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refactor for enc type header and CryptoKey

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This commit is contained in:
Kyle Spearrin 2017-04-22 10:58:32 -04:00
parent 1edda8b9c0
commit 863cfbad4a
11 changed files with 239 additions and 168 deletions
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4
src/background.js
View File

@ -86,7 +86,7 @@ chrome.runtime.onMessage.addListener(function (msg, sender, sendResponse) {
setIcon();
function setIcon() {
userService.isAuthenticated(function (isAuthenticated) {
cryptoService.getKey(false, function (key) {
cryptoService.getKey(function (key) {
var suffix = '';
if (!isAuthenticated) {
suffix = '_gray';
@ -737,7 +737,7 @@ function checkLock() {
return;
}
cryptoService.getKey(false, function (key) {
cryptoService.getKey(function (key) {
if (!key) {
// no key so no need to lock
return;

91
src/models/domainModels.js
View File

@ -1,13 +1,87 @@
var CipherString = function (encryptedString) {
this.encryptedString = encryptedString;
var CipherString = function () {
this.encryptedString = null;
this.encryptionType = null;
this.decryptedValue = null;
this.cipherText = null;
this.initializationVector = null;
this.mac = null;
if (encryptedString) {
var encPieces = this.encryptedString.split('|');
if (arguments.length >= 2) {
this.encryptedString = arguments[0] + '.' + arguments[1];
this.initializationVector = encPieces[0];
this.cipherText = encPieces[1];
this.mac = encPieces.length > 2 ? encPieces[2] : null;
if (arguments.length > 2 && arguments[2]) {
this.encryptedString += ('|' + arguments[2]);
}
if (arguments.length > 3 && arguments[3]) {
this.encryptedString += ('|' + arguments[3]);
}
this.encryptionType = arguments[0];
this.cipherText = arguments[1];
this.initializationVector = arguments[2] || null;
this.mac = arguments[3] || null;
return;
}
else if (arguments.length !== 1) {
return;
}
this.encryptedString = arguments[0];
if (!this.encryptedString) {
return;
}
var constants = chrome.extension.getBackgroundPage().constantsService;
var headerPieces = this.encryptedString.split('.'),
encPieces;
if (headerPieces.length === 2) {
try {
this.encryptionType = parseInt(headerPieces[0]);
encPieces = headerPieces[1].split('|');
}
catch (e) {
return;
}
}
else {
encPieces = this.encryptedString.split('|');
this.encryptionType = encPieces.length === 3 ? constants.encType.AesCbc128_HmacSha256_B64 :
constants.encType.AesCbc256_B64;
}
switch (this.encryptionType) {
case constants.encType.AesCbc128_HmacSha256_B64:
case constants.encType.AesCbc256_HmacSha256_B64:
if (encPieces.length !== 3) {
return;
}
this.initializationVector = encPieces[0];
this.cipherText = encPieces[1];
this.mac = encPieces[2];
break;
case constants.encType.AesCbc256_B64:
if (encPieces.length !== 2) {
return;
}
this.initializationVector = encPieces[0];
this.cipherText = encPieces[1];
break;
case constants.encType.Rsa2048_OaepSha256_B64:
case constants.encType.Rsa2048_OaepSha1_B64:
if (encPieces.length !== 1) {
return;
}
this.cipherText = encPieces[0];
break;
default:
return;
}
};
@ -52,6 +126,9 @@ var Folder = function (obj, alreadyEncrypted) {
cryptoService.decrypt(this).then(function (decValue) {
this.decryptedValue = decValue;
deferred.resolve(this.decryptedValue);
}, function () {
this.decryptedValue = '[error: cannot decrypt]';
deferred.resolve(this.decryptedValue);
});
}
else {

2
src/popup/app/config.js
View File

@ -14,7 +14,7 @@
var userService = $injector.get('userService');
var cryptoService = $injector.get('cryptoService');
cryptoService.getKey(false, function (key) {
cryptoService.getKey(function (key) {
userService.isAuthenticated(function (isAuthenticated) {
if (isAuthenticated) {
if (!key) {

2
src/popup/app/lock/lockController.js
View File

@ -24,7 +24,7 @@
userService.getEmail(function (email) {
var key = cryptoService.makeKey($scope.masterPassword, email);
cryptoService.hashPassword($scope.masterPassword, key, function (keyHash) {
cryptoService.getKeyHash(true, function (storedKeyHash) {
cryptoService.getKeyHash(function (storedKeyHash) {
if (storedKeyHash && keyHash && storedKeyHash === keyHash) {
cryptoService.setKey(key, function () {
chrome.runtime.sendMessage({ command: 'unlocked' });

2
src/popup/app/settings/settingsController.js
View File

@ -26,7 +26,7 @@
}
chrome.storage.local.set(obj, function () {
cryptoService.getKeyHash(false, function (keyHash) {
cryptoService.getKeyHash(function (keyHash) {
if (keyHash) {
cryptoService.toggleKey(function () { });
}

2
src/popup/app/tools/toolsExportController.js
View File

@ -22,7 +22,7 @@
userService.getEmail(function (email) {
var key = cryptoService.makeKey($scope.masterPassword, email);
cryptoService.hashPassword($scope.masterPassword, key, function (keyHash) {
cryptoService.getKeyHash(true, function (storedKeyHash) {
cryptoService.getKeyHash(function (storedKeyHash) {
if (storedKeyHash && keyHash && storedKeyHash === keyHash) {
deferred.resolve();
}

4
src/services/apiService.js
View File

@ -1,6 +1,6 @@
function ApiService(tokenService, appIdService, utilsService, logoutCallback) {
//this.baseUrl = 'http://localhost:4000';
this.baseUrl = 'https://api.bitwarden.com';
this.baseUrl = 'http://localhost:4000';
//this.baseUrl = 'https://api.bitwarden.com';
this.tokenService = tokenService;
this.logoutCallback = logoutCallback;
this.appIdService = appIdService;

9
src/services/constantsService.js
View File

@ -4,6 +4,13 @@ function ConstantsService() {
disableAddLoginNotificationKey: 'disableAddLoginNotification',
disableContextMenuItemKey: 'disableContextMenuItem',
lockOptionKey: 'lockOption',
lastActiveKey: 'lastActive'
lastActiveKey: 'lastActive',
encType: {
AesCbc256_B64: 0,
AesCbc128_HmacSha256_B64: 1,
AesCbc256_HmacSha256_B64: 2,
Rsa2048_OaepSha256_B64: 3,
Rsa2048_OaepSha1_B64: 4
}
};
};

287
src/services/cryptoService.js
View File

@ -1,15 +1,13 @@
function CryptoService(constantsService) {
this.constantsService = constantsService;
initCryptoService();
initCryptoService(constantsService);
};
function initCryptoService() {
function initCryptoService(constantsService) {
var _key,
_b64Key,
_legacyEtmKey,
_keyHash,
_b64KeyHash,
_encKey,
_macKey;
_b64KeyHash;
CryptoService.prototype.setKey = function (key, callback) {
if (!callback || typeof callback !== 'function') {
@ -27,7 +25,7 @@ function initCryptoService() {
}
chrome.storage.local.set({
'key': forge.util.encode64(key)
'key': key.keyB64
}, function () {
callback();
});
@ -39,33 +37,24 @@ function initCryptoService() {
throw 'callback function required';
}
_keyHash = forge.util.encode64(keyHash);
_keyHash = keyHash;
chrome.storage.local.set({
'keyHash': keyHash
'keyHash': _keyHash
}, function () {
callback();
});
}
CryptoService.prototype.getKey = function (b64, callback) {
CryptoService.prototype.getKey = function (callback) {
if (!callback || typeof callback !== 'function') {
throw 'callback function required';
}
if (b64 && b64 === true && _b64Key) {
callback(_b64Key);
return;
}
else if (!b64 && _key) {
if (_key) {
callback(_key);
return;
}
else if (b64 && b64 === true && _key && !_b64Key) {
_b64Key = forge.util.encode64(_key);
callback(_b64Key);
return;
}
var self = this;
chrome.storage.local.get(self.constantsService.lockOptionKey, function (obj) {
@ -77,13 +66,7 @@ function initCryptoService() {
chrome.storage.local.get('key', function (obj) {
if (obj && obj.key) {
_key = forge.util.decode64(obj.key);
if (b64 && b64 === true) {
_b64Key = obj.key;
callback(_b64Key);
return;
}
_key = new CryptoKey(obj.key, true);
}
callback(_key);
@ -91,67 +74,19 @@ function initCryptoService() {
});
};
CryptoService.prototype.getEncKey = function (callback) {
CryptoService.prototype.getKeyHash = function (callback) {
if (!callback || typeof callback !== 'function') {
throw 'callback function required';
}
if (_encKey) {
callback(_encKey);
}
this.getKey(false, function (key) {
var buffer = forge.util.createBuffer(key);
_encKey = buffer.getBytes(16);
callback(_encKey);
});
};
CryptoService.prototype.getMacKey = function (callback) {
if (!callback || typeof callback !== 'function') {
throw 'callback function required';
}
if (_macKey) {
callback(_macKey);
}
this.getKey(false, function (key) {
var buffer = forge.util.createBuffer(key);
buffer.getBytes(16);
_macKey = buffer.getBytes(16);
callback(_macKey);
});
};
CryptoService.prototype.getKeyHash = function (b64, callback) {
if (!callback || typeof callback !== 'function') {
throw 'callback function required';
}
if (b64 && b64 === true && _b64KeyHash) {
callback(_b64KeyHash);
return;
}
else if (!b64 && _keyHash) {
if (_keyHash) {
callback(_keyHash);
return;
}
else if (b64 && b64 === true && _keyHash && !_b64KeyHash) {
_b64KeyHash = forge.util.encode64(_keyHash);
callback(_b64KeyHash);
return;
}
chrome.storage.local.get('keyHash', function (obj) {
if (obj && obj.keyHash) {
_keyHash = forge.util.decode64(obj.keyHash);
if (b64 && b64 === true) {
_b64KeyHash = obj.keyHash;
callback(_b64KeyHash);
return;
}
_keyHash = obj.keyHash;
}
callback(_keyHash);
@ -163,7 +98,7 @@ function initCryptoService() {
throw 'callback function required';
}
_key = _b64Key = _macKey = _encKey = null;
_key = _legacyEtmKey = null;
chrome.storage.local.remove('key', function () {
callback();
});
@ -174,7 +109,7 @@ function initCryptoService() {
throw 'callback function required';
}
_keyHash = _b64KeyHash = null;
_keyHash = null;
chrome.storage.local.remove('keyHash', function () {
callback();
});
@ -186,7 +121,7 @@ function initCryptoService() {
}
var self = this;
self.getKey(false, function (key) {
self.getKey(function (key) {
chrome.storage.local.get(self.constantsService.lockOptionKey, function (obj) {
if (obj && (obj[self.constantsService.lockOptionKey] || obj[self.constantsService.lockOptionKey] === 0)) {
// if we have a lock option set, clear the key
@ -207,79 +142,62 @@ function initCryptoService() {
});
};
CryptoService.prototype.makeKey = function (password, salt, b64) {
var key = forge.pbkdf2(forge.util.encodeUtf8(password), forge.util.encodeUtf8(salt),
CryptoService.prototype.makeKey = function (password, salt) {
var keyBytes = forge.pbkdf2(forge.util.encodeUtf8(password), forge.util.encodeUtf8(salt),
5000, 256 / 8, 'sha256');
if (b64 && b64 === true) {
return forge.util.encode64(key);
}
return key;
return new CryptoKey(keyBytes);
};
CryptoService.prototype.hashPassword = function (password, key, callback) {
this.getKey(false, function (storedKey) {
if (!key) {
key = storedKey;
}
this.getKey(function (storedKey) {
key = key || storedKey;
if (!password || !key) {
throw 'Invalid parameters.';
}
var hashBits = forge.pbkdf2(key, forge.util.encodeUtf8(password), 1, 256 / 8, 'sha256');
var hashBits = forge.pbkdf2(key.key, forge.util.encodeUtf8(password), 1, 256 / 8, 'sha256');
callback(forge.util.encode64(hashBits));
});
};
CryptoService.prototype.encrypt = function (plaintextValue) {
CryptoService.prototype.encrypt = function (plainValue, key, plainValueEncoding) {
var self = this;
var deferred = Q.defer();
if (plaintextValue === null || plaintextValue === undefined) {
if (plainValue === null || plainValue === undefined) {
deferred.resolve(null);
}
else {
self.getKey(false, function (key) {
self.getEncKey(function (theEncKey) {
self.getMacKey(function (macKey) {
if (!key || !theEncKey || !macKey) {
throw 'Encryption key unavailable.';
}
self.getKey(function (localKey) {
key = key || localKey;
if (!key) {
throw 'Encryption key unavailable.';
}
// TODO: Turn on whenever ready to support encrypt-then-mac
var encKey = false ? theEncKey : key;
plainValueEncoding = plainValueEncoding || 'utf8';
var buffer = forge.util.createBuffer(plainValue, plainValueEncoding);
var ivBytes = forge.random.getBytesSync(16);
var cipher = forge.cipher.createCipher('AES-CBC', key.encKey);
cipher.start({ iv: ivBytes });
cipher.update(buffer);
cipher.finish();
var buffer = forge.util.createBuffer(plaintextValue, 'utf8');
var ivBytes = forge.random.getBytesSync(16);
var cipher = forge.cipher.createCipher('AES-CBC', encKey);
cipher.start({ iv: ivBytes });
cipher.update(buffer);
cipher.finish();
var iv = forge.util.encode64(ivBytes);
var ctBytes = cipher.output.getBytes();
var ct = forge.util.encode64(ctBytes);
var mac = !key.macKey ? null : computeMac(ctBytes, ivBytes, key.macKey);
var iv = forge.util.encode64(ivBytes);
var ctBytes = cipher.output.getBytes();
var ct = forge.util.encode64(ctBytes);
var cipherString = iv + '|' + ct;
// TODO: Turn on whenever ready to support encrypt-then-mac
if (false) {
var mac = computeMac(ctBytes, ivBytes, macKey);
cipherString = cipherString + '|' + mac;
}
var cs = new CipherString(cipherString);
deferred.resolve(cs);
});
});
var cs = new CipherString(key.encType, iv, ct, mac);
deferred.resolve(cs);
});
}
return deferred.promise;
};
CryptoService.prototype.decrypt = function (cipherString) {
CryptoService.prototype.decrypt = function (cipherString, key, outputEncoding) {
var deferred = Q.defer();
var self = this;
@ -287,35 +205,56 @@ function initCryptoService() {
throw 'cannot decrypt nothing';
}
self.getKey(false, function (key) {
self.getEncKey(function (theEncKey) {
self.getMacKey(function (macKey) {
if (!macKey) {
throw 'MAC key unavailable.';
}
self.getKey(function (localKey) {
key = key || localKey;
if (!key) {
throw 'Encryption key unavailable.';
}
var ivBytes = forge.util.decode64(cipherString.initializationVector);
var ctBytes = forge.util.decode64(cipherString.cipherText);
outputEncoding = outputEncoding || 'utf8';
var computedMac = null;
if (cipherString.mac) {
computedMac = computeMac(ctBytes, ivBytes, macKey);
if (computedMac !== cipherString.mac) {
console.error('MAC failed.');
deferred.reject('MAC failed.');
}
}
if (cipherString.encryptionType === constantsService.encType.AesCbc128_HmacSha256_B64 &&
key.encType === constantsService.encType.AesCbc256_B64) {
// Old encrypt-then-mac scheme, swap out the key
_legacyEtmKey = _legacyEtmKey ||
new CryptoKey(key.key, false, constantsService.encType.AesCbc128_HmacSha256_B64);
key = _legacyEtmKey;
}
var ctBuffer = forge.util.createBuffer(ctBytes);
var decipher = forge.cipher.createDecipher('AES-CBC', computedMac ? theEncKey : key);
decipher.start({ iv: ivBytes });
decipher.update(ctBuffer);
decipher.finish();
if (cipherString.encryptionType !== key.encType) {
throw 'encType unavailable.';
}
var decValue = decipher.output.toString('utf8');
deferred.resolve(decValue);
});
});
var ivBytes = forge.util.decode64(cipherString.initializationVector);
var ctBytes = forge.util.decode64(cipherString.cipherText);
if (key.macKey && cipherString.mac) {
var computedMac = computeMac(ctBytes, ivBytes, key.macKey);
if (computedMac !== cipherString.mac) {
console.error('MAC failed.');
deferred.reject('MAC failed.');
}
}
try {
var ctBuffer = forge.util.createBuffer(ctBytes);
var decipher = forge.cipher.createDecipher('AES-CBC', key.encKey);
decipher.start({ iv: ivBytes });
decipher.update(ctBuffer);
decipher.finish();
var decValue;
if (outputEncoding === 'utf8') {
decValue = decipher.output.toString('utf8');
}
else {
decValue = decipher.output.getBytes();
}
deferred.resolve(decValue);
}
catch (e) {
deferred.reject('Decryption failed.');
}
});
return deferred.promise;
@ -328,4 +267,52 @@ function initCryptoService() {
var mac = hmac.digest();
return forge.util.encode64(mac.getBytes());
}
function CryptoKey(keyBytes, b64KeyBytes, encType) {
if (b64KeyBytes) {
keyBytes = forge.util.decode64(keyBytes);
}
if (!keyBytes) {
throw 'Must provide keyBytes';
}
var buffer = forge.util.createBuffer(keyBytes);
if (!buffer || buffer.length() === 0) {
throw 'Couldn\'t make buffer';
}
var bufferLength = buffer.length();
if (encType === null || encType === undefined) {
if (bufferLength === 32) {
encType = constantsService.encType.AesCbc256_B64;
}
else if (bufferLength === 64) {
encType = constantsService.encType.AesCbc256_HmacSha256_B64;
}
else {
throw 'Unable to determine encType.';
}
}
this.key = keyBytes;
this.keyB64 = forge.util.encode64(keyBytes);
this.encType = encType;
if (encType === constantsService.encType.AesCbc256_B64 && bufferLength === 32) {
this.encKey = keyBytes;
this.macKey = null;
}
else if (encType === constantsService.encType.AesCbc128_HmacSha256_B64 && bufferLength === 32) {
this.encKey = buffer.getBytes(16); // first half
this.macKey = buffer.getBytes(16); // second half
}
else if (encType === constantsService.encType.AesCbc256_HmacSha256_B64 && bufferLength === 64) {
this.encKey = buffer.getBytes(32); // first half
this.macKey = buffer.getBytes(32); // second half
}
else {
throw 'Unsupported encType/key length.';
}
}
};

2
src/services/folderService.js
View File

@ -68,7 +68,7 @@ function initFolderService() {
var deferred = Q.defer();
var self = this;
cryptoService.getKey(false, function (key) {
cryptoService.getKey(function (key) {
if (!key) {
deferred.reject();
return;

2
src/services/loginService.js
View File

@ -86,7 +86,7 @@ function initLoginService() {
var deferred = Q.defer();
var self = this;
cryptoService.getKey(false, function (key) {
cryptoService.getKey(function (key) {
if (!key) {
deferred.reject();
return;