set_password (Radius::Packet)

    # File radius/packet.rb, line 438
        def set_password(pwdin, secret)
          lastround = @authenticator
          pwdout = ""
          # pad to 16n bytes
          pwdin += "\000" * (15-(15 + pwdin.length) % 16)
          0.step(pwdin.length-1, 16) {
    	|i|
    	lastround = xor_str(pwdin[i, 16],
    			    Digest::MD5.digest(secret + lastround))
    	pwdout += lastround
          }
          set_attr("User-Password", pwdout)
          return(pwdout)
        end