diff options
Diffstat (limited to 'lib/dnspython/dns/rdtypes/ANY/SSHFP.py')
-rw-r--r-- | lib/dnspython/dns/rdtypes/ANY/SSHFP.py | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/lib/dnspython/dns/rdtypes/ANY/SSHFP.py b/lib/dnspython/dns/rdtypes/ANY/SSHFP.py new file mode 100644 index 0000000000..bc54f5e260 --- /dev/null +++ b/lib/dnspython/dns/rdtypes/ANY/SSHFP.py @@ -0,0 +1,77 @@ +# Copyright (C) 2005-2007, 2009, 2010 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 struct + +import dns.rdata +import dns.rdatatype + +class SSHFP(dns.rdata.Rdata): + """SSHFP record + + @ivar algorithm: the algorithm + @type algorithm: int + @ivar fp_type: the digest type + @type fp_type: int + @ivar fingerprint: the fingerprint + @type fingerprint: string + @see: draft-ietf-secsh-dns-05.txt""" + + __slots__ = ['algorithm', 'fp_type', 'fingerprint'] + + def __init__(self, rdclass, rdtype, algorithm, fp_type, + fingerprint): + super(SSHFP, self).__init__(rdclass, rdtype) + self.algorithm = algorithm + self.fp_type = fp_type + self.fingerprint = fingerprint + + def to_text(self, origin=None, relativize=True, **kw): + return '%d %d %s' % (self.algorithm, + self.fp_type, + dns.rdata._hexify(self.fingerprint, + chunksize=128)) + + def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True): + algorithm = tok.get_uint8() + fp_type = tok.get_uint8() + fingerprint = tok.get_string() + fingerprint = fingerprint.decode('hex_codec') + tok.get_eol() + return cls(rdclass, rdtype, algorithm, fp_type, fingerprint) + + from_text = classmethod(from_text) + + def to_wire(self, file, compress = None, origin = None): + header = struct.pack("!BB", self.algorithm, self.fp_type) + file.write(header) + file.write(self.fingerprint) + + def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None): + header = struct.unpack("!BB", wire[current : current + 2]) + current += 2 + rdlen -= 2 + fingerprint = wire[current : current + rdlen] + return cls(rdclass, rdtype, header[0], header[1], fingerprint) + + from_wire = classmethod(from_wire) + + def _cmp(self, other): + hs = struct.pack("!BB", self.algorithm, self.fp_type) + ho = struct.pack("!BB", other.algorithm, other.fp_type) + v = cmp(hs, ho) + if v == 0: + v = cmp(self.fingerprint, other.fingerprint) + return v |