From dc287c232f44af995df9663174cf8bb58e4d9258 Mon Sep 17 00:00:00 2001
From: Philippe Teuwen <phil@teuwen.org>
Date: Tue, 30 Jul 2024 13:23:08 +0200
Subject: [PATCH] hf mf isen: support n=0 to just get first auth data

---
 armsrc/mifarecmd.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/armsrc/mifarecmd.c b/armsrc/mifarecmd.c
index 78c50396c..6c27646b1 100644
--- a/armsrc/mifarecmd.c
+++ b/armsrc/mifarecmd.c
@@ -2825,6 +2825,19 @@ void MifareHasStaticEncryptedNonce(uint8_t block_no, uint8_t key_type, uint8_t *
     uint32_t old_nt;
     uint32_t ntenc;
     uint8_t ntencpar;
+    if (nr_nested == 0) {
+        cuid = 0;
+        if (iso14443a_select_card(NULL, NULL, &cuid, true, 0, true) == false) {
+            if (g_dbglevel >= DBG_ERROR) Dbprintf("Select error");
+            retval = PM3_ESOFT;
+            goto OUT;
+        }
+        if (mifare_classic_authex_cmd(pcs, cuid, block_no, key_auth_cmd, ui64key, AUTH_FIRST, &old_nt, NULL, NULL, NULL, corruptnrar, corruptnrarparity)) {
+            if (g_dbglevel >= DBG_ERROR) Dbprintf("Auth error");
+            retval = PM3_ESOFT;
+            goto OUT;
+        };
+    }
     for (uint8_t i = 0; i < nr_nested; i++) {
         if (need_first_auth) {
             cuid = 0;