1/* $OpenBSD: chacha.h,v 1.4 2016/08/27 04:04:56 guenther Exp $ */
2
3/*
4chacha-merged.c version 20080118
5D. J. Bernstein
6Public domain.
7*/
8
9#ifndef CHACHA_H
10#define CHACHA_H
11
12#include <sys/types.h>
13#include <crypto/chacha20/_chacha.h>
14
15#define CHACHA_MINKEYLEN 	16
16#define CHACHA_NONCELEN		8
17#define CHACHA_CTRLEN		8
18#define CHACHA_STATELEN		(CHACHA_NONCELEN+CHACHA_CTRLEN)
19#define CHACHA_BLOCKLEN		64
20
21#ifdef CHACHA_EMBED
22#define LOCAL static
23#else
24#define LOCAL
25#endif
26
27#ifdef CHACHA_NONCE0_CTR128
28#define CHACHA_UNUSED __unused
29#else
30#define CHACHA_UNUSED
31#endif
32
33LOCAL void chacha_keysetup(struct chacha_ctx *x, const u_char *k, u_int kbits);
34LOCAL void chacha_ivsetup(struct chacha_ctx *x, const u_char *iv CHACHA_UNUSED,
35    const u_char *ctr);
36LOCAL void chacha_encrypt_bytes(struct chacha_ctx *x, const u_char *m,
37    u_char *c, u_int bytes);
38
39#undef CHACHA_UNUSED
40
41#endif	/* CHACHA_H */
42
43