The user and group lookups done by the extdom plugin might need some
time depending on the state of the service (typically SSSD) handling the
requests.
To avoid that all worker threads are busy waiting on a connect or a
reply from SSSD and no other request can be handled this patch adds an
instance counter and an instance limit for the extdom plugin.
By default the limit will be around 80% of the number of worker threads.
It can be tuned further with the plugin option ipaExtdomMaxInstances
which must in set in ipaextdommaxinstances and should have an integer
value larger than 0 and lesser than the number of worker threads.
If the instance limit is reached the extdom plugin will return LDAP_BUSY
for every new request until the number of instance is again below the
limit.
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Recent Samba versions removed some header files which did include
non-public APIs. As a result talloc_strackframe.h and memory.h (for
SAFE_FREE) are not available anymore. This patch replaces the use of the
non-public APIs with public ones.
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: François Cami <fcami@redhat.com>
Currently there is already code to make sure that after trust is established an
AS-REQ of the local HTTP principal causes a refresh of the internal structures
holding the information about the trusted domains.
But this refreshes only the data of the current krb5kdc worker process on the
local host. Other workers and the KDCs on other hosts will update the data
eventually when a request with a principal from a trusted realm is handled.
During this phase, which might last quite long if remote principals are only
handled rarely, TGTs for local principals might or might not contain a PAC
because the decision if a PAC should be added or not is based on the
information about trusted domains. Since the PAC is needed to access services
on the AD side this access might fail intermittently depending which worker
process on which host is handling the request. This might e.g. affect SSSD
running on the IPA server with two-way trust.
To fix this this patch calls ipadb_reinit_mspac() whenever a PAC is needed but
without the 'force' flag so that the refresh will only happen if it wasn't
called recently (currently not more often than once a minute).
An alternative might be to do the refresh only when processing cross-realm TGT
requests. But this would be already too late because the local principal asking
for a cross-realm ticket would not have a PAC and hence the first attempt will
still fail due to the missing PAC. And injecting the PAC in the cross-realm TGT
while there is none in the requesting ticket does not sound right.
Related to https://pagure.io/freeipa/issue/7351
Reviewed-By: Simo Sorce <ssorce@redhat.com>
The certauth plugin is configured in /etc/krb5.conf independently form
the database module. As a result the IPA certauth plugin can be added to
the configuration without the IPA DAL driver. Since the IPA certauth
plugin depends on the presence of the IPA DAL driver this patch adds a
magic value at the beginning of struct ipadb_context which can be
checked to see if the IPA DAL driver is properly initialized.
Resolves https://pagure.io/freeipa/issue/7261
Reviewed-By: Christian Heimes <cheimes@redhat.com>
Since ipa-sam is running as part of smbd is it safe to use the
E_md4hash() from Samba. This way ipa-sam does not depend on other crypto
libraries which might depend on other rules like e.g. FIPS mode.
Resolves https://pagure.io/freeipa/issue/7026
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>
Currently the certauth plugin use the unmodified principal from the
request to lookup the user. This might fail if e.g. enterprise
principals are use. With this patch the canonical principal form the kdc
entry is used.
Resolves https://pagure.io/freeipa/issue/6993
Reviewed-By: David Kupka <dkupka@redhat.com>
Architecture specific paths should be avoided in the global Kerberos
configuration because it is read e.g. by 32bit and 64bit libraries they
are installed in parallel.
Resolves https://pagure.io/freeipa/issue/6833
Reviewed-By: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Jan Cholasta <jcholast@redhat.com>
Certificates can be assigned to multiple user so the extdom plugin must
use sss_nss_getlistbycert() instead of sss_nss_getnamebycert() and
return a list of fully-qualified user names.
Due to issues on the SSSD side the current version of lookups by
certificates didn't work at all and the changes here won't break
existing clients.
Related to https://pagure.io/freeipa/issue/6826
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: David Kupka <dkupka@redhat.com>
To avoid issues which @-signs in the short user or group names it is
better to search for the domain separator starting at the end of the
fully-qualified name.
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: David Kupka <dkupka@redhat.com>
This patch add a certauth plugin which allows the IPA server to support
PKINIT for certificates which do not include a special SAN extension
which contains a Kerberos principal but allow other mappings with the
help of SSSD's certmap library.
Related to https://pagure.io/freeipa/issue/4905
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: David Kupka <dkupka@redhat.com>
This function determines which type of authorization data should be
added to the Kerberos ticket. There are global default and it is
possible to configure this per service as well. The second argument is
the data base entry of a service. If no service is given it makes sense
to return the global defaults and most parts of get_authz_data_types()
handle this case well and this patch fixes the remain issue and adds a
test for this as well.
Reviewed-By: Tomas Babej <tbabej@redhat.com>
Since endptr points to a location inside of dummy, dummy should be freed
only after dereferencing endptr.
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Since we are interested in looking up the SID of a group it makes sense
to include the objectclass which contains the SID attribute in the
search filter. This makes sure the group is not accidentally found a
second time in the compat tree.
Related to https://fedorahosted.org/freeipa/ticket/5457
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
The get*_r_wrapper() calls expect a maximum buffer size to avoid memory
shortage if too many threads try to allocate buffers e.g. for large
groups. With this patch this size can be configured by setting
ipaExtdomMaxNssBufSize in the plugin config object
cn=ipa_extdom_extop,cn=plugins,cn=config.
Related to https://fedorahosted.org/freeipa/ticket/4908
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
The getXXYYY_r() calls require a buffer to store the variable data of
the passwd and group structs. If the provided buffer is too small ERANGE
is returned and the caller can try with a larger buffer again.
Cmocka/cwrap based unit-tests for get*_r_wrapper() are added.
Resolves https://fedorahosted.org/freeipa/ticket/4908
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Currently only nss-wrapper is checked, checks for other crwap libraries
can be added e.g. as
AM_CHECK_WRAPPER(uid_wrapper, HAVE_UID_WRAPPER)
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Currently the range check plugin will return a 'Range Check error'
message if a ldapmodify operation tries to change a non-existing object.
Since the range check plugin does not need to care about non-existing
objects we can just return 0 indicating that the range check plugin has
done its work.
Resolves https://fedorahosted.org/freeipa/ticket/4924
Reviewed-By: Tomas Babej <tbabej@redhat.com>
Currently the extdom plugin is basically used to translate SIDs of AD
users and groups to names and POSIX IDs.
With this patch a new version is added which will return the full member
list for groups and the full list of group memberships for a user.
Additionally the gecos field, the home directory and the login shell of a
user are returned and an optional list of key-value pairs which
currently will contain the SID of the requested object if available.
https://fedorahosted.org/freeipa/ticket/4031
Reviewed-By: Jakub Hrozek <jhrozek@redhat.com>
For NETLOGON_NT_VERSION_5EX requests the prepended \\ is not expected in
the PDC NetBIOS name. In general AD seems to be smart enough to handle
the two \ signs. But if the NetBIOS name reaches the maximum of 15
character AD does not accept the responses anymore.
Fixes https://fedorahosted.org/freeipa/ticket/4028
There is a special mode to set the ipaNTHash attribute if a RC4 Kerberos
key is available for the corresponding user. This is typically triggered
by samba via the ipa_sam passdb plugin. The principal used by samba to
connect to the IPA directory server has the right to modify ipaNTHash
but no other password attribute. This means that the current check on
the userPassword attribute is too strict for this case and leads to a
failure of the whole operation.
With this patch the access right on ipaNTHash are checked if no other
password operations are requested.
Currently the CLDAP plugin determines the IPA domain name by reading
the current host name and splitting of the domain part. But since an IPA
server does not have to be in a DNS domain which has the same name as
the IPA domain this may fail. The domain name was used to search the
ipaNTDomainAttrs object, but since this object is unique in the tree it
is sufficient to use the objectclass in the search filter. Now the IPA
domain can be read from the ipaNTDomainAttrs object as well.
Fixes https://fedorahosted.org/freeipa/ticket/3941
With the new ipa_server_mode SSSD is able to read user and group data
from trusted AD domains directly and makes this data available via the
NSS responder. With this mode enabled winbind is not needed anymore to
lookup users and groups of trusted domains.
This patch removed the calls to winbind from the extdom plugin and
replaces them with standard POSIX calls like getpwnam() and calls from
libsss_nss_idmap to lookup SIDs.
Fixes https://fedorahosted.org/freeipa/ticket/3637 because now the
extdom plugin does not need to handle idranges anymore, but everything
is done inside SSSD.
For a proper SASL bind with GSSAPI against an AD LDAP server a PAC is
needed. To allow SSSD in ipa_server_mode to access the LDAP or GC server
of a trusted domain with the credentials of a FreeIPA server host a
PAC must be added to the TGT for the host.
We use the well know RID of the Domain Computers group (515) for the
primary gid element of the PAC, this is the same as AD uses for host
tickets. The rid element of the PAC is set to the well know RID of the
Domain Controllers group (516). This is working for the SSSD use case
but might be improved later for more general use cases.
To determine if a host is a FreeIPA server or not it is checked if there
is an entry for the host in cn=master,cn=ipa,cn=etc,$base. Unfortunately
this requires an additional LDAP lookup. But since TGS-REQs for hosts
should be rare I think it is acceptable for the time being.
Fixes https://fedorahosted.org/freeipa/ticket/3651
Request with a SID as input parameter do not contain the domain name,
hence is must be tried to resolve the SID first before the corresponding
domain can be looked up.
https://fedorahosted.org/freeipa/ticket/3596
cmocka is a more advanced unit test framework for C-code than the
currently used check framework. This patch adds configure checks and
makefile variables so that new unit tests can use cmocka.
Fixes https://fedorahosted.org/freeipa/ticket/3434
This patch adds 'nfs:NONE' as an allowed entry for the global
authorization data type in the CLI and WebUI. This is an ad-hoc solution
to make sure that the new default value for the NFS service is not
removed by chance.
This patch should be removed if a more generic solution is implemented
to modify service:TYPE style values of the authorization data type.
https://fedorahosted.org/freeipa/ticket/2960
Instead of always adding a PAC to the Kerberos ticket the global default
for the authorization data and the authorization data of the service
entry is evaluated and the PAC is added accordingly.
https://fedorahosted.org/freeipa/ticket/2960
The ipaKrbAuthzData LDAP attribute is read together with the other data
of the requestedprincipal and the read value(s) are stored in the e-data
of the entry for later use.
https://fedorahosted.org/freeipa/ticket/2960
Since the hardcoded default fpr the NFS service was removed the default
authorization data type is now set in the global server configuration.
https://fedorahosted.org/freeipa/ticket/2960
Currently kdb5kdc crashes on exit if the ipadb KDB modules is loaded and trusts
are configured. The reason is the talloc autofree context which get initialised
during the ndr_push_union_blob() call. On exit the KDC module is unloaded an
later on atexit() tries to free the context, but all related symbols are
already unloaded with the module.
This patch frees the talloc autofree context during the cleanup routine of the
module. Since this is called only at exit and not during normal operations this
is safe even if other KDC plugins use the talloc autofree context, e.g. via
some Samba libraries, as well.
Fixes https://fedorahosted.org/freeipa/ticket/3410
The best way to configure DNS depends on the environment and no general
recommendations should be given by the CLI or Web UI. Especially
forwarders should not be recommended by only be option of last resort.
Fixes https://fedorahosted.org/freeipa/ticket/3261
Recent versions of authconfig do not restart sssd if only the
--enablesssd and --enablesssdauth options are used. To make sure sssd is
running after ipa-server-install is run this patch add an unconditional
restart of sssd after authconfig is run during the installation.
Since there already is some logic trying to determine if sssd needs to
be restarted or stopped if freeipa in uninstalled no changes are needed
here.
Fixes https://fedorahosted.org/freeipa/ticket/3267
Currently only the group SIDs from a PAC are used to find out about the
membership in local groups. This patch adds the user SID to the list.
Fixes https://fedorahosted.org/freeipa/ticket/3257
If ipa-server-trust-ad is installed after the ipa server is installed
and configured, httpd needs a restart for additional python modules to
be loaded into httpd on IPA initialization.
Fixes https://fedorahosted.org/freeipa/ticket/3185
Currently the data about trusted domains is read once at startup. If a
new trust is added the KDC must be restarted to know about the new
trust. This patch reloads the trust data if there is a request from an
unknown domain. To make DOS attacks a bit harder the data can be updated
only once in a minute.
Fixes https://fedorahosted.org/freeipa/ticket/3156
Currently the framework is used to add the group but we want to avoid
that users are added explicitly to the group by removing the
objectclasses groupofnames, ipausergroup and nestedgroup and we want to
use a name with spaces in it. Both it not easy possible with the
framework, a LDIF file is used instead to create the group.
Fixes https://fedorahosted.org/freeipa/ticket/3147
Sumit Bose
sbose