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83 lines
2.8 KiB
83 lines
2.8 KiB
# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
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# Copyright (C) 2004-2007, 2009-2011 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 enum
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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.dnssec
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import dns.rdata
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# wildcard import
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__all__ = ["SEP", "REVOKE", "ZONE"] # noqa: F822
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class Flag(enum.IntFlag):
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SEP = 0x0001
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REVOKE = 0x0080
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ZONE = 0x0100
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@dns.immutable.immutable
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class DNSKEYBase(dns.rdata.Rdata):
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"""Base class for rdata that is like a DNSKEY record"""
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__slots__ = ['flags', 'protocol', 'algorithm', 'key']
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def __init__(self, rdclass, rdtype, flags, protocol, algorithm, key):
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super().__init__(rdclass, rdtype)
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self.flags = self._as_uint16(flags)
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self.protocol = self._as_uint8(protocol)
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self.algorithm = dns.dnssec.Algorithm.make(algorithm)
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self.key = self._as_bytes(key)
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def to_text(self, origin=None, relativize=True, **kw):
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return '%d %d %d %s' % (self.flags, self.protocol, self.algorithm,
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dns.rdata._base64ify(self.key, **kw))
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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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flags = tok.get_uint16()
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protocol = tok.get_uint8()
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algorithm = tok.get_string()
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b64 = tok.concatenate_remaining_identifiers().encode()
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key = base64.b64decode(b64)
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return cls(rdclass, rdtype, flags, protocol, algorithm, key)
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def _to_wire(self, file, compress=None, origin=None, canonicalize=False):
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header = struct.pack("!HBB", self.flags, self.protocol, self.algorithm)
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file.write(header)
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file.write(self.key)
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@classmethod
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def from_wire_parser(cls, rdclass, rdtype, parser, origin=None):
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header = parser.get_struct('!HBB')
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key = parser.get_remaining()
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return cls(rdclass, rdtype, header[0], header[1], header[2],
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key)
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### BEGIN generated Flag constants
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SEP = Flag.SEP
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REVOKE = Flag.REVOKE
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ZONE = Flag.ZONE
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### END generated Flag constants
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