Adding upstream version 2.6.7+dfsg.upstream/2.6.7+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

4 files changed, 1437 insertions, 0 deletions

diff --git a/contrib/slapd-modules/smbk5pwd/Makefile b/contrib/slapd-modules/smbk5pwd/Makefile
new file mode 100644
index 0000000..76c8080
--- /dev/null
+++ b/contrib/slapd-modules/smbk5pwd/Makefile
@@ -0,0 +1,82 @@
+# $OpenLDAP$
+# This work is part of OpenLDAP Software <http://www.openldap.org/>.
+#
+# Copyright 1998-2022 The OpenLDAP Foundation.
+# Copyright 2004 Howard Chu, Symas Corp. All Rights Reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted only as authorized by the OpenLDAP
+# Public License.
+#
+# A copy of this license is available in the file LICENSE in the
+# top-level directory of the distribution or, alternatively, at
+# <http://www.OpenLDAP.org/license.html>.
+
+LDAP_SRC = ../../..
+LDAP_BUILD = $(LDAP_SRC)
+LDAP_INC = -I$(LDAP_BUILD)/include -I$(LDAP_SRC)/include -I$(LDAP_SRC)/servers/slapd
+LDAP_LIB = $(LDAP_BUILD)/libraries/libldap/libldap.la \
+	$(LDAP_BUILD)/libraries/liblber/liblber.la
+
+SSL_INC = 
+SSL_LIB = -lcrypto
+
+HEIMDAL_INC = -I/usr/heimdal/include
+HEIMDAL_LIB = -L/usr/heimdal/lib -lkrb5 -lkadm5srv
+
+PLAT = UNIX
+NT_LIB = -L$(LDAP_BUILD)/servers/slapd -lslapd
+NT_LDFLAGS = -no-undefined -avoid-version
+UNIX_LDFLAGS = -version-info $(LTVER)
+
+LIBTOOL = $(LDAP_BUILD)/libtool
+INSTALL = /usr/bin/install
+CC = gcc
+OPT = -g -O2
+# Omit DO_KRB5, DO_SAMBA or DO_SHADOW if you don't want to support it.
+DEFS = -DDO_KRB5 -DDO_SAMBA -DDO_SHADOW
+INCS = $(LDAP_INC) $(HEIMDAL_INC) $(SSL_INC)
+LIBS = $($(PLAT)_LIB) $(LDAP_LIB) $(HEIMDAL_LIB) $(SSL_LIB)
+LD_FLAGS = $(LDFLAGS) $($(PLAT)_LDFLAGS) -rpath $(moduledir) -module
+
+PROGRAMS = smbk5pwd.la
+MANPAGES = slapo-smbk5pwd.5
+LTVER = 0:0:0
+
+prefix=/usr/local
+exec_prefix=$(prefix)
+ldap_subdir=/openldap
+
+libdir=$(exec_prefix)/lib
+libexecdir=$(exec_prefix)/libexec
+moduledir = $(libexecdir)$(ldap_subdir)
+mandir = $(exec_prefix)/share/man
+man5dir = $(mandir)/man5
+
+.SUFFIXES: .c .o .lo
+
+.c.lo:
+	$(LIBTOOL) --mode=compile $(CC) $(CFLAGS) $(OPT) $(CPPFLAGS) $(DEFS) $(INCS) -c $<
+
+all: $(PROGRAMS)
+
+smbk5pwd.la:	smbk5pwd.lo
+	$(LIBTOOL) --mode=link $(CC) $(LD_FLAGS) -o $@ $? $(LIBS)
+
+clean:
+	rm -rf *.o *.lo *.la .libs
+
+install: install-lib install-man FORCE
+
+install-lib: $(PROGRAMS)
+	mkdir -p $(DESTDIR)$(moduledir)
+	for p in $(PROGRAMS) ; do \
+		$(LIBTOOL) --mode=install cp $$p $(DESTDIR)$(moduledir) ; \
+	done
+
+install-man: $(MANPAGES)
+	mkdir -p  $(DESTDIR)$(man5dir)
+	$(INSTALL) -m 644 $(MANPAGES) $(DESTDIR)$(man5dir)
+
+FORCE:
+
diff --git a/contrib/slapd-modules/smbk5pwd/README b/contrib/slapd-modules/smbk5pwd/README
new file mode 100644
index 0000000..2f02195
--- /dev/null
+++ b/contrib/slapd-modules/smbk5pwd/README
@@ -0,0 +1,94 @@
+This directory contains a slapd overlay, smbk5pwd, that extends the
+PasswordModify Extended Operation to update Kerberos keys and Samba
+password hashes for an LDAP user.
+
+The Kerberos support is written for Heimdal using its hdb-ldap backend.
+If a PasswordModify is performed on an entry that has the krb5KDCEntry
+objectclass, then the krb5Key and krb5KeyVersionNumber will be updated
+using the new password in the PasswordModify request. Additionally, a
+new "{K5KEY}" password hash mechanism is provided. For krb5KDCEntries that
+have this hash specifier in their userPassword attribute, Simple Binds
+will be checked against the Kerberos keys of the Entry. No data is
+needed after the "{K5KEY}" hash specifier in the userPassword, it is
+looked up from the Entry directly.
+
+The Samba support is written using the Samba 3.0 LDAP schema. If a
+PasswordModify is performed on an entry that has the sambaSamAccount
+objectclass, then the sambaNTPassword and sambaPwdLastSet attributes
+will be updated accordingly.
+
+To use the overlay, add:
+
+	include <path to>/krb5-kdc.schema
+	include <path to>/samba.schema
+
+	moduleload <path to>smbk5pwd.so
+	...
+
+	database mdb
+	...
+	overlay smbk5pwd
+
+to your slapd configuration file. (You should obtain the necessary schema
+files from the Heimdal and/or Samba distributions. At this time, there
+are several known errors in these schema files that you will have to
+correct before they will load in slapd.  As of Samba 3.0 the schema looks
+fine as shipped.)
+
+All modules compiled in (i.e. krb5 and samba) are enabled; the statement
+
+	smbk5pwd-enable		<module>
+
+can be used to enable only the desired one(s); legal values for <module>
+are "krb5", "samba" and "shadow", if they are respectively enabled by defining
+DO_KRB5, DO_SAMBA and DO_SHADOW.
+
+The samba module also supports the
+
+	smbk5pwd-must-change	<seconds>
+
+which sets the "sambaPwdMustChange" attribute accordingly to force passwd
+expiry.  A value of 0 disables this feature.
+
+The overlay now supports table-driven configuration, and thus can be run-time
+loaded and configured via back-config.  The layout of the entry is
+
+	# {0}smbk5pwd, {1}bdb, config
+	dn: olcOverlay={0}smbk5pwd,olcDatabase={1}bdb,cn=config
+	objectClass: olcOverlayConfig
+	objectClass: olcSmbK5PwdConfig
+	olcOverlay: {0}smbk5pwd
+	olcSmbK5PwdEnable: krb5
+	olcSmbK5PwdEnable: samba
+	olcSmbK5PwdMustChange: 2592000
+
+which enables both krb5 and samba modules with a password expiry time
+of 30 days.
+
+The provided Makefile builds both Kerberos and Samba support by default.
+You must edit the Makefile to insure that the correct include and library
+paths are used. You can change the DEFS macro if you only want one or the
+other of Kerberos or Samba support.
+
+This overlay is only set up to be built as a dynamically loaded module.
+On most platforms, in order for the module to be usable, all of the 
+library dependencies must also be available as shared libraries.
+
+If you need to build the overlay statically, you will have to move it into the
+slapd/overlays directory and edit the Makefile and overlays.c to reference
+it. You will also have to define SLAPD_OVER_SMBK5PWD to SLAPD_MOD_STATIC,
+and add the relevant libraries to the main slapd link command.
+
+---
+This work is part of OpenLDAP Software <http://www.openldap.org/>.
+Copyright 2004-2022 The OpenLDAP Foundation.
+Portions Copyright 2004-2005 Howard Chu, Symas Corp. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted only as authorized by the OpenLDAP
+Public License.
+
+A copy of this license is available in the file LICENSE in the
+top-level directory of the distribution or, alternatively, at
+<http://www.OpenLDAP.org/license.html>.
+
diff --git a/contrib/slapd-modules/smbk5pwd/slapo-smbk5pwd.5 b/contrib/slapd-modules/smbk5pwd/slapo-smbk5pwd.5
new file mode 100644
index 0000000..c9a0162
--- /dev/null
+++ b/contrib/slapd-modules/smbk5pwd/slapo-smbk5pwd.5
@@ -0,0 +1,177 @@
+.TH SLAPO-SMBK5PWD 5 "RELEASEDATE" "OpenLDAP LDVERSION"
+.\" Copyright 2015-2022 The OpenLDAP Foundation All Rights Reserved.
+.\" Copying restrictions apply.  See COPYRIGHT/LICENSE.
+.\" $OpenLDAP$
+.SH NAME
+slapo-smbk5pwd \- Samba & Kerberos password sync overlay to slapd
+.SH SYNOPSIS
+ETCDIR/slapd.conf
+.RS
+.LP
+include
+.B "<path to>/krb5-kdc.schema"
+.LP
+include
+.B "<path to>/samba.schema"
+.LP
+moduleload
+.B smbk5pwd.so
+.LP
+ ...
+.LP
+database mdb
+.LP
+ ...
+.LP
+overlay
+.B smbk5pwd
+.RE
+
+.SH DESCRIPTION
+.LP
+The
+.B smbk5pwd
+overlay to
+.BR slapd (8)
+overloads the Password Modify Extended Operation (RFC 3062) to update
+Kerberos keys and Samba password hashes for an LDAP user, as well as
+updating password change related attributes for Kerberos, Samba and/or
+UNIX user accounts.
+.LP
+The Samba support is written using the Samba 3.0 LDAP schema;
+Kerberos support is written for Heimdal using its hdb-ldap backend.
+.LP
+Additionally, a new
+.B {K5KEY}
+password hash mechanism is provided.
+For
+.B krb5KDCEntry
+objects that have this scheme specifier in their
+.I userPassword
+attribute, Simple Binds will be checked against the Kerberos keys of the entry.
+No data is needed after the
+.B {K5KEY}
+scheme specifier in the
+.IR userPassword ,
+it is looked up from the entry directly.
+
+.SH CONFIGURATION
+The
+.B smbk5pwd
+overlay supports the following
+.B slapd.conf
+configuration options, which should appear after the
+.B overlay
+directive:
+.TP
+.BI smbk5pwd-enable " <module>"
+can be used to enable only the desired modules.
+Legal values for
+.I <module>
+are
+.LP
+.RS
+.TP
+.B krb5
+If the user has the
+.B krb5KDCEntry
+objectclass, update the
+.B krb5Key
+and
+.B krb5KeyVersionNumber
+attributes using the new password in the Password Modify operation,
+provided the Kerberos account is not expired.
+Exiration is determined by evaluating the
+.B krb5ValidEnd
+attribute.
+.TP
+.B samba
+If the user is a
+.B sambaSamAccount
+object, synchronize the
+.B sambaNTPassword
+to the password entered in the Password Modify operation, and update
+.B sambaPwdLastSet
+accordingly.
+.TP
+.B shadow
+Update the attribute
+.BR shadowLastChange ,
+if the entry has the objectclass
+.BR shadowAccount .
+.LP
+By default all modules compiled in are enabled.
+Setting the config statement restricts the enabled modules to the ones
+explicitly mentioned.
+.RE
+.TP
+.BI smbk5pwd-can-change " <seconds>"
+If the
+.B samba
+module is enabled and the user is a
+.BR sambaSamAccount ,
+update the attribute
+.B sambaPwdCanChange
+to point
+.I <seconds>
+into the future, essentially denying any Samba password change until then.
+A value of
+.B 0
+disables this feature.
+.TP
+.BI smbk5pwd-must-change " <seconds>"
+If the
+.B samba
+module is enabled and the user is a
+.BR sambaSamAccount ,
+update the attribute
+.B sambaPwdMustChange
+to point
+.I <seconds>
+into the future, essentially setting the Samba password expiration time.
+A value of
+.B 0
+disables this feature.
+.LP
+Alternatively, the overlay supports table-driven configuration,
+and thus can be run-time loaded and configured via back-config.
+
+.SH EXAMPLE
+The layout of a slapd.d based, table-driven configuration entry looks like:
+.LP
+.EX
+        # {0}smbk5pwd, {1}mdb, config
+        dn: olcOverlay={0}smbk5pwd,olcDatabase={1}mdb,cn=config
+        objectClass: olcOverlayConfig
+        objectClass: olcSmbK5PwdConfig
+        olcOverlay: {0}smbk5pwd
+        olcSmbK5PwdEnable: krb5
+        olcSmbK5PwdEnable: samba
+        olcSmbK5PwdMustChange: 2592000
+.EE
+.LP
+which enables both
+.B krb5
+and
+.B samba
+modules with a Samba password expiration time of 30 days (=
+.B 2592000
+seconds).
+
+.SH SEE ALSO
+.BR slapd.conf (5),
+.BR ldappasswd (1),
+.BR ldap (3),
+.LP
+"OpenLDAP Administrator's Guide" (http://www.OpenLDAP.org/doc/admin/)
+.LP
+
+.SH ACKNOWLEDGEMENTS
+This manual page has been written by Peter Marschall based on the
+module's README file written by Howard Chu.
+.LP
+.B OpenLDAP
+is developed and maintained by The OpenLDAP Project (http://www.openldap.org/).
+.B OpenLDAP
+is derived from University of Michigan LDAP 3.3 Release.
+
diff --git a/contrib/slapd-modules/smbk5pwd/smbk5pwd.c b/contrib/slapd-modules/smbk5pwd/smbk5pwd.c
new file mode 100644
index 0000000..642140d
--- /dev/null
+++ b/contrib/slapd-modules/smbk5pwd/smbk5pwd.c
@@ -0,0 +1,1084 @@
+/* smbk5pwd.c - Overlay for managing Samba and Heimdal passwords */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2004-2022 The OpenLDAP Foundation.
+ * Portions Copyright 2004-2005 by Howard Chu, Symas Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * Support for table-driven configuration added by Pierangelo Masarati.
+ * Support for sambaPwdMustChange and sambaPwdCanChange added by Marco D'Ettorre.
+ * Support for shadowLastChange added by SATOH Fumiyasu @ OSS Technology, Inc.
+ */
+
+#include <portable.h>
+
+#ifndef SLAPD_OVER_SMBK5PWD
+#define SLAPD_OVER_SMBK5PWD SLAPD_MOD_DYNAMIC
+#endif
+
+#ifdef SLAPD_OVER_SMBK5PWD
+
+#include <slap.h>
+#include <ac/errno.h>
+#include <ac/string.h>
+
+#include "slap-config.h"
+
+#ifdef DO_KRB5
+#include <lber.h>
+#include <lber_pvt.h>
+#include <lutil.h>
+
+/* make ASN1_MALLOC_ENCODE use our allocator */
+#define malloc	ch_malloc
+
+#include <krb5.h>
+#include <kadm5/admin.h>
+#include <hdb.h>
+
+#ifndef HDB_INTERFACE_VERSION
+#define	HDB_MASTER_KEY_SET	master_key_set
+#else
+#define	HDB_MASTER_KEY_SET	hdb_master_key_set
+#endif
+
+static krb5_context context;
+static void *kadm_context;
+static kadm5_config_params conf;
+static HDB *db;
+
+static AttributeDescription *ad_krb5Key;
+static AttributeDescription *ad_krb5KeyVersionNumber;
+static AttributeDescription *ad_krb5PrincipalName;
+static AttributeDescription *ad_krb5ValidEnd;
+static ObjectClass *oc_krb5KDCEntry;
+#endif
+
+#ifdef DO_SAMBA
+#ifdef HAVE_GNUTLS
+#include <nettle/md4.h>
+#elif HAVE_OPENSSL
+#include <openssl/md4.h>
+#else
+#error Unsupported crypto backend.
+#endif
+#include "ldap_utf8.h"
+
+static AttributeDescription *ad_sambaNTPassword;
+static AttributeDescription *ad_sambaPwdLastSet;
+static AttributeDescription *ad_sambaPwdMustChange;
+static AttributeDescription *ad_sambaPwdCanChange;
+static ObjectClass *oc_sambaSamAccount;
+#endif
+
+#ifdef DO_SHADOW
+static AttributeDescription *ad_shadowLastChange;
+static ObjectClass *oc_shadowAccount;
+#endif
+
+/* Per-instance configuration information */
+typedef struct smbk5pwd_t {
+	unsigned	mode;
+#define	SMBK5PWD_F_KRB5		(0x1U)
+#define	SMBK5PWD_F_SAMBA	(0x2U)
+#define	SMBK5PWD_F_SHADOW	(0x4U)
+
+#define SMBK5PWD_DO_KRB5(pi)	((pi)->mode & SMBK5PWD_F_KRB5)
+#define SMBK5PWD_DO_SAMBA(pi)	((pi)->mode & SMBK5PWD_F_SAMBA)
+#define SMBK5PWD_DO_SHADOW(pi)	((pi)->mode & SMBK5PWD_F_SHADOW)
+
+#ifdef DO_KRB5
+	/* nothing yet */
+#endif
+
+#ifdef DO_SAMBA
+	/* How many seconds before forcing a password change? */
+	time_t	smb_must_change;
+	/* How many seconds after allowing a password change? */
+	time_t  smb_can_change;
+#endif
+
+#ifdef DO_SHADOW
+	/* nothing yet */
+#endif
+} smbk5pwd_t;
+
+static const unsigned SMBK5PWD_F_ALL	=
+	0
+#ifdef DO_KRB5
+	| SMBK5PWD_F_KRB5
+#endif
+#ifdef DO_SAMBA
+	| SMBK5PWD_F_SAMBA
+#endif
+#ifdef DO_SHADOW
+	| SMBK5PWD_F_SHADOW
+#endif
+;
+
+static int smbk5pwd_modules_init( smbk5pwd_t *pi );
+
+#ifdef DO_SAMBA
+static const char hex[] = "0123456789abcdef";
+
+#define MAX_PWLEN 256
+#define	HASHLEN	16
+
+static void hexify(
+	const char in[HASHLEN],
+	struct berval *out
+)
+{
+	int i;
+	char *a;
+	unsigned char *b;
+
+	out->bv_val = ch_malloc(HASHLEN*2 + 1);
+	out->bv_len = HASHLEN*2;
+
+	a = out->bv_val;
+	b = (unsigned char *)in;
+	for (i=0; i<HASHLEN; i++) {
+		*a++ = hex[*b >> 4];
+		*a++ = hex[*b++ & 0x0f];
+	}
+	*a++ = '\0';
+}
+
+static void nthash(
+	struct berval *passwd,
+	struct berval *hash
+)
+{
+	/* Windows currently only allows 14 character passwords, but
+	 * may support up to 256 in the future. We assume this means
+	 * 256 UCS2 characters, not 256 bytes...
+	 */
+	char hbuf[HASHLEN];
+#ifdef HAVE_OPENSSL
+	MD4_CTX ctx;
+#elif defined(HAVE_GNUTLS)
+	struct md4_ctx ctx;
+#endif
+
+	if (passwd->bv_len > MAX_PWLEN*2)
+		passwd->bv_len = MAX_PWLEN*2;
+
+#ifdef HAVE_OPENSSL
+	MD4_Init( &ctx );
+	MD4_Update( &ctx, passwd->bv_val, passwd->bv_len );
+	MD4_Final( (unsigned char *)hbuf, &ctx );
+#elif defined(HAVE_GNUTLS)
+	md4_init( &ctx );
+	md4_update( &ctx, passwd->bv_len, (unsigned char *)passwd->bv_val );
+	md4_digest( &ctx, sizeof(hbuf), (unsigned char *)hbuf );
+#endif
+
+	hexify( hbuf, hash );
+}
+#endif /* DO_SAMBA */
+
+#ifdef DO_KRB5
+
+static int smbk5pwd_op_cleanup(
+	Operation *op,
+	SlapReply *rs )
+{
+	slap_callback *cb;
+
+	/* clear out the current key */
+	ldap_pvt_thread_pool_setkey( op->o_threadctx, smbk5pwd_op_cleanup,
+		NULL, 0, NULL, NULL );
+
+	/* free the callback */
+	cb = op->o_callback;
+	op->o_callback = cb->sc_next;
+	op->o_tmpfree( cb, op->o_tmpmemctx );
+	return 0;
+}
+
+static int smbk5pwd_op_bind(
+	Operation *op,
+	SlapReply *rs )
+{
+	/* If this is a simple Bind, stash the Op pointer so our chk
+	 * function can find it. Set a cleanup callback to clear it
+	 * out when the Bind completes.
+	 */
+	if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE ) {
+		slap_callback *cb;
+		ldap_pvt_thread_pool_setkey( op->o_threadctx,
+			smbk5pwd_op_cleanup, op, 0, NULL, NULL );
+		cb = op->o_tmpcalloc( 1, sizeof(slap_callback), op->o_tmpmemctx );
+		cb->sc_cleanup = smbk5pwd_op_cleanup;
+		cb->sc_next = op->o_callback;
+		op->o_callback = cb;
+	}
+	return SLAP_CB_CONTINUE;
+}
+
+static LUTIL_PASSWD_CHK_FUNC k5key_chk;
+static LUTIL_PASSWD_HASH_FUNC k5key_hash;
+static const struct berval k5key_scheme = BER_BVC("{K5KEY}");
+
+/* This password scheme stores no data in the userPassword attribute
+ * other than the scheme name. It assumes the invoking entry is a
+ * krb5KDCentry and compares the passed-in credentials against the
+ * krb5Key attribute. The krb5Key may be multi-valued, but they are
+ * simply multiple keytypes generated from the same input string, so
+ * only the first value needs to be compared here.
+ *
+ * Since the lutil_passwd API doesn't pass the Entry object in, we
+ * have to fetch it ourselves in order to get access to the other
+ * attributes. We accomplish this with the help of the overlay's Bind
+ * function, which stores the current Operation pointer in thread-specific
+ * storage so we can retrieve it here. The Operation provides all
+ * the necessary context for us to get Entry from the database.
+ */
+static int k5key_chk(
+	const struct berval *sc,
+	const struct berval *passwd,
+	const struct berval *cred,
+	const char **text )
+{
+	void *ctx, *op_tmp;
+	Operation *op;
+	int rc;
+	Entry *e;
+	Attribute *a;
+	krb5_error_code ret;
+	krb5_keyblock key;
+	krb5_salt salt;
+	hdb_entry ent;
+
+	/* Find our thread context, find our Operation */
+	ctx = ldap_pvt_thread_pool_context();
+
+	if ( ldap_pvt_thread_pool_getkey( ctx, smbk5pwd_op_cleanup, &op_tmp, NULL )
+		 || !op_tmp )
+		return LUTIL_PASSWD_ERR;
+	op = op_tmp;
+
+	rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
+	if ( rc != LDAP_SUCCESS ) return LUTIL_PASSWD_ERR;
+
+	rc = LUTIL_PASSWD_ERR;
+	do {
+		size_t l;
+		Key ekey = {0};
+
+		a = attr_find( e->e_attrs, ad_krb5PrincipalName );
+		if (!a ) break;
+
+		memset( &ent, 0, sizeof(ent) );
+		ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
+		if ( ret ) break;
+
+		a = attr_find( e->e_attrs, ad_krb5ValidEnd );
+		if (a) {
+			struct lutil_tm tm;
+			struct lutil_timet tt;
+			if ( lutil_parsetime( a->a_vals[0].bv_val, &tm ) == 0 &&
+				lutil_tm2time( &tm, &tt ) == 0 && tt.tt_sec < op->o_time ) {
+				/* Account is expired */
+				rc = LUTIL_PASSWD_ERR;
+				break;
+			}
+		}
+
+		krb5_get_pw_salt( context, ent.principal, &salt );
+		krb5_free_principal( context, ent.principal );
+
+		a = attr_find( e->e_attrs, ad_krb5Key );
+		if ( !a ) break;
+
+		ent.keys.len = 1;
+		ent.keys.val = &ekey;
+		decode_Key((unsigned char *) a->a_vals[0].bv_val,
+			(size_t) a->a_vals[0].bv_len, &ent.keys.val[0], &l);
+		if ( db->HDB_MASTER_KEY_SET )
+			hdb_unseal_keys( context, db, &ent );
+
+		krb5_string_to_key_salt( context, ekey.key.keytype, cred->bv_val,
+			salt, &key );
+
+		krb5_free_salt( context, salt );
+
+		if ( memcmp( ekey.key.keyvalue.data, key.keyvalue.data,
+			key.keyvalue.length ) == 0 ) rc = LUTIL_PASSWD_OK;
+
+		krb5_free_keyblock_contents( context, &key );
+		krb5_free_keyblock_contents( context, &ekey.key );
+
+	} while(0);
+	be_entry_release_r( op, e );
+	return rc;
+}
+
+static int k5key_hash(
+	const struct berval *scheme,
+	const struct berval *passwd,
+	struct berval *hash,
+	const char **text )
+{
+	ber_dupbv( hash, (struct berval *)&k5key_scheme );
+	return LUTIL_PASSWD_OK;
+}
+#endif /* DO_KRB5 */
+
+static int smbk5pwd_exop_passwd(
+	Operation *op,
+	SlapReply *rs )
+{
+	int rc;
+	req_pwdexop_s *qpw = &op->oq_pwdexop;
+	Entry *e;
+	Modifications *ml;
+	slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
+	smbk5pwd_t *pi = on->on_bi.bi_private;
+	char term;
+
+	/* Not the operation we expected, pass it on... */
+	if ( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) ) {
+		return SLAP_CB_CONTINUE;
+	}
+
+	op->o_bd->bd_info = (BackendInfo *)on->on_info;
+	rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
+	if ( rc != LDAP_SUCCESS ) return rc;
+
+	term = qpw->rs_new.bv_val[qpw->rs_new.bv_len];
+	qpw->rs_new.bv_val[qpw->rs_new.bv_len] = '\0';
+
+#ifdef DO_KRB5
+	/* Kerberos stuff */
+	do {
+		krb5_error_code ret;
+		hdb_entry ent;
+		struct berval *keys;
+		size_t nkeys;
+		int kvno, i;
+		Attribute *a;
+
+		if ( !SMBK5PWD_DO_KRB5( pi ) ) break;
+
+		if ( !is_entry_objectclass(e, oc_krb5KDCEntry, 0 ) ) break;
+
+		a = attr_find( e->e_attrs, ad_krb5PrincipalName );
+		if ( !a ) break;
+
+		memset( &ent, 0, sizeof(ent) );
+		ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
+		if ( ret ) break;
+
+		a = attr_find( e->e_attrs, ad_krb5KeyVersionNumber );
+		kvno = 0;
+		if ( a ) {
+			if ( lutil_atoi( &kvno, a->a_vals[0].bv_val ) != 0 ) {
+				Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
+					"dn=\"%s\" unable to parse krb5KeyVersionNumber=\"%s\"\n",
+					op->o_log_prefix, e->e_name.bv_val, a->a_vals[0].bv_val );
+			}
+
+		} else {
+			/* shouldn't happen, this is a required attr */
+			Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
+				"dn=\"%s\" missing krb5KeyVersionNumber\n",
+				op->o_log_prefix, e->e_name.bv_val );
+		}
+
+		ret = hdb_generate_key_set_password(context, ent.principal,
+			qpw->rs_new.bv_val, &ent.keys.val, &nkeys);
+		ent.keys.len = nkeys;
+		hdb_seal_keys(context, db, &ent);
+		krb5_free_principal( context, ent.principal );
+
+		keys = ch_malloc( (ent.keys.len + 1) * sizeof(struct berval));
+
+		for (i = 0; i < ent.keys.len; i++) {
+			unsigned char *buf;
+			size_t len;
+
+			ASN1_MALLOC_ENCODE(Key, buf, len, &ent.keys.val[i], &len, ret);
+			if (ret != 0)
+				break;
+			
+			keys[i].bv_val = (char *)buf;
+			keys[i].bv_len = len;
+		}
+		BER_BVZERO( &keys[i] );
+
+		hdb_free_keys(context, ent.keys.len, ent.keys.val);
+
+		if ( i != ent.keys.len ) {
+			ber_bvarray_free( keys );
+			break;
+		}
+
+		ml = ch_malloc(sizeof(Modifications));
+		if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
+		ml->sml_next = qpw->rs_mods;
+		qpw->rs_mods = ml;
+
+		ml->sml_desc = ad_krb5Key;
+		ml->sml_op = LDAP_MOD_REPLACE;
+#ifdef SLAP_MOD_INTERNAL
+		ml->sml_flags = SLAP_MOD_INTERNAL;
+#endif
+		ml->sml_numvals = i;
+		ml->sml_values = keys;
+		ml->sml_nvalues = NULL;
+		
+		ml = ch_malloc(sizeof(Modifications));
+		ml->sml_next = qpw->rs_mods;
+		qpw->rs_mods = ml;
+		
+		ml->sml_desc = ad_krb5KeyVersionNumber;
+		ml->sml_op = LDAP_MOD_REPLACE;
+#ifdef SLAP_MOD_INTERNAL
+		ml->sml_flags = SLAP_MOD_INTERNAL;
+#endif
+		ml->sml_numvals = 1;
+		ml->sml_values = ch_malloc( 2 * sizeof(struct berval));
+		ml->sml_values[0].bv_val = ch_malloc( 64 );
+		ml->sml_values[0].bv_len = sprintf(ml->sml_values[0].bv_val,
+			"%d", kvno+1 );
+		BER_BVZERO( &ml->sml_values[1] );
+		ml->sml_nvalues = NULL;
+	} while ( 0 );
+#endif /* DO_KRB5 */
+
+#ifdef DO_SAMBA
+	/* Samba stuff */
+	if ( SMBK5PWD_DO_SAMBA( pi ) && is_entry_objectclass(e, oc_sambaSamAccount, 0 ) ) {
+		struct berval *keys;
+		ber_len_t j,l;
+		wchar_t *wcs, wc;
+		char *c;
+		struct berval pwd;
+		
+		/* Expand incoming UTF8 string to UCS4 */
+		l = ldap_utf8_chars(qpw->rs_new.bv_val);
+		wcs = ch_malloc((l+1) * sizeof(wchar_t));
+
+		ldap_x_utf8s_to_wcs( wcs, qpw->rs_new.bv_val, l );
+		
+		/* Truncate UCS4 to UCS2 */
+		c = (char *)wcs;
+		for (j=0; j<l; j++) {
+			wc = wcs[j];
+			*c++ = wc & 0xff;
+			*c++ = (wc >> 8) & 0xff;
+		}
+		*c++ = 0;
+		pwd.bv_val = (char *)wcs;
+		pwd.bv_len = l * 2;
+
+		ml = ch_malloc(sizeof(Modifications));
+		if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
+		ml->sml_next = qpw->rs_mods;
+		qpw->rs_mods = ml;
+
+		keys = ch_malloc( 2 * sizeof(struct berval) );
+		BER_BVZERO( &keys[1] );
+		nthash( &pwd, keys );
+		
+		ml->sml_desc = ad_sambaNTPassword;
+		ml->sml_op = LDAP_MOD_REPLACE;
+#ifdef SLAP_MOD_INTERNAL
+		ml->sml_flags = SLAP_MOD_INTERNAL;
+#endif
+		ml->sml_numvals = 1;
+		ml->sml_values = keys;
+		ml->sml_nvalues = NULL;
+
+		ch_free(wcs);
+
+		ml = ch_malloc(sizeof(Modifications));
+		ml->sml_next = qpw->rs_mods;
+		qpw->rs_mods = ml;
+
+		keys = ch_malloc( 2 * sizeof(struct berval) );
+		keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
+		keys[0].bv_len = snprintf(keys[0].bv_val,
+			LDAP_PVT_INTTYPE_CHARS(long),
+			"%ld", slap_get_time());
+		BER_BVZERO( &keys[1] );
+		
+		ml->sml_desc = ad_sambaPwdLastSet;
+		ml->sml_op = LDAP_MOD_REPLACE;
+#ifdef SLAP_MOD_INTERNAL
+		ml->sml_flags = SLAP_MOD_INTERNAL;
+#endif
+		ml->sml_numvals = 1;
+		ml->sml_values = keys;
+		ml->sml_nvalues = NULL;
+
+		if (pi->smb_must_change)
+		{
+			ml = ch_malloc(sizeof(Modifications));
+			ml->sml_next = qpw->rs_mods;
+			qpw->rs_mods = ml;
+
+			keys = ch_malloc( 2 * sizeof(struct berval) );
+			keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
+			keys[0].bv_len = snprintf(keys[0].bv_val,
+					LDAP_PVT_INTTYPE_CHARS(long),
+					"%ld", slap_get_time() + pi->smb_must_change);
+			BER_BVZERO( &keys[1] );
+
+			ml->sml_desc = ad_sambaPwdMustChange;
+			ml->sml_op = LDAP_MOD_REPLACE;
+#ifdef SLAP_MOD_INTERNAL
+			ml->sml_flags = SLAP_MOD_INTERNAL;
+#endif
+			ml->sml_numvals = 1;
+			ml->sml_values = keys;
+			ml->sml_nvalues = NULL;
+		}
+
+		if (pi->smb_can_change)
+		{
+			ml = ch_malloc(sizeof(Modifications));
+			ml->sml_next = qpw->rs_mods;
+			qpw->rs_mods = ml;
+
+			keys = ch_malloc( 2 * sizeof(struct berval) );
+			keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
+			keys[0].bv_len = snprintf(keys[0].bv_val,
+					LDAP_PVT_INTTYPE_CHARS(long),
+					"%ld", slap_get_time() + pi->smb_can_change);
+			BER_BVZERO( &keys[1] );
+
+			ml->sml_desc = ad_sambaPwdCanChange;
+			ml->sml_op = LDAP_MOD_REPLACE;
+#ifdef SLAP_MOD_INTERNAL
+			ml->sml_flags = SLAP_MOD_INTERNAL;
+#endif
+			ml->sml_numvals = 1;
+			ml->sml_values = keys;
+			ml->sml_nvalues = NULL;
+		}
+	}
+#endif /* DO_SAMBA */
+
+#ifdef DO_SHADOW
+	/* shadow stuff */
+	if ( SMBK5PWD_DO_SHADOW( pi ) && is_entry_objectclass(e, oc_shadowAccount, 0 ) ) {
+		struct berval *keys;
+
+		ml = ch_malloc(sizeof(Modifications));
+		if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
+		ml->sml_next = qpw->rs_mods;
+		qpw->rs_mods = ml;
+
+		keys = ch_malloc( sizeof(struct berval) * 2);
+		BER_BVZERO( &keys[1] );
+		keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
+		keys[0].bv_len = snprintf(keys[0].bv_val,
+			LDAP_PVT_INTTYPE_CHARS(long),
+			"%ld", (long)(slap_get_time() / (60 * 60 * 24)));
+
+		ml->sml_desc = ad_shadowLastChange;
+		ml->sml_op = LDAP_MOD_REPLACE;
+#ifdef SLAP_MOD_INTERNAL
+		ml->sml_flags = SLAP_MOD_INTERNAL;
+#endif
+		ml->sml_numvals = 1;
+		ml->sml_values = keys;
+		ml->sml_nvalues = NULL;
+	}
+#endif /* DO_SHADOW */
+
+	be_entry_release_r( op, e );
+	qpw->rs_new.bv_val[qpw->rs_new.bv_len] = term;
+
+	return SLAP_CB_CONTINUE;
+}
+
+static slap_overinst smbk5pwd;
+
+/* back-config stuff */
+enum {
+	PC_SMB_MUST_CHANGE = 1,
+	PC_SMB_CAN_CHANGE,
+	PC_SMB_ENABLE
+};
+
+static ConfigDriver smbk5pwd_cf_func;
+
+/*
+ * NOTE: uses OID arcs OLcfgCtAt:1 and OLcfgCtOc:1
+ */
+
+static ConfigTable smbk5pwd_cfats[] = {
+	{ "smbk5pwd-enable", "arg",
+		2, 0, 0, ARG_MAGIC|PC_SMB_ENABLE, smbk5pwd_cf_func,
+		"( OLcfgCtAt:1.1 NAME 'olcSmbK5PwdEnable' "
+		"DESC 'Modules to be enabled' "
+		"EQUALITY caseIgnoreMatch "
+		"SYNTAX OMsDirectoryString )", NULL, NULL },
+	{ "smbk5pwd-must-change", "time",
+		2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_MUST_CHANGE, smbk5pwd_cf_func,
+		"( OLcfgCtAt:1.2 NAME 'olcSmbK5PwdMustChange' "
+		"DESC 'Credentials validity interval' "
+		"EQUALITY integerMatch "
+		"SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
+	{ "smbk5pwd-can-change", "time",
+		2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_CAN_CHANGE, smbk5pwd_cf_func,
+		"( OLcfgCtAt:1.3 NAME 'olcSmbK5PwdCanChange' "
+		"DESC 'Credentials minimum validity interval' "
+		"EQUALITY integerMatch "
+		"SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
+
+	{ NULL, NULL, 0, 0, 0, ARG_IGNORED }
+};
+
+static ConfigOCs smbk5pwd_cfocs[] = {
+	{ "( OLcfgCtOc:1.1 "
+		"NAME 'olcSmbK5PwdConfig' "
+		"DESC 'smbk5pwd overlay configuration' "
+		"SUP olcOverlayConfig "
+		"MAY ( "
+			"olcSmbK5PwdEnable "
+			"$ olcSmbK5PwdMustChange "
+			"$ olcSmbK5PwdCanChange "
+		") )", Cft_Overlay, smbk5pwd_cfats },
+
+	{ NULL, 0, NULL }
+};
+
+/*
+ * add here other functionalities; handle their initialization
+ * as appropriate in smbk5pwd_modules_init().
+ */
+static slap_verbmasks smbk5pwd_modules[] = {
+	{ BER_BVC( "krb5" ),		SMBK5PWD_F_KRB5	},
+	{ BER_BVC( "samba" ),		SMBK5PWD_F_SAMBA },
+	{ BER_BVC( "shadow" ),		SMBK5PWD_F_SHADOW },
+	{ BER_BVNULL,			-1 }
+};
+
+static int
+smbk5pwd_cf_func( ConfigArgs *c )
+{
+	slap_overinst	*on = (slap_overinst *)c->bi;
+
+	int		rc = 0;
+	smbk5pwd_t	*pi = on->on_bi.bi_private;
+
+	if ( c->op == SLAP_CONFIG_EMIT ) {
+		switch( c->type ) {
+		case PC_SMB_MUST_CHANGE:
+#ifdef DO_SAMBA
+			c->value_int = pi->smb_must_change;
+#else /* ! DO_SAMBA */
+			c->value_int = 0;
+#endif /* ! DO_SAMBA */
+			break;
+
+		case PC_SMB_CAN_CHANGE:
+#ifdef DO_SAMBA
+			c->value_int = pi->smb_can_change;
+#else /* ! DO_SAMBA */
+			c->value_int = 0;
+#endif /* ! DO_SAMBA */
+			break;
+
+		case PC_SMB_ENABLE:
+			c->rvalue_vals = NULL;
+			if ( pi->mode ) {
+				mask_to_verbs( smbk5pwd_modules, pi->mode, &c->rvalue_vals );
+				if ( c->rvalue_vals == NULL ) {
+					rc = 1;
+				}
+			}
+			break;
+
+		default:
+			assert( 0 );
+			rc = 1;
+		}
+		return rc;
+
+	} else if ( c->op == LDAP_MOD_DELETE ) {
+		switch( c->type ) {
+		case PC_SMB_MUST_CHANGE:
+			break;
+
+                case PC_SMB_CAN_CHANGE:
+                        break;
+
+		case PC_SMB_ENABLE:
+			if ( !c->line ) {
+				pi->mode = 0;
+
+			} else {
+				int i;
+
+				i = verb_to_mask( c->line, smbk5pwd_modules );
+				pi->mode &= ~smbk5pwd_modules[i].mask;
+			}
+			break;
+
+		default:
+			assert( 0 );
+			rc = 1;
+		}
+		return rc;
+	}
+
+	switch( c->type ) {
+	case PC_SMB_MUST_CHANGE:
+#ifdef DO_SAMBA
+		if ( c->value_int < 0 ) {
+			Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
+				"<%s> invalid negative value \"%d\".",
+				c->log, c->argv[ 0 ], c->value_int );
+			return 1;
+		}
+		pi->smb_must_change = c->value_int;
+#else /* ! DO_SAMBA */
+		Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
+			"<%s> only meaningful "
+			"when compiled with -DDO_SAMBA.\n",
+			c->log, c->argv[ 0 ] );
+		return 1;
+#endif /* ! DO_SAMBA */
+		break;
+
+        case PC_SMB_CAN_CHANGE:
+#ifdef DO_SAMBA
+                if ( c->value_int < 0 ) {
+                        Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
+                                "<%s> invalid negative value \"%d\".",
+                                c->log, c->argv[ 0 ], c->value_int );
+                        return 1;
+                }
+                pi->smb_can_change = c->value_int;
+#else /* ! DO_SAMBA */
+                Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
+                        "<%s> only meaningful "
+                        "when compiled with -DDO_SAMBA.\n",
+                        c->log, c->argv[ 0 ] );
+                return 1;
+#endif /* ! DO_SAMBA */
+                break;
+
+	case PC_SMB_ENABLE: {
+		slap_mask_t	mode = pi->mode, m = 0;
+
+		rc = verbs_to_mask( c->argc, c->argv, smbk5pwd_modules, &m );
+		if ( rc > 0 ) {
+			Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
+				"<%s> unknown module \"%s\".\n",
+				c->log, c->argv[ 0 ], c->argv[ rc ] );
+			return 1;
+		}
+
+		/* we can hijack the smbk5pwd_t structure because
+		 * from within the configuration, this is the only
+		 * active thread. */
+		pi->mode |= m;
+
+#ifndef DO_KRB5
+		if ( SMBK5PWD_DO_KRB5( pi ) ) {
+			Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
+				"<%s> module \"%s\" only allowed when compiled with -DDO_KRB5.\n",
+				c->log, c->argv[ 0 ], c->argv[ rc ] );
+			pi->mode = mode;
+			return 1;
+		}
+#endif /* ! DO_KRB5 */
+
+#ifndef DO_SAMBA
+		if ( SMBK5PWD_DO_SAMBA( pi ) ) {
+			Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
+				"<%s> module \"%s\" only allowed when compiled with -DDO_SAMBA.\n",
+				c->log, c->argv[ 0 ], c->argv[ rc ] );
+			pi->mode = mode;
+			return 1;
+		}
+#endif /* ! DO_SAMBA */
+
+#ifndef DO_SHADOW
+		if ( SMBK5PWD_DO_SHADOW( pi ) ) {
+			Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
+				"<%s> module \"%s\" only allowed when compiled with -DDO_SHADOW.\n",
+				c->log, c->argv[ 0 ], c->argv[ rc ] );
+			pi->mode = mode;
+			return 1;
+		}
+#endif /* ! DO_SHADOW */
+
+		/* Re-initialize the module, because
+		 * the configuration might have changed */
+		rc = smbk5pwd_modules_init( pi );
+		if ( rc ) {
+			pi->mode = mode;
+			return 1;
+		}
+
+		} break;
+
+	default:
+		assert( 0 );
+		return 1;
+	}
+	return rc;
+}
+
+static int
+smbk5pwd_modules_init( smbk5pwd_t *pi )
+{
+	static struct {
+		const char		*name;
+		AttributeDescription	**adp;
+	}
+#ifdef DO_KRB5
+	krb5_ad[] = {
+		{ "krb5Key",			&ad_krb5Key },
+		{ "krb5KeyVersionNumber",	&ad_krb5KeyVersionNumber },
+		{ "krb5PrincipalName",		&ad_krb5PrincipalName },
+		{ "krb5ValidEnd",		&ad_krb5ValidEnd },
+		{ NULL }
+	},
+#endif /* DO_KRB5 */
+#ifdef DO_SAMBA
+	samba_ad[] = {
+		{ "sambaNTPassword",		&ad_sambaNTPassword },
+		{ "sambaPwdLastSet",		&ad_sambaPwdLastSet },
+		{ "sambaPwdMustChange",		&ad_sambaPwdMustChange },
+		{ "sambaPwdCanChange",		&ad_sambaPwdCanChange },
+		{ NULL }
+	},
+#endif /* DO_SAMBA */
+#ifdef DO_SHADOW
+	shadow_ad[] = {
+		{ "shadowLastChange",		&ad_shadowLastChange },
+		{ NULL }
+	},
+#endif /* DO_SHADOW */
+	dummy_ad;
+
+	/* this is to silence the unused var warning */
+	(void) dummy_ad;
+
+#ifdef DO_KRB5
+	if ( SMBK5PWD_DO_KRB5( pi ) && oc_krb5KDCEntry == NULL ) {
+		krb5_error_code	ret;
+		extern HDB 	*_kadm5_s_get_db(void *);
+
+		int		i, rc;
+
+		/* Make sure all of our necessary schema items are loaded */
+		oc_krb5KDCEntry = oc_find( "krb5KDCEntry" );
+		if ( !oc_krb5KDCEntry ) {
+			Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
+				"unable to find \"krb5KDCEntry\" objectClass.\n" );
+			return -1;
+		}
+
+		for ( i = 0; krb5_ad[ i ].name != NULL; i++ ) {
+			const char	*text;
+
+			*(krb5_ad[ i ].adp) = NULL;
+
+			rc = slap_str2ad( krb5_ad[ i ].name, krb5_ad[ i ].adp, &text );
+			if ( rc != LDAP_SUCCESS ) {
+				Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
+					"unable to find \"%s\" attributeType: %s (%d).\n",
+					krb5_ad[ i ].name, text, rc );
+				oc_krb5KDCEntry = NULL;
+				return rc;
+			}
+		}
+
+		/* Initialize Kerberos context */
+		ret = krb5_init_context(&context);
+		if (ret) {
+			Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
+				"unable to initialize krb5 context (%d).\n",
+				ret );
+			oc_krb5KDCEntry = NULL;
+			return -1;
+		}
+
+		ret = kadm5_s_init_with_password_ctx( context,
+			KADM5_ADMIN_SERVICE,
+			NULL,
+			KADM5_ADMIN_SERVICE,
+			&conf, 0, 0, &kadm_context );
+		if (ret) {
+			char *err_str, *err_msg = "<unknown error>";
+			err_str = krb5_get_error_string( context );
+			if (!err_str)
+				err_msg = (char *)krb5_get_err_text( context, ret );
+			Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
+				"unable to initialize krb5 admin context: %s (%d).\n",
+				err_str ? err_str : err_msg, ret );
+			if (err_str)
+				krb5_free_error_string( context, err_str );
+			krb5_free_context( context );
+			oc_krb5KDCEntry = NULL;
+			return -1;
+		}
+
+		db = _kadm5_s_get_db( kadm_context );
+	}
+#endif /* DO_KRB5 */
+
+#ifdef DO_SAMBA
+	if ( SMBK5PWD_DO_SAMBA( pi ) && oc_sambaSamAccount == NULL ) {
+		int		i, rc;
+
+		oc_sambaSamAccount = oc_find( "sambaSamAccount" );
+		if ( !oc_sambaSamAccount ) {
+			Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
+				"unable to find \"sambaSamAccount\" objectClass.\n" );
+			return -1;
+		}
+
+		for ( i = 0; samba_ad[ i ].name != NULL; i++ ) {
+			const char	*text;
+
+			*(samba_ad[ i ].adp) = NULL;
+
+			rc = slap_str2ad( samba_ad[ i ].name, samba_ad[ i ].adp, &text );
+			if ( rc != LDAP_SUCCESS ) {
+				Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
+					"unable to find \"%s\" attributeType: %s (%d).\n",
+					samba_ad[ i ].name, text, rc );
+				oc_sambaSamAccount = NULL;
+				return rc;
+			}
+		}
+	}
+#endif /* DO_SAMBA */
+
+#ifdef DO_SHADOW
+	if ( SMBK5PWD_DO_SHADOW( pi ) && oc_shadowAccount == NULL ) {
+		int		i, rc;
+
+		oc_shadowAccount = oc_find( "shadowAccount" );
+		if ( !oc_shadowAccount ) {
+			Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
+				"unable to find \"shadowAccount\" objectClass.\n" );
+			return -1;
+		}
+
+		for ( i = 0; shadow_ad[ i ].name != NULL; i++ ) {
+			const char	*text;
+
+			*(shadow_ad[ i ].adp) = NULL;
+
+			rc = slap_str2ad( shadow_ad[ i ].name, shadow_ad[ i ].adp, &text );
+			if ( rc != LDAP_SUCCESS ) {
+				Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
+					"unable to find \"%s\" attributeType: %s (%d).\n",
+					shadow_ad[ i ].name, text, rc );
+				oc_shadowAccount = NULL;
+				return rc;
+			}
+		}
+	}
+#endif /* DO_SHADOW */
+
+	return 0;
+}
+
+static int
+smbk5pwd_db_init(BackendDB *be, ConfigReply *cr)
+{
+	slap_overinst	*on = (slap_overinst *)be->bd_info;
+	smbk5pwd_t	*pi;
+
+	pi = ch_calloc( 1, sizeof( smbk5pwd_t ) );
+	if ( pi == NULL ) {
+		return 1;
+	}
+	on->on_bi.bi_private = (void *)pi;
+
+	return 0;
+}
+
+static int
+smbk5pwd_db_open(BackendDB *be, ConfigReply *cr)
+{
+	slap_overinst	*on = (slap_overinst *)be->bd_info;
+	smbk5pwd_t	*pi = (smbk5pwd_t *)on->on_bi.bi_private;
+
+	int	rc;
+
+	if ( pi->mode == 0 ) {
+		pi->mode = SMBK5PWD_F_ALL;
+	}
+
+	rc = smbk5pwd_modules_init( pi );
+	if ( rc ) {
+		return rc;
+	}
+
+	return 0;
+}
+
+static int
+smbk5pwd_db_destroy(BackendDB *be, ConfigReply *cr)
+{
+	slap_overinst	*on = (slap_overinst *)be->bd_info;
+	smbk5pwd_t	*pi = (smbk5pwd_t *)on->on_bi.bi_private;
+
+	if ( pi ) {
+		ch_free( pi );
+	}
+
+	return 0;
+}
+
+int
+smbk5pwd_initialize(void)
+{
+	int		rc;
+
+	smbk5pwd.on_bi.bi_type = "smbk5pwd";
+
+	smbk5pwd.on_bi.bi_flags = SLAPO_BFLAG_SINGLE;
+	smbk5pwd.on_bi.bi_db_init = smbk5pwd_db_init;
+	smbk5pwd.on_bi.bi_db_open = smbk5pwd_db_open;
+	smbk5pwd.on_bi.bi_db_destroy = smbk5pwd_db_destroy;
+
+	smbk5pwd.on_bi.bi_extended = smbk5pwd_exop_passwd;
+    
+#ifdef DO_KRB5
+	smbk5pwd.on_bi.bi_op_bind = smbk5pwd_op_bind;
+
+	lutil_passwd_add( (struct berval *)&k5key_scheme, k5key_chk, k5key_hash );
+#endif
+
+	smbk5pwd.on_bi.bi_cf_ocs = smbk5pwd_cfocs;
+
+	rc = config_register_schema( smbk5pwd_cfats, smbk5pwd_cfocs );
+	if ( rc ) {
+		return rc;
+	}
+
+	return overlay_register( &smbk5pwd );
+}
+
+#if SLAPD_OVER_SMBK5PWD == SLAPD_MOD_DYNAMIC
+int init_module(int argc, char *argv[]) {
+	return smbk5pwd_initialize();
+}
+#endif
+
+#endif /* defined(SLAPD_OVER_SMBK5PWD) */