mirror of https://github.com/dirtbags/moth.git
41 lines
1.0 KiB
C
41 lines
1.0 KiB
C
|
#ifndef __ARC4_H__
|
||
|
|
#define __ARC4_H__
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
|
||
|
|
#define ARC4_KEYLEN 256
|
||
|
|
|
||
|
|
struct arc4_ctx {
|
||
|
|
uint8_t S[256];
|
||
|
|
uint8_t i;
|
||
|
|
uint8_t j;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Stream operations */
|
||
|
|
ssize_t
|
||
|
|
arc4_encrypt_stream(FILE *out, FILE *in,
|
||
|
|
const uint8_t *key, size_t keylen);
|
||
|
|
ssize_t
|
||
|
|
arc4_decrypt_stream(FILE *out, FILE *in,
|
||
|
|
const uint8_t *key, size_t keylen);
|
||
|
|
|
||
|
|
|
||
|
|
/* Auto-seeding Psuedo Random Number Generator */
|
||
|
|
void arc4_rand_seed(const uint8_t *seed, size_t seedlen);
|
||
|
|
uint8_t arc4_rand8();
|
||
|
|
uint32_t arc4_rand32();
|
||
|
|
|
||
|
|
/* Low-level operations */
|
||
|
|
void arc4_init(struct arc4_ctx *ctx, const uint8_t *key, size_t keylen);
|
||
|
|
uint8_t arc4_out(struct arc4_ctx *ctx);
|
||
|
|
void arc4_crypt(struct arc4_ctx *ctx,
|
||
|
|
uint8_t *obuf, const uint8_t *ibuf, size_t buflen);
|
||
|
|
void arc4_crypt_buffer(const uint8_t *key, size_t keylen,
|
||
|
|
uint8_t *buf, size_t buflen);
|
||
|
|
void arc4_nonce(uint8_t *nonce, size_t noncelen, void *seed, size_t seedlen);
|
||
|
|
|
||
|
|
|
||
|
|
#endif
|