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