/**
* 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);
}
/**
* 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;
}
static dbus_bool_t
_dbus_read_uuid_file_without_creating (const DBusString *filename,
DBusGUID *uuid,
DBusError *error)
{
DBusString contents;
DBusString decoded;
int end;
if (!_dbus_string_init (&contents))
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_string_init (&decoded))
{
_dbus_string_free (&contents);
_DBUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_file_get_contents (&contents, filename, error))
goto error;
_dbus_string_chop_white (&contents);
if (_dbus_string_get_length (&contents) != DBUS_UUID_LENGTH_HEX)
{
dbus_set_error (error, DBUS_ERROR_INVALID_FILE_CONTENT,
"UUID file '%s' should contain a hex string of length %d, not length %d, with no other text",
_dbus_string_get_const_data (filename),
DBUS_UUID_LENGTH_HEX,
_dbus_string_get_length (&contents));
goto error;
}
if (!_dbus_string_hex_decode (&contents, 0, &end, &decoded, 0))
{
_DBUS_SET_OOM (error);
goto error;
}
if (end == 0)
{
dbus_set_error (error, DBUS_ERROR_INVALID_FILE_CONTENT,
"UUID file '%s' contains invalid hex data",
_dbus_string_get_const_data (filename));
goto error;
}
if (_dbus_string_get_length (&decoded) != DBUS_UUID_LENGTH_BYTES)
{
dbus_set_error (error, DBUS_ERROR_INVALID_FILE_CONTENT,
"UUID file '%s' contains %d bytes of hex-encoded data instead of %d",
_dbus_string_get_const_data (filename),
_dbus_string_get_length (&decoded),
DBUS_UUID_LENGTH_BYTES);
goto error;
}
_dbus_string_copy_to_buffer (&decoded, uuid->as_bytes, DBUS_UUID_LENGTH_BYTES);
_dbus_string_free (&decoded);
_dbus_string_free (&contents);
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
return TRUE;
error:
_DBUS_ASSERT_ERROR_IS_SET (error);
_dbus_string_free (&contents);
_dbus_string_free (&decoded);
return FALSE;
}
