Make C4 function globally available
This function perform 64 -> 128 bit key expansion which useful for
converting between UMTS CK and GSM Kc, A5/3 and A5/4, GEA3 and GEA4
keys.
Change-Id: I5a6c6deef6027cd6af144c9062d4c9166be26904
Related: OS#1582
diff --git a/include/osmocom/crypt/auth.h b/include/osmocom/crypt/auth.h
index bed48e7..37b8a8a 100644
--- a/include/osmocom/crypt/auth.h
+++ b/include/osmocom/crypt/auth.h
@@ -91,7 +91,7 @@
int osmo_auth_load(const char *path);
int osmo_auth_supported(enum osmo_auth_algo algo);
-
+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);