Increasing random buffer and checks.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
2022-03-10 00:13:13 +01:00
parent 213b675b9f
commit f1c0b12f5c
2 changed files with 8 additions and 2 deletions
--- a/src/hsm/sc_hsm.c
+++ b/src/hsm/sc_hsm.c
@@ -420,7 +420,10 @@ static int cmd_reset_retry() {
 }

 static int cmd_challenge() {
-    res_APDU = (uint8_t *)random_bytes_get(apdu.expected_res_size);
+    uint8_t *rb = (uint8_t *)random_bytes_get(apdu.expected_res_size);
+    if (!rb)
+        return SW_WRONG_LENGTH();
+    res_APDU = rb;
    res_APDU_size = apdu.expected_res_size;
    return SW_OK();
 }