fix 'lf em 4x50_read - now checks if have enough data in Graphbuffer

2019-09-19 13:12:48 +02:00
parent aa2f80795d
commit a3161ae9a2
1 changed files with 6 additions and 0 deletions
--- a/client/cmdlfem4x.c
+++ b/client/cmdlfem4x.c
@@ -821,6 +821,12 @@ int EM4x50Read(const char *Cmd, bool verbose) {

    uint8_t bits[MAX_GRAPH_TRACE_LEN] = {0};
    size_t size = getFromGraphBuf(bits);
+
+    if (size < 4000) {
+       if (verbose || g_debugMode) PrintAndLogEx(ERR, "Error: EM4x50 - Too little data in Graphbuffer");
+       return PM3_ESOFT;
+    }
+
    computeSignalProperties(bits, size);

    signal_t *sp = getSignalProperties();