mirror of https://github.com/morpheus65535/bazarr
78 lines
2.8 KiB
Python
78 lines
2.8 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 SSHFP(dns.rdata.Rdata):
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"""SSHFP record
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@ivar algorithm: the algorithm
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@type algorithm: int
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@ivar fp_type: the digest type
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@type fp_type: int
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@ivar fingerprint: the fingerprint
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@type fingerprint: string
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@see: draft-ietf-secsh-dns-05.txt"""
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__slots__ = ['algorithm', 'fp_type', 'fingerprint']
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def __init__(self, rdclass, rdtype, algorithm, fp_type,
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fingerprint):
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super(SSHFP, self).__init__(rdclass, rdtype)
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self.algorithm = algorithm
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self.fp_type = fp_type
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self.fingerprint = fingerprint
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def to_text(self, origin=None, relativize=True, **kw):
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return '%d %d %s' % (self.algorithm,
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self.fp_type,
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dns.rdata._hexify(self.fingerprint,
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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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algorithm = tok.get_uint8()
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fp_type = tok.get_uint8()
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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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chunks.append(t.value.encode())
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fingerprint = b''.join(chunks)
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fingerprint = binascii.unhexlify(fingerprint)
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return cls(rdclass, rdtype, algorithm, fp_type, fingerprint)
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def to_wire(self, file, compress=None, origin=None):
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header = struct.pack("!BB", self.algorithm, self.fp_type)
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file.write(header)
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file.write(self.fingerprint)
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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("!BB", wire[current: current + 2])
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current += 2
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rdlen -= 2
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fingerprint = wire[current: current + rdlen].unwrap()
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return cls(rdclass, rdtype, header[0], header[1], fingerprint)
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