Until incoming trust is validated from AD side, we cannot run any operations
against AD using the trust. Also, Samba currently does not suport verifying
trust against the other party (returns WERR_NOT_SUPPORTED).
This needs to be added to the documentation:
When using 'ipa trust-add ad.domain --trust-secret', one has to manually
validate incoming trust using forest trust properties in AD Domains and
Trusts tool.
Once incoming trust is validated at AD side, use IPA command
'ipa trust-fetch-domains ad.domain' to retrieve topology of the AD forest.
From this point on the trust should be usable.
https://fedorahosted.org/freeipa/ticket/4246
Reviewed-By: Martin Kosek <mkosek@redhat.com>
Trusted domain SID could be obtained through different means. When it is
fetched from the AD DC via LDAP, it needs to be extracted from a default
context and explicitly converted to unicode.
https://fedorahosted.org/freeipa/ticket/4246
Reviewed-By: Martin Kosek <mkosek@redhat.com>
When client principal is the same as supplied client entry, don't fetch it
again.
Note that when client principal is not NULL, client entry might be NULL for
cross-realm case, so we need to make sure to not dereference NULL pointer here.
Also fix reverted condition for case when we didn't find the client principal
in the database, preventing a memory leak.
https://fedorahosted.org/freeipa/ticket/4223
Reviewed-By: Sumit Bose <sbose@redhat.com>
We attempt to delete the trust that might exist already. If there are not enough
privileges to do so, we wouldn't be able to create trust at the next step and it will fail.
However, failure to create trust will be due to the name collision as we already had
the trust with the same name before. Thus, raise access denied exception here
to properly indicate wrong access level instead of returning NT_STATUS_OBJECT_NAME_COLLISION.
https://fedorahosted.org/freeipa/ticket/4202
Reviewed-By: Martin Kosek <mkosek@redhat.com>
forest trust
Even though we are creating idranges for subdomains only in case
there is algorithmic ID mapping in use, we still need to fetch
list of subdomains for all other cases.
https://fedorahosted.org/freeipa/ticket/4205
When admin clears authdata flag for the service principal, KDC will pass
NULL client pointer (service proxy) to the DAL driver.
Make sure we bail out correctly.
Reviewed-By: Tomáš Babej <tbabej@redhat.com>
Reviewed-By: Simo Sorce <ssorce@redhat.com>
Show status of each enumerated domain
trustdomain-find shows list of domains associated with the trust.
Each domain except the trust forest root can be enabled or disabled
with the help of trustdomain-enable and trustdomain-disable commands.
https://fedorahosted.org/freeipa/ticket/4096
Latest support for subdomains introduced regression that masked
difference between newly added trust and re-added one.
Additionally, in case no new subdomains were found, the code was
returning None instead of an empty list which later could confuse
trustdomain-find command.
https://fedorahosted.org/freeipa/ticket/4067
When AD administrator credentials passed, they stored in realm_passwd,
not realm_password in the options.
When passing credentials to ipaserver.dcerpc.fetch_domains(), make sure
to normalize them.
Additionally, force Samba auth module to use NTLMSSP in case we have
credentials because at the point when trust is established, KDC is not
yet ready to issue tickets to a service in the other realm due to
MS-PAC information caching effects. The logic is a bit fuzzy because
credentials code makes decisions on what to use based on the smb.conf
parameters and Python bindings to set parameters to smb.conf make it so
that auth module believes these parameters were overidden by the user
through the command line and ignore some of options. We have to do calls
in the right order to force NTLMSSP use instead of Kerberos.
Fixes https://fedorahosted.org/freeipa/ticket/4046
When we get NT_STATUS_INVALID_PARAMETER in response to establish
DCE RPC pipe with Kerberos, the most likely reason is clock skew.
Suggest that it is so in the error message.
https://fedorahosted.org/freeipa/ticket/4024
When MS-PAC information is re-initialized, record also parent-child
relationship between trust root level domain and its subdomains.
Use parent incoming SID black list to check if child domain is not
allowed to access IPA realm.
We also should really use 'cn' of the entry as domain name.
ipaNTTrustPartner has different meaning on wire, it is an index
pointing to the parent domain of the domain and will be 0 for top
level domains or disjoint subdomains of the trust.
Finally, trustdomain-enable and trustdomain-disable commands should
force MS-PAC cache re-initalization in case of black list change.
Trigger that by asking for cross-realm TGT for HTTP service.
When client principal requests for a ticket for a server principal
and we have to perform transition, check that all three belong to either
our domain or the domains we trust through forest trusts.
In case all three realms (client, transition, and server) match
trusted domains and our domain, issue permission to transition from client
realm to server realm.
Part of https://fedorahosted.org/freeipa/ticket/3909
We don't store trust type, attributes, and direction for subdomains
of the existing trust. Since trust is always forest level, these parameters
can be added as defaults when they are missing.
Since FreeIPA KDC supports adding MS-PAC to HTTP/ipa.server principal,
it is possible to use it when talking to the trusted AD DC.
Remove support for authenticating as trust account because it should not
really be used other than within Samba.
Add IPA CLI to manage trust domains.
ipa trust-fetch-domains <trust> -- fetch list of subdomains from AD side and add new ones to IPA
ipa trustdomain-find <trust> -- show all available domains
ipa trustdomain-del <trust> <domain> -- remove domain from IPA view about <trust>
ipa trustdomain-enable <trust> <domain> -- allow users from trusted domain to access resources in IPA
ipa trustdomain-disable <trust> <domain> -- disable access to resources in IPA from trusted domain
By default all discovered trust domains are allowed to access IPA resources
IPA KDC needs also information for authentication paths to subdomains in case they
are not hierarchical under AD forest trust root. This information is managed via capaths
section in krb5.conf. SSSD should be able to generate it once
ticket https://fedorahosted.org/sssd/ticket/2093 is resolved.
part of https://fedorahosted.org/freeipa/ticket/3909
Use realmdomains information to prepopulate forest trust info. As result,
all additional domains should now be enabled from the beginning, unless they
really conflict with existing DNS domains on AD side.
https://fedorahosted.org/freeipa/ticket/3919
We store Kerberos realm configuration in cn=REALM,cn=kerberos,$SUFFIX.
Along other configuration options, this container has list of default
supported encryption types, in krbDefaultEncSaltTypes.
Fetch krbDefaultEncSaltTypes value on ipa-sam initialization and convert
discovered list to the mask of supported encryption types according to
security.idl from Samba:
typedef [public,bitmap32bit] bitmap {
KERB_ENCTYPE_DES_CBC_CRC = 0x00000001,
KERB_ENCTYPE_DES_CBC_MD5 = 0x00000002,
KERB_ENCTYPE_RC4_HMAC_MD5 = 0x00000004,
KERB_ENCTYPE_AES128_CTS_HMAC_SHA1_96 = 0x00000008,
KERB_ENCTYPE_AES256_CTS_HMAC_SHA1_96 = 0x00000010
} kerb_EncTypes;
Part of https://fedorahosted.org/freeipa/ticket/3898
We used to handle some of code paths to free memory allocated by the LDAP library
but there are few more unhandled. In addition, search result wasn't freed on successful
initialization, leaking for long time.
https://fedorahosted.org/freeipa/ticket/3913
When trust is established, last step done by IPA framework is to set
encryption types associated with the trust. This operation fails due
to ipa-sam attempting to modify object classes in trust object entry
which is not allowed by ACI.
Additionally, wrong handle was used by dcerpc.py code when executing
SetInformationTrustedDomain() against IPA smbd which prevented even to
reach the point where ipa-sam would be asked to modify the trust object.
Attempt to resolve SIDs through SSSD first to avoid using trust
account password. This makes possible to run HBAC test requests
without being in 'trusted admins' group.
https://fedorahosted.org/freeipa/ticket/3803
When trust is established, we also create idrange for the trusted domain.
With FreeIPA 3.3 these ranges can have different types, and in order to
detect which one is to create, we need to do lookup at AD LDAP server.
Such lookup requires authenticated bind. We cannot bind as user because
IPA framework operates under constrained delegation using the user's
credentials and allowing HTTP/ipa.server@REALM to impersonate the user
against trusted domain's services would require two major things:
- first, as we don't really know exact AD LDAP server names (any AD DC
can be used), constrained delegation would have to be defined against
a wild-card
- second, constrained delegation requires that target principal exists
in IPA LDAP as DN.
These two together limit use of user's ticket for the purpose of IPA
framework looking up AD LDAP.
Additionally, immediately after trust is established, issuing TGT with
MS-PAC to HTTP/ipa.server@REALM may fail due to the fact that KDB driver
did not yet refreshed its list of trusted domains -- we have limited
refresh rate of 60 seconds by default.
This patch makes possible to force re-initialization of trusted domains'
view in KDB driver if we are asked for TGT for HTTP/ipa.server@REALM.
We will need to improve refresh of trusted domains' view in KDB driver
in future to notice changes in cn=etc,$SUFFIX tree automatically.
This improvement is tracked in https://fedorahosted.org/freeipa/ticket/1302 and
https://fedorahosted.org/freeipa/ticket/3626
Part of https://fedorahosted.org/freeipa/ticket/3649
We need KDC hostname for several purposes:
- short-circuit detection of principals on the same server as KDC
- generating NetBIOS name
Make sure we cache hostname information on startup and use it
instead of detecting the hostname in run-time. This will miss the
case that KDC hostname got changed but such cases are not supported
anyway without restarting KDC and making changes to principals.
Enables support for trusted domains users for old clients through Schema
Compatibility plugin. SSSD supports trusted domains natively starting with
version 1.9 platform. For platforms that lack SSSD or run older SSSD version
one needs to use this option. When enabled, slapi-nis package needs to
be installed and schema-compat-plugin will be configured to provide lookup of
users and groups from trusted domains via SSSD on IPA server. These users and
groups will be available under cn=users,cn=compat,$SUFFIX and
cn=groups,cn=compat,$SUFFIX trees. SSSD will normalize names of users and
groups to lower case.
In addition to providing these users and groups through the compat tree,
this option enables authentication over LDAP for trusted domain users with DN
under compat tree, i.e. using bind DN uid=administrator@ad.domain,cn=users,cn=compat,$SUFFIX.
This authentication is related to PAM stack using 'system-auth' PAM
service. If you have disabled HBAC rule 'allow_all', then make sure there is
special service called 'system-auth' created and HBAC rule to allow access to
anyone to this rule on IPA masters is added. Please note that system-auth PAM
service is not used directly by any other application, therefore it is safe to
create one specifically to support trusted domain users via compatibility path.
https://fedorahosted.org/freeipa/ticket/3567
MS-PAC is required to be present in TGT if one wants to connect to
AD services using this TGT. Users get MS-PAC by default, SSSD in
ipa_server_mode uses host/fqdn@REALM principal to talk to AD LDAP.
This patch enables other services running on IPA master to connect
to AD services. This is required for IPA python code doing discovery
of remote AD domain settings shortly after IPA-AD trust has been
established.
extdom plugin handles external operation over which SSSD asks IPA server about
trusted domain users not found through normal paths but detected to belong
to the trusted domains associated with IPA realm.
SSSD expects that user or group name in the response will be unqualified
because domain name for the user or group is also included in the response.
Strip domain name from the name if getgrnam_r/getpwnam_r calls returned fully
qualified name which includes the domain name we are asked to handle.
The code already expects that fully-qualified names are following user@domain
convention so we are simply tracking whether '@' symbol is present and is followed
by the domain name.
Introduce new command, 'trust-resolve', to aid resolving SIDs to names
in the Web UI.
The command uses new SSSD interface, nss_idmap, to resolve actual SIDs.
SSSD caches resolved data so that future requests to resolve same SIDs
are returned from a memory cache.
Web UI code is using Dojo/Deferred to deliver result of SID resolution
out of band. Once resolved names are available, they replace SID values.
Since Web UI only shows ~20 records per page, up to 20 SIDs are resolved
at the same time. They all sent within the single request to the server.
https://fedorahosted.org/freeipa/ticket/3302
Find out Kerberos middle version to infer ABI changes in DAL driver.
We cannot load DAL driver into KDC with wrong ABI. This is also needed to
support ipa-devel repository where krb5 1.11 is available for Fedora 18.
PASSDB API in Samba adds support for specifying UPN suffixes. The change
in ipasam will allow to pass through list of realm domains as UPN suffixes
so that Active Directory domain controller will be able to recognize
non-primary UPN suffixes as belonging to IPA and properly find our KDC
for cross-realm TGT.
Since Samba already returns primary DNS domain separately, filter it out
from list of UPN suffixes.
Also enclose provider of UPN suffixes into #ifdef to support both
Samba with and without pdb_enum_upn_suffixes().
Part of https://fedorahosted.org/freeipa/ticket/2848
The problem is the ca_status() uses an HTTP GET operation to check Dogtag's
status. Under some circumstances Dogtag may take a long time to respond, so the
HTTP GET may time out much earlier than 2 minutes. And since the above code
doesn't catch the exception, the whole loop fails immediately, so it doesn't
wait for a full 2 minutes as expected.
https://fedorahosted.org/freeipa/ticket/3492
Since we use associatedDomain attribute to store information about UPN suffixes
and our own domain, searching subtree is going to return more than one entry.
Limit search for own domain by base scope as we only need to fetch our own
domain information here, not UPN suffixes.
Required for https://fedorahosted.org/freeipa/ticket/2945
Define post-update plugin to upload public CA certificate to IPA LDAP server.
The plugin includes also update file that creates default container for the
certificate.
Windows 2012 Server changed procedure how KERB_VALIDATION_INFO ([MS-PAC]
section 2.5) is populated. Detailed description is available in [MS-KILE]
version 25.0 and above.
Refactor KERB_VALIDATION_INFO verification and ensure we filter out extra
SIDs in case they belong to our domain.
https://fedorahosted.org/freeipa/ticket/3231
When using Global Catalog for resolving users and groups, one needs
to authenticate against Active Directory DC using GSSAPI. Obtaining
Kerberos ticket might fail. Make sure the failure message is actually
returned to the user so that decision can be made about the source
of issue.
https://fedorahosted.org/freeipa/ticket/3265
python-crypto package is not available everywhere, use m2crypto instead.
Originally we thought to extend python-krbV to provide krb5_c_encrypt()
wrapper but m2crypto is readily available.
https://fedorahosted.org/freeipa/ticket/3271
Since trust-add re-establishes the trust every time it is run and all the other
information fetched from the remote domain controller stays the same, it
can be run multiple times. The only change would occur is update of
trust relationship credentials -- they are supposed to be updated
periodically by underlying infrastructure anyway.
A sequence is following:
1. Match external member against existing trusted domain
2. Find trusted domain's domain controller and preferred GC hosts
3. Fetch trusted domain account auth info
4. Set up ccache in /var/run/ipa_memcached/krb5cc_TD<domain> with principal ourdomain$@trusted.domain
5. Do LDAP SASL interactive bind using the ccache
6. Search for the member's SID
7. Decode SID
8. Replace external member name by SID
We don't use smbpasswd when configuring IPA for AD trusts anymore
because we switched to use Kerberos authentication in IPA passdb
backend based on CIFS service keytab.
https://fedorahosted.org/freeipa/ticket/3181
When long additional text should follow the error message, one can
supply instructions parameter to a class derived from PublicError.
This will cause following text added to the error message:
Additional instructions:
<additional text>
`instructions' optional parameter could be a list or anything that coerces
into unicode(). List entries will be joined with '\n'.
https://fedorahosted.org/freeipa/ticket/3167
Since use of winbind on FreeIPA server that is configured with trusts is
conflicting with krb5 locator based on winbind, use alternatives mechanism
to turn off the locator plugin by symlinking it to /dev/null.
https://fedorahosted.org/freeipa/ticket/3102
Since CIFS principal is generated by ipa-adtrust-install and is only
usable after setting CIFS configuration, there is no need to include it
into default setup.
This should fix upgrades from 2.2 to 3.0 where CIFS principal does not
exist by default.
https://fedorahosted.org/freeipa/ticket/3041
Establishing trust implies discovery of the trusted domain's domain controller via DNS.
If DNS discovery is not possible, NotFound exception is raised.
Intercept the exception and process it to help diagnose and fix actual problem:
- if IPA is managing DNS, suggest to make a forward for the domain's zone
- otherwise suggest to setup DNS forwarder at upstream DNS server
https://fedorahosted.org/freeipa/ticket/3103
This strange patch is to accomodate both python-ldap 2.3 and later versions.
There was refactoring in python-ldap support for LDAP controls that split
base class into two different, changing properties and method signatures.
Luckily, we don't use any values passed to encodeControlValue.
Since we only can perform verification when AD admin credentials are available,
report that trust should be verified from the AD side in other cases,
including unsuccessful verification.
Once trust is added, status of it is never stored anywhere.
https://fedorahosted.org/freeipa/ticket/2763
The credentials of the admin user will be used to obtain Kerberos ticket before
configuring cross-realm trusts support and afterwards, to ensure that the
ticket contains MS-PAC information required to actually add a trust with Active
Directory domain via 'ipa trust-add --type=ad' command.
https://fedorahosted.org/freeipa/ticket/2852
With this change ipasam is able to ask for ipaNTHash generation and if
corresponding Kerberos key is available, will be able to retrieve generated ipaNTHash.
Part 1 of https://fedorahosted.org/freeipa/ticket/3016
When developing and testing in the same environment, multiple re-installs
may be needed. This means previously issued and cached Kerberos credentials
will become invalid upon new install.
ipasam passdb module for Samba uses Kerberos authentication when talking to
IPA LDAP server. Obtained Kerberos credentials are cached during their lifetime.
However, the ccache is not removed automatically and if IPA setup is made
again, cached credentials are used, only to discover that they are invalid.
With this change invalid correctly obtained cached credentials are recognized
and, if LDAP SASL bind fails, new credentials are requested from the KDC.
https://fedorahosted.org/freeipa/ticket/3009
Translate exceptions produced by DCERPC bindings when establishing trusts.
There are two types of errors that may be produced by DCERPC bindings:
- RuntimeError with a text (RuntimeError('NT_STATUS_OBJECT_NAME_NOT_FOUND')
- RuntimeError with a numeric code and 'friendly' message
Error codes could have two prefixes:
- NT error codes, start with NT_STATUS_ prefix
- Windows error codes, start with WERR_ prefix
Full list of errors is available in Samba source code:
libcli/util/ntstatus.h: NT_STATUS error codes
libcli/util/werror.h: Windows error codes
Majority of errors returned when dealing with trusts are of NT_STATUS type,
these also include all typical POSIX errors mapped to corresponding NT errors.
Unfortunately, in the textual RuntimeError case very little can be done to
get better clarification of the error. More error paths will need to be added
as they will be discovered -- DCERPC error messaging is complex.
https://fedorahosted.org/freeipa/ticket/2868
When setting up AD trusts support, ipa-adtrust-install utility
needs to be run as:
- root, for performing Samba configuration and using LDAPI/autobind
- kinit-ed IPA admin user, to ensure proper ACIs are granted to
fetch keytab
As result, we can get rid of Directory Manager credentials in ipa-adtrust-install
https://fedorahosted.org/freeipa/ticket/2815
There are two problems in task naming in LDAP updates:
1. Randomness may be scarce in virtual machines
2. Random number is added to the time value rounded to a second
The second issue leads to values that may repeat themselves as time
only grows and random number is non-negative as well, so
t2+r2 can be equal to t1+t2 generated earlier.
Since task name is a DN, there is no strict requirement to use an integer value.
Instead, we generate an UUID and use its 60-bit time, 14-bit sequential number,
and attribute name.
https://fedorahosted.org/freeipa/ticket/2942
With c43505b621725c9a754f0ee98318d451b093f2ed in samba git master
the function sid_check_is_domain() was renamed to sid_check_is_our_sam().
https://fedorahosted.org/freeipa/ticket/2929
Realm administrator account may be specified using different form:
Administrator, DOM\Administrator, Administrator@DOMAIN
This patch introduces handling of the second two forms:
- In DOM\Administrator only user name is used, short domain name
is then taken from a discovered record from the AD DC
- In Administrator@DOMAIN first DOMAIN is verified to be the same
as the domain we are establishing trust to, and then user name
is taken, together with short domain name taken from a discovered
record from the AD DC
Note that we do not support using to-be-trusted domain's trusted domains'
accounts to establish trust as there is basically zero chance to verify
that things will work with them. In addition, in order to establish trust
one needs to belong to Enterprise Admins group in AD or have specially
delegated permissions. These permissions are unlikely delegated to the
ones in already trusted domain.
https://fedorahosted.org/freeipa/ticket/2864
SASL bind callback due to refactoring was referencing local variable which
didn't exist all the time. Fix that by including a copy of service principals
into ipasam long term private struct.
Rework ccache handling to avoid re-initing every time callback is called
When using ipaExternalGroup/ipaExternalMember attributes it is
possible to add group members which don't exist in IPA database.
This is primarily is required for AD trusts support and therefore
validation is accepting only secure identifier (SID) format.
https://fedorahosted.org/freeipa/ticket/2664
We have two SID attributes, ipaNTSecurityIdentifier and ipaNTTrustedDomainSID.
First is used for recording SID of our users/groups, second is to store
SID of a remote trusted domain.
We should restart Directory Server when performing AD trusts configuration
to enable new CLDAP plugin and force KDC to notice MS PAC is now available.
Previously we only restarted KDC but if dirsrv is restarted, KDC will notice
its socket disappeared and will refresh itself
http://fedorahosted.org/freeipa/ticket/2862
DCERPC code in AD trusts implementation depends on Samba 4 Python bindings.
Make this dependency optional for main freeipa-server package by moving
the dependency to freeipa-server-trust-ad subpackage.
Main interface to AD trusts (ipalib/plugins/trust.py) will still stay,
as well as LDIF files and updates as they are not causing real dependency.
https://fedorahosted.org/freeipa/ticket/2821
Alexander Bokovoy