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test_CCM.py
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# =================================================================== # # Copyright (c) 2015, Legrandin <helderijs@gmail.com> # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in # the documentation and/or other materials provided with the # distribution. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE # COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE # POSSIBILITY OF SUCH DAMAGE. # =================================================================== import unittest from binascii import unhexlify from Crypto.SelfTest.st_common import list_test_cases from Crypto.SelfTest.loader import load_test_vectors_wycheproof from Crypto.Util.py3compat import tobytes, bchr from Crypto.Cipher import AES from Crypto.Hash import SHAKE128 from Crypto.Util.strxor import strxor def get_tag_random(tag, length): return SHAKE128.new(data=tobytes(tag)).read(length) class CcmTests(unittest.TestCase): key_128 = get_tag_random("key_128", 16) nonce_96 = get_tag_random("nonce_128", 12) data = get_tag_random("data", 128) def test_loopback_128(self): cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) pt = get_tag_random("plaintext", 16 * 100) ct = cipher.encrypt(pt) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) pt2 = cipher.decrypt(ct) self.assertEqual(pt, pt2) def test_nonce(self): # If not passed, the nonce is created randomly cipher = AES.new(self.key_128, AES.MODE_CCM) nonce1 = cipher.nonce cipher = AES.new(self.key_128, AES.MODE_CCM) nonce2 = cipher.nonce self.assertEqual(len(nonce1), 11) self.assertNotEqual(nonce1, nonce2) cipher = AES.new(self.key_128, AES.MODE_CCM, self.nonce_96) ct = cipher.encrypt(self.data) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) self.assertEqual(ct, cipher.encrypt(self.data)) def test_nonce_must_be_bytes(self): self.assertRaises(TypeError, AES.new, self.key_128, AES.MODE_CCM, nonce=u'test12345678') def test_nonce_length(self): self.assertRaises(ValueError, AES.new, self.key_128, AES.MODE_CCM, nonce=b"") self.assertRaises(ValueError, AES.new, self.key_128, AES.MODE_CCM, nonce=bchr(1) * 6) self.assertRaises(ValueError, AES.new, self.key_128, AES.MODE_CCM, nonce=bchr(1) * 14) for x in range(7, 13 + 1): AES.new(self.key_128, AES.MODE_CCM, nonce=bchr(1) * x) def test_block_size(self): cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) self.assertEqual(cipher.block_size, AES.block_size) def test_nonce_attribute(self): cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) self.assertEqual(cipher.nonce, self.nonce_96) # By default, a 11 bytes long nonce is randomly generated nonce1 = AES.new(self.key_128, AES.MODE_CCM).nonce nonce2 = AES.new(self.key_128, AES.MODE_CCM).nonce self.assertEqual(len(nonce1), 11) self.assertNotEqual(nonce1, nonce2) def test_unknown_parameters(self): self.assertRaises(TypeError, AES.new, self.key_128, AES.MODE_CCM, self.nonce_96, 7) self.assertRaises(TypeError, AES.new, self.key_128, AES.MODE_CCM, nonce=self.nonce_96, unknown=7) # But some are only known by the base cipher # (e.g. use_aesni consumed by the AES module) AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, use_aesni=False) def test_null_encryption_decryption(self): for func in "encrypt", "decrypt": cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) result = getattr(cipher, func)(b"") self.assertEqual(result, b"") def test_either_encrypt_or_decrypt(self): cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher.encrypt(b"") self.assertRaises(TypeError, cipher.decrypt, b"") cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher.decrypt(b"") self.assertRaises(TypeError, cipher.encrypt, b"") def test_data_must_be_bytes(self): cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) self.assertRaises(TypeError, cipher.encrypt, u'test1234567890-*') cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) self.assertRaises(TypeError, cipher.decrypt, u'test1234567890-*') def test_mac_len(self): # Invalid MAC length for mac_len in range(3, 17 + 1, 2): self.assertRaises(ValueError, AES.new, self.key_128, AES.MODE_CCM, nonce=self.nonce_96, mac_len=mac_len) # Valid MAC length for mac_len in range(4, 16 + 1, 2): cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, mac_len=mac_len) _, mac = cipher.encrypt_and_digest(self.data) self.assertEqual(len(mac), mac_len) # Default MAC length cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) _, mac = cipher.encrypt_and_digest(self.data) self.assertEqual(len(mac), 16) def test_invalid_mac(self): from Crypto.Util.strxor import strxor_c cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) ct, mac = cipher.encrypt_and_digest(self.data) invalid_mac = strxor_c(mac, 0x01) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) self.assertRaises(ValueError, cipher.decrypt_and_verify, ct, invalid_mac) def test_hex_mac(self): cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) mac_hex = cipher.hexdigest() self.assertEqual(cipher.digest(), unhexlify(mac_hex)) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher.hexverify(mac_hex) def test_longer_assoc_data_than_declared(self): # More than zero cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, assoc_len=0) self.assertRaises(ValueError, cipher.update, b"1") # Too large cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, assoc_len=15) self.assertRaises(ValueError, cipher.update, self.data) def test_shorter_assoc_data_than_expected(self): DATA_LEN = len(self.data) # With plaintext cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, assoc_len=DATA_LEN + 1) cipher.update(self.data) self.assertRaises(ValueError, cipher.encrypt, self.data) # With empty plaintext cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, assoc_len=DATA_LEN + 1) cipher.update(self.data) self.assertRaises(ValueError, cipher.digest) # With ciphertext cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, assoc_len=DATA_LEN + 1) cipher.update(self.data) self.assertRaises(ValueError, cipher.decrypt, self.data) # With empty ciphertext cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher.update(self.data) mac = cipher.digest() cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, assoc_len=DATA_LEN + 1) cipher.update(self.data) self.assertRaises(ValueError, cipher.verify, mac) def test_shorter_and_longer_plaintext_than_declared(self): DATA_LEN = len(self.data) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, msg_len=DATA_LEN + 1) cipher.encrypt(self.data) self.assertRaises(ValueError, cipher.digest) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, msg_len=DATA_LEN - 1) self.assertRaises(ValueError, cipher.encrypt, self.data) def test_shorter_ciphertext_than_declared(self): DATA_LEN = len(self.data) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) ct, mac = cipher.encrypt_and_digest(self.data) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, msg_len=DATA_LEN + 1) cipher.decrypt(ct) self.assertRaises(ValueError, cipher.verify, mac) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, msg_len=DATA_LEN - 1) self.assertRaises(ValueError, cipher.decrypt, ct) def test_message_chunks(self): # Validate that both associated data and plaintext/ciphertext # can be broken up in chunks of arbitrary length auth_data = get_tag_random("authenticated data", 127) plaintext = get_tag_random("plaintext", 127) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher.update(auth_data) ciphertext, ref_mac = cipher.encrypt_and_digest(plaintext) def break_up(data, chunk_length): return [data[i:i+chunk_length] for i in range(0, len(data), chunk_length)] # Encryption for chunk_length in 1, 2, 3, 7, 10, 13, 16, 40, 80, 128: cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, msg_len=127, assoc_len=127) for chunk in break_up(auth_data, chunk_length): cipher.update(chunk) pt2 = b"" for chunk in break_up(ciphertext, chunk_length): pt2 += cipher.decrypt(chunk) self.assertEqual(plaintext, pt2) cipher.verify(ref_mac) # Decryption for chunk_length in 1, 2, 3, 7, 10, 13, 16, 40, 80, 128: cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, msg_len=127, assoc_len=127) for chunk in break_up(auth_data, chunk_length): cipher.update(chunk) ct2 = b"" for chunk in break_up(plaintext, chunk_length): ct2 += cipher.encrypt(chunk) self.assertEqual(ciphertext, ct2) self.assertEqual(cipher.digest(), ref_mac) def test_bytearray(self): # Encrypt key_ba = bytearray(self.key_128) nonce_ba = bytearray(self.nonce_96) header_ba = bytearray(self.data) data_ba = bytearray(self.data) cipher1 = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher1.update(self.data) ct = cipher1.encrypt(self.data) tag = cipher1.digest() cipher2 = AES.new(key_ba, AES.MODE_CCM, nonce=nonce_ba) key_ba[:3] = b"\xFF\xFF\xFF" nonce_ba[:3] = b"\xFF\xFF\xFF" cipher2.update(header_ba) header_ba[:3] = b"\xFF\xFF\xFF" ct_test = cipher2.encrypt(data_ba) data_ba[:3] = b"\xFF\xFF\xFF" tag_test = cipher2.digest() self.assertEqual(ct, ct_test) self.assertEqual(tag, tag_test) self.assertEqual(cipher1.nonce, cipher2.nonce) # Decrypt key_ba = bytearray(self.key_128) nonce_ba = bytearray(self.nonce_96) header_ba = bytearray(self.data) del data_ba cipher4 = AES.new(key_ba, AES.MODE_CCM, nonce=nonce_ba) key_ba[:3] = b"\xFF\xFF\xFF" nonce_ba[:3] = b"\xFF\xFF\xFF" cipher4.update(header_ba) header_ba[:3] = b"\xFF\xFF\xFF" pt_test = cipher4.decrypt_and_verify(bytearray(ct_test), bytearray(tag_test)) self.assertEqual(self.data, pt_test) def test_memoryview(self): # Encrypt key_mv = memoryview(bytearray(self.key_128)) nonce_mv = memoryview(bytearray(self.nonce_96)) header_mv = memoryview(bytearray(self.data)) data_mv = memoryview(bytearray(self.data)) cipher1 = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher1.update(self.data) ct = cipher1.encrypt(self.data) tag = cipher1.digest() cipher2 = AES.new(key_mv, AES.MODE_CCM, nonce=nonce_mv) key_mv[:3] = b"\xFF\xFF\xFF" nonce_mv[:3] = b"\xFF\xFF\xFF" cipher2.update(header_mv) header_mv[:3] = b"\xFF\xFF\xFF" ct_test = cipher2.encrypt(data_mv) data_mv[:3] = b"\xFF\xFF\xFF" tag_test = cipher2.digest() self.assertEqual(ct, ct_test) self.assertEqual(tag, tag_test) self.assertEqual(cipher1.nonce, cipher2.nonce) # Decrypt key_mv = memoryview(bytearray(self.key_128)) nonce_mv = memoryview(bytearray(self.nonce_96)) header_mv = memoryview(bytearray(self.data)) del data_mv cipher4 = AES.new(key_mv, AES.MODE_CCM, nonce=nonce_mv) key_mv[:3] = b"\xFF\xFF\xFF" nonce_mv[:3] = b"\xFF\xFF\xFF" cipher4.update(header_mv) header_mv[:3] = b"\xFF\xFF\xFF" pt_test = cipher4.decrypt_and_verify(memoryview(ct_test), memoryview(tag_test)) self.assertEqual(self.data, pt_test) def test_output_param(self): pt = b'5' * 128 cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) ct = cipher.encrypt(pt) tag = cipher.digest() output = bytearray(128) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) res = cipher.encrypt(pt, output=output) self.assertEqual(ct, output) self.assertEqual(res, None) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) res = cipher.decrypt(ct, output=output) self.assertEqual(pt, output) self.assertEqual(res, None) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) res, tag_out = cipher.encrypt_and_digest(pt, output=output) self.assertEqual(ct, output) self.assertEqual(res, None) self.assertEqual(tag, tag_out) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) res = cipher.decrypt_and_verify(ct, tag, output=output) self.assertEqual(pt, output) self.assertEqual(res, None) def test_output_param_memoryview(self): pt = b'5' * 128 cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) ct = cipher.encrypt(pt) output = memoryview(bytearray(128)) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher.encrypt(pt, output=output) self.assertEqual(ct, output) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher.decrypt(ct, output=output) self.assertEqual(pt, output) def test_output_param_neg(self): pt = b'5' * 16 cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) ct = cipher.encrypt(pt) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) self.assertRaises(TypeError, cipher.encrypt, pt, output=b'0'*16) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) self.assertRaises(TypeError, cipher.decrypt, ct, output=b'0'*16) shorter_output = bytearray(15) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) self.assertRaises(ValueError, cipher.encrypt, pt, output=shorter_output) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) self.assertRaises(ValueError, cipher.decrypt, ct, output=shorter_output) class CcmFSMTests(unittest.TestCase): key_128 = get_tag_random("key_128", 16) nonce_96 = get_tag_random("nonce_128", 12) data = get_tag_random("data", 16) def test_valid_init_encrypt_decrypt_digest_verify(self): # No authenticated data, fixed plaintext for assoc_len in (None, 0): for msg_len in (None, len(self.data)): # Verify path INIT->ENCRYPT->DIGEST cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, assoc_len=assoc_len, msg_len=msg_len) ct = cipher.encrypt(self.data) mac = cipher.digest() # Verify path INIT->DECRYPT->VERIFY cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, assoc_len=assoc_len, msg_len=msg_len) cipher.decrypt(ct) cipher.verify(mac) def test_valid_init_update_digest_verify(self): # No plaintext, fixed authenticated data for assoc_len in (None, len(self.data)): for msg_len in (None, 0): # Verify path INIT->UPDATE->DIGEST cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, assoc_len=assoc_len, msg_len=msg_len) cipher.update(self.data) mac = cipher.digest() # Verify path INIT->UPDATE->VERIFY cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, assoc_len=assoc_len, msg_len=msg_len) cipher.update(self.data) cipher.verify(mac) def test_valid_full_path(self): # Fixed authenticated data, fixed plaintext for assoc_len in (None, len(self.data)): for msg_len in (None, len(self.data)): # Verify path INIT->UPDATE->ENCRYPT->DIGEST cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, assoc_len=assoc_len, msg_len=msg_len) cipher.update(self.data) ct = cipher.encrypt(self.data) mac = cipher.digest() # Verify path INIT->UPDATE->DECRYPT->VERIFY cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, assoc_len=assoc_len, msg_len=msg_len) cipher.update(self.data) cipher.decrypt(ct) cipher.verify(mac) def test_valid_init_digest(self): # Verify path INIT->DIGEST cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher.digest() def test_valid_init_verify(self): # Verify path INIT->VERIFY cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) mac = cipher.digest() cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher.verify(mac) def test_valid_multiple_encrypt_or_decrypt(self): # Only possible if msg_len is declared in advance for method_name in "encrypt", "decrypt": for auth_data in (None, b"333", self.data, self.data + b"3"): if auth_data is None: assoc_len = None else: assoc_len = len(auth_data) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96, msg_len=64, assoc_len=assoc_len) if auth_data is not None: cipher.update(auth_data) method = getattr(cipher, method_name) method(self.data) method(self.data) method(self.data) method(self.data) def test_valid_multiple_digest_or_verify(self): # Multiple calls to digest cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher.update(self.data) 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_CCM, nonce=self.nonce_96) cipher.update(self.data) 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_CCM, nonce=self.nonce_96) cipher.update(self.data) ct, mac = cipher.encrypt_and_digest(self.data) # decrypt_and_verify cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher.update(self.data) pt = cipher.decrypt_and_verify(ct, mac) self.assertEqual(self.data, pt) def test_invalid_multiple_encrypt_decrypt_without_msg_len(self): # Once per method, with or without assoc. data for method_name in "encrypt", "decrypt": for assoc_data_present in (True, False): cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) if assoc_data_present: cipher.update(self.data) method = getattr(cipher, method_name) method(self.data) self.assertRaises(TypeError, method, self.data) 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_CCM, nonce=self.nonce_96, msg_len=32) if assoc_data_present: cipher.update(self.data) getattr(cipher, method1_name)(self.data) self.assertRaises(TypeError, getattr(cipher, method2_name), self.data) def test_invalid_encrypt_or_update_after_digest(self): for method_name in "encrypt", "update": cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher.encrypt(self.data) cipher.digest() self.assertRaises(TypeError, getattr(cipher, method_name), self.data) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher.encrypt_and_digest(self.data) def test_invalid_decrypt_or_update_after_verify(self): cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) ct = cipher.encrypt(self.data) mac = cipher.digest() for method_name in "decrypt", "update": cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher.decrypt(ct) cipher.verify(mac) self.assertRaises(TypeError, getattr(cipher, method_name), self.data) cipher = AES.new(self.key_128, AES.MODE_CCM, nonce=self.nonce_96) cipher.decrypt_and_verify(ct, mac) self.assertRaises(TypeError, getattr(cipher, method_name), self.data) class TestVectors(unittest.TestCase): """Class exercising the CCM test vectors found in Appendix C of NIST SP 800-38C and in RFC 3610""" # List of test vectors, each made up of: # - authenticated data # - plaintext # - ciphertext # - MAC # - AES key # - nonce test_vectors_hex = [ # NIST SP 800 38C ( '0001020304050607', '20212223', '7162015b', '4dac255d', '404142434445464748494a4b4c4d4e4f', '10111213141516'), ( '000102030405060708090a0b0c0d0e0f', '202122232425262728292a2b2c2d2e2f', 'd2a1f0e051ea5f62081a7792073d593d', '1fc64fbfaccd', '404142434445464748494a4b4c4d4e4f', '1011121314151617'), ( '000102030405060708090a0b0c0d0e0f10111213', '202122232425262728292a2b2c2d2e2f3031323334353637', 'e3b201a9f5b71a7a9b1ceaeccd97e70b6176aad9a4428aa5', '484392fbc1b09951', '404142434445464748494a4b4c4d4e4f', '101112131415161718191a1b'), ( (''.join(["%02X" % (x*16+y) for x in range(0,16) for y in range(0,16)]))*256, '202122232425262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f', '69915dad1e84c6376a68c2967e4dab615ae0fd1faec44cc484828529463ccf72', 'b4ac6bec93e8598e7f0dadbcea5b', '404142434445464748494a4b4c4d4e4f', '101112131415161718191a1b1c'), # RFC3610 ( '0001020304050607', '08090a0b0c0d0e0f101112131415161718191a1b1c1d1e', '588c979a61c663d2f066d0c2c0f989806d5f6b61dac384', '17e8d12cfdf926e0', 'c0c1c2c3c4c5c6c7c8c9cacbcccdcecf', '00000003020100a0a1a2a3a4a5'), ( '0001020304050607', '08090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f', '72c91a36e135f8cf291ca894085c87e3cc15c439c9e43a3b', 'a091d56e10400916', 'c0c1c2c3c4c5c6c7c8c9cacbcccdcecf', '00000004030201a0a1a2a3a4a5'), ( '0001020304050607', '08090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20', '51b1e5f44a197d1da46b0f8e2d282ae871e838bb64da859657', '4adaa76fbd9fb0c5', 'c0c1c2c3c4c5c6c7c8c9cacbcccdcecf', '00000005040302A0A1A2A3A4A5'), ( '000102030405060708090a0b', '0c0d0e0f101112131415161718191a1b1c1d1e', 'a28c6865939a9a79faaa5c4c2a9d4a91cdac8c', '96c861b9c9e61ef1', 'c0c1c2c3c4c5c6c7c8c9cacbcccdcecf', '00000006050403a0a1a2a3a4a5'), ( '000102030405060708090a0b', '0c0d0e0f101112131415161718191a1b1c1d1e1f', 'dcf1fb7b5d9e23fb9d4e131253658ad86ebdca3e', '51e83f077d9c2d93', 'c0c1c2c3c4c5c6c7c8c9cacbcccdcecf', '00000007060504a0a1a2a3a4a5'), ( '000102030405060708090a0b', '0c0d0e0f101112131415161718191a1b1c1d1e1f20', '6fc1b011f006568b5171a42d953d469b2570a4bd87', '405a0443ac91cb94', 'c0c1c2c3c4c5c6c7c8c9cacbcccdcecf', '00000008070605a0a1a2a3a4a5'), ( '0001020304050607', '08090a0b0c0d0e0f101112131415161718191a1b1c1d1e', '0135d1b2c95f41d5d1d4fec185d166b8094e999dfed96c', '048c56602c97acbb7490', 'c0c1c2c3c4c5c6c7c8c9cacbcccdcecf', '00000009080706a0a1a2a3a4a5'), ( '0001020304050607', '08090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f', '7b75399ac0831dd2f0bbd75879a2fd8f6cae6b6cd9b7db24', 'c17b4433f434963f34b4', 'c0c1c2c3c4c5c6c7c8c9cacbcccdcecf', '0000000a090807a0a1a2a3a4a5'), ( '0001020304050607', '08090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20', '82531a60cc24945a4b8279181ab5c84df21ce7f9b73f42e197', 'ea9c07e56b5eb17e5f4e', 'c0c1c2c3c4c5c6c7c8c9cacbcccdcecf', '0000000b0a0908a0a1a2a3a4a5'), ( '000102030405060708090a0b', '0c0d0e0f101112131415161718191a1b1c1d1e', '07342594157785152b074098330abb141b947b', '566aa9406b4d999988dd', 'c0c1c2c3c4c5c6c7c8c9cacbcccdcecf', '0000000c0b0a09a0a1a2a3a4a5'), ( '000102030405060708090a0b', '0c0d0e0f101112131415161718191a1b1c1d1e1f', '676bb20380b0e301e8ab79590a396da78b834934', 'f53aa2e9107a8b6c022c', 'c0c1c2c3c4c5c6c7c8c9cacbcccdcecf', '0000000d0c0b0aa0a1a2a3a4a5'), ( '000102030405060708090a0b', '0c0d0e0f101112131415161718191a1b1c1d1e1f20', 'c0ffa0d6f05bdb67f24d43a4338d2aa4bed7b20e43', 'cd1aa31662e7ad65d6db', 'c0c1c2c3c4c5c6c7c8c9cacbcccdcecf', '0000000e0d0c0ba0a1a2a3a4a5'), ( '0be1a88bace018b1', '08e8cf97d820ea258460e96ad9cf5289054d895ceac47c', '4cb97f86a2a4689a877947ab8091ef5386a6ffbdd080f8', 'e78cf7cb0cddd7b3', 'd7828d13b2b0bdc325a76236df93cc6b', '00412b4ea9cdbe3c9696766cfa'), ( '63018f76dc8a1bcb', '9020ea6f91bdd85afa0039ba4baff9bfb79c7028949cd0ec', '4ccb1e7ca981befaa0726c55d378061298c85c92814abc33', 'c52ee81d7d77c08a', 'd7828d13b2b0bdc325a76236df93cc6b', '0033568ef7b2633c9696766cfa'), ( 'aa6cfa36cae86b40', 'b916e0eacc1c00d7dcec68ec0b3bbb1a02de8a2d1aa346132e', 'b1d23a2220ddc0ac900d9aa03c61fcf4a559a4417767089708', 'a776796edb723506', 'd7828d13b2b0bdc325a76236df93cc6b', '00103fe41336713c9696766cfa'), ( 'd0d0735c531e1becf049c244', '12daac5630efa5396f770ce1a66b21f7b2101c', '14d253c3967b70609b7cbb7c49916028324526', '9a6f49975bcadeaf', 'd7828d13b2b0bdc325a76236df93cc6b', '00764c63b8058e3c9696766cfa'), ( '77b60f011c03e1525899bcae', 'e88b6a46c78d63e52eb8c546efb5de6f75e9cc0d', '5545ff1a085ee2efbf52b2e04bee1e2336c73e3f', '762c0c7744fe7e3c', 'd7828d13b2b0bdc325a76236df93cc6b', '00f8b678094e3b3c9696766cfa'), ( 'cd9044d2b71fdb8120ea60c0', '6435acbafb11a82e2f071d7ca4a5ebd93a803ba87f', '009769ecabdf48625594c59251e6035722675e04c8', '47099e5ae0704551', 'd7828d13b2b0bdc325a76236df93cc6b', '00d560912d3f703c9696766cfa'), ( 'd85bc7e69f944fb8', '8a19b950bcf71a018e5e6701c91787659809d67dbedd18', 'bc218daa947427b6db386a99ac1aef23ade0b52939cb6a', '637cf9bec2408897c6ba', 'd7828d13b2b0bdc325a76236df93cc6b', '0042fff8f1951c3c9696766cfa'), ( '74a0ebc9069f5b37', '1761433c37c5a35fc1f39f406302eb907c6163be38c98437', '5810e6fd25874022e80361a478e3e9cf484ab04f447efff6', 'f0a477cc2fc9bf548944', 'd7828d13b2b0bdc325a76236df93cc6b', '00920f40e56cdc3c9696766cfa'), ( '44a3aa3aae6475ca', 'a434a8e58500c6e41530538862d686ea9e81301b5ae4226bfa', 'f2beed7bc5098e83feb5b31608f8e29c38819a89c8e776f154', '4d4151a4ed3a8b87b9ce', 'd7828d13b2b0bdc325a76236df93cc6b', '0027ca0c7120bc3c9696766cfa'), ( 'ec46bb63b02520c33c49fd70', 'b96b49e21d621741632875db7f6c9243d2d7c2', '31d750a09da3ed7fddd49a2032aabf17ec8ebf', '7d22c8088c666be5c197', 'd7828d13b2b0bdc325a76236df93cc6b', '005b8ccbcd9af83c9696766cfa'), ( '47a65ac78b3d594227e85e71', 'e2fcfbb880442c731bf95167c8ffd7895e337076', 'e882f1dbd38ce3eda7c23f04dd65071eb41342ac', 'df7e00dccec7ae52987d', 'd7828d13b2b0bdc325a76236df93cc6b', '003ebe94044b9a3c9696766cfa'), ( '6e37a6ef546d955d34ab6059', 'abf21c0b02feb88f856df4a37381bce3cc128517d4', 'f32905b88a641b04b9c9ffb58cc390900f3da12ab1', '6dce9e82efa16da62059', 'd7828d13b2b0bdc325a76236df93cc6b', '008d493b30ae8b3c9696766cfa'), ] 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_CCM, 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_CCM, 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, **extra_params): unittest.TestCase.__init__(self) self._wycheproof_warnings = wycheproof_warnings self._extra_params = extra_params self._id = "None" def setUp(self): def filter_tag(group): return group['tagSize'] // 8 self.tv = load_test_vectors_wycheproof(("Cipher", "wycheproof"), "aes_ccm_test.json", "Wycheproof AES CCM", group_tag={'tag_size': filter_tag}) 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 CCM Test #" + str(tv.id) try: cipher = AES.new(tv.key, AES.MODE_CCM, tv.iv, mac_len=tv.tag_size, **self._extra_params) except ValueError as e: if len(tv.iv) not in range(7, 13 + 1, 2) and "Length of parameter 'nonce'" in str(e): assert not tv.valid return if tv.tag_size not in range(4, 16 + 1, 2) and "Parameter 'mac_len'" in str(e): assert not tv.valid return raise e 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 CCM Test #" + str(tv.id) try: cipher = AES.new(tv.key, AES.MODE_CCM, tv.iv, mac_len=tv.tag_size, **self._extra_params) except ValueError as e: if len(tv.iv) not in range(7, 13 + 1, 2) and "Length of parameter 'nonce'" in str(e): assert not tv.valid return if tv.tag_size not in range(4, 16 + 1, 2) and "Parameter 'mac_len'" in str(e): assert not tv.valid return raise e 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 CCM Test #" + str(tv.id) if len(tv.iv) not in range(7, 13 + 1, 2) or len(tv.ct) == 0: return cipher = AES.new(tv.key, AES.MODE_CCM, tv.iv, mac_len=tv.tag_size, **self._extra_params) 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) def get_tests(config={}): wycheproof_warnings = config.get('wycheproof_warnings') tests = [] tests += list_test_cases(CcmTests) tests += list_test_cases(CcmFSMTests) tests += [TestVectors()] tests += [TestVectorsWycheproof(wycheproof_warnings)] return tests if __name__ == '__main__': def suite(): unittest.TestSuite(get_tests()) unittest.main(defaultTest='suite')