source3/libsmb/cliconnect.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    client connect/disconnect routines
   4    Copyright (C) Andrew Tridgell 1994-1998
   5    Copyright (C) Andrew Bartlett 2001-2003
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23
  24 extern pstring user_socket_options;
  25
  26 static const struct {
  27         int prot;
  28         const char *name;
  29 } prots[] = {
  30         {PROTOCOL_CORE,"PC NETWORK PROGRAM 1.0"},
  31         {PROTOCOL_COREPLUS,"MICROSOFT NETWORKS 1.03"},
  32         {PROTOCOL_LANMAN1,"MICROSOFT NETWORKS 3.0"},
  33         {PROTOCOL_LANMAN1,"LANMAN1.0"},
  34         {PROTOCOL_LANMAN2,"LM1.2X002"},
  35         {PROTOCOL_LANMAN2,"DOS LANMAN2.1"},
  36         {PROTOCOL_LANMAN2,"Samba"},
  37         {PROTOCOL_NT1,"NT LANMAN 1.0"},
  38         {PROTOCOL_NT1,"NT LM 0.12"},
  39         {-1,NULL}
  40 };
  41
  42 /**
  43  * Set the user session key for a connection
  44  * @param cli The cli structure to add it too
  45  * @param session_key The session key used.  (A copy of this is taken for the cli struct)
  46  *
  47  */
  48
  49 static void cli_set_session_key (struct cli_state *cli, const DATA_BLOB session_key)
  50 {
  51         cli->user_session_key = data_blob(session_key.data, session_key.length);
  52 }
  53
  54 /****************************************************************************
  55  Do an old lanman2 style session setup.
  56 ****************************************************************************/
  57
  58 static BOOL cli_session_setup_lanman2(struct cli_state *cli, const char *user,
  59                                       const char *pass, size_t passlen, const char *workgroup)
  60 {
  61         DATA_BLOB session_key = data_blob(NULL, 0);
  62         DATA_BLOB lm_response = data_blob(NULL, 0);
  63         fstring pword;
  64         char *p;
  65
  66         if (passlen > sizeof(pword)-1)
  67                 return False;
  68
  69         /* LANMAN servers predate NT status codes and Unicode and ignore those
  70            smb flags so we must disable the corresponding default capabilities
  71            that would otherwise cause the Unicode and NT Status flags to be
  72            set (and even returned by the server) */
  73
  74         cli->capabilities &= ~(CAP_UNICODE | CAP_STATUS32);
  75
  76         /* if in share level security then don't send a password now */
  77         if (!(cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL))
  78                 passlen = 0;
  79
  80         if (passlen > 0 && (cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) && passlen != 24) {
  81                 /* Encrypted mode needed, and non encrypted password supplied. */
  82                 lm_response = data_blob(NULL, 24);
  83                 if (!SMBencrypt(pass, cli->secblob.data,(uchar *)lm_response.data)) {
  84                         DEBUG(1, ("Password is > 14 chars in length, and is therefore incompatible with Lanman authentication\n"));
  85                         return False;
  86                 }
  87         } else if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) && passlen == 24) {
  88                 /* Encrypted mode needed, and encrypted password supplied. */
  89                 lm_response = data_blob(pass, passlen);
  90         } else if (passlen > 0) {
  91                 /* Plaintext mode needed, assume plaintext supplied. */
  92                 passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
  93                 lm_response = data_blob(pass, passlen);
  94         }
  95
  96         /* send a session setup command */
  97         memset(cli->outbuf,'\0',smb_size);
  98         set_message(cli->outbuf,10, 0, True);
  99         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 100         cli_setup_packet(cli);
 101
 102         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 103         SSVAL(cli->outbuf,smb_vwv2,cli->max_xmit);
 104         SSVAL(cli->outbuf,smb_vwv3,2);
 105         SSVAL(cli->outbuf,smb_vwv4,1);
 106         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 107         SSVAL(cli->outbuf,smb_vwv7,lm_response.length);
 108
 109         p = smb_buf(cli->outbuf);
 110         memcpy(p,lm_response.data,lm_response.length);
 111         p += lm_response.length;
 112         p += clistr_push(cli, p, user, -1, STR_TERMINATE|STR_UPPER);
 113         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE|STR_UPPER);
 114         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 115         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 116         cli_setup_bcc(cli, p);
 117
 118         cli_send_smb(cli);
 119         if (!cli_receive_smb(cli))
 120                 return False;
 121
 122         show_msg(cli->inbuf);
 123
 124         if (cli_is_error(cli))
 125                 return False;
 126
 127         /* use the returned vuid from now on */
 128         cli->vuid = SVAL(cli->inbuf,smb_uid);
 129         fstrcpy(cli->user_name, user);
 130
 131         if (session_key.data) {
 132                 /* Have plaintext orginal */
 133                 cli_set_session_key(cli, session_key);
 134         }
 135
 136         return True;
 137 }
 138
 139 /****************************************************************************
 140  Work out suitable capabilities to offer the server.
 141 ****************************************************************************/
 142
 143 static uint32 cli_session_setup_capabilities(struct cli_state *cli)
 144 {
 145         uint32 capabilities = CAP_NT_SMBS;
 146
 147         if (!cli->force_dos_errors)
 148                 capabilities |= CAP_STATUS32;
 149
 150         if (cli->use_level_II_oplocks)
 151                 capabilities |= CAP_LEVEL_II_OPLOCKS;
 152
 153         capabilities |= (cli->capabilities & (CAP_UNICODE|CAP_LARGE_FILES|CAP_LARGE_READX|CAP_LARGE_WRITEX|CAP_DFS));
 154         return capabilities;
 155 }
 156
 157 /****************************************************************************
 158  Do a NT1 guest session setup.
 159 ****************************************************************************/
 160
 161 static BOOL cli_session_setup_guest(struct cli_state *cli)
 162 {
 163         char *p;
 164         uint32 capabilities = cli_session_setup_capabilities(cli);
 165
 166         memset(cli->outbuf, '\0', smb_size);
 167         set_message(cli->outbuf,13,0,True);
 168         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 169         cli_setup_packet(cli);
 170
 171         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 172         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 173         SSVAL(cli->outbuf,smb_vwv3,2);
 174         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 175         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 176         SSVAL(cli->outbuf,smb_vwv7,0);
 177         SSVAL(cli->outbuf,smb_vwv8,0);
 178         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 179         p = smb_buf(cli->outbuf);
 180         p += clistr_push(cli, p, "", -1, STR_TERMINATE); /* username */
 181         p += clistr_push(cli, p, "", -1, STR_TERMINATE); /* workgroup */
 182         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 183         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 184         cli_setup_bcc(cli, p);
 185
 186         cli_send_smb(cli);
 187         if (!cli_receive_smb(cli))
 188               return False;
 189
 190         show_msg(cli->inbuf);
 191
 192         if (cli_is_error(cli))
 193                 return False;
 194
 195         cli->vuid = SVAL(cli->inbuf,smb_uid);
 196
 197         p = smb_buf(cli->inbuf);
 198         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 199         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 200         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 201
 202         fstrcpy(cli->user_name, "");
 203
 204         return True;
 205 }
 206
 207 /****************************************************************************
 208  Do a NT1 plaintext session setup.
 209 ****************************************************************************/
 210
 211 static BOOL cli_session_setup_plaintext(struct cli_state *cli, const char *user,
 212                                         const char *pass, const char *workgroup)
 213 {
 214         uint32 capabilities = cli_session_setup_capabilities(cli);
 215         char *p;
 216         fstring lanman;
 217
 218         fstr_sprintf( lanman, "Samba %s", SAMBA_VERSION_STRING);
 219
 220         set_message(cli->outbuf,13,0,True);
 221         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 222         cli_setup_packet(cli);
 223
 224         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 225         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 226         SSVAL(cli->outbuf,smb_vwv3,2);
 227         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 228         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 229         SSVAL(cli->outbuf,smb_vwv8,0);
 230         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 231         p = smb_buf(cli->outbuf);
 232
 233         /* check wether to send the ASCII or UNICODE version of the password */
 234
 235         if ( (capabilities & CAP_UNICODE) == 0 ) {
 236                 p += clistr_push(cli, p, pass, -1, STR_TERMINATE); /* password */
 237                 SSVAL(cli->outbuf,smb_vwv7,PTR_DIFF(p, smb_buf(cli->outbuf)));
 238         }
 239         else {
 240                 p += clistr_push(cli, p, pass, -1, STR_UNICODE|STR_TERMINATE); /* unicode password */
 241                 SSVAL(cli->outbuf,smb_vwv8,PTR_DIFF(p, smb_buf(cli->outbuf)));
 242         }
 243
 244         p += clistr_push(cli, p, user, -1, STR_TERMINATE); /* username */
 245         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE); /* workgroup */
 246         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 247         p += clistr_push(cli, p, lanman, -1, STR_TERMINATE);
 248         cli_setup_bcc(cli, p);
 249
 250         cli_send_smb(cli);
 251         if (!cli_receive_smb(cli))
 252               return False;
 253
 254         show_msg(cli->inbuf);
 255
 256         if (cli_is_error(cli))
 257                 return False;
 258
 259         cli->vuid = SVAL(cli->inbuf,smb_uid);
 260         p = smb_buf(cli->inbuf);
 261         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 262         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 263         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 264         fstrcpy(cli->user_name, user);
 265
 266         return True;
 267 }
 268
 269 /****************************************************************************
 270    do a NT1 NTLM/LM encrypted session setup - for when extended security
 271    is not negotiated.
 272    @param cli client state to create do session setup on
 273    @param user username
 274    @param pass *either* cleartext password (passlen !=24) or LM response.
 275    @param ntpass NT response, implies ntpasslen >=24, implies pass is not clear
 276    @param workgroup The user's domain.
 277 ****************************************************************************/
 278
 279 static BOOL cli_session_setup_nt1(struct cli_state *cli, const char *user,
 280                                   const char *pass, size_t passlen,
 281                                   const char *ntpass, size_t ntpasslen,
 282                                   const char *workgroup)
 283 {
 284         uint32 capabilities = cli_session_setup_capabilities(cli);
 285         DATA_BLOB lm_response = data_blob(NULL, 0);
 286         DATA_BLOB nt_response = data_blob(NULL, 0);
 287         DATA_BLOB session_key = data_blob(NULL, 0);
 288         BOOL ret = False;
 289         char *p;
 290
 291         if (passlen == 0) {
 292                 /* do nothing - guest login */
 293         } else if (passlen != 24) {
 294                 if (lp_client_ntlmv2_auth()) {
 295                         DATA_BLOB server_chal;
 296                         DATA_BLOB names_blob;
 297                         server_chal = data_blob(cli->secblob.data, MIN(cli->secblob.length, 8));
 298
 299                         /* note that the 'workgroup' here is a best guess - we don't know
 300                            the server's domain at this point.  The 'server name' is also
 301                            dodgy...
 302                         */
 303                         names_blob = NTLMv2_generate_names_blob(cli->called.name, workgroup);
 304
 305                         if (!SMBNTLMv2encrypt(user, workgroup, pass, &server_chal,
 306                                               &names_blob,
 307                                               &lm_response, &nt_response, &session_key)) {
 308                                 data_blob_free(&names_blob);
 309                                 data_blob_free(&server_chal);
 310                                 return False;
 311                         }
 312                         data_blob_free(&names_blob);
 313                         data_blob_free(&server_chal);
 314
 315                 } else {
 316                         uchar nt_hash[16];
 317                         E_md4hash(pass, nt_hash);
 318
 319 #ifdef LANMAN_ONLY
 320                         nt_response = data_blob(NULL, 0);
 321 #else
 322                         nt_response = data_blob(NULL, 24);
 323                         SMBNTencrypt(pass,cli->secblob.data,nt_response.data);
 324 #endif
 325                         /* non encrypted password supplied. Ignore ntpass. */
 326                         if (lp_client_lanman_auth()) {
 327                                 lm_response = data_blob(NULL, 24);
 328                                 if (!SMBencrypt(pass,cli->secblob.data, lm_response.data)) {
 329                                         /* Oops, the LM response is invalid, just put
 330                                            the NT response there instead */
 331                                         data_blob_free(&lm_response);
 332                                         lm_response = data_blob(nt_response.data, nt_response.length);
 333                                 }
 334                         } else {
 335                                 /* LM disabled, place NT# in LM field instead */
 336                                 lm_response = data_blob(nt_response.data, nt_response.length);
 337                         }
 338
 339                         session_key = data_blob(NULL, 16);
 340 #ifdef LANMAN_ONLY
 341                         E_deshash(pass, session_key.data);
 342                         memset(&session_key.data[8], '\0', 8);
 343 #else
 344                         SMBsesskeygen_ntv1(nt_hash, NULL, session_key.data);
 345 #endif
 346                 }
 347 #ifdef LANMAN_ONLY
 348                 cli_simple_set_signing(cli, session_key, lm_response);
 349 #else
 350                 cli_simple_set_signing(cli, session_key, nt_response);
 351 #endif
 352         } else {
 353                 /* pre-encrypted password supplied.  Only used for
 354                    security=server, can't do
 355                    signing because we don't have original key */
 356
 357                 lm_response = data_blob(pass, passlen);
 358                 nt_response = data_blob(ntpass, ntpasslen);
 359         }
 360
 361         /* send a session setup command */
 362         memset(cli->outbuf,'\0',smb_size);
 363
 364         set_message(cli->outbuf,13,0,True);
 365         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 366         cli_setup_packet(cli);
 367
 368         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 369         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 370         SSVAL(cli->outbuf,smb_vwv3,2);
 371         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 372         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 373         SSVAL(cli->outbuf,smb_vwv7,lm_response.length);
 374         SSVAL(cli->outbuf,smb_vwv8,nt_response.length);
 375         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 376         p = smb_buf(cli->outbuf);
 377         if (lm_response.length) {
 378                 memcpy(p,lm_response.data, lm_response.length); p += lm_response.length;
 379         }
 380         if (nt_response.length) {
 381                 memcpy(p,nt_response.data, nt_response.length); p += nt_response.length;
 382         }
 383         p += clistr_push(cli, p, user, -1, STR_TERMINATE);
 384
 385         /* Upper case here might help some NTLMv2 implementations */
 386         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE|STR_UPPER);
 387         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 388         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 389         cli_setup_bcc(cli, p);
 390
 391         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 392                 ret = False;
 393                 goto end;
 394         }
 395
 396         /* show_msg(cli->inbuf); */
 397
 398         if (cli_is_error(cli)) {
 399                 ret = False;
 400                 goto end;
 401         }
 402
 403         /* use the returned vuid from now on */
 404         cli->vuid = SVAL(cli->inbuf,smb_uid);
 405
 406         p = smb_buf(cli->inbuf);
 407         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 408         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 409         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 410
 411         fstrcpy(cli->user_name, user);
 412
 413         if (session_key.data) {
 414                 /* Have plaintext orginal */
 415                 cli_set_session_key(cli, session_key);
 416         }
 417
 418         ret = True;
 419 end:
 420         data_blob_free(&lm_response);
 421         data_blob_free(&nt_response);
 422         data_blob_free(&session_key);
 423         return ret;
 424 }
 425
 426 /****************************************************************************
 427  Send a extended security session setup blob
 428 ****************************************************************************/
 429
 430 static BOOL cli_session_setup_blob_send(struct cli_state *cli, DATA_BLOB blob)
 431 {
 432         uint32 capabilities = cli_session_setup_capabilities(cli);
 433         char *p;
 434
 435         capabilities |= CAP_EXTENDED_SECURITY;
 436
 437         /* send a session setup command */
 438         memset(cli->outbuf,'\0',smb_size);
 439
 440         set_message(cli->outbuf,12,0,True);
 441         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 442
 443         cli_setup_packet(cli);
 444
 445         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 446         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 447         SSVAL(cli->outbuf,smb_vwv3,2);
 448         SSVAL(cli->outbuf,smb_vwv4,1);
 449         SIVAL(cli->outbuf,smb_vwv5,0);
 450         SSVAL(cli->outbuf,smb_vwv7,blob.length);
 451         SIVAL(cli->outbuf,smb_vwv10,capabilities);
 452         p = smb_buf(cli->outbuf);
 453         memcpy(p, blob.data, blob.length);
 454         p += blob.length;
 455         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 456         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 457         cli_setup_bcc(cli, p);
 458         return cli_send_smb(cli);
 459 }
 460
 461 /****************************************************************************
 462  Send a extended security session setup blob, returning a reply blob.
 463 ****************************************************************************/
 464
 465 static DATA_BLOB cli_session_setup_blob_receive(struct cli_state *cli)
 466 {
 467         DATA_BLOB blob2 = data_blob(NULL, 0);
 468         char *p;
 469         size_t len;
 470
 471         if (!cli_receive_smb(cli))
 472                 return blob2;
 473
 474         show_msg(cli->inbuf);
 475
 476         if (cli_is_error(cli) && !NT_STATUS_EQUAL(cli_nt_error(cli),
 477                                                   NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 478                 return blob2;
 479         }
 480
 481         /* use the returned vuid from now on */
 482         cli->vuid = SVAL(cli->inbuf,smb_uid);
 483
 484         p = smb_buf(cli->inbuf);
 485
 486         blob2 = data_blob(p, SVAL(cli->inbuf, smb_vwv3));
 487
 488         p += blob2.length;
 489         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 490
 491         /* w2k with kerberos doesn't properly null terminate this field */
 492         len = smb_buflen(cli->inbuf) - PTR_DIFF(p, smb_buf(cli->inbuf));
 493         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), len, 0);
 494
 495         return blob2;
 496 }
 497
 498 #ifdef HAVE_KRB5
 499
 500 /****************************************************************************
 501  Send a extended security session setup blob, returning a reply blob.
 502 ****************************************************************************/
 503
 504 static DATA_BLOB cli_session_setup_blob(struct cli_state *cli, DATA_BLOB blob)
 505 {
 506         DATA_BLOB blob2 = data_blob(NULL, 0);
 507         if (!cli_session_setup_blob_send(cli, blob)) {
 508                 return blob2;
 509         }
 510
 511         return cli_session_setup_blob_receive(cli);
 512 }
 513
 514 /****************************************************************************
 515  Use in-memory credentials cache
 516 ****************************************************************************/
 517
 518 static void use_in_memory_ccache(void) {
 519         setenv(KRB5_ENV_CCNAME, "MEMORY:cliconnect", 1);
 520 }
 521
 522 /****************************************************************************
 523  Do a spnego/kerberos encrypted session setup.
 524 ****************************************************************************/
 525
 526 static ADS_STATUS cli_session_setup_kerberos(struct cli_state *cli, const char *principal, const char *workgroup)
 527 {
 528         DATA_BLOB blob2, negTokenTarg;
 529         DATA_BLOB session_key_krb5;
 530         DATA_BLOB null_blob = data_blob(NULL, 0);
 531         int rc;
 532
 533         DEBUG(2,("Doing kerberos session setup\n"));
 534
 535         /* generate the encapsulated kerberos5 ticket */
 536         rc = spnego_gen_negTokenTarg(principal, 0, &negTokenTarg, &session_key_krb5, 0);
 537
 538         if (rc) {
 539                 DEBUG(1, ("spnego_gen_negTokenTarg failed: %s\n", error_message(rc)));
 540                 return ADS_ERROR_KRB5(rc);
 541         }
 542
 543 #if 0
 544         file_save("negTokenTarg.dat", negTokenTarg.data, negTokenTarg.length);
 545 #endif
 546
 547         cli_simple_set_signing(cli, session_key_krb5, null_blob);
 548
 549         blob2 = cli_session_setup_blob(cli, negTokenTarg);
 550
 551         /* we don't need this blob for kerberos */
 552         data_blob_free(&blob2);
 553
 554         cli_set_session_key(cli, session_key_krb5);
 555
 556         data_blob_free(&negTokenTarg);
 557         data_blob_free(&session_key_krb5);
 558
 559         if (cli_is_error(cli)) {
 560                 if (NT_STATUS_IS_OK(cli_nt_error(cli))) {
 561                         return ADS_ERROR_NT(NT_STATUS_UNSUCCESSFUL);
 562                 }
 563         }
 564         return ADS_ERROR_NT(cli_nt_error(cli));
 565 }
 566 #endif  /* HAVE_KRB5 */
 567
 568
 569 /****************************************************************************
 570  Do a spnego/NTLMSSP encrypted session setup.
 571 ****************************************************************************/
 572
 573 static NTSTATUS cli_session_setup_ntlmssp(struct cli_state *cli, const char *user,
 574                                           const char *pass, const char *domain)
 575 {
 576         struct ntlmssp_state *ntlmssp_state;
 577         NTSTATUS nt_status;
 578         int turn = 1;
 579         DATA_BLOB msg1;
 580         DATA_BLOB blob = data_blob(NULL, 0);
 581         DATA_BLOB blob_in = data_blob(NULL, 0);
 582         DATA_BLOB blob_out = data_blob(NULL, 0);
 583
 584         cli_temp_set_signing(cli);
 585
 586         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_client_start(&ntlmssp_state))) {
 587                 return nt_status;
 588         }
 589
 590         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(ntlmssp_state, user))) {
 591                 return nt_status;
 592         }
 593         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(ntlmssp_state, domain))) {
 594                 return nt_status;
 595         }
 596         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_password(ntlmssp_state, pass))) {
 597                 return nt_status;
 598         }
 599
 600         do {
 601                 nt_status = ntlmssp_update(ntlmssp_state,
 602                                                   blob_in, &blob_out);
 603                 data_blob_free(&blob_in);
 604                 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED) || NT_STATUS_IS_OK(nt_status)) {
 605                         if (turn == 1) {
 606                                 /* and wrap it in a SPNEGO wrapper */
 607                                 msg1 = gen_negTokenInit(OID_NTLMSSP, blob_out);
 608                         } else {
 609                                 /* wrap it in SPNEGO */
 610                                 msg1 = spnego_gen_auth(blob_out);
 611                         }
 612
 613                         /* now send that blob on its way */
 614                         if (!cli_session_setup_blob_send(cli, msg1)) {
 615                                 DEBUG(3, ("Failed to send NTLMSSP/SPNEGO blob to server!\n"));
 616                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 617                         } else {
 618                                 data_blob_free(&msg1);
 619
 620                                 blob = cli_session_setup_blob_receive(cli);
 621
 622                                 nt_status = cli_nt_error(cli);
 623                                 if (cli_is_error(cli) && NT_STATUS_IS_OK(nt_status)) {
 624                                         if (cli->smb_rw_error == READ_BAD_SIG) {
 625                                                 nt_status = NT_STATUS_ACCESS_DENIED;
 626                                         } else {
 627                                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 628                                         }
 629                                 }
 630                         }
 631                 }
 632
 633                 if (!blob.length) {
 634                         if (NT_STATUS_IS_OK(nt_status)) {
 635                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 636                         }
 637                 } else if ((turn == 1) &&
 638                            NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 639                         DATA_BLOB tmp_blob = data_blob(NULL, 0);
 640                         /* the server might give us back two challenges */
 641                         if (!spnego_parse_challenge(blob, &blob_in,
 642                                                     &tmp_blob)) {
 643                                 DEBUG(3,("Failed to parse challenges\n"));
 644                                 nt_status = NT_STATUS_INVALID_PARAMETER;
 645                         }
 646                         data_blob_free(&tmp_blob);
 647                 } else {
 648                         if (!spnego_parse_auth_response(blob, nt_status,
 649                                                         &blob_in)) {
 650                                 DEBUG(3,("Failed to parse auth response\n"));
 651                                 if (NT_STATUS_IS_OK(nt_status)
 652                                     || NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED))
 653                                         nt_status = NT_STATUS_INVALID_PARAMETER;
 654                         }
 655                 }
 656                 data_blob_free(&blob);
 657                 data_blob_free(&blob_out);
 658                 turn++;
 659         } while (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED));
 660
 661         if (NT_STATUS_IS_OK(nt_status)) {
 662
 663                 DATA_BLOB key = data_blob(ntlmssp_state->session_key.data,
 664                                           ntlmssp_state->session_key.length);
 665                 DATA_BLOB null_blob = data_blob(NULL, 0);
 666                 BOOL res;
 667
 668                 fstrcpy(cli->server_domain, ntlmssp_state->server_domain);
 669                 cli_set_session_key(cli, ntlmssp_state->session_key);
 670
 671                 res = cli_simple_set_signing(cli, key, null_blob);
 672
 673                 data_blob_free(&key);
 674
 675                 if (res) {
 676
 677                         /* 'resign' the last message, so we get the right sequence numbers
 678                            for checking the first reply from the server */
 679                         cli_calculate_sign_mac(cli);
 680
 681                         if (!cli_check_sign_mac(cli)) {
 682                                 nt_status = NT_STATUS_ACCESS_DENIED;
 683                         }
 684                 }
 685         }
 686
 687         /* we have a reference conter on ntlmssp_state, if we are signing
 688            then the state will be kept by the signing engine */
 689
 690         ntlmssp_end(&ntlmssp_state);
 691
 692         return nt_status;
 693 }
 694
 695 /****************************************************************************
 696  Do a spnego encrypted session setup.
 697 ****************************************************************************/
 698
 699 ADS_STATUS cli_session_setup_spnego(struct cli_state *cli, const char *user,
 700                               const char *pass, const char *domain)
 701 {
 702         char *principal;
 703         char *OIDs[ASN1_MAX_OIDS];
 704         int i;
 705 #ifdef HAVE_KRB5
 706         BOOL got_kerberos_mechanism = False;
 707 #endif
 708         DATA_BLOB blob;
 709
 710         DEBUG(3,("Doing spnego session setup (blob length=%lu)\n", (unsigned long)cli->secblob.length));
 711
 712         /* the server might not even do spnego */
 713         if (cli->secblob.length <= 16) {
 714                 DEBUG(3,("server didn't supply a full spnego negprot\n"));
 715                 goto ntlmssp;
 716         }
 717
 718 #if 0
 719         file_save("negprot.dat", cli->secblob.data, cli->secblob.length);
 720 #endif
 721
 722         /* there is 16 bytes of GUID before the real spnego packet starts */
 723         blob = data_blob(cli->secblob.data+16, cli->secblob.length-16);
 724
 725         /* the server sent us the first part of the SPNEGO exchange in the negprot
 726            reply */
 727         if (!spnego_parse_negTokenInit(blob, OIDs, &principal)) {
 728                 data_blob_free(&blob);
 729                 return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 730         }
 731         data_blob_free(&blob);
 732
 733         /* make sure the server understands kerberos */
 734         for (i=0;OIDs[i];i++) {
 735                 DEBUG(3,("got OID=%s\n", OIDs[i]));
 736 #ifdef HAVE_KRB5
 737                 if (strcmp(OIDs[i], OID_KERBEROS5_OLD) == 0 ||
 738                     strcmp(OIDs[i], OID_KERBEROS5) == 0) {
 739                         got_kerberos_mechanism = True;
 740                 }
 741 #endif
 742                 free(OIDs[i]);
 743         }
 744         DEBUG(3,("got principal=%s\n", principal));
 745
 746         fstrcpy(cli->user_name, user);
 747
 748 #ifdef HAVE_KRB5
 749         /* If password is set we reauthenticate to kerberos server
 750          * and do not store results */
 751
 752         if (got_kerberos_mechanism && cli->use_kerberos) {
 753                 ADS_STATUS rc;
 754
 755                 if (pass && *pass) {
 756                         int ret;
 757
 758                         use_in_memory_ccache();
 759                         ret = kerberos_kinit_password(user, pass, 0 /* no time correction for now */, NULL);
 760
 761                         if (ret){
 762                                 SAFE_FREE(principal);
 763                                 DEBUG(0, ("Kinit failed: %s\n", error_message(ret)));
 764                                 if (cli->fallback_after_kerberos)
 765                                         goto ntlmssp;
 766                                 return ADS_ERROR_KRB5(ret);
 767                         }
 768                 }
 769
 770                 rc = cli_session_setup_kerberos(cli, principal, domain);
 771                 if (ADS_ERR_OK(rc) || !cli->fallback_after_kerberos) {
 772                         SAFE_FREE(principal);
 773                         return rc;
 774                 }
 775         }
 776 #endif
 777
 778         SAFE_FREE(principal);
 779
 780 ntlmssp:
 781
 782         return ADS_ERROR_NT(cli_session_setup_ntlmssp(cli, user, pass, domain));
 783 }
 784
 785 /****************************************************************************
 786  Send a session setup. The username and workgroup is in UNIX character
 787  format and must be converted to DOS codepage format before sending. If the
 788  password is in plaintext, the same should be done.
 789 ****************************************************************************/
 790
 791 BOOL cli_session_setup(struct cli_state *cli,
 792                        const char *user,
 793                        const char *pass, int passlen,
 794                        const char *ntpass, int ntpasslen,
 795                        const char *workgroup)
 796 {
 797         char *p;
 798         fstring user2;
 799
 800         /* allow for workgroups as part of the username */
 801         fstrcpy(user2, user);
 802         if ((p=strchr_m(user2,'\\')) || (p=strchr_m(user2,'/')) ||
 803             (p=strchr_m(user2,*lp_winbind_separator()))) {
 804                 *p = 0;
 805                 user = p+1;
 806                 workgroup = user2;
 807         }
 808
 809         if (cli->protocol < PROTOCOL_LANMAN1)
 810                 return True;
 811
 812         /* now work out what sort of session setup we are going to
 813            do. I have split this into separate functions to make the
 814            flow a bit easier to understand (tridge) */
 815
 816         /* if its an older server then we have to use the older request format */
 817
 818         if (cli->protocol < PROTOCOL_NT1) {
 819                 if (!lp_client_lanman_auth() && passlen != 24 && (*pass)) {
 820                         DEBUG(1, ("Server requested LM password but 'client lanman auth'"
 821                                   " is disabled\n"));
 822                         return False;
 823                 }
 824
 825                 if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0 &&
 826                     !lp_client_plaintext_auth() && (*pass)) {
 827                         DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
 828                                   " is disabled\n"));
 829                         return False;
 830                 }
 831
 832                 return cli_session_setup_lanman2(cli, user, pass, passlen, workgroup);
 833         }
 834
 835         /* if no user is supplied then we have to do an anonymous connection.
 836            passwords are ignored */
 837
 838         if (!user || !*user)
 839                 return cli_session_setup_guest(cli);
 840
 841         /* if the server is share level then send a plaintext null
 842            password at this point. The password is sent in the tree
 843            connect */
 844
 845         if ((cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) == 0)
 846                 return cli_session_setup_plaintext(cli, user, "", workgroup);
 847
 848         /* if the server doesn't support encryption then we have to use
 849            plaintext. The second password is ignored */
 850
 851         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0) {
 852                 if (!lp_client_plaintext_auth() && (*pass)) {
 853                         DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
 854                                   " is disabled\n"));
 855                         return False;
 856                 }
 857                 return cli_session_setup_plaintext(cli, user, pass, workgroup);
 858         }
 859
 860         /* if the server supports extended security then use SPNEGO */
 861
 862         if (cli->capabilities & CAP_EXTENDED_SECURITY) {
 863                 ADS_STATUS status = cli_session_setup_spnego(cli, user, pass, workgroup);
 864                 if (!ADS_ERR_OK(status)) {
 865                         DEBUG(3, ("SPNEGO login failed: %s\n", ads_errstr(status)));
 866                         return False;
 867                 }
 868         } else {
 869                 /* otherwise do a NT1 style session setup */
 870                 if ( !cli_session_setup_nt1(cli, user, pass, passlen, ntpass, ntpasslen, workgroup) ) {
 871                         DEBUG(3,("cli_session_setup: NT1 session setup failed!\n"));
 872                         return False;
 873                 }
 874         }
 875
 876         return True;
 877
 878 }
 879
 880 /****************************************************************************
 881  Send a uloggoff.
 882 *****************************************************************************/
 883
 884 BOOL cli_ulogoff(struct cli_state *cli)
 885 {
 886         memset(cli->outbuf,'\0',smb_size);
 887         set_message(cli->outbuf,2,0,True);
 888         SCVAL(cli->outbuf,smb_com,SMBulogoffX);
 889         cli_setup_packet(cli);
 890         SSVAL(cli->outbuf,smb_vwv0,0xFF);
 891         SSVAL(cli->outbuf,smb_vwv2,0);  /* no additional info */
 892
 893         cli_send_smb(cli);
 894         if (!cli_receive_smb(cli))
 895                 return False;
 896
 897         if (cli_is_error(cli)) {
 898                 return False;
 899         }
 900
 901         cli->cnum = -1;
 902         return True;
 903 }
 904
 905 /****************************************************************************
 906  Send a tconX.
 907 ****************************************************************************/
 908 BOOL cli_send_tconX(struct cli_state *cli,
 909                     const char *share, const char *dev, const char *pass, int passlen)
 910 {
 911         fstring fullshare, pword;
 912         char *p;
 913         memset(cli->outbuf,'\0',smb_size);
 914         memset(cli->inbuf,'\0',smb_size);
 915
 916         fstrcpy(cli->share, share);
 917
 918         /* in user level security don't send a password now */
 919         if (cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) {
 920                 passlen = 1;
 921                 pass = "";
 922         }
 923
 924         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) && *pass && passlen != 24) {
 925                 if (!lp_client_lanman_auth()) {
 926                         DEBUG(1, ("Server requested LANMAN password (share-level security) but 'client use lanman auth'"
 927                                   " is disabled\n"));
 928                         return False;
 929                 }
 930
 931                 /*
 932                  * Non-encrypted passwords - convert to DOS codepage before encryption.
 933                  */
 934                 passlen = 24;
 935                 SMBencrypt(pass,cli->secblob.data,(uchar *)pword);
 936         } else {
 937                 if((cli->sec_mode & (NEGOTIATE_SECURITY_USER_LEVEL|NEGOTIATE_SECURITY_CHALLENGE_RESPONSE)) == 0) {
 938                         if (!lp_client_plaintext_auth() && (*pass)) {
 939                                 DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
 940                                           " is disabled\n"));
 941                                 return False;
 942                         }
 943
 944                         /*
 945                          * Non-encrypted passwords - convert to DOS codepage before using.
 946                          */
 947                         passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
 948
 949                 } else {
 950                         memcpy(pword, pass, passlen);
 951                 }
 952         }
 953
 954         slprintf(fullshare, sizeof(fullshare)-1,
 955                  "\\\\%s\\%s", cli->desthost, share);
 956
 957         set_message(cli->outbuf,4, 0, True);
 958         SCVAL(cli->outbuf,smb_com,SMBtconX);
 959         cli_setup_packet(cli);
 960
 961         SSVAL(cli->outbuf,smb_vwv0,0xFF);
 962         SSVAL(cli->outbuf,smb_vwv3,passlen);
 963
 964         p = smb_buf(cli->outbuf);
 965         memcpy(p,pword,passlen);
 966         p += passlen;
 967         p += clistr_push(cli, p, fullshare, -1, STR_TERMINATE |STR_UPPER);
 968         p += clistr_push(cli, p, dev, -1, STR_TERMINATE |STR_UPPER | STR_ASCII);
 969
 970         cli_setup_bcc(cli, p);
 971
 972         cli_send_smb(cli);
 973         if (!cli_receive_smb(cli))
 974                 return False;
 975
 976         if (cli_is_error(cli))
 977                 return False;
 978
 979         clistr_pull(cli, cli->dev, smb_buf(cli->inbuf), sizeof(fstring), -1, STR_TERMINATE|STR_ASCII);
 980
 981         if (cli->protocol >= PROTOCOL_NT1 &&
 982             smb_buflen(cli->inbuf) == 3) {
 983                 /* almost certainly win95 - enable bug fixes */
 984                 cli->win95 = True;
 985         }
 986
 987         /* Make sure that we have the optional support 16-bit field.  WCT > 2 */
 988         /* Avoids issues when connecting to Win9x boxes sharing files */
 989
 990         cli->dfsroot = False;
 991         if ( (CVAL(cli->inbuf, smb_wct))>2 && cli->protocol >= PROTOCOL_LANMAN2 )
 992                 cli->dfsroot = (SVAL( cli->inbuf, smb_vwv2 ) & SMB_SHARE_IN_DFS) ? True : False;
 993
 994         cli->cnum = SVAL(cli->inbuf,smb_tid);
 995         return True;
 996 }
 997
 998 /****************************************************************************
 999  Send a tree disconnect.
1000 ****************************************************************************/
1001
1002 BOOL cli_tdis(struct cli_state *cli)
1003 {
1004         memset(cli->outbuf,'\0',smb_size);
1005         set_message(cli->outbuf,0,0,True);
1006         SCVAL(cli->outbuf,smb_com,SMBtdis);
1007         SSVAL(cli->outbuf,smb_tid,cli->cnum);
1008         cli_setup_packet(cli);
1009
1010         cli_send_smb(cli);
1011         if (!cli_receive_smb(cli))
1012                 return False;
1013
1014         if (cli_is_error(cli)) {
1015                 return False;
1016         }
1017
1018         cli->cnum = -1;
1019         return True;
1020 }
1021
1022 /****************************************************************************
1023  Send a negprot command.
1024 ****************************************************************************/
1025
1026 void cli_negprot_send(struct cli_state *cli)
1027 {
1028         char *p;
1029         int numprots;
1030
1031         if (cli->protocol < PROTOCOL_NT1)
1032                 cli->use_spnego = False;
1033
1034         memset(cli->outbuf,'\0',smb_size);
1035
1036         /* setup the protocol strings */
1037         set_message(cli->outbuf,0,0,True);
1038
1039         p = smb_buf(cli->outbuf);
1040         for (numprots=0;
1041              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1042              numprots++) {
1043                 *p++ = 2;
1044                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1045         }
1046
1047         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1048         cli_setup_bcc(cli, p);
1049         cli_setup_packet(cli);
1050
1051         SCVAL(smb_buf(cli->outbuf),0,2);
1052
1053         cli_send_smb(cli);
1054 }
1055
1056 /****************************************************************************
1057  Send a negprot command.
1058 ****************************************************************************/
1059
1060 BOOL cli_negprot(struct cli_state *cli)
1061 {
1062         char *p;
1063         int numprots;
1064         int plength;
1065
1066         if (cli->protocol < PROTOCOL_NT1)
1067                 cli->use_spnego = False;
1068
1069         memset(cli->outbuf,'\0',smb_size);
1070
1071         /* setup the protocol strings */
1072         for (plength=0,numprots=0;
1073              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1074              numprots++)
1075                 plength += strlen(prots[numprots].name)+2;
1076
1077         set_message(cli->outbuf,0,plength,True);
1078
1079         p = smb_buf(cli->outbuf);
1080         for (numprots=0;
1081              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1082              numprots++) {
1083                 *p++ = 2;
1084                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1085         }
1086
1087         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1088         cli_setup_packet(cli);
1089
1090         SCVAL(smb_buf(cli->outbuf),0,2);
1091
1092         cli_send_smb(cli);
1093         if (!cli_receive_smb(cli))
1094                 return False;
1095
1096         show_msg(cli->inbuf);
1097
1098         if (cli_is_error(cli) ||
1099             ((int)SVAL(cli->inbuf,smb_vwv0) >= numprots)) {
1100                 return(False);
1101         }
1102
1103         cli->protocol = prots[SVAL(cli->inbuf,smb_vwv0)].prot;
1104
1105         if ((cli->protocol < PROTOCOL_NT1) && cli->sign_info.mandatory_signing) {
1106                 DEBUG(0,("cli_negprot: SMB signing is mandatory and the selected protocol level doesn't support it.\n"));
1107                 return False;
1108         }
1109
1110         if (cli->protocol >= PROTOCOL_NT1) {
1111                 /* NT protocol */
1112                 cli->sec_mode = CVAL(cli->inbuf,smb_vwv1);
1113                 cli->max_mux = SVAL(cli->inbuf, smb_vwv1+1);
1114                 cli->max_xmit = IVAL(cli->inbuf,smb_vwv3+1);
1115                 cli->sesskey = IVAL(cli->inbuf,smb_vwv7+1);
1116                 cli->serverzone = SVALS(cli->inbuf,smb_vwv15+1);
1117                 cli->serverzone *= 60;
1118                 /* this time arrives in real GMT */
1119                 cli->servertime = interpret_long_date(cli->inbuf+smb_vwv11+1);
1120                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1121                 cli->capabilities = IVAL(cli->inbuf,smb_vwv9+1);
1122                 if (cli->capabilities & CAP_RAW_MODE) {
1123                         cli->readbraw_supported = True;
1124                         cli->writebraw_supported = True;
1125                 }
1126                 /* work out if they sent us a workgroup */
1127                 if (!(cli->capabilities & CAP_EXTENDED_SECURITY) &&
1128                     smb_buflen(cli->inbuf) > 8) {
1129                         clistr_pull(cli, cli->server_domain,
1130                                     smb_buf(cli->inbuf)+8, sizeof(cli->server_domain),
1131                                     smb_buflen(cli->inbuf)-8, STR_UNICODE|STR_NOALIGN);
1132                 }
1133
1134                 /*
1135                  * As signing is slow we only turn it on if either the client or
1136                  * the server require it. JRA.
1137                  */
1138
1139                 if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
1140                         /* Fail if server says signing is mandatory and we don't want to support it. */
1141                         if (!cli->sign_info.allow_smb_signing) {
1142                                 DEBUG(0,("cli_negprot: SMB signing is mandatory and we have disabled it.\n"));
1143                                 return False;
1144                         }
1145                         cli->sign_info.negotiated_smb_signing = True;
1146                         cli->sign_info.mandatory_signing = True;
1147                 } else if (cli->sign_info.mandatory_signing && cli->sign_info.allow_smb_signing) {
1148                         /* Fail if client says signing is mandatory and the server doesn't support it. */
1149                         if (!(cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED)) {
1150                                 DEBUG(1,("cli_negprot: SMB signing is mandatory and the server doesn't support it.\n"));
1151                                 return False;
1152                         }
1153                         cli->sign_info.negotiated_smb_signing = True;
1154                         cli->sign_info.mandatory_signing = True;
1155                 } else if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
1156                         cli->sign_info.negotiated_smb_signing = True;
1157                 }
1158
1159                 if (cli->capabilities & (CAP_LARGE_READX|CAP_LARGE_WRITEX)) {
1160                         SAFE_FREE(cli->outbuf);
1161                         SAFE_FREE(cli->inbuf);
1162                         cli->outbuf = (char *)SMB_MALLOC(CLI_MAX_LARGE_READX_SIZE+SAFETY_MARGIN);
1163                         cli->inbuf = (char *)SMB_MALLOC(CLI_MAX_LARGE_READX_SIZE+SAFETY_MARGIN);
1164                         cli->bufsize = CLI_MAX_LARGE_READX_SIZE;
1165                 }
1166
1167         } else if (cli->protocol >= PROTOCOL_LANMAN1) {
1168                 cli->use_spnego = False;
1169                 cli->sec_mode = SVAL(cli->inbuf,smb_vwv1);
1170                 cli->max_xmit = SVAL(cli->inbuf,smb_vwv2);
1171                 cli->max_mux = SVAL(cli->inbuf, smb_vwv3);
1172                 cli->sesskey = IVAL(cli->inbuf,smb_vwv6);
1173                 cli->serverzone = SVALS(cli->inbuf,smb_vwv10);
1174                 cli->serverzone *= 60;
1175                 /* this time is converted to GMT by make_unix_date */
1176                 cli->servertime = cli_make_unix_date(cli,cli->inbuf+smb_vwv8);
1177                 cli->readbraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x1) != 0);
1178                 cli->writebraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x2) != 0);
1179                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1180         } else {
1181                 /* the old core protocol */
1182                 cli->use_spnego = False;
1183                 cli->sec_mode = 0;
1184                 cli->serverzone = get_time_zone(time(NULL));
1185         }
1186
1187         cli->max_xmit = MIN(cli->max_xmit, CLI_BUFFER_SIZE);
1188
1189         /* a way to force ascii SMB */
1190         if (getenv("CLI_FORCE_ASCII"))
1191                 cli->capabilities &= ~CAP_UNICODE;
1192
1193         return True;
1194 }
1195
1196 /****************************************************************************
1197  Send a session request. See rfc1002.txt 4.3 and 4.3.2.
1198 ****************************************************************************/
1199
1200 BOOL cli_session_request(struct cli_state *cli,
1201                          struct nmb_name *calling, struct nmb_name *called)
1202 {
1203         char *p;
1204         int len = 4;
1205
1206         memcpy(&(cli->calling), calling, sizeof(*calling));
1207         memcpy(&(cli->called ), called , sizeof(*called ));
1208
1209         /* put in the destination name */
1210         p = cli->outbuf+len;
1211         name_mangle(cli->called .name, p, cli->called .name_type);
1212         len += name_len(p);
1213
1214         /* and my name */
1215         p = cli->outbuf+len;
1216         name_mangle(cli->calling.name, p, cli->calling.name_type);
1217         len += name_len(p);
1218
1219         /* 445 doesn't have session request */
1220         if (cli->port == 445)
1221                 return True;
1222
1223         /* send a session request (RFC 1002) */
1224         /* setup the packet length
1225          * Remove four bytes from the length count, since the length
1226          * field in the NBT Session Service header counts the number
1227          * of bytes which follow.  The cli_send_smb() function knows
1228          * about this and accounts for those four bytes.
1229          * CRH.
1230          */
1231         len -= 4;
1232         _smb_setlen(cli->outbuf,len);
1233         SCVAL(cli->outbuf,0,0x81);
1234
1235         cli_send_smb(cli);
1236         DEBUG(5,("Sent session request\n"));
1237
1238         if (!cli_receive_smb(cli))
1239                 return False;
1240
1241         if (CVAL(cli->inbuf,0) == 0x84) {
1242                 /* C. Hoch  9/14/95 Start */
1243                 /* For information, here is the response structure.
1244                  * We do the byte-twiddling to for portability.
1245                 struct RetargetResponse{
1246                 unsigned char type;
1247                 unsigned char flags;
1248                 int16 length;
1249                 int32 ip_addr;
1250                 int16 port;
1251                 };
1252                 */
1253                 int port = (CVAL(cli->inbuf,8)<<8)+CVAL(cli->inbuf,9);
1254                 /* SESSION RETARGET */
1255                 putip((char *)&cli->dest_ip,cli->inbuf+4);
1256
1257                 cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip, port, LONG_CONNECT_TIMEOUT);
1258                 if (cli->fd == -1)
1259                         return False;
1260
1261                 DEBUG(3,("Retargeted\n"));
1262
1263                 set_socket_options(cli->fd,user_socket_options);
1264
1265                 /* Try again */
1266                 {
1267                         static int depth;
1268                         BOOL ret;
1269                         if (depth > 4) {
1270                                 DEBUG(0,("Retarget recursion - failing\n"));
1271                                 return False;
1272                         }
1273                         depth++;
1274                         ret = cli_session_request(cli, calling, called);
1275                         depth--;
1276                         return ret;
1277                 }
1278         } /* C. Hoch 9/14/95 End */
1279
1280         if (CVAL(cli->inbuf,0) != 0x82) {
1281                 /* This is the wrong place to put the error... JRA. */
1282                 cli->rap_error = CVAL(cli->inbuf,4);
1283                 return False;
1284         }
1285         return(True);
1286 }
1287
1288 /****************************************************************************
1289  Open the client sockets.
1290 ****************************************************************************/
1291
1292 BOOL cli_connect(struct cli_state *cli, const char *host, struct in_addr *ip)
1293 {
1294         int name_type = 0x20;
1295         char *p;
1296
1297         /* reasonable default hostname */
1298         if (!host) host = "*SMBSERVER";
1299
1300         fstrcpy(cli->desthost, host);
1301
1302         /* allow hostnames of the form NAME#xx and do a netbios lookup */
1303         if ((p = strchr(cli->desthost, '#'))) {
1304                 name_type = strtol(p+1, NULL, 16);
1305                 *p = 0;
1306         }
1307
1308         if (!ip || is_zero_ip(*ip)) {
1309                 if (!resolve_name(cli->desthost, &cli->dest_ip, name_type)) {
1310                         return False;
1311                 }
1312                 if (ip) *ip = cli->dest_ip;
1313         } else {
1314                 cli->dest_ip = *ip;
1315         }
1316
1317         if (getenv("LIBSMB_PROG")) {
1318                 cli->fd = sock_exec(getenv("LIBSMB_PROG"));
1319         } else {
1320                 /* try 445 first, then 139 */
1321                 int port = cli->port?cli->port:445;
1322                 cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip,
1323                                           port, cli->timeout);
1324                 if (cli->fd == -1 && cli->port == 0) {
1325                         port = 139;
1326                         cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip,
1327                                                   port, cli->timeout);
1328                 }
1329                 if (cli->fd != -1)
1330                         cli->port = port;
1331         }
1332         if (cli->fd == -1) {
1333                 DEBUG(1,("Error connecting to %s (%s)\n",
1334                          ip?inet_ntoa(*ip):host,strerror(errno)));
1335                 return False;
1336         }
1337
1338         set_socket_options(cli->fd,user_socket_options);
1339
1340         return True;
1341 }
1342
1343 /**
1344    establishes a connection to after the negprot.
1345    @param output_cli A fully initialised cli structure, non-null only on success
1346    @param dest_host The netbios name of the remote host
1347    @param dest_ip (optional) The the destination IP, NULL for name based lookup
1348    @param port (optional) The destination port (0 for default)
1349    @param retry BOOL. Did this connection fail with a retryable error ?
1350
1351 */
1352 NTSTATUS cli_start_connection(struct cli_state **output_cli,
1353                               const char *my_name,
1354                               const char *dest_host,
1355                               struct in_addr *dest_ip, int port,
1356                               int signing_state, int flags,
1357                               BOOL *retry)
1358 {
1359         NTSTATUS nt_status;
1360         struct nmb_name calling;
1361         struct nmb_name called;
1362         struct cli_state *cli;
1363         struct in_addr ip;
1364
1365         if (retry)
1366                 *retry = False;
1367
1368         if (!my_name)
1369                 my_name = global_myname();
1370
1371         if (!(cli = cli_initialise(NULL)))
1372                 return NT_STATUS_NO_MEMORY;
1373
1374         make_nmb_name(&calling, my_name, 0x0);
1375         make_nmb_name(&called , dest_host, 0x20);
1376
1377         if (cli_set_port(cli, port) != port) {
1378                 cli_shutdown(cli);
1379                 return NT_STATUS_UNSUCCESSFUL;
1380         }
1381
1382         cli_set_timeout(cli, 10000); /* 10 seconds. */
1383
1384         if (dest_ip)
1385                 ip = *dest_ip;
1386         else
1387                 ZERO_STRUCT(ip);
1388
1389 again:
1390
1391         DEBUG(3,("Connecting to host=%s\n", dest_host));
1392
1393         if (!cli_connect(cli, dest_host, &ip)) {
1394                 DEBUG(1,("cli_start_connection: failed to connect to %s (%s)\n",
1395                          nmb_namestr(&called), inet_ntoa(ip)));
1396                 cli_shutdown(cli);
1397                 if (is_zero_ip(ip)) {
1398                         return NT_STATUS_BAD_NETWORK_NAME;
1399                 } else {
1400                         return NT_STATUS_CONNECTION_REFUSED;
1401                 }
1402         }
1403
1404         if (retry)
1405                 *retry = True;
1406
1407         if (!cli_session_request(cli, &calling, &called)) {
1408                 char *p;
1409                 DEBUG(1,("session request to %s failed (%s)\n",
1410                          called.name, cli_errstr(cli)));
1411                 if ((p=strchr(called.name, '.')) && !is_ipaddress(called.name)) {
1412                         *p = 0;
1413                         goto again;
1414                 }
1415                 if (strcmp(called.name, "*SMBSERVER")) {
1416                         make_nmb_name(&called , "*SMBSERVER", 0x20);
1417                         goto again;
1418                 }
1419                 return NT_STATUS_BAD_NETWORK_NAME;
1420         }
1421
1422         cli_setup_signing_state(cli, signing_state);
1423
1424         if (flags & CLI_FULL_CONNECTION_DONT_SPNEGO)
1425                 cli->use_spnego = False;
1426         else if (flags & CLI_FULL_CONNECTION_USE_KERBEROS)
1427                 cli->use_kerberos = True;
1428
1429         if (!cli_negprot(cli)) {
1430                 DEBUG(1,("failed negprot\n"));
1431                 nt_status = cli_nt_error(cli);
1432                 if (NT_STATUS_IS_OK(nt_status)) {
1433                         nt_status = NT_STATUS_UNSUCCESSFUL;
1434                 }
1435                 cli_shutdown(cli);
1436                 return nt_status;
1437         }
1438
1439         *output_cli = cli;
1440         return NT_STATUS_OK;
1441 }
1442
1443
1444 /**
1445    establishes a connection right up to doing tconX, password specified.
1446    @param output_cli A fully initialised cli structure, non-null only on success
1447    @param dest_host The netbios name of the remote host
1448    @param dest_ip (optional) The the destination IP, NULL for name based lookup
1449    @param port (optional) The destination port (0 for default)
1450    @param service (optional) The share to make the connection to.  Should be 'unqualified' in any way.
1451    @param service_type The 'type' of serivice.
1452    @param user Username, unix string
1453    @param domain User's domain
1454    @param password User's password, unencrypted unix string.
1455    @param retry BOOL. Did this connection fail with a retryable error ?
1456 */
1457
1458 NTSTATUS cli_full_connection(struct cli_state **output_cli,
1459                              const char *my_name,
1460                              const char *dest_host,
1461                              struct in_addr *dest_ip, int port,
1462                              const char *service, const char *service_type,
1463                              const char *user, const char *domain,
1464                              const char *password, int flags,
1465                              int signing_state,
1466                              BOOL *retry)
1467 {
1468         NTSTATUS nt_status;
1469         struct cli_state *cli = NULL;
1470
1471         nt_status = cli_start_connection(&cli, my_name, dest_host,
1472                                          dest_ip, port, signing_state, flags, retry);
1473
1474         if (!NT_STATUS_IS_OK(nt_status)) {
1475                 return nt_status;
1476         }
1477
1478         if (!cli_session_setup(cli, user, password, strlen(password)+1,
1479                                password, strlen(password)+1,
1480                                domain)) {
1481                 if ((flags & CLI_FULL_CONNECTION_ANNONYMOUS_FALLBACK)
1482                     && cli_session_setup(cli, "", "", 0, "", 0, domain)) {
1483                 } else {
1484                         nt_status = cli_nt_error(cli);
1485                         DEBUG(1,("failed session setup with %s\n", nt_errstr(nt_status)));
1486                         cli_shutdown(cli);
1487                         if (NT_STATUS_IS_OK(nt_status))
1488                                 nt_status = NT_STATUS_UNSUCCESSFUL;
1489                         return nt_status;
1490                 }
1491         }
1492
1493         if (service) {
1494                 if (!cli_send_tconX(cli, service, service_type,
1495                                     password, strlen(password)+1)) {
1496                         nt_status = cli_nt_error(cli);
1497                         DEBUG(1,("failed tcon_X with %s\n", nt_errstr(nt_status)));
1498                         cli_shutdown(cli);
1499                         if (NT_STATUS_IS_OK(nt_status)) {
1500                                 nt_status = NT_STATUS_UNSUCCESSFUL;
1501                         }
1502                         return nt_status;
1503                 }
1504         }
1505
1506         cli_init_creds(cli, user, domain, password);
1507
1508         *output_cli = cli;
1509         return NT_STATUS_OK;
1510 }
1511
1512 /****************************************************************************
1513  Attempt a NetBIOS session request, falling back to *SMBSERVER if needed.
1514 ****************************************************************************/
1515
1516 BOOL attempt_netbios_session_request(struct cli_state *cli, const char *srchost, const char *desthost,
1517                                      struct in_addr *pdest_ip)
1518 {
1519         struct nmb_name calling, called;
1520
1521         make_nmb_name(&calling, srchost, 0x0);
1522
1523         /*
1524          * If the called name is an IP address
1525          * then use *SMBSERVER immediately.
1526          */
1527
1528         if(is_ipaddress(desthost))
1529                 make_nmb_name(&called, "*SMBSERVER", 0x20);
1530         else
1531                 make_nmb_name(&called, desthost, 0x20);
1532
1533         if (!cli_session_request(cli, &calling, &called)) {
1534                 struct nmb_name smbservername;
1535
1536                 make_nmb_name(&smbservername , "*SMBSERVER", 0x20);
1537
1538                 /*
1539                  * If the name wasn't *SMBSERVER then
1540                  * try with *SMBSERVER if the first name fails.
1541                  */
1542
1543                 if (nmb_name_equal(&called, &smbservername)) {
1544
1545                         /*
1546                          * The name used was *SMBSERVER, don't bother with another name.
1547                          */
1548
1549                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for name *SMBSERVER \
1550 with error %s.\n", desthost, cli_errstr(cli) ));
1551                         return False;
1552                 }
1553
1554                 /*
1555                  * We need to close the connection here but can't call cli_shutdown as
1556                  * will free an allocated cli struct. cli_close_connection was invented
1557                  * for this purpose. JRA. Based on work by "Kim R. Pedersen" <krp@filanet.dk>.
1558                  */
1559
1560                 cli_close_connection(cli);
1561
1562                 if (!cli_initialise(cli) ||
1563                                 !cli_connect(cli, desthost, pdest_ip) ||
1564                                 !cli_session_request(cli, &calling, &smbservername)) {
1565                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for \
1566 name *SMBSERVER with error %s\n", desthost, cli_errstr(cli) ));
1567                         return False;
1568                 }
1569         }
1570
1571         return True;
1572 }
1573
1574
1575
1576
1577
1578 /****************************************************************************
1579  Send an old style tcon.
1580 ****************************************************************************/
1581 NTSTATUS cli_raw_tcon(struct cli_state *cli,
1582                       const char *service, const char *pass, const char *dev,
1583                       uint16 *max_xmit, uint16 *tid)
1584 {
1585         char *p;
1586
1587         if (!lp_client_plaintext_auth() && (*pass)) {
1588                 DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
1589                           " is disabled\n"));
1590                 return NT_STATUS_ACCESS_DENIED;
1591         }
1592
1593         memset(cli->outbuf,'\0',smb_size);
1594         memset(cli->inbuf,'\0',smb_size);
1595
1596         set_message(cli->outbuf, 0, 0, True);
1597         SCVAL(cli->outbuf,smb_com,SMBtcon);
1598         cli_setup_packet(cli);
1599
1600         p = smb_buf(cli->outbuf);
1601         *p++ = 4; p += clistr_push(cli, p, service, -1, STR_TERMINATE | STR_NOALIGN);
1602         *p++ = 4; p += clistr_push(cli, p, pass, -1, STR_TERMINATE | STR_NOALIGN);
1603         *p++ = 4; p += clistr_push(cli, p, dev, -1, STR_TERMINATE | STR_NOALIGN);
1604
1605         cli_setup_bcc(cli, p);
1606
1607         cli_send_smb(cli);
1608         if (!cli_receive_smb(cli)) {
1609                 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
1610         }
1611
1612         if (cli_is_error(cli)) {
1613                 return cli_nt_error(cli);
1614         }
1615
1616         *max_xmit = SVAL(cli->inbuf, smb_vwv0);
1617         *tid = SVAL(cli->inbuf, smb_vwv1);
1618
1619         return NT_STATUS_OK;
1620 }
1621
1622 /* Return a cli_state pointing at the IPC$ share for the given server */
1623
1624 struct cli_state *get_ipc_connect(char *server, struct in_addr *server_ip,
1625                                          struct user_auth_info *user_info)
1626 {
1627         struct cli_state *cli;
1628         pstring myname;
1629         NTSTATUS nt_status;
1630
1631         get_myname(myname);
1632
1633         nt_status = cli_full_connection(&cli, myname, server, server_ip, 0, "IPC$", "IPC",
1634                                         user_info->username, lp_workgroup(), user_info->password,
1635                                         CLI_FULL_CONNECTION_ANNONYMOUS_FALLBACK, Undefined, NULL);
1636
1637         if (NT_STATUS_IS_OK(nt_status)) {
1638                 return cli;
1639         } else if (is_ipaddress(server)) {
1640             /* windows 9* needs a correct NMB name for connections */
1641             fstring remote_name;
1642
1643             if (name_status_find("*", 0, 0, *server_ip, remote_name)) {
1644                 cli = get_ipc_connect(remote_name, server_ip, user_info);
1645                 if (cli)
1646                     return cli;
1647             }
1648         }
1649         return NULL;
1650 }
1651
1652 /*
1653  * Given the IP address of a master browser on the network, return its
1654  * workgroup and connect to it.
1655  *
1656  * This function is provided to allow additional processing beyond what
1657  * get_ipc_connect_master_ip_bcast() does, e.g. to retrieve the list of master
1658  * browsers and obtain each master browsers' list of domains (in case the
1659  * first master browser is recently on the network and has not yet
1660  * synchronized with other master browsers and therefore does not yet have the
1661  * entire network browse list)
1662  */
1663
1664 struct cli_state *get_ipc_connect_master_ip(struct ip_service * mb_ip, pstring workgroup, struct user_auth_info *user_info)
1665 {
1666         static fstring name;
1667         struct cli_state *cli;
1668         struct in_addr server_ip;
1669
1670         DEBUG(99, ("Looking up name of master browser %s\n",
1671                    inet_ntoa(mb_ip->ip)));
1672
1673         /*
1674          * Do a name status query to find out the name of the master browser.
1675          * We use <01><02>__MSBROWSE__<02>#01 if *#00 fails because a domain
1676          * master browser will not respond to a wildcard query (or, at least,
1677          * an NT4 server acting as the domain master browser will not).
1678          *
1679          * We might be able to use ONLY the query on MSBROWSE, but that's not
1680          * yet been tested with all Windows versions, so until it is, leave
1681          * the original wildcard query as the first choice and fall back to
1682          * MSBROWSE if the wildcard query fails.
1683          */
1684         if (!name_status_find("*", 0, 0x1d, mb_ip->ip, name) &&
1685             !name_status_find(MSBROWSE, 1, 0x1d, mb_ip->ip, name)) {
1686
1687                 DEBUG(99, ("Could not retrieve name status for %s\n",
1688                            inet_ntoa(mb_ip->ip)));
1689                 return NULL;
1690         }
1691
1692         if (!find_master_ip(name, &server_ip)) {
1693                 DEBUG(99, ("Could not find master ip for %s\n", name));
1694                 return NULL;
1695         }
1696
1697                 pstrcpy(workgroup, name);
1698
1699                 DEBUG(4, ("found master browser %s, %s\n",
1700                   name, inet_ntoa(mb_ip->ip)));
1701
1702                 cli = get_ipc_connect(inet_ntoa(server_ip), &server_ip, user_info);
1703
1704                 return cli;
1705
1706 }
1707
1708 /*
1709  * Return the IP address and workgroup of a master browser on the network, and
1710  * connect to it.
1711  */
1712
1713 struct cli_state *get_ipc_connect_master_ip_bcast(pstring workgroup, struct user_auth_info *user_info)
1714 {
1715         struct ip_service *ip_list;
1716         struct cli_state *cli;
1717         int i, count;
1718
1719         DEBUG(99, ("Do broadcast lookup for workgroups on local network\n"));
1720
1721         /* Go looking for workgroups by broadcasting on the local network */
1722
1723         if (!name_resolve_bcast(MSBROWSE, 1, &ip_list, &count)) {
1724                 DEBUG(99, ("No master browsers responded\n"));
1725                 return False;
1726         }
1727
1728         for (i = 0; i < count; i++) {
1729             DEBUG(99, ("Found master browser %s\n", inet_ntoa(ip_list[i].ip)));
1730
1731             cli = get_ipc_connect_master_ip(&ip_list[i], workgroup, user_info);
1732             if (cli)
1733                     return(cli);
1734         }
1735
1736         return NULL;
1737 }