mirror of https://gerrit.osmocom.org/libosmocore
73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
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/* Osmocom Authentication Protocol message encoder/decoder */
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/* (C) 2015-2016 by sysmocom s.f.m.c. GmbH
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* All Rights Reserved
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*
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* Author: Neels Hofmeyr
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#pragma once
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#include <stdint.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/gsm/protocol/gsm_04_08_gprs.h>
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/*! \brief Information Element Identifiers for OAP IEs.
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* They match osmo_gsup_iei (so far). */
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enum osmo_oap_iei {
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OAP_CAUSE_IE = 0x02,
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OAP_RAND_IE = 0x20,
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OAP_AUTN_IE = 0x23,
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OAP_XRES_IE = 0x24,
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OAP_AUTS_IE = 0x25,
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OAP_CLIENT_ID_IE = 0x30,
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};
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/*! \brief OAP message types */
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enum osmo_oap_message_type {
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OAP_MSGT_REGISTER_REQUEST = 0b00000100,
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OAP_MSGT_REGISTER_ERROR = 0b00000101,
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OAP_MSGT_REGISTER_RESULT = 0b00000110,
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OAP_MSGT_CHALLENGE_REQUEST = 0b00001000,
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OAP_MSGT_CHALLENGE_ERROR = 0b00001001,
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OAP_MSGT_CHALLENGE_RESULT = 0b00001010,
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OAP_MSGT_SYNC_REQUEST = 0b00001100,
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OAP_MSGT_SYNC_ERROR = 0b00001101,
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OAP_MSGT_SYNC_RESULT = 0b00001110,
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};
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/*! \brief Parsed/decoded OAP protocol message */
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struct osmo_oap_message {
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enum osmo_oap_message_type message_type;
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enum gsm48_gmm_cause cause;
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uint16_t client_id;
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int rand_present;
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uint8_t rand[16];
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int autn_present;
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uint8_t autn[16];
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int xres_present;
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uint8_t xres[8];
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int auts_present;
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uint8_t auts[16];
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};
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int osmo_oap_decode(struct osmo_oap_message *oap_msg, const uint8_t *data,
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size_t data_len);
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void osmo_oap_encode(struct msgb *msg, const struct osmo_oap_message *oap_msg);
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