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beaa0562dc
Dogtag has implemented a new random serial number scheme they are calling RSNv3. https://github.com/dogtagpki/pki/wiki/Random-Certificate-Serial-Numbers-v3 Given the known issues reported this will be supported in IPA for new installations only. There is no mixing of random servers and non-random servers allowed. Instructions for installing a CA: https://github.com/dogtagpki/pki/blob/master/docs/installation/ca/Installing-CA-with-Random-Serial-Numbers-v3.adoc Instructions for installing a KRA: https://github.com/dogtagpki/pki/blob/master/docs/installation/kra/Installig-KRA-with-Random-Serial-Numbers-v3.adoc The version of random serial numbers is stored within the CA entry of the server. It is stored as a version to allow for future upgrades. If a CA has RSN enabled then any KRA installed will also have it enabled for its identifiers. A new attribute, ipaCaRandomSerialNumberVersion, is added to the IPA CA entry to track the version number in case PKI has future major revisions. This can also be used to determine if RSN is enabled or not. Fixes: https://pagure.io/freeipa/issue/2016 Signed-off-by: Rob Crittenden <rcritten@redhat.com> Reviewed-By: Florence Blanc-Renaud <flo@redhat.com> Reviewed-By: Francisco Trivino <ftrivino@redhat.com> Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
625 lines
22 KiB
Python
625 lines
22 KiB
Python
#
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# Copyright (C) 2015 FreeIPA Contributors see COPYING for license
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#
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"""
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CA installer module
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"""
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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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import os.path
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import pki.util
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import six
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from ipalib.constants import IPA_CA_CN
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from ipalib.install import certstore
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from ipalib.install.service import enroll_only, master_install_only, replica_install_only
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from ipaserver.install import sysupgrade
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from ipapython.install import typing
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from ipapython.install.core import group, knob, extend_knob
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from ipaserver.install import cainstance, bindinstance, dsinstance
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from ipapython import ipautil, certdb
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from ipapython import ipaldap
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from ipapython.admintool import ScriptError
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from ipaplatform import services
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from ipaplatform.paths import paths
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from ipaserver.install import installutils, certs
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from ipaserver.install.replication import replica_conn_check
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from ipalib import api, errors, x509
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from ipapython.dn import DN
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from . import conncheck, dogtag, cainstance
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if six.PY3:
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unicode = str
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VALID_SUBJECT_BASE_ATTRS = {
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'st', 'o', 'ou', 'dnqualifier', 'c', 'serialnumber', 'l', 'title', 'sn',
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'givenname', 'initials', 'generationqualifier', 'dc', 'mail', 'uid',
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'postaladdress', 'postalcode', 'postofficebox', 'houseidentifier', 'e',
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'street', 'pseudonym', 'incorporationlocality', 'incorporationstate',
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'incorporationcountry', 'businesscategory',
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}
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VALID_SUBJECT_ATTRS = {'cn'} | VALID_SUBJECT_BASE_ATTRS
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logger = logging.getLogger(__name__)
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external_cert_file = None
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external_ca_file = None
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def subject_validator(valid_attrs, value):
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if not isinstance(value, unicode):
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v = unicode(value, 'utf-8')
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else:
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v = value
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if any(ord(c) < 0x20 for c in v):
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raise ValueError("must not contain control characters")
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if '&' in v:
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raise ValueError("must not contain an ampersand (\"&\")")
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try:
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dn = DN(v)
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for rdn in dn:
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if rdn.attr.lower() not in valid_attrs:
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raise ValueError("invalid attribute: \"%s\"" % rdn.attr)
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except ValueError as e:
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raise ValueError("invalid DN: %s" % e)
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def random_serial_numbers_version(enabled):
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"""Return True if PKI supports RSNv3
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The caller is responsible for raising the exception.
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"""
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if not enabled:
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return None, None
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pki_version = pki.util.Version(pki.specification_version())
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return pki_version >= pki.util.Version("11.2.0"), pki_version
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def random_serial_numbers_validator(enabled):
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val, pki_version = random_serial_numbers_version(enabled)
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if val is False:
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raise ValueError(
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"Random Serial Numbers are not supported in PKI version %s"
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% pki_version
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)
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def lookup_ca_subject(api, subject_base):
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dn = DN(('cn', IPA_CA_CN), api.env.container_ca, api.env.basedn)
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try:
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# we do not use api.Command.ca_show because it attempts to
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# talk to the CA (to read certificate / chain), but the RA
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# backend may be unavailable (ipa-replica-install) or unusable
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# due to RA Agent cert not yet created (ipa-ca-install).
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ca_subject = api.Backend.ldap2.get_entry(dn)['ipacasubjectdn'][0]
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except errors.NotFound:
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# if the entry doesn't exist, we are dealing with a pre-v4.4
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# installation, where the default CA subject was always based
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# on the subject_base.
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#
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# installutils.default_ca_subject_dn is NOT used here in
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# case the default changes in the future.
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ca_subject = DN(('CN', 'Certificate Authority'), subject_base)
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return str(ca_subject)
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def lookup_random_serial_number_version(api):
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"""
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Retrieve the random serial number version number from the
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remote server.
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If the value is > 0 then RSN was enabled. Return the raw
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value for future-proofing in case version-specific decisions
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need to be made.
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Returns 0 if RSN is not enabled or otherwise not available.
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"""
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dn = DN(('cn', IPA_CA_CN), api.env.container_ca, api.env.basedn)
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version = 0
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try:
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# we do not use api.Command.ca_show because it attempts to
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# talk to the CA (to read certificate / chain), but the RA
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# backend may be unavailable (ipa-replica-install) or unusable
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# due to RA Agent cert not yet created (ipa-ca-install).
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entry = api.Backend.ldap2.get_entry(dn)
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# If the attribute doesn't exist then the remote didn't
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# enable RSN.
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if 'ipacarandomserialnumberversion' in entry:
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version = int(entry['ipacarandomserialnumberversion'][0])
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except (errors.NotFound, KeyError):
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# if the entry doesn't exist then the remote doesn't support
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# RSN so there is nothing to do.
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pass
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return version
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def set_subject_base_in_config(subject_base):
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entry_attrs = api.Backend.ldap2.get_ipa_config()
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entry_attrs['ipacertificatesubjectbase'] = [str(subject_base)]
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try:
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api.Backend.ldap2.update_entry(entry_attrs)
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except errors.EmptyModlist:
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pass
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def print_ca_configuration(options):
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"""Print info about how the CA will be configured.
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Does not print trailing empty line.
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"""
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print("The CA will be configured with:")
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print("Subject DN: {}".format(options.ca_subject))
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print("Subject base: {}".format(options.subject_base))
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if options.external_ca:
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chaining = "externally signed (two-step installation)"
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elif options.external_cert_files:
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chaining = "externally signed"
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else:
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chaining = "self-signed"
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print("Chaining: {}".format(chaining))
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def uninstall_check(options):
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"""Check if the host is CRL generation master"""
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# Skip the checks if the host is not a CA instance
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ca = cainstance.CAInstance(api.env.realm)
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if not (api.Command.ca_is_enabled()['result'] and
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cainstance.is_ca_installed_locally()):
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return
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# skip the checks if the host is the last master
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ipa_config = api.Command.config_show()['result']
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ipa_masters = ipa_config.get('ipa_master_server', [])
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if len(ipa_masters) <= 1:
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return
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try:
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crlgen_enabled = ca.is_crlgen_enabled()
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except cainstance.InconsistentCRLGenConfigException:
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# If config is inconsistent, let's be safe and act as if
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# crl gen was enabled
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crlgen_enabled = True
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if crlgen_enabled:
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print("Deleting this server will leave your installation "
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"without a CRL generation master.")
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if (options.unattended and not options.ignore_last_of_role) or \
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not (options.unattended or ipautil.user_input(
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"Are you sure you want to continue with the uninstall "
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"procedure?", False)):
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raise ScriptError("Aborting uninstall operation.")
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def install_check(standalone, replica_config, options):
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global external_cert_file
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global external_ca_file
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realm_name = options.realm_name
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host_name = options.host_name
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if replica_config is None:
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options._subject_base = options.subject_base
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options._ca_subject = options.ca_subject
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options._random_serial_numbers = options.random_serial_numbers
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else:
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# during replica install, this gets invoked before local DS is
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# available, so use the remote api.
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_api = api if standalone else options._remote_api
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# for replica-install the knobs cannot be written, hence leading '_'
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options._subject_base = str(replica_config.subject_base)
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options._ca_subject = lookup_ca_subject(_api, options._subject_base)
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options._random_serial_numbers = (
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lookup_random_serial_number_version(_api) > 0
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)
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if options._random_serial_numbers and replica_config.setup_ca:
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try:
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random_serial_numbers_validator(
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options._random_serial_numbers
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)
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except ValueError as e:
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raise ScriptError(str(e))
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if replica_config is not None and not replica_config.setup_ca:
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return
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if replica_config is not None:
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if standalone and api.env.ra_plugin == 'selfsign':
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raise ScriptError('A selfsign CA can not be added')
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if standalone and not options.skip_conncheck:
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principal = options.principal
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replica_conn_check(
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replica_config.ca_host_name, host_name, realm_name, True,
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replica_config.ca_ds_port, options.admin_password,
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principal=principal, ca_cert_file=options.ca_cert_file)
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if options.skip_schema_check:
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logger.info("Skipping CA DS schema check")
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return
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if standalone:
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if api.Command.ca_is_enabled()['result']:
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raise ScriptError(
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"One or more CA masters are already present in IPA realm "
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"'%s'.\nIf you wish to replicate CA to this host, please "
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"re-run 'ipa-ca-install'\nwith a replica file generated on "
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"an existing CA master as argument." % realm_name
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)
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if options.external_cert_files:
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if not cainstance.is_step_one_done():
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# This can happen if someone passes external_ca_file without
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# already having done the first stage of the CA install.
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raise ScriptError(
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"CA is not installed yet. To install with an external CA "
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"is a two-stage process.\nFirst run the installer with "
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"--external-ca.")
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external_cert_file, external_ca_file = installutils.load_external_cert(
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options.external_cert_files, options._ca_subject)
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elif options.external_ca:
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if cainstance.is_step_one_done():
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raise ScriptError(
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"CA is already installed.\nRun the installer with "
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"--external-cert-file.")
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if os.path.isfile(paths.ROOT_IPA_CSR):
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raise ScriptError(
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"CA CSR file %s already exists.\nIn order to continue "
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"remove the file and run the installer again." %
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paths.ROOT_IPA_CSR)
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if not options.external_ca_type:
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options.external_ca_type = x509.ExternalCAType.GENERIC.value
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if options.external_ca_profile is not None:
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# check that profile is valid for the external ca type
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if options.external_ca_type \
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not in options.external_ca_profile.valid_for:
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raise ScriptError(
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"External CA profile specification '{}' "
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"cannot be used with external CA type '{}'."
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.format(
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options.external_ca_profile.unparsed_input,
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options.external_ca_type)
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)
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if not options.external_cert_files:
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if not cainstance.check_ports():
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print(
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"IPA requires ports 8080 and 8443 for PKI, but one or more "
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"are currently in use."
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)
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raise ScriptError("Aborting installation")
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if standalone:
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dirname = dsinstance.config_dirname(
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ipaldap.realm_to_serverid(realm_name))
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cadb = certs.CertDB(realm_name, nssdir=paths.PKI_TOMCAT_ALIAS_DIR,
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subject_base=options._subject_base)
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dsdb = certs.CertDB(
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realm_name, nssdir=dirname, subject_base=options._subject_base)
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# Check that we can add our CA cert to DS and PKI NSS databases
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for db in (cadb, dsdb):
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if not db.exists():
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continue
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for nickname, _trust_flags in db.list_certs():
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if nickname == certdb.get_ca_nickname(realm_name):
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raise ScriptError(
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"Certificate with nickname %s is present in %s, "
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"cannot continue." % (nickname, db.secdir))
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cert = db.get_cert_from_db(nickname)
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if not cert:
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continue
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subject = DN(cert.subject)
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if subject == DN(options._ca_subject):
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raise ScriptError(
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"Certificate with subject %s is present in %s, "
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"cannot continue." % (subject, db.secdir))
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def install(standalone, replica_config, options, custodia):
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install_step_0(standalone, replica_config, options, custodia=custodia)
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install_step_1(standalone, replica_config, options, custodia=custodia)
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def install_step_0(standalone, replica_config, options, custodia):
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realm_name = options.realm_name
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dm_password = options.dm_password
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host_name = options.host_name
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ca_subject = options._ca_subject
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subject_base = options._subject_base
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external_ca_profile = None
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if replica_config is None:
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ca_signing_algorithm = options.ca_signing_algorithm
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if options.external_ca:
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ca_type = options.external_ca_type
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external_ca_profile = options.external_ca_profile
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csr_file = paths.ROOT_IPA_CSR
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else:
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ca_type = None
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csr_file = None
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if options.external_cert_files:
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cert_file = external_cert_file.name
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cert_chain_file = external_ca_file.name
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else:
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cert_file = None
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cert_chain_file = None
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pkcs12_info = None
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master_host = None
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master_replication_port = None
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ra_p12 = None
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ra_only = False
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promote = False
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else:
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cafile = os.path.join(replica_config.dir, 'cacert.p12')
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custodia.get_ca_keys(
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cafile,
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replica_config.dirman_password)
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ca_signing_algorithm = None
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ca_type = None
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csr_file = None
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cert_file = None
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cert_chain_file = None
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pkcs12_info = (cafile,)
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master_host = replica_config.ca_host_name
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master_replication_port = replica_config.ca_ds_port
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ra_p12 = os.path.join(replica_config.dir, 'ra.p12')
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ra_only = not replica_config.setup_ca
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promote = True
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# if upgrading from CA-less to CA-ful, need to rewrite
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# certmap.conf and subject_base configuration
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#
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set_subject_base_in_config(subject_base)
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sysupgrade.set_upgrade_state(
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'certmap.conf', 'subject_base', str(subject_base))
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dsinstance.write_certmap_conf(realm_name, ca_subject)
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# use secure ldaps when installing a replica or upgrading to CA-ful
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# In both cases, 389-DS is already configured to have a trusted cert.
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use_ldaps = standalone or replica_config is not None
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ca = cainstance.CAInstance(
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realm=realm_name, host_name=host_name, custodia=custodia
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)
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ca.configure_instance(
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host_name, dm_password, dm_password,
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subject_base=subject_base,
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ca_subject=ca_subject,
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ca_signing_algorithm=ca_signing_algorithm,
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ca_type=ca_type,
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external_ca_profile=external_ca_profile,
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csr_file=csr_file,
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cert_file=cert_file,
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cert_chain_file=cert_chain_file,
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pkcs12_info=pkcs12_info,
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master_host=master_host,
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master_replication_port=master_replication_port,
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ra_p12=ra_p12,
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ra_only=ra_only,
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promote=promote,
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use_ldaps=use_ldaps,
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pki_config_override=options.pki_config_override,
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random_serial_numbers=options._random_serial_numbers,
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)
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def install_step_1(standalone, replica_config, options, custodia):
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if replica_config is not None and not replica_config.setup_ca:
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return
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realm_name = options.realm_name
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host_name = options.host_name
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subject_base = options._subject_base
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basedn = ipautil.realm_to_suffix(realm_name)
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ca = cainstance.CAInstance(
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realm=realm_name, host_name=host_name, custodia=custodia
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)
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ca.stop('pki-tomcat')
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# This is done within stopped_service context, which restarts CA
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ca.enable_client_auth_to_db()
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# Lightweight CA key retrieval is configured in step 1 instead
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# of CAInstance.configure_instance (which is invoked from step
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# 0) because kadmin_addprinc fails until krb5.conf is installed
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# by krb.create_instance.
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#
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ca.setup_lightweight_ca_key_retrieval()
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serverid = ipaldap.realm_to_serverid(realm_name)
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if standalone and replica_config is None:
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dirname = dsinstance.config_dirname(serverid)
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# Store the new IPA CA cert chain in DS NSS database and LDAP
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cadb = certs.CertDB(
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realm_name, nssdir=paths.PKI_TOMCAT_ALIAS_DIR,
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subject_base=subject_base)
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dsdb = certs.CertDB(
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realm_name, nssdir=dirname, subject_base=subject_base)
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cacert = cadb.get_cert_from_db('caSigningCert cert-pki-ca')
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nickname = certdb.get_ca_nickname(realm_name)
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trust_flags = certdb.IPA_CA_TRUST_FLAGS
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dsdb.add_cert(cacert, nickname, trust_flags)
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certstore.put_ca_cert_nss(api.Backend.ldap2, api.env.basedn,
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cacert, nickname, trust_flags,
|
|
config_ipa=True, config_compat=True)
|
|
|
|
# Store DS CA cert in Dogtag NSS database
|
|
trust_flags = dict(reversed(dsdb.list_certs()))
|
|
server_certs = dsdb.find_server_certs()
|
|
trust_chain = dsdb.find_root_cert(server_certs[0][0])[:-1]
|
|
nickname = trust_chain[-1]
|
|
cert = dsdb.get_cert_from_db(nickname)
|
|
cadb.add_cert(cert, nickname, trust_flags[nickname])
|
|
|
|
installutils.restart_dirsrv()
|
|
|
|
ca.start('pki-tomcat')
|
|
|
|
if standalone or replica_config is not None:
|
|
# We need to restart apache as we drop a new config file in there
|
|
services.knownservices.httpd.restart(capture_output=True)
|
|
|
|
if standalone:
|
|
# Install CA DNS records
|
|
if bindinstance.dns_container_exists(basedn):
|
|
bind = bindinstance.BindInstance()
|
|
bind.update_system_records()
|
|
|
|
|
|
def uninstall():
|
|
ca_instance = cainstance.CAInstance(api.env.realm)
|
|
ca_instance.stop_tracking_certificates()
|
|
ipautil.remove_file(paths.RA_AGENT_PEM)
|
|
ipautil.remove_file(paths.RA_AGENT_KEY)
|
|
if ca_instance.is_configured():
|
|
ca_instance.uninstall()
|
|
|
|
|
|
class CASigningAlgorithm(enum.Enum):
|
|
SHA1_WITH_RSA = 'SHA1withRSA'
|
|
SHA_256_WITH_RSA = 'SHA256withRSA'
|
|
SHA_384_WITH_RSA = 'SHA384withRSA'
|
|
SHA_512_WITH_RSA = 'SHA512withRSA'
|
|
|
|
|
|
@group
|
|
class CAInstallInterface(dogtag.DogtagInstallInterface,
|
|
conncheck.ConnCheckInterface):
|
|
"""
|
|
Interface of the CA installer
|
|
|
|
Knobs defined here will be available in:
|
|
* ipa-server-install
|
|
* ipa-replica-prepare
|
|
* ipa-replica-install
|
|
* ipa-ca-install
|
|
"""
|
|
description = "Certificate system"
|
|
|
|
principal = conncheck.ConnCheckInterface.principal
|
|
principal = extend_knob(
|
|
principal,
|
|
description="User allowed to manage replicas",
|
|
cli_names=list(principal.cli_names) + ['-P'],
|
|
)
|
|
principal = enroll_only(principal)
|
|
principal = replica_install_only(principal)
|
|
|
|
admin_password = conncheck.ConnCheckInterface.admin_password
|
|
admin_password = extend_knob(
|
|
admin_password,
|
|
description="Admin user Kerberos password used for connection check",
|
|
cli_names=list(admin_password.cli_names) + ['-w'],
|
|
)
|
|
admin_password = enroll_only(admin_password)
|
|
|
|
external_ca = knob(
|
|
None,
|
|
description=("Generate a CSR for the IPA CA certificate to be signed "
|
|
"by an external CA"),
|
|
)
|
|
external_ca = master_install_only(external_ca)
|
|
|
|
external_ca_type = knob(
|
|
x509.ExternalCAType, None, description="Type of the external CA")
|
|
external_ca_type = master_install_only(external_ca_type)
|
|
|
|
external_ca_profile = knob(
|
|
type=x509.ExternalCAProfile,
|
|
default=None,
|
|
description=(
|
|
"Specify the certificate profile/template to use at the "
|
|
"external CA"),
|
|
)
|
|
external_ca_profile = master_install_only(external_ca_profile)
|
|
|
|
external_cert_files = knob(
|
|
typing.List[str], None,
|
|
description=("File containing the IPA CA certificate and the external "
|
|
"CA certificate chain"),
|
|
cli_names='--external-cert-file',
|
|
cli_deprecated_names=['--external_cert_file', '--external_ca_file'],
|
|
cli_metavar='FILE',
|
|
)
|
|
external_cert_files = master_install_only(external_cert_files)
|
|
|
|
@external_cert_files.validator
|
|
def external_cert_files(self, value):
|
|
if any(not os.path.isabs(path) for path in value):
|
|
raise ValueError("must use an absolute path")
|
|
|
|
subject_base = knob(
|
|
str, None,
|
|
description=(
|
|
"The certificate subject base (default O=<realm-name>). "
|
|
"RDNs are in LDAP order (most specific RDN first)."
|
|
),
|
|
cli_deprecated_names=['--subject'],
|
|
)
|
|
subject_base = master_install_only(subject_base)
|
|
|
|
@subject_base.validator
|
|
def subject_base(self, value):
|
|
subject_validator(VALID_SUBJECT_BASE_ATTRS, value)
|
|
|
|
ca_subject = knob(
|
|
str, None,
|
|
description=(
|
|
"The CA certificate subject DN "
|
|
"(default CN=Certificate Authority,O=<realm-name>). "
|
|
"RDNs are in LDAP order (most specific RDN first)."
|
|
),
|
|
)
|
|
ca_subject = master_install_only(ca_subject)
|
|
|
|
@ca_subject.validator
|
|
def ca_subject(self, value):
|
|
subject_validator(VALID_SUBJECT_ATTRS, value)
|
|
|
|
ca_signing_algorithm = knob(
|
|
CASigningAlgorithm, None,
|
|
description="Signing algorithm of the IPA CA certificate",
|
|
)
|
|
ca_signing_algorithm = master_install_only(ca_signing_algorithm)
|
|
|
|
skip_schema_check = knob(
|
|
None,
|
|
description="skip check for updated CA DS schema on the remote master",
|
|
)
|
|
skip_schema_check = enroll_only(skip_schema_check)
|
|
skip_schema_check = replica_install_only(skip_schema_check)
|
|
|
|
random_serial_numbers = knob(
|
|
None,
|
|
description="Enable random serial numbers",
|
|
)
|
|
random_serial_numbers = master_install_only(random_serial_numbers)
|
|
|
|
@random_serial_numbers.validator
|
|
def random_serial_numbers(self, value):
|
|
random_serial_numbers_validator(value)
|