2 Feb
2017
2 Feb
'17
8:50 p.m.
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- Log -----------------------------------------------------------------
http://cgit.osmocom.org/libosmocore/commit/?id=55a43b801385e07a484217925ecf…
commit 55a43b801385e07a484217925ecf2379b9f54fcf
Author: Neels Hofmeyr <nhofmeyr(a)sysmocom.de>
Date: Thu Feb 2 20:27:55 2017 +0100
gsm48: add UMTS AKA res+sync IEIs, msg type and cause val
According to 3GPP TS 24.008 9.2.3a, 9.2.3, 10.5.3.6
Change-Id: I745061ce8eb88aa23080dadcdbfe2d703c362a30
http://cgit.osmocom.org/libosmocore/commit/?id=8352d31a8666e328e399ba1d2ae5…
commit 8352d31a8666e328e399ba1d2ae581c8f0021e48
Author: Neels Hofmeyr <nhofmeyr(a)sysmocom.de>
Date: Thu Feb 2 20:05:14 2017 +0100
GSUP, OAP, osmo-gen-vec: fix AUTS length to 14, not 16
GSUP transmits AUTS for UMTS authentication procedures, and OAP uses the same
procedures to authenticate. osmo-gen-vec is a utility program that passes AUTS
to our osmo_auth_gen_vec_auts() API.
According to 3GPP 33.102 6.3.3, AUTS = SQN^AK || MAC-S, which are 6 || 8 == 14
bytes. This is confirmed by 24.008 9.2.3a where the TLV has 16 bytes, TL = 2
and AUTS being the V = 14.
It is not harmful for milenage_gen_vec_auts() to pass two more AUTS bytes. But
writing 16 bytes to a GSUP struct is a potential problem when passing in a 14
byte long AUTS buffer to the GSUP API, which then reads past the AUTS buffer.
The API implies the length, so far to be 16, so passing in a 14 byte buffer to
GSUP would require copying to a larger buffer first.
Fix this by using a length of 14 for AUTS everywhere instead.
This constitues an ABI breakage, we may handle it as a "fix before an official
release", otherwise we need a version bump.
The OAP protocol document has also been updated, needs an update in the
osmo-gsm-manuals as well.
Change-Id: If25b173d9ec57ea4c504d860954912b7d82af455
-----------------------------------------------------------------------
Summary of changes:
TODO-RELEASE | 3 +++
doc/osmocom-authn-protocol.txt | 2 +-
include/osmocom/gsm/oap.h | 2 +-
include/osmocom/gsm/protocol/gsm_04_08.h | 4 ++++
src/gsm/gsup.c | 2 +-
tests/oap/oap_test.c | 4 ++--
tests/oap/oap_test.ok | 2 +-
utils/osmo-auc-gen.c | 2 +-
8 files changed, 14 insertions(+), 7 deletions(-)
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An utility library for Open Source Mobile Communications