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Revision 1.9, Tue Jun 24 01:13:21 2014 UTC (9 years, 10 months ago) by djm
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1, OPENBSD_7_0_BASE, OPENBSD_7_0, OPENBSD_6_9_BASE, OPENBSD_6_9, OPENBSD_6_8_BASE, OPENBSD_6_8, OPENBSD_6_7_BASE, OPENBSD_6_7, OPENBSD_6_6_BASE, OPENBSD_6_6, OPENBSD_6_5_BASE, OPENBSD_6_5, OPENBSD_6_4_BASE, OPENBSD_6_4, OPENBSD_6_3_BASE, OPENBSD_6_3, OPENBSD_6_2_BASE, OPENBSD_6_2, OPENBSD_6_1_BASE, OPENBSD_6_1, OPENBSD_6_0_BASE, OPENBSD_6_0, OPENBSD_5_9_BASE, OPENBSD_5_9, OPENBSD_5_8_BASE, OPENBSD_5_8, OPENBSD_5_7_BASE, OPENBSD_5_7, OPENBSD_5_6_BASE, OPENBSD_5_6, HEAD
Changes since 1.8: +3 -2 lines 

New key API: refactor key-related functions to be more library-like,
existing API is offered as a set of wrappers.

with and ok markus@

Thanks also to Ben Hawkes, David Tomaschik, Ivan Fratric, Matthew
Dempsky and Ron Bowes for a detailed review a few months ago.

/* $OpenBSD: hmac.h,v 1.9 2014/06/24 01:13:21 djm Exp $ */
/*
 * Copyright (c) 2014 Markus Friedl.  All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef _HMAC_H
#define _HMAC_H

/* Returns the algorithm's digest length in bytes or 0 for invalid algorithm */
size_t ssh_hmac_bytes(int alg);

struct sshbuf;
struct ssh_hmac_ctx;
struct ssh_hmac_ctx *ssh_hmac_start(int alg);

/* Sets the state of the HMAC or resets the state if key == NULL */
int ssh_hmac_init(struct ssh_hmac_ctx *ctx, const void *key, size_t klen)
	__attribute__((__bounded__(__buffer__, 2, 3)));
int ssh_hmac_update(struct ssh_hmac_ctx *ctx, const void *m, size_t mlen)
	__attribute__((__bounded__(__buffer__, 2, 3)));
int ssh_hmac_update_buffer(struct ssh_hmac_ctx *ctx, const struct sshbuf *b);
int ssh_hmac_final(struct ssh_hmac_ctx *ctx, u_char *d, size_t dlen)
	__attribute__((__bounded__(__buffer__, 2, 3)));
void ssh_hmac_free(struct ssh_hmac_ctx *ctx);

#endif /* _HMAC_H */