1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
""" 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 = -1
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.header.typeid == -1
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 == -1:
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)]
|
