[webcrypto] Add RSASSA-PKCS1-v1_5 sign and verify for NSS.

content/renderer/webcrypto/webcrypto_util.h

 // Copyright (c) 2013 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_RENDERER_WEBCRYPTO_WEBCRYPTO_UTIL_H_
 #define CONTENT_RENDERER_WEBCRYPTO_WEBCRYPTO_UTIL_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 17 matching lines @@
 void ShrinkBuffer(blink::WebArrayBuffer* buffer, unsigned new_size);
 
 // Creates a WebArrayBuffer from a uint8 byte array
 blink::WebArrayBuffer CreateArrayBuffer(const uint8* data, unsigned data_size);
 
 // This function decodes unpadded 'base64url' encoded data, as described in
 // RFC4648 (http://www.ietf.org/rfc/rfc4648.txt) Section 5.
 // In Web Crypto, this type of encoding is only used inside JWK.
 bool Base64DecodeUrlSafe(const std::string& input, std::string* output);
 
+bool IsHashAlgorithm(blink::WebCryptoAlgorithmId alg_id);
+
 // Returns the "hash" param for an algorithm if it exists, otherwise returns
 // a null algorithm.
 blink::WebCryptoAlgorithm GetInnerHashAlgorithm(
     const blink::WebCryptoAlgorithm& algorithm);
 
 // Creates a WebCryptoAlgorithm without any parameters.
 CONTENT_EXPORT blink::WebCryptoAlgorithm CreateAlgorithm(
     blink::WebCryptoAlgorithmId id);
 
 // Creates an HMAC algorithm whose inner hash algorithm is determined by the
@@ skipping 44 matching lines @@
 // Creates an AES-GCM algorithm whose parameters struct is compatible with key
 // generation.
 blink::WebCryptoAlgorithm CreateAesGcmKeyGenAlgorithm(
     unsigned short key_length_bits);
 
 }  // namespace webcrypto
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_WEBCRYPTO_WEBCRYPTO_UTIL_H_