[webcrypto] Validate JWK import of AES keys: key length must match algorithm.

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"
@@ skipping 74 matching lines @@
 
 Status Status::ErrorJwkRsaPrivateKeyUnsupported() {
   return Status("JWK RSA key contained \"d\" property: Private key import is "
                 "not yet supported");
 }
 
 Status Status::ErrorJwkUnrecognizedKty() {
   return Status("The JWK \"kty\" property was unrecognized");
 }
 
+Status Status::ErrorJwkIncorrectKeyLength() {
+  return Status("The JWK \"k\" property did not include the right length "
+                "of key data for the given algorithm.");
+}
+
 Status Status::ErrorImportEmptyKeyData() {
   return Status("No key data was provided");
 }
 
 Status Status::ErrorUnexpectedKeyType() {
   return Status("The key is not of the expected type");
 }
 
 Status Status::ErrorIncorrectSizeAesCbcIv() {
   return Status("The \"iv\" has an unexpected length -- must be 16 bytes");
@@ skipping 209 matching lines @@
       return 128;
     default:
       NOTREACHED();
       return 0;
   }
 }
 
 }  // namespace webcrypto
 
 }  // namespace content