2021-04-06 20:10:42 +02:00
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import kdbxweb from 'kdbxweb';
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import { box as tweetnaclBox } from 'tweetnacl';
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2021-04-06 21:27:58 +02:00
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import { Events } from 'framework/events';
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2021-04-06 20:10:42 +02:00
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import { RuntimeInfo } from 'const/runtime-info';
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2021-04-10 23:35:42 +02:00
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import { KnownAppVersions } from 'const/known-app-versions';
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2021-04-06 20:10:42 +02:00
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import { Launcher } from 'comp/launcher';
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import { AppSettingsModel } from 'models/app-settings-model';
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2021-04-08 17:28:41 +02:00
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import { Alerts } from 'comp/ui/alerts';
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2021-04-08 17:59:39 +02:00
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import { PasswordGenerator } from 'util/generators/password-generator';
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import { GeneratorPresets } from 'comp/app/generator-presets';
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2021-04-11 10:17:02 +02:00
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import { Logger } from 'util/logger';
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const logger = new Logger('browser-extension-connector');
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2021-04-06 20:10:42 +02:00
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2021-04-10 21:16:48 +02:00
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let appModel;
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2021-04-11 12:48:58 +02:00
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const connectedClients = new Map();
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2021-04-10 21:16:48 +02:00
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const MaxIncomingDataLength = 10000;
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2021-04-06 20:10:42 +02:00
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function incrementNonce(nonce) {
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// from libsodium/utils.c, like it is in KeePassXC
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let i = 0;
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let c = 1;
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for (; i < nonce.length; ++i) {
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c += nonce[i];
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nonce[i] = c;
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c >>= 8;
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}
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}
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function getClient(request) {
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if (!request.clientID) {
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throw new Error('Empty clientID');
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}
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2021-04-11 12:48:58 +02:00
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const client = connectedClients.get(request.clientID);
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2021-04-06 20:10:42 +02:00
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if (!client) {
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throw new Error(`Client not connected: ${request.clientID}`);
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}
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return client;
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}
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function decryptRequest(request) {
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const client = getClient(request);
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if (!request.nonce) {
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throw new Error('Empty nonce');
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}
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if (!request.message) {
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throw new Error('Empty message');
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}
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const nonce = kdbxweb.ByteUtils.base64ToBytes(request.nonce);
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const message = kdbxweb.ByteUtils.base64ToBytes(request.message);
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const data = tweetnaclBox.open(message, nonce, client.publicKey, client.keys.secretKey);
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const json = new TextDecoder().decode(data);
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const payload = JSON.parse(json);
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2021-04-08 17:36:42 +02:00
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if (!payload) {
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throw new Error('Empty request payload');
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}
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if (payload.action !== request.action) {
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2021-04-06 20:10:42 +02:00
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throw new Error(`Bad action in decrypted payload`);
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}
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return payload;
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}
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function encryptResponse(request, payload) {
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2021-04-08 17:36:42 +02:00
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const nonceBytes = kdbxweb.ByteUtils.base64ToBytes(request.nonce);
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incrementNonce(nonceBytes);
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const nonce = kdbxweb.ByteUtils.bytesToBase64(nonceBytes);
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2021-04-06 20:10:42 +02:00
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const client = getClient(request);
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2021-04-08 17:36:42 +02:00
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payload.nonce = nonce;
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2021-04-06 20:10:42 +02:00
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const json = JSON.stringify(payload);
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const data = new TextEncoder().encode(json);
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2021-04-08 17:36:42 +02:00
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const encrypted = tweetnaclBox(data, nonceBytes, client.publicKey, client.keys.secretKey);
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2021-04-06 20:10:42 +02:00
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const message = kdbxweb.ByteUtils.bytesToBase64(encrypted);
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return {
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action: request.action,
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message,
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nonce
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};
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}
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2021-04-10 23:35:42 +02:00
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function getVersion(request) {
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2021-04-10 23:36:21 +02:00
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const extensionName = getClient(request).extensionName;
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2021-04-10 23:35:42 +02:00
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return extensionName ? RuntimeInfo.version : KnownAppVersions.KeePassXC;
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}
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function isKeeWebConnect(request) {
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2021-04-10 23:36:21 +02:00
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return getClient(request).extensionName === 'keeweb-connect';
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2021-04-10 23:35:42 +02:00
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}
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2021-04-11 15:04:04 +02:00
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const ErrorMessages = {
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noOpenFiles: 'No open files'
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};
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const ErrorCode = {
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[ErrorMessages.noOpenFiles]: 1
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};
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2021-04-11 14:53:56 +02:00
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2021-04-06 20:10:42 +02:00
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const ProtocolHandlers = {
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'ping'({ data }) {
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return { data };
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},
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2021-04-10 23:35:42 +02:00
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'change-public-keys'(request) {
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2021-04-11 12:48:58 +02:00
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let { publicKey, extensionName, version, clientID: clientId } = request;
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2021-04-10 23:35:42 +02:00
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2021-04-11 12:48:58 +02:00
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if (connectedClients.has(clientId)) {
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2021-04-11 10:17:02 +02:00
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throw new Error('Changing keys is not allowed');
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}
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2021-04-11 12:48:58 +02:00
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if (!Launcher) {
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// on web there can be only one connected client
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connectedClients.clear();
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}
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2021-04-06 20:10:42 +02:00
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const keys = tweetnaclBox.keyPair();
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publicKey = kdbxweb.ByteUtils.base64ToBytes(publicKey);
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2021-04-11 12:48:58 +02:00
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connectedClients.set(clientId, { publicKey, extensionName, version, keys });
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2021-04-06 20:10:42 +02:00
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2021-04-11 12:48:58 +02:00
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logger.info('New client key created', clientId, extensionName, version);
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2021-04-11 10:17:02 +02:00
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2021-04-11 14:53:56 +02:00
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const nonceBytes = kdbxweb.ByteUtils.base64ToBytes(request.nonce);
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incrementNonce(nonceBytes);
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const nonce = kdbxweb.ByteUtils.bytesToBase64(nonceBytes);
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2021-04-06 20:10:42 +02:00
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return {
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action: 'change-public-keys',
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2021-04-10 23:35:42 +02:00
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version: getVersion(request),
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2021-04-06 20:10:42 +02:00
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publicKey: kdbxweb.ByteUtils.bytesToBase64(keys.publicKey),
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2021-04-11 14:53:56 +02:00
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nonce,
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2021-04-10 23:37:24 +02:00
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success: 'true',
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...(isKeeWebConnect(request) ? { appName: 'KeeWeb' } : undefined)
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2021-04-06 20:10:42 +02:00
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};
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},
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'get-databasehash'(request) {
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decryptRequest(request);
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2021-04-07 21:08:22 +02:00
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2021-04-10 21:16:48 +02:00
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const firstFile = appModel.files.firstActiveKdbxFile();
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2021-04-07 21:08:22 +02:00
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if (firstFile?.defaultGroupHash) {
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return encryptResponse(request, {
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2021-04-07 22:04:21 +02:00
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hash: firstFile.defaultGroupHash,
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2021-04-11 14:53:56 +02:00
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success: 'true',
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version: getVersion(request),
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2021-04-10 23:35:42 +02:00
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...(isKeeWebConnect(request)
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? {
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hashes: appModel.files
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.filter((file) => file.active && !file.backend)
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.map((file) => file.defaultGroupHash)
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}
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: undefined)
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2021-04-07 21:08:22 +02:00
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});
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} else {
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2021-04-11 15:04:04 +02:00
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throw new Error(ErrorMessages.noOpenFiles);
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2021-04-07 21:08:22 +02:00
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}
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2021-04-07 22:49:23 +02:00
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},
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2021-04-08 17:59:39 +02:00
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'generate-password'(request) {
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2021-04-08 18:10:08 +02:00
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const password = PasswordGenerator.generate(GeneratorPresets.browserExtensionPreset);
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2021-04-08 17:59:39 +02:00
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return encryptResponse(request, {
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2021-04-10 23:35:42 +02:00
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version: getVersion(request),
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2021-04-08 17:59:39 +02:00
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success: 'true',
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2021-04-11 14:53:56 +02:00
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entries: [{ password }]
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2021-04-08 17:59:39 +02:00
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});
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},
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2021-04-07 22:49:23 +02:00
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'lock-database'(request) {
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decryptRequest(request);
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2021-04-11 14:53:56 +02:00
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if (appModel.files.hasOpenFiles()) {
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Events.emit('lock-workspace');
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2021-04-07 22:49:23 +02:00
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2021-04-11 14:53:56 +02:00
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if (Alerts.alertDisplayed) {
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BrowserExtensionConnector.focusKeeWeb();
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}
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2021-04-08 17:28:41 +02:00
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2021-04-11 14:53:56 +02:00
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return encryptResponse(request, {
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success: 'true',
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version: getVersion(request)
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});
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} else {
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2021-04-11 15:04:04 +02:00
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throw new Error(ErrorMessages.noOpenFiles);
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2021-04-11 14:53:56 +02:00
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}
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2021-04-06 20:10:42 +02:00
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}
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};
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const BrowserExtensionConnector = {
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enabled: false,
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2021-04-10 21:16:48 +02:00
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init(model) {
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appModel = model;
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2021-04-06 21:27:58 +02:00
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this.browserWindowMessage = this.browserWindowMessage.bind(this);
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this.fileOpened = this.fileOpened.bind(this);
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this.oneFileClosed = this.oneFileClosed.bind(this);
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this.allFilesClosed = this.allFilesClosed.bind(this);
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2021-04-06 20:10:42 +02:00
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AppSettingsModel.on('change:browserExtension', (model, enabled) => {
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2021-04-06 21:27:58 +02:00
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this.enabled = enabled;
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2021-04-06 20:10:42 +02:00
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if (enabled) {
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this.start();
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} else {
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this.stop();
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}
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});
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if (AppSettingsModel.browserExtension) {
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2021-04-06 21:27:58 +02:00
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this.enabled = true;
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2021-04-06 20:10:42 +02:00
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this.start();
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}
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},
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start() {
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2021-04-10 21:16:48 +02:00
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if (Launcher) {
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this.startDesktopAppListener();
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} else {
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2021-04-06 20:10:42 +02:00
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this.startWebMessageListener();
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}
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2021-04-06 21:27:58 +02:00
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Events.on('file-opened', this.fileOpened);
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Events.on('one-file-closed', this.oneFileClosed);
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Events.on('all-files-closed', this.allFilesClosed);
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2021-04-11 10:17:02 +02:00
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logger.info('Started');
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2021-04-06 20:10:42 +02:00
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},
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stop() {
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2021-04-10 21:16:48 +02:00
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if (Launcher) {
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this.stopDesktopAppListener();
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} else {
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2021-04-06 20:10:42 +02:00
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this.stopWebMessageListener();
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}
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2021-04-06 21:27:58 +02:00
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Events.off('file-opened', this.fileOpened);
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Events.off('one-file-closed', this.oneFileClosed);
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Events.off('all-files-closed', this.allFilesClosed);
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2021-04-11 10:17:02 +02:00
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logger.info('Stopped');
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2021-04-06 20:10:42 +02:00
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},
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startWebMessageListener() {
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window.addEventListener('message', this.browserWindowMessage);
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},
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stopWebMessageListener() {
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window.removeEventListener('message', this.browserWindowMessage);
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},
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2021-04-10 21:16:48 +02:00
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startDesktopAppListener() {
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Launcher.closeOldBrowserExtensionSocket(() => {
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const sockName = Launcher.getBrowserExtensionSocketName();
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const { createServer } = Launcher.req('net');
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this.connectedSockets = [];
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this.connectedSocketState = new WeakMap();
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this.server = createServer((socket) => {
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2021-04-11 10:17:02 +02:00
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logger.info('New connection');
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2021-04-10 21:16:48 +02:00
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this.connectedSockets.push(socket);
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2021-04-10 21:32:29 +02:00
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this.connectedSocketState.set(socket, {});
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this.checkSocketIdentity(socket);
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socket.on('data', (data) => this.onSocketData(socket, data));
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socket.on('close', () => this.onSocketClose(socket));
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2021-04-10 21:16:48 +02:00
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});
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this.server.listen(sockName);
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});
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},
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stopDesktopAppListener() {
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for (const socket of this.connectedSockets) {
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socket.destroy();
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}
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if (this.server) {
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this.server.close();
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}
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this.connectedSockets = [];
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this.connectedSocketState = new WeakMap();
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},
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2021-04-10 21:32:29 +02:00
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checkSocketIdentity(socket) {
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const state = this.connectedSocketState.get(socket);
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if (!state) {
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return;
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}
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// TODO: check the process
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state.active = true;
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this.processPendingSocketData(socket);
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},
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onSocketClose(socket) {
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2021-04-11 12:48:58 +02:00
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const state = this.connectedSocketState.get(socket);
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if (state?.clientId) {
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connectedClients.delete(state.clientId);
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}
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2021-04-10 21:32:29 +02:00
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this.connectedSocketState.delete(socket);
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2021-04-11 12:48:58 +02:00
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this.connectedSockets = this.connectedSockets.filter((s) => s !== socket);
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logger.info('Connection closed', state?.clientId);
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2021-04-10 21:32:29 +02:00
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},
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2021-04-10 21:16:48 +02:00
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onSocketData(socket, data) {
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if (data.byteLength > MaxIncomingDataLength) {
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2021-04-11 10:17:02 +02:00
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logger.warn('Too many bytes rejected', data.byteLength);
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2021-04-10 21:16:48 +02:00
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socket.destroy();
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return;
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}
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const state = this.connectedSocketState.get(socket);
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|
|
|
if (!state) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (state.pendingData) {
|
|
|
|
state.pendingData = Buffer.concat([state.pendingData, data]);
|
|
|
|
} else {
|
|
|
|
state.pendingData = data;
|
|
|
|
}
|
2021-04-10 21:32:29 +02:00
|
|
|
if (state.active) {
|
|
|
|
this.processPendingSocketData(socket);
|
|
|
|
}
|
|
|
|
},
|
|
|
|
|
|
|
|
processPendingSocketData(socket) {
|
|
|
|
const state = this.connectedSocketState.get(socket);
|
|
|
|
if (!state) {
|
2021-04-10 21:16:48 +02:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
while (state.pendingData) {
|
2021-04-10 21:32:29 +02:00
|
|
|
if (state.pendingData.length < 4) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2021-04-11 10:17:02 +02:00
|
|
|
const lengthBuffer = kdbxweb.ByteUtils.arrayToBuffer(state.pendingData.slice(0, 4));
|
2021-04-10 21:16:48 +02:00
|
|
|
const length = new Uint32Array(lengthBuffer)[0];
|
|
|
|
|
|
|
|
if (length > MaxIncomingDataLength) {
|
2021-04-11 10:17:02 +02:00
|
|
|
logger.warn('Large message rejected', length);
|
2021-04-10 21:16:48 +02:00
|
|
|
socket.destroy();
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (state.pendingData.byteLength < length + 4) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
const messageBytes = state.pendingData.slice(4, length + 4);
|
|
|
|
if (state.pendingData.byteLength > length + 4) {
|
|
|
|
state.pendingData = state.pendingData.slice(length + 4);
|
|
|
|
} else {
|
|
|
|
state.pendingData = null;
|
|
|
|
}
|
|
|
|
|
|
|
|
const str = messageBytes.toString();
|
|
|
|
let request;
|
|
|
|
try {
|
|
|
|
request = JSON.parse(str);
|
|
|
|
} catch {
|
2021-04-11 10:17:02 +02:00
|
|
|
logger.warn('Failed to parse message', str);
|
2021-04-10 21:16:48 +02:00
|
|
|
socket.destroy();
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2021-04-11 12:48:58 +02:00
|
|
|
const clientId = request?.clientID;
|
|
|
|
if (!clientId) {
|
|
|
|
logger.warn('Empty client ID in request', request);
|
|
|
|
socket.destroy();
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!state.clientId) {
|
|
|
|
state.clientId = clientId;
|
|
|
|
} else if (state.clientId !== clientId) {
|
|
|
|
logger.warn(`Changing client ID is not allowed: ${state.clientId} => ${clientId}`);
|
|
|
|
socket.destroy();
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2021-04-10 21:16:48 +02:00
|
|
|
let response;
|
|
|
|
try {
|
|
|
|
const handler = ProtocolHandlers[request.action];
|
|
|
|
if (!handler) {
|
|
|
|
throw new Error(`Handler not found: ${request.action}`);
|
|
|
|
}
|
|
|
|
response = handler(request) || {};
|
|
|
|
} catch (e) {
|
2021-04-11 15:04:04 +02:00
|
|
|
response = this.errorToResponse(e, request);
|
2021-04-10 21:16:48 +02:00
|
|
|
}
|
|
|
|
if (response) {
|
|
|
|
this.sendSocketResponse(socket, response);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
},
|
|
|
|
|
2021-04-06 20:10:42 +02:00
|
|
|
browserWindowMessage(e) {
|
|
|
|
if (e.origin !== location.origin) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (e.source !== window) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (e?.data?.kwConnect !== 'request') {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
let response;
|
|
|
|
try {
|
|
|
|
const handler = ProtocolHandlers[e.data.action];
|
|
|
|
if (!handler) {
|
|
|
|
throw new Error(`Handler not found: ${e.data.action}`);
|
|
|
|
}
|
|
|
|
response = handler(e.data) || {};
|
|
|
|
} catch (e) {
|
2021-04-11 15:04:04 +02:00
|
|
|
response = this.errorToResponse(e, e.data);
|
2021-04-06 20:10:42 +02:00
|
|
|
}
|
|
|
|
if (response) {
|
2021-04-10 21:16:48 +02:00
|
|
|
this.sendWebResponse(response);
|
2021-04-06 20:10:42 +02:00
|
|
|
}
|
2021-04-06 21:27:58 +02:00
|
|
|
},
|
|
|
|
|
2021-04-11 15:04:04 +02:00
|
|
|
errorToResponse(e, request) {
|
|
|
|
return {
|
|
|
|
action: request.action,
|
|
|
|
error: e.message || 'Unknown error',
|
|
|
|
code: ErrorCode[e.message] ?? 0
|
|
|
|
};
|
|
|
|
},
|
|
|
|
|
2021-04-10 21:16:48 +02:00
|
|
|
sendWebResponse(response) {
|
2021-04-06 21:27:58 +02:00
|
|
|
response.kwConnect = 'response';
|
|
|
|
postMessage(response, window.location.origin);
|
|
|
|
},
|
|
|
|
|
2021-04-10 21:16:48 +02:00
|
|
|
sendSocketResponse(socket, response) {
|
|
|
|
const responseData = Buffer.from(JSON.stringify(response));
|
2021-04-11 10:17:02 +02:00
|
|
|
const lengthBuf = kdbxweb.ByteUtils.arrayToBuffer(
|
|
|
|
new Uint32Array([responseData.byteLength])
|
|
|
|
);
|
|
|
|
const lengthBytes = Buffer.from(lengthBuf);
|
2021-04-10 21:16:48 +02:00
|
|
|
const data = Buffer.concat([lengthBytes, responseData]);
|
|
|
|
socket.write(data);
|
|
|
|
},
|
|
|
|
|
|
|
|
sendSocketEvent(data) {
|
|
|
|
for (const socket of this.connectedSockets) {
|
|
|
|
const state = this.connectedSocketState.get(socket);
|
|
|
|
if (state?.active) {
|
|
|
|
this.sendSocketResponse(socket, data);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
},
|
|
|
|
|
|
|
|
sendEvent(data) {
|
|
|
|
if (Launcher) {
|
|
|
|
this.sendSocketEvent(data);
|
|
|
|
} else {
|
|
|
|
this.sendWebResponse(data);
|
|
|
|
}
|
|
|
|
},
|
|
|
|
|
2021-04-06 21:27:58 +02:00
|
|
|
fileOpened() {
|
2021-04-10 21:16:48 +02:00
|
|
|
this.sendEvent({ action: 'database-unlocked' });
|
2021-04-06 21:27:58 +02:00
|
|
|
},
|
|
|
|
|
|
|
|
oneFileClosed() {
|
2021-04-10 21:16:48 +02:00
|
|
|
this.sendEvent({ action: 'database-locked' });
|
|
|
|
if (appModel.files.hasOpenFiles()) {
|
|
|
|
this.sendEvent({ action: 'database-unlocked' });
|
2021-04-06 21:27:58 +02:00
|
|
|
}
|
|
|
|
},
|
|
|
|
|
|
|
|
allFilesClosed() {
|
2021-04-10 21:16:48 +02:00
|
|
|
this.sendEvent({ action: 'database-locked' });
|
2021-04-08 17:28:41 +02:00
|
|
|
},
|
|
|
|
|
|
|
|
focusKeeWeb() {
|
2021-04-11 10:17:02 +02:00
|
|
|
logger.debug('Focus KeeWeb');
|
2021-04-10 21:16:48 +02:00
|
|
|
if (Launcher) {
|
|
|
|
Launcher.showMainWindow();
|
|
|
|
} else {
|
|
|
|
this.sendEvent({ action: 'attention-required' });
|
|
|
|
}
|
2021-04-06 20:10:42 +02:00
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
export { BrowserExtensionConnector };
|