source4/lib/registry/rpc.c

   1 /*
   2    Samba Unix/Linux SMB implementation
   3    RPC backend for the registry library
   4    Copyright (C) 2003-2007 Jelmer Vernooij, jelmer@samba.org
   5    Copyright (C) 2008 Matthias Dieter Wallnöfer, mwallnoefer@yahoo.de
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "includes.h"
  21 #include "registry.h"
  22 #include "librpc/gen_ndr/ndr_winreg_c.h"
  23
  24 #define MAX_NAMESIZE 512
  25 #define MAX_VALSIZE 32768
  26
  27 struct rpc_key {
  28         struct registry_key key;
  29         struct policy_handle pol;
  30         struct dcerpc_binding_handle *binding_handle;
  31         const char* classname;
  32         uint32_t num_subkeys;
  33         uint32_t max_subkeylen;
  34         uint32_t max_classlen;
  35         uint32_t num_values;
  36         uint32_t max_valnamelen;
  37         uint32_t max_valbufsize;
  38         uint32_t secdescsize;
  39         NTTIME last_changed_time;
  40 };
  41
  42 struct rpc_registry_context {
  43         struct registry_context context;
  44         struct dcerpc_pipe *pipe;
  45         struct dcerpc_binding_handle *binding_handle;
  46 };
  47
  48 static struct registry_operations reg_backend_rpc;
  49
  50 /**
  51  * This is the RPC backend for the registry library.
  52  */
  53
  54 #define openhive(u) static WERROR open_ ## u(struct dcerpc_binding_handle *b, TALLOC_CTX *mem_ctx, struct policy_handle *hnd) \
  55 { \
  56         struct winreg_Open ## u r; \
  57         NTSTATUS status; \
  58 \
  59         ZERO_STRUCT(r); \
  60         r.in.system_name = NULL; \
  61         r.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED; \
  62         r.out.handle = hnd;\
  63 \
  64         status = dcerpc_winreg_Open ## u ## _r(b, mem_ctx, &r); \
  65 \
  66         if (!NT_STATUS_IS_OK(status)) { \
  67                 DEBUG(1, ("OpenHive failed - %s\n", nt_errstr(status))); \
  68                 return ntstatus_to_werror(status); \
  69         } \
  70 \
  71         return r.out.result;\
  72 }
  73
  74 openhive(HKLM)
  75 openhive(HKCU)
  76 openhive(HKPD)
  77 openhive(HKU)
  78 openhive(HKCR)
  79 openhive(HKDD)
  80 openhive(HKCC)
  81
  82 static struct {
  83         uint32_t hkey;
  84         WERROR (*open) (struct dcerpc_binding_handle *b, TALLOC_CTX *,
  85                         struct policy_handle *h);
  86 } known_hives[] = {
  87         { HKEY_LOCAL_MACHINE, open_HKLM },
  88         { HKEY_CURRENT_USER, open_HKCU },
  89         { HKEY_CLASSES_ROOT, open_HKCR },
  90         { HKEY_PERFORMANCE_DATA, open_HKPD },
  91         { HKEY_USERS, open_HKU },
  92         { HKEY_DYN_DATA, open_HKDD },
  93         { HKEY_CURRENT_CONFIG, open_HKCC },
  94         { 0, NULL }
  95 };
  96
  97 static WERROR rpc_query_key(TALLOC_CTX *mem_ctx, const struct registry_key *k);
  98
  99 static WERROR rpc_get_predefined_key(struct registry_context *ctx,
 100                                      uint32_t hkey_type,
 101                                      struct registry_key **k)
 102 {
 103         int n;
 104         struct rpc_key *mykeydata;
 105         struct rpc_registry_context *rctx = talloc_get_type(ctx, struct rpc_registry_context);
 106
 107         *k = NULL;
 108
 109         for(n = 0; known_hives[n].hkey; n++) {
 110                 if(known_hives[n].hkey == hkey_type)
 111                         break;
 112         }
 113
 114         if (known_hives[n].open == NULL)  {
 115                 DEBUG(1, ("No such hive %d\n", hkey_type));
 116                 return WERR_NO_MORE_ITEMS;
 117         }
 118
 119         mykeydata = talloc_zero(ctx, struct rpc_key);
 120         W_ERROR_HAVE_NO_MEMORY(mykeydata);
 121         mykeydata->key.context = ctx;
 122         mykeydata->binding_handle = rctx->binding_handle;
 123         mykeydata->num_values = -1;
 124         mykeydata->num_subkeys = -1;
 125         *k = (struct registry_key *)mykeydata;
 126         return known_hives[n].open(mykeydata->binding_handle, mykeydata, &mykeydata->pol);
 127 }
 128
 129 #if 0
 130 static WERROR rpc_key_put_rpc_data(TALLOC_CTX *mem_ctx, struct registry_key *k)
 131 {
 132         struct winreg_OpenKey r;
 133         struct rpc_key_data *mykeydata;
 134
 135         k->backend_data = mykeydata = talloc_zero(mem_ctx, struct rpc_key_data);
 136         mykeydata->num_values = -1;
 137         mykeydata->num_subkeys = -1;
 138
 139         /* Then, open the handle using the hive */
 140
 141         ZERO_STRUCT(r);
 142         r.in.handle = &(((struct rpc_key_data *)k->hive->root->backend_data)->pol);
 143         r.in.keyname.name = k->path;
 144         r.in.unknown = 0x00000000;
 145         r.in.access_mask = 0x02000000;
 146         r.out.handle = &mykeydata->pol;
 147
 148         dcerpc_winreg_OpenKey((struct dcerpc_pipe *)k->hive->backend_data,
 149                               mem_ctx, &r);
 150
 151         return r.out.result;
 152 }
 153 #endif
 154
 155 static WERROR rpc_open_key(TALLOC_CTX *mem_ctx, struct registry_key *h,
 156                            const char *name, struct registry_key **key)
 157 {
 158         struct rpc_key *parentkeydata = talloc_get_type(h, struct rpc_key),
 159                                                     *mykeydata;
 160         struct winreg_OpenKey r;
 161         NTSTATUS status;
 162
 163         mykeydata = talloc_zero(mem_ctx, struct rpc_key);
 164         W_ERROR_HAVE_NO_MEMORY(mykeydata);
 165         mykeydata->key.context = parentkeydata->key.context;
 166         mykeydata->binding_handle = parentkeydata->binding_handle;
 167         mykeydata->num_values = -1;
 168         mykeydata->num_subkeys = -1;
 169         *key = (struct registry_key *)mykeydata;
 170
 171         /* Then, open the handle using the hive */
 172         ZERO_STRUCT(r);
 173         r.in.parent_handle = &parentkeydata->pol;
 174         r.in.keyname.name = name;
 175         r.in.options = 0x00000000;
 176         r.in.access_mask = 0x02000000;
 177         r.out.handle = &mykeydata->pol;
 178
 179         status = dcerpc_winreg_OpenKey_r(mykeydata->binding_handle, mem_ctx, &r);
 180
 181         if (!NT_STATUS_IS_OK(status)) {
 182                 DEBUG(1, ("OpenKey failed - %s\n", nt_errstr(status)));
 183                 return ntstatus_to_werror(status);
 184         }
 185
 186         return r.out.result;
 187 }
 188
 189 static WERROR rpc_get_value_by_index(TALLOC_CTX *mem_ctx,
 190                                      const struct registry_key *parent,
 191                                      uint32_t n,
 192                                      const char **value_name,
 193                                      uint32_t *type,
 194                                      DATA_BLOB *data)
 195 {
 196         struct rpc_key *mykeydata = talloc_get_type(parent, struct rpc_key);
 197         struct winreg_EnumValue r;
 198         struct winreg_ValNameBuf name;
 199         uint8_t value;
 200         uint32_t val_size = MAX_VALSIZE;
 201         uint32_t zero = 0;
 202         WERROR error;
 203         NTSTATUS status;
 204
 205         if (mykeydata->num_values == -1) {
 206                 error = rpc_query_key(mem_ctx, parent);
 207                 if(!W_ERROR_IS_OK(error)) return error;
 208         }
 209
 210         name.name = "";
 211         name.size = MAX_NAMESIZE;
 212
 213         ZERO_STRUCT(r);
 214         r.in.handle = &mykeydata->pol;
 215         r.in.enum_index = n;
 216         r.in.name = &name;
 217         r.in.type = (enum winreg_Type *) type;
 218         r.in.value = &value;
 219         r.in.size = &val_size;
 220         r.in.length = &zero;
 221         r.out.name = &name;
 222         r.out.type = (enum winreg_Type *) type;
 223         r.out.value = &value;
 224         r.out.size = &val_size;
 225         r.out.length = &zero;
 226
 227         status = dcerpc_winreg_EnumValue_r(mykeydata->binding_handle, mem_ctx, &r);
 228
 229         if (!NT_STATUS_IS_OK(status)) {
 230                 DEBUG(1, ("EnumValue failed - %s\n", nt_errstr(status)));
 231                 return ntstatus_to_werror(status);
 232         }
 233
 234         *value_name = talloc_steal(mem_ctx, r.out.name->name);
 235         *type = *(r.out.type);
 236         *data = data_blob_talloc(mem_ctx, r.out.value, *r.out.length);
 237
 238         return r.out.result;
 239 }
 240
 241 static WERROR rpc_get_value_by_name(TALLOC_CTX *mem_ctx,
 242                                      const struct registry_key *parent,
 243                                      const char *value_name,
 244                                      uint32_t *type,
 245                                      DATA_BLOB *data)
 246 {
 247         struct rpc_key *mykeydata = talloc_get_type(parent, struct rpc_key);
 248         struct winreg_QueryValue r;
 249         struct winreg_String name;
 250         uint8_t value;
 251         uint32_t val_size = MAX_VALSIZE;
 252         uint32_t zero = 0;
 253         WERROR error;
 254         NTSTATUS status;
 255
 256         if (mykeydata->num_values == -1) {
 257                 error = rpc_query_key(mem_ctx, parent);
 258                 if(!W_ERROR_IS_OK(error)) return error;
 259         }
 260
 261         name.name = value_name;
 262
 263         ZERO_STRUCT(r);
 264         r.in.handle = &mykeydata->pol;
 265         r.in.value_name = &name;
 266         r.in.type = (enum winreg_Type *) type;
 267         r.in.data = &value;
 268         r.in.data_size = &val_size;
 269         r.in.data_length = &zero;
 270         r.out.type = (enum winreg_Type *) type;
 271         r.out.data = &value;
 272         r.out.data_size = &val_size;
 273         r.out.data_length = &zero;
 274
 275         status = dcerpc_winreg_QueryValue_r(mykeydata->binding_handle, mem_ctx, &r);
 276
 277         if (!NT_STATUS_IS_OK(status)) {
 278                 DEBUG(1, ("QueryValue failed - %s\n", nt_errstr(status)));
 279                 return ntstatus_to_werror(status);
 280         }
 281
 282         *type = *(r.out.type);
 283         *data = data_blob_talloc(mem_ctx, r.out.data, *r.out.data_length);
 284
 285         return r.out.result;
 286 }
 287
 288 static WERROR rpc_set_value(struct registry_key *key, const char *value_name,
 289                             uint32_t type, const DATA_BLOB data)
 290 {
 291         struct rpc_key *mykeydata = talloc_get_type(key, struct rpc_key);
 292         struct winreg_SetValue r;
 293         struct winreg_String name;
 294         NTSTATUS status;
 295
 296         name = (struct winreg_String) { .name = value_name };
 297
 298         ZERO_STRUCT(r);
 299         r.in.handle = &mykeydata->pol;
 300         r.in.name = name;
 301         r.in.type = (enum winreg_Type)type;
 302         r.in.data = data.data;
 303         r.in.size = data.length;
 304
 305         status = dcerpc_winreg_SetValue_r(mykeydata->binding_handle, key, &r);
 306         if (!NT_STATUS_IS_OK(status)) {
 307                 DEBUG(1, ("SetValue failed - %s\n", nt_errstr(status)));
 308                 return ntstatus_to_werror(status);
 309         }
 310
 311         return r.out.result;
 312 }
 313
 314 static WERROR rpc_del_value(TALLOC_CTX *mem_ctx, struct registry_key *key,
 315                             const char *value_name)
 316 {
 317         struct rpc_key *mykeydata = talloc_get_type(key, struct rpc_key);
 318         struct winreg_DeleteValue r;
 319         struct winreg_String name;
 320         NTSTATUS status;
 321
 322         name = (struct winreg_String) { .name = value_name };
 323
 324         ZERO_STRUCT(r);
 325         r.in.handle = &mykeydata->pol;
 326         r.in.value = name;
 327
 328         status = dcerpc_winreg_DeleteValue_r(mykeydata->binding_handle,
 329                                              mem_ctx, &r);
 330         if (!NT_STATUS_IS_OK(status)) {
 331                 DEBUG(1, ("DeleteValue failed - %s\n", nt_errstr(status)));
 332                 return ntstatus_to_werror(status);
 333         }
 334
 335         return r.out.result;
 336 }
 337
 338 static WERROR rpc_get_subkey_by_index(TALLOC_CTX *mem_ctx,
 339                                       const struct registry_key *parent,
 340                                       uint32_t n,
 341                                       const char **name,
 342                                       const char **keyclass,
 343                                       NTTIME *last_changed_time)
 344 {
 345         struct winreg_EnumKey r;
 346         struct rpc_key *mykeydata = talloc_get_type(parent, struct rpc_key);
 347         struct winreg_StringBuf namebuf, classbuf;
 348         NTTIME change_time = 0;
 349         NTSTATUS status;
 350
 351         namebuf.name = "";
 352         namebuf.size = MAX_NAMESIZE;
 353         classbuf.name = NULL;
 354         classbuf.size = 0;
 355
 356         ZERO_STRUCT(r);
 357         r.in.handle = &mykeydata->pol;
 358         r.in.enum_index = n;
 359         r.in.name = &namebuf;
 360         r.in.keyclass = &classbuf;
 361         r.in.last_changed_time = &change_time;
 362         r.out.name = &namebuf;
 363         r.out.keyclass = &classbuf;
 364         r.out.last_changed_time = &change_time;
 365
 366         status = dcerpc_winreg_EnumKey_r(mykeydata->binding_handle, mem_ctx, &r);
 367
 368         if (!NT_STATUS_IS_OK(status)) {
 369                 DEBUG(1, ("EnumKey failed - %s\n", nt_errstr(status)));
 370                 return ntstatus_to_werror(status);
 371         }
 372
 373         if (name != NULL)
 374                 *name = talloc_steal(mem_ctx, r.out.name->name);
 375         if (keyclass != NULL)
 376                 *keyclass = talloc_steal(mem_ctx, r.out.keyclass->name);
 377         if (last_changed_time != NULL)
 378                 *last_changed_time = *(r.out.last_changed_time);
 379
 380         return r.out.result;
 381 }
 382
 383 static WERROR rpc_add_key(TALLOC_CTX *mem_ctx,
 384                           struct registry_key *parent, const char *path,
 385                           const char *key_class,
 386                           struct security_descriptor *sec,
 387                           struct registry_key **key)
 388 {
 389         struct winreg_CreateKey r;
 390         struct rpc_key *parentkd = talloc_get_type(parent, struct rpc_key);
 391         struct rpc_key *rpck = talloc_zero(mem_ctx, struct rpc_key);
 392
 393         NTSTATUS status;
 394
 395         if (rpck == NULL) {
 396                 return WERR_NOT_ENOUGH_MEMORY;
 397         }
 398
 399         rpck->key.context = parentkd->key.context;
 400         rpck->binding_handle = parentkd->binding_handle;
 401         rpck->num_values = -1;
 402         rpck->num_subkeys = -1;
 403
 404         ZERO_STRUCT(r);
 405         r.in.handle = &parentkd->pol;
 406         r.in.name.name = path;
 407         r.in.keyclass.name = NULL;
 408         r.in.options = 0;
 409         r.in.access_mask = 0x02000000;
 410         r.in.secdesc = NULL;
 411         r.in.action_taken = NULL;
 412         r.out.new_handle = &rpck->pol;
 413         r.out.action_taken = NULL;
 414
 415         status = dcerpc_winreg_CreateKey_r(parentkd->binding_handle, mem_ctx, &r);
 416
 417         if (!NT_STATUS_IS_OK(status)) {
 418                 talloc_free(rpck);
 419                 DEBUG(1, ("CreateKey failed - %s\n", nt_errstr(status)));
 420                 return ntstatus_to_werror(status);
 421         }
 422
 423         rpck->binding_handle = parentkd->binding_handle;
 424         *key = (struct registry_key *)rpck;
 425
 426         return r.out.result;
 427 }
 428
 429 static WERROR rpc_query_key(TALLOC_CTX *mem_ctx, const struct registry_key *k)
 430 {
 431         struct winreg_QueryInfoKey r;
 432         struct rpc_key *mykeydata = talloc_get_type(k, struct rpc_key);
 433         struct winreg_String classname;
 434         NTSTATUS status;
 435
 436         classname.name = NULL;
 437
 438         ZERO_STRUCT(r);
 439         r.in.handle = &mykeydata->pol;
 440         r.in.classname = &classname;
 441         r.out.classname = &classname;
 442         r.out.num_subkeys = &mykeydata->num_subkeys;
 443         r.out.max_subkeylen = &mykeydata->max_subkeylen;
 444         r.out.max_classlen = &mykeydata->max_classlen;
 445         r.out.num_values = &mykeydata->num_values;
 446         r.out.max_valnamelen = &mykeydata->max_valnamelen;
 447         r.out.max_valbufsize = &mykeydata->max_valbufsize;
 448         r.out.secdescsize = &mykeydata->secdescsize;
 449         r.out.last_changed_time = &mykeydata->last_changed_time;
 450
 451         status = dcerpc_winreg_QueryInfoKey_r(mykeydata->binding_handle, mem_ctx, &r);
 452
 453         if (!NT_STATUS_IS_OK(status)) {
 454                 DEBUG(1, ("QueryInfoKey failed - %s\n", nt_errstr(status)));
 455                 return ntstatus_to_werror(status);
 456         }
 457
 458         mykeydata->classname = talloc_steal(mem_ctx, r.out.classname->name);
 459
 460         return r.out.result;
 461 }
 462
 463 static WERROR rpc_del_key(TALLOC_CTX *mem_ctx, struct registry_key *parent,
 464                           const char *name)
 465 {
 466         NTSTATUS status;
 467         struct rpc_key *mykeydata = talloc_get_type(parent, struct rpc_key);
 468         struct winreg_DeleteKey r;
 469
 470         ZERO_STRUCT(r);
 471         r.in.handle = &mykeydata->pol;
 472         r.in.key.name = name;
 473
 474         status = dcerpc_winreg_DeleteKey_r(mykeydata->binding_handle, mem_ctx, &r);
 475
 476         if (!NT_STATUS_IS_OK(status)) {
 477                 DEBUG(1, ("DeleteKey failed - %s\n", nt_errstr(status)));
 478                 return ntstatus_to_werror(status);
 479         }
 480
 481         return r.out.result;
 482 }
 483
 484 static WERROR rpc_get_info(TALLOC_CTX *mem_ctx, const struct registry_key *key,
 485                                                    const char **classname,
 486                                                    uint32_t *num_subkeys,
 487                                                    uint32_t *num_values,
 488                                                    NTTIME *last_changed_time,
 489                                                    uint32_t *max_subkeylen,
 490                                                    uint32_t *max_valnamelen,
 491                                                    uint32_t *max_valbufsize)
 492 {
 493         struct rpc_key *mykeydata = talloc_get_type(key, struct rpc_key);
 494         WERROR error;
 495
 496         if (mykeydata->num_values == -1) {
 497                 error = rpc_query_key(mem_ctx, key);
 498                 if(!W_ERROR_IS_OK(error)) return error;
 499         }
 500
 501         if (classname != NULL)
 502                 *classname = mykeydata->classname;
 503
 504         if (num_subkeys != NULL)
 505                 *num_subkeys = mykeydata->num_subkeys;
 506
 507         if (num_values != NULL)
 508                 *num_values = mykeydata->num_values;
 509
 510         if (last_changed_time != NULL)
 511                 *last_changed_time = mykeydata->last_changed_time;
 512
 513         if (max_subkeylen != NULL)
 514                 *max_subkeylen = mykeydata->max_subkeylen;
 515
 516         if (max_valnamelen != NULL)
 517                 *max_valnamelen = mykeydata->max_valnamelen;
 518
 519         if (max_valbufsize != NULL)
 520                 *max_valbufsize = mykeydata->max_valbufsize;
 521
 522         return WERR_OK;
 523 }
 524
 525 static struct registry_operations reg_backend_rpc = {
 526         .name = "rpc",
 527         .open_key = rpc_open_key,
 528         .get_predefined_key = rpc_get_predefined_key,
 529         .enum_key = rpc_get_subkey_by_index,
 530         .enum_value = rpc_get_value_by_index,
 531         .get_value = rpc_get_value_by_name,
 532         .set_value = rpc_set_value,
 533         .delete_value = rpc_del_value,
 534         .create_key = rpc_add_key,
 535         .delete_key = rpc_del_key,
 536         .get_key_info = rpc_get_info,
 537 };
 538
 539 _PUBLIC_ WERROR reg_open_remote(TALLOC_CTX *mem_ctx,
 540                                 struct registry_context **ctx,
 541                                 struct auth_session_info *session_info,
 542                                 struct cli_credentials *credentials,
 543                                 struct loadparm_context *lp_ctx,
 544                                 const char *location, struct tevent_context *ev)
 545 {
 546         NTSTATUS status;
 547         struct dcerpc_pipe *p;
 548         struct rpc_registry_context *rctx;
 549
 550         dcerpc_init();
 551
 552         rctx = talloc(mem_ctx, struct rpc_registry_context);
 553         W_ERROR_HAVE_NO_MEMORY(rctx);
 554
 555         /* Default to local smbd if no connection is specified */
 556         if (!location) {
 557                 location = talloc_strdup(rctx, "ncalrpc:");
 558         }
 559
 560         status = dcerpc_pipe_connect(rctx /* TALLOC_CTX */,
 561                                      &p, location,
 562                                      &ndr_table_winreg,
 563                                      credentials, ev, lp_ctx);
 564         if(NT_STATUS_IS_ERR(status)) {
 565                 DEBUG(1, ("Unable to open '%s': %s\n", location,
 566                         nt_errstr(status)));
 567                 talloc_free(rctx);
 568                 *ctx = NULL;
 569                 return ntstatus_to_werror(status);
 570         }
 571
 572         rctx->pipe = p;
 573         rctx->binding_handle = p->binding_handle;
 574
 575         *ctx = (struct registry_context *)rctx;
 576         (*ctx)->ops = &reg_backend_rpc;
 577
 578         return WERR_OK;
 579 }