source4/libnet/groupinfo.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Copyright (C) Rafal Szczesniak 2007
   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 group information via samr pipe
  22 */
  23
  24
  25 #include "includes.h"
  26 #include "libcli/composite/composite.h"
  27 #include "librpc/gen_ndr/security.h"
  28 #include "libcli/security/security.h"
  29 #include "libnet/libnet.h"
  30 #include "librpc/gen_ndr/ndr_samr_c.h"
  31
  32
  33 struct groupinfo_state {
  34         struct dcerpc_binding_handle *binding_handle;
  35         struct policy_handle       domain_handle;
  36         struct policy_handle       group_handle;
  37         uint16_t                   level;
  38         struct samr_LookupNames    lookup;
  39         struct samr_OpenGroup      opengroup;
  40         struct samr_QueryGroupInfo querygroupinfo;
  41         struct samr_Close          samrclose;
  42         union  samr_GroupInfo      *info;
  43
  44         /* information about the progress */
  45         void (*monitor_fn)(struct monitor_msg *);
  46 };
  47
  48
  49 static void continue_groupinfo_lookup(struct tevent_req *subreq);
  50 static void continue_groupinfo_opengroup(struct tevent_req *subreq);
  51 static void continue_groupinfo_getgroup(struct tevent_req *subreq);
  52 static void continue_groupinfo_closegroup(struct tevent_req *subreq);
  53
  54
  55 /**
  56  * Stage 1 (optional): Look for a group name in SAM server.
  57  */
  58 static void continue_groupinfo_lookup(struct tevent_req *subreq)
  59 {
  60         struct composite_context *c;
  61         struct groupinfo_state *s;
  62         struct monitor_msg msg;
  63         struct msg_rpc_lookup_name *msg_lookup;
  64
  65         c = tevent_req_callback_data(subreq, struct composite_context);
  66         s = talloc_get_type(c->private_data, struct groupinfo_state);
  67
  68         /* receive samr_Lookup reply */
  69         c->status = dcerpc_samr_LookupNames_r_recv(subreq, s);
  70         TALLOC_FREE(subreq);
  71         if (!composite_is_ok(c)) return;
  72
  73         /* there could be a problem with name resolving itself */
  74         if (!NT_STATUS_IS_OK(s->lookup.out.result)) {
  75                 composite_error(c, s->lookup.out.result);
  76                 return;
  77         }
  78
  79         /* issue a monitor message */
  80         if (s->monitor_fn) {
  81                 msg.type = mon_SamrLookupName;
  82                 msg_lookup = talloc(s, struct msg_rpc_lookup_name);
  83                 msg_lookup->rid = s->lookup.out.rids->ids;
  84                 msg_lookup->count = s->lookup.out.rids->count;
  85                 msg.data = (void*)msg_lookup;
  86                 msg.data_size = sizeof(*msg_lookup);
  87
  88                 s->monitor_fn(&msg);
  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->opengroup.in.domain_handle   = &s->domain_handle;
 106         s->opengroup.in.access_mask     = SEC_FLAG_MAXIMUM_ALLOWED;
 107         s->opengroup.in.rid             = s->lookup.out.rids->ids[0];
 108         s->opengroup.out.group_handle   = &s->group_handle;
 109
 110         /* send request */
 111         subreq = dcerpc_samr_OpenGroup_r_send(s, c->event_ctx,
 112                                               s->binding_handle,
 113                                               &s->opengroup);
 114         if (composite_nomem(subreq, c)) return;
 115
 116         tevent_req_set_callback(subreq, continue_groupinfo_opengroup, c);
 117 }
 118
 119
 120 /**
 121  * Stage 2: Open group policy handle.
 122  */
 123 static void continue_groupinfo_opengroup(struct tevent_req *subreq)
 124 {
 125         struct composite_context *c;
 126         struct groupinfo_state *s;
 127         struct monitor_msg msg;
 128         struct msg_rpc_open_group *msg_open;
 129
 130         c = tevent_req_callback_data(subreq, struct composite_context);
 131         s = talloc_get_type(c->private_data, struct groupinfo_state);
 132
 133         /* receive samr_OpenGroup reply */
 134         c->status = dcerpc_samr_OpenGroup_r_recv(subreq, s);
 135         TALLOC_FREE(subreq);
 136         if (!composite_is_ok(c)) return;
 137
 138         if (!NT_STATUS_IS_OK(s->opengroup.out.result)) {
 139                 composite_error(c, s->opengroup.out.result);
 140                 return;
 141         }
 142
 143         /* issue a monitor message */
 144         if (s->monitor_fn) {
 145                 msg.type = mon_SamrOpenGroup;
 146                 msg_open = talloc(s, struct msg_rpc_open_group);
 147                 msg_open->rid = s->opengroup.in.rid;
 148                 msg_open->access_mask = s->opengroup.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 QueryGroupInfo call */
 156         s->querygroupinfo.in.group_handle = &s->group_handle;
 157         s->querygroupinfo.in.level        = s->level;
 158         s->querygroupinfo.out.info        = talloc(s, union samr_GroupInfo *);
 159         if (composite_nomem(s->querygroupinfo.out.info, c)) return;
 160
 161         /* queue rpc call, set event handling and new state */
 162         subreq = dcerpc_samr_QueryGroupInfo_r_send(s,
 163                                                    c->event_ctx,
 164                                                    s->binding_handle,
 165                                                    &s->querygroupinfo);
 166         if (composite_nomem(subreq, c)) return;
 167
 168         tevent_req_set_callback(subreq, continue_groupinfo_getgroup, c);
 169 }
 170
 171
 172 /**
 173  * Stage 3: Get requested group information.
 174  */
 175 static void continue_groupinfo_getgroup(struct tevent_req *subreq)
 176 {
 177         struct composite_context *c;
 178         struct groupinfo_state *s;
 179         struct monitor_msg msg;
 180         struct msg_rpc_query_group *msg_query;
 181
 182         c = tevent_req_callback_data(subreq, struct composite_context);
 183         s = talloc_get_type(c->private_data, struct groupinfo_state);
 184
 185         /* receive samr_QueryGroupInfo reply */
 186         c->status = dcerpc_samr_QueryGroupInfo_r_recv(subreq, s);
 187         TALLOC_FREE(subreq);
 188         if (!composite_is_ok(c)) return;
 189
 190         /* check if querygroup itself went ok */
 191         if (!NT_STATUS_IS_OK(s->querygroupinfo.out.result)) {
 192                 composite_error(c, s->querygroupinfo.out.result);
 193                 return;
 194         }
 195
 196         s->info = talloc_steal(s, *s->querygroupinfo.out.info);
 197
 198         /* issue a monitor message */
 199         if (s->monitor_fn) {
 200                 msg.type = mon_SamrQueryGroup;
 201                 msg_query = talloc(s, struct msg_rpc_query_group);
 202                 msg_query->level = s->querygroupinfo.in.level;
 203                 msg.data = (void*)msg_query;
 204                 msg.data_size = sizeof(*msg_query);
 205
 206                 s->monitor_fn(&msg);
 207         }
 208
 209         /* prepare arguments for Close call */
 210         s->samrclose.in.handle  = &s->group_handle;
 211         s->samrclose.out.handle = &s->group_handle;
 212
 213         /* queue rpc call, set event handling and new state */
 214         subreq = dcerpc_samr_Close_r_send(s, c->event_ctx,
 215                                           s->binding_handle,
 216                                           &s->samrclose);
 217         if (composite_nomem(subreq, c)) return;
 218
 219         tevent_req_set_callback(subreq, continue_groupinfo_closegroup, c);
 220 }
 221
 222
 223 /**
 224  * Stage 4: Close policy handle associated with opened group.
 225  */
 226 static void continue_groupinfo_closegroup(struct tevent_req *subreq)
 227 {
 228         struct composite_context *c;
 229         struct groupinfo_state *s;
 230         struct monitor_msg msg;
 231         struct msg_rpc_close_group *msg_close;
 232
 233         c = tevent_req_callback_data(subreq, struct composite_context);
 234         s = talloc_get_type(c->private_data, struct groupinfo_state);
 235
 236         /* receive samr_Close reply */
 237         c->status = dcerpc_samr_Close_r_recv(subreq, s);
 238         TALLOC_FREE(subreq);
 239         if (!composite_is_ok(c)) return;
 240
 241         if (!NT_STATUS_IS_OK(s->samrclose.out.result)) {
 242                 composite_error(c, s->samrclose.out.result);
 243                 return;
 244         }
 245
 246         /* issue a monitor message */
 247         if (s->monitor_fn) {
 248                 msg.type = mon_SamrClose;
 249                 msg_close = talloc(s, struct msg_rpc_close_group);
 250                 msg_close->rid = s->opengroup.in.rid;
 251                 msg.data = (void*)msg_close;
 252                 msg.data_size = sizeof(*msg_close);
 253
 254                 s->monitor_fn(&msg);
 255         }
 256
 257         composite_done(c);
 258 }
 259
 260
 261 /**
 262  * Sends asynchronous groupinfo request
 263  *
 264  * @param p dce/rpc call pipe
 265  * @param io arguments and results of the call
 266  */
 267 struct composite_context *libnet_rpc_groupinfo_send(TALLOC_CTX *mem_ctx,
 268                                                     struct tevent_context *ev,
 269                                                     struct dcerpc_binding_handle *b,
 270                                                     struct libnet_rpc_groupinfo *io,
 271                                                     void (*monitor)(struct monitor_msg*))
 272 {
 273         struct composite_context *c;
 274         struct groupinfo_state *s;
 275         struct dom_sid *sid;
 276         struct tevent_req *subreq;
 277
 278         if (!b || !io) return NULL;
 279
 280         c = composite_create(mem_ctx, ev);
 281         if (c == NULL) return c;
 282
 283         s = talloc_zero(c, struct groupinfo_state);
 284         if (composite_nomem(s, c)) return c;
 285
 286         c->private_data = s;
 287
 288         s->level         = io->in.level;
 289         s->binding_handle= b;
 290         s->domain_handle = io->in.domain_handle;
 291         s->monitor_fn    = monitor;
 292
 293         if (io->in.sid) {
 294                 sid = dom_sid_parse_talloc(s, io->in.sid);
 295                 if (composite_nomem(sid, c)) return c;
 296
 297                 s->opengroup.in.domain_handle  = &s->domain_handle;
 298                 s->opengroup.in.access_mask    = SEC_FLAG_MAXIMUM_ALLOWED;
 299                 s->opengroup.in.rid            = sid->sub_auths[sid->num_auths - 1];
 300                 s->opengroup.out.group_handle  = &s->group_handle;
 301
 302                 /* send request */
 303                 subreq = dcerpc_samr_OpenGroup_r_send(s, c->event_ctx,
 304                                                       s->binding_handle,
 305                                                       &s->opengroup);
 306                 if (composite_nomem(subreq, c)) return c;
 307
 308                 tevent_req_set_callback(subreq, continue_groupinfo_opengroup, c);
 309
 310         } else {
 311                 /* preparing parameters to send rpc request */
 312                 s->lookup.in.domain_handle    = &s->domain_handle;
 313                 s->lookup.in.num_names        = 1;
 314                 s->lookup.in.names            = talloc_array(s, struct lsa_String, 1);
 315                 if (composite_nomem(s->lookup.in.names, c)) return c;
 316
 317                 s->lookup.in.names[0].string  = talloc_strdup(s, io->in.groupname);
 318                 if (composite_nomem(s->lookup.in.names[0].string, c)) return c;
 319                 s->lookup.out.rids         = talloc_zero(s, struct samr_Ids);
 320                 s->lookup.out.types        = talloc_zero(s, struct samr_Ids);
 321                 if (composite_nomem(s->lookup.out.rids, c)) return c;
 322                 if (composite_nomem(s->lookup.out.types, c)) return c;
 323
 324                 /* send request */
 325                 subreq = dcerpc_samr_LookupNames_r_send(s, c->event_ctx,
 326                                                         s->binding_handle,
 327                                                         &s->lookup);
 328                 if (composite_nomem(subreq, c)) return c;
 329
 330                 tevent_req_set_callback(subreq, continue_groupinfo_lookup, c);
 331         }
 332
 333         return c;
 334 }
 335
 336
 337 /**
 338  * Waits for and receives result of asynchronous groupinfo call
 339  *
 340  * @param c composite context returned by asynchronous groupinfo call
 341  * @param mem_ctx memory context of the call
 342  * @param io pointer to results (and arguments) of the call
 343  * @return nt status code of execution
 344  */
 345
 346 NTSTATUS libnet_rpc_groupinfo_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 347                                    struct libnet_rpc_groupinfo *io)
 348 {
 349         NTSTATUS status;
 350         struct groupinfo_state *s;
 351
 352         /* wait for results of sending request */
 353         status = composite_wait(c);
 354
 355         if (NT_STATUS_IS_OK(status) && io) {
 356                 s = talloc_get_type(c->private_data, struct groupinfo_state);
 357                 talloc_steal(mem_ctx, s->info);
 358                 io->out.info = *s->info;
 359         }
 360
 361         /* memory context associated to composite context is no longer needed */
 362         talloc_free(c);
 363         return status;
 364 }
 365
 366
 367 /**
 368  * Synchronous version of groupinfo call
 369  *
 370  * @param pipe dce/rpc call pipe
 371  * @param mem_ctx memory context for the call
 372  * @param io arguments and results of the call
 373  * @return nt status code of execution
 374  */
 375
 376 NTSTATUS libnet_rpc_groupinfo(struct tevent_context *ev,
 377                               struct dcerpc_binding_handle *b,
 378                               TALLOC_CTX *mem_ctx,
 379                               struct libnet_rpc_groupinfo *io)
 380 {
 381         struct composite_context *c = libnet_rpc_groupinfo_send(mem_ctx, ev, b,
 382                                                                 io, NULL);
 383         return libnet_rpc_groupinfo_recv(c, mem_ctx, io);
 384 }