diff options
| author | Eric <ewild@sysmocom.de> | 2021-05-19 18:57:50 +0200 |
|---|---|---|
| committer | Eric <ewild@sysmocom.de> | 2021-06-16 16:43:23 +0200 |
| commit | 2f898265d0feb26363960de98929e4819dda546c (patch) | |
| tree | 92acf6bf1d04123a87e8b286d9b5c9f09b6aac62 /src/sgsn/gprs_llc.c | |
| parent | a33f00637e5a116fedcea2e89a609be76207b360 (diff) | |
add support for multiple encryption algorithms and a5/4
Change-Id: Ie6700c4e9d2df1eb5fde1b971e287b62668cc2de
Related: SYS#5324
Diffstat (limited to 'src/sgsn/gprs_llc.c')
| -rw-r--r-- | src/sgsn/gprs_llc.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/sgsn/gprs_llc.c b/src/sgsn/gprs_llc.c index 4fbf211d4..eea1cecfa 100644 --- a/src/sgsn/gprs_llc.c +++ b/src/sgsn/gprs_llc.c @@ -42,6 +42,8 @@ #include <osmocom/sgsn/gprs_sndcp_comp.h> #include <osmocom/sgsn/gprs_sndcp.h> +#include <osmocom/crypt/kdf.h> + const struct value_string gprs_llc_llme_state_names[] = { { GPRS_LLMS_UNASSIGNED, "UNASSIGNED" }, { GPRS_LLMS_ASSIGNED, "ASSIGNED" }, @@ -1042,8 +1044,13 @@ void gprs_llme_copy_key(struct sgsn_mm_ctx *mm, struct gprs_llc_llme *llme) llme->algo = mm->ciph_algo; if (llme->cksn != mm->auth_triplet.key_seq && mm->auth_triplet.key_seq != GSM_KEY_SEQ_INVAL) { - memcpy(llme->kc, mm->auth_triplet.vec.kc, - gprs_cipher_key_length(mm->ciph_algo)); + + /* gea4 needs kc128 */ + if (mm->ciph_algo == GPRS_ALGO_GEA4) + osmo_kdf_kc128(mm->auth_triplet.vec.ck, mm->auth_triplet.vec.ik, llme->kc); + else + memcpy(llme->kc, mm->auth_triplet.vec.kc, gprs_cipher_key_length(mm->ciph_algo)); + llme->cksn = mm->auth_triplet.key_seq; } } else |