chore: lint ./app/server/socket.js #242
This commit is contained in:
Bill Church
parent
3d7e1d68cd
commit
545d503e91
1 changed files with 136 additions and 129 deletions
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@ -1,136 +1,172 @@
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/* eslint-disable complexity */
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'use strict'
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/* eslint no-unused-expressions: ["error", { "allowShortCircuit": true, "allowTernary": true }],
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no-console: ["error", { allow: ["warn", "error"] }] */
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/* jshint esversion: 6, asi: true, node: true */
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// socket.js
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// private
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var debug = require('debug')
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var debugWebSSH2 = require('debug')('WebSSH2')
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var SSH = require('ssh2').Client
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var CIDRMatcher = require('cidr-matcher')
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const debug = require('debug');
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const debugWebSSH2 = require('debug')('WebSSH2');
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const SSH = require('ssh2').Client;
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const CIDRMatcher = require('cidr-matcher');
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// var fs = require('fs')
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// var hostkeys = JSON.parse(fs.readFileSync('./hostkeyhashes.json', 'utf8'))
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var termCols, termRows
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var menuData = '<a id="logBtn"><i class="fas fa-clipboard fa-fw"></i> Start Log</a>' +
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'<a id="downloadLogBtn"><i class="fas fa-download fa-fw"></i> Download Log</a>'
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let termCols;
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let termRows;
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const menuData = '<a id="logBtn"><i class="fas fa-clipboard fa-fw"></i> Start Log</a>'
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+ '<a id="downloadLogBtn"><i class="fas fa-download fa-fw"></i> Download Log</a>';
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// public
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module.exports = function socket (socket) {
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module.exports = function appSocket(socket) {
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// if websocket connection arrives without an express session, kill it
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if (!socket.request.session) {
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socket.emit('401 UNAUTHORIZED')
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debugWebSSH2('SOCKET: No Express Session / REJECTED')
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socket.disconnect(true)
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return
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socket.emit('401 UNAUTHORIZED');
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debugWebSSH2('SOCKET: No Express Session / REJECTED');
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socket.disconnect(true);
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return;
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}
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function SSHerror(myFunc, err) {
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let theError;
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if (socket.request.session) {
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// we just want the first error of the session to pass to the client
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const firstError = (socket.request.session.error)
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|| ((err) ? err.message : undefined);
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theError = (firstError) ? `: ${firstError}` : '';
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// log unsuccessful login attempt
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if (err && (err.level === 'client-authentication')) {
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console.error(`WebSSH2 ${'error: Authentication failure'.red.bold
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} user=${socket.request.session.username.yellow.bold.underline
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} from=${socket.handshake.address.yellow.bold.underline}`);
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socket.emit('allowreauth', socket.request.session.ssh.allowreauth);
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socket.emit('reauth');
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} else {
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// eslint-disable-next-line no-console
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console.log(`WebSSH2 Logout: user=${socket.request.session.username} from=${socket.handshake.address} host=${socket.request.session.ssh.host} port=${socket.request.session.ssh.port} sessionID=${socket.request.sessionID}/${socket.id} allowreplay=${socket.request.session.ssh.allowreplay} term=${socket.request.session.ssh.term}`);
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if (err) {
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theError = (err) ? `: ${err.message}` : '';
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console.error(`WebSSH2 error${theError}`);
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}
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}
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socket.emit('ssherror', `SSH ${myFunc}${theError}`);
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socket.request.session.destroy();
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socket.disconnect(true);
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} else {
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theError = (err) ? `: ${err.message}` : '';
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socket.disconnect(true);
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}
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debugWebSSH2(`SSHerror ${myFunc}${theError}`);
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}
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// If configured, check that requsted host is in a permitted subnet
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if ((((socket.request.session || {}).ssh || {}).allowedSubnets || {}).length && (socket.request.session.ssh.allowedSubnets.length > 0)) {
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var matcher = new CIDRMatcher(socket.request.session.ssh.allowedSubnets)
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if ((((socket.request.session || {}).ssh || {}).allowedSubnets || {}).length
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&& (socket.request.session.ssh.allowedSubnets.length > 0)) {
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const matcher = new CIDRMatcher(socket.request.session.ssh.allowedSubnets);
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if (!matcher.contains(socket.request.session.ssh.host)) {
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console.log('WebSSH2 ' + 'error: Requested host outside configured subnets / REJECTED'.red.bold +
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' user=' + socket.request.session.username.yellow.bold.underline +
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' from=' + socket.handshake.address.yellow.bold.underline)
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socket.emit('ssherror', '401 UNAUTHORIZED')
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socket.disconnect(true)
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return
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console.error(`WebSSH2 ${'error: Requested host outside configured subnets / REJECTED'.red.bold
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} user=${socket.request.session.username.yellow.bold.underline
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} from=${socket.handshake.address.yellow.bold.underline}`);
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socket.emit('ssherror', '401 UNAUTHORIZED');
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socket.disconnect(true);
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return;
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}
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}
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var conn = new SSH()
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socket.on('geometry', function socketOnGeometry (cols, rows) {
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termCols = cols
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termRows = rows
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})
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conn.on('banner', function connOnBanner (data) {
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const conn = new SSH();
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socket.on('geometry', (cols, rows) => {
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termCols = cols;
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termRows = rows;
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});
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conn.on('banner', (data) => {
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// need to convert to cr/lf for proper formatting
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data = data.replace(/\r?\n/g, '\r\n')
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socket.emit('data', data.toString('utf-8'))
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})
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socket.emit('data', data.replace(/\r?\n/g, '\r\n').toString('utf-8'));
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});
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conn.on('ready', function connOnReady () {
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console.log('WebSSH2 Login: user=' + socket.request.session.username + ' from=' + socket.handshake.address + ' host=' + socket.request.session.ssh.host + ' port=' + socket.request.session.ssh.port + ' sessionID=' + socket.request.sessionID + '/' + socket.id + ' mrhsession=' + socket.request.session.ssh.mrhsession + ' allowreplay=' + socket.request.session.ssh.allowreplay + ' term=' + socket.request.session.ssh.term)
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socket.emit('menu', menuData)
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socket.emit('allowreauth', socket.request.session.ssh.allowreauth)
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socket.emit('setTerminalOpts', socket.request.session.ssh.terminal)
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socket.emit('title', 'ssh://' + socket.request.session.ssh.host)
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if (socket.request.session.ssh.header.background) socket.emit('headerBackground', socket.request.session.ssh.header.background)
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if (socket.request.session.ssh.header.name) socket.emit('header', socket.request.session.ssh.header.name)
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socket.emit('footer', 'ssh://' + socket.request.session.username + '@' + socket.request.session.ssh.host + ':' + socket.request.session.ssh.port)
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socket.emit('status', 'SSH CONNECTION ESTABLISHED')
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socket.emit('statusBackground', 'green')
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socket.emit('allowreplay', socket.request.session.ssh.allowreplay)
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conn.on('ready', () => {
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debugWebSSH2(`WebSSH2 Login: user=${socket.request.session.username} from=${socket.handshake.address} host=${socket.request.session.ssh.host} port=${socket.request.session.ssh.port} sessionID=${socket.request.sessionID}/${socket.id} mrhsession=${socket.request.session.ssh.mrhsession} allowreplay=${socket.request.session.ssh.allowreplay} term=${socket.request.session.ssh.term}`);
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socket.emit('menu', menuData);
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socket.emit('allowreauth', socket.request.session.ssh.allowreauth);
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socket.emit('setTerminalOpts', socket.request.session.ssh.terminal);
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socket.emit('title', `ssh://${socket.request.session.ssh.host}`);
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if (socket.request.session.ssh.header.background) socket.emit('headerBackground', socket.request.session.ssh.header.background);
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if (socket.request.session.ssh.header.name) socket.emit('header', socket.request.session.ssh.header.name);
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socket.emit('footer', `ssh://${socket.request.session.username}@${socket.request.session.ssh.host}:${socket.request.session.ssh.port}`);
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socket.emit('status', 'SSH CONNECTION ESTABLISHED');
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socket.emit('statusBackground', 'green');
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socket.emit('allowreplay', socket.request.session.ssh.allowreplay);
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conn.shell({
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term: socket.request.session.ssh.term,
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cols: termCols,
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rows: termRows
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}, function connShell (err, stream) {
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rows: termRows,
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}, (err, stream) => {
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if (err) {
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SSHerror('EXEC ERROR' + err)
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conn.end()
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return
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SSHerror(`EXEC ERROR${err}`);
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conn.end();
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return;
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}
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// poc to log commands from client
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if (socket.request.session.ssh.serverlog.client) var dataBuffer
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socket.on('data', function socketOnData (data) {
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stream.write(data)
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// if (socket.request.session.ssh.serverlog.client) var dataBuffer;
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socket.on('data', (data) => {
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stream.write(data);
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// poc to log commands from client
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if (socket.request.session.ssh.serverlog.client) {
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/* if (socket.request.session.ssh.serverlog.client) {
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if (data === '\r') {
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console.log('serverlog.client: ' + socket.request.session.id + '/' + socket.id + ' host: ' + socket.request.session.ssh.host + ' command: ' + dataBuffer)
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dataBuffer = undefined
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console.log(`serverlog.client: ${socket.request.session.id}/${socket.id}
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host: ${socket.request.session.ssh.host} command: ${dataBuffer}`);
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dataBuffer = undefined;
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} else {
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dataBuffer = (dataBuffer) ? dataBuffer + data : data
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dataBuffer = (dataBuffer) ? dataBuffer + data : data;
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}
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}
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})
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socket.on('control', function socketOnControl (controlData) {
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} */
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});
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socket.on('control', (controlData) => {
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switch (controlData) {
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case 'replayCredentials':
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if (socket.request.session.ssh.allowreplay) {
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stream.write(socket.request.session.userpassword + '\n')
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stream.write(`${socket.request.session.userpassword}\n`);
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}
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/* falls through */
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default:
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console.log('controlData: ' + controlData)
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debugWebSSH2(`controlData: ${controlData}`);
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}
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})
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socket.on('resize', function socketOnResize (data) {
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stream.setWindow(data.rows, data.cols)
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})
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socket.on('disconnecting', function socketOnDisconnecting (reason) { debugWebSSH2('SOCKET DISCONNECTING: ' + reason) })
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socket.on('disconnect', function socketOnDisconnect (reason) {
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debugWebSSH2('SOCKET DISCONNECT: ' + reason)
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err = { message: reason }
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SSHerror('CLIENT SOCKET DISCONNECT', err)
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conn.end()
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});
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socket.on('resize', (data) => {
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stream.setWindow(data.rows, data.cols);
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});
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socket.on('disconnecting', (reason) => { debugWebSSH2(`SOCKET DISCONNECTING: ${reason}`); });
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socket.on('disconnect', (reason) => {
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debugWebSSH2(`SOCKET DISCONNECT: ${reason}`);
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const errMsg = { message: reason };
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SSHerror('CLIENT SOCKET DISCONNECT', errMsg);
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conn.end();
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// socket.request.session.destroy()
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})
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socket.on('error', function socketOnError (err) {
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SSHerror('SOCKET ERROR', err)
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conn.end()
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})
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});
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socket.on('error', (errMsg) => {
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SSHerror('SOCKET ERROR', errMsg);
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conn.end();
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});
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stream.on('data', function streamOnData (data) { socket.emit('data', data.toString('utf-8')) })
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stream.on('close', function streamOnClose (code, signal) {
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err = { message: ((code || signal) ? (((code) ? 'CODE: ' + code : '') + ((code && signal) ? ' ' : '') + ((signal) ? 'SIGNAL: ' + signal : '')) : undefined) }
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SSHerror('STREAM CLOSE', err)
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conn.end()
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})
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stream.stderr.on('data', function streamStderrOnData (data) {
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console.log('STDERR: ' + data)
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})
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})
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})
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stream.on('data', (data) => { socket.emit('data', data.toString('utf-8')); });
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stream.on('close', (code, signal) => {
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const errMsg = { message: ((code || signal) ? (((code) ? `CODE: ${code}` : '') + ((code && signal) ? ' ' : '') + ((signal) ? `SIGNAL: ${signal}` : '')) : undefined) };
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SSHerror('STREAM CLOSE', errMsg);
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conn.end();
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});
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stream.stderr.on('data', (data) => {
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console.error(`STDERR: ${data}`);
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});
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});
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});
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conn.on('end', function connOnEnd (err) { SSHerror('CONN END BY HOST', err) })
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conn.on('close', function connOnClose (err) { SSHerror('CONN CLOSE', err) })
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conn.on('error', function connOnError (err) { SSHerror('CONN ERROR', err) })
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conn.on('keyboard-interactive', function connOnKeyboardInteractive (name, instructions, instructionsLang, prompts, finish) {
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debugWebSSH2('conn.on(\'keyboard-interactive\')')
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finish([socket.request.session.userpassword])
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})
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if (socket.request.session.username && (socket.request.session.userpassword || socket.request.session.privatekey) && socket.request.session.ssh) {
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conn.on('end', (err) => { SSHerror('CONN END BY HOST', err); });
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conn.on('close', (err) => { SSHerror('CONN CLOSE', err); });
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conn.on('error', (err) => { SSHerror('CONN ERROR', err); });
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conn.on('keyboard-interactive', (name, instructions, instructionsLang, prompts, finish) => {
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debugWebSSH2('conn.on(\'keyboard-interactive\')');
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finish([socket.request.session.userpassword]);
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});
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if (socket.request.session.username
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&& (socket.request.session.userpassword || socket.request.session.privatekey)
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&& socket.request.session.ssh) {
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// console.log('hostkeys: ' + hostkeys[0].[0])
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conn.connect({
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host: socket.request.session.ssh.host,
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@ -145,13 +181,13 @@ module.exports = function socket (socket) {
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readyTimeout: socket.request.session.ssh.readyTimeout,
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keepaliveInterval: socket.request.session.ssh.keepaliveInterval,
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keepaliveCountMax: socket.request.session.ssh.keepaliveCountMax,
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debug: debug('ssh2')
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})
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debug: debug('ssh2'),
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});
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} else {
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debugWebSSH2('Attempt to connect without session.username/password or session varialbles defined, potentially previously abandoned client session. disconnecting websocket client.\r\nHandshake information: \r\n ' + JSON.stringify(socket.handshake))
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socket.emit('ssherror', 'WEBSOCKET ERROR - Refresh the browser and try again')
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socket.request.session.destroy()
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socket.disconnect(true)
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debugWebSSH2(`Attempt to connect without session.username/password or session varialbles defined, potentially previously abandoned client session. disconnecting websocket client.\r\nHandshake information: \r\n ${JSON.stringify(socket.handshake)}`);
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socket.emit('ssherror', 'WEBSOCKET ERROR - Refresh the browser and try again');
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socket.request.session.destroy();
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socket.disconnect(true);
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}
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/**
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@ -161,33 +197,4 @@ module.exports = function socket (socket) {
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* @param {object} err error object or error message
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*/
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// eslint-disable-next-line complexity
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function SSHerror (myFunc, err) {
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var theError
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if (socket.request.session) {
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// we just want the first error of the session to pass to the client
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socket.request.session.error = (socket.request.session.error) || ((err) ? err.message : undefined)
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theError = (socket.request.session.error) ? ': ' + socket.request.session.error : ''
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// log unsuccessful login attempt
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if (err && (err.level === 'client-authentication')) {
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console.log('WebSSH2 ' + 'error: Authentication failure'.red.bold +
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' user=' + socket.request.session.username.yellow.bold.underline +
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' from=' + socket.handshake.address.yellow.bold.underline)
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socket.emit('allowreauth', socket.request.session.ssh.allowreauth)
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socket.emit('reauth')
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} else {
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console.log('WebSSH2 Logout: user=' + socket.request.session.username + ' from=' + socket.handshake.address + ' host=' + socket.request.session.ssh.host + ' port=' + socket.request.session.ssh.port + ' sessionID=' + socket.request.sessionID + '/' + socket.id + ' allowreplay=' + socket.request.session.ssh.allowreplay + ' term=' + socket.request.session.ssh.term)
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if (err) {
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theError = (err) ? ': ' + err.message : ''
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console.log('WebSSH2 error' + theError)
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}
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}
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socket.emit('ssherror', 'SSH ' + myFunc + theError)
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socket.request.session.destroy()
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socket.disconnect(true)
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} else {
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theError = (err) ? ': ' + err.message : ''
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socket.disconnect(true)
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}
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debugWebSSH2('SSHerror ' + myFunc + theError)
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}
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}
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};
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