mirror of https://github.com/morpheus65535/bazarr
119 lines
4.7 KiB
Python
119 lines
4.7 KiB
Python
# 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 struct
|
|
|
|
import dns.dnssec
|
|
import dns.immutable
|
|
import dns.exception
|
|
import dns.rdata
|
|
|
|
|
|
@dns.immutable.immutable
|
|
class TKEY(dns.rdata.Rdata):
|
|
|
|
"""TKEY Record"""
|
|
|
|
__slots__ = ['algorithm', 'inception', 'expiration', 'mode', 'error',
|
|
'key', 'other']
|
|
|
|
def __init__(self, rdclass, rdtype, algorithm, inception, expiration,
|
|
mode, error, key, other=b''):
|
|
super().__init__(rdclass, rdtype)
|
|
self.algorithm = self._as_name(algorithm)
|
|
self.inception = self._as_uint32(inception)
|
|
self.expiration = self._as_uint32(expiration)
|
|
self.mode = self._as_uint16(mode)
|
|
self.error = self._as_uint16(error)
|
|
self.key = self._as_bytes(key)
|
|
self.other = self._as_bytes(other)
|
|
|
|
def to_text(self, origin=None, relativize=True, **kw):
|
|
_algorithm = self.algorithm.choose_relativity(origin, relativize)
|
|
text = '%s %u %u %u %u %s' % (str(_algorithm), self.inception,
|
|
self.expiration, self.mode, self.error,
|
|
dns.rdata._base64ify(self.key, 0))
|
|
if len(self.other) > 0:
|
|
text += ' %s' % (dns.rdata._base64ify(self.other, 0))
|
|
|
|
return text
|
|
|
|
@classmethod
|
|
def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True,
|
|
relativize_to=None):
|
|
algorithm = tok.get_name(relativize=False)
|
|
inception = tok.get_uint32()
|
|
expiration = tok.get_uint32()
|
|
mode = tok.get_uint16()
|
|
error = tok.get_uint16()
|
|
key_b64 = tok.get_string().encode()
|
|
key = base64.b64decode(key_b64)
|
|
other_b64 = tok.concatenate_remaining_identifiers().encode()
|
|
other = base64.b64decode(other_b64)
|
|
|
|
return cls(rdclass, rdtype, algorithm, inception, expiration, mode,
|
|
error, key, other)
|
|
|
|
def _to_wire(self, file, compress=None, origin=None, canonicalize=False):
|
|
self.algorithm.to_wire(file, compress, origin)
|
|
file.write(struct.pack("!IIHH", self.inception, self.expiration,
|
|
self.mode, self.error))
|
|
file.write(struct.pack("!H", len(self.key)))
|
|
file.write(self.key)
|
|
file.write(struct.pack("!H", len(self.other)))
|
|
if len(self.other) > 0:
|
|
file.write(self.other)
|
|
|
|
@classmethod
|
|
def from_wire_parser(cls, rdclass, rdtype, parser, origin=None):
|
|
algorithm = parser.get_name(origin)
|
|
inception, expiration, mode, error = parser.get_struct("!IIHH")
|
|
key = parser.get_counted_bytes(2)
|
|
other = parser.get_counted_bytes(2)
|
|
|
|
return cls(rdclass, rdtype, algorithm, inception, expiration, mode,
|
|
error, key, other)
|
|
|
|
# Constants for the mode field - from RFC 2930:
|
|
# 2.5 The Mode Field
|
|
#
|
|
# The mode field specifies the general scheme for key agreement or
|
|
# the purpose of the TKEY DNS message. Servers and resolvers
|
|
# supporting this specification MUST implement the Diffie-Hellman key
|
|
# agreement mode and the key deletion mode for queries. All other
|
|
# modes are OPTIONAL. A server supporting TKEY that receives a TKEY
|
|
# request with a mode it does not support returns the BADMODE error.
|
|
# The following values of the Mode octet are defined, available, or
|
|
# reserved:
|
|
#
|
|
# Value Description
|
|
# ----- -----------
|
|
# 0 - reserved, see section 7
|
|
# 1 server assignment
|
|
# 2 Diffie-Hellman exchange
|
|
# 3 GSS-API negotiation
|
|
# 4 resolver assignment
|
|
# 5 key deletion
|
|
# 6-65534 - available, see section 7
|
|
# 65535 - reserved, see section 7
|
|
SERVER_ASSIGNMENT = 1
|
|
DIFFIE_HELLMAN_EXCHANGE = 2
|
|
GSSAPI_NEGOTIATION = 3
|
|
RESOLVER_ASSIGNMENT = 4
|
|
KEY_DELETION = 5
|