146 lines
3.8 KiB
C
146 lines
3.8 KiB
C
/**
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* @file
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* Dummy SNMPv3 functions.
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*/
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/*
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* Copyright (c) 2016 Elias Oenal.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* Author: Elias Oenal <lwip@eliasoenal.com>
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* Dirk Ziegelmeier <dirk@ziegelmeier.net>
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*/
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#include "lwip/apps/snmpv3.h"
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#include "snmpv3_priv.h"
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#include <string.h>
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#include "lwip/err.h"
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#if LWIP_SNMP && LWIP_SNMP_V3
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/**
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* @param username is a pointer to a string.
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* @param auth_algo is a pointer to u8_t. The implementation has to set this if user was found.
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* @param auth_key is a pointer to a pointer to a string. Implementation has to set this if user was found.
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* @param priv_algo is a pointer to u8_t. The implementation has to set this if user was found.
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* @param priv_key is a pointer to a pointer to a string. Implementation has to set this if user was found.
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*/
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err_t
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snmpv3_get_user(const char* username, u8_t *auth_algo, u8_t *auth_key, u8_t *priv_algo, u8_t *priv_key)
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{
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const char* engine_id;
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u8_t engine_id_len;
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if(strlen(username) == 0) {
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return ERR_OK;
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}
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if(memcmp(username, "lwip", 4) != 0) {
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return ERR_VAL;
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}
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snmpv3_get_engine_id(&engine_id, &engine_id_len);
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if(auth_key != NULL) {
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snmpv3_password_to_key_sha((const u8_t*)"maplesyrup", 10,
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(const u8_t*)engine_id, engine_id_len,
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auth_key);
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*auth_algo = SNMP_V3_AUTH_ALGO_SHA;
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}
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if(priv_key != NULL) {
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snmpv3_password_to_key_sha((const u8_t*)"maplesyrup", 10,
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(const u8_t*)engine_id, engine_id_len,
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priv_key);
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*priv_algo = SNMP_V3_PRIV_ALGO_DES;
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}
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return ERR_OK;
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}
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/**
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* Get engine ID from persistence
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* @param id
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* @param len
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*/
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void
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snmpv3_get_engine_id(const char **id, u8_t *len)
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{
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*id = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02";
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*len = 12;
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}
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/**
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* Store engine ID in persistence
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* @param id
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* @param len
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*/
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err_t
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snmpv3_set_engine_id(const char *id, u8_t len)
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{
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LWIP_UNUSED_ARG(id);
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LWIP_UNUSED_ARG(len);
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return ERR_OK;
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}
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/**
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* Get engine boots from persistence. Must be increased on each boot.
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* @return
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*/
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u32_t
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snmpv3_get_engine_boots(void)
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{
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return 0;
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}
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/**
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* Store engine boots in persistence
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* @param boots
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*/
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void
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snmpv3_set_engine_boots(u32_t boots)
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{
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LWIP_UNUSED_ARG(boots);
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}
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/**
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* RFC3414 2.2.2.
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* Once the timer reaches 2147483647 it gets reset to zero and the
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* engine boot ups get incremented.
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*/
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u32_t
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snmpv3_get_engine_time(void)
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{
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return 0;
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}
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/**
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* Reset current engine time to 0
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*/
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void
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snmpv3_reset_engine_time(void)
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{
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}
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#endif /* LWIP_SNMP && LWIP_SNMP_V3 */
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