Add a bunch of NSS ASN.1 fuzzers

testing/libfuzzer/fuzzers/nss/asn1_fuzzer_template.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ASN1_FUZZER_TEMPLATE_H_
+#define ASN1_FUZZER_TEMPLATE_H_
+
+#include <nspr.h>
+#include <nss.h>
+#include <secasn1.h>
+#include <secder.h>
+#include <secitem.h>
+#include <secport.h>
+#include <stddef.h>
+#include <stdint.h>
+
+template <typename DestinationType,
+          SECStatus (*DecodeFunction)(PLArenaPool*,
+                                      void*,
+                                      const SEC_ASN1Template*,
+                                      const SECItem*)>
+void NSSFuzzOneInput(const SEC_ASN1Template* the_template,
+                     const uint8_t* data,
+                     size_t size) {
+  DestinationType* destination = new DestinationType();
+  memset(destination, 0, sizeof(DestinationType));
+
+  PLArenaPool* arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
+  if (!arena) {
+    delete destination;
+    return;
+  }
+
+  SECItem source;
+  source.type = siBuffer;
+  source.data = static_cast<unsigned char*>(const_cast<uint8_t*>(data));
+  source.len = static_cast<unsigned int>(size);
+
+  DecodeFunction(arena, destination, the_template, &source);
+
+  PORT_FreeArena(arena, PR_FALSE);
+  delete destination;
+}
+
+#endif  // ASN1_FUZZER_TEMPLATE_H_