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_abort(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 == 0) {
  94                 composite_error(c, NT_STATUS_NO_SUCH_USER);
  95                 return;
  96         }
  97
  98         /* TODO: find proper status code for more than one rid found */
  99
 100         /* prepare parameters for LookupNames */
 101         s->openuser.in.domain_handle  = &s->domain_handle;
 102         s->openuser.in.access_mask    = SEC_FLAG_MAXIMUM_ALLOWED;
 103         s->openuser.in.rid            = s->lookup.out.rids->ids[0];
 104         s->openuser.out.user_handle   = &s->user_handle;
 105
 106         /* send request */
 107         subreq = dcerpc_samr_OpenUser_r_send(s, c->event_ctx,
 108                                              s->pipe->binding_handle,
 109                                              &s->openuser);
 110         if (composite_nomem(subreq, c)) return;
 111
 112         tevent_req_set_callback(subreq, continue_userinfo_openuser, c);
 113 }
 114
 115
 116 /**
 117  * Stage 2: Open user policy handle.
 118  */
 119 static void continue_userinfo_openuser(struct tevent_req *subreq)
 120 {
 121         struct composite_context *c;
 122         struct userinfo_state *s;
 123         struct monitor_msg msg;
 124         struct msg_rpc_open_user *msg_open;
 125
 126         c = tevent_req_callback_data(subreq, struct composite_context);
 127         s = talloc_get_type_abort(c->private_data, struct userinfo_state);
 128
 129         /* receive samr_OpenUser reply */
 130         c->status = dcerpc_samr_OpenUser_r_recv(subreq, s);
 131         TALLOC_FREE(subreq);
 132         if (!composite_is_ok(c)) return;
 133
 134         if (!NT_STATUS_IS_OK(s->openuser.out.result)) {
 135                 composite_error(c, s->openuser.out.result);
 136                 return;
 137         }
 138
 139         /* issue a monitor message */
 140         if (s->monitor_fn) {
 141                 msg.type = mon_SamrOpenUser;
 142                 msg_open = talloc(s, struct msg_rpc_open_user);
 143                 msg_open->rid = s->openuser.in.rid;
 144                 msg_open->access_mask = s->openuser.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 QueryUserInfo call */
 152         s->queryuserinfo.in.user_handle = &s->user_handle;
 153         s->queryuserinfo.in.level       = s->level;
 154         s->queryuserinfo.out.info       = talloc(s, union samr_UserInfo *);
 155         if (composite_nomem(s->queryuserinfo.out.info, c)) return;
 156
 157         /* queue rpc call, set event handling and new state */
 158         subreq = dcerpc_samr_QueryUserInfo_r_send(s, c->event_ctx,
 159                                                   s->pipe->binding_handle,
 160                                                   &s->queryuserinfo);
 161         if (composite_nomem(subreq, c)) return;
 162
 163         tevent_req_set_callback(subreq, continue_userinfo_getuser, c);
 164 }
 165
 166
 167 /**
 168  * Stage 3: Get requested user information.
 169  */
 170 static void continue_userinfo_getuser(struct tevent_req *subreq)
 171 {
 172         struct composite_context *c;
 173         struct userinfo_state *s;
 174         struct monitor_msg msg;
 175         struct msg_rpc_query_user *msg_query;
 176
 177         c = tevent_req_callback_data(subreq, struct composite_context);
 178         s = talloc_get_type_abort(c->private_data, struct userinfo_state);
 179
 180         /* receive samr_QueryUserInfo reply */
 181         c->status = dcerpc_samr_QueryUserInfo_r_recv(subreq, s);
 182         TALLOC_FREE(subreq);
 183         if (!composite_is_ok(c)) return;
 184
 185         /* check if queryuser itself went ok */
 186         if (!NT_STATUS_IS_OK(s->queryuserinfo.out.result)) {
 187                 composite_error(c, s->queryuserinfo.out.result);
 188                 return;
 189         }
 190
 191         s->info = talloc_steal(s, *(s->queryuserinfo.out.info));
 192
 193         /* issue a monitor message */
 194         if (s->monitor_fn) {
 195                 msg.type = mon_SamrQueryUser;
 196                 msg_query = talloc(s, struct msg_rpc_query_user);
 197                 msg_query->level = s->queryuserinfo.in.level;
 198                 msg.data = (void*)msg_query;
 199                 msg.data_size = sizeof(*msg_query);
 200
 201                 s->monitor_fn(&msg);
 202         }
 203
 204         /* prepare arguments for Close call */
 205         s->samrclose.in.handle  = &s->user_handle;
 206         s->samrclose.out.handle = &s->user_handle;
 207
 208         /* queue rpc call, set event handling and new state */
 209         subreq = dcerpc_samr_Close_r_send(s, c->event_ctx,
 210                                           s->pipe->binding_handle,
 211                                           &s->samrclose);
 212         if (composite_nomem(subreq, c)) return;
 213
 214         tevent_req_set_callback(subreq, continue_userinfo_closeuser, c);
 215 }
 216
 217
 218 /**
 219  * Stage 4: Close policy handle associated with opened user.
 220  */
 221 static void continue_userinfo_closeuser(struct tevent_req *subreq)
 222 {
 223         struct composite_context *c;
 224         struct userinfo_state *s;
 225         struct monitor_msg msg;
 226         struct msg_rpc_close_user *msg_close;
 227
 228         c = tevent_req_callback_data(subreq, struct composite_context);
 229         s = talloc_get_type_abort(c->private_data, struct userinfo_state);
 230
 231         /* receive samr_Close reply */
 232         c->status = dcerpc_samr_Close_r_recv(subreq, s);
 233         TALLOC_FREE(subreq);
 234         if (!composite_is_ok(c)) return;
 235
 236         if (!NT_STATUS_IS_OK(s->samrclose.out.result)) {
 237                 composite_error(c, s->samrclose.out.result);
 238                 return;
 239         }
 240
 241         /* issue a monitor message */
 242         if (s->monitor_fn) {
 243                 msg.type = mon_SamrClose;
 244                 msg_close = talloc(s, struct msg_rpc_close_user);
 245                 msg_close->rid = s->openuser.in.rid;
 246                 msg.data = (void*)msg_close;
 247                 msg.data_size = sizeof(*msg_close);
 248
 249                 s->monitor_fn(&msg);
 250         }
 251
 252         composite_done(c);
 253 }
 254
 255
 256 /**
 257  * Sends asynchronous userinfo request
 258  *
 259  * @param p dce/rpc call pipe
 260  * @param io arguments and results of the call
 261  */
 262 struct composite_context *libnet_rpc_userinfo_send(struct dcerpc_pipe *p,
 263                                                    TALLOC_CTX *mem_ctx,
 264                                                    struct libnet_rpc_userinfo *io,
 265                                                    void (*monitor)(struct monitor_msg*))
 266 {
 267         struct composite_context *c;
 268         struct userinfo_state *s;
 269         struct dom_sid *sid;
 270         struct tevent_req *subreq;
 271
 272         if (!p || !io) return NULL;
 273
 274         c = composite_create(mem_ctx, dcerpc_event_context(p));
 275         if (c == NULL) return c;
 276
 277         s = talloc_zero(c, struct userinfo_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->openuser.in.domain_handle  = &s->domain_handle;
 292                 s->openuser.in.access_mask    = SEC_FLAG_MAXIMUM_ALLOWED;
 293                 s->openuser.in.rid            = sid->sub_auths[sid->num_auths - 1];
 294                 s->openuser.out.user_handle   = &s->user_handle;
 295
 296                 /* send request */
 297                 subreq = dcerpc_samr_OpenUser_r_send(s, c->event_ctx,
 298                                                      p->binding_handle,
 299                                                      &s->openuser);
 300                 if (composite_nomem(subreq, c)) return c;
 301
 302                 tevent_req_set_callback(subreq, continue_userinfo_openuser, 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                 s->lookup.out.rids         = talloc_zero(s, struct samr_Ids);
 311                 s->lookup.out.types        = talloc_zero(s, struct samr_Ids);
 312                 if (composite_nomem(s->lookup.out.rids, c)) return c;
 313                 if (composite_nomem(s->lookup.out.types, c)) return c;
 314
 315                 s->lookup.in.names[0].string  = talloc_strdup(s, io->in.username);
 316                 if (composite_nomem(s->lookup.in.names[0].string, 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_userinfo_lookup, c);
 325         }
 326
 327         return c;
 328 }
 329
 330
 331 /**
 332  * Waits for and receives result of asynchronous userinfo call
 333  *
 334  * @param c composite context returned by asynchronous userinfo 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_userinfo_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 341                                   struct libnet_rpc_userinfo *io)
 342 {
 343         NTSTATUS status;
 344         struct userinfo_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_abort(c->private_data, struct userinfo_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 userinfo 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_userinfo(struct dcerpc_pipe *p,
 371                              TALLOC_CTX *mem_ctx,
 372                              struct libnet_rpc_userinfo *io)
 373 {
 374         struct composite_context *c = libnet_rpc_userinfo_send(p, mem_ctx, io, NULL);
 375         return libnet_rpc_userinfo_recv(c, mem_ctx, io);
 376 }