support keyusage and extendedkeyusage in certificatebuilder

2 files changed, 8 insertions, 0 deletions

diff --git a/src/cryptography/hazmat/backends/openssl/backend.py b/src/cryptography/hazmat/backends/openssl/backend.py
index 0176de21..5bb91a9b 100644
--- a/src/cryptography/hazmat/backends/openssl/backend.py
+++ b/src/cryptography/hazmat/backends/openssl/backend.py
@@ -1137,6 +1137,10 @@ class Backend(object):
         for i, extension in enumerate(builder._extensions):
             if isinstance(extension.value, x509.BasicConstraints):
                 pp, r = _encode_basic_constraints(self, extension.value)
+            elif isinstance(extension.value, x509.KeyUsage):
+                pp, r = _encode_key_usage(self, extension.value)
+            elif isinstance(extension.value, x509.ExtendedKeyUsage):
+                pp, r = _encode_extended_key_usage(self, extension.value)
             elif isinstance(extension.value, x509.SubjectAlternativeName):
                 pp, r = _encode_subject_alt_name(self, extension.value)
             else:
diff --git a/src/cryptography/x509.py b/src/cryptography/x509.py
index f35582b0..defac248 100644
--- a/src/cryptography/x509.py
+++ b/src/cryptography/x509.py
@@ -1720,6 +1720,10 @@ class CertificateBuilder(object):
         """
         if isinstance(extension, BasicConstraints):
             extension = Extension(OID_BASIC_CONSTRAINTS, critical, extension)
+        elif isinstance(extension, KeyUsage):
+            extension = Extension(OID_KEY_USAGE, critical, extension)
+        elif isinstance(extension, ExtendedKeyUsage):
+            extension = Extension(OID_EXTENDED_KEY_USAGE, critical, extension)
         elif isinstance(extension, SubjectAlternativeName):
             extension = Extension(
                 OID_SUBJECT_ALTERNATIVE_NAME, critical, extension