netwerk/srtp/src/crypto/hash/null_auth.c@6474c204b198 (annotated)
netwerk/srtp/src/crypto/hash/null_auth.c
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* |
| michael@0 | 2 | * null_auth.c |
| michael@0 | 3 | * |
| michael@0 | 4 | * implements the do-nothing auth algorithm |
| michael@0 | 5 | * |
| michael@0 | 6 | * David A. McGrew |
| michael@0 | 7 | * Cisco Systems, Inc. |
| michael@0 | 8 | * |
| michael@0 | 9 | */ |
| michael@0 | 10 | |
| michael@0 | 11 | /* |
| michael@0 | 12 | * |
| michael@0 | 13 | * Copyright (c) 2001-2006, Cisco Systems, Inc. |
| michael@0 | 14 | * All rights reserved. |
| michael@0 | 15 | * |
| michael@0 | 16 | * Redistribution and use in source and binary forms, with or without |
| michael@0 | 17 | * modification, are permitted provided that the following conditions |
| michael@0 | 18 | * are met: |
| michael@0 | 19 | * |
| michael@0 | 20 | * Redistributions of source code must retain the above copyright |
| michael@0 | 21 | * notice, this list of conditions and the following disclaimer. |
| michael@0 | 22 | * |
| michael@0 | 23 | * Redistributions in binary form must reproduce the above |
| michael@0 | 24 | * copyright notice, this list of conditions and the following |
| michael@0 | 25 | * disclaimer in the documentation and/or other materials provided |
| michael@0 | 26 | * with the distribution. |
| michael@0 | 27 | * |
| michael@0 | 28 | * Neither the name of the Cisco Systems, Inc. nor the names of its |
| michael@0 | 29 | * contributors may be used to endorse or promote products derived |
| michael@0 | 30 | * from this software without specific prior written permission. |
| michael@0 | 31 | * |
| michael@0 | 32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| michael@0 | 33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| michael@0 | 34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| michael@0 | 35 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| michael@0 | 36 | * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
| michael@0 | 37 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| michael@0 | 38 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| michael@0 | 39 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| michael@0 | 40 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| michael@0 | 41 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| michael@0 | 42 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| michael@0 | 43 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| michael@0 | 44 | * |
| michael@0 | 45 | */ |
| michael@0 | 46 | |
| michael@0 | 47 | |
| michael@0 | 48 | #include "null_auth.h" |
| michael@0 | 49 | #include "alloc.h" |
| michael@0 | 50 | |
| michael@0 | 51 | /* null_auth uses the auth debug module */ |
| michael@0 | 52 | |
| michael@0 | 53 | extern debug_module_t mod_auth; |
| michael@0 | 54 | |
| michael@0 | 55 | err_status_t |
| michael@0 | 56 | null_auth_alloc(auth_t **a, int key_len, int out_len) { |
| michael@0 | 57 | extern auth_type_t null_auth; |
| michael@0 | 58 | uint8_t *pointer; |
| michael@0 | 59 | |
| michael@0 | 60 | debug_print(mod_auth, "allocating auth func with key length %d", key_len); |
| michael@0 | 61 | debug_print(mod_auth, " tag length %d", out_len); |
| michael@0 | 62 | |
| michael@0 | 63 | /* allocate memory for auth and null_auth_ctx_t structures */ |
| michael@0 | 64 | pointer = (uint8_t*)crypto_alloc(sizeof(null_auth_ctx_t) + sizeof(auth_t)); |
| michael@0 | 65 | if (pointer == NULL) |
| michael@0 | 66 | return err_status_alloc_fail; |
| michael@0 | 67 | |
| michael@0 | 68 | /* set pointers */ |
| michael@0 | 69 | *a = (auth_t *)pointer; |
| michael@0 | 70 | (*a)->type = &null_auth; |
| michael@0 | 71 | (*a)->state = pointer + sizeof (auth_t); |
| michael@0 | 72 | (*a)->out_len = out_len; |
| michael@0 | 73 | (*a)->prefix_len = out_len; |
| michael@0 | 74 | (*a)->key_len = key_len; |
| michael@0 | 75 | |
| michael@0 | 76 | /* increment global count of all null_auth uses */ |
| michael@0 | 77 | null_auth.ref_count++; |
| michael@0 | 78 | |
| michael@0 | 79 | return err_status_ok; |
| michael@0 | 80 | } |
| michael@0 | 81 | |
| michael@0 | 82 | err_status_t |
| michael@0 | 83 | null_auth_dealloc(auth_t *a) { |
| michael@0 | 84 | extern auth_type_t null_auth; |
| michael@0 | 85 | |
| michael@0 | 86 | /* zeroize entire state*/ |
| michael@0 | 87 | octet_string_set_to_zero((uint8_t *)a, |
| michael@0 | 88 | sizeof(null_auth_ctx_t) + sizeof(auth_t)); |
| michael@0 | 89 | |
| michael@0 | 90 | /* free memory */ |
| michael@0 | 91 | crypto_free(a); |
| michael@0 | 92 | |
| michael@0 | 93 | /* decrement global count of all null_auth uses */ |
| michael@0 | 94 | null_auth.ref_count--; |
| michael@0 | 95 | |
| michael@0 | 96 | return err_status_ok; |
| michael@0 | 97 | } |
| michael@0 | 98 | |
| michael@0 | 99 | err_status_t |
| michael@0 | 100 | null_auth_init(null_auth_ctx_t *state, const uint8_t *key, int key_len) { |
| michael@0 | 101 | |
| michael@0 | 102 | /* accept any length of key, and do nothing */ |
| michael@0 | 103 | |
| michael@0 | 104 | return err_status_ok; |
| michael@0 | 105 | } |
| michael@0 | 106 | |
| michael@0 | 107 | err_status_t |
| michael@0 | 108 | null_auth_compute(null_auth_ctx_t *state, uint8_t *message, |
| michael@0 | 109 | int msg_octets, int tag_len, uint8_t *result) { |
| michael@0 | 110 | |
| michael@0 | 111 | return err_status_ok; |
| michael@0 | 112 | } |
| michael@0 | 113 | |
| michael@0 | 114 | err_status_t |
| michael@0 | 115 | null_auth_update(null_auth_ctx_t *state, uint8_t *message, |
| michael@0 | 116 | int msg_octets) { |
| michael@0 | 117 | |
| michael@0 | 118 | return err_status_ok; |
| michael@0 | 119 | } |
| michael@0 | 120 | |
| michael@0 | 121 | err_status_t |
| michael@0 | 122 | null_auth_start(null_auth_ctx_t *state) { |
| michael@0 | 123 | return err_status_ok; |
| michael@0 | 124 | } |
| michael@0 | 125 | |
| michael@0 | 126 | /* |
| michael@0 | 127 | * auth_type_t - defines description, test case, and null_auth |
| michael@0 | 128 | * metaobject |
| michael@0 | 129 | */ |
| michael@0 | 130 | |
| michael@0 | 131 | /* begin test case 0 */ |
| michael@0 | 132 | |
| michael@0 | 133 | auth_test_case_t |
| michael@0 | 134 | null_auth_test_case_0 = { |
| michael@0 | 135 | 0, /* octets in key */ |
| michael@0 | 136 | NULL, /* key */ |
| michael@0 | 137 | 0, /* octets in data */ |
| michael@0 | 138 | NULL, /* data */ |
| michael@0 | 139 | 0, /* octets in tag */ |
| michael@0 | 140 | NULL, /* tag */ |
| michael@0 | 141 | NULL /* pointer to next testcase */ |
| michael@0 | 142 | }; |
| michael@0 | 143 | |
| michael@0 | 144 | /* end test case 0 */ |
| michael@0 | 145 | |
| michael@0 | 146 | char null_auth_description[] = "null authentication function"; |
| michael@0 | 147 | |
| michael@0 | 148 | auth_type_t |
| michael@0 | 149 | null_auth = { |
| michael@0 | 150 | (auth_alloc_func) null_auth_alloc, |
| michael@0 | 151 | (auth_dealloc_func) null_auth_dealloc, |
| michael@0 | 152 | (auth_init_func) null_auth_init, |
| michael@0 | 153 | (auth_compute_func) null_auth_compute, |
| michael@0 | 154 | (auth_update_func) null_auth_update, |
| michael@0 | 155 | (auth_start_func) null_auth_start, |
| michael@0 | 156 | (char *) null_auth_description, |
| michael@0 | 157 | (int) 0, /* instance count */ |
| michael@0 | 158 | (auth_test_case_t *) &null_auth_test_case_0, |
| michael@0 | 159 | (debug_module_t *) NULL, |
| michael@0 | 160 | (auth_type_id_t) NULL_AUTH |
| michael@0 | 161 | }; |
| michael@0 | 162 |
