laforge has submitted this change. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/35366?usp=email )
Change subject: LTE_CryptoFunctions.ttcn: Increment nus.rx_count on each pkt read ...................................................................... LTE_CryptoFunctions.ttcn: Increment nus.rx_count on each pkt read Before this patch, the rx_count field was never set to anything other than zero. There's still a problem with counter not being incremented when a S1AP_IntialCtxSetupReq message containing a NAS_PDU is received. This will be fixed ina follow-up patch. Change-Id: I1ee25fd8fde6fbce95444ee4b73918ce1f61b427 --- M mme/LTE_CryptoFunctions.ttcn 1 file changed, 24 insertions(+), 0 deletions(-) Approvals: Jenkins Builder: Verified fixeria: Looks good to me, but someone else must approve laforge: Looks good to me, approved diff --git a/mme/LTE_CryptoFunctions.ttcn b/mme/LTE_CryptoFunctions.ttcn index 9923541..340b784 100644 --- a/mme/LTE_CryptoFunctions.ttcn +++ b/mme/LTE_CryptoFunctions.ttcn @@ -143,6 +143,12 @@ var octetstring data_with_seq := int2oct(secp_nas.sequenceNumber, 1) & secp_nas.nAS_Message; var OCT4 exp_mac := f_nas_mac_calc(nus.alg_int, nus.k_nas_int, nus.rx_count, 0, f_rx_is_downlink(nus), data_with_seq); + + if (nus.rx_count != secp_nas.sequenceNumber) { + setverdict(fail, "Received NAS SeqNr ", secp_nas.sequenceNumber, + " doesn't match expected SeqNr ", nus.rx_count, ": ", secp_nas, " | nus: ", nus); + return false; + } if (exp_mac != secp_nas.messageAuthenticationCode) { setverdict(fail, "Received NAS MAC ", secp_nas.messageAuthenticationCode, " doesn't match expected MAC ", exp_mac, ": ", secp_nas, " | nus: ", nus); @@ -173,12 +179,14 @@ return dec_PDU_NAS_EPS(secp_nas.nAS_Message); } case ('0001'B) { /* IP only */ + nus.rx_count := nus.rx_count + 1; if (not f_nas_check_ip(nus, secp_nas)) { Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "f_nas_check_ip() failed"); } return dec_PDU_NAS_EPS(secp_nas.nAS_Message); } case ('0010'B) { /* IP + ciphered */ + nus.rx_count := nus.rx_count + 1; if (not f_nas_check_ip(nus, secp_nas)) { Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "f_nas_check_ip() failed"); } -- To view, visit https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/35366?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-ttcn3-hacks Gerrit-Branch: master Gerrit-Change-Id: I1ee25fd8fde6fbce95444ee4b73918ce1f61b427 Gerrit-Change-Number: 35366 Gerrit-PatchSet: 4 Gerrit-Owner: pespin <pes...@sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria <vyanits...@sysmocom.de> Gerrit-Reviewer: laforge <lafo...@osmocom.org> Gerrit-Reviewer: osmith <osm...@sysmocom.de> Gerrit-MessageType: merged