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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 = {};
var getStoredUserRules = function() {
var oldUserRuleString = localStorage.getItem(USER_RULE_KEY);
var oldUserRules = [];
if (oldUserRuleString) {
oldUserRules = JSON.parse(oldUserRuleString);
}
return oldUserRules;
};
var all_rules = new RuleSets();
var wr = chrome.webRequest;
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();
/*
for (var v in localStorage) {
log(DBUG, "localStorage["+v+"]: "+localStorage[v]);
}
var rs = all_rules.potentiallyApplicableRulesets("www.google.com");
for (r in rs) {
log(DBUG, rs[r].name +": "+ rs[r].active);
log(DBUG, rs[r].name +": "+ rs[r].default_state);
}
*/
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);
}
};
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 = {};
var domainBlacklist = {};
// redirect counter workaround
// TODO: Remove this code if they ever give us a real counter
var redirectCounter = {};
function onBeforeRequest(details) {
// get URL into canonical format
// todo: check that this is enough
var uri = new URI(details.url);
// 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 tmpuserinfo = uri.userinfo();
if (tmpuserinfo) {
uri.userinfo('');
}
var canonical_url = uri.toString();
if (details.url != canonical_url && tmpuserinfo === '') {
log(INFO, "Original url " + details.url +
" changed before processing to " + canonical_url);
}
if (canonical_url in urlBlacklist) {
return null;
}
if (details.type == "main_frame") {
activeRulesets.removeTab(details.tabId);
}
var rs = all_rules.potentiallyApplicableRulesets(uri.hostname());
// If no rulesets could apply, let's get out of here!
if (rs.length === 0) { return; }
if (redirectCounter[details.requestId] >= 8) {
log(NOTE, "Redirect counter hit for " + canonical_url);
urlBlacklist[canonical_url] = true;
var hostname = uri.hostname();
domainBlacklist[hostname] = true;
log(WARN, "Domain blacklisted " + hostname);
return null;
}
var newuristr = null;
for(var i = 0; i < rs.length; ++i) {
activeRulesets.addRulesetToTab(details.tabId, rs[i]);
if (rs[i].active && !newuristr) {
newuristr = rs[i].apply(canonical_url);
}
}
if (newuristr && tmpuserinfo !== "") {
// re-insert userpass info which was stripped temporarily
// while rules were applied
var finaluri = new URI(newuristr);
finaluri.userinfo(tmpuserinfo);
newuristr = finaluri.toString();
}
// 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 (newuristr) {
log(DBUG, "Redirecting from "+details.url+" to "+newuristr);
return {redirectUrl: newuristr};
} else {
return null;
}
}
// 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 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.
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.
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;
}
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");
}
function switchPlannerSmallHtml(tab_id) {
return switchPlannerRenderSections(tab_id, switchPlannerSmallHtmlSection);
}
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;
}
function switchPlannerDetailsHtml(tab_id) {
return switchPlannerRenderSections(tab_id, switchPlannerDetailsHtmlSection);
}
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;
}
function onCookieChanged(changeInfo) {
if (!changeInfo.removed && !changeInfo.cookie.secure) {
if (all_rules.shouldSecureCookie(changeInfo.cookie, false)) {
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);
}
}
}
function onBeforeRedirect(details) {
// Catch HTTPs -> HTTP redirect loops, ignoring about:blank, HTTPS 302s, etc.
if (details.redirectUrl.substring(0, 7) === "http://") {
if (details.requestId in redirectCounter) {
redirectCounter[details.requestId] += 1;
log(DBUG, "Got redirect id "+details.requestId+
": "+redirectCounter[details.requestId]);
} else {
redirectCounter[details.requestId] = 1;
}
}
}
wr.onBeforeRequest.addListener(onBeforeRequest, {urls: ["https://*/*", "http://*/*"]}, ["blocking"]);
// Try to catch redirect loops on URLs we've redirected to HTTPS.
wr.onBeforeRedirect.addListener(onBeforeRedirect, {urls: ["https://*/*"]});
// Add the small HTTPS Everywhere icon in the address bar.
// Note: We can't use any other hook (onCreated, onActivated, etc.) because Chrome resets the
// pageActions on URL change. We should strongly consider switching from pageAction to browserAction.
chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab) {
if (changeInfo.status === "loading") {
chrome.pageAction.show(tabId);
}
});
// Pre-rendered tabs / instant experiments sometimes skip onUpdated.
// See http://crbug.com/109557
chrome.tabs.onReplaced.addListener(function(addedTabId, removedTabId) {
chrome.tabs.get(addedTabId, function(tab) {
if(typeof(tab) === "undefined") {
log(DBUG, "Not a real tab. Skipping showing pageAction.");
} else {
chrome.pageAction.show(addedTabId);
}
});
});
// Listen for cookies set/updated and secure them if applicable. This function is async/nonblocking.
chrome.cookies.onChanged.addListener(onCookieChanged);
function disableSwitchPlannerFor(tabId) {
delete switchPlannerEnabledFor[tabId];
// Clear stored URL info.
delete switchPlannerInfo[tabId];
}
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)});
}
});
}
});
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