1/* $NetBSD: chacha.h,v 1.2 2018/04/06 18:58:59 christos Exp $ */
2/* $OpenBSD: chacha.h,v 1.4 2016/08/27 04:04:56 guenther Exp $ */
3
4/*
5chacha-merged.c version 20080118
6D. J. Bernstein
7Public domain.
8*/
9
10#ifndef CHACHA_H
11#define CHACHA_H
12
13#include <sys/types.h>
14#include <stdlib.h>
15
16struct chacha_ctx {
17 u_int input[16];
18};
19
20#define CHACHA_MINKEYLEN 16
21#define CHACHA_NONCELEN 8
22#define CHACHA_CTRLEN 8
23#define CHACHA_STATELEN (CHACHA_NONCELEN+CHACHA_CTRLEN)
24#define CHACHA_BLOCKLEN 64
25
26void chacha_keysetup(struct chacha_ctx *x, const u_char *k, u_int kbits)
27 __attribute__((__bounded__(__minbytes__, 2, CHACHA_MINKEYLEN)));
28void chacha_ivsetup(struct chacha_ctx *x, const u_char *iv, const u_char *ctr)
29 __attribute__((__bounded__(__minbytes__, 2, CHACHA_NONCELEN)))
30 __attribute__((__bounded__(__minbytes__, 3, CHACHA_CTRLEN)));
31void chacha_encrypt_bytes(struct chacha_ctx *x, const u_char *m,
32 u_char *c, u_int bytes)
33 __attribute__((__bounded__(__buffer__, 2, 4)))
34 __attribute__((__bounded__(__buffer__, 3, 4)));
35
36#endif /* CHACHA_H */
37
38