diff options
| author | Neels Hofmeyr <neels@hofmeyr.de> | 2017-12-18 03:12:01 +0100 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2017-12-18 23:05:24 +0000 |
| commit | aa84b71f0fe014156e90dde2f0c44694368dc034 (patch) | |
| tree | e89ecebe87b71d8735b92bb35b7a8d656c6d516c /include | |
| parent | d589f1dcfddb672edddc84a06f0443569ac44bcc (diff) | |
add osmo_auth_c3() (separate from gsm_milenage())
To send a Ciphering Mode Command, we may need to derive a Kc from UMTS AKA
tokens. gsm_milenage() derives Kc from 3G tokens, but also derives an SRES.
For SRES, it requires an OPC, which may need to be derived from OP first. All
we need is a Kc, so we could feed a zero OPC ... but to simplify the function
call for cases where just a Kc is required, separate the c3 function out from
gsm_milenage(), as osmo_auth_c3(). Obviously call osmo_auth_c3() from
gsm_milenage() (meaning that osmo-hlr's 55.205 derived auc tests still cover
exactly that implementation).
Prepares: If04e405426c55a81341747a9b450a69188525d5c (osmo-msc)
Related: OS#2745
Change-Id: I85a1d6ae95ad9e5ce9524ef7fc06414848afc2aa
Diffstat (limited to 'include')
| -rw-r--r-- | include/osmocom/crypt/auth.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/osmocom/crypt/auth.h b/include/osmocom/crypt/auth.h index 4dbc6a4d..e544126b 100644 --- a/include/osmocom/crypt/auth.h +++ b/include/osmocom/crypt/auth.h @@ -105,4 +105,6 @@ void osmo_c4(uint8_t *ck, const uint8_t *kc); const char *osmo_auth_alg_name(enum osmo_auth_algo alg); enum osmo_auth_algo osmo_auth_alg_parse(const char *name); +void osmo_auth_c3(uint8_t kc[], const uint8_t ck[], const uint8_t ik[]); + /* @} */ |