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Issue 29680696: [$csp4 adblockpluschrome] Issue 5241 - Add support for Content Security Policy filters (Closed)
Patch Set: Addressed Sebastian's feedback Created March 19, 2018, 2:40 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-present eyeo GmbH 3 * Copyright (C) 2006-present 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 // The webRequest API doesn't support WebSocket connection blocking in Microsoft 20 const {defaultMatcher} = require("matcher");
21 // Edge and versions of Chrome before 58. Therefore for those we inject CSP 21 const {RegExpFilter, WhitelistFilter} = require("filterClasses");
22 // headers below as a workaround. See https://crbug.com/129353 and 22 const {extractHostFromFrame, getDecodedHostname,
23 // https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/10297376 / 23 isThirdParty, stringifyURL} = require("url");
24 if (!browser.webRequest.ResourceType || 24 const {checkWhitelisted} = require("whitelisting");
25 !("WEBSOCKET" in browser.webRequest.ResourceType)) 25 const {FilterNotifier} = require("filterNotifier");
26 const devtools = require("devtools");
27
28 const {typeMap} = RegExpFilter;
29
30 browser.webRequest.onHeadersReceived.addListener(details =>
26 { 31 {
27 const {defaultMatcher} = require("matcher"); 32 let url = new URL(details.url);
28 const {BlockingFilter, RegExpFilter} = require("filterClasses"); 33 let urlString = stringifyURL(url);
29 const {getDecodedHostname} = require("url"); 34 let parentFrame = details.parentFrameId != -1 &&
Sebastian Noack 2018/03/19 22:25:12 Nit: ext.getFrame(details.tabId, -1) just returns
kzar 2018/03/20 09:02:31 Done.
30 const {checkWhitelisted} = require("whitelisting"); 35 ext.getFrame(details.tabId, details.parentFrameId);
36 let hostname = extractHostFromFrame(parentFrame) || getDecodedHostname(url);
37 let thirdParty = isThirdParty(url, hostname);
31 38
32 browser.webRequest.onHeadersReceived.addListener(details => 39 let cspMatch = defaultMatcher.matchesAny(urlString, typeMap.CSP, hostname,
40 thirdParty, null, false);
41 if (cspMatch)
33 { 42 {
34 let hostname = getDecodedHostname(new URL(details.url)); 43 let page = new ext.Page({id: details.tabId, url: details.url});
35 let match = defaultMatcher.matchesAny("", RegExpFilter.typeMap.WEBSOCKET, 44 let frame = ext.getFrame(details.tabId, details.frameId);
36 hostname, false, null, true); 45
37 if (match instanceof BlockingFilter && 46 if (checkWhitelisted(page, frame))
38 !checkWhitelisted(new ext.Page({id: details.tabId}), 47 return;
39 ext.getFrame(details.tabId, details.frameId))) 48
49 // To avoid an extra matchesAny for the common case we assumed no
50 // $genericblock filters applied when searching for a matching $csp filter.
51 // We must now pay the price by first checking for a $genericblock filter
52 // and if necessary that our $csp filter is specific.
53 let specificOnly = checkWhitelisted(page, frame, typeMap.GENERICBLOCK);
Sebastian Noack 2018/03/19 22:25:12 checkWhitelisted() returns a filter object (or nul
kzar 2018/03/20 09:02:31 Done.
54 if (specificOnly)
40 { 55 {
41 details.responseHeaders.push({ 56 cspMatch = defaultMatcher.matchesAny(urlString, typeMap.CSP, hostname,
42 name: "Content-Security-Policy", 57 thirdParty, null, specificOnly);
43 // We're blocking WebSockets here by adding a connect-src restriction 58 if (!cspMatch)
44 // since the Chrome extension API does not allow us to intercept them. 59 return;
45 // https://bugs.chromium.org/p/chromium/issues/detail?id=129353
46 //
47 // We also need the frame-src and object-src restrictions since CSPs
48 // are not inherited from the parent for documents with data: and blob:
49 // URLs, see https://crbug.com/513860.
50 //
51 // We must use the deprecated child-src directive instead of worker-src
52 // since that's not supported yet (as of Chrome 56.)
53 //
54 // "http:" also includes "https:" implictly.
55 // https://www.chromestatus.com/feature/6653486812889088
56 value: "connect-src http:; child-src http:; " +
57 "frame-src http:; object-src http:"
58 });
59 return {responseHeaders: details.responseHeaders};
60 } 60 }
61 }, { 61
62 urls: ["http://*/*", "https://*/*"], 62 devtools.logRequest(page, urlString, "CSP", hostname, thirdParty, null,
63 // We must also intercept script requests since otherwise Web Workers can 63 specificOnly, cspMatch);
64 // be abused to execute scripts for which our Content Security Policy 64
65 // won't be injected. 65 if (cspMatch instanceof WhitelistFilter)
66 // https://github.com/gorhill/uBO-Extra/issues/19 66 return;
67 types: ["main_frame", "sub_frame", "script"] 67
68 }, ["blocking", "responseHeaders"]); 68 FilterNotifier.emit("filter.hitCount", cspMatch, 0, 0, page);
Sebastian Noack 2018/03/19 22:25:12 This seems inconsistent. For requests, we emit fil
kzar 2018/03/20 09:02:31 Done.
69 } 69 details.responseHeaders.push({
70 name: "Content-Security-Policy",
71 value: cspMatch.csp
72 });
73
74 return {responseHeaders: details.responseHeaders};
75 }
76 }, {
77 urls: ["http://*/*", "https://*/*"],
78 types: ["main_frame", "sub_frame"]
79 }, ["blocking", "responseHeaders"]);
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