chacha.h revision 262566 
1/* $OpenBSD: chacha.h,v 1.1 2013/11/21 00:45:44 djm 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
14struct chacha_ctx {
15	u_int input[16];
16};
17
18#define CHACHA_MINKEYLEN 	16
19#define CHACHA_NONCELEN		8
20#define CHACHA_CTRLEN		8
21#define CHACHA_STATELEN		(CHACHA_NONCELEN+CHACHA_CTRLEN)
22#define CHACHA_BLOCKLEN		64
23
24void chacha_keysetup(struct chacha_ctx *x, const u_char *k, u_int kbits)
25    __attribute__((__bounded__(__minbytes__, 2, CHACHA_MINKEYLEN)));
26void chacha_ivsetup(struct chacha_ctx *x, const u_char *iv, const u_char *ctr)
27    __attribute__((__bounded__(__minbytes__, 2, CHACHA_NONCELEN)))
28    __attribute__((__bounded__(__minbytes__, 3, CHACHA_CTRLEN)));
29void chacha_encrypt_bytes(struct chacha_ctx *x, const u_char *m,
30    u_char *c, u_int bytes)
31    __attribute__((__bounded__(__buffer__, 2, 4)))
32    __attribute__((__bounded__(__buffer__, 3, 4)));
33
34#endif	/* CHACHA_H */
35
36