1/** 2 * @file 3 * Dummy SNMPv3 functions. 4 */ 5 6/* 7 * Copyright (c) 2016 Elias Oenal. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without modification, 11 * are permitted provided that the following conditions are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright notice, 14 * this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright notice, 16 * this list of conditions and the following disclaimer in the documentation 17 * and/or other materials provided with the distribution. 18 * 3. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 24 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 26 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 29 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 30 * OF SUCH DAMAGE. 31 * 32 * Author: Elias Oenal <lwip@eliasoenal.com> 33 * Dirk Ziegelmeier <dirk@ziegelmeier.net> 34 */ 35 36#include "lwip/apps/snmpv3.h" 37#include "snmpv3_priv.h" 38#include <string.h> 39#include "lwip/err.h" 40 41#if LWIP_SNMP && LWIP_SNMP_V3 42 43/** 44 * @param username is a pointer to a string. 45 * @param auth_algo is a pointer to u8_t. The implementation has to set this if user was found. 46 * @param auth_key is a pointer to a pointer to a string. Implementation has to set this if user was found. 47 * @param priv_algo is a pointer to u8_t. The implementation has to set this if user was found. 48 * @param priv_key is a pointer to a pointer to a string. Implementation has to set this if user was found. 49 */ 50err_t 51snmpv3_get_user(const char* username, u8_t *auth_algo, u8_t *auth_key, u8_t *priv_algo, u8_t *priv_key) 52{ 53 const char* engine_id; 54 u8_t engine_id_len; 55 56 if(strlen(username) == 0) { 57 return ERR_OK; 58 } 59 60 if(memcmp(username, "lwip", 4) != 0) { 61 return ERR_VAL; 62 } 63 64 snmpv3_get_engine_id(&engine_id, &engine_id_len); 65 66 if(auth_key != NULL) { 67 snmpv3_password_to_key_sha((const u8_t*)"maplesyrup", 10, 68 (const u8_t*)engine_id, engine_id_len, 69 auth_key); 70 *auth_algo = SNMP_V3_AUTH_ALGO_SHA; 71 } 72 if(priv_key != NULL) { 73 snmpv3_password_to_key_sha((const u8_t*)"maplesyrup", 10, 74 (const u8_t*)engine_id, engine_id_len, 75 priv_key); 76 *priv_algo = SNMP_V3_PRIV_ALGO_DES; 77 } 78 return ERR_OK; 79} 80 81/** 82 * Get engine ID from persistence 83 * @param id 84 * @param len 85 */ 86void 87snmpv3_get_engine_id(const char **id, u8_t *len) 88{ 89 *id = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02"; 90 *len = 12; 91} 92 93/** 94 * Store engine ID in persistence 95 * @param id 96 * @param len 97 */ 98err_t 99snmpv3_set_engine_id(const char *id, u8_t len) 100{ 101 LWIP_UNUSED_ARG(id); 102 LWIP_UNUSED_ARG(len); 103 return ERR_OK; 104} 105 106/** 107 * Get engine boots from persistence. Must be increased on each boot. 108 * @return 109 */ 110u32_t 111snmpv3_get_engine_boots(void) 112{ 113 return 0; 114} 115 116/** 117 * Store engine boots in persistence 118 * @param boots 119 */ 120void 121snmpv3_set_engine_boots(u32_t boots) 122{ 123 LWIP_UNUSED_ARG(boots); 124} 125 126/** 127 * RFC3414 2.2.2. 128 * Once the timer reaches 2147483647 it gets reset to zero and the 129 * engine boot ups get incremented. 130 */ 131u32_t 132snmpv3_get_engine_time(void) 133{ 134 return 0; 135} 136 137/** 138 * Reset current engine time to 0 139 */ 140void 141snmpv3_reset_engine_time(void) 142{ 143} 144 145#endif /* LWIP_SNMP && LWIP_SNMP_V3 */ 146