mirror of
https://salsa.debian.org/freeipa-team/freeipa.git
synced 2024-12-26 17:01:14 -06:00
1f9f84a66d
In complex replication setups a replica may try to obtain CA keys from a host that is not the master we initially create the keys against. In this case race conditions may happen due to replication. So we need to make sure the server we are contacting to get the CA keys has our keys in LDAP. We do this by waiting to positively fetch our encryption public key (the last one we create) from the target host LDAP server. Fixes: https://pagure.io/freeipa/issue/6838 Signed-off-by: Simo Sorce <simo@redhat.com> Reviewed-By: Stanislav Laznicka <slaznick@redhat.com> Reviewed-By: Christian Heimes <cheimes@redhat.com>
224 lines
8.9 KiB
Python
224 lines
8.9 KiB
Python
# Copyright (C) 2015 FreeIPa Project Contributors, see 'COPYING' for license.
|
|
|
|
from ipaserver.secrets.kem import IPAKEMKeys, KEMLdap
|
|
from ipaserver.secrets.client import CustodiaClient
|
|
from ipaplatform.paths import paths
|
|
from ipaplatform.constants import constants
|
|
from ipaserver.install.service import SimpleServiceInstance
|
|
from ipapython import ipautil
|
|
from ipapython.ipa_log_manager import root_logger
|
|
from ipapython.certdb import NSSDatabase
|
|
from ipaserver.install import installutils
|
|
from ipaserver.install import ldapupdate
|
|
from ipaserver.install import sysupgrade
|
|
from base64 import b64decode
|
|
from jwcrypto.common import json_decode
|
|
import functools
|
|
import shutil
|
|
import os
|
|
import stat
|
|
import tempfile
|
|
import time
|
|
import pwd
|
|
|
|
|
|
class CustodiaInstance(SimpleServiceInstance):
|
|
def __init__(self, host_name=None, realm=None):
|
|
super(CustodiaInstance, self).__init__("ipa-custodia")
|
|
self.config_file = paths.IPA_CUSTODIA_CONF
|
|
self.server_keys = os.path.join(paths.IPA_CUSTODIA_CONF_DIR,
|
|
'server.keys')
|
|
self.ldap_uri = None
|
|
self.fqdn = host_name
|
|
self.realm = realm
|
|
self.__CustodiaClient = functools.partial(
|
|
CustodiaClient,
|
|
client_service='host@%s' % self.fqdn,
|
|
keyfile=self.server_keys,
|
|
keytab=paths.KRB5_KEYTAB,
|
|
realm=realm,
|
|
)
|
|
|
|
def __config_file(self):
|
|
template_file = os.path.basename(self.config_file) + '.template'
|
|
template = os.path.join(paths.USR_SHARE_IPA_DIR, template_file)
|
|
httpd_info = pwd.getpwnam(constants.HTTPD_USER)
|
|
sub_dict = dict(IPA_CUSTODIA_CONF_DIR=paths.IPA_CUSTODIA_CONF_DIR,
|
|
IPA_CUSTODIA_SOCKET=paths.IPA_CUSTODIA_SOCKET,
|
|
IPA_CUSTODIA_AUDIT_LOG=paths.IPA_CUSTODIA_AUDIT_LOG,
|
|
LDAP_URI=installutils.realm_to_ldapi_uri(self.realm),
|
|
UID=httpd_info.pw_uid, GID=httpd_info.pw_gid)
|
|
conf = ipautil.template_file(template, sub_dict)
|
|
fd = open(self.config_file, "w+")
|
|
fd.write(conf)
|
|
fd.flush()
|
|
fd.close()
|
|
|
|
def create_instance(self):
|
|
suffix = ipautil.realm_to_suffix(self.realm)
|
|
self.step("Generating ipa-custodia config file", self.__config_file)
|
|
self.step("Making sure custodia container exists", self.__create_container)
|
|
self.step("Generating ipa-custodia keys", self.__gen_keys)
|
|
super(CustodiaInstance, self).create_instance(gensvc_name='KEYS',
|
|
fqdn=self.fqdn,
|
|
ldap_suffix=suffix,
|
|
realm=self.realm)
|
|
sysupgrade.set_upgrade_state('custodia', 'installed', True)
|
|
|
|
def __gen_keys(self):
|
|
KeyStore = IPAKEMKeys({'server_keys': self.server_keys,
|
|
'ldap_uri': self.ldap_uri})
|
|
KeyStore.generate_server_keys()
|
|
|
|
def upgrade_instance(self):
|
|
if not sysupgrade.get_upgrade_state("custodia", "installed"):
|
|
root_logger.info("Custodia service is being configured")
|
|
self.create_instance()
|
|
else:
|
|
old_config = open(self.config_file).read()
|
|
self.__config_file()
|
|
new_config = open(self.config_file).read()
|
|
if new_config != old_config:
|
|
root_logger.info("Restarting Custodia")
|
|
self.restart()
|
|
|
|
mode = os.stat(self.server_keys).st_mode
|
|
if stat.S_IMODE(mode) != 0o600:
|
|
root_logger.info("Secure server.keys mode")
|
|
os.chmod(self.server_keys, 0o600)
|
|
|
|
def create_replica(self, master_host_name):
|
|
suffix = ipautil.realm_to_suffix(self.realm)
|
|
self.ldap_uri = 'ldap://%s' % master_host_name
|
|
self.master_host_name = master_host_name
|
|
|
|
self.step("Generating ipa-custodia config file", self.__config_file)
|
|
self.step("Generating ipa-custodia keys", self.__gen_keys)
|
|
super(CustodiaInstance, self).create_instance(gensvc_name='KEYS',
|
|
fqdn=self.fqdn,
|
|
ldap_suffix=suffix,
|
|
realm=self.realm)
|
|
|
|
def __create_container(self):
|
|
"""
|
|
Runs the custodia update file to ensure custodia container is present.
|
|
"""
|
|
|
|
sub_dict = {
|
|
'SUFFIX': self.suffix,
|
|
}
|
|
|
|
updater = ldapupdate.LDAPUpdate(sub_dict=sub_dict)
|
|
updater.update([os.path.join(paths.UPDATES_DIR, '73-custodia.update')])
|
|
|
|
def import_ra_key(self, master_host_name):
|
|
cli = self.__CustodiaClient(server=master_host_name)
|
|
# please note that ipaCert part has to stay here for historical
|
|
# reasons (old servers expect you to ask for ra/ipaCert during
|
|
# replication as they store the RA agent cert in an NSS database
|
|
# with this nickname)
|
|
cli.fetch_key('ra/ipaCert')
|
|
|
|
def import_dm_password(self, master_host_name):
|
|
cli = self.__CustodiaClient(server=master_host_name)
|
|
cli.fetch_key('dm/DMHash')
|
|
|
|
def __wait_keys(self, host, timeout=300):
|
|
ldap_uri = 'ldap://%s' % host
|
|
deadline = int(time.time()) + timeout
|
|
root_logger.info("Waiting up to {} seconds to see our keys "
|
|
"appear on host: {}".format(timeout, host))
|
|
|
|
konn = KEMLdap(ldap_uri)
|
|
saved_e = None
|
|
while True:
|
|
try:
|
|
return konn.check_host_keys(self.fqdn)
|
|
except Exception as e:
|
|
# log only once for the same error
|
|
if not isinstance(e, type(saved_e)):
|
|
root_logger.debug(
|
|
"Transient error getting keys: '{err}'".format(err=e))
|
|
saved_e = e
|
|
if int(time.time()) > deadline:
|
|
raise RuntimeError("Timed out trying to obtain keys.")
|
|
time.sleep(1)
|
|
|
|
def __get_keys(self, ca_host, cacerts_file, cacerts_pwd, data):
|
|
# Fecth all needed certs one by one, then combine them in a single
|
|
# p12 file
|
|
|
|
prefix = data['prefix']
|
|
certlist = data['list']
|
|
|
|
# Before we attempt to fetch keys from this host, make sure our public
|
|
# keys have been replicated there.
|
|
self.__wait_keys(ca_host)
|
|
|
|
cli = self.__CustodiaClient(server=ca_host)
|
|
|
|
# Temporary nssdb
|
|
tmpnssdir = tempfile.mkdtemp(dir=paths.TMP)
|
|
tmpdb = NSSDatabase(tmpnssdir)
|
|
tmpdb.create_db()
|
|
try:
|
|
# Cert file password
|
|
crtpwfile = os.path.join(tmpnssdir, 'crtpwfile')
|
|
with open(crtpwfile, 'w+') as f:
|
|
f.write(cacerts_pwd)
|
|
f.flush()
|
|
|
|
for nickname in certlist:
|
|
value = cli.fetch_key(os.path.join(prefix, nickname), False)
|
|
v = json_decode(value)
|
|
pk12pwfile = os.path.join(tmpnssdir, 'pk12pwfile')
|
|
with open(pk12pwfile, 'w+') as f:
|
|
f.write(v['export password'])
|
|
pk12file = os.path.join(tmpnssdir, 'pk12file')
|
|
with open(pk12file, 'w+') as f:
|
|
f.write(b64decode(v['pkcs12 data']))
|
|
ipautil.run([paths.PK12UTIL,
|
|
'-d', tmpdb.secdir,
|
|
'-k', tmpdb.pwd_file,
|
|
'-n', nickname,
|
|
'-i', pk12file,
|
|
'-w', pk12pwfile])
|
|
|
|
# Add CA certificates
|
|
self.suffix = ipautil.realm_to_suffix(self.realm)
|
|
self.import_ca_certs(tmpdb, True)
|
|
|
|
# Now that we gathered all certs, re-export
|
|
ipautil.run([paths.PKCS12EXPORT,
|
|
'-d', tmpdb.secdir,
|
|
'-p', tmpdb.pwd_file,
|
|
'-w', crtpwfile,
|
|
'-o', cacerts_file])
|
|
|
|
finally:
|
|
shutil.rmtree(tmpnssdir)
|
|
|
|
def get_ca_keys(self, ca_host, cacerts_file, cacerts_pwd):
|
|
certlist = ['caSigningCert cert-pki-ca',
|
|
'ocspSigningCert cert-pki-ca',
|
|
'auditSigningCert cert-pki-ca',
|
|
'subsystemCert cert-pki-ca']
|
|
data = {'prefix': 'ca',
|
|
'list': certlist}
|
|
self.__get_keys(ca_host, cacerts_file, cacerts_pwd, data)
|
|
|
|
def get_kra_keys(self, ca_host, cacerts_file, cacerts_pwd):
|
|
certlist = ['auditSigningCert cert-pki-kra',
|
|
'storageCert cert-pki-kra',
|
|
'subsystemCert cert-pki-ca',
|
|
'transportCert cert-pki-kra']
|
|
data = {'prefix': 'ca',
|
|
'list': certlist}
|
|
self.__get_keys(ca_host, cacerts_file, cacerts_pwd, data)
|
|
|
|
def __start(self):
|
|
super(CustodiaInstance, self).__start()
|
|
|
|
def __enable(self):
|
|
super(CustodiaInstance, self).__enable()
|