1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
/* gpgme.js - Javascript integration for gpgme
* Copyright (C) 2018 Bundesamt für Sicherheit in der Informationstechnik
*
* This file is part of GPGME.
*
* GPGME is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* GPGME is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses/>.
* SPDX-License-Identifier: LGPL-2.1+
*/
/**
* A connection port will be opened for each communication between gpgmejs and
* gnupg. It should be alive as long as there are additional messages to be
* expected.
*/
import { permittedOperations } from './permittedOperations'
import { gpgme_error } from "./Errors"
import { GPGME_Message } from "./Message";
/**
* A Connection handles the nativeMessaging interaction.
*/
export class Connection{
constructor(){
this.connect();
let me = this;
}
/**
* (Simple) Connection check.
* @returns {Boolean} true if the onDisconnect event has not been fired.
* Please note that the event listener of the port takes some time
* (5 ms seems enough) to react after the port is created. Then this will
* return undefined
*/
get isConnected(){
return this._isConnected;
}
/**
* Immediately closes the open port.
*/
disconnect() {
if (this._connection){
this._connection.disconnect();
}
}
/**
* Opens a nativeMessaging port.
*/
connect(){
if (this._isConnected === true){
gpgme_error('CONN_ALREADY_CONNECTED');
} else {
this._isConnected = true;
this._connection = chrome.runtime.connectNative('gpgmejson');
let me = this;
this._connection.onDisconnect.addListener(
function(){
me._isConnected = false;
}
);
}
}
/**
* Sends a message and resolves with the answer.
* @param {GPGME_Message} message
* @returns {Promise<Object>} the gnupg answer, or rejection with error
* information.
*/
post(message){
if (!this.isConnected){
return Promise.reject(gpgme_error('CONN_DISCONNECTED'));
}
if (!message || !message instanceof GPGME_Message){
return Promise.reject(gpgme_error('PARAM_WRONG'), message);
}
if (message.isComplete !== true){
return Promise.reject(gpgme_error('MSG_INCOMPLETE'));
}
let me = this;
return new Promise(function(resolve, reject){
let answer = new Answer(message);
let listener = function(msg) {
if (!msg){
me._connection.onMessage.removeListener(listener)
reject(gpgme_error('CONN_EMPTY_GPG_ANSWER'));
} else if (msg.type === "error"){
me._connection.onMessage.removeListener(listener);
reject(gpgme_error('GNUPG_ERROR', msg.msg));
} else {
let answer_result = answer.add(msg);
if (answer_result !== true){
me._connection.onMessage.removeListener(listener);
reject(answer_result);
}
if (msg.more === true){
me._connection.postMessage({'op': 'getmore'});
} else {
me._connection.onMessage.removeListener(listener)
resolve(answer.message);
}
}
};
me._connection.onMessage.addListener(listener);
if (permittedOperations[message.operation].pinentry){
return me._connection.postMessage(message.message);
} else {
return Promise.race([
me._connection.postMessage(message.message),
function(resolve, reject){
setTimeout(function(){
reject(gpgme_error('CONN_TIMEOUT'));
}, 5000);
}]).then(function(result){
return result;
}, function(reject){
if(!reject instanceof Error) {
return gpgme_error('GNUPG_ERROR', reject);
} else {
return reject;
}
});
}
});
}
};
/**
* A class for answer objects, checking and processing the return messages of
* the nativeMessaging communication.
* @param {String} operation The operation, to look up validity of returning messages
*/
class Answer{
constructor(message){
this.operation = message.operation;
this.expected = message.expected;
}
/**
* Add the information to the answer
* @param {Object} msg The message as received with nativeMessaging
* returns true if successfull, gpgme_error otherwise
*/
add(msg){
if (this._response === undefined){
this._response = {};
}
let messageKeys = Object.keys(msg);
let poa = permittedOperations[this.operation].answer;
if (messageKeys.length === 0){
return gpgme_error('CONN_UNEXPECTED_ANSWER');
}
for (let i= 0; i < messageKeys.length; i++){
let key = messageKeys[i];
switch (key) {
case 'type':
if ( msg.type !== 'error' && poa.type.indexOf(msg.type) < 0){
return gpgme_error('CONN_UNEXPECTED_ANSWER');
}
break;
case 'more':
break;
default:
//data should be concatenated
if (poa.data.indexOf(key) >= 0){
if (!this._response.hasOwnProperty(key)){
this._response[key] = '';
}
this._response[key] += msg[key];
}
//params should not change through the message
else if (poa.params.indexOf(key) >= 0){
if (!this._response.hasOwnProperty(key)){
this._response[key] = msg[key];
}
else if (this._response[key] !== msg[key]){
return gpgme_error('CONN_UNEXPECTED_ANSWER',msg[key]);
}
}
//infos may be json objects etc. Not yet defined.
// Pushing them into arrays for now
else if (poa.infos.indexOf(key) >= 0){
if (!this._response.hasOwnProperty(key)){
this._response[key] = [];
}
this._response.push(msg[key]);
}
else {
return gpgme_error('CONN_UNEXPECTED_ANSWER');
}
break;
}
}
return true;
}
/**
* @returns {Object} the assembled message, original data assumed to be
* (javascript-) strings
*/
get message(){
let keys = Object.keys(this._response);
let msg = {};
let poa = permittedOperations[this.operation].answer;
for (let i=0; i < keys.length; i++) {
if (poa.data.indexOf(keys[i]) >= 0
&& this._response.base64 === true
) {
msg[keys[i]] = atob(this._response[keys[i]]);
if (this.expected === 'base64'){
msg[keys[i]] = this._response[keys[i]];
} else {
msg[keys[i]] = decodeURIComponent(
atob(this._response[keys[i]]).split('').map(function(c) {
return '%' +
('00' + c.charCodeAt(0).toString(16)).slice(-2);
}).join(''));
}
} else {
msg[keys[i]] = this._response[keys[i]];
}
}
return msg;
}
}
|
