enterprise.platformKeys: Copy-on-read the 'algorithm' member of Key objects.

chrome/renderer/resources/extensions/enterprise_platform_keys/subtle_crypto.js

 // 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.
 
 var utils = require('utils');
 var internalAPI = require('enterprise.platformKeys.internalAPI');
 var intersect = require('enterprise.platformKeys.utils').intersect;
 var KeyPair = require('enterprise.platformKeys.KeyPair').KeyPair;
 var keyModule = require('enterprise.platformKeys.Key');
 var getSpki = keyModule.getSpki;
@@ skipping 84 matching lines @@
       throw CreateDataError();
     }
     var normalizedAlgorithmParameters =
         normalizeAlgorithm(algorithm, 'GenerateKey');
     if (!normalizedAlgorithmParameters) {
       // TODO(pneubeck): It's not clear from the WebCrypto spec which error to
       // throw here.
       throw CreateSyntaxError();
     }
 
+    // normalizeAlgorithm returns an array, but publicExponent should be a
+    // Uint8Array.
+    normalizedAlgorithmParameters.publicExponent =
+        new Uint8Array(normalizedAlgorithmParameters.publicExponent);
+
     if (normalizedAlgorithmParameters.name !== 'RSASSA-PKCS1-v1_5' ||
         !equalsStandardPublicExponent(
             normalizedAlgorithmParameters.publicExponent)) {
       // Note: This deviates from WebCrypto.SubtleCrypto.
       throw CreateNotSupportedError();
     }
 
     internalAPI.generateKey(subtleCrypto.tokenId,
                             normalizedAlgorithmParameters.modulusLength,
                             function(spki) {
@@ skipping 56 matching lines @@
       // TODO(pneubeck): It should be possible to export to format 'jwk'.
       throw CreateNotSupportedError();
     }
   });
 };
 
 exports.SubtleCrypto =
     utils.expose('SubtleCrypto',
                  SubtleCryptoImpl,
                  {functions:['generateKey', 'sign', 'exportKey']});