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Delta Between Two Patch Sets: lib/csp.js

Issue 29394585: Issue 5027 - Use updated webRequest API for WebSocket blocking (Closed)
Left Patch Set: Created March 24, 2017, 1 p.m.
Right Patch Set: change commit message, add chrome version to include.preload.js comments Created March 29, 2017, 12:04 p.m.
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1 /* 1 /*
2 * This file is part of Adblock Plus <https://adblockplus.org/>, 2 * This file is part of Adblock Plus <https://adblockplus.org/>,
3 * Copyright (C) 2006-2017 eyeo GmbH 3 * Copyright (C) 2006-2017 eyeo GmbH
4 * 4 *
5 * Adblock Plus is free software: you can redistribute it and/or modify 5 * Adblock Plus is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 3 as 6 * it under the terms of the GNU General Public License version 3 as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
8 * 8 *
9 * Adblock Plus is distributed in the hope that it will be useful, 9 * Adblock Plus is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details. 12 * GNU General Public License for more details.
13 * 13 *
14 * You should have received a copy of the GNU General Public License 14 * You should have received a copy of the GNU General Public License
15 * along with Adblock Plus. If not, see <http://www.gnu.org/licenses/>. 15 * along with Adblock Plus. If not, see <http://www.gnu.org/licenses/>.
16 */ 16 */
17 17
18 "use strict"; 18 "use strict";
19 19
20 const {defaultMatcher} = require("matcher"); 20 // Before Chrome 58, the webRequest API did not intercept WebSocket
21 const {BlockingFilter, RegExpFilter} = require("filterClasses"); 21 // connections (see https://crbug.com/129353). Hence we inject CSP headers,
22 const {getDecodedHostname} = require("url"); 22 // below, as a workaround.
23 const {checkWhitelisted} = require("whitelisting"); 23 if (!("WEBSOCKET" in chrome.webRequest.ResourceType))
24 {
25 const {defaultMatcher} = require("matcher");
26 const {BlockingFilter, RegExpFilter} = require("filterClasses");
27 const {getDecodedHostname} = require("url");
28 const {checkWhitelisted} = require("whitelisting");
24 29
25 chrome.webRequest.onHeadersReceived.addListener(details => 30 chrome.webRequest.onHeadersReceived.addListener(details =>
26 {
27 let hostname = getDecodedHostname(new URL(details.url));
28 let match = defaultMatcher.matchesAny("", RegExpFilter.typeMap.WEBSOCKET,
29 hostname, false, null, true);
30 if (match instanceof BlockingFilter &&
31 !checkWhitelisted(new ext.Page({id: details.tabId}),
32 ext.getFrame(details.tabId, details.frameId)))
33 { 31 {
34 details.responseHeaders.push({ 32 let hostname = getDecodedHostname(new URL(details.url));
35 name: "Content-Security-Policy", 33 let match = defaultMatcher.matchesAny("", RegExpFilter.typeMap.WEBSOCKET,
36 // We're blocking WebSockets here by adding a connect-src restriction 34 hostname, false, null, true);
37 // since the Chrome extension API does not allow us to intercept them. 35 if (match instanceof BlockingFilter &&
38 // https://bugs.chromium.org/p/chromium/issues/detail?id=129353 36 !checkWhitelisted(new ext.Page({id: details.tabId}),
39 // 37 ext.getFrame(details.tabId, details.frameId)))
40 // We also need the frame-src and object-src restrictions since CSPs are 38 {
41 // not inherited from the parent for documents with data: and blob: URLs. 39 details.responseHeaders.push({
42 // https://bugs.chromium.org/p/chromium/issues/detail?id=513860 40 name: "Content-Security-Policy",
43 // 41 // We're blocking WebSockets here by adding a connect-src restriction
44 // We must use the deprecated child-src directive instead of worker-src 42 // since the Chrome extension API does not allow us to intercept them.
45 // since that's not supported yet (as of Chrome 56.) 43 // https://bugs.chromium.org/p/chromium/issues/detail?id=129353
46 // 44 //
47 // "http:" also includes "https:" implictly. 45 // We also need the frame-src and object-src restrictions since CSPs
48 // https://www.chromestatus.com/feature/6653486812889088 46 // are not inherited from the parent for documents with data: and blob:
49 value: "connect-src http:; child-src http:; frame-src http:; object-src ht tp:" 47 // URLs, see https://crbug.com/513860.
50 }); 48 //
51 return {responseHeaders: details.responseHeaders}; 49 // We must use the deprecated child-src directive instead of worker-src
52 } 50 // since that's not supported yet (as of Chrome 56.)
53 }, { 51 //
54 urls: ["http://*/*", "https://*/*"], 52 // "http:" also includes "https:" implictly.
55 // We must also intercept script requests since otherwise Web Workers can 53 // https://www.chromestatus.com/feature/6653486812889088
56 // be abused to execute scripts for which our Content Security Policy 54 value: "connect-src http:; child-src http:; frame-src http:; object-src http:"
57 // won't be injected. 55 });
58 // https://github.com/gorhill/uBO-Extra/issues/19 56 return {responseHeaders: details.responseHeaders};
59 types: ["main_frame", "sub_frame", "script"] 57 }
60 }, ["blocking", "responseHeaders"]); 58 }, {
59 urls: ["http://*/*", "https://*/*"],
60 // We must also intercept script requests since otherwise Web Workers can
61 // be abused to execute scripts for which our Content Security Policy
62 // won't be injected.
63 // https://github.com/gorhill/uBO-Extra/issues/19
64 types: ["main_frame", "sub_frame", "script"]
65 }, ["blocking", "responseHeaders"]);
66 }
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