The Tor Browser: comparison toolkit/components/passwordmgr/crypto-SDR.js

comparison: toolkit/components/passwordmgr/crypto-SDR.js

toolkit/components/passwordmgr/crypto-SDR.js

branch: TOR_BUG_3246
changeset 7: 129ffea94266

equal deleted inserted replaced

--1:000000000000
+:b678c3cbdb5b
+/* 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/. */
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cr = Components.results;
+Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+Components.utils.import("resource://gre/modules/Services.jsm");
+function LoginManagerCrypto_SDR() {
+this.init();
+};
+LoginManagerCrypto_SDR.prototype = {
+classID : Components.ID("{dc6c2976-0f73-4f1f-b9ff-3d72b4e28309}"),
+QueryInterface : XPCOMUtils.generateQI([Ci.nsILoginManagerCrypto]),
+__sdrSlot : null, // PKCS#11 slot being used by the SDR.
+get _sdrSlot() {
+if (!this.__sdrSlot) {
+let modules = Cc["@mozilla.org/security/pkcs11moduledb;1"].
+getService(Ci.nsIPKCS11ModuleDB);
+this.__sdrSlot = modules.findSlotByName("");
+}
+return this.__sdrSlot;
+},
+__decoderRing : null,  // nsSecretDecoderRing service
+get _decoderRing() {
+if (!this.__decoderRing)
+this.__decoderRing = Cc["@mozilla.org/security/sdr;1"].
+getService(Ci.nsISecretDecoderRing);
+return this.__decoderRing;
+},
+__utfConverter : null, // UCS2 <--> UTF8 string conversion
+get _utfConverter() {
+if (!this.__utfConverter) {
+this.__utfConverter = Cc["@mozilla.org/intl/scriptableunicodeconverter"].
+createInstance(Ci.nsIScriptableUnicodeConverter);
+this.__utfConverter.charset = "UTF-8";
+}
+return this.__utfConverter;
+},
+_utfConverterReset : function() {
+this.__utfConverter = null;
+},
+_debug  : false, // mirrors signon.debug
+_uiBusy : false,
+/*
+* log
+*
+* Internal function for logging debug messages to the Error Console.
+*/
+log : function (message) {
+if (!this._debug)
+return;
+dump("PwMgr cryptoSDR: " + message + "\n");
+Services.console.logStringMessage("PwMgr cryptoSDR: " + message);
+},
+init : function () {
+// Connect to the correct preferences branch.
+this._prefBranch = Services.prefs.getBranch("signon.");
+this._debug = this._prefBranch.getBoolPref("debug");
+// Check to see if the internal PKCS#11 token has been initialized.
+// If not, set a blank password.
+let tokenDB = Cc["@mozilla.org/security/pk11tokendb;1"].
+getService(Ci.nsIPK11TokenDB);
+let token = tokenDB.getInternalKeyToken();
+if (token.needsUserInit) {
+this.log("Initializing key3.db with default blank password.");
+token.initPassword("");
+}
+},
+/*
+* encrypt
+*
+* Encrypts the specified string, using the SecretDecoderRing.
+*
+* Returns the encrypted string, or throws an exception if there was a
+* problem.
+*/
+encrypt : function (plainText) {
+let cipherText = null;
+let wasLoggedIn = this.isLoggedIn;
+let canceledMP = false;
+this._uiBusy = true;
+try {
+let plainOctet = this._utfConverter.ConvertFromUnicode(plainText);
+plainOctet += this._utfConverter.Finish();
+cipherText = this._decoderRing.encryptString(plainOctet);
+} catch (e) {
+this.log("Failed to encrypt string. (" + e.name + ")");
+// If the user clicks Cancel, we get NS_ERROR_FAILURE.
+// (unlike decrypting, which gets NS_ERROR_NOT_AVAILABLE).
+if (e.result == Cr.NS_ERROR_FAILURE) {
+canceledMP = true;
+throw Components.Exception("User canceled master password entry", Cr.NS_ERROR_ABORT);
+} else {
+throw Components.Exception("Couldn't encrypt string", Cr.NS_ERROR_FAILURE);
+}
+} finally {
+this._uiBusy = false;
+// If we triggered a master password prompt, notify observers.
+if (!wasLoggedIn && this.isLoggedIn)
+this._notifyObservers("passwordmgr-crypto-login");
+else if (canceledMP)
+this._notifyObservers("passwordmgr-crypto-loginCanceled");
+}
+return cipherText;
+},
+/*
+* decrypt
+*
+* Decrypts the specified string, using the SecretDecoderRing.
+*
+* Returns the decrypted string, or throws an exception if there was a
+* problem.
+*/
+decrypt : function (cipherText) {
+let plainText = null;
+let wasLoggedIn = this.isLoggedIn;
+let canceledMP = false;
+this._uiBusy = true;
+try {
+let plainOctet;
+plainOctet = this._decoderRing.decryptString(cipherText);
+plainText = this._utfConverter.ConvertToUnicode(plainOctet);
+} catch (e) {
+this.log("Failed to decrypt string: " + cipherText +
+" (" + e.name + ")");
+// In the unlikely event the converter threw, reset it.
+this._utfConverterReset();
+// If the user clicks Cancel, we get NS_ERROR_NOT_AVAILABLE.
+// If the cipherText is bad / wrong key, we get NS_ERROR_FAILURE
+// Wrong passwords are handled by the decoderRing reprompting;
+// we get no notification.
+if (e.result == Cr.NS_ERROR_NOT_AVAILABLE) {
+canceledMP = true;
+throw Components.Exception("User canceled master password entry", Cr.NS_ERROR_ABORT);
+} else {
+throw Components.Exception("Couldn't decrypt string", Cr.NS_ERROR_FAILURE);
+}
+} finally {
+this._uiBusy = false;
+// If we triggered a master password prompt, notify observers.
+if (!wasLoggedIn && this.isLoggedIn)
+this._notifyObservers("passwordmgr-crypto-login");
+else if (canceledMP)
+this._notifyObservers("passwordmgr-crypto-loginCanceled");
+}
+return plainText;
+},
+/*
+* uiBusy
+*/
+get uiBusy() {
+return this._uiBusy;
+},
+/*
+* isLoggedIn
+*/
+get isLoggedIn() {
+let status = this._sdrSlot.status;
+this.log("SDR slot status is " + status);
+if (status == Ci.nsIPKCS11Slot.SLOT_READY ||
+status == Ci.nsIPKCS11Slot.SLOT_LOGGED_IN)
+return true;
+if (status == Ci.nsIPKCS11Slot.SLOT_NOT_LOGGED_IN)
+return false;
+throw Components.Exception("unexpected slot status: " + status, Cr.NS_ERROR_FAILURE);
+},
+/*
+* defaultEncType
+*/
+get defaultEncType() {
+return Ci.nsILoginManagerCrypto.ENCTYPE_SDR;
+},
+/*
+* _notifyObservers
+*/
+_notifyObservers : function(topic) {
+this.log("Prompted for a master password, notifying for " + topic);
+Services.obs.notifyObservers(null, topic, null);
+},
+}; // end of nsLoginManagerCrypto_SDR implementation
+let component = [LoginManagerCrypto_SDR];
+this.NSGetFactory = XPCOMUtils.generateNSGetFactory(component);