Implement HKDF for webcrypto

content/child/webcrypto/openssl/sha_openssl.cc

 // 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.
 
 #include <vector>
 #include <openssl/evp.h>
 #include <openssl/sha.h>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
@@ skipping 55 matching lines @@
     return FinishInternal(hash_buffer, &hash_buffer_size);
   }
 
  private:
   Status Init() {
     if (initialized_)
       return Status::Success();
 
     const EVP_MD* digest_algorithm = GetDigest(algorithm_id_);
     if (!digest_algorithm)
-      return Status::ErrorUnexpected();
+      return Status::ErrorUnsupported();
 
     if (!digest_context_.get())
       return Status::OperationError();
 
     if (!EVP_DigestInit_ex(digest_context_.get(), digest_algorithm, NULL))
       return Status::OperationError();
 
     initialized_ = true;
     return Status::Success();
   }
@@ skipping 44 matching lines @@
 }
 
 scoped_ptr<blink::WebCryptoDigestor> CreatePlatformDigestor(
     blink::WebCryptoAlgorithmId algorithm) {
   return scoped_ptr<blink::WebCryptoDigestor>(new DigestorOpenSsl(algorithm));
 }
 
 }  // namespace webcrypto
 
 }  // namespace content