Encryption and Decryption Using C

Encryption & Decryption Using C

#include <stdio.h>

#include <string.h>

void encrypt(char str[],int key)

{

    unsigned int i;

    for(i=0;i<strlen(str);++i)

    {

          str[i] = str[i] - key;

    }

}

void decrypt(char str[],int key)

{

    unsigned int i;

    for(i=0;i<strlen(str);++i)

    {

          str[i] = str[i] + key;

    }

}

int main()

{

     char str[] = "smurffANDkdo";

     printf("Passwrod     = %s\n",str);

     encrypt(str,0xFACA);

     printf("Encrypted value = %s\n",str);     

     decrypt(str,0xFACA);

     printf("Decrypted value = %s\n",str);

     return 0;

}