source/rpc_server/srv_netlog_nt.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  RPC Pipe client / server routines
   4  *  Copyright (C) Andrew Tridgell              1992-1997,
   5  *  Copyright (C) Luke Kenneth Casson Leighton 1996-1997,
   6  *  Copyright (C) Paul Ashton                       1997.
   7  *  Copyright (C) Jeremy Allison               1998-2001.
   8  *  Copyright (C) Andrew Bartlett                   2001.
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23  */
  24
  25 /* This is the implementation of the netlogon pipe. */
  26
  27 #include "includes.h"
  28
  29 extern userdom_struct current_user_info;
  30
  31 #undef DBGC_CLASS
  32 #define DBGC_CLASS DBGC_RPC_SRV
  33
  34 /*************************************************************************
  35  init_net_r_req_chal:
  36  *************************************************************************/
  37
  38 static void init_net_r_req_chal(NET_R_REQ_CHAL *r_c,
  39                                 DOM_CHAL *srv_chal, NTSTATUS status)
  40 {
  41         DEBUG(6,("init_net_r_req_chal: %d\n", __LINE__));
  42         memcpy(r_c->srv_chal.data, srv_chal->data, sizeof(srv_chal->data));
  43         r_c->status = status;
  44 }
  45
  46 /*************************************************************************
  47  error messages cropping up when using nltest.exe...
  48  *************************************************************************/
  49
  50 #define ERROR_NO_SUCH_DOMAIN   0x54b
  51 #define ERROR_NO_LOGON_SERVERS 0x51f
  52 #define NO_ERROR               0x0
  53
  54 /*************************************************************************
  55  net_reply_logon_ctrl:
  56  *************************************************************************/
  57
  58 NTSTATUS _net_logon_ctrl(pipes_struct *p, NET_Q_LOGON_CTRL *q_u,
  59                        NET_R_LOGON_CTRL *r_u)
  60 {
  61         uint32 flags = 0x0;
  62         uint32 pdc_connection_status = 0x00; /* Maybe a win32 error code? */
  63
  64         /* Setup the Logon Control response */
  65
  66         init_net_r_logon_ctrl(r_u, q_u->query_level, flags,
  67                               pdc_connection_status);
  68
  69         return r_u->status;
  70 }
  71
  72 /****************************************************************************
  73 Send a message to smbd to do a sam synchronisation
  74 **************************************************************************/
  75
  76 static void send_sync_message(void)
  77 {
  78         TDB_CONTEXT *tdb;
  79
  80         tdb = tdb_open_log(lock_path("connections.tdb"), 0,
  81                            TDB_DEFAULT, O_RDONLY, 0);
  82
  83         if (!tdb) {
  84                 DEBUG(3, ("send_sync_message(): failed to open connections "
  85                           "database\n"));
  86                 return;
  87         }
  88
  89         DEBUG(3, ("sending sam synchronisation message\n"));
  90
  91         message_send_all(tdb, MSG_SMB_SAM_SYNC, NULL, 0, False, NULL);
  92
  93         tdb_close(tdb);
  94 }
  95
  96 /*************************************************************************
  97  net_reply_logon_ctrl2:
  98  *************************************************************************/
  99
 100 NTSTATUS _net_logon_ctrl2(pipes_struct *p, NET_Q_LOGON_CTRL2 *q_u, NET_R_LOGON_CTRL2 *r_u)
 101 {
 102         uint32 flags = 0x0;
 103         uint32 pdc_connection_status = 0x0;
 104         uint32 logon_attempts = 0x0;
 105         uint32 tc_status;
 106         fstring servername, domain, dc_name, dc_name2;
 107         struct in_addr dc_ip;
 108
 109         /* this should be \\global_myname() */
 110         unistr2_to_ascii(servername, &q_u->uni_server_name, sizeof(servername));
 111
 112         r_u->status = NT_STATUS_OK;
 113
 114         tc_status = ERROR_NO_SUCH_DOMAIN;
 115         fstrcpy( dc_name, "" );
 116
 117         switch ( q_u->function_code ) {
 118                 case NETLOGON_CONTROL_TC_QUERY:
 119                         unistr2_to_ascii(domain, &q_u->info.info6.domain, sizeof(domain));
 120
 121                         if ( !is_trusted_domain( domain ) )
 122                                 break;
 123
 124                         if ( !get_dc_name( domain, NULL, dc_name2, &dc_ip ) ) {
 125                                 tc_status = ERROR_NO_LOGON_SERVERS;
 126                                 break;
 127                         }
 128
 129                         fstr_sprintf( dc_name, "\\\\%s", dc_name2 );
 130
 131                         tc_status = NO_ERROR;
 132
 133                         break;
 134
 135                 case NETLOGON_CONTROL_REDISCOVER:
 136                         unistr2_to_ascii(domain, &q_u->info.info6.domain, sizeof(domain));
 137
 138                         if ( !is_trusted_domain( domain ) )
 139                                 break;
 140
 141                         if ( !get_dc_name( domain, NULL, dc_name2, &dc_ip ) ) {
 142                                 tc_status = ERROR_NO_LOGON_SERVERS;
 143                                 break;
 144                         }
 145
 146                         fstr_sprintf( dc_name, "\\\\%s", dc_name2 );
 147
 148                         tc_status = NO_ERROR;
 149
 150                         break;
 151
 152                 default:
 153                         /* no idea what this should be */
 154                         DEBUG(0,("_net_logon_ctrl2: unimplemented function level [%d]\n",
 155                                 q_u->function_code));
 156         }
 157
 158         /* prepare the response */
 159
 160         init_net_r_logon_ctrl2( r_u, q_u->query_level, flags,
 161                 pdc_connection_status, logon_attempts, tc_status, dc_name );
 162
 163         if (lp_server_role() == ROLE_DOMAIN_BDC)
 164                 send_sync_message();
 165
 166         return r_u->status;
 167 }
 168
 169 /*************************************************************************
 170  net_reply_trust_dom_list:
 171  *************************************************************************/
 172
 173 NTSTATUS _net_trust_dom_list(pipes_struct *p, NET_Q_TRUST_DOM_LIST *q_u, NET_R_TRUST_DOM_LIST *r_u)
 174 {
 175         const char *trusted_domain = "test_domain";
 176         uint32 num_trust_domains = 1;
 177
 178         DEBUG(6,("_net_trust_dom_list: %d\n", __LINE__));
 179
 180         /* set up the Trusted Domain List response */
 181         init_r_trust_dom(r_u, num_trust_domains, trusted_domain);
 182
 183         DEBUG(6,("_net_trust_dom_list: %d\n", __LINE__));
 184
 185         return r_u->status;
 186 }
 187
 188 /***********************************************************************************
 189  init_net_r_srv_pwset:
 190  ***********************************************************************************/
 191
 192 static void init_net_r_srv_pwset(NET_R_SRV_PWSET *r_s,
 193                                  DOM_CRED *srv_cred, NTSTATUS status)
 194 {
 195         DEBUG(5,("init_net_r_srv_pwset: %d\n", __LINE__));
 196
 197         memcpy(&r_s->srv_cred, srv_cred, sizeof(r_s->srv_cred));
 198         r_s->status = status;
 199
 200         DEBUG(5,("init_net_r_srv_pwset: %d\n", __LINE__));
 201 }
 202
 203 /******************************************************************
 204  gets a machine password entry.  checks access rights of the host.
 205  ******************************************************************/
 206
 207 static BOOL get_md4pw(char *md4pw, char *mach_acct)
 208 {
 209         SAM_ACCOUNT *sampass = NULL;
 210         const uint8 *pass;
 211         BOOL ret;
 212         uint32 acct_ctrl;
 213
 214 #if 0
 215     /*
 216      * Currently this code is redundent as we already have a filter
 217      * by hostname list. What this code really needs to do is to
 218      * get a hosts allowed/hosts denied list from the SAM database
 219      * on a per user basis, and make the access decision there.
 220      * I will leave this code here for now as a reminder to implement
 221      * this at a later date. JRA.
 222      */
 223
 224         if (!allow_access(lp_domain_hostsdeny(), lp_domain_hostsallow(),
 225                           client_name(), client_addr()))
 226         {
 227                 DEBUG(0,("get_md4pw: Workstation %s denied access to domain\n", mach_acct));
 228                 return False;
 229         }
 230 #endif /* 0 */
 231
 232         if(!NT_STATUS_IS_OK(pdb_init_sam(&sampass)))
 233                 return False;
 234
 235         /* JRA. This is ok as it is only used for generating the challenge. */
 236         become_root();
 237         ret=pdb_getsampwnam(sampass, mach_acct);
 238         unbecome_root();
 239
 240         if (ret==False) {
 241                 DEBUG(0,("get_md4pw: Workstation %s: no account in domain\n", mach_acct));
 242                 pdb_free_sam(&sampass);
 243                 return False;
 244         }
 245
 246         acct_ctrl = pdb_get_acct_ctrl(sampass);
 247         if (!(acct_ctrl & ACB_DISABLED) &&
 248             ((acct_ctrl & ACB_DOMTRUST) ||
 249              (acct_ctrl & ACB_WSTRUST) ||
 250              (acct_ctrl & ACB_SVRTRUST)) &&
 251             ((pass=pdb_get_nt_passwd(sampass)) != NULL)) {
 252                 memcpy(md4pw, pass, 16);
 253                 dump_data(5, md4pw, 16);
 254                 pdb_free_sam(&sampass);
 255                 return True;
 256         }
 257
 258         DEBUG(0,("get_md4pw: Workstation %s: no account in domain\n", mach_acct));
 259         pdb_free_sam(&sampass);
 260         return False;
 261
 262 }
 263
 264 /*************************************************************************
 265  _net_req_chal
 266  *************************************************************************/
 267
 268 NTSTATUS _net_req_chal(pipes_struct *p, NET_Q_REQ_CHAL *q_u, NET_R_REQ_CHAL *r_u)
 269 {
 270         if (!p->dc) {
 271                 p->dc = TALLOC_ZERO_P(p->pipe_state_mem_ctx, struct dcinfo);
 272                 if (!p->dc) {
 273                         return NT_STATUS_NO_MEMORY;
 274                 }
 275         } else {
 276                 DEBUG(10,("_net_req_chal: new challenge requested. Clearing old state.\n"));
 277                 ZERO_STRUCTP(p->dc);
 278         }
 279
 280         rpcstr_pull(p->dc->remote_machine,
 281                         q_u->uni_logon_clnt.buffer,
 282                         sizeof(fstring),q_u->uni_logon_clnt.uni_str_len*2,0);
 283
 284         /* Save the client challenge to the server. */
 285         memcpy(p->dc->clnt_chal.data, q_u->clnt_chal.data, sizeof(q_u->clnt_chal.data));
 286
 287         /* Create a server challenge for the client */
 288         /* Set this to a random value. */
 289         generate_random_buffer(p->dc->srv_chal.data, 8);
 290
 291         /* set up the LSA REQUEST CHALLENGE response */
 292         init_net_r_req_chal(r_u, &p->dc->srv_chal, NT_STATUS_OK);
 293
 294         p->dc->challenge_sent = True;
 295
 296         return NT_STATUS_OK;
 297 }
 298
 299 /*************************************************************************
 300  init_net_r_auth:
 301  *************************************************************************/
 302
 303 static void init_net_r_auth(NET_R_AUTH *r_a, DOM_CHAL *resp_cred, NTSTATUS status)
 304 {
 305         memcpy(r_a->srv_chal.data, resp_cred->data, sizeof(resp_cred->data));
 306         r_a->status = status;
 307 }
 308
 309 /*************************************************************************
 310  _net_auth. Create the initial credentials.
 311  *************************************************************************/
 312
 313 NTSTATUS _net_auth(pipes_struct *p, NET_Q_AUTH *q_u, NET_R_AUTH *r_u)
 314 {
 315         fstring mach_acct;
 316         fstring remote_machine;
 317         DOM_CHAL srv_chal_out;
 318
 319         if (!p->dc || !p->dc->challenge_sent) {
 320                 return NT_STATUS_ACCESS_DENIED;
 321         }
 322
 323         rpcstr_pull(mach_acct, q_u->clnt_id.uni_acct_name.buffer,sizeof(fstring),
 324                                 q_u->clnt_id.uni_acct_name.uni_str_len*2,0);
 325         rpcstr_pull(remote_machine, q_u->clnt_id.uni_comp_name.buffer,sizeof(fstring),
 326                                 q_u->clnt_id.uni_comp_name.uni_str_len*2,0);
 327
 328         if (!get_md4pw((char *)p->dc->mach_pw, mach_acct)) {
 329                 DEBUG(0,("_net_auth: creds_server_check failed. Failed to "
 330                         "get pasword for machine account %s "
 331                         "from client %s\n",
 332                         mach_acct, remote_machine ));
 333                 return NT_STATUS_ACCESS_DENIED;
 334         }
 335
 336         /* From the client / server challenges and md4 password, generate sess key */
 337         creds_server_init(0,                    /* No neg flags. */
 338                         p->dc,
 339                         &p->dc->clnt_chal,      /* Stored client chal. */
 340                         &p->dc->srv_chal,       /* Stored server chal. */
 341                         p->dc->mach_pw,
 342                         &srv_chal_out);
 343
 344         /* Check client credentials are valid. */
 345         if (!creds_server_check(p->dc, &q_u->clnt_chal)) {
 346                 DEBUG(0,("_net_auth: creds_server_check failed. Rejecting auth "
 347                         "request from client %s machine account %s\n",
 348                         remote_machine, mach_acct ));
 349                 return NT_STATUS_ACCESS_DENIED;
 350         }
 351
 352         fstrcpy(p->dc->mach_acct, mach_acct);
 353         fstrcpy(p->dc->remote_machine, remote_machine);
 354         p->dc->authenticated = True;
 355
 356         /* set up the LSA AUTH response */
 357         /* Return the server credentials. */
 358         init_net_r_auth(r_u, &srv_chal_out, NT_STATUS_OK);
 359
 360         return r_u->status;
 361 }
 362
 363 /*************************************************************************
 364  init_net_r_auth_2:
 365  *************************************************************************/
 366
 367 static void init_net_r_auth_2(NET_R_AUTH_2 *r_a,
 368                               DOM_CHAL *resp_cred, NEG_FLAGS *flgs, NTSTATUS status)
 369 {
 370         memcpy(r_a->srv_chal.data, resp_cred->data, sizeof(resp_cred->data));
 371         memcpy(&r_a->srv_flgs, flgs, sizeof(r_a->srv_flgs));
 372         r_a->status = status;
 373 }
 374
 375 /*************************************************************************
 376  _net_auth_2
 377  *************************************************************************/
 378
 379 NTSTATUS _net_auth_2(pipes_struct *p, NET_Q_AUTH_2 *q_u, NET_R_AUTH_2 *r_u)
 380 {
 381         NEG_FLAGS srv_flgs;
 382         fstring mach_acct;
 383         fstring remote_machine;
 384         DOM_CHAL srv_chal_out;
 385
 386         rpcstr_pull(mach_acct, q_u->clnt_id.uni_acct_name.buffer,sizeof(fstring),
 387                                 q_u->clnt_id.uni_acct_name.uni_str_len*2,0);
 388         rpcstr_pull(remote_machine, q_u->clnt_id.uni_comp_name.buffer,sizeof(fstring),
 389                                 q_u->clnt_id.uni_comp_name.uni_str_len*2,0);
 390
 391         if (!p->dc || !p->dc->challenge_sent) {
 392                 DEBUG(0,("_net_auth2: no challenge sent to client %s\n",
 393                         remote_machine ));
 394                 return NT_STATUS_ACCESS_DENIED;
 395         }
 396
 397         if ( (lp_server_schannel() == True) &&
 398              ((q_u->clnt_flgs.neg_flags & NETLOGON_NEG_SCHANNEL) == 0) ) {
 399
 400                 /* schannel must be used, but client did not offer it. */
 401                 DEBUG(0,("_net_auth2: schannel required but client failed "
 402                         "to offer it. Client was %s\n",
 403                         mach_acct ));
 404                 return NT_STATUS_ACCESS_DENIED;
 405         }
 406
 407         if (!get_md4pw((char *)p->dc->mach_pw, mach_acct)) {
 408                 DEBUG(0,("_net_auth2: failed to get machine password for "
 409                         "account %s\n",
 410                         mach_acct ));
 411                 return NT_STATUS_ACCESS_DENIED;
 412         }
 413
 414         /* From the client / server challenges and md4 password, generate sess key */
 415         creds_server_init(q_u->clnt_flgs.neg_flags,
 416                         p->dc,
 417                         &p->dc->clnt_chal,      /* Stored client chal. */
 418                         &p->dc->srv_chal,       /* Stored server chal. */
 419                         p->dc->mach_pw,
 420                         &srv_chal_out);
 421
 422         /* Check client credentials are valid. */
 423         if (!creds_server_check(p->dc, &q_u->clnt_chal)) {
 424                 DEBUG(0,("_net_auth2: creds_server_check failed. Rejecting auth "
 425                         "request from client %s machine account %s\n",
 426                         remote_machine, mach_acct ));
 427                 return NT_STATUS_ACCESS_DENIED;
 428         }
 429
 430         srv_flgs.neg_flags = 0x000001ff;
 431
 432         if (lp_server_schannel() != False) {
 433                 srv_flgs.neg_flags |= NETLOGON_NEG_SCHANNEL;
 434         }
 435
 436         /* set up the LSA AUTH 2 response */
 437         init_net_r_auth_2(r_u, &srv_chal_out, &srv_flgs, NT_STATUS_OK);
 438
 439         fstrcpy(p->dc->mach_acct, mach_acct);
 440         fstrcpy(p->dc->remote_machine, remote_machine);
 441         fstrcpy(p->dc->domain, lp_workgroup() );
 442
 443         p->dc->authenticated = True;
 444
 445         /* Store off the state so we can continue after client disconnect. */
 446         become_root();
 447         secrets_store_schannel_session_info(p->mem_ctx,
 448                                         get_remote_machine_name(),
 449                                         p->dc);
 450         unbecome_root();
 451
 452         return r_u->status;
 453 }
 454
 455 /*************************************************************************
 456  _net_srv_pwset
 457  *************************************************************************/
 458
 459 NTSTATUS _net_srv_pwset(pipes_struct *p, NET_Q_SRV_PWSET *q_u, NET_R_SRV_PWSET *r_u)
 460 {
 461         NTSTATUS status = NT_STATUS_ACCESS_DENIED;
 462         fstring workstation;
 463         SAM_ACCOUNT *sampass=NULL;
 464         BOOL ret = False;
 465         unsigned char pwd[16];
 466         int i;
 467         uint32 acct_ctrl;
 468         DOM_CRED cred_out;
 469         const uchar *old_pw;
 470
 471         DEBUG(5,("_net_srv_pwset: %d\n", __LINE__));
 472
 473         /* We need the workstation name for the creds lookup. */
 474         rpcstr_pull(workstation,q_u->clnt_id.login.uni_comp_name.buffer,
 475                     sizeof(workstation),q_u->clnt_id.login.uni_comp_name.uni_str_len*2,0);
 476
 477         if (!p->dc) {
 478                 /* Restore the saved state of the netlogon creds. */
 479                 become_root();
 480                 ret = secrets_restore_schannel_session_info(p->pipe_state_mem_ctx,
 481                                                         get_remote_machine_name(),
 482                                                         &p->dc);
 483                 unbecome_root();
 484                 if (!ret) {
 485                         return NT_STATUS_INVALID_HANDLE;
 486                 }
 487         }
 488
 489         if (!p->dc || !p->dc->authenticated) {
 490                 return NT_STATUS_INVALID_HANDLE;
 491         }
 492
 493         DEBUG(3,("_net_srv_pwset: Server Password Set by Wksta:[%s] on account [%s]\n",
 494                         workstation, p->dc->mach_acct));
 495
 496         /* Step the creds chain forward. */
 497         if (!creds_server_step(p->dc, &q_u->clnt_id.cred, &cred_out)) {
 498                 DEBUG(2,("_net_srv_pwset: creds_server_step failed. Rejecting auth "
 499                         "request from client %s machine account %s\n",
 500                         p->dc->remote_machine, p->dc->mach_acct ));
 501                 return NT_STATUS_INVALID_PARAMETER;
 502         }
 503
 504         /* We must store the creds state after an update. */
 505         become_root();
 506         secrets_store_schannel_session_info(p->pipe_state_mem_ctx,
 507                                                 get_remote_machine_name(),
 508                                                 p->dc);
 509         pdb_init_sam(&sampass);
 510         ret=pdb_getsampwnam(sampass, p->dc->mach_acct);
 511         unbecome_root();
 512
 513         /* Ensure the account exists and is a machine account. */
 514
 515         acct_ctrl = pdb_get_acct_ctrl(sampass);
 516
 517         if (!(ret
 518               && (acct_ctrl & ACB_WSTRUST ||
 519                       acct_ctrl & ACB_SVRTRUST ||
 520                       acct_ctrl & ACB_DOMTRUST))) {
 521                 pdb_free_sam(&sampass);
 522                 return NT_STATUS_NO_SUCH_USER;
 523         }
 524
 525         if (pdb_get_acct_ctrl(sampass) & ACB_DISABLED) {
 526                 pdb_free_sam(&sampass);
 527                 return NT_STATUS_ACCOUNT_DISABLED;
 528         }
 529
 530         /* Woah - what does this to to the credential chain ? JRA */
 531         cred_hash3( pwd, q_u->pwd, p->dc->sess_key, 0);
 532
 533         DEBUG(100,("Server password set : new given value was :\n"));
 534         for(i = 0; i < sizeof(pwd); i++)
 535                 DEBUG(100,("%02X ", pwd[i]));
 536         DEBUG(100,("\n"));
 537
 538         old_pw = pdb_get_nt_passwd(sampass);
 539
 540         if (old_pw && memcmp(pwd, old_pw, 16) == 0) {
 541                 /* Avoid backend modificiations and other fun if the
 542                    client changed the password to the *same thing* */
 543
 544                 ret = True;
 545         } else {
 546
 547                 /* LM password should be NULL for machines */
 548                 if (!pdb_set_lanman_passwd(sampass, NULL, PDB_CHANGED)) {
 549                         pdb_free_sam(&sampass);
 550                         return NT_STATUS_NO_MEMORY;
 551                 }
 552
 553                 if (!pdb_set_nt_passwd(sampass, pwd, PDB_CHANGED)) {
 554                         pdb_free_sam(&sampass);
 555                         return NT_STATUS_NO_MEMORY;
 556                 }
 557
 558                 if (!pdb_set_pass_changed_now(sampass)) {
 559                         pdb_free_sam(&sampass);
 560                         /* Not quite sure what this one qualifies as, but this will do */
 561                         return NT_STATUS_UNSUCCESSFUL;
 562                 }
 563
 564                 become_root();
 565                 r_u->status = pdb_update_sam_account (sampass);
 566                 unbecome_root();
 567         }
 568
 569         /* set up the LSA Server Password Set response */
 570         init_net_r_srv_pwset(r_u, &cred_out, status);
 571
 572         pdb_free_sam(&sampass);
 573         return r_u->status;
 574 }
 575
 576 /*************************************************************************
 577  _net_sam_logoff:
 578  *************************************************************************/
 579
 580 NTSTATUS _net_sam_logoff(pipes_struct *p, NET_Q_SAM_LOGOFF *q_u, NET_R_SAM_LOGOFF *r_u)
 581 {
 582         if (!get_valid_user_struct(p->vuid))
 583                 return NT_STATUS_NO_SUCH_USER;
 584
 585         if (!p->dc) {
 586                 /* Restore the saved state of the netlogon creds. */
 587                 BOOL ret;
 588
 589                 become_root();
 590                 ret = secrets_restore_schannel_session_info(p->pipe_state_mem_ctx,
 591                                                 get_remote_machine_name(),
 592                                                 &p->dc);
 593                 unbecome_root();
 594                 if (!ret) {
 595                         return NT_STATUS_INVALID_HANDLE;
 596                 }
 597         }
 598
 599         if (!p->dc || !p->dc->authenticated) {
 600                 return NT_STATUS_INVALID_HANDLE;
 601         }
 602
 603         r_u->buffer_creds = 1; /* yes, we have valid server credentials */
 604
 605         /* checks and updates credentials.  creates reply credentials */
 606         if (!creds_server_step(p->dc, &q_u->sam_id.client.cred, &r_u->srv_creds)) {
 607                 DEBUG(2,("_net_sam_logoff: creds_server_step failed. Rejecting auth "
 608                         "request from client %s machine account %s\n",
 609                         p->dc->remote_machine, p->dc->mach_acct ));
 610                 return NT_STATUS_INVALID_PARAMETER;
 611         }
 612
 613         /* We must store the creds state after an update. */
 614         become_root();
 615         secrets_store_schannel_session_info(p->pipe_state_mem_ctx,
 616                                         get_remote_machine_name(),
 617                                         p->dc);
 618         unbecome_root();
 619
 620         r_u->status = NT_STATUS_OK;
 621         return r_u->status;
 622 }
 623
 624
 625 /*******************************************************************
 626  gets a domain user's groups from their already-calculated NT_USER_TOKEN
 627  ********************************************************************/
 628 static NTSTATUS nt_token_to_group_list(TALLOC_CTX *mem_ctx,
 629                                        const DOM_SID *domain_sid,
 630                                        size_t num_sids,
 631                                        const DOM_SID *sids,
 632                                        int *numgroups, DOM_GID **pgids)
 633 {
 634         int i;
 635
 636         *numgroups=0;
 637         *pgids = NULL;
 638
 639         for (i=0; i<num_sids; i++) {
 640                 DOM_GID gid;
 641                 if (!sid_peek_check_rid(domain_sid, &sids[i], &gid.g_rid)) {
 642                         continue;
 643                 }
 644                 gid.attr = (SE_GROUP_MANDATORY|SE_GROUP_ENABLED_BY_DEFAULT|
 645                             SE_GROUP_ENABLED);
 646                 ADD_TO_ARRAY(mem_ctx, DOM_GID, gid, pgids, numgroups);
 647                 if (*pgids == NULL) {
 648                         return NT_STATUS_NO_MEMORY;
 649                 }
 650         }
 651         return NT_STATUS_OK;
 652 }
 653
 654 /*************************************************************************
 655  _net_sam_logon
 656  *************************************************************************/
 657
 658 static NTSTATUS _net_sam_logon_internal(pipes_struct *p,
 659                                         NET_Q_SAM_LOGON *q_u,
 660                                         NET_R_SAM_LOGON *r_u,
 661                                         BOOL process_creds)
 662 {
 663         NTSTATUS status = NT_STATUS_OK;
 664         NET_USER_INFO_3 *usr_info = NULL;
 665         NET_ID_INFO_CTR *ctr = q_u->sam_id.ctr;
 666         UNISTR2 *uni_samlogon_user = NULL;
 667         UNISTR2 *uni_samlogon_domain = NULL;
 668         UNISTR2 *uni_samlogon_workstation = NULL;
 669         fstring nt_username, nt_domain, nt_workstation;
 670         auth_usersupplied_info *user_info = NULL;
 671         auth_serversupplied_info *server_info = NULL;
 672         SAM_ACCOUNT *sampw;
 673         struct auth_context *auth_context = NULL;
 674
 675         usr_info = TALLOC_P(p->mem_ctx, NET_USER_INFO_3);
 676         if (!usr_info)
 677                 return NT_STATUS_NO_MEMORY;
 678
 679         ZERO_STRUCTP(usr_info);
 680
 681         /* store the user information, if there is any. */
 682         r_u->user = usr_info;
 683         r_u->auth_resp = 1; /* authoritative response */
 684         if (q_u->validation_level != 2 && q_u->validation_level != 3) {
 685                 DEBUG(0,("_net_sam_logon: bad validation_level value %d.\n", (int)q_u->validation_level ));
 686                 return NT_STATUS_ACCESS_DENIED;
 687         }
 688         /* We handle the return of USER_INFO_2 instead of 3 in the parse return. Sucks, I know... */
 689         r_u->switch_value = q_u->validation_level; /* indicates type of validation user info */
 690         r_u->buffer_creds = 1; /* Ensure we always return server creds. */
 691
 692         if (!get_valid_user_struct(p->vuid))
 693                 return NT_STATUS_NO_SUCH_USER;
 694
 695         if (process_creds) {
 696                 if (!p->dc) {
 697                         /* Restore the saved state of the netlogon creds. */
 698                         BOOL ret;
 699
 700                         become_root();
 701                         ret = secrets_restore_schannel_session_info(p->pipe_state_mem_ctx,
 702                                         get_remote_machine_name(),
 703                                         &p->dc);
 704                         unbecome_root();
 705                         if (!ret) {
 706                                 return NT_STATUS_INVALID_HANDLE;
 707                         }
 708                 }
 709
 710                 if (!p->dc || !p->dc->authenticated) {
 711                         return NT_STATUS_INVALID_HANDLE;
 712                 }
 713         }
 714
 715         if ( (lp_server_schannel() == True) && (p->auth.auth_type != PIPE_AUTH_TYPE_SCHANNEL) ) {
 716                 /* 'server schannel = yes' should enforce use of
 717                    schannel, the client did offer it in auth2, but
 718                    obviously did not use it. */
 719                 DEBUG(0,("_net_sam_logon: client %s not using schannel for netlogon\n",
 720                         get_remote_machine_name() ));
 721                 return NT_STATUS_ACCESS_DENIED;
 722         }
 723
 724         if (process_creds) {
 725                 /* checks and updates credentials.  creates reply credentials */
 726                 if (!creds_server_step(p->dc, &q_u->sam_id.client.cred,  &r_u->srv_creds)) {
 727                         DEBUG(2,("_net_sam_logon: creds_server_step failed. Rejecting auth "
 728                                 "request from client %s machine account %s\n",
 729                                 p->dc->remote_machine, p->dc->mach_acct ));
 730                         return NT_STATUS_INVALID_PARAMETER;
 731                 }
 732
 733                 /* We must store the creds state after an update. */
 734                 become_root();
 735                 secrets_store_schannel_session_info(p->pipe_state_mem_ctx,
 736                                         get_remote_machine_name(),
 737                                         p->dc);
 738                 unbecome_root();
 739         }
 740
 741
 742         switch (q_u->sam_id.logon_level) {
 743         case INTERACTIVE_LOGON_TYPE:
 744                 uni_samlogon_user = &ctr->auth.id1.uni_user_name;
 745                 uni_samlogon_domain = &ctr->auth.id1.uni_domain_name;
 746
 747                 uni_samlogon_workstation = &ctr->auth.id1.uni_wksta_name;
 748
 749                 DEBUG(3,("SAM Logon (Interactive). Domain:[%s].  ", lp_workgroup()));
 750                 break;
 751         case NET_LOGON_TYPE:
 752                 uni_samlogon_user = &ctr->auth.id2.uni_user_name;
 753                 uni_samlogon_domain = &ctr->auth.id2.uni_domain_name;
 754                 uni_samlogon_workstation = &ctr->auth.id2.uni_wksta_name;
 755
 756                 DEBUG(3,("SAM Logon (Network). Domain:[%s].  ", lp_workgroup()));
 757                 break;
 758         default:
 759                 DEBUG(2,("SAM Logon: unsupported switch value\n"));
 760                 return NT_STATUS_INVALID_INFO_CLASS;
 761         } /* end switch */
 762
 763         rpcstr_pull(nt_username,uni_samlogon_user->buffer,sizeof(nt_username),uni_samlogon_user->uni_str_len*2,0);
 764         rpcstr_pull(nt_domain,uni_samlogon_domain->buffer,sizeof(nt_domain),uni_samlogon_domain->uni_str_len*2,0);
 765         rpcstr_pull(nt_workstation,uni_samlogon_workstation->buffer,sizeof(nt_workstation),uni_samlogon_workstation->uni_str_len*2,0);
 766
 767         DEBUG(3,("User:[%s@%s] Requested Domain:[%s]\n", nt_username, nt_workstation, nt_domain));
 768         fstrcpy(current_user_info.smb_name, nt_username);
 769         sub_set_smb_name(nt_username);
 770
 771         DEBUG(5,("Attempting validation level %d for unmapped username %s.\n", q_u->sam_id.ctr->switch_value, nt_username));
 772
 773         status = NT_STATUS_OK;
 774
 775         switch (ctr->switch_value) {
 776         case NET_LOGON_TYPE:
 777         {
 778                 const char *wksname = nt_workstation;
 779
 780                 if (!NT_STATUS_IS_OK(status = make_auth_context_fixed(&auth_context, ctr->auth.id2.lm_chal))) {
 781                         return status;
 782                 }
 783
 784                 /* For a network logon, the workstation name comes in with two
 785                  * backslashes in the front. Strip them if they are there. */
 786
 787                 if (*wksname == '\\') wksname++;
 788                 if (*wksname == '\\') wksname++;
 789
 790                 /* Standard challenge/response authenticaion */
 791                 if (!make_user_info_netlogon_network(&user_info,
 792                                                      nt_username, nt_domain,
 793                                                      wksname,
 794                                                      ctr->auth.id2.param_ctrl,
 795                                                      ctr->auth.id2.lm_chal_resp.buffer,
 796                                                      ctr->auth.id2.lm_chal_resp.str_str_len,
 797                                                      ctr->auth.id2.nt_chal_resp.buffer,
 798                                                      ctr->auth.id2.nt_chal_resp.str_str_len)) {
 799                         status = NT_STATUS_NO_MEMORY;
 800                 }
 801                 break;
 802         }
 803         case INTERACTIVE_LOGON_TYPE:
 804                 /* 'Interactive' authentication, supplies the password in its
 805                    MD4 form, encrypted with the session key.  We will convert
 806                    this to challenge/response for the auth subsystem to chew
 807                    on */
 808         {
 809                 const uint8 *chal;
 810
 811                 if (!NT_STATUS_IS_OK(status = make_auth_context_subsystem(&auth_context))) {
 812                         return status;
 813                 }
 814
 815                 chal = auth_context->get_ntlm_challenge(auth_context);
 816
 817                 if (!make_user_info_netlogon_interactive(&user_info,
 818                                                          nt_username, nt_domain,
 819                                                          nt_workstation,
 820                                                          ctr->auth.id1.param_ctrl,
 821                                                          chal,
 822                                                          ctr->auth.id1.lm_owf.data,
 823                                                          ctr->auth.id1.nt_owf.data,
 824                                                          p->dc->sess_key)) {
 825                         status = NT_STATUS_NO_MEMORY;
 826                 }
 827                 break;
 828         }
 829         default:
 830                 DEBUG(2,("SAM Logon: unsupported switch value\n"));
 831                 return NT_STATUS_INVALID_INFO_CLASS;
 832         } /* end switch */
 833
 834         if ( NT_STATUS_IS_OK(status) ) {
 835                 status = auth_context->check_ntlm_password(auth_context,
 836                         user_info, &server_info);
 837         }
 838
 839         (auth_context->free)(&auth_context);
 840         free_user_info(&user_info);
 841
 842         DEBUG(5, ("_net_sam_logon: check_password returned status %s\n",
 843                   nt_errstr(status)));
 844
 845         /* Check account and password */
 846
 847         if (!NT_STATUS_IS_OK(status)) {
 848                 /* If we don't know what this domain is, we need to
 849                    indicate that we are not authoritative.  This
 850                    allows the client to decide if it needs to try
 851                    a local user.  Fix by jpjanosi@us.ibm.com, #2976 */
 852                 if ( NT_STATUS_EQUAL(status, NT_STATUS_NO_SUCH_USER)
 853                      && !strequal(nt_domain, get_global_sam_name())
 854                      && !is_trusted_domain(nt_domain) )
 855                         r_u->auth_resp = 0; /* We are not authoritative */
 856
 857                 talloc_free(server_info);
 858                 return status;
 859         }
 860
 861         if (server_info->guest) {
 862                 /* We don't like guest domain logons... */
 863                 DEBUG(5,("_net_sam_logon: Attempted domain logon as GUEST "
 864                          "denied.\n"));
 865                 talloc_free(server_info);
 866                 return NT_STATUS_LOGON_FAILURE;
 867         }
 868
 869         /* This is the point at which, if the login was successful, that
 870            the SAM Local Security Authority should record that the user is
 871            logged in to the domain.  */
 872
 873         {
 874                 DOM_GID *gids = NULL;
 875                 const DOM_SID *user_sid = NULL;
 876                 const DOM_SID *group_sid = NULL;
 877                 DOM_SID domain_sid;
 878                 uint32 user_rid, group_rid;
 879
 880                 int num_gids = 0;
 881                 pstring my_name;
 882                 fstring user_sid_string;
 883                 fstring group_sid_string;
 884                 unsigned char user_session_key[16];
 885                 unsigned char lm_session_key[16];
 886                 unsigned char pipe_session_key[16];
 887
 888                 sampw = server_info->sam_account;
 889
 890                 /* set up pointer indicating user/password failed to be
 891                  * found */
 892                 usr_info->ptr_user_info = 0;
 893
 894                 user_sid = pdb_get_user_sid(sampw);
 895                 group_sid = pdb_get_group_sid(sampw);
 896
 897                 sid_copy(&domain_sid, user_sid);
 898                 sid_split_rid(&domain_sid, &user_rid);
 899
 900                 if (!sid_peek_check_rid(&domain_sid, group_sid, &group_rid)) {
 901                         DEBUG(1, ("_net_sam_logon: user %s\\%s has user sid "
 902                                   "%s\n but group sid %s.\n"
 903                                   "The conflicting domain portions are not "
 904                                   "supported for NETLOGON calls\n",
 905                                   pdb_get_domain(sampw),
 906                                   pdb_get_username(sampw),
 907                                   sid_to_string(user_sid_string, user_sid),
 908                                   sid_to_string(group_sid_string, group_sid)));
 909                         return NT_STATUS_UNSUCCESSFUL;
 910                 }
 911
 912
 913                 if(server_info->login_server) {
 914                         pstrcpy(my_name, server_info->login_server);
 915                 } else {
 916                         pstrcpy(my_name, global_myname());
 917                 }
 918
 919                 status = nt_token_to_group_list(p->mem_ctx, &domain_sid,
 920                                                 server_info->num_sids,
 921                                                 server_info->sids,
 922                                                 &num_gids, &gids);
 923
 924                 if (!NT_STATUS_IS_OK(status)) {
 925                         return status;
 926                 }
 927
 928                 if (server_info->user_session_key.length) {
 929                         memcpy(user_session_key,
 930                                server_info->user_session_key.data,
 931                                MIN(sizeof(user_session_key),
 932                                    server_info->user_session_key.length));
 933                         if (process_creds) {
 934                                 /* Get the pipe session key from the creds. */
 935                                 memcpy(pipe_session_key, p->dc->sess_key, 16);
 936                         } else {
 937                                 /* Get the pipe session key from the schannel. */
 938                                 if (p->auth.auth_type != PIPE_AUTH_TYPE_SCHANNEL || p->auth.a_u.schannel_auth == NULL) {
 939                                         return NT_STATUS_INVALID_HANDLE;
 940                                 }
 941                                 memcpy(pipe_session_key, p->auth.a_u.schannel_auth->sess_key, 16);
 942                         }
 943                         SamOEMhash(user_session_key, pipe_session_key, 16);
 944                         memset(pipe_session_key, '\0', 16);
 945                 }
 946                 if (server_info->lm_session_key.length) {
 947                         memcpy(lm_session_key,
 948                                server_info->lm_session_key.data,
 949                                MIN(sizeof(lm_session_key),
 950                                    server_info->lm_session_key.length));
 951                         if (process_creds) {
 952                                 /* Get the pipe session key from the creds. */
 953                                 memcpy(pipe_session_key, p->dc->sess_key, 16);
 954                         } else {
 955                                 /* Get the pipe session key from the schannel. */
 956                                 if (p->auth.auth_type != PIPE_AUTH_TYPE_SCHANNEL || p->auth.a_u.schannel_auth == NULL) {
 957                                         return NT_STATUS_INVALID_HANDLE;
 958                                 }
 959                                 memcpy(pipe_session_key, p->auth.a_u.schannel_auth->sess_key, 16);
 960                         }
 961                         SamOEMhash(lm_session_key, pipe_session_key, 16);
 962                         memset(pipe_session_key, '\0', 16);
 963                 }
 964
 965                 init_net_user_info3(p->mem_ctx, usr_info,
 966                                     user_rid,
 967                                     group_rid,
 968                                     pdb_get_username(sampw),
 969                                     pdb_get_fullname(sampw),
 970                                     pdb_get_homedir(sampw),
 971                                     pdb_get_dir_drive(sampw),
 972                                     pdb_get_logon_script(sampw),
 973                                     pdb_get_profile_path(sampw),
 974                                     pdb_get_logon_time(sampw),
 975                                     get_time_t_max(),
 976                                     get_time_t_max(),
 977                                     pdb_get_pass_last_set_time(sampw),
 978                                     pdb_get_pass_can_change_time(sampw),
 979                                     pdb_get_pass_must_change_time(sampw),
 980
 981                                     0, /* logon_count */
 982                                     0, /* bad_pw_count */
 983                                     num_gids,    /* uint32 num_groups */
 984                                     gids    , /* DOM_GID *gids */
 985                                     0x20    , /* uint32 user_flgs (?) */
 986                                     server_info->user_session_key.length ? user_session_key : NULL,
 987                                     server_info->lm_session_key.length ? lm_session_key : NULL,
 988                                     my_name     , /* char *logon_srv */
 989                                     pdb_get_domain(sampw),
 990                                     &domain_sid);     /* DOM_SID *dom_sid */
 991                 ZERO_STRUCT(user_session_key);
 992                 ZERO_STRUCT(lm_session_key);
 993         }
 994         talloc_free(server_info);
 995         return status;
 996 }
 997
 998 /*************************************************************************
 999  _net_sam_logon
1000  *************************************************************************/
1001
1002 NTSTATUS _net_sam_logon(pipes_struct *p, NET_Q_SAM_LOGON *q_u, NET_R_SAM_LOGON *r_u)
1003 {
1004         return _net_sam_logon_internal(p, q_u, r_u, True);
1005 }
1006
1007 /*************************************************************************
1008  _net_sam_logon_ex - no credential chaining. Map into net sam logon.
1009  *************************************************************************/
1010
1011 NTSTATUS _net_sam_logon_ex(pipes_struct *p, NET_Q_SAM_LOGON_EX *q_u, NET_R_SAM_LOGON_EX *r_u)
1012 {
1013         NET_Q_SAM_LOGON q;
1014         NET_R_SAM_LOGON r;
1015
1016         ZERO_STRUCT(q);
1017         ZERO_STRUCT(r);
1018
1019         /* Only allow this if the pipe is protected. */
1020         if (p->auth.auth_type != PIPE_AUTH_TYPE_SCHANNEL) {
1021                 DEBUG(0,("_net_sam_logon_ex: client %s not using schannel for netlogon\n",
1022                         get_remote_machine_name() ));
1023                 return NT_STATUS_INVALID_PARAMETER;
1024         }
1025
1026         /* Map a NET_Q_SAM_LOGON_EX to NET_Q_SAM_LOGON. */
1027         q.validation_level = q_u->validation_level;
1028
1029         /* Map a DOM_SAM_INFO_EX into a DOM_SAM_INFO with no creds. */
1030         q.sam_id.client.login = q_u->sam_id.client;
1031         q.sam_id.logon_level = q_u->sam_id.logon_level;
1032         q.sam_id.ctr = q_u->sam_id.ctr;
1033
1034         r_u->status = _net_sam_logon_internal(p, &q, &r, False);
1035
1036         if (!NT_STATUS_IS_OK(r_u->status)) {
1037                 return r_u->status;
1038         }
1039
1040         /* Map the NET_R_SAM_LOGON to NET_R_SAM_LOGON_EX. */
1041         r_u->switch_value = r.switch_value;
1042         r_u->user = r.user;
1043         r_u->auth_resp = r.auth_resp;
1044         r_u->flags = 0; /* FIXME ! */
1045         return r_u->status;
1046 }
1047
1048 /*************************************************************************
1049  _ds_enum_dom_trusts
1050  *************************************************************************/
1051 #if 0   /* JERRY -- not correct */
1052 NTSTATUS _ds_enum_dom_trusts(pipes_struct *p, DS_Q_ENUM_DOM_TRUSTS *q_u,
1053                              DS_R_ENUM_DOM_TRUSTS *r_u)
1054 {
1055         NTSTATUS status = NT_STATUS_OK;
1056
1057         /* TODO: According to MSDN, the can only be executed against a
1058            DC or domain member running Windows 2000 or later.  Need
1059            to test against a standalone 2k server and see what it
1060            does.  A windows 2000 DC includes its own domain in the
1061            list.  --jerry */
1062
1063         return status;
1064 }
1065 #endif  /* JERRY */