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|
/*
* HTTPSDetect.js handles background Detection and http observation
*/
httpsfinder.Cookies = {};
httpsfinder_INCLUDE('Cookies', httpsfinder.Cookies);
var OS = Cc["@mozilla.org/observer-service;1"]
.getService(Ci.nsIObserverService);
////Not a great solution, but this is for problematic domains.
//Google image search over ssl is one, so we won't cache results there.
var cacheExempt = ["www.google.com", "translate.google.com", "encrypted.google.com"];
function QueryInterface (aIID){
if (aIID.equals(Ci.nsIObserver) || aIID.equals(Ci.nsISupports))
return this;
throw Cr.NS_NOINTERFACE;
}
//Watches HTTP responses, filters and calls Detection if needed
function observe (request,aTopic, aData){
if (aTopic == "http-on-examine-response") {
request.QueryInterface(Ci.nsIHttpChannel);
if(!httpsfinder.prefs.getBoolPref("enable"))
return;
if((request.responseStatus == 200 || request.responseStatus == 301
|| request.responseStatus == 304) && request.URI.scheme == "http")
var loadFlags = httpsfinder.Detect.getStringArrayOfLoadFlags(request.loadFlags);
else
return;
if(loadFlags.indexOf("LOAD_DOCUMENT_URI") != -1 && loadFlags.indexOf("LOAD_INITIAL_DOCUMENT_URI") != -1){
if(httpsfinder.Overlay.isWhitelisted(request.URI.host.toLowerCase())){
if(httpsfinder.debug)
dump("Canceling Detection on " + request.URI.host.toLowerCase() + ". Host is whitelisted\n");
return;
}
var browser = httpsfinder.Detect.getBrowserFromChannel(request);
if (browser == null){
if(httpsfinder.debug)
dump("httpsfinder browser cannot be found for channel\n");
return;
}
var host = request.URI.host.toLowerCase();
try{
if(httpsfinder.Detect.hostsMatch(browser.contentDocument.baseURIObject.host.toLowerCase(),host) &&
httpsfinder.results.goodSSL.indexOf(request.URI.host.toLowerCase()) != -1){
if(httpsfinder.debug)
dump("Canceling Detection on " + request.URI.host.toLowerCase() + ". Good SSL already cached for host.\n");
httpsfinder.Detect.handleCachedSSL(browser, request);
return;
}
}catch(e){
if(e.name == 'NS_ERROR_FAILURE')
dump("HTTPS Finder: cannot match URI to browser request.\n");
}
//Push to whitelist so we don't spam with multiple Detection requests - may be removed later depending on result
if(!httpsfinder.Overlay.isWhitelisted(host) &&
!httpsfinder.pbs.privateBrowsingEnabled){
httpsfinder.results.whitelist.push(host);
if(httpsfinder.debug){
dump("httpsfinder Blocking Detection on " + request.URI.host + " until OK response received\n");
dump("httpsfinder Starting HTTPS Detection for " + request.URI.asciiSpec + "\n");
}
}
httpsfinder.Detect.detectSSL(browser, request);
}
}
}
function register() {
OS.addObserver(httpsfinder.Detect, "http-on-examine-response", false);
}
function unregister () {
try{
OS.removeObserver(httpsfinder.Detect, "http-on-examine-response");
}
catch(e) {/* already removed if enabled pref is false */}
}
function hostsMatch (host1, host2){
//check domain name of page location and detected host. Slice after first . to ignore subdomains
if(host1.slice(host1.indexOf(".",0) + 1,host1.length) == host2.slice(host2.indexOf(".",0) + 1,host2.length))
return true;
else
return false;
}
//HTTPS Detection function - does HEAD falling back to GET, or just GET depending on user settings
function detectSSL (aBrowser, request){
var requestURL = request.URI.asciiSpec.replace("http://", "https://");
//If user preference specifies GET Detection only
if(!httpsfinder.prefs.getBoolPref("headfirst")){
var getReq = new XMLHttpRequest();
getReq.mozBackgroundRequest = true;
getReq.open('GET', requestURL, true);
getReq.channel.loadFlags |= Ci.nsIRequest.LOAD_BYPASS_CACHE;
getReq.onreadystatechange = function (aEvt) {
if (getReq.readyState == 4){
httpsfinder.Detect.handleDetectionResponse(aBrowser, getReq, requestURL);
}
};
getReq.send(null);
}
else{ //Otherwise, try HEAD and fall back to GET if necessary (default bahavior)
var headReq = new XMLHttpRequest();
headReq.mozBackgroundRequest = true;
headReq.open('HEAD', requestURL, true);
headReq.channel.loadFlags |= Ci.nsIRequest.LOAD_BYPASS_CACHE;
headReq.onreadystatechange = function (aEvt) {
if (headReq.readyState == 4){
if(headReq.status == 200 || headReq.status == 0 ||
(headReq.status != 405 && headReq.status != 403))
httpsfinder.Detect.handleDetectionResponse(aBrowser, headReq, requestURL);
else if(headReq.status == 405 || headReq.status == 403){
dump("httpsfinder Detection falling back to GET for " + requestURL + "\n");
var getReq = new XMLHttpRequest();
getReq.mozBackgroundRequest = true;
getReq.open('GET', requestURL, true);
getReq.channel.loadFlags |= Ci.nsIRequest.LOAD_BYPASS_CACHE;
getReq.onreadystatechange = function (aEvt) {
if (getReq.readyState == 4)
httpsfinder.Detect.handleDetectionResponse(aBrowser, getReq, requestURL);
};
getReq.send(null);
}
}
};
headReq.send(null);
}
}
//Get load flags for HTTP observer. We use these to filter normal http requests from page load requests
function getStringArrayOfLoadFlags (flags) {
var flagsArr = [];
//Look for the two load flags that indicate a page load (ignore others)
if (flags & Ci.nsIChannel.LOAD_DOCUMENT_URI)
flagsArr.push("LOAD_DOCUMENT_URI");
if (flags & Ci.nsIChannel.LOAD_INITIAL_DOCUMENT_URI)
flagsArr.push("LOAD_INITIAL_DOCUMENT_URI");
return flagsArr;
}
//Used by HTTP observer to match requests to tabs
function getBrowserFromChannel (aChannel) {
try {
var notificationCallbacks = aChannel.notificationCallbacks ? aChannel.notificationCallbacks : aChannel.loadGroup.notificationCallbacks;
if (!notificationCallbacks)
return null;
var domWin = notificationCallbacks.getInterface(Ci.nsIDOMWindow);
return gBrowser.getBrowserForDocument(domWin.top.document);
}
catch (e) {
return null;
}
}
//If good SSL has alread been found during this session, skip new Detection and use this function
function handleCachedSSL (aBrowser, request){
if(request.responseStatus != 200 && request.responseStatus != 301 && request.responseStatus != 302)
return;
if(!httpsfinder.Overlay.isWhitelisted(aBrowser.currentURI.host))
httpsfinder.Cookies.goodSSLFound(aBrowser.currentURI.host);
var nb = gBrowser.getNotificationBox(aBrowser);
var sslFoundButtons = [{
label: httpsfinder.strings.getString("httpsfinder.main.whitelist"),
accessKey: httpsfinder.strings.getString("httpsfinder.main.whitelistKey"),
popup: null,
callback: httpsfinder.Overlay.whitelistDomain
},{
label: httpsfinder.strings.getString("httpsfinder.main.noRedirect"),
accessKey: httpsfinder.strings.getString("httpsfinder.main.noRedirectKey"),
popup: null,
callback: httpsfinder.Overlay.redirectNotNow
},{
label: httpsfinder.strings.getString("httpsfinder.main.yesRedirect"),
accessKey: httpsfinder.strings.getString("httpsfinder.main.yesRedirectKey"),
popup: null,
callback: httpsfinder.Overlay.redirect
}];
if(httpsfinder.prefs.getBoolPref("autoforward"))
httpsfinder.Overlay.redirectAuto(aBrowser, request);
else if(httpsfinder.results.tempNoAlerts.indexOf(request.URI.host) == -1 &&
httpsfinder.prefs.getBoolPref("httpsfoundalert")){
nb.appendNotification(httpsfinder.strings.getString("httpsfinder.main.httpsFoundPrompt"),
"httpsfinder-https-found",'chrome://httpsfinder/skin/httpsAvailable.png',
nb.PRIORITY_INFO_HIGH, sslFoundButtons);
if(httpsfinder.prefs.getBoolPref("dismissAlerts"))
setTimeout(function(){
httpsfinder.removeNotification("httpsfinder-https-found")
},httpsfinder.prefs.getIntPref("alertDismissTime") * 1000, 'httpsfinder-https-found');
}
}
//Callback function for our HTTPS Detection request
function handleDetectionResponse (aBrowser, sslTest){
//Session whitelist host and return if cert is bad or status is not OK.
var host = sslTest.channel.URI.host.toLowerCase();
var request = sslTest.channel;
var cacheExempt = (httpsfinder.Detect.cacheExempt.indexOf(host) != -1) ? true : false;
if(cacheExempt){
if(httpsfinder.debug)
dump("httpsfinder removing " + host + " from whitelist (exempt from saving results on this host)\n");
httpsfinder.Overlay.removeFromWhitelist(null, aBrowser.contentDocument.baseURIObject.host.toLowerCase());
}
var Codes = [200, 301, 302, 0];
if(Codes.indexOf(sslTest.status) == -1 && httpsfinder.results.goodSSL.indexOf(host) == -1){
if(httpsfinder.debug)
dump("httpsfinder leaving " + host + " in whitelist (return status code " + sslTest.status + ")\n");
return;
}
else if(sslTest.status == 0 && !httpsfinder.Detect.testCertificate(request,sslTest.status, aBrowser) && httpsfinder.results.goodSSL.indexOf(host) == -1){
if(httpsfinder.debug)
dump("httpsfinder leaving " + host + " in whitelist (bad SSL certificate)\n");
return;
}
else if(!httpsfinder.Detect.testCertificate(request, null, null) && httpsfinder.results.goodSSL.indexOf(host) == -1){
if(httpsfinder.debug)
dump("httpsfinder leaving " + host + " in whitelist (bad SSL certificate)\n");
return;
}
else
httpsfinder.Overlay.removeFromWhitelist(null, host);
//If the code gets to this point, the HTTPS is good.
//Push host to good SSL list (remember result and skip repeat Detection)
if(httpsfinder.results.goodSSL.indexOf(host) == -1 && !httpsfinder.pbs.privateBrowsingEnabled){
if(httpsfinder.debug) dump("Pushing " + host + " to good SSL list\n");
httpsfinder.Overlay.removeFromWhitelist(null,host);
if(!cacheExempt)
httpsfinder.Detect.addHostToGoodSSLList(host);
}
else if(!httpsfinder.results.goodSSL.indexOf(aBrowser.contentDocument.baseURIObject.host.toLowerCase()) == -1
&& !httpsfinder.pbs.privateBrowsingEnabled){
var altHost = aBrowser.contentDocument.baseURIObject.host.toLowerCase();
if(httpsfinder.debug) dump("Pushing " + altHost + " to good SSL list.\n");
httpsfinder.Overlay.removeFromWhitelist(null,altHost);
if(!cacheExempt)
httpsfinder.Detect.addHostToGoodSSLList(altHost);
}
//Check setting and automatically enforce HTTPS
if(httpsfinder.prefs.getBoolPref("autoforward"))
httpsfinder.Overlay.redirectAuto(aBrowser, request);
//If auto-enforce is disabled, if host is not in tempNoAlerts (rule already saved)
//and HTTPS Found alerts are enabled, alert user of good HTTPS
else if(httpsfinder.results.tempNoAlerts.indexOf(request.URI.host) == -1 &&
httpsfinder.prefs.getBoolPref("httpsfoundalert")){
if(httpsfinder.Detect.hostsMatch(aBrowser.contentDocument.baseURIObject.host.toLowerCase(),host)){
var nb = gBrowser.getNotificationBox(aBrowser);
var sslFoundButtons = [{
label: httpsfinder.strings.getString("httpsfinder.main.whitelist"),
accessKey: httpsfinder.strings.getString("httpsfinder.main.whitelistKey"),
popup: null,
callback: httpsfinder.Overlay.whitelistDomain
},{
label: httpsfinder.strings.getString("httpsfinder.main.noRedirect"),
accessKey: httpsfinder.strings.getString("httpsfinder.main.noRedirectKey"),
popup: null,
callback: httpsfinder.Overlay.redirectNotNow
},{
label: httpsfinder.strings.getString("httpsfinder.main.yesRedirect"),
accessKey: httpsfinder.strings.getString("httpsfinder.main.yesRedirectKey"),
popup: null,
callback: httpsfinder.Overlay.redirect
}];
nb.appendNotification(httpsfinder.strings.getString("httpsfinder.main.httpsFoundPrompt"),
"httpsfinder-https-found",'chrome://httpsfinder/skin/httpsAvailable.png',
nb.PRIORITY_INFO_HIGH, sslFoundButtons);
httpsfinder.Overlay.removeFromWhitelist(aBrowser.contentDocument, null);
if(httpsfinder.prefs.getBoolPref("dismissAlerts"))
setTimeout(function(){
httpsfinder.removeNotification("httpsfinder-https-found")
},httpsfinder.prefs.getIntPref("alertDismissTime") * 1000, 'httpsfinder-https-found');
}
else{
//Catches certain browser location changes and page content that had load flags to fire Detection
if(httpsfinder.debug)
dump("Host mismatch, alert blocked (Document: " +
aBrowser.contentDocument.baseURIObject.host.toLowerCase() + " , Detection host: " + host + "\n");
}
}
}
function addHostToGoodSSLList(host) {
httpsfinder.results.goodSSL.push(host);
httpsfinder.Cookies.goodSSLFound(host);
}
//Certificate testing done before alerting user of https presence
function testCertificate (channel, status, aBrowser) {
var secure = false;
try {
if (! channel instanceof Ci.nsIChannel){
if(httpsfinder.debug)
dump("httpsfinder testCertificate: Invalid channel object\n");
return false;
}
var secInfo = channel.securityInfo;
if (secInfo instanceof Ci.nsITransportSecurityInfo) {
secInfo.QueryInterface(Ci.nsITransportSecurityInfo);
// Check security state flags
if ((secInfo.securityState & Ci.nsIWebProgressListener.STATE_IS_SECURE) ==
Ci.nsIWebProgressListener.STATE_IS_SECURE)
secure = true;
}
//Check SSL certificate details
if (secInfo instanceof Ci.nsISSLStatusProvider) {
var cert = secInfo.QueryInterface(Ci.nsISSLStatusProvider).
SSLStatus.QueryInterface(Ci.nsISSLStatus).serverCert;
var verificationResult = cert.verifyForUsage(Ci.nsIX509Cert.CERT_USAGE_SSLServer);
switch (verificationResult) {
case Ci.nsIX509Cert.VERIFIED_OK:
if(status != 0)
secure = true;
break;
case Ci.nsIX509Cert.NOT_VERIFIED_UNKNOWN:
secure = false;
break;
case Ci.nsIX509Cert.CERT_REVOKED:
secure = false;
break;
case Ci.nsIX509Cert.CERT_EXPIRED:
secure = false;
break;
case Ci.nsIX509Cert.CERT_NOT_TRUSTED:
secure = false;
break;
case Ci.nsIX509Cert.ISSUER_NOT_TRUSTED:
if(httpsfinder.prefs.getBoolPref("allowSelfSignedCerts")){
var nb = gBrowser.getNotificationBox(aBrowser);
var wlButton = [{
label: httpsfinder.strings.getString("httpsfinder.main.whitelist"),
accessKey: httpsfinder.strings.getString("httpsfinder.main.whitelistKey"),
popup: null,
callback: httpsfinder.Overlay.whitelistDomain
},{
label: httpsfinder.strings.getString("httpsfinder.main.yesRedirect"),
accessKey: httpsfinder.strings.getString("httpsfinder.main.yesRedirectKey"),
popup: null,
callback: httpsfinder.Overlay.redirect
}];
nb.appendNotification(httpsfinder.strings.getString("httpsfinder.main.selfSignedAlert"),
"httpsfinder-ssl-selfSigned", 'chrome://httpsfinder/skin/httpsAvailable.png',
nb.PRIORITY_INFO_HIGH, wlButton);
if(httpsfinder.prefs.getBoolPref("dismissAlerts"))
setTimeout(function(){
httpsfinder.removeNotification("httpsfinder-ssl-selfSigned")
},httpsfinder.prefs.getIntPref("alertDismissTime") * 1000, 'httpsfinder-ssl-selfSigned');
}
secure = false;
break;
case Ci.nsIX509Cert.ISSUER_UNKNOWN:
secure = false;
break;
case Ci.nsIX509Cert.INVALID_CA:
secure = false;
break;
default:
secure = false;
break;
}
}
}
catch(err){
secure = false;
Cu.reportError("HTTPS Finder: testCertificate error: " + err.toString() + "\n");
}
if(httpsfinder.debug && secure)
dump("httpsfinder testCertificate: cert OK (on "+
channel.URI.host.toLowerCase()+ ")\n");
return secure;
}
|
