This commit was generated by cvs2svn to compensate for changes in r30,

which included commits to RCS files with non-trunk default branches.
(This used to be commit 3a69cffb062d4f1238b8cae10481c1f2ea4d3d8b)

1 files changed, 2098 insertions, 0 deletions

diff --git a/source4/libads/ldap.c b/source4/libads/ldap.c
new file mode 100644
index 0000000000..0bcd76cb9f
--- /dev/null
+++ b/source4/libads/ldap.c
@@ -0,0 +1,2098 @@
+/* 
+   Unix SMB/CIFS implementation.
+   ads (active directory) utility library
+   Copyright (C) Andrew Tridgell 2001
+   Copyright (C) Remus Koos 2001
+   Copyright (C) Jim McDonough 2002
+   
+   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; either version 2 of the License, or
+   (at your option) any later version.
+   
+   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., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+#ifdef HAVE_LDAP
+
+/**
+ * @file ldap.c
+ * @brief basic ldap client-side routines for ads server communications
+ *
+ * The routines contained here should do the necessary ldap calls for
+ * ads setups.
+ * 
+ * Important note: attribute names passed into ads_ routines must
+ * already be in UTF-8 format.  We do not convert them because in almost
+ * all cases, they are just ascii (which is represented with the same
+ * codepoints in UTF-8).  This may have to change at some point
+ **/
+
+
+/*
+  try a connection to a given ldap server, returning True and setting the servers IP
+  in the ads struct if successful
+ */
+static BOOL ads_try_connect(ADS_STRUCT *ads, const char *server, unsigned port)
+{
+	char *srv;
+
+	if (!server || !*server) {
+		return False;
+	}
+
+	DEBUG(5,("ads_try_connect: trying ldap server '%s' port %u\n", server, port));
+
+	/* this copes with inet_ntoa brokenness */
+	srv = strdup(server);
+
+	ads->ld = ldap_open(srv, port);
+	if (!ads->ld) {
+		free(srv);
+		return False;
+	}
+	ads->ldap_port = port;
+	ads->ldap_ip = *interpret_addr2(srv);
+	free(srv);
+
+	return True;
+}
+
+/*
+  try a connection to a given ldap server, based on URL, returning True if successful
+ */
+static BOOL ads_try_connect_uri(ADS_STRUCT *ads)
+{
+#if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
+	DEBUG(5,("ads_try_connect: trying ldap server at URI '%s'\n", 
+		 ads->server.ldap_uri));
+
+	
+	if (ldap_initialize((LDAP**)&(ads->ld), ads->server.ldap_uri) == LDAP_SUCCESS) {
+		return True;
+	}
+	DEBUG(0, ("ldap_initialize: %s\n", strerror(errno)));
+	
+#else 
+
+	DEBUG(1, ("no URL support in LDAP libs!\n"));
+#endif
+
+	return False;
+}
+
+/* used by the IP comparison function */
+struct ldap_ip {
+	struct in_addr ip;
+	unsigned port;
+};
+
+/* compare 2 ldap IPs by nearness to our interfaces - used in qsort */
+static int ldap_ip_compare(struct ldap_ip *ip1, struct ldap_ip *ip2)
+{
+	return ip_compare(&ip1->ip, &ip2->ip);
+}
+
+/* try connecting to a ldap server via DNS */
+static BOOL ads_try_dns(ADS_STRUCT *ads)
+{
+	const char *c_realm;
+	const char *ptr;
+	char *realm;
+	char *list = NULL;
+	pstring tok;
+	struct ldap_ip *ip_list;
+	int count, i=0;
+
+	c_realm = ads->server.realm;
+	if (!c_realm || !*c_realm) {
+		c_realm = lp_realm();
+	}
+	if (!c_realm || !*c_realm) {
+		c_realm = ads->server.workgroup;
+	}
+	if (!c_realm || !*c_realm) {
+		c_realm = lp_workgroup();
+	}
+	if (!c_realm) {
+		return False;
+	}
+	realm = smb_xstrdup(c_realm);
+
+	DEBUG(6,("ads_try_dns: looking for realm '%s'\n", realm));
+	if (ldap_domain2hostlist(realm, &list) != LDAP_SUCCESS) {
+		SAFE_FREE(realm);
+		return False;
+	}
+
+	DEBUG(6,("ads_try_dns: ldap realm '%s' host list '%s'\n", realm, list));
+	SAFE_FREE(realm);
+
+	count = count_chars(list, ' ') + 1;
+	ip_list = malloc(count * sizeof(struct ldap_ip));
+	if (!ip_list) {
+		return False;
+	}
+
+	ptr = list;
+	while (next_token(&ptr, tok, " ", sizeof(tok))) {
+		unsigned port = LDAP_PORT;
+		char *p = strchr(tok, ':');
+		if (p) {
+			*p = 0;
+			port = atoi(p+1);
+		}
+		ip_list[i].ip = *interpret_addr2(tok);
+		ip_list[i].port = port;
+		if (!is_zero_ip(ip_list[i].ip)) {
+			i++;
+		}
+	}
+	free(list);
+
+	count = i;
+
+	/* we sort the list of addresses by closeness to our interfaces. This
+	   tries to prevent us using a DC on the other side of the country */
+	if (count > 1) {
+		qsort(ip_list, count, sizeof(struct ldap_ip), 
+		      QSORT_CAST ldap_ip_compare);	
+	}
+
+	for (i=0;i<count;i++) {
+		if (ads_try_connect(ads, inet_ntoa(ip_list[i].ip), ip_list[i].port)) {
+			free(ip_list);
+			return True;
+		}
+	}
+
+	SAFE_FREE(ip_list);
+	return False;
+}
+
+/* try connecting to a ldap server via netbios */
+static BOOL ads_try_netbios(ADS_STRUCT *ads)
+{
+	struct in_addr *ip_list, pdc_ip;
+	int count;
+	int i;
+	const char *workgroup = ads->server.workgroup;
+	BOOL list_ordered;
+
+	if (!workgroup) {
+		workgroup = lp_workgroup();
+	}
+
+	DEBUG(6,("ads_try_netbios: looking for workgroup '%s'\n", workgroup));
+
+	/* try the PDC first */
+	if (get_pdc_ip(workgroup, &pdc_ip)) { 
+		DEBUG(6,("ads_try_netbios: trying server '%s'\n", 
+			 inet_ntoa(pdc_ip)));
+		if (ads_try_connect(ads, inet_ntoa(pdc_ip), LDAP_PORT))
+			return True;
+	}
+
+	/* now any DC, including backups */
+	if (get_dc_list(workgroup, &ip_list, &count, &list_ordered)) { 
+		for (i=0;i<count;i++) {
+			DEBUG(6,("ads_try_netbios: trying server '%s'\n", 
+				 inet_ntoa(ip_list[i])));
+			if (ads_try_connect(ads, inet_ntoa(ip_list[i]), LDAP_PORT)) {
+				free(ip_list);
+				return True;
+			}
+		}
+		free(ip_list);
+	}
+
+	return False;
+}
+
+/**
+ * Connect to the LDAP server
+ * @param ads Pointer to an existing ADS_STRUCT
+ * @return status of connection
+ **/
+ADS_STATUS ads_connect(ADS_STRUCT *ads)
+{
+	int version = LDAP_VERSION3;
+	ADS_STATUS status;
+
+	ads->last_attempt = time(NULL);
+	ads->ld = NULL;
+
+	/* try with a URL based server */
+
+	if (ads->server.ldap_uri &&
+	    ads_try_connect_uri(ads)) {
+		goto got_connection;
+	}
+
+	/* try with a user specified server */
+	if (ads->server.ldap_server && 
+	    ads_try_connect(ads, ads->server.ldap_server, LDAP_PORT)) {
+		goto got_connection;
+	}
+
+	/* try with a smb.conf ads server setting if we are connecting
+           to the primary workgroup or realm */
+	if (!ads->server.foreign &&
+	    ads_try_connect(ads, lp_ads_server(), LDAP_PORT)) {
+		goto got_connection;
+	}
+
+	/* try via DNS */
+	if (ads_try_dns(ads)) {
+		goto got_connection;
+	}
+
+	/* try via netbios lookups */
+	if (!lp_disable_netbios() && ads_try_netbios(ads)) {
+		goto got_connection;
+	}
+
+	return ADS_ERROR_SYSTEM(errno?errno:ENOENT);
+
+got_connection:
+	DEBUG(3,("Connected to LDAP server %s\n", inet_ntoa(ads->ldap_ip)));
+
+	status = ads_server_info(ads);
+	if (!ADS_ERR_OK(status)) {
+		DEBUG(1,("Failed to get ldap server info\n"));
+		return status;
+	}
+
+	ldap_set_option(ads->ld, LDAP_OPT_PROTOCOL_VERSION, &version);
+
+	if (!ads->auth.user_name) {
+		/* by default use the machine account */
+		fstring myname;
+		fstrcpy(myname, lp_netbios_name());
+		strlower(myname);
+		asprintf(&ads->auth.user_name, "HOST/%s", myname);
+	}
+
+	if (!ads->auth.realm) {
+		ads->auth.realm = strdup(ads->config.realm);
+	}
+
+	if (!ads->auth.kdc_server) {
+		ads->auth.kdc_server = strdup(inet_ntoa(ads->ldap_ip));
+	}
+
+#if KRB5_DNS_HACK
+	/* this is a really nasty hack to avoid ADS DNS problems. It needs a patch
+	   to MIT kerberos to work (tridge) */
+	{
+		char *env;
+		asprintf(&env, "KRB5_KDC_ADDRESS_%s", ads->config.realm);
+		setenv(env, ads->auth.kdc_server, 1);
+		free(env);
+	}
+#endif
+
+	if (ads->auth.flags & ADS_AUTH_NO_BIND) {
+		return ADS_SUCCESS;
+	}
+
+	if (ads->auth.flags & ADS_AUTH_ANON_BIND) {
+		return ADS_ERROR(ldap_simple_bind_s( ads->ld, NULL, NULL));
+	}
+
+	if (ads->auth.flags & ADS_AUTH_SIMPLE_BIND) {
+		return ADS_ERROR(ldap_simple_bind_s( ads->ld, ads->auth.user_name, ads->auth.password));
+	}
+
+	return ads_sasl_bind(ads);
+}
+
+/*
+  Duplicate a struct berval into talloc'ed memory
+ */
+static struct berval *dup_berval(TALLOC_CTX *ctx, const struct berval *in_val)
+{
+	struct berval *value;
+
+	if (!in_val) return NULL;
+
+	value = talloc_zero(ctx, sizeof(struct berval));
+	if (value == NULL)
+		return NULL;
+	if (in_val->bv_len == 0) return value;
+
+	value->bv_len = in_val->bv_len;
+	value->bv_val = talloc_memdup(ctx, in_val->bv_val, in_val->bv_len);
+	return value;
+}
+
+/*
+  Make a values list out of an array of (struct berval *)
+ */
+static struct berval **ads_dup_values(TALLOC_CTX *ctx, 
+				      const struct berval **in_vals)
+{
+	struct berval **values;
+	int i;
+       
+	if (!in_vals) return NULL;
+	for (i=0; in_vals[i]; i++); /* count values */
+	values = (struct berval **) talloc_zero(ctx, 
+						(i+1)*sizeof(struct berval *));
+	if (!values) return NULL;
+
+	for (i=0; in_vals[i]; i++) {
+		values[i] = dup_berval(ctx, in_vals[i]);
+	}
+	return values;
+}
+
+/*
+  UTF8-encode a values list out of an array of (char *)
+ */
+static char **ads_push_strvals(TALLOC_CTX *ctx, const char **in_vals)
+{
+	char **values;
+	int i;
+       
+	if (!in_vals) return NULL;
+	for (i=0; in_vals[i]; i++); /* count values */
+	values = (char ** ) talloc_zero(ctx, (i+1)*sizeof(char *));
+	if (!values) return NULL;
+
+	for (i=0; in_vals[i]; i++) {
+		push_utf8_talloc(ctx, &values[i], in_vals[i]);
+	}
+	return values;
+}
+
+/*
+  Pull a (char *) array out of a UTF8-encoded values list
+ */
+static char **ads_pull_strvals(TALLOC_CTX *ctx, const char **in_vals)
+{
+	char **values;
+	int i;
+       
+	if (!in_vals) return NULL;
+	for (i=0; in_vals[i]; i++); /* count values */
+	values = (char **) talloc_zero(ctx, (i+1)*sizeof(char *));
+	if (!values) return NULL;
+
+	for (i=0; in_vals[i]; i++) {
+		pull_utf8_talloc(ctx, &values[i], in_vals[i]);
+	}
+	return values;
+}
+
+/**
+ * Do a search with paged results.  cookie must be null on the first
+ *  call, and then returned on each subsequent call.  It will be null
+ *  again when the entire search is complete 
+ * @param ads connection to ads server 
+ * @param bind_path Base dn for the search
+ * @param scope Scope of search (LDAP_BASE | LDAP_ONE | LDAP_SUBTREE)
+ * @param exp Search expression - specified in local charset
+ * @param attrs Attributes to retrieve - specified in utf8 or ascii
+ * @param res ** which will contain results - free res* with ads_msgfree()
+ * @param count Number of entries retrieved on this page
+ * @param cookie The paged results cookie to be returned on subsequent calls
+ * @return status of search
+ **/
+ADS_STATUS ads_do_paged_search(ADS_STRUCT *ads, const char *bind_path,
+			       int scope, const char *exp,
+			       const char **attrs, void **res, 
+			       int *count, void **cookie)
+{
+	int rc, i, version;
+	char *utf8_exp, *utf8_path, **search_attrs;
+	LDAPControl PagedResults, NoReferrals, *controls[3], **rcontrols; 
+	BerElement *cookie_be = NULL;
+	struct berval *cookie_bv= NULL;
+	TALLOC_CTX *ctx;
+
+	*res = NULL;
+
+	if (!(ctx = talloc_init("ads_do_paged_search")))
+		return ADS_ERROR(LDAP_NO_MEMORY);
+
+	/* 0 means the conversion worked but the result was empty 
+	   so we only fail if it's -1.  In any case, it always 
+	   at least nulls out the dest */
+	if ((push_utf8_talloc(ctx, &utf8_exp, exp) == (size_t)-1) ||
+	    (push_utf8_talloc(ctx, &utf8_path, bind_path) == (size_t)-1)) {
+		rc = LDAP_NO_MEMORY;
+		goto done;
+	}
+
+	if (!attrs || !(*attrs))
+		search_attrs = NULL;
+	else {
+		/* This would be the utf8-encoded version...*/
+		/* if (!(search_attrs = ads_push_strvals(ctx, attrs))) */
+		if (!(str_list_copy(&search_attrs, attrs))) {
+			rc = LDAP_NO_MEMORY;
+			goto done;
+		}
+	}
+		
+		
+	/* Paged results only available on ldap v3 or later */
+	ldap_get_option(ads->ld, LDAP_OPT_PROTOCOL_VERSION, &version);
+	if (version < LDAP_VERSION3) {
+		rc =  LDAP_NOT_SUPPORTED;
+		goto done;
+	}
+
+	cookie_be = ber_alloc_t(LBER_USE_DER);
+	if (cookie && *cookie) {
+		ber_printf(cookie_be, "{iO}", (ber_int_t) 1000, *cookie);
+		ber_bvfree(*cookie); /* don't need it from last time */
+		*cookie = NULL;
+	} else {
+		ber_printf(cookie_be, "{io}", (ber_int_t) 1000, "", 0);
+	}
+	ber_flatten(cookie_be, &cookie_bv);
+	PagedResults.ldctl_oid = ADS_PAGE_CTL_OID;
+	PagedResults.ldctl_iscritical = (char) 1;
+	PagedResults.ldctl_value.bv_len = cookie_bv->bv_len;
+	PagedResults.ldctl_value.bv_val = cookie_bv->bv_val;
+
+	NoReferrals.ldctl_oid = ADS_NO_REFERRALS_OID;
+	NoReferrals.ldctl_iscritical = (char) 0;
+	NoReferrals.ldctl_value.bv_len = 0;
+	NoReferrals.ldctl_value.bv_val = "";
+
+
+	controls[0] = &NoReferrals;
+	controls[1] = &PagedResults;
+	controls[2] = NULL;
+
+	*res = NULL;
+
+	/* we need to disable referrals as the openldap libs don't
+	   handle them and paged results at the same time.  Using them
+	   together results in the result record containing the server 
+	   page control being removed from the result list (tridge/jmcd) 
+	
+	   leaving this in despite the control that says don't generate
+	   referrals, in case the server doesn't support it (jmcd)
+	*/
+	ldap_set_option(ads->ld, LDAP_OPT_REFERRALS, LDAP_OPT_OFF);
+
+	rc = ldap_search_ext_s(ads->ld, utf8_path, scope, utf8_exp, 
+			       search_attrs, 0, controls,
+			       NULL, NULL, LDAP_NO_LIMIT, (LDAPMessage **)res);
+
+	ber_free(cookie_be, 1);
+	ber_bvfree(cookie_bv);
+
+	if (rc) {
+		DEBUG(3,("ldap_search_ext_s(%s) -> %s\n", exp, ldap_err2string(rc)));
+		goto done;
+	}
+
+	rc = ldap_parse_result(ads->ld, *res, NULL, NULL, NULL,
+					NULL, &rcontrols,  0);
+
+	if (!rcontrols) {
+		goto done;
+	}
+
+	for (i=0; rcontrols[i]; i++) {
+		if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) == 0) {
+			cookie_be = ber_init(&rcontrols[i]->ldctl_value);
+			ber_scanf(cookie_be,"{iO}", (ber_int_t *) count,
+				  &cookie_bv);
+			/* the berval is the cookie, but must be freed when
+			   it is all done */
+			if (cookie_bv->bv_len) /* still more to do */
+				*cookie=ber_bvdup(cookie_bv);
+			else
+				*cookie=NULL;
+			ber_bvfree(cookie_bv);
+			ber_free(cookie_be, 1);
+			break;
+		}
+	}
+	ldap_controls_free(rcontrols);
+
+done:
+	talloc_destroy(ctx);
+	/* if/when we decide to utf8-encode attrs, take out this next line */
+	str_list_free(&search_attrs);
+
+	return ADS_ERROR(rc);
+}
+
+
+/**
+ * Get all results for a search.  This uses ads_do_paged_search() to return 
+ * all entries in a large search.
+ * @param ads connection to ads server 
+ * @param bind_path Base dn for the search
+ * @param scope Scope of search (LDAP_BASE | LDAP_ONE | LDAP_SUBTREE)
+ * @param exp Search expression
+ * @param attrs Attributes to retrieve
+ * @param res ** which will contain results - free res* with ads_msgfree()
+ * @return status of search
+ **/
+ADS_STATUS ads_do_search_all(ADS_STRUCT *ads, const char *bind_path,
+			     int scope, const char *exp,
+			     const char **attrs, void **res)
+{
+	void *cookie = NULL;
+	int count = 0;
+	ADS_STATUS status;
+
+	status = ads_do_paged_search(ads, bind_path, scope, exp, attrs, res,
+				     &count, &cookie);
+
+	if (!ADS_ERR_OK(status)) return status;
+
+	while (cookie) {
+		void *res2 = NULL;
+		ADS_STATUS status2;
+		LDAPMessage *msg, *next;
+
+		status2 = ads_do_paged_search(ads, bind_path, scope, exp, 
+					      attrs, &res2, &count, &cookie);
+
+		if (!ADS_ERR_OK(status2)) break;
+
+		/* this relies on the way that ldap_add_result_entry() works internally. I hope
+		   that this works on all ldap libs, but I have only tested with openldap */
+		for (msg = ads_first_entry(ads, res2); msg; msg = next) {
+			next = ads_next_entry(ads, msg);
+			ldap_add_result_entry((LDAPMessage **)res, msg);
+		}
+		/* note that we do not free res2, as the memory is now
+                   part of the main returned list */
+	}
+
+	return status;
+}
+
+/**
+ * Run a function on all results for a search.  Uses ads_do_paged_search() and
+ *  runs the function as each page is returned, using ads_process_results()
+ * @param ads connection to ads server
+ * @param bind_path Base dn for the search
+ * @param scope Scope of search (LDAP_BASE | LDAP_ONE | LDAP_SUBTREE)
+ * @param exp Search expression - specified in local charset
+ * @param attrs Attributes to retrieve - specified in UTF-8 or ascii
+ * @param fn Function which takes attr name, values list, and data_area
+ * @param data_area Pointer which is passed to function on each call
+ * @return status of search
+ **/
+ADS_STATUS ads_do_search_all_fn(ADS_STRUCT *ads, const char *bind_path,
+				int scope, const char *exp, const char **attrs,
+				BOOL(*fn)(char *, void **, void *), 
+				void *data_area)
+{
+	void *cookie = NULL;
+	int count = 0;
+	ADS_STATUS status;
+	void *res;
+
+	status = ads_do_paged_search(ads, bind_path, scope, exp, attrs, &res,
+				     &count, &cookie);
+
+	if (!ADS_ERR_OK(status)) return status;
+
+	ads_process_results(ads, res, fn, data_area);
+	ads_msgfree(ads, res);
+
+	while (cookie) {
+		status = ads_do_paged_search(ads, bind_path, scope, exp, attrs,
+					     &res, &count, &cookie);
+
+		if (!ADS_ERR_OK(status)) break;
+		
+		ads_process_results(ads, res, fn, data_area);
+		ads_msgfree(ads, res);
+	}
+
+	return status;
+}
+
+/**
+ * Do a search with a timeout.
+ * @param ads connection to ads server
+ * @param bind_path Base dn for the search
+ * @param scope Scope of search (LDAP_BASE | LDAP_ONE | LDAP_SUBTREE)
+ * @param exp Search expression
+ * @param attrs Attributes to retrieve
+ * @param res ** which will contain results - free res* with ads_msgfree()
+ * @return status of search
+ **/
+ADS_STATUS ads_do_search(ADS_STRUCT *ads, const char *bind_path, int scope, 
+			 const char *exp,
+			 const char **attrs, void **res)
+{
+	struct timeval timeout;
+	int rc;
+	char *utf8_exp, *utf8_path, **search_attrs = NULL;
+	TALLOC_CTX *ctx;
+
+	if (!(ctx = talloc_init("ads_do_search"))) {
+		DEBUG(1,("ads_do_search: talloc_init() failed!"));
+		return ADS_ERROR(LDAP_NO_MEMORY);
+	}
+
+	/* 0 means the conversion worked but the result was empty 
+	   so we only fail if it's negative.  In any case, it always 
+	   at least nulls out the dest */
+	if ((push_utf8_talloc(ctx, &utf8_exp, exp) == (size_t)-1) ||
+	    (push_utf8_talloc(ctx, &utf8_path, bind_path) == (size_t)-1)) {
+		DEBUG(1,("ads_do_search: push_utf8_talloc() failed!"));
+		rc = LDAP_NO_MEMORY;
+		goto done;
+	}
+
+	if (!attrs || !(*attrs))
+		search_attrs = NULL;
+	else {
+		/* This would be the utf8-encoded version...*/
+		/* if (!(search_attrs = ads_push_strvals(ctx, attrs)))  */
+		if (!(str_list_copy(&search_attrs, attrs)))
+		{
+			DEBUG(1,("ads_do_search: str_list_copy() failed!"));
+			rc = LDAP_NO_MEMORY;
+			goto done;
+		}
+	}
+
+	timeout.tv_sec = ADS_SEARCH_TIMEOUT;
+	timeout.tv_usec = 0;
+	*res = NULL;
+
+	/* see the note in ads_do_paged_search - we *must* disable referrals */
+	ldap_set_option(ads->ld, LDAP_OPT_REFERRALS, LDAP_OPT_OFF);
+
+	rc = ldap_search_ext_s(ads->ld, utf8_path, scope, utf8_exp,
+			       search_attrs, 0, NULL, NULL, 
+			       &timeout, LDAP_NO_LIMIT, (LDAPMessage **)res);
+
+	if (rc == LDAP_SIZELIMIT_EXCEEDED) {
+		DEBUG(3,("Warning! sizelimit exceeded in ldap. Truncating.\n"));
+		rc = 0;
+	}
+
+ done:
+	talloc_destroy(ctx);
+	/* if/when we decide to utf8-encode attrs, take out this next line */
+	str_list_free(&search_attrs);
+	return ADS_ERROR(rc);
+}
+/**
+ * Do a general ADS search
+ * @param ads connection to ads server
+ * @param res ** which will contain results - free res* with ads_msgfree()
+ * @param exp Search expression
+ * @param attrs Attributes to retrieve
+ * @return status of search
+ **/
+ADS_STATUS ads_search(ADS_STRUCT *ads, void **res, 
+		      const char *exp, 
+		      const char **attrs)
+{
+	return ads_do_search(ads, ads->config.bind_path, LDAP_SCOPE_SUBTREE, 
+			     exp, attrs, res);
+}
+
+/**
+ * Do a search on a specific DistinguishedName
+ * @param ads connection to ads server
+ * @param res ** which will contain results - free res* with ads_msgfree()
+ * @param dn DistinguishName to search
+ * @param attrs Attributes to retrieve
+ * @return status of search
+ **/
+ADS_STATUS ads_search_dn(ADS_STRUCT *ads, void **res, 
+			 const char *dn, 
+			 const char **attrs)
+{
+	return ads_do_search(ads, dn, LDAP_SCOPE_BASE, "(objectclass=*)", attrs, res);
+}
+
+/**
+ * Free up memory from a ads_search
+ * @param ads connection to ads server
+ * @param msg Search results to free
+ **/
+void ads_msgfree(ADS_STRUCT *ads, void *msg)
+{
+	if (!msg) return;
+	ldap_msgfree(msg);
+}
+
+/**
+ * Free up memory from various ads requests
+ * @param ads connection to ads server
+ * @param mem Area to free
+ **/
+void ads_memfree(ADS_STRUCT *ads, void *mem)
+{
+	SAFE_FREE(mem);
+}
+
+/**
+ * Get a dn from search results
+ * @param ads connection to ads server
+ * @param res Search results
+ * @return dn string
+ **/
+char *ads_get_dn(ADS_STRUCT *ads, void *res)
+{
+	char *utf8_dn, *unix_dn;
+
+	utf8_dn = ldap_get_dn(ads->ld, res);
+	pull_utf8_allocate((void **) &unix_dn, utf8_dn);
+	ldap_memfree(utf8_dn);
+	return unix_dn;
+}
+
+/**
+ * Find a machine account given a hostname
+ * @param ads connection to ads server
+ * @param res ** which will contain results - free res* with ads_msgfree()
+ * @param host Hostname to search for
+ * @return status of search
+ **/
+ADS_STATUS ads_find_machine_acct(ADS_STRUCT *ads, void **res, const char *host)
+{
+	ADS_STATUS status;
+	char *exp;
+	const char *attrs[] = {"*", "nTSecurityDescriptor", NULL};
+
+	/* the easiest way to find a machine account anywhere in the tree
+	   is to look for hostname$ */
+	if (asprintf(&exp, "(samAccountName=%s$)", host) == -1) {
+		DEBUG(1, ("asprintf failed!\n"));
+		return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
+	}
+	
+	status = ads_search(ads, res, exp, attrs);
+	free(exp);
+	return status;
+}
+
+/**
+ * Initialize a list of mods to be used in a modify request
+ * @param ctx An initialized TALLOC_CTX
+ * @return allocated ADS_MODLIST
+ **/
+ADS_MODLIST ads_init_mods(TALLOC_CTX *ctx)
+{
+#define ADS_MODLIST_ALLOC_SIZE 10
+	LDAPMod **mods;
+	
+	if ((mods = (LDAPMod **) talloc_zero(ctx, sizeof(LDAPMod *) * 
+					     (ADS_MODLIST_ALLOC_SIZE + 1))))
+		/* -1 is safety to make sure we don't go over the end.
+		   need to reset it to NULL before doing ldap modify */
+		mods[ADS_MODLIST_ALLOC_SIZE] = (LDAPMod *) -1;
+	
+	return mods;
+}
+
+
+/*
+  add an attribute to the list, with values list already constructed
+*/
+static ADS_STATUS ads_modlist_add(TALLOC_CTX *ctx, ADS_MODLIST *mods, 
+				  int mod_op, const char *name, 
+				  const void **invals)
+{
+	int curmod;
+	LDAPMod **modlist = (LDAPMod **) *mods;
+	struct berval **ber_values = NULL;
+	char **char_values = NULL;
+
+	if (!invals) {
+		mod_op = LDAP_MOD_DELETE;
+	} else {
+		if (mod_op & LDAP_MOD_BVALUES)
+			ber_values = ads_dup_values(ctx, 
+						(const struct berval **)invals);
+		else
+			char_values = ads_push_strvals(ctx, 
+						  (const char **) invals);
+	}
+
+	/* find the first empty slot */
+	for (curmod=0; modlist[curmod] && modlist[curmod] != (LDAPMod *) -1;
+	     curmod++);
+	if (modlist[curmod] == (LDAPMod *) -1) {
+		if (!(modlist = talloc_realloc(ctx, modlist, 
+			(curmod+ADS_MODLIST_ALLOC_SIZE+1)*sizeof(LDAPMod *))))
+			return ADS_ERROR(LDAP_NO_MEMORY);
+		memset(&modlist[curmod], 0, 
+		       ADS_MODLIST_ALLOC_SIZE*sizeof(LDAPMod *));
+		modlist[curmod+ADS_MODLIST_ALLOC_SIZE] = (LDAPMod *) -1;
+		*mods = modlist;
+	}
+		
+	if (!(modlist[curmod] = talloc_zero(ctx, sizeof(LDAPMod))))
+		return ADS_ERROR(LDAP_NO_MEMORY);
+	modlist[curmod]->mod_type = talloc_strdup(ctx, name);
+	if (mod_op & LDAP_MOD_BVALUES) {
+		modlist[curmod]->mod_bvalues = ber_values;
+	} else if (mod_op & LDAP_MOD_DELETE) {
+		modlist[curmod]->mod_values = NULL;
+	} else {
+		modlist[curmod]->mod_values = char_values;
+	}
+
+	modlist[curmod]->mod_op = mod_op;
+	return ADS_ERROR(LDAP_SUCCESS);
+}
+
+/**
+ * Add a single string value to a mod list
+ * @param ctx An initialized TALLOC_CTX
+ * @param mods An initialized ADS_MODLIST
+ * @param name The attribute name to add
+ * @param val The value to add - NULL means DELETE
+ * @return ADS STATUS indicating success of add
+ **/
+ADS_STATUS ads_mod_str(TALLOC_CTX *ctx, ADS_MODLIST *mods, 
+		       const char *name, const char *val)
+{
+	const char *values[2];
+
+	values[0] = val;
+	values[1] = NULL;
+
+	if (!val)
+		return ads_modlist_add(ctx, mods, LDAP_MOD_DELETE, name, NULL);
+	return ads_modlist_add(ctx, mods, LDAP_MOD_REPLACE, name, 
+			       (const void **) values);
+}
+
+/**
+ * Add an array of string values to a mod list
+ * @param ctx An initialized TALLOC_CTX
+ * @param mods An initialized ADS_MODLIST
+ * @param name The attribute name to add
+ * @param vals The array of string values to add - NULL means DELETE
+ * @return ADS STATUS indicating success of add
+ **/
+ADS_STATUS ads_mod_strlist(TALLOC_CTX *ctx, ADS_MODLIST *mods,
+			   const char *name, const char **vals)
+{
+	if (!vals)
+		return ads_modlist_add(ctx, mods, LDAP_MOD_DELETE, name, NULL);
+	return ads_modlist_add(ctx, mods, LDAP_MOD_REPLACE, 
+			       name, (const void **) vals);
+}
+
+/**
+ * Add a single ber-encoded value to a mod list
+ * @param ctx An initialized TALLOC_CTX
+ * @param mods An initialized ADS_MODLIST
+ * @param name The attribute name to add
+ * @param val The value to add - NULL means DELETE
+ * @return ADS STATUS indicating success of add
+ **/
+static ADS_STATUS ads_mod_ber(TALLOC_CTX *ctx, ADS_MODLIST *mods, 
+			      const char *name, const struct berval *val)
+{
+	const struct berval *values[2];
+
+	values[0] = val;
+	values[1] = NULL;
+	if (!val)
+		return ads_modlist_add(ctx, mods, LDAP_MOD_DELETE, name, NULL);
+	return ads_modlist_add(ctx, mods, LDAP_MOD_REPLACE|LDAP_MOD_BVALUES,
+			       name, (const void **) values);
+}
+
+/**
+ * Perform an ldap modify
+ * @param ads connection to ads server
+ * @param mod_dn DistinguishedName to modify
+ * @param mods list of modifications to perform
+ * @return status of modify
+ **/
+ADS_STATUS ads_gen_mod(ADS_STRUCT *ads, const char *mod_dn, ADS_MODLIST mods)
+{
+	int ret,i;
+	char *utf8_dn = NULL;
+	/* 
+	   this control is needed to modify that contains a currently 
+	   non-existent attribute (but allowable for the object) to run
+	*/
+	LDAPControl PermitModify = {
+		ADS_PERMIT_MODIFY_OID,
+		{0, NULL},
+		(char) 1};
+	LDAPControl *controls[2];
+
+	controls[0] = &PermitModify;
+	controls[1] = NULL;
+
+	if (push_utf8_allocate(&utf8_dn, mod_dn) == -1) {
+		return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
+	}
+
+	/* find the end of the list, marked by NULL or -1 */
+	for(i=0;(mods[i]!=0)&&(mods[i]!=(LDAPMod *) -1);i++);
+	/* make sure the end of the list is NULL */
+	mods[i] = NULL;
+	ret = ldap_modify_ext_s(ads->ld, utf8_dn,
+				(LDAPMod **) mods, controls, NULL);
+	SAFE_FREE(utf8_dn);
+	return ADS_ERROR(ret);
+}
+
+/**
+ * Perform an ldap add
+ * @param ads connection to ads server
+ * @param new_dn DistinguishedName to add
+ * @param mods list of attributes and values for DN
+ * @return status of add
+ **/
+ADS_STATUS ads_gen_add(ADS_STRUCT *ads, const char *new_dn, ADS_MODLIST mods)
+{
+	int ret, i;
+	char *utf8_dn = NULL;
+
+	if (push_utf8_allocate(&utf8_dn, new_dn) == -1) {
+		DEBUG(1, ("ads_gen_add: push_utf8_allocate failed!"));
+		return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
+	}
+	
+	/* find the end of the list, marked by NULL or -1 */
+	for(i=0;(mods[i]!=0)&&(mods[i]!=(LDAPMod *) -1);i++);
+	/* make sure the end of the list is NULL */
+	mods[i] = NULL;
+
+	ret = ldap_add_s(ads->ld, utf8_dn, mods);
+	SAFE_FREE(utf8_dn);
+	return ADS_ERROR(ret);
+}
+
+/**
+ * Delete a DistinguishedName
+ * @param ads connection to ads server
+ * @param new_dn DistinguishedName to delete
+ * @return status of delete
+ **/
+ADS_STATUS ads_del_dn(ADS_STRUCT *ads, char *del_dn)
+{
+	int ret;
+	char *utf8_dn = NULL;
+	if (push_utf8_allocate(&utf8_dn, del_dn) == -1) {
+		DEBUG(1, ("ads_del_dn: push_utf8_allocate failed!"));
+		return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
+	}
+	
+	ret = ldap_delete(ads->ld, utf8_dn);
+	return ADS_ERROR(ret);
+}
+
+/**
+ * Build an org unit string
+ *  if org unit is Computers or blank then assume a container, otherwise
+ *  assume a \ separated list of organisational units
+ * @param org_unit Organizational unit
+ * @return org unit string - caller must free
+ **/
+char *ads_ou_string(const char *org_unit)
+{	
+	if (!org_unit || !*org_unit || strcasecmp(org_unit, "Computers") == 0) {
+		return strdup("cn=Computers");
+	}
+
+	return ads_build_path(org_unit, "\\/", "ou=", 1);
+}
+
+
+
+/*
+  add a machine account to the ADS server
+*/
+static ADS_STATUS ads_add_machine_acct(ADS_STRUCT *ads, const char *hostname, 
+				       const char *org_unit)
+{
+	ADS_STATUS ret, status;
+	char *host_spn, *host_upn, *new_dn, *samAccountName, *controlstr;
+	char *ou_str;
+	TALLOC_CTX *ctx;
+	ADS_MODLIST mods;
+	const char *objectClass[] = {"top", "person", "organizationalPerson",
+				     "user", "computer", NULL};
+	const char *servicePrincipalName[5] = {NULL, NULL, NULL, NULL, NULL};
+	char *psp, *psp2;
+	unsigned acct_control;
+
+	if (!(ctx = talloc_init("machine_account")))
+		return ADS_ERROR(LDAP_NO_MEMORY);
+
+	ret = ADS_ERROR(LDAP_NO_MEMORY);
+
+	if (!(host_spn = talloc_asprintf(ctx, "HOST/%s", hostname)))
+		goto done;
+	if (!(host_upn = talloc_asprintf(ctx, "%s@%s", host_spn, ads->config.realm)))
+		goto done;
+	ou_str = ads_ou_string(org_unit);
+	if (!ou_str) {
+		DEBUG(1, ("ads_ou_string returned NULL (malloc failure?)\n"));
+		goto done;
+	}
+	new_dn = talloc_asprintf(ctx, "cn=%s,%s,%s", hostname, ou_str, 
+				 ads->config.bind_path);
+	servicePrincipalName[0] = talloc_asprintf(ctx, "HOST/%s", hostname);
+	psp = talloc_asprintf(ctx, "HOST/%s.%s", 
+			      hostname, 
+			      ads->config.realm);
+	strlower(&psp[5]);
+	servicePrincipalName[1] = psp;
+	servicePrincipalName[2] = talloc_asprintf(ctx, "CIFS/%s", hostname);
+	psp2 = talloc_asprintf(ctx, "CIFS/%s.%s", 
+			       hostname, 
+			       ads->config.realm);
+	strlower(&psp2[5]);
+	servicePrincipalName[3] = psp2;
+
+	free(ou_str);
+	if (!new_dn)
+		goto done;
+
+	if (!(samAccountName = talloc_asprintf(ctx, "%s$", hostname)))
+		goto done;
+
+	acct_control = UF_WORKSTATION_TRUST_ACCOUNT | UF_DONT_EXPIRE_PASSWD;
+#ifndef ENCTYPE_ARCFOUR_HMAC
+	acct_control |= UF_USE_DES_KEY_ONLY;
+#endif
+	if (!(controlstr = talloc_asprintf(ctx, "%u", acct_control)))
+		goto done;
+
+	if (!(mods = ads_init_mods(ctx)))
+		goto done;
+	
+	ads_mod_str(ctx, &mods, "cn", hostname);
+	ads_mod_str(ctx, &mods, "sAMAccountName", samAccountName);
+	ads_mod_strlist(ctx, &mods, "objectClass", objectClass);
+	ads_mod_str(ctx, &mods, "userPrincipalName", host_upn);
+	ads_mod_strlist(ctx, &mods, "servicePrincipalName", servicePrincipalName);
+	ads_mod_str(ctx, &mods, "dNSHostName", hostname);
+	ads_mod_str(ctx, &mods, "userAccountControl", controlstr);
+	ads_mod_str(ctx, &mods, "operatingSystem", "Samba");
+	ads_mod_str(ctx, &mods, "operatingSystemVersion", VERSION);
+
+	ret = ads_gen_add(ads, new_dn, mods);
+
+	if (!ADS_ERR_OK(ret))
+		goto done;
+
+	/* Do not fail if we can't set security descriptor
+	 * it shouldn't be mandatory and probably we just 
+	 * don't have enough rights to do it.
+	 */
+	status = ads_set_machine_sd(ads, hostname, new_dn);
+
+	if (!ADS_ERR_OK(status)) {
+		DEBUG(0, ("Warning: ads_set_machine_sd: %s\n",
+				ads_errstr(status)));
+	}
+done:
+	talloc_destroy(ctx);
+	return ret;
+}
+
+/*
+  dump a binary result from ldap
+*/
+static void dump_binary(const char *field, struct berval **values)
+{
+	int i, j;
+	for (i=0; values[i]; i++) {
+		printf("%s: ", field);
+		for (j=0; j<values[i]->bv_len; j++) {
+			printf("%02X", (unsigned char)values[i]->bv_val[j]);
+		}
+		printf("\n");
+	}
+}
+
+struct uuid {
+        uint32   i1;
+        uint16   i2;
+        uint16   i3;
+        uint8    s[8];
+};
+
+static void dump_guid(const char *field, struct berval **values)
+{
+	int i;
+	GUID guid;
+	TALLOC_CTX *mem_ctx;
+	mem_ctx = talloc_init("dump_guid");
+	if (!mem_ctx) return;
+	for (i=0; values[i]; i++) {
+		memcpy(guid.info, values[i]->bv_val, sizeof(guid.info));
+		printf("%s: %s\n", field, uuid_string(mem_ctx, guid));
+	}
+	talloc_destroy(mem_ctx);
+}
+
+/*
+  dump a sid result from ldap
+*/
+static void dump_sid(const char *field, struct berval **values)
+{
+	int i;
+	for (i=0; values[i]; i++) {
+		DOM_SID sid;
+		sid_parse(values[i]->bv_val, values[i]->bv_len, &sid);
+		printf("%s: %s\n", field, sid_string_static(&sid));
+	}
+}
+
+/*
+  dump ntSecurityDescriptor
+*/
+static void dump_sd(const char *filed, struct berval **values)
+{
+	prs_struct ps;
+	
+	SEC_DESC   *psd = 0;
+	TALLOC_CTX *ctx = 0;
+
+	if (!(ctx = talloc_init("sec_io_desc")))
+		return;
+
+	/* prepare data */
+	prs_init(&ps, values[0]->bv_len, ctx, UNMARSHALL);
+	prs_copy_data_in(&ps, values[0]->bv_val, values[0]->bv_len);
+	prs_set_offset(&ps,0);
+
+	/* parse secdesc */
+	if (!sec_io_desc("sd", &psd, &ps, 1)) {
+		prs_mem_free(&ps);
+		talloc_destroy(ctx);
+		return;
+	}
+	if (psd) ads_disp_sd(psd);
+
+	prs_mem_free(&ps);
+	talloc_destroy(ctx);
+}
+
+/*
+  dump a string result from ldap
+*/
+static void dump_string(const char *field, char **values)
+{
+	int i;
+	for (i=0; values[i]; i++) {
+		printf("%s: %s\n", field, values[i]);
+	}
+}
+
+/*
+  dump a field from LDAP on stdout
+  used for debugging
+*/
+
+static BOOL ads_dump_field(char *field, void **values, void *data_area)
+{
+	const struct {
+		const char *name;
+		BOOL string;
+		void (*handler)(const char *, struct berval **);
+	} handlers[] = {
+		{"objectGUID", False, dump_guid},
+		{"nTSecurityDescriptor", False, dump_sd},
+		{"dnsRecord", False, dump_binary},
+		{"objectSid", False, dump_sid},
+		{"tokenGroups", False, dump_sid},
+		{NULL, True, NULL}
+	};
+	int i;
+
+	if (!field) { /* must be end of an entry */
+		printf("\n");
+		return False;
+	}
+
+	for (i=0; handlers[i].name; i++) {
+		if (StrCaseCmp(handlers[i].name, field) == 0) {
+			if (!values) /* first time, indicate string or not */
+				return handlers[i].string;
+			handlers[i].handler(field, (struct berval **) values);
+			break;
+		}
+	}
+	if (!handlers[i].name) {
+		if (!values) /* first time, indicate string conversion */
+			return True;
+		dump_string(field, (char **)values);
+	}
+	return False;
+}
+
+/**
+ * Dump a result from LDAP on stdout
+ *  used for debugging
+ * @param ads connection to ads server
+ * @param res Results to dump
+ **/
+
+void ads_dump(ADS_STRUCT *ads, void *res)
+{
+	ads_process_results(ads, res, ads_dump_field, NULL);
+}
+
+/**
+ * Walk through results, calling a function for each entry found.
+ *  The function receives a field name, a berval * array of values,
+ *  and a data area passed through from the start.  The function is
+ *  called once with null for field and values at the end of each
+ *  entry.
+ * @param ads connection to ads server
+ * @param res Results to process
+ * @param fn Function for processing each result
+ * @param data_area user-defined area to pass to function
+ **/
+void ads_process_results(ADS_STRUCT *ads, void *res,
+			 BOOL(*fn)(char *, void **, void *),
+			 void *data_area)
+{
+	void *msg;
+	TALLOC_CTX *ctx;
+
+	if (!(ctx = talloc_init("ads_process_results")))
+		return;
+
+	for (msg = ads_first_entry(ads, res); msg; 
+	     msg = ads_next_entry(ads, msg)) {
+		char *utf8_field;
+		BerElement *b;
+	
+		for (utf8_field=ldap_first_attribute(ads->ld,
+						     (LDAPMessage *)msg,&b); 
+		     utf8_field;
+		     utf8_field=ldap_next_attribute(ads->ld,
+						    (LDAPMessage *)msg,b)) {
+			struct berval **ber_vals;
+			char **str_vals, **utf8_vals;
+			char *field;
+			BOOL string; 
+
+			pull_utf8_talloc(ctx, &field, utf8_field);
+			string = fn(field, NULL, data_area);
+
+			if (string) {
+				utf8_vals = ldap_get_values(ads->ld,
+					       	 (LDAPMessage *)msg, field);
+				str_vals = ads_pull_strvals(ctx, 
+						  (const char **) utf8_vals);
+				fn(field, (void **) str_vals, data_area);
+				ldap_value_free(utf8_vals);
+			} else {
+				ber_vals = ldap_get_values_len(ads->ld, 
+						 (LDAPMessage *)msg, field);
+				fn(field, (void **) ber_vals, data_area);
+
+				ldap_value_free_len(ber_vals);
+			}
+			ldap_memfree(utf8_field);
+		}
+		ber_free(b, 0);
+		talloc_destroy_pool(ctx);
+		fn(NULL, NULL, data_area); /* completed an entry */
+
+	}
+	talloc_destroy(ctx);
+}
+
+/**
+ * count how many replies are in a LDAPMessage
+ * @param ads connection to ads server
+ * @param res Results to count
+ * @return number of replies
+ **/
+int ads_count_replies(ADS_STRUCT *ads, void *res)
+{
+	return ldap_count_entries(ads->ld, (LDAPMessage *)res);
+}
+
+/**
+ * Join a machine to a realm
+ *  Creates the machine account and sets the machine password
+ * @param ads connection to ads server
+ * @param hostname name of host to add
+ * @param org_unit Organizational unit to place machine in
+ * @return status of join
+ **/
+ADS_STATUS ads_join_realm(ADS_STRUCT *ads, const char *hostname, const char *org_unit)
+{
+	ADS_STATUS status;
+	LDAPMessage *res;
+	char *host;
+
+	/* hostname must be lowercase */
+	host = strdup(hostname);
+	strlower(host);
+
+	status = ads_find_machine_acct(ads, (void **)&res, host);
+	if (ADS_ERR_OK(status) && ads_count_replies(ads, res) == 1) {
+		DEBUG(0, ("Host account for %s already exists - deleting old account\n", host));
+		status = ads_leave_realm(ads, host);
+		if (!ADS_ERR_OK(status)) {
+			DEBUG(0, ("Failed to delete host '%s' from the '%s' realm.\n", 
+				  host, ads->config.realm));
+			return status;
+		}
+	}
+
+	status = ads_add_machine_acct(ads, host, org_unit);
+	if (!ADS_ERR_OK(status)) {
+		DEBUG(0, ("ads_add_machine_acct: %s\n", ads_errstr(status)));
+		return status;
+	}
+
+	status = ads_find_machine_acct(ads, (void **)&res, host);
+	if (!ADS_ERR_OK(status)) {
+		DEBUG(0, ("Host account test failed\n"));
+		return status;
+	}
+
+	free(host);
+
+	return status;
+}
+
+/**
+ * Delete a machine from the realm
+ * @param ads connection to ads server
+ * @param hostname Machine to remove
+ * @return status of delete
+ **/
+ADS_STATUS ads_leave_realm(ADS_STRUCT *ads, const char *hostname)
+{
+	ADS_STATUS status;
+	void *res;
+	char *hostnameDN, *host; 
+	int rc;
+
+	/* hostname must be lowercase */
+	host = strdup(hostname);
+	strlower(host);
+
+	status = ads_find_machine_acct(ads, &res, host);
+	if (!ADS_ERR_OK(status)) {
+	    DEBUG(0, ("Host account for %s does not exist.\n", host));
+	    return status;
+	}
+
+	hostnameDN = ads_get_dn(ads, (LDAPMessage *)res);
+	rc = ldap_delete_s(ads->ld, hostnameDN);
+	ads_memfree(ads, hostnameDN);
+	if (rc != LDAP_SUCCESS) {
+		return ADS_ERROR(rc);
+	}
+
+	status = ads_find_machine_acct(ads, &res, host);
+	if (ADS_ERR_OK(status) && ads_count_replies(ads, res) == 1) {
+		DEBUG(0, ("Failed to remove host account.\n"));
+		return status;
+	}
+
+	free(host);
+
+	return status;
+}
+
+/**
+ * add machine account to existing security descriptor 
+ * @param ads connection to ads server
+ * @param hostname machine to add
+ * @param dn DN of security descriptor
+ * @return status
+ **/
+ADS_STATUS ads_set_machine_sd(ADS_STRUCT *ads, const char *hostname, char *dn)
+{
+	const char     *attrs[] = {"nTSecurityDescriptor", "objectSid", 0};
+	char           *exp     = 0;
+	size_t          sd_size = 0;
+	struct berval   bval = {0, NULL};
+	prs_struct      ps_wire;
+	char           *escaped_hostname = escape_ldap_string_alloc(hostname);
+
+	LDAPMessage *res  = 0;
+	LDAPMessage *msg  = 0;
+	ADS_MODLIST  mods = 0;
+
+	NTSTATUS    status;
+	ADS_STATUS  ret;
+	DOM_SID     sid;
+	SEC_DESC   *psd = NULL;
+	TALLOC_CTX *ctx = NULL;	
+
+	/* Avoid segmentation fault in prs_mem_free if
+	 * we have to bail out before prs_init */
+	ps_wire.is_dynamic = False;
+
+	if (!ads) return ADS_ERROR(LDAP_SERVER_DOWN);
+
+	ret = ADS_ERROR(LDAP_SUCCESS);
+
+	if (!escaped_hostname) {
+		return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
+	}
+
+	if (asprintf(&exp, "(samAccountName=%s$)", escaped_hostname) == -1) {
+		DEBUG(1, ("ads_set_machine_sd: asprintf failed!\n"));
+		SAFE_FREE(escaped_hostname);
+		return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
+	}
+
+	SAFE_FREE(escaped_hostname);
+
+	ret = ads_search(ads, (void *) &res, exp, attrs);
+
+	if (!ADS_ERR_OK(ret)) return ret;
+
+	if ( !(msg = ads_first_entry(ads, res) )) {
+		ret = ADS_ERROR(LDAP_NO_RESULTS_RETURNED);
+		goto ads_set_sd_error;
+	}
+
+	if (!ads_pull_sid(ads, msg, attrs[1], &sid)) {
+		ret = ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
+		goto ads_set_sd_error;
+	}
+
+	if (!(ctx = talloc_init("sec_io_desc"))) {
+		ret =  ADS_ERROR(LDAP_NO_MEMORY);
+		goto ads_set_sd_error;
+	}
+
+	if (!ads_pull_sd(ads, ctx, msg, attrs[0], &psd)) {
+		ret = ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
+		goto ads_set_sd_error;
+	}
+
+	status = sec_desc_add_sid(ctx, &psd, &sid, SEC_RIGHTS_FULL_CTRL, &sd_size);
+
+	if (!NT_STATUS_IS_OK(status)) {
+		ret = ADS_ERROR_NT(status);
+		goto ads_set_sd_error;
+	}
+
+	if (!prs_init(&ps_wire, sd_size, ctx, MARSHALL)) {
+		ret = ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
+	}
+
+	if (!sec_io_desc("sd_wire", &psd, &ps_wire, 1)) {
+		ret = ADS_ERROR(LDAP_NO_MEMORY);
+		goto ads_set_sd_error;
+	}
+
+#if 0
+	file_save("/tmp/sec_desc.new", ps_wire.data_p, sd_size);
+#endif
+	if (!(mods = ads_init_mods(ctx))) return ADS_ERROR(LDAP_NO_MEMORY);
+
+	bval.bv_len = prs_offset(&ps_wire);
+	bval.bv_val = talloc(ctx, bval.bv_len);
+	if (!bval.bv_val) {
+		ret = ADS_ERROR(LDAP_NO_MEMORY);
+		goto ads_set_sd_error;
+	}
+
+	prs_set_offset(&ps_wire, 0);
+
+	if (!prs_copy_data_out(bval.bv_val, &ps_wire, bval.bv_len)) {
+		ret = ADS_ERROR(LDAP_NO_MEMORY);
+		goto ads_set_sd_error;		
+	}
+
+	ret = ads_mod_ber(ctx, &mods, attrs[0], &bval);
+	if (ADS_ERR_OK(ret)) {
+		ret = ads_gen_mod(ads, dn, mods);
+	}
+
+ads_set_sd_error:
+	ads_msgfree(ads, res);
+	prs_mem_free(&ps_wire);
+	talloc_destroy(ctx);
+	return ret;
+}
+
+/**
+ * pull the first entry from a ADS result
+ * @param ads connection to ads server
+ * @param res Results of search
+ * @return first entry from result
+ **/
+void *ads_first_entry(ADS_STRUCT *ads, void *res)
+{
+	return (void *)ldap_first_entry(ads->ld, (LDAPMessage *)res);
+}
+
+/**
+ * pull the next entry from a ADS result
+ * @param ads connection to ads server
+ * @param res Results of search
+ * @return next entry from result
+ **/
+void *ads_next_entry(ADS_STRUCT *ads, void *res)
+{
+	return (void *)ldap_next_entry(ads->ld, (LDAPMessage *)res);
+}
+
+/**
+ * pull a single string from a ADS result
+ * @param ads connection to ads server
+ * @param mem_ctx TALLOC_CTX to use for allocating result string
+ * @param msg Results of search
+ * @param field Attribute to retrieve
+ * @return Result string in talloc context
+ **/
+char *ads_pull_string(ADS_STRUCT *ads, 
+		      TALLOC_CTX *mem_ctx, void *msg, const char *field)
+{
+	char **values;
+	char *ret = NULL;
+	char *ux_string;
+	size_t rc;
+
+	values = ldap_get_values(ads->ld, msg, field);
+	if (!values)
+		return NULL;
+	
+	if (values[0]) {
+		rc = pull_utf8_talloc(mem_ctx, &ux_string, 
+				      values[0]);
+		if (rc != (size_t)-1)
+			ret = ux_string;
+		
+	}
+	ldap_value_free(values);
+	return ret;
+}
+
+/**
+ * pull an array of strings from a ADS result
+ * @param ads connection to ads server
+ * @param mem_ctx TALLOC_CTX to use for allocating result string
+ * @param msg Results of search
+ * @param field Attribute to retrieve
+ * @return Result strings in talloc context
+ **/
+char **ads_pull_strings(ADS_STRUCT *ads, 
+		       TALLOC_CTX *mem_ctx, void *msg, const char *field)
+{
+	char **values;
+	char **ret = NULL;
+	int i, n;
+
+	values = ldap_get_values(ads->ld, msg, field);
+	if (!values)
+		return NULL;
+
+	for (i=0;values[i];i++)
+		/* noop */ ;
+	n = i;
+
+	ret = talloc(mem_ctx, sizeof(char *) * (n+1));
+	if (!ret) {
+		ldap_value_free(values);
+		return NULL;
+	}
+
+	for (i=0;i<n;i++) {
+		if (pull_utf8_talloc(mem_ctx, &ret[i], values[i]) == -1) {
+			ldap_value_free(values);
+			return NULL;
+		}
+	}
+	ret[i] = NULL;
+
+	ldap_value_free(values);
+	return ret;
+}
+
+
+/**
+ * pull a single uint32 from a ADS result
+ * @param ads connection to ads server
+ * @param msg Results of search
+ * @param field Attribute to retrieve
+ * @param v Pointer to int to store result
+ * @return boolean inidicating success
+*/
+BOOL ads_pull_uint32(ADS_STRUCT *ads, 
+		     void *msg, const char *field, uint32 *v)
+{
+	char **values;
+
+	values = ldap_get_values(ads->ld, msg, field);
+	if (!values)
+		return False;
+	if (!values[0]) {
+		ldap_value_free(values);
+		return False;
+	}
+
+	*v = atoi(values[0]);
+	ldap_value_free(values);
+	return True;
+}
+
+/**
+ * pull a single objectGUID from an ADS result
+ * @param ads connection to ADS server
+ * @param msg results of search
+ * @param guid 37-byte area to receive text guid
+ * @return boolean indicating success
+ **/
+BOOL ads_pull_guid(ADS_STRUCT *ads,
+		   void *msg, GUID *guid)
+{
+	char **values;
+
+	values = ldap_get_values(ads->ld, msg, "objectGUID");
+	if (!values)
+		return False;
+	
+	if (values[0]) {
+		memcpy(guid, values[0], sizeof(GUID));
+		ldap_value_free(values);
+		return True;
+	}
+	ldap_value_free(values);
+	return False;
+
+}
+
+
+/**
+ * pull a single DOM_SID from a ADS result
+ * @param ads connection to ads server
+ * @param msg Results of search
+ * @param field Attribute to retrieve
+ * @param sid Pointer to sid to store result
+ * @return boolean inidicating success
+*/
+BOOL ads_pull_sid(ADS_STRUCT *ads, 
+		  void *msg, const char *field, DOM_SID *sid)
+{
+	struct berval **values;
+	BOOL ret = False;
+
+	values = ldap_get_values_len(ads->ld, msg, field);
+
+	if (!values)
+		return False;
+
+	if (values[0])
+		ret = sid_parse(values[0]->bv_val, values[0]->bv_len, sid);
+	
+	ldap_value_free_len(values);
+	return ret;
+}
+
+/**
+ * pull an array of DOM_SIDs from a ADS result
+ * @param ads connection to ads server
+ * @param mem_ctx TALLOC_CTX for allocating sid array
+ * @param msg Results of search
+ * @param field Attribute to retrieve
+ * @param sids pointer to sid array to allocate
+ * @return the count of SIDs pulled
+ **/
+int ads_pull_sids(ADS_STRUCT *ads, TALLOC_CTX *mem_ctx,
+		  void *msg, const char *field, DOM_SID **sids)
+{
+	struct berval **values;
+	BOOL ret;
+	int count, i;
+
+	values = ldap_get_values_len(ads->ld, msg, field);
+
+	if (!values)
+		return 0;
+
+	for (i=0; values[i]; i++)
+		/* nop */ ;
+
+	(*sids) = talloc(mem_ctx, sizeof(DOM_SID) * i);
+	if (!(*sids)) {
+		ldap_value_free_len(values);
+		return 0;
+	}
+
+	count = 0;
+	for (i=0; values[i]; i++) {
+		ret = sid_parse(values[i]->bv_val, values[i]->bv_len, &(*sids)[count]);
+		if (ret) {
+			fstring sid;
+			DEBUG(10, ("pulling SID: %s\n", sid_to_string(sid, &(*sids)[count])));
+			count++;
+		}
+	}
+	
+	ldap_value_free_len(values);
+	return count;
+}
+
+/**
+ * pull a SEC_DESC from a ADS result
+ * @param ads connection to ads server
+ * @param mem_ctx TALLOC_CTX for allocating sid array
+ * @param msg Results of search
+ * @param field Attribute to retrieve
+ * @param sd Pointer to *SEC_DESC to store result (talloc()ed)
+ * @return boolean inidicating success
+*/
+BOOL ads_pull_sd(ADS_STRUCT *ads, TALLOC_CTX *mem_ctx,
+		  void *msg, const char *field, SEC_DESC **sd)
+{
+	struct berval **values;
+	prs_struct      ps;
+	BOOL ret = False;
+
+	values = ldap_get_values_len(ads->ld, msg, field);
+
+	if (!values) return False;
+
+	if (values[0]) {
+		prs_init(&ps, values[0]->bv_len, mem_ctx, UNMARSHALL);
+		prs_copy_data_in(&ps, values[0]->bv_val, values[0]->bv_len);
+		prs_set_offset(&ps,0);
+
+		ret = sec_io_desc("sd", sd, &ps, 1);
+	}
+	
+	ldap_value_free_len(values);
+	return ret;
+}
+
+/* 
+ * in order to support usernames longer than 21 characters we need to 
+ * use both the sAMAccountName and the userPrincipalName attributes 
+ * It seems that not all users have the userPrincipalName attribute set
+ *
+ * @param ads connection to ads server
+ * @param mem_ctx TALLOC_CTX for allocating sid array
+ * @param msg Results of search
+ * @return the username
+ */
+char *ads_pull_username(ADS_STRUCT *ads, TALLOC_CTX *mem_ctx, void *msg)
+{
+	char *ret, *p;
+
+	ret = ads_pull_string(ads, mem_ctx, msg, "userPrincipalName");
+	if (ret && (p = strchr(ret, '@'))) {
+		*p = 0;
+		return ret;
+	}
+	return ads_pull_string(ads, mem_ctx, msg, "sAMAccountName");
+}
+
+
+/**
+ * find the update serial number - this is the core of the ldap cache
+ * @param ads connection to ads server
+ * @param ads connection to ADS server
+ * @param usn Pointer to retrieved update serial number
+ * @return status of search
+ **/
+ADS_STATUS ads_USN(ADS_STRUCT *ads, uint32 *usn)
+{
+	const char *attrs[] = {"highestCommittedUSN", NULL};
+	ADS_STATUS status;
+	void *res;
+
+	status = ads_do_search(ads, "", LDAP_SCOPE_BASE, "(objectclass=*)", attrs, &res);
+	if (!ADS_ERR_OK(status)) return status;
+
+	if (ads_count_replies(ads, res) != 1) {
+		return ADS_ERROR(LDAP_NO_RESULTS_RETURNED);
+	}
+
+	ads_pull_uint32(ads, res, "highestCommittedUSN", usn);
+	ads_msgfree(ads, res);
+	return ADS_SUCCESS;
+}
+
+/* parse a ADS timestring - typical string is
+   '20020917091222.0Z0' which means 09:12.22 17th September
+   2002, timezone 0 */
+static time_t ads_parse_time(const char *str)
+{
+	struct tm tm;
+
+	ZERO_STRUCT(tm);
+
+	if (sscanf(str, "%4d%2d%2d%2d%2d%2d", 
+		   &tm.tm_year, &tm.tm_mon, &tm.tm_mday, 
+		   &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) {
+		return 0;
+	}
+	tm.tm_year -= 1900;
+	tm.tm_mon -= 1;
+
+	return timegm(&tm);
+}
+
+
+/**
+ * Find the servers name and realm - this can be done before authentication 
+ *  The ldapServiceName field on w2k  looks like this:
+ *    vnet3.home.samba.org:win2000-vnet3$@VNET3.HOME.SAMBA.ORG
+ * @param ads connection to ads server
+ * @return status of search
+ **/
+ADS_STATUS ads_server_info(ADS_STRUCT *ads)
+{
+	const char *attrs[] = {"ldapServiceName", "currentTime", NULL};
+	ADS_STATUS status;
+	void *res;
+	char *value;
+	char *p;
+	char *timestr;
+	TALLOC_CTX *ctx;
+
+	if (!(ctx = talloc_init("ads_server_info"))) {
+		return ADS_ERROR(LDAP_NO_MEMORY);
+	}
+
+	status = ads_do_search(ads, "", LDAP_SCOPE_BASE, "(objectclass=*)", attrs, &res);
+	if (!ADS_ERR_OK(status)) return status;
+
+	value = ads_pull_string(ads, ctx, res, "ldapServiceName");
+	if (!value) {
+		return ADS_ERROR(LDAP_NO_RESULTS_RETURNED);
+	}
+
+	timestr = ads_pull_string(ads, ctx, res, "currentTime");
+	if (!timestr) {
+		return ADS_ERROR(LDAP_NO_RESULTS_RETURNED);
+	}
+
+	ldap_msgfree(res);
+
+	p = strchr(value, ':');
+	if (!p) {
+		talloc_destroy(ctx);
+		DEBUG(1, ("ads_server_info: returned ldap server name did not contain a ':' so was deemed invalid\n"));
+		return ADS_ERROR(LDAP_DECODING_ERROR);
+	}
+
+	SAFE_FREE(ads->config.ldap_server_name);
+
+	ads->config.ldap_server_name = strdup(p+1);
+	p = strchr(ads->config.ldap_server_name, '$');
+	if (!p || p[1] != '@') {
+		talloc_destroy(ctx);
+		DEBUG(1, ("ads_server_info: returned ldap server name (%s) does not contain '$@' so was deemed invalid\n", ads->config.ldap_server_name));
+		SAFE_FREE(ads->config.ldap_server_name);
+		return ADS_ERROR(LDAP_DECODING_ERROR);
+	}
+
+	*p = 0;
+
+	SAFE_FREE(ads->config.realm);
+	SAFE_FREE(ads->config.bind_path);
+
+	ads->config.realm = strdup(p+2);
+	ads->config.bind_path = ads_build_dn(ads->config.realm);
+
+	DEBUG(3,("got ldap server name %s@%s, using bind path: %s\n", 
+		 ads->config.ldap_server_name, ads->config.realm,
+		 ads->config.bind_path));
+
+	ads->config.current_time = ads_parse_time(timestr);
+
+	if (ads->config.current_time != 0) {
+		ads->auth.time_offset = ads->config.current_time - time(NULL);
+		DEBUG(4,("time offset is %d seconds\n", ads->auth.time_offset));
+	}
+
+	talloc_destroy(ctx);
+
+	return ADS_SUCCESS;
+}
+
+
+/**
+ * find the list of trusted domains
+ * @param ads connection to ads server
+ * @param mem_ctx TALLOC_CTX for allocating results
+ * @param num_trusts pointer to number of trusts
+ * @param names pointer to trusted domain name list
+ * @param sids pointer to list of sids of trusted domains
+ * @return the count of SIDs pulled
+ **/
+ADS_STATUS ads_trusted_domains(ADS_STRUCT *ads, TALLOC_CTX *mem_ctx, 
+			       int *num_trusts, 
+			       char ***names, 
+			       char ***alt_names,
+			       DOM_SID **sids)
+{
+	const char *attrs[] = {"name", "flatname", "securityIdentifier", 
+			       "trustDirection", NULL};
+	ADS_STATUS status;
+	void *res, *msg;
+	int count, i;
+
+	*num_trusts = 0;
+
+	status = ads_search(ads, &res, "(objectcategory=trustedDomain)", attrs);
+	if (!ADS_ERR_OK(status)) return status;
+
+	count = ads_count_replies(ads, res);
+	if (count == 0) {
+		ads_msgfree(ads, res);
+		return ADS_ERROR(LDAP_NO_RESULTS_RETURNED);
+	}
+
+	(*names) = talloc(mem_ctx, sizeof(char *) * count);
+	(*alt_names) = talloc(mem_ctx, sizeof(char *) * count);
+	(*sids) = talloc(mem_ctx, sizeof(DOM_SID) * count);
+	if (! *names || ! *sids) return ADS_ERROR(LDAP_NO_MEMORY);
+
+	for (i=0, msg = ads_first_entry(ads, res); msg; msg = ads_next_entry(ads, msg)) {
+		uint32 direction;
+
+		/* direction is a 2 bit bitfield, 1 means they trust us 
+		   but we don't trust them, so we should not list them
+		   as users from that domain can't login */
+		if (ads_pull_uint32(ads, msg, "trustDirection", &direction) &&
+		    direction == 1) {
+			continue;
+		}
+		
+		(*names)[i] = ads_pull_string(ads, mem_ctx, msg, "name");
+		(*alt_names)[i] = ads_pull_string(ads, mem_ctx, msg, "flatname");
+
+		if ((*alt_names)[i] && (*alt_names)[i][0]) {
+			/* we prefer the flatname as the primary name
+			   for consistency with RPC */
+			char *name = (*alt_names)[i];
+			(*alt_names)[i] = (*names)[i];
+			(*names)[i] = name;
+		}
+		if (ads_pull_sid(ads, msg, "securityIdentifier", &(*sids)[i])) {
+			i++;
+		}
+	}
+
+	ads_msgfree(ads, res);
+
+	*num_trusts = i;
+
+	return ADS_SUCCESS;
+}
+
+/**
+ * find the domain sid for our domain
+ * @param ads connection to ads server
+ * @param sid Pointer to domain sid
+ * @return status of search
+ **/
+ADS_STATUS ads_domain_sid(ADS_STRUCT *ads, DOM_SID *sid)
+{
+	const char *attrs[] = {"objectSid", NULL};
+	void *res;
+	ADS_STATUS rc;
+
+	rc = ads_do_search(ads, ads->config.bind_path, LDAP_SCOPE_BASE, "(objectclass=*)", 
+			   attrs, &res);
+	if (!ADS_ERR_OK(rc)) return rc;
+	if (!ads_pull_sid(ads, res, "objectSid", sid)) {
+		return ADS_ERROR_SYSTEM(ENOENT);
+	}
+	ads_msgfree(ads, res);
+	
+	return ADS_SUCCESS;
+}
+
+/* this is rather complex - we need to find the allternate (netbios) name
+   for the domain, but there isn't a simple query to do this. Instead
+   we look for the principle names on the DCs account and find one that has 
+   the right form, then extract the netbios name of the domain from that
+
+   NOTE! better method is this:
+
+bin/net -Uadministrator%XXXXX ads search '(&(objectclass=crossref)(dnsroot=VNET3.HOME.SAMBA.ORG))'  nETBIOSName 
+
+but you need to force the bind path to match the configurationNamingContext from the rootDSE
+
+*/
+ADS_STATUS ads_workgroup_name(ADS_STRUCT *ads, TALLOC_CTX *mem_ctx, char **workgroup)
+{
+	char *exp;
+	ADS_STATUS rc;
+	char **principles;
+	char *prefix;
+	int prefix_length;
+	int i;
+	void *res;
+	const char *attrs[] = {"servicePrincipalName", NULL};
+
+	(*workgroup) = NULL;
+
+	asprintf(&exp, "(&(objectclass=computer)(dnshostname=%s.%s))", 
+		 ads->config.ldap_server_name, ads->config.realm);
+	rc = ads_search(ads, &res, exp, attrs);
+	free(exp);
+
+	if (!ADS_ERR_OK(rc)) {
+		return rc;
+	}
+
+	principles = ads_pull_strings(ads, mem_ctx, res, "servicePrincipalName");
+
+	ads_msgfree(ads, res);
+
+	if (!principles) {
+		return ADS_ERROR(LDAP_NO_RESULTS_RETURNED);
+	}
+
+	asprintf(&prefix, "HOST/%s.%s/", 
+		 ads->config.ldap_server_name, 
+		 ads->config.realm);
+
+	prefix_length = strlen(prefix);
+
+	for (i=0;principles[i]; i++) {
+		if (strncasecmp(principles[i], prefix, prefix_length) == 0 &&
+		    strcasecmp(ads->config.realm, principles[i]+prefix_length) != 0 &&
+		    !strchr(principles[i]+prefix_length, '.')) {
+			/* found an alternate (short) name for the domain. */
+			DEBUG(3,("Found alternate name '%s' for realm '%s'\n",
+				 principles[i]+prefix_length, 
+				 ads->config.realm));
+			(*workgroup) = talloc_strdup(mem_ctx, principles[i]+prefix_length);
+			break;
+		}
+	}
+	free(prefix);
+
+	if (!*workgroup) {
+		return ADS_ERROR(LDAP_NO_RESULTS_RETURNED);
+	}
+	
+	return ADS_SUCCESS;
+}
+
+#endif