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#!/usr/bin/env python
#
# $Id$
#
# Copyright (C) 2014 Dragon Research Labs ("DRL")
#
# Permission to use, copy, modify, and/or 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 DRL DISCLAIMS ALL WARRANTIES WITH
# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS. IN NO EVENT SHALL DRL 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.
"""
Searches authenticated result tree from an rcynic run for ROAs
matching specified prefixes.
"""
import os
import argparse
import rpki.POW
import rpki.oids
def check_dir(s):
if os.path.isdir(s):
return os.path.abspath(s)
else:
raise argparse.ArgumentTypeError("%r is not a directory" % s)
def filename_to_uri(filename):
if not filename.startswith(args.rcynic_dir):
raise ValueError
return "rsync://" + filename[len(args.rcynic_dir):].lstrip("/")
def uri_to_filename(uri):
if not uri.startswith("rsync://"):
raise ValueError
return os.path.join(args.rcynic_dir, uri[len("rsync://"):])
class Prefix(object):
"""
One prefix parsed from the command line.
"""
def __init__(self, val):
addr, length = val.split("/")
length, sep, maxlength = length.partition("-") # pylint: disable=W0612
self.prefix = rpki.POW.IPAddress(addr)
self.length = int(length)
self.maxlength = int(maxlength) if maxlength else self.length
if self.maxlength < self.length or self.length < 0 or self.length > self.prefix.bits:
raise ValueError
if self.prefix & ((1 << (self.prefix.bits - self.length)) - 1) != 0:
raise ValueError
def matches(self, roa): # pylint: disable=W0621
return any(self.prefix == prefix and
self.length == length and
(not args.match_maxlength or
self.maxlength == maxlength or
(maxlength is None and
self.length == self.maxlength))
for prefix, length, maxlength in roa.prefixes)
class ROA(rpki.POW.ROA): # pylint: disable=W0232
"""
Aspects of a ROA that we care about.
"""
@classmethod
def parse(cls, fn): # pylint: disable=W0621
assert fn.startswith(args.rcynic_dir)
self = cls.derReadFile(fn)
self.fn = fn
self.extractWithoutVerifying()
v4, v6 = self.getPrefixes()
self.prefixes = (v4 or ()) + (v6 or ())
return self
@property
def uri(self):
return filename_to_uri(self.fn)
@property
def formatted_prefixes(self):
for prefix in self.prefixes:
if prefix[2] is None or prefix[1] == prefix[2]:
yield "%s/%d" % (prefix[0], prefix[1])
else:
yield "%s/%d-%d" % (prefix[0], prefix[1], prefix[2])
def __str__(self):
prefixes = " ".join(self.formatted_prefixes)
plural = "es" if " " in prefixes else ""
if args.show_inception:
return "signingTime %s ASN %s prefix%s %s" % (self.signingTime(), self.getASID(), plural, prefixes)
else:
return "ASN %s prefix%s %s" % (self.getASID(), plural, prefixes)
def show(self):
print "%s %s" % (self, self.fn if args.show_filenames else self.uri)
def show_expiration(self):
print self
x = self.certs()[0]
fn = self.fn # pylint: disable=W0621
uri = self.uri
while uri is not None:
name = fn if args.show_filenames else uri
if args.show_inception:
print "notBefore", x.getNotBefore(), "notAfter", x.getNotAfter(), name
else:
print x.getNotAfter(), name
for uri in x.getAIA() or ():
if uri.startswith("rsync://"):
break
else:
break
fn = uri_to_filename(uri)
if not os.path.exists(fn):
print "***** MISSING ******", uri
break
x = rpki.POW.X509.derReadFile(fn)
print
parser = argparse.ArgumentParser(description = __doc__)
parser.add_argument("-a", "--all", action = "store_true", help = "show all ROAs, do no prefix matching at all")
parser.add_argument("-m", "--match-maxlength", action = "store_true", help = "pay attention to maxLength values")
parser.add_argument("-e", "--show-expiration", action = "store_true", help = "show ROA chain expiration dates")
parser.add_argument("-f", "--show-filenames", action = "store_true", help = "show filenames instead of URIs")
parser.add_argument("-i", "--show-inception", action = "store_true", help = "show inception dates")
parser.add_argument("rcynic_dir", type = check_dir, help = "rcynic authenticated output directory")
parser.add_argument("prefixes", type = Prefix, nargs = "*", help = "ROA prefix(es) to match")
args = parser.parse_args()
# If there's some way to automate this in the parser, I don't know what it is, so just catch it here.
if args.all != (not args.prefixes):
parser.error("--all and prefix list are mutually exclusive")
for root, dirs, files in os.walk(args.rcynic_dir):
for fn in files:
if fn.endswith(".roa"):
roa = ROA.parse(os.path.join(root, fn))
if args.all or any(prefix.matches(roa) for prefix in args.prefixes):
if args.show_expiration:
roa.show_expiration()
else:
roa.show()
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