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ANY
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AFSDB.py
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AVC.py
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CAA.py
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CDNSKEY.py
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CDS.py
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CERT.py
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CNAME.py
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CSYNC.py
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DLV.py
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DNAME.py
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DNSKEY.py
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DS.py
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EUI48.py
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EUI64.py
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GPOS.py
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HINFO.py
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HIP.py
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ISDN.py
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LOC.py
(11.98 KB)
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MX.py
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NS.py
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NSEC.py
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NSEC3.py
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NSEC3PARAM.py
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PTR.py
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RP.py
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RRSIG.py
(5.53 KB)
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RT.py
(891 B)
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SOA.py
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SPF.py
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SSHFP.py
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TLSA.py
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TXT.py
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URI.py
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X25.py
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__init__.py
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__pycache__
Editing: RRSIG.py
# Copyright (C) 2004-2007, 2009-2011 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 base64 import calendar import struct import time import dns.dnssec import dns.exception import dns.rdata import dns.rdatatype class BadSigTime(dns.exception.DNSException): """Time in DNS SIG or RRSIG resource record cannot be parsed.""" def sigtime_to_posixtime(what): if len(what) != 14: raise BadSigTime year = int(what[0:4]) month = int(what[4:6]) day = int(what[6:8]) hour = int(what[8:10]) minute = int(what[10:12]) second = int(what[12:14]) return calendar.timegm((year, month, day, hour, minute, second, 0, 0, 0)) def posixtime_to_sigtime(what): return time.strftime('%Y%m%d%H%M%S', time.gmtime(what)) class RRSIG(dns.rdata.Rdata): """RRSIG record @ivar type_covered: the rdata type this signature covers @type type_covered: int @ivar algorithm: the algorithm used for the sig @type algorithm: int @ivar labels: number of labels @type labels: int @ivar original_ttl: the original TTL @type original_ttl: long @ivar expiration: signature expiration time @type expiration: long @ivar inception: signature inception time @type inception: long @ivar key_tag: the key tag @type key_tag: int @ivar signer: the signer @type signer: dns.name.Name object @ivar signature: the signature @type signature: string""" __slots__ = ['type_covered', 'algorithm', 'labels', 'original_ttl', 'expiration', 'inception', 'key_tag', 'signer', 'signature'] def __init__(self, rdclass, rdtype, type_covered, algorithm, labels, original_ttl, expiration, inception, key_tag, signer, signature): super(RRSIG, self).__init__(rdclass, rdtype) self.type_covered = type_covered self.algorithm = algorithm self.labels = labels self.original_ttl = original_ttl self.expiration = expiration self.inception = inception self.key_tag = key_tag self.signer = signer self.signature = signature def covers(self): return self.type_covered def to_text(self, origin=None, relativize=True, **kw): return '%s %d %d %d %s %s %d %s %s' % ( dns.rdatatype.to_text(self.type_covered), self.algorithm, self.labels, self.original_ttl, posixtime_to_sigtime(self.expiration), posixtime_to_sigtime(self.inception), self.key_tag, self.signer.choose_relativity(origin, relativize), dns.rdata._base64ify(self.signature) ) @classmethod def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True): type_covered = dns.rdatatype.from_text(tok.get_string()) algorithm = dns.dnssec.algorithm_from_text(tok.get_string()) labels = tok.get_int() original_ttl = tok.get_ttl() expiration = sigtime_to_posixtime(tok.get_string()) inception = sigtime_to_posixtime(tok.get_string()) key_tag = tok.get_int() signer = tok.get_name() signer = signer.choose_relativity(origin, relativize) chunks = [] while 1: t = tok.get().unescape() if t.is_eol_or_eof(): break if not t.is_identifier(): raise dns.exception.SyntaxError chunks.append(t.value.encode()) b64 = b''.join(chunks) signature = base64.b64decode(b64) return cls(rdclass, rdtype, type_covered, algorithm, labels, original_ttl, expiration, inception, key_tag, signer, signature) def to_wire(self, file, compress=None, origin=None): header = struct.pack('!HBBIIIH', self.type_covered, self.algorithm, self.labels, self.original_ttl, self.expiration, self.inception, self.key_tag) file.write(header) self.signer.to_wire(file, None, origin) file.write(self.signature) @classmethod def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None): header = struct.unpack('!HBBIIIH', wire[current: current + 18]) current += 18 rdlen -= 18 (signer, cused) = dns.name.from_wire(wire[: current + rdlen], current) current += cused rdlen -= cused if origin is not None: signer = signer.relativize(origin) signature = wire[current: current + rdlen].unwrap() return cls(rdclass, rdtype, header[0], header[1], header[2], header[3], header[4], header[5], header[6], signer, signature) def choose_relativity(self, origin=None, relativize=True): self.signer = self.signer.choose_relativity(origin, relativize)
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