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 /**
  40  * confirm that a domain join is still valid
  41  *
  42  * @return A shell status integer (0 for success)
  43  *
  44  **/
  45 int net_rpc_join_ok(const char *domain)
  46 {
  47         struct cli_state *cli;
  48         uchar stored_md4_trust_password[16];
  49         int retval = 1;
  50         uint32 channel;
  51         NTSTATUS result;
  52         uint32 neg_flags = 0x000001ff;
  53
  54         /* Connect to remote machine */
  55         if (!(cli = net_make_ipc_connection(NET_FLAGS_ANONYMOUS | NET_FLAGS_PDC))) {
  56                 return 1;
  57         }
  58
  59         if (!cli_nt_session_open(cli, PI_NETLOGON)) {
  60                 DEBUG(0,("Error connecting to NETLOGON pipe\n"));
  61                 goto done;
  62         }
  63
  64         if (!secrets_fetch_trust_account_password(domain,
  65                                                   stored_md4_trust_password, NULL)) {
  66                 DEBUG(0,("Could not reterive domain trust secret"));
  67                 goto done;
  68         }
  69
  70         if (lp_server_role() == ROLE_DOMAIN_BDC ||
  71             lp_server_role() == ROLE_DOMAIN_PDC) {
  72                 channel = SEC_CHAN_BDC;
  73         } else {
  74                 channel = SEC_CHAN_WKSTA;
  75         }
  76
  77         CHECK_RPC_ERR(cli_nt_setup_creds(cli,
  78                                          channel,
  79                                          stored_md4_trust_password, &neg_flags, 2),
  80                           "error in domain join verification");
  81
  82         retval = 0;             /* Success! */
  83
  84 done:
  85         /* Close down pipe - this will clean up open policy handles */
  86         if (cli->nt_pipe_fnum)
  87                 cli_nt_session_close(cli);
  88
  89         cli_shutdown(cli);
  90
  91         return retval;
  92 }
  93
  94 /**
  95  * Join a domain using the administrator username and password
  96  *
  97  * @param argc  Standard main() style argc
  98  * @param argc  Standard main() style argv.  Initial components are already
  99  *              stripped.  Currently not used.
 100  * @return A shell status integer (0 for success)
 101  *
 102  **/
 103
 104 int net_rpc_join_newstyle(int argc, const char **argv)
 105 {
 106
 107         /* libsmb variables */
 108
 109         struct cli_state *cli;
 110         TALLOC_CTX *mem_ctx;
 111         uint32 acb_info;
 112
 113         /* rpc variables */
 114
 115         POLICY_HND lsa_pol, sam_pol, domain_pol, user_pol;
 116         DOM_SID domain_sid;
 117         uint32 user_rid;
 118
 119         /* Password stuff */
 120
 121         char *clear_trust_password = NULL;
 122         fstring ucs2_trust_password;
 123         int ucs2_pw_len;
 124         uchar pwbuf[516], sess_key[16];
 125         SAM_USERINFO_CTR ctr;
 126         SAM_USER_INFO_24 p24;
 127         SAM_USER_INFO_10 p10;
 128
 129         /* Misc */
 130
 131         NTSTATUS result;
 132         int retval = 1;
 133         fstring domain;
 134         uint32 num_rids, *name_types, *user_rids;
 135         uint32 flags = 0x3e8;
 136         char *acct_name;
 137         const char *const_acct_name;
 138
 139         /* Connect to remote machine */
 140
 141         if (!(cli = net_make_ipc_connection(NET_FLAGS_PDC)))
 142                 return 1;
 143
 144         if (!(mem_ctx = talloc_init("net_rpc_join_newstyle"))) {
 145                 DEBUG(0, ("Could not initialise talloc context\n"));
 146                 goto done;
 147         }
 148
 149         /* Fetch domain sid */
 150
 151         if (!cli_nt_session_open(cli, PI_LSARPC)) {
 152                 DEBUG(0, ("Error connecting to SAM pipe\n"));
 153                 goto done;
 154         }
 155
 156
 157         CHECK_RPC_ERR(cli_lsa_open_policy(cli, mem_ctx, True,
 158                                           SEC_RIGHTS_MAXIMUM_ALLOWED,
 159                                           &lsa_pol),
 160                       "error opening lsa policy handle");
 161
 162         CHECK_RPC_ERR(cli_lsa_query_info_policy(cli, mem_ctx, &lsa_pol,
 163                                                 5, domain, &domain_sid),
 164                       "error querying info policy");
 165
 166         cli_lsa_close(cli, mem_ctx, &lsa_pol);
 167
 168         cli_nt_session_close(cli); /* Done with this pipe */
 169
 170         /* Create domain user */
 171         if (!cli_nt_session_open(cli, PI_SAMR)) {
 172                 DEBUG(0, ("Error connecting to SAM pipe\n"));
 173                 goto done;
 174         }
 175
 176         CHECK_RPC_ERR(cli_samr_connect(cli, mem_ctx,
 177                                        SEC_RIGHTS_MAXIMUM_ALLOWED,
 178                                        &sam_pol),
 179                       "could not connect to SAM database");
 180
 181
 182         CHECK_RPC_ERR(cli_samr_open_domain(cli, mem_ctx, &sam_pol,
 183                                            SEC_RIGHTS_MAXIMUM_ALLOWED,
 184                                            &domain_sid, &domain_pol),
 185                       "could not open domain");
 186
 187         /* Create domain user */
 188         acct_name = talloc_asprintf(mem_ctx, "%s$", global_myname());
 189         strlower(acct_name);
 190         const_acct_name = acct_name;
 191
 192         acb_info = ((lp_server_role() == ROLE_DOMAIN_BDC) || lp_server_role() == ROLE_DOMAIN_PDC) ? ACB_SVRTRUST : ACB_WSTRUST;
 193
 194         result = cli_samr_create_dom_user(cli, mem_ctx, &domain_pol,
 195                                           acct_name, acb_info,
 196                                           0xe005000b, &user_pol,
 197                                           &user_rid);
 198
 199         if (!NT_STATUS_IS_OK(result) &&
 200             !NT_STATUS_EQUAL(result, NT_STATUS_USER_EXISTS)) {
 201                 d_printf("Create of workstation account failed\n");
 202
 203                 /* If NT_STATUS_ACCESS_DENIED then we have a valid
 204                    username/password combo but the user does not have
 205                    administrator access. */
 206
 207                 if (NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED))
 208                         d_printf("User specified does not have administrator privileges\n");
 209
 210                 goto done;
 211         }
 212
 213         /* We *must* do this.... don't ask... */
 214
 215         if (NT_STATUS_IS_OK(result))
 216                 cli_samr_close(cli, mem_ctx, &user_pol);
 217
 218         CHECK_RPC_ERR_DEBUG(cli_samr_lookup_names(cli, mem_ctx,
 219                                                   &domain_pol, flags,
 220                                                   1, &const_acct_name,
 221                                                   &num_rids,
 222                                                   &user_rids, &name_types),
 223                             ("error looking up rid for user %s: %s\n",
 224                              acct_name, nt_errstr(result)));
 225
 226         if (name_types[0] != SID_NAME_USER) {
 227                 DEBUG(0, ("%s is not a user account\n", acct_name));
 228                 goto done;
 229         }
 230
 231         user_rid = user_rids[0];
 232
 233         /* Open handle on user */
 234
 235         CHECK_RPC_ERR_DEBUG(
 236                 cli_samr_open_user(cli, mem_ctx, &domain_pol,
 237                                    SEC_RIGHTS_MAXIMUM_ALLOWED,
 238                                    user_rid, &user_pol),
 239                 ("could not re-open existing user %s: %s\n",
 240                  acct_name, nt_errstr(result)));
 241
 242         /* Create a random machine account password */
 243
 244         {
 245                 char *str;
 246                 str = generate_random_str(DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);
 247                 clear_trust_password = strdup(str);
 248         }
 249
 250         ucs2_pw_len = push_ucs2(NULL, ucs2_trust_password,
 251                                 clear_trust_password,
 252                                 sizeof(ucs2_trust_password), 0);
 253
 254         encode_pw_buffer((char *)pwbuf, ucs2_trust_password,
 255                          ucs2_pw_len);
 256
 257         /* Set password on machine account */
 258
 259         ZERO_STRUCT(ctr);
 260         ZERO_STRUCT(p24);
 261
 262         init_sam_user_info24(&p24, (char *)pwbuf,24);
 263
 264         ctr.switch_value = 24;
 265         ctr.info.id24 = &p24;
 266
 267         CHECK_RPC_ERR(cli_samr_set_userinfo(cli, mem_ctx, &user_pol, 24,
 268                                             cli->user_session_key, &ctr),
 269                       "error setting trust account password");
 270
 271         /* Why do we have to try to (re-)set the ACB to be the same as what
 272            we passed in the samr_create_dom_user() call?  When a NT
 273            workstation is joined to a domain by an administrator the
 274            acb_info is set to 0x80.  For a normal user with "Add
 275            workstations to the domain" rights the acb_info is 0x84.  I'm
 276            not sure whether it is supposed to make a difference or not.  NT
 277            seems to cope with either value so don't bomb out if the set
 278            userinfo2 level 0x10 fails.  -tpot */
 279
 280         ZERO_STRUCT(ctr);
 281         ctr.switch_value = 0x10;
 282         ctr.info.id10 = &p10;
 283
 284         init_sam_user_info10(&p10, acb_info);
 285
 286         /* Ignoring the return value is necessary for joining a domain
 287            as a normal user with "Add workstation to domain" privilege. */
 288
 289         result = cli_samr_set_userinfo2(cli, mem_ctx, &user_pol, 0x10,
 290                                         sess_key, &ctr);
 291
 292         /* Now store the secret in the secrets database */
 293
 294         strupper(domain);
 295
 296         if (!secrets_store_domain_sid(domain, &domain_sid)) {
 297                 DEBUG(0, ("error storing domain sid for %s\n", domain));
 298                 goto done;
 299         }
 300
 301         if (!secrets_store_machine_password(clear_trust_password)) {
 302                 DEBUG(0, ("error storing plaintext domain secrets for %s\n", domain));
 303         }
 304
 305         /* Now check the whole process from top-to-bottom */
 306         cli_samr_close(cli, mem_ctx, &user_pol);
 307         cli_nt_session_close(cli); /* Done with this pipe */
 308
 309         retval = net_rpc_join_ok(domain);
 310
 311 done:
 312         /* Close down pipe - this will clean up open policy handles */
 313
 314         if (cli->nt_pipe_fnum)
 315                 cli_nt_session_close(cli);
 316
 317         /* Display success or failure */
 318
 319         if (retval != 0) {
 320                 trust_password_delete(domain);
 321                 fprintf(stderr,"Unable to join domain %s.\n",domain);
 322         } else {
 323                 printf("Joined domain %s.\n",domain);
 324         }
 325
 326         cli_shutdown(cli);
 327
 328         SAFE_FREE(clear_trust_password);
 329
 330         return retval;
 331 }
 332
 333
 334 /**
 335  * check that a join is OK
 336  *
 337  * @return A shell status integer (0 for success)
 338  *
 339  **/
 340 int net_rpc_testjoin(int argc, const char **argv)
 341 {
 342         char *domain = smb_xstrdup(lp_workgroup());
 343
 344         /* Display success or failure */
 345         if (net_rpc_join_ok(domain) != 0) {
 346                 fprintf(stderr,"Join to domain '%s' is not valid\n",domain);
 347                 free(domain);
 348                 return -1;
 349         }
 350
 351         printf("Join to '%s' is OK\n",domain);
 352         free(domain);
 353         return 0;
 354 }