1263635Sdes/* $OpenBSD: hmac.h,v 1.6 2014/01/27 18:58:14 markus Exp $ */ 2263635Sdes/* 3263635Sdes * Copyright (c) 2014 Markus Friedl. All rights reserved. 4263635Sdes * 5263635Sdes * Permission to use, copy, modify, and distribute this software for any 6263635Sdes * purpose with or without fee is hereby granted, provided that the above 7263635Sdes * copyright notice and this permission notice appear in all copies. 8263635Sdes * 9263635Sdes * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10263635Sdes * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11263635Sdes * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12263635Sdes * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13263635Sdes * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14263635Sdes * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15263635Sdes * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16263635Sdes */ 17263635Sdes 18263635Sdes#ifndef _HMAC_H 19263635Sdes#define _HMAC_H 20263635Sdes 21263635Sdes/* Returns the algorithm's digest length in bytes or 0 for invalid algorithm */ 22263635Sdessize_t ssh_hmac_bytes(int alg); 23263635Sdes 24263635Sdesstruct ssh_hmac_ctx; 25263635Sdesstruct ssh_hmac_ctx *ssh_hmac_start(int alg); 26263635Sdes 27263635Sdes/* Sets the state of the HMAC or resets the state if key == NULL */ 28263635Sdesint ssh_hmac_init(struct ssh_hmac_ctx *ctx, const void *key, size_t klen) 29263635Sdes __attribute__((__bounded__(__buffer__, 2, 3))); 30263635Sdesint ssh_hmac_update(struct ssh_hmac_ctx *ctx, const void *m, size_t mlen) 31263635Sdes __attribute__((__bounded__(__buffer__, 2, 3))); 32263635Sdesint ssh_hmac_update_buffer(struct ssh_hmac_ctx *ctx, const Buffer *b); 33263635Sdesint ssh_hmac_final(struct ssh_hmac_ctx *ctx, u_char *d, size_t dlen) 34263635Sdes __attribute__((__bounded__(__buffer__, 2, 3))); 35263635Sdesvoid ssh_hmac_free(struct ssh_hmac_ctx *ctx); 36263635Sdes 37263635Sdes#endif /* _HMAC_H */ 38