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1// Copyright 2014 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
5var utils = require('utils');
6
7/**
8 * Enum of possible key types (subset of WebCrypto.KeyType).
9 * @enum {string}
10 */
11var KeyType = {
12  public: 'public',
13  private: 'private'
14};
15
16/**
17 * Enum of possible key usages (subset of WebCrypto.KeyUsage).
18 * @enum {string}
19 */
20var KeyUsage = {
21  sign: 'sign',
22  verify: 'verify'
23};
24
25/**
26 * Implementation of WebCrypto.Key used in enterprise.platformKeys.
27 * @param {KeyType} type The type of the new key.
28 * @param {ArrayBuffer} publicKeySpki The Subject Public Key Info in DER
29 *   encoding.
30 * @param {KeyAlgorithm} algorithm The algorithm identifier.
31 * @param {KeyUsage[]} usages The allowed key usages.
32 * @param {boolean} extractable Whether the key is extractable.
33 * @constructor
34 */
35var KeyImpl = function(type, publicKeySpki, algorithm, usages, extractable) {
36  this.type = type;
37  this.spki = publicKeySpki;
38  this.algorithm = algorithm;
39  this.usages = usages;
40  this.extractable = extractable;
41};
42
43var KeyBase = function() {};
44
45Object.defineProperty(KeyBase.prototype, 'algorithm', {
46  enumerable: true,
47  get: function() {
48    return utils.deepCopy(privates(this).impl.algorithm);
49  }
50});
51
52var Key = utils.expose(
53    'Key',
54    KeyImpl,
55    {superclass: KeyBase, readonly: ['extractable', 'type', 'usages']});
56
57/**
58 * Returns |key|'s Subject Public Key Info. Throws an exception if |key| is not
59 * a valid Key object.
60 * @param {Key} key
61 * @return {ArrayBuffer} The Subject Public Key Info in DER encoding of |key|.
62 */
63function getSpki(key) {
64  if (!privates(key))
65    throw new Error('Invalid key object.');
66  var keyImpl = privates(key).impl;
67  if (!keyImpl || !keyImpl.spki)
68    throw new Error('Invalid key object.');
69  return keyImpl.spki;
70}
71
72exports.Key = Key;
73exports.KeyType = KeyType;
74exports.KeyUsage = KeyUsage;
75exports.getSpki = getSpki;
76