83 lines
2.8 KiB
C
83 lines
2.8 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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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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