forked from acouzens/open5gs
50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
/*
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* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
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*
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* This file is part of Open5GS.
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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 Affero General Public License as published by
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* the Free Software Foundation, either version 3 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 <https://www.gnu.org/licenses/>.
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*/
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#include "ogs-crypt.h"
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#include "ogs-core.h"
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#include "hss-auc.h"
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#define FC_VALUE 0x10
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void hss_auc_kasme(const uint8_t *ck, const uint8_t *ik,
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const uint8_t plmn_id[3], const uint8_t *sqn, const uint8_t *ak,
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uint8_t *kasme)
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{
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uint8_t s[14];
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uint8_t k[32];
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int i;
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memcpy(&k[0], ck, 16);
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memcpy(&k[16], ik, 16);
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s[0] = FC_VALUE;
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memcpy(&s[1], plmn_id, 3);
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s[4] = 0x00;
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s[5] = 0x03;
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for (i = 0; i < 6; i++)
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s[6+i] = sqn[i] ^ ak[i];
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s[12] = 0x00;
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s[13] = 0x06;
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ogs_hmac_sha256(k, 32, s, 14, kasme, 32);
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}
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