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""" subpacket.py
"""
import abc
from ..types import VersionedHeader
from ...decorators import sdproperty
from ...types import Dispatchable
from ...types import Header as _Header
__all__ = ['Header',
'EmbeddedSignatureHeader',
'SubPacket',
'Signature',
'UserAttribute',
'Opaque']
class Header(_Header):
@sdproperty
def critical(self):
return self._critical
@critical.register(bool)
def critical_bool(self, val):
self._critical = val
@sdproperty
def typeid(self):
return self._typeid
@typeid.register(int)
def typeid_int(self, val):
self._typeid = val & 0x7f
@typeid.register(bytes)
@typeid.register(bytearray)
def typeid_bin(self, val):
v = self.bytes_to_int(val)
self.typeid = v
self.critical = bool(v & 0x80)
def __init__(self):
super(Header, self).__init__()
self.typeid = b'\x00'
self.critical = False
def parse(self, packet):
self.length = packet
self.typeid = packet[:1]
del packet[:1]
def __len__(self):
return self.llen + 1
def __bytearray__(self):
_bytes = bytearray(self.encode_length(self.length))
_bytes += self.int_to_bytes((int(self.critical) << 7) + self.typeid)
return _bytes
class EmbeddedSignatureHeader(VersionedHeader):
def __bytearray__(self):
return bytearray([self.version])
def parse(self, packet):
self.tag = 2
super(EmbeddedSignatureHeader, self).parse(packet)
class SubPacket(Dispatchable):
__headercls__ = Header
def __init__(self):
super(SubPacket, self).__init__()
self.header = Header()
# if self.__typeid__ not in [-1, None]:
if (self.header.typeid == 0x00 and
(not hasattr(self.__typeid__, '__abstractmethod__')) and
(self.__typeid__ not in [-1, None])):
self.header.typeid = self.__typeid__
def __bytearray__(self):
return self.header.__bytearray__()
def __len__(self):
return (self.header.llen + self.header.length)
def __repr__(self):
return "<{} [0x{:02x}] at 0x{:x}>".format(self.__class__.__name__, self.header.typeid, id(self))
def update_hlen(self):
self.header.length = (len(self.__bytearray__()) - len(self.header)) + 1
@abc.abstractmethod
def parse(self, packet): # pragma: no cover
if self.header._typeid == 0:
self.header.parse(packet)
class Signature(SubPacket):
__typeid__ = -1
class UserAttribute(SubPacket):
__typeid__ = -1
class Opaque(Signature, UserAttribute):
__typeid__ = None
@sdproperty
def payload(self):
return self._payload
@payload.register(bytes)
@payload.register(bytearray)
def payload_bin(self, val):
self._payload = bytearray(val)
def __init__(self):
super(Opaque, self).__init__()
self.payload = b''
def __bytearray__(self):
_bytes = super(Opaque, self).__bytearray__()
_bytes += self.payload
return _bytes
def parse(self, packet):
super(Opaque, self).parse(packet)
self.payload = packet[:(self.header.length - 1)]
del packet[:(self.header.length - 1)]
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