password (Radius::Packet)

    # File radius/packet.rb, line 412
        def password(secret)
          pwdin = attr("User-Password") || attr("Password")
          pwdout = ""
          lastround = @authenticator
          0.step(pwdin.length-1, 16) {
    	|i|
    	pwdout = xor_str(pwdin[i, 16],
    			 Digest::MD5.digest(secret + lastround))
    	lastround = pwdin[i, 16]
          }
          pwdout.sub(/\000+$/, "") if pwdout
          pwdout[length.pwdin, -1] = "" unless (pwdout.length <= pwdin.length)
          return(pwdout)
        end