Add secret key access C++ classes.

PiperOrigin-RevId: 451402322

1 files changed, 41 insertions, 0 deletions

diff --git a/cc/secret_key_access_token.h b/cc/secret_key_access_token.h
new file mode 100644
index 000000000..1e461ee26
--- /dev/null
+++ b/cc/secret_key_access_token.h
@@ -0,0 +1,41 @@
+// Copyright 2022 Google LLC
+//
+// 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.
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#ifndef TINK_SECRET_KEY_ACCESS_TOKEN_H_
+#define TINK_SECRET_KEY_ACCESS_TOKEN_H_
+
+namespace crypto {
+namespace tink {
+
+class SecretKeyAccessToken {
+ public:
+  // Copyable and movable.
+  SecretKeyAccessToken(const SecretKeyAccessToken& other) = default;
+  SecretKeyAccessToken& operator=(const SecretKeyAccessToken& other) = default;
+  SecretKeyAccessToken(SecretKeyAccessToken&& other) = default;
+  SecretKeyAccessToken& operator=(SecretKeyAccessToken&& other) = default;
+
+ private:
+  // `InsecureKeyAccess` class requires access to the constructor.
+  friend class InsecureSecretKeyAccess;
+
+  SecretKeyAccessToken() = default;
+};
+
+}  // namespace tink
+}  // namespace crypto
+
+#endif  // TINK_SECRET_KEY_ACCESS_TOKEN_H_