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-rw-r--r--include/osmocom/crypt/auth.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/osmocom/crypt/auth.h b/include/osmocom/crypt/auth.h
index 6d2c783d..2f2a8d33 100644
--- a/include/osmocom/crypt/auth.h
+++ b/include/osmocom/crypt/auth.h
@@ -8,6 +8,8 @@
#include <osmocom/core/linuxlist.h>
+#define OSMO_A5_MAX_KEY_LEN_BYTES (128/8)
+
/*! Authentication Type (GSM/UMTS) */
enum osmo_sub_auth_type {
OSMO_AUTH_TYPE_NONE = 0x00,
@@ -42,7 +44,7 @@ struct osmo_sub_auth_data {
uint64_t sqn_ms; /*!< sqn from AUTS (output value only) */
} umts;
struct {
- uint8_t ki[16]; /*!< secret key */
+ uint8_t ki[OSMO_A5_MAX_KEY_LEN_BYTES]; /*!< secret key */
} gsm;
} u;
};