658 lines
27 KiB
Python
658 lines
27 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 unittest
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from Crypto.SelfTest.st_common import list_test_cases
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from Crypto.Util.py3compat import unhexlify, tobytes, bchr, b
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from Crypto.Cipher import AES
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from Crypto.Hash import SHAKE128
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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 GcmTests(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_loopback_128(self):
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cipher = AES.new(self.key_128, AES.MODE_GCM, 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_GCM, 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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# Nonce is optional (a random one will be created)
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AES.new(self.key_128, AES.MODE_GCM)
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cipher = AES.new(self.key_128, AES.MODE_GCM, 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_GCM, nonce=self.nonce_96)
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self.assertEqual(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_GCM,
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nonce='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_GCM,
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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_GCM, 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_GCM, nonce=self.nonce_96)
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self.assertEqual(cipher.block_size, AES.block_size)
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def test_nonce_attribute(self):
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cipher = AES.new(self.key_128, AES.MODE_GCM, nonce=self.nonce_96)
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self.assertEqual(cipher.nonce, self.nonce_96)
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# By default, a 15 bytes long nonce is randomly generated
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nonce1 = AES.new(self.key_128, AES.MODE_GCM).nonce
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nonce2 = AES.new(self.key_128, AES.MODE_GCM).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_GCM,
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self.nonce_96, 7)
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self.assertRaises(TypeError, AES.new, self.key_128, AES.MODE_GCM,
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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_GCM, 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_GCM, 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_GCM, 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_GCM, 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_GCM, nonce=self.nonce_96)
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self.assertRaises(TypeError, cipher.encrypt, 'test1234567890-*')
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cipher = AES.new(self.key_128, AES.MODE_GCM, nonce=self.nonce_96)
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self.assertRaises(TypeError, cipher.decrypt, '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_GCM,
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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_GCM,
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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_GCM, 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_GCM, 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_GCM, 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_GCM, 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_GCM, 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_GCM, 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_GCM, 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_GCM, 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_GCM, 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.assertEqual(cipher.digest(), ref_mac)
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class GcmFSMTests(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_GCM,
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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_GCM,
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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_GCM,
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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_GCM,
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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_GCM,
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nonce=self.nonce_96)
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cipher.update(self.data_128)
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ct = cipher.encrypt(self.data_128)
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mac = cipher.digest()
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# Verify path INIT->UPDATE->DECRYPT->VERIFY
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cipher = AES.new(self.key_128, AES.MODE_GCM,
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nonce=self.nonce_96)
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cipher.update(self.data_128)
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cipher.decrypt(ct)
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cipher.verify(mac)
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def test_valid_init_digest(self):
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# Verify path INIT->DIGEST
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cipher = AES.new(self.key_128, AES.MODE_GCM, nonce=self.nonce_96)
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cipher.digest()
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def test_valid_init_verify(self):
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# Verify path INIT->VERIFY
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cipher = AES.new(self.key_128, AES.MODE_GCM, nonce=self.nonce_96)
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mac = cipher.digest()
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cipher = AES.new(self.key_128, AES.MODE_GCM, nonce=self.nonce_96)
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cipher.verify(mac)
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def test_valid_multiple_encrypt_or_decrypt(self):
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for method_name in "encrypt", "decrypt":
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for auth_data in (None, b("333"), self.data_128,
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self.data_128 + b("3")):
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if auth_data is None:
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assoc_len = None
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else:
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assoc_len = len(auth_data)
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cipher = AES.new(self.key_128, AES.MODE_GCM,
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nonce=self.nonce_96)
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if auth_data is not None:
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cipher.update(auth_data)
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method = getattr(cipher, method_name)
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method(self.data_128)
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method(self.data_128)
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method(self.data_128)
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method(self.data_128)
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def test_valid_multiple_digest_or_verify(self):
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# Multiple calls to digest
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cipher = AES.new(self.key_128, AES.MODE_GCM, nonce=self.nonce_96)
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cipher.update(self.data_128)
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first_mac = cipher.digest()
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for x in range(4):
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self.assertEqual(first_mac, cipher.digest())
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# Multiple calls to verify
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cipher = AES.new(self.key_128, AES.MODE_GCM, nonce=self.nonce_96)
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cipher.update(self.data_128)
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for x in range(5):
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cipher.verify(first_mac)
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def test_valid_encrypt_and_digest_decrypt_and_verify(self):
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# encrypt_and_digest
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cipher = AES.new(self.key_128, AES.MODE_GCM, nonce=self.nonce_96)
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cipher.update(self.data_128)
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ct, mac = cipher.encrypt_and_digest(self.data_128)
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# decrypt_and_verify
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cipher = AES.new(self.key_128, AES.MODE_GCM, nonce=self.nonce_96)
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cipher.update(self.data_128)
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pt = cipher.decrypt_and_verify(ct, mac)
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self.assertEqual(self.data_128, pt)
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def test_invalid_mixing_encrypt_decrypt(self):
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# Once per method, with or without assoc. data
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for method1_name, method2_name in (("encrypt", "decrypt"),
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("decrypt", "encrypt")):
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for assoc_data_present in (True, False):
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cipher = AES.new(self.key_128, AES.MODE_GCM,
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nonce=self.nonce_96)
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if assoc_data_present:
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cipher.update(self.data_128)
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getattr(cipher, method1_name)(self.data_128)
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self.assertRaises(TypeError, getattr(cipher, method2_name),
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self.data_128)
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def test_invalid_encrypt_or_update_after_digest(self):
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for method_name in "encrypt", "update":
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cipher = AES.new(self.key_128, AES.MODE_GCM, nonce=self.nonce_96)
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cipher.encrypt(self.data_128)
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cipher.digest()
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self.assertRaises(TypeError, getattr(cipher, method_name),
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self.data_128)
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cipher = AES.new(self.key_128, AES.MODE_GCM, nonce=self.nonce_96)
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cipher.encrypt_and_digest(self.data_128)
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def test_invalid_decrypt_or_update_after_verify(self):
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cipher = AES.new(self.key_128, AES.MODE_GCM, 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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for method_name in "decrypt", "update":
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cipher = AES.new(self.key_128, AES.MODE_GCM, nonce=self.nonce_96)
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cipher.decrypt(ct)
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cipher.verify(mac)
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self.assertRaises(TypeError, getattr(cipher, method_name),
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self.data_128)
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cipher = AES.new(self.key_128, AES.MODE_GCM, nonce=self.nonce_96)
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cipher.decrypt_and_verify(ct, mac)
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self.assertRaises(TypeError, getattr(cipher, method_name),
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self.data_128)
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class TestVectors(unittest.TestCase):
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"""Class exercising the GCM test vectors found in
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http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/proposedmodes/gcm/gcm-revised-spec.pdf"""
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# List of test vectors, each made up of:
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# - authenticated data
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# - plaintext
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# - ciphertext
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# - MAC
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# - AES key
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# - nonce
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test_vectors = [
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(
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'',
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'',
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'',
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'58e2fccefa7e3061367f1d57a4e7455a',
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'00000000000000000000000000000000',
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'000000000000000000000000'
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),
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(
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'',
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'00000000000000000000000000000000',
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'0388dace60b6a392f328c2b971b2fe78',
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'ab6e47d42cec13bdf53a67b21257bddf',
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'00000000000000000000000000000000',
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'000000000000000000000000'
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),
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(
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'',
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'd9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a72' +
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'1c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b391aafd255',
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'42831ec2217774244b7221b784d0d49ce3aa212f2c02a4e035c17e2329aca12e' +
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'21d514b25466931c7d8f6a5aac84aa051ba30b396a0aac973d58e091473f5985',
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'4d5c2af327cd64a62cf35abd2ba6fab4',
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'feffe9928665731c6d6a8f9467308308',
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'cafebabefacedbaddecaf888'
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),
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(
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'feedfacedeadbeeffeedfacedeadbeefabaddad2',
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'd9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a72' +
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'1c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39',
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'42831ec2217774244b7221b784d0d49ce3aa212f2c02a4e035c17e2329aca12e' +
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'21d514b25466931c7d8f6a5aac84aa051ba30b396a0aac973d58e091',
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'5bc94fbc3221a5db94fae95ae7121a47',
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'feffe9928665731c6d6a8f9467308308',
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'cafebabefacedbaddecaf888'
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),
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(
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'feedfacedeadbeeffeedfacedeadbeefabaddad2',
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'd9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a72' +
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'1c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39',
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'61353b4c2806934a777ff51fa22a4755699b2a714fcdc6f83766e5f97b6c7423' +
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'73806900e49f24b22b097544d4896b424989b5e1ebac0f07c23f4598',
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'3612d2e79e3b0785561be14aaca2fccb',
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'feffe9928665731c6d6a8f9467308308',
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'cafebabefacedbad'
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),
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(
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'feedfacedeadbeeffeedfacedeadbeefabaddad2',
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'd9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a72' +
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'1c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39',
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|
'8ce24998625615b603a033aca13fb894be9112a5c3a211a8ba262a3cca7e2ca7' +
|
|
'01e4a9a4fba43c90ccdcb281d48c7c6fd62875d2aca417034c34aee5',
|
|
'619cc5aefffe0bfa462af43c1699d050',
|
|
'feffe9928665731c6d6a8f9467308308',
|
|
'9313225df88406e555909c5aff5269aa' +
|
|
'6a7a9538534f7da1e4c303d2a318a728c3c0c95156809539fcf0e2429a6b5254'+
|
|
'16aedbf5a0de6a57a637b39b'
|
|
),
|
|
(
|
|
'',
|
|
'',
|
|
'',
|
|
'cd33b28ac773f74ba00ed1f312572435',
|
|
'000000000000000000000000000000000000000000000000',
|
|
'000000000000000000000000'
|
|
),
|
|
(
|
|
'',
|
|
'00000000000000000000000000000000',
|
|
'98e7247c07f0fe411c267e4384b0f600',
|
|
'2ff58d80033927ab8ef4d4587514f0fb',
|
|
'000000000000000000000000000000000000000000000000',
|
|
'000000000000000000000000'
|
|
),
|
|
(
|
|
'',
|
|
'd9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a72' +
|
|
'1c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b391aafd255',
|
|
'3980ca0b3c00e841eb06fac4872a2757859e1ceaa6efd984628593b40ca1e19c' +
|
|
'7d773d00c144c525ac619d18c84a3f4718e2448b2fe324d9ccda2710acade256',
|
|
'9924a7c8587336bfb118024db8674a14',
|
|
'feffe9928665731c6d6a8f9467308308feffe9928665731c',
|
|
'cafebabefacedbaddecaf888'
|
|
),
|
|
(
|
|
'feedfacedeadbeeffeedfacedeadbeefabaddad2',
|
|
'd9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a72' +
|
|
'1c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39',
|
|
'3980ca0b3c00e841eb06fac4872a2757859e1ceaa6efd984628593b40ca1e19c' +
|
|
'7d773d00c144c525ac619d18c84a3f4718e2448b2fe324d9ccda2710',
|
|
'2519498e80f1478f37ba55bd6d27618c',
|
|
'feffe9928665731c6d6a8f9467308308feffe9928665731c',
|
|
'cafebabefacedbaddecaf888'
|
|
),
|
|
(
|
|
'feedfacedeadbeeffeedfacedeadbeefabaddad2',
|
|
'd9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a72' +
|
|
'1c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39',
|
|
'0f10f599ae14a154ed24b36e25324db8c566632ef2bbb34f8347280fc4507057' +
|
|
'fddc29df9a471f75c66541d4d4dad1c9e93a19a58e8b473fa0f062f7',
|
|
'65dcc57fcf623a24094fcca40d3533f8',
|
|
'feffe9928665731c6d6a8f9467308308feffe9928665731c',
|
|
'cafebabefacedbad'
|
|
),
|
|
(
|
|
'feedfacedeadbeeffeedfacedeadbeefabaddad2',
|
|
'd9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a72' +
|
|
'1c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39',
|
|
'd27e88681ce3243c4830165a8fdcf9ff1de9a1d8e6b447ef6ef7b79828666e45' +
|
|
'81e79012af34ddd9e2f037589b292db3e67c036745fa22e7e9b7373b',
|
|
'dcf566ff291c25bbb8568fc3d376a6d9',
|
|
'feffe9928665731c6d6a8f9467308308feffe9928665731c',
|
|
'9313225df88406e555909c5aff5269aa' +
|
|
'6a7a9538534f7da1e4c303d2a318a728c3c0c95156809539fcf0e2429a6b5254' +
|
|
'16aedbf5a0de6a57a637b39b'
|
|
),
|
|
(
|
|
'',
|
|
'',
|
|
'',
|
|
'530f8afbc74536b9a963b4f1c4cb738b',
|
|
'0000000000000000000000000000000000000000000000000000000000000000',
|
|
'000000000000000000000000'
|
|
),
|
|
(
|
|
'',
|
|
'00000000000000000000000000000000',
|
|
'cea7403d4d606b6e074ec5d3baf39d18',
|
|
'd0d1c8a799996bf0265b98b5d48ab919',
|
|
'0000000000000000000000000000000000000000000000000000000000000000',
|
|
'000000000000000000000000'
|
|
),
|
|
( '',
|
|
'd9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a72' +
|
|
'1c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b391aafd255',
|
|
'522dc1f099567d07f47f37a32a84427d643a8cdcbfe5c0c97598a2bd2555d1aa' +
|
|
'8cb08e48590dbb3da7b08b1056828838c5f61e6393ba7a0abcc9f662898015ad',
|
|
'b094dac5d93471bdec1a502270e3cc6c',
|
|
'feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308',
|
|
'cafebabefacedbaddecaf888'
|
|
),
|
|
(
|
|
'feedfacedeadbeeffeedfacedeadbeefabaddad2',
|
|
'd9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a72' +
|
|
'1c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39',
|
|
'522dc1f099567d07f47f37a32a84427d643a8cdcbfe5c0c97598a2bd2555d1aa' +
|
|
'8cb08e48590dbb3da7b08b1056828838c5f61e6393ba7a0abcc9f662',
|
|
'76fc6ece0f4e1768cddf8853bb2d551b',
|
|
'feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308',
|
|
'cafebabefacedbaddecaf888'
|
|
),
|
|
(
|
|
'feedfacedeadbeeffeedfacedeadbeefabaddad2',
|
|
'd9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a72' +
|
|
'1c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39',
|
|
'c3762df1ca787d32ae47c13bf19844cbaf1ae14d0b976afac52ff7d79bba9de0' +
|
|
'feb582d33934a4f0954cc2363bc73f7862ac430e64abe499f47c9b1f',
|
|
'3a337dbf46a792c45e454913fe2ea8f2',
|
|
'feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308',
|
|
'cafebabefacedbad'
|
|
),
|
|
(
|
|
'feedfacedeadbeeffeedfacedeadbeefabaddad2',
|
|
'd9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a72' +
|
|
'1c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39',
|
|
'5a8def2f0c9e53f1f75d7853659e2a20eeb2b22aafde6419a058ab4f6f746bf4' +
|
|
'0fc0c3b780f244452da3ebf1c5d82cdea2418997200ef82e44ae7e3f',
|
|
'a44a8266ee1c8eb0c8b5d4cf5ae9f19a',
|
|
'feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308',
|
|
'9313225df88406e555909c5aff5269aa' +
|
|
'6a7a9538534f7da1e4c303d2a318a728c3c0c95156809539fcf0e2429a6b5254'+
|
|
'16aedbf5a0de6a57a637b39b'
|
|
)
|
|
]
|
|
|
|
for index, tv in enumerate(test_vectors):
|
|
test_vectors[index] = (unhexlify(x) for x in tv)
|
|
|
|
def runTest(self):
|
|
for assoc_data, pt, ct, mac, key, nonce in self.test_vectors:
|
|
|
|
# Encrypt
|
|
cipher = AES.new(key, AES.MODE_GCM, 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_GCM, nonce, mac_len=len(mac))
|
|
cipher.update(assoc_data)
|
|
pt2 = cipher.decrypt_and_verify(ct, mac)
|
|
self.assertEqual(pt, pt2)
|
|
|
|
|
|
class TestVectorsGueronKrasnov(unittest.TestCase):
|
|
"""Class exercising the GCM test vectors found in
|
|
'The fragility of AES-GCM authentication algorithm', Gueron, Krasnov
|
|
https://eprint.iacr.org/2013/157.pdf"""
|
|
|
|
def test_1(self):
|
|
key = unhexlify("3da6c536d6295579c0959a7043efb503")
|
|
iv = unhexlify("2b926197d34e091ef722db94")
|
|
aad = unhexlify("00000000000000000000000000000000" +
|
|
"000102030405060708090a0b0c0d0e0f" +
|
|
"101112131415161718191a1b1c1d1e1f" +
|
|
"202122232425262728292a2b2c2d2e2f" +
|
|
"303132333435363738393a3b3c3d3e3f")
|
|
digest = unhexlify("69dd586555ce3fcc89663801a71d957b")
|
|
|
|
cipher = AES.new(key, AES.MODE_GCM, iv).update(aad)
|
|
self.assertEqual(digest, cipher.digest())
|
|
|
|
def test_2(self):
|
|
key = unhexlify("843ffcf5d2b72694d19ed01d01249412")
|
|
iv = unhexlify("dbcca32ebf9b804617c3aa9e")
|
|
aad = unhexlify("00000000000000000000000000000000" +
|
|
"101112131415161718191a1b1c1d1e1f")
|
|
pt = unhexlify("000102030405060708090a0b0c0d0e0f" +
|
|
"101112131415161718191a1b1c1d1e1f" +
|
|
"202122232425262728292a2b2c2d2e2f" +
|
|
"303132333435363738393a3b3c3d3e3f" +
|
|
"404142434445464748494a4b4c4d4e4f")
|
|
ct = unhexlify("6268c6fa2a80b2d137467f092f657ac0" +
|
|
"4d89be2beaa623d61b5a868c8f03ff95" +
|
|
"d3dcee23ad2f1ab3a6c80eaf4b140eb0" +
|
|
"5de3457f0fbc111a6b43d0763aa422a3" +
|
|
"013cf1dc37fe417d1fbfc449b75d4cc5")
|
|
digest = unhexlify("3b629ccfbc1119b7319e1dce2cd6fd6d")
|
|
|
|
cipher = AES.new(key, AES.MODE_GCM, iv).update(aad)
|
|
ct2, digest2 = cipher.encrypt_and_digest(pt)
|
|
|
|
self.assertEqual(ct, ct2)
|
|
self.assertEqual(digest, digest2)
|
|
|
|
|
|
from Crypto.SelfTest.loader import load_tests
|
|
|
|
|
|
class NISTTestVectorsGCM(unittest.TestCase):
|
|
pass
|
|
|
|
test_vectors_nist = load_tests(
|
|
("Crypto", "SelfTest", "Cipher", "test_vectors", "AES"),
|
|
"gcmDecrypt128.rsp",
|
|
"GCM decrypt",
|
|
{ "count" : lambda x: int(x) })
|
|
|
|
test_vectors_nist += load_tests(
|
|
("Crypto", "SelfTest", "Cipher", "test_vectors", "AES"),
|
|
"gcmEncryptExtIV128.rsp",
|
|
"GCM encrypt",
|
|
{ "count" : lambda x: int(x) })
|
|
|
|
for idx, tv in enumerate(test_vectors_nist):
|
|
|
|
# The test vector file contains some directive lines
|
|
if isinstance(tv, str):
|
|
continue
|
|
|
|
def single_test(self, tv=tv):
|
|
|
|
self.description = tv.desc
|
|
cipher = AES.new(tv.key, AES.MODE_GCM, nonce=tv.iv,
|
|
mac_len=len(tv.tag))
|
|
cipher.update(tv.aad)
|
|
if "FAIL" in tv.others:
|
|
self.assertRaises(ValueError, cipher.decrypt_and_verify,
|
|
tv.ct, tv.tag)
|
|
else:
|
|
pt = cipher.decrypt_and_verify(tv.ct, tv.tag)
|
|
self.assertEqual(pt, tv.pt)
|
|
|
|
setattr(NISTTestVectorsGCM, "test_%d" % idx, single_test)
|
|
|
|
|
|
def get_tests(config={}):
|
|
tests = []
|
|
tests += list_test_cases(GcmTests)
|
|
tests += list_test_cases(GcmFSMTests)
|
|
tests += [TestVectors()]
|
|
tests += list_test_cases(TestVectorsGueronKrasnov)
|
|
tests += list_test_cases(NISTTestVectorsGCM)
|
|
return tests
|
|
|
|
|
|
if __name__ == '__main__':
|
|
suite = lambda: unittest.TestSuite(get_tests())
|
|
unittest.main(defaultTest='suite')
|