Akka/Scala example source code file (Crypt.scala)

This example Akka source code file (Crypt.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Akka and Scala source code examples by using tags.

All credit for the original source code belongs to akka.io; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Akka tags/keywords

akka, array, ascii, crypt, md5, messagedigest, sha1, sha1prng, string, util

The Crypt.scala Akka example source code

/**
 * Copyright (C) 2009-2014 Typesafe Inc. <http://www.typesafe.com>
 */

package akka.util

import java.security.{ MessageDigest, SecureRandom }
//FIXME DOCS
object Crypt {
  val hex = "0123456789ABCDEF"
  val lineSeparator = System.getProperty("line.separator")

  lazy val random = SecureRandom.getInstance("SHA1PRNG")

  def md5(text: String): String = md5(unifyLineSeparator(text).getBytes("ASCII"))

  def md5(bytes: Array[Byte]): String = digest(bytes, MessageDigest.getInstance("MD5"))

  def sha1(text: String): String = sha1(unifyLineSeparator(text).getBytes("ASCII"))

  def sha1(bytes: Array[Byte]): String = digest(bytes, MessageDigest.getInstance("SHA1"))

  def generateSecureCookie: String = {
    val bytes = Array.fill(32)(0.byteValue)
    random.nextBytes(bytes)
    sha1(bytes)
  }

  def digest(bytes: Array[Byte], md: MessageDigest): String = {
    md.update(bytes)
    hexify(md.digest)
  }

  def hexify(bytes: Array[Byte]): String = {
    val builder = new java.lang.StringBuilder(bytes.length * 2)
    bytes.foreach { byte ⇒ builder.append(hex.charAt((byte & 0xF0) >> 4)).append(hex.charAt(byte & 0xF)) }
    builder.toString
  }

  private def unifyLineSeparator(text: String): String = text.replaceAll(lineSeparator, "\n")
}