utils.js

utils.validateKeystore = function (path, keystore, passwd, alias) {
	if (typeof path === 'undefined') {
		path = ".";
	}

	var deferred = Q.defer();

	// check file extension
	if (keystore.indexOf(".keystore") == -1) {
		keystore += ".keystore";
	}

	// check if file exists
	if (!fs.existsSync(path + '/' + keystore)) {
		console.error("Keystore " + keystore + " not found");
		deferred.reject("Keystore " + keystore + " not found");
	}

	var proc = spawn('keytool', [
		'-list',
		'-keystore',
		path + '/' + keystore,
		'-alias',
		alias,
		'-storepass',
		passwd,
		'-v'

	]);

	var grepCommand = spawn('egrep', ['Alias|Valid|Válido']);

	var result = "";

	proc.stdout.pipe(grepCommand.stdin);


	grepCommand.stdout.on('data', function (data) {
		//console.log('' + data);
		result += data;
	});

	grepCommand.stderr.on('data', function (data) {
		console.log('grep stderr: ' + data);
	});

	grepCommand.on('close', function (code) {
		if (code === 0) {
			var dateFinish = result.replace(/([^]*)(hasta: )([^\n]*)(\n)([^]*)/gm, "$3");
			console.log("DATE: " + dateFinish);
			console.log("keystore is valid");
			deferred.resolve();
		} else {
			console.error("Error validating keystore");
			deferred.reject("Error validating keystore");
		}
	});

	grepCommand.on('error', function (error) {
		console.log("ERROR:" + error);
		deferred.reject("ERROR:" + error);
	});

	return deferred.promise;
};