Configure SyncRepl (OpenLDAP replication) and related ACLs.

The clients are identified using their certificate, and connect securely
to the SyncProv.

There are a few workarounds (XXX) in the ACLs due to Postfix not
supporting SASL binds in Wheezy.
Overview:
  - Authentication (XXX: strong authentication) is required prior to any DIT
    operation (see 'olcRequires').
  - We force a Security Strength Factor of 128 or above for all operations (see
    'olcSecurity'), meaning one must use either a local connection (eg,
    ldapi://, possible since we set the 'olcLocalSSF' to 128), or TLS with at
    least 128 bits of security.
  - XXX: Services may not simple bind other than locally on a ldapi:// socket.
    If no remote access is needed, they should use SASL/EXTERNAL on a ldapi://
    socket whenever possible (if the service itself supports SASL binds).
    If remote access is needed, they should use SASL/EXTERNAL on a ldaps://
    socket, and their identity should be derived from the CN of the client
    certificate only (hence services may not simple bind).
  - Admins have restrictions similar to that of the services.
  - User access is only restricted by our global 'olcSecurity' attribute.

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/modules/openldap b/lib/modules/openldap
index 3f6ea39..0f0bc9a 100644
--- a/lib/modules/openldap
+++ b/lib/modules/openldap
@@ -20,40 +20,41 @@ import ldap, ldap.sasl
 from ldap.filter  import filter_format
 from ldap.dn      import dn2str,explode_dn,str2dn
 from ldap.modlist import addModlist
 from ldif         import LDIFParser
 from functools    import partial
 import re, pwd
 import tempfile, atexit
 
 
 # Dirty hack to check equality between the targetted LDIF and that
 # currently in the directory.  The value of some configuration (olc*)
 # attributes is automatically indexed when added; for those we'll add
 # explicit indices to what we find in the LDIF.
 indexedAttributes = frozenset([
     'olcAttributeTypes',
     'olcObjectClasses',
     'olcAccess',
     'olcSyncrepl',
     'olcOverlay',
     'olcLimits',
+    'olcAuthzRegexp',
 ])
 
 
 # Another hack. Configuration entries sometimes pollutes the DNs with
 # indices, thus it's not possible to directly use them as base.
 # Instead, we use their parent as a pase, and search for the *unique*
 # match with the same ObjectClass and the matching extra attributes.
 # ('%s' in the attribute value is replaced with the value of the source
 # entry.)
 indexedDN = {
     'olcSchemaConfig':  [('cn',             '{*}%s')],
     'olcHdbConfig':     [('olcDbDirectory', '%s'   )],
     'olcOverlayConfig': [('olcOverlay',     '%s'   )],
 }
 
 # Allow for flexible ACLs for user using SASL's EXTERNAL mechanism.
 # "username=postfix,cn=peercred,cn=external,cn=auth" is replaced by
 # "gidNumber=106+uidNumber=102,cn=peercred,cn=external,cn=auth" where
 # 102 is postfix's UID and 106 its primary GID.
 # (Regular expressions are not allowed.)