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# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
# Copyright (C) 2006, 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 struct
import base64
import dns.exception
import dns.immutable
import dns.rdtypes.util
class Gateway(dns.rdtypes.util.Gateway):
name = 'IPSECKEY gateway'
@dns.immutable.immutable
class IPSECKEY(dns.rdata.Rdata):
"""IPSECKEY record"""
# see: RFC 4025
__slots__ = ['precedence', 'gateway_type', 'algorithm', 'gateway', 'key']
def __init__(self, rdclass, rdtype, precedence, gateway_type, algorithm,
gateway, key):
super().__init__(rdclass, rdtype)
Gateway(gateway_type, gateway).check()
self.precedence = self.as_value(precedence)
self.gateway_type = self.as_value(gateway_type)
self.algorithm = self.as_value(algorithm)
self.gateway = self.as_value(gateway)
self.key = self.as_value(key)
def to_text(self, origin=None, relativize=True, **kw):
gateway = Gateway(self.gateway_type, self.gateway).to_text(origin,
relativize)
return '%d %d %d %s %s' % (self.precedence, self.gateway_type,
self.algorithm, gateway,
dns.rdata._base64ify(self.key))
@classmethod
def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True,
relativize_to=None):
precedence = tok.get_uint8()
gateway_type = tok.get_uint8()
algorithm = tok.get_uint8()
gateway = Gateway(gateway_type).from_text(tok, origin, relativize,
relativize_to)
b64 = tok.concatenate_remaining_identifiers().encode()
key = base64.b64decode(b64)
return cls(rdclass, rdtype, precedence, gateway_type, algorithm,
gateway, key)
def _to_wire(self, file, compress=None, origin=None, canonicalize=False):
header = struct.pack("!BBB", self.precedence, self.gateway_type,
self.algorithm)
file.write(header)
Gateway(self.gateway_type, self.gateway).to_wire(file, compress,
origin, canonicalize)
file.write(self.key)
@classmethod
def from_wire_parser(cls, rdclass, rdtype, parser, origin=None):
header = parser.get_struct('!BBB')
gateway_type = header[1]
gateway = Gateway(gateway_type).from_wire_parser(parser, origin)
key = parser.get_remaining()
return cls(rdclass, rdtype, header[0], gateway_type, header[2],
gateway, key)
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