Add FIDO U2F message and packet classes

device/u2f/u2f_message_fuzzer.cc

+// 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.
+
+#include <stddef.h>
+#include <stdint.h>
+#include <algorithm>
+#include "net/base/io_buffer.h"
+#include "u2f_message.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  size_t packet_size = 65;
+  size_t remaining_buffer = size;
+  uint8_t* start = const_cast<uint8_t*>(data);
+
+  scoped_refptr<net::IOBufferWithSize> buf(
+      new net::IOBufferWithSize(packet_size));
+  memcpy(buf->data(), start, std::min(packet_size, remaining_buffer));
+  scoped_refptr<device::U2fMessage> msg =
+      device::U2fMessage::CreateFromSerializedData(buf);
+
+  remaining_buffer -= std::min(remaining_buffer, packet_size);
+  start += packet_size;
+
+  while (remaining_buffer > 0) {
+    size_t buffer_size = std::min(packet_size, remaining_buffer);
+    scoped_refptr<net::IOBufferWithSize> tmp_buf(
+        new net::IOBufferWithSize(buffer_size));
+    memcpy(tmp_buf->data(), start, buffer_size);
+    msg->AddContinuationPacket(tmp_buf);
+    remaining_buffer -= std::min(remaining_buffer, buffer_size);
+    start += buffer_size;
+  }
+
+  return 0;
+}