Current File : //lib/python3/dist-packages/dns/rdtypes/dnskeybase.py
# 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.dnssectypes
import dns.exception
import dns.immutable
import dns.rdata
# wildcard import
__all__ = ["SEP", "REVOKE", "ZONE"] # noqa: F822
class Flag(enum.IntFlag):
SEP = 0x0001
REVOKE = 0x0080
ZONE = 0x0100
@dns.immutable.immutable
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)
self.flags = Flag(self._as_uint16(flags))
self.protocol = self._as_uint8(protocol)
self.algorithm = dns.dnssectypes.Algorithm.make(algorithm)
self.key = self._as_bytes(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, **kw),
)
@classmethod
def from_text(
cls, rdclass, rdtype, tok, origin=None, relativize=True, relativize_to=None
):
flags = tok.get_uint16()
protocol = tok.get_uint8()
algorithm = 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
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