https-everywhere/src/components/https-everywhere.js at master · myano/https-everywhere

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// LOG LEVELS ---

let VERB=1;

let DBUG=2;

let INFO=3;

let NOTE=4;

let WARN=5;

// PREFERENCE BRANCHES

let PREFBRANCH_ROOT=0;

let PREFBRANCH_RULE_TOGGLE=1;

// maps domain patterns (with at most one wildcard) to RuleSets

let https_domains = {};

// URLs we've given up on rewriting because of redirection loops

let https_everywhere_blacklist = {};

// domains for which there is at least one blacklisted URL

let https_blacklist_domains = {};

const CI = Components.interfaces;

const CC = Components.classes;

const CU = Components.utils;

const CR = Components.results;

const Ci = Components.interfaces;

const Cc = Components.classes;

const Cu = Components.utils;

const Cr = Components.results;

Cu.import("resource://gre/modules/Services.jsm");

Cu.import("resource://gre/modules/FileUtils.jsm");

const CP_SHOULDPROCESS = 4;

const SERVICE_CTRID = "@eff.org/https-everywhere;1";

const SERVICE_ID=Components.ID("{32c165b4-fe5e-4964-9250-603c410631b4}");

const SERVICE_NAME = "Encrypts your communications with a number of major websites";

const LLVAR = "LogLevel";

const IOS = CC["@mozilla.org/network/io-service;1"].getService(CI.nsIIOService);

const OS = CC['@mozilla.org/observer-service;1'].getService(CI.nsIObserverService);

const LOADER = CC["@mozilla.org/moz/jssubscript-loader;1"].getService(CI.mozIJSSubScriptLoader);

const _INCLUDED = {};

// NoScript uses this blob to include js constructs that stored in the chrome/

// directory, but are not attached to the Firefox UI (normally, js located

// there is attached to an Overlay and therefore is part of the UI).

// Reasons for this: things in components/ directory cannot be split into

// separate files; things in chrome/ can be

const INCLUDE = function(name) {

if (arguments.length > 1)

for (var j = 0, len = arguments.length; j < len; j++)

INCLUDE(arguments[j]);

else if (!_INCLUDED[name]) {

// we used to try/catch here, but that was less useful because it didn't

// produce line numbers for syntax errors

LOADER.loadSubScript("chrome://https-everywhere/content/code/"

+ name + ".js");

_INCLUDED[name] = true;

}

};

const WP_STATE_START = CI.nsIWebProgressListener.STATE_START;

const WP_STATE_STOP = CI.nsIWebProgressListener.STATE_STOP;

const WP_STATE_DOC = CI.nsIWebProgressListener.STATE_IS_DOCUMENT;

const WP_STATE_START_DOC = WP_STATE_START | WP_STATE_DOC;

const WP_STATE_RESTORING = CI.nsIWebProgressListener.STATE_RESTORING;

const LF_VALIDATE_ALWAYS = CI.nsIRequest.VALIDATE_ALWAYS;

const LF_LOAD_BYPASS_ALL_CACHES = CI.nsIRequest.LOAD_BYPASS_CACHE | CI.nsICachingChannel.LOAD_BYPASS_LOCAL_CACHE;

const NS_OK = 0;

const NS_BINDING_ABORTED = 0x804b0002;

const NS_BINDING_REDIRECTED = 0x804b0003;

const NS_ERROR_UNKNOWN_HOST = 0x804b001e;

const NS_ERROR_REDIRECT_LOOP = 0x804b001f;

const NS_ERROR_CONNECTION_REFUSED = 0x804b000e;

const NS_ERROR_NOT_AVAILABLE = 0x804b0111;

const LOG_CONTENT_BLOCK = 1;

const LOG_CONTENT_CALL = 2;

const LOG_CONTENT_INTERCEPT = 4;

const LOG_CHROME_WIN = 8;

const LOG_XSS_FILTER = 16;

const LOG_INJECTION_CHECK = 32;

const LOG_DOM = 64;

const LOG_JS = 128;

const LOG_LEAKS = 1024;

const LOG_SNIFF = 2048;

const LOG_CLEARCLICK = 4096;

const LOG_ABE = 8192;

const HTML_NS = "http://www.w3.org/1999/xhtml";

const WHERE_UNTRUSTED = 1;

const WHERE_TRUSTED = 2;

const ANYWHERE = 3;

const N_COHORTS = 1000;

const DUMMY_OBJ = {};

DUMMY_OBJ.wrappedJSObject = DUMMY_OBJ;

const DUMMY_FUNC = function() {};

const DUMMY_ARRAY = [];

const EARLY_VERSION_CHECK = !("nsISessionStore" in CI && typeof(/ /) === "object");

// This is probably obsolete since the switch to the channel.redirectTo API

const OBSERVER_TOPIC_URI_REWRITE = "https-everywhere-uri-rewrite";

// XXX: Better plan for this?

// We need it to exist to make our updates of ChannelReplacement.js easier.

var ABE = {

consoleDump: false,

log: function(str) {

https_everywhereLog(WARN, str);

}

};

function xpcom_generateQI(iids) {

var checks = [];

for each (var iid in iids) {

checks.push("CI." + iid.name + ".equals(iid)");

}

var src = checks.length

? "if (" + checks.join(" || ") + ") return this;\n"

: "";

return new Function("iid", src + "throw Components.results.NS_ERROR_NO_INTERFACE;");

}

function xpcom_checkInterfaces(iid,iids,ex) {

for (var j = iids.length; j-- >0;) {

if (iid.equals(iids[j])) return true;

}

throw ex;

}

INCLUDE('ChannelReplacement', 'IOUtil', 'HTTPSRules', 'HTTPS', 'Thread', 'ApplicableList');

Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");

// This is black magic for storing Expando data w/ an nsIDOMWindow

// See http://pastebin.com/qY28Jwbv ,

// https://developer.mozilla.org/en/XPCOM_Interface_Reference/nsIControllers

StorageController.prototype = {

QueryInterface: XPCOMUtils.generateQI(

[ Components.interfaces.nsISupports,

Components.interfaces.nsIController ]),

wrappedJSObject: null, // Initialized by constructor

supportsCommand: function (cmd) {return (cmd == this.command);},

isCommandEnabled: function (cmd) {return (cmd == this.command);},

onEvent: function(eventName) {return true;},

doCommand: function() {return true;}

};

function StorageController(command) {

this.command = command;

this.data = {};

this.wrappedJSObject = this;

}

/*var Controller = Class("Controller", XPCOM(CI.nsIController), {

init: function (command, data) {

this.command = command;

this.data = data;

supportsCommand: function (cmd) cmd === this.command

});*/

function HTTPSEverywhere() {

// Set up logging in each component:

HTTPS.log = HTTPSRules.log = RuleWriter.log = this.log = https_everywhereLog;

this.log = https_everywhereLog;

this.wrappedJSObject = this;

this.https_rules = HTTPSRules;

this.rw = RuleWriter; // currently used for some file IO helpers, though that

// should probably be refactored

this.INCLUDE=INCLUDE;

this.ApplicableList = ApplicableList;

this.browser_initialised = false; // the browser is completely loaded

this.prefs = this.get_prefs();

this.rule_toggle_prefs = this.get_prefs(PREFBRANCH_RULE_TOGGLE);

this.httpNowhereEnabled = this.prefs.getBoolPref("http_nowhere.enabled");

// We need to use observers instead of categories for FF3.0 for these:

// https://developer.mozilla.org/en/Observer_Notifications

// https://developer.mozilla.org/en/nsIObserverService.

// https://developer.mozilla.org/en/nsIObserver

// We also use the observer service to let other extensions know about URIs

// we rewrite.

this.obsService = CC["@mozilla.org/observer-service;1"]

.getService(Components.interfaces.nsIObserverService);

if(this.prefs.getBoolPref("globalEnabled")){

this.obsService.addObserver(this, "profile-before-change", false);

this.obsService.addObserver(this, "profile-after-change", false);

this.obsService.addObserver(this, "sessionstore-windows-restored", false);

this.obsService.addObserver(this, "browser:purge-session-history", false);

}

var pref_service = Components.classes["@mozilla.org/preferences-service;1"]

.getService(Components.interfaces.nsIPrefBranchInternal);

var branch = pref_service.QueryInterface(Components.interfaces.nsIPrefBranchInternal);

branch.addObserver("extensions.https_everywhere.enable_mixed_rulesets",

this, false);

branch.addObserver("security.mixed_content.block_active_content",

this, false);

return;

}

// nsIContentPolicy interface

// we use numeric constants for performance sake:

const TYPE_OTHER = 1;

const TYPE_SCRIPT = 2;

const TYPE_IMAGE = 3;

const TYPE_STYLESHEET = 4;

const TYPE_OBJECT = 5;

const TYPE_DOCUMENT = 6;

const TYPE_SUBDOCUMENT = 7;

const TYPE_REFRESH = 8;

const TYPE_XBL = 9;

const TYPE_PING = 10;

const TYPE_XMLHTTPREQUEST = 11;

const TYPE_OBJECT_SUBREQUEST = 12;

const TYPE_DTD = 13;

const TYPE_FONT = 14;

const TYPE_MEDIA = 15;

// --------------

// REJECT_SERVER = -3

// ACCEPT = 1

// Some of these types are known by arbitrary assertion at

// https://bugzilla.mozilla.org/show_bug.cgi?id=677643#c47

// TYPE_FONT was required to fix https://trac.torproject.org/projects/tor/ticket/4194

// TYPE_SUBDOCUMENT was required to fix https://trac.torproject.org/projects/tor/ticket/4149

// I have NO IDEA why JS won't let me use the constants above in defining this

const shouldLoadTargets = {

1 : true,

3 : true,

5 : true,

12 : true,

14 : true,

7 : true

};

In recent versions of Firefox and HTTPS Everywhere, the call stack for performing an HTTP -> HTTPS rewrite looks like this:

1. HTTPSEverywhere.observe() gets a callback with the "http-on-modify-request" topic, and the channel as a subject

1. HTTPSEverywhere.shouldIgnoreURI() checks for very quick reasons to ignore a

request, such as redirection loops, non-HTTP[S] URIs, and OCSP

2. HTTPS.replaceChannel()

3. HTTPSRules.rewrittenURI()

4. HTTPSRules.potentiallyApplicableRulesets uses <target host=""> elements to identify relevant rulesets

foreach RuleSet:

4. RuleSet.transformURI()

5. RuleSet.apply() does the tests and rewrites with RegExps, returning a string

4. RuleSet.transformURI() makes a new uri object for the destination string, if required

2. HTTPS.replaceChannel() calls channel.redirectTo() if a redirect is needed

In addition, the following other important tasks happen along the way:

HTTPSEverywhere.observe() finds a reference to the ApplicableList or alist that represents the toolbar context menu

HTTPS.replaceChannel() notices redirect loops (and used to do much more complex XPCOM API work in the NoScript-based past)

HTTPSRules.rewrittenURI() works around weird URI types like about: and http://user:pass@example.com/

and notifies the alist of what it should display for each ruleset

// This defines for Mozilla what stuff HTTPSEverywhere will implement.

// ChannelEventSink used to be necessary in order to handle redirects (eg

// HTTP redirects) correctly. It may now be obsolete? XXX

HTTPSEverywhere.prototype = {

prefs: null,

// properties required for XPCOM registration:

classDescription: SERVICE_NAME,

classID: SERVICE_ID,

contractID: SERVICE_CTRID,

_xpcom_factory: {

createInstance: function (outer, iid) {

if (outer != null)

throw Components.results.NS_ERROR_NO_AGGREGATION;

if (!HTTPSEverywhere.instance)

HTTPSEverywhere.instance = new HTTPSEverywhere();

return HTTPSEverywhere.instance.QueryInterface(iid);

QueryInterface: XPCOMUtils.generateQI(

[ Components.interfaces.nsISupports,

Components.interfaces.nsIModule,

Components.interfaces.nsIFactory ])

// [optional] an array of categories to register this component in.

_xpcom_categories: [

{

category: "app-startup",

// QueryInterface implementation, e.g. using the generateQI helper

QueryInterface: XPCOMUtils.generateQI(

[ Components.interfaces.nsIObserver,

Components.interfaces.nsISupports,

Components.interfaces.nsISupportsWeakReference,

Components.interfaces.nsIWebProgressListener,

Components.interfaces.nsIWebProgressListener2,

Components.interfaces.nsIChannelEventSink ]),

wrappedJSObject: null, // Initialized by constructor

getWeakReference: function () {

return Components.utils.getWeakReference(this);

// An "expando" is an attribute glued onto something. From NoScript.

getExpando: function(domWin, key) {

var c = domWin.controllers.getControllerForCommand("https-everywhere-storage");

try {

if (c) {

c = c.wrappedJSObject;

//this.log(DBUG, "Found a controller, returning data");

return c.data[key];

} else {

this.log(INFO, "No controller attached to " + domWin);

return null;

}

} catch(e) {

// Firefox 3.5

this.log(WARN,"exception in getExpando");

this.getExpando = this.getExpando_old;

this.setExpando = this.setExpando_old;

return this.getExpando_old(domWin, key, null);

}

setExpando: function(domWin, key, value) {

var c = domWin.controllers.getControllerForCommand("https-everywhere-storage");

try {

if (!c) {

this.log(DBUG, "Appending new StorageController for " + domWin);

c = new StorageController("https-everywhere-storage");

domWin.controllers.appendController(c);

} else {

c = c.wrappedJSObject;

}

c.data[key] = value;

} catch(e) {

this.log(WARN,"exception in setExpando");

this.getExpando = this.getExpando_old;

this.setExpando = this.setExpando_old;

this.setExpando_old(domWin, key, value);

}

// This method is straight out of NoScript... we fall back to it in FF 3.*?

getExpando_old: function(domWin, key, defValue) {

var domObject = domWin.document;

return domObject && domObject.__httpsEStorage && domObject.__httpsEStorage[key] ||

(defValue ? this.setExpando(domObject, key, defValue) : null);

setExpando_old: function(domWin, key, value) {

var domObject = domWin.document;

if (!domObject) return null;

if (!domObject.__httpsEStorage) domObject.__httpsEStorage = {};

if (domObject.__httpsEStorage) domObject.__httpsEStorage[key] = value;

else this.log(WARN, "Warning: cannot set expando " + key + " to value " + value);

return value;

// We use onLocationChange to make a fresh list of rulesets that could have

// applied to the content in the current page (the "applicable list" is used

// for the context menu in the UI). This will be appended to as various

// content is embedded / requested by JavaScript.

onLocationChange: function(wp, req, uri) {

if (wp instanceof CI.nsIWebProgress) {

if (!this.newApplicableListForDOMWin(wp.DOMWindow))

this.log(WARN,"Something went wrong in onLocationChange");

} else {

this.log(WARN,"onLocationChange: no nsIWebProgress");

}

getWindowForChannel: function(channel) {

// Obtain an nsIDOMWindow from a channel

let loadContext;

try {

loadContext = channel.notificationCallbacks.getInterface(CI.nsILoadContext);

} catch(e) {

try {

loadContext = channel.loadGroup.notificationCallbacks.getInterface(CI.nsILoadContext);

} catch(e) {

this.log(NOTE, "No loadContext for " + channel.URI.spec);

return null;

}

let domWin = loadContext.associatedWindow;

if (!domWin) {

this.log(NOTE, "failed to get DOMWin for " + channel.URI.spec);

return null;

}

domWin = domWin.top;

return domWin;

// the lists get made when the urlbar is loading something new, but they

// need to be appended to with reference only to the channel

getApplicableListForChannel: function(channel) {

var domWin = this.getWindowForChannel(channel);

return this.getApplicableListForDOMWin(domWin, "on-modify-request w " + domWin);

newApplicableListForDOMWin: function(domWin) {

if (!domWin || !(domWin instanceof CI.nsIDOMWindow)) {

this.log(WARN, "Get alist without domWin");

return null;

}

var dw = domWin.top;

var alist = new ApplicableList(this.log,dw.document,dw);

this.setExpando(dw,"applicable_rules",alist);

return alist;

getApplicableListForDOMWin: function(domWin, where) {

if (!domWin || !(domWin instanceof CI.nsIDOMWindow)) {

//this.log(WARN, "Get alist without domWin");

return null;

}

var dw = domWin.top;

var alist= this.getExpando(dw,"applicable_rules",null);

if (alist) {

//this.log(DBUG,"get AL success in " + where);

return alist;

} else {

//this.log(DBUG, "Making new AL in getApplicableListForDOMWin in " + where);

alist = new ApplicableList(this.log,dw.document,dw);

this.setExpando(dw,"applicable_rules",alist);

}

return alist;

// These are the highest level heuristics for figuring out whether

// we should consider rewriting a URI. Everything here should be simple

// and avoid dependence on the ruleset library

shouldIgnoreURI: function(channel, alist) {

var uri = channel.URI;

// Ignore all non-http(s) requests?

if (!(uri.schemeIs("http") || uri.schemeIs("https"))) { return true; }

// If HTTP Nowhere is enabled, skip the rest of the shouldIgnoreURI checks

if (this.httpNowhereEnabled) {

return false;

}

// These are URIs we've seen redirecting back in loops after we redirect them

if (uri.spec in https_everywhere_blacklist) {

this.log(DBUG, "Avoiding blacklisted " + uri.spec);

if (alist) {

alist.breaking_rule(https_everywhere_blacklist[uri.spec]);

} else {

this.log(NOTE,"Failed to indicate breakage in content menu");

}

return true;

}

// OCSP (currently) needs to be HTTP to avoid cert validation loops

// though someone should rev the spec to allow opportunistic encryption

if ("allowSTS" in channel) {

// Firefox 32+ lets us infer whether this is an OCSP request

if (!channel.allowSTS) {

this.log(INFO, "Channel with HTTPS rewrites forbidden, deeming OCSP, for " + channel.URI.spec);

return true;

}

} else {

// Firefox <32 requires a more hacky estimate

// load the list opportunistically to speed startup & FF 32+

if (this.ocspList == undefined) { this.loadOCSPList(); }

if (this.ocspList.indexOf(uri.spec.replace(/\/$/,'')) !== -1) {

this.log(INFO, "Known ocsp request "+uri.spec);

return true;

}

return false;

loadOCSPList: function() {

try {

var loc = "chrome://https-everywhere/content/code/commonOCSP.json";

var file = CC["@mozilla.org/file/local;1"].createInstance(CI.nsILocalFile);

file.initWithPath(this.rw.chromeToPath(loc));

var data = this.rw.read(file);

this.ocspList = JSON.parse(data);

} catch(e) {

this.log(WARN, "Failed to load OCSP list: " + e);

this.ocspList = [];

}

observe: function(subject, topic, data) {

// Top level glue for the nsIObserver API

var channel = subject;

//this.log(VERB,"Got observer topic: "+topic);

if (topic == "http-on-modify-request") {

if (!(channel instanceof CI.nsIHttpChannel)) return;

this.log(DBUG,"Got http-on-modify-request: "+channel.URI.spec);

// lst is null if no window is associated (ex: some XHR)

var lst = this.getApplicableListForChannel(channel);

if (this.shouldIgnoreURI(channel, lst)) return;

HTTPS.replaceChannel(lst, channel, this.httpNowhereEnabled);

} else if (topic == "http-on-examine-response") {

this.log(DBUG, "Got http-on-examine-response @ "+ (channel.URI ? channel.URI.spec : '') );

HTTPS.handleSecureCookies(channel);

} else if (topic == "http-on-examine-merged-response") {

this.log(DBUG, "Got http-on-examine-merged-response ");

HTTPS.handleSecureCookies(channel);

} else if (topic == "cookie-changed") {

// Javascript can add cookies via document.cookie that are insecure.

if (data == "added" || data == "changed") {

// subject can also be an nsIArray! bleh.

try {

subject.QueryInterface(CI.nsIArray);

var elems = subject.enumerate();

while (elems.hasMoreElements()) {

var cookie = elems.getNext()

.QueryInterface(CI.nsICookie2);

if (!cookie.isSecure) {

HTTPS.handleInsecureCookie(cookie);

}

} catch(e) {

subject.QueryInterface(CI.nsICookie2);

if(!subject.isSecure) {

HTTPS.handleInsecureCookie(subject);

}

} else if (topic == "profile-before-change") {

this.log(INFO, "Got profile-before-change");

var catman = Components.classes["@mozilla.org/categorymanager;1"]

.getService(Components.interfaces.nsICategoryManager);

catman.deleteCategoryEntry("net-channel-event-sinks", SERVICE_CTRID, true);

Thread.hostRunning = false;

} else if (topic == "profile-after-change") {

this.log(DBUG, "Got profile-after-change");

if(this.prefs.getBoolPref("globalEnabled")){

OS.addObserver(this, "cookie-changed", false);

OS.addObserver(this, "http-on-modify-request", false);

OS.addObserver(this, "http-on-examine-merged-response", false);

OS.addObserver(this, "http-on-examine-response", false);

var dls = CC['@mozilla.org/docloaderservice;1']

.getService(CI.nsIWebProgress);

dls.addProgressListener(this, CI.nsIWebProgress.NOTIFY_LOCATION);

this.log(INFO,"ChannelReplacement.supported = "+ChannelReplacement.supported);

HTTPSRules.init();

Thread.hostRunning = true;

var catman = Components.classes["@mozilla.org/categorymanager;1"]

.getService(Components.interfaces.nsICategoryManager);

// hook on redirections (non persistent, otherwise crashes on 1.8.x)

catman.addCategoryEntry("net-channel-event-sinks", SERVICE_CTRID,

SERVICE_CTRID, false, true);

}

} else if (topic == "sessionstore-windows-restored") {

this.log(DBUG,"Got sessionstore-windows-restored");

this.maybeShowObservatoryPopup();

this.browser_initialised = true;

} else if (topic == "nsPref:changed") {

// If the user toggles the Mixed Content Blocker settings, reload the rulesets

// to enable/disable the mixedcontent ones

// this pref gets set to false and then true during FF 26 startup!

// so do nothing if we're being notified during startup

if (!this.browser_initialised)

return;

switch (data) {

case "security.mixed_content.block_active_content":

case "extensions.https_everywhere.enable_mixed_rulesets":

var p = CC["@mozilla.org/preferences-service;1"].getService(CI.nsIPrefBranch);

var val = p.getBoolPref("security.mixed_content.block_active_content");

this.log(INFO,"nsPref:changed for "+data + " to " + val);

HTTPSRules.init();

break;

}

} else if (topic == "browser:purge-session-history") {

// The list of rulesets that have been loaded from the sqlite DB

// constitutes a parallel history store, so we have to clear it.

this.log(DBUG, "History cleared, reloading HTTPSRules to avoid information leak.");

HTTPSRules.init();

}

return;

maybeShowObservatoryPopup: function() {

// Show the popup at most once. Users who enabled the Observatory before

// a version that would have shown it to them, don't need to see it

// again.

var ssl_observatory = CC["@eff.org/ssl-observatory;1"]

.getService(Components.interfaces.nsISupports)

.wrappedJSObject;

var shown = ssl_observatory.myGetBoolPref("popup_shown");

var enabled = ssl_observatory.myGetBoolPref("enabled");

var that = this;

var obs_popup_callback = function(result) {

if (result) that.log(INFO, "Got positive proxy test.");

else that.log(INFO, "Got negative proxy text.");

// We are now ready to show the popup in its most informative state

that.chrome_opener("chrome://https-everywhere/content/observatory-popup.xul");

};

if (!shown && !enabled)

ssl_observatory.registerProxyTestNotification(obs_popup_callback);

if (shown && enabled)

this.maybeCleanupObservatoryPrefs(ssl_observatory);

maybeCleanupObservatoryPrefs: function(ssl_observatory) {

// Recover from a past UI processing bug that would leave the Obsevatory

// accidentally disabled for some users

// https://trac.torproject.org/projects/tor/ticket/10728

var clean = ssl_observatory.myGetBoolPref("clean_config");

if (clean) return;

// unchanged: returns true if a pref has not been modified

var unchanged = function(p){return !ssl_observatory.prefs.prefHasUserValue("extensions.https_everywhere._observatory."+p)};

var cleanup_obsprefs_callback = function(tor_avail) {

// we only run this once

ssl_observatory.prefs.setBoolPref("extensions.https_everywhere._observatory.clean_config", true);

if (!tor_avail) {

// use_custom_proxy is the variable that is often false when it should be true;

if (!ssl_observatory.myGetBoolPref("use_custom_proxy")) {

// however don't do anything if any of the prefs have been set by the user

if (unchanged("alt_roots") && unchanged("self_signed") && unchanged ("send_asn") && unchanged("priv_dns")) {

ssl_observatory.prefs.setBoolPref("extensions.https_everywhere._observatory.use_custom_proxy", true);

}

ssl_observatory.registerProxyTestNotification(cleanup_obsprefs_callback);

getExperimentalFeatureCohort: function() {

// This variable is used for gradually turning on features for testing and

// scalability purposes. It is a random integer [0,N_COHORTS) generated

// once and stored thereafter.

// This is not currently used/called in the development branch

var cohort;

try {

cohort = this.prefs.getIntPref("experimental_feature_cohort");

} catch(e) {

cohort = Math.round(Math.random() * N_COHORTS);

this.prefs.setIntPref("experimental_feature_cohort", cohort);

}

return cohort;

// nsIChannelEventSink implementation

// XXX This was here for rewrites in the past. Do we still need it?

onChannelRedirect: function(oldChannel, newChannel, flags) {

const uri = newChannel.URI;

this.log(DBUG,"Got onChannelRedirect to "+uri.spec);

if (!(newChannel instanceof CI.nsIHttpChannel)) {

this.log(DBUG, newChannel + " is not an instance of nsIHttpChannel");

return;

}

var alist = this.juggleApplicableListsDuringRedirection(oldChannel, newChannel);

HTTPS.replaceChannel(alist, newChannel, this.httpNowhereEnabled);

juggleApplicableListsDuringRedirection: function(oldChannel, newChannel) {

// If the new channel doesn't yet have a list of applicable rulesets, start

// with the old one because that's probably a better representation of how

// secure the load process was for this page

var domWin = this.getWindowForChannel(oldChannel);

var old_alist = null;

if (domWin)

old_alist = this.getExpando(domWin,"applicable_rules", null);

domWin = this.getWindowForChannel(newChannel);

if (!domWin) return null;

var new_alist = this.getExpando(domWin,"applicable_rules", null);

if (old_alist && !new_alist) {

new_alist = old_alist;

this.setExpando(domWin,"applicable_rules",new_alist);

} else if (!new_alist) {

new_alist = new ApplicableList(this.log, domWin.document, domWin);

this.setExpando(domWin,"applicable_rules",new_alist);

}

return new_alist;

asyncOnChannelRedirect: function(oldChannel, newChannel, flags, callback) {

this.onChannelRedirect(oldChannel, newChannel, flags);

callback.onRedirectVerifyCallback(0);

get_prefs: function(prefBranch) {

if(!prefBranch) prefBranch = PREFBRANCH_ROOT;

// get our preferences branch object

// FIXME: Ugly hack stolen from https

var branch_name;

if(prefBranch == PREFBRANCH_RULE_TOGGLE)

branch_name = "extensions.https_everywhere.rule_toggle.";

else

branch_name = "extensions.https_everywhere.";

var o_prefs = false;

var o_branch = false;

// this function needs to be called from inside https_everywhereLog, so

// it needs to do its own logging...

var econsole = Components.classes["@mozilla.org/consoleservice;1"]

.getService(Components.interfaces.nsIConsoleService);

o_prefs = Components.classes["@mozilla.org/preferences-service;1"]

.getService(Components.interfaces.nsIPrefService);

if (!o_prefs)

{

econsole.logStringMessage("HTTPS Everywhere: Failed to get preferences-service!");

return false;

}

o_branch = o_prefs.getBranch(branch_name);

if (!o_branch)

{

econsole.logStringMessage("HTTPS Everywhere: Failed to get prefs branch!");

return false;

}

if(prefBranch == PREFBRANCH_ROOT) {

// make sure there's an entry for our log level

try {

o_branch.getIntPref(LLVAR);

} catch (e) {

econsole.logStringMessage("Creating new about:config https_everywhere.LogLevel variable");

o_branch.setIntPref(LLVAR, WARN);

}

return o_branch;

chrome_opener: function(uri, args) {

// we don't use window.open, because we need to work around TorButton's

// state control

args = args || 'chrome,centerscreen';

return CC['@mozilla.org/appshell/window-mediator;1']

.getService(CI.nsIWindowMediator)

.getMostRecentWindow('navigator:browser')

.open(uri,'', args );

tab_opener: function(uri) {

var gb = CC['@mozilla.org/appshell/window-mediator;1']

.getService(CI.nsIWindowMediator)

.getMostRecentWindow('navigator:browser')

.gBrowser;

var tab = gb.addTab(uri);

gb.selectedTab = tab;

return tab;

toggleEnabledState: function() {

if (this.prefs.getBoolPref("globalEnabled")) {

try {

this.obsService.removeObserver(this, "profile-before-change");

this.obsService.removeObserver(this, "profile-after-change");

this.obsService.removeObserver(this, "sessionstore-windows-restored");

OS.removeObserver(this, "cookie-changed");

OS.removeObserver(this, "http-on-modify-request");

OS.removeObserver(this, "http-on-examine-merged-response");

OS.removeObserver(this, "http-on-examine-response");

var catman = CC["@mozilla.org/categorymanager;1"]

.getService(CI.nsICategoryManager);

catman.deleteCategoryEntry("net-channel-event-sinks",

SERVICE_CTRID, true);

var dls = CC['@mozilla.org/docloaderservice;1']

.getService(CI.nsIWebProgress);

dls.removeProgressListener(this);

this.prefs.setBoolPref("globalEnabled", false);

} catch(e) {

this.log(WARN, "Couldn't remove observers: " + e);

}

} else {

try {

this.obsService.addObserver(this, "profile-before-change", false);

this.obsService.addObserver(this, "profile-after-change", false);

this.obsService.addObserver(this, "sessionstore-windows-restored", false);

OS.addObserver(this, "cookie-changed", false);

OS.addObserver(this, "http-on-modify-request", false);

OS.addObserver(this, "http-on-examine-merged-response", false);

OS.addObserver(this, "http-on-examine-response", false);

var dls = CC['@mozilla.org/docloaderservice;1']

.getService(CI.nsIWebProgress);

dls.addProgressListener(this, CI.nsIWebProgress.NOTIFY_LOCATION);

this.log(INFO,

"ChannelReplacement.supported = "+ChannelReplacement.supported);

if (!Thread.hostRunning) {

Thread.hostRunning = true;

}

var catman = CC["@mozilla.org/categorymanager;1"]

.getService(CI.nsICategoryManager);

// hook on redirections (non persistent, otherwise crashes on 1.8.x)

catman.addCategoryEntry("net-channel-event-sinks", SERVICE_CTRID,

SERVICE_CTRID, false, true);

HTTPSRules.init();

this.prefs.setBoolPref("globalEnabled", true);

} catch(e) {

this.log(WARN, "Couldn't add observers: " + e);

}

toggleHttpNowhere: function() {

let prefService = Services.prefs;

let thisBranch =

prefService.getBranch("extensions.https_everywhere.http_nowhere.");

let securityBranch = prefService.getBranch("security.");

// Whether cert is treated as invalid when OCSP connection fails

let OCSP_REQUIRED = "OCSP.require";

// Branch to save original settings

let ORIG_OCSP_REQUIRED = "orig.ocsp.required";

if (thisBranch.getBoolPref("enabled")) {

// Restore original OCSP settings. TODO: What if user manually edits

// these while HTTP Nowhere is enabled?

let origOcspRequired = thisBranch.getBoolPref(ORIG_OCSP_REQUIRED);

securityBranch.setBoolPref(OCSP_REQUIRED, origOcspRequired);

thisBranch.setBoolPref("enabled", false);

this.httpNowhereEnabled = false;

} else {

// Save original OCSP settings in HTTP Nowhere preferences branch.

let origOcspRequired = securityBranch.getBoolPref(OCSP_REQUIRED);

thisBranch.setBoolPref(ORIG_OCSP_REQUIRED, origOcspRequired);

// Disable OCSP enforcement

securityBranch.setBoolPref(OCSP_REQUIRED, false);

thisBranch.setBoolPref("enabled", true);

this.httpNowhereEnabled = true;

}

};

var prefs = 0;

var econsole = 0;

function https_everywhereLog(level, str) {

if (prefs == 0) {

prefs = HTTPSEverywhere.instance.get_prefs();

econsole = Components.classes["@mozilla.org/consoleservice;1"]

.getService(Components.interfaces.nsIConsoleService);

}

try {

var threshold = prefs.getIntPref(LLVAR);

} catch (e) {

econsole.logStringMessage( "HTTPS Everywhere: Failed to read about:config LogLevel");

threshold = WARN;

}

if (level >= threshold) {

dump("HTTPS Everywhere: "+str+"\n");

econsole.logStringMessage("HTTPS Everywhere: " +str);

}

/**

* XPCOMUtils.generateNSGetFactory was introduced in Mozilla 2 (Firefox 4).

* XPCOMUtils.generateNSGetModule is for Mozilla 1.9.2 (Firefox 3.6).

if (XPCOMUtils.generateNSGetFactory)

var NSGetFactory = XPCOMUtils.generateNSGetFactory([HTTPSEverywhere]);

else

var NSGetModule = XPCOMUtils.generateNSGetModule([HTTPSEverywhere]);

/* vim: set tabstop=4 expandtab: */

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