fix ykfde if file exists

utils/pkgs/ykfde/scripts/ykfde_enroll

@@ -26,6 +26,10 @@ if [ "$YKFDE_SLOT_CHECK" != 1 ]; then
 fi
 
 YKFDE_SALT="$(dd if=/dev/random bs=1 count=$YKFDE_SALT_LENGTH 2>/dev/null | rbtohex)"
+if [ -f "$YKFDE_STORAGE" ]; then
+    YKFDE_SALT="$(head -1 $YKFDE_STORAGE)"
+    echo "$FILE exists."
+fi
 YKFDE_CHALLENGE="$(echo -n $YKFDE_SALT | openssl dgst -binary -sha512 | rbtohex)"
 YKFDE_RESPONSE="$(ykchalresp -2 -x $YKFDE_CHALLENGE 2>/dev/null)"
 YKFDE_K_LUKS="$(echo | pbkdf2-sha512 $(($YKFDE_KEY_LENGTH / 8)) $YKFDE_ITERATIONS $YKFDE_RESPONSE | rbtohex)"