source3/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         struct samu *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                 TALLOC_FREE(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                 TALLOC_FREE(sampass);
 255                 return True;
 256         }
 257
 258         DEBUG(0,("get_md4pw: Workstation %s: no account in domain\n", mach_acct));
 259         TALLOC_FREE(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
 389         /* We use this as the key to store the creds. */
 390         rpcstr_pull(remote_machine, q_u->clnt_id.uni_comp_name.buffer,sizeof(fstring),
 391                                 q_u->clnt_id.uni_comp_name.uni_str_len*2,0);
 392
 393         if (!p->dc || !p->dc->challenge_sent) {
 394                 DEBUG(0,("_net_auth2: no challenge sent to client %s\n",
 395                         remote_machine ));
 396                 return NT_STATUS_ACCESS_DENIED;
 397         }
 398
 399         if ( (lp_server_schannel() == True) &&
 400              ((q_u->clnt_flgs.neg_flags & NETLOGON_NEG_SCHANNEL) == 0) ) {
 401
 402                 /* schannel must be used, but client did not offer it. */
 403                 DEBUG(0,("_net_auth2: schannel required but client failed "
 404                         "to offer it. Client was %s\n",
 405                         mach_acct ));
 406                 return NT_STATUS_ACCESS_DENIED;
 407         }
 408
 409         if (!get_md4pw((char *)p->dc->mach_pw, mach_acct)) {
 410                 DEBUG(0,("_net_auth2: failed to get machine password for "
 411                         "account %s\n",
 412                         mach_acct ));
 413                 return NT_STATUS_ACCESS_DENIED;
 414         }
 415
 416         /* From the client / server challenges and md4 password, generate sess key */
 417         creds_server_init(q_u->clnt_flgs.neg_flags,
 418                         p->dc,
 419                         &p->dc->clnt_chal,      /* Stored client chal. */
 420                         &p->dc->srv_chal,       /* Stored server chal. */
 421                         p->dc->mach_pw,
 422                         &srv_chal_out);
 423
 424         /* Check client credentials are valid. */
 425         if (!creds_server_check(p->dc, &q_u->clnt_chal)) {
 426                 DEBUG(0,("_net_auth2: creds_server_check failed. Rejecting auth "
 427                         "request from client %s machine account %s\n",
 428                         remote_machine, mach_acct ));
 429                 return NT_STATUS_ACCESS_DENIED;
 430         }
 431
 432         srv_flgs.neg_flags = 0x000001ff;
 433
 434         if (lp_server_schannel() != False) {
 435                 srv_flgs.neg_flags |= NETLOGON_NEG_SCHANNEL;
 436         }
 437
 438         /* set up the LSA AUTH 2 response */
 439         init_net_r_auth_2(r_u, &srv_chal_out, &srv_flgs, NT_STATUS_OK);
 440
 441         fstrcpy(p->dc->mach_acct, mach_acct);
 442         fstrcpy(p->dc->remote_machine, remote_machine);
 443         fstrcpy(p->dc->domain, lp_workgroup() );
 444
 445         p->dc->authenticated = True;
 446
 447         /* Store off the state so we can continue after client disconnect. */
 448         become_root();
 449         secrets_store_schannel_session_info(p->mem_ctx,
 450                                         remote_machine,
 451                                         p->dc);
 452         unbecome_root();
 453
 454         return r_u->status;
 455 }
 456
 457 /*************************************************************************
 458  _net_srv_pwset
 459  *************************************************************************/
 460
 461 NTSTATUS _net_srv_pwset(pipes_struct *p, NET_Q_SRV_PWSET *q_u, NET_R_SRV_PWSET *r_u)
 462 {
 463         NTSTATUS status = NT_STATUS_ACCESS_DENIED;
 464         fstring remote_machine;
 465         struct samu *sampass=NULL;
 466         BOOL ret = False;
 467         unsigned char pwd[16];
 468         int i;
 469         uint32 acct_ctrl;
 470         DOM_CRED cred_out;
 471         const uchar *old_pw;
 472
 473         DEBUG(5,("_net_srv_pwset: %d\n", __LINE__));
 474
 475         /* We need the remote machine name for the creds lookup. */
 476         rpcstr_pull(remote_machine,q_u->clnt_id.login.uni_comp_name.buffer,
 477                     sizeof(remote_machine),q_u->clnt_id.login.uni_comp_name.uni_str_len*2,0);
 478
 479         if ( (lp_server_schannel() == True) && (p->auth.auth_type != PIPE_AUTH_TYPE_SCHANNEL) ) {
 480                 /* 'server schannel = yes' should enforce use of
 481                    schannel, the client did offer it in auth2, but
 482                    obviously did not use it. */
 483                 DEBUG(0,("_net_srv_pwset: client %s not using schannel for netlogon\n",
 484                         remote_machine ));
 485                 return NT_STATUS_ACCESS_DENIED;
 486         }
 487
 488         if (!p->dc) {
 489                 /* Restore the saved state of the netlogon creds. */
 490                 become_root();
 491                 ret = secrets_restore_schannel_session_info(p->pipe_state_mem_ctx,
 492                                                         remote_machine,
 493                                                         &p->dc);
 494                 unbecome_root();
 495                 if (!ret) {
 496                         return NT_STATUS_INVALID_HANDLE;
 497                 }
 498         }
 499
 500         if (!p->dc || !p->dc->authenticated) {
 501                 return NT_STATUS_INVALID_HANDLE;
 502         }
 503
 504         DEBUG(3,("_net_srv_pwset: Server Password Set by remote machine:[%s] on account [%s]\n",
 505                         remote_machine, p->dc->mach_acct));
 506
 507         /* Step the creds chain forward. */
 508         if (!creds_server_step(p->dc, &q_u->clnt_id.cred, &cred_out)) {
 509                 DEBUG(2,("_net_srv_pwset: creds_server_step failed. Rejecting auth "
 510                         "request from client %s machine account %s\n",
 511                         remote_machine, p->dc->mach_acct ));
 512                 return NT_STATUS_INVALID_PARAMETER;
 513         }
 514
 515         /* We must store the creds state after an update. */
 516         become_root();
 517         secrets_store_schannel_session_info(p->pipe_state_mem_ctx,
 518                                                 remote_machine,
 519                                                 p->dc);
 520         pdb_init_sam(&sampass);
 521         ret=pdb_getsampwnam(sampass, p->dc->mach_acct);
 522         unbecome_root();
 523
 524         /* Ensure the account exists and is a machine account. */
 525
 526         acct_ctrl = pdb_get_acct_ctrl(sampass);
 527
 528         if (!(ret
 529               && (acct_ctrl & ACB_WSTRUST ||
 530                       acct_ctrl & ACB_SVRTRUST ||
 531                       acct_ctrl & ACB_DOMTRUST))) {
 532                 TALLOC_FREE(sampass);
 533                 return NT_STATUS_NO_SUCH_USER;
 534         }
 535
 536         if (pdb_get_acct_ctrl(sampass) & ACB_DISABLED) {
 537                 TALLOC_FREE(sampass);
 538                 return NT_STATUS_ACCOUNT_DISABLED;
 539         }
 540
 541         /* Woah - what does this to to the credential chain ? JRA */
 542         cred_hash3( pwd, q_u->pwd, p->dc->sess_key, 0);
 543
 544         DEBUG(100,("Server password set : new given value was :\n"));
 545         for(i = 0; i < sizeof(pwd); i++)
 546                 DEBUG(100,("%02X ", pwd[i]));
 547         DEBUG(100,("\n"));
 548
 549         old_pw = pdb_get_nt_passwd(sampass);
 550
 551         if (old_pw && memcmp(pwd, old_pw, 16) == 0) {
 552                 /* Avoid backend modificiations and other fun if the
 553                    client changed the password to the *same thing* */
 554
 555                 ret = True;
 556         } else {
 557
 558                 /* LM password should be NULL for machines */
 559                 if (!pdb_set_lanman_passwd(sampass, NULL, PDB_CHANGED)) {
 560                         TALLOC_FREE(sampass);
 561                         return NT_STATUS_NO_MEMORY;
 562                 }
 563
 564                 if (!pdb_set_nt_passwd(sampass, pwd, PDB_CHANGED)) {
 565                         TALLOC_FREE(sampass);
 566                         return NT_STATUS_NO_MEMORY;
 567                 }
 568
 569                 if (!pdb_set_pass_changed_now(sampass)) {
 570                         TALLOC_FREE(sampass);
 571                         /* Not quite sure what this one qualifies as, but this will do */
 572                         return NT_STATUS_UNSUCCESSFUL;
 573                 }
 574
 575                 become_root();
 576                 r_u->status = pdb_update_sam_account (sampass);
 577                 unbecome_root();
 578         }
 579
 580         /* set up the LSA Server Password Set response */
 581         init_net_r_srv_pwset(r_u, &cred_out, status);
 582
 583         TALLOC_FREE(sampass);
 584         return r_u->status;
 585 }
 586
 587 /*************************************************************************
 588  _net_sam_logoff:
 589  *************************************************************************/
 590
 591 NTSTATUS _net_sam_logoff(pipes_struct *p, NET_Q_SAM_LOGOFF *q_u, NET_R_SAM_LOGOFF *r_u)
 592 {
 593         fstring remote_machine;
 594
 595         if ( (lp_server_schannel() == True) && (p->auth.auth_type != PIPE_AUTH_TYPE_SCHANNEL) ) {
 596                 /* 'server schannel = yes' should enforce use of
 597                    schannel, the client did offer it in auth2, but
 598                    obviously did not use it. */
 599                 DEBUG(0,("_net_sam_logoff: client %s not using schannel for netlogon\n",
 600                         get_remote_machine_name() ));
 601                 return NT_STATUS_ACCESS_DENIED;
 602         }
 603
 604
 605         if (!get_valid_user_struct(p->vuid))
 606                 return NT_STATUS_NO_SUCH_USER;
 607
 608         /* Get the remote machine name for the creds store. */
 609         rpcstr_pull(remote_machine,q_u->sam_id.client.login.uni_comp_name.buffer,
 610                     sizeof(remote_machine),q_u->sam_id.client.login.uni_comp_name.uni_str_len*2,0);
 611
 612         if (!p->dc) {
 613                 /* Restore the saved state of the netlogon creds. */
 614                 BOOL ret;
 615
 616                 become_root();
 617                 ret = secrets_restore_schannel_session_info(p->pipe_state_mem_ctx,
 618                                                 remote_machine,
 619                                                 &p->dc);
 620                 unbecome_root();
 621                 if (!ret) {
 622                         return NT_STATUS_INVALID_HANDLE;
 623                 }
 624         }
 625
 626         if (!p->dc || !p->dc->authenticated) {
 627                 return NT_STATUS_INVALID_HANDLE;
 628         }
 629
 630         r_u->buffer_creds = 1; /* yes, we have valid server credentials */
 631
 632         /* checks and updates credentials.  creates reply credentials */
 633         if (!creds_server_step(p->dc, &q_u->sam_id.client.cred, &r_u->srv_creds)) {
 634                 DEBUG(2,("_net_sam_logoff: creds_server_step failed. Rejecting auth "
 635                         "request from client %s machine account %s\n",
 636                         remote_machine, p->dc->mach_acct ));
 637                 return NT_STATUS_INVALID_PARAMETER;
 638         }
 639
 640         /* We must store the creds state after an update. */
 641         become_root();
 642         secrets_store_schannel_session_info(p->pipe_state_mem_ctx,
 643                                         remote_machine,
 644                                         p->dc);
 645         unbecome_root();
 646
 647         r_u->status = NT_STATUS_OK;
 648         return r_u->status;
 649 }
 650
 651 /*******************************************************************
 652  gets a domain user's groups from their already-calculated NT_USER_TOKEN
 653  ********************************************************************/
 654
 655 static NTSTATUS nt_token_to_group_list(TALLOC_CTX *mem_ctx,
 656                                        const DOM_SID *domain_sid,
 657                                        size_t num_sids,
 658                                        const DOM_SID *sids,
 659                                        int *numgroups, DOM_GID **pgids)
 660 {
 661         int i;
 662
 663         *numgroups=0;
 664         *pgids = NULL;
 665
 666         for (i=0; i<num_sids; i++) {
 667                 DOM_GID gid;
 668                 if (!sid_peek_check_rid(domain_sid, &sids[i], &gid.g_rid)) {
 669                         continue;
 670                 }
 671                 gid.attr = (SE_GROUP_MANDATORY|SE_GROUP_ENABLED_BY_DEFAULT|
 672                             SE_GROUP_ENABLED);
 673                 ADD_TO_ARRAY(mem_ctx, DOM_GID, gid, pgids, numgroups);
 674                 if (*pgids == NULL) {
 675                         return NT_STATUS_NO_MEMORY;
 676                 }
 677         }
 678         return NT_STATUS_OK;
 679 }
 680
 681 /*************************************************************************
 682  _net_sam_logon
 683  *************************************************************************/
 684
 685 static NTSTATUS _net_sam_logon_internal(pipes_struct *p,
 686                                         NET_Q_SAM_LOGON *q_u,
 687                                         NET_R_SAM_LOGON *r_u,
 688                                         BOOL process_creds)
 689 {
 690         NTSTATUS status = NT_STATUS_OK;
 691         NET_USER_INFO_3 *usr_info = NULL;
 692         NET_ID_INFO_CTR *ctr = q_u->sam_id.ctr;
 693         UNISTR2 *uni_samlogon_user = NULL;
 694         UNISTR2 *uni_samlogon_domain = NULL;
 695         UNISTR2 *uni_samlogon_workstation = NULL;
 696         fstring nt_username, nt_domain, nt_workstation;
 697         auth_usersupplied_info *user_info = NULL;
 698         auth_serversupplied_info *server_info = NULL;
 699         struct samu *sampw;
 700         struct auth_context *auth_context = NULL;
 701
 702         if ( (lp_server_schannel() == True) && (p->auth.auth_type != PIPE_AUTH_TYPE_SCHANNEL) ) {
 703                 /* 'server schannel = yes' should enforce use of
 704                    schannel, the client did offer it in auth2, but
 705                    obviously did not use it. */
 706                 DEBUG(0,("_net_sam_logon_internal: client %s not using schannel for netlogon\n",
 707                         get_remote_machine_name() ));
 708                 return NT_STATUS_ACCESS_DENIED;
 709         }
 710
 711         usr_info = TALLOC_P(p->mem_ctx, NET_USER_INFO_3);
 712         if (!usr_info) {
 713                 return NT_STATUS_NO_MEMORY;
 714         }
 715
 716         ZERO_STRUCTP(usr_info);
 717
 718         /* store the user information, if there is any. */
 719         r_u->user = usr_info;
 720         r_u->auth_resp = 1; /* authoritative response */
 721         if (q_u->validation_level != 2 && q_u->validation_level != 3) {
 722                 DEBUG(0,("_net_sam_logon: bad validation_level value %d.\n", (int)q_u->validation_level ));
 723                 return NT_STATUS_ACCESS_DENIED;
 724         }
 725         /* We handle the return of USER_INFO_2 instead of 3 in the parse return. Sucks, I know... */
 726         r_u->switch_value = q_u->validation_level; /* indicates type of validation user info */
 727         r_u->buffer_creds = 1; /* Ensure we always return server creds. */
 728
 729         if (!get_valid_user_struct(p->vuid))
 730                 return NT_STATUS_NO_SUCH_USER;
 731
 732         if (process_creds) {
 733                 fstring remote_machine;
 734
 735                 /* Get the remote machine name for the creds store. */
 736                 /* Note this is the remote machine this request is coming from (member server),
 737                    not neccessarily the workstation name the user is logging onto.
 738                 */
 739                 rpcstr_pull(remote_machine,q_u->sam_id.client.login.uni_comp_name.buffer,
 740                     sizeof(remote_machine),q_u->sam_id.client.login.uni_comp_name.uni_str_len*2,0);
 741
 742                 if (!p->dc) {
 743                         /* Restore the saved state of the netlogon creds. */
 744                         BOOL ret;
 745
 746                         become_root();
 747                         ret = secrets_restore_schannel_session_info(p->pipe_state_mem_ctx,
 748                                         remote_machine,
 749                                         &p->dc);
 750                         unbecome_root();
 751                         if (!ret) {
 752                                 return NT_STATUS_INVALID_HANDLE;
 753                         }
 754                 }
 755
 756                 if (!p->dc || !p->dc->authenticated) {
 757                         return NT_STATUS_INVALID_HANDLE;
 758                 }
 759
 760                 /* checks and updates credentials.  creates reply credentials */
 761                 if (!creds_server_step(p->dc, &q_u->sam_id.client.cred,  &r_u->srv_creds)) {
 762                         DEBUG(2,("_net_sam_logon: creds_server_step failed. Rejecting auth "
 763                                 "request from client %s machine account %s\n",
 764                                 remote_machine, p->dc->mach_acct ));
 765                         return NT_STATUS_INVALID_PARAMETER;
 766                 }
 767
 768                 /* We must store the creds state after an update. */
 769                 become_root();
 770                 secrets_store_schannel_session_info(p->pipe_state_mem_ctx,
 771                                         remote_machine,
 772                                         p->dc);
 773                 unbecome_root();
 774         }
 775
 776         switch (q_u->sam_id.logon_level) {
 777         case INTERACTIVE_LOGON_TYPE:
 778                 uni_samlogon_user = &ctr->auth.id1.uni_user_name;
 779                 uni_samlogon_domain = &ctr->auth.id1.uni_domain_name;
 780
 781                 uni_samlogon_workstation = &ctr->auth.id1.uni_wksta_name;
 782
 783                 DEBUG(3,("SAM Logon (Interactive). Domain:[%s].  ", lp_workgroup()));
 784                 break;
 785         case NET_LOGON_TYPE:
 786                 uni_samlogon_user = &ctr->auth.id2.uni_user_name;
 787                 uni_samlogon_domain = &ctr->auth.id2.uni_domain_name;
 788                 uni_samlogon_workstation = &ctr->auth.id2.uni_wksta_name;
 789
 790                 DEBUG(3,("SAM Logon (Network). Domain:[%s].  ", lp_workgroup()));
 791                 break;
 792         default:
 793                 DEBUG(2,("SAM Logon: unsupported switch value\n"));
 794                 return NT_STATUS_INVALID_INFO_CLASS;
 795         } /* end switch */
 796
 797         rpcstr_pull(nt_username,uni_samlogon_user->buffer,sizeof(nt_username),uni_samlogon_user->uni_str_len*2,0);
 798         rpcstr_pull(nt_domain,uni_samlogon_domain->buffer,sizeof(nt_domain),uni_samlogon_domain->uni_str_len*2,0);
 799         rpcstr_pull(nt_workstation,uni_samlogon_workstation->buffer,sizeof(nt_workstation),uni_samlogon_workstation->uni_str_len*2,0);
 800
 801         DEBUG(3,("User:[%s@%s] Requested Domain:[%s]\n", nt_username, nt_workstation, nt_domain));
 802         fstrcpy(current_user_info.smb_name, nt_username);
 803         sub_set_smb_name(nt_username);
 804
 805         DEBUG(5,("Attempting validation level %d for unmapped username %s.\n", q_u->sam_id.ctr->switch_value, nt_username));
 806
 807         status = NT_STATUS_OK;
 808
 809         switch (ctr->switch_value) {
 810         case NET_LOGON_TYPE:
 811         {
 812                 const char *wksname = nt_workstation;
 813
 814                 if (!NT_STATUS_IS_OK(status = make_auth_context_fixed(&auth_context, ctr->auth.id2.lm_chal))) {
 815                         return status;
 816                 }
 817
 818                 /* For a network logon, the workstation name comes in with two
 819                  * backslashes in the front. Strip them if they are there. */
 820
 821                 if (*wksname == '\\') wksname++;
 822                 if (*wksname == '\\') wksname++;
 823
 824                 /* Standard challenge/response authenticaion */
 825                 if (!make_user_info_netlogon_network(&user_info,
 826                                                      nt_username, nt_domain,
 827                                                      wksname,
 828                                                      ctr->auth.id2.param_ctrl,
 829                                                      ctr->auth.id2.lm_chal_resp.buffer,
 830                                                      ctr->auth.id2.lm_chal_resp.str_str_len,
 831                                                      ctr->auth.id2.nt_chal_resp.buffer,
 832                                                      ctr->auth.id2.nt_chal_resp.str_str_len)) {
 833                         status = NT_STATUS_NO_MEMORY;
 834                 }
 835                 break;
 836         }
 837         case INTERACTIVE_LOGON_TYPE:
 838                 /* 'Interactive' authentication, supplies the password in its
 839                    MD4 form, encrypted with the session key.  We will convert
 840                    this to challenge/response for the auth subsystem to chew
 841                    on */
 842         {
 843                 const uint8 *chal;
 844
 845                 if (!NT_STATUS_IS_OK(status = make_auth_context_subsystem(&auth_context))) {
 846                         return status;
 847                 }
 848
 849                 chal = auth_context->get_ntlm_challenge(auth_context);
 850
 851                 if (!make_user_info_netlogon_interactive(&user_info,
 852                                                          nt_username, nt_domain,
 853                                                          nt_workstation,
 854                                                          ctr->auth.id1.param_ctrl,
 855                                                          chal,
 856                                                          ctr->auth.id1.lm_owf.data,
 857                                                          ctr->auth.id1.nt_owf.data,
 858                                                          p->dc->sess_key)) {
 859                         status = NT_STATUS_NO_MEMORY;
 860                 }
 861                 break;
 862         }
 863         default:
 864                 DEBUG(2,("SAM Logon: unsupported switch value\n"));
 865                 return NT_STATUS_INVALID_INFO_CLASS;
 866         } /* end switch */
 867
 868         if ( NT_STATUS_IS_OK(status) ) {
 869                 status = auth_context->check_ntlm_password(auth_context,
 870                         user_info, &server_info);
 871         }
 872
 873         (auth_context->free)(&auth_context);
 874         free_user_info(&user_info);
 875
 876         DEBUG(5, ("_net_sam_logon: check_password returned status %s\n",
 877                   nt_errstr(status)));
 878
 879         /* Check account and password */
 880
 881         if (!NT_STATUS_IS_OK(status)) {
 882                 /* If we don't know what this domain is, we need to
 883                    indicate that we are not authoritative.  This
 884                    allows the client to decide if it needs to try
 885                    a local user.  Fix by jpjanosi@us.ibm.com, #2976 */
 886                 if ( NT_STATUS_EQUAL(status, NT_STATUS_NO_SUCH_USER)
 887                      && !strequal(nt_domain, get_global_sam_name())
 888                      && !is_trusted_domain(nt_domain) )
 889                         r_u->auth_resp = 0; /* We are not authoritative */
 890
 891                 TALLOC_FREE(server_info);
 892                 return status;
 893         }
 894
 895         if (server_info->guest) {
 896                 /* We don't like guest domain logons... */
 897                 DEBUG(5,("_net_sam_logon: Attempted domain logon as GUEST "
 898                          "denied.\n"));
 899                 TALLOC_FREE(server_info);
 900                 return NT_STATUS_LOGON_FAILURE;
 901         }
 902
 903         /* This is the point at which, if the login was successful, that
 904            the SAM Local Security Authority should record that the user is
 905            logged in to the domain.  */
 906
 907         {
 908                 DOM_GID *gids = NULL;
 909                 const DOM_SID *user_sid = NULL;
 910                 const DOM_SID *group_sid = NULL;
 911                 DOM_SID domain_sid;
 912                 uint32 user_rid, group_rid;
 913
 914                 int num_gids = 0;
 915                 pstring my_name;
 916                 fstring user_sid_string;
 917                 fstring group_sid_string;
 918                 unsigned char user_session_key[16];
 919                 unsigned char lm_session_key[16];
 920                 unsigned char pipe_session_key[16];
 921
 922                 sampw = server_info->sam_account;
 923
 924                 /* set up pointer indicating user/password failed to be
 925                  * found */
 926                 usr_info->ptr_user_info = 0;
 927
 928                 user_sid = pdb_get_user_sid(sampw);
 929                 group_sid = pdb_get_group_sid(sampw);
 930
 931                 sid_copy(&domain_sid, user_sid);
 932                 sid_split_rid(&domain_sid, &user_rid);
 933
 934                 if (!sid_peek_check_rid(&domain_sid, group_sid, &group_rid)) {
 935                         DEBUG(1, ("_net_sam_logon: user %s\\%s has user sid "
 936                                   "%s\n but group sid %s.\n"
 937                                   "The conflicting domain portions are not "
 938                                   "supported for NETLOGON calls\n",
 939                                   pdb_get_domain(sampw),
 940                                   pdb_get_username(sampw),
 941                                   sid_to_string(user_sid_string, user_sid),
 942                                   sid_to_string(group_sid_string, group_sid)));
 943                         return NT_STATUS_UNSUCCESSFUL;
 944                 }
 945
 946
 947                 if(server_info->login_server) {
 948                         pstrcpy(my_name, server_info->login_server);
 949                 } else {
 950                         pstrcpy(my_name, global_myname());
 951                 }
 952
 953                 status = nt_token_to_group_list(p->mem_ctx, &domain_sid,
 954                                                 server_info->num_sids,
 955                                                 server_info->sids,
 956                                                 &num_gids, &gids);
 957
 958                 if (!NT_STATUS_IS_OK(status)) {
 959                         return status;
 960                 }
 961
 962                 if (server_info->user_session_key.length) {
 963                         memcpy(user_session_key,
 964                                server_info->user_session_key.data,
 965                                MIN(sizeof(user_session_key),
 966                                    server_info->user_session_key.length));
 967                         if (process_creds) {
 968                                 /* Get the pipe session key from the creds. */
 969                                 memcpy(pipe_session_key, p->dc->sess_key, 16);
 970                         } else {
 971                                 /* Get the pipe session key from the schannel. */
 972                                 if (p->auth.auth_type != PIPE_AUTH_TYPE_SCHANNEL || p->auth.a_u.schannel_auth == NULL) {
 973                                         return NT_STATUS_INVALID_HANDLE;
 974                                 }
 975                                 memcpy(pipe_session_key, p->auth.a_u.schannel_auth->sess_key, 16);
 976                         }
 977                         SamOEMhash(user_session_key, pipe_session_key, 16);
 978                         memset(pipe_session_key, '\0', 16);
 979                 }
 980                 if (server_info->lm_session_key.length) {
 981                         memcpy(lm_session_key,
 982                                server_info->lm_session_key.data,
 983                                MIN(sizeof(lm_session_key),
 984                                    server_info->lm_session_key.length));
 985                         if (process_creds) {
 986                                 /* Get the pipe session key from the creds. */
 987                                 memcpy(pipe_session_key, p->dc->sess_key, 16);
 988                         } else {
 989                                 /* Get the pipe session key from the schannel. */
 990                                 if (p->auth.auth_type != PIPE_AUTH_TYPE_SCHANNEL || p->auth.a_u.schannel_auth == NULL) {
 991                                         return NT_STATUS_INVALID_HANDLE;
 992                                 }
 993                                 memcpy(pipe_session_key, p->auth.a_u.schannel_auth->sess_key, 16);
 994                         }
 995                         SamOEMhash(lm_session_key, pipe_session_key, 16);
 996                         memset(pipe_session_key, '\0', 16);
 997                 }
 998
 999                 init_net_user_info3(p->mem_ctx, usr_info,
1000                                     user_rid,
1001                                     group_rid,
1002                                     pdb_get_username(sampw),
1003                                     pdb_get_fullname(sampw),
1004                                     pdb_get_homedir(sampw),
1005                                     pdb_get_dir_drive(sampw),
1006                                     pdb_get_logon_script(sampw),
1007                                     pdb_get_profile_path(sampw),
1008                                     pdb_get_logon_time(sampw),
1009                                     get_time_t_max(),
1010                                     get_time_t_max(),
1011                                     pdb_get_pass_last_set_time(sampw),
1012                                     pdb_get_pass_can_change_time(sampw),
1013                                     pdb_get_pass_must_change_time(sampw),
1014
1015                                     0, /* logon_count */
1016                                     0, /* bad_pw_count */
1017                                     num_gids,    /* uint32 num_groups */
1018                                     gids    , /* DOM_GID *gids */
1019                                     0x20    , /* uint32 user_flgs (?) */
1020                                     server_info->user_session_key.length ? user_session_key : NULL,
1021                                     server_info->lm_session_key.length ? lm_session_key : NULL,
1022                                     my_name     , /* char *logon_srv */
1023                                     pdb_get_domain(sampw),
1024                                     &domain_sid);     /* DOM_SID *dom_sid */
1025                 ZERO_STRUCT(user_session_key);
1026                 ZERO_STRUCT(lm_session_key);
1027         }
1028         TALLOC_FREE(server_info);
1029         return status;
1030 }
1031
1032 /*************************************************************************
1033  _net_sam_logon
1034  *************************************************************************/
1035
1036 NTSTATUS _net_sam_logon(pipes_struct *p, NET_Q_SAM_LOGON *q_u, NET_R_SAM_LOGON *r_u)
1037 {
1038         return _net_sam_logon_internal(p, q_u, r_u, True);
1039 }
1040
1041 /*************************************************************************
1042  _net_sam_logon_ex - no credential chaining. Map into net sam logon.
1043  *************************************************************************/
1044
1045 NTSTATUS _net_sam_logon_ex(pipes_struct *p, NET_Q_SAM_LOGON_EX *q_u, NET_R_SAM_LOGON_EX *r_u)
1046 {
1047         NET_Q_SAM_LOGON q;
1048         NET_R_SAM_LOGON r;
1049
1050         ZERO_STRUCT(q);
1051         ZERO_STRUCT(r);
1052
1053         /* Only allow this if the pipe is protected. */
1054         if (p->auth.auth_type != PIPE_AUTH_TYPE_SCHANNEL) {
1055                 DEBUG(0,("_net_sam_logon_ex: client %s not using schannel for netlogon\n",
1056                         get_remote_machine_name() ));
1057                 return NT_STATUS_INVALID_PARAMETER;
1058         }
1059
1060         /* Map a NET_Q_SAM_LOGON_EX to NET_Q_SAM_LOGON. */
1061         q.validation_level = q_u->validation_level;
1062
1063         /* Map a DOM_SAM_INFO_EX into a DOM_SAM_INFO with no creds. */
1064         q.sam_id.client.login = q_u->sam_id.client;
1065         q.sam_id.logon_level = q_u->sam_id.logon_level;
1066         q.sam_id.ctr = q_u->sam_id.ctr;
1067
1068         r_u->status = _net_sam_logon_internal(p, &q, &r, False);
1069
1070         if (!NT_STATUS_IS_OK(r_u->status)) {
1071                 return r_u->status;
1072         }
1073
1074         /* Map the NET_R_SAM_LOGON to NET_R_SAM_LOGON_EX. */
1075         r_u->switch_value = r.switch_value;
1076         r_u->user = r.user;
1077         r_u->auth_resp = r.auth_resp;
1078         r_u->flags = 0; /* FIXME ! */
1079         return r_u->status;
1080 }
1081
1082 /*************************************************************************
1083  _ds_enum_dom_trusts
1084  *************************************************************************/
1085 #if 0   /* JERRY -- not correct */
1086 NTSTATUS _ds_enum_dom_trusts(pipes_struct *p, DS_Q_ENUM_DOM_TRUSTS *q_u,
1087                              DS_R_ENUM_DOM_TRUSTS *r_u)
1088 {
1089         NTSTATUS status = NT_STATUS_OK;
1090
1091         /* TODO: According to MSDN, the can only be executed against a
1092            DC or domain member running Windows 2000 or later.  Need
1093            to test against a standalone 2k server and see what it
1094            does.  A windows 2000 DC includes its own domain in the
1095            list.  --jerry */
1096
1097         return status;
1098 }
1099 #endif  /* JERRY */