mirror of https://github.com/morpheus65535/bazarr
83 lines
2.9 KiB
Python
83 lines
2.9 KiB
Python
# Copyright (C) 2005-2007, 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 struct
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import binascii
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import dns.rdata
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import dns.rdatatype
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class TLSA(dns.rdata.Rdata):
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"""TLSA record
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@ivar usage: The certificate usage
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@type usage: int
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@ivar selector: The selector field
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@type selector: int
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@ivar mtype: The 'matching type' field
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@type mtype: int
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@ivar cert: The 'Certificate Association Data' field
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@type cert: string
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@see: RFC 6698"""
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__slots__ = ['usage', 'selector', 'mtype', 'cert']
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def __init__(self, rdclass, rdtype, usage, selector,
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mtype, cert):
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super(TLSA, self).__init__(rdclass, rdtype)
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self.usage = usage
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self.selector = selector
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self.mtype = mtype
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self.cert = cert
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def to_text(self, origin=None, relativize=True, **kw):
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return '%d %d %d %s' % (self.usage,
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self.selector,
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self.mtype,
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dns.rdata._hexify(self.cert,
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chunksize=128))
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@classmethod
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def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
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usage = tok.get_uint8()
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selector = tok.get_uint8()
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mtype = tok.get_uint8()
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cert_chunks = []
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while 1:
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t = tok.get().unescape()
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if t.is_eol_or_eof():
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break
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if not t.is_identifier():
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raise dns.exception.SyntaxError
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cert_chunks.append(t.value.encode())
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cert = b''.join(cert_chunks)
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cert = binascii.unhexlify(cert)
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return cls(rdclass, rdtype, usage, selector, mtype, cert)
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def to_wire(self, file, compress=None, origin=None):
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header = struct.pack("!BBB", self.usage, self.selector, self.mtype)
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file.write(header)
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file.write(self.cert)
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@classmethod
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def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
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header = struct.unpack("!BBB", wire[current: current + 3])
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current += 3
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rdlen -= 3
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cert = wire[current: current + rdlen].unwrap()
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return cls(rdclass, rdtype, header[0], header[1], header[2], cert)
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