Package dns :: Package rdtypes :: Package ANY :: Module SIG |
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# Source Code for Module dns.rdtypes.ANY.SIG

     1  # Copyright (C) 2003-2007, 2009, 2010 Nominum, Inc.
     2  #
     3  # Permission to use, copy, modify, and distribute this software and its
     4  # documentation for any purpose with or without fee is hereby granted,
     5  # provided that the above copyright notice and this permission notice
     6  # appear in all copies.
     7  #
     8  # THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
     9  # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
    10  # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
    11  # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    12  # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
    13  # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
    14  # OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
    15
    16  import struct
    17
    18  import dns.rdtypes.sigbase
    19
    20 -class SIG(dns.rdtypes.sigbase.SIGBase):
    21      """SIG record"""
    22 -    def to_digestable(self, origin = None):
    23          return struct.pack('!HBBIIIH', self.type_covered,
    24                             self.algorithm, self.labels,
    25                             self.original_ttl, self.expiration,
    26                             self.inception, self.key_tag) + \
    27                             self.signer.to_digestable(origin) + \
    28                             self.signature
    29 -    def _cmp(self, other):
    30          hs = struct.pack('!HBBIIIH', self.type_covered,
    31                           self.algorithm, self.labels,
    32                           self.original_ttl, self.expiration,
    33                           self.inception, self.key_tag)
    34          ho = struct.pack('!HBBIIIH', other.type_covered,
    35                           other.algorithm, other.labels,
    36                           other.original_ttl, other.expiration,
    37                           other.inception, other.key_tag)
    38          v = cmp(hs, ho)
    39          if v == 0:
    40              v = cmp(self.signer, other.signer)
    41              if v == 0:
    42                  v = cmp(self.signature, other.signature)
    43          return v
    44