147 lines
4.8 KiB
C
147 lines
4.8 KiB
C
/*
|
|
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership.
|
|
* The OpenAirInterface Software Alliance licenses this file to You under
|
|
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
|
|
* except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.openairinterface.org/?page_id=698
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*-------------------------------------------------------------------------------
|
|
* For more information about the OpenAirInterface (OAI) Software Alliance:
|
|
* contact@openairinterface.org
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
|
|
#include "TLVEncoder.h"
|
|
#include "TLVDecoder.h"
|
|
#include "UeSecurityCapability.h"
|
|
|
|
int decode_ue_security_capability(UeSecurityCapability *uesecuritycapability, uint8_t iei, uint8_t *buffer, uint32_t len)
|
|
{
|
|
int decoded = 0;
|
|
uint8_t ielen = 0;
|
|
|
|
if (iei > 0) {
|
|
CHECK_IEI_DECODER(iei, *buffer);
|
|
decoded++;
|
|
}
|
|
|
|
memset(uesecuritycapability, 0, sizeof(UeSecurityCapability));
|
|
ielen = *(buffer + decoded);
|
|
decoded++;
|
|
CHECK_LENGTH_DECODER(len - decoded, ielen);
|
|
uesecuritycapability->eea = *(buffer + decoded);
|
|
decoded++;
|
|
uesecuritycapability->eia = *(buffer + decoded);
|
|
decoded++;
|
|
|
|
if (len >= decoded + 3) {
|
|
uesecuritycapability->umts_present = 1;
|
|
uesecuritycapability->uea = *(buffer + decoded);
|
|
decoded++;
|
|
uesecuritycapability->uia = *(buffer + decoded) & 0x7f;
|
|
decoded++;
|
|
|
|
if (len == decoded + 4) {
|
|
uesecuritycapability->gprs_present = 1;
|
|
uesecuritycapability->gea = *(buffer + decoded) & 0x7f;
|
|
decoded++;
|
|
}
|
|
}
|
|
|
|
#if defined (NAS_DEBUG)
|
|
dump_ue_security_capability_xml(uesecuritycapability, iei);
|
|
#endif
|
|
return decoded;
|
|
}
|
|
int encode_ue_security_capability(UeSecurityCapability *uesecuritycapability, uint8_t iei, uint8_t *buffer, uint32_t len)
|
|
{
|
|
uint8_t *lenPtr;
|
|
uint32_t encoded = 0;
|
|
/* Checking IEI and pointer */
|
|
CHECK_PDU_POINTER_AND_LENGTH_ENCODER(buffer, UE_SECURITY_CAPABILITY_MINIMUM_LENGTH, len);
|
|
#if defined (NAS_DEBUG)
|
|
dump_ue_security_capability_xml(uesecuritycapability, iei);
|
|
#endif
|
|
|
|
if (iei > 0) {
|
|
*buffer = iei;
|
|
encoded++;
|
|
}
|
|
|
|
lenPtr = (buffer + encoded);
|
|
encoded ++;
|
|
*(buffer + encoded) = uesecuritycapability->eea;
|
|
encoded++;
|
|
*(buffer + encoded) = uesecuritycapability->eia;
|
|
encoded++;
|
|
|
|
// From ETSI TS 124 301 V10.15.0 (2014-10) 9.9.3.36 Security capability:
|
|
// Octets 5, 6, and 7 are optional. If octet 5 is included, then also octet 6 shall be included and octet 7 may be included.
|
|
// If a UE did not indicate support of any security algorithm for Gb mode, octet 7 shall not be included. If the UE did not
|
|
// indicate support of any security algorithm for Iu mode and Gb mode, octets 5, 6, and 7 shall not be included.
|
|
// If the UE did not indicate support of any security algorithm for Iu mode but indicated support of a security algorithm for
|
|
// Gb mode, octets 5, 6, and 7 shall be included. In this case octets 5 and 6 are filled with the value of zeroes.
|
|
if (uesecuritycapability->umts_present) {
|
|
*(buffer + encoded) = uesecuritycapability->uea;
|
|
encoded++;
|
|
*(buffer + encoded) = 0x00 |
|
|
(uesecuritycapability->uia & 0x7f);
|
|
encoded++;
|
|
|
|
if (uesecuritycapability->gprs_present) {
|
|
*(buffer + encoded) = 0x00 | (uesecuritycapability->gea & 0x7f);
|
|
encoded++;
|
|
}
|
|
} else {
|
|
if (uesecuritycapability->gprs_present) {
|
|
*(buffer + encoded) = 0x00;
|
|
encoded++;
|
|
*(buffer + encoded) = 0x00;
|
|
encoded++;
|
|
*(buffer + encoded) = 0x00 | (uesecuritycapability->gea & 0x7f);
|
|
encoded++;
|
|
}
|
|
}
|
|
|
|
*lenPtr = encoded - 1 - ((iei > 0) ? 1 : 0);
|
|
return encoded;
|
|
}
|
|
|
|
void dump_ue_security_capability_xml(UeSecurityCapability *uesecuritycapability, uint8_t iei)
|
|
{
|
|
printf("<Ue Security Capability>\n");
|
|
|
|
if (iei > 0)
|
|
/* Don't display IEI if = 0 */
|
|
printf(" <IEI>0x%X</IEI>\n", iei);
|
|
|
|
printf(" <EEA>%u</EEA>\n", uesecuritycapability->eea);
|
|
printf(" <EIA>%u</EIA>\n", uesecuritycapability->eia);
|
|
|
|
if (uesecuritycapability->umts_present == 1) {
|
|
printf(" <UEA>%u</UEA>\n", uesecuritycapability->uea);
|
|
printf(" <UIA>%u</UIA>\n", uesecuritycapability->uia);
|
|
}
|
|
|
|
if (uesecuritycapability->gprs_present == 1) {
|
|
printf(" <GEA>%u</GEA>\n", uesecuritycapability->gea);
|
|
}
|
|
|
|
printf("</Ue Security Capability>\n");
|
|
}
|
|
|