def read(self, istream):
super(GetRequestPayload, self).read(istream)
tstream = BytearrayStream(istream.read(self.length))
if self.is_tag_next(Tags.UNIQUE_IDENTIFIER, tstream):
self.unique_identifier = attributes.UniqueIdentifier()
self.unique_identifier.read(tstream)
if self.is_tag_next(Tags.KEY_FORMAT_TYPE, tstream):
self.key_format_type = GetRequestPayload.KeyFormatType()
self.key_format_type.read(tstream)
if self.is_tag_next(Tags.KEY_COMPRESSION_TYPE, tstream):
self.key_compression_type = GetRequestPayload.KeyCompressionType()
self.key_compression_type.read(tstream)
if self.is_tag_next(Tags.KEY_WRAPPING_SPECIFICATION, tstream):
self.key_wrapping_specification = KeyWrappingSpecification()
self.key_wrapping_specification.read(tstream)
self.is_oversized(tstream)
self.validate()
