Function LLVMFuzzerTestOneInput

src/fuzzerfidentify.cpp:55–131

extern file_check_list_t file_check_list;

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
{
  const size_t blocksize=65536;
  static unsigned char *buffer_start=NULL;
  static file_stat_t *file_stats=NULL;
  static char *filename=NULL;
  uint8_t *buffer;
  if(Size == 0)
    return 0;
  if(filename==NULL)
  {
    pid_t pid=getpid();
    filename=(char *)MALLOC(64);
    sprintf(filename, "sample%u", pid);
  }
  if(file_stats==NULL)
  {
    /* Enable all file formats */
    file_enable_t *file_enable;
    for(file_enable=array_file_enable;file_enable->file_hint!=NULL;file_enable++)
      file_enable->enable=1;
    file_stats=init_file_stats(array_file_enable);
  }
  if(buffer_start==NULL)
  {
    buffer_start=(unsigned char *)MALLOC(2*blocksize);
  }
  buffer=buffer_start+blocksize;
  memcpy(buffer, Data, (Size < blocksize ? Size : blocksize));
  {
    struct td_list_head *tmpl;
    file_recovery_t file_recovery_new;
    file_recovery_t file_recovery;
    reset_file_recovery(&file_recovery);
    file_recovery.blocksize=blocksize;
    file_recovery_new.blocksize=blocksize;
    file_recovery_new.file_stat=NULL;
    td_list_for_each(tmpl, &file_check_list.list)
    {
      struct td_list_head *tmp;
      const file_check_list_t *pos=td_list_entry_const(tmpl, const file_check_list_t, list);
      if(pos->offset <= blocksize)
      {
	td_list_for_each(tmp, &pos->file_checks[buffer[pos->offset]].list)
	{
	  const file_check_t *file_check=td_list_entry_const(tmp, const file_check_t, list);
	  if((file_check->length==0 ||
		(file_check->offset+file_check->length <=blocksize &&
		 memcmp(buffer + file_check->offset, file_check->value, file_check->length)==0)) &&
	      file_check->header_check(buffer, blocksize, 0, &file_recovery, &file_recovery_new)!=0)
	  {
	    file_recovery_new.file_stat=file_check->file_stat;
	    break;
	  }
	}
      }
      if(file_recovery_new.file_stat!=NULL)
	break;