| Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* |
| 2 | * hmac.h |
| 3 | * |
| 4 | * interface to hmac auth_type_t |
| 5 | * |
| 6 | * David A. McGrew |
| 7 | * Cisco Systems, Inc. |
| 8 | * |
| 9 | */ |
| 10 | /* |
| 11 | * |
| 12 | * Copyright (c) 2001-2006, Cisco Systems, Inc. |
| 13 | * All rights reserved. |
| 14 | * |
| 15 | * Redistribution and use in source and binary forms, with or without |
| 16 | * modification, are permitted provided that the following conditions |
| 17 | * are met: |
| 18 | * |
| 19 | * Redistributions of source code must retain the above copyright |
| 20 | * notice, this list of conditions and the following disclaimer. |
| 21 | * |
| 22 | * Redistributions in binary form must reproduce the above |
| 23 | * copyright notice, this list of conditions and the following |
| 24 | * disclaimer in the documentation and/or other materials provided |
| 25 | * with the distribution. |
| 26 | * |
| 27 | * Neither the name of the Cisco Systems, Inc. nor the names of its |
| 28 | * contributors may be used to endorse or promote products derived |
| 29 | * from this software without specific prior written permission. |
| 30 | * |
| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 34 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 35 | * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
| 36 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 37 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 38 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 41 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 42 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 43 | * |
| 44 | */ |
| 45 | |
| 46 | #ifndef HMAC_H |
| 47 | #define HMAC_H |
| 48 | |
| 49 | #include "auth.h" |
| 50 | #include "sha1.h" |
| 51 | |
| 52 | typedef struct { |
| 53 | uint8_t opad[64]; |
| 54 | sha1_ctx_t ctx; |
| 55 | sha1_ctx_t init_ctx; |
| 56 | } hmac_ctx_t; |
| 57 | |
| 58 | err_status_t |
| 59 | hmac_alloc(auth_t **a, int key_len, int out_len); |
| 60 | |
| 61 | err_status_t |
| 62 | hmac_dealloc(auth_t *a); |
| 63 | |
| 64 | err_status_t |
| 65 | hmac_init(hmac_ctx_t *state, const uint8_t *key, int key_len); |
| 66 | |
| 67 | err_status_t |
| 68 | hmac_start(hmac_ctx_t *state); |
| 69 | |
| 70 | err_status_t |
| 71 | hmac_update(hmac_ctx_t *state, const uint8_t *message, int msg_octets); |
| 72 | |
| 73 | err_status_t |
| 74 | hmac_compute(hmac_ctx_t *state, const void *message, |
| 75 | int msg_octets, int tag_len, uint8_t *result); |
| 76 | |
| 77 | |
| 78 | #endif /* HMAC_H */ |