/*
 *  Unix SMB/CIFS implementation.
 *  NetApi User Support
 *  Copyright (C) Guenther Deschner 2008
 *
 *  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 3 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, see <http://www.gnu.org/licenses/>.
 */

#include "includes.h"

#include "librpc/gen_ndr/libnetapi.h"
#include "lib/netapi/netapi.h"
#include "lib/netapi/netapi_private.h"
#include "lib/netapi/libnetapi.h"

/****************************************************************
****************************************************************/

static void convert_USER_INFO_1_to_samr_user_info25(struct USER_INFO_1 *info1,
						    DATA_BLOB *user_session_key,
						    struct samr_UserInfo25 *info25)
{
	uint32_t fields_present = SAMR_FIELD_ACCT_FLAGS;
	struct samr_LogonHours zero_logon_hours;
	struct lsa_BinaryString zero_parameters;
	uint32_t acct_flags = 0;
	NTTIME password_age;

	ZERO_STRUCTP(info25);
	ZERO_STRUCT(zero_logon_hours);
	ZERO_STRUCT(zero_parameters);

	if (info1->usri1_name) {
		fields_present |= SAMR_FIELD_FULL_NAME;
	}
	if (info1->usri1_password) {
		fields_present |= SAMR_FIELD_PASSWORD;
	}
	if (info1->usri1_flags) {
		fields_present |= SAMR_FIELD_ACCT_FLAGS;
	}
	if (info1->usri1_name) {
		fields_present |= SAMR_FIELD_FULL_NAME;
	}
	if (info1->usri1_home_dir) {
		fields_present |= SAMR_FIELD_HOME_DIRECTORY;
	}
	if (info1->usri1_script_path) {
		fields_present |= SAMR_FIELD_LOGON_SCRIPT;
	}
	if (info1->usri1_comment) {
		fields_present |= SAMR_FIELD_DESCRIPTION;
	}
	if (info1->usri1_password_age) {
		fields_present |= SAMR_FIELD_FORCE_PWD_CHANGE;
	}

	acct_flags |= info1->usri1_flags | ACB_NORMAL;

	unix_to_nt_time_abs(&password_age, info1->usri1_password_age);

	/* TODO: info1->usri1_priv */
	init_samr_user_info21(&info25->info,
			      0,
			      0,
			      0,
			      0,
			      0,
			      password_age,
			      NULL,
			      info1->usri1_name,
			      info1->usri1_home_dir,
			      NULL,
			      info1->usri1_script_path,
			      NULL,
			      info1->usri1_comment,
			      NULL,
			      NULL,
			      &zero_parameters,
			      0,
			      0,
			      acct_flags,
			      fields_present,
			      zero_logon_hours,
			      0,
			      0,
			      0,
			      0,
			      0,
			      0,
			      0);

	if (info1->usri1_password) {
		uchar pwbuf[532];
		struct MD5Context ctx;
		uint8_t confounder[16];
		DATA_BLOB confounded_session_key = data_blob(NULL, 16);

		encode_pw_buffer(pwbuf, info1->usri1_password, STR_UNICODE);

		generate_random_buffer((uint8_t *)confounder, 16);

		MD5Init(&ctx);
		MD5Update(&ctx, confounder, 16);
		MD5Update(&ctx, user_session_key->data,
				user_session_key->length);
		MD5Final(confounded_session_key.data, &ctx);

		SamOEMhashBlob(pwbuf, 516, &confounded_session_key);
		memcpy(&pwbuf[516], confounder, 16);

		memcpy(info25->password.data, pwbuf, sizeof(pwbuf));
		data_blob_free(&confounded_session_key);
	}
}

/****************************************************************
****************************************************************/

WERROR NetUserAdd_r(struct libnetapi_ctx *ctx,
		    struct NetUserAdd *r)
{
	struct cli_state *cli = NULL;
	struct rpc_pipe_client *pipe_cli = NULL;
	NTSTATUS status;
	WERROR werr;
	POLICY_HND connect_handle, domain_handle, user_handle;
	struct lsa_String lsa_account_name;
	struct dom_sid2 *domain_sid = NULL;
	struct samr_UserInfo25 info25;
	union samr_UserInfo *user_info = NULL;
	struct samr_PwInfo pw_info;
	uint32_t access_granted = 0;
	uint32_t rid = 0;
	struct USER_INFO_1 *info1;

	ZERO_STRUCT(connect_handle);
	ZERO_STRUCT(domain_handle);
	ZERO_STRUCT(user_handle);

	if (!r->in.buffer) {
		return WERR_INVALID_PARAM;
	}

	switch (r->in.level) {
		case 1:
			info1 = (struct USER_INFO_1 *)r->in.buffer;
			break;
		case 2:
		case 3:
		case 4:
		default:
			werr = WERR_NOT_SUPPORTED;
			goto done;
	}

	werr = libnetapi_open_ipc_connection(ctx, r->in.server_name, &cli);
	if (!W_ERROR_IS_OK(werr)) {
		goto done;
	}

	werr = libnetapi_open_pipe(ctx, cli, PI_SAMR, &pipe_cli);
	if (!W_ERROR_IS_OK(werr)) {
		goto done;
	}

	werr = libnetapi_samr_open_domain(ctx, pipe_cli,
					  SAMR_ACCESS_ENUM_DOMAINS |
					  SAMR_ACCESS_OPEN_DOMAIN,
					  SAMR_DOMAIN_ACCESS_LOOKUP_INFO_1 |
					  SAMR_DOMAIN_ACCESS_CREATE_USER |
					  SAMR_DOMAIN_ACCESS_OPEN_ACCOUNT,
					  &connect_handle,
					  &domain_handle,
					  &domain_sid);
	if (!W_ERROR_IS_OK(werr)) {
		goto done;
	}

	init_lsa_String(&lsa_account_name, info1->usri1_name);

	status = rpccli_samr_CreateUser2(pipe_cli, ctx,
					 &domain_handle,
					 &lsa_account_name,
					 ACB_NORMAL,
					 SEC_STD_WRITE_DAC |
					 SEC_STD_DELETE |
					 SAMR_USER_ACCESS_SET_PASSWORD |
					 SAMR_USER_ACCESS_SET_ATTRIBUTES |
					 SAMR_USER_ACCESS_GET_ATTRIBUTES,
					 &user_handle,
					 &access_granted,
					 &rid);
	if (!NT_STATUS_IS_OK(status)) {
		werr = ntstatus_to_werror(status);
		goto done;
	}

	status = rpccli_samr_QueryUserInfo(pipe_cli, ctx,
					   &user_handle,
					   16,
					   &user_info);
	if (!NT_STATUS_IS_OK(status)) {
		werr = ntstatus_to_werror(status);
		goto done;
	}

	if (!(user_info->info16.acct_flags & ACB_NORMAL)) {
		werr = WERR_INVALID_PARAM;
		goto done;
	}

	status = rpccli_samr_GetUserPwInfo(pipe_cli, ctx,
					   &user_handle,
					   &pw_info);
	if (!NT_STATUS_IS_OK(status)) {
		werr = ntstatus_to_werror(status);
		goto done;
	}

	ZERO_STRUCTP(user_info);

	convert_USER_INFO_1_to_samr_user_info25(info1,
						&cli->user_session_key,
						&info25);

	if (info1->usri1_password) {
		user_info->info25 = info25;
		status = rpccli_samr_SetUserInfo2(pipe_cli, ctx,
						  &user_handle,
						  25,
						  user_info);

		if (NT_STATUS_EQUAL(status, NT_STATUS(DCERPC_FAULT_INVALID_TAG))) {

			user_info->info23.info = info25.info;

			encode_pw_buffer(user_info->info23.password.data,
					 info1->usri1_password, STR_UNICODE);
			SamOEMhashBlob(user_info->info23.password.data, 516,
				       &cli->user_session_key);

			status = rpccli_samr_SetUserInfo2(pipe_cli, ctx,
							  &user_handle,
							  23,
							  user_info);
		}
	} else {
		user_info->info21 = info25.info;
		status = rpccli_samr_SetUserInfo(pipe_cli, ctx,
						 &user_handle,
						 21,
						 user_info);

	}
	if (!NT_STATUS_IS_OK(status)) {
		werr = ntstatus_to_werror(status);
		goto failed;
	}

	werr = WERR_OK;
	goto done;

 failed:
	rpccli_samr_DeleteUser(pipe_cli, ctx,
			       &user_handle);

 done:
	if (!cli) {
		return werr;
	}

	if (is_valid_policy_hnd(&user_handle)) {
		rpccli_samr_Close(pipe_cli, ctx, &user_handle);
	}
	if (is_valid_policy_hnd(&domain_handle)) {
		rpccli_samr_Close(pipe_cli, ctx, &domain_handle);
	}
	if (is_valid_policy_hnd(&connect_handle)) {
		rpccli_samr_Close(pipe_cli, ctx, &connect_handle);
	}

	return werr;
}

/****************************************************************
****************************************************************/

WERROR NetUserAdd_l(struct libnetapi_ctx *ctx,
		    struct NetUserAdd *r)
{
	/* for now just talk to local RPC server */
	if (!r->in.server_name) {
		r->in.server_name = "localhost";
	}

	return NetUserAdd_r(ctx, r);
}

/****************************************************************
****************************************************************/

WERROR NetUserDel_r(struct libnetapi_ctx *ctx,
		    struct NetUserDel *r)
{
	struct cli_state *cli = NULL;
	struct rpc_pipe_client *pipe_cli = NULL;
	NTSTATUS status;
	WERROR werr;
	POLICY_HND connect_handle, builtin_handle, domain_handle, user_handle;
	struct lsa_String lsa_account_name;
	struct samr_Ids user_rids, name_types;
	struct dom_sid2 *domain_sid = NULL;
	struct dom_sid2 user_sid;

	ZERO_STRUCT(connect_handle);
	ZERO_STRUCT(builtin_handle);
	ZERO_STRUCT(domain_handle);
	ZERO_STRUCT(user_handle);

	werr = libnetapi_open_ipc_connection(ctx, r->in.server_name, &cli);
	if (!W_ERROR_IS_OK(werr)) {
		goto done;
	}

	werr = libnetapi_open_pipe(ctx, cli, PI_SAMR, &pipe_cli);
	if (!W_ERROR_IS_OK(werr)) {
		goto done;
	}

	werr = libnetapi_samr_open_domain(ctx, pipe_cli,
					  SAMR_ACCESS_ENUM_DOMAINS |
					  SAMR_ACCESS_OPEN_DOMAIN,
					  SAMR_DOMAIN_ACCESS_OPEN_ACCOUNT,
					  &connect_handle,
					  &domain_handle,
					  &domain_sid);
	if (!W_ERROR_IS_OK(werr)) {
		goto done;
	}

	status = rpccli_samr_OpenDomain(pipe_cli, ctx,
					&connect_handle,
					SAMR_DOMAIN_ACCESS_OPEN_ACCOUNT,
					CONST_DISCARD(DOM_SID *, &global_sid_Builtin),
					&builtin_handle);
	if (!NT_STATUS_IS_OK(status)) {
		werr = ntstatus_to_werror(status);
		goto done;
	}

	init_lsa_String(&lsa_account_name, r->in.user_name);

	status = rpccli_samr_LookupNames(pipe_cli, ctx,
					 &domain_handle,
					 1,
					 &lsa_account_name,
					 &user_rids,
					 &name_types);
	if (!NT_STATUS_IS_OK(status)) {
		werr = ntstatus_to_werror(status);
		goto done;
	}

	status = rpccli_samr_OpenUser(pipe_cli, ctx,
				      &domain_handle,
				      STD_RIGHT_DELETE_ACCESS,
				      user_rids.ids[0],
				      &user_handle);
	if (!NT_STATUS_IS_OK(status)) {
		werr = ntstatus_to_werror(status);
		goto done;
	}

	sid_compose(&user_sid, domain_sid, user_rids.ids[0]);

	status = rpccli_samr_RemoveMemberFromForeignDomain(pipe_cli, ctx,
							   &builtin_handle,
							   &user_sid);
	if (!NT_STATUS_IS_OK(status)) {
		werr = ntstatus_to_werror(status);
		goto done;
	}

	status = rpccli_samr_DeleteUser(pipe_cli, ctx,
					&user_handle);
	if (!NT_STATUS_IS_OK(status)) {
		werr = ntstatus_to_werror(status);
		goto done;
	}

	werr = WERR_OK;

 done:
	if (!cli) {
		return werr;
	}

	if (is_valid_policy_hnd(&user_handle)) {
		rpccli_samr_Close(pipe_cli, ctx, &user_handle);
	}
	if (is_valid_policy_hnd(&builtin_handle)) {
		rpccli_samr_Close(pipe_cli, ctx, &builtin_handle);
	}
	if (is_valid_policy_hnd(&domain_handle)) {
		rpccli_samr_Close(pipe_cli, ctx, &domain_handle);
	}
	if (is_valid_policy_hnd(&connect_handle)) {
		rpccli_samr_Close(pipe_cli, ctx, &connect_handle);
	}

	return werr;
}

/****************************************************************
****************************************************************/

WERROR NetUserDel_l(struct libnetapi_ctx *ctx,
		    struct NetUserDel *r)
{
	/* for now just talk to local RPC server */
	if (!r->in.server_name) {
		r->in.server_name = "localhost";
	}

	return NetUserDel_r(ctx, r);
}

/****************************************************************
****************************************************************/

static NTSTATUS libnetapi_samr_lookup_user(TALLOC_CTX *mem_ctx,
					   struct rpc_pipe_client *pipe_cli,
					   struct policy_handle *domain_handle,
					   struct policy_handle *builtin_handle,
					   const char *user_name,
					   uint32_t rid,
					   uint32_t level,
					   struct samr_UserInfo21 **info21,
					   struct sec_desc_buf **sec_desc)
{
	NTSTATUS status;

	struct policy_handle user_handle;
	union samr_UserInfo *user_info = NULL;
	struct samr_RidWithAttributeArray *rid_array = NULL;
	uint32_t access_mask = SEC_STD_READ_CONTROL |
			       SAMR_USER_ACCESS_GET_ATTRIBUTES |
			       SAMR_USER_ACCESS_GET_NAME_ETC;

	ZERO_STRUCT(user_handle);

	switch (level) {
		case 0:
		case 1:
		case 2:
		case 3:
		case 10:
		case 11:
		case 20:
		case 23:
			break;
		default:
			return NT_STATUS_INVALID_LEVEL;
	}

	if (level == 0) {
		return NT_STATUS_OK;
	}

	status = rpccli_samr_OpenUser(pipe_cli, mem_ctx,
				      domain_handle,
				      access_mask,
				      rid,
				      &user_handle);
	if (!NT_STATUS_IS_OK(status)) {
		goto done;
	}

	status = rpccli_samr_QueryUserInfo(pipe_cli, mem_ctx,
					   &user_handle,
					   21,
					   &user_info);
	if (!NT_STATUS_IS_OK(status)) {
		goto done;
	}

	status = rpccli_samr_QuerySecurity(pipe_cli, mem_ctx,
					   &user_handle,
					   SECINFO_DACL,
					   sec_desc);
	if (!NT_STATUS_IS_OK(status)) {
		goto done;
	}

	if (level == 1) {
		status = rpccli_samr_GetGroupsForUser(pipe_cli, mem_ctx,
						      &user_handle,
						      &rid_array);
		if (!NT_STATUS_IS_OK(status)) {
			goto done;
		}

#if 0
		status = rpccli_samr_GetAliasMembership(pipe_cli, ctx,
							&builtin_handle,
							&sids,
							&rids);
		if (!NT_STATUS_IS_OK(status)) {
			goto done;
		}
#endif
	}

	*info21 = &user_info->info21;

 done:
	if (is_valid_policy_hnd(&user_handle)) {
		rpccli_samr_Close(pipe_cli, mem_ctx, &user_handle);
	}

	return status;
}

/****************************************************************
****************************************************************/

static NTSTATUS libnetapi_samr_lookup_user_map_USER_INFO(TALLOC_CTX *mem_ctx,
							 struct rpc_pipe_client *pipe_cli,
							 struct dom_sid *domain_sid,
							 struct policy_handle *domain_handle,
							 struct policy_handle *builtin_handle,
							 const char *user_name,
							 uint32_t rid,
							 uint32_t level,
							 uint8_t **buffer,
							 uint32_t *num_entries)
{
	NTSTATUS status;

	struct samr_UserInfo21 *info21 = NULL;
	struct sec_desc_buf *sec_desc = NULL;
	struct dom_sid sid;

	struct USER_INFO_0 *info0 = NULL;
	struct USER_INFO_10 *info10 = NULL;
	struct USER_INFO_20 *info20 = NULL;
	struct USER_INFO_23 *info23 = NULL;

	switch (level) {
		case 0:
		case 1:
		case 2:
		case 3:
		case 10:
		case 11:
		case 20:
		case 23:
			break;
		default:
			return NT_STATUS_INVALID_LEVEL;
	}

	if (level == 0) {
		info0 = TALLOC_P(mem_ctx, struct USER_INFO_0);
		NT_STATUS_HAVE_NO_MEMORY(info0);

		info0->usri0_name = talloc_strdup(mem_ctx, user_name);
		NT_STATUS_HAVE_NO_MEMORY(info0->usri0_name);

		ADD_TO_ARRAY(mem_ctx, struct USER_INFO_0, *info0,
			     (struct USER_INFO_0 **)buffer, num_entries);

		return NT_STATUS_OK;
	}

	status = libnetapi_samr_lookup_user(mem_ctx, pipe_cli,
					    domain_handle,
					    builtin_handle,
					    user_name,
					    rid,
					    level,
					    &info21,
					    &sec_desc);

	if (!NT_STATUS_IS_OK(status)) {
		goto done;
	}

	switch (level) {
		case 10:
			info10 = TALLOC_P(mem_ctx, struct USER_INFO_10);
			NT_STATUS_HAVE_NO_MEMORY(info10);

			info10->usri10_name = talloc_strdup(mem_ctx, user_name);
			NT_STATUS_HAVE_NO_MEMORY(info10->usri10_name);

			info10->usri10_comment = talloc_strdup(mem_ctx,
				info21->description.string);

			info10->usri10_full_name = talloc_strdup(mem_ctx,
				info21->full_name.string);

			info10->usri10_usr_comment = talloc_strdup(mem_ctx,
				info21->comment.string);

			ADD_TO_ARRAY(mem_ctx, struct USER_INFO_10, *info10,
				     (struct USER_INFO_10 **)buffer, num_entries);

			break;

		case 20:
			info20 = TALLOC_P(mem_ctx, struct USER_INFO_20);
			NT_STATUS_HAVE_NO_MEMORY(info20);

			info20->usri20_name = talloc_strdup(mem_ctx, user_name);
			NT_STATUS_HAVE_NO_MEMORY(info20->usri20_name);

			info20->usri20_comment = talloc_strdup(mem_ctx,
				info21->description.string);

			info20->usri20_flags = info21->acct_flags;
			info20->usri20_user_id = rid;

			ADD_TO_ARRAY(mem_ctx, struct USER_INFO_20, *info20,
				     (struct USER_INFO_20 **)buffer, num_entries);

			break;
		case 23:
			info23 = TALLOC_P(mem_ctx, struct USER_INFO_23);
			NT_STATUS_HAVE_NO_MEMORY(info23);

			info23->usri23_name = talloc_strdup(mem_ctx, user_name);
			NT_STATUS_HAVE_NO_MEMORY(info23->usri23_name);

			info23->usri23_comment = talloc_strdup(mem_ctx,
				info21->description.string);

			info23->usri23_flags = info21->acct_flags;

			if (!sid_compose(&sid, domain_sid, rid)) {
				return NT_STATUS_NO_MEMORY;
			}

			info23->usri23_user_sid =
				(struct domsid *)sid_dup_talloc(mem_ctx, &sid);

			ADD_TO_ARRAY(mem_ctx, struct USER_INFO_23, *info23,
				     (struct USER_INFO_23 **)buffer, num_entries);
			break;
	}

 done:
	return status;
}

/****************************************************************
****************************************************************/

WERROR NetUserEnum_r(struct libnetapi_ctx *ctx,
		     struct NetUserEnum *r)
{
	struct cli_state *cli = NULL;
	struct rpc_pipe_client *pipe_cli = NULL;
	struct policy_handle connect_handle;
	struct dom_sid2 *domain_sid = NULL;
	struct policy_handle domain_handle;
	struct samr_SamArray *sam = NULL;
	uint32_t filter = ACB_NORMAL;
	int i;
	uint32_t entries_read = 0;

	NTSTATUS status = NT_STATUS_OK;
	WERROR werr;

	ZERO_STRUCT(connect_handle);
	ZERO_STRUCT(domain_handle);

	if (!r->out.buffer) {
		return WERR_INVALID_PARAM;
	}

	*r->out.buffer = NULL;
	*r->out.entries_read = 0;

	switch (r->in.level) {
		case 0:
		case 10:
		case 20:
		case 23:
			break;
		case 1:
		case 2:
		case 3:
		case 11:
		default:
			return WERR_NOT_SUPPORTED;
	}

	werr = libnetapi_open_ipc_connection(ctx, r->in.server_name, &cli);
	if (!W_ERROR_IS_OK(werr)) {
		goto done;
	}

	werr = libnetapi_open_pipe(ctx, cli, PI_SAMR, &pipe_cli);
	if (!W_ERROR_IS_OK(werr)) {
		goto done;
	}

	werr = libnetapi_samr_open_domain(ctx, pipe_cli,
					  SAMR_ACCESS_ENUM_DOMAINS |
					  SAMR_ACCESS_OPEN_DOMAIN,
					  SAMR_DOMAIN_ACCESS_LOOKUP_INFO_2 |
					  SAMR_DOMAIN_ACCESS_ENUM_ACCOUNTS |
					  SAMR_DOMAIN_ACCESS_OPEN_ACCOUNT,
					  &connect_handle,
					  &domain_handle,
					  &domain_sid);
	if (!W_ERROR_IS_OK(werr)) {
		goto done;
	}

	switch (r->in.filter) {
		case FILTER_NORMAL_ACCOUNT:
			filter = ACB_NORMAL;
			break;
		case FILTER_TEMP_DUPLICATE_ACCOUNT:
			filter = ACB_TEMPDUP;
			break;
		case FILTER_INTERDOMAIN_TRUST_ACCOUNT:
			filter = ACB_DOMTRUST;
			break;
		case FILTER_WORKSTATION_TRUST_ACCOUNT:
			filter = ACB_WSTRUST;
			break;
		case FILTER_SERVER_TRUST_ACCOUNT:
			filter = ACB_SVRTRUST;
			break;
		default:
			break;
	}

	status = rpccli_samr_EnumDomainUsers(pipe_cli,
					     ctx,
					     &domain_handle,
					     r->in.resume_handle,
					     filter,
					     &sam,
					     r->in.prefmaxlen,
					     &entries_read);
	werr = ntstatus_to_werror(status);
	if (NT_STATUS_IS_ERR(status)) {
		goto done;
	}

	for (i=0; i < sam->count; i++) {

		status = libnetapi_samr_lookup_user_map_USER_INFO(ctx, pipe_cli,
								  domain_sid,
								  &domain_handle,
								  NULL, /*&builtin_handle, */
								  sam->entries[i].name.string,
								  sam->entries[i].idx,
								  r->in.level,
								  r->out.buffer,
								  r->out.entries_read);
		if (!NT_STATUS_IS_OK(status)) {
			werr = ntstatus_to_werror(status);
			goto done;
		}
	}

 done:
	if (!cli) {
		return werr;
	}

	if (is_valid_policy_hnd(&domain_handle)) {
		rpccli_samr_Close(pipe_cli, ctx, &domain_handle);
	}
	if (is_valid_policy_hnd(&connect_handle)) {
		rpccli_samr_Close(pipe_cli, ctx, &connect_handle);
	}

	return werr;
}

/****************************************************************
****************************************************************/

WERROR NetUserEnum_l(struct libnetapi_ctx *ctx,
		     struct NetUserEnum *r)
{
	return WERR_NOT_SUPPORTED;
}

/****************************************************************
****************************************************************/

static WERROR convert_samr_dispinfo_to_NET_DISPLAY_USER(TALLOC_CTX *mem_ctx,
							struct samr_DispInfoGeneral *info,
							uint32_t *entries_read,
							void **buffer)
{
	struct NET_DISPLAY_USER *user = NULL;
	int i;

	user = TALLOC_ZERO_ARRAY(mem_ctx,
				 struct NET_DISPLAY_USER,
				 info->count);
	W_ERROR_HAVE_NO_MEMORY(user);

	for (i = 0; i < info->count; i++) {
		user[i].usri1_name = talloc_strdup(mem_ctx,
			info->entries[i].account_name.string);
		user[i].usri1_comment = talloc_strdup(mem_ctx,
			info->entries[i].description.string);
		user[i].usri1_flags =
			info->entries[i].acct_flags;
		user[i].usri1_full_name = talloc_strdup(mem_ctx,
			info->entries[i].full_name.string);
		user[i].usri1_user_id =
			info->entries[i].rid;
		user[i].usri1_next_index =
			info->entries[i].idx;

		if (!user[i].usri1_name) {
			return WERR_NOMEM;
		}
	}

	*buffer = talloc_memdup(mem_ctx, user,
		sizeof(struct NET_DISPLAY_USER) * info->count);
	W_ERROR_HAVE_NO_MEMORY(*buffer);

	*entries_read = info->count;

	return WERR_OK;
}

/****************************************************************
****************************************************************/

static WERROR convert_samr_dispinfo_to_NET_DISPLAY_MACHINE(TALLOC_CTX *mem_ctx,
							   struct samr_DispInfoFull *info,
							   uint32_t *entries_read,
							   void **buffer)
{
	struct NET_DISPLAY_MACHINE *machine = NULL;
	int i;

	machine = TALLOC_ZERO_ARRAY(mem_ctx,
				    struct NET_DISPLAY_MACHINE,
				    info->count);
	W_ERROR_HAVE_NO_MEMORY(machine);

	for (i = 0; i < info->count; i++) {
		machine[i].usri2_name = talloc_strdup(mem_ctx,
			info->entries[i].account_name.string);
		machine[i].usri2_comment = talloc_strdup(mem_ctx,
			info->entries[i].description.string);
		machine[i].usri2_flags =
			info->entries[i].acct_flags;
		machine[i].usri2_user_id =
			info->entries[i].rid;
		machine[i].usri2_next_index =
			info->entries[i].idx;

		if (!machine[i].usri2_name) {
			return WERR_NOMEM;
		}
	}

	*buffer = talloc_memdup(mem_ctx, machine,
		sizeof(struct NET_DISPLAY_MACHINE) * info->count);
	W_ERROR_HAVE_NO_MEMORY(*buffer);

	*entries_read = info->count;

	return WERR_OK;
}

/****************************************************************
****************************************************************/

static WERROR convert_samr_dispinfo_to_NET_DISPLAY_GROUP(TALLOC_CTX *mem_ctx,
							 struct samr_DispInfoFullGroups *info,
							 uint32_t *entries_read,
							 void **buffer)
{
	struct NET_DISPLAY_GROUP *group = NULL;
	int i;

	group = TALLOC_ZERO_ARRAY(mem_ctx,
				  struct NET_DISPLAY_GROUP,
				  info->count);
	W_ERROR_HAVE_NO_MEMORY(group);

	for (i = 0; i < info->count; i++) {
		group[i].grpi3_name = talloc_strdup(mem_ctx,
			info->entries[i].account_name.string);
		group[i].grpi3_comment = talloc_strdup(mem_ctx,
			info->entries[i].description.string);
		group[i].grpi3_group_id =
			info->entries[i].rid;
		group[i].grpi3_attributes =
			info->entries[i].acct_flags;
		group[i].grpi3_next_index =
			info->entries[i].idx;

		if (!group[i].grpi3_name) {
			return WERR_NOMEM;
		}
	}

	*buffer = talloc_memdup(mem_ctx, group,
		sizeof(struct NET_DISPLAY_GROUP) * info->count);
	W_ERROR_HAVE_NO_MEMORY(*buffer);

	*entries_read = info->count;

	return WERR_OK;

}

/****************************************************************
****************************************************************/

static WERROR convert_samr_dispinfo_to_NET_DISPLAY(TALLOC_CTX *mem_ctx,
						   union samr_DispInfo *info,
						   uint32_t level,
						   uint32_t *entries_read,
						   void **buffer)
{
	switch (level) {
		case 1:
			return convert_samr_dispinfo_to_NET_DISPLAY_USER(mem_ctx,
									 &info->info1,
									 entries_read,
									 buffer);
		case 2:
			return convert_samr_dispinfo_to_NET_DISPLAY_MACHINE(mem_ctx,
									    &info->info2,
									    entries_read,
									    buffer);
		case 3:
			return convert_samr_dispinfo_to_NET_DISPLAY_GROUP(mem_ctx,
									  &info->info3,
									  entries_read,
									  buffer);
		default:
			return WERR_UNKNOWN_LEVEL;
	}

	return WERR_OK;
}

/****************************************************************
****************************************************************/

WERROR NetQueryDisplayInformation_r(struct libnetapi_ctx *ctx,
				    struct NetQueryDisplayInformation *r)
{
	struct cli_state *cli = NULL;
	struct rpc_pipe_client *pipe_cli = NULL;
	struct policy_handle connect_handle;
	struct dom_sid2 *domain_sid = NULL;
	struct policy_handle domain_handle;
	union samr_DispInfo info;

	uint32_t total_size = 0;
	uint32_t returned_size = 0;

	NTSTATUS status;
	WERROR werr;

	ZERO_STRUCT(connect_handle);
	ZERO_STRUCT(domain_handle);

	switch (r->in.level) {
		case 1:
		case 2:
		case 3:
			break;
		default:
			return WERR_UNKNOWN_LEVEL;
	}

	werr = libnetapi_open_ipc_connection(ctx, r->in.server_name, &cli);
	if (!W_ERROR_IS_OK(werr)) {
		goto done;
	}

	werr = libnetapi_open_pipe(ctx, cli, PI_SAMR, &pipe_cli);
	if (!W_ERROR_IS_OK(werr)) {
		goto done;
	}

	werr = libnetapi_samr_open_domain(ctx, pipe_cli,
					  SAMR_ACCESS_ENUM_DOMAINS |
					  SAMR_ACCESS_OPEN_DOMAIN,
					  SAMR_DOMAIN_ACCESS_LOOKUP_INFO_2 |
					  SAMR_DOMAIN_ACCESS_ENUM_ACCOUNTS |
					  SAMR_DOMAIN_ACCESS_OPEN_ACCOUNT,
					  &connect_handle,
					  &domain_handle,
					  &domain_sid);
	if (!W_ERROR_IS_OK(werr)) {
		goto done;
	}

	status = rpccli_samr_QueryDisplayInfo2(pipe_cli,
					       ctx,
					       &domain_handle,
					       r->in.level,
					       r->in.idx,
					       r->in.entries_requested,
					       r->in.prefmaxlen,
					       &total_size,
					       &returned_size,
					       &info);
	if (!NT_STATUS_IS_OK(status)) {
		werr = ntstatus_to_werror(status);
		goto done;
	}

	werr = convert_samr_dispinfo_to_NET_DISPLAY(ctx, &info,
						    r->in.level,
						    r->out.entries_read,
						    r->out.buffer);
 done:
	if (!cli) {
		return werr;
	}

	if (is_valid_policy_hnd(&domain_handle)) {
		rpccli_samr_Close(pipe_cli, ctx, &domain_handle);
	}
	if (is_valid_policy_hnd(&connect_handle)) {
		rpccli_samr_Close(pipe_cli, ctx, &connect_handle);
	}

	return werr;

}

/****************************************************************
****************************************************************/


WERROR NetQueryDisplayInformation_l(struct libnetapi_ctx *ctx,
				    struct NetQueryDisplayInformation *r)
{
	return WERR_NOT_SUPPORTED;
}

/****************************************************************
****************************************************************/

WERROR NetUserChangePassword_r(struct libnetapi_ctx *ctx,
			       struct NetUserChangePassword *r)
{
	return WERR_NOT_SUPPORTED;
}

/****************************************************************
****************************************************************/

WERROR NetUserChangePassword_l(struct libnetapi_ctx *ctx,
			       struct NetUserChangePassword *r)
{
	return WERR_NOT_SUPPORTED;
}

/****************************************************************
****************************************************************/

WERROR NetUserGetInfo_r(struct libnetapi_ctx *ctx,
			struct NetUserGetInfo *r)
{
	return WERR_NOT_SUPPORTED;
}

/****************************************************************
****************************************************************/

WERROR NetUserGetInfo_l(struct libnetapi_ctx *ctx,
			struct NetUserGetInfo *r)
{
	return WERR_NOT_SUPPORTED;
}