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-rw-r--r--openbsc/src/libiu/iu.c19
1 files changed, 2 insertions, 17 deletions
diff --git a/openbsc/src/libiu/iu.c b/openbsc/src/libiu/iu.c
index eacc2f85a..5d56a4a37 100644
--- a/openbsc/src/libiu/iu.c
+++ b/openbsc/src/libiu/iu.c
@@ -233,25 +233,10 @@ int iu_tx_sec_mode_cmd(struct ue_conn_ctx *uectx, struct gsm_auth_tuple *tp,
{
struct osmo_scu_prim *prim;
struct msgb *msg;
- uint8_t ik[16];
- uint8_t ck[16];
- unsigned int i;
-
- /* C5 function to derive IK from Kc */
- for (i = 0; i < 4; i++)
- ik[i] = tp->vec.kc[i] ^ tp->vec.kc[i+4];
- memcpy(ik+4, tp->vec.kc, 8);
- for (i = 12; i < 16; i++)
- ik[i] = ik[i-12];
-
- if (send_ck) {
- /* C4 function to derive CK from Kc */
- memcpy(ck, tp->vec.kc, 8);
- memcpy(ck+8, tp->vec.kc, 8);
- }
/* create RANAP message */
- msg = ranap_new_msg_sec_mod_cmd(ik, send_ck? ck : NULL, new_key ? RANAP_KeyStatus_new : RANAP_KeyStatus_old);
+ msg = ranap_new_msg_sec_mod_cmd(tp->vec.ik, send_ck? tp->vec.ck : NULL,
+ new_key ? RANAP_KeyStatus_new : RANAP_KeyStatus_old);
msg->l2h = msg->data;
/* wrap RANAP message in SCCP N-DATA.req */
prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim));