RC4

Header file

#include "mln_rc.h"

Module

rc

Functions

mln_rc4_init

void mln_rc4_init(mln_u8ptr_t s, mln_u8ptr_t key, mln_uauto_t len);

Description: The parameter s required to initialize RC4. key is the key content and len is the key length. s must be a 256-byte long memory area initialized to 0.

Return value: none

mln_rc4_calc

void mln_rc4_calc(mln_u8ptr_t s, mln_u8ptr_t data, mln_uauto_t len);

Description: Perform RC4 encryption and decryption. s is the parameter initialized by mln_rc4_init. data is the encrypted or decrypted data, len is the length of data.

The result of encryption and decryption will be directly written back to data, so pay attention to the writability of data memory area.

Return value: none

Example

#include <stdio.h>
#include <stdlib.h>
#include "mln_rc.h"

int main(int argc, char *argv[])
{
    mln_u8_t s[256] = {0};
    mln_u8_t text[] = "Hello";

    mln_rc4_init(s, (mln_u8ptr_t)"this is a key", sizeof("this is a key")-1);
    mln_rc4_calc(s, text, sizeof(text)-1);
    printf("%s\n", text);
    mln_rc4_calc(s, text, sizeof(text)-1);
    printf("%s\n", text);

    return 0;
}