90 lines
3.0 KiB
C
90 lines
3.0 KiB
C
/*******************************************************************************
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OpenAirInterface
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Copyright(c) 1999 - 2014 Eurecom
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OpenAirInterface 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 3 of the License, or
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(at your option) any later version.
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OpenAirInterface 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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You should have received a copy of the GNU General Public License
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along with OpenAirInterface.The full GNU General Public License is
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included in this distribution in the file called "COPYING". If not,
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see <http://www.gnu.org/licenses/>.
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Contact Information
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OpenAirInterface Admin: openair_admin@eurecom.fr
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OpenAirInterface Tech : openair_tech@eurecom.fr
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OpenAirInterface Dev : openair4g-devel@eurecom.fr
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Address : Eurecom, Compus SophiaTech 450, route des chappes, 06451 Biot, France.
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*******************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include "TLVEncoder.h"
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#include "TLVDecoder.h"
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#include "NasSecurityAlgorithms.h"
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int decode_nas_security_algorithms(NasSecurityAlgorithms *nassecurityalgorithms, uint8_t iei, uint8_t *buffer, uint32_t len)
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{
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int decoded = 0;
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if (iei > 0) {
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CHECK_IEI_DECODER(iei, *buffer);
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decoded++;
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}
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nassecurityalgorithms->typeofcipheringalgorithm = (*(buffer + decoded) >> 4) & 0x7;
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nassecurityalgorithms->typeofintegrityalgorithm = *(buffer + decoded) & 0x7;
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decoded++;
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#if defined (NAS_DEBUG)
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dump_nas_security_algorithms_xml(nassecurityalgorithms, iei);
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#endif
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return decoded;
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}
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int encode_nas_security_algorithms(NasSecurityAlgorithms *nassecurityalgorithms, uint8_t iei, uint8_t *buffer, uint32_t len)
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{
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uint32_t encoded = 0;
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/* Checking IEI and pointer */
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CHECK_PDU_POINTER_AND_LENGTH_ENCODER(buffer, NAS_SECURITY_ALGORITHMS_MINIMUM_LENGTH, len);
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#if defined (NAS_DEBUG)
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dump_nas_security_algorithms_xml(nassecurityalgorithms, iei);
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#endif
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if (iei > 0) {
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*buffer = iei;
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encoded++;
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}
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*(buffer + encoded) = 0x00 |
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((nassecurityalgorithms->typeofcipheringalgorithm & 0x7) << 4) |
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(nassecurityalgorithms->typeofintegrityalgorithm & 0x7);
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encoded++;
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return encoded;
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}
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void dump_nas_security_algorithms_xml(NasSecurityAlgorithms *nassecurityalgorithms, uint8_t iei)
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{
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printf("<Nas Security Algorithms>\n");
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if (iei > 0)
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/* Don't display IEI if = 0 */
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printf(" <IEI>0x%X</IEI>\n", iei);
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printf(" <Type of ciphering algorithm>%u</Type of ciphering algorithm>\n", nassecurityalgorithms->typeofcipheringalgorithm);
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printf(" <Type of integrity algorithm>%u</Type of integrity algorithm>\n", nassecurityalgorithms->typeofintegrityalgorithm);
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printf("</Nas Security Algorithms>\n");
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}
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