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 3 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, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 /*
  21   a composite function for getting user information via samr pipe
  22 */
  23
  24 #include "includes.h"
  25 #include "libcli/composite/composite.h"
  26 #include "librpc/gen_ndr/security.h"
  27 #include "libcli/security/security.h"
  28 #include "libnet/libnet.h"
  29 #include "librpc/gen_ndr/ndr_samr_c.h"
  30
  31
  32 struct userinfo_state {
  33         struct dcerpc_pipe        *pipe;
  34         struct policy_handle      domain_handle;
  35         struct policy_handle      user_handle;
  36         uint16_t                  level;
  37         struct samr_LookupNames   lookup;
  38         struct samr_OpenUser      openuser;
  39         struct samr_QueryUserInfo queryuserinfo;
  40         struct samr_Close         samrclose;
  41         union  samr_UserInfo      *info;
  42
  43         /* information about the progress */
  44         void (*monitor_fn)(struct monitor_msg *);
  45 };
  46
  47
  48 static void continue_userinfo_lookup(struct tevent_req *subreq);
  49 static void continue_userinfo_openuser(struct tevent_req *subreq);
  50 static void continue_userinfo_getuser(struct tevent_req *subreq);
  51 static void continue_userinfo_closeuser(struct tevent_req *subreq);
  52
  53
  54 /**
  55  * Stage 1 (optional): Look for a username in SAM server.
  56  */
  57 static void continue_userinfo_lookup(struct tevent_req *subreq)
  58 {
  59         struct composite_context *c;
  60         struct userinfo_state *s;
  61         struct monitor_msg msg;
  62         struct msg_rpc_lookup_name *msg_lookup;
  63
  64         c = tevent_req_callback_data(subreq, struct composite_context);
  65         s = talloc_get_type(c->private_data, struct userinfo_state);
  66
  67         /* receive samr_Lookup reply */
  68         c->status = dcerpc_samr_LookupNames_r_recv(subreq, s);
  69         TALLOC_FREE(subreq);
  70         if (!composite_is_ok(c)) return;
  71
  72         /* there could be a problem with name resolving itself */
  73         if (!NT_STATUS_IS_OK(s->lookup.out.result)) {
  74                 composite_error(c, s->lookup.out.result);
  75                 return;
  76         }
  77
  78         /* issue a monitor message */
  79         if (s->monitor_fn) {
  80                 msg.type = mon_SamrLookupName;
  81                 msg_lookup = talloc(s, struct msg_rpc_lookup_name);
  82                 msg_lookup->rid = s->lookup.out.rids->ids;
  83                 msg_lookup->count = s->lookup.out.rids->count;
  84                 msg.data = (void*)msg_lookup;
  85                 msg.data_size = sizeof(*msg_lookup);
  86
  87                 s->monitor_fn(&msg);
  88         }
  89
  90
  91         /* have we actually got name resolved
  92            - we're looking for only one at the moment */
  93         if (s->lookup.out.rids->count != s->lookup.in.num_names) {
  94                 composite_error(c, NT_STATUS_INVALID_NETWORK_RESPONSE);
  95                 return;
  96         }
  97         if (s->lookup.out.types->count != s->lookup.in.num_names) {
  98                 composite_error(c, NT_STATUS_INVALID_NETWORK_RESPONSE);
  99                 return;
 100         }
 101
 102         /* TODO: find proper status code for more than one rid found */
 103
 104         /* prepare parameters for LookupNames */
 105         s->openuser.in.domain_handle  = &s->domain_handle;
 106         s->openuser.in.access_mask    = SEC_FLAG_MAXIMUM_ALLOWED;
 107         s->openuser.in.rid            = s->lookup.out.rids->ids[0];
 108         s->openuser.out.user_handle   = &s->user_handle;
 109
 110         /* send request */
 111         subreq = dcerpc_samr_OpenUser_r_send(s, c->event_ctx,
 112                                              s->pipe->binding_handle,
 113                                              &s->openuser);
 114         if (composite_nomem(subreq, c)) return;
 115
 116         tevent_req_set_callback(subreq, continue_userinfo_openuser, c);
 117 }
 118
 119
 120 /**
 121  * Stage 2: Open user policy handle.
 122  */
 123 static void continue_userinfo_openuser(struct tevent_req *subreq)
 124 {
 125         struct composite_context *c;
 126         struct userinfo_state *s;
 127         struct monitor_msg msg;
 128         struct msg_rpc_open_user *msg_open;
 129
 130         c = tevent_req_callback_data(subreq, struct composite_context);
 131         s = talloc_get_type(c->private_data, struct userinfo_state);
 132
 133         /* receive samr_OpenUser reply */
 134         c->status = dcerpc_samr_OpenUser_r_recv(subreq, s);
 135         TALLOC_FREE(subreq);
 136         if (!composite_is_ok(c)) return;
 137
 138         if (!NT_STATUS_IS_OK(s->queryuserinfo.out.result)) {
 139                 composite_error(c, s->queryuserinfo.out.result);
 140                 return;
 141         }
 142
 143         /* issue a monitor message */
 144         if (s->monitor_fn) {
 145                 msg.type = mon_SamrOpenUser;
 146                 msg_open = talloc(s, struct msg_rpc_open_user);
 147                 msg_open->rid = s->openuser.in.rid;
 148                 msg_open->access_mask = s->openuser.in.access_mask;
 149                 msg.data = (void*)msg_open;
 150                 msg.data_size = sizeof(*msg_open);
 151
 152                 s->monitor_fn(&msg);
 153         }
 154
 155         /* prepare parameters for QueryUserInfo call */
 156         s->queryuserinfo.in.user_handle = &s->user_handle;
 157         s->queryuserinfo.in.level       = s->level;
 158         s->queryuserinfo.out.info       = talloc(s, union samr_UserInfo *);
 159         if (composite_nomem(s->queryuserinfo.out.info, c)) return;
 160
 161         /* queue rpc call, set event handling and new state */
 162         subreq = dcerpc_samr_QueryUserInfo_r_send(s, c->event_ctx,
 163                                                   s->pipe->binding_handle,
 164                                                   &s->queryuserinfo);
 165         if (composite_nomem(subreq, c)) return;
 166
 167         tevent_req_set_callback(subreq, continue_userinfo_getuser, c);
 168 }
 169
 170
 171 /**
 172  * Stage 3: Get requested user information.
 173  */
 174 static void continue_userinfo_getuser(struct tevent_req *subreq)
 175 {
 176         struct composite_context *c;
 177         struct userinfo_state *s;
 178         struct monitor_msg msg;
 179         struct msg_rpc_query_user *msg_query;
 180
 181         c = tevent_req_callback_data(subreq, struct composite_context);
 182         s = talloc_get_type(c->private_data, struct userinfo_state);
 183
 184         /* receive samr_QueryUserInfo reply */
 185         c->status = dcerpc_samr_QueryUserInfo_r_recv(subreq, s);
 186         TALLOC_FREE(subreq);
 187         if (!composite_is_ok(c)) return;
 188
 189         /* check if queryuser itself went ok */
 190         if (!NT_STATUS_IS_OK(s->queryuserinfo.out.result)) {
 191                 composite_error(c, s->queryuserinfo.out.result);
 192                 return;
 193         }
 194
 195         s->info = talloc_steal(s, *(s->queryuserinfo.out.info));
 196
 197         /* issue a monitor message */
 198         if (s->monitor_fn) {
 199                 msg.type = mon_SamrQueryUser;
 200                 msg_query = talloc(s, struct msg_rpc_query_user);
 201                 msg_query->level = s->queryuserinfo.in.level;
 202                 msg.data = (void*)msg_query;
 203                 msg.data_size = sizeof(*msg_query);
 204
 205                 s->monitor_fn(&msg);
 206         }
 207
 208         /* prepare arguments for Close call */
 209         s->samrclose.in.handle  = &s->user_handle;
 210         s->samrclose.out.handle = &s->user_handle;
 211
 212         /* queue rpc call, set event handling and new state */
 213         subreq = dcerpc_samr_Close_r_send(s, c->event_ctx,
 214                                           s->pipe->binding_handle,
 215                                           &s->samrclose);
 216         if (composite_nomem(subreq, c)) return;
 217
 218         tevent_req_set_callback(subreq, continue_userinfo_closeuser, c);
 219 }
 220
 221
 222 /**
 223  * Stage 4: Close policy handle associated with opened user.
 224  */
 225 static void continue_userinfo_closeuser(struct tevent_req *subreq)
 226 {
 227         struct composite_context *c;
 228         struct userinfo_state *s;
 229         struct monitor_msg msg;
 230         struct msg_rpc_close_user *msg_close;
 231
 232         c = tevent_req_callback_data(subreq, struct composite_context);
 233         s = talloc_get_type(c->private_data, struct userinfo_state);
 234
 235         /* receive samr_Close reply */
 236         c->status = dcerpc_samr_Close_r_recv(subreq, s);
 237         TALLOC_FREE(subreq);
 238         if (!composite_is_ok(c)) return;
 239
 240         if (!NT_STATUS_IS_OK(s->samrclose.out.result)) {
 241                 composite_error(c, s->samrclose.out.result);
 242                 return;
 243         }
 244
 245         /* issue a monitor message */
 246         if (s->monitor_fn) {
 247                 msg.type = mon_SamrClose;
 248                 msg_close = talloc(s, struct msg_rpc_close_user);
 249                 msg_close->rid = s->openuser.in.rid;
 250                 msg.data = (void*)msg_close;
 251                 msg.data_size = sizeof(*msg_close);
 252
 253                 s->monitor_fn(&msg);
 254         }
 255
 256         composite_done(c);
 257 }
 258
 259
 260 /**
 261  * Sends asynchronous userinfo request
 262  *
 263  * @param p dce/rpc call pipe
 264  * @param io arguments and results of the call
 265  */
 266 struct composite_context *libnet_rpc_userinfo_send(struct dcerpc_pipe *p,
 267                                                    struct libnet_rpc_userinfo *io,
 268                                                    void (*monitor)(struct monitor_msg*))
 269 {
 270         struct composite_context *c;
 271         struct userinfo_state *s;
 272         struct dom_sid *sid;
 273         struct tevent_req *subreq;
 274
 275         if (!p || !io) return NULL;
 276
 277         c = composite_create(p, dcerpc_event_context(p));
 278         if (c == NULL) return c;
 279
 280         s = talloc_zero(c, struct userinfo_state);
 281         if (composite_nomem(s, c)) return c;
 282
 283         c->private_data = s;
 284
 285         s->level         = io->in.level;
 286         s->pipe          = p;
 287         s->domain_handle = io->in.domain_handle;
 288         s->monitor_fn    = monitor;
 289
 290         if (io->in.sid) {
 291                 sid = dom_sid_parse_talloc(s, io->in.sid);
 292                 if (composite_nomem(sid, c)) return c;
 293
 294                 s->openuser.in.domain_handle  = &s->domain_handle;
 295                 s->openuser.in.access_mask    = SEC_FLAG_MAXIMUM_ALLOWED;
 296                 s->openuser.in.rid            = sid->sub_auths[sid->num_auths - 1];
 297                 s->openuser.out.user_handle   = &s->user_handle;
 298
 299                 /* send request */
 300                 subreq = dcerpc_samr_OpenUser_r_send(s, c->event_ctx,
 301                                                      p->binding_handle,
 302                                                      &s->openuser);
 303                 if (composite_nomem(subreq, c)) return c;
 304
 305                 tevent_req_set_callback(subreq, continue_userinfo_openuser, c);
 306
 307         } else {
 308                 /* preparing parameters to send rpc request */
 309                 s->lookup.in.domain_handle    = &s->domain_handle;
 310                 s->lookup.in.num_names        = 1;
 311                 s->lookup.in.names            = talloc_array(s, struct lsa_String, 1);
 312                 if (composite_nomem(s->lookup.in.names, c)) return c;
 313                 s->lookup.out.rids         = talloc_zero(s, struct samr_Ids);
 314                 s->lookup.out.types        = talloc_zero(s, struct samr_Ids);
 315                 if (composite_nomem(s->lookup.out.rids, c)) return c;
 316                 if (composite_nomem(s->lookup.out.types, c)) return c;
 317
 318                 s->lookup.in.names[0].string  = talloc_strdup(s, io->in.username);
 319                 if (composite_nomem(s->lookup.in.names[0].string, c)) return c;
 320
 321                 /* send request */
 322                 subreq = dcerpc_samr_LookupNames_r_send(s, c->event_ctx,
 323                                                         p->binding_handle,
 324                                                         &s->lookup);
 325                 if (composite_nomem(subreq, c)) return c;
 326
 327                 tevent_req_set_callback(subreq, continue_userinfo_lookup, c);
 328         }
 329
 330         return c;
 331 }
 332
 333
 334 /**
 335  * Waits for and receives result of asynchronous userinfo call
 336  *
 337  * @param c composite context returned by asynchronous userinfo call
 338  * @param mem_ctx memory context of the call
 339  * @param io pointer to results (and arguments) of the call
 340  * @return nt status code of execution
 341  */
 342
 343 NTSTATUS libnet_rpc_userinfo_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 344                                   struct libnet_rpc_userinfo *io)
 345 {
 346         NTSTATUS status;
 347         struct userinfo_state *s;
 348
 349         /* wait for results of sending request */
 350         status = composite_wait(c);
 351
 352         if (NT_STATUS_IS_OK(status) && io) {
 353                 s = talloc_get_type(c->private_data, struct userinfo_state);
 354                 talloc_steal(mem_ctx, s->info);
 355                 io->out.info = *s->info;
 356         }
 357
 358         /* memory context associated to composite context is no longer needed */
 359         talloc_free(c);
 360         return status;
 361 }
 362
 363
 364 /**
 365  * Synchronous version of userinfo call
 366  *
 367  * @param pipe dce/rpc call pipe
 368  * @param mem_ctx memory context for the call
 369  * @param io arguments and results of the call
 370  * @return nt status code of execution
 371  */
 372
 373 NTSTATUS libnet_rpc_userinfo(struct dcerpc_pipe *p,
 374                              TALLOC_CTX *mem_ctx,
 375                              struct libnet_rpc_userinfo *io)
 376 {
 377         struct composite_context *c = libnet_rpc_userinfo_send(p, io, NULL);
 378         return libnet_rpc_userinfo_recv(c, mem_ctx, io);
 379 }