Where is the problem in my code?

Projects Programming
1

Hi my friend,

I'm newbie for arduino programming. I am trying for encrytion some string with xor algorithm. But when i uploaded my to arduino and after then open serial monitor i see nothing happen.

I don't find my problem where it is.

This is my code. I found it one website :

#include <SD.h>
void setup()

{

String str, encrypted, decrypted;

str ="write_anything";

encrypted = XOREncryption(str, 12); // storing the encrypted string
decrypted = XORDecryption(encrypted, 12);

Serial.println(encrypted);

}

String XOREncryption(String str, int key)
{
String enc("");
for (unsigned int i(0); i < str.length(); i++) // iterates through the string to encrypt
enc += str ^ key; // ^ - XOR operator in C++

  • return enc;*
    }
    String XORDecryption(String str, int key)
    {
  • String dec("");*
    for (unsigned int i(0); i < str.length(); i++)// iterates through the string to decrypt
    _ dec += str ^ key; // ^ - XOR operator in C++_
    * return dec;*
    }
    void loop()
    {

}
Thanks for your attention.
Best regards.

2

Serial.begin(9600) would be a good place to start.

3

Adding Serial.println("Hello world"); after that would be a good next move. It will verify that your basic connections is working, before you start worrying about your stoopid encryption.

4

Thank you so much michinyon. It is working very well with your help.

5 
for (unsigned int i(0); i < str.length(); i++)// iterates through the string to decrypt
        dec += str ^ key; // ^ - XOR operator in C++

I think you want to xor the i'th character, not the string object!

I wouldn't call this encryption, its encoding. Encryption uses a secret key.