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_pipe         *pipe;
  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
  92         /* have we actually got name resolved
  93            - we're looking for only one at the moment */
  94         if (s->lookup.out.rids->count == 0) {
  95                 composite_error(c, NT_STATUS_NO_SUCH_USER);
  96                 return;
  97         }
  98
  99         /* TODO: find proper status code for more than one rid found */
 100
 101         /* prepare parameters for LookupNames */
 102         s->opengroup.in.domain_handle   = &s->domain_handle;
 103         s->opengroup.in.access_mask     = SEC_FLAG_MAXIMUM_ALLOWED;
 104         s->opengroup.in.rid             = s->lookup.out.rids->ids[0];
 105         s->opengroup.out.group_handle   = &s->group_handle;
 106
 107         /* send request */
 108         subreq = dcerpc_samr_OpenGroup_r_send(s, c->event_ctx,
 109                                               s->pipe->binding_handle,
 110                                               &s->opengroup);
 111         if (composite_nomem(subreq, c)) return;
 112
 113         tevent_req_set_callback(subreq, continue_groupinfo_opengroup, c);
 114 }
 115
 116
 117 /**
 118  * Stage 2: Open group policy handle.
 119  */
 120 static void continue_groupinfo_opengroup(struct tevent_req *subreq)
 121 {
 122         struct composite_context *c;
 123         struct groupinfo_state *s;
 124         struct monitor_msg msg;
 125         struct msg_rpc_open_group *msg_open;
 126
 127         c = tevent_req_callback_data(subreq, struct composite_context);
 128         s = talloc_get_type(c->private_data, struct groupinfo_state);
 129
 130         /* receive samr_OpenGroup reply */
 131         c->status = dcerpc_samr_OpenGroup_r_recv(subreq, s);
 132         TALLOC_FREE(subreq);
 133         if (!composite_is_ok(c)) return;
 134
 135         if (!NT_STATUS_IS_OK(s->opengroup.out.result)) {
 136                 composite_error(c, s->opengroup.out.result);
 137                 return;
 138         }
 139
 140         /* issue a monitor message */
 141         if (s->monitor_fn) {
 142                 msg.type = mon_SamrOpenGroup;
 143                 msg_open = talloc(s, struct msg_rpc_open_group);
 144                 msg_open->rid = s->opengroup.in.rid;
 145                 msg_open->access_mask = s->opengroup.in.access_mask;
 146                 msg.data = (void*)msg_open;
 147                 msg.data_size = sizeof(*msg_open);
 148
 149                 s->monitor_fn(&msg);
 150         }
 151
 152         /* prepare parameters for QueryGroupInfo call */
 153         s->querygroupinfo.in.group_handle = &s->group_handle;
 154         s->querygroupinfo.in.level        = s->level;
 155         s->querygroupinfo.out.info        = talloc(s, union samr_GroupInfo *);
 156         if (composite_nomem(s->querygroupinfo.out.info, c)) return;
 157
 158         /* queue rpc call, set event handling and new state */
 159         subreq = dcerpc_samr_QueryGroupInfo_r_send(s,
 160                                                    c->event_ctx,
 161                                                    s->pipe->binding_handle,
 162                                                    &s->querygroupinfo);
 163         if (composite_nomem(subreq, c)) return;
 164
 165         tevent_req_set_callback(subreq, continue_groupinfo_getgroup, c);
 166 }
 167
 168
 169 /**
 170  * Stage 3: Get requested group information.
 171  */
 172 static void continue_groupinfo_getgroup(struct tevent_req *subreq)
 173 {
 174         struct composite_context *c;
 175         struct groupinfo_state *s;
 176         struct monitor_msg msg;
 177         struct msg_rpc_query_group *msg_query;
 178
 179         c = tevent_req_callback_data(subreq, struct composite_context);
 180         s = talloc_get_type(c->private_data, struct groupinfo_state);
 181
 182         /* receive samr_QueryGroupInfo reply */
 183         c->status = dcerpc_samr_QueryGroupInfo_r_recv(subreq, s);
 184         TALLOC_FREE(subreq);
 185         if (!composite_is_ok(c)) return;
 186
 187         /* check if querygroup itself went ok */
 188         if (!NT_STATUS_IS_OK(s->querygroupinfo.out.result)) {
 189                 composite_error(c, s->querygroupinfo.out.result);
 190                 return;
 191         }
 192
 193         s->info = talloc_steal(s, *s->querygroupinfo.out.info);
 194
 195         /* issue a monitor message */
 196         if (s->monitor_fn) {
 197                 msg.type = mon_SamrQueryGroup;
 198                 msg_query = talloc(s, struct msg_rpc_query_group);
 199                 msg_query->level = s->querygroupinfo.in.level;
 200                 msg.data = (void*)msg_query;
 201                 msg.data_size = sizeof(*msg_query);
 202
 203                 s->monitor_fn(&msg);
 204         }
 205
 206         /* prepare arguments for Close call */
 207         s->samrclose.in.handle  = &s->group_handle;
 208         s->samrclose.out.handle = &s->group_handle;
 209
 210         /* queue rpc call, set event handling and new state */
 211         subreq = dcerpc_samr_Close_r_send(s, c->event_ctx,
 212                                           s->pipe->binding_handle,
 213                                           &s->samrclose);
 214         if (composite_nomem(subreq, c)) return;
 215
 216         tevent_req_set_callback(subreq, continue_groupinfo_closegroup, c);
 217 }
 218
 219
 220 /**
 221  * Stage 4: Close policy handle associated with opened group.
 222  */
 223 static void continue_groupinfo_closegroup(struct tevent_req *subreq)
 224 {
 225         struct composite_context *c;
 226         struct groupinfo_state *s;
 227         struct monitor_msg msg;
 228         struct msg_rpc_close_group *msg_close;
 229
 230         c = tevent_req_callback_data(subreq, struct composite_context);
 231         s = talloc_get_type(c->private_data, struct groupinfo_state);
 232
 233         /* receive samr_Close reply */
 234         c->status = dcerpc_samr_Close_r_recv(subreq, s);
 235         TALLOC_FREE(subreq);
 236         if (!composite_is_ok(c)) return;
 237
 238         if (!NT_STATUS_IS_OK(s->samrclose.out.result)) {
 239                 composite_error(c, s->samrclose.out.result);
 240                 return;
 241         }
 242
 243         /* issue a monitor message */
 244         if (s->monitor_fn) {
 245                 msg.type = mon_SamrClose;
 246                 msg_close = talloc(s, struct msg_rpc_close_group);
 247                 msg_close->rid = s->opengroup.in.rid;
 248                 msg.data = (void*)msg_close;
 249                 msg.data_size = sizeof(*msg_close);
 250
 251                 s->monitor_fn(&msg);
 252         }
 253
 254         composite_done(c);
 255 }
 256
 257
 258 /**
 259  * Sends asynchronous groupinfo request
 260  *
 261  * @param p dce/rpc call pipe
 262  * @param io arguments and results of the call
 263  */
 264 struct composite_context *libnet_rpc_groupinfo_send(struct dcerpc_pipe *p,
 265                                                     TALLOC_CTX *mem_ctx,
 266                                                     struct libnet_rpc_groupinfo *io,
 267                                                     void (*monitor)(struct monitor_msg*))
 268 {
 269         struct composite_context *c;
 270         struct groupinfo_state *s;
 271         struct dom_sid *sid;
 272         struct tevent_req *subreq;
 273
 274         if (!p || !io) return NULL;
 275
 276         c = composite_create(mem_ctx, dcerpc_event_context(p));
 277         if (c == NULL) return c;
 278
 279         s = talloc_zero(c, struct groupinfo_state);
 280         if (composite_nomem(s, c)) return c;
 281
 282         c->private_data = s;
 283
 284         s->level         = io->in.level;
 285         s->pipe          = p;
 286         s->domain_handle = io->in.domain_handle;
 287         s->monitor_fn    = monitor;
 288
 289         if (io->in.sid) {
 290                 sid = dom_sid_parse_talloc(s, io->in.sid);
 291                 if (composite_nomem(sid, c)) return c;
 292
 293                 s->opengroup.in.domain_handle  = &s->domain_handle;
 294                 s->opengroup.in.access_mask    = SEC_FLAG_MAXIMUM_ALLOWED;
 295                 s->opengroup.in.rid            = sid->sub_auths[sid->num_auths - 1];
 296                 s->opengroup.out.group_handle  = &s->group_handle;
 297
 298                 /* send request */
 299                 subreq = dcerpc_samr_OpenGroup_r_send(s, c->event_ctx,
 300                                                       p->binding_handle,
 301                                                       &s->opengroup);
 302                 if (composite_nomem(subreq, c)) return c;
 303
 304                 tevent_req_set_callback(subreq, continue_groupinfo_opengroup, c);
 305
 306         } else {
 307                 /* preparing parameters to send rpc request */
 308                 s->lookup.in.domain_handle    = &s->domain_handle;
 309                 s->lookup.in.num_names        = 1;
 310                 s->lookup.in.names            = talloc_array(s, struct lsa_String, 1);
 311                 if (composite_nomem(s->lookup.in.names, c)) return c;
 312
 313                 s->lookup.in.names[0].string  = talloc_strdup(s, io->in.groupname);
 314                 if (composite_nomem(s->lookup.in.names[0].string, c)) return c;
 315                 s->lookup.out.rids         = talloc_zero(s, struct samr_Ids);
 316                 s->lookup.out.types        = talloc_zero(s, struct samr_Ids);
 317                 if (composite_nomem(s->lookup.out.rids, c)) return c;
 318                 if (composite_nomem(s->lookup.out.types, c)) return c;
 319
 320                 /* send request */
 321                 subreq = dcerpc_samr_LookupNames_r_send(s, c->event_ctx,
 322                                                         p->binding_handle,
 323                                                         &s->lookup);
 324                 if (composite_nomem(subreq, c)) return c;
 325
 326                 tevent_req_set_callback(subreq, continue_groupinfo_lookup, c);
 327         }
 328
 329         return c;
 330 }
 331
 332
 333 /**
 334  * Waits for and receives result of asynchronous groupinfo call
 335  *
 336  * @param c composite context returned by asynchronous groupinfo call
 337  * @param mem_ctx memory context of the call
 338  * @param io pointer to results (and arguments) of the call
 339  * @return nt status code of execution
 340  */
 341
 342 NTSTATUS libnet_rpc_groupinfo_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 343                                    struct libnet_rpc_groupinfo *io)
 344 {
 345         NTSTATUS status;
 346         struct groupinfo_state *s;
 347
 348         /* wait for results of sending request */
 349         status = composite_wait(c);
 350
 351         if (NT_STATUS_IS_OK(status) && io) {
 352                 s = talloc_get_type(c->private_data, struct groupinfo_state);
 353                 talloc_steal(mem_ctx, s->info);
 354                 io->out.info = *s->info;
 355         }
 356
 357         /* memory context associated to composite context is no longer needed */
 358         talloc_free(c);
 359         return status;
 360 }
 361
 362
 363 /**
 364  * Synchronous version of groupinfo call
 365  *
 366  * @param pipe dce/rpc call pipe
 367  * @param mem_ctx memory context for the call
 368  * @param io arguments and results of the call
 369  * @return nt status code of execution
 370  */
 371
 372 NTSTATUS libnet_rpc_groupinfo(struct dcerpc_pipe *p,
 373                               TALLOC_CTX *mem_ctx,
 374                               struct libnet_rpc_groupinfo *io)
 375 {
 376         struct composite_context *c = libnet_rpc_groupinfo_send(p, mem_ctx, io, NULL);
 377         return libnet_rpc_groupinfo_recv(c, mem_ctx, io);
 378 }