source/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
  53         /* Connect to remote machine */
  54         if (!(cli = net_make_ipc_connection(NET_FLAGS_ANONYMOUS | NET_FLAGS_PDC))) {
  55                 return 1;
  56         }
  57
  58         if (!cli_nt_session_open(cli, PIPE_NETLOGON)) {
  59                 DEBUG(0,("Error connecting to NETLOGON pipe\n"));
  60                 goto done;
  61         }
  62
  63         if (!secrets_fetch_trust_account_password(domain,
  64                                                   stored_md4_trust_password, NULL)) {
  65                 DEBUG(0,("Could not reterive domain trust secret"));
  66                 goto done;
  67         }
  68
  69         if (lp_server_role() == ROLE_DOMAIN_BDC ||
  70             lp_server_role() == ROLE_DOMAIN_PDC) {
  71                 channel = SEC_CHAN_BDC;
  72         } else {
  73                 channel = SEC_CHAN_WKSTA;
  74         }
  75
  76         CHECK_RPC_ERR(cli_nt_setup_creds(cli,
  77                                          channel,
  78                                          stored_md4_trust_password),
  79                           "error in domain join verification");
  80
  81         retval = 0;             /* Success! */
  82
  83 done:
  84         /* Close down pipe - this will clean up open policy handles */
  85         if (cli->nt_pipe_fnum)
  86                 cli_nt_session_close(cli);
  87
  88         cli_shutdown(cli);
  89
  90         return retval;
  91 }
  92
  93 /**
  94  * Join a domain using the administrator username and password
  95  *
  96  * @param argc  Standard main() style argc
  97  * @param argc  Standard main() style argv.  Initial components are already
  98  *              stripped.  Currently not used.
  99  * @return A shell status integer (0 for success)
 100  *
 101  **/
 102
 103 int net_rpc_join_newstyle(int argc, const char **argv)
 104 {
 105
 106         extern pstring global_myname;
 107
 108         /* libsmb variables */
 109
 110         struct cli_state *cli;
 111         TALLOC_CTX *mem_ctx;
 112         uint32 acb_info;
 113
 114         /* rpc variables */
 115
 116         POLICY_HND lsa_pol, sam_pol, domain_pol, user_pol;
 117         DOM_SID domain_sid;
 118         uint32 user_rid;
 119
 120         /* Password stuff */
 121
 122         char *clear_trust_password = NULL;
 123         fstring ucs2_trust_password;
 124         int ucs2_pw_len;
 125         uchar pwbuf[516], sess_key[16];
 126         SAM_USERINFO_CTR ctr;
 127         SAM_USER_INFO_24 p24;
 128         SAM_USER_INFO_10 p10;
 129
 130         /* Misc */
 131
 132         NTSTATUS result;
 133         int retval = 1;
 134         fstring domain;
 135         uint32 num_rids, *name_types, *user_rids;
 136         uint32 flags = 0x3e8;
 137         char *acct_name;
 138         const char *const_acct_name;
 139
 140         /* Connect to remote machine */
 141
 142         if (!(cli = net_make_ipc_connection(NET_FLAGS_PDC)))
 143                 return 1;
 144
 145         if (!(mem_ctx = talloc_init())) {
 146                 DEBUG(0, ("Could not initialise talloc context\n"));
 147                 goto done;
 148         }
 149
 150         /* Fetch domain sid */
 151
 152         if (!cli_nt_session_open(cli, PIPE_LSARPC)) {
 153                 DEBUG(0, ("Error connecting to SAM pipe\n"));
 154                 goto done;
 155         }
 156
 157
 158         CHECK_RPC_ERR(cli_lsa_open_policy(cli, mem_ctx, True,
 159                                           SEC_RIGHTS_MAXIMUM_ALLOWED,
 160                                           &lsa_pol),
 161                       "error opening lsa policy handle");
 162
 163         CHECK_RPC_ERR(cli_lsa_query_info_policy(cli, mem_ctx, &lsa_pol,
 164                                                 5, domain, &domain_sid),
 165                       "error querying info policy");
 166
 167         cli_lsa_close(cli, mem_ctx, &lsa_pol);
 168
 169         cli_nt_session_close(cli); /* Done with this pipe */
 170
 171         /* Create domain user */
 172         if (!cli_nt_session_open(cli, PIPE_SAMR)) {
 173                 DEBUG(0, ("Error connecting to SAM pipe\n"));
 174                 goto done;
 175         }
 176
 177         CHECK_RPC_ERR(cli_samr_connect(cli, mem_ctx,
 178                                        SEC_RIGHTS_MAXIMUM_ALLOWED,
 179                                        &sam_pol),
 180                       "could not connect to SAM database");
 181
 182
 183         CHECK_RPC_ERR(cli_samr_open_domain(cli, mem_ctx, &sam_pol,
 184                                            SEC_RIGHTS_MAXIMUM_ALLOWED,
 185                                            &domain_sid, &domain_pol),
 186                       "could not open domain");
 187
 188         /* Create domain user */
 189         acct_name = talloc_asprintf(mem_ctx, "%s$", global_myname);
 190         strlower(acct_name);
 191         const_acct_name = acct_name;
 192
 193         acb_info = ((lp_server_role() == ROLE_DOMAIN_BDC) || lp_server_role() == ROLE_DOMAIN_PDC) ? ACB_SVRTRUST : ACB_WSTRUST;
 194
 195         result = cli_samr_create_dom_user(cli, mem_ctx, &domain_pol,
 196                                           acct_name, acb_info,
 197                                           0xe005000b, &user_pol,
 198                                           &user_rid);
 199
 200         if (!NT_STATUS_IS_OK(result) &&
 201             !NT_STATUS_EQUAL(result, NT_STATUS_USER_EXISTS)) {
 202                 d_printf("Create of workstation account failed\n");
 203
 204                 /* If NT_STATUS_ACCESS_DENIED then we have a valid
 205                    username/password combo but the user does not have
 206                    administrator access. */
 207
 208                 if (NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED))
 209                         d_printf("User specified does not have administrator privileges\n");
 210
 211                 goto done;
 212         }
 213
 214         /* We *must* do this.... don't ask... */
 215
 216         if (NT_STATUS_IS_OK(result))
 217                 cli_samr_close(cli, mem_ctx, &user_pol);
 218
 219         CHECK_RPC_ERR_DEBUG(cli_samr_lookup_names(cli, mem_ctx,
 220                                                   &domain_pol, flags,
 221                                                   1, &const_acct_name,
 222                                                   &num_rids,
 223                                                   &user_rids, &name_types),
 224                             ("error looking up rid for user %s: %s\n",
 225                              acct_name, nt_errstr(result)));
 226
 227         if (name_types[0] != SID_NAME_USER) {
 228                 DEBUG(0, ("%s is not a user account\n", acct_name));
 229                 goto done;
 230         }
 231
 232         user_rid = user_rids[0];
 233
 234         /* Open handle on user */
 235
 236         CHECK_RPC_ERR_DEBUG(
 237                 cli_samr_open_user(cli, mem_ctx, &domain_pol,
 238                                    SEC_RIGHTS_MAXIMUM_ALLOWED,
 239                                    user_rid, &user_pol),
 240                 ("could not re-open existing user %s: %s\n",
 241                  acct_name, nt_errstr(result)));
 242
 243         /* Create a random machine account password */
 244
 245         {
 246                 char *str;
 247                 str = generate_random_str(DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);
 248                 clear_trust_password = strdup(str);
 249         }
 250
 251         ucs2_pw_len = push_ucs2(NULL, ucs2_trust_password,
 252                                 clear_trust_password,
 253                                 sizeof(ucs2_trust_password), 0);
 254
 255         encode_pw_buffer((char *)pwbuf, ucs2_trust_password,
 256                          ucs2_pw_len);
 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         /* I don't think this is quite the right place for this
 269            calculation.  It should be moved somewhere where the credentials
 270            are calculated. )-: */
 271
 272         mdfour(sess_key, cli->pwd.smb_nt_pwd, 16);
 273
 274         CHECK_RPC_ERR(cli_samr_set_userinfo(cli, mem_ctx, &user_pol, 24,
 275                                             sess_key, &ctr),
 276                       "error setting trust account password");
 277
 278         /* Why do we have to try to (re-)set the ACB to be the same as what
 279            we passed in the samr_create_dom_user() call?  When a NT
 280            workstation is joined to a domain by an administrator the
 281            acb_info is set to 0x80.  For a normal user with "Add
 282            workstations to the domain" rights the acb_info is 0x84.  I'm
 283            not sure whether it is supposed to make a difference or not.  NT
 284            seems to cope with either value so don't bomb out if the set
 285            userinfo2 level 0x10 fails.  -tpot */
 286
 287         ZERO_STRUCT(ctr);
 288         ctr.switch_value = 0x10;
 289         ctr.info.id10 = &p10;
 290
 291         init_sam_user_info10(&p10, acb_info);
 292
 293         /* Ignoring the return value is necessary for joining a domain
 294            as a normal user with "Add workstation to domain" privilege. */
 295
 296         result = cli_samr_set_userinfo2(cli, mem_ctx, &user_pol, 0x10,
 297                                         sess_key, &ctr);
 298
 299         /* Now store the secret in the secrets database */
 300
 301         strupper(domain);
 302
 303         if (!secrets_store_domain_sid(domain, &domain_sid)) {
 304                 DEBUG(0, ("error storing domain sid for %s\n", domain));
 305                 goto done;
 306         }
 307
 308         if (!secrets_store_machine_password(clear_trust_password)) {
 309                 DEBUG(0, ("error storing plaintext domain secrets for %s\n", domain));
 310         }
 311
 312         /* Now check the whole process from top-to-bottom */
 313         cli_samr_close(cli, mem_ctx, &user_pol);
 314         cli_nt_session_close(cli); /* Done with this pipe */
 315
 316         retval = net_rpc_join_ok(domain);
 317
 318 done:
 319         /* Close down pipe - this will clean up open policy handles */
 320
 321         if (cli->nt_pipe_fnum)
 322                 cli_nt_session_close(cli);
 323
 324         /* Display success or failure */
 325
 326         if (retval != 0) {
 327                 trust_password_delete(domain);
 328                 fprintf(stderr,"Unable to join domain %s.\n",domain);
 329         } else {
 330                 printf("Joined domain %s.\n",domain);
 331         }
 332
 333         cli_shutdown(cli);
 334
 335         SAFE_FREE(clear_trust_password);
 336
 337         return retval;
 338 }
 339
 340
 341 /**
 342  * check that a join is OK
 343  *
 344  * @return A shell status integer (0 for success)
 345  *
 346  **/
 347 int net_rpc_testjoin(int argc, const char **argv)
 348 {
 349         char *domain = lp_workgroup();
 350
 351         domain = smb_xstrdup(domain);
 352
 353         /* Display success or failure */
 354         if (net_rpc_join_ok(domain) != 0) {
 355                 fprintf(stderr,"Join to domain '%s' is not valid\n",domain);
 356                 free(domain);
 357                 return -1;
 358         }
 359
 360         printf("Join to '%s' is OK\n",domain);
 361         free(domain);
 362         return 0;
 363 }