add hmac to commoncrypto binding

2 files changed, 47 insertions, 0 deletions

diff --git a/cryptography/hazmat/bindings/commoncrypto/binding.py b/cryptography/hazmat/bindings/commoncrypto/binding.py
index e0cd61f7..9c1af40a 100644
--- a/cryptography/hazmat/bindings/commoncrypto/binding.py
+++ b/cryptography/hazmat/bindings/commoncrypto/binding.py
@@ -25,6 +25,7 @@ class Binding(object):
     _module_prefix = "cryptography.hazmat.bindings.commoncrypto."
     _modules = [
         "common_digest",
+        "common_hmac",
     ]
 
     ffi = None
diff --git a/cryptography/hazmat/bindings/commoncrypto/common_hmac.py b/cryptography/hazmat/bindings/commoncrypto/common_hmac.py
new file mode 100644
index 00000000..a4abcb04
--- /dev/null
+++ b/cryptography/hazmat/bindings/commoncrypto/common_hmac.py
@@ -0,0 +1,46 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+INCLUDES = """
+#include <CommonCrypto/CommonHMAC.h>
+"""
+
+TYPES = """
+typedef struct {
+    ...;
+} CCHmacContext;
+enum CCHmacAlgorithm {
+    kCCHmacAlgSHA1,
+    kCCHmacAlgMD5,
+    kCCHmacAlgSHA256,
+    kCCHmacAlgSHA384,
+    kCCHmacAlgSHA512,
+    kCCHmacAlgSHA224
+};
+typedef uint32_t CCHmacAlgorithm;
+"""
+
+FUNCTIONS = """
+void CCHmacInit(CCHmacContext *, CCHmacAlgorithm, const void *, size_t);
+void CCHmacUpdate( CCHmacContext *, const void *, size_t);
+void CCHmacFinal( CCHmacContext *, void *);
+
+"""
+
+MACROS = """
+"""
+
+CUSTOMIZATIONS = """
+"""
+
+CONDITIONAL_NAMES = {}