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#ifndef RC4_H
#define RC4_H
#define PASS_MAX 32
#define BACKSPACE 127
#define KEY_SCHEDULE_LENGTH 256
#include <stdlib.h>
#include <string.h>
#include <ncurses.h>
/**
* Takes a password from user input and returns it (max 32 chars)
* @return password
*/
char* rc4_getPassword(void);
/**
* Performs key exchange
* @param keySchedule
* @param key password
*/
void rc4_key_exchange(int keySchedule[KEY_SCHEDULE_LENGTH], char* key);
/**
* Performs pseudo-random generation algorithm
* @param keySchedule
* @param len size of portfolio in bytes
* @return string that can be XOR'ed with message to be en/decoded
*/
char* rc4_prga(int keySchedule[KEY_SCHEDULE_LENGTH], size_t len);
/**
* XOR's the string created by prga by the portfolio to encrypt or decrypt it
* @param output string to be XOR'ed
* @param message portoflio string
* @param len length of portfolio in bytes
*/
void rc4_execute(char* output, char* message, size_t len);
#endif
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