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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
'use strict';
this.EXPORTED_SYMBOLS = ['ErrorPage'];
const Cu = Components.utils;
const Cc = Components.classes;
const Ci = Components.interfaces;
const kErrorPageFrameScript = 'chrome://b2g/content/ErrorPage.js';
Cu.import('resource://gre/modules/Services.jsm');
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
XPCOMUtils.defineLazyGetter(this, "CertOverrideService", function () {
return Cc["@mozilla.org/security/certoverride;1"]
.getService(Ci.nsICertOverrideService);
});
/**
* A class to add exceptions to override SSL certificate problems.
* The functionality itself is borrowed from exceptionDialog.js.
*/
function SSLExceptions(aCallback, aUri, aWindow) {
this._finishCallback = aCallback;
this._uri = aUri;
this._window = aWindow;
};
SSLExceptions.prototype = {
_finishCallback: null,
_window: null,
_uri: null,
_temporary: null,
_sslStatus: null,
getInterface: function SSLE_getInterface(aIID) {
return this.QueryInterface(aIID);
},
QueryInterface: XPCOMUtils.generateQI([Ci.nsIBadCertListener2]),
/**
* To collect the SSL status we intercept the certificate error here
* and store the status for later use.
*/
notifyCertProblem: function SSLE_notifyCertProblem(aSocketInfo,
aSslStatus,
aTargetHost) {
this._sslStatus = aSslStatus.QueryInterface(Ci.nsISSLStatus);
Services.tm.currentThread.dispatch({
run: this._addOverride.bind(this)
}, Ci.nsIThread.DISPATCH_NORMAL);
return true; // suppress error UI
},
/**
* Attempt to download the certificate for the location specified to get
* the SSLState for the certificate and the errors.
*/
_checkCert: function SSLE_checkCert() {
this._sslStatus = null;
if (!this._uri) {
return;
}
let req = new this._window.XMLHttpRequest();
try {
req.open("GET", this._uri.prePath, true);
req.channel.notificationCallbacks = this;
let xhrHandler = (function() {
req.removeEventListener("load", xhrHandler);
req.removeEventListener("error", xhrHandler);
if (!this._sslStatus) {
// Got response from server without an SSL error.
if (this._finishCallback) {
this._finishCallback();
}
}
}).bind(this);
req.addEventListener("load", xhrHandler);
req.addEventListener("error", xhrHandler);
req.send(null);
} catch (e) {
// We *expect* exceptions if there are problems with the certificate
// presented by the site. Log it, just in case, but we can proceed here,
// with appropriate sanity checks
Components.utils.reportError("Attempted to connect to a site with a bad certificate in the add exception dialog. " +
"This results in a (mostly harmless) exception being thrown. " +
"Logged for information purposes only: " + e);
}
},
/**
* Internal method to create an override.
*/
_addOverride: function SSLE_addOverride() {
let SSLStatus = this._sslStatus;
let uri = this._uri;
let flags = 0;
if (SSLStatus.isUntrusted) {
flags |= Ci.nsICertOverrideService.ERROR_UNTRUSTED;
}
if (SSLStatus.isDomainMismatch) {
flags |= Ci.nsICertOverrideService.ERROR_MISMATCH;
}
if (SSLStatus.isNotValidAtThisTime) {
flags |= Ci.nsICertOverrideService.ERROR_TIME;
}
CertOverrideService.rememberValidityOverride(
uri.asciiHost,
uri.port,
SSLStatus.serverCert,
flags,
this._temporary);
if (this._finishCallback) {
this._finishCallback();
}
},
/**
* Creates a permanent exception to override all overridable errors for
* the given URL.
*/
addException: function SSLE_addException(aTemporary) {
this._temporary = aTemporary;
this._checkCert();
}
};
var ErrorPage = {
_addCertException: function(aMessage) {
let frameLoaderOwner = aMessage.target.QueryInterface(Ci.nsIFrameLoaderOwner);
let win = frameLoaderOwner.ownerDocument.defaultView;
let mm = frameLoaderOwner.frameLoader.messageManager;
let uri = Services.io.newURI(aMessage.data.url, null, null);
let sslExceptions = new SSLExceptions((function() {
mm.sendAsyncMessage('ErrorPage:ReloadPage');
}).bind(this), uri, win);
try {
sslExceptions.addException(!aMessage.data.isPermanent);
} catch (e) {
dump("Failed to set cert exception: " + e + "\n");
}
},
_listenError: function(frameLoader) {
let self = this;
let frameElement = frameLoader.ownerElement;
let injectErrorPageScript = function() {
let mm = frameLoader.messageManager;
try {
mm.loadFrameScript(kErrorPageFrameScript, true, true);
} catch (e) {
dump('Error loading ' + kErrorPageFrameScript + ' as frame script: ' + e + '\n');
}
mm.addMessageListener('ErrorPage:AddCertException', self._addCertException.bind(self));
frameElement.removeEventListener('mozbrowsererror', injectErrorPageScript, true);
};
frameElement.addEventListener('mozbrowsererror',
injectErrorPageScript,
true // use capture
);
},
init: function errorPageInit() {
Services.obs.addObserver(this, 'inprocess-browser-shown', false);
Services.obs.addObserver(this, 'remote-browser-shown', false);
},
observe: function errorPageObserve(aSubject, aTopic, aData) {
let frameLoader = aSubject.QueryInterface(Ci.nsIFrameLoader);
// Ignore notifications that aren't from a BrowserOrApp
if (!frameLoader.ownerIsMozBrowserOrAppFrame) {
return;
}
this._listenError(frameLoader);
}
};
ErrorPage.init();
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