1 files changed, 41 insertions, 0 deletions
diff --git a/fuzz/asn1_get_length_der_fuzzer.c b/fuzz/asn1_get_length_der_fuzzer.c
new file mode 100644
index 0000000..9cd1227
--- /dev/null
+++ b/fuzz/asn1_get_length_der_fuzzer.c
@@ -0,0 +1,41 @@
+/*
+ * Copyright(c) 2020 Free Software Foundation, Inc.
+ *
+ * This file is part of libtasn1.
+ *
+ * Libtasn1 is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Libtasn1 is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with libtasn1.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This fuzzer is testing asn1_get_length_der()'s robustness with arbitrary
+ * input data.
+ */
+
+#include <config.h>
+
+#include "libtasn1.h"
+#include "fuzzer.h"
+
+#define MAXDATASIZE 512
+
+int
+LLVMFuzzerTestOneInput (const uint8_t * data, size_t size)
+{
+  int ret_len;
+
+  if (size > MAXDATASIZE)	/* same as max_len = <MAXDATASIZE> in .options file */
+    return 0;
+
+  asn1_get_length_der (data, size, &ret_len);
+
+  return 0;
+}