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
|
# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
# Copyright (C) 2004-2007, 2009-2011 Nominum, Inc.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose with or without fee is hereby granted,
# provided that the above copyright notice and this permission notice
# appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
import base64
import enum
import struct
import dns.exception
import dns.dnssec
import dns.rdata
# wildcard import
__all__ = ["SEP", "REVOKE", "ZONE"] # noqa: F822
class Flag(enum.IntFlag):
SEP = 0x0001
REVOKE = 0x0080
ZONE = 0x0100
class DNSKEYBase(dns.rdata.Rdata):
"""Base class for rdata that is like a DNSKEY record"""
__slots__ = ['flags', 'protocol', 'algorithm', 'key']
def __init__(self, rdclass, rdtype, flags, protocol, algorithm, key):
super().__init__(rdclass, rdtype)
object.__setattr__(self, 'flags', flags)
object.__setattr__(self, 'protocol', protocol)
object.__setattr__(self, 'algorithm', algorithm)
object.__setattr__(self, 'key', key)
def to_text(self, origin=None, relativize=True, **kw):
return '%d %d %d %s' % (self.flags, self.protocol, self.algorithm,
dns.rdata._base64ify(self.key))
@classmethod
def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True,
relativize_to=None):
flags = tok.get_uint16()
protocol = tok.get_uint8()
algorithm = dns.dnssec.algorithm_from_text(tok.get_string())
b64 = tok.concatenate_remaining_identifiers().encode()
key = base64.b64decode(b64)
return cls(rdclass, rdtype, flags, protocol, algorithm, key)
def _to_wire(self, file, compress=None, origin=None, canonicalize=False):
header = struct.pack("!HBB", self.flags, self.protocol, self.algorithm)
file.write(header)
file.write(self.key)
@classmethod
def from_wire_parser(cls, rdclass, rdtype, parser, origin=None):
header = parser.get_struct('!HBB')
key = parser.get_remaining()
return cls(rdclass, rdtype, header[0], header[1], header[2],
key)
### BEGIN generated flag constants
SEP = Flag.SEP
REVOKE = Flag.REVOKE
ZONE = Flag.ZONE
### END generated flag constants
|