1295367Sdes/* $OpenBSD: chacha.h,v 1.3 2014/05/02 03:27:54 djm Exp $ */ 2261287Sdes 3261287Sdes/* 4261287Sdeschacha-merged.c version 20080118 5261287SdesD. J. Bernstein 6261287SdesPublic domain. 7261287Sdes*/ 8261287Sdes 9261287Sdes#ifndef CHACHA_H 10261287Sdes#define CHACHA_H 11261287Sdes 12261287Sdes#include <sys/types.h> 13261287Sdes 14261287Sdesstruct chacha_ctx { 15261287Sdes u_int input[16]; 16261287Sdes}; 17261287Sdes 18261287Sdes#define CHACHA_MINKEYLEN 16 19261287Sdes#define CHACHA_NONCELEN 8 20261287Sdes#define CHACHA_CTRLEN 8 21261287Sdes#define CHACHA_STATELEN (CHACHA_NONCELEN+CHACHA_CTRLEN) 22261287Sdes#define CHACHA_BLOCKLEN 64 23261287Sdes 24261287Sdesvoid chacha_keysetup(struct chacha_ctx *x, const u_char *k, u_int kbits) 25261287Sdes __attribute__((__bounded__(__minbytes__, 2, CHACHA_MINKEYLEN))); 26261287Sdesvoid chacha_ivsetup(struct chacha_ctx *x, const u_char *iv, const u_char *ctr) 27261287Sdes __attribute__((__bounded__(__minbytes__, 2, CHACHA_NONCELEN))) 28261287Sdes __attribute__((__bounded__(__minbytes__, 3, CHACHA_CTRLEN))); 29261287Sdesvoid chacha_encrypt_bytes(struct chacha_ctx *x, const u_char *m, 30261287Sdes u_char *c, u_int bytes) 31261287Sdes __attribute__((__bounded__(__buffer__, 2, 4))) 32261287Sdes __attribute__((__bounded__(__buffer__, 3, 4))); 33261287Sdes 34261287Sdes#endif /* CHACHA_H */ 35261287Sdes 36