# Authors: Rob Crittenden # # Copyright (C) 2007 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 . # from __future__ import print_function import logging import os import os.path import pwd import re import dbus import shlex import pipes import locale import six from augeas import Augeas from ipalib.install import certmonger from ipapython import ipaldap from ipapython.certdb import (IPA_CA_TRUST_FLAGS, EXTERNAL_CA_TRUST_FLAGS) from ipaserver.install import replication from ipaserver.install import service from ipaserver.install import certs from ipaserver.install import installutils from ipapython import dogtag from ipapython import ipautil from ipapython.dn import DN import ipapython.errors from ipaserver.install import sysupgrade from ipalib import api from ipaplatform.constants import constants from ipaplatform.tasks import tasks from ipaplatform.paths import paths from ipaplatform import services logger = logging.getLogger(__name__) HTTPD_USER = constants.HTTPD_USER KDCPROXY_USER = constants.KDCPROXY_USER # See contrib/nsscipersuite/nssciphersuite.py NSS_CIPHER_SUITE = [ '+aes_128_sha_256', '+aes_256_sha_256', '+ecdhe_ecdsa_aes_128_gcm_sha_256', '+ecdhe_ecdsa_aes_128_sha', '+ecdhe_ecdsa_aes_256_gcm_sha_384', '+ecdhe_ecdsa_aes_256_sha', '+ecdhe_rsa_aes_128_gcm_sha_256', '+ecdhe_rsa_aes_128_sha', '+ecdhe_rsa_aes_256_gcm_sha_384', '+ecdhe_rsa_aes_256_sha', '+rsa_aes_128_gcm_sha_256', '+rsa_aes_128_sha', '+rsa_aes_256_gcm_sha_384', '+rsa_aes_256_sha' ] NSS_CIPHER_REVISION = '20160129' OCSP_DIRECTIVE = 'NSSOCSP' NSS_OCSP_ENABLED = 'nss_ocsp_enabled' def httpd_443_configured(): """ We now allow mod_ssl to be installed so don't automatically disable it. However it can't share the same listen port as mod_nss, so check for that. Returns True if something other than mod_nss is listening on 443. False otherwise. """ try: result = ipautil.run([paths.HTTPD, '-t', '-D', 'DUMP_VHOSTS'], capture_output=True) except ipautil.CalledProcessError as e: service.print_msg("WARNING: cannot check if port 443 is already configured") service.print_msg("httpd returned error when checking: %s" % e) return False port_line_re = re.compile(r'(?P
\S+):(?P\d+)') stdout = result.raw_output if six.PY3: stdout = stdout.decode(locale.getpreferredencoding(), errors='replace') for line in stdout.splitlines(): m = port_line_re.match(line) if m and int(m.group('port')) == 443: service.print_msg("Apache is already configured with a listener on port 443:") service.print_msg(line) return True return False class WebGuiInstance(service.SimpleServiceInstance): def __init__(self): service.SimpleServiceInstance.__init__(self, "ipa_webgui") class HTTPInstance(service.Service): def __init__(self, fstore=None, cert_nickname='Server-Cert', api=api): super(HTTPInstance, self).__init__( "httpd", service_desc="the web interface", fstore=fstore, api=api, service_prefix=u'HTTP', service_user=HTTPD_USER, keytab=paths.HTTP_KEYTAB) self.cacert_nickname = None self.cert_nickname = cert_nickname self.ca_is_configured = True self.keytab_user = constants.GSSPROXY_USER subject_base = ipautil.dn_attribute_property('_subject_base') def create_instance(self, realm, fqdn, domain_name, dm_password=None, pkcs12_info=None, subject_base=None, auto_redirect=True, ca_file=None, ca_is_configured=None, promote=False, master_fqdn=None): self.fqdn = fqdn self.realm = realm self.domain = domain_name self.dm_password = dm_password self.suffix = ipautil.realm_to_suffix(self.realm) self.pkcs12_info = pkcs12_info self.cert = None self.subject_base = subject_base self.sub_dict = dict( REALM=realm, FQDN=fqdn, DOMAIN=self.domain, AUTOREDIR='' if auto_redirect else '#', CRL_PUBLISH_PATH=paths.PKI_CA_PUBLISH_DIR, ) self.ca_file = ca_file if ca_is_configured is not None: self.ca_is_configured = ca_is_configured self.promote = promote self.master_fqdn = master_fqdn self.step("stopping httpd", self.__stop) self.step("setting mod_nss port to 443", self.__set_mod_nss_port) self.step("setting mod_nss cipher suite", self.set_mod_nss_cipher_suite) self.step("setting mod_nss protocol list to TLSv1.0 - TLSv1.2", self.set_mod_nss_protocol) self.step("setting mod_nss password file", self.__set_mod_nss_passwordfile) self.step("enabling mod_nss renegotiate", self.enable_mod_nss_renegotiate) self.step("disabling mod_nss OCSP", self.disable_mod_nss_ocsp) self.step("adding URL rewriting rules", self.__add_include) self.step("configuring httpd", self.__configure_http) self.step("setting up httpd keytab", self.request_service_keytab) self.step("configuring Gssproxy", self.configure_gssproxy) self.step("setting up ssl", self.__setup_ssl) if self.ca_is_configured: self.step("configure certmonger for renewals", self.configure_certmonger_renewal_guard) self.step("importing CA certificates from LDAP", self.__import_ca_certs) self.step("publish CA cert", self.__publish_ca_cert) self.step("clean up any existing httpd ccaches", self.remove_httpd_ccaches) self.step("configuring SELinux for httpd", self.configure_selinux_for_httpd) if not self.is_kdcproxy_configured(): self.step("create KDC proxy config", self.create_kdcproxy_conf) self.step("enable KDC proxy", self.enable_kdcproxy) self.step("starting httpd", self.start) self.step("configuring httpd to start on boot", self.__enable) self.step("enabling oddjobd", self.enable_and_start_oddjobd) self.start_creation() def __stop(self): self.backup_state("running", self.is_running()) self.stop() def __enable(self): self.backup_state("enabled", self.is_enabled()) # We do not let the system start IPA components on its own, # Instead we reply on the IPA init script to start only enabled # components as found in our LDAP configuration tree self.ldap_enable('HTTP', self.fqdn, None, self.suffix) def configure_selinux_for_httpd(self): try: tasks.set_selinux_booleans(constants.SELINUX_BOOLEAN_HTTPD, self.backup_state) except ipapython.errors.SetseboolError as e: self.print_msg(e.format_service_warning('web interface')) def remove_httpd_ccaches(self): # Clean up existing ccaches # Make sure that empty env is passed to avoid passing KRB5CCNAME from # current env installutils.remove_file(paths.HTTP_CCACHE) for f in os.listdir(paths.IPA_CCACHES): os.remove(os.path.join(paths.IPA_CCACHES, f)) def __configure_http(self): self.update_httpd_service_ipa_conf() target_fname = paths.HTTPD_IPA_CONF http_txt = ipautil.template_file( os.path.join(paths.USR_SHARE_IPA_DIR, "ipa.conf"), self.sub_dict) self.fstore.backup_file(paths.HTTPD_IPA_CONF) http_fd = open(target_fname, "w") http_fd.write(http_txt) http_fd.close() os.chmod(target_fname, 0o644) target_fname = paths.HTTPD_IPA_REWRITE_CONF http_txt = ipautil.template_file( os.path.join(paths.USR_SHARE_IPA_DIR, "ipa-rewrite.conf"), self.sub_dict) self.fstore.backup_file(paths.HTTPD_IPA_REWRITE_CONF) http_fd = open(target_fname, "w") http_fd.write(http_txt) http_fd.close() os.chmod(target_fname, 0o644) def configure_gssproxy(self): tasks.configure_http_gssproxy_conf() services.knownservices.gssproxy.restart() def change_mod_nss_port_from_http(self): # mod_ssl enforces SSLEngine on for vhost on 443 even though # the listener is mod_nss. This then crashes the httpd as mod_nss # listened port obviously does not match mod_ssl requirements. # # The workaround for this was to change port to http. It is no longer # necessary, as mod_nss now ships with default configuration which # sets SSLEngine off when mod_ssl is installed. # # Remove the workaround. if sysupgrade.get_upgrade_state('nss.conf', 'listen_port_updated'): installutils.set_directive(paths.HTTPD_NSS_CONF, 'Listen', '443', quotes=False) sysupgrade.set_upgrade_state('nss.conf', 'listen_port_updated', False) def __set_mod_nss_port(self): self.fstore.backup_file(paths.HTTPD_NSS_CONF) if installutils.update_file(paths.HTTPD_NSS_CONF, '8443', '443') != 0: print("Updating port in %s failed." % paths.HTTPD_NSS_CONF) def __set_mod_nss_nickname(self, nickname): quoted_nickname = installutils.quote_directive_value( nickname, quote_char="'") installutils.set_directive( paths.HTTPD_NSS_CONF, 'NSSNickname', quoted_nickname, quotes=False) def set_mod_nss_protocol(self): installutils.set_directive(paths.HTTPD_NSS_CONF, 'NSSProtocol', 'TLSv1.0,TLSv1.1,TLSv1.2', False) def enable_mod_nss_renegotiate(self): installutils.set_directive(paths.HTTPD_NSS_CONF, 'NSSRenegotiation', 'on', False) installutils.set_directive(paths.HTTPD_NSS_CONF, 'NSSRequireSafeNegotiation', 'on', False) def disable_mod_nss_ocsp(self): if sysupgrade.get_upgrade_state('http', NSS_OCSP_ENABLED) is None: self.__disable_mod_nss_ocsp() sysupgrade.set_upgrade_state('http', NSS_OCSP_ENABLED, False) def __disable_mod_nss_ocsp(self): aug = Augeas(flags=Augeas.NO_LOAD | Augeas.NO_MODL_AUTOLOAD) aug.set('/augeas/load/Httpd/lens', 'Httpd.lns') aug.set('/augeas/load/Httpd/incl', paths.HTTPD_NSS_CONF) aug.load() path = '/files{}/VirtualHost'.format(paths.HTTPD_NSS_CONF) ocsp_path = '{}/directive[.="{}"]'.format(path, OCSP_DIRECTIVE) ocsp_arg = '{}/arg'.format(ocsp_path) ocsp_comment = '{}/#comment[.="{}"]'.format(path, OCSP_DIRECTIVE) ocsp_dir = aug.get(ocsp_path) # there is NSSOCSP directive in nss.conf file, comment it # otherwise just do nothing if ocsp_dir is not None: ocsp_state = aug.get(ocsp_arg) aug.remove(ocsp_arg) aug.rename(ocsp_path, '#comment') aug.set(ocsp_comment, '{} {}'.format(OCSP_DIRECTIVE, ocsp_state)) aug.save() def set_mod_nss_cipher_suite(self): ciphers = ','.join(NSS_CIPHER_SUITE) installutils.set_directive(paths.HTTPD_NSS_CONF, 'NSSCipherSuite', ciphers, False) def __set_mod_nss_passwordfile(self): installutils.set_directive(paths.HTTPD_NSS_CONF, 'NSSPassPhraseDialog', 'file:' + paths.HTTPD_PASSWORD_CONF) def __add_include(self): """This should run after __set_mod_nss_port so is already backed up""" if installutils.update_file(paths.HTTPD_NSS_CONF, '', 'Include {path}\n'.format(path=paths.HTTPD_IPA_REWRITE_CONF)) != 0: print("Adding Include conf.d/ipa-rewrite to %s failed." % paths.HTTPD_NSS_CONF) def configure_certmonger_renewal_guard(self): certmonger = services.knownservices.certmonger certmonger_stopped = not certmonger.is_running() if certmonger_stopped: certmonger.start() try: 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') helper = ca_iface.Get('org.fedorahosted.certmonger.ca', 'external-helper') if helper: args = shlex.split(helper) if args[0] != paths.IPA_SERVER_GUARD: self.backup_state('certmonger_ipa_helper', helper) args = [paths.IPA_SERVER_GUARD] + args helper = ' '.join(pipes.quote(a) for a in args) ca_iface.Set('org.fedorahosted.certmonger.ca', 'external-helper', helper) finally: if certmonger_stopped: certmonger.stop() def create_password_conf(self): """ This is the format of mod_nss pin files. """ pwd_conf = paths.HTTPD_PASSWORD_CONF ipautil.backup_file(pwd_conf) passwd_fname = os.path.join(paths.HTTPD_ALIAS_DIR, 'pwdfile.txt') with open(passwd_fname, 'r') as pwdfile: password = pwdfile.read() with open(pwd_conf, "w") as f: f.write("internal:") f.write(password) f.write("\nNSS FIPS 140-2 Certificate DB:") f.write(password) # make sure other processes can access the file contents ASAP f.flush() pent = pwd.getpwnam(constants.HTTPD_USER) os.chown(pwd_conf, pent.pw_uid, pent.pw_gid) os.chmod(pwd_conf, 0o400) def disable_system_trust(self): name = 'Root Certs' args = [paths.MODUTIL, '-dbdir', paths.HTTPD_ALIAS_DIR, '-force'] try: result = ipautil.run(args + ['-list', name], env={}, capture_output=True) except ipautil.CalledProcessError as e: if e.returncode == 29: # ERROR: Module not found in database. logger.debug( 'Module %s not available, treating as disabled', name) return False raise if 'Status: Enabled' in result.output: ipautil.run(args + ['-disable', name], env={}) return True return False def __setup_ssl(self): db = certs.CertDB(self.realm, nssdir=paths.HTTPD_ALIAS_DIR, subject_base=self.subject_base, user="root", group=constants.HTTPD_GROUP, create=True) self.disable_system_trust() self.create_password_conf() if self.pkcs12_info: if self.ca_is_configured: trust_flags = IPA_CA_TRUST_FLAGS else: trust_flags = EXTERNAL_CA_TRUST_FLAGS db.init_from_pkcs12(self.pkcs12_info[0], self.pkcs12_info[1], ca_file=self.ca_file, trust_flags=trust_flags) server_certs = db.find_server_certs() if len(server_certs) == 0: raise RuntimeError("Could not find a suitable server cert in import in %s" % self.pkcs12_info[0]) # We only handle one server cert nickname = server_certs[0][0] if nickname == 'ipaCert': nickname = server_certs[1][0] self.cert = db.get_cert_from_db(nickname) if self.ca_is_configured: db.track_server_cert(nickname, self.principal, db.passwd_fname, 'restart_httpd') self.__set_mod_nss_nickname(nickname) self.add_cert_to_service() else: if not self.promote: ca_args = [ paths.CERTMONGER_DOGTAG_SUBMIT, '--ee-url', 'https://%s:8443/ca/ee/ca' % self.fqdn, '--certfile', paths.RA_AGENT_PEM, '--keyfile', paths.RA_AGENT_KEY, '--cafile', paths.IPA_CA_CRT, '--agent-submit' ] helper = " ".join(ca_args) prev_helper = certmonger.modify_ca_helper('IPA', helper) else: prev_helper = None try: certmonger.request_and_wait_for_cert( certpath=db.secdir, nickname=self.cert_nickname, principal=self.principal, passwd_fname=db.passwd_fname, subject=str(DN(('CN', self.fqdn), self.subject_base)), ca='IPA', profile=dogtag.DEFAULT_PROFILE, dns=[self.fqdn], post_command='restart_httpd') finally: if prev_helper is not None: certmonger.modify_ca_helper('IPA', prev_helper) self.cert = db.get_cert_from_db(self.cert_nickname) if prev_helper is not None: self.add_cert_to_service() # Verify we have a valid server cert server_certs = db.find_server_certs() if not server_certs: raise RuntimeError("Could not find a suitable server cert.") # store the CA cert nickname so that we can publish it later on self.cacert_nickname = db.cacert_name def __import_ca_certs(self): db = certs.CertDB(self.realm, nssdir=paths.HTTPD_ALIAS_DIR, subject_base=self.subject_base) self.import_ca_certs(db, self.ca_is_configured) def __publish_ca_cert(self): ca_db = certs.CertDB(self.realm, nssdir=paths.HTTPD_ALIAS_DIR, subject_base=self.subject_base) ca_db.export_pem_cert(self.cacert_nickname, paths.CA_CRT) def is_kdcproxy_configured(self): """Check if KDC proxy has already been configured in the past""" return os.path.isfile(paths.HTTPD_IPA_KDCPROXY_CONF) def enable_kdcproxy(self): """Add ipaConfigString=kdcProxyEnabled to cn=KDC""" service.set_service_entry_config( 'KDC', self.fqdn, [u'kdcProxyEnabled'], self.suffix) 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( os.path.join(paths.USR_SHARE_IPA_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, 0o644) def enable_and_start_oddjobd(self): oddjobd = services.service('oddjobd', api) self.sstore.backup_state('oddjobd', 'running', oddjobd.is_running()) self.sstore.backup_state('oddjobd', 'enabled', oddjobd.is_enabled()) try: oddjobd.enable() oddjobd.start() except Exception as e: logger.critical("Unable to start oddjobd: %s", str(e)) def update_httpd_service_ipa_conf(self): tasks.configure_httpd_service_ipa_conf() def uninstall(self): if self.is_configured(): self.print_msg("Unconfiguring web server") running = self.restore_state("running") enabled = self.restore_state("enabled") # Restore oddjobd to its original state oddjobd = services.service('oddjobd', api) if not self.sstore.restore_state('oddjobd', 'running'): try: oddjobd.stop() except Exception: pass if not self.sstore.restore_state('oddjobd', 'enabled'): try: oddjobd.disable() except Exception: pass 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) db = certs.CertDB(self.realm, paths.HTTPD_ALIAS_DIR) db.restore() for f in [paths.HTTPD_IPA_CONF, paths.HTTPD_SSL_CONF, paths.HTTPD_NSS_CONF]: try: self.fstore.restore_file(f) except ValueError as error: logger.debug("%s", error) installutils.remove_keytab(self.keytab) installutils.remove_file(paths.HTTP_CCACHE) # 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) tasks.remove_httpd_service_ipa_conf() # Restore SELinux boolean states boolean_states = {name: self.restore_state(name) for name in constants.SELINUX_BOOLEAN_HTTPD} 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, nssdir=paths.HTTPD_ALIAS_DIR) db.untrack_server_cert(self.cert_nickname) def start_tracking_certificates(self): db = certs.CertDB(self.realm, nssdir=paths.HTTPD_ALIAS_DIR) db.track_server_cert(self.cert_nickname, self.principal, db.passwd_fname, 'restart_httpd') def request_service_keytab(self): super(HTTPInstance, self).request_service_keytab() if self.master_fqdn is not None: service_dn = DN(('krbprincipalname', self.principal), api.env.container_service, self.suffix) ldap_uri = ipaldap.get_ldap_uri(self.master_fqdn) with ipaldap.LDAPClient(ldap_uri, start_tls=not self.promote, cacert=paths.IPA_CA_CRT) as remote_ldap: if self.promote: remote_ldap.gssapi_bind() else: remote_ldap.simple_bind(ipaldap.DIRMAN_DN, self.dm_password) replication.wait_for_entry(remote_ldap, service_dn, timeout=60)