TestFuzzChannelCliprdr.c

 
#include <stddef.h>
#include <stdint.h>
 
#include <winpr/crt.h>
#include <winpr/stream.h>
#include <winpr/wlog.h>
 
#include <freerdp/channels/cliprdr.h>
 
#include "../../cliprdr_common.h"
 
static wLog* g_Log = nullptr;
 
static UINT32 fuzz_stream_len_u32(wStream* s)
{
  const size_t remaining = Stream_GetRemainingLength(s);
  return (remaining > UINT32_MAX) ? UINT32_MAX : (UINT32)remaining;
}
 
static void fuzz_format_list(wStream* s, BOOL longNames)
{
  CLIPRDR_FORMAT_LIST list = WINPR_C_ARRAY_INIT;
  list.common.dataLen = fuzz_stream_len_u32(s);
 
  if (cliprdr_read_format_list(g_Log, s, &list, longNames) == CHANNEL_RC_OK)
    cliprdr_free_format_list(&list);
}
 
static void fuzz_format_data_request(wStream* s)
{
  CLIPRDR_FORMAT_DATA_REQUEST request = WINPR_C_ARRAY_INIT;
  request.common.dataLen = fuzz_stream_len_u32(s);
  (void)cliprdr_read_format_data_request(s, &request);
}
 
static void fuzz_format_data_response(wStream* s)
{
  CLIPRDR_FORMAT_DATA_RESPONSE response = WINPR_C_ARRAY_INIT;
  response.common.dataLen = fuzz_stream_len_u32(s);
  (void)cliprdr_read_format_data_response(s, &response);
}
 
static void fuzz_file_contents_request(wStream* s)
{
  CLIPRDR_FILE_CONTENTS_REQUEST request = WINPR_C_ARRAY_INIT;
  request.common.dataLen = fuzz_stream_len_u32(s);
  (void)cliprdr_read_file_contents_request(s, &request);
}
 
static void fuzz_file_contents_response(wStream* s)
{
  CLIPRDR_FILE_CONTENTS_RESPONSE response = WINPR_C_ARRAY_INIT;
  const UINT32 dataLen = fuzz_stream_len_u32(s);
 
  response.common.dataLen = (dataLen >= 4) ? dataLen : 4;
  (void)cliprdr_read_file_contents_response(s, &response);
}
 
static void fuzz_unlock(wStream* s)
{
  CLIPRDR_UNLOCK_CLIPBOARD_DATA data = WINPR_C_ARRAY_INIT;
  data.common.dataLen = fuzz_stream_len_u32(s);
  (void)cliprdr_read_unlock_clipdata(s, &data);
}
 
int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
  if (size < 2)
    return 0;
  if (size > (1u << 20))
    return 0;
 
  if (!g_Log)
    g_Log = WLog_Get("fuzz.cliprdr");
 
  BOOL longNames = (data[1] & 0x1) != 0;
  const uint8_t* body = data + 2;
 
  wStream buffer = WINPR_C_ARRAY_INIT;
  wStream* s = Stream_StaticConstInit(&buffer, body, size - 2);
  if (!s)
    return 0;
 
  switch (data[0] % 6)
  {
    case 0:
      fuzz_format_list(s, longNames);
      break;
    case 1:
      fuzz_format_data_request(s);
      break;
    case 2:
      fuzz_format_data_response(s);
      break;
    case 3:
      fuzz_file_contents_request(s);
      break;
    case 4:
      fuzz_file_contents_response(s);
      break;
    case 5:
      fuzz_unlock(s);
      break;
    default:
      break;
  }
 
  return 0;
}