From 7f2abb32c7d4225e6df4e3eaa5ee89bddd085cc9 Mon Sep 17 00:00:00 2001
From: Daniel Seiller <earthnuker@gmail.com>
Date: Wed, 14 Aug 2019 21:07:45 +0200
Subject: [PATCH] First check for key B, then A when selecting exploit sector

---
 src/mfoc.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/mfoc.c b/src/mfoc.c
index 6ee0d5d..545c6c6 100644
--- a/src/mfoc.c
+++ b/src/mfoc.c
@@ -923,7 +923,13 @@ int find_exploit_sector(mftag t)
     return -1;
   }
   for (i = t.num_sectors-1; i>=0;--i) {
-    if ((t.sectors[i].foundKeyA) || (t.sectors[i].foundKeyB)) {
+    if (t.sectors[i].foundKeyB) {
+      fprintf(stdout, "\n\nUsing sector %02d as an exploit sector\n", i);
+      return i;
+    }
+  }
+  for (i = t.num_sectors-1; i>=0;--i) {
+    if (t.sectors[i].foundKeyA) {
       fprintf(stdout, "\n\nUsing sector %02d as an exploit sector\n", i);
       return i;
     }