#include "magx_keyGenerator.h"
#include "magx_Decryptor.h"
#include "math.h"

String MeterID="24217303072";
float units=0;
String plainText="";
String cipherText="";
String keyArray[3];
int key;
void setup() {
Serial.begin(9600);
  String inp=Input();
  
  key=inp.substring(16).toInt();

  cipherText=inp.substring(0,16);
  //plainText=Decryption(cipherText,keygen); this was for single DES
 
 
  // 3DES
  plainText=TripleDES_Decryption(cipherText);

  String meter=plainText.substring(0,11);
  units=float(plainText.substring(11).toInt()/100.0);
  
  if (meter==MeterID){
    Serial.println("\t...........Successful Decryption....... ");
    Serial.print("meter Number :  ");
    Serial.println(meter);
    Serial.print("Units :  ");
    Serial.println(units);
  }
  else{
    Serial.println("\t........Rejected, Invalid Token.......... ");
  }
}




void loop() {
  
}
String TripleDES_Decryption(String cipher){

   // 3DES KEYS////////////////////////
    for (int i=0;i<3;i++){
    keyArray[i]=keyGenerated(key);
    key=keyArray[i].substring(0,4).toInt();
    //Serial.println(keyArray[i]);
  }
  
  //////////////////////////////////////
    return processDES(processDES(processDES(cipher,keyArray[2],true),keyArray[1],false),keyArray[0],true);
}