[webcrypto] JWK: Updated import(ext, key_ops) and added export of symmetric keys

content/renderer/webcrypto/platform_crypto_nss.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 "content/renderer/webcrypto/platform_crypto.h"
 
 #include <cryptohi.h>
 #include <pk11pub.h>
 #include <sechash.h>
 
@@ skipping 1172 matching lines @@
   crypto::ScopedPK11SymKey unwrapped_key(PK11_UnwrapSymKey(wrapping_key->key(),
                                                            CKM_NSS_AES_KEY_WRAP,
                                                            param_item.get(),
                                                            &cipher_text,
                                                            mechanism,
                                                            flags,
                                                            plaintext_length));
   if (!unwrapped_key)
     return Status::Error();
 
+  blink::WebCryptoKeyAlgorithm key_algorithm;
+  if (!CreateSecretKeyAlgorithm(algorithm, plaintext_length, &key_algorithm))
+    return Status::ErrorUnexpected();
+
   *key = blink::WebCryptoKey::create(new SymKey(unwrapped_key.Pass()),
                                      blink::WebCryptoKeyTypeSecret,
                                      extractable,
-                                     algorithm,
+                                     key_algorithm,

[eroman, 2014/03/04 02:55:14]

Not sure I understand this change --> wouldn't it have failed compile without
this?

Is this change an artifact of basing on an uncommitted git branch?

(The change itself looks good, just trying to understand why it is here)

[padolph, 2014/03/04 17:38:20]

Yes, it's an artifact of my workflow. This is a fix for a compile bug from
another git branch, upon which this branch is based. Sorry for the confusion.

                                      usage_mask);
   return Status::Success();
 }
 
 }  // namespace platform
 
 }  // namespace webcrypto
 
 }  // namespace content