[webcrypto] Add key generation for AES-GCM and AES-KW for NSS.

content/renderer/webcrypto/webcrypto_util.cc

 // Copyright 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.
 
 #include "content/renderer/webcrypto/webcrypto_util.h"
 
 #include "base/base64.h"
 #include "base/logging.h"
 #include "third_party/WebKit/public/platform/WebCryptoAlgorithm.h"
 #include "third_party/WebKit/public/platform/WebCryptoAlgorithmParams.h"
 
 namespace content {
 
 namespace webcrypto {
 
 namespace {
 
-blink::WebCryptoAlgorithm CreateAesKeyGenAlgorithm(
-    blink::WebCryptoAlgorithmId aes_alg_id,
-    unsigned short length) {
-  return blink::WebCryptoAlgorithm::adoptParamsAndCreate(
-      aes_alg_id, new blink::WebCryptoAesKeyGenParams(length));
-}
-
 bool IsHashAlgorithm(blink::WebCryptoAlgorithmId alg_id) {
   return alg_id == blink::WebCryptoAlgorithmIdSha1 ||
          alg_id == blink::WebCryptoAlgorithmIdSha224 ||
          alg_id == blink::WebCryptoAlgorithmIdSha256 ||
          alg_id == blink::WebCryptoAlgorithmIdSha384 ||
          alg_id == blink::WebCryptoAlgorithmIdSha512;
 }
 
 }  // namespace
 
@@ skipping 118 matching lines @@
       blink::WebCryptoAlgorithmIdAesCbc,
       new blink::WebCryptoAesGcmParams(Uint8VectorStart(iv),
                                        iv.size(),
                                        additional_data.size() != 0,
                                        Uint8VectorStart(additional_data),
                                        additional_data.size(),
                                        tag_length_bytes != 0,
                                        tag_length_bytes));
 }
 
-blink::WebCryptoAlgorithm CreateAesCbcKeyGenAlgorithm(
-    unsigned short key_length_bits) {
-  return CreateAesKeyGenAlgorithm(blink::WebCryptoAlgorithmIdAesCbc,
-                                  key_length_bits);
-}
-
-blink::WebCryptoAlgorithm CreateAesGcmKeyGenAlgorithm(
-    unsigned short key_length_bits) {
-  return CreateAesKeyGenAlgorithm(blink::WebCryptoAlgorithmIdAesGcm,
-                                  key_length_bits);
-}
-
 unsigned int ShaBlockSizeBytes(blink::WebCryptoAlgorithmId hash_id) {
   switch (hash_id) {
     case blink::WebCryptoAlgorithmIdSha1:
     case blink::WebCryptoAlgorithmIdSha224:
     case blink::WebCryptoAlgorithmIdSha256:
       return 64;
     case blink::WebCryptoAlgorithmIdSha384:
     case blink::WebCryptoAlgorithmIdSha512:
       return 128;
     default:
       NOTREACHED();
       return 0;
   }
 }
 
 }  // namespace webcrypto
 
 }  // namespace content