Ejemplo n.º 1
0
static dbus_bool_t
generate_and_write_nonce (const DBusString *filename, DBusError *error)
{
  DBusString nonce;
  dbus_bool_t ret;

  _DBUS_ASSERT_ERROR_IS_CLEAR (error);

  if (!_dbus_string_init (&nonce))
    {
      dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
      return FALSE;
    }

  if (!_dbus_generate_random_bytes (&nonce, 16))
    {
      dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
      _dbus_string_free (&nonce);
      return FALSE;
    }

  ret = _dbus_string_save_to_file (&nonce, filename, FALSE, error);

  _dbus_string_free (&nonce);

  return ret;
}
Ejemplo n.º 2
0
/**
 * Generates the given number of random bytes, where the bytes are
 * chosen from the alphanumeric ASCII subset.
 *
 * @param str the string
 * @param n_bytes the number of random ASCII bytes to append to string
 * @param error location to store reason for failure
 * @returns #TRUE on success, #FALSE if no memory or other failure
 */
dbus_bool_t
_dbus_generate_random_ascii (DBusString *str,
                             int         n_bytes,
                             DBusError  *error)
{
  static const char letters[] =
    "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";
  int i;
  int len;
  
  if (!_dbus_generate_random_bytes (str, n_bytes, error))
    return FALSE;
  
  len = _dbus_string_get_length (str);
  i = len - n_bytes;
  while (i < len)
    {
      _dbus_string_set_byte (str, i,
                             letters[_dbus_string_get_byte (str, i) %
                                     (sizeof (letters) - 1)]);

      ++i;
    }

  _dbus_assert (_dbus_string_validate_ascii (str, len - n_bytes,
                                             n_bytes));

  return TRUE;
}
Ejemplo n.º 3
0
/**
 * Fills n_bytes of the given buffer with random bytes.
 *
 * @param buffer an allocated buffer
 * @param n_bytes the number of bytes in buffer to write to
 */
void
_dbus_generate_random_bytes_buffer (char *buffer,
                                    int   n_bytes)
{
  DBusString str;

  if (!_dbus_string_init (&str))
    {
      _dbus_generate_pseudorandom_bytes_buffer (buffer, n_bytes);
      return;
    }

  if (!_dbus_generate_random_bytes (&str, n_bytes))
    {
      _dbus_string_free (&str);
      _dbus_generate_pseudorandom_bytes_buffer (buffer, n_bytes);
      return;
    }

  _dbus_string_copy_to_buffer (&str, buffer, n_bytes);

  _dbus_string_free (&str);
}
Ejemplo n.º 4
0
/**
 * Fills n_bytes of the given buffer with random bytes.
 *
 * @param buffer an allocated buffer
 * @param n_bytes the number of bytes in buffer to write to
 * @param error location to store reason for failure
 * @returns #TRUE on success
 */
dbus_bool_t
_dbus_generate_random_bytes_buffer (char      *buffer,
                                    int        n_bytes,
                                    DBusError *error)
{
  DBusString str;

  if (!_dbus_string_init (&str))
    {
      _DBUS_SET_OOM (error);
      return FALSE;
    }

  if (!_dbus_generate_random_bytes (&str, n_bytes, error))
    {
      _dbus_string_free (&str);
      return FALSE;
    }

  _dbus_string_copy_to_buffer (&str, buffer, n_bytes);

  _dbus_string_free (&str);
  return TRUE;
}