implement support for encoding name constraints

1 files changed, 35 insertions, 0 deletions

diff --git a/tests/test_x509.py b/tests/test_x509.py
index 9b5dda69..5a1c4c54 100644
--- a/tests/test_x509.py
+++ b/tests/test_x509.py
@@ -2030,6 +2030,41 @@ class TestCertificateBuilder(object):
 
     @pytest.mark.requires_backend_interface(interface=RSABackend)
     @pytest.mark.requires_backend_interface(interface=X509Backend)
+    def test_name_constraints(self, backend):
+        issuer_private_key = RSA_KEY_2048.private_key(backend)
+        subject_private_key = RSA_KEY_2048.private_key(backend)
+
+        not_valid_before = datetime.datetime(2002, 1, 1, 12, 1)
+        not_valid_after = datetime.datetime(2030, 12, 31, 8, 30)
+
+        excluded = [x509.DNSName(u"name.local")]
+        nc = x509.NameConstraints(
+            permitted_subtrees=None, excluded_subtrees=excluded
+        )
+
+        cert = x509.CertificateBuilder().subject_name(
+            x509.Name([x509.NameAttribute(NameOID.COUNTRY_NAME, u'US')])
+        ).issuer_name(
+            x509.Name([x509.NameAttribute(NameOID.COUNTRY_NAME, u'US')])
+        ).not_valid_before(
+            not_valid_before
+        ).not_valid_after(
+            not_valid_after
+        ).public_key(
+            subject_private_key.public_key()
+        ).serial_number(
+            123
+        ).add_extension(
+            nc, critical=False
+        ).sign(issuer_private_key, hashes.SHA256(), backend)
+
+        ext = cert.extensions.get_extension_for_oid(
+            ExtensionOID.NAME_CONSTRAINTS
+        )
+        assert ext.value == nc
+
+    @pytest.mark.requires_backend_interface(interface=RSABackend)
+    @pytest.mark.requires_backend_interface(interface=X509Backend)
     def test_key_usage(self, backend):
         issuer_private_key = RSA_KEY_2048.private_key(backend)
         subject_private_key = RSA_KEY_2048.private_key(backend)