1 /* $OpenBSD: hmac.h,v 1.6 2014/01/27 18:58:14 markus Exp $ */
3 * Copyright (c) 2014 Markus Friedl. All rights reserved.
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 /* Returns the algorithm's digest length in bytes or 0 for invalid algorithm */
22 size_t ssh_hmac_bytes(int alg);
25 struct ssh_hmac_ctx *ssh_hmac_start(int alg);
27 /* Sets the state of the HMAC or resets the state if key == NULL */
28 int ssh_hmac_init(struct ssh_hmac_ctx *ctx, const void *key, size_t klen)
29 __attribute__((__bounded__(__buffer__, 2, 3)));
30 int ssh_hmac_update(struct ssh_hmac_ctx *ctx, const void *m, size_t mlen)
31 __attribute__((__bounded__(__buffer__, 2, 3)));
32 int ssh_hmac_update_buffer(struct ssh_hmac_ctx *ctx, const Buffer *b);
33 int ssh_hmac_final(struct ssh_hmac_ctx *ctx, u_char *d, size_t dlen)
34 __attribute__((__bounded__(__buffer__, 2, 3)));
35 void ssh_hmac_free(struct ssh_hmac_ctx *ctx);