416 lines
20 KiB
JavaScript
416 lines
20 KiB
JavaScript
/**
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* @description MeshCentral Script-Task
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* @author Ryan Blenis
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* @copyright
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* @license Apache-2.0
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*/
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'use strict';
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function CreateScriptTask(parent) {
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var obj = {};
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var db = require('SimpleDataStore').Shared();
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var pendingDownload = [];
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var debugFlag = false;
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var runningJobs = [];
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var runningJobPIDs = {};
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function dbg(str) {
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if (debugFlag !== true) return;
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var fs = require('fs');
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var logStream = fs.createWriteStream('scripttask.txt', { 'flags': 'a' });
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// use {'flags': 'a'} to append and {'flags': 'w'} to erase and write a new file
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logStream.write('\n' + new Date().toLocaleString() + ': ' + str);
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logStream.end('\n');
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}
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function removeFromArray(arr, from, to) {
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var rest = arr.slice((to || from) + 1 || arr.length);
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arr.length = from < 0 ? arr.length + from : from;
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return arr.push.apply(arr, rest);
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};
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obj.consoleAction = function(args, rights, sessionid, interactive) {
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//sendConsoleText('task: ' + JSON.stringify(args), sessionid); // Debug
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/*
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if (typeof args['_'] == 'undefined') {
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args['_'] = [];
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args['_'][1] = args.pluginaction; // TODO
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args['_'][2] = null;
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args['_'][3] = null;
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args['_'][4] = null;
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}
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*/
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var fnname = args['_'][0];
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if (fnname == null) { return "Valid task commands are: trigger, cache, clear, clearCache, debug, list"; }
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switch (fnname.toLowerCase()) {
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case 'trigger': {
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var jObj = {
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jobId: args.jobId,
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scriptId: args.scriptId,
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replaceVars: args.replaceVars,
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scriptHash: args.scriptHash,
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dispatchTime: args.dispatchTime
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};
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//dbg('jObj args is ' + JSON.stringify(jObj));
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var sObj = getScriptFromCache(jObj.scriptId);
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//dbg('sobj = ' + JSON.stringify(sObj) + ', shash = ' + jObj.scriptHash);
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if ((sObj == null) || (sObj.contentHash != jObj.scriptHash)) {
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// get from the server, then run
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//dbg('Getting and caching script '+ jObj.scriptId);
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parent.SendCommand({ action: 'script-task', subaction: 'getScript', scriptId: jObj.scriptId, sessionid: sessionid, tag: 'console' });
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pendingDownload.push(jObj);
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} else {
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// ready to run
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runScript(sObj, jObj, sessionid);
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}
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break;
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}
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case 'cache': {
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var sObj = args.script;
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cacheScript(sObj);
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var setRun = [];
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if (pendingDownload.length) {
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pendingDownload.forEach(function (pd, k) {
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if ((pd.scriptId == sObj._id) && (pd.scriptHash == sObj.contentHash)) {
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if (setRun.indexOf(pd) === -1) { runScript(sObj, pd, sessionid); setRun.push(pd); }
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removeFromArray(pendingDownload, k);
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}
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});
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}
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break;
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}
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case 'clear': {
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clearCache();
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parent.SendCommand({ action: 'script-task', subaction: 'clearAllPendingTasks', sessionid: sessionid, tag: 'console' });
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return "Cache cleared. All pending tasks cleared.";
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}
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case 'clearcache': {
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clearCache();
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return "The script cache has been cleared";
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}
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case 'debug': {
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debugFlag = (debugFlag) ? false : true;
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var str = (debugFlag) ? 'on' : 'off';
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return 'Debugging is now ' + str;
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}
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case 'list': {
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var ret = '';
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if (pendingDownload.length == 0) return "No tasks pending script download";
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pendingDownload.forEach(function (pd, k) { ret += 'Task ' + k + ': ' + 'TaskID: ' + pd.jobId + ' ScriptID: ' + pd.scriptId + '\r\n'; });
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return ret;
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}
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default: {
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dbg('Unknown action: ' + fnname + ' with data ' + JSON.stringify(args));
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break;
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}
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}
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}
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function finalizeJob(job, retVal, errVal, sessionid) {
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if (errVal != null && errVal.stack != null) errVal = errVal.stack;
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removeFromArray(runningJobs, runningJobs.indexOf(job.jobId));
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if (typeof runningJobPIDs[job.jobId] != 'undefined') delete runningJobPIDs[job.jobId];
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parent.SendCommand({
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action: 'script-task',
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subaction: 'taskComplete',
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jobId: job.jobId,
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scriptId: job.scriptId,
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retVal: retVal,
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errVal: errVal,
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dispatchTime: job.dispatchTime, // include original run time (long running tasks could have tried a re-send)
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sessionid: sessionid,
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tag: 'console'
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});
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}
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//@TODO Test powershell on *nix devices with and without powershell installed
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function runPowerShell(sObj, jObj, sessionid) {
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if (process.platform != 'win32') return runPowerShellNonWin(sObj, jObj);
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const fs = require('fs');
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var rand = Math.random().toString(32).replace('0.', '');
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var oName = 'st' + rand + '.txt';
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var pName = 'st' + rand + '.ps1';
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var pwshout = '', pwsherr = '', cancontinue = false;
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try {
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fs.writeFileSync(pName, sObj.content);
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var outstr = '', errstr = '';
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var child = require('child_process').execFile(process.env['windir'] + '\\system32\\WindowsPowerShell\\v1.0\\powershell.exe', ['-NoLogo']);
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child.stderr.on('data', function (chunk) { errstr += chunk; });
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child.stdout.on('data', function (chunk) { });
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runningJobPIDs[jObj.jobId] = child.pid;
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child.stdin.write('.\\' + pName + ' | Out-File ' + oName + ' -Encoding UTF8\r\n');
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child.on('exit', function (procRetVal, procRetSignal) {
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dbg('Exiting with ' + procRetVal + ', Signal: ' + procRetSignal);
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if (errstr != '') {
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finalizeJob(jObj, null, errstr, sessionid);
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try { fs.unlinkSync(oName); fs.unlinkSync(pName); } catch (ex) { dbg('Could not unlink files, error was: ' + ex); }
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return;
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}
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if (procRetVal == 1) {
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finalizeJob(jObj, null, 'Process terminated unexpectedly.', sessionid);
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try { fs.unlinkSync(oName); fs.unlinkSync(pName); } catch (ex) { dbg('Could not unlink files, error was: ' + ex); }
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return;
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}
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try { outstr = fs.readFileSync(oName, 'utf8').toString(); } catch (ex) { outstr = (procRetVal) ? 'Failure' : 'Success'; }
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if (outstr) {
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//outstr = outstr.replace(/[^\x20-\x7E]/g, '');
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try { outstr = outstr.trim(); } catch (ex) { }
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} else {
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outstr = (procRetVal) ? 'Failure' : 'Success';
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}
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dbg('Output is: ' + outstr);
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finalizeJob(jObj, outstr, null, sessionid);
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try { fs.unlinkSync(oName); fs.unlinkSync(pName); } catch (ex) { }
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});
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child.stdin.write('exit\r\n');
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//child.waitExit(); // this was causing the event loop to stall on long-running scripts, switched to '.on exit'
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} catch (ex) {
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dbg('Error block was (PowerShell): ' + ex);
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finalizeJob(jObj, null, ex, sessionid);
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}
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}
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function runPowerShellNonWin(sObj, jObj, sessionid) {
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const fs = require('fs');
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var rand = Math.random().toString(32).replace('0.', '');
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var path = '';
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var pathTests = ['/usr/local/mesh', '/tmp', '/usr/local/mesh_services/meshagent', '/var/tmp'];
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pathTests.forEach(function (p) { if (path == '' && fs.existsSync(p)) { path = p; } });
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dbg('Path chosen is: ' + path);
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path = path + '/';
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var oName = 'st' + rand + '.txt';
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var pName = 'st' + rand + '.ps1';
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var pwshout = '', pwsherr = '', cancontinue = false;
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try {
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var childp = require('child_process').execFile('/bin/sh', ['sh']);
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childp.stderr.on('data', function (chunk) { pwsherr += chunk; });
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childp.stdout.on('data', function (chunk) { pwshout += chunk; });
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childp.stdin.write('which pwsh' + '\n');
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childp.stdin.write('exit\n');
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childp.waitExit();
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} catch (ex) { finalizeJob(jObj, null, "Couldn't determine pwsh in env: " + ex, sessionid); }
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if (pwsherr != '') { finalizeJob(jObj, null, "PowerShell env determination error: " + pwsherr, sessionid); return; }
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if (pwshout.trim() != '') { cancontinue = true; }
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if (cancontinue === false) { finalizeJob(jObj, null, "PowerShell is not installed", sessionid); return; }
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try {
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fs.writeFileSync(path + pName, '#!' + pwshout + '\n' + sObj.content.split('\r\n').join('\n').split('\r').join('\n'));
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var outstr = '', errstr = '';
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var child = require('child_process').execFile('/bin/sh', ['sh']);
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child.stderr.on('data', function (chunk) { errstr += chunk; });
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child.stdout.on('data', function (chunk) { });
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runningJobPIDs[jObj.jobId] = child.pid;
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child.stdin.write('cd ' + path + '\n');
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child.stdin.write('chmod a+x ' + pName + '\n');
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child.stdin.write('./' + pName + ' > ' + oName + '\n');
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child.on('exit', function (procRetVal, procRetSignal) {
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if (errstr != '') {
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finalizeJob(jObj, null, errstr, sessionid);
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try {
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fs.unlinkSync(path + oName);
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fs.unlinkSync(path + pName);
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} catch (ex) { dbg('Could not unlink files, error was: ' + ex + ' for path ' + path); }
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return;
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}
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if (procRetVal == 1) {
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finalizeJob(jObj, null, 'Process terminated unexpectedly.', sessionid);
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try {
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fs.unlinkSync(path + oName);
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fs.unlinkSync(path + pName);
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} catch (ex) { dbg('Could not unlink files1, error was: ' + ex + ' for path ' + path); }
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return;
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}
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try { outstr = fs.readFileSync(path + oName, 'utf8').toString(); } catch (es) { outstr = (procRetVal) ? 'Failure' : 'Success'; }
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if (outstr) {
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//outstr = outstr.replace(/[^\x20-\x7E]/g, '');
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try { outstr = outstr.trim(); } catch (ex) { }
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} else {
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outstr = (procRetVal) ? 'Failure' : 'Success';
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}
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dbg('Output is: ' + outstr);
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finalizeJob(jObj, outstr, null, sessionid);
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try { fs.unlinkSync(path + oName); fs.unlinkSync(path + pName); } catch (ex) { dbg('Could not unlink files2, error was: ' + ex + ' for path ' + path); }
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});
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child.stdin.write('exit\n');
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} catch (ex) {
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dbg('Error block was (PowerShellNonWin): ' + ex);
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finalizeJob(jObj, null, ex, sessionid);
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}
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}
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function runBat(sObj, jObj, sessionid) {
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if (process.platform != 'win32') { finalizeJob(jObj, null, "Platform not supported.", sessionid); return; }
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const fs = require('fs');
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var rand = Math.random().toString(32).replace('0.', '');
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var oName = 'st' + rand + '.txt';
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var pName = 'st' + rand + '.bat';
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try {
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fs.writeFileSync(pName, sObj.content);
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var outstr = '', errstr = '';
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var child = require('child_process').execFile(process.env['windir'] + '\\system32\\cmd.exe');
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child.stderr.on('data', function (chunk) { errstr += chunk; });
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child.stdout.on('data', function (chunk) { });
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runningJobPIDs[jObj.jobId] = child.pid;
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child.stdin.write(pName + ' > ' + oName + '\r\n');
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child.stdin.write('exit\r\n');
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child.on('exit', function (procRetVal, procRetSignal) {
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if (errstr != '') {
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try { fs.unlinkSync(oName); fs.unlinkSync(pName); } catch (ex) { dbg('Could not unlink files, error was: ' + ex); }
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finalizeJob(jObj, null, errstr, sessionid);
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return;
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}
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if (procRetVal == 1) {
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try { fs.unlinkSync(oName); fs.unlinkSync(pName); } catch (ex) { dbg('Could not unlink files, error was: ' + ex); }
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finalizeJob(jObj, null, 'Process terminated unexpectedly.', sessionid);
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return;
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}
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try { outstr = fs.readFileSync(oName, 'utf8').toString(); } catch (ex) { outstr = (procRetVal) ? 'Failure' : 'Success'; }
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if (outstr) {
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//outstr = outstr.replace(/[^\x20-\x7E]/g, '');
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try { outstr = outstr.trim(); } catch (ex) { }
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} else {
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outstr = (procRetVal) ? 'Failure' : 'Success';
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}
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dbg('Output is: ' + outstr);
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try { fs.unlinkSync(oName); fs.unlinkSync(pName); } catch (ex) { dbg('Could not unlink files, error was: ' + ex); }
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finalizeJob(jObj, outstr, null, sessionid);
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});
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} catch (ex) {
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dbg('Error block was (BAT): ' + ex);
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finalizeJob(jObj, null, ex, sessionid);
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}
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}
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function runBash(sObj, jObj, sessionid) {
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if (process.platform == 'win32') { finalizeJob(jObj, null, "Platform not supported.", sessionid); return; }
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//dbg('proc is ' + JSON.stringify(process));
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const fs = require('fs');
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var path = '';
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var pathTests = ['/usr/local/mesh', '/tmp', '/usr/local/mesh_services/meshagent', '/var/tmp'];
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pathTests.forEach(function (p) {
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if (path == '' && fs.existsSync(p)) { path = p; }
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});
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dbg('Path chosen is: ' + path);
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path = path + '/';
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//var child = require('child_process');
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//child.execFile(process.env['windir'] + '\\system32\\cmd.exe', ['/c', 'RunDll32.exe user32.dll,LockWorkStation'], { type: 1 });
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var rand = Math.random().toString(32).replace('0.', '');
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var oName = 'st' + rand + '.txt';
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var pName = 'st' + rand + '.sh';
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try {
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fs.writeFileSync(path + pName, sObj.content);
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var outstr = '', errstr = '';
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var child = require('child_process').execFile('/bin/sh', ['sh']);
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child.stderr.on('data', function (chunk) { errstr += chunk; });
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child.stdout.on('data', function (chunk) { });
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runningJobPIDs[jObj.jobId] = child.pid;
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child.stdin.write('cd ' + path + '\n');
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child.stdin.write('chmod a+x ' + pName + '\n');
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child.stdin.write('./' + pName + ' > ' + oName + '\n');
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child.stdin.write('exit\n');
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child.on('exit', function (procRetVal, procRetSignal) {
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if (errstr != '') {
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try { fs.unlinkSync(path + oName); fs.unlinkSync(path + pName); } catch (ex) { dbg('Could not unlink files, error was: ' + ex + ' for path ' + path); }
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finalizeJob(jObj, null, errstr, sessionid);
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return;
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}
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if (procRetVal == 1) {
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try { fs.unlinkSync(path + oName); fs.unlinkSync(path + pName); } catch (ex) { dbg('Could not unlink files1, error was: ' + ex + ' for path ' + path); }
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finalizeJob(jObj, null, "Process terminated unexpectedly.", sessionid);
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return;
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}
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try { outstr = fs.readFileSync(path + oName, 'utf8').toString(); } catch (ex) { outstr = (procRetVal) ? 'Failure' : 'Success'; }
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if (outstr) {
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//outstr = outstr.replace(/[^\x20-\x7E]/g, '');
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try { outstr = outstr.trim(); } catch (ex) { }
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} else {
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outstr = (procRetVal) ? 'Failure' : 'Success';
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}
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dbg('Output is: ' + outstr);
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try { fs.unlinkSync(path + oName); fs.unlinkSync(path + pName); } catch (ex) { dbg('Could not unlink files2, error was: ' + ex + ' for path ' + path); }
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finalizeJob(jObj, outstr, null, sessionid);
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});
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} catch (ex) {
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dbg('Error block was (bash): ' + ex);
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finalizeJob(jObj, null, ex, sessionid);
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}
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}
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function jobIsRunning(jObj) {
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if (runningJobs.indexOf(jObj.jobId) === -1) return false;
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return true;
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}
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function runScript(sObj, jObj, sessionid) {
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// get current processes and clean running jobs if they are no longer running (computer fell asleep, user caused process to stop, etc.)
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if (process.platform != 'linux' && runningJobs.length) { // linux throws errors here in the meshagent for some reason
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require('process-manager').getProcesses(function (plist) {
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dbg('Got process list');
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dbg('There are currently ' + runningJobs.length + ' running jobs.');
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if (runningJobs.length) {
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runningJobs.forEach(function (jobId, idx) {
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dbg('Checking for running job: ' + jobId + ' with PID ' + runningJobPIDs[jobId]);
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if (typeof plist[runningJobPIDs[jobId]] == 'undefined' || typeof plist[runningJobPIDs[jobId]].cmd != 'string') {
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dbg('Found job with no process. Removing running status.');
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delete runningJobPIDs[jobId];
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removeFromArray(runningJobs, runningJobs.indexOf(idx));
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//dbg('RunningJobs: ' + JSON.stringify(runningJobs));
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//dbg('RunningJobsPIDs: ' + JSON.stringify(runningJobPIDs));
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}
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});
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}
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});
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}
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if (jobIsRunning(jObj)) { dbg('Job already running job id [' + jObj.jobId + ']. Skipping.'); return; }
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if (jObj.replaceVars != null) {
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Object.getOwnPropertyNames(jObj.replaceVars).forEach(function (key) {
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var val = jObj.replaceVars[key];
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sObj.content = sObj.content.replace(new RegExp('#' + key + '#', 'g'), val);
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dbg('replacing var ' + key + ' with ' + val);
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});
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sObj.content = sObj.content.replace(new RegExp('#(.*?)#', 'g'), 'VAR_NOT_FOUND');
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}
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runningJobs.push(jObj.jobId);
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dbg('Running Script ' + sObj._id);
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switch (sObj.filetype) {
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case 'ps1': runPowerShell(sObj, jObj, sessionid); break;
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case 'bat': runBat(sObj, jObj, sessionid); break;
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case 'bash': runBash(sObj, jObj, sessionid); break;
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default: dbg('Unknown filetype: ' + sObj.filetype); break;
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}
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}
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function getScriptFromCache(id) {
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var script = db.Get('scriptTask_script_' + id);
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if (script == '' || script == null) return null;
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try { script = JSON.parse(script); } catch (ex) { return null; }
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return script;
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}
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function cacheScript(sObj) {
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db.Put('scriptTask_script_' + sObj._id, sObj);
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}
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function clearCache() {
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db.Keys.forEach(function (k) { if (k.indexOf('scriptTask_script_') === 0) { db.Put(k, null); db.Delete(k); } });
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}
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function sendConsoleText(text, sessionid) {
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if (typeof text == 'object') { text = JSON.stringify(text); }
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parent.SendCommand({ action: 'msg', type: 'console', value: 'XXX: ' + text, sessionid: sessionid });
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}
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return obj;
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}
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module.exports = { CreateScriptTask: CreateScriptTask }; |