forked from EFForg/https-everywhere
-
Notifications
You must be signed in to change notification settings - Fork 4
/
background.js
591 lines (523 loc) · 18.2 KB
/
background.js
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
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
"use strict";
/**
* Fetch and parse XML to be loaded as RuleSets.
*
* @param url: a relative URL to local XML
*/
function loadExtensionFile(url, returnType) {
var xhr = new XMLHttpRequest();
// Use blocking XHR to ensure everything is loaded by the time
// we return.
xhr.open("GET", chrome.extension.getURL(url), false);
xhr.send(null);
// Get file contents
if (xhr.readyState != 4) {
return;
}
if (returnType === 'xml') {
return xhr.responseXML;
}
return xhr.responseText;
}
// Rules are loaded here
var all_rules = new RuleSets(localStorage);
all_rules.addFromXml(loadExtensionFile('rules/default.rulesets', 'xml'));
var USER_RULE_KEY = 'userRules';
// Records which tabId's are active in the HTTPS Switch Planner (see
// devtools-panel.js).
var switchPlannerEnabledFor = {};
// Detailed information recorded when the HTTPS Switch Planner is active.
// Structure is:
// switchPlannerInfo[tabId]["rw"/"nrw"][resource_host][active_content][url];
// rw / nrw stand for "rewritten" versus "not rewritten"
var switchPlannerInfo = {};
// Is HTTPSe enabled, or has it been manually disabled by the user?
var isExtensionEnabled = true;
// Load prefs about whether http nowhere is on. Structure is:
// { httpNowhere: true/false }
var httpNowhereOn = false;
storage.get({httpNowhere: false}, function(item) {
httpNowhereOn = item.httpNowhere;
updateState();
});
chrome.storage.onChanged.addListener(function(changes, areaName) {
if (areaName === 'sync' || areaName === 'local') {
for (var key in changes) {
if (key === 'httpNowhere') {
httpNowhereOn = changes[key].newValue;
updateState();
}
}
}
});
chrome.tabs.onActivated.addListener(function() {
updateState();
});
chrome.windows.onFocusChanged.addListener(function() {
updateState();
});
chrome.webNavigation.onCompleted.addListener(function() {
updateState();
});
/**
* Load stored user rules
**/
var getStoredUserRules = function() {
var oldUserRuleString = localStorage.getItem(USER_RULE_KEY);
var oldUserRules = [];
if (oldUserRuleString) {
oldUserRules = JSON.parse(oldUserRuleString);
}
return oldUserRules;
};
var wr = chrome.webRequest;
/**
* Load all stored user rules
*/
var loadStoredUserRules = function() {
var rules = getStoredUserRules();
var i;
for (i = 0; i < rules.length; ++i) {
all_rules.addUserRule(rules[i]);
}
log('INFO', 'loaded ' + i + ' stored user rules');
};
loadStoredUserRules();
/**
* Set the icon color correctly
* inactive: extension is enabled, but no rules were triggered on this page.
* blocking: extension is in "block all HTTP requests" mode.
* active: extension is enabled and rewrote URLs on this page.
* disabled: extension is disabled from the popup menu.
*/
var updateState = function() {
chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
if (!tabs || tabs.length === 0) {
return;
}
var applied = activeRulesets.getRulesets(tabs[0].id)
var iconState = "inactive";
if (!isExtensionEnabled) {
iconState = "disabled";
} else if (httpNowhereOn) {
iconState = "blocking";
} else if (applied) {
iconState = "active";
}
chrome.browserAction.setIcon({
path: {
"38": "icons/icon-" + iconState + "-38.png"
}
});
chrome.browserAction.setTitle({
title: "HTTPS Everywhere (" + iconState + ")"
});
});
}
/**
* Adds a new user rule
* @param params: params defining the rule
* @param cb: Callback to call after success/fail
* */
var addNewRule = function(params, cb) {
if (all_rules.addUserRule(params)) {
// If we successfully added the user rule, save it in local
// storage so it's automatically applied when the extension is
// reloaded.
var oldUserRules = getStoredUserRules();
// TODO: there's a race condition here, if this code is ever executed from multiple
// client windows in different event loops.
oldUserRules.push(params);
// TODO: can we exceed the max size for storage?
localStorage.setItem(USER_RULE_KEY, JSON.stringify(oldUserRules));
cb(true);
} else {
cb(false);
}
};
/**
* Adds a listener for removed tabs
* */
function AppliedRulesets() {
this.active_tab_rules = {};
var that = this;
chrome.tabs.onRemoved.addListener(function(tabId, info) {
that.removeTab(tabId);
});
}
AppliedRulesets.prototype = {
addRulesetToTab: function(tabId, ruleset) {
if (tabId in this.active_tab_rules) {
this.active_tab_rules[tabId][ruleset.name] = ruleset;
} else {
this.active_tab_rules[tabId] = {};
this.active_tab_rules[tabId][ruleset.name] = ruleset;
}
},
getRulesets: function(tabId) {
if (tabId in this.active_tab_rules) {
return this.active_tab_rules[tabId];
}
return null;
},
removeTab: function(tabId) {
delete this.active_tab_rules[tabId];
}
};
// FIXME: change this name
var activeRulesets = new AppliedRulesets();
var urlBlacklist = new Set();
var domainBlacklist = new Set();
// redirect counter workaround
// TODO: Remove this code if they ever give us a real counter
var redirectCounter = {};
/**
* Called before a HTTP(s) request. Does the heavy lifting
* Cancels the request/redirects it to HTTPS. URL modification happens in here.
* @param details of the handler, see Chrome doc
* */
function onBeforeRequest(details) {
// If HTTPSe has been disabled by the user, return immediately.
if (!isExtensionEnabled) {
return;
}
var uri = document.createElement('a');
uri.href = details.url;
// Should the request be canceled?
var shouldCancel = (httpNowhereOn && uri.protocol === 'http:');
// Normalise hosts such as "www.example.com."
var canonical_host = uri.hostname;
if (canonical_host.charAt(canonical_host.length - 1) == ".") {
while (canonical_host.charAt(canonical_host.length - 1) == ".")
canonical_host = canonical_host.slice(0,-1);
uri.hostname = canonical_host;
}
// If there is a username / password, put them aside during the ruleset
// analysis process
var using_credentials_in_url = false;
if (uri.password || uri.username) {
using_credentials_in_url = true;
var tmp_user = uri.username;
var tmp_pass = uri.password;
uri.username = null;
uri.password = null;
}
var canonical_url = uri.href;
if (details.url != canonical_url && !using_credentials_in_url) {
log(INFO, "Original url " + details.url +
" changed before processing to " + canonical_url);
}
if (urlBlacklist.has(canonical_url)) {
return {cancel: shouldCancel};
}
if (details.type == "main_frame") {
activeRulesets.removeTab(details.tabId);
}
var potentiallyApplicable = all_rules.potentiallyApplicableRulesets(uri.hostname);
// If no rulesets could apply, let's get out of here!
if (potentiallyApplicable.size === 0) { return {cancel: shouldCancel}; }
if (redirectCounter[details.requestId] >= 8) {
log(NOTE, "Redirect counter hit for " + canonical_url);
urlBlacklist.add(canonical_url);
var hostname = uri.hostname;
domainBlacklist.add(hostname);
log(WARN, "Domain blacklisted " + hostname);
return {cancel: shouldCancel};
}
var newuristr = null;
for (let ruleset of potentiallyApplicable) {
activeRulesets.addRulesetToTab(details.tabId, ruleset);
if (ruleset.active && !newuristr) {
newuristr = ruleset.apply(canonical_url);
}
}
if (newuristr && using_credentials_in_url) {
// re-insert userpass info which was stripped temporarily
var uri_with_credentials = document.createElement('a');
uri_with_credentials.href = newuristr;
uri_with_credentials.username = tmp_user;
uri_with_credentials.password = tmp_pass;
newuristr = uri_with_credentials.href;
}
// In Switch Planner Mode, record any non-rewriteable
// HTTP URIs by parent hostname, along with the resource type.
if (switchPlannerEnabledFor[details.tabId] && uri.protocol !== "https:") {
writeToSwitchPlanner(details.type,
details.tabId,
canonical_host,
details.url,
newuristr);
}
if (httpNowhereOn) {
if (newuristr && newuristr.substring(0, 5) === "http:") {
// Abort early if we're about to redirect to HTTP in HTTP Nowhere mode
return {cancel: true};
}
}
if (newuristr) {
return {redirectUrl: newuristr};
} else {
return {cancel: shouldCancel};
}
}
// Map of which values for the `type' enum denote active vs passive content.
// https://developer.chrome.com/extensions/webRequest.html#event-onBeforeRequest
var activeTypes = { stylesheet: 1, script: 1, object: 1, other: 1};
// We consider sub_frame to be passive even though it can contain JS or flash.
// This is because code running in the sub_frame cannot access the main frame's
// content, by same-origin policy. This is true even if the sub_frame is on the
// same domain but different protocol - i.e. HTTP while the parent is HTTPS -
// because same-origin policy includes the protocol. This also mimics Chrome's
// UI treatment of insecure subframes.
var passiveTypes = { main_frame: 1, sub_frame: 1, image: 1, xmlhttprequest: 1};
/**
* Record a non-HTTPS URL loaded by a given hostname in the Switch Planner, for
* use in determining which resources need to be ported to HTTPS.
* (Reminder: Switch planner is the pro-tool enabled by switching into debug-mode)
*
* @param type: type of the resource (see activeTypes and passiveTypes arrays)
* @param tab_id: The id of the tab
* @param resource_host: The host of the original url
* @param resource_url: the original url
* @param rewritten_url: The url rewritten to
* */
function writeToSwitchPlanner(type, tab_id, resource_host, resource_url, rewritten_url) {
var rw = "rw";
if (rewritten_url == null)
rw = "nrw";
var active_content = 0;
if (activeTypes[type]) {
active_content = 1;
} else if (passiveTypes[type]) {
active_content = 0;
} else {
log(WARN, "Unknown type from onBeforeRequest details: `" + type + "', assuming active");
active_content = 1;
}
if (!switchPlannerInfo[tab_id]) {
switchPlannerInfo[tab_id] = {};
switchPlannerInfo[tab_id]["rw"] = {};
switchPlannerInfo[tab_id]["nrw"] = {};
}
if (!switchPlannerInfo[tab_id][rw][resource_host])
switchPlannerInfo[tab_id][rw][resource_host] = {};
if (!switchPlannerInfo[tab_id][rw][resource_host][active_content])
switchPlannerInfo[tab_id][rw][resource_host][active_content] = {};
switchPlannerInfo[tab_id][rw][resource_host][active_content][resource_url] = 1;
}
/**
* Return the number of properties in an object. For associative maps, this is
* their size.
* @param obj: object to calc the size for
* */
function objSize(obj) {
if (typeof obj == 'undefined') return 0;
var size = 0, key;
for (key in obj) {
if (obj.hasOwnProperty(key)) size++;
}
return size;
}
/**
* Make an array of asset hosts by score so we can sort them,
* presenting the most important ones first.
* */
function sortSwitchPlanner(tab_id, rewritten) {
var asset_host_list = [];
if (typeof switchPlannerInfo[tab_id] === 'undefined' ||
typeof switchPlannerInfo[tab_id][rewritten] === 'undefined') {
return [];
}
var tabInfo = switchPlannerInfo[tab_id][rewritten];
for (var asset_host in tabInfo) {
var ah = tabInfo[asset_host];
var activeCount = objSize(ah[1]);
var passiveCount = objSize(ah[0]);
var score = activeCount * 100 + passiveCount;
asset_host_list.push([score, activeCount, passiveCount, asset_host]);
}
asset_host_list.sort(function(a,b){return a[0]-b[0];});
return asset_host_list;
}
/**
* Format the switch planner output for presentation to a user.
* */
function switchPlannerSmallHtmlSection(tab_id, rewritten) {
var asset_host_list = sortSwitchPlanner(tab_id, rewritten);
if (asset_host_list.length == 0) {
return "<b>none</b>";
}
var output = "";
for (var i = asset_host_list.length - 1; i >= 0; i--) {
var host = asset_host_list[i][3];
var activeCount = asset_host_list[i][1];
var passiveCount = asset_host_list[i][2];
output += "<b>" + host + "</b>: ";
if (activeCount > 0) {
output += activeCount + " active";
if (passiveCount > 0)
output += ", ";
}
if (passiveCount > 0) {
output += passiveCount + " passive";
}
output += "<br/>";
}
return output;
}
/**
* Create switch planner sections
* */
function switchPlannerRenderSections(tab_id, f) {
return "Unrewritten HTTP resources loaded from this tab (enable HTTPS on " +
"these domains and add them to HTTPS Everywhere):<br/>" +
f(tab_id, "nrw") +
"<br/>Resources rewritten successfully from this tab (update these " +
"in your source code):<br/>" +
f(tab_id, "rw");
}
/**
* Generate the small switch planner html content
* */
function switchPlannerSmallHtml(tab_id) {
return switchPlannerRenderSections(tab_id, switchPlannerSmallHtmlSection);
}
/**
* Generate a HTML link from urls in map
* map: the map containing the urls
* */
function linksFromKeys(map) {
if (typeof map == 'undefined') return "";
var output = "";
for (var key in map) {
if (map.hasOwnProperty(key)) {
output += "<a href='" + key + "'>" + key + "</a><br/>";
}
}
return output;
}
/**
* Generate the detailed html fot the switch planner
* */
function switchPlannerDetailsHtml(tab_id) {
return switchPlannerRenderSections(tab_id, switchPlannerDetailsHtmlSection);
}
/**
* Generate the detailed html fot the switch planner, by section
* */
function switchPlannerDetailsHtmlSection(tab_id, rewritten) {
var asset_host_list = sortSwitchPlanner(tab_id, rewritten);
var output = "";
for (var i = asset_host_list.length - 1; i >= 0; i--) {
var host = asset_host_list[i][3];
var activeCount = asset_host_list[i][1];
var passiveCount = asset_host_list[i][2];
output += "<b>" + host + "</b>: ";
if (activeCount > 0) {
output += activeCount + " active<br/>";
output += linksFromKeys(switchPlannerInfo[tab_id][rewritten][host][1]);
}
if (passiveCount > 0) {
output += "<br/>" + passiveCount + " passive<br/>";
output += linksFromKeys(switchPlannerInfo[tab_id][rewritten][host][0]);
}
output += "<br/>";
}
return output;
}
/**
* monitor cookie changes. Automatically convert them to secure cookies
* @param changeInfo Cookie changed info, see Chrome doc
* */
function onCookieChanged(changeInfo) {
if (!changeInfo.removed && !changeInfo.cookie.secure && isExtensionEnabled) {
if (all_rules.shouldSecureCookie(changeInfo.cookie)) {
var cookie = {name:changeInfo.cookie.name,
value:changeInfo.cookie.value,
path:changeInfo.cookie.path,
httpOnly:changeInfo.cookie.httpOnly,
expirationDate:changeInfo.cookie.expirationDate,
storeId:changeInfo.cookie.storeId,
secure: true};
// Host-only cookies don't set the domain field.
if (!changeInfo.cookie.hostOnly) {
cookie.domain = changeInfo.cookie.domain;
}
// The cookie API is magical -- we must recreate the URL from the domain and path.
if (changeInfo.cookie.domain[0] == ".") {
cookie.url = "https://www" + changeInfo.cookie.domain + cookie.path;
} else {
cookie.url = "https://" + changeInfo.cookie.domain + cookie.path;
}
// We get repeated events for some cookies because sites change their
// value repeatedly and remove the "secure" flag.
log(DBUG,
"Securing cookie " + cookie.name + " for " + changeInfo.cookie.domain + ", was secure=" + changeInfo.cookie.secure);
chrome.cookies.set(cookie);
}
}
}
/**
* handling redirects, breaking loops
* @param details details for the redirect (see chrome doc)
* */
function onBeforeRedirect(details) {
// Catch redirect loops (ignoring about:blank, etc. caused by other extensions)
var prefix = details.redirectUrl.substring(0, 5);
if (prefix === "http:" || prefix === "https") {
if (details.requestId in redirectCounter) {
redirectCounter[details.requestId] += 1;
log(DBUG, "Got redirect id "+details.requestId+
": "+redirectCounter[details.requestId]);
} else {
redirectCounter[details.requestId] = 1;
}
}
}
// Registers the handler for requests
// We listen to all HTTP hosts, because RequestFilter can't handle tons of url restrictions.
wr.onBeforeRequest.addListener(onBeforeRequest, {urls: ["http://*/*"]}, ["blocking"]);
// TODO: Listen only to the tiny subset of HTTPS hosts that we rewrite/downgrade.
var httpsUrlsWeListenTo = ["https://*/*"];
// See: https://developer.chrome.com/extensions/match_patterns
wr.onBeforeRequest.addListener(onBeforeRequest, {urls: httpsUrlsWeListenTo}, ["blocking"]);
// Try to catch redirect loops on URLs we've redirected to HTTPS.
wr.onBeforeRedirect.addListener(onBeforeRedirect, {urls: ["https://*/*"]});
// Listen for cookies set/updated and secure them if applicable. This function is async/nonblocking.
chrome.cookies.onChanged.addListener(onCookieChanged);
/**
* disable switch Planner
* @param tabId the Tab to disable for
*/
function disableSwitchPlannerFor(tabId) {
delete switchPlannerEnabledFor[tabId];
// Clear stored URL info.
delete switchPlannerInfo[tabId];
}
/**
* Enable switch planner for specific tab
* @param tabId the tab to enable it for
*/
function enableSwitchPlannerFor(tabId) {
switchPlannerEnabledFor[tabId] = true;
}
// Listen for connection from the DevTools panel so we can set up communication.
chrome.runtime.onConnect.addListener(function (port) {
if (port.name == "devtools-page") {
chrome.runtime.onMessage.addListener(function(message, sender, sendResponse){
var tabId = message.tabId;
var disableOnCloseCallback = function(port) {
log(DBUG, "Devtools window for tab " + tabId + " closed, clearing data.");
disableSwitchPlannerFor(tabId);
};
if (message.type === "enable") {
enableSwitchPlannerFor(tabId);
port.onDisconnect.addListener(disableOnCloseCallback);
} else if (message.type === "disable") {
disableSwitchPlannerFor(tabId);
} else if (message.type === "getSmallHtml") {
sendResponse({html: switchPlannerSmallHtml(tabId)});
}
});
}
});