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#!/usr/bin/env python
# $Id$
"""
Reimplementation of rcynic in Python. Work in progress.
Well, OK, at the moment this doesn't even come close to being a
replacement for the C version of rcynic, must less adding the new
features that were the reason for bothering with all this. Right now,
this is just a test framework for the new POW.c code to support Python
RP code. Gotta start somewhere.
"""
import os
import sys
import time
import argparse
import rpki.POW
from lxml.etree import ElementTree, Element, SubElement, Comment
class Status(object):
"""
Validation status database, like validation_status_t in rcynic:tos.
"""
db = dict()
def __init__(self, uri, generation = None):
assert generation in ("current", "backup", None)
self.uri = uri
self.generation = generation
self.timestamp = None
self.status = set()
def __str__(self):
return "{time} {self.uri} {status} {self.generation}".format(
self = self,
time = time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime(self.timestamp)),
status = ",".join(s.name for s in sorted(self.status)))
@classmethod
def update(cls, uri, generation = None):
try:
key = (uri, generation)
self = cls.db[key]
except KeyError:
self = cls.db[key] = cls(uri, generation)
self.timestamp = time.time()
return self.status
def parse_arguments():
def check_dir(s):
if not os.path.isdir(s):
raise argparse.ArgumentTypeError("%r is not a directory" % s)
return s
parser = argparse.ArgumentParser(description = __doc__)
parser.add_argument("--unauthenticated", type = check_dir, default = "rcynic-data/unauthenticated")
parser.add_argument("--old-authenticated", type = check_dir, default = "rcynic-data/authenticated.old")
parser.add_argument("--tals", type = check_dir, default = "sample-trust-anchors")
parser.add_argument("--output", default = "rcynic-data/rcynicng-output")
return parser.parse_args()
def read_tals():
for root, dirs, files in os.walk(args.tals):
for fn in files:
if fn.endswith(".tal"):
furi = "file://" + os.path.abspath(os.path.join(root, fn))
try:
with open(os.path.join(root, fn), "r") as f:
lines = f.readlines()
uri = lines.pop(0).strip()
b64 = "".join(lines[lines.index("\n"):])
key = rpki.POW.Asymmetric.derReadPublic(b64.decode("base64"))
if not uri.endswith(".cer"):
Status.update(furi).add(rpki.POW.validation_status.MALFORMED_TAL_URI)
yield uri, key
except:
Status.update(furi).add(rpki.POW.validation_status.UNREADABLE_TRUST_ANCHOR_LOCATOR)
def uri_to_filename(uri, base = None):
fn = uri[uri.index("://")+3:]
if base is not None:
fn = os.path.join(base, fn)
return fn
def uri_to_basename(uri):
return uri.rpartition("/")[2]
def first_uri(uris, scheme):
for uri in uris:
if uri.startswith(scheme):
return uri
return None
def first_rsync_uri(uris):
return first_uri(uris, "rsync://")
def sha256(bytes):
d = rpki.POW.Digest(rpki.POW.SHA256_DIGEST)
d.update(bytes)
return d.digest()
def walk_tree(cauri, ca, trusted, crl, basedir):
trusted.insert(0, ca)
sia = ca.getSIA()
diruri = first_rsync_uri(sia[0])
mfturi = first_rsync_uri(sia[1])
try:
mft = rpki.POW.Manifest.derReadFile(uri_to_filename(mfturi, basedir))
except rpki.POW.Error as e:
print mfturi, e
return
ee = mft.certs()[0]
crldp = ee.getCRLDP()
crluri = first_rsync_uri(crldp)
try:
crl = rpki.POW.CRL.derReadFile(uri_to_filename(crluri, basedir))
except rpki.POW.Error as e:
print crluri, e
return
crl_status = Status.update(crluri)
crl.verify(ca, crl_status)
mft_status = Status.update(mfturi)
ee.verify(trusted = trusted, crl = crl, status = mft_status)
mft.verify(status = mft_status)
crl_status.add(rpki.POW.validation_status.CRL_NOT_IN_MANIFEST)
for fn, digest in mft.getFiles():
uri = diruri + fn
status = Status.update(uri)
if uri == crluri:
if digest != sha256(crl.derWrite()):
status.add(rpki.POW.validation_status.DIGEST_MISMATCH)
status.remove(rpki.POW.validation_status.CRL_NOT_IN_MANIFEST)
continue
with open(os.path.join(uri_to_filename(diruri, basedir), fn), "rb") as f:
der = f.read()
if sha256(der) != digest:
status.add(rpki.POW.validation_status.DIGEST_MISMATCH)
if fn.endswith(".roa"):
roa = rpki.POW.ROA.derRead(der)
ee = roa.certs()[0]
ee.verify(trusted = trusted, crl = crl, status = status)
roa.verify(status = status)
continue
if fn.endswith(".gbr"):
gbr = rpki.POW.CMS.derRead(der)
ee = gbr.certs()[0]
ee.verify(trusted = trusted, crl = crl, status = status)
vcard = gbr.verify(status = status)
continue
if fn.endswith(".cer"):
cer = rpki.POW.X509.derRead(der)
cer.verify(trusted = trusted, crl = crl, status = status)
is_ca = (cer.getBasicConstraints() or (False, None))[0]
if is_ca:
walk_tree(diruri + fn, cer, trusted, crl, basedir)
continue
status.add(rpki.POW.validation_status.UNKNOWN_OBJECT_TYPE_SKIPPED)
os.putenv("TZ", "UTC")
time.tzset()
args = parse_arguments()
basedir = args.unauthenticated
for uri, key in read_tals():
status = Status.update(uri)
status.add(rpki.POW.validation_status.OBJECT_REJECTED)
try:
cer = rpki.POW.X509.derReadFile(uri_to_filename(uri, basedir))
except rpki.POW.OpenSSLError:
status.add(rpki.POW.validation_status.UNREADABLE_TRUST_ANCHOR)
continue
if key.derWritePublic() != cer.getPublicKey().derWritePublic():
status.add(rpki.POW.validation_status.TRUST_ANCHOR_KEY_MISMATCH)
continue
trusted = [cer]
try:
cer.verify(trusted = trusted, status = status)
except:
continue
else:
status.remove(rpki.POW.validation_status.OBJECT_REJECTED)
walk_tree(uri, cer, trusted, None, basedir)
for uri in sorted(Status.db):
print Status.db[uri]
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