chacha.h revision 323134 
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 <stdlib.h>
14
15struct chacha_ctx {
16	u_int input[16];
17};
18
19#define CHACHA_MINKEYLEN 	16
20#define CHACHA_NONCELEN		8
21#define CHACHA_CTRLEN		8
22#define CHACHA_STATELEN		(CHACHA_NONCELEN+CHACHA_CTRLEN)
23#define CHACHA_BLOCKLEN		64
24
25void chacha_keysetup(struct chacha_ctx *x, const u_char *k, u_int kbits)
26    __attribute__((__bounded__(__minbytes__, 2, CHACHA_MINKEYLEN)));
27void chacha_ivsetup(struct chacha_ctx *x, const u_char *iv, const u_char *ctr)
28    __attribute__((__bounded__(__minbytes__, 2, CHACHA_NONCELEN)))
29    __attribute__((__bounded__(__minbytes__, 3, CHACHA_CTRLEN)));
30void chacha_encrypt_bytes(struct chacha_ctx *x, const u_char *m,
31    u_char *c, u_int bytes)
32    __attribute__((__bounded__(__buffer__, 2, 4)))
33    __attribute__((__bounded__(__buffer__, 3, 4)));
34
35#endif	/* CHACHA_H */
36
37