samba-mirror/source/sam/interface.c

/*
   Unix SMB/CIFS implementation.
   Password and authentication handling
   Copyright (C) Andrew Bartlett			2002
   Copyright (C) Jelmer Vernooij			2002
   Copyright (C) Stefan (metze) Metzmacher	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

/** List of various built-in sam modules */

const struct sam_init_function_entry builtin_sam_init_functions[] = {
	{ NULL, NULL}
};

/* FIXME: wrapper functions : context_* */

/******************************************************************
  context_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
 *******************************************************************/

NTSTATUS sam_get_methods_by_sid(const struct sam_context *context, struct sam_methods **sam_method, const DOM_SID *domainsid)
{
	struct sam_methods *tmp_methods;

	DEBUG(5,("sam_get_methods_by_sid: %d\n", __LINE__));

	if ((!context) || (!context->methods))
	{
		DEBUG(2,("sam_get_methods_by_sid: invalid sam_context specified!\n"));
		return NT_STATUS_INVALID_PARAMETER;
	}

	tmp_methods = context->methods;

	while (tmp_methods)
	{
		if (sid_equal(domainsid, &tmp_methods->domain->private.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;
}

NTSTATUS sam_get_methods_by_name(const struct sam_context *context, struct sam_methods **sam_method, const char *domainname)
{
	struct sam_methods *tmp_methods;

	DEBUG(5,("sam_get_methods_by_name: %d\n", __LINE__));

	if ((!context) || (!context->methods))
	{
		DEBUG(2,("sam_get_methods_by_sid: invalid sam_context specified!\n"));
		return NT_STATUS_INVALID_PARAMETER;
	}

	tmp_methods = context->methods;

	while (tmp_methods)
	{
		if (strcmp(domainname, tmp_methods->domain->private.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;
}

NTSTATUS context_sam_get_sec_desc(const struct sam_context *context, const NT_USER_TOKEN *access_token, const DOM_SID *sid, SEC_DESC **sd)
{
	struct sam_methods *tmp_methods;
//	DOM_SID            *domainsid;
	NTSTATUS            nt_status;

	DEBUG(5,("context_sam_get_sec_desc: %d\n", __LINE__));

	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, ("context_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,("context_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 context_sam_set_sec_desc(const struct sam_context *context, const NT_USER_TOKEN *access_token, const DOM_SID *sid, const SEC_DESC *sd)
{
	struct sam_methods *tmp_methods;
//	DOM_SID            *domainsid;
	NTSTATUS            nt_status;

	DEBUG(5,("context_sam_set_sec_desc: %d\n", __LINE__));

	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, ("context_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,("context_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 context_sam_lookup_name(const struct sam_context *context, const NT_USER_TOKEN *access_token, const char *domain, const char *name, DOM_SID **sid, uint32 *type)
{
	struct sam_methods *tmp_methods;
	NTSTATUS            nt_status;

	DEBUG(5,("context_sam_lookup_name: %d\n", __LINE__));

	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, ("context_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,("context_sam_lookup_name for %s\\%s in backend %s failed\n",
				 tmp_methods->domain->private.name, name, tmp_methods->backendname));
		return nt_status;
	}

	return NT_STATUS_OK;
}

NTSTATUS context_sam_lookup_sid(const struct sam_context *context, const NT_USER_TOKEN *access_token, const DOM_SID *sid, char **name, uint32 *type)
{
	struct sam_methods *tmp_methods;
	uint32             rid;
	NTSTATUS            nt_status;
	DOM_SID				domainsid;

	DEBUG(5,("context_sam_lookup_sid: %d\n", __LINE__));

	sid_copy(&domainsid, sid);
	if (!sid_split_rid(&domainsid, &rid)) {
		DEBUG(3,("context_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, ("context_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, sid, name, type))) {
		DEBUG(4,("context_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 context_sam_update_domain(const struct sam_context *context, const SAM_DOMAIN_HANDLE *domain)
{
	return NT_STATUS_NOT_IMPLEMENTED;
}

NTSTATUS context_sam_enum_domains(const struct sam_context *context, const NT_USER_TOKEN *access_token, int32 *domain_count, DOM_SID **domains, char ***domain_names)
{
	struct sam_methods *tmp_methods;
	NTSTATUS            nt_status;

	SEC_DESC            *sd;
	size_t              sd_size;
	uint32              acc_granted;
	int                 i = 0;

	DEBUG(5,("context_sam_enum_domains: %d\n", __LINE__));

	if ((!context)|| (!context->methods)) {
		DEBUG(2,("context_sam_enum_domains: invalid sam_context specified!\n"));
		return NT_STATUS_INVALID_PARAMETER;
	}

	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, SAMR_ACCESS_ENUM_DOMAINS, &acc_granted, &nt_status)) {
		DEBUG(3,("context_sam_enum_domains: ACCESS DENIED\n"));
			return nt_status;
	}

	tmp_methods= context->methods;

	while (tmp_methods)
	{
		(*domain_count)++;
		tmp_methods= tmp_methods->next;
	}

	DEBUG(6,("context_sam_enum_domains: enumerating %d domains\n", (*domain_count)));

	tmp_methods = context->methods;

	if (((*domains) = malloc( sizeof(DOM_SID) * (*domain_count))) == NULL) {
		DEBUG(0,("context_sam_enum_domains: Out of memory allocating domain list\n"));
		return NT_STATUS_NO_MEMORY;
	}

	if (((*domain_names) = malloc( sizeof(char*) * (*domain_count))) == NULL) {
		DEBUG(0,("context_sam_enum_domains: Out of memory allocating domain list\n"));
		SAFE_FREE((*domains));
		return NT_STATUS_NO_MEMORY;
	}

	while (tmp_methods)
	{

		DEBUGADD(7,("    [%d] %s: %s\n", i, tmp_methods->domain->private.name, sid_string_static(&tmp_methods->domain->private.sid)));
		sid_copy(domains[i],&tmp_methods->domain->private.sid);
		if(asprintf(&(*domain_names[i]),"%s",tmp_methods->domain->private.name) < 0) {
			DEBUG(0,("context_sam_enum_domains: asprintf failed"));
			SAFE_FREE((*domains));
			SAFE_FREE((*domain_names));
			return NT_STATUS_NO_MEMORY;
		}

		i++;
		tmp_methods= tmp_methods->next;

	}

	return NT_STATUS_OK;
}

NTSTATUS context_sam_lookup_domain(const struct sam_context *context, const NT_USER_TOKEN *access_token, const char *domain, DOM_SID **domainsid)
{
	struct sam_methods *tmp_methods;
	NTSTATUS            nt_status;

	SEC_DESC           *sd;
	size_t              sd_size;
	uint32              acc_granted;

	DEBUG(5,("context_sam_lookup_domain: %d\n", __LINE__));

	if ((!context)|| (!context->methods)) {
		DEBUG(2,("context_sam_lookup_domain: invalid sam_context specified!\n"));
		return NT_STATUS_INVALID_PARAMETER;
	}

	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, SAMR_ACCESS_OPEN_DOMAIN, &acc_granted, &nt_status)) {
		DEBUG(3,("context_sam_lookup_domain: ACCESS DENIED\n"));
			return nt_status;
	}

	tmp_methods= context->methods;

	while (tmp_methods)
	{
		if (strcmp(domain, tmp_methods->domain->private.name) == 0) {
			sid_copy((*domainsid), &tmp_methods->domain->private.sid);
			return NT_STATUS_OK;
		}
		tmp_methods= tmp_methods->next;
	}

	return NT_STATUS_NO_SUCH_DOMAIN;
}


NTSTATUS context_sam_get_domain_by_sid(const struct sam_context *context, const NT_USER_TOKEN *access_token, const uint32 access_desired, const DOM_SID *domainsid, SAM_DOMAIN_HANDLE **domain)
{
	struct sam_methods *tmp_methods;
	NTSTATUS            nt_status;

	DEBUG(5,("context_sam_get_domain_by_sid: %d\n", __LINE__));

	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, ("context_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,("context_sam_get_domain_by_sid for %s in backend %s failed\n",
				 sid_string_static(domainsid), tmp_methods->backendname));
		return nt_status;
	}

	return NT_STATUS_OK;
}

NTSTATUS context_sam_create_user(const struct sam_context *context, const NT_USER_TOKEN *access_token, const uint32 access_desired, DOM_SID *domainsid, SAM_USER_HANDLE **user)
{
	struct sam_methods *tmp_methods;
	NTSTATUS            nt_status;

	DEBUG(5,("context_sam_create_user: %d\n", __LINE__));

	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_user) {
		DEBUG(3, ("context_sam_create_user: sam_methods of the domain did not specify sam_create_user\n"));
		return NT_STATUS_NOT_IMPLEMENTED;
	}

	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_create_user(tmp_methods, access_token, access_desired, user))) {
		DEBUG(4,("context_sam_create_user in backend %s failed\n",
				 tmp_methods->backendname));
		return nt_status;
	}

	return NT_STATUS_OK;
}

NTSTATUS context_sam_add_user(const struct sam_context *context, const SAM_USER_HANDLE *user)
{
	DOM_SID		domainsid;
	DOM_SID		*usersid;
	struct sam_methods *tmp_methods;
	uint32		rid;
	NTSTATUS status;

	if (!NT_STATUS_IS_OK(status = sam_get_user_sid(user, &usersid))) {
		DEBUG(0,("Can't get user SID\n"));
		return status;
	}

	sid_copy(&domainsid, usersid);
	if (!sid_split_rid(&domainsid, &rid)) {
		DEBUG(3,("context_sam_get_user_by_sid: failed to split the sid\n"));
		return NT_STATUS_INVALID_SID;
	}

	if (!NT_STATUS_IS_OK(status = sam_get_methods_by_sid(context, &tmp_methods, &domainsid))) {
		DEBUG(4,("sam_get_methods_by_sid failed\n"));
		return status;
	}

	if (!tmp_methods->sam_add_user) {
		DEBUG(3, ("context_sam_add_user: sam_methods of the domain did not specify sam_add_user\n"));
		return NT_STATUS_NOT_IMPLEMENTED;
	}

	if (!NT_STATUS_IS_OK(status = tmp_methods->sam_add_user(tmp_methods, user))){
		DEBUG(4,("context_sam_add_user in backend %s failed\n",
				 tmp_methods->backendname));
		return status;
	}

	return NT_STATUS_OK;
}

NTSTATUS context_sam_update_user(const struct sam_context *context, const SAM_USER_HANDLE *user)
{
	DOM_SID		domainsid;
	struct sam_methods *tmp_methods;
	DOM_SID		*usersid;
	uint32		rid;
	NTSTATUS status;

	if (!NT_STATUS_IS_OK(status = sam_get_user_sid(user, &usersid))) {
		DEBUG(0,("Can't get user SID\n"));
		return status;
	}

	sid_copy(&domainsid, usersid);
	if (!sid_split_rid(&domainsid, &rid)) {
		DEBUG(3,("context_sam_get_user_by_sid: failed to split the sid\n"));
		return NT_STATUS_INVALID_SID;
	}

	if (!NT_STATUS_IS_OK(status = sam_get_methods_by_sid(context, &tmp_methods, &domainsid))) {
		DEBUG(4,("sam_get_methods_by_sid failed\n"));
		return status;
	}
	
	if (!tmp_methods->sam_update_user) {
		DEBUG(3, ("context_sam_update_user: sam_methods of the domain did not specify sam_update_user\n"));
		return NT_STATUS_NOT_IMPLEMENTED;
	}

	if (!NT_STATUS_IS_OK(status = tmp_methods->sam_update_user(tmp_methods, user))){
		DEBUG(4,("context_sam_update_user in backend %s failed\n",
				 tmp_methods->backendname));
		return status;
	}

	return NT_STATUS_OK;
}

NTSTATUS context_sam_delete_user(const struct sam_context *context, SAM_USER_HANDLE *user)
{
	DOM_SID		domainsid;
	struct sam_methods *tmp_methods;
	DOM_SID		*usersid;
	uint32		rid;
	NTSTATUS status;

	if (!NT_STATUS_IS_OK(status = sam_get_user_sid(user, &usersid))) {
		DEBUG(0,("Can't get user SID\n"));
		return status;
	}

	sid_copy(&domainsid, usersid);
	if (!sid_split_rid(&domainsid, &rid)) {
		DEBUG(3,("context_sam_get_user_by_sid: failed to split the sid\n"));
		return NT_STATUS_INVALID_SID;
	}

	if (!NT_STATUS_IS_OK(status = sam_get_methods_by_sid(context, &tmp_methods, &domainsid))) {
		DEBUG(4,("sam_get_methods_by_sid failed\n"));
		return status;
	}

	if (!tmp_methods->sam_delete_user) {
		DEBUG(3, ("context_sam_delete_user: sam_methods of the domain did not specify sam_delete_user\n"));
		return NT_STATUS_NOT_IMPLEMENTED;
	}

	if (!NT_STATUS_IS_OK(status = tmp_methods->sam_delete_user(tmp_methods, user))){
		DEBUG(4,("context_sam_delete_user in backend %s failed\n",
				 tmp_methods->backendname));
		return status;
	}

	return NT_STATUS_OK;
}

NTSTATUS context_sam_enum_users(const struct sam_context *context, const NT_USER_TOKEN *access_token, const DOM_SID *domainsid, int32 *user_count, SAM_USER_ENUM **users)
{
	struct sam_methods *tmp_methods;
	NTSTATUS            nt_status;

	DEBUG(5,("context_sam_enum_users: %d\n", __LINE__));

	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_users) {
		DEBUG(3, ("context_sam_enum_users: sam_methods of the domain did not specify sam_enum_users\n"));
		return NT_STATUS_NOT_IMPLEMENTED;
	}

	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_enum_users(tmp_methods, access_token, user_count, users))) {
		DEBUG(4,("context_sam_enum_users for domain %s in backend %s failed\n",
				 tmp_methods->domain->private.name, tmp_methods->backendname));
		return nt_status;
	}

	return NT_STATUS_OK;
}


NTSTATUS context_sam_get_user_by_sid(const struct sam_context *context, const NT_USER_TOKEN *access_token, const uint32 access_desired, const DOM_SID *usersid, SAM_USER_HANDLE **user)
{
	struct sam_methods *tmp_methods;
	uint32              rid;
	DOM_SID				domainsid;
	NTSTATUS            nt_status;

	DEBUG(5,("context_sam_get_user_by_sid: %d\n", __LINE__));

	sid_copy(&domainsid, usersid);
	if (!sid_split_rid(&domainsid, &rid)) {
		DEBUG(3,("context_sam_get_user_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_user_by_sid) {
		DEBUG(3, ("context_sam_get_user_by_sid: sam_methods of the domain did not specify sam_get_user_by_sid\n"));
		return NT_STATUS_NOT_IMPLEMENTED;
	}

	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_get_user_by_sid(tmp_methods, access_token, access_desired, usersid, user))) {
		DEBUG(4,("context_sam_get_user_by_sid for %s in backend %s failed\n",
				 sid_string_static(usersid), tmp_methods->backendname));
		return nt_status;
	}

	return NT_STATUS_OK;
}

NTSTATUS context_sam_get_user_by_name(const struct sam_context *context, const NT_USER_TOKEN *access_token, const uint32 access_desired, const char *domain, const char *name, SAM_USER_HANDLE **user)
{
	struct sam_methods *tmp_methods;
	NTSTATUS            nt_status;

	DEBUG(5,("context_sam_get_user_by_name: %d\n", __LINE__));

	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_user_by_name) {
		DEBUG(3, ("context_sam_get_user_by_name: sam_methods of the domain did not specify sam_get_user_by_name\n"));
		return NT_STATUS_NOT_IMPLEMENTED;
	}

	if (!NT_STATUS_IS_OK(nt_status = tmp_methods->sam_get_user_by_name(tmp_methods, access_token, access_desired, name, user))) {
		DEBUG(4,("context_sam_get_user_by_name for %s\\%s in backend %s failed\n",
				 domain, name, tmp_methods->backendname));
		return nt_status;
	}

	return NT_STATUS_OK;
}

NTSTATUS context_sam_create_group(const struct sam_context *context, const NT_USER_TOKEN *access_token, const uint32 access_desired, const uint32 type, DOM_SID *sid, SAM_GROUP_HANDLE **group)
{
	struct sam_methods *tmp_methods;
	NTSTATUS            nt_status;

	DEBUG(5,("context_sam_create_group: %d\n", __LINE__));

	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_create_group) {
		DEBUG(3, ("context_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, type, group))) {
		DEBUG(4,("context_sam_create_group in backend %s failed\n",
				 tmp_methods->backendname));
		return nt_status;
	}

	return NT_STATUS_OK;
}

NTSTATUS context_sam_add_group(const struct sam_context *context, const SAM_GROUP_HANDLE *group)
{
	DOM_SID		domainsid;
	DOM_SID		*groupsid;
	struct sam_methods *tmp_methods;
	uint32		rid;
	NTSTATUS status;

	if (!NT_STATUS_IS_OK(status = sam_get_group_sid(group, &groupsid))) {
		DEBUG(0,("Can't get group SID\n"));
		return status;
	}

	sid_copy(&domainsid, groupsid);
	if (!sid_split_rid(&domainsid, &rid)) {
		DEBUG(3,("context_sam_get_group_by_sid: failed to split the sid\n"));
		return NT_STATUS_INVALID_SID;
	}

	if (!NT_STATUS_IS_OK(status = sam_get_methods_by_sid(context, &tmp_methods, &domainsid))) {
		DEBUG(4,("sam_get_methods_by_sid failed\n"));
		return status;
	}

	if (!tmp_methods->sam_add_group) {
		DEBUG(3, ("context_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(status = tmp_methods->sam_add_group(tmp_methods, group))){
		DEBUG(4,("context_sam_add_group in backend %s failed\n",
				 tmp_methods->backendname));
		return status;
	}

	return NT_STATUS_OK;
}

NTSTATUS context_sam_update_group(const struct sam_context *context, const DOM_SID *domainsid, const SAM_GROUP_HANDLE *group)
{
	DOM_SID		domainsid;
	DOM_SID		*groupsid;
	struct sam_methods *tmp_methods;
	uint32		rid;
	NTSTATUS status;

	if (!NT_STATUS_IS_OK(status = sam_get_group_sid(group, &groupsid))) {
		DEBUG(0,("Can't get group SID\n"));
		return status;
	}

	sid_copy(&domainsid, groupsid);
	if (!sid_split_rid(&domainsid, &rid)) {
		DEBUG(3,("context_sam_get_group_by_sid: failed to split the sid\n"));
		return NT_STATUS_INVALID_SID;
	}

	if (!NT_STATUS_IS_OK(status = sam_get_methods_by_sid(context, &tmp_methods, &domainsid))) {
		DEBUG(4,("sam_get_methods_by_sid failed\n"));
		return status;
	}

	if (!tmp_methods->sam_update_group) {
		DEBUG(3, ("context_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(status = tmp_methods->sam_update_group(tmp_methods, group))){
		DEBUG(4,("context_sam_update_group in backend %s failed\n",
				 tmp_methods->backendname));
		return status;
	}

	return NT_STATUS_OK;
}

NTSTATUS context_sam_delete_group(const struct sam_context *context, SAM_GROUP_HANDLE **groupsid)
{
	DOM_SID		domainsid;
	struct sam_methods *tmp_methods;
	DOM_SID		*groupsid;
	uint32		rid;
	NTSTATUS status;

	if (!NT_STATUS_IS_OK(status = sam_get_group_sid(group, &groupsid))) {
		DEBUG(0,("Can't get group SID\n"));
		return status;
	}

	sid_copy(&domainsid, groupsid);
	if (!sid_split_rid(&domainsid, &rid)) {
		DEBUG(3,("context_sam_get_group_by_sid: failed to split the sid\n"));
		return NT_STATUS_INVALID_SID;
	}

	if (!NT_STATUS_IS_OK(status = sam_get_methods_by_sid(context, &tmp_methods, &domainsid))) {
		DEBUG(4,("sam_get_methods_by_sid failed\n"));
		return status;
	}

	if (!tmp_methods->sam_delete_group) {
		DEBUG(3, ("context_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(status = tmp_methods->sam_delete_group(tmp_methods, group))){
		DEBUG(4,("context_sam_delete_group in backend %s failed\n",
				 tmp_methods->backendname));
		return status;
	}

	return NT_STATUS_OK;
}

NTSTATUS context_sam_enum_groups(const struct sam_context *context, const NT_USER_TOKEN *access_token, const DOM_SID *domainsid, const uint32 type, uint32 *groups_count, SAM_GROUP_ENUM **groups)
{
	struct sam_methods *tmp_methods;
	NTSTATUS            nt_status;

	DEBUG(5,("context_sam_enum_groups: %d\n", __LINE__));

	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_users) {
		DEBUG(3, ("context_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, type, groups_count, groups))) {
		DEBUG(4,("context_sam_enum_groups for domain %s in backend %s failed\n",
				 tmp_methods->domain->private.name, tmp_methods->backendname));
		return nt_status;
	}

	return NT_STATUS_OK;
}

NTSTATUS context_sam_get_group_by_sid(const struct sam_context *context, const NT_USER_TOKEN *access_token, const uint32 access_desired, const DOM_SID *groupsid, SAM_GROUP_HANDLE **group)
{
	struct sam_methods *tmp_methods;
	uint32              rid;
	NTSTATUS            nt_status;
	DOM_SID				domainsid;

	DEBUG(5,("context_sam_get_group_by_sid: %d\n", __LINE__));

	sid_copy(&domainsid, groupsid);
	if (!sid_split_rid(&domainsid, &rid)) {
		DEBUG(3,("context_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, ("context_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,("context_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 context_sam_get_group_by_name(const struct sam_context *context, const NT_USER_TOKEN *access_token, const uint32 access_desired, const char *domain, const char *name, SAM_GROUP_HANDLE **group)
{
	struct sam_methods *tmp_methods;
	NTSTATUS            nt_status;

	DEBUG(5,("context_sam_get_group_by_name: %d\n", __LINE__));

	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, ("context_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,("context_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 context_sam_add_member_to_group(const struct sam_context *context, SAM_GROUP_HANDLE *group, SAM_GROUP_MEMBER *member)
{
	return NT_STATUS_NOT_IMPLEMENTED;
}
NTSTATUS context_sam_delete_member_from_group(const struct sam_context *context, SAM_GROUP_HANDLE *group, SAM_GROUP_MEMBER *member)
{
	return NT_STATUS_NOT_IMPLEMENTED;
}

NTSTATUS context_sam_enum_groupmembers(const struct sam_context *context, const SAM_GROUP_HANDLE *group, uint32 *members_count, SAM_GROUP_MEMBER **members)
{
	return NT_STATUS_NOT_IMPLEMENTED;
}

NTSTATUS context_sam_get_groups_of_user(const struct sam_context *context, const SAM_USER_HANDLE *user, const uint32 type, uint32 *group_count, SAM_GROUP_ENUM **groups)
{
	return NT_STATUS_NOT_IMPLEMENTED;
}


/******************************************************************
  Free and cleanup a sam context, any associated data and anything
  that the attached modules might have associated.
 *******************************************************************/

void free_sam_context(struct sam_context **context)
{
	struct 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 sam_methods from scratch
 *******************************************************************/

NTSTATUS make_sam_context_list(struct sam_context **context, char **selected)
{
	int i = 0;
	struct sam_methods *curmethods, *tmpmethods;
	NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;

	if (!NT_STATUS_IS_OK(nt_status = make_sam_context(context))) {
		return nt_status;
	}                                                                           
	while (selected[i]){
		/* Try to initialise sam */
		DEBUG(5,("Trying to load: %s\n", selected[i]));
		if (!NT_STATUS_IS_OK(nt_status = make_sam_methods_name(&curmethods, *context, selected[i]))) {
			DEBUG(1, ("Loading %s failed!\n", selected[i]));
			free_sam_context(context);
			return nt_status;
		}
		curmethods->parent = *context;
		DLIST_ADD_END((*context)->methods, curmethods, tmpmethods);
		i++;
																	    }
    return NT_STATUS_OK;
}

NTSTATUS make_sam_methods_name(struct sam_methods **methods, struct sam_context *context, const char *selected)
{
	char *module_name = smb_xstrdup(selected);
	char *module_location = NULL, *p;
	NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
	int i;

	p = strchr(module_name, ':');

	if (p) {
		*p = 0;
		module_location = p+1;
		trim_string(module_location, " ", " ");
	}

	trim_string(module_name, " ", " ");

	DEBUG(5,("Attempting to find an sam backend to match %s (%s)\n", selected, module_name));
	for (i = 0; builtin_sam_init_functions[i].name; i++)
	{
		if (strequal(builtin_sam_init_functions[i].name, module_name))
		{
			DEBUG(5,("Found sam backend %s (at pos %d)\n", module_name, i));
			nt_status = builtin_sam_init_functions[i].init(context, methods, module_location);
			if (NT_STATUS_IS_OK(nt_status)) {
				DEBUG(5,("sam backend %s has a valid init\n", selected));
			} else {
				DEBUG(0,("sam backend %s did not correctly init (error was %s)\n", selected, nt_errstr(nt_status)));
			}
			SAFE_FREE(module_name);
			return nt_status;
			break; /* unreached */
		}
	}

	/* No such backend found */
	SAFE_FREE(module_name);
	return NT_STATUS_INVALID_PARAMETER;
}

/******************************************************************
  Make a sam_context from scratch.
 *******************************************************************/

NTSTATUS make_sam_context(struct sam_context **context) 
{
	TALLOC_CTX *mem_ctx;

	mem_ctx = talloc_init_named("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;

	/* FIXME */

	(*context)->free_fn = free_sam_context;

	return NT_STATUS_OK;
}


/******************************************************************
  Return an already initialised sam_context, to facilitate backward 
  compatibility (see functions below).
 *******************************************************************/

struct sam_context *sam_get_static_context(BOOL reload) 
{
	static struct sam_context *sam_context = NULL;

	if ((sam_context) && (reload)) {
		sam_context->free_fn(&sam_context);
		if (!NT_STATUS_IS_OK(make_sam_context_list(&sam_context, lp_sam_backend()))) {
			return NULL;
		}
	}

	if (!sam_context) {
		if (!NT_STATUS_IS_OK(make_sam_context_list(&sam_context, lp_sam_backend()))) {
			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);
}


NTSTATUS make_sam_methods(TALLOC_CTX *mem_ctx, SAM_METHODS **methods) 
{
	*methods = talloc(mem_ctx, sizeof(struct sam_methods));

	if (!*methods) {
		return NT_STATUS_NO_MEMORY;
	}

	ZERO_STRUCTP(*methods);

	return NT_STATUS_OK;
}