diff options
Diffstat (limited to 'rpkid.with_tls/rpki/rpki_engine.py')
| -rw-r--r-- | rpkid.with_tls/rpki/rpki_engine.py | 1447 |
1 files changed, 1447 insertions, 0 deletions
diff --git a/rpkid.with_tls/rpki/rpki_engine.py b/rpkid.with_tls/rpki/rpki_engine.py new file mode 100644 index 00000000..46523814 --- /dev/null +++ b/rpkid.with_tls/rpki/rpki_engine.py @@ -0,0 +1,1447 @@ +""" +Global context for rpkid. + +$Id$ + +Copyright (C) 2009-2010 Internet Systems Consortium ("ISC") + +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 ISC DISCLAIMS ALL WARRANTIES WITH +REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY +AND FITNESS. IN NO EVENT SHALL ISC 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. + +Portions 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. +""" + +import lxml.etree, re, random +import rpki.resource_set, rpki.up_down, rpki.left_right, rpki.x509, rpki.sql +import rpki.https, rpki.config, rpki.exceptions, rpki.relaxng, rpki.log, rpki.async + +class rpkid_context(object): + """ + A container for various global rpkid parameters. + """ + + def __init__(self, cfg): + + self.sql = rpki.sql.session(cfg) + + self.bpki_ta = rpki.x509.X509(Auto_update = cfg.get("bpki-ta")) + self.irdb_cert = rpki.x509.X509(Auto_update = cfg.get("irdb-cert")) + self.irbe_cert = rpki.x509.X509(Auto_update = cfg.get("irbe-cert")) + self.rpkid_cert = rpki.x509.X509(Auto_update = cfg.get("rpkid-cert")) + self.rpkid_key = rpki.x509.RSA( Auto_update = cfg.get("rpkid-key")) + + self.irdb_url = cfg.get("irdb-url") + + self.https_server_host = cfg.get("server-host", "") + self.https_server_port = cfg.getint("server-port", 4433) + + self.publication_kludge_base = cfg.get("publication-kludge-base", "publication/") + + self.use_internal_cron = cfg.getboolean("use-internal-cron", True) + + self.initial_delay = random.randint(cfg.getint("initial-delay-min", 10), + cfg.getint("initial-delay-max", 120)) + + # Should be much longer in production + self.cron_period = rpki.sundial.timedelta(seconds = cfg.getint("cron-period", 120)) + self.cron_keepalive = rpki.sundial.timedelta(seconds = cfg.getint("cron-keepalive", 0)) + if not self.cron_keepalive: + self.cron_keepalive = self.cron_period * 4 + self.cron_timeout = None + + def start_cron(self): + """ + Start clock for rpkid's internal cron process. + """ + + if self.use_internal_cron: + self.cron_timer = rpki.async.timer(handler = self.cron) + when = rpki.sundial.now() + rpki.sundial.timedelta(seconds = self.initial_delay) + rpki.log.debug("Scheduling initial cron pass at %s" % when) + self.cron_timer.set(when) + else: + rpki.log.debug("Not using internal clock, start_cron() call ignored") + + def irdb_query(self, q_pdu, callback, errback, expected_pdu_count = None): + """ + Perform an IRDB callback query. + """ + + rpki.log.trace() + + q_msg = rpki.left_right.msg.query() + q_msg.append(q_pdu) + q_der = rpki.left_right.cms_msg().wrap(q_msg, self.rpkid_key, self.rpkid_cert) + + def unwrap(r_der): + r_cms = rpki.left_right.cms_msg(DER = r_der) + r_msg = r_cms.unwrap((self.bpki_ta, self.irdb_cert)) + if not r_msg.is_reply() or not all(type(r_pdu) is type(q_pdu) for r_pdu in r_msg): + raise rpki.exceptions.BadIRDBReply, "Unexpected response to IRDB query: %s" % r_cms.pretty_print_content() + if expected_pdu_count is not None and len(r_msg) != expected_pdu_count: + assert isinstance(expected_pdu_count, (int, long)) + raise rpki.exceptions.BadIRDBReply, "Expected exactly %d PDU%s from IRDB: %s" ( + expected_pdu_count, "" if expected_pdu_count == 1 else "s", r_cms.pretty_print_content()) + callback(r_msg) + + rpki.https.client( + server_ta = (self.bpki_ta, self.irdb_cert), + client_key = self.rpkid_key, + client_cert = self.rpkid_cert, + url = self.irdb_url, + msg = q_der, + callback = unwrap, + errback = errback) + + def irdb_query_child_resources(self, self_handle, child_handle, callback, errback): + """ + Ask IRDB about a child's resources. + """ + + rpki.log.trace() + + q_pdu = rpki.left_right.list_resources_elt() + q_pdu.self_handle = self_handle + q_pdu.child_handle = child_handle + + def done(r_msg): + callback(rpki.resource_set.resource_bag( + asn = r_msg[0].asn, + v4 = r_msg[0].ipv4, + v6 = r_msg[0].ipv6, + valid_until = r_msg[0].valid_until)) + + self.irdb_query(q_pdu, done, errback, expected_pdu_count = 1) + + def irdb_query_roa_requests(self, self_handle, callback, errback): + """ + Ask IRDB about self's ROA requests. + """ + + rpki.log.trace() + + q_pdu = rpki.left_right.list_roa_requests_elt() + q_pdu.self_handle = self_handle + + self.irdb_query(q_pdu, callback, errback) + + def left_right_handler(self, query, path, cb): + """ + Process one left-right PDU. + """ + + rpki.log.trace() + + def done(r_msg): + reply = rpki.left_right.cms_msg().wrap(r_msg, self.rpkid_key, self.rpkid_cert) + self.sql.sweep() + cb(200, reply) + + try: + self.sql.ping() + q_msg = rpki.left_right.cms_msg(DER = query).unwrap((self.bpki_ta, self.irbe_cert)) + if not q_msg.is_query(): + raise rpki.exceptions.BadQuery, "Message type is not query" + q_msg.serve_top_level(self, done) + except (rpki.async.ExitNow, SystemExit): + raise + except Exception, data: + rpki.log.traceback() + cb(500, "Unhandled exception %s" % data) + + up_down_url_regexp = re.compile("/up-down/([-A-Z0-9_]+)/([-A-Z0-9_]+)$", re.I) + + def up_down_handler(self, query, path, cb): + """ + Process one up-down PDU. + """ + + rpki.log.trace() + + def done(reply): + self.sql.sweep() + cb(200, reply) + + try: + self.sql.ping() + match = self.up_down_url_regexp.search(path) + if match is None: + raise rpki.exceptions.BadContactURL, "Bad path: %s" % path + self_handle, child_handle = match.groups() + child = rpki.left_right.child_elt.sql_fetch_where1(self, "self.self_handle = %s AND child.child_handle = %s AND child.self_id = self.self_id", + (self_handle, child_handle), "self") + if child is None: + raise rpki.exceptions.ChildNotFound, "Could not find child %s" % child_handle + child.serve_up_down(query, done) + except (rpki.async.ExitNow, SystemExit): + raise + except Exception, data: + rpki.log.traceback() + cb(400, "Could not process PDU: %s" % data) + + def checkpoint(self): + """ + Record that we were still alive when we got here, by resetting + keepalive timer. + """ + self.cron_timeout = rpki.sundial.now() + self.cron_keepalive + + def cron(self, cb = None): + """ + Periodic tasks. + """ + + rpki.log.trace() + self.sql.ping() + + now = rpki.sundial.now() + + assert self.use_internal_cron or self.cron_timeout is None + + if self.use_internal_cron: + + if self.cron_timeout and self.cron_timeout < now: + rpki.log.warn("cron keepalive threshold %s has expired, breaking lock" % self.cron_timeout) + self.cron_timeout = None + + when = now + self.cron_period + rpki.log.debug("Scheduling next cron run at %s" % when) + self.cron_timer.set(when) + + if self.cron_timeout: + rpki.log.warn("cron already running, keepalive will expire at %s" % self.cron_timeout) + return + + self.checkpoint() + + def loop(iterator, s): + self.checkpoint() + s.cron(iterator) + + def done(): + self.sql.sweep() + self.cron_timeout = None + rpki.log.info("Finished cron run started at %s" % now) + if not self.use_internal_cron: + cb() + + def lose(e): + self.cron_timeout = None + if self.use_internal_cron: + rpki.log.traceback() + else: + raise + + try: + rpki.async.iterator(rpki.left_right.self_elt.sql_fetch_all(self), loop, done) + + except (rpki.async.ExitNow, SystemExit): + self.cron_timeout = None + raise + + except Exception, e: + lose(e) + + def cronjob_handler(self, query, path, cb): + """ + External trigger for periodic tasks. This is somewhat obsolete + now that we have internal timers, but the test framework still + uses it. + """ + + if self.use_internal_cron: + cb(500, "Running cron internally") + else: + self.cron(lambda: cb(200, "OK")) + + ## @var https_ta_cache + # HTTPS trust anchor cache, to avoid regenerating it for every TLS connection. + https_ta_cache = None + + def clear_https_ta_cache(self): + """ + Clear dynamic TLS trust anchors. + """ + + if self.https_ta_cache is not None: + rpki.log.debug("Clearing HTTPS trusted cert cache") + self.https_ta_cache = None + + def build_https_ta_cache(self): + """ + Build dynamic TLS trust anchors. + """ + + if self.https_ta_cache is None: + + selves = rpki.left_right.self_elt.sql_fetch_all(self) + children = rpki.left_right.child_elt.sql_fetch_all(self) + + self.https_ta_cache = rpki.https.build_https_ta_cache( + [c.bpki_cert for c in children if c.bpki_cert is not None] + + [c.bpki_glue for c in children if c.bpki_glue is not None] + + [s.bpki_cert for s in selves if s.bpki_cert is not None] + + [s.bpki_glue for s in selves if s.bpki_glue is not None] + + [self.irbe_cert, self.irdb_cert, self.bpki_ta]) + + return self.https_ta_cache + + +class ca_obj(rpki.sql.sql_persistent): + """ + Internal CA object. + """ + + sql_template = rpki.sql.template( + "ca", + "ca_id", + "last_crl_sn", + ("next_crl_update", rpki.sundial.datetime), + "last_issued_sn", "last_manifest_sn", + ("next_manifest_update", rpki.sundial.datetime), + "sia_uri", "parent_id", "parent_resource_class") + + last_crl_sn = 0 + last_issued_sn = 0 + last_manifest_sn = 0 + + def parent(self): + """Fetch parent object to which this CA object links.""" + return rpki.left_right.parent_elt.sql_fetch(self.gctx, self.parent_id) + + def ca_details(self): + """Fetch all ca_detail objects that link to this CA object.""" + return ca_detail_obj.sql_fetch_where(self.gctx, "ca_id = %s", (self.ca_id,)) + + def fetch_pending(self): + """Fetch the pending ca_details for this CA, if any.""" + return ca_detail_obj.sql_fetch_where(self.gctx, "ca_id = %s AND state = 'pending'", (self.ca_id,)) + + def fetch_active(self): + """Fetch the active ca_detail for this CA, if any.""" + return ca_detail_obj.sql_fetch_where1(self.gctx, "ca_id = %s AND state = 'active'", (self.ca_id,)) + + def fetch_deprecated(self): + """Fetch deprecated ca_details for this CA, if any.""" + return ca_detail_obj.sql_fetch_where(self.gctx, "ca_id = %s AND state = 'deprecated'", (self.ca_id,)) + + def fetch_revoked(self): + """Fetch revoked ca_details for this CA, if any.""" + return ca_detail_obj.sql_fetch_where(self.gctx, "ca_id = %s AND state = 'revoked'", (self.ca_id,)) + + def fetch_issue_response_candidates(self): + """ + Fetch ca_details which are candidates for consideration when + processing an up-down issue_response PDU. + """ + #return ca_detail_obj.sql_fetch_where(self.gctx, "ca_id = %s AND latest_ca_cert IS NOT NULL AND state != 'revoked'", (self.ca_id,)) + return ca_detail_obj.sql_fetch_where(self.gctx, "ca_id = %s AND state != 'revoked'", (self.ca_id,)) + + def construct_sia_uri(self, parent, rc): + """ + Construct the sia_uri value for this CA given configured + information and the parent's up-down protocol list_response PDU. + """ + + sia_uri = rc.suggested_sia_head and rc.suggested_sia_head.rsync() + if not sia_uri or not sia_uri.startswith(parent.sia_base): + sia_uri = parent.sia_base + if not sia_uri.endswith("/"): + raise rpki.exceptions.BadURISyntax, "SIA URI must end with a slash: %s" % sia_uri + return sia_uri + str(self.ca_id) + "/" + + def check_for_updates(self, parent, rc, cb, eb): + """ + Parent has signaled continued existance of a resource class we + already knew about, so we need to check for an updated + certificate, changes in resource coverage, revocation and reissue + with the same key, etc. + """ + + sia_uri = self.construct_sia_uri(parent, rc) + sia_uri_changed = self.sia_uri != sia_uri + if sia_uri_changed: + self.sia_uri = sia_uri + self.sql_mark_dirty() + + rc_resources = rc.to_resource_bag() + cert_map = dict((c.cert.get_SKI(), c) for c in rc.certs) + + def loop(iterator, ca_detail): + + self.gctx.checkpoint() + + rc_cert = cert_map.pop(ca_detail.public_key.get_SKI(), None) + + if rc_cert is None: + + rpki.log.warn("Certificate in database missing from list_response, class %r, SKI %s, maybe parent certificate went away?" + % (rc.class_name, ca_detail.public_key.gSKI())) + publisher = publication_queue() + ca_detail.delete(ca = ca_detail.ca(), publisher = publisher) + return publisher.call_pubd(iterator, eb) + + else: + + if ca_detail.state in ("pending", "active"): + + if ca_detail.state == "pending": + current_resources = rpki.resource_set.resource_bag() + else: + current_resources = ca_detail.latest_ca_cert.get_3779resources() + + if (ca_detail.state == "pending" or + sia_uri_changed or + ca_detail.latest_ca_cert != rc_cert.cert or + current_resources.undersized(rc_resources) or + current_resources.oversized(rc_resources)): + return ca_detail.update( + parent = parent, + ca = self, + rc = rc, + sia_uri_changed = sia_uri_changed, + old_resources = current_resources, + callback = iterator, + errback = eb) + + iterator() + + def done(): + if cert_map: + rpki.log.warn("Certificates in list_response missing from our database, class %r, SKIs %s" + % (rc.class_name, ", ".join(c.cert.gSKI() for c in cert_map.values()))) + self.gctx.checkpoint() + cb() + + ca_details = self.fetch_issue_response_candidates() + + if True: + for x in cert_map.itervalues(): + rpki.log.debug("Parent thinks I have %r %s" % (x, x.cert.gSKI())) + for x in ca_details: + if x.latest_ca_cert is not None: + rpki.log.debug("I think I have %r %s" % (x, x.latest_ca_cert.gSKI())) + + if ca_details: + rpki.async.iterator(ca_details, loop, done) + else: + rpki.log.warn("Existing certificate class %r with no certificates, rekeying" % rc.class_name) + self.gctx.checkpoint() + self.rekey(cb, eb) + + @classmethod + def create(cls, parent, rc, cb, eb): + """ + Parent has signaled existance of a new resource class, so we need + to create and set up a corresponding CA object. + """ + + self = cls() + self.gctx = parent.gctx + self.parent_id = parent.parent_id + self.parent_resource_class = rc.class_name + self.sql_store() + self.sia_uri = self.construct_sia_uri(parent, rc) + ca_detail = ca_detail_obj.create(self) + + def done(issue_response): + ca_detail.activate( + ca = self, + cert = issue_response.payload.classes[0].certs[0].cert, + uri = issue_response.payload.classes[0].certs[0].cert_url, + callback = cb, + errback = eb) + + rpki.up_down.issue_pdu.query(parent, self, ca_detail, done, eb) + + def delete(self, parent, callback): + """ + The list of current resource classes received from parent does not + include the class corresponding to this CA, so we need to delete + it (and its little dog too...). + + All certs published by this CA are now invalid, so need to + withdraw them, the CRL, and the manifest from the repository, + delete all child_cert and ca_detail records associated with this + CA, then finally delete this CA itself. + """ + + def lose(e): + rpki.log.traceback() + rpki.log.warn("Could not delete CA %r, skipping: %s" % (self, e)) + callback() + + def done(): + self.sql_delete() + callback() + + publisher = publication_queue() + for ca_detail in self.ca_details(): + ca_detail.delete(ca = self, publisher = publisher) + publisher.call_pubd(done, lose) + + def next_serial_number(self): + """ + Allocate a certificate serial number. + """ + self.last_issued_sn += 1 + self.sql_mark_dirty() + return self.last_issued_sn + + def next_manifest_number(self): + """ + Allocate a manifest serial number. + """ + self.last_manifest_sn += 1 + self.sql_mark_dirty() + return self.last_manifest_sn + + def next_crl_number(self): + """ + Allocate a CRL serial number. + """ + self.last_crl_sn += 1 + self.sql_mark_dirty() + return self.last_crl_sn + + def rekey(self, cb, eb): + """ + Initiate a rekey operation for this ca. Generate a new keypair. + Request cert from parent using new keypair. Mark result as our + active ca_detail. Reissue all child certs issued by this ca using + the new ca_detail. + """ + + rpki.log.trace() + + parent = self.parent() + old_detail = self.fetch_active() + new_detail = ca_detail_obj.create(self) + + def done(issue_response): + new_detail.activate( + ca = self, + cert = issue_response.payload.classes[0].certs[0].cert, + uri = issue_response.payload.classes[0].certs[0].cert_url, + predecessor = old_detail, + callback = cb, + errback = eb) + + rpki.up_down.issue_pdu.query(parent, self, new_detail, done, eb) + + def revoke(self, cb, eb): + """ + Revoke deprecated ca_detail objects associated with this ca. + """ + + rpki.log.trace() + + def loop(iterator, ca_detail): + ca_detail.revoke(cb = iterator, eb = eb) + + rpki.async.iterator(self.fetch_deprecated(), loop, cb) + +class ca_detail_obj(rpki.sql.sql_persistent): + """ + Internal CA detail object. + """ + + sql_template = rpki.sql.template( + "ca_detail", + "ca_detail_id", + ("private_key_id", rpki.x509.RSA), + ("public_key", rpki.x509.RSApublic), + ("latest_ca_cert", rpki.x509.X509), + ("manifest_private_key_id", rpki.x509.RSA), + ("manifest_public_key", rpki.x509.RSApublic), + ("latest_manifest_cert", rpki.x509.X509), + ("latest_manifest", rpki.x509.SignedManifest), + ("latest_crl", rpki.x509.CRL), + ("crl_published", rpki.sundial.datetime), + ("manifest_published", rpki.sundial.datetime), + "state", + "ca_cert_uri", + "ca_id") + + crl_published = None + manifest_published = None + latest_ca_cert = None + + def sql_decode(self, vals): + """ + Extra assertions for SQL decode of a ca_detail_obj. + """ + rpki.sql.sql_persistent.sql_decode(self, vals) + assert self.public_key is None or self.private_key_id is None or self.public_key.get_DER() == self.private_key_id.get_public_DER() + assert self.manifest_public_key is None or self.manifest_private_key_id is None or self.manifest_public_key.get_DER() == self.manifest_private_key_id.get_public_DER() + + def ca(self): + """Fetch CA object to which this ca_detail links.""" + return ca_obj.sql_fetch(self.gctx, self.ca_id) + + def child_certs(self, child = None, ski = None, unique = False): + """Fetch all child_cert objects that link to this ca_detail.""" + return rpki.rpki_engine.child_cert_obj.fetch(self.gctx, child, self, ski, unique) + + def revoked_certs(self): + """Fetch all revoked_cert objects that link to this ca_detail.""" + return revoked_cert_obj.sql_fetch_where(self.gctx, "ca_detail_id = %s", (self.ca_detail_id,)) + + def roas(self): + """Fetch all ROA objects that link to this ca_detail.""" + return rpki.rpki_engine.roa_obj.sql_fetch_where(self.gctx, "ca_detail_id = %s", (self.ca_detail_id,)) + + def crl_uri(self, ca): + """Return publication URI for this ca_detail's CRL.""" + return ca.sia_uri + self.crl_uri_tail() + + def crl_uri_tail(self): + """Return tail (filename portion) of publication URI for this ca_detail's CRL.""" + return self.public_key.gSKI() + ".crl" + + def manifest_uri(self, ca): + """Return publication URI for this ca_detail's manifest.""" + return ca.sia_uri + self.public_key.gSKI() + ".mnf" + + def activate(self, ca, cert, uri, callback, errback, predecessor = None): + """ + Activate this ca_detail. + """ + + publisher = publication_queue() + + self.latest_ca_cert = cert + self.ca_cert_uri = uri.rsync() + self.generate_manifest_cert(ca) + self.state = "active" + self.generate_crl(publisher = publisher) + self.generate_manifest(publisher = publisher) + self.sql_mark_dirty() + + if predecessor is not None: + predecessor.state = "deprecated" + predecessor.sql_mark_dirty() + for child_cert in predecessor.child_certs(): + child_cert.reissue(ca_detail = self, publisher = publisher) + for roa in predecessor.roas(): + roa.regenerate(publisher = publisher) + + publisher.call_pubd(callback, errback) + + def delete(self, ca, publisher, allow_failure = False): + """ + Delete this ca_detail and all of the certs it issued. + + If allow_failure is true, we clean up as much as we can but don't + raise an exception. + """ + + repository = ca.parent().repository() + for child_cert in self.child_certs(): + publisher.withdraw(cls = rpki.publication.certificate_elt, uri = child_cert.uri(ca), obj = child_cert.cert, repository = repository, + handler = False if allow_failure else None) + for roa in self.roas(): + roa.revoke(publisher = publisher, allow_failure = allow_failure) + try: + latest_manifest = self.latest_manifest + except AttributeError: + latest_manifest = None + if latest_manifest is not None: + publisher.withdraw(cls = rpki.publication.manifest_elt, uri = self.manifest_uri(ca), obj = self.latest_manifest, repository = repository, + handler = False if allow_failure else None) + try: + latest_crl = self.latest_crl + except AttributeError: + latest_crl = None + if latest_crl is not None: + publisher.withdraw(cls = rpki.publication.crl_elt, uri = self.crl_uri(ca), obj = self.latest_crl, repository = repository, + handler = False if allow_failure else None) + for cert in self.child_certs() + self.revoked_certs(): + cert.sql_delete() + self.sql_delete() + + def revoke(self, cb, eb): + """ + Request revocation of all certificates whose SKI matches the key + for this ca_detail. + + Tasks: + + - Request revocation of old keypair by parent. + + - Revoke all child certs issued by the old keypair. + + - Generate a final CRL, signed with the old keypair, listing all + the revoked certs, with a next CRL time after the last cert or + CRL signed by the old keypair will have expired. + + - Generate a corresponding final manifest. + + - Destroy old keypairs. + + - Leave final CRL and manifest in place until their nextupdate + time has passed. + """ + + ca = self.ca() + parent = ca.parent() + + def parent_revoked(r_msg): + + if r_msg.payload.ski != self.latest_ca_cert.gSKI(): + raise rpki.exceptions.SKIMismatch + + crl_interval = rpki.sundial.timedelta(seconds = parent.self().crl_interval) + + nextUpdate = rpki.sundial.now() + + if self.latest_manifest is not None: + try: + self.latest_manifest.get_content() + except rpki.exceptions.CMSContentNotSet: + self.latest_manifest.extract() + nextUpdate = nextUpdate.later(self.latest_manifest.getNextUpdate()) + + if self.latest_crl is not None: + nextUpdate = nextUpdate.later(self.latest_crl.getNextUpdate()) + + publisher = publication_queue() + + for child_cert in self.child_certs(): + nextUpdate = nextUpdate.later(child_cert.cert.getNotAfter()) + child_cert.revoke(publisher = publisher) + + nextUpdate += crl_interval + self.generate_crl(publisher = publisher, nextUpdate = nextUpdate) + self.generate_manifest(publisher = publisher, nextUpdate = nextUpdate) + self.private_key_id = None + self.manifest_private_key_id = None + self.manifest_public_key = None + self.latest_manifest_cert = None + self.state = "revoked" + self.sql_mark_dirty() + publisher.call_pubd(cb, eb) + + rpki.up_down.revoke_pdu.query(ca, self.latest_ca_cert.gSKI(), parent_revoked, eb) + + def update(self, parent, ca, rc, sia_uri_changed, old_resources, callback, errback): + """ + Need to get a new certificate for this ca_detail and perhaps frob + children of this ca_detail. + """ + + def issued(issue_response): + self.latest_ca_cert = issue_response.payload.classes[0].certs[0].cert + new_resources = self.latest_ca_cert.get_3779resources() + publisher = publication_queue() + + if sia_uri_changed or old_resources.oversized(new_resources): + for child_cert in self.child_certs(): + child_resources = child_cert.cert.get_3779resources() + if sia_uri_changed or child_resources.oversized(new_resources): + child_cert.reissue( + ca_detail = self, + resources = child_resources.intersection(new_resources), + publisher = publisher) + + publisher.call_pubd(callback, errback) + + rpki.up_down.issue_pdu.query(parent, ca, self, issued, errback) + + @classmethod + def create(cls, ca): + """ + Create a new ca_detail object for a specified CA. + """ + self = cls() + self.gctx = ca.gctx + self.ca_id = ca.ca_id + self.state = "pending" + + self.private_key_id = rpki.x509.RSA.generate() + self.public_key = self.private_key_id.get_RSApublic() + + self.manifest_private_key_id = rpki.x509.RSA.generate() + self.manifest_public_key = self.manifest_private_key_id.get_RSApublic() + + self.sql_store() + return self + + def issue_ee(self, ca, resources, subject_key, sia = None): + """ + Issue a new EE certificate. + """ + + return self.latest_ca_cert.issue( + keypair = self.private_key_id, + subject_key = subject_key, + serial = ca.next_serial_number(), + sia = sia, + aia = self.ca_cert_uri, + crldp = self.crl_uri(ca), + resources = resources, + notAfter = self.latest_ca_cert.getNotAfter(), + is_ca = False) + + + def generate_manifest_cert(self, ca): + """ + Generate a new manifest certificate for this ca_detail. + """ + + resources = rpki.resource_set.resource_bag( + asn = rpki.resource_set.resource_set_as(rpki.resource_set.inherit_token), + v4 = rpki.resource_set.resource_set_ipv4(rpki.resource_set.inherit_token), + v6 = rpki.resource_set.resource_set_ipv6(rpki.resource_set.inherit_token)) + + self.latest_manifest_cert = self.issue_ee(ca, resources, self.manifest_public_key) + + def issue(self, ca, child, subject_key, sia, resources, publisher, child_cert = None): + """ + Issue a new certificate to a child. Optional child_cert argument + specifies an existing child_cert object to update in place; if not + specified, we create a new one. Returns the child_cert object + containing the newly issued cert. + """ + + assert child_cert is None or (child_cert.child_id == child.child_id and + child_cert.ca_detail_id == self.ca_detail_id) + + cert = self.latest_ca_cert.issue( + keypair = self.private_key_id, + subject_key = subject_key, + serial = ca.next_serial_number(), + aia = self.ca_cert_uri, + crldp = self.crl_uri(ca), + sia = sia, + resources = resources, + notAfter = resources.valid_until) + + if child_cert is None: + child_cert = rpki.rpki_engine.child_cert_obj( + gctx = child.gctx, + child_id = child.child_id, + ca_detail_id = self.ca_detail_id, + cert = cert) + rpki.log.debug("Created new child_cert %r" % child_cert) + else: + child_cert.cert = cert + rpki.log.debug("Reusing existing child_cert %r" % child_cert) + + child_cert.ski = cert.get_SKI() + child_cert.published = rpki.sundial.now() + child_cert.sql_store() + publisher.publish(cls = rpki.publication.certificate_elt, uri = child_cert.uri(ca), obj = child_cert.cert, repository = ca.parent().repository(), + handler = child_cert.published_callback) + self.generate_manifest(publisher = publisher) + return child_cert + + def generate_crl(self, publisher, nextUpdate = None): + """ + Generate a new CRL for this ca_detail. At the moment this is + unconditional, that is, it is up to the caller to decide whether a + new CRL is needed. + """ + + ca = self.ca() + parent = ca.parent() + crl_interval = rpki.sundial.timedelta(seconds = parent.self().crl_interval) + now = rpki.sundial.now() + + if nextUpdate is None: + nextUpdate = now + crl_interval + + certlist = [] + for revoked_cert in self.revoked_certs(): + if now > revoked_cert.expires + crl_interval: + revoked_cert.sql_delete() + else: + certlist.append((revoked_cert.serial, revoked_cert.revoked.toASN1tuple(), ())) + certlist.sort() + + self.latest_crl = rpki.x509.CRL.generate( + keypair = self.private_key_id, + issuer = self.latest_ca_cert, + serial = ca.next_crl_number(), + thisUpdate = now, + nextUpdate = nextUpdate, + revokedCertificates = certlist) + + self.crl_published = rpki.sundial.now() + self.sql_mark_dirty() + publisher.publish(cls = rpki.publication.crl_elt, uri = self.crl_uri(ca), obj = self.latest_crl, repository = parent.repository(), + handler = self.crl_published_callback) + + def crl_published_callback(self, pdu): + """ + Check result of CRL publication. + """ + pdu.raise_if_error() + self.crl_published = None + self.sql_mark_dirty() + + def generate_manifest(self, publisher, nextUpdate = None): + """ + Generate a new manifest for this ca_detail. + """ + + ca = self.ca() + parent = ca.parent() + crl_interval = rpki.sundial.timedelta(seconds = parent.self().crl_interval) + now = rpki.sundial.now() + + if nextUpdate is None: + nextUpdate = now + crl_interval + + if self.latest_manifest_cert is None or self.latest_manifest_cert.getNotAfter() < nextUpdate: + self.generate_manifest_cert(ca) + + objs = [(self.crl_uri_tail(), self.latest_crl)] + objs.extend((c.uri_tail(), c.cert) for c in self.child_certs()) + objs.extend((r.uri_tail(), r.roa) for r in self.roas() if r.roa is not None) + + self.latest_manifest = rpki.x509.SignedManifest.build( + serial = ca.next_manifest_number(), + thisUpdate = now, + nextUpdate = nextUpdate, + names_and_objs = objs, + keypair = self.manifest_private_key_id, + certs = self.latest_manifest_cert) + + + self.manifest_published = rpki.sundial.now() + self.sql_mark_dirty() + publisher.publish(cls = rpki.publication.manifest_elt, uri = self.manifest_uri(ca), obj = self.latest_manifest, repository = parent.repository(), + handler = self.manifest_published_callback) + + def manifest_published_callback(self, pdu): + """ + Check result of manifest publication. + """ + pdu.raise_if_error() + self.manifest_published = None + self.sql_mark_dirty() + + +class child_cert_obj(rpki.sql.sql_persistent): + """ + Certificate that has been issued to a child. + """ + + sql_template = rpki.sql.template( + "child_cert", + "child_cert_id", + ("cert", rpki.x509.X509), + "child_id", + "ca_detail_id", + "ski", + ("published", rpki.sundial.datetime)) + + def __init__(self, gctx = None, child_id = None, ca_detail_id = None, cert = None): + """ + Initialize a child_cert_obj. + """ + rpki.sql.sql_persistent.__init__(self) + self.gctx = gctx + self.child_id = child_id + self.ca_detail_id = ca_detail_id + self.cert = cert + self.published = None + if child_id or ca_detail_id or cert: + self.sql_mark_dirty() + + def child(self): + """Fetch child object to which this child_cert object links.""" + return rpki.left_right.child_elt.sql_fetch(self.gctx, self.child_id) + + def ca_detail(self): + """Fetch ca_detail object to which this child_cert object links.""" + return ca_detail_obj.sql_fetch(self.gctx, self.ca_detail_id) + + def uri_tail(self): + """Return the tail (filename) portion of the URI for this child_cert.""" + return self.cert.gSKI() + ".cer" + + def uri(self, ca): + """Return the publication URI for this child_cert.""" + return ca.sia_uri + self.uri_tail() + + def revoke(self, publisher, generate_crl_and_manifest = False): + """ + Revoke a child cert. + """ + + ca_detail = self.ca_detail() + ca = ca_detail.ca() + rpki.log.debug("Revoking %r %r" % (self, self.uri(ca))) + revoked_cert_obj.revoke(cert = self.cert, ca_detail = ca_detail) + publisher.withdraw(cls = rpki.publication.certificate_elt, uri = self.uri(ca), obj = self.cert, repository = ca.parent().repository()) + self.gctx.sql.sweep() + self.sql_delete() + if generate_crl_and_manifest: + ca_detail.generate_crl(publisher = publisher) + ca_detail.generate_manifest(publisher = publisher) + + def reissue(self, ca_detail, publisher, resources = None, sia = None): + """ + Reissue an existing child cert, reusing the public key. If the + child cert we would generate is identical to the one we already + have, we just return the one we already have. If we have to + revoke the old child cert when generating the new one, we have to + generate a new child_cert_obj, so calling code that needs the + updated child_cert_obj must use the return value from this method. + """ + + ca = ca_detail.ca() + child = self.child() + + old_resources = self.cert.get_3779resources() + old_sia = self.cert.get_SIA() + old_ca_detail = self.ca_detail() + + if resources is None: + resources = old_resources + + if sia is None: + sia = old_sia + + assert resources.valid_until is not None and old_resources.valid_until is not None + + if resources == old_resources and sia == old_sia and ca_detail == old_ca_detail: + rpki.log.debug("No change to %r" % self) + return self + + must_revoke = old_resources.oversized(resources) or old_resources.valid_until > resources.valid_until + new_issuer = ca_detail != old_ca_detail + + rpki.log.debug("Reissuing %r, must_revoke %s, new_issuer %s" % (self, must_revoke, new_issuer)) + + if resources.valid_until != old_resources.valid_until: + rpki.log.debug("Validity changed: %s %s" % ( old_resources.valid_until, resources.valid_until)) + + if must_revoke: + for x in child.child_certs(ca_detail = ca_detail, ski = self.ski): + rpki.log.debug("Revoking child_cert %r" % x) + x.revoke(publisher = publisher) + ca_detail.generate_crl(publisher = publisher) + ca_detail.generate_manifest(publisher = publisher) + + child_cert = ca_detail.issue( + ca = ca, + child = child, + subject_key = self.cert.getPublicKey(), + sia = sia, + resources = resources, + child_cert = None if must_revoke or new_issuer else self, + publisher = publisher) + + rpki.log.debug("New child_cert %r uri %s" % (child_cert, child_cert.uri(ca))) + + return child_cert + + @classmethod + def fetch(cls, gctx = None, child = None, ca_detail = None, ski = None, unique = False): + """ + Fetch all child_cert objects matching a particular set of + parameters. This is a wrapper to consolidate various queries that + would otherwise be inline SQL WHERE expressions. In most cases + code calls this indirectly, through methods in other classes. + """ + + args = [] + where = [] + + if child: + where.append("child_id = %s") + args.append(child.child_id) + + if ca_detail: + where.append("ca_detail_id = %s") + args.append(ca_detail.ca_detail_id) + + if ski: + where.append("ski = %s") + args.append(ski) + + where = " AND ".join(where) + + gctx = gctx or (child and child.gctx) or (ca_detail and ca_detail.gctx) or None + + if unique: + return cls.sql_fetch_where1(gctx, where, args) + else: + return cls.sql_fetch_where(gctx, where, args) + + def published_callback(self, pdu): + """ + Publication callback: check result and mark published. + """ + pdu.raise_if_error() + self.published = None + self.sql_mark_dirty() + +class revoked_cert_obj(rpki.sql.sql_persistent): + """ + Tombstone for a revoked certificate. + """ + + sql_template = rpki.sql.template( + "revoked_cert", + "revoked_cert_id", + "serial", + "ca_detail_id", + ("revoked", rpki.sundial.datetime), + ("expires", rpki.sundial.datetime)) + + def __init__(self, gctx = None, serial = None, revoked = None, expires = None, ca_detail_id = None): + """Initialize a revoked_cert_obj.""" + rpki.sql.sql_persistent.__init__(self) + self.gctx = gctx + self.serial = serial + self.revoked = revoked + self.expires = expires + self.ca_detail_id = ca_detail_id + if serial or revoked or expires or ca_detail_id: + self.sql_mark_dirty() + + def ca_detail(self): + """Fetch ca_detail object to which this revoked_cert_obj links.""" + return ca_detail_obj.sql_fetch(self.gctx, self.ca_detail_id) + + @classmethod + def revoke(cls, cert, ca_detail): + """ + Revoke a certificate. + """ + return cls( + serial = cert.getSerial(), + expires = cert.getNotAfter(), + revoked = rpki.sundial.now(), + gctx = ca_detail.gctx, + ca_detail_id = ca_detail.ca_detail_id) + +class roa_obj(rpki.sql.sql_persistent): + """ + Route Origin Authorization. + """ + + sql_template = rpki.sql.template( + "roa", + "roa_id", + "ca_detail_id", + "self_id", + "asn", + ("roa", rpki.x509.ROA), + ("cert", rpki.x509.X509), + ("published", rpki.sundial.datetime)) + + ca_detail_id = None + cert = None + roa = None + published = None + + def self(self): + """ + Fetch self object to which this roa_obj links. + """ + return rpki.left_right.self_elt.sql_fetch(self.gctx, self.self_id) + + def ca_detail(self): + """ + Fetch ca_detail object to which this roa_obj links. + """ + return rpki.rpki_engine.ca_detail_obj.sql_fetch(self.gctx, self.ca_detail_id) + + def sql_fetch_hook(self): + """ + Extra SQL fetch actions for roa_obj -- handle prefix lists. + """ + for version, datatype, attribute in ((4, rpki.resource_set.roa_prefix_set_ipv4, "ipv4"), + (6, rpki.resource_set.roa_prefix_set_ipv6, "ipv6")): + setattr(self, attribute, datatype.from_sql( + self.gctx.sql, + """ + SELECT prefix, prefixlen, max_prefixlen FROM roa_prefix + WHERE roa_id = %s AND version = %s + """, + (self.roa_id, version))) + + def sql_insert_hook(self): + """ + Extra SQL insert actions for roa_obj -- handle prefix lists. + """ + for version, prefix_set in ((4, self.ipv4), (6, self.ipv6)): + if prefix_set: + self.gctx.sql.executemany( + """ + INSERT roa_prefix (roa_id, prefix, prefixlen, max_prefixlen, version) + VALUES (%s, %s, %s, %s, %s) + """, + ((self.roa_id, x.prefix, x.prefixlen, x.max_prefixlen, version) + for x in prefix_set)) + + def sql_delete_hook(self): + """ + Extra SQL delete actions for roa_obj -- handle prefix lists. + """ + self.gctx.sql.execute("DELETE FROM roa_prefix WHERE roa_id = %s", (self.roa_id,)) + + def __init__(self, gctx = None, self_id = None, asn = None, ipv4 = None, ipv6 = None): + rpki.sql.sql_persistent.__init__(self) + self.gctx = gctx + self.self_id = self_id + self.asn = asn + self.ipv4 = ipv4 + self.ipv6 = ipv6 + + # Defer marking new ROA as dirty until .generate() has a chance to + # finish setup, otherwise we get SQL consistency errors. + # + #if self_id or asn or ipv4 or ipv6: self.sql_mark_dirty() + + def update(self, publisher, fast = False): + """ + Bring this roa_obj's ROA up to date if necesssary. + """ + + v4 = self.ipv4.to_resource_set() if self.ipv4 is not None else rpki.resource_set.resource_set_ipv4() + v6 = self.ipv6.to_resource_set() if self.ipv6 is not None else rpki.resource_set.resource_set_ipv6() + + me = "<%s %s>" % (self.asn, ("%s,%s" % (v4, v6)).strip(",")) + + if self.roa is None: + rpki.log.debug("ROA doesn't exist, generating %s" % me) + return self.generate(publisher = publisher, fast = fast) + + ca_detail = self.ca_detail() + + if ca_detail is None: + rpki.log.debug("ROA has no associated ca_detail, generating %s" % me) + return self.generate(publisher = publisher, fast = fast) + + if ca_detail.state != "active": + rpki.log.debug("ROA's associated ca_detail not active (state %r), regenerating %s" % (ca_detail.state, me)) + return self.regenerate(publisher = publisher, fast = fast) + + regen_time = self.cert.getNotAfter() - rpki.sundial.timedelta(seconds = self.self().regen_margin) + + if rpki.sundial.now() > regen_time: + rpki.log.debug("ROA past threshold %s, regenerating %s" % (regen_time, me)) + return self.regenerate(publisher = publisher, fast = fast) + + ca_resources = ca_detail.latest_ca_cert.get_3779resources() + ee_resources = self.cert.get_3779resources() + + if ee_resources.oversized(ca_resources): + rpki.log.debug("ROA oversized with respect to CA, regenerating %s" % me) + return self.regenerate(publisher = publisher, fast = fast) + + if ee_resources.v4 != v4 or ee_resources.v6 != v6: + rpki.log.debug("ROA resources do not match EE, regenerating %s" % me) + return self.regenerate(publisher = publisher, fast = fast) + + def generate(self, publisher, fast = False): + """ + Generate a ROA. + + At present this does not support ROAs with multiple signatures + (neither does the current CMS code). + + At present we have no way of performing a direct lookup from a + desired set of resources to a covering certificate, so we have to + search. This could be quite slow if we have a lot of active + ca_detail objects. Punt on the issue for now, revisit if + profiling shows this as a hotspot. + + Once we have the right covering certificate, we generate the ROA + payload, generate a new EE certificate, use the EE certificate to + sign the ROA payload, publish the result, then throw away the + private key for the EE cert, all per the ROA specification. This + implies that generating a lot of ROAs will tend to thrash + /dev/random, but there is not much we can do about that. + + If fast is set, we leave generating the new manifest for our + caller to handle, presumably at the end of a bulk operation. + """ + + if self.ipv4 is None and self.ipv6 is None: + raise rpki.exceptions.EmptyROAPrefixList + + # Ugly and expensive search for covering ca_detail, there has to + # be a better way, but it would require the ability to test for + # resource subsets in SQL. + + v4 = self.ipv4.to_resource_set() if self.ipv4 is not None else rpki.resource_set.resource_set_ipv4() + v6 = self.ipv6.to_resource_set() if self.ipv6 is not None else rpki.resource_set.resource_set_ipv6() + + ca_detail = self.ca_detail() + if ca_detail is None or ca_detail.state != "active": + ca_detail = None + for parent in self.self().parents(): + for ca in parent.cas(): + ca_detail = ca.fetch_active() + if ca_detail is not None: + resources = ca_detail.latest_ca_cert.get_3779resources() + if v4.issubset(resources.v4) and v6.issubset(resources.v6): + break + ca_detail = None + if ca_detail is not None: + break + + if ca_detail is None: + raise rpki.exceptions.NoCoveringCertForROA, "generate() could not find a certificate covering %s %s" % (v4, v6) + + ca = ca_detail.ca() + resources = rpki.resource_set.resource_bag(v4 = v4, v6 = v6) + keypair = rpki.x509.RSA.generate() + + self.ca_detail_id = ca_detail.ca_detail_id + self.cert = ca_detail.issue_ee( + ca = ca, + resources = resources, + subject_key = keypair.get_RSApublic(), + sia = ((rpki.oids.name2oid["id-ad-signedObject"], ("uri", self.uri(keypair))),)) + self.roa = rpki.x509.ROA.build(self.asn, self.ipv4, self.ipv6, keypair, (self.cert,)) + self.published = rpki.sundial.now() + self.sql_store() + + rpki.log.debug("Generating ROA %r" % self.uri()) + publisher.publish(cls = rpki.publication.roa_elt, uri = self.uri(), obj = self.roa, repository = ca.parent().repository(), handler = self.published_callback) + if not fast: + ca_detail.generate_manifest(publisher = publisher) + + def published_callback(self, pdu): + """ + Check publication result. + """ + pdu.raise_if_error() + self.published = None + self.sql_mark_dirty() + + def revoke(self, publisher, regenerate = False, allow_failure = False, fast = False): + """ + Withdraw ROA associated with this roa_obj. + + In order to preserve make-before-break properties without + duplicating code, this method also handles generating a + replacement ROA when requested. + + If allow_failure is set, failing to withdraw the ROA will not be + considered an error. + + If fast is set, SQL actions will be deferred, on the assumption + that our caller will handle regenerating CRL and manifest and + flushing the SQL cache. + """ + + ca_detail = self.ca_detail() + cert = self.cert + roa = self.roa + uri = self.uri() + + if ca_detail.state != 'active': + self.ca_detail_id = None + + if regenerate: + self.generate(publisher = publisher, fast = fast) + + rpki.log.debug("Withdrawing ROA %r and revoking its EE cert" % uri) + rpki.rpki_engine.revoked_cert_obj.revoke(cert = cert, ca_detail = ca_detail) + publisher.withdraw(cls = rpki.publication.roa_elt, uri = uri, obj = roa, repository = ca_detail.ca().parent().repository(), + handler = False if allow_failure else None) + self.sql_mark_deleted() + if not fast: + ca_detail.generate_crl(publisher = publisher) + ca_detail.generate_manifest(publisher = publisher) + self.gctx.sql.sweep() + + def regenerate(self, publisher, fast = False): + """ + Reissue ROA associated with this roa_obj. + """ + if self.ca_detail() is None: + self.generate(publisher = publisher, fast = fast) + else: + self.revoke(publisher = publisher, regenerate = True, fast = fast) + + def uri(self, key = None): + """ + Return the publication URI for this roa_obj's ROA. + """ + return self.ca_detail().ca().sia_uri + self.uri_tail(key) + + def uri_tail(self, key = None): + """ + Return the tail (filename portion) of the publication URI for this + roa_obj's ROA. + """ + return (key or self.cert).gSKI() + ".roa" + + +class publication_queue(object): + """ + Utility to simplify publication from within rpkid. + + General idea here is to accumulate a collection of objects to be + published, in one or more repositories, each potentially with its + own completion callback. Eventually we want to publish everything + we've accumulated, at which point we need to iterate over the + collection and do repository.call_pubd() for each repository. + """ + + replace = True + + def __init__(self): + self.repositories = {} + self.msgs = {} + self.handlers = {} + if self.replace: + self.uris = {} + + def _add(self, uri, obj, repository, handler, make_pdu): + rid = id(repository) + if rid not in self.repositories: + self.repositories[rid] = repository + self.msgs[rid] = rpki.publication.msg.query() + if self.replace and uri in self.uris: + rpki.log.debug("Removing publication duplicate <%s %r %r>" % (self.uris[uri].action, self.uris[uri].uri, self.uris[uri].payload)) + self.msgs[rid].remove(self.uris.pop(uri)) + pdu = make_pdu(uri = uri, obj = obj) + if handler is not None: + self.handlers[id(pdu)] = handler + pdu.tag = id(pdu) + self.msgs[rid].append(pdu) + if self.replace: + self.uris[uri] = pdu + + def publish(self, cls, uri, obj, repository, handler = None): + return self._add( uri, obj, repository, handler, cls.make_publish) + + def withdraw(self, cls, uri, obj, repository, handler = None): + return self._add( uri, obj, repository, handler, cls.make_withdraw) + + def call_pubd(self, cb, eb): + def loop(iterator, rid): + self.repositories[rid].call_pubd(iterator, eb, self.msgs[rid], self.handlers) + rpki.async.iterator(self.repositories, loop, cb) |