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# Authors: Karl MacMillan <kmacmillan@mentalrootkit.com>
# Jan Cholasta <jcholast@redhat.com>
#
# Copyright (C) 2007-2013 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/>.
#
from __future__ import print_function, absolute_import
import os
import os.path
import tempfile
from ipalib import x509
from ipalib.install import certmonger
from ipaplatform.paths import paths
from ipapython import admintool, dogtag, config
from ipapython.certdb import NSSDatabase, get_ca_nickname
from ipapython.dn import DN
from ipapython import ipaldap
from ipalib import api, errors
from ipaserver.install import certs, dsinstance, installutils, krbinstance
from ipaserver.install import cainstance
class ServerCertInstall(admintool.AdminTool):
command_name = 'ipa-server-certinstall'
usage = "%prog <-d|-w|-k> [options] <file> ..."
description = "Install new SSL server certificates."
@classmethod
def add_options(cls, parser):
super(ServerCertInstall, cls).add_options(parser)
parser.add_option(
"-d", "--dirsrv",
dest="dirsrv", action="store_true", default=False,
help="install certificate for the directory server")
parser.add_option(
"-w", "--http",
dest="http", action="store_true", default=False,
help="install certificate for the http server")
parser.add_option(
"-k", "--kdc",
dest="kdc", action="store_true", default=False,
help="install PKINIT certificate for the KDC")
parser.add_option(
"--pin",
dest="pin", metavar="PIN", sensitive=True,
help="The password of the PKCS#12 file")
parser.add_option(
"--dirsrv_pin", "--http_pin",
dest="pin", sensitive=True,
help=config.SUPPRESS_HELP)
parser.add_option(
"--cert-name",
dest="cert_name", metavar="NAME",
help="Name of the certificate to install")
parser.add_option(
"-p", "--dirman-password",
dest="dirman_password", sensitive=True,
help="Directory Manager password")
def validate_options(self):
super(ServerCertInstall, self).validate_options(needs_root=True)
installutils.check_server_configuration()
if not any((self.options.dirsrv, self.options.http, self.options.kdc)):
self.option_parser.error(
"you must specify dirsrv, http and/or kdc")
if not self.args:
self.option_parser.error("you must provide certificate filename")
def ask_for_options(self):
super(ServerCertInstall, self).ask_for_options()
if not self.options.dirman_password:
self.options.dirman_password = installutils.read_password(
"Directory Manager", confirm=False, validate=False, retry=False)
if self.options.dirman_password is None:
raise admintool.ScriptError(
"Directory Manager password required")
if self.options.pin is None:
self.options.pin = installutils.read_password(
"Enter private key unlock",
confirm=False, validate=False, retry=False)
if self.options.pin is None:
raise admintool.ScriptError(
"Private key unlock password required")
def validate_http_cert(self):
if dogtag.acme_status():
cert, unused, _unused = self.load_pkcs12(
ca_chain_fname=paths.IPA_CA_CRT,
host_name=api.env.host
)
cainstance.check_ipa_ca_san(cert)
def run(self):
api.bootstrap(in_server=True, confdir=paths.ETC_IPA)
api.finalize()
api.Backend.ldap2.connect(bind_pw=self.options.dirman_password)
if self.options.http:
self.validate_http_cert()
if self.options.dirsrv:
self.install_dirsrv_cert()
if self.options.http:
self.replace_http_cert()
if self.options.kdc:
self.replace_kdc_cert()
print(
"Please restart ipa services after installing certificate "
"(ipactl restart)")
api.Backend.ldap2.disconnect()
def install_dirsrv_cert(self):
serverid = ipaldap.realm_to_serverid(api.env.realm)
dirname = dsinstance.config_dirname(serverid)
conn = api.Backend.ldap2
entry = conn.get_entry(DN(('cn', 'RSA'), ('cn', 'encryption'),
('cn', 'config')),
['nssslpersonalityssl'])
old_cert = entry.single_value['nssslpersonalityssl']
server_cert = self.import_cert(dirname, self.options.pin,
old_cert, 'ldap/%s' % api.env.host,
'restart_dirsrv %s' % serverid)
entry['nssslpersonalityssl'] = [server_cert]
try:
conn.update_entry(entry)
except errors.EmptyModlist:
pass
def replace_http_cert(self):
"""
Replace the current HTTP cert-key pair with another one
from a PKCS#12 file
"""
# pass in `host_name` to perform
# `NSSDatabase.verify_server_cert_validity()``
cert, key, ca_cert = self.load_pkcs12(
ca_chain_fname=paths.IPA_CA_CRT,
host_name=api.env.host
)
key_passwd_path = paths.HTTPD_PASSWD_FILE_FMT.format(host=api.env.host)
req_id = self.replace_key_cert_files(
cert, key,
cert_fname=paths.HTTPD_CERT_FILE,
key_fname=paths.HTTPD_KEY_FILE,
ca_cert=ca_cert,
passwd_fname=key_passwd_path,
cmgr_post_command='restart_httpd')
if req_id is not None:
certmonger.add_principal(
req_id, 'HTTP/{host}'.format(host=api.env.host))
certmonger.add_subject(req_id, str(DN(cert.subject)))
def replace_kdc_cert(self):
# pass in `realm` to perform `NSSDatabase.verify_kdc_cert_validity()`
cert, key, ca_cert = self.load_pkcs12(
ca_chain_fname=paths.CA_BUNDLE_PEM, realm_name=api.env.realm)
self.replace_key_cert_files(
cert, key, paths.KDC_CERT, paths.KDC_KEY, ca_cert,
profile="KDCs_PKINIT_Certs"
)
krb = krbinstance.KrbInstance()
krb.init_info(
realm_name=api.env.realm,
host_name=api.env.host,
)
krb.pkinit_enable()
def load_pkcs12(self, ca_chain_fname=paths.IPA_CA_CRT, **kwargs):
# Note that the "installutils.load_pkcs12" is quite a complex function
# which performs some checking based on its kwargs:
# host_name performs NSSDatabase.verify_server_cert_validity()
# realm performs NSSDatabase.verify_kdc_cert_validity()
pkcs12_file, pin, ca_cert = installutils.load_pkcs12(
cert_files=self.args,
key_password=self.options.pin,
key_nickname=self.options.cert_name,
ca_cert_files=[ca_chain_fname],
**kwargs)
# Check that the ca_cert is known and trusted
with tempfile.NamedTemporaryFile() as temp:
certs.install_pem_from_p12(pkcs12_file.name, pin, temp.name)
cert = x509.load_certificate_from_file(temp.name)
with tempfile.NamedTemporaryFile("rb") as temp:
certs.install_key_from_p12(pkcs12_file.name, pin, temp.name)
key = x509.load_pem_private_key(
temp.read(), None, backend=x509.default_backend())
return cert, key, ca_cert
def replace_key_cert_files(
self, cert, key, cert_fname, key_fname, ca_cert, passwd_fname=None,
profile=None, cmgr_post_command=None
):
try:
ca_enabled = api.Command.ca_is_enabled()['result']
if ca_enabled:
certmonger.stop_tracking(certfile=cert_fname)
pkey_passwd = None
if passwd_fname is not None:
with open(passwd_fname, 'rb') as f:
pkey_passwd = f.read()
x509.write_certificate(cert, cert_fname)
x509.write_pem_private_key(key, key_fname, pkey_passwd)
if ca_enabled:
# Start tracking only if the cert was issued by IPA CA
# Retrieve IPA CA
cdb = certs.CertDB(api.env.realm, nssdir=paths.IPA_NSSDB_DIR)
ipa_ca_cert = cdb.get_cert_from_db(
get_ca_nickname(api.env.realm))
# And compare with the CA which signed this certificate
if ca_cert == ipa_ca_cert:
req_id = certmonger.start_tracking(
(cert_fname, key_fname),
pinfile=passwd_fname,
storage='FILE',
post_command=cmgr_post_command
)
return req_id
except RuntimeError as e:
raise admintool.ScriptError(str(e))
return None
def check_chain(self, pkcs12_filename, pkcs12_pin, nssdb):
# create a temp nssdb
with NSSDatabase() as tempnssdb:
tempnssdb.create_db()
# import the PKCS12 file, then delete all CA certificates
# this leaves only the server certs in the temp db
tempnssdb.import_pkcs12(pkcs12_filename, pkcs12_pin)
for nickname, flags in tempnssdb.list_certs():
if not flags.has_key:
while tempnssdb.has_nickname(nickname):
tempnssdb.delete_cert(nickname)
# import all the CA certs from nssdb into the temp db
for nickname, flags in nssdb.list_certs():
if not flags.has_key:
certs = nssdb.get_cert_from_db(nickname, all=True)
for cert in certs:
tempnssdb.add_cert(cert, nickname, flags)
# now get the server certs from tempnssdb and check their validity
try:
for nick, flags in tempnssdb.find_server_certs():
tempnssdb.verify_server_cert_validity(nick, api.env.host)
except ValueError as e:
raise admintool.ScriptError(
"Peer's certificate issuer is not trusted (%s). "
"Please run ipa-cacert-manage install and ipa-certupdate "
"to install the CA certificate." % str(e))
def import_cert(self, dirname, pkcs12_passwd, old_cert, principal, command):
pkcs12_file, pin, ca_cert = installutils.load_pkcs12(
cert_files=self.args,
key_password=pkcs12_passwd,
key_nickname=self.options.cert_name,
ca_cert_files=[paths.IPA_CA_CRT],
host_name=api.env.host)
dirname = os.path.normpath(dirname)
cdb = certs.CertDB(api.env.realm, nssdir=dirname)
# Check that the ca_cert is known and trusted
self.check_chain(pkcs12_file.name, pin, cdb)
try:
ca_enabled = api.Command.ca_is_enabled()['result']
if ca_enabled:
cdb.untrack_server_cert(old_cert)
cdb.delete_cert(old_cert)
prevs = cdb.find_server_certs()
cdb.import_pkcs12(pkcs12_file.name, pin)
news = cdb.find_server_certs()
server_certs = [item for item in news if item not in prevs]
server_cert = server_certs[0][0]
if ca_enabled:
# Start tracking only if the cert was issued by IPA CA
# Retrieve IPA CA
ipa_ca_cert = cdb.get_cert_from_db(
get_ca_nickname(api.env.realm))
# And compare with the CA which signed this certificate
if ca_cert == ipa_ca_cert:
cdb.track_server_cert(server_cert,
principal,
cdb.passwd_fname,
command)
except RuntimeError as e:
raise admintool.ScriptError(str(e))
return server_cert
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