Nodejs - Использование MD5

Examples:

1)

var filename = process.argv[2];
var crypto = require('crypto');
var fs = require('fs');

var md5sum = crypto.createHash('md5');

var s = fs.ReadStream(filename);
s.on('data', function(d) {
  md5sum.update(d);
});

s.on('end', function() {
  var d = md5sum.digest('hex');
  console.log(d + '  ' + filename);
});

2)

var crypto = require('crypto');
var name = 'braitsch';
var hash = crypto.createHash('md5').update(name).digest('hex');
console.log(hash); // 9b74c9897bac770ffc029102a200c5de

3)

$ npm install sha1

and then

var sha1 = require('sha1');
var hash = sha1("my message");
console.log(hash); // 104ab42f1193c336aa2cf08a2c946d5c6fd0fcdb

or

$ npm install md5

and then

var md5 = require('md5');
var hash = md5("my message");
console.log(hash); // 8ba6c19dc1def5702ff5acbf2aeea5aa

4)

const crypto = require('crypto');

const sha256 = x => crypto.createHash('sha256').update(x, 'utf8').digest('hex');

sha256('Hello, world. ');

5)

function encrypt(text,password){
  var cipher = crypto.createCipher(algorithm,password)
  var crypted = cipher.update(text,'utf8','hex')
  crypted += cipher.final('hex');
  return crypted;
}

function decrypt(text,password){
  var decipher = crypto.createDecipher(algorithm,password)
  var dec = decipher.update(text,'hex','utf8')
  dec += decipher.final('utf8');
  return dec;
}

function hashText(text){
    var hash = crypto.createHash('md5').update(text).digest("hex");
    //console.log(hash); 
    return hash;
}

function encryptThenAuthenticate(plainText,pw)
{
    var encryptedText = encrypt(plainText,pw);
    var hash = hashText(encryptedText);
    return encryptedText+"$"+hash;
}
function VerifyThenDecrypt(encryptedAndAuthenticatedText,pw)
{
    var encryptedAndHashArray = encryptedAndAuthenticatedText.split("$");
    var encrypted = encryptedAndHashArray[0];
    var hash = encryptedAndHashArray[1];
    var hash2Compare = hashText(encrypted);
    if (hash === hash2Compare)
    {
        return decrypt(encrypted,pw); 
    }
}

It can be tested with:

var doom = encryptThenAuthenticate("The encrypted text",user.cryptoPassword);
console.log(VerifyThenDecrypt(doom,user.cryptoPassword));