Add public key and signature verification to browser-side API keys

content/browser/experiments/api_key_signature_verifier.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_BROWSER_EXPERIMENTS_API_KEY_SIGNATURE_VERIFIER_H_
+#define CONTENT_BROWSER_EXPERIMENTS_API_KEY_SIGNATURE_VERIFIER_H_
+
+#include <stdint.h>
+#include <string>
+
+#include "content/common/content_export.h"
+
+namespace content {
+
+class CONTENT_EXPORT ApiKeySignatureVerifier {
+ public:
+  static bool VerifySignature(const std::string& signature_text,
+                              const std::string& data);
+  static bool VerifySignature(const std::string& signature_text,
+                              const std::string& data,
+                              const uint8_t* public_key,
+                              size_t public_key_length);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_EXPERIMENTS_API_KEY_SIGNATURE_VERIFIER_H_