chrome/renderer/resources/extensions/platform_keys_custom_bindings.js

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // Custom binding for the platformKeys API.
   6
   7 var binding = require('binding').Binding.create('platformKeys');
   8 var SubtleCrypto = require('platformKeys.SubtleCrypto').SubtleCrypto;
   9 var getPublicKey = require('platformKeys.getPublicKey').getPublicKey;
  10 var internalAPI = require('platformKeys.internalAPI');
  11
  12 var keyModule = require('platformKeys.Key');
  13 var Key = keyModule.Key;
  14 var KeyType = keyModule.KeyType;
  15 var KeyUsage = keyModule.KeyUsage;
  16
  17 function createPublicKey(publicKeySpki, algorithm) {
  18   return new Key(KeyType.public, publicKeySpki, algorithm, [KeyUsage.verify],
  19                  true /* extractable */);
  20 }
  21
  22 function createPrivateKey(publicKeySpki, algorithm) {
  23   return new Key(KeyType.private, publicKeySpki, algorithm, [KeyUsage.sign],
  24                  false /* not extractable */);
  25 }
  26
  27 binding.registerCustomHook(function(api) {
  28   var apiFunctions = api.apiFunctions;
  29   var subtleCrypto = new SubtleCrypto('' /* tokenId */);
  30
  31   apiFunctions.setHandleRequest(
  32       'selectClientCertificates', function(details, callback) {
  33         internalAPI.selectClientCertificates(details, function(matches) {
  34           callback($Array.map(matches, function(match) {
  35             // internalAPI.selectClientCertificates returns publicExponent as
  36             // ArrayBuffer, but it should be a Uint8Array.
  37             if (match.keyAlgorithm.publicExponent) {
  38               match.keyAlgorithm.publicExponent =
  39                   new Uint8Array(match.keyAlgorithm.publicExponent);
  40             }
  41             return match;
  42           }));
  43         });
  44       });
  45
  46   apiFunctions.setHandleRequest(
  47       'subtleCrypto', function() { return subtleCrypto });
  48
  49   apiFunctions.setHandleRequest(
  50       'getKeyPair', function(cert, params, callback) {
  51         getPublicKey(cert, params, function(publicKey, algorithm) {
  52           if (chrome.runtime.lastError) {
  53             callback();
  54             return;
  55           }
  56           callback(createPublicKey(publicKey, algorithm),
  57                    createPrivateKey(publicKey, algorithm));
  58         });
  59       });
  60 });
  61
  62 exports.binding = binding.generate();