Ruby下使用OpenSSL lib DES對稱式加密輸出

Sample Code如下：
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#!/usr/bin/ruby
require "openssl"

class Encrypt
  KEY = "abcdefghijklmnopqrstuvwxyz"
  IV = "asdasdasdasdasdasdasdasdas"
  CIPHER = "DES" #CIPHER是使用的加密方法
  def des_encrypt(plaintext)
    c = OpenSSL::Cipher::Cipher.new(CIPHER)
    c.encrypt
    c.key = KEY
    c.iv = IV
    ret = c.update(plaintext)
    ret << c.final
  end
  def des_decrypt(encrypt_value)
    c = OpenSSL::Cipher::Cipher.new(CIPHER)
    c.decrypt
    c.key = KEY
    c.iv = IV
    ret = c.update(encrypt_value)
    ret << c.final
  end
end

def gotorun
  e = Encrypt.new
  source = "a secret message"
  puts "source    :#{source}"
  value = e.des_encrypt(source)
  puts "encode    :#{value}"
  puts "encode hex:#{value.unpack('H*')[0]}"
  puts "decode hex:#{[value.unpack('H*')[0]].pack('H*')}"
  des_decrypt = e.des_decrypt(value)
  puts "decode    :#{des_decrypt}"
end
gotorun
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