Coverage for ipalib/plugins/trust : 36%
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# Authors: # Alexander Bokovoy <abokovoy@redhat.com> # Martin Kosek <mkosek@redhat.com> # # Copyright (C) 2011 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/>.
except Exception, e: _murmur_installed = False
except ImportError: _bindings_installed = False
Cross-realm trusts
Manage trust relationship between IPA and Active Directory domains.
In order to allow users from a remote domain to access resources in IPA domain, trust relationship needs to be established. Currently IPA supports only trusts between IPA and Active Directory domains under control of Windows Server 2008 or later, with functional level 2008 or later.
Please note that DNS on both IPA and Active Directory domain sides should be configured properly to discover each other. Trust relationship relies on ability to discover special resources in the other domain via DNS records.
Examples:
1. Establish cross-realm trust with Active Directory using AD administrator credentials:
ipa trust-add --type=ad <ad.domain> --admin <AD domain administrator> --password
2. List all existing trust relationships:
ipa trust-find
3. Show details of the specific trust relationship:
ipa trust-show <ad.domain>
4. Delete existing trust relationship:
ipa trust-del <ad.domain>
Once trust relationship is established, remote users will need to be mapped to local POSIX groups in order to actually use IPA resources. The mapping should be done via use of external membership of non-POSIX group and then this group should be included into one of local POSIX groups.
Example:
1. Create group for the trusted domain admins' mapping and their local POSIX group:
ipa group-add --desc='<ad.domain> admins external map' ad_admins_external --external ipa group-add --desc='<ad.domain> admins' ad_admins
2. Add security identifier of Domain Admins of the <ad.domain> to the ad_admins_external group:
ipa group-add-member ad_admins_external --external 'AD\\Domain Admins'
3. Allow members of ad_admins_external group to be associated with ad_admins POSIX group:
ipa group-add-member ad_admins --groups ad_admins_external
4. List members of external members of ad_admins_external group to see their SIDs:
ipa group-show ad_admins_external
GLOBAL TRUST CONFIGURATION
When IPA AD trust subpackage is installed and ipa-adtrust-install is run, a local domain configuration (SID, GUID, NetBIOS name) is generated. These identifiers are then used when communicating with a trusted domain of the particular type.
1. Show global trust configuration for Active Directory type of trusts:
ipa trustconfig-show --type ad
2. Modify global configuration for all trusts of Active Directory type and set a different fallback primary group (fallback primary group GID is used as a primary user GID if user authenticating to IPA domain does not have any other primary GID already set):
ipa trustconfig-mod --type ad --fallback-primary-group "alternative AD group"
3. Change primary fallback group back to default hidden group (any group with posixGroup object class is allowed):
ipa trustconfig-mod --type ad --fallback-primary-group "Default SMB Group" """)
Str('trustdirection', label=_('Trust direction')), Str('trusttype', label=_('Trust type')), Str('truststatus', label=_('Trust status')), )
2 : _('Active Directory domain'), 3 : _('RFC4120-compliant Kerberos realm')} 2 : _('Trusted forest'), 3 : _('Two-way trust')} False : _('Waiting for confirmation by remote side')}
cli_name='type', label=_('Trust type (ad for Active Directory, default)'), values=(u'ad',), default=u'ad', autofill=True, )
""" Returns a string representing a type of the trust. The original field is an enum: LSA_TRUST_TYPE_DOWNLEVEL = 0x00000001, LSA_TRUST_TYPE_UPLEVEL = 0x00000002, LSA_TRUST_TYPE_MIT = 0x00000003 """ string = _trust_type_dict.get(int(level), _trust_type_dict_unknown) return unicode(string)
""" Returns a string representing a direction of the trust. The original field is a bitmask taking two bits in use LSA_TRUST_DIRECTION_INBOUND = 0x00000001, LSA_TRUST_DIRECTION_OUTBOUND = 0x00000002 """ string = _trust_direction_dict.get(int(level), _trust_type_dict_unknown) return unicode(string)
string = _trust_status_dict.get(level, _trust_type_dict_unknown) return unicode(string)
""" Trust object. """ 'ipanttrusttype', 'ipanttrustattributes', 'ipanttrustdirection', 'ipanttrustpartner', 'ipantauthtrustoutgoing', 'ipanttrustauthincoming', 'ipanttrustforesttrustinfo', 'ipanttrustposixoffset', 'ipantsupportedencryptiontypes' ] 'ipanttrusteddomainsid', 'ipanttrusttype' ]
Str('cn', cli_name='realm', label=_('Realm name'), primary_key=True, ), Str('ipantflatname', cli_name='flat_name', label=_('Domain NetBIOS name'), flags=['no_create', 'no_update']), Str('ipanttrusteddomainsid', cli_name='sid', label=_('Domain Security Identifier'), flags=['no_create', 'no_update']), Str('ipantsidblacklistincoming*', csv=True, cli_name='sid_blacklist_incoming', label=_('SID blacklist incoming'), flags=['no_create']), Str('ipantsidblacklistoutgoing*', csv=True, cli_name='sid_blacklist_outgoing', label=_('SID blacklist outgoing'), flags=['no_create']), )
if not _bindings_installed: # SID validator is not available, return # Even if invalid SID gets in the trust entry, it won't crash # the validation process as it is translated to SID S-0-0 return for attr in ('ipantsidblacklistincoming', 'ipantsidblacklistoutgoing'): values = entry_attrs.get(attr) if not values: continue for value in values: if not ipaserver.dcerpc.is_sid_valid(value): raise errors.ValidationError(name=attr, error=_("invalid SID: %(value)s") % dict(value=value))
assert isinstance(dn, DN) if trust_type in trust.trust_types: container_dn = DN(('cn', trust_type), env.container_trusts, env.basedn) return DN(dn[0], container_dn) return dn
Add new trust to use.
This command establishes trust relationship to another domain which becomes 'trusted'. As result, users of the trusted domain may access resources of this domain.
Only trusts to Active Directory domains are supported right now.
The command can be safely run multiple times against the same domain, this will cause change to trust relationship credentials on both sides. ''')
_trust_type_option, Str('realm_admin?', cli_name='admin', label=_("Active Directory domain administrator"), ), Password('realm_passwd?', cli_name='password', label=_("Active directory domain administrator's password"), confirm=False, ), Str('realm_server?', cli_name='server', label=_('Domain controller for the Active Directory domain (optional)'), ), Password('trust_secret?', cli_name='trust_secret', label=_('Shared secret for the trust'), confirm=False, ), Int('base_id?', cli_name='base_id', label=_('First Posix ID of the range reserved for the trusted domain'), ), Int('range_size?', cli_name='range_size', label=_('Size of the ID range reserved for the trusted domain'), default=200000, autofill=True ), )
if not _murmur_installed and 'base_id' not in options: raise errors.ValidationError(name=_('missing base_id'), error=_('pysss_murmur is not available on the server ' \ 'and no base-id is given.'))
if 'trust_type' in options: if options['trust_type'] == u'ad': result = self.execute_ad(*keys, **options) else: raise errors.ValidationError(name=_('trust type'), error=_('only "ad" is supported')) else: raise errors.RequirementError(name=_('trust type'))
self.add_range(*keys, **options)
trust_filter = "cn=%s" % result['value'] ldap = self.obj.backend (trusts, truncated) = ldap.find_entries( base_dn = DN(api.env.container_trusts, api.env.basedn), filter = trust_filter)
result['result'] = entry_to_dict(trusts[0][1], **options) result['result']['trusttype'] = [trust_type_string(result['result']['ipanttrusttype'][0])] result['result']['trustdirection'] = [trust_direction_string(result['result']['ipanttrustdirection'][0])] result['result']['truststatus'] = [trust_status_string(result['verified'])] del result['verified']
return result
new_obj = api.Command['trust_show'](keys[-1]) dom_sid = new_obj['result']['ipanttrusteddomainsid'][0];
range_name = keys[-1].upper()+'_id_range'
try: old_range = api.Command['idrange_show'](range_name) except errors.NotFound, e: old_range = None
if old_range: old_dom_sid = old_range['result']['ipanttrusteddomainsid'][0];
if old_dom_sid == dom_sid: return
raise errors.ValidationError(name=_('range exists'), error=_('ID range with the same name but different ' \ 'domain SID already exists. The ID range for ' \ 'the new trusted domain must be created manually.'))
if 'base_id' in options: base_id = options['base_id'] else: base_id = 200000 + (pysss_murmur.murmurhash3(dom_sid, len(dom_sid), 0xdeadbeef) % 10000) * 200000
# Add new ID range api.Command['idrange_add'](range_name, ipabaseid=base_id, ipaidrangesize=options['range_size'], ipabaserid=0, ipanttrusteddomainsid=dom_sid)
# Join domain using full credentials and with random trustdom # secret (will be generated by the join method) trustinstance = None if not _bindings_installed: raise errors.NotFound(name=_('AD Trust setup'), reason=_('''Cannot perform join operation without Samba 4 support installed. Make sure you have installed server-trust-ad sub-package of IPA'''))
if 'realm_server' not in options: realm_server = None else: realm_server = options['realm_server']
trustinstance = ipaserver.dcerpc.TrustDomainJoins(self.api) if not trustinstance.configured: raise errors.NotFound(name=_('AD Trust setup'), reason=_('''Cannot perform join operation without own domain configured. Make sure you have run ipa-adtrust-install on the IPA server first'''))
try: existing_trust = api.Command['trust_show'](keys[-1]) summary = _('Re-established trust to domain "%(value)s"') except errors.NotFound: summary = self.msg_summary # 1. Full access to the remote domain. Use admin credentials and # generate random trustdom password to do work on both sides if 'realm_admin' in options: realm_admin = options['realm_admin'] names = realm_admin.split('@') if len(names) > 1: # realm admin name is in UPN format, user@realm, check that # realm is the same as the one that we are attempting to trust if keys[-1].lower() != names[-1].lower(): raise errors.ValidationError(name=_('AD Trust setup'), error=_('Trusted domain and administrator account use different realms')) realm_admin = names[0]
if 'realm_passwd' not in options: raise errors.ValidationError(name=_('AD Trust setup'), error=_('Realm administrator password should be specified')) realm_passwd = options['realm_passwd']
try: result = trustinstance.join_ad_full_credentials(keys[-1], realm_server, realm_admin, realm_passwd) except errors.NotFound, e: error_message=_("Unable to resolve domain controller for '%s' domain. ") % (keys[-1]) instructions=[] if dns_container_exists(self.obj.backend): try: dns_zone = api.Command.dnszone_show(keys[-1])['result'] if ('idnsforwardpolicy' in dns_zone) and dns_zone['idnsforwardpolicy'][0] == u'only': instructions.append(_("Forward policy is defined for it in IPA DNS, " "perhaps forwarder points to incorrect host?")) except (errors.NotFound, KeyError) as e: instructions.append(_("IPA manages DNS, please verify " "your DNS configuration and " "make sure that service records " "of the '%(domain)s' domain can " "be resolved. Examples how to " "configure DNS with CLI commands " "or the Web UI can be found in " "the documentation. " ) % dict(domain=keys[-1])) else: instructions.append(_("Since IPA does not manage DNS records, ensure DNS " "is configured to resolve '%(domain)s' domain from " "IPA hosts and back.") % dict(domain=keys[-1])) raise errors.NotFound(reason=error_message, instructions=instructions)
if result is None: raise errors.ValidationError(name=_('AD Trust setup'), error=_('Unable to verify write permissions to the AD'))
ret = dict(value=trustinstance.remote_domain.info['dns_domain'], verified=result['verified']) ret['summary'] = summary % ret return ret
# 2. We don't have access to the remote domain and trustdom password # is provided. Do the work on our side and inform what to do on remote # side. if 'trust_secret' in options: result = trustinstance.join_ad_ipa_half(keys[-1], realm_server, options['trust_secret']) ret = dict(value=trustinstance.remote_domain.info['dns_domain'], verified=result['verified']) ret['summary'] = summary % ret return ret raise errors.ValidationError(name=_('AD Trust setup'), error=_('Not enough arguments specified to perform trust setup'))
assert isinstance(dn, DN) try: result = self.api.Command.trust_show(keys[-1]) except errors.NotFound, e: self.obj.handle_not_found(*keys) return result['result']['dn']
Modify a trust (for future use).
Currently only the default option to modify the LDAP attributes is available. More specific options will be added in coming releases. """)
'(change will be effective in 60 seconds)')
assert isinstance(dn, DN) result = None try: result = self.api.Command.trust_show(keys[-1]) except errors.NotFound, e: self.obj.handle_not_found(*keys)
self.obj.validate_sid_blacklists(entry_attrs)
# TODO: we found the trust object, now modify it return result['result']['dn']
'%(count)d trust matched', '%(count)d trusts matched', 0 )
# Since all trusts types are stored within separate containers under 'cn=trusts', # search needs to be done on a sub-tree scope
return truncated
(dn, attrs) = entry attrs['trusttype'] = trust_type_string(attrs['ipanttrusttype'][0])
error = None result = None for trust_type in trust.trust_types: options['trust_show_type'] = trust_type try: result = super(trust_show, self).execute(*keys, **options) except errors.NotFound, e: result = None error = e if result: result['result']['trusttype'] = [trust_type_string(result['result']['ipanttrusttype'][0])] result['result']['trustdirection'] = [trust_direction_string(result['result']['ipanttrustdirection'][0])] break if error or not result: self.obj.handle_not_found(*keys)
return result
assert isinstance(dn, DN) if 'trust_show_type' in options: return make_trust_dn(self.env, options['trust_show_type'], dn) return dn
u'ad': DN(('cn', api.env.domain), api.env.container_cifsdomains, api.env.basedn), }
""" Trusts global configuration object """ 'cn', 'ipantsecurityidentifier', 'ipantflatname', 'ipantdomainguid', 'ipantfallbackprimarygroup', ]
Str('cn', label=_('Domain'), flags=['no_update'], ), Str('ipantsecurityidentifier', label=_('Security Identifier'), flags=['no_update'], ), Str('ipantflatname', label=_('NetBIOS name'), flags=['no_update'], ), Str('ipantdomainguid', label=_('Domain GUID'), flags=['no_update'], ), Str('ipantfallbackprimarygroup', cli_name='fallback_primary_group', label=_('Fallback primary group'), ), )
raise errors.RequirementError(name='trust_type') except KeyError: raise errors.ValidationError(name='trust_type', error=_("unsupported trust type"))
""" Checks that group with given name/DN exists and updates the entry_attrs """ if 'ipantfallbackprimarygroup' not in entry_attrs: return
group = entry_attrs['ipantfallbackprimarygroup'] if isinstance(group, (list, tuple)): group = group[0]
if group is None: return
try: dn = DN(group) # group is in a form of a DN try: self.backend.get_entry(dn) except errors.NotFound: self.api.Object['group'].handle_not_found(group) # DN is valid, we can just return return except ValueError: # The search is performed for groups with "posixgroup" objectclass # and not "ipausergroup" so that it can also match groups like # "Default SMB Group" which does not have this objectclass. try: (dn, group_entry) = self.backend.find_entry_by_attr( self.api.Object['group'].primary_key.name, group, ['posixgroup'], [''], DN(api.env.container_group, api.env.basedn)) except errors.NotFound: self.api.Object['group'].handle_not_found(group) else: entry_attrs['ipantfallbackprimarygroup'] = [dn]
""" Convert an group dn into a name. As we use CN as user RDN, its value can be extracted from the DN without further LDAP queries. """ if options.get('raw', False): return
try: groupdn = entry_attrs['ipantfallbackprimarygroup'][0] except (IndexError, KeyError): groupdn = None
if groupdn is None: return assert isinstance(groupdn, DN)
entry_attrs['ipantfallbackprimarygroup'] = [groupdn[0][0].value]
self.obj._normalize_groupdn(entry_attrs) return dn
result = super(trustconfig_mod, self).execute(*keys, **options) result['value'] = options['trust_type'] return result
self.obj._convert_groupdn(entry_attrs, options) return dn
result['value'] = options['trust_type'] return result
self.obj._convert_groupdn(entry_attrs, options) return dn
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