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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/. */
/**
* Manages breach alerts for saved logins using data from Firefox Monitor via
* RemoteSettings.
*/
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
LoginHelper: "resource://gre/modules/LoginHelper.sys.mjs",
RemoteSettings: "resource://services-settings/remote-settings.sys.mjs",
RemoteSettingsClient:
"resource://services-settings/RemoteSettingsClient.sys.mjs",
});
export const LoginBreaches = {
REMOTE_SETTINGS_COLLECTION: "fxmonitor-breaches",
async update(breaches = null) {
const logins = await lazy.LoginHelper.getAllUserFacingLogins();
await this.getPotentialBreachesByLoginGUID(logins, breaches);
},
/**
* Return a Map of login GUIDs to a potential breach affecting that login
* by considering only breaches affecting passwords.
*
* This only uses the breach `Domain` and `timePasswordChanged` to determine
* if a login may be breached which means it may contain false-positives if
* login timestamps are incorrect, the user didn't save their password change
* in Firefox, or the breach didn't contain all accounts, etc. As a result,
* consumers should avoid making stronger claims than the data supports.
*
* @param {nsILoginInfo[]} logins Saved logins to check for potential breaches.
* @param {object[]} [breaches = null] Only ones involving passwords will be used.
* @returns {Map} with a key for each login GUID potentially in a breach.
*/
async getPotentialBreachesByLoginGUID(logins, breaches = null) {
const breachesByLoginGUID = new Map();
if (!breaches) {
try {
breaches = await lazy
.RemoteSettings(this.REMOTE_SETTINGS_COLLECTION)
.get();
} catch (ex) {
if (ex instanceof lazy.RemoteSettingsClient.UnknownCollectionError) {
lazy.log.warn(
"Could not get Remote Settings collection.",
this.REMOTE_SETTINGS_COLLECTION,
ex
);
return breachesByLoginGUID;
}
throw ex;
}
}
const BREACH_ALERT_URL = Services.prefs.getStringPref(
"signon.management.page.breachAlertUrl"
);
const baseBreachAlertURL = new URL(BREACH_ALERT_URL);
await Services.logins.initializationPromise;
const storageJSON = Services.logins.wrappedJSObject._storage;
const dismissedBreachAlertsByLoginGUID =
storageJSON.getBreachAlertDismissalsByLoginGUID();
// Determine potentially breached logins by checking their origin and the last time
// they were changed. It's important to note here that we are NOT considering the
// username and password of that login.
for (const login of logins) {
let loginHost;
try {
// nsIURI.host can throw if the URI scheme doesn't have a host.
loginHost = Services.io.newURI(login.origin).host;
} catch {
continue;
}
for (const breach of breaches) {
if (
!breach.Domain ||
!Services.eTLD.hasRootDomain(loginHost, breach.Domain) ||
!this._breachInvolvedPasswords(breach) ||
!this._breachWasAfterPasswordLastChanged(breach, login)
) {
continue;
}
if (!storageJSON.isPotentiallyVulnerablePassword(login)) {
storageJSON.addPotentiallyVulnerablePassword(login);
}
if (
this._breachAlertIsDismissed(
login,
breach,
dismissedBreachAlertsByLoginGUID
)
) {
continue;
}
let breachAlertURL = new URL(breach.Name, baseBreachAlertURL);
breachAlertURL.searchParams.set("utm_source", "firefox-desktop");
breachAlertURL.searchParams.set("utm_medium", "referral");
breachAlertURL.searchParams.set("utm_campaign", "about-logins");
breachAlertURL.searchParams.set("utm_content", "about-logins");
breach.breachAlertURL = breachAlertURL.href;
breachesByLoginGUID.set(login.guid, breach);
}
}
Services.telemetry.scalarSet(
"pwmgr.potentially_breached_passwords",
breachesByLoginGUID.size
);
return breachesByLoginGUID;
},
/**
* Return information about logins using passwords that were potentially in a
* breach.
* @see the caveats in the documentation for `getPotentialBreachesByLoginGUID`.
*
* @param {nsILoginInfo[]} logins to check the passwords of.
* @returns {Map} from login GUID to `true` for logins that have a password
* that may be vulnerable.
*/
getPotentiallyVulnerablePasswordsByLoginGUID(logins) {
const vulnerablePasswordsByLoginGUID = new Map();
const storageJSON = Services.logins.wrappedJSObject._storage;
for (const login of logins) {
if (storageJSON.isPotentiallyVulnerablePassword(login)) {
vulnerablePasswordsByLoginGUID.set(login.guid, true);
}
}
return vulnerablePasswordsByLoginGUID;
},
async clearAllPotentiallyVulnerablePasswords() {
await Services.logins.initializationPromise;
const storageJSON = Services.logins.wrappedJSObject._storage;
storageJSON.clearAllPotentiallyVulnerablePasswords();
},
_breachAlertIsDismissed(login, breach, dismissedBreachAlerts) {
const breachAddedDate = new Date(breach.AddedDate).getTime();
const breachAlertIsDismissed =
dismissedBreachAlerts[login.guid] &&
dismissedBreachAlerts[login.guid].timeBreachAlertDismissed >
breachAddedDate;
return breachAlertIsDismissed;
},
_breachInvolvedPasswords(breach) {
return (
breach.hasOwnProperty("DataClasses") &&
breach.DataClasses.includes("Passwords")
);
},
_breachWasAfterPasswordLastChanged(breach, login) {
const breachDate = new Date(breach.BreachDate).getTime();
return login.timePasswordChanged < breachDate;
},
};
ChromeUtils.defineLazyGetter(lazy, "log", () => {
return lazy.LoginHelper.createLogger("LoginBreaches");
});
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