maki/openairinterface5g
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Simplify rrc_gNB_process_security()

Browse Source 
rrc_gNB_process_security() does not only set (process) the security
algorithms, but also checks for those. However, we don't use the check.
Simplify the function, to reintroduce the check later. Rename to
set_UE_security_algos() to better reflect what the functions do.
This commit is contained in:
Robert Schmidt
2024-10-16 19:13:48 +02:00
parent 0cea0395e8
commit 8c14bf4921
1 changed files with 17 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair2/RRC/NR/rrc_gNB_NGAP.c
+17 -32
View File
@@ -93,7 +93,7 @@ static const uint16_t NGAP_INTEGRITY_NIA3_MASK = 0x2000;
#define INTEGRITY_ALGORITHM_NONE NR_IntegrityProtAlgorithm_nia0
static bool rrc_gNB_process_security(const gNB_RRC_INST *rrc, gNB_RRC_UE_t *UE, ngap_security_capabilities_t *security_capabilities_pP);
static void set_UE_security_algos(const gNB_RRC_INST *rrc, gNB_RRC_UE_t *UE, const ngap_security_capabilities_t *cap);
/*!
*\brief save security key.
@@ -458,7 +458,7 @@ int rrc_gNB_process_NGAP_INITIAL_CONTEXT_SETUP_REQ(MessageDef *msg_p, instance_t
UE->nas_pdu = req->nas_pdu;
/* security */
rrc_gNB_process_security(rrc, UE, &req->security_capabilities);
set_UE_security_algos(rrc, UE, &req->security_capabilities);
set_UE_security_key(UE, req->security_key);
/* configure only integrity, ciphering comes after receiving SecurityModeComplete */
@@ -591,44 +591,29 @@ static e_NR_IntegrityProtAlgorithm rrc_gNB_select_integrity(const gNB_RRC_INST *
return ret;
}
static bool rrc_gNB_process_security(const gNB_RRC_INST *rrc, gNB_RRC_UE_t *UE, ngap_security_capabilities_t *security_capabilities_pP)
/*
* \brief set security algorithms
* \param rrc pointer to RRC context
* \param UE UE context
* \param cap security capabilities for this UE
*/
static void set_UE_security_algos(const gNB_RRC_INST *rrc, gNB_RRC_UE_t *UE, const ngap_security_capabilities_t *cap)
{
bool changed = false;
NR_CipheringAlgorithm_t cipheringAlgorithm;
e_NR_IntegrityProtAlgorithm integrityProtAlgorithm;
/* Save security parameters */
UE->security_capabilities = *security_capabilities_pP;
// translation
LOG_D(NR_RRC,
"NAS security_capabilities.encryption_algorithms %u AS ciphering_algorithm %lu NAS security_capabilities.integrity_algorithms %u AS integrity_algorithm %u\n",
UE->security_capabilities.nRencryption_algorithms,
(unsigned long)UE->ciphering_algorithm,
UE->security_capabilities.nRintegrity_algorithms,
UE->integrity_algorithm);
UE->security_capabilities = *cap;
/* Select relevant algorithms */
cipheringAlgorithm = rrc_gNB_select_ciphering(rrc, UE->security_capabilities.nRencryption_algorithms);
NR_CipheringAlgorithm_t cipheringAlgorithm = rrc_gNB_select_ciphering(rrc, cap->nRencryption_algorithms);
e_NR_IntegrityProtAlgorithm integrityProtAlgorithm = rrc_gNB_select_integrity(rrc, cap->nRintegrity_algorithms);
if (UE->ciphering_algorithm != cipheringAlgorithm) {
UE->ciphering_algorithm = cipheringAlgorithm;
changed = true;
}
integrityProtAlgorithm = rrc_gNB_select_integrity(rrc, UE->security_capabilities.nRintegrity_algorithms);
if (UE->integrity_algorithm != integrityProtAlgorithm) {
UE->integrity_algorithm = integrityProtAlgorithm;
changed = true;
}
UE->ciphering_algorithm = cipheringAlgorithm;
UE->integrity_algorithm = integrityProtAlgorithm;
LOG_I(NR_RRC,
"[UE %d] Selected security algorithms (%p): ciphering %lx, integrity %x (algorithms %s)\n",
"[UE %d] Selected security algorithms: ciphering %lx, integrity %x\n",
UE->rrc_ue_id,
security_capabilities_pP,
cipheringAlgorithm,
integrityProtAlgorithm,
changed ? "changed" : "are the same");
return changed;
integrityProtAlgorithm);
}
//------------------------------------------------------------------------------