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           if (chrome.runtime.lastError) {
  35             callback([]);
  36             return;
  37           }
  38           callback($Array.map(matches, function(match) {
  39             // internalAPI.selectClientCertificates returns publicExponent as
  40             // ArrayBuffer, but it should be a Uint8Array.
  41             if (match.keyAlgorithm.publicExponent) {
  42               match.keyAlgorithm.publicExponent =
  43                   new Uint8Array(match.keyAlgorithm.publicExponent);
  44             }
  45             return match;
  46           }));
  47         });
  48       });
  49
  50   apiFunctions.setHandleRequest(
  51       'subtleCrypto', function() { return subtleCrypto });
  52
  53   apiFunctions.setHandleRequest(
  54       'getKeyPair', function(cert, params, callback) {
  55         getPublicKey(cert, params, function(publicKey, algorithm) {
  56           if (chrome.runtime.lastError) {
  57             callback();
  58             return;
  59           }
  60           callback(createPublicKey(publicKey, algorithm),
  61                    createPrivateKey(publicKey, algorithm));
  62         });
  63       });
  64 });
  65
  66 exports.binding = binding.generate();