FA5A8DE97A9CA48E522EC'
|
|
),
|
|
(
|
|
'126735fcc320d25a',
|
|
'ca40d7446e545ffaed3bd12a740a659ffbbb3ceab7',
|
|
'cb8920f87a6c75cff39627b56e3ed197c552d295a7',
|
|
'cfc46afc253b4652b1af3795b124ab6e',
|
|
'8395fcf1e95bebd697bd010bc766aac3',
|
|
'22E7ADD93CFC6393C57EC0B3C17D6B44'
|
|
),
|
|
]
|
|
|
|
test_vectors = [[unhexlify(x) for x in tv] for tv in test_vectors_hex]
|
|
|
|
def runTest(self):
|
|
for assoc_data, pt, ct, mac, key, nonce in self.test_vectors:
|
|
# Encrypt
|
|
cipher = AES.new(key, AES.MODE_EAX, nonce, mac_len=len(mac))
|
|
cipher.update(assoc_data)
|
|
ct2, mac2 = cipher.encrypt_and_digest(pt)
|
|
self.assertEqual(ct, ct2)
|
|
self.assertEqual(mac, mac2)
|
|
|
|
# Decrypt
|
|
cipher = AES.new(key, AES.MODE_EAX, nonce, mac_len=len(mac))
|
|
cipher.update(assoc_data)
|
|
pt2 = cipher.decrypt_and_verify(ct, mac)
|
|
self.assertEqual(pt, pt2)
|
|
|
|
|
|
class TestVectorsWycheproof(unittest.TestCase):
|
|
|
|
def __init__(self, wycheproof_warnings):
|
|
unittest.TestCase.__init__(self)
|
|
self._wycheproof_warnings = wycheproof_warnings
|
|
|
|
def setUp(self):
|
|
comps = "Crypto.SelfTest.Cipher.test_vectors.wycheproof".split(".")
|
|
with open(pycryptodome_filename(comps, "aes_eax_test.json"), "rt") as file_in:
|
|
tv_tree = json.load(file_in)
|
|
|
|
class TestVector(object):
|
|
pass
|
|
self.tv = []
|
|
|
|
for group in tv_tree['testGroups']:
|
|
tag_size = group['tagSize'] // 8
|
|
for test in group['tests']:
|
|
tv = TestVector()
|
|
tv.tag_size = tag_size
|
|
|
|
tv.id = test['tcId']
|
|
tv.comment = test['comment']
|
|
for attr in 'key', 'iv', 'aad', 'msg', 'ct', 'tag':
|
|
setattr(tv, attr, unhexlify(test[attr]))
|
|
tv.valid = test['result'] != "invalid"
|
|
tv.warning = test['result'] == "acceptable"
|
|
self.tv.append(tv)
|
|
|
|
def shortDescription(self):
|
|
return self._id
|
|
|
|
def warn(self, tv):
|
|
if tv.warning and self._wycheproof_warnings:
|
|
import warnings
|
|
warnings.warn("Wycheproof warning: %s (%s)" % (self._id, tv.comment))
|
|
|
|
def test_encrypt(self, tv):
|
|
self._id = "Wycheproof Encrypt EAX Test #" + str(tv.id)
|
|
|
|
try:
|
|
cipher = AES.new(tv.key, AES.MODE_EAX, tv.iv, mac_len=tv.tag_size)
|
|
except ValueError as e:
|
|
assert len(tv.iv) == 0 and "Nonce cannot be empty" in str(e)
|
|
return
|
|
|
|
cipher.update(tv.aad)
|
|
ct, tag = cipher.encrypt_and_digest(tv.msg)
|
|
if tv.valid:
|
|
self.assertEqual(ct, tv.ct)
|
|
self.assertEqual(tag, tv.tag)
|
|
self.warn(tv)
|
|
|
|
def test_decrypt(self, tv):
|
|
self._id = "Wycheproof Decrypt EAX Test #" + str(tv.id)
|
|
|
|
try:
|
|
cipher = AES.new(tv.key, AES.MODE_EAX, tv.iv, mac_len=tv.tag_size)
|
|
except ValueError as e:
|
|
assert len(tv.iv) == 0 and "Nonce cannot be empty" in str(e)
|
|
return
|
|
|
|
cipher.update(tv.aad)
|
|
try:
|
|
pt = cipher.decrypt_and_verify(tv.ct, tv.tag)
|
|
except ValueError:
|
|
assert not tv.valid
|
|
else:
|
|
assert tv.valid
|
|
self.assertEqual(pt, tv.msg)
|
|
self.warn(tv)
|
|
|
|
def test_corrupt_decrypt(self, tv):
|
|
self._id = "Wycheproof Corrupt Decrypt EAX Test #" + str(tv.id)
|
|
if len(tv.iv) == 0 or len(tv.ct) < 1:
|
|
return
|
|
cipher = AES.new(tv.key, AES.MODE_EAX, tv.iv, mac_len=tv.tag_size)
|
|
cipher.update(tv.aad)
|
|
ct_corrupt = strxor(tv.ct, b"\x00" * (len(tv.ct) - 1) + b"\x01")
|
|
self.assertRaises(ValueError, cipher.decrypt_and_verify, ct_corrupt, tv.tag)
|
|
|
|
def runTest(self):
|
|
|
|
for tv in self.tv:
|
|
self.test_encrypt(tv)
|
|
self.test_decrypt(tv)
|
|
self.test_corrupt_decrypt(tv)
|
|
|
|
|
|
class TestOtherCiphers(unittest.TestCase):
|
|
|
|
@classmethod
|
|
def create_test(cls, name, factory, key_size):
|
|
|
|
def test_template(self, factory=factory, key_size=key_size):
|
|
cipher = factory.new(get_tag_random("cipher", key_size),
|
|
factory.MODE_EAX,
|
|
nonce=b"nonce")
|
|
ct, mac = cipher.encrypt_and_digest(b"plaintext")
|
|
|
|
cipher = factory.new(get_tag_random("cipher", key_size),
|
|
factory.MODE_EAX,
|
|
nonce=b"nonce")
|
|
pt2 = cipher.decrypt_and_verify(ct, mac)
|
|
|
|
self.assertEqual(b"plaintext", pt2)
|
|
|
|
setattr(cls, "test_" + name, test_template)
|
|
|
|
|
|
from Crypto.Cipher import DES, DES3, ARC2, CAST, Blowfish
|
|
|
|
TestOtherCiphers.create_test("DES_" + str(DES.key_size), DES, DES.key_size)
|
|
for ks in DES3.key_size:
|
|
TestOtherCiphers.create_test("DES3_" + str(ks), DES3, ks)
|
|
for ks in ARC2.key_size:
|
|
TestOtherCiphers.create_test("ARC2_" + str(ks), ARC2, ks)
|
|
for ks in CAST.key_size:
|
|
TestOtherCiphers.create_test("CAST_" + str(ks), CAST, ks)
|
|
for ks in Blowfish.key_size:
|
|
TestOtherCiphers.create_test("Blowfish_" + str(ks), Blowfish, ks)
|
|
|
|
|
|
def get_tests(config={}):
|
|
wycheproof_warnings = config.get('wycheproof_warnings')
|
|
|
|
tests = []
|
|
tests += list_test_cases(EaxTests)
|
|
tests += list_test_cases(EaxFSMTests)
|
|
tests += [ TestVectorsPaper() ]
|
|
tests += [ TestVectorsWycheproof(wycheproof_warnings) ]
|
|
tests += list_test_cases(TestOtherCiphers)
|
|
return tests
|
|
|
|
|
|
if __name__ == '__main__':
|
|
suite = lambda: unittest.TestSuite(get_tests())
|
|
unittest.main(defaultTest='suite')
|