From: Joshua Mckinney <joshmckin@...>
Date: 2010-07-02T07:38:43+09:00
Subject: Re: Mimic AES_ENCRYPT and AES_DECRYPT functions in Ruby

Awesome, could not find .pack in the 1.9.1 documentation. Everything is 
now working.

Here is all the code for 1.9.1:


  def mysql_encrypt(s, key=@key)
    encrypt(s, mysql_key(key))
  end

  def mysql_decrypt(s, key=@key)
    puts s
    decrypt(s, mysql_key(key))
  end

  protected
  def aes(m,k,t)
    c = OpenSSL::Cipher::Cipher.new('aes-128-ecb').send(m)
    c.key = k
    c.update(t) + c.final

  end

  def encrypt(text, key)
    aes(:encrypt, key, text).unpack("H*")
  end

  def decrypt(text, key)
    aes(:decrypt, key, [text].pack("H*"))
  end

  def mysql_key(key)

    final_key = "\0" * 16
    key.length.times do |i|
      final_key[i%16] = (final_key[i%16].ord ^ key[i].ord).chr
    end
   final_key
  end


Thanks for you help Rob



Rob Biedenharn wrote:
> ["9eb667b7f0f89f204dc182a0fcef5b6859ec5d3de655e86ffb4ecd92399af4b5
> "].pack("H*")
> => "\x9E\xB6g\xB7\xF0\xF8\x9F M\xC1\x82\xA0\xFC\xEF[hY\xEC]=\xE6U\xE8o
> \xFBN\xCD\x929\x9A\xF4\xB5"
> 
> Rob Biedenharn
> http://agileconsultingllc.com
>   Rob@AgileConsultingLLC.com
> http://gaslightsoftware.com
>   rab@GaslightSoftware.com

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