| Damien Miller | 8668706 | 2014-07-02 15:28:02 +1000 | [diff] [blame] | 1 | /* $OpenBSD: hmac.h,v 1.9 2014/06/24 01:13:21 djm Exp $ */ |
| Damien Miller | 4e8d937 | 2014-02-04 11:02:42 +1100 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (c) 2014 Markus Friedl. All rights reserved. |
| 4 | * |
| 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. |
| 8 | * |
| 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. |
| 16 | */ |
| 17 | |
| 18 | #ifndef _HMAC_H |
| 19 | #define _HMAC_H |
| 20 | |
| 21 | /* Returns the algorithm's digest length in bytes or 0 for invalid algorithm */ |
| 22 | size_t ssh_hmac_bytes(int alg); |
| 23 | |
| Damien Miller | 8668706 | 2014-07-02 15:28:02 +1000 | [diff] [blame] | 24 | struct sshbuf; |
| Damien Miller | 4e8d937 | 2014-02-04 11:02:42 +1100 | [diff] [blame] | 25 | struct ssh_hmac_ctx; |
| 26 | struct ssh_hmac_ctx *ssh_hmac_start(int alg); |
| 27 | |
| 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) |
| Damien Miller | 686c7d9 | 2014-05-15 14:37:03 +1000 | [diff] [blame] | 30 | __attribute__((__bounded__(__buffer__, 2, 3))); |
| Damien Miller | 4e8d937 | 2014-02-04 11:02:42 +1100 | [diff] [blame] | 31 | int ssh_hmac_update(struct ssh_hmac_ctx *ctx, const void *m, size_t mlen) |
| Damien Miller | 686c7d9 | 2014-05-15 14:37:03 +1000 | [diff] [blame] | 32 | __attribute__((__bounded__(__buffer__, 2, 3))); |
| Damien Miller | 8668706 | 2014-07-02 15:28:02 +1000 | [diff] [blame] | 33 | int ssh_hmac_update_buffer(struct ssh_hmac_ctx *ctx, const struct sshbuf *b); |
| Damien Miller | 4e8d937 | 2014-02-04 11:02:42 +1100 | [diff] [blame] | 34 | int ssh_hmac_final(struct ssh_hmac_ctx *ctx, u_char *d, size_t dlen) |
| Damien Miller | 686c7d9 | 2014-05-15 14:37:03 +1000 | [diff] [blame] | 35 | __attribute__((__bounded__(__buffer__, 2, 3))); |
| Damien Miller | 4e8d937 | 2014-02-04 11:02:42 +1100 | [diff] [blame] | 36 | void ssh_hmac_free(struct ssh_hmac_ctx *ctx); |
| 37 | |
| 38 | #endif /* _HMAC_H */ |