libnet_domain.c

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/* 
   Unix SMB/CIFS implementation.

   Copyright (C) Rafal Szczesniak 2005
   
   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/>.
*/

/*
  a composite function for domain handling on samr and lsa pipes
*/

#include "includes.h"
#include "libcli/composite/composite.h"
#include "libnet/libnet.h"
#include "librpc/gen_ndr/ndr_samr_c.h"
#include "librpc/gen_ndr/ndr_lsa_c.h"


struct domain_open_samr_state {
	struct libnet_context     *ctx;
	struct dcerpc_pipe        *pipe;
	struct libnet_RpcConnect  rpcconn;
	struct samr_Connect       connect;
	struct samr_LookupDomain  lookup;
	struct samr_OpenDomain    open;
	struct samr_Close         close;
	struct lsa_String         domain_name;
	uint32_t                  access_mask;
	struct policy_handle      connect_handle;
	struct policy_handle      domain_handle;

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


static void continue_domain_open_close(struct rpc_request *req);
static void continue_domain_open_connect(struct rpc_request *req);
static void continue_domain_open_lookup(struct rpc_request *req);
static void continue_domain_open_open(struct rpc_request *req);


/**
 * Stage 0.5 (optional): Connect to samr rpc pipe
 */
static void continue_domain_open_rpc_connect(struct composite_context *ctx)
{
	struct composite_context *c;
	struct domain_open_samr_state *s;
	struct rpc_request *conn_req;

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

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

	s->pipe = s->rpcconn.out.dcerpc_pipe;

	/* preparing parameters for samr_Connect rpc call */
	s->connect.in.system_name      = 0;
	s->connect.in.access_mask      = s->access_mask;
	s->connect.out.connect_handle  = &s->connect_handle;

	/* send request */
	conn_req = dcerpc_samr_Connect_send(s->pipe, c, &s->connect);
	if (composite_nomem(conn_req, c)) return;

	/* callback handler */
	composite_continue_rpc(c, conn_req, continue_domain_open_connect, c);
}


/**
 * Stage 0.5 (optional): Close existing (in libnet context) domain
 * handle
 */
static void continue_domain_open_close(struct rpc_request *req)
{
	struct composite_context *c;
	struct domain_open_samr_state *s;
	struct rpc_request *conn_req;

	c = talloc_get_type(req->async.private_data, struct composite_context);
	s = talloc_get_type(c->private_data, struct domain_open_samr_state);

	/* receive samr_Close reply */
	c->status = dcerpc_ndr_request_recv(req);
	if (!composite_is_ok(c)) return;

	if (s->monitor_fn) {
		struct monitor_msg msg;
		
		msg.type = mon_SamrClose;
		msg.data = NULL;
		msg.data_size = 0;
		s->monitor_fn(&msg);
	}

	/* reset domain handle and associated data in libnet_context */
	s->ctx->samr.name        = NULL;
	s->ctx->samr.access_mask = 0;
	ZERO_STRUCT(s->ctx->samr.handle);

	/* preparing parameters for samr_Connect rpc call */
	s->connect.in.system_name      = 0;
	s->connect.in.access_mask      = s->access_mask;
	s->connect.out.connect_handle  = &s->connect_handle;
	
	/* send request */
	conn_req = dcerpc_samr_Connect_send(s->pipe, c, &s->connect);
	if (composite_nomem(conn_req, c)) return;

	/* callback handler */
	composite_continue_rpc(c, conn_req, continue_domain_open_connect, c);
}


/**
 * Stage 1: Connect to SAM server.
 */
static void continue_domain_open_connect(struct rpc_request *req)
{
	struct composite_context *c;
	struct domain_open_samr_state *s;
	struct rpc_request *lookup_req;
	struct samr_LookupDomain *r;
	
	c = talloc_get_type(req->async.private_data, struct composite_context);
	s = talloc_get_type(c->private_data, struct domain_open_samr_state);

	/* receive samr_Connect reply */
	c->status = dcerpc_ndr_request_recv(req);
	if (!composite_is_ok(c)) return;

	if (s->monitor_fn) {
		struct monitor_msg msg;

		msg.type = mon_SamrConnect;
		msg.data = NULL;
		msg.data_size = 0;
		s->monitor_fn(&msg);
	}

	r = &s->lookup;

	/* prepare for samr_LookupDomain call */
	r->in.connect_handle = &s->connect_handle;
	r->in.domain_name    = &s->domain_name;

	lookup_req = dcerpc_samr_LookupDomain_send(s->pipe, c, r);
	if (composite_nomem(lookup_req, c)) return;

	composite_continue_rpc(c, lookup_req, continue_domain_open_lookup, c);
}


/**
 * Stage 2: Lookup domain by name.
 */
static void continue_domain_open_lookup(struct rpc_request *req)
{
	struct composite_context *c;
	struct domain_open_samr_state *s;
	struct rpc_request *opendom_req;
	struct samr_OpenDomain *r;

	c = talloc_get_type(req->async.private_data, struct composite_context);
	s = talloc_get_type(c->private_data, struct domain_open_samr_state);
	
	/* receive samr_LookupDomain reply */
	c->status = dcerpc_ndr_request_recv(req);

	if (s->monitor_fn) {
		struct monitor_msg msg;
		struct msg_rpc_lookup_domain data;

		data.domain_name = s->domain_name.string;

		msg.type = mon_SamrLookupDomain;
		msg.data = (void*)&data;
		msg.data_size = sizeof(data);
		s->monitor_fn(&msg);
	}

	r = &s->open;

	/* check the rpc layer status */
	if (!composite_is_ok(c));

	/* check the rpc call itself status */
	if (!NT_STATUS_IS_OK(s->lookup.out.result)) {
		composite_error(c, s->lookup.out.result);
		return;
	}

	/* prepare for samr_OpenDomain call */
	r->in.connect_handle = &s->connect_handle;
	r->in.access_mask    = SEC_FLAG_MAXIMUM_ALLOWED;
	r->in.sid            = s->lookup.out.sid;
	r->out.domain_handle = &s->domain_handle;

	opendom_req = dcerpc_samr_OpenDomain_send(s->pipe, c, r);
	if (composite_nomem(opendom_req, c)) return;

	composite_continue_rpc(c, opendom_req, continue_domain_open_open, c);
}


/*
 * Stage 3: Open domain.
 */
static void continue_domain_open_open(struct rpc_request *req)
{
	struct composite_context *c;
	struct domain_open_samr_state *s;

	c = talloc_get_type(req->async.private_data, struct composite_context);
	s = talloc_get_type(c->private_data, struct domain_open_samr_state);

	/* receive samr_OpenDomain reply */
	c->status = dcerpc_ndr_request_recv(req);
	if (!composite_is_ok(c)) return;

	if (s->monitor_fn) {
		struct monitor_msg msg;
		
		msg.type = mon_SamrOpenDomain;
		msg.data = NULL;
		msg.data_size = 0;
		s->monitor_fn(&msg);
	}

	composite_done(c);
}


/**
 * Sends asynchronous DomainOpenSamr request
 *
 * @param ctx initialised libnet context
 * @param io arguments and results of the call
 * @param monitor pointer to monitor function that is passed monitor message
 */

struct composite_context *libnet_DomainOpenSamr_send(struct libnet_context *ctx,
						     struct libnet_DomainOpen *io,
						     void (*monitor)(struct monitor_msg*))
{
	struct composite_context *c;
	struct domain_open_samr_state *s;
	struct composite_context *rpcconn_req;
	struct rpc_request *close_req, *conn_req;

	c = composite_create(ctx, ctx->event_ctx);
	if (c == NULL) return NULL;

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

	c->private_data = s;
	s->monitor_fn   = monitor;

	s->ctx                 = ctx;
	s->pipe                = ctx->samr.pipe;
	s->access_mask         = io->in.access_mask;
	s->domain_name.string  = talloc_strdup(c, io->in.domain_name);

	/* check, if there's samr pipe opened already, before opening a domain */
	if (ctx->samr.pipe == NULL) {

		/* attempting to connect a domain controller */
		s->rpcconn.level           = LIBNET_RPC_CONNECT_DC;
		s->rpcconn.in.name         = io->in.domain_name;
		s->rpcconn.in.dcerpc_iface = &ndr_table_samr;
		
		/* send rpc pipe connect request */
		rpcconn_req = libnet_RpcConnect_send(ctx, c, &s->rpcconn, s->monitor_fn);
		if (composite_nomem(rpcconn_req, c)) return c;

		composite_continue(c, rpcconn_req, continue_domain_open_rpc_connect, c);
		return c;
	}

	/* libnet context's domain handle is not empty, so check out what
	   was opened first, before doing anything */
	if (!policy_handle_empty(&ctx->samr.handle)) {
		if (strequal(ctx->samr.name, io->in.domain_name) &&
		    ctx->samr.access_mask == io->in.access_mask) {

			/* this domain is already opened */
			composite_done(c);
			return c;

		} else {
			/* another domain or access rights have been
			   requested - close the existing handle first */
			s->close.in.handle = &ctx->samr.handle;

			/* send request to close domain handle */
			close_req = dcerpc_samr_Close_send(s->pipe, c, &s->close);
			if (composite_nomem(close_req, c)) return c;

			/* callback handler */
			composite_continue_rpc(c, close_req, continue_domain_open_close, c);
			return c;
		}
	}

	/* preparing parameters for samr_Connect rpc call */
	s->connect.in.system_name      = 0;
	s->connect.in.access_mask      = s->access_mask;
	s->connect.out.connect_handle  = &s->connect_handle;
	
	/* send request */
	conn_req = dcerpc_samr_Connect_send(s->pipe, c, &s->connect);
	if (composite_nomem(conn_req, c)) return c;

	/* callback handler */
	composite_continue_rpc(c, conn_req, continue_domain_open_connect, c);
	return c;
}


/**
 * Waits for and receives result of asynchronous DomainOpenSamr call
 * 
 * @param c composite context returned by asynchronous DomainOpen call
 * @param ctx initialised libnet context
 * @param mem_ctx memory context of the call
 * @param io pointer to results (and arguments) of the call
 * @return nt status code of execution
 */

NTSTATUS libnet_DomainOpenSamr_recv(struct composite_context *c, struct libnet_context *ctx,
				    TALLOC_CTX *mem_ctx, struct libnet_DomainOpen *io)
{
	NTSTATUS status;
	struct domain_open_samr_state *s;

	/* wait for results of sending request */
	status = composite_wait(c);
	
	if (NT_STATUS_IS_OK(status) && io) {
		s = talloc_get_type(c->private_data, struct domain_open_samr_state);
		io->out.domain_handle = s->domain_handle;

		/* store the resulting handle and related data for use by other
		   libnet functions */
		ctx->samr.connect_handle = s->connect_handle;
		ctx->samr.handle      = s->domain_handle;
		ctx->samr.sid         = talloc_steal(ctx, s->lookup.out.sid);
		ctx->samr.name        = talloc_steal(ctx, s->domain_name.string);
		ctx->samr.access_mask = s->access_mask;
	}

	talloc_free(c);
	return status;
}


struct domain_open_lsa_state {
	const char *name;
	uint32_t access_mask;
	struct libnet_context *ctx;
	struct libnet_RpcConnect rpcconn;
	struct lsa_OpenPolicy2   openpol;
	struct policy_handle handle;
	struct dcerpc_pipe *pipe;

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


static void continue_rpc_connect_lsa(struct composite_context *ctx);
static void continue_lsa_policy_open(struct rpc_request *req);


/**
 * Sends asynchronous DomainOpenLsa request
 *
 * @param ctx initialised libnet context
 * @param io arguments and results of the call
 * @param monitor pointer to monitor function that is passed monitor message
 */

struct composite_context* libnet_DomainOpenLsa_send(struct libnet_context *ctx,
						    struct libnet_DomainOpen *io,
						    void (*monitor)(struct monitor_msg*))
{
	struct composite_context *c;
	struct domain_open_lsa_state *s;
	struct composite_context *rpcconn_req;
	struct rpc_request *openpol_req;
	struct lsa_QosInfo *qos;

	/* create composite context and state */
	c = composite_create(ctx, ctx->event_ctx);
	if (c == NULL) return c;

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

	c->private_data = s;