Adding KeyTemplate-classes missing in C++.

PiperOrigin-RevId: 192164449
GitOrigin-RevId: 8b8b91404d7190a1fa6a72c0cd830ac2537ca675

1 files changed, 69 insertions, 0 deletions

diff --git a/cc/mac/mac_key_templates.cc b/cc/mac/mac_key_templates.cc
new file mode 100644
index 000000000..eca5fe80e
--- /dev/null
+++ b/cc/mac/mac_key_templates.cc
@@ -0,0 +1,69 @@
+// Copyright 2018 Google Inc.
+//
+// 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.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "tink/mac/mac_key_templates.h"
+
+#include "proto/common.pb.h"
+#include "proto/hmac.pb.h"
+#include "proto/tink.pb.h"
+
+namespace crypto {
+namespace tink {
+namespace {
+
+using google::crypto::tink::HmacKeyFormat;
+using google::crypto::tink::HashType;
+using google::crypto::tink::KeyTemplate;
+using google::crypto::tink::OutputPrefixType;
+
+KeyTemplate* NewHmacKeyTemplate(int key_size_in_bytes,
+                                int tag_size_in_bytes,
+                                HashType hash_type) {
+  KeyTemplate* key_template = new KeyTemplate;
+  key_template->set_type_url(
+      "type.googleapis.com/google.crypto.tink.HmacKey");
+  key_template->set_output_prefix_type(OutputPrefixType::TINK);
+  HmacKeyFormat key_format;
+  key_format.set_key_size(key_size_in_bytes);
+  key_format.mutable_params()->set_tag_size(tag_size_in_bytes);
+  key_format.mutable_params()->set_hash(hash_type);
+  key_format.SerializeToString(key_template->mutable_value());
+  return key_template;
+}
+
+
+}  // anonymous namespace
+
+// static
+const KeyTemplate& MacKeyTemplates::Hmac128BittagSha256() {
+  static const KeyTemplate* key_template =
+      NewHmacKeyTemplate(/* key_size_in_bytes= */ 32,
+                         /* tag_size_in_bytes= */ 16,
+                         HashType::SHA256);
+  return *key_template;
+}
+
+// static
+const KeyTemplate& MacKeyTemplates::Hmac256BittagSha256() {
+  static const KeyTemplate* key_template =
+      NewHmacKeyTemplate(/* key_size_in_bytes= */ 32,
+                         /* tag_size_in_bytes= */ 32,
+                         HashType::SHA256);
+  return *key_template;
+}
+
+}  // namespace tink
+}  // namespace crypto