From ff80e3a27408657fef599f44ae1a9a875e005685 Mon Sep 17 00:00:00 2001
From: Christian Heimes <christian@python.org>
Date: Wed, 2 Mar 2022 21:47:04 +0200
Subject: [PATCH 2/5] Disable DSA tests in FIPS mode (#6916)
* Disable DSA tests in FIPS mode
See: #6880
* ignore coverage for nested FIPS check
* Remove if branch
* Remove skip modulus branch
* Keep tests that don't use the backend
---
.../hazmat/backends/openssl/backend.py | 7 ++-
tests/hazmat/primitives/test_dsa.py | 46 +++++++++++--------
tests/hazmat/primitives/test_serialization.py | 24 ++++++++++
tests/x509/test_x509.py | 43 ++++++++++++++---
tests/x509/test_x509_ext.py | 4 ++
5 files changed, 98 insertions(+), 26 deletions(-)
diff --git a/src/cryptography/hazmat/backends/openssl/backend.py b/src/cryptography/hazmat/backends/openssl/backend.py
index f38269e26..a6d0e8872 100644
--- a/src/cryptography/hazmat/backends/openssl/backend.py
+++ b/src/cryptography/hazmat/backends/openssl/backend.py
@@ -804,7 +804,12 @@ class Backend(BackendInterface):
self.openssl_assert(res == 1)
return evp_pkey
- def dsa_hash_supported(self, algorithm):
+ def dsa_supported(self) -> bool:
+ return not self._fips_enabled
+
+ def dsa_hash_supported(self, algorithm: hashes.HashAlgorithm) -> bool:
+ if not self.dsa_supported():
+ return False
return self.hash_supported(algorithm)
def dsa_parameters_supported(self, p, q, g):
diff --git a/tests/hazmat/primitives/test_dsa.py b/tests/hazmat/primitives/test_dsa.py
index 6028b600d..60681683d 100644
--- a/tests/hazmat/primitives/test_dsa.py
+++ b/tests/hazmat/primitives/test_dsa.py
@@ -59,7 +59,12 @@ def test_skip_if_dsa_not_supported(backend):
_skip_if_dsa_not_supported(backend, DummyHashAlgorithm(), 1, 1, 1)
-class TestDSA(object):
+
+@pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+)
+class TestDSA:
def test_generate_dsa_parameters(self, backend):
parameters = dsa.generate_parameters(2048, backend)
assert isinstance(parameters, dsa.DSAParameters)
@@ -76,11 +81,6 @@ class TestDSA(object):
),
)
def test_generate_dsa_keys(self, vector, backend):
- if (
- backend._fips_enabled
- and vector["p"] < backend._fips_dsa_min_modulus
- ):
- pytest.skip("Small modulus blocked in FIPS mode")
parameters = dsa.DSAParameterNumbers(
p=vector["p"], q=vector["q"], g=vector["g"]
).parameters(backend)
@@ -389,7 +389,12 @@ class TestDSA(object):
).private_key(backend)
-class TestDSAVerification(object):
+
+@pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+)
+class TestDSAVerification:
def test_dsa_verification(self, backend, subtests):
vectors = load_vectors_from_file(
os.path.join("asymmetric", "DSA", "FIPS_186-3", "SigVer.rsp"),
@@ -481,17 +486,12 @@ class TestDSAVerification(object):
Prehashed(hashes.SHA1()) # type: ignore[arg-type]
)
- def test_prehashed_unsupported_in_verifier_ctx(self, backend):
- public_key = DSA_KEY_1024.private_key(backend).public_key()
- with pytest.raises(TypeError), pytest.warns(
- CryptographyDeprecationWarning
- ):
- public_key.verifier(
- b"0" * 64, Prehashed(hashes.SHA1()) # type: ignore[arg-type]
- )
-
-class TestDSASignature(object):
+@pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+)
+class TestDSASignature:
def test_dsa_signing(self, backend, subtests):
vectors = load_vectors_from_file(
os.path.join("asymmetric", "DSA", "FIPS_186-3", "SigGen.txt"),
@@ -695,7 +695,11 @@ class TestDSANumberEquality(object):
assert priv != object()
-class TestDSASerialization(object):
+@pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+)
+class TestDSASerialization:
@pytest.mark.parametrize(
("fmt", "password"),
itertools.product(
@@ -916,7 +920,11 @@ class TestDSASerialization(object):
)
-class TestDSAPEMPublicKeySerialization(object):
+@pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+)
+class TestDSAPEMPublicKeySerialization:
@pytest.mark.parametrize(
("key_path", "loader_func", "encoding"),
[
diff --git a/tests/hazmat/primitives/test_serialization.py b/tests/hazmat/primitives/test_serialization.py
index fb6b753de..5a2b9fba5 100644
--- a/tests/hazmat/primitives/test_serialization.py
+++ b/tests/hazmat/primitives/test_serialization.py
@@ -141,6 +141,10 @@ class TestDERSerialization(object):
assert isinstance(key, rsa.RSAPrivateKey)
_check_rsa_private_numbers(key.private_numbers())
+ @pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+ )
@pytest.mark.parametrize(
("key_path", "password"),
[
@@ -341,6 +345,10 @@ class TestDERSerialization(object):
with pytest.raises(ValueError):
load_der_public_key(b"invalid data", backend)
+ @pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+ )
@pytest.mark.parametrize(
"key_file",
[
@@ -422,6 +430,10 @@ class TestPEMSerialization(object):
assert isinstance(key, rsa.RSAPrivateKey)
_check_rsa_private_numbers(key.private_numbers())
+ @pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+ )
@pytest.mark.parametrize(
("key_path", "password"),
[
@@ -490,6 +502,10 @@ class TestPEMSerialization(object):
numbers = key.public_numbers()
assert numbers.e == 65537
+ @pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+ )
@pytest.mark.parametrize(
("key_file"),
[
@@ -894,6 +910,10 @@ class TestPEMSerialization(object):
16,
)
+ @pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+ )
def test_load_pem_dsa_private_key(self, backend):
key = load_vectors_from_file(
os.path.join("asymmetric", "PKCS8", "unenc-dsa-pkcs8.pem"),
@@ -2313,6 +2333,10 @@ class TestOpenSSHSerialization(object):
DummyKeySerializationEncryption(),
)
+ @pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+ )
@pytest.mark.parametrize(
("key_path", "supported"),
[
diff --git a/tests/x509/test_x509.py b/tests/x509/test_x509.py
index 23e97a768..7a7a52977 100644
--- a/tests/x509/test_x509.py
+++ b/tests/x509/test_x509.py
@@ -2561,7 +2561,21 @@ class TestCertificateBuilder(object):
only_if=lambda backend: backend.hash_supported(hashes.MD5()),
skip_message="Requires OpenSSL with MD5 support",
)
- def test_sign_dsa_with_md5(self, backend):
+ @pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+ )
+ @pytest.mark.parametrize(
+ "hash_algorithm",
+ [
+ hashes.MD5(),
+ hashes.SHA3_224(),
+ hashes.SHA3_256(),
+ hashes.SHA3_384(),
+ hashes.SHA3_512(),
+ ],
+ )
+ def test_sign_dsa_with_unsupported_hash(self, hash_algorithm, backend):
private_key = DSA_KEY_2048.private_key(backend)
builder = x509.CertificateBuilder()
builder = (
@@ -2602,6 +2616,10 @@ class TestCertificateBuilder(object):
with pytest.raises(ValueError):
builder.sign(private_key, hashes.MD5(), backend)
+ @pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+ )
@pytest.mark.parametrize(
("hashalg", "hashalg_oid"),
[
@@ -2615,9 +2633,6 @@ class TestCertificateBuilder(object):
def test_build_cert_with_dsa_private_key(
self, hashalg, hashalg_oid, backend
):
- if backend._fips_enabled and hashalg is hashes.SHA1:
- pytest.skip("SHA1 not supported in FIPS mode")
-
issuer_private_key = DSA_KEY_2048.private_key(backend)
subject_private_key = DSA_KEY_2048.private_key(backend)
@@ -3646,6 +3661,10 @@ class TestCertificateSigningRequestBuilder(object):
only_if=lambda backend: backend.hash_supported(hashes.MD5()),
skip_message="Requires OpenSSL with MD5 support",
)
+ @pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+ )
def test_sign_dsa_with_md5(self, backend):
private_key = DSA_KEY_2048.private_key(backend)
builder = x509.CertificateSigningRequestBuilder().subject_name(
@@ -3969,6 +3988,10 @@ class TestCertificateSigningRequestBuilder(object):
assert basic_constraints.value.ca is True
assert basic_constraints.value.path_length == 2
+ @pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+ )
def test_build_ca_request_with_dsa(self, backend):
private_key = DSA_KEY_2048.private_key(backend)
@@ -4319,7 +4342,11 @@ class TestCertificateSigningRequestBuilder(object):
builder.sign(private_key, hashes.SHA512(), backend)
-class TestDSACertificate(object):
+@pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+)
+class TestDSACertificate:
def test_load_dsa_cert(self, backend):
cert = _load_cert(
os.path.join("x509", "custom", "dsa_selfsigned_ca.pem"),
@@ -4444,7 +4471,11 @@ class TestDSACertificate(object):
)
-class TestDSACertificateRequest(object):
+@pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+)
+class TestDSACertificateRequest:
@pytest.mark.parametrize(
("path", "loader_func"),
[
diff --git a/tests/x509/test_x509_ext.py b/tests/x509/test_x509_ext.py
index 4173dece6..66ac43d95 100644
--- a/tests/x509/test_x509_ext.py
+++ b/tests/x509/test_x509_ext.py
@@ -1712,6 +1712,10 @@ class TestSubjectKeyIdentifierExtension(object):
ski = x509.SubjectKeyIdentifier.from_public_key(cert.public_key())
assert ext.value == ski
+ @pytest.mark.supported(
+ only_if=lambda backend: backend.dsa_supported(),
+ skip_message="Does not support DSA.",
+ )
def test_from_dsa_public_key(self, backend):
cert = _load_cert(
os.path.join("x509", "custom", "dsa_selfsigned_ca.pem"),
--
2.35.1