1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
/*! \defgroup oap Osmocom Authentication Protocol
* @{
*
* The Osmocom Authentication Protocol (OAP) is a way to use the 3GPP
* AKA (Authentication and Key Agreement) as cryptographic
* authentication mechanism in other protocols that don't provide
* cryptographic authentication.
*
* \file oap.h */
/*
* (C) 2015-2016 by sysmocom - s.f.m.c. GmbH
* Author: Neels Hofmeyr
* All Rights Reserved
*
* SPDX-License-Identifier: GPL-2.0+
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#pragma once
#include <stdint.h>
#include <osmocom/core/msgb.h>
#include <osmocom/gsm/protocol/gsm_04_08_gprs.h>
/*! Information Element Identifiers for OAP IEs.
* They match osmo_gsup_iei (so far). */
enum osmo_oap_iei {
OAP_CAUSE_IE = 0x02,
OAP_RAND_IE = 0x20,
OAP_AUTN_IE = 0x23,
OAP_XRES_IE = 0x24,
OAP_AUTS_IE = 0x25,
OAP_CLIENT_ID_IE = 0x30,
};
/*! OAP message types */
enum osmo_oap_message_type {
OAP_MSGT_REGISTER_REQUEST = 0b00000100,
OAP_MSGT_REGISTER_ERROR = 0b00000101,
OAP_MSGT_REGISTER_RESULT = 0b00000110,
OAP_MSGT_CHALLENGE_REQUEST = 0b00001000,
OAP_MSGT_CHALLENGE_ERROR = 0b00001001,
OAP_MSGT_CHALLENGE_RESULT = 0b00001010,
OAP_MSGT_SYNC_REQUEST = 0b00001100,
OAP_MSGT_SYNC_ERROR = 0b00001101,
OAP_MSGT_SYNC_RESULT = 0b00001110,
};
/*! Parsed/decoded OAP protocol message */
struct osmo_oap_message {
enum osmo_oap_message_type message_type;
enum gsm48_gmm_cause cause;
uint16_t client_id;
int rand_present;
uint8_t rand[16];
int autn_present;
uint8_t autn[16];
int xres_present;
uint8_t xres[8];
int auts_present;
uint8_t auts[14];
};
int osmo_oap_decode(struct osmo_oap_message *oap_msg, const uint8_t *data,
size_t data_len);
void osmo_oap_encode(struct msgb *msg, const struct osmo_oap_message *oap_msg);
/*! @} */
|
