source3/utils/net_rpc_join.c

   1 /*
   2    Samba Unix/Linux SMB client library
   3    Distributed SMB/CIFS Server Management Utility
   4    Copyright (C) 2001 Andrew Bartlett (abartlet@samba.org)
   5    Copyright (C) Tim Potter     2001
   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 2 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, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 #include "includes.h"
  22 #include "utils/net.h"
  23
  24 /* Macro for checking RPC error codes to make things more readable */
  25
  26 #define CHECK_RPC_ERR(rpc, msg) \
  27         if (!NT_STATUS_IS_OK(result = rpc)) { \
  28                 DEBUG(0, (msg ": %s\n", nt_errstr(result))); \
  29                 goto done; \
  30         }
  31
  32 #define CHECK_RPC_ERR_DEBUG(rpc, debug_args) \
  33         if (!NT_STATUS_IS_OK(result = rpc)) { \
  34                 DEBUG(0, debug_args); \
  35                 goto done; \
  36         }
  37
  38 /**
  39  * confirm that a domain join is still valid
  40  *
  41  * @return A shell status integer (0 for success)
  42  *
  43  **/
  44 static int net_rpc_join_ok(const char *domain)
  45 {
  46         struct cli_state *cli = NULL;
  47         struct rpc_pipe_client *pipe_hnd = NULL;
  48         int retval = 1;
  49         NTSTATUS ret;
  50
  51         /* Connect to remote machine */
  52         if (!(cli = net_make_ipc_connection(NET_FLAGS_ANONYMOUS | NET_FLAGS_PDC))) {
  53                 return 1;
  54         }
  55
  56         pipe_hnd = cli_rpc_pipe_open_schannel(cli, PI_NETLOGON,
  57                                                 PIPE_AUTH_LEVEL_PRIVACY,
  58                                                 domain, &ret);
  59
  60         if (!pipe_hnd) {
  61                 DEBUG(0,("Error connecting to NETLOGON pipe. Error was %s\n", nt_errstr(ret) ));
  62                 goto done;
  63         }
  64
  65         retval = 0;             /* Success! */
  66
  67 done:
  68
  69         cli_shutdown(cli);
  70         return retval;
  71 }
  72
  73 /**
  74  * Join a domain using the administrator username and password
  75  *
  76  * @param argc  Standard main() style argc
  77  * @param argc  Standard main() style argv.  Initial components are already
  78  *              stripped.  Currently not used.
  79  * @return A shell status integer (0 for success)
  80  *
  81  **/
  82
  83 int net_rpc_join_newstyle(int argc, const char **argv)
  84 {
  85
  86         /* libsmb variables */
  87
  88         struct cli_state *cli;
  89         TALLOC_CTX *mem_ctx;
  90         uint32 acb_info = ACB_WSTRUST;
  91         uint32 neg_flags = NETLOGON_NEG_AUTH2_FLAGS|NETLOGON_NEG_SCHANNEL;
  92         uint32 sec_channel_type;
  93         struct rpc_pipe_client *pipe_hnd = NULL;
  94         struct rpc_pipe_client *netlogon_schannel_pipe = NULL;
  95
  96         /* rpc variables */
  97
  98         POLICY_HND lsa_pol, sam_pol, domain_pol, user_pol;
  99         DOM_SID *domain_sid;
 100         uint32 user_rid;
 101
 102         /* Password stuff */
 103
 104         char *clear_trust_password = NULL;
 105         uchar pwbuf[516];
 106         SAM_USERINFO_CTR ctr;
 107         SAM_USER_INFO_24 p24;
 108         SAM_USER_INFO_16 p16;
 109         uchar md4_trust_password[16];
 110
 111         /* Misc */
 112
 113         NTSTATUS result;
 114         int retval = 1;
 115         char *domain;
 116         uint32 num_rids, *name_types, *user_rids;
 117         uint32 flags = 0x3e8;
 118         char *acct_name;
 119         const char *const_acct_name;
 120
 121         /* check what type of join */
 122         if (argc >= 0) {
 123                 sec_channel_type = get_sec_channel_type(argv[0]);
 124         } else {
 125                 sec_channel_type = get_sec_channel_type(NULL);
 126         }
 127
 128         switch (sec_channel_type) {
 129         case SEC_CHAN_WKSTA:
 130                 acb_info = ACB_WSTRUST;
 131                 break;
 132         case SEC_CHAN_BDC:
 133                 acb_info = ACB_SVRTRUST;
 134                 break;
 135 #if 0
 136         case SEC_CHAN_DOMAIN:
 137                 acb_info = ACB_DOMTRUST;
 138                 break;
 139 #endif
 140         }
 141
 142         /* Make authenticated connection to remote machine */
 143
 144         if (!(cli = net_make_ipc_connection(NET_FLAGS_PDC)))
 145                 return 1;
 146
 147         if (!(mem_ctx = talloc_init("net_rpc_join_newstyle"))) {
 148                 DEBUG(0, ("Could not initialise talloc context\n"));
 149                 goto done;
 150         }
 151
 152         /* Fetch domain sid */
 153
 154         pipe_hnd = cli_rpc_pipe_open_noauth(cli, PI_LSARPC, &result);
 155         if (!pipe_hnd) {
 156                 DEBUG(0, ("Error connecting to LSA pipe. Error was %s\n",
 157                         nt_errstr(result) ));
 158                 goto done;
 159         }
 160
 161
 162         CHECK_RPC_ERR(rpccli_lsa_open_policy(pipe_hnd, mem_ctx, True,
 163                                           SEC_RIGHTS_MAXIMUM_ALLOWED,
 164                                           &lsa_pol),
 165                       "error opening lsa policy handle");
 166
 167         CHECK_RPC_ERR(rpccli_lsa_query_info_policy(pipe_hnd, mem_ctx, &lsa_pol,
 168                                                 5, &domain, &domain_sid),
 169                       "error querying info policy");
 170
 171         rpccli_lsa_close(pipe_hnd, mem_ctx, &lsa_pol);
 172         cli_rpc_pipe_close(pipe_hnd); /* Done with this pipe */
 173
 174         /* Create domain user */
 175         pipe_hnd = cli_rpc_pipe_open_noauth(cli, PI_SAMR, &result);
 176         if (!pipe_hnd) {
 177                 DEBUG(0, ("Error connecting to SAM pipe. Error was %s\n",
 178                         nt_errstr(result) ));
 179                 goto done;
 180         }
 181
 182         CHECK_RPC_ERR(rpccli_samr_connect(pipe_hnd, mem_ctx,
 183                                        SEC_RIGHTS_MAXIMUM_ALLOWED,
 184                                        &sam_pol),
 185                       "could not connect to SAM database");
 186
 187
 188         CHECK_RPC_ERR(rpccli_samr_open_domain(pipe_hnd, mem_ctx, &sam_pol,
 189                                            SEC_RIGHTS_MAXIMUM_ALLOWED,
 190                                            domain_sid, &domain_pol),
 191                       "could not open domain");
 192
 193         /* Create domain user */
 194         acct_name = talloc_asprintf(mem_ctx, "%s$", global_myname());
 195         strlower_m(acct_name);
 196         const_acct_name = acct_name;
 197
 198         result = rpccli_samr_create_dom_user(pipe_hnd, mem_ctx, &domain_pol,
 199                                           acct_name, acb_info,
 200                                           0xe005000b, &user_pol,
 201                                           &user_rid);
 202
 203         if (!NT_STATUS_IS_OK(result) &&
 204             !NT_STATUS_EQUAL(result, NT_STATUS_USER_EXISTS)) {
 205                 d_printf("Creation of workstation account failed\n");
 206
 207                 /* If NT_STATUS_ACCESS_DENIED then we have a valid
 208                    username/password combo but the user does not have
 209                    administrator access. */
 210
 211                 if (NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED))
 212                         d_printf("User specified does not have administrator privileges\n");
 213
 214                 goto done;
 215         }
 216
 217         /* We *must* do this.... don't ask... */
 218
 219         if (NT_STATUS_IS_OK(result)) {
 220                 rpccli_samr_close(pipe_hnd, mem_ctx, &user_pol);
 221         }
 222
 223         CHECK_RPC_ERR_DEBUG(rpccli_samr_lookup_names(pipe_hnd, mem_ctx,
 224                                                   &domain_pol, flags,
 225                                                   1, &const_acct_name,
 226                                                   &num_rids,
 227                                                   &user_rids, &name_types),
 228                             ("error looking up rid for user %s: %s\n",
 229                              acct_name, nt_errstr(result)));
 230
 231         if (name_types[0] != SID_NAME_USER) {
 232                 DEBUG(0, ("%s is not a user account (type=%d)\n", acct_name, name_types[0]));
 233                 goto done;
 234         }
 235
 236         user_rid = user_rids[0];
 237
 238         /* Open handle on user */
 239
 240         CHECK_RPC_ERR_DEBUG(
 241                 rpccli_samr_open_user(pipe_hnd, mem_ctx, &domain_pol,
 242                                    SEC_RIGHTS_MAXIMUM_ALLOWED,
 243                                    user_rid, &user_pol),
 244                 ("could not re-open existing user %s: %s\n",
 245                  acct_name, nt_errstr(result)));
 246
 247         /* Create a random machine account password */
 248
 249         {
 250                 char *str;
 251                 str = generate_random_str(DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);
 252                 clear_trust_password = SMB_STRDUP(str);
 253                 E_md4hash(clear_trust_password, md4_trust_password);
 254         }
 255
 256         encode_pw_buffer(pwbuf, clear_trust_password, STR_UNICODE);
 257
 258         /* Set password on machine account */
 259
 260         ZERO_STRUCT(ctr);
 261         ZERO_STRUCT(p24);
 262
 263         init_sam_user_info24(&p24, (char *)pwbuf,24);
 264
 265         ctr.switch_value = 24;
 266         ctr.info.id24 = &p24;
 267
 268         CHECK_RPC_ERR(rpccli_samr_set_userinfo(pipe_hnd, mem_ctx, &user_pol, 24,
 269                                             &cli->user_session_key, &ctr),
 270                       "error setting trust account password");
 271
 272         /* Why do we have to try to (re-)set the ACB to be the same as what
 273            we passed in the samr_create_dom_user() call?  When a NT
 274            workstation is joined to a domain by an administrator the
 275            acb_info is set to 0x80.  For a normal user with "Add
 276            workstations to the domain" rights the acb_info is 0x84.  I'm
 277            not sure whether it is supposed to make a difference or not.  NT
 278            seems to cope with either value so don't bomb out if the set
 279            userinfo2 level 0x10 fails.  -tpot */
 280
 281         ZERO_STRUCT(ctr);
 282         ctr.switch_value = 16;
 283         ctr.info.id16 = &p16;
 284
 285         init_sam_user_info16(&p16, acb_info);
 286
 287         /* Ignoring the return value is necessary for joining a domain
 288            as a normal user with "Add workstation to domain" privilege. */
 289
 290         result = rpccli_samr_set_userinfo2(pipe_hnd, mem_ctx, &user_pol, 16,
 291                                         &cli->user_session_key, &ctr);
 292
 293         rpccli_samr_close(pipe_hnd, mem_ctx, &user_pol);
 294         cli_rpc_pipe_close(pipe_hnd); /* Done with this pipe */
 295
 296         /* Now check the whole process from top-to-bottom */
 297
 298         pipe_hnd = cli_rpc_pipe_open_noauth(cli, PI_NETLOGON, &result);
 299         if (!pipe_hnd) {
 300                 DEBUG(0,("Error connecting to NETLOGON pipe. Error was %s\n",
 301                         nt_errstr(result) ));
 302                 goto done;
 303         }
 304
 305         result = rpccli_netlogon_setup_creds(pipe_hnd,
 306                                         cli->desthost,
 307                                         domain,
 308                                         global_myname(),
 309                                         md4_trust_password,
 310                                         sec_channel_type,
 311                                         &neg_flags);
 312
 313         if (!NT_STATUS_IS_OK(result)) {
 314                 DEBUG(0, ("Error in domain join verification (credential setup failed): %s\n\n",
 315                           nt_errstr(result)));
 316
 317                 if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) &&
 318                      (sec_channel_type == SEC_CHAN_BDC) ) {
 319                         d_printf("Please make sure that no computer account\n"
 320                                  "named like this machine (%s) exists in the domain\n",
 321                                  global_myname());
 322                 }
 323
 324                 goto done;
 325         }
 326
 327         netlogon_schannel_pipe = cli_rpc_pipe_open_schannel_with_key(cli,
 328                                                         PI_NETLOGON,
 329                                                         PIPE_AUTH_LEVEL_PRIVACY,
 330                                                         domain,
 331                                                         pipe_hnd->dc,
 332                                                         &result);
 333
 334         if (!NT_STATUS_IS_OK(result)) {
 335                 DEBUG(0, ("Error in domain join verification (schannel setup failed): %s\n\n",
 336                           nt_errstr(result)));
 337
 338                 if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) &&
 339                      (sec_channel_type == SEC_CHAN_BDC) ) {
 340                         d_printf("Please make sure that no computer account\n"
 341                                  "named like this machine (%s) exists in the domain\n",
 342                                  global_myname());
 343                 }
 344
 345                 goto done;
 346         }
 347
 348         cli_rpc_pipe_close(pipe_hnd);
 349         cli_rpc_pipe_close(netlogon_schannel_pipe);
 350
 351         /* Now store the secret in the secrets database */
 352
 353         strupper_m(domain);
 354
 355         if (!secrets_store_domain_sid(domain, domain_sid)) {
 356                 DEBUG(0, ("error storing domain sid for %s\n", domain));
 357                 goto done;
 358         }
 359
 360         if (!secrets_store_machine_password(clear_trust_password, domain, sec_channel_type)) {
 361                 DEBUG(0, ("error storing plaintext domain secrets for %s\n", domain));
 362         }
 363
 364         /* double-check, connection from scratch */
 365         retval = net_rpc_join_ok(domain);
 366
 367 done:
 368
 369         /* Display success or failure */
 370
 371         if (retval != 0) {
 372                 fprintf(stderr,"Unable to join domain %s.\n",domain);
 373         } else {
 374                 printf("Joined domain %s.\n",domain);
 375         }
 376
 377         cli_shutdown(cli);
 378
 379         SAFE_FREE(clear_trust_password);
 380
 381         return retval;
 382 }
 383
 384 /**
 385  * check that a join is OK
 386  *
 387  * @return A shell status integer (0 for success)
 388  *
 389  **/
 390 int net_rpc_testjoin(int argc, const char **argv)
 391 {
 392         char *domain = smb_xstrdup(opt_target_workgroup);
 393
 394         /* Display success or failure */
 395         if (net_rpc_join_ok(domain) != 0) {
 396                 fprintf(stderr,"Join to domain '%s' is not valid\n",domain);
 397                 free(domain);
 398                 return -1;
 399         }
 400
 401         printf("Join to '%s' is OK\n",domain);
 402         free(domain);
 403         return 0;
 404 }