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-rw-r--r--src/cryptography/x509.py4
-rw-r--r--tests/test_x509.py13
2 files changed, 14 insertions, 3 deletions
diff --git a/src/cryptography/x509.py b/src/cryptography/x509.py
index a091cd78..afd28f20 100644
--- a/src/cryptography/x509.py
+++ b/src/cryptography/x509.py
@@ -1473,9 +1473,7 @@ class CertificateSigningRequestBuilder(object):
OID_SUBJECT_ALTERNATIVE_NAME, critical, extension
)
elif isinstance(extension, KeyUsage):
- extension = Extension(
- OID_KEY_USAGE, critical, extension
- )
+ extension = Extension(OID_KEY_USAGE, critical, extension)
else:
raise NotImplementedError('Unsupported X.509 extension.')
# TODO: This is quadratic in the number of extensions
diff --git a/tests/test_x509.py b/tests/test_x509.py
index 133f0535..3491446d 100644
--- a/tests/test_x509.py
+++ b/tests/test_x509.py
@@ -876,6 +876,19 @@ class TestCertificateSigningRequestBuilder(object):
decipher_only=False
),
critical=False,
+ ).add_extension(
+ x509.KeyUsage(
+ digital_signature=True,
+ content_commitment=True,
+ key_encipherment=False,
+ data_encipherment=False,
+ key_agreement=False,
+ key_cert_sign=True,
+ crl_sign=False,
+ encipher_only=False,
+ decipher_only=False
+ ),
+ critical=False
)
with pytest.raises(NotImplementedError):
builder.sign(private_key, hashes.SHA256(), backend)