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77 lines
2.6 KiB
77 lines
2.6 KiB
# This file is dual licensed under the terms of the Apache License, Version
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# 2.0, and the BSD License. See the LICENSE file in the root of this repository
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# for complete details.
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from __future__ import absolute_import, division, print_function
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import binascii
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import pytest
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from cryptography.exceptions import InvalidSignature, UnsupportedAlgorithm
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from cryptography.hazmat.backends.interfaces import EllipticCurveBackend
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from cryptography.hazmat.primitives import hashes, serialization
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from cryptography.hazmat.primitives.asymmetric import ec
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_DIGESTS = {
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"SHA-1": hashes.SHA1(),
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"SHA-224": hashes.SHA224(),
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"SHA-256": hashes.SHA256(),
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"SHA-384": hashes.SHA384(),
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"SHA-512": hashes.SHA512(),
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}
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@pytest.mark.requires_backend_interface(interface=EllipticCurveBackend)
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@pytest.mark.wycheproof_tests(
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"ecdsa_test.json",
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"ecdsa_brainpoolP224r1_sha224_test.json",
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"ecdsa_brainpoolP256r1_sha256_test.json",
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"ecdsa_brainpoolP320r1_sha384_test.json",
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"ecdsa_brainpoolP384r1_sha384_test.json",
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"ecdsa_brainpoolP512r1_sha512_test.json",
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"ecdsa_secp224r1_sha224_test.json",
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"ecdsa_secp224r1_sha256_test.json",
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"ecdsa_secp224r1_sha512_test.json",
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"ecdsa_secp256k1_sha256_test.json",
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"ecdsa_secp256k1_sha512_test.json",
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"ecdsa_secp256r1_sha256_test.json",
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"ecdsa_secp256r1_sha512_test.json",
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"ecdsa_secp384r1_sha384_test.json",
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"ecdsa_secp384r1_sha512_test.json",
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"ecdsa_secp521r1_sha512_test.json",
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)
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def test_ecdsa_signature(backend, wycheproof):
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try:
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key = serialization.load_der_public_key(
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binascii.unhexlify(wycheproof.testgroup["keyDer"]), backend
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)
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except (UnsupportedAlgorithm, ValueError):
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# In OpenSSL 1.0.1, some keys fail to load with ValueError, instead of
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# Unsupported Algorithm. We can remove handling for that exception
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# when we drop support.
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pytest.skip(
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"unable to load key (curve {})".format(
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wycheproof.testgroup["key"]["curve"]
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)
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)
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digest = _DIGESTS[wycheproof.testgroup["sha"]]
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if (
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wycheproof.valid or
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(wycheproof.acceptable and not wycheproof.has_flag("MissingZero"))
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):
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key.verify(
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binascii.unhexlify(wycheproof.testcase["sig"]),
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binascii.unhexlify(wycheproof.testcase["msg"]),
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ec.ECDSA(digest),
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)
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else:
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with pytest.raises(InvalidSignature):
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key.verify(
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binascii.unhexlify(wycheproof.testcase["sig"]),
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binascii.unhexlify(wycheproof.testcase["msg"]),
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ec.ECDSA(digest),
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)
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