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/* $OpenBSD: chacha.h,v 1.5 2021/04/03 05:54:14 djm Exp $ */
/*
chacha-merged.c version 20080118
D. J. Bernstein
Public domain.
*/
#ifndef CHACHA_H
#define CHACHA_H
#include <sys/types.h>
#include <stdlib.h>
struct chacha_ctx {
u_int input[16];
};
#define CHACHA_MINKEYLEN 16
#define CHACHA_NONCELEN 8
#define CHACHA_CTRLEN 8
#define CHACHA_STATELEN (CHACHA_NONCELEN+CHACHA_CTRLEN)
#define CHACHA_BLOCKLEN 64
void chacha_keysetup(struct chacha_ctx *x, const u_char *k, u_int kbits)
__attribute__((__bounded__(__minbytes__, 2, CHACHA_MINKEYLEN)));
void chacha_ivsetup(struct chacha_ctx *x, const u_char *iv, const u_char *ctr)
__attribute__((__bounded__(__minbytes__, 2, CHACHA_NONCELEN)))
__attribute__((__bounded__(__minbytes__, 3, CHACHA_CTRLEN)));
void chacha_encrypt_bytes(struct chacha_ctx *x, const u_char *m,
u_char *c, u_int bytes)
__attribute__((__bounded__(__buffer__, 2, 4)))
__attribute__((__bounded__(__buffer__, 3, 4)));
#endif /* CHACHA_H */
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