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cdb94e0ff2
When creating ipa-client-samba tool, few common routines from the server installer code became useful for the client code as well. Move them to ipapython.ipautil and update references as well. Fixes: https://pagure.io/freeipa/issue/3999 Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com> Reviewed-By: Rob Crittenden <rcritten@redhat.com> Reviewed-By: Christian Heimes <cheimes@redhat.com>
321 lines
12 KiB
Python
321 lines
12 KiB
Python
# Copyright (C) 2015 FreeIPa Project Contributors, see 'COPYING' for license.
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from __future__ import print_function, absolute_import
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import enum
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import logging
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from ipalib import api
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from ipaserver.secrets.kem import IPAKEMKeys, KEMLdap
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from ipaserver.secrets.client import CustodiaClient
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from ipaplatform.paths import paths
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from ipaplatform.constants import constants
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from ipaserver.install.service import SimpleServiceInstance
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from ipapython import ipautil
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from ipapython import ipaldap
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from ipapython.certdb import NSSDatabase
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from ipaserver.install import ldapupdate
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from ipaserver.install import sysupgrade
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from base64 import b64decode
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from jwcrypto.common import json_decode
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import os
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import stat
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import time
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import pwd
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logger = logging.getLogger(__name__)
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class CustodiaModes(enum.Enum):
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# peer must have a CA
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CA_PEER = 'Custodia CA peer'
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# peer must have a CA, KRA preferred
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KRA_PEER = 'Custodia KRA peer'
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# any master will do
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MASTER_PEER = 'Custodia master peer'
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# local instance (first master)
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FIRST_MASTER = 'Custodia on first master'
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def get_custodia_instance(config, mode):
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"""Create Custodia instance
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:param config: configuration/installer object
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:param mode: CustodiaModes member
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:return: CustodiaInstance object
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The config object must have the following attribute
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*host_name*
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FQDN of the new replica/master
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*realm_name*
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Kerberos realm
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*master_host_name* (for *CustodiaModes.MASTER_PEER*)
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hostname of a master (may not have a CA)
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*ca_host_name* (for *CustodiaModes.CA_PEER*)
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hostname of a master with CA
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*kra_host_name* (for *CustodiaModes.KRA_PEER*)
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hostname of a master with KRA or CA
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For replicas, the instance will upload new keys and retrieve secrets
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to the same host. Therefore it uses *ca_host_name* instead of
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*master_host_name* to create a replica with CA.
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"""
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assert isinstance(mode, CustodiaModes)
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logger.debug(
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"Custodia client for '%r' with promotion %s.",
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mode, 'yes' if mode != CustodiaModes.FIRST_MASTER else 'no'
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)
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if mode == CustodiaModes.CA_PEER:
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# In case we install replica with CA, prefer CA host as source for
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# all Custodia secret material.
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custodia_peer = config.ca_host_name
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elif mode == CustodiaModes.KRA_PEER:
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custodia_peer = config.kra_host_name
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elif mode == CustodiaModes.MASTER_PEER:
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custodia_peer = config.master_host_name
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elif mode == CustodiaModes.FIRST_MASTER:
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custodia_peer = None
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else:
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raise RuntimeError("Unknown custodia mode %s" % mode)
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if custodia_peer is None:
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# use ldapi with local dirsrv instance
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logger.debug("Custodia uses LDAPI.")
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else:
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logger.info("Custodia uses '%s' as master peer.", custodia_peer)
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return CustodiaInstance(
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host_name=config.host_name,
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realm=config.realm_name,
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custodia_peer=custodia_peer
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)
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class CustodiaInstance(SimpleServiceInstance):
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def __init__(self, host_name=None, realm=None, custodia_peer=None):
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super(CustodiaInstance, self).__init__("ipa-custodia")
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self.config_file = paths.IPA_CUSTODIA_CONF
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self.server_keys = paths.IPA_CUSTODIA_KEYS
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self.custodia_peer = custodia_peer
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self.fqdn = host_name
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self.realm = realm
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@property
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def ldap_uri(self):
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if self.custodia_peer is None:
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return ipaldap.realm_to_ldapi_uri(self.realm)
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else:
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return "ldap://{}".format(self.custodia_peer)
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def __config_file(self):
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template_file = os.path.basename(self.config_file) + '.template'
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template = os.path.join(paths.USR_SHARE_IPA_DIR, template_file)
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httpd_info = pwd.getpwnam(constants.HTTPD_USER)
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sub_dict = dict(
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IPA_CUSTODIA_CONF_DIR=paths.IPA_CUSTODIA_CONF_DIR,
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IPA_CUSTODIA_KEYS=paths.IPA_CUSTODIA_KEYS,
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IPA_CUSTODIA_SOCKET=paths.IPA_CUSTODIA_SOCKET,
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IPA_CUSTODIA_AUDIT_LOG=paths.IPA_CUSTODIA_AUDIT_LOG,
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LDAP_URI=ipaldap.realm_to_ldapi_uri(self.realm),
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UID=httpd_info.pw_uid,
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GID=httpd_info.pw_gid
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)
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conf = ipautil.template_file(template, sub_dict)
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with open(self.config_file, "w") as f:
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f.write(conf)
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ipautil.flush_sync(f)
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def create_instance(self):
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if self.ldap_uri.startswith('ldapi://'):
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# local case, ensure container exists
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self.step("Making sure custodia container exists",
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self.__create_container)
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self.step("Generating ipa-custodia config file", self.__config_file)
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self.step("Generating ipa-custodia keys", self.__gen_keys)
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super(CustodiaInstance, self).create_instance(
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gensvc_name='KEYS',
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fqdn=self.fqdn,
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ldap_suffix=ipautil.realm_to_suffix(self.realm),
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realm=self.realm
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)
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sysupgrade.set_upgrade_state('custodia', 'installed', True)
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def uninstall(self):
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super(CustodiaInstance, self).uninstall()
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keystore = IPAKEMKeys({
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'server_keys': self.server_keys,
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'ldap_uri': self.ldap_uri
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})
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keystore.remove_server_keys_file()
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ipautil.remove_file(self.config_file)
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sysupgrade.set_upgrade_state('custodia', 'installed', False)
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def __gen_keys(self):
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keystore = IPAKEMKeys({
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'server_keys': self.server_keys,
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'ldap_uri': self.ldap_uri
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})
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keystore.generate_server_keys()
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def upgrade_instance(self):
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installed = sysupgrade.get_upgrade_state("custodia", "installed")
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if installed:
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if (not os.path.isfile(self.server_keys)
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or not os.path.isfile(self.config_file)):
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logger.warning(
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"Custodia server keys or config are missing, forcing "
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"reinstallation of ipa-custodia."
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)
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installed = False
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if not installed:
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logger.info("Custodia service is being configured")
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self.create_instance()
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else:
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old_config = open(self.config_file).read()
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self.__config_file()
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new_config = open(self.config_file).read()
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if new_config != old_config:
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logger.info("Restarting Custodia")
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self.restart()
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mode = os.stat(self.server_keys).st_mode
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if stat.S_IMODE(mode) != 0o600:
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logger.info("Secure server.keys mode")
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os.chmod(self.server_keys, 0o600)
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def __create_container(self):
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"""
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Runs the custodia update file to ensure custodia container is present.
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"""
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sub_dict = {
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'SUFFIX': self.suffix,
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}
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updater = ldapupdate.LDAPUpdate(sub_dict=sub_dict)
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updater.update([os.path.join(paths.UPDATES_DIR, '73-custodia.update')])
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def import_ra_key(self):
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cli = self._get_custodia_client()
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# please note that ipaCert part has to stay here for historical
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# reasons (old servers expect you to ask for ra/ipaCert during
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# replication as they store the RA agent cert in an NSS database
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# with this nickname)
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cli.fetch_key('ra/ipaCert')
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def import_dm_password(self):
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cli = self._get_custodia_client()
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cli.fetch_key('dm/DMHash')
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def _wait_keys(self):
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timeout = api.env.replication_wait_timeout
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deadline = int(time.time()) + timeout
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logger.debug("Waiting up to %s seconds to see our keys "
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"appear on host %s", timeout, self.ldap_uri)
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konn = KEMLdap(self.ldap_uri)
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saved_e = None
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while True:
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try:
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return konn.check_host_keys(self.fqdn)
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except Exception as e:
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# Print message to console only once for first error.
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if saved_e is None:
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# FIXME: Change once there's better way to show this
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# message in installer output,
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print(
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" Waiting for keys to appear on host: {}, please "
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"wait until this has completed.".format(
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self.ldap_uri)
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)
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# log only once for the same error
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if not isinstance(e, type(saved_e)):
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logger.debug(
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"Transient error getting keys: '%s'", e)
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saved_e = e
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if int(time.time()) > deadline:
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raise RuntimeError("Timed out trying to obtain keys.")
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time.sleep(1)
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def _get_custodia_client(self):
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if self.custodia_peer is None:
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raise ValueError("Can't replicate secrets without Custodia peer")
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# Before we attempt to fetch keys from this host, make sure our public
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# keys have been replicated there.
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self._wait_keys()
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return CustodiaClient(
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client_service='host@{}'.format(self.fqdn),
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keyfile=self.server_keys, keytab=paths.KRB5_KEYTAB,
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server=self.custodia_peer, realm=self.realm
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)
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def _get_keys(self, cacerts_file, cacerts_pwd, data):
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# Fetch all needed certs one by one, then combine them in a single
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# PKCS12 file
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prefix = data['prefix']
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certlist = data['list']
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cli = self._get_custodia_client()
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with NSSDatabase(None) as tmpdb:
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tmpdb.create_db()
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# Cert file password
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crtpwfile = os.path.join(tmpdb.secdir, 'crtpwfile')
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with open(crtpwfile, 'w+') as f:
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f.write(cacerts_pwd)
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for nickname in certlist:
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value = cli.fetch_key(os.path.join(prefix, nickname), False)
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v = json_decode(value)
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pk12pwfile = os.path.join(tmpdb.secdir, 'pk12pwfile')
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with open(pk12pwfile, 'w+') as f:
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f.write(v['export password'])
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pk12file = os.path.join(tmpdb.secdir, 'pk12file')
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with open(pk12file, 'wb') as f:
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f.write(b64decode(v['pkcs12 data']))
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tmpdb.run_pk12util([
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'-k', tmpdb.pwd_file,
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'-n', nickname,
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'-i', pk12file,
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'-w', pk12pwfile
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])
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# Add CA certificates
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self.export_ca_certs_nssdb(tmpdb, True)
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# Now that we gathered all certs, re-export
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ipautil.run([
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paths.PKCS12EXPORT,
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'-d', tmpdb.secdir,
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'-p', tmpdb.pwd_file,
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'-w', crtpwfile,
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'-o', cacerts_file
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])
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def get_ca_keys(self, cacerts_file, cacerts_pwd):
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certlist = ['caSigningCert cert-pki-ca',
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'ocspSigningCert cert-pki-ca',
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'auditSigningCert cert-pki-ca',
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'subsystemCert cert-pki-ca']
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data = {'prefix': 'ca',
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'list': certlist}
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self._get_keys(cacerts_file, cacerts_pwd, data)
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def get_kra_keys(self, cacerts_file, cacerts_pwd):
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certlist = ['auditSigningCert cert-pki-kra',
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'storageCert cert-pki-kra',
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'subsystemCert cert-pki-ca',
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'transportCert cert-pki-kra']
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data = {'prefix': 'ca',
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'list': certlist}
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self._get_keys(cacerts_file, cacerts_pwd, data)
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def __start(self):
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super(CustodiaInstance, self).__start()
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def __enable(self):
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super(CustodiaInstance, self).__enable()
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