mfkey64: abort if key recovery failed

2026-04-17 03:00:16 -04:00 · 2024-09-15 00:10:08 +02:00
parent febaa64b4d
commit 17bfed94da
1 changed files with 5 additions and 0 deletions
--- a/tools/mfc/card_reader/mfkey64.c
+++ b/tools/mfc/card_reader/mfkey64.c
@@ -73,6 +73,11 @@ int main(int argc, char *argv[]) {
    printf("  ks3: %08x\n", ks3);

    revstate = lfsr_recovery64(ks2, ks3);
+    if ((revstate->odd == 0) && (revstate->even == 0)) {
+        printf("\nKey not found :(\n\n");
+        crypto1_destroy(revstate);
+        return -1;
+    }

    // Decrypting communication using keystream if presented
    if (argc > 6) {