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1 office 1 /**
2 * @file
3 * Additional SNMPv3 functionality RFC3414 and RFC3826 (internal API, do not use in client code).
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 */
34  
35 #ifndef LWIP_HDR_APPS_SNMP_V3_PRIV_H
36 #define LWIP_HDR_APPS_SNMP_V3_PRIV_H
37  
38 #include "lwip/apps/snmp_opts.h"
39  
40 #if LWIP_SNMP && LWIP_SNMP_V3
41  
42 #include "lwip/apps/snmpv3.h"
43 #include "snmp_pbuf_stream.h"
44  
45 /* According to RFC 3411 */
46 #define SNMP_V3_MAX_ENGINE_ID_LENGTH 32
47 #define SNMP_V3_MAX_USER_LENGTH 32
48  
49 #define SNMP_V3_MAX_AUTH_PARAM_LENGTH 12
50 #define SNMP_V3_MAX_PRIV_PARAM_LENGTH 8
51  
52 #define SNMP_V3_MD5_LEN 16
53 #define SNMP_V3_SHA_LEN 20
54  
55 typedef enum {
56 SNMP_V3_PRIV_MODE_DECRYPT = 0,
57 SNMP_V3_PRIV_MODE_ENCRYPT = 1
58 } snmpv3_priv_mode_t;
59  
60 s32_t snmpv3_get_engine_boots_internal(void);
61 err_t snmpv3_auth(struct snmp_pbuf_stream *stream, u16_t length, const u8_t *key, snmpv3_auth_algo_t algo, u8_t *hmac_out);
62 err_t snmpv3_crypt(struct snmp_pbuf_stream *stream, u16_t length, const u8_t *key,
63 const u8_t *priv_param, const u32_t engine_boots, const u32_t engine_time, snmpv3_priv_algo_t algo, snmpv3_priv_mode_t mode);
64 err_t snmpv3_build_priv_param(u8_t *priv_param);
65 void snmpv3_enginetime_timer(void *arg);
66  
67 #endif
68  
69 #endif /* LWIP_HDR_APPS_SNMP_V3_PRIV_H */