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