source3/utils/smbcacls.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    ACL get/set utility
   4    Version 3.0
   5
   6    Copyright (C) Andrew Tridgell 2000
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24
  25 static fstring password;
  26 static fstring username;
  27 static int got_pass;
  28
  29 /* numeric is set when the user wants numeric SIDs and ACEs rather
  30    than going via LSA calls to resolve them */
  31 static int numeric;
  32
  33 enum acl_mode {ACL_SET, ACL_DELETE, ACL_MODIFY, ACL_ADD};
  34
  35 struct perm_value {
  36         char *perm;
  37         uint32 mask;
  38 };
  39
  40 /* These values discovered by inspection */
  41
  42 static struct perm_value special_values[] = {
  43         { "R", 0x00120089 },
  44         { "W", 0x00120116 },
  45         { "X", 0x001200a0 },
  46         { "D", 0x00010000 },
  47         { "P", 0x00040000 },
  48         { "O", 0x00080000 },
  49         { NULL, 0 },
  50 };
  51
  52 static struct perm_value standard_values[] = {
  53         { "READ",   0x001200a9 },
  54         { "CHANGE", 0x001301bf },
  55         { "FULL",   0x001f01ff },
  56         { NULL, 0 },
  57 };
  58
  59 /* convert a SID to a string, either numeric or username/group */
  60 static void SidToString(fstring str, DOM_SID *sid)
  61 {
  62         if (numeric) {
  63                 sid_to_string(str, sid);
  64         } else {
  65
  66                 /* Need to add LSA lookups */
  67
  68                 sid_to_string(str, sid);
  69         }
  70 }
  71
  72 /* convert a string to a SID, either numeric or username/group */
  73 static BOOL StringToSid(DOM_SID *sid, fstring str)
  74 {
  75         if (strncmp(str,"S-", 2) == 0) {
  76                 return string_to_sid(sid, str);
  77         } else {
  78
  79                 /* Need to add LSA lookups */
  80
  81                 return string_to_sid(sid, str);
  82         }
  83 }
  84
  85
  86 /* print an ACE on a FILE, using either numeric or ascii representation */
  87 static void print_ace(FILE *f, SEC_ACE *ace)
  88 {
  89         struct perm_value *v;
  90         fstring sidstr;
  91
  92         SidToString(sidstr, &ace->sid);
  93
  94         fprintf(f, "%s:", sidstr);
  95
  96         if (numeric) {
  97                 fprintf(f, "%d/%d/0x%08x\n",
  98                         ace->type, ace->flags, ace->info.mask);
  99                 return;
 100         }
 101
 102         /* Ace type */
 103
 104         if (ace->type == SEC_ACE_TYPE_ACCESS_ALLOWED) {
 105                 fprintf(f, "ALLOWED");
 106         } else if (ace->type == SEC_ACE_TYPE_ACCESS_DENIED) {
 107                 fprintf(f, "DENIED");
 108         } else {
 109                 fprintf(f, "%d", ace->type);
 110         }
 111
 112         /* Not sure what flags can be set in a file ACL */
 113
 114         fprintf(f, "/%d/", ace->flags);
 115
 116         /* Standard permissions */
 117
 118         for (v = standard_values; v->perm; v++) {
 119                 if (ace->info.mask == v->mask) {
 120                         fprintf(f, "%s\n", v->perm);
 121                         return;
 122                 }
 123         }
 124
 125         /* Special permissions */
 126
 127         for (v = special_values; v->perm; v++) {
 128                 if ((ace->info.mask & v->mask) == v->mask) {
 129                         fprintf(f, "%s", v->perm);
 130                 }
 131         }
 132
 133         fprintf(f, "\n");
 134 }
 135
 136
 137 /* parse an ACE in the same format as print_ace() */
 138 static BOOL parse_ace(SEC_ACE *ace, char *str)
 139 {
 140         char *p;
 141         unsigned atype, aflags, amask;
 142         DOM_SID sid;
 143         SEC_ACCESS mask;
 144         ZERO_STRUCTP(ace);
 145         p = strchr(str,':');
 146         if (!p) return False;
 147         *p = 0;
 148         if (sscanf(p+1, "%x/%x/%08x",
 149                    &atype, &aflags, &amask) != 3 ||
 150             !StringToSid(&sid, str)) {
 151                 return False;
 152         }
 153         mask.mask = amask;
 154         init_sec_ace(ace, &sid, atype, mask, aflags);
 155         return True;
 156 }
 157
 158 /* add an ACE to a list of ACEs in a SEC_ACL */
 159 static BOOL add_ace(SEC_ACL **acl, SEC_ACE *ace)
 160 {
 161         SEC_ACL *new;
 162         SEC_ACE *aces;
 163         if (! *acl) {
 164                 (*acl) = make_sec_acl(3, 1, ace);
 165                 return True;
 166         }
 167
 168         aces = calloc(1+(*acl)->num_aces,sizeof(SEC_ACE));
 169         memcpy(aces, (*acl)->ace, (*acl)->num_aces * sizeof(SEC_ACE));
 170         memcpy(aces+(*acl)->num_aces, ace, sizeof(SEC_ACE));
 171         new = make_sec_acl((*acl)->revision,1+(*acl)->num_aces, aces);
 172         free_sec_acl(acl);
 173         free(aces);
 174         (*acl) = new;
 175         return True;
 176 }
 177
 178 /* parse a ascii version of a security descriptor */
 179 static SEC_DESC *sec_desc_parse(char *str)
 180 {
 181         char *p = str;
 182         fstring tok;
 183         SEC_DESC *ret;
 184         unsigned sd_size;
 185         DOM_SID *grp_sid=NULL, *owner_sid=NULL;
 186         SEC_ACL *dacl=NULL;
 187         int revision=1;
 188         int type=0x8004;
 189
 190         while (next_token(&p, tok, " \t,\r\n", sizeof(tok))) {
 191
 192                 if (strncmp(tok,"REVISION:", 9) == 0) {
 193                         revision = strtol(tok+9, NULL, 16);
 194                 }
 195
 196                 if (strncmp(tok,"TYPE:", 5) == 0) {
 197                         type = strtol(tok+5, NULL, 16);
 198                 }
 199
 200                 if (strncmp(tok,"OWNER:", 6) == 0) {
 201                         owner_sid = (DOM_SID *)calloc(1, sizeof(DOM_SID));
 202                         if (!owner_sid ||
 203                             !StringToSid(owner_sid, tok+6)) {
 204                                 printf("Failed to parse owner sid\n");
 205                                 return NULL;
 206                         }
 207                 }
 208
 209                 if (strncmp(tok,"GROUP:", 6) == 0) {
 210                         grp_sid = (DOM_SID *)calloc(1, sizeof(DOM_SID));
 211                         if (!grp_sid ||
 212                             !StringToSid(grp_sid, tok+6)) {
 213                                 printf("Failed to parse group sid\n");
 214                                 return NULL;
 215                         }
 216                 }
 217
 218                 if (strncmp(tok,"ACL:", 4) == 0) {
 219                         SEC_ACE ace;
 220                         if (!parse_ace(&ace, tok+4) ||
 221                             !add_ace(&dacl, &ace)) {
 222                                 printf("Failed to parse ACL\n");
 223                                 return NULL;
 224                         }
 225                 }
 226         }
 227
 228         ret = make_sec_desc(revision, owner_sid, grp_sid,
 229                             NULL, dacl, &sd_size);
 230
 231         free_sec_acl(&dacl);
 232         if (grp_sid) free(grp_sid);
 233         if (owner_sid) free(owner_sid);
 234
 235         return ret;
 236 }
 237
 238
 239 /* print a ascii version of a security descriptor on a FILE handle */
 240 static void sec_desc_print(FILE *f, SEC_DESC *sd)
 241 {
 242         fstring sidstr;
 243         int i;
 244
 245         printf("REVISION:%d\nTYPE:0x%x\n", sd->revision, sd->type);
 246
 247         /* Print owner and group sid */
 248
 249         if (sd->owner_sid) {
 250                 SidToString(sidstr, sd->owner_sid);
 251         } else {
 252                 fstrcpy(sidstr, "");
 253         }
 254
 255         printf("OWNER:%s\n", sidstr);
 256
 257         if (sd->grp_sid) {
 258                 SidToString(sidstr, sd->grp_sid);
 259         } else {
 260                 fstrcpy(sidstr, "");
 261         }
 262
 263         fprintf(f, "GROUP:%s\n", sidstr);
 264
 265         /* Print aces */
 266         for (i = 0; sd->dacl && i < sd->dacl->num_aces; i++) {
 267                 SEC_ACE *ace = &sd->dacl->ace[i];
 268                 fprintf(f, "ACL:");
 269                 print_ace(f, ace);
 270         }
 271
 272 }
 273
 274
 275 /*****************************************************
 276 dump the acls for a file
 277 *******************************************************/
 278 static void cacl_dump(struct cli_state *cli, char *filename)
 279 {
 280         int fnum;
 281         SEC_DESC *sd;
 282
 283         fnum = cli_nt_create(cli, filename);
 284         if (fnum == -1) {
 285                 printf("Failed to open %s: %s\n", filename, cli_errstr(cli));
 286                 return;
 287         }
 288
 289         sd = cli_query_secdesc(cli, fnum);
 290
 291         if (!sd) {
 292                 printf("ERROR: secdesc query failed: %s\n", cli_errstr(cli));
 293                 return;
 294         }
 295
 296         sec_desc_print(stdout, sd);
 297
 298         free_sec_desc(&sd);
 299
 300         cli_close(cli, fnum);
 301 }
 302
 303 /*****************************************************
 304 set the ACLs on a file given an ascii description
 305 *******************************************************/
 306 static void cacl_set(struct cli_state *cli, char *filename,
 307                      char *acl, enum acl_mode mode)
 308 {
 309         int fnum;
 310         SEC_DESC *sd, *old;
 311         int i, j;
 312         unsigned sd_size;
 313
 314         sd = sec_desc_parse(acl);
 315         if (!sd) {
 316                 printf("Failed to parse security descriptor\n");
 317                 return;
 318         }
 319
 320         fnum = cli_nt_create(cli, filename);
 321         if (fnum == -1) {
 322                 printf("Failed to open %s: %s\n", filename, cli_errstr(cli));
 323                 return;
 324         }
 325
 326         old = cli_query_secdesc(cli, fnum);
 327
 328         /* the logic here is rather more complex than I would like */
 329         switch (mode) {
 330         case ACL_DELETE:
 331                 for (i=0;sd->dacl && i<sd->dacl->num_aces;i++) {
 332                         for (j=0;old->dacl && j<old->dacl->num_aces;j++) {
 333                                 if (sec_ace_equal(&sd->dacl->ace[i],
 334                                                   &old->dacl->ace[j])) {
 335                                         if (j != old->dacl->num_aces-1) {
 336                                                 old->dacl->ace[j] = old->dacl->ace[j+1];
 337                                         }
 338                                         old->dacl->num_aces--;
 339                                         if (old->dacl->num_aces == 0) {
 340                                                 free(old->dacl->ace);
 341                                                 old->dacl->ace=NULL;
 342                                                 free(old->dacl);
 343                                                 old->dacl = NULL;
 344                                                 old->off_dacl = 0;
 345                                         }
 346                                         break;
 347                                 }
 348                         }
 349                 }
 350                 break;
 351
 352         case ACL_MODIFY:
 353                 for (i=0;sd->dacl && i<sd->dacl->num_aces;i++) {
 354                         BOOL found = False;
 355
 356                         for (j=0;old->dacl && j<old->dacl->num_aces;j++) {
 357                                 if (sid_equal(&sd->dacl->ace[i].sid,
 358                                               &old->dacl->ace[j].sid)) {
 359                                         old->dacl->ace[j] = sd->dacl->ace[i];
 360                                         found = True;
 361                                 }
 362                         }
 363
 364                         if (!found) {
 365                                 fstring str;
 366
 367                                 SidToString(str, &sd->dacl->ace[i].sid);
 368                                 printf("ACL for SID %s not found\n", str);
 369                         }
 370                 }
 371
 372                 break;
 373
 374         case ACL_ADD:
 375                 for (i=0;sd->dacl && i<sd->dacl->num_aces;i++) {
 376                         add_ace(&old->dacl, &sd->dacl->ace[i]);
 377                 }
 378                 break;
 379
 380         case ACL_SET:
 381                 free_sec_desc(&old);
 382                 old = sd;
 383                 break;
 384
 385         }
 386
 387         if (sd != old) {
 388                 free_sec_desc(&sd);
 389         }
 390
 391         sd = make_sec_desc(old->revision, old->owner_sid, old->grp_sid,
 392                            NULL, old->dacl, &sd_size);
 393
 394         if (!cli_set_secdesc(cli, fnum, sd)) {
 395                 printf("ERROR: secdesc set failed: %s\n", cli_errstr(cli));
 396                 return;
 397         }
 398
 399         free_sec_desc(&sd);
 400         free_sec_desc(&old);
 401
 402         cli_close(cli, fnum);
 403 }
 404
 405
 406 /*****************************************************
 407 return a connection to a server
 408 *******************************************************/
 409 struct cli_state *connect_one(char *share)
 410 {
 411         struct cli_state *c;
 412         struct nmb_name called, calling;
 413         char *server_n;
 414         fstring server;
 415         struct in_addr ip;
 416         extern struct in_addr ipzero;
 417         extern pstring global_myname;
 418
 419         fstrcpy(server,share+2);
 420         share = strchr(server,'\\');
 421         if (!share) return NULL;
 422         *share = 0;
 423         share++;
 424
 425         server_n = server;
 426
 427         ip = ipzero;
 428
 429         make_nmb_name(&calling, global_myname, 0x0);
 430         make_nmb_name(&called , server, 0x20);
 431
 432  again:
 433         ip = ipzero;
 434
 435         /* have to open a new connection */
 436         if (!(c=cli_initialise(NULL)) || (cli_set_port(c, 139) == 0) ||
 437             !cli_connect(c, server_n, &ip)) {
 438                 DEBUG(0,("Connection to %s failed\n", server_n));
 439                 return NULL;
 440         }
 441
 442         if (!cli_session_request(c, &calling, &called)) {
 443                 DEBUG(0,("session request to %s failed\n", called.name));
 444                 cli_shutdown(c);
 445                 if (strcmp(called.name, "*SMBSERVER")) {
 446                         make_nmb_name(&called , "*SMBSERVER", 0x20);
 447                         goto again;
 448                 }
 449                 return NULL;
 450         }
 451
 452         DEBUG(4,(" session request ok\n"));
 453
 454         if (!cli_negprot(c)) {
 455                 DEBUG(0,("protocol negotiation failed\n"));
 456                 cli_shutdown(c);
 457                 return NULL;
 458         }
 459
 460         if (!got_pass) {
 461                 char *pass = getpass("Password: ");
 462                 if (pass) {
 463                         pstrcpy(password, pass);
 464                 }
 465         }
 466
 467         if (!cli_session_setup(c, username,
 468                                password, strlen(password),
 469                                password, strlen(password),
 470                                lp_workgroup())) {
 471                 DEBUG(0,("session setup failed: %s\n", cli_errstr(c)));
 472                 return NULL;
 473         }
 474
 475         DEBUG(4,(" session setup ok\n"));
 476
 477         if (!cli_send_tconX(c, share, "?????",
 478                             password, strlen(password)+1)) {
 479                 DEBUG(0,("tree connect failed: %s\n", cli_errstr(c)));
 480                 cli_shutdown(c);
 481                 return NULL;
 482         }
 483
 484         DEBUG(4,(" tconx ok\n"));
 485
 486         return c;
 487 }
 488
 489
 490 static void usage(void)
 491 {
 492         printf(
 493 "Usage: smbcacls //server1/share1 filename [options]\n\n\
 494 \n\
 495 \t-D <acls>               delete an acl\n\
 496 \t-M <acls>               modify an acl\n\
 497 \t-A <acls>               add an acl\n\
 498 \t-S <acls>               set acls\n\
 499 \t-U username             set the network username\n\
 500 \t-n                      don't resolve sids or masks to names\n\
 501 \t-h                      print help\n\
 502 \n\
 503 An acl is of the form ACL:<SID>:type/flags/mask\n\
 504 You can string acls together with spaces, commas or newlines\n\
 505 ");
 506 }
 507
 508 /****************************************************************************
 509   main program
 510 ****************************************************************************/
 511  int main(int argc,char *argv[])
 512 {
 513         char *share;
 514         char *filename;
 515         extern char *optarg;
 516         extern int optind;
 517         extern FILE *dbf;
 518         int opt;
 519         char *p;
 520         int seed;
 521         static pstring servicesf = CONFIGFILE;
 522         struct cli_state *cli;
 523         enum acl_mode mode;
 524         char *acl = NULL;
 525
 526         setlinebuf(stdout);
 527
 528         dbf = stderr;
 529
 530         if (argc < 4 || argv[1][0] == '-') {
 531                 usage();
 532                 exit(1);
 533         }
 534
 535         setup_logging(argv[0],True);
 536
 537         share = argv[1];
 538         filename = argv[2];
 539         all_string_sub(share,"/","\\",0);
 540
 541         argc -= 2;
 542         argv += 2;
 543
 544         TimeInit();
 545         charset_initialise();
 546
 547         lp_load(servicesf,True,False,False);
 548         codepage_initialise(lp_client_code_page());
 549         load_interfaces();
 550
 551         if (getenv("USER")) {
 552                 pstrcpy(username,getenv("USER"));
 553         }
 554
 555         seed = time(NULL);
 556
 557         while ((opt = getopt(argc, argv, "U:nhS:D:A:M:")) != EOF) {
 558                 switch (opt) {
 559                 case 'U':
 560                         pstrcpy(username,optarg);
 561                         p = strchr(username,'%');
 562                         if (p) {
 563                                 *p = 0;
 564                                 pstrcpy(password, p+1);
 565                                 got_pass = 1;
 566                         }
 567                         break;
 568
 569                 case 'S':
 570                         acl = optarg;
 571                         mode = ACL_SET;
 572                         break;
 573
 574                 case 'D':
 575                         acl = optarg;
 576                         mode = ACL_DELETE;
 577                         break;
 578
 579                 case 'M':
 580                         acl = optarg;
 581                         mode = ACL_MODIFY;
 582                         break;
 583
 584                 case 'A':
 585                         acl = optarg;
 586                         mode = ACL_ADD;
 587                         break;
 588
 589                 case 'n':
 590                         numeric = 1;
 591                         break;
 592
 593                 case 'h':
 594                         usage();
 595                         exit(1);
 596
 597                 default:
 598                         printf("Unknown option %c (%d)\n", (char)opt, opt);
 599                         exit(1);
 600                 }
 601         }
 602
 603         argc -= optind;
 604         argv += optind;
 605
 606         cli = connect_one(share);
 607         if (!cli) exit(1);
 608
 609         if (acl) {
 610                 cacl_set(cli, filename, acl, mode);
 611         } else {
 612                 cacl_dump(cli, filename);
 613         }
 614
 615         return(0);
 616 }