freeipa/install/restart_scripts/renew_ca_cert

#!/usr/bin/python2 -E
#
# Authors:
#   Rob Crittenden <rcritten@redhat.com>
#   Jan Cholasta <jcholast@redhat.com>
#
# Copyright (C) 2013  Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import sys
import os
import syslog
import tempfile
import shutil
import traceback

from ipalib.install import certstore
from ipapython import ipautil
from ipalib import api, errors, x509
from ipalib.install.kinit import kinit_keytab
from ipaserver.install import certs, cainstance, installutils
from ipaserver.plugins.ldap2 import ldap2
from ipaplatform import services
from ipaplatform.paths import paths


def _main():
    nickname = sys.argv[1]

    api.bootstrap(in_server=True, context='restart', confdir=paths.ETC_IPA)
    api.finalize()

    dogtag_service = services.knownservices['pki_tomcatd']

    # dogtag opens its NSS database in read/write mode so we need it
    # shut down so certmonger can open it read/write mode. This avoids
    # database corruption. It should already be stopped by the pre-command
    # but lets be sure.
    if dogtag_service.is_running('pki-tomcat'):
        syslog.syslog(
            syslog.LOG_NOTICE, "Stopping %s" % dogtag_service.service_name)
        try:
            dogtag_service.stop('pki-tomcat')
        except Exception as e:
            syslog.syslog(
                syslog.LOG_ERR,
                "Cannot stop %s: %s" % (dogtag_service.service_name, e))
        else:
            syslog.syslog(
                syslog.LOG_NOTICE, "Stopped %s" % dogtag_service.service_name)

    # Fetch the new certificate
    db = certs.CertDB(api.env.realm, nssdir=paths.PKI_TOMCAT_ALIAS_DIR)
    cert = db.get_cert_from_db(nickname, pem=False)
    if not cert:
        syslog.syslog(syslog.LOG_ERR, 'No certificate %s found.' % nickname)
        sys.exit(1)

    tmpdir = tempfile.mkdtemp(prefix="tmp-")
    try:
        principal = str('host/%s@%s' % (api.env.host, api.env.realm))
        ccache_filename = os.path.join(tmpdir, 'ccache')
        kinit_keytab(principal, paths.KRB5_KEYTAB, ccache_filename)
        os.environ['KRB5CCNAME'] = ccache_filename

        api.Backend.ldap2.connect()

        ca = cainstance.CAInstance(host_name=api.env.host)
        ca.update_cert_config(nickname, cert)
        if ca.is_renewal_master():
            cainstance.update_people_entry(cert)
            cainstance.update_authority_entry(cert)

        if nickname == 'auditSigningCert cert-pki-ca':
            # Fix trust on the audit cert
            try:
                db.run_certutil(['-M',
                                 '-n', nickname,
                                 '-t', 'u,u,Pu'])
                syslog.syslog(
                    syslog.LOG_NOTICE,
                    "Updated trust on certificate %s in %s" %
                    (nickname, db.secdir))
            except ipautil.CalledProcessError:
                syslog.syslog(
                    syslog.LOG_ERR,
                    "Updating trust on certificate %s failed in %s" %
                    (nickname, db.secdir))
        elif nickname == 'caSigningCert cert-pki-ca':
            # Update CS.cfg
            cfg_path = paths.CA_CS_CFG_PATH
            config = installutils.get_directive(
                cfg_path, 'subsystem.select', '=')
            if config == 'New':
                syslog.syslog(syslog.LOG_NOTICE, "Updating CS.cfg")
                if x509.is_self_signed(cert, x509.DER):
                    installutils.set_directive(
                        cfg_path, 'hierarchy.select', 'Root',
                        quotes=False, separator='=')
                    installutils.set_directive(
                        cfg_path, 'subsystem.count', '1',
                        quotes=False, separator='=')
                else:
                    installutils.set_directive(
                        cfg_path, 'hierarchy.select', 'Subordinate',
                        quotes=False, separator='=')
                    installutils.set_directive(
                        cfg_path, 'subsystem.count', '0',
                        quotes=False, separator='=')
            else:
                syslog.syslog(syslog.LOG_NOTICE, "Not updating CS.cfg")

            # Remove old external CA certificates
            for ca_nick, ca_flags in db.list_certs():
                if ca_flags.has_key:
                    continue
                # Delete *all* certificates that use the nickname
                while True:
                    try:
                        db.delete_cert(ca_nick)
                    except ipautil.CalledProcessError:
                        syslog.syslog(
                            syslog.LOG_ERR,
                            "Failed to remove certificate %s" % ca_nick)
                        break
                    if not db.has_nickname(ca_nick):
                        break

            conn = None
            try:
                conn = ldap2(api)
                conn.connect(ccache=ccache_filename)
            except Exception as e:
                syslog.syslog(
                    syslog.LOG_ERR, "Failed to connect to LDAP: %s" % e)
            else:
                # Update CA certificate in LDAP
                if ca.is_renewal_master():
                    try:
                        certstore.update_ca_cert(conn, api.env.basedn, cert)
                    except errors.EmptyModlist:
                        pass
                    except Exception as e:
                        syslog.syslog(
                            syslog.LOG_ERR,
                            "Updating CA certificate failed: %s" % e)

                # Add external CA certificates
                try:
                    ca_certs = certstore.get_ca_certs_nss(
                        conn, api.env.basedn, api.env.realm, False)
                except Exception as e:
                    syslog.syslog(
                        syslog.LOG_ERR,
                        "Failed to get external CA certificates from LDAP: "
                        "%s" % e)
                    ca_certs = []

                for ca_cert, ca_nick, ca_flags in ca_certs:
                    try:
                        db.add_cert(ca_cert, ca_nick, ca_flags)
                    except ipautil.CalledProcessError as e:
                        syslog.syslog(
                            syslog.LOG_ERR,
                            "Failed to add certificate %s" % ca_nick)

                # Pass Dogtag's self-tests
                for ca_nick in db.find_root_cert(nickname)[-2:-1]:
                    ca_flags = dict(cc[1:] for cc in ca_certs)[ca_nick]
                    db.trust_root_cert(ca_nick, 'C' + ca_flags)
            finally:
                if conn is not None and conn.isconnected():
                    conn.disconnect()
    finally:
        if api.Backend.ldap2.isconnected():
            api.Backend.ldap2.disconnect()
        shutil.rmtree(tmpdir)

    # Now we can start the CA. Using the services start should fire
    # off the servlet to verify that the CA is actually up and responding so
    # when this returns it should be good-to-go. The CA was stopped in the
    # pre-save state.
    syslog.syslog(
        syslog.LOG_NOTICE,
        'Starting %s' % dogtag_service.service_name)
    try:
        dogtag_service.start('pki-tomcat')
    except Exception as e:
        syslog.syslog(
            syslog.LOG_ERR,
            "Cannot start %s: %s" % (dogtag_service.service_name, e))
    else:
        syslog.syslog(
            syslog.LOG_NOTICE, "Started %s" % dogtag_service.service_name)


def main():
    try:
        _main()
    finally:
        certs.renewal_lock.release('renew_ca_cert')


try:
    main()
except Exception:
    syslog.syslog(syslog.LOG_ERR, traceback.format_exc())