def _Open(self, mode='rb'):
"""Opens the file system defined by path specification.
Args:
mode (Optional[str]): file access mode. The default is 'rb'
read-only binary.
Raises:
AccessError: if the access to open the file was denied.
IOError: if the file system could not be opened.
PathSpecError: if the path specification is incorrect.
ValueError: if the path specification is invalid.
"""
if not self._path_spec.HasParent():
raise errors.PathSpecError(
'Unsupported path specification without parent.')
resolver.Resolver.key_chain.ExtractCredentialsFromPathSpec(
self._path_spec)
fvde_volume = pyfvde.volume()
file_object = resolver.Resolver.OpenFileObject(
self._path_spec.parent, resolver_context=self._resolver_context)
fvde.FVDEVolumeOpen(fvde_volume, self._path_spec, file_object,
resolver.Resolver.key_chain)
self._fvde_volume = fvde_volume
self._file_object = file_object
def _OpenFileObject(self, path_spec):
"""Opens the file-like object defined by path specification.
Args:
path_spec (PathSpec): path specification.
Returns:
A file-like object.
Raises:
PathSpecError: if the path specification is incorrect.
"""
if not path_spec.HasParent():
raise errors.PathSpecError(
u'Unsupported path specification without parent.')
file_object = resolver.Resolver.OpenFileObject(
path_spec.parent, resolver_context=self._resolver_context)
fvde_volume = pyfvde.volume()
fvde.FVDEVolumeOpen(fvde_volume, path_spec, file_object,
resolver.Resolver.key_chain)
return fvde_volume