[webcrypto] Add raw symmetric key AES-KW wrap/unwrap for NSS.

content/renderer/webcrypto/shared_crypto.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_RENDERER_WEBCRYPTO_SHARED_CRYPTO_H_
 #define CONTENT_RENDERER_WEBCRYPTO_SHARED_CRYPTO_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "content/common/content_export.h"
@@ skipping 113 matching lines @@
                     const CryptoData& data,
                     bool* signature_match);
 
 CONTENT_EXPORT Status
     ImportKeyJwk(const CryptoData& key_data,
                  const blink::WebCryptoAlgorithm& algorithm_or_null,
                  bool extractable,
                  blink::WebCryptoKeyUsageMask usage_mask,
                  blink::WebCryptoKey* key);
 
+CONTENT_EXPORT Status
+    WrapKey(blink::WebCryptoKeyFormat format,
+            const blink::WebCryptoKey& wrapping_key,
+            const blink::WebCryptoKey& key_to_wrap,
+            const blink::WebCryptoAlgorithm& wrapping_algorithm,
+            blink::WebArrayBuffer* buffer);
+
+CONTENT_EXPORT Status
+    UnwrapKey(blink::WebCryptoKeyFormat format,
+              const CryptoData& wrapped_key_data,
+              const blink::WebCryptoKey& wrapping_key,
+              const blink::WebCryptoAlgorithm& wrapping_algorithm,
+              const blink::WebCryptoAlgorithm& algorithm_or_null,
+              bool extractable,
+              blink::WebCryptoKeyUsageMask usage_mask,
+              blink::WebCryptoKey* key);
+
 }  // namespace webcrypto
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_WEBCRYPTO_SHARED_CRYPTO_H_