Imported Upstream version 4.19.0upstream/4.19.0upstream

1 files changed, 53 insertions, 0 deletions

diff --git a/fuzz/asn1_decode_simple_der_fuzzer.c b/fuzz/asn1_decode_simple_der_fuzzer.c
new file mode 100644
index 0000000..ee5445d
--- /dev/null
+++ b/fuzz/asn1_decode_simple_der_fuzzer.c
@@ -0,0 +1,53 @@
+/*
+ * 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_array2tree()'s robustness with arbitrary
+ * input data.
+ */
+
+#include <config.h>
+#include <assert.h>
+
+#include "libtasn1.h"
+#include "fuzzer.h"
+
+int
+LLVMFuzzerTestOneInput (const uint8_t * data, size_t size)
+{
+  int ret;
+  unsigned int ret_len;
+  const unsigned char *str;
+
+  ret =
+    asn1_decode_simple_der (ASN1_ETYPE_BIT_STRING, data, size, &str,
+			    &ret_len);
+  if (ret == ASN1_SUCCESS)
+    {
+      assert (ret_len <= size);
+    }
+
+  ret =
+    asn1_decode_simple_der (ASN1_ETYPE_OCTET_STRING, data, size, &str,
+			    &ret_len);
+  if (ret == ASN1_SUCCESS)
+    {
+      assert (ret_len <= size);
+    }
+
+  return 0;
+}