1/* $OpenBSD: chacha.h,v 1.5 2021/04/03 05:54:14 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#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