first public release of samba4 code

(This used to be commit b0510b5428b3461aeb9bbe3cc95f62fc73e2b97f)

1 files changed, 1338 insertions, 0 deletions

diff --git a/source4/sam/interface.c b/source4/sam/interface.c
new file mode 100644
index 0000000000..51ae561999
--- /dev/null
+++ b/source4/sam/interface.c
@@ -0,0 +1,1338 @@
+/*
+   Unix SMB/CIFS implementation.
+   Password and authentication handling
+   Copyright (C) Andrew Bartlett			2002
+   Copyright (C) Jelmer Vernooij			2002
+   Copyright (C) Stefan (metze) Metzmacher		2002
+   Copyright (C) Kai Krüger				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"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_SAM
+
+extern DOM_SID global_sid_Builtin;
+
+/** List of various built-in sam modules */
+
+const struct sam_init_function_entry builtin_sam_init_functions[] = {
+	{ "plugin", sam_init_plugin },
+#ifdef HAVE_LDAP
+	{ "ads", sam_init_ads },
+#endif
+	{ "skel", sam_init_skel },
+	{ NULL, NULL}
+};
+
+
+static NTSTATUS sam_get_methods_by_sid(const SAM_CONTEXT *context, SAM_METHODS **sam_method, const DOM_SID *domainsid)
+{
+	SAM_METHODS	*tmp_methods;
+
+	DEBUG(5,("sam_get_methods_by_sid: %d\n", __LINE__));
+
+	/* invalid sam_context specified */
+	SAM_ASSERT(context && context->methods);
+
+	tmp_methods = context->methods;
+
+	while (tmp_methods) {
+		if (sid_equal(domainsid, &(tmp_methods->domain_sid)))
+		{
+			(*sam_method) = tmp_methods;
+			return NT_STATUS_OK;
+		}
+		tmp_methods = tmp_methods->next;
+	}
+
+	DEBUG(3,("sam_get_methods_by_sid: There is no backend specified for domain %s\n", sid_string_static(domainsid)));
+
+	return NT_STATUS_NO_SUCH_DOMAIN;
+}
+
+static NTSTATUS sam_get_methods_by_name(const SAM_CONTEXT *context, SAM_METHODS **sam_method, const char *domainname)
+{
+	SAM_METHODS	*tmp_methods;
+
+	DEBUG(5,("sam_get_methods_by_name: %d\n", __LINE__));
+
+	/* invalid sam_context specified */
+	SAM_ASSERT(context && context->methods);
+
+	tmp_methods = context->methods;
+
+	while (tmp_methods) {
+		if (strequal(domainname, tmp_methods->domain_name))
+		{
+			(*sam_method) = tmp_methods;
+			return NT_STATUS_OK;
+		}
+		tmp_methods = tmp_methods->next;
+	}
+
+	DEBUG(3,("sam_get_methods_by_sid: There is no backend specified for domain %s\n", domainname));
+
+	return NT_STATUS_NO_SUCH_DOMAIN;
+}
+
+static NTSTATUS make_sam_methods(TALLOC_CTX *mem_ctx, SAM_METHODS **methods)
+{
+	*methods = talloc(mem_ctx, sizeof(SAM_METHODS));
+
+	if (!*methods) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	ZERO_STRUCTP(*methods);
+
+	return NT_STATUS_OK;
+}
+
+/******************************************************************
+  Free and cleanup a sam context, any associated data and anything
+  that the attached modules might have associated.
+ *******************************************************************/
+
+void free_sam_context(SAM_CONTEXT **context)
+{
+	SAM_METHODS *sam_selected = (*context)->methods;
+
+	while (sam_selected) {
+		if (sam_selected->free_private_data) {
+			sam_selected->free_private_data(&(sam_selected->private_data));
+		}
+		sam_selected = sam_selected->next;
+	}
+
+	talloc_destroy((*context)->mem_ctx);
+	*context = NULL;
+}
+
+/******************************************************************
+  Make a backend_entry from scratch
+ *******************************************************************/
+ 
+static NTSTATUS make_backend_entry(SAM_BACKEND_ENTRY *backend_entry, char *sam_backend_string)
+{
+	char *tmp = NULL;
+	char *tmp_string = sam_backend_string;
+	
+	DEBUG(5,("make_backend_entry: %d\n", __LINE__));
+	
+	SAM_ASSERT(sam_backend_string && backend_entry);
+	
+	backend_entry->module_name = sam_backend_string;
+	
+	DEBUG(5,("makeing backend_entry for %s\n", backend_entry->module_name));
+	
+	if ((tmp = strrchr(tmp_string, '|')) != NULL) {
+		DEBUGADD(20,("a domain name has been specified\n"));
+		*tmp = 0;
+		backend_entry->domain_name = smb_xstrdup(tmp + 1);
+		tmp_string = tmp + 1;
+	}
+	
+	if ((tmp = strchr(tmp_string, ':')) != NULL) {
+		DEBUG(20,("options for the backend have been specified\n"));
+		*tmp = 0;
+		backend_entry->module_params = smb_xstrdup(tmp + 1);
+		tmp_string = tmp + 1;
+	}
+		
+	if (backend_entry->domain_name == NULL) {
+		DEBUG(10,("make_backend_entry: no domain was specified for sam module %s. Using default domain %s\n",
+			backend_entry->module_name, lp_workgroup()));
+		backend_entry->domain_name = smb_xstrdup(lp_workgroup());
+	}
+	
+	if ((backend_entry->domain_sid = (DOM_SID *)malloc(sizeof(DOM_SID))) == NULL) {
+		DEBUG(0,("make_backend_entry: failed to malloc domain_sid\n"));
+		return NT_STATUS_NO_MEMORY;
+	}
+	
+	DEBUG(10,("looking up sid for domain %s\n", backend_entry->domain_name));
+	
+	if (!secrets_fetch_domain_sid(backend_entry->domain_name, backend_entry->domain_sid)) {
+		DEBUG(2,("make_backend_entry: There is no SID stored for domain %s. Creating a new one.\n",
+			backend_entry->domain_name));		
+		DEBUG(0, ("FIXME in %s:%d\n", __FILE__, __LINE__));
+		ZERO_STRUCTP(backend_entry->domain_sid);
+	}
+	
+	DEBUG(5,("make_backend_entry: module name: %s, module parameters: %s, domain name: %s, domain sid: %s\n",
+		backend_entry->module_name, backend_entry->module_params, backend_entry->domain_name, sid_string_static(backend_entry->domain_sid)));
+	
+	return NT_STATUS_OK;
+}
+
+/******************************************************************
+ create sam_methods struct based on sam_backend_entry
+ *****************************************************************/
+
+static NTSTATUS make_sam_methods_backend_entry(SAM_CONTEXT *context, SAM_METHODS **methods_ptr, SAM_BACKEND_ENTRY *backend_entry)
+{
+	NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
+	SAM_METHODS *methods;
+	int i;
+
+	DEBUG(5,("make_sam_methods_backend_entry: %d\n", __LINE__));
+
+	if (!NT_STATUS_IS_OK(nt_status = make_sam_methods(context->mem_ctx, methods_ptr))) {
+		return nt_status;
+	}
+
+	methods = *methods_ptr;
+	methods->backendname = talloc_strdup(context->mem_ctx, backend_entry->module_name);
+	methods->domain_name = talloc_strdup(context->mem_ctx, backend_entry->domain_name);
+	sid_copy(&methods->domain_sid, backend_entry->domain_sid);
+	methods->parent = context;
+
+	DEBUG(5,("Attempting to find sam backend %s\n", backend_entry->module_name));
+	for (i = 0; builtin_sam_init_functions[i].module_name; i++)
+	{
+		if (strequal(builtin_sam_init_functions[i].module_name, backend_entry->module_name))
+		{
+			DEBUG(5,("Found sam backend %s (at pos %d)\n", backend_entry->module_name, i));
+			DEBUGADD(5,("initialising it with options=%s for domain %s\n", backend_entry->module_params, sid_string_static(backend_entry->domain_sid)));
+			nt_status = builtin_sam_init_functions[i].init(methods, backend_entry->module_params);
+			if (NT_STATUS_IS_OK(nt_status)) {
+				DEBUG(5,("sam backend %s has a valid init\n", backend_entry->module_name));
+			} else {
+				DEBUG(2,("sam backend %s did not correctly init (error was %s)\n",
+					backend_entry->module_name, nt_errstr(nt_status)));
+			}
+			return nt_status;
+		}
+	}
+	
+	DEBUG(2,("could not find backend %s\n", backend_entry->module_name));
+
+	return NT_STATUS_INVALID_PARAMETER;
+}
+
+static NTSTATUS sam_context_check_default_backends(SAM_CONTEXT *context)
+{
+	SAM_BACKEND_ENTRY entry;
+	DOM_SID *global_sam_sid  = get_global_sam_sid(); /* lp_workgroup doesn't play nicely with multiple domains */
+	SAM_METHODS *methods, *tmpmethods;
+	NTSTATUS ntstatus;
+	
+	DEBUG(5,("sam_context_check_default_backends: %d\n", __LINE__));
+
+	/* Make sure domain lp_workgroup() is available */
+	
+	ntstatus = sam_get_methods_by_sid(context, &methods, &global_sid_Builtin);
+
+	if (NT_STATUS_EQUAL(ntstatus, NT_STATUS_NO_SUCH_DOMAIN)) {
+		DEBUG(4,("There was no backend specified for domain %s(%s); using %s\n",
+			lp_workgroup(), sid_string_static(global_sam_sid), SAM_DEFAULT_BACKEND));
+
+		SAM_ASSERT(global_sam_sid);
+
+		entry.module_name = SAM_DEFAULT_BACKEND;
+		entry.module_params = NULL;
+		entry.domain_name = lp_workgroup();
+		entry.domain_sid = (DOM_SID *)malloc(sizeof(DOM_SID));
+		sid_copy(entry.domain_sid, global_sam_sid);
+
+		if (!NT_STATUS_IS_OK(ntstatus = make_sam_methods_backend_entry(context, &methods, &entry))) {
+			DEBUG(4,("make_sam_methods_backend_entry failed\n"));
+			return ntstatus;
+		}
+
+		DLIST_ADD_END(context->methods, methods, tmpmethods);
+
+	} else if (!NT_STATUS_IS_OK(ntstatus)) {
+		DEBUG(2, ("sam_get_methods_by_sid failed for %s\n", lp_workgroup()));
+		return ntstatus;
+	}
+
+	/* Make sure the BUILTIN domain is available */
+
+	ntstatus = sam_get_methods_by_sid(context, &methods, global_sam_sid);
+	
+	if (NT_STATUS_EQUAL(ntstatus, NT_STATUS_NO_SUCH_DOMAIN)) {
+		DEBUG(4,("There was no backend specified for domain BUILTIN; using %s\n", 
+				 SAM_DEFAULT_BACKEND));
+		entry.module_name = SAM_DEFAULT_BACKEND;
+		entry.module_params = NULL;
+		entry.domain_name = "BUILTIN";
+		entry.domain_sid    = (DOM_SID *)malloc(sizeof(DOM_SID)); 
+		sid_copy(entry.domain_sid, &global_sid_Builtin);
+
+		if (!NT_STATUS_IS_OK(ntstatus = make_sam_methods_backend_entry(context, &methods,  &entry))) {
+			DEBUG(4,("make_sam_methods_backend_entry failed\n"));
+			return ntstatus;
+		}
+
+		DLIST_ADD_END(context->methods, methods, tmpmethods);
+	} else if (!NT_STATUS_IS_OK(ntstatus)) {
+		DEBUG(2, ("sam_get_methods_by_sid failed for BUILTIN\n"));
+		return ntstatus;
+	}
+
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS check_duplicate_backend_entries(SAM_BACKEND_ENTRY **backend_entries, int *nBackends)
+{
+	int i, j;
+	
+	DEBUG(5,("check_duplicate_backend_entries: %d\n", __LINE__));
+	
+	for (i = 0; i < *nBackends; i++) {
+		for (j = i + 1; j < *nBackends; j++) {
+			if (sid_equal((*backend_entries)[i].domain_sid, (*backend_entries)[j].domain_sid)) {
+				DEBUG(0,("two backend modules claim the same domain %s\n",
+					sid_string_static((*backend_entries)[j].domain_sid)));
+				return NT_STATUS_INVALID_PARAMETER;			
+			}
+		}		
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS make_sam_context_list(SAM_CONTEXT **context, char **sam_backends_param)
+{
+	int i = 0, j = 0;
+	SAM_METHODS *curmethods, *tmpmethods;
+	int nBackends               = 0;
+	SAM_BACKEND_ENTRY *backends = NULL;
+	NTSTATUS nt_status          = NT_STATUS_UNSUCCESSFUL;
+
+	DEBUG(5,("make_sam_context_from_conf: %d\n", __LINE__));
+
+	if (!sam_backends_param) {
+		DEBUG(1, ("no SAM backeds specified!\n"));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = make_sam_context(context))) {
+		DEBUG(4,("make_sam_context failed\n"));
+		return nt_status;
+	}
+
+	while (sam_backends_param[nBackends])
+		nBackends++;
+
+	DEBUG(6,("There are %d domains listed with their backends\n", nBackends));
+
+	if ((backends = (SAM_BACKEND_ENTRY *)malloc(sizeof(*backends)*nBackends)) == NULL) {
+		DEBUG(0,("make_sam_context_list: failed to allocate backends\n"));
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	memset(backends, '\0', sizeof(*backends)*nBackends);
+
+	for (i = 0; i < nBackends; i++) {
+		DEBUG(8,("processing %s\n",sam_backends_param[i]));
+		if (!NT_STATUS_IS_OK(nt_status = make_backend_entry(&backends[i], sam_backends_param[i]))) {
+			DEBUG(4,("make_backend_entry failed\n"));
+			for (j = 0; j < nBackends; j++) SAFE_FREE(backends[j].domain_sid);
+			SAFE_FREE(backends);
+			free_sam_context(context);
+			return nt_status;
+		}
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = check_duplicate_backend_entries(&backends, &nBackends))) {
+		DEBUG(4,("check_duplicate_backend_entries failed\n"));
+		for (j = 0; j < nBackends; j++) SAFE_FREE(backends[j].domain_sid);
+		SAFE_FREE(backends);
+		free_sam_context(context);
+		return nt_status;
+	}
+
+	for (i = 0; i < nBackends; i++) {
+		if (!NT_STATUS_IS_OK(nt_status = make_sam_methods_backend_entry(*context, &curmethods,  &backends[i]))) {
+			DEBUG(4,("make_sam_methods_backend_entry failed\n"));
+			for (j = 0; j < nBackends; j++) SAFE_FREE(backends[j].domain_sid);
+			SAFE_FREE(backends);
+			free_sam_context(context);
+			return nt_status;
+		}
+		DLIST_ADD_END((*context)->methods, curmethods, tmpmethods);
+	}
+	
+	for (i = 0; i < nBackends; i++) SAFE_FREE(backends[i].domain_sid);
+
+	SAFE_FREE(backends);
+	return NT_STATUS_OK;
+}
+
+/******************************************************************
+  Make a sam_context from scratch.
+ *******************************************************************/
+
+NTSTATUS make_sam_context(SAM_CONTEXT **context) 
+{
+	TALLOC_CTX *mem_ctx;
+
+	mem_ctx = talloc_init("sam_context internal allocation context");
+
+	if (!mem_ctx) {
+		DEBUG(0, ("make_sam_context: talloc init failed!\n"));
+		return NT_STATUS_NO_MEMORY;
+	}		
+
+	*context = talloc(mem_ctx, sizeof(**context));
+	if (!*context) {
+		DEBUG(0, ("make_sam_context: talloc failed!\n"));
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	ZERO_STRUCTP(*context);
+
+	(*context)->mem_ctx = mem_ctx;
+
+	(*context)->free_fn = free_sam_context;
+
+	return NT_STATUS_OK;
+}
+
+/******************************************************************
+  Return an already initialised sam_context, to facilitate backward 
+  compatibility (see functions below).
+ *******************************************************************/
+
+static struct sam_context *sam_get_static_context(BOOL reload) 
+{
+	static SAM_CONTEXT *sam_context = NULL;
+
+	if ((sam_context) && (reload)) {
+		sam_context->free_fn(&sam_context);
+		sam_context = NULL;
+	}
+
+	if (!sam_context) {
+		if (!NT_STATUS_IS_OK(make_sam_context_list(&sam_context, lp_sam_backend()))) {
+			DEBUG(4,("make_sam_context_list failed\n"));
+			return NULL;
+		}
+
+		/* Make sure the required domains (default domain, builtin) are available */
+		if (!NT_STATUS_IS_OK(sam_context_check_default_backends(sam_context))) {
+			DEBUG(4,("sam_context_check_default_backends failed\n"));
+			return NULL;
+		}
+	}
+
+	return sam_context;
+}
+
+/***************************************************************
+  Initialize the static context (at smbd startup etc). 
+
+  If uninitialised, context will auto-init on first use.
+ ***************************************************************/
+
+BOOL initialize_sam(BOOL reload)
+{	
+	return (sam_get_static_context(reload) != NULL);
+}
+
+
+/**************************************************************
+ External API.  This is what the rest of the world calls...
+***************************************************************/
+
+/******************************************************************
+  sam_* functions are used to link the external SAM interface
+  with the internal backends. These functions lookup the appropriate
+  backends for the domain and pass on to the function in sam_methods
+  in the selected backend
+
+  When the context parmater is NULL, the default is used.
+ *******************************************************************/
+
+#define SAM_SETUP_CONTEXT if (!context) \
+		context = sam_get_static_context(False);\
+	if (!context) {\
+		return NT_STATUS_UNSUCCESSFUL; \
+	}\
+	
+
+
+NTSTATUS sam_get_sec_desc(const SAM_CONTEXT *context, const NT_USER_TOKEN *access_token, const DOM_SID *sid, SEC_DESC **sd)
+{
+	SAM_METHODS	*tmp_methods;
+	NTSTATUS        nt_status;
+
+	DEBUG(5,("sam_get_sec_desc: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_methods_by_sid(context, &tmp_methods, sid))) {
+		DEBUG(4,("sam_get_methods_by_sid failed\n"));
+		return nt_status;
+	}
+
+	if (!tmp_methods->sam_get_sec_desc) {
+		DEBUG(3, ("sam_get_sec_desc: sam_methods of the domain did not specify sam_get_sec_desc\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_get_sec_desc(tmp_methods, access_token, sid, sd))) {
+		DEBUG(4,("sam_get_sec_desc for %s in backend %s failed\n", sid_string_static(sid), tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_set_sec_desc(const SAM_CONTEXT *context, const NT_USER_TOKEN *access_token, const DOM_SID *sid, const SEC_DESC *sd)
+{
+	SAM_METHODS	*tmp_methods;
+	NTSTATUS	nt_status;
+
+	DEBUG(5,("sam_set_sec_desc: %d\n", __LINE__));
+	
+	SAM_SETUP_CONTEXT;
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_methods_by_sid(context, &tmp_methods, sid))) {
+		DEBUG(4,("sam_get_methods_by_sid failed\n"));
+		return nt_status;
+	}
+
+	if (!tmp_methods->sam_set_sec_desc) {
+		DEBUG(3, ("sam_set_sec_desc: sam_methods of the domain did not specify sam_set_sec_desc\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_set_sec_desc(tmp_methods, access_token, sid, sd))) {
+		DEBUG(4,("sam_set_sec_desc for %s in backend %s failed\n", sid_string_static(sid), tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+
+NTSTATUS sam_lookup_name(const SAM_CONTEXT *context, const NT_USER_TOKEN *access_token, const char *domain, const char *name, DOM_SID *sid, uint32 *type)
+{
+	SAM_METHODS	*tmp_methods;
+	NTSTATUS	nt_status;
+
+	DEBUG(5,("sam_lookup_name: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_methods_by_name(context, &tmp_methods, domain))) {
+		DEBUG(4,("sam_get_methods_by_name failed\n"));
+		return nt_status;
+	}
+
+	if (!tmp_methods->sam_lookup_name) {
+		DEBUG(3, ("sam_lookup_name: sam_methods of the domain did not specify sam_lookup_name\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_lookup_name(tmp_methods, access_token, name, sid, type))) {
+		DEBUG(4,("sam_lookup_name for %s\\%s in backend %s failed\n",
+				 tmp_methods->domain_name, name, tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_lookup_sid(const SAM_CONTEXT *context, const NT_USER_TOKEN *access_token, TALLOC_CTX *mem_ctx, const DOM_SID *sid, char **name, uint32 *type)
+{
+	SAM_METHODS	*tmp_methods;
+	uint32		rid;
+	NTSTATUS	nt_status;
+	DOM_SID		domainsid;
+
+	DEBUG(5,("sam_lookup_sid: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	sid_copy(&domainsid, sid);
+	if (!sid_split_rid(&domainsid, &rid)) {
+		DEBUG(3,("sam_lookup_sid: failed to split the sid\n"));
+		return NT_STATUS_INVALID_SID;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_methods_by_sid(context, &tmp_methods, &domainsid))) {
+		DEBUG(4,("sam_get_methods_by_sid failed\n"));
+		return nt_status;
+	}
+
+	if (!tmp_methods->sam_lookup_sid) {
+		DEBUG(3, ("sam_lookup_sid: sam_methods of the domain did not specify sam_lookup_sid\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_lookup_sid(tmp_methods, access_token, mem_ctx, sid, name, type))) {
+		DEBUG(4,("sam_lookup_name for %s in backend %s failed\n",
+				 sid_string_static(sid), tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+
+NTSTATUS sam_update_domain(const SAM_CONTEXT *context, const SAM_DOMAIN_HANDLE *domain)
+{
+	const SAM_METHODS *tmp_methods;
+	NTSTATUS     nt_status;
+
+	DEBUG(5,("sam_update_domain: %d\n", __LINE__));
+	
+	SAM_SETUP_CONTEXT;
+
+	/* invalid domain specified */
+	SAM_ASSERT(domain && domain->current_sam_methods);
+	
+	tmp_methods = domain->current_sam_methods;
+	
+	if (!tmp_methods->sam_update_domain) {
+		DEBUG(3, ("sam_update_domain: sam_methods of the domain did not specify sam_update_domain\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_update_domain(tmp_methods, domain))){
+		DEBUG(4,("sam_update_domain in backend %s failed\n",
+				 tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_enum_domains(const SAM_CONTEXT *context, const NT_USER_TOKEN *access_token, int32 *domain_count, DOM_SID **domains, char ***domain_names)
+{
+	SAM_METHODS	*tmp_methods;
+	NTSTATUS	 nt_status;
+
+	SEC_DESC	*sd;
+	size_t		sd_size;
+	uint32		acc_granted;
+	int		i = 0;
+
+	DEBUG(5,("sam_enum_domains: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	/* invalid parmaters specified */
+	SAM_ASSERT(domain_count && domains && domain_names);
+
+	if (!NT_STATUS_IS_OK(nt_status = samr_make_sam_obj_sd(context->mem_ctx, &sd, &sd_size))) {
+		DEBUG(4,("samr_make_sam_obj_sd failed\n"));
+		return nt_status;
+	}
+
+	if (!se_access_check(sd, access_token, SA_RIGHT_SAM_ENUM_DOMAINS, &acc_granted, &nt_status)) {
+		DEBUG(3,("sam_enum_domains: ACCESS DENIED\n"));
+			return nt_status;
+	}
+
+	tmp_methods= context->methods;
+	*domain_count = 0;
+
+	while (tmp_methods) {
+		(*domain_count)++;
+		tmp_methods= tmp_methods->next;
+	}
+
+	DEBUG(6,("sam_enum_domains: enumerating %d domains\n", (*domain_count)));
+
+	tmp_methods = context->methods;
+
+	if (((*domains) = malloc( sizeof(DOM_SID) * (*domain_count))) == NULL) {
+		DEBUG(0,("sam_enum_domains: Out of memory allocating domain SID list\n"));
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	if (((*domain_names) = malloc( sizeof(char*) * (*domain_count))) == NULL) {
+		DEBUG(0,("sam_enum_domains: Out of memory allocating domain name list\n"));
+		SAFE_FREE((*domains));
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	while (tmp_methods) {
+		DEBUGADD(7,("    [%d] %s: %s\n", i, tmp_methods->domain_name, sid_string_static(&tmp_methods->domain_sid)));
+		sid_copy(domains[i],&tmp_methods->domain_sid);
+		*domain_names[i] = smb_xstrdup(tmp_methods->domain_name);
+		i++;
+		tmp_methods= tmp_methods->next;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_lookup_domain(const SAM_CONTEXT *context, const NT_USER_TOKEN *access_token, const char *domain, DOM_SID **domainsid)
+{
+	SAM_METHODS	*tmp_methods;
+	NTSTATUS	nt_status;
+
+	SEC_DESC	*sd;
+	size_t		sd_size;
+	uint32		acc_granted;
+
+	DEBUG(5,("sam_lookup_domain: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	/* invalid paramters */
+	SAM_ASSERT(access_token && domain && domainsid);
+
+	if (!NT_STATUS_IS_OK(nt_status = samr_make_sam_obj_sd(context->mem_ctx, &sd, &sd_size))) {
+		DEBUG(4,("samr_make_sam_obj_sd failed\n"));
+		return nt_status;
+	}
+
+	if (!se_access_check(sd, access_token, SA_RIGHT_SAM_OPEN_DOMAIN, &acc_granted, &nt_status)) {
+		DEBUG(3,("sam_lookup_domain: ACCESS DENIED\n"));
+			return nt_status;
+	}
+
+	tmp_methods= context->methods;
+
+	while (tmp_methods) {
+		if (strcmp(domain, tmp_methods->domain_name) == 0) {
+			(*domainsid) = (DOM_SID *)malloc(sizeof(DOM_SID));
+			sid_copy((*domainsid), &tmp_methods->domain_sid);
+			return NT_STATUS_OK;
+		}
+		tmp_methods= tmp_methods->next;
+	}
+
+	return NT_STATUS_NO_SUCH_DOMAIN;
+}
+
+
+NTSTATUS sam_get_domain_by_sid(const SAM_CONTEXT *context, const NT_USER_TOKEN *access_token, uint32 access_desired, const DOM_SID *domainsid, SAM_DOMAIN_HANDLE **domain)
+{
+	SAM_METHODS	*tmp_methods;
+	NTSTATUS	nt_status;
+
+	DEBUG(5,("sam_get_domain_by_sid: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	SAM_ASSERT(access_token && domainsid && domain);
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_methods_by_sid(context, &tmp_methods, domainsid))) {
+		DEBUG(4,("sam_get_methods_by_sid failed\n"));
+		return nt_status;
+	}
+
+	if (!tmp_methods->sam_get_domain_handle) {
+		DEBUG(3, ("sam_get_domain_by_sid: sam_methods of the domain did not specify sam_get_domain_handle\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_get_domain_handle(tmp_methods, access_token, access_desired, domain))) {
+		DEBUG(4,("sam_get_domain_handle for %s in backend %s failed\n",
+				 sid_string_static(domainsid), tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_create_account(const SAM_CONTEXT *context, const NT_USER_TOKEN *access_token, uint32 access_desired, const DOM_SID *domainsid, const char *account_name, uint16 acct_ctrl, SAM_ACCOUNT_HANDLE **account)
+{
+	SAM_METHODS	*tmp_methods;
+	NTSTATUS	nt_status;
+
+	DEBUG(5,("sam_create_account: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	/* invalid parmaters */
+	SAM_ASSERT(access_token && domainsid && account_name && account);
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_methods_by_sid(context, &tmp_methods, domainsid))) {
+		DEBUG(4,("sam_get_methods_by_sid failed\n"));
+		return nt_status;
+	}
+
+	if (!tmp_methods->sam_create_account) {
+		DEBUG(3, ("sam_create_account: sam_methods of the domain did not specify sam_create_account\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_create_account(tmp_methods, access_token, access_desired, account_name, acct_ctrl, account))) {
+		DEBUG(4,("sam_create_account in backend %s failed\n",
+				 tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_add_account(const SAM_CONTEXT *context, const SAM_ACCOUNT_HANDLE *account)
+{
+	DOM_SID		domainsid;
+	const DOM_SID		*accountsid;
+	SAM_METHODS	*tmp_methods;
+	uint32		rid;
+	NTSTATUS	nt_status;
+	
+	DEBUG(5,("sam_add_account: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	/* invalid parmaters */
+	SAM_ASSERT(account);
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_account_sid(account, &accountsid))) {
+		DEBUG(0,("Can't get account SID\n"));
+		return nt_status;
+	}
+
+	sid_copy(&domainsid, accountsid);
+	if (!sid_split_rid(&domainsid, &rid)) {
+		DEBUG(3,("sam_get_account_by_sid: failed to split the sid\n"));
+		return NT_STATUS_INVALID_SID;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_methods_by_sid(context, &tmp_methods, &domainsid))) {
+		DEBUG(4,("sam_get_methods_by_sid failed\n"));
+		return nt_status;
+	}
+
+	if (!tmp_methods->sam_add_account) {
+		DEBUG(3, ("sam_add_account: sam_methods of the domain did not specify sam_add_account\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_add_account(tmp_methods, account))){
+		DEBUG(4,("sam_add_account in backend %s failed\n",
+				 tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_update_account(const SAM_CONTEXT *context, const SAM_ACCOUNT_HANDLE *account)
+{
+	const SAM_METHODS *tmp_methods;
+	NTSTATUS     nt_status;
+	
+	DEBUG(5,("sam_update_account: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	/* invalid account specified */
+	SAM_ASSERT(account && account->current_sam_methods);
+	
+	tmp_methods = account->current_sam_methods;
+		
+	if (!tmp_methods->sam_update_account) {
+		DEBUG(3, ("sam_update_account: sam_methods of the domain did not specify sam_update_account\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_update_account(tmp_methods, account))){
+		DEBUG(4,("sam_update_account in backend %s failed\n",
+				 tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_delete_account(const SAM_CONTEXT *context, const SAM_ACCOUNT_HANDLE *account)
+{
+	const SAM_METHODS *tmp_methods;
+	NTSTATUS     nt_status;
+	
+	DEBUG(5,("sam_delete_account: %d\n", __LINE__));
+	
+	SAM_SETUP_CONTEXT;
+
+	/* invalid account specified */
+	SAM_ASSERT(account && account->current_sam_methods);
+	
+	tmp_methods = account->current_sam_methods;
+
+	if (!tmp_methods->sam_delete_account) {
+		DEBUG(3, ("sam_delete_account: sam_methods of the domain did not specify sam_delete_account\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_delete_account(tmp_methods, account))){
+		DEBUG(4,("sam_delete_account in backend %s failed\n",
+				 tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_enum_accounts(const SAM_CONTEXT *context, const NT_USER_TOKEN *access_token, const DOM_SID *domainsid, uint16 acct_ctrl, int32 *account_count, SAM_ACCOUNT_ENUM **accounts)
+{
+	SAM_METHODS	*tmp_methods;
+	NTSTATUS	nt_status;
+
+	DEBUG(5,("sam_enum_accounts: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	SAM_ASSERT(access_token && domainsid && account_count && accounts);
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_methods_by_sid(context, &tmp_methods, domainsid))) {
+		DEBUG(4,("sam_get_methods_by_sid failed\n"));
+		return nt_status;
+	}
+
+	if (!tmp_methods->sam_enum_accounts) {
+		DEBUG(3, ("sam_enum_accounts: sam_methods of the domain did not specify sam_enum_accounts\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_enum_accounts(tmp_methods, access_token, acct_ctrl, account_count, accounts))) {
+		DEBUG(4,("sam_enum_accounts for domain %s in backend %s failed\n",
+				 tmp_methods->domain_name, tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+
+NTSTATUS sam_get_account_by_sid(const SAM_CONTEXT *context, const NT_USER_TOKEN *access_token, uint32 access_desired, const DOM_SID *accountsid, SAM_ACCOUNT_HANDLE **account)
+{
+	SAM_METHODS	*tmp_methods;
+	uint32		rid;
+	DOM_SID		domainsid;
+	NTSTATUS	nt_status;
+
+	DEBUG(5,("sam_get_account_by_sid: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	SAM_ASSERT(access_token && accountsid && account);
+
+	sid_copy(&domainsid, accountsid);
+	if (!sid_split_rid(&domainsid, &rid)) {
+		DEBUG(3,("sam_get_account_by_sid: failed to split the sid\n"));
+		return NT_STATUS_INVALID_SID;
+	}
+
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_methods_by_sid(context, &tmp_methods, &domainsid))) {
+		DEBUG(4,("sam_get_methods_by_sid failed\n"));
+		return nt_status;
+	}
+
+	if (!tmp_methods->sam_get_account_by_sid) {
+		DEBUG(3, ("sam_get_account_by_sid: sam_methods of the domain did not specify sam_get_account_by_sid\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_get_account_by_sid(tmp_methods, access_token, access_desired, accountsid, account))) {
+		DEBUG(4,("sam_get_account_by_sid for %s in backend %s failed\n",
+				 sid_string_static(accountsid), tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_get_account_by_name(const SAM_CONTEXT *context, const NT_USER_TOKEN *access_token, uint32 access_desired, const char *domain, const char *name, SAM_ACCOUNT_HANDLE **account)
+{
+	SAM_METHODS	*tmp_methods;
+	NTSTATUS	nt_status;
+
+	DEBUG(5,("sam_get_account_by_name: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	SAM_ASSERT(access_token && domain && name && account);
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_methods_by_name(context, &tmp_methods, domain))) {
+		DEBUG(4,("sam_get_methods_by_name failed\n"));
+		return nt_status;
+	}
+
+	if (!tmp_methods->sam_get_account_by_name) {
+		DEBUG(3, ("sam_get_account_by_name: sam_methods of the domain did not specify sam_get_account_by_name\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_get_account_by_name(tmp_methods, access_token, access_desired, name, account))) {
+		DEBUG(4,("sam_get_account_by_name for %s\\%s in backend %s failed\n",
+				 domain, name, tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_create_group(const SAM_CONTEXT *context, const NT_USER_TOKEN *access_token, uint32 access_desired, const DOM_SID *domainsid, const char *group_name, uint16 group_ctrl, SAM_GROUP_HANDLE **group)
+{
+	SAM_METHODS	*tmp_methods;
+	NTSTATUS	nt_status;
+
+	DEBUG(5,("sam_create_group: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	SAM_ASSERT(access_token && domainsid && group_name && group);
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_methods_by_sid(context, &tmp_methods, domainsid))) {
+		DEBUG(4,("sam_get_methods_by_sid failed\n"));
+		return nt_status;
+	}
+
+	if (!tmp_methods->sam_create_group) {
+		DEBUG(3, ("sam_create_group: sam_methods of the domain did not specify sam_create_group\n"));
+		return NT_STATUS_UNSUCCESSFUL; 
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_create_group(tmp_methods, access_token, access_desired, group_name, group_ctrl, group))) {
+		DEBUG(4,("sam_create_group in backend %s failed\n",
+				 tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_add_group(const SAM_CONTEXT *context, const SAM_GROUP_HANDLE *group)
+{
+	DOM_SID		domainsid;
+	const DOM_SID		*groupsid;
+	SAM_METHODS	*tmp_methods;
+	uint32		rid;
+	NTSTATUS	nt_status;
+	
+	DEBUG(5,("sam_add_group: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	SAM_ASSERT(group);
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_group_sid(group, &groupsid))) {
+		DEBUG(0,("Can't get group SID\n"));
+		return nt_status;
+	}
+
+	sid_copy(&domainsid, groupsid);
+	if (!sid_split_rid(&domainsid, &rid)) {
+		DEBUG(3,("sam_get_group_by_sid: failed to split the sid\n"));
+		return NT_STATUS_INVALID_SID;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_methods_by_sid(context, &tmp_methods, &domainsid))) {
+		DEBUG(4,("sam_get_methods_by_sid failed\n"));
+		return nt_status;
+	}
+
+	if (!tmp_methods->sam_add_group) {
+		DEBUG(3, ("sam_add_group: sam_methods of the domain did not specify sam_add_group\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_add_group(tmp_methods, group))){
+		DEBUG(4,("sam_add_group in backend %s failed\n",
+				 tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_update_group(const SAM_CONTEXT *context, const SAM_GROUP_HANDLE *group)
+{
+	const SAM_METHODS *tmp_methods;
+	NTSTATUS     nt_status;
+	
+	DEBUG(5,("sam_update_group: %d\n", __LINE__));
+	
+	SAM_SETUP_CONTEXT;
+
+	/* invalid group specified */
+	SAM_ASSERT(group && group->current_sam_methods);
+	
+	tmp_methods = group->current_sam_methods;
+	
+	if (!tmp_methods->sam_update_group) {
+		DEBUG(3, ("sam_update_group: sam_methods of the domain did not specify sam_update_group\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_update_group(tmp_methods, group))){
+		DEBUG(4,("sam_update_group in backend %s failed\n",
+				 tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_delete_group(const SAM_CONTEXT *context, const SAM_GROUP_HANDLE *group)
+{
+	const SAM_METHODS *tmp_methods;
+	NTSTATUS     nt_status;
+	
+	DEBUG(5,("sam_delete_group: %d\n", __LINE__));
+	
+	SAM_SETUP_CONTEXT;
+
+	/* invalid group specified */
+	SAM_ASSERT(group && group->current_sam_methods);
+	
+	tmp_methods = group->current_sam_methods;
+
+	if (!tmp_methods->sam_delete_group) {
+		DEBUG(3, ("sam_delete_group: sam_methods of the domain did not specify sam_delete_group\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_delete_group(tmp_methods, group))){
+		DEBUG(4,("sam_delete_group in backend %s failed\n",
+				 tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_enum_groups(const SAM_CONTEXT *context, const NT_USER_TOKEN *access_token, const DOM_SID *domainsid, uint16 group_ctrl, uint32 *groups_count, SAM_GROUP_ENUM **groups)
+{
+	SAM_METHODS	*tmp_methods;
+	NTSTATUS	nt_status;
+
+	DEBUG(5,("sam_enum_groups: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	SAM_ASSERT(access_token && domainsid && groups_count && groups);
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_methods_by_sid(context, &tmp_methods, domainsid))) {
+		DEBUG(4,("sam_get_methods_by_sid failed\n"));
+		return nt_status;
+	}
+
+	if (!tmp_methods->sam_enum_accounts) {
+		DEBUG(3, ("sam_enum_groups: sam_methods of the domain did not specify sam_enum_groups\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_enum_groups(tmp_methods, access_token, group_ctrl, groups_count, groups))) {
+		DEBUG(4,("sam_enum_groups for domain %s in backend %s failed\n",
+				 tmp_methods->domain_name, tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_get_group_by_sid(const SAM_CONTEXT *context, const NT_USER_TOKEN *access_token, uint32 access_desired, const DOM_SID *groupsid, SAM_GROUP_HANDLE **group)
+{
+	SAM_METHODS	*tmp_methods;
+	uint32		rid;
+	NTSTATUS	nt_status;
+	DOM_SID		domainsid;
+
+	DEBUG(5,("sam_get_group_by_sid: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	SAM_ASSERT(access_token && groupsid && group);
+
+	sid_copy(&domainsid, groupsid);
+	if (!sid_split_rid(&domainsid, &rid)) {
+		DEBUG(3,("sam_get_group_by_sid: failed to split the sid\n"));
+		return NT_STATUS_INVALID_SID;
+	}
+
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_methods_by_sid(context, &tmp_methods, &domainsid))) {
+		DEBUG(4,("sam_get_methods_by_sid failed\n"));
+		return nt_status;
+	}
+
+	if (!tmp_methods->sam_get_group_by_sid) {
+		DEBUG(3, ("sam_get_group_by_sid: sam_methods of the domain did not specify sam_get_group_by_sid\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_get_group_by_sid(tmp_methods, access_token, access_desired, groupsid, group))) {
+		DEBUG(4,("sam_get_group_by_sid for %s in backend %s failed\n",
+				 sid_string_static(groupsid), tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_get_group_by_name(const SAM_CONTEXT *context, const NT_USER_TOKEN *access_token, uint32 access_desired, const char *domain, const char *name, SAM_GROUP_HANDLE **group)
+{
+	SAM_METHODS	*tmp_methods;
+	NTSTATUS	nt_status;
+
+	DEBUG(5,("sam_get_group_by_name: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+
+	SAM_ASSERT(access_token && domain && name && group);
+
+	if (!NT_STATUS_IS_OK(nt_status = sam_get_methods_by_name(context, &tmp_methods, domain))) {
+		DEBUG(4,("sam_get_methods_by_name failed\n"));
+		return nt_status;
+	}
+
+	if (!tmp_methods->sam_get_group_by_name) {
+		DEBUG(3, ("sam_get_group_by_name: sam_methods of the domain did not specify sam_get_group_by_name\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_get_group_by_name(tmp_methods, access_token, access_desired, name, group))) {
+		DEBUG(4,("sam_get_group_by_name for %s\\%s in backend %s failed\n",
+				 domain, name, tmp_methods->backendname));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_add_member_to_group(const SAM_CONTEXT *context, const SAM_GROUP_HANDLE *group, const SAM_GROUP_MEMBER *member)
+{
+	const SAM_METHODS *tmp_methods;
+	NTSTATUS     nt_status;
+	
+	SAM_SETUP_CONTEXT;
+	
+	/* invalid group or member specified */
+	SAM_ASSERT(group && group->current_sam_methods && member);
+	
+	tmp_methods = group->current_sam_methods;
+			
+	if (!tmp_methods->sam_add_member_to_group) {
+		DEBUG(3, ("sam_add_member_to_group: sam_methods of the domain did not specify sam_add_member_to_group\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+	
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_add_member_to_group(tmp_methods, group, member))) {
+		DEBUG(4,("sam_add_member_to_group in backend %s failed\n", tmp_methods->backendname));
+		return nt_status;
+	}
+	
+	return NT_STATUS_OK;	
+	
+}
+
+NTSTATUS sam_delete_member_from_group(const SAM_CONTEXT *context, const SAM_GROUP_HANDLE *group, const SAM_GROUP_MEMBER *member)
+{
+	const SAM_METHODS *tmp_methods;
+	NTSTATUS     nt_status;
+
+	SAM_SETUP_CONTEXT;
+	
+	/* invalid group or member specified */
+	SAM_ASSERT(group && group->current_sam_methods && member);
+	
+	tmp_methods = group->current_sam_methods;
+	
+	if (!tmp_methods->sam_delete_member_from_group) {
+		DEBUG(3, ("sam_delete_member_from_group: sam_methods of the domain did not specify sam_delete_member_from_group\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+	
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_delete_member_from_group(tmp_methods, group, member))) {
+		DEBUG(4,("sam_delete_member_from_group in backend %s failed\n", tmp_methods->backendname));
+		return nt_status;
+	}
+	
+	return NT_STATUS_OK;	
+}
+
+NTSTATUS sam_enum_groupmembers(const SAM_CONTEXT *context, const SAM_GROUP_HANDLE *group, uint32 *members_count, SAM_GROUP_MEMBER **members)
+{
+	const SAM_METHODS *tmp_methods;
+	NTSTATUS     nt_status;
+	
+	SAM_SETUP_CONTEXT;
+	
+	/* invalid group specified */
+	SAM_ASSERT(group && group->current_sam_methods && members_count && members);
+	
+	tmp_methods = group->current_sam_methods;
+
+	if (!tmp_methods->sam_enum_groupmembers) {
+		DEBUG(3, ("sam_enum_groupmembers: sam_methods of the domain did not specify sam_enum_group_members\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+	
+	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_enum_groupmembers(tmp_methods, group, members_count, members))) {
+		DEBUG(4,("sam_enum_groupmembers in backend %s failed\n", tmp_methods->backendname));
+		return nt_status;
+	}
+	
+	return NT_STATUS_OK;	
+}
+
+NTSTATUS sam_get_groups_of_sid(const SAM_CONTEXT *context, const NT_USER_TOKEN *access_token, const DOM_SID **sids, uint16 group_ctrl, uint32 *group_count, SAM_GROUP_ENUM **groups)
+{
+	SAM_METHODS	*tmp_methods;
+	NTSTATUS	nt_status;
+	
+	uint32          tmp_group_count;
+	SAM_GROUP_ENUM *tmp_groups;
+	
+	DEBUG(5,("sam_get_groups_of_sid: %d\n", __LINE__));
+
+	SAM_SETUP_CONTEXT;
+	
+	/* invalid sam_context specified */
+	SAM_ASSERT(access_token && sids && context && context->methods);
+	
+	*group_count = 0;
+	
+	*groups = NULL;
+
+	tmp_methods= context->methods;
+
+	while (tmp_methods) {
+		DEBUG(5,("getting groups from domain \n"));
+		if (!tmp_methods->sam_get_groups_of_sid) {
+			DEBUG(3, ("sam_get_groups_of_sid: sam_methods of domain did not specify sam_get_groups_of_sid\n"));
+			SAFE_FREE(*groups);
+			return NT_STATUS_NOT_IMPLEMENTED;
+		}
+		
+		if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_get_groups_of_sid(tmp_methods, access_token, sids, group_ctrl, &tmp_group_count, &tmp_groups))) {
+			DEBUG(4,("sam_get_groups_of_sid in backend %s failed\n", tmp_methods->backendname));
+			SAFE_FREE(*groups);
+			return nt_status;
+		}
+		
+		*groups = Realloc(*groups, ((*group_count)  + tmp_group_count) * sizeof(SAM_GROUP_ENUM));
+
+		memcpy(&(*groups)[*group_count], tmp_groups, tmp_group_count);		
+		
+		SAFE_FREE(tmp_groups);
+		
+		*group_count += tmp_group_count;
+		
+		tmp_methods = tmp_methods->next;
+	}
+	
+	return NT_STATUS_OK;	
+}
+
+