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/** BEGIN COPYRIGHT BLOCK
* 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; version 2 of the License.
*
* 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, write to the Free Software Foundation, Inc., 59 Temple
* Place, Suite 330, Boston, MA 02111-1307 USA.
*
* In addition, as a special exception, Red Hat, Inc. gives You the additional
* right to link the code of this Program with code not covered under the GNU
* General Public License ("Non-GPL Code") and to distribute linked combinations
* including the two, subject to the limitations in this paragraph. Non-GPL Code
* permitted under this exception must only link to the code of this Program
* through those well defined interfaces identified in the file named EXCEPTION
* found in the source code files (the "Approved Interfaces"). The files of
* Non-GPL Code may instantiate templates or use macros or inline functions from
* the Approved Interfaces without causing the resulting work to be covered by
* the GNU General Public License. Only Red Hat, Inc. may make changes or
* additions to the list of Approved Interfaces. You must obey the GNU General
* Public License in all respects for all of the Program code and other code used
* in conjunction with the Program except the Non-GPL Code covered by this
* exception. If you modify this file, you may extend this exception to your
* version of the file, but you are not obligated to do so. If you do not wish to
* provide this exception without modification, you must delete this exception
* statement from your version and license this file solely under the GPL without
* exception.
*
*
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
/************************************************************
testentry.c
This source file provides examples of entry store and
entry fetch plug-in functions. These plug-in functions are
called by the server before writing an entry to disk and
after reading an entry from disk.
Entry store and entry fetch plug-in functions are passed
the string representation (in LDIF -- LDAP Data Interchange
Format) of the entry.
In this example, the entry store function performs a bitwise
exclusive-OR operation on each character in the entry
against the value 0xaa (10101010). The entry fetch
function performs this again to revert each character
back to its initial value.
NOTE: The Directory Server caches recently added and retrieved
entries in memory. The entry fetch plug-in function is called
only when reading the entry from the disk, *not* when reading
the entry from the cache.
For example, if you add an entry and search for it, you will
not see a message in the server error log indicating that
the entry fetch plug-in function was called. In the process
of adding the entry to the directory, the server also added
the entry to the cache; the server then reads the entry from
the cache instead of from the disk and does not need to call
the entry fetch plug-in function.
You can flush the cache by shutting down the server.
To test this plug-in function, stop the server, edit the dse.ldif file
(in the <server_root>/slapd-<server_id>/config directory)
and add the following lines before restarting the server :
dn: cn=Test entry,cn=plugins,cn=config
objectClass: top
objectClass: nsSlapdPlugin
objectClass: extensibleObject
cn: Test entry
nsslapd-pluginPath: <server_root>/plugins/slapd/slapi/examples/libtest-plugin.so
nsslapd-pluginInitfunc: testentry_init
nsslapd-pluginType: ldbmentryfetchstore
nsslapd-pluginEnabled: on
nsslapd-pluginId: test-entry
************************************************************/
#include <stdio.h>
#include <string.h>
#include "slapi-plugin.h"
Slapi_PluginDesc entrypdesc = { "test-entry", "Fedora Project", "1.0.4",
"sample entry modification plugin" };
/* Entry store plug-in function */
#ifdef _WIN32
__declspec(dllexport)
#endif
int
testentry_scramble( char **entry, unsigned long *len )
{
unsigned long i;
/* Log an entry to the server's error log file whenever
this function is called. */
slapi_log_error( SLAPI_LOG_PLUGIN, "testentry_scramble",
"Entry data scrambled.\n" );
/* Perform a bitwise exclusive-OR operation on each
character in the entry. */
for ( i = 0; i < *len - 1; i++ ) {
(*entry)[i] ^= 0xaa;
}
return( 0 );
}
/* Entry fetch plug-in function */
#ifdef _WIN32
__declspec(dllexport)
#endif
int
testentry_unscramble( char **entry, unsigned long *len )
{
unsigned long i;
/* Some entries will not be scrambled, so check if the entry is
scrambled before attempting to unscramble the entry. */
if ( !strncmp( *entry, "dn:", 3 ) ) {
return( 0 );
}
/* Perform a bitwise exclusive-OR operation on each
character in the entry. */
for ( i = 0; i < *len - 1; i++ ) {
(*entry)[i] ^= 0xaa;
}
slapi_log_error( SLAPI_LOG_PLUGIN, "testentry_unscramble",
"Entry data unscrambled.\n");
return( 0 );
}
int
testentry_init(Slapi_PBlock *pb)
{
/* Register the store/fetch functions and specify
the server plug-in version. */
if ( slapi_pblock_set( pb, SLAPI_PLUGIN_VERSION,
SLAPI_PLUGIN_VERSION_01 ) != 0 ||
slapi_pblock_set( pb, SLAPI_PLUGIN_DESCRIPTION,
(void *)&entrypdesc ) != 0 ||
slapi_pblock_set( pb, SLAPI_PLUGIN_ENTRY_FETCH_FUNC,
(void *) testentry_unscramble ) != 0 ||
slapi_pblock_set( pb, SLAPI_PLUGIN_ENTRY_STORE_FUNC,
(void *) testentry_scramble ) != 0 ) {
slapi_log_error( SLAPI_LOG_PLUGIN, "testentry_init",
"Failed to set version and functions\n" );
return( -1 );
}
return 0;
}
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