source4/libnet/userinfo.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Copyright (C) Rafal Szczesniak 2005
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 /*
  22   a composite function for getting user information via samr pipe
  23 */
  24
  25 #include "includes.h"
  26 #include "libcli/raw/libcliraw.h"
  27 #include "libcli/composite/composite.h"
  28 #include "libcli/composite/monitor.h"
  29 #include "librpc/gen_ndr/ndr_samr.h"
  30 #include "libnet/composite.h"
  31
  32 static void userinfo_handler(struct rpc_request *req);
  33
  34 enum userinfo_stage { USERINFO_OPENUSER, USERINFO_GETUSER, USERINFO_CLOSEUSER };
  35
  36 struct userinfo_state {
  37         enum userinfo_stage       stage;
  38         struct dcerpc_pipe        *pipe;
  39         struct rpc_request        *req;
  40         struct policy_handle      user_handle;
  41         uint16_t                  level;
  42         struct samr_OpenUser      openuser;
  43         struct samr_QueryUserInfo queryuserinfo;
  44         struct samr_Close         samrclose;
  45         union  samr_UserInfo      *info;
  46 };
  47
  48
  49 /**
  50  * Stage 1: Open user policy handle in SAM server.
  51  */
  52 static NTSTATUS userinfo_openuser(struct composite_context *c,
  53                                   struct userinfo_state *s)
  54 {
  55         /* receive samr_OpenUser reply */
  56         c->status = dcerpc_ndr_request_recv(s->req);
  57         NT_STATUS_NOT_OK_RETURN(c->status);
  58
  59         /* prepare parameters for QueryUserInfo call */
  60         s->queryuserinfo.in.user_handle = &s->user_handle;
  61         s->queryuserinfo.in.level       = s->level;
  62
  63         /* queue rpc call, set event handling and new state */
  64         s->req = dcerpc_samr_QueryUserInfo_send(s->pipe, c, &s->queryuserinfo);
  65         if (s->req == NULL) goto failure;
  66
  67         s->req->async.callback = userinfo_handler;
  68         s->req->async.private  = c;
  69         s->stage = USERINFO_GETUSER;
  70
  71         return NT_STATUS_OK;
  72
  73 failure:
  74         return NT_STATUS_UNSUCCESSFUL;
  75 }
  76
  77
  78 /**
  79  * Stage 2: Get requested user information.
  80  */
  81 static NTSTATUS userinfo_getuser(struct composite_context *c,
  82                                  struct userinfo_state *s)
  83 {
  84         /* receive samr_QueryUserInfo reply */
  85         c->status = dcerpc_ndr_request_recv(s->req);
  86         NT_STATUS_NOT_OK_RETURN(c->status);
  87
  88         s->info = talloc_steal(s, s->queryuserinfo.out.info);
  89
  90         /* prepare arguments for Close call */
  91         s->samrclose.in.handle  = &s->user_handle;
  92         s->samrclose.out.handle = &s->user_handle;
  93
  94         /* queue rpc call, set event handling and new state */
  95         s->req = dcerpc_samr_Close_send(s->pipe, c, &s->samrclose);
  96
  97         s->req->async.callback = userinfo_handler;
  98         s->req->async.private  = c;
  99         s->stage = USERINFO_CLOSEUSER;
 100
 101         return NT_STATUS_OK;
 102 }
 103
 104
 105 /**
 106  * Stage 3: Close policy handle associated with opened user.
 107  */
 108 static NTSTATUS userinfo_closeuser(struct composite_context *c,
 109                                    struct userinfo_state *s)
 110 {
 111         /* receive samr_Close reply */
 112         c->status = dcerpc_ndr_request_recv(s->req);
 113         NT_STATUS_NOT_OK_RETURN(c->status);
 114
 115         c->state = SMBCLI_REQUEST_DONE;
 116
 117         return NT_STATUS_OK;
 118 }
 119
 120
 121 /**
 122  * Event handler for asynchronous request. Handles transition through
 123  * intermediate stages of the call.
 124  *
 125  * @param req rpc call context
 126  */
 127 static void userinfo_handler(struct rpc_request *req)
 128 {
 129         struct composite_context *c = req->async.private;
 130         struct userinfo_state *s = talloc_get_type(c->private, struct userinfo_state);
 131         struct monitor_msg msg;
 132
 133         /* Stages of the call */
 134         switch (s->stage) {
 135         case USERINFO_OPENUSER:
 136                 c->status = userinfo_openuser(c, s);
 137                 msg.type = rpc_open_user;
 138                 msg.data.rpc_open_user.rid = s->openuser.in.rid;
 139                 msg.data.rpc_open_user.access_mask = s->openuser.in.access_mask;
 140                 break;
 141
 142         case USERINFO_GETUSER:
 143                 c->status = userinfo_getuser(c, s);
 144                 msg.type = rpc_query_user;
 145                 msg.data.rpc_query_user.level = s->queryuserinfo.in.level;
 146                 break;
 147
 148         case USERINFO_CLOSEUSER:
 149                 c->status = userinfo_closeuser(c, s);
 150                 msg.type = rpc_close_user;
 151                 msg.data.rpc_close_user.rid = s->openuser.in.rid;
 152                 break;
 153         }
 154
 155         if (!NT_STATUS_IS_OK(c->status)) {
 156                 c->state = SMBCLI_REQUEST_ERROR;
 157         }
 158
 159         if (c->monitor_fn) {
 160                 c->monitor_fn(&msg);
 161         }
 162
 163         if (c->state >= SMBCLI_REQUEST_DONE &&
 164             c->async.fn) {
 165                 c->async.fn(c);
 166         }
 167 }
 168
 169
 170 /**
 171  * Sends asynchronous userinfo request
 172  *
 173  * @param p dce/rpc call pipe
 174  * @param io arguments and results of the call
 175  */
 176 struct composite_context *libnet_rpc_userinfo_send(struct dcerpc_pipe *p,
 177                                                       struct libnet_rpc_userinfo *io,
 178                                                       void (*monitor)(struct monitor_msg*))
 179 {
 180         struct composite_context *c;
 181         struct userinfo_state *s;
 182         struct dom_sid *sid;
 183
 184         c = talloc_zero(p, struct composite_context);
 185         if (c == NULL) goto failure;
 186
 187         s = talloc_zero(c, struct userinfo_state);
 188         if (s == NULL) goto failure;
 189
 190         s->level = io->in.level;
 191         s->pipe  = p;
 192
 193         sid = dom_sid_parse_talloc(s, io->in.sid);
 194         if (sid == NULL) goto failure;
 195         c->state       = SMBCLI_REQUEST_SEND;
 196         c->private     = s;
 197         c->event_ctx   = dcerpc_event_context(p);
 198         c->monitor_fn  = monitor;
 199
 200         /* preparing parameters to send rpc request */
 201         s->openuser.in.domain_handle  = &io->in.domain_handle;
 202         s->openuser.in.access_mask    = SEC_FLAG_MAXIMUM_ALLOWED;
 203         s->openuser.in.rid            = sid->sub_auths[sid->num_auths - 1];
 204         s->openuser.out.user_handle   = &s->user_handle;
 205
 206         /* send request */
 207         s->req = dcerpc_samr_OpenUser_send(p, c, &s->openuser);
 208
 209         /* callback handler */
 210         s->req->async.callback = userinfo_handler;
 211         s->req->async.private  = c;
 212         s->stage = USERINFO_OPENUSER;
 213
 214         return c;
 215
 216 failure:
 217         talloc_free(c);
 218         return NULL;
 219 }
 220
 221
 222 /**
 223  * Waits for and receives result of asynchronous userinfo call
 224  *
 225  * @param c composite context returned by asynchronous userinfo call
 226  * @param mem_ctx memory context of the call
 227  * @param io pointer to results (and arguments) of the call
 228  * @return nt status code of execution
 229  */
 230
 231 NTSTATUS libnet_rpc_userinfo_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 232                                      struct libnet_rpc_userinfo *io)
 233 {
 234         NTSTATUS status;
 235         struct userinfo_state *s;
 236
 237         /* wait for results of sending request */
 238         status = composite_wait(c);
 239
 240         if (NT_STATUS_IS_OK(status) && io) {
 241                 s = talloc_get_type(c->private, struct userinfo_state);
 242                 talloc_steal(mem_ctx, s->info);
 243                 io->out.info = *s->info;
 244         }
 245
 246         /* memory context associated to composite context is no longer needed */
 247         talloc_free(c);
 248         return status;
 249 }
 250
 251
 252 /**
 253  * Synchronous version of userinfo call
 254  *
 255  * @param pipe dce/rpc call pipe
 256  * @param mem_ctx memory context for the call
 257  * @param io arguments and results of the call
 258  * @return nt status code of execution
 259  */
 260
 261 NTSTATUS libnet_rpc_userinfo(struct dcerpc_pipe *pipe,
 262                                 TALLOC_CTX *mem_ctx,
 263                                 struct libnet_rpc_userinfo *io)
 264 {
 265         struct composite_context *c = libnet_rpc_userinfo_send(pipe, io, NULL);
 266         return libnet_rpc_userinfo_recv(c, mem_ctx, io);
 267 }