Adding upstream version 2.4.47+dfsg.upstream/2.4.47+dfsgupstream

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

1 files changed, 1177 insertions, 0 deletions

diff --git a/contrib/slapd-modules/smbk5pwd/smbk5pwd.c b/contrib/slapd-modules/smbk5pwd/smbk5pwd.c
new file mode 100644
index 0000000..0dda119
--- /dev/null
+++ b/contrib/slapd-modules/smbk5pwd/smbk5pwd.c
@@ -0,0 +1,1177 @@
+/* smbk5pwd.c - Overlay for managing Samba and Heimdal passwords */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2004-2018 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 "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/des.h>
+#include <nettle/md4.h>
+typedef unsigned char DES_cblock[8];
+#elif HAVE_OPENSSL
+#include <openssl/des.h>
+#include <openssl/md4.h>
+#else
+#error Unsupported crypto backend.
+#endif
+#include "ldap_utf8.h"
+
+static AttributeDescription *ad_sambaLMPassword;
+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";
+
+/* From liblutil/passwd.c... */
+static void lmPasswd_to_key(
+	const char *lmPasswd,
+	DES_cblock *key)
+{
+	const unsigned char *lpw = (const unsigned char *)lmPasswd;
+	unsigned char *k = (unsigned char *)key;
+
+	/* make room for parity bits */
+	k[0] = lpw[0];
+	k[1] = ((lpw[0]&0x01)<<7) | (lpw[1]>>1);
+	k[2] = ((lpw[1]&0x03)<<6) | (lpw[2]>>2);
+	k[3] = ((lpw[2]&0x07)<<5) | (lpw[3]>>3);
+	k[4] = ((lpw[3]&0x0F)<<4) | (lpw[4]>>4);
+	k[5] = ((lpw[4]&0x1F)<<3) | (lpw[5]>>5);
+	k[6] = ((lpw[5]&0x3F)<<2) | (lpw[6]>>6);
+	k[7] = ((lpw[6]&0x7F)<<1);
+
+#ifdef HAVE_OPENSSL
+	DES_set_odd_parity( key );
+#endif
+}
+
+#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 lmhash(
+	struct berval *passwd,
+	struct berval *hash
+)
+{
+	char UcasePassword[15];
+	DES_cblock key;
+	DES_cblock StdText = "KGS!@#$%";
+	DES_cblock hbuf[2];
+#ifdef HAVE_OPENSSL
+	DES_key_schedule schedule;
+#elif defined(HAVE_GNUTLS)
+	struct des_ctx ctx;
+#endif
+
+	strncpy( UcasePassword, passwd->bv_val, 14 );
+	UcasePassword[14] = '\0';
+	ldap_pvt_str2upper( UcasePassword );
+
+	lmPasswd_to_key( UcasePassword, &key );
+#ifdef HAVE_GNUTLS
+	des_set_key( &ctx, key );
+	des_encrypt( &ctx, sizeof(key), hbuf[0], StdText );
+
+	lmPasswd_to_key( &UcasePassword[7], &key );
+	des_set_key( &ctx, key );
+	des_encrypt( &ctx, sizeof(key), hbuf[1], StdText );
+#elif defined(HAVE_OPENSSL)
+	DES_set_key_unchecked( &key, &schedule );
+	DES_ecb_encrypt( &StdText, &hbuf[0], &schedule , DES_ENCRYPT );
+
+	lmPasswd_to_key( &UcasePassword[7], &key );
+	DES_set_key_unchecked( &key, &schedule );
+	DES_ecb_encrypt( &StdText, &hbuf[1], &schedule , DES_ENCRYPT );
+#endif
+
+	hexify( (char *)hbuf, hash );
+}
+
+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_usec < 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, 0 );
+		}
+
+		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, *d;
+		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;
+
+		/* Truncate UCS2 to 8-bit ASCII */
+		c = pwd.bv_val+1;
+		d = pwd.bv_val+2;
+		for (j=1; j<l; j++) {
+			*c++ = *d++;
+			d++;
+		}
+		pwd.bv_len /= 2;
+		pwd.bv_val[pwd.bv_len] = '\0';
+
+		ml = ch_malloc(sizeof(Modifications));
+		ml->sml_next = qpw->rs_mods;
+		qpw->rs_mods = ml;
+
+		keys = ch_malloc( 2 * sizeof(struct berval) );
+		BER_BVZERO( &keys[1] );
+		lmhash( &pwd, keys );
+		
+		ml->sml_desc = ad_sambaLMPassword;
+		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' "
+		"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' "
+		"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' "
+		"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 ], 0 );
+			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 ], 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 ], 0 );
+                        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 ], 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[] = {
+		{ "sambaLMPassword",		&ad_sambaLMPassword },
+		{ "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",
+				0, 0, 0 );
+			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, 0, 0 );
+			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, 0 );
+			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",
+				0, 0, 0 );
+			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",
+				0, 0, 0 );
+			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_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) */