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# $Id$
# Copyright (C) 2007--2008 American Registry for Internet Numbers ("ARIN")
#
# Permission to use, copy, modify, and distribute this software 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 ARIN DISCLAIMS ALL WARRANTIES WITH
# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS. IN NO EVENT SHALL ARIN 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.
""" ROA (Route Origin Authorization).
At the moment this is just the ASN.1 encoder.
This corresponds to draft-ietf-sidr-roa-format, which is a work in
progress, so this may need updating later.
"""
from POW._der import *
# draft-ietf-sidr-roa-format-02 2.1.3.2 specifies:
#
# RouteOriginAttestation ::= SEQUENCE {
# version [0] INTEGER DEFAULT 0,
# asID ASID,
# exactMatch BOOLEAN,
# ipAddrBlocks ROAIPAddrBlocks }
#
# ASID ::= INTEGER
#
# ROAIPAddrBlocks ::= SEQUENCE of ROAIPAddressFamily
#
# ROAIPAddressFamily ::= SEQUENCE {
# addressFamily OCTET STRING (SIZE (2..3)),
# addresses SEQUENCE OF IPAddress }
#
# IPAddress ::= BIT STRING
#
# ... but we now implement the new format that will supposedly appear
# in the upcoming draft-ietf-sidr-roa-format-03:
#
# RouteOriginAttestation ::= SEQUENCE {
# version [0] INTEGER DEFAULT 0,
# asID ASID,
# ipAddrBlocks SEQUENCE OF ROAIPAddressFamily }
#
# ASID ::= INTEGER
#
# ROAIPAddressFamily ::= SEQUENCE {
# addressFamily OCTET STRING (SIZE (2..3)),
# addresses SEQUENCE OF ROAIPAddress }
#
# ROAIPAddress ::= {
# address IPAddress,
# maxLength INTEGER OPTIONAL }
#
# IPAddress ::= BIT STRING
class ROAIPAddress(Sequence):
def __init__(self, optional=0, default=''):
self.address = BitString()
self.maxLength = Integer(1)
contents = [ self.address, self.maxLength ]
Sequence.__init__(self, contents, optional, default)
class ROAIPAddresses(SequenceOf):
def __init__(self, optional=0, default=''):
SequenceOf.__init__(self, ROAIPAddress, optional, default)
class ROAIPAddressFamily(Sequence):
def __init__(self, optional=0, default=''):
self.addressFamily = OctetString()
self.addresses = ROAIPAddresses()
contents = [ self.addressFamily, self.addresses ]
Sequence.__init__(self, contents, optional, default)
class ROAIPAddressFamilies(SequenceOf):
def __init__(self, optional=0, default=''):
SequenceOf.__init__(self, ROAIPAddressFamily, optional, default)
class RouteOriginAttestation(Sequence):
def __init__(self, optional=0, default=''):
self.version = Integer()
self.explicitVersion = Explicit(CLASS_CONTEXT, FORM_CONSTRUCTED, 0, self.version, 0, 'oAMCAQA=')
self.asID = Integer()
self.ipAddrBlocks = ROAIPAddressFamilies()
contents = [ self.explicitVersion, self.asID, self.ipAddrBlocks ]
Sequence.__init__(self, contents, optional, default)
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