1 files changed, 43 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/fuzzer/asn1.cpp b/comm/third_party/botan/src/fuzzer/asn1.cpp
new file mode 100644
index 0000000000..89073991d1
--- /dev/null
+++ b/comm/third_party/botan/src/fuzzer/asn1.cpp
@@ -0,0 +1,43 @@
+/*
+* (C) 2016,2017 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include "fuzzers.h"
+#include <botan/asn1_print.h>
+#include <fstream>
+
+class ASN1_Parser final : public Botan::ASN1_Formatter
+   {
+   public:
+      ASN1_Parser() : Botan::ASN1_Formatter(true, 64) {}
+
+   protected:
+      std::string format(Botan::ASN1_Tag, Botan::ASN1_Tag, size_t, size_t,
+                         const std::string&) const override
+         {
+         return "";
+         }
+
+      std::string format_bin(Botan::ASN1_Tag, Botan::ASN1_Tag,
+                             const std::vector<uint8_t>&) const override
+         {
+         return "";
+         }
+   };
+
+void fuzz(const uint8_t in[], size_t len)
+   {
+   try
+      {
+      /*
+      * Here we use an uninitialized ofstream so the fuzzer doesn't spend time
+      * on actual output formatting, no memory is allocated, etc.
+      */
+      std::ofstream out;
+      ASN1_Parser printer;
+      printer.print_to_stream(out, in, len);
+      }
+   catch(Botan::Exception& e) { }
+   }