MD5 hashing

md5.coffee

crypto = require('crypto');

#Quick MD5 of text
text = "MD5 this text!"
md5hash1 = crypto.createHash('md5').update(text).digest("hex")

#MD5 of text with updates
m = crypto.createHash('md5') 
m.update("MD5 ")
m.update("this ")
m.update("text!")
md5hash2 = m.digest("hex")

#Output
console.log "#{md5hash1} should be the same as #{md5hash2}"

md5.dart

import 'dart:crypto';

void main() {
 
  //Quick MD5 of text
  var text = "MD5 this text!";
  var md5hash1 = CryptoUtils.bytesToHex((new MD5()..add(text.codeUnits)).close());
  
  //MD5 of text with updates
  var m = new MD5();
  m.add("MD5 ".codeUnits);
  m.add("this ".codeUnits);
  m.add("text!".codeUnits);
  var md5hash2 = CryptoUtils.bytesToHex(m.close());
  
  //Output
  print("${md5hash1} should be the same as ${md5hash2}");
}

md5.groovy

import java.security.MessageDigest
 
def digest = MessageDigest.getInstance("MD5")
 
//Quick MD5 of text
def text = "MD5 this text!"
def md5hash1 = new BigInteger(1,digest.digest(text.getBytes())).toString(16).padLeft(32,"0")
 
//MD5 of text with updates
digest.update("MD5 ".getBytes())
digest.update("this ".getBytes())
digest.update("text!".getBytes())
def md5hash2 = new BigInteger(1,digest.digest()).toString(16).padLeft(32,"0")
 
//Output
print "${md5hash1} should be the same as ${md5hash2}"

md5.pl

use Digest::MD5  qw(md5 md5_hex md5_base64);

#Quick MD5 of text
my $text = "MD5 this text!";
my $md5hash1 = md5_hex( $text );

#MD5 of text with updates
$md5 = Digest::MD5->new;
$md5->add("MD5 ");
$md5->add("this ");
$md5->add("text!");
$md5hash2 = $md5->hexdigest;

#Output
print "$md5hash1 should be the same as $md5hash2\n";

md5.py

import hashlib
 
#Quick MD5 of text
text = "MD5 this text!"
md5hash1 = hashlib.md5(text).hexdigest()
 
#MD5 of text with updates
m = hashlib.md5()
m.update("MD5 ")
m.update("this ")
m.update("text!")
md5hash2 = m.hexdigest()
 
#Output
print("%s should be the same as %s" % (md5hash1, md5hash2))

md5.rb

require 'digest/md5'
 
#Quick MD5 of text
text = "MD5 this text!"
md5hash1 = Digest::MD5.hexdigest(text)
 
#MD5 of text with updates
m = Digest::MD5.new()
m << "MD5 "
m << "this "
m << "text!"
md5hash2 = m.hexdigest()
 
#Output
puts "#{md5hash1} should be the same as #{md5hash2}"

md5.scala

import java.security.MessageDigest
 
val digest = MessageDigest.getInstance("MD5")
 
//Quick MD5 of text
val text = "MD5 this text!"
val md5hash1 = digest.digest(text.getBytes).map("%02x".format(_)).mkString

//MD5 of text with updates
digest.update("MD5 ".getBytes())
digest.update("this ".getBytes())
digest.update("text!".getBytes())
val md5hash2 = digest.digest().map(0xFF & _).map("%02x".format(_)).mkString
 
//Output
println(md5hash1 + " should be the same as " + md5hash2)

Regarding the scala version, wouldn't the following be enough?

digest.digest(text.getBytes).map("%02x".format(_)).mkString

Yup, that seems to work and looks a lot better!