diff options
| author | Neels Hofmeyr <nhofmeyr@sysmocom.de> | 2017-02-02 20:05:14 +0100 |
|---|---|---|
| committer | Neels Hofmeyr <nhofmeyr@sysmocom.de> | 2017-02-02 20:34:16 +0100 |
| commit | 8352d31a8666e328e399ba1d2ae581c8f0021e48 (patch) | |
| tree | 8a3599765d6481fdbfeeb481d221bfcd97712b7e /TODO-RELEASE | |
| parent | 4a7f87cdc848891f7306109a009e51684b6c5c0e (diff) | |
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
Diffstat (limited to 'TODO-RELEASE')
| -rw-r--r-- | TODO-RELEASE | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/TODO-RELEASE b/TODO-RELEASE index 5c6bfa3c..a23fcea7 100644 --- a/TODO-RELEASE +++ b/TODO-RELEASE @@ -8,3 +8,6 @@ # If any interfaces have been removed or changed since the last public release: c:r:0. #library what description / commit summary line libosmocore new function osmo_sock_get_name() +libosmogsm/gsup ABI change fix AUTS length to 14, not 16 (length is implicit) +libosmogsm/oap ABI change fix AUTS length to 14, not 16 (length is implicit) +osmo-auc-gen UI change fix AUTS length to 14, not 16 (length is implicit) |