Refs #3331 -- added initial wycheproof integration, starting with x25519, rsa, and keywrap (#4310)
* Refs #3331 -- added initial wycheproof integration, starting with x25519 tests
diff --git a/tests/wycheproof/test_rsa.py b/tests/wycheproof/test_rsa.py
new file mode 100644
index 0000000..b8f2e19
--- /dev/null
+++ b/tests/wycheproof/test_rsa.py
@@ -0,0 +1,85 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+import binascii
+
+import pytest
+
+from cryptography.exceptions import InvalidSignature
+from cryptography.hazmat.backends.interfaces import RSABackend
+from cryptography.hazmat.primitives import hashes, serialization
+from cryptography.hazmat.primitives.asymmetric import padding
+
+
+_DIGESTS = {
+ "SHA-1": hashes.SHA1(),
+ "SHA-224": hashes.SHA224(),
+ "SHA-256": hashes.SHA256(),
+ "SHA-384": hashes.SHA384(),
+ "SHA-512": hashes.SHA512(),
+}
+
+
+def should_verify(backend, wycheproof):
+ if wycheproof.valid:
+ return True
+
+ if wycheproof.acceptable:
+ if (
+ backend._lib.CRYPTOGRAPHY_OPENSSL_110_OR_GREATER and
+ wycheproof.has_flag("MissingNull")
+ ):
+ return False
+ return True
+
+ return False
+
+
+@pytest.mark.requires_backend_interface(interface=RSABackend)
+@pytest.mark.supported(
+ only_if=lambda backend: (
+ # TODO: this also skips on LibreSSL, which is ok for now, since these
+ # don't pass on Libre, but we'll need to fix this after they resolve
+ # it.
+ not backend._lib.CRYPTOGRAPHY_OPENSSL_LESS_THAN_102
+ ),
+ skip_message=(
+ "Many of these tests fail on OpenSSL < 1.0.2 and since upstream isn't"
+ " maintaining it, they'll never be fixed."
+ ),
+)
+@pytest.mark.wycheproof_tests(
+ "rsa_signature_test.json",
+ "rsa_signature_2048_sha224_test.json",
+ "rsa_signature_2048_sha256_test.json",
+ "rsa_signature_2048_sha512_test.json",
+ "rsa_signature_3072_sha256_test.json",
+ "rsa_signature_3072_sha384_test.json",
+ "rsa_signature_3072_sha512_test.json",
+ "rsa_signature_4096_sha384_test.json",
+ "rsa_signature_4096_sha512_test.json",
+)
+def test_rsa_signature(backend, wycheproof):
+ key = serialization.load_der_public_key(
+ binascii.unhexlify(wycheproof.testgroup["keyDer"]), backend
+ )
+ digest = _DIGESTS[wycheproof.testgroup["sha"]]
+
+ if should_verify(backend, wycheproof):
+ key.verify(
+ binascii.unhexlify(wycheproof.testcase["sig"]),
+ binascii.unhexlify(wycheproof.testcase["msg"]),
+ padding.PKCS1v15(),
+ digest,
+ )
+ else:
+ with pytest.raises(InvalidSignature):
+ key.verify(
+ binascii.unhexlify(wycheproof.testcase["sig"]),
+ binascii.unhexlify(wycheproof.testcase["msg"]),
+ padding.PKCS1v15(),
+ digest,
+ )