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0c4a91348a
When ipa-server-certinstall is called to install a new server certificate, the prerequisite is that the certificate issuer must be already known by IPA. This fix adds new checks to make sure that the tool exits before modifying the target NSS database if it is not the case. The fix consists in creating a temp NSS database with the CA certs from the target NSS database + the new server cert and checking the new server cert validity. https://fedorahosted.org/freeipa/ticket/6263 Reviewed-By: Jan Cholasta <jcholast@redhat.com>
234 lines
8.9 KiB
Python
234 lines
8.9 KiB
Python
# Authors: Karl MacMillan <kmacmillan@mentalrootkit.com>
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# Jan Cholasta <jcholast@redhat.com>
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#
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# Copyright (C) 2007-2013 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 pwd
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import optparse
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from ipaplatform.constants import constants
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from ipaplatform.paths import paths
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from ipapython import admintool, ipautil
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from ipapython.certdb import get_ca_nickname, NSSDatabase
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from ipapython.dn import DN
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from ipalib import api, errors
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from ipalib.constants import CACERT
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from ipaserver.install import certs, dsinstance, installutils
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class ServerCertInstall(admintool.AdminTool):
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command_name = 'ipa-server-certinstall'
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usage = "%prog <-d|-w> [options] <file> ..."
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description = "Install new SSL server certificates."
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@classmethod
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def add_options(cls, parser):
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super(ServerCertInstall, cls).add_options(parser)
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parser.add_option(
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"-d", "--dirsrv",
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dest="dirsrv", action="store_true", default=False,
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help="install certificate for the directory server")
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parser.add_option(
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"-w", "--http",
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dest="http", action="store_true", default=False,
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help="install certificate for the http server")
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parser.add_option(
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"--pin",
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dest="pin", metavar="PIN", sensitive=True,
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help="The password of the PKCS#12 file")
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parser.add_option(
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"--dirsrv_pin", "--http_pin",
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dest="pin",
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help=optparse.SUPPRESS_HELP)
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parser.add_option(
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"--cert-name",
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dest="cert_name", metavar="NAME",
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help="Name of the certificate to install")
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parser.add_option(
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"-p", "--dirman-password",
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dest="dirman_password",
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help="Directory Manager password")
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def validate_options(self):
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super(ServerCertInstall, self).validate_options(needs_root=True)
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installutils.check_server_configuration()
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if not self.options.dirsrv and not self.options.http:
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self.option_parser.error("you must specify dirsrv and/or http")
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if not self.args:
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self.option_parser.error("you must provide certificate filename")
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def ask_for_options(self):
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super(ServerCertInstall, self).ask_for_options()
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if not self.options.dirman_password:
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self.options.dirman_password = installutils.read_password(
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"Directory Manager", confirm=False, validate=False, retry=False)
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if self.options.dirman_password is None:
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raise admintool.ScriptError(
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"Directory Manager password required")
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if self.options.pin is None:
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self.options.pin = installutils.read_password(
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"Enter private key unlock",
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confirm=False, validate=False, retry=False)
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if self.options.pin is None:
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raise admintool.ScriptError(
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"Private key unlock password required")
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def run(self):
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api.bootstrap(in_server=True)
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api.finalize()
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conn = api.Backend.ldap2
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conn.connect(bind_dn=DN(('cn', 'directory manager')),
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bind_pw=self.options.dirman_password)
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if self.options.dirsrv:
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self.install_dirsrv_cert()
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if self.options.http:
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self.install_http_cert()
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conn.disconnect()
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def install_dirsrv_cert(self):
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serverid = installutils.realm_to_serverid(api.env.realm)
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dirname = dsinstance.config_dirname(serverid)
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conn = api.Backend.ldap2
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entry = conn.get_entry(DN(('cn', 'RSA'), ('cn', 'encryption'),
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('cn', 'config')),
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['nssslpersonalityssl'])
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old_cert = entry.single_value['nssslpersonalityssl']
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server_cert = self.import_cert(dirname, self.options.pin,
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old_cert, 'ldap/%s' % api.env.host,
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'restart_dirsrv %s' % serverid)
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entry['nssslpersonalityssl'] = [server_cert]
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try:
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conn.update_entry(entry)
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except errors.EmptyModlist:
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pass
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def install_http_cert(self):
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dirname = certs.NSS_DIR
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old_cert = installutils.get_directive(paths.HTTPD_NSS_CONF,
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'NSSNickname')
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server_cert = self.import_cert(dirname, self.options.pin,
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old_cert, 'HTTP/%s' % api.env.host,
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'restart_httpd')
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installutils.set_directive(paths.HTTPD_NSS_CONF,
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'NSSNickname', server_cert)
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# Fix the database permissions
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os.chmod(os.path.join(dirname, 'cert8.db'), 0o640)
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os.chmod(os.path.join(dirname, 'key3.db'), 0o640)
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os.chmod(os.path.join(dirname, 'secmod.db'), 0o640)
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pent = pwd.getpwnam(constants.HTTPD_USER)
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os.chown(os.path.join(dirname, 'cert8.db'), 0, pent.pw_gid)
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os.chown(os.path.join(dirname, 'key3.db'), 0, pent.pw_gid)
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os.chown(os.path.join(dirname, 'secmod.db'), 0, pent.pw_gid)
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def check_chain(self, pkcs12_filename, pkcs12_pin, nssdb):
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# create a temp nssdb
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with NSSDatabase() as tempnssdb:
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db_password = ipautil.ipa_generate_password()
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db_pwdfile = ipautil.write_tmp_file(db_password)
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tempnssdb.create_db(db_pwdfile.name)
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# import the PKCS12 file, then delete all CA certificates
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# this leaves only the server certs in the temp db
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tempnssdb.import_pkcs12(
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pkcs12_filename, db_pwdfile.name, pkcs12_pin)
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for nickname, flags in tempnssdb.list_certs():
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if 'u' not in flags:
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while tempnssdb.has_nickname(nickname):
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tempnssdb.delete_cert(nickname)
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# import all the CA certs from nssdb into the temp db
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for nickname, flags in nssdb.list_certs():
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if 'u' not in flags:
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cert = nssdb.get_cert_from_db(nickname)
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tempnssdb.add_cert(cert, nickname, flags)
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# now get the server certs from tempnssdb and check their validity
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try:
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for nick, flags in tempnssdb.find_server_certs():
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tempnssdb.verify_server_cert_validity(nick, api.env.host)
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except ValueError as e:
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raise admintool.ScriptError(
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"Peer's certificate issuer is not trusted (%s). "
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"Please run ipa-cacert-manage install and ipa-certupdate "
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"to install the CA certificate." % str(e))
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def import_cert(self, dirname, pkcs12_passwd, old_cert, principal, command):
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pkcs12_file, pin, ca_cert = installutils.load_pkcs12(
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cert_files=self.args,
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key_password=pkcs12_passwd,
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key_nickname=self.options.cert_name,
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ca_cert_files=[CACERT],
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host_name=api.env.host)
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dirname = os.path.normpath(dirname)
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cdb = certs.CertDB(api.env.realm, nssdir=dirname)
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# Check that the ca_cert is known and trusted
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self.check_chain(pkcs12_file.name, pin, cdb)
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try:
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ca_enabled = api.Command.ca_is_enabled()['result']
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if ca_enabled:
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cdb.untrack_server_cert(old_cert)
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cdb.delete_cert(old_cert)
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prevs = cdb.find_server_certs()
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cdb.import_pkcs12(pkcs12_file.name, pin)
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news = cdb.find_server_certs()
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server_certs = [item for item in news if item not in prevs]
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server_cert = server_certs[0][0]
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if ca_enabled:
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# Start tracking only if the cert was issued by IPA CA
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# Retrieve IPA CA
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ipa_ca_cert = cdb.get_cert_from_db(
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get_ca_nickname(api.env.realm),
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pem=False)
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# And compare with the CA which signed this certificate
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if ca_cert == ipa_ca_cert:
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cdb.track_server_cert(server_cert,
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principal,
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cdb.passwd_fname,
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command)
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except RuntimeError as e:
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raise admintool.ScriptError(str(e))
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return server_cert
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