From e72bcdb1c0587ac0ef0795179576ebfba0bdb2f2 Mon Sep 17 00:00:00 2001
From: iceman1001 <iceman@iuse.se>
Date: Mon, 14 Sep 2026 20:04:18 +0200
Subject: [PATCH] fix identifyer

---
 client/src/parsers/parsehexact.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/client/src/parsers/parsehexact.c b/client/src/parsers/parsehexact.c
index 37a9e13a8..44f8f87d8 100644
--- a/client/src/parsers/parsehexact.c
+++ b/client/src/parsers/parsehexact.c
@@ -323,6 +323,24 @@ int hexact_parser_parse(const uint8_t *dump, size_t dumplen) {
     uint8_t ser[4];
     memcpy(ser, id2, sizeof(ser));
 
+    // A card whose sector 0 block 2 has been wiped still carries identifier
+    // bytes in the payload, so read them back instead of failing 21 checks.
+    bool wiped = true;
+    for (uint8_t k = 0; k < 8; k++) {
+        if (s0b2[k]) {
+            wiped = false;
+            break;
+        }
+    }
+    if (wiped) {
+        PrintAndLogEx(INFO, "Identifier......... " _YELLOW_("wiped") ", recovered from the payload:");
+        PrintAndLogEx(INFO, "                    %02X %02X .. .. %02X .. .. %02X%s",
+                      rec[2][0], rec[2][1], rec[2][4], rec[2][7],
+                      (rec[1][1] == rec[2][1] && rec[1][4] == rec[2][4])
+                      ? "   ( two sources agree )" : "   ( sources DISAGREE )");
+        return PM3_SUCCESS;
+    }
+
     uint8_t total = 0;
     uint8_t pass = hexact_cross_check(rec, s0b2, uid, ser, &total, true);