summaryrefslogtreecommitdiffstats
path: root/ipaserver/install/httpinstance.py
blob: 5c35b5cd2728a56e7c81315392b758f69c1375ae (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
# Authors: Rob Crittenden <rcritten@redhat.com>
#
# 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 <http://www.gnu.org/licenses/>.
#

import os
import os.path
import tempfile
from ipapython.ipa_log_manager import *
import pwd
import shutil

import service
import certs
import dsinstance
import installutils
from ipapython import sysrestore
from ipapython import ipautil
from ipapython import services as ipaservices
from ipapython import dogtag
from ipalib import util, api

HTTPD_DIR = "/etc/httpd"
SSL_CONF = HTTPD_DIR + "/conf.d/ssl.conf"
NSS_CONF = HTTPD_DIR + "/conf.d/nss.conf"

selinux_warning = """
WARNING: could not set selinux boolean(s) %(var)s to true.  The web
interface may not function correctly until this boolean is successfully
change with the command:
   /usr/sbin/setsebool -P %(var)s true
Try updating the policycoreutils and selinux-policy packages.
"""

class WebGuiInstance(service.SimpleServiceInstance):
    def __init__(self):
        service.SimpleServiceInstance.__init__(self, "ipa_webgui")

class HTTPInstance(service.Service):
    def __init__(self, fstore = None):
        service.Service.__init__(self, "httpd", service_desc="the web interface")
        if fstore:
            self.fstore = fstore
        else:
            self.fstore = sysrestore.FileStore('/var/lib/ipa/sysrestore')

    subject_base = ipautil.dn_attribute_property('_subject_base')

    def create_instance(self, realm, fqdn, domain_name, dm_password=None, autoconfig=True, pkcs12_info=None, self_signed_ca=False, subject_base=None, auto_redirect=True):
        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.self_signed_ca = self_signed_ca
        self.principal = "HTTP/%s@%s" % (self.fqdn, self.realm)
        self.dercert = 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=dogtag.install_constants.CRL_PUBLISH_PATH,
        )

        # get a connection to the DS
        self.ldap_connect()


        self.step("disabling mod_ssl in httpd", self.__disable_mod_ssl)
        self.step("setting mod_nss port to 443", self.__set_mod_nss_port)
        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("adding URL rewriting rules", self.__add_include)
        self.step("configuring httpd", self.__configure_http)
        self.step("setting up ssl", self.__setup_ssl)
        if autoconfig:
            self.step("setting up browser autoconfig", self.__setup_autoconfig)
        self.step("publish CA cert", self.__publish_ca_cert)
        self.step("creating a keytab for httpd", self.__create_http_keytab)
        self.step("clean up any existing httpd ccache", self.remove_httpd_ccache)
        self.step("configuring SELinux for httpd", self.configure_selinux_for_httpd)
        self.step("restarting httpd", self.__start)
        self.step("configuring httpd to start on boot", self.__enable)

        self.start_creation(runtime=60)

    def __start(self):
        self.backup_state("running", self.is_running())
        self.restart()

    def __enable(self):
        self.backup_state("enabled", self.is_running())
        # 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, self.dm_password, self.suffix)

    def configure_selinux_for_httpd(self):
        def get_setsebool_args(changes):
            if len(changes) == 1:
                # workaround https://bugzilla.redhat.com/show_bug.cgi?id=825163
                updates = changes.items()[0]
            else:
                updates = ["%s=%s" % update for update in changes.iteritems()]

            args = ["/usr/sbin/setsebool", "-P"]
            args.extend(updates)

            return args

        selinux = False
        try:
            if (os.path.exists('/usr/sbin/selinuxenabled')):
                ipautil.run(["/usr/sbin/selinuxenabled"])
                selinux = True
        except ipautil.CalledProcessError:
            # selinuxenabled returns 1 if not enabled
            pass

        if selinux:
            # Don't assume all vars are available
            updated_vars = {}
            failed_vars = {}
            required_settings = (("httpd_can_network_connect", "on"),
                                 ("httpd_manage_ipa", "on"))
            for setting, state in required_settings:
                try:
                    (stdout, stderr, returncode) = ipautil.run(["/usr/sbin/getsebool", setting])
                    original_state = stdout.split()[2]
                    self.backup_state(setting, original_state)

                    if original_state != state:
                        updated_vars[setting] = state
                except ipautil.CalledProcessError, e:
                    root_logger.debug("Cannot get SELinux boolean '%s': %s", setting, e)
                    failed_vars[setting] = state

            # Allow apache to connect to the dogtag UI and the session cache
            # This can still fail even if selinux is enabled. Execute these
            # together so it is speedier.
            if updated_vars:
                args = get_setsebool_args(updated_vars)
                try:
                    ipautil.run(args)
                except ipautil.CalledProcessError:
                    failed_vars.update(updated_vars)

            if failed_vars:
                args = get_setsebool_args(failed_vars)
                names = [update[0] for update in updated_vars]
                message = ['WARNING: could not set the following SELinux boolean(s):']
                for update in failed_vars.iteritems():
                    message.append('  %s -> %s' % update)
                message.append('The web interface may not function correctly until the booleans')
                message.append('are successfully changed with the command:')
                message.append(' '.join(args))
                message.append('Try updating the policycoreutils and selinux-policy packages.')

                self.print_msg("\n".join(message))

    def __create_http_keytab(self):
        installutils.kadmin_addprinc(self.principal)
        installutils.create_keytab("/etc/httpd/conf/ipa.keytab", self.principal)
        self.move_service(self.principal)
        self.add_cert_to_service()

        pent = pwd.getpwnam("apache")
        os.chown("/etc/httpd/conf/ipa.keytab", pent.pw_uid, pent.pw_gid)

    def remove_httpd_ccache(self):
        # Clean up existing ccache
        pent = pwd.getpwnam("apache")
        installutils.remove_file('/tmp/krb5cc_%d' % pent.pw_uid)

    def __configure_http(self):
        target_fname = '/etc/httpd/conf.d/ipa.conf'
        http_txt = ipautil.template_file(ipautil.SHARE_DIR + "ipa.conf", self.sub_dict)
        self.fstore.backup_file("/etc/httpd/conf.d/ipa.conf")
        http_fd = open(target_fname, "w")
        http_fd.write(http_txt)
        http_fd.close()
        os.chmod(target_fname, 0644)

        target_fname = '/etc/httpd/conf.d/ipa-rewrite.conf'
        http_txt = ipautil.template_file(ipautil.SHARE_DIR + "ipa-rewrite.conf", self.sub_dict)
        self.fstore.backup_file("/etc/httpd/conf.d/ipa-rewrite.conf")
        http_fd = open(target_fname, "w")
        http_fd.write(http_txt)
        http_fd.close()
        os.chmod(target_fname, 0644)

    def __disable_mod_ssl(self):
        if os.path.exists(SSL_CONF):
            self.fstore.backup_file(SSL_CONF)
            os.unlink(SSL_CONF)

    def __set_mod_nss_port(self):
        self.fstore.backup_file(NSS_CONF)
        if installutils.update_file(NSS_CONF, '8443', '443') != 0:
            print "Updating port in %s failed." % NSS_CONF

    def __set_mod_nss_nickname(self, nickname):
        installutils.set_directive(NSS_CONF, 'NSSNickname', nickname)

    def enable_mod_nss_renegotiate(self):
        installutils.set_directive(NSS_CONF, 'NSSRenegotiation', 'on', False)
        installutils.set_directive(NSS_CONF, 'NSSRequireSafeNegotiation', 'on', False)

    def __set_mod_nss_passwordfile(self):
        installutils.set_directive(NSS_CONF, 'NSSPassPhraseDialog', 'file:/etc/httpd/conf/password.conf')

    def __add_include(self):
        """This should run after __set_mod_nss_port so is already backed up"""
        if installutils.update_file(NSS_CONF, '</VirtualHost>', 'Include conf.d/ipa-rewrite.conf\n</VirtualHost>') != 0:
            print "Adding Include conf.d/ipa-rewrite to %s failed." % NSS_CONF

    def __setup_ssl(self):
        fqdn = None
        if not self.self_signed_ca:
            fqdn = self.fqdn

        ca_db = certs.CertDB(self.realm, host_name=fqdn, subject_base=self.subject_base)

        db = certs.CertDB(self.realm, subject_base=self.subject_base)
        if self.pkcs12_info:
            db.create_from_pkcs12(self.pkcs12_info[0], self.pkcs12_info[1], passwd=None)
            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])

            db.create_password_conf()
            # We only handle one server cert
            nickname = server_certs[0][0]
            self.dercert = db.get_cert_from_db(nickname, pem=False)
            db.track_server_cert(nickname, self.principal, db.passwd_fname, 'restart_httpd')

            self.__set_mod_nss_nickname(nickname)
        else:
            if self.self_signed_ca:
                db.create_from_cacert(ca_db.cacert_fname)

            db.create_password_conf()
            self.dercert = db.create_server_cert("Server-Cert", self.fqdn, ca_db)
            db.track_server_cert("Server-Cert", self.principal, db.passwd_fname, 'restart_httpd')
            db.create_signing_cert("Signing-Cert", "Object Signing Cert", ca_db)

        # Fix the database permissions
        os.chmod(certs.NSS_DIR + "/cert8.db", 0660)
        os.chmod(certs.NSS_DIR + "/key3.db", 0660)
        os.chmod(certs.NSS_DIR + "/secmod.db", 0660)
        os.chmod(certs.NSS_DIR + "/pwdfile.txt", 0660)

        pent = pwd.getpwnam("apache")
        os.chown(certs.NSS_DIR + "/cert8.db", 0, pent.pw_gid )
        os.chown(certs.NSS_DIR + "/key3.db", 0, pent.pw_gid )
        os.chown(certs.NSS_DIR + "/secmod.db", 0, pent.pw_gid )
        os.chown(certs.NSS_DIR + "/pwdfile.txt", 0, pent.pw_gid )

        # Fix SELinux permissions on the database
        ipaservices.restore_context(certs.NSS_DIR + "/cert8.db")
        ipaservices.restore_context(certs.NSS_DIR + "/key3.db")

        # In case this got generated as part of the install, reset the
        # context
        if ipautil.file_exists(certs.CA_SERIALNO):
            ipaservices.restore_context(certs.CA_SERIALNO)
            os.chown(certs.CA_SERIALNO, 0, pent.pw_gid)
            os.chmod(certs.CA_SERIALNO, 0664)

    def __setup_autoconfig(self):
        target_fname = '/usr/share/ipa/html/preferences.html'
        ipautil.copy_template_file(
            ipautil.SHARE_DIR + "preferences.html.template",
            target_fname, self.sub_dict)
        os.chmod(target_fname, 0644)

        # The signing cert is generated in __setup_ssl
        db = certs.CertDB(self.realm, subject_base=self.subject_base)
        with open(db.passwd_fname) as pwdfile:
            pwd = pwdfile.read()

        # Setup configure.jar
        tmpdir = tempfile.mkdtemp(prefix="tmp-")
        target_fname = '/usr/share/ipa/html/configure.jar'
        shutil.copy("/usr/share/ipa/html/preferences.html", tmpdir)
        db.run_signtool(["-k", "Signing-Cert",
                         "-Z", target_fname,
                         "-e", ".html", "-p", pwd,
                         tmpdir])
        shutil.rmtree(tmpdir)
        os.chmod(target_fname, 0644)

        self.setup_firefox_extension(self.realm, self.domain, force=True)

    def setup_firefox_extension(self, realm, domain, force=False):
        """Set up the signed browser configuration extension

        If the extension is already set up, skip the installation unless
        ``force`` is true.
        """

        target_fname = '/usr/share/ipa/html/krb.js'
        if os.path.exists(target_fname) and not force:
            root_logger.info(
                '%s exists, skipping install of Firefox extension',
                    target_fname)
            return

        sub_dict = dict(REALM=realm, DOMAIN=domain)
        db = certs.CertDB(realm)
        with open(db.passwd_fname) as pwdfile:
            pwd = pwdfile.read()

        ipautil.copy_template_file(ipautil.SHARE_DIR + "krb.js.template",
            target_fname, sub_dict)
        os.chmod(target_fname, 0644)

        # Setup extension
        tmpdir = tempfile.mkdtemp(prefix="tmp-")
        extdir = tmpdir + "/ext"
        target_fname = "/usr/share/ipa/html/kerberosauth.xpi"
        shutil.copytree("/usr/share/ipa/ffextension", extdir)
        if db.has_nickname('Signing-Cert'):
            db.run_signtool(["-k", "Signing-Cert",
                                "-p", pwd,
                                "-X", "-Z", target_fname,
                                extdir])
        else:
            root_logger.warning('Object-signing certificate was not found. '
                'Creating unsigned Firefox configuration extension.')
            filenames = os.listdir(extdir)
            ipautil.run(['/usr/bin/zip', '-r', target_fname] + filenames,
                cwd=extdir)
        shutil.rmtree(tmpdir)
        os.chmod(target_fname, 0644)

    def __publish_ca_cert(self):
        ca_db = certs.CertDB(self.realm)
        ca_db.publish_ca_cert("/usr/share/ipa/html/ca.crt")

    def uninstall(self):
        if self.is_configured():
            self.print_msg("Unconfiguring web server")

        running = self.restore_state("running")
        enabled = self.restore_state("enabled")

        if not running is None:
            self.stop()

        db = certs.CertDB(api.env.realm)
        db.untrack_server_cert("Server-Cert")
        if not enabled is None and not enabled:
            self.disable()

        for f in ["/etc/httpd/conf.d/ipa.conf", SSL_CONF, NSS_CONF]:
            try:
                self.fstore.restore_file(f)
            except ValueError, error:
                root_logger.debug(error)
                pass

        # Remove the configuration files we create
        installutils.remove_file("/etc/httpd/conf.d/ipa-rewrite.conf")
        installutils.remove_file("/etc/httpd/conf.d/ipa.conf")
        installutils.remove_file("/etc/httpd/conf.d/ipa-pki-proxy.conf")

        for var in ["httpd_can_network_connect", "httpd_manage_ipa"]:
            sebool_state = self.restore_state(var)
            if not sebool_state is None:
                try:
                    ipautil.run(["/usr/sbin/setsebool", "-P", var, sebool_state])
                except ipautil.CalledProcessError, e:
                    self.print_msg("Cannot restore SELinux boolean '%s' back to '%s': %s" \
                            % (var, sebool_state, e))

        if not running is None and running:
            self.start()