1 /* $OpenBSD: hmac.h,v 1.9 2014/06/24 01:13:21 djm 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
);
26 struct ssh_hmac_ctx
*ssh_hmac_start(int alg
);
28 /* Sets the state of the HMAC or resets the state if key == NULL */
29 int ssh_hmac_init(struct ssh_hmac_ctx
*ctx
, const void *key
, size_t klen
)
30 __attribute__((__bounded__(__buffer__
, 2, 3)));
31 int ssh_hmac_update(struct ssh_hmac_ctx
*ctx
, const void *m
, size_t mlen
)
32 __attribute__((__bounded__(__buffer__
, 2, 3)));
33 int ssh_hmac_update_buffer(struct ssh_hmac_ctx
*ctx
, const struct sshbuf
*b
);
34 int ssh_hmac_final(struct ssh_hmac_ctx
*ctx
, u_char
*d
, size_t dlen
)
35 __attribute__((__bounded__(__buffer__
, 2, 3)));
36 void ssh_hmac_free(struct ssh_hmac_ctx
*ctx
);