mirror of https://github.com/morpheus65535/bazarr
121 lines
4.4 KiB
Python
121 lines
4.4 KiB
Python
# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
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# Copyright (C) 2001-2017 Nominum, Inc.
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#
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# Permission to use, copy, modify, and distribute this software and its
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# documentation for any purpose with or without fee is hereby granted,
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# provided that the above copyright notice and this permission notice
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# appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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import base64
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import struct
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import dns.exception
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import dns.immutable
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import dns.rcode
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import dns.rdata
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@dns.immutable.immutable
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class TSIG(dns.rdata.Rdata):
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"""TSIG record"""
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__slots__ = ['algorithm', 'time_signed', 'fudge', 'mac',
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'original_id', 'error', 'other']
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def __init__(self, rdclass, rdtype, algorithm, time_signed, fudge, mac,
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original_id, error, other):
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"""Initialize a TSIG rdata.
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*rdclass*, an ``int`` is the rdataclass of the Rdata.
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*rdtype*, an ``int`` is the rdatatype of the Rdata.
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*algorithm*, a ``dns.name.Name``.
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*time_signed*, an ``int``.
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*fudge*, an ``int`.
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*mac*, a ``bytes``
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*original_id*, an ``int``
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*error*, an ``int``
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*other*, a ``bytes``
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"""
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super().__init__(rdclass, rdtype)
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self.algorithm = self._as_name(algorithm)
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self.time_signed = self._as_uint48(time_signed)
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self.fudge = self._as_uint16(fudge)
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self.mac = self._as_bytes(mac)
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self.original_id = self._as_uint16(original_id)
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self.error = dns.rcode.Rcode.make(error)
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self.other = self._as_bytes(other)
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def to_text(self, origin=None, relativize=True, **kw):
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algorithm = self.algorithm.choose_relativity(origin, relativize)
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error = dns.rcode.to_text(self.error, True)
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text = f"{algorithm} {self.time_signed} {self.fudge} " + \
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f"{len(self.mac)} {dns.rdata._base64ify(self.mac, 0)} " + \
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f"{self.original_id} {error} {len(self.other)}"
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if self.other:
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text += f" {dns.rdata._base64ify(self.other, 0)}"
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return text
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@classmethod
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def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True,
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relativize_to=None):
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algorithm = tok.get_name(relativize=False)
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time_signed = tok.get_uint48()
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fudge = tok.get_uint16()
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mac_len = tok.get_uint16()
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mac = base64.b64decode(tok.get_string())
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if len(mac) != mac_len:
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raise SyntaxError('invalid MAC')
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original_id = tok.get_uint16()
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error = dns.rcode.from_text(tok.get_string())
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other_len = tok.get_uint16()
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if other_len > 0:
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other = base64.b64decode(tok.get_string())
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if len(other) != other_len:
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raise SyntaxError('invalid other data')
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else:
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other = b''
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return cls(rdclass, rdtype, algorithm, time_signed, fudge, mac,
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original_id, error, other)
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def _to_wire(self, file, compress=None, origin=None, canonicalize=False):
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self.algorithm.to_wire(file, None, origin, False)
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file.write(struct.pack('!HIHH',
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(self.time_signed >> 32) & 0xffff,
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self.time_signed & 0xffffffff,
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self.fudge,
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len(self.mac)))
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file.write(self.mac)
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file.write(struct.pack('!HHH', self.original_id, self.error,
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len(self.other)))
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file.write(self.other)
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@classmethod
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def from_wire_parser(cls, rdclass, rdtype, parser, origin=None):
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algorithm = parser.get_name()
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time_signed = parser.get_uint48()
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fudge = parser.get_uint16()
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mac = parser.get_counted_bytes(2)
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(original_id, error) = parser.get_struct('!HH')
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other = parser.get_counted_bytes(2)
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return cls(rdclass, rdtype, algorithm, time_signed, fudge, mac,
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original_id, error, other)
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