From d3c6c430a803156a494d590140727d8aa16e3d3d Mon Sep 17 00:00:00 2001
From: Philippe Teuwen <phil@teuwen.org>
Date: Fri, 3 Sep 2021 23:48:45 +0200
Subject: [PATCH] cppcheck avoid dereferencing potentially null pointer

---
 client/src/mifare/lrpcrypto.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/client/src/mifare/lrpcrypto.c b/client/src/mifare/lrpcrypto.c
index bf501e99b..5ee390ed5 100644
--- a/client/src/mifare/lrpcrypto.c
+++ b/client/src/mifare/lrpcrypto.c
@@ -144,6 +144,9 @@ void LRPIncCounter(uint8_t *ctr, size_t ctrlen) {
 void LRPEncode(LRPContext_t *ctx, uint8_t *data, size_t datalen, uint8_t *resp, size_t *resplen) {
     *resplen = 0;
 
+    if (data == NULL) {
+        return;
+    }
     uint8_t xdata[1024] = {0};
     memcpy(xdata, data, datalen);
     if (ctx->useBitPadding) {