mirror of
https://salsa.debian.org/freeipa-team/freeipa.git
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706c003615
A new SELinux policy allows communication between IPA framework running under Apache with oddjobd-based services via DBus. This communication is crucial for one-way trust support and also is required for any out of band tools which may be executed by IPA framework. Details of out of band communication and SELinux policy can be found in a bug https://bugzilla.redhat.com/show_bug.cgi?id=1238165 Reviewed-By: Tomas Babej <tbabej@redhat.com>
506 lines
20 KiB
Python
506 lines
20 KiB
Python
# Authors: Rob Crittenden <rcritten@redhat.com>
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#
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# Copyright (C) 2007 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import os
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import os.path
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import tempfile
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import pwd
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import shutil
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import re
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import dbus
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import shlex
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import pipes
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import service
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import certs
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import installutils
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from ipapython import sysrestore
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from ipapython import ipautil
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from ipapython import dogtag
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from ipapython.dn import DN
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from ipapython.ipa_log_manager import root_logger
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import ipapython.errors
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from ipaserver.install import sysupgrade
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from ipalib import api
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from ipalib import errors
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from ipaplatform.tasks import tasks
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from ipaplatform.paths import paths
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from ipaplatform import services
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SELINUX_BOOLEAN_SETTINGS = dict(
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httpd_can_network_connect='on',
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httpd_manage_ipa='on',
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httpd_run_ipa='on',
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)
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def httpd_443_configured():
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"""
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We now allow mod_ssl to be installed so don't automatically disable it.
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However it can't share the same listen port as mod_nss, so check for that.
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Returns True if something other than mod_nss is listening on 443.
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False otherwise.
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"""
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try:
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(stdout, stderr, rc) = ipautil.run([paths.HTTPD, '-t', '-D', 'DUMP_VHOSTS'])
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except ipautil.CalledProcessError, e:
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service.print_msg("WARNING: cannot check if port 443 is already configured")
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service.print_msg("httpd returned error when checking: %s" % e)
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return False
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port_line_re = re.compile(r'(?P<address>\S+):(?P<port>\d+)')
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for line in stdout.splitlines():
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m = port_line_re.match(line)
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if m and int(m.group('port')) == 443:
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service.print_msg("Apache is already configured with a listener on port 443:")
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service.print_msg(line)
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return True
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return False
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class WebGuiInstance(service.SimpleServiceInstance):
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def __init__(self):
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service.SimpleServiceInstance.__init__(self, "ipa_webgui")
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class HTTPInstance(service.Service):
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def __init__(self, fstore=None, cert_nickname='Server-Cert'):
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service.Service.__init__(self, "httpd", service_desc="the web interface")
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if fstore:
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self.fstore = fstore
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else:
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self.fstore = sysrestore.FileStore(paths.SYSRESTORE)
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self.cert_nickname = cert_nickname
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self.ca_is_configured = True
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subject_base = ipautil.dn_attribute_property('_subject_base')
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def create_instance(self, realm, fqdn, domain_name, dm_password=None,
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autoconfig=True, pkcs12_info=None,
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subject_base=None, auto_redirect=True, ca_file=None,
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ca_is_configured=None):
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self.fqdn = fqdn
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self.realm = realm
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self.domain = domain_name
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self.dm_password = dm_password
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self.suffix = ipautil.realm_to_suffix(self.realm)
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self.pkcs12_info = pkcs12_info
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self.principal = "HTTP/%s@%s" % (self.fqdn, self.realm)
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self.dercert = None
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self.subject_base = subject_base
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self.sub_dict = dict(
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REALM=realm,
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FQDN=fqdn,
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DOMAIN=self.domain,
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AUTOREDIR='' if auto_redirect else '#',
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CRL_PUBLISH_PATH=dogtag.install_constants.CRL_PUBLISH_PATH,
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)
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self.ca_file = ca_file
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if ca_is_configured is not None:
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self.ca_is_configured = ca_is_configured
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# get a connection to the DS
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self.ldap_connect()
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self.step("setting mod_nss port to 443", self.__set_mod_nss_port)
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self.step("setting mod_nss protocol list to TLSv1.0 - TLSv1.2",
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self.set_mod_nss_protocol)
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self.step("setting mod_nss password file", self.__set_mod_nss_passwordfile)
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self.step("enabling mod_nss renegotiate", self.enable_mod_nss_renegotiate)
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self.step("adding URL rewriting rules", self.__add_include)
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self.step("configuring httpd", self.__configure_http)
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if self.ca_is_configured:
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self.step("configure certmonger for renewals",
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self.configure_certmonger_renewal_guard)
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self.step("setting up ssl", self.__setup_ssl)
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self.step("importing CA certificates from LDAP", self.__import_ca_certs)
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if autoconfig:
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self.step("setting up browser autoconfig", self.__setup_autoconfig)
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self.step("publish CA cert", self.__publish_ca_cert)
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self.step("creating a keytab for httpd", self.__create_http_keytab)
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self.step("clean up any existing httpd ccache", self.remove_httpd_ccache)
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self.step("configuring SELinux for httpd", self.configure_selinux_for_httpd)
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if not self.is_kdcproxy_configured():
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self.step("create KDC proxy config", self.create_kdcproxy_conf)
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self.step("enable KDC proxy", self.enable_kdcproxy)
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self.step("restarting httpd", self.__start)
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self.step("configuring httpd to start on boot", self.__enable)
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self.start_creation(runtime=60)
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def __start(self):
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self.backup_state("running", self.is_running())
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self.restart()
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def __enable(self):
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self.backup_state("enabled", self.is_enabled())
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# We do not let the system start IPA components on its own,
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# Instead we reply on the IPA init script to start only enabled
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# components as found in our LDAP configuration tree
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self.ldap_enable('HTTP', self.fqdn, self.dm_password, self.suffix)
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def configure_selinux_for_httpd(self):
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try:
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tasks.set_selinux_booleans(SELINUX_BOOLEAN_SETTINGS,
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self.backup_state)
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except ipapython.errors.SetseboolError as e:
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self.print_msg(e.format_service_warning('web interface'))
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def __create_http_keytab(self):
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installutils.kadmin_addprinc(self.principal)
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installutils.create_keytab(paths.IPA_KEYTAB, self.principal)
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self.move_service(self.principal)
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self.add_cert_to_service()
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pent = pwd.getpwnam("apache")
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os.chown(paths.IPA_KEYTAB, pent.pw_uid, pent.pw_gid)
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def remove_httpd_ccache(self):
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# Clean up existing ccache
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# Make sure that empty env is passed to avoid passing KRB5CCNAME from
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# current env
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ipautil.run(['kdestroy', '-A'], runas='apache', raiseonerr=False, env={})
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def __configure_http(self):
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target_fname = paths.HTTPD_IPA_CONF
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http_txt = ipautil.template_file(ipautil.SHARE_DIR + "ipa.conf", self.sub_dict)
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self.fstore.backup_file(paths.HTTPD_IPA_CONF)
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http_fd = open(target_fname, "w")
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http_fd.write(http_txt)
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http_fd.close()
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os.chmod(target_fname, 0644)
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target_fname = paths.HTTPD_IPA_REWRITE_CONF
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http_txt = ipautil.template_file(ipautil.SHARE_DIR + "ipa-rewrite.conf", self.sub_dict)
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self.fstore.backup_file(paths.HTTPD_IPA_REWRITE_CONF)
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http_fd = open(target_fname, "w")
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http_fd.write(http_txt)
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http_fd.close()
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os.chmod(target_fname, 0644)
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def change_mod_nss_port_from_http(self):
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# mod_ssl enforces SSLEngine on for vhost on 443 even though
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# the listener is mod_nss. This then crashes the httpd as mod_nss
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# listened port obviously does not match mod_ssl requirements.
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#
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# The workaround for this was to change port to http. It is no longer
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# necessary, as mod_nss now ships with default configuration which
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# sets SSLEngine off when mod_ssl is installed.
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#
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# Remove the workaround.
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if sysupgrade.get_upgrade_state('nss.conf', 'listen_port_updated'):
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installutils.set_directive(paths.HTTPD_NSS_CONF, 'Listen', '443', quotes=False)
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sysupgrade.set_upgrade_state('nss.conf', 'listen_port_updated', False)
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def __set_mod_nss_port(self):
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self.fstore.backup_file(paths.HTTPD_NSS_CONF)
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if installutils.update_file(paths.HTTPD_NSS_CONF, '8443', '443') != 0:
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print "Updating port in %s failed." % paths.HTTPD_NSS_CONF
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def __set_mod_nss_nickname(self, nickname):
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installutils.set_directive(paths.HTTPD_NSS_CONF, 'NSSNickname', nickname)
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def set_mod_nss_protocol(self):
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installutils.set_directive(paths.HTTPD_NSS_CONF, 'NSSProtocol', 'TLSv1.0,TLSv1.1,TLSv1.2', False)
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def enable_mod_nss_renegotiate(self):
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installutils.set_directive(paths.HTTPD_NSS_CONF, 'NSSRenegotiation', 'on', False)
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installutils.set_directive(paths.HTTPD_NSS_CONF, 'NSSRequireSafeNegotiation', 'on', False)
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def __set_mod_nss_passwordfile(self):
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installutils.set_directive(paths.HTTPD_NSS_CONF, 'NSSPassPhraseDialog', 'file:/etc/httpd/conf/password.conf')
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def __add_include(self):
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"""This should run after __set_mod_nss_port so is already backed up"""
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if installutils.update_file(paths.HTTPD_NSS_CONF, '</VirtualHost>', 'Include conf.d/ipa-rewrite.conf\n</VirtualHost>') != 0:
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print "Adding Include conf.d/ipa-rewrite to %s failed." % paths.HTTPD_NSS_CONF
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def configure_certmonger_renewal_guard(self):
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certmonger = services.knownservices.certmonger
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certmonger_stopped = not certmonger.is_running()
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if certmonger_stopped:
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certmonger.start()
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try:
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bus = dbus.SystemBus()
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obj = bus.get_object('org.fedorahosted.certmonger',
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'/org/fedorahosted/certmonger')
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iface = dbus.Interface(obj, 'org.fedorahosted.certmonger')
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path = iface.find_ca_by_nickname('IPA')
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if path:
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ca_obj = bus.get_object('org.fedorahosted.certmonger', path)
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ca_iface = dbus.Interface(ca_obj,
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'org.freedesktop.DBus.Properties')
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helper = ca_iface.Get('org.fedorahosted.certmonger.ca',
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'external-helper')
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if helper:
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args = shlex.split(helper)
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if args[0] != paths.IPA_SERVER_GUARD:
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self.backup_state('certmonger_ipa_helper', helper)
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args = [paths.IPA_SERVER_GUARD] + args
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helper = ' '.join(pipes.quote(a) for a in args)
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ca_iface.Set('org.fedorahosted.certmonger.ca',
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'external-helper', helper)
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finally:
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if certmonger_stopped:
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certmonger.stop()
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def __setup_ssl(self):
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fqdn = self.fqdn
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ca_db = certs.CertDB(self.realm, host_name=fqdn, subject_base=self.subject_base)
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db = certs.CertDB(self.realm, subject_base=self.subject_base)
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if self.pkcs12_info:
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if self.ca_is_configured:
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trust_flags = 'CT,C,C'
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else:
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trust_flags = None
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db.create_from_pkcs12(self.pkcs12_info[0], self.pkcs12_info[1],
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passwd=None, ca_file=self.ca_file,
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trust_flags=trust_flags)
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server_certs = db.find_server_certs()
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if len(server_certs) == 0:
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raise RuntimeError("Could not find a suitable server cert in import in %s" % self.pkcs12_info[0])
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db.create_password_conf()
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# We only handle one server cert
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nickname = server_certs[0][0]
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self.dercert = db.get_cert_from_db(nickname, pem=False)
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if self.ca_is_configured:
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db.track_server_cert(nickname, self.principal, db.passwd_fname, 'restart_httpd')
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self.__set_mod_nss_nickname(nickname)
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else:
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db.create_password_conf()
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self.dercert = db.create_server_cert(self.cert_nickname, self.fqdn,
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ca_db)
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db.track_server_cert(self.cert_nickname, self.principal,
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db.passwd_fname, 'restart_httpd')
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db.create_signing_cert("Signing-Cert", "Object Signing Cert", ca_db)
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# Fix the database permissions
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os.chmod(certs.NSS_DIR + "/cert8.db", 0660)
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os.chmod(certs.NSS_DIR + "/key3.db", 0660)
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os.chmod(certs.NSS_DIR + "/secmod.db", 0660)
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os.chmod(certs.NSS_DIR + "/pwdfile.txt", 0660)
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pent = pwd.getpwnam("apache")
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os.chown(certs.NSS_DIR + "/cert8.db", 0, pent.pw_gid )
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os.chown(certs.NSS_DIR + "/key3.db", 0, pent.pw_gid )
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os.chown(certs.NSS_DIR + "/secmod.db", 0, pent.pw_gid )
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os.chown(certs.NSS_DIR + "/pwdfile.txt", 0, pent.pw_gid )
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# Fix SELinux permissions on the database
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tasks.restore_context(certs.NSS_DIR + "/cert8.db")
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tasks.restore_context(certs.NSS_DIR + "/key3.db")
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def __import_ca_certs(self):
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db = certs.CertDB(self.realm, subject_base=self.subject_base)
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self.import_ca_certs(db, self.ca_is_configured)
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def __setup_autoconfig(self):
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target_fname = paths.PREFERENCES_HTML
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ipautil.copy_template_file(
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ipautil.SHARE_DIR + "preferences.html.template",
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target_fname, self.sub_dict)
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os.chmod(target_fname, 0644)
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# The signing cert is generated in __setup_ssl
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db = certs.CertDB(self.realm, subject_base=self.subject_base)
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with open(db.passwd_fname) as pwdfile:
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pwd = pwdfile.read()
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# Setup configure.jar
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if db.has_nickname('Signing-Cert'):
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tmpdir = tempfile.mkdtemp(prefix="tmp-")
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target_fname = paths.CONFIGURE_JAR
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shutil.copy(paths.PREFERENCES_HTML, tmpdir)
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db.run_signtool(["-k", "Signing-Cert",
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"-Z", target_fname,
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"-e", ".html", "-p", pwd,
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tmpdir])
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shutil.rmtree(tmpdir)
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os.chmod(target_fname, 0644)
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else:
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root_logger.warning('Object-signing certificate was not found; '
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'therefore, configure.jar was not created.')
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self.setup_firefox_extension(self.realm, self.domain)
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def setup_firefox_extension(self, realm, domain):
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"""Set up the signed browser configuration extension
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"""
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target_fname = paths.KRB_JS
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sub_dict = dict(REALM=realm, DOMAIN=domain)
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db = certs.CertDB(realm)
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with open(db.passwd_fname) as pwdfile:
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pwd = pwdfile.read()
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ipautil.copy_template_file(ipautil.SHARE_DIR + "krb.js.template",
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target_fname, sub_dict)
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os.chmod(target_fname, 0644)
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# Setup extension
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tmpdir = tempfile.mkdtemp(prefix="tmp-")
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extdir = tmpdir + "/ext"
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target_fname = paths.KERBEROSAUTH_XPI
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shutil.copytree(paths.FFEXTENSION, extdir)
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if db.has_nickname('Signing-Cert'):
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db.run_signtool(["-k", "Signing-Cert",
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"-p", pwd,
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"-X", "-Z", target_fname,
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extdir])
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else:
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root_logger.warning('Object-signing certificate was not found. '
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'Creating unsigned Firefox configuration extension.')
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filenames = os.listdir(extdir)
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ipautil.run([paths.ZIP, '-r', target_fname] + filenames,
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cwd=extdir)
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shutil.rmtree(tmpdir)
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os.chmod(target_fname, 0644)
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def __publish_ca_cert(self):
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ca_db = certs.CertDB(self.realm)
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ca_db.publish_ca_cert(paths.CA_CRT)
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def is_kdcproxy_configured(self):
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"""Check if KDC proxy has already been configured in the past"""
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return os.path.isfile(paths.HTTPD_IPA_KDCPROXY_CONF)
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def enable_kdcproxy(self):
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"""Add ipaConfigString=kdcProxyEnabled to cn=KDC"""
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entry_name = DN(('cn', 'KDC'), ('cn', self.fqdn), ('cn', 'masters'),
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('cn', 'ipa'), ('cn', 'etc'), self.suffix)
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attr_name = 'kdcProxyEnabled'
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try:
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entry = self.admin_conn.get_entry(entry_name, ['ipaConfigString'])
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except errors.NotFound:
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pass
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else:
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if any(attr_name.lower() == val.lower()
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for val in entry.get('ipaConfigString', [])):
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root_logger.debug("service KDCPROXY already enabled")
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return
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entry.setdefault('ipaConfigString', []).append(attr_name)
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try:
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self.admin_conn.update_entry(entry)
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except errors.EmptyModlist:
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root_logger.debug("service KDCPROXY already enabled")
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return
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except:
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root_logger.debug("failed to enable service KDCPROXY")
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raise
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root_logger.debug("service KDCPROXY enabled")
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return
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entry = self.admin_conn.make_entry(
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entry_name,
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objectclass=["nsContainer", "ipaConfigObject"],
|
|
cn=['KDC'],
|
|
ipaconfigstring=[attr_name]
|
|
)
|
|
|
|
try:
|
|
self.admin_conn.add_entry(entry)
|
|
except errors.DuplicateEntry:
|
|
root_logger.debug("failed to add service KDCPROXY entry")
|
|
raise
|
|
|
|
def create_kdcproxy_conf(self):
|
|
"""Create ipa-kdc-proxy.conf in /etc/ipa/kdcproxy"""
|
|
target_fname = paths.HTTPD_IPA_KDCPROXY_CONF
|
|
sub_dict = dict(KDCPROXY_CONFIG=paths.KDCPROXY_CONFIG)
|
|
http_txt = ipautil.template_file(
|
|
ipautil.SHARE_DIR + "ipa-kdc-proxy.conf.template", sub_dict)
|
|
self.fstore.backup_file(target_fname)
|
|
with open(target_fname, 'w') as f:
|
|
f.write(http_txt)
|
|
os.chmod(target_fname, 0644)
|
|
|
|
def uninstall(self):
|
|
if self.is_configured():
|
|
self.print_msg("Unconfiguring web server")
|
|
|
|
running = self.restore_state("running")
|
|
enabled = self.restore_state("enabled")
|
|
|
|
|
|
self.stop_tracking_certificates()
|
|
|
|
helper = self.restore_state('certmonger_ipa_helper')
|
|
if helper:
|
|
bus = dbus.SystemBus()
|
|
obj = bus.get_object('org.fedorahosted.certmonger',
|
|
'/org/fedorahosted/certmonger')
|
|
iface = dbus.Interface(obj, 'org.fedorahosted.certmonger')
|
|
path = iface.find_ca_by_nickname('IPA')
|
|
if path:
|
|
ca_obj = bus.get_object('org.fedorahosted.certmonger', path)
|
|
ca_iface = dbus.Interface(ca_obj,
|
|
'org.freedesktop.DBus.Properties')
|
|
ca_iface.Set('org.fedorahosted.certmonger.ca',
|
|
'external-helper', helper)
|
|
|
|
for f in [paths.HTTPD_IPA_CONF, paths.HTTPD_SSL_CONF, paths.HTTPD_NSS_CONF]:
|
|
try:
|
|
self.fstore.restore_file(f)
|
|
except ValueError, error:
|
|
root_logger.debug(error)
|
|
pass
|
|
|
|
# Remove the ccache file for the HTTPD service
|
|
ipautil.run([paths.KDESTROY, '-c', paths.KRB5CC_HTTPD], runas='apache',
|
|
raiseonerr=False)
|
|
|
|
# Remove the configuration files we create
|
|
installutils.remove_file(paths.HTTPD_IPA_REWRITE_CONF)
|
|
installutils.remove_file(paths.HTTPD_IPA_CONF)
|
|
installutils.remove_file(paths.HTTPD_IPA_PKI_PROXY_CONF)
|
|
installutils.remove_file(paths.HTTPD_IPA_KDCPROXY_CONF_SYMLINK)
|
|
installutils.remove_file(paths.HTTPD_IPA_KDCPROXY_CONF)
|
|
|
|
# Restore SELinux boolean states
|
|
boolean_states = {name: self.restore_state(name)
|
|
for name in SELINUX_BOOLEAN_SETTINGS}
|
|
try:
|
|
tasks.set_selinux_booleans(boolean_states)
|
|
except ipapython.errors.SetseboolError as e:
|
|
self.print_msg('WARNING: ' + str(e))
|
|
|
|
if running:
|
|
self.restart()
|
|
|
|
# disabled by default, by ldap_enable()
|
|
if enabled:
|
|
self.enable()
|
|
|
|
def stop_tracking_certificates(self):
|
|
db = certs.CertDB(api.env.realm)
|
|
db.untrack_server_cert(self.cert_nickname)
|