--- /dev/null
+# Copyright (C) 2004-2009 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 cStringIO
+import struct
+
+import dns.exception
+import dns.rdata
+
+class NSEC3PARAM(dns.rdata.Rdata):
+ """NSEC3PARAM record
+
+ @ivar algorithm: the hash algorithm number
+ @type algorithm: int
+ @ivar flags: the flags
+ @type flags: int
+ @ivar iterations: the number of iterations
+ @type iterations: int
+ @ivar salt: the salt
+ @type salt: string"""
+
+ __slots__ = ['algorithm', 'flags', 'iterations', 'salt']
+
+ def __init__(self, rdclass, rdtype, algorithm, flags, iterations, salt):
+ super(NSEC3PARAM, self).__init__(rdclass, rdtype)
+ self.algorithm = algorithm
+ self.flags = flags
+ self.iterations = iterations
+ self.salt = salt
+
+ def to_text(self, origin=None, relativize=True, **kw):
+ if self.salt == '':
+ salt = '-'
+ else:
+ salt = self.salt.encode('hex-codec')
+ return '%u %u %u %s' % (self.algorithm, self.flags, self.iterations, salt)
+
+ def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True):
+ algorithm = tok.get_uint8()
+ flags = tok.get_uint8()
+ iterations = tok.get_uint16()
+ salt = tok.get_string()
+ if salt == '-':
+ salt = ''
+ else:
+ salt = salt.decode('hex-codec')
+ return cls(rdclass, rdtype, algorithm, flags, iterations, salt)
+
+ from_text = classmethod(from_text)
+
+ def to_wire(self, file, compress = None, origin = None):
+ l = len(self.salt)
+ file.write(struct.pack("!BBHB", self.algorithm, self.flags,
+ self.iterations, l))
+ file.write(self.salt)
+
+ def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None):
+ (algorithm, flags, iterations, slen) = struct.unpack('!BBHB',
+ wire[current : current + 5])
+ current += 5
+ rdlen -= 5
+ salt = wire[current : current + slen]
+ current += slen
+ rdlen -= slen
+ if rdlen != 0:
+ raise dns.exception.FormError
+ return cls(rdclass, rdtype, algorithm, flags, iterations, salt)
+
+ from_wire = classmethod(from_wire)
+
+ def _cmp(self, other):
+ b1 = cStringIO.StringIO()
+ self.to_wire(b1)
+ b2 = cStringIO.StringIO()
+ other.to_wire(b2)
+ return cmp(b1.getvalue(), b2.getvalue())
projects / thirdparty / dnspython.git / commitdiff
