Refactor nsswitch operations in ipa-extdom-extop plugin to allow use
of timeout-enabled nsswitch calls provided by libsss_nss_idmap.
Standard POSIX nsswitch API has no way to cancel requests which may
cause ipa-extdom-extop requests to hang far too long and potentially
exhaust LDAP server workers. In addition, glibc nsswitch API iterates
through all nsswitch modules one by one and with multiple parallel
requests a lock up may happen in an unrelated nsswitch module like
nss_files.so.2.
A solution to the latter issue is to directly load nss_sss.so.2 plugin
and utilize it. This, however, does not solve a problem with lack of
cancellable API.
With SSSD 1.16.1, libsss_nss_idmap provides a timeout-enabled variant of
nsswitch API that is directly integrated with SSSD client side machinery
used by nss_sss.so.2. As result, this API can be used instead of loading
nss_sss.so.2 directly.
To support older SSSD version, both direct loading of nss_sss.so.2 and
new timeout-enabled API are supported by this changeset. An API to
abstract both is designed to be a mix between internal glibc nsswitch
API and external nsswitch API that libsss_nss_idmap mimics. API does not
expose per-call timeout. Instead, it allows to set a timeout per
nsswitch operation context to reduce requirements on information
a caller has to maintain.
A choice which API to use is made at configure time.
In order to test the API, a cmocka test is updated to explicitly load
nss_files.so.2 as a backend. Since use of nss_sss.so.2 would always
depend on availablility of SSSD, predictable testing would not be
possible without it otherwise. Also, cmocka test does not use
nss_wrapper anymore because nss_wrapper overrides higher level glibc
nsswitch API while we are loading an individual nsswitch module
directly.
As result, cmocka test overrides fopen() call used by nss_files.so.2 to
load /etc/passwd and /etc/group. An overridden version changes paths to
/etc/passwd and /etc/group to a local test_data/passwd and
test_data/group. This way we can continue testing a backend API for
ipa-extdom-extop with the same data as with nss_wrapper.
Fixes https://pagure.io/freeipa/issue/5464
Reviewed-By: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Simo Sorce <ssorce@redhat.com>
Reviewed-By: Robbie Harwood <rharwood@redhat.com>
Samba 4.7 tightens up smbldap API by making 'struct smbldap_state' an
opaque. This means ipa-sam module cannot anymore directly set its
LDAP bind callback.
Use new smbldap API to set the LDAP bind callback.
Fixes https://pagure.io/freeipa/issue/6877
Reviewed-By: Martin Basti <mbasti@redhat.com>
With Samba 4.7 access to ldapsam internal structures will not be
available for external applications. FreeIPA's ipasam module was using
those for own needs. Now it needs to migrate to proper own private
structure.
Given that we anyway need to implement many missing functions like
pdb_update_sam_account() callback with FreeIPA-specific logic,
piggybacking on ldapsam structures is not needed anymore.
Fixes https://pagure.io/freeipa/issue/6877
Reviewed-By: Martin Basti <mbasti@redhat.com>
Replace empty string with a single space in the third argument of
`AC_CHECK_LIB` (`action-if-found`) where applicable.
Empty string in the argument causes `AC_CHECK_LIB` to use the default
action when a library is found which includes adding the library to `LIBS`,
which specifies libraries to be linked in every binary and library in the
project.
This fixes libkrad, liblber, libldap_r and libsss_nss_idmap being linked to
every binary and library in IPA, even where unused.
https://pagure.io/freeipa/issue/6846
Reviewed-By: Stanislav Laznicka <slaznick@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>
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>
Add explicit NSPR_CFLAGS and NSS_CFLAGS where NSPR_LIBS and NSS_LIBS is
used.
Use DIRSRV_CFLAGS rather than hardcode -I/usr/include/dirsrv.
Append NSPR_CFLAGS to DIRSRV_CFLAGS in ./configure as slapi-plugin.h
includes nspr.h.
Reviewed-By: Pavel Vomacka <pvomacka@redhat.com>
