[webcrypto] Refactor RSA-SSA signing.

content/child/webcrypto/openssl/rsa_sign_openssl.h

+// Copyright 2014 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_CHILD_WEBCRYPTO_OPENSSL_RSA_SIGN_OPENSSL_H_
+#define CONTENT_CHILD_WEBCRYPTO_OPENSSL_RSA_SIGN_OPENSSL_H_
+
+#include <stdint.h>
+
+#include <vector>
+
+namespace blink {
+class WebCryptoKey;
+}
+
+namespace content {
+
+namespace webcrypto {
+
+class CryptoData;
+class Status;
+
+// Helper functions for doing RSA-SSA signing and verification.
+
+Status RsaSign(const blink::WebCryptoKey& key,
+               const CryptoData& data,
+               std::vector<uint8_t>* buffer);
+
+Status RsaVerify(const blink::WebCryptoKey& key,
+                 const CryptoData& signature,
+                 const CryptoData& data,
+                 bool* signature_match);
+
+}  // namespace webcrypto
+
+}  // namespace content
+
+#endif  // CONTENT_CHILD_WEBCRYPTO_OPENSSL_RSA_SIGN_OPENSSL_H_