/usr/include/srtp/auth.h is in libsrtp0-dev 1.4.4+20100615~dfsg-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 | /*
* auth.h
*
* common interface to authentication functions
*
* David A. McGrew
* Cisco Systems, Inc.
*/
/*
*
* Copyright (c) 2001-2006, Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* Neither the name of the Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef AUTH_H
#define AUTH_H
#include "datatypes.h"
#include "err.h" /* error codes */
#include "crypto.h" /* for auth_type_id_t */
#include "crypto_types.h" /* for values of auth_type_id_t */
typedef struct auth_type_t *auth_type_pointer;
typedef struct auth_t *auth_pointer_t;
typedef err_status_t (*auth_alloc_func)
(auth_pointer_t *ap, int key_len, int out_len);
typedef err_status_t (*auth_init_func)
(void *state, const uint8_t *key, int key_len);
typedef err_status_t (*auth_dealloc_func)(auth_pointer_t ap);
typedef err_status_t (*auth_compute_func)
(void *state, uint8_t *buffer, int octets_to_auth,
int tag_len, uint8_t *tag);
typedef err_status_t (*auth_update_func)
(void *state, uint8_t *buffer, int octets_to_auth);
typedef err_status_t (*auth_start_func)(void *state);
/* some syntactic sugar on these function types */
#define auth_type_alloc(at, a, klen, outlen) \
((at)->alloc((a), (klen), (outlen)))
#define auth_init(a, key) \
(((a)->type)->init((a)->state, (key), ((a)->key_len)))
#define auth_compute(a, buf, len, res) \
(((a)->type)->compute((a)->state, (buf), (len), (a)->out_len, (res)))
#define auth_update(a, buf, len) \
(((a)->type)->update((a)->state, (buf), (len)))
#define auth_start(a)(((a)->type)->start((a)->state))
#define auth_dealloc(c) (((c)->type)->dealloc(c))
/* functions to get information about a particular auth_t */
int
auth_get_key_length(const struct auth_t *a);
int
auth_get_tag_length(const struct auth_t *a);
int
auth_get_prefix_length(const struct auth_t *a);
/*
* auth_test_case_t is a (list of) key/message/tag values that are
* known to be correct for a particular cipher. this data can be used
* to test an implementation in an on-the-fly self test of the
* correcness of the implementation. (see the auth_type_self_test()
* function below)
*/
typedef struct auth_test_case_t {
int key_length_octets; /* octets in key */
uint8_t *key; /* key */
int data_length_octets; /* octets in data */
uint8_t *data; /* data */
int tag_length_octets; /* octets in tag */
uint8_t *tag; /* tag */
struct auth_test_case_t *next_test_case; /* pointer to next testcase */
} auth_test_case_t;
/* auth_type_t */
typedef struct auth_type_t {
auth_alloc_func alloc;
auth_dealloc_func dealloc;
auth_init_func init;
auth_compute_func compute;
auth_update_func update;
auth_start_func start;
char *description;
int ref_count;
auth_test_case_t *test_data;
debug_module_t *debug;
auth_type_id_t id;
} auth_type_t;
typedef struct auth_t {
auth_type_t *type;
void *state;
int out_len; /* length of output tag in octets */
int key_len; /* length of key in octets */
int prefix_len; /* length of keystream prefix */
} auth_t;
/*
* auth_type_self_test() tests an auth_type against test cases
* provided in an array of values of key/message/tag that is known to
* be good
*/
err_status_t
auth_type_self_test(const auth_type_t *at);
/*
* auth_type_test() tests an auth_type against external test cases
* provided in an array of values of key/message/tag that is known to
* be good
*/
err_status_t
auth_type_test(const auth_type_t *at, const auth_test_case_t *test_data);
/*
* auth_type_get_ref_count(at) returns the reference count (the number
* of instantiations) of the auth_type_t at
*/
int
auth_type_get_ref_count(const auth_type_t *at);
#endif /* AUTH_H */
|