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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/. */
this.EXPORTED_SYMBOLS = [ "InsecurePasswordUtils" ];
const { classes: Cc, interfaces: Ci, results: Cr, utils: Cu } = Components;
const STRINGS_URI = "chrome://global/locale/security/security.properties";
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "devtools",
"resource://devtools/shared/Loader.jsm");
XPCOMUtils.defineLazyServiceGetter(this, "gContentSecurityManager",
"@mozilla.org/contentsecuritymanager;1",
"nsIContentSecurityManager");
XPCOMUtils.defineLazyServiceGetter(this, "gScriptSecurityManager",
"@mozilla.org/scriptsecuritymanager;1",
"nsIScriptSecurityManager");
XPCOMUtils.defineLazyGetter(this, "WebConsoleUtils", () => {
return this.devtools.require("devtools/server/actors/utils/webconsole-utils").Utils;
});
/*
* A module that provides utility functions for form security.
*
* Note:
* This module uses isSecureContextIfOpenerIgnored instead of isSecureContext.
*
* We don't want to expose JavaScript APIs in a non-Secure Context even if
* the context is only insecure because the windows has an insecure opener.
* Doing so prevents sites from implementing postMessage workarounds to enable
* an insecure opener to gain access to Secure Context-only APIs. However,
* in the case of form fields such as password fields we don't need to worry
* about whether the opener is secure or not. In fact to flag a password
* field as insecure in such circumstances would unnecessarily confuse our
* users.
*/
this.InsecurePasswordUtils = {
_formRootsWarned: new WeakMap(),
_sendWebConsoleMessage(messageTag, domDoc) {
let windowId = WebConsoleUtils.getInnerWindowId(domDoc.defaultView);
let category = "Insecure Password Field";
// All web console messages are warnings for now.
let flag = Ci.nsIScriptError.warningFlag;
let bundle = Services.strings.createBundle(STRINGS_URI);
let message = bundle.GetStringFromName(messageTag);
let consoleMsg = Cc["@mozilla.org/scripterror;1"].createInstance(Ci.nsIScriptError);
consoleMsg.initWithWindowID(message, domDoc.location.href, 0, 0, 0, flag, category, windowId);
Services.console.logMessage(consoleMsg);
},
/**
* Gets the security state of the passed form.
*
* @param {FormLike} aForm A form-like object. @See {FormLikeFactory}
*
* @returns {Object} An object with the following boolean values:
* isFormSubmitHTTP: if the submit action is an http:// URL
* isFormSubmitSecure: if the submit action URL is secure,
* either because it is HTTPS or because its origin is considered trustworthy
*/
_checkFormSecurity(aForm) {
let isFormSubmitHTTP = false, isFormSubmitSecure = false;
if (aForm.rootElement instanceof Ci.nsIDOMHTMLFormElement) {
let uri = Services.io.newURI(aForm.rootElement.action || aForm.rootElement.baseURI,
null, null);
let principal = gScriptSecurityManager.getCodebasePrincipal(uri);
if (uri.schemeIs("http")) {
isFormSubmitHTTP = true;
if (gContentSecurityManager.isOriginPotentiallyTrustworthy(principal)) {
isFormSubmitSecure = true;
}
} else {
isFormSubmitSecure = true;
}
}
return { isFormSubmitHTTP, isFormSubmitSecure };
},
/**
* Checks if there are insecure password fields present on the form's document
* i.e. passwords inside forms with http action, inside iframes with http src,
* or on insecure web pages.
*
* @param {FormLike} aForm A form-like object. @See {LoginFormFactory}
* @return {boolean} whether the form is secure
*/
isFormSecure(aForm) {
// Ignores window.opener, see top level documentation.
let isSafePage = aForm.ownerDocument.defaultView.isSecureContextIfOpenerIgnored;
let { isFormSubmitSecure, isFormSubmitHTTP } = this._checkFormSecurity(aForm);
return isSafePage && (isFormSubmitSecure || !isFormSubmitHTTP);
},
/**
* Report insecure password fields in a form to the web console to warn developers.
*
* @param {FormLike} aForm A form-like object. @See {FormLikeFactory}
*/
reportInsecurePasswords(aForm) {
if (this._formRootsWarned.has(aForm.rootElement) ||
this._formRootsWarned.get(aForm.rootElement)) {
return;
}
let domDoc = aForm.ownerDocument;
// Ignores window.opener, see top level documentation.
let isSafePage = domDoc.defaultView.isSecureContextIfOpenerIgnored;
let { isFormSubmitHTTP, isFormSubmitSecure } = this._checkFormSecurity(aForm);
if (!isSafePage) {
if (domDoc.defaultView == domDoc.defaultView.parent) {
this._sendWebConsoleMessage("InsecurePasswordsPresentOnPage", domDoc);
} else {
this._sendWebConsoleMessage("InsecurePasswordsPresentOnIframe", domDoc);
}
this._formRootsWarned.set(aForm.rootElement, true);
} else if (isFormSubmitHTTP && !isFormSubmitSecure) {
this._sendWebConsoleMessage("InsecureFormActionPasswordsPresent", domDoc);
this._formRootsWarned.set(aForm.rootElement, true);
}
// The safety of a password field determined by the form action and the page protocol
let passwordSafety;
if (isSafePage) {
if (isFormSubmitSecure) {
passwordSafety = 0;
} else if (isFormSubmitHTTP) {
passwordSafety = 1;
} else {
passwordSafety = 2;
}
} else if (isFormSubmitSecure) {
passwordSafety = 3;
} else if (isFormSubmitHTTP) {
passwordSafety = 4;
} else {
passwordSafety = 5;
}
Services.telemetry.getHistogramById("PWMGR_LOGIN_PAGE_SAFETY").add(passwordSafety);
},
};
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