libnet_group.c

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/* 
   Unix SMB/CIFS implementation.
   
   Copyright (C) Rafal Szczesniak  2007
   
   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 "libnet/libnet.h"
#include "libcli/composite/composite.h"
#include "librpc/gen_ndr/lsa.h"
#include "librpc/gen_ndr/ndr_lsa_c.h"
#include "librpc/gen_ndr/samr.h"
#include "librpc/gen_ndr/ndr_samr_c.h"
#include "libcli/security/security.h"


struct create_group_state {
	struct libnet_context *ctx;
	struct libnet_CreateGroup r;
	struct libnet_DomainOpen domain_open;
	struct libnet_rpc_groupadd group_add;

	/* information about the progress */
	void (*monitor_fn)(struct monitor_msg *);
};


static void continue_domain_opened(struct composite_context *ctx);
static void continue_rpc_group_added(struct composite_context *ctx);


struct composite_context* libnet_CreateGroup_send(struct libnet_context *ctx,
						  TALLOC_CTX *mem_ctx,
						  struct libnet_CreateGroup *r,
						  void (*monitor)(struct monitor_msg*))
{
	struct composite_context *c;
	struct create_group_state *s;
	struct composite_context *create_req;
	bool prereq_met = false;

	/* composite context allocation and setup */
	c = composite_create(mem_ctx, ctx->event_ctx);
	if (c == NULL) return NULL;

	s = talloc_zero(c, struct create_group_state);
	if (composite_nomem(s, c)) return c;

	c->private_data = s;

	s->ctx = ctx;
	s->r   = *r;
	ZERO_STRUCT(s->r.out);

	/* prerequisite: make sure we have a valid samr domain handle */
	prereq_met = samr_domain_opened(ctx, s->r.in.domain_name, &c, &s->domain_open,
					continue_domain_opened, monitor);
	if (!prereq_met) return c;

	/* prepare arguments of rpc group add call */
	s->group_add.in.groupname     = r->in.group_name;
	s->group_add.in.domain_handle = ctx->samr.handle;

	/* send the request */
	create_req = libnet_rpc_groupadd_send(ctx->samr.pipe, &s->group_add, monitor);
	if (composite_nomem(create_req, c)) return c;

	composite_continue(c, create_req, continue_rpc_group_added, c);
	return c;
}


static void continue_domain_opened(struct composite_context *ctx)
{
	struct composite_context *c;
	struct create_group_state *s;
	struct composite_context *create_req;
	
	c = talloc_get_type(ctx->async.private_data, struct composite_context);
	s = talloc_get_type(c->private_data, struct create_group_state);

	c->status = libnet_DomainOpen_recv(ctx, s->ctx, c, &s->domain_open);
	if (!composite_is_ok(c)) return;

	/* prepare arguments of groupadd call */
	s->group_add.in.groupname     = s->r.in.group_name;
	s->group_add.in.domain_handle = s->ctx->samr.handle;

	/* send the request */
	create_req = libnet_rpc_groupadd_send(s->ctx->samr.pipe, &s->group_add,
					      s->monitor_fn);
	if (composite_nomem(create_req, c)) return;

	composite_continue(c, create_req, continue_rpc_group_added, c);
}


static void continue_rpc_group_added(struct composite_context *ctx)
{
	struct composite_context *c;
	struct create_group_state *s;

	c = talloc_get_type(ctx->async.private_data, struct composite_context);
	s = talloc_get_type(c->private_data, struct create_group_state);

	/* receive result of group add call */
	c->status = libnet_rpc_groupadd_recv(ctx, c, &s->group_add);
	if (!composite_is_ok(c)) return;

	/* we're done */
	composite_done(c);
}


/**
 * Receive result of CreateGroup call
 *
 * @param c composite context returned by send request routine
 * @param mem_ctx memory context of this call
 * @param r pointer to a structure containing arguments and result of this call
 * @return nt status
 */
NTSTATUS libnet_CreateGroup_recv(struct composite_context *c,
				 TALLOC_CTX *mem_ctx,
				 struct libnet_CreateGroup *r)
{
	NTSTATUS status;
	struct create_group_state *s;

	status = composite_wait(c);
	if (!NT_STATUS_IS_OK(status)) {
		s = talloc_get_type(c->private_data, struct create_group_state);
		r->out.error_string = talloc_strdup(mem_ctx, nt_errstr(status));
	}

	return status;
}


/**
 * Create domain group
 *
 * @param ctx initialised libnet context
 * @param mem_ctx memory context of this call
 * @param io pointer to structure containing arguments and result of this call
 * @return nt status
 */
NTSTATUS libnet_CreateGroup(struct libnet_context *ctx, TALLOC_CTX *mem_ctx,
			    struct libnet_CreateGroup *io)
{
	struct composite_context *c;

	c = libnet_CreateGroup_send(ctx, mem_ctx, io, NULL);
	return libnet_CreateGroup_recv(c, mem_ctx, io);
}


struct group_info_state {
	struct libnet_context *ctx;
	const char *domain_name;
	const char *group_name;
	struct libnet_LookupName lookup;
	struct libnet_DomainOpen domopen;
	struct libnet_rpc_groupinfo info;
	
	/* information about the progress */
	void (*monitor_fn)(struct monitor_msg *);
};


static void continue_domain_open_info(struct composite_context *ctx);
static void continue_name_found(struct composite_context *ctx);
static void continue_group_info(struct composite_context *ctx);

/**
 * Sends request to get group information
 *
 * @param ctx initialised libnet context
 * @param mem_ctx memory context of this call
 * @param io pointer to structure containing arguments the call
 * @param monitor function pointer for receiving monitor messages
 * @return composite context of this request
 */
struct composite_context* libnet_GroupInfo_send(struct libnet_context *ctx,
						TALLOC_CTX *mem_ctx,
						struct libnet_GroupInfo *io,
						void (*monitor)(struct monitor_msg*))
{
	struct composite_context *c;
	struct group_info_state *s;
	bool prereq_met = false;
	struct composite_context *lookup_req;

	/* composite context allocation and setup */
	c = composite_create(mem_ctx, ctx->event_ctx);
	if (c == NULL) return NULL;

	s = talloc_zero(c, struct group_info_state);
	if (composite_nomem(s, c)) return c;

	c->private_data = s;

	/* store arguments in the state structure */
	s->monitor_fn = monitor;
	s->ctx = ctx;	
	s->domain_name = talloc_strdup(c, io->in.domain_name);
	s->group_name  = talloc_strdup(c, io->in.group_name);

	/* prerequisite: make sure the domain is opened */
	prereq_met = samr_domain_opened(ctx, s->domain_name, &c, &s->domopen,
					continue_domain_open_info, monitor);
	if (!prereq_met) return c;
	
	/* prepare arguments for LookupName call */
	s->lookup.in.name        = s->group_name;
	s->lookup.in.domain_name = s->domain_name;

	/* send the request */
	lookup_req = libnet_LookupName_send(s->ctx, c, &s->lookup, s->monitor_fn);
	if (composite_nomem(lookup_req, c)) return c;

	/* set the next stage */
	composite_continue(c, lookup_req, continue_name_found, c);
	return c;
}


/*
 * Stage 0.5 (optional): receive opened domain and send lookup name request
 */
static void continue_domain_open_info(struct composite_context *ctx)
{
	struct composite_context *c;
	struct group_info_state *s;
	struct composite_context *lookup_req;
	
	c = talloc_get_type(ctx->async.private_data, struct composite_context);
	s = talloc_get_type(c->private_data, struct group_info_state);
	
	/* receive domain handle */
	c->status = libnet_DomainOpen_recv(ctx, s->ctx, c, &s->domopen);
	if (!composite_is_ok(c)) return;

	/* prepare arguments for LookupName call */
	s->lookup.in.name        = s->group_name;
	s->lookup.in.domain_name = s->domain_name;

	/* send the request */
	lookup_req = libnet_LookupName_send(s->ctx, c, &s->lookup, s->monitor_fn);
	if (composite_nomem(lookup_req, c)) return;
	
	/* set the next stage */
	composite_continue(c, lookup_req, continue_name_found, c);
}


/*
 * Stage 1: Receive SID found and send request for group info
 */
static void continue_name_found(struct composite_context *ctx)
{
	struct composite_context *c;
	struct group_info_state *s;
	struct composite_context *info_req;

	c = talloc_get_type(ctx->async.private_data, struct composite_context);
	s = talloc_get_type(c->private_data, struct group_info_state);

	/* receive SID assiociated with name found */
	c->status = libnet_LookupName_recv(ctx, c, &s->lookup);
	if (!composite_is_ok(c)) return;
	
	/* Is is a group SID actually ? */
	if (s->lookup.out.sid_type != SID_NAME_DOM_GRP &&
	    s->lookup.out.sid_type != SID_NAME_ALIAS) {
		composite_error(c, NT_STATUS_NO_SUCH_GROUP);
	}

	/* prepare arguments for groupinfo call */
	s->info.in.domain_handle = s->ctx->samr.handle;
	s->info.in.groupname     = s->group_name;
	s->info.in.sid           = s->lookup.out.sidstr;
	/* we're looking for all information available */
	s->info.in.level         = GROUPINFOALL;

	/* send the request */
	info_req = libnet_rpc_groupinfo_send(s->ctx->samr.pipe, &s->info, s->monitor_fn);
	if (composite_nomem(info_req, c)) return;

	/* set the next stage */
	composite_continue(c, info_req, continue_group_info, c);
}


/*
 * Stage 2: Receive group information
 */
static void continue_group_info(struct composite_context *ctx)
{
	struct composite_context *c;
	struct group_info_state *s;

	c = talloc_get_type(ctx->async.private_data, struct composite_context);
	s = talloc_get_type(c->private_data, struct group_info_state);

	/* receive group information */
	c->status = libnet_rpc_groupinfo_recv(ctx, c, &s->info);
	if (!composite_is_ok(c)) return;

	/* we're done */
	composite_done(c);
}


/*
 * Receive group information
 *
 * @param c composite context returned by libnet_GroupInfo_send
 * @param mem_ctx memory context of this call
 * @param io pointer to structure receiving results of the call
 * @result nt status
 */
NTSTATUS libnet_GroupInfo_recv(struct composite_context* c, TALLOC_CTX *mem_ctx,
			       struct libnet_GroupInfo *io)
{
	NTSTATUS status;
	struct group_info_state *s;