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| 1 /* | |
| 2 * auth.h | |
| 3 * | |
| 4 * common interface to authentication functions | |
| 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 AUTH_H | |
| 47 #define AUTH_H | |
| 48 | |
| 49 #include "datatypes.h" | |
| 50 #include "err.h" /* error codes */ | |
| 51 #include "crypto.h" /* for auth_type_id_t */ | |
| 52 #include "crypto_types.h" /* for values of auth_type_id_t */ | |
| 53 | |
| 54 typedef struct auth_type_t *auth_type_pointer; | |
| 55 typedef struct auth_t *auth_pointer_t; | |
| 56 | |
| 57 typedef err_status_t (*auth_alloc_func) | |
| 58 (auth_pointer_t *ap, int key_len, int out_len); | |
| 59 | |
| 60 typedef err_status_t (*auth_init_func) | |
| 61 (void *state, const uint8_t *key, int key_len); | |
| 62 | |
| 63 typedef err_status_t (*auth_dealloc_func)(auth_pointer_t ap); | |
| 64 | |
| 65 typedef err_status_t (*auth_compute_func) | |
| 66 (void *state, uint8_t *buffer, int octets_to_auth, | |
| 67 int tag_len, uint8_t *tag); | |
| 68 | |
| 69 typedef err_status_t (*auth_update_func) | |
| 70 (void *state, uint8_t *buffer, int octets_to_auth); | |
| 71 | |
| 72 typedef err_status_t (*auth_start_func)(void *state); | |
| 73 | |
| 74 /* some syntactic sugar on these function types */ | |
| 75 | |
| 76 #define auth_type_alloc(at, a, klen, outlen) \ | |
| 77 ((at)->alloc((a), (klen), (outlen))) | |
| 78 | |
| 79 #define auth_init(a, key) \ | |
| 80 (((a)->type)->init((a)->state, (key), ((a)->key_len))) | |
| 81 | |
| 82 #define auth_compute(a, buf, len, res) \ | |
| 83 (((a)->type)->compute((a)->state, (buf), (len), (a)->out_len, (res))) | |
| 84 | |
| 85 #define auth_update(a, buf, len) \ | |
| 86 (((a)->type)->update((a)->state, (buf), (len))) | |
| 87 | |
| 88 #define auth_start(a)(((a)->type)->start((a)->state)) | |
| 89 | |
| 90 #define auth_dealloc(c) (((c)->type)->dealloc(c)) | |
| 91 | |
| 92 /* functions to get information about a particular auth_t */ | |
| 93 | |
| 94 int | |
| 95 auth_get_key_length(const struct auth_t *a); | |
| 96 | |
| 97 int | |
| 98 auth_get_tag_length(const struct auth_t *a); | |
| 99 | |
| 100 int | |
| 101 auth_get_prefix_length(const struct auth_t *a); | |
| 102 | |
| 103 /* | |
| 104 * auth_test_case_t is a (list of) key/message/tag values that are | |
| 105 * known to be correct for a particular cipher. this data can be used | |
| 106 * to test an implementation in an on-the-fly self test of the | |
| 107 * correcness of the implementation. (see the auth_type_self_test() | |
| 108 * function below) | |
| 109 */ | |
| 110 | |
| 111 typedef struct auth_test_case_t { | |
| 112 int key_length_octets; /* octets in key */ | |
| 113 uint8_t *key; /* key */ | |
| 114 int data_length_octets; /* octets in data */ | |
| 115 uint8_t *data; /* data */ | |
| 116 int tag_length_octets; /* octets in tag */ | |
| 117 uint8_t *tag; /* tag */ | |
| 118 struct auth_test_case_t *next_test_case; /* pointer to next testcase */ | |
| 119 } auth_test_case_t; | |
| 120 | |
| 121 /* auth_type_t */ | |
| 122 | |
| 123 typedef struct auth_type_t { | |
| 124 auth_alloc_func alloc; | |
| 125 auth_dealloc_func dealloc; | |
| 126 auth_init_func init; | |
| 127 auth_compute_func compute; | |
| 128 auth_update_func update; | |
| 129 auth_start_func start; | |
| 130 char *description; | |
| 131 int ref_count; | |
| 132 auth_test_case_t *test_data; | |
| 133 debug_module_t *debug; | |
| 134 auth_type_id_t id; | |
| 135 } auth_type_t; | |
| 136 | |
| 137 typedef struct auth_t { | |
| 138 auth_type_t *type; | |
| 139 void *state; | |
| 140 int out_len; /* length of output tag in octets */ | |
| 141 int key_len; /* length of key in octets */ | |
| 142 int prefix_len; /* length of keystream prefix */ | |
| 143 } auth_t; | |
| 144 | |
| 145 /* | |
| 146 * auth_type_self_test() tests an auth_type against test cases | |
| 147 * provided in an array of values of key/message/tag that is known to | |
| 148 * be good | |
| 149 */ | |
| 150 | |
| 151 err_status_t | |
| 152 auth_type_self_test(const auth_type_t *at); | |
| 153 | |
| 154 /* | |
| 155 * auth_type_test() tests an auth_type against external test cases | |
| 156 * provided in an array of values of key/message/tag that is known to | |
| 157 * be good | |
| 158 */ | |
| 159 | |
| 160 err_status_t | |
| 161 auth_type_test(const auth_type_t *at, const auth_test_case_t *test_data); | |
| 162 | |
| 163 /* | |
| 164 * auth_type_get_ref_count(at) returns the reference count (the number | |
| 165 * of instantiations) of the auth_type_t at | |
| 166 */ | |
| 167 | |
| 168 int | |
| 169 auth_type_get_ref_count(const auth_type_t *at); | |
| 170 | |
| 171 #endif /* AUTH_H */ | |
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Chromium Code Reviews
Issue 2344973002:
Update libsrtp to version 2.0 (Closed)
