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-rw-r--r--tests/auth/milenage_test.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/tests/auth/milenage_test.c b/tests/auth/milenage_test.c
index 2bd3cf20..8b058e56 100644
--- a/tests/auth/milenage_test.c
+++ b/tests/auth/milenage_test.c
@@ -23,7 +23,10 @@ static void dump_auth_vec(struct osmo_auth_vector *vec)
if (vec->auth_types & OSMO_AUTH_TYPE_GSM) {
printf("SRES:\t%s\n", osmo_hexdump(vec->sres, sizeof(vec->sres)));
- printf("Kc:\t%s\n", osmo_hexdump(vec->kc, sizeof(vec->kc)));
+ /* According to 3GPP TS 55.205 Sec. 4 the GSM-MILENAGE output is limited to 64 bits.
+ According to 3GPP TS 33.102 Annex. B5 in UMTS security context Kc can be 128 bits.
+ Here we test the former, so make sure we only print interesting Kc bits. */
+ printf("Kc:\t%s\n", osmo_hexdump(vec->kc, OSMO_A5_MAX_KEY_LEN_BYTES/2));
}
}