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1# This file is dual licensed under the terms of the Apache License, Version
2# 2.0, and the BSD License. See the LICENSE file in the root of this repository
3# for complete details.
4
5from __future__ import absolute_import, division, print_function
6
7import binascii
8
9import pytest
10
11from cryptography.hazmat.backends.interfaces import HMACBackend
12from cryptography.hazmat.primitives import hashes, hmac
13
14from .utils import generate_hmac_test
15from ...utils import load_hash_vectors
16
17
18@pytest.mark.supported(
19    only_if=lambda backend: backend.hmac_supported(hashes.MD5()),
20    skip_message="Does not support MD5",
21)
22@pytest.mark.requires_backend_interface(interface=HMACBackend)
23class TestHMACMD5(object):
24    test_hmac_md5 = generate_hmac_test(
25        load_hash_vectors,
26        "HMAC",
27        ["rfc-2202-md5.txt"],
28        hashes.MD5(),
29    )
30
31
32@pytest.mark.supported(
33    only_if=lambda backend: backend.hmac_supported(hashes.SHA1()),
34    skip_message="Does not support SHA1",
35)
36@pytest.mark.requires_backend_interface(interface=HMACBackend)
37class TestHMACSHA1(object):
38    test_hmac_sha1 = generate_hmac_test(
39        load_hash_vectors,
40        "HMAC",
41        ["rfc-2202-sha1.txt"],
42        hashes.SHA1(),
43    )
44
45
46@pytest.mark.supported(
47    only_if=lambda backend: backend.hmac_supported(hashes.SHA224()),
48    skip_message="Does not support SHA224",
49)
50@pytest.mark.requires_backend_interface(interface=HMACBackend)
51class TestHMACSHA224(object):
52    test_hmac_sha224 = generate_hmac_test(
53        load_hash_vectors,
54        "HMAC",
55        ["rfc-4231-sha224.txt"],
56        hashes.SHA224(),
57    )
58
59
60@pytest.mark.supported(
61    only_if=lambda backend: backend.hmac_supported(hashes.SHA256()),
62    skip_message="Does not support SHA256",
63)
64@pytest.mark.requires_backend_interface(interface=HMACBackend)
65class TestHMACSHA256(object):
66    test_hmac_sha256 = generate_hmac_test(
67        load_hash_vectors,
68        "HMAC",
69        ["rfc-4231-sha256.txt"],
70        hashes.SHA256(),
71    )
72
73
74@pytest.mark.supported(
75    only_if=lambda backend: backend.hmac_supported(hashes.SHA384()),
76    skip_message="Does not support SHA384",
77)
78@pytest.mark.requires_backend_interface(interface=HMACBackend)
79class TestHMACSHA384(object):
80    test_hmac_sha384 = generate_hmac_test(
81        load_hash_vectors,
82        "HMAC",
83        ["rfc-4231-sha384.txt"],
84        hashes.SHA384(),
85    )
86
87
88@pytest.mark.supported(
89    only_if=lambda backend: backend.hmac_supported(hashes.SHA512()),
90    skip_message="Does not support SHA512",
91)
92@pytest.mark.requires_backend_interface(interface=HMACBackend)
93class TestHMACSHA512(object):
94    test_hmac_sha512 = generate_hmac_test(
95        load_hash_vectors,
96        "HMAC",
97        ["rfc-4231-sha512.txt"],
98        hashes.SHA512(),
99    )
100
101
102@pytest.mark.supported(
103    only_if=lambda backend: backend.hmac_supported(
104        hashes.BLAKE2b(digest_size=64)
105    ),
106    skip_message="Does not support BLAKE2",
107)
108@pytest.mark.requires_backend_interface(interface=HMACBackend)
109class TestHMACBLAKE2(object):
110    def test_blake2b(self, backend):
111        h = hmac.HMAC(b"0" * 64, hashes.BLAKE2b(digest_size=64), backend)
112        h.update(b"test")
113        digest = h.finalize()
114        assert digest == binascii.unhexlify(
115            b"b5319122f8a24ba134a0c9851922448104e25be5d1b91265c0c68b22722f0f29"
116            b"87dba4aeaa69e6bed7edc44f48d6b1be493a3ce583f9c737c53d6bacc09e2f32"
117        )
118
119    def test_blake2s(self, backend):
120        h = hmac.HMAC(b"0" * 32, hashes.BLAKE2s(digest_size=32), backend)
121        h.update(b"test")
122        digest = h.finalize()
123        assert digest == binascii.unhexlify(
124            b"51477cc5bdf1faf952cf97bb934ee936de1f4d5d7448a84eeb6f98d23b392166"
125        )
126