1386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari/* 2386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * null_auth.c 3386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * 4386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * implements the do-nothing auth algorithm 5386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * 6386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * David A. McGrew 7386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * Cisco Systems, Inc. 8386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * 9386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari */ 10386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 11386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari/* 12386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * 13386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * Copyright (c) 2001-2006, Cisco Systems, Inc. 14386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * All rights reserved. 15386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * 16386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * Redistribution and use in source and binary forms, with or without 17386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * modification, are permitted provided that the following conditions 18386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * are met: 19386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * 20386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * Redistributions of source code must retain the above copyright 21386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * notice, this list of conditions and the following disclaimer. 22386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * 23386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * Redistributions in binary form must reproduce the above 24386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * copyright notice, this list of conditions and the following 25386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * disclaimer in the documentation and/or other materials provided 26386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * with the distribution. 27386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * 28386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * Neither the name of the Cisco Systems, Inc. nor the names of its 29386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * contributors may be used to endorse or promote products derived 30386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * from this software without specific prior written permission. 31386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * 32386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 33386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 34386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 35386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 36386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 37386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 38386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 39386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 40386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 41386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 42386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 43386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * OF THE POSSIBILITY OF SUCH DAMAGE. 44386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * 45386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari */ 46386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 47386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 48386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari#include "null_auth.h" 49386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari#include "alloc.h" 50386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 51386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari/* null_auth uses the auth debug module */ 52386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 53386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagariextern debug_module_t mod_auth; 54386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 55386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagarierr_status_t 56386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagarinull_auth_alloc(auth_t **a, int key_len, int out_len) { 57386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari extern auth_type_t null_auth; 58386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari uint8_t *pointer; 59386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 60386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari debug_print(mod_auth, "allocating auth func with key length %d", key_len); 61386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari debug_print(mod_auth, " tag length %d", out_len); 62386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 63386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari /* allocate memory for auth and null_auth_ctx_t structures */ 64386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari pointer = (uint8_t*)crypto_alloc(sizeof(null_auth_ctx_t) + sizeof(auth_t)); 65386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari if (pointer == NULL) 66386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari return err_status_alloc_fail; 67386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 68386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari /* set pointers */ 69386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari *a = (auth_t *)pointer; 70386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari (*a)->type = &null_auth; 71386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari (*a)->state = pointer + sizeof (auth_t); 72386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari (*a)->out_len = out_len; 73386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari (*a)->prefix_len = out_len; 74386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari (*a)->key_len = key_len; 75386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 76386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari /* increment global count of all null_auth uses */ 77386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari null_auth.ref_count++; 78386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 79386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari return err_status_ok; 80386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari} 81386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 82386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagarierr_status_t 83386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagarinull_auth_dealloc(auth_t *a) { 84386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari extern auth_type_t null_auth; 85386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 86386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari /* zeroize entire state*/ 87386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari octet_string_set_to_zero((uint8_t *)a, 88386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari sizeof(null_auth_ctx_t) + sizeof(auth_t)); 89386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 90386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari /* free memory */ 91386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari crypto_free(a); 92386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 93386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari /* decrement global count of all null_auth uses */ 94386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari null_auth.ref_count--; 95386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 96386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari return err_status_ok; 97386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari} 98386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 99386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagarierr_status_t 100386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagarinull_auth_init(null_auth_ctx_t *state, const uint8_t *key, int key_len) { 101386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 102386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari /* accept any length of key, and do nothing */ 103386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 104386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari return err_status_ok; 105386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari} 106386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 107386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagarierr_status_t 108386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagarinull_auth_compute(null_auth_ctx_t *state, uint8_t *message, 109386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari int msg_octets, int tag_len, uint8_t *result) { 110386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 111386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari return err_status_ok; 112386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari} 113386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 114386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagarierr_status_t 115386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagarinull_auth_update(null_auth_ctx_t *state, uint8_t *message, 116386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari int msg_octets) { 117386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 118386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari return err_status_ok; 119386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari} 120386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 121386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagarierr_status_t 122386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagarinull_auth_start(null_auth_ctx_t *state) { 123386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari return err_status_ok; 124386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari} 125386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 126386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari/* 127386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * auth_type_t - defines description, test case, and null_auth 128386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari * metaobject 129386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari */ 130386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 131386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari/* begin test case 0 */ 132386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 133386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagariauth_test_case_t 134386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagarinull_auth_test_case_0 = { 135386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 0, /* octets in key */ 136386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari NULL, /* key */ 137386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 0, /* octets in data */ 138386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari NULL, /* data */ 139386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 0, /* octets in tag */ 140386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari NULL, /* tag */ 141386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari NULL /* pointer to next testcase */ 142386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari}; 143386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 144386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari/* end test case 0 */ 145386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 146386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagarichar null_auth_description[] = "null authentication function"; 147386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari 148386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagariauth_type_t 149386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagarinull_auth = { 150386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari (auth_alloc_func) null_auth_alloc, 151386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari (auth_dealloc_func) null_auth_dealloc, 152386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari (auth_init_func) null_auth_init, 153386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari (auth_compute_func) null_auth_compute, 154386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari (auth_update_func) null_auth_update, 155386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari (auth_start_func) null_auth_start, 156386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari (char *) null_auth_description, 157386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari (int) 0, /* instance count */ 158386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari (auth_test_case_t *) &null_auth_test_case_0 159386ce4d9144fc190797f4e43a31aeaf76ca2e373Param Reddappagari}; 160