pekko/scripts/generate_config_with_secure_cookie.sh

#!/bin/sh
exec scala "$0" "$@"
!#

/**
 * Copyright (C) 2009-2010 Scalable Solutions AB <http://scalablesolutions.se>
 */
import java.security.{MessageDigest, SecureRandom}

/**
 * @author <a href="http://jonasboner.com">Jonas Bon&#233;r</a>
 */
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 StringBuilder
    bytes.foreach { byte => builder.append(hex.charAt((byte & 0xF) >> 4)).append(hex.charAt(byte & 0xF)) }
    builder.toString
  }

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

print("""
# This config imports the Akka reference configuration.
include "akka-reference.conf"

# In this file you can override any option defined in the 'akka-reference.conf' file.
# Copy in all or parts of the 'akka-reference.conf' file and modify as you please.

akka {
  remote {
    secure-cookie = """")
print(Crypt.generateSecureCookie)
print(""""
  }
}
""")