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 3 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, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22
  23 static const struct {
  24         int prot;
  25         const char *name;
  26 } prots[] = {
  27         {PROTOCOL_CORE,"PC NETWORK PROGRAM 1.0"},
  28         {PROTOCOL_COREPLUS,"MICROSOFT NETWORKS 1.03"},
  29         {PROTOCOL_LANMAN1,"MICROSOFT NETWORKS 3.0"},
  30         {PROTOCOL_LANMAN1,"LANMAN1.0"},
  31         {PROTOCOL_LANMAN2,"LM1.2X002"},
  32         {PROTOCOL_LANMAN2,"DOS LANMAN2.1"},
  33         {PROTOCOL_LANMAN2,"LANMAN2.1"},
  34         {PROTOCOL_LANMAN2,"Samba"},
  35         {PROTOCOL_NT1,"NT LANMAN 1.0"},
  36         {PROTOCOL_NT1,"NT LM 0.12"},
  37         {-1,NULL}
  38 };
  39
  40 static const char *star_smbserver_name = "*SMBSERVER";
  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 NTSTATUS cli_session_setup_lanman2(struct cli_state *cli,
  59                                           const char *user,
  60                                           const char *pass, size_t passlen,
  61                                           const char *workgroup)
  62 {
  63         DATA_BLOB session_key = data_blob_null;
  64         DATA_BLOB lm_response = data_blob_null;
  65         fstring pword;
  66         char *p;
  67
  68         if (passlen > sizeof(pword)-1) {
  69                 return NT_STATUS_INVALID_PARAMETER;
  70         }
  71
  72         /* LANMAN servers predate NT status codes and Unicode and ignore those
  73            smb flags so we must disable the corresponding default capabilities
  74            that would otherwise cause the Unicode and NT Status flags to be
  75            set (and even returned by the server) */
  76
  77         cli->capabilities &= ~(CAP_UNICODE | CAP_STATUS32);
  78
  79         /* if in share level security then don't send a password now */
  80         if (!(cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL))
  81                 passlen = 0;
  82
  83         if (passlen > 0 && (cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) && passlen != 24) {
  84                 /* Encrypted mode needed, and non encrypted password supplied. */
  85                 lm_response = data_blob(NULL, 24);
  86                 if (!SMBencrypt(pass, cli->secblob.data,(uchar *)lm_response.data)) {
  87                         DEBUG(1, ("Password is > 14 chars in length, and is therefore incompatible with Lanman authentication\n"));
  88                         return NT_STATUS_ACCESS_DENIED;
  89                 }
  90         } else if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) && passlen == 24) {
  91                 /* Encrypted mode needed, and encrypted password supplied. */
  92                 lm_response = data_blob(pass, passlen);
  93         } else if (passlen > 0) {
  94                 /* Plaintext mode needed, assume plaintext supplied. */
  95                 passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
  96                 lm_response = data_blob(pass, passlen);
  97         }
  98
  99         /* send a session setup command */
 100         memset(cli->outbuf,'\0',smb_size);
 101         cli_set_message(cli->outbuf,10, 0, True);
 102         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 103         cli_setup_packet(cli);
 104
 105         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 106         SSVAL(cli->outbuf,smb_vwv2,cli->max_xmit);
 107         SSVAL(cli->outbuf,smb_vwv3,2);
 108         SSVAL(cli->outbuf,smb_vwv4,1);
 109         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 110         SSVAL(cli->outbuf,smb_vwv7,lm_response.length);
 111
 112         p = smb_buf(cli->outbuf);
 113         memcpy(p,lm_response.data,lm_response.length);
 114         p += lm_response.length;
 115         p += clistr_push(cli, p, user, -1, STR_TERMINATE|STR_UPPER);
 116         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE|STR_UPPER);
 117         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 118         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 119         cli_setup_bcc(cli, p);
 120
 121         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 122                 return cli_nt_error(cli);
 123         }
 124
 125         show_msg(cli->inbuf);
 126
 127         if (cli_is_error(cli)) {
 128                 return cli_nt_error(cli);
 129         }
 130
 131         /* use the returned vuid from now on */
 132         cli->vuid = SVAL(cli->inbuf,smb_uid);
 133         fstrcpy(cli->user_name, user);
 134
 135         if (session_key.data) {
 136                 /* Have plaintext orginal */
 137                 cli_set_session_key(cli, session_key);
 138         }
 139
 140         return NT_STATUS_OK;
 141 }
 142
 143 /****************************************************************************
 144  Work out suitable capabilities to offer the server.
 145 ****************************************************************************/
 146
 147 static uint32 cli_session_setup_capabilities(struct cli_state *cli)
 148 {
 149         uint32 capabilities = CAP_NT_SMBS;
 150
 151         if (!cli->force_dos_errors)
 152                 capabilities |= CAP_STATUS32;
 153
 154         if (cli->use_level_II_oplocks)
 155                 capabilities |= CAP_LEVEL_II_OPLOCKS;
 156
 157         capabilities |= (cli->capabilities & (CAP_UNICODE|CAP_LARGE_FILES|CAP_LARGE_READX|CAP_LARGE_WRITEX|CAP_DFS));
 158         return capabilities;
 159 }
 160
 161 /****************************************************************************
 162  Do a NT1 guest session setup.
 163 ****************************************************************************/
 164
 165 static NTSTATUS cli_session_setup_guest(struct cli_state *cli)
 166 {
 167         char *p;
 168         uint32 capabilities = cli_session_setup_capabilities(cli);
 169
 170         memset(cli->outbuf, '\0', smb_size);
 171         cli_set_message(cli->outbuf,13,0,True);
 172         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 173         cli_setup_packet(cli);
 174
 175         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 176         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 177         SSVAL(cli->outbuf,smb_vwv3,2);
 178         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 179         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 180         SSVAL(cli->outbuf,smb_vwv7,0);
 181         SSVAL(cli->outbuf,smb_vwv8,0);
 182         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 183         p = smb_buf(cli->outbuf);
 184         p += clistr_push(cli, p, "", -1, STR_TERMINATE); /* username */
 185         p += clistr_push(cli, p, "", -1, STR_TERMINATE); /* workgroup */
 186         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 187         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 188         cli_setup_bcc(cli, p);
 189
 190         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 191                 return cli_nt_error(cli);
 192         }
 193
 194         show_msg(cli->inbuf);
 195
 196         if (cli_is_error(cli)) {
 197                 return cli_nt_error(cli);
 198         }
 199
 200         cli->vuid = SVAL(cli->inbuf,smb_uid);
 201
 202         p = smb_buf(cli->inbuf);
 203         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 204         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 205         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 206
 207         if (strstr(cli->server_type, "Samba")) {
 208                 cli->is_samba = True;
 209         }
 210
 211         fstrcpy(cli->user_name, "");
 212
 213         return NT_STATUS_OK;
 214 }
 215
 216 /****************************************************************************
 217  Do a NT1 plaintext session setup.
 218 ****************************************************************************/
 219
 220 static NTSTATUS cli_session_setup_plaintext(struct cli_state *cli,
 221                                             const char *user, const char *pass,
 222                                             const char *workgroup)
 223 {
 224         uint32 capabilities = cli_session_setup_capabilities(cli);
 225         char *p;
 226         fstring lanman;
 227
 228         fstr_sprintf( lanman, "Samba %s", SAMBA_VERSION_STRING);
 229
 230         memset(cli->outbuf, '\0', smb_size);
 231         cli_set_message(cli->outbuf,13,0,True);
 232         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 233         cli_setup_packet(cli);
 234
 235         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 236         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 237         SSVAL(cli->outbuf,smb_vwv3,2);
 238         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 239         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 240         SSVAL(cli->outbuf,smb_vwv8,0);
 241         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 242         p = smb_buf(cli->outbuf);
 243
 244         /* check wether to send the ASCII or UNICODE version of the password */
 245
 246         if ( (capabilities & CAP_UNICODE) == 0 ) {
 247                 p += clistr_push(cli, p, pass, -1, STR_TERMINATE); /* password */
 248                 SSVAL(cli->outbuf,smb_vwv7,PTR_DIFF(p, smb_buf(cli->outbuf)));
 249         }
 250         else {
 251                 /* For ucs2 passwords clistr_push calls ucs2_align, which causes
 252                  * the space taken by the unicode password to be one byte too
 253                  * long (as we're on an odd byte boundary here). Reduce the
 254                  * count by 1 to cope with this. Fixes smbclient against NetApp
 255                  * servers which can't cope. Fix from
 256                  * bryan.kolodziej@allenlund.com in bug #3840.
 257                  */
 258                 p += clistr_push(cli, p, pass, -1, STR_UNICODE|STR_TERMINATE); /* unicode password */
 259                 SSVAL(cli->outbuf,smb_vwv8,PTR_DIFF(p, smb_buf(cli->outbuf))-1);
 260         }
 261
 262         p += clistr_push(cli, p, user, -1, STR_TERMINATE); /* username */
 263         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE); /* workgroup */
 264         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 265         p += clistr_push(cli, p, lanman, -1, STR_TERMINATE);
 266         cli_setup_bcc(cli, p);
 267
 268         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 269                 return cli_nt_error(cli);
 270         }
 271
 272         show_msg(cli->inbuf);
 273
 274         if (cli_is_error(cli)) {
 275                 return cli_nt_error(cli);
 276         }
 277
 278         cli->vuid = SVAL(cli->inbuf,smb_uid);
 279         p = smb_buf(cli->inbuf);
 280         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 281         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 282         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 283         fstrcpy(cli->user_name, user);
 284
 285         if (strstr(cli->server_type, "Samba")) {
 286                 cli->is_samba = True;
 287         }
 288
 289         return NT_STATUS_OK;
 290 }
 291
 292 /****************************************************************************
 293    do a NT1 NTLM/LM encrypted session setup - for when extended security
 294    is not negotiated.
 295    @param cli client state to create do session setup on
 296    @param user username
 297    @param pass *either* cleartext password (passlen !=24) or LM response.
 298    @param ntpass NT response, implies ntpasslen >=24, implies pass is not clear
 299    @param workgroup The user's domain.
 300 ****************************************************************************/
 301
 302 static NTSTATUS cli_session_setup_nt1(struct cli_state *cli, const char *user,
 303                                       const char *pass, size_t passlen,
 304                                       const char *ntpass, size_t ntpasslen,
 305                                       const char *workgroup)
 306 {
 307         uint32 capabilities = cli_session_setup_capabilities(cli);
 308         DATA_BLOB lm_response = data_blob_null;
 309         DATA_BLOB nt_response = data_blob_null;
 310         DATA_BLOB session_key = data_blob_null;
 311         NTSTATUS result;
 312         char *p;
 313
 314         if (passlen == 0) {
 315                 /* do nothing - guest login */
 316         } else if (passlen != 24) {
 317                 if (lp_client_ntlmv2_auth()) {
 318                         DATA_BLOB server_chal;
 319                         DATA_BLOB names_blob;
 320                         server_chal = data_blob(cli->secblob.data, MIN(cli->secblob.length, 8));
 321
 322                         /* note that the 'workgroup' here is a best guess - we don't know
 323                            the server's domain at this point.  The 'server name' is also
 324                            dodgy...
 325                         */
 326                         names_blob = NTLMv2_generate_names_blob(cli->called.name, workgroup);
 327
 328                         if (!SMBNTLMv2encrypt(user, workgroup, pass, &server_chal,
 329                                               &names_blob,
 330                                               &lm_response, &nt_response, &session_key)) {
 331                                 data_blob_free(&names_blob);
 332                                 data_blob_free(&server_chal);
 333                                 return NT_STATUS_ACCESS_DENIED;
 334                         }
 335                         data_blob_free(&names_blob);
 336                         data_blob_free(&server_chal);
 337
 338                 } else {
 339                         uchar nt_hash[16];
 340                         E_md4hash(pass, nt_hash);
 341
 342 #ifdef LANMAN_ONLY
 343                         nt_response = data_blob_null;
 344 #else
 345                         nt_response = data_blob(NULL, 24);
 346                         SMBNTencrypt(pass,cli->secblob.data,nt_response.data);
 347 #endif
 348                         /* non encrypted password supplied. Ignore ntpass. */
 349                         if (lp_client_lanman_auth()) {
 350                                 lm_response = data_blob(NULL, 24);
 351                                 if (!SMBencrypt(pass,cli->secblob.data, lm_response.data)) {
 352                                         /* Oops, the LM response is invalid, just put
 353                                            the NT response there instead */
 354                                         data_blob_free(&lm_response);
 355                                         lm_response = data_blob(nt_response.data, nt_response.length);
 356                                 }
 357                         } else {
 358                                 /* LM disabled, place NT# in LM field instead */
 359                                 lm_response = data_blob(nt_response.data, nt_response.length);
 360                         }
 361
 362                         session_key = data_blob(NULL, 16);
 363 #ifdef LANMAN_ONLY
 364                         E_deshash(pass, session_key.data);
 365                         memset(&session_key.data[8], '\0', 8);
 366 #else
 367                         SMBsesskeygen_ntv1(nt_hash, NULL, session_key.data);
 368 #endif
 369                 }
 370 #ifdef LANMAN_ONLY
 371                 cli_simple_set_signing(cli, session_key, lm_response);
 372 #else
 373                 cli_simple_set_signing(cli, session_key, nt_response);
 374 #endif
 375         } else {
 376                 /* pre-encrypted password supplied.  Only used for
 377                    security=server, can't do
 378                    signing because we don't have original key */
 379
 380                 lm_response = data_blob(pass, passlen);
 381                 nt_response = data_blob(ntpass, ntpasslen);
 382         }
 383
 384         /* send a session setup command */
 385         memset(cli->outbuf,'\0',smb_size);
 386
 387         cli_set_message(cli->outbuf,13,0,True);
 388         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 389         cli_setup_packet(cli);
 390
 391         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 392         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 393         SSVAL(cli->outbuf,smb_vwv3,2);
 394         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 395         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 396         SSVAL(cli->outbuf,smb_vwv7,lm_response.length);
 397         SSVAL(cli->outbuf,smb_vwv8,nt_response.length);
 398         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 399         p = smb_buf(cli->outbuf);
 400         if (lm_response.length) {
 401                 memcpy(p,lm_response.data, lm_response.length); p += lm_response.length;
 402         }
 403         if (nt_response.length) {
 404                 memcpy(p,nt_response.data, nt_response.length); p += nt_response.length;
 405         }
 406         p += clistr_push(cli, p, user, -1, STR_TERMINATE);
 407
 408         /* Upper case here might help some NTLMv2 implementations */
 409         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE|STR_UPPER);
 410         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 411         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 412         cli_setup_bcc(cli, p);
 413
 414         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 415                 result = cli_nt_error(cli);
 416                 goto end;
 417         }
 418
 419         /* show_msg(cli->inbuf); */
 420
 421         if (cli_is_error(cli)) {
 422                 result = cli_nt_error(cli);
 423                 goto end;
 424         }
 425
 426         /* use the returned vuid from now on */
 427         cli->vuid = SVAL(cli->inbuf,smb_uid);
 428
 429         p = smb_buf(cli->inbuf);
 430         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 431         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 432         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 433
 434         if (strstr(cli->server_type, "Samba")) {
 435                 cli->is_samba = True;
 436         }
 437
 438         fstrcpy(cli->user_name, user);
 439
 440         if (session_key.data) {
 441                 /* Have plaintext orginal */
 442                 cli_set_session_key(cli, session_key);
 443         }
 444
 445         result = NT_STATUS_OK;
 446 end:
 447         data_blob_free(&lm_response);
 448         data_blob_free(&nt_response);
 449         data_blob_free(&session_key);
 450         return result;
 451 }
 452
 453 /****************************************************************************
 454  Send a extended security session setup blob
 455 ****************************************************************************/
 456
 457 static bool cli_session_setup_blob_send(struct cli_state *cli, DATA_BLOB blob)
 458 {
 459         uint32 capabilities = cli_session_setup_capabilities(cli);
 460         char *p;
 461
 462         capabilities |= CAP_EXTENDED_SECURITY;
 463
 464         /* send a session setup command */
 465         memset(cli->outbuf,'\0',smb_size);
 466
 467         cli_set_message(cli->outbuf,12,0,True);
 468         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 469
 470         cli_setup_packet(cli);
 471
 472         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 473         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 474         SSVAL(cli->outbuf,smb_vwv3,2);
 475         SSVAL(cli->outbuf,smb_vwv4,1);
 476         SIVAL(cli->outbuf,smb_vwv5,0);
 477         SSVAL(cli->outbuf,smb_vwv7,blob.length);
 478         SIVAL(cli->outbuf,smb_vwv10,capabilities);
 479         p = smb_buf(cli->outbuf);
 480         memcpy(p, blob.data, blob.length);
 481         p += blob.length;
 482         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 483         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 484         cli_setup_bcc(cli, p);
 485         return cli_send_smb(cli);
 486 }
 487
 488 /****************************************************************************
 489  Send a extended security session setup blob, returning a reply blob.
 490 ****************************************************************************/
 491
 492 static DATA_BLOB cli_session_setup_blob_receive(struct cli_state *cli)
 493 {
 494         DATA_BLOB blob2 = data_blob_null;
 495         char *p;
 496         size_t len;
 497
 498         if (!cli_receive_smb(cli))
 499                 return blob2;
 500
 501         show_msg(cli->inbuf);
 502
 503         if (cli_is_error(cli) && !NT_STATUS_EQUAL(cli_nt_error(cli),
 504                                                   NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 505                 return blob2;
 506         }
 507
 508         /* use the returned vuid from now on */
 509         cli->vuid = SVAL(cli->inbuf,smb_uid);
 510
 511         p = smb_buf(cli->inbuf);
 512
 513         blob2 = data_blob(p, SVAL(cli->inbuf, smb_vwv3));
 514
 515         p += blob2.length;
 516         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 517
 518         /* w2k with kerberos doesn't properly null terminate this field */
 519         len = smb_bufrem(cli->inbuf, p);
 520         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), len, 0);
 521
 522         return blob2;
 523 }
 524
 525 #ifdef HAVE_KRB5
 526 /****************************************************************************
 527  Send a extended security session setup blob, returning a reply blob.
 528 ****************************************************************************/
 529
 530 /* The following is calculated from :
 531  * (smb_size-4) = 35
 532  * (smb_wcnt * 2) = 24 (smb_wcnt == 12 in cli_session_setup_blob_send() )
 533  * (strlen("Unix") + 1 + strlen("Samba") + 1) * 2 = 22 (unicode strings at
 534  * end of packet.
 535  */
 536
 537 #define BASE_SESSSETUP_BLOB_PACKET_SIZE (35 + 24 + 22)
 538
 539 static bool cli_session_setup_blob(struct cli_state *cli, DATA_BLOB blob, DATA_BLOB session_key_krb5)
 540 {
 541         int32 remaining = blob.length;
 542         int32 cur = 0;
 543         DATA_BLOB send_blob = data_blob_null;
 544         int32 max_blob_size = 0;
 545         DATA_BLOB receive_blob = data_blob_null;
 546
 547         if (cli->max_xmit < BASE_SESSSETUP_BLOB_PACKET_SIZE + 1) {
 548                 DEBUG(0,("cli_session_setup_blob: cli->max_xmit too small "
 549                         "(was %u, need minimum %u)\n",
 550                         (unsigned int)cli->max_xmit,
 551                         BASE_SESSSETUP_BLOB_PACKET_SIZE));
 552                 cli_set_nt_error(cli, NT_STATUS_INVALID_PARAMETER);
 553                 return False;
 554         }
 555
 556         max_blob_size = cli->max_xmit - BASE_SESSSETUP_BLOB_PACKET_SIZE;
 557
 558         while ( remaining > 0) {
 559                 if (remaining >= max_blob_size) {
 560                         send_blob.length = max_blob_size;
 561                         remaining -= max_blob_size;
 562                 } else {
 563                         DATA_BLOB null_blob = data_blob_null;
 564
 565                         send_blob.length = remaining;
 566                         remaining = 0;
 567
 568                         /* This is the last packet in the sequence - turn signing on. */
 569                         cli_simple_set_signing(cli, session_key_krb5, null_blob);
 570                 }
 571
 572                 send_blob.data =  &blob.data[cur];
 573                 cur += send_blob.length;
 574
 575                 DEBUG(10, ("cli_session_setup_blob: Remaining (%u) sending (%u) current (%u)\n",
 576                         (unsigned int)remaining,
 577                         (unsigned int)send_blob.length,
 578                         (unsigned int)cur ));
 579
 580                 if (!cli_session_setup_blob_send(cli, send_blob)) {
 581                         DEBUG(0, ("cli_session_setup_blob: send failed\n"));
 582                         return False;
 583                 }
 584
 585                 receive_blob = cli_session_setup_blob_receive(cli);
 586                 data_blob_free(&receive_blob);
 587
 588                 if (cli_is_error(cli) &&
 589                                 !NT_STATUS_EQUAL( cli_get_nt_error(cli),
 590                                         NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 591                         DEBUG(0, ("cli_session_setup_blob: receive failed "
 592                                   "(%s)\n", nt_errstr(cli_get_nt_error(cli))));
 593                         cli->vuid = 0;
 594                         return False;
 595                 }
 596         }
 597
 598         return True;
 599 }
 600
 601 /****************************************************************************
 602  Use in-memory credentials cache
 603 ****************************************************************************/
 604
 605 static void use_in_memory_ccache(void) {
 606         setenv(KRB5_ENV_CCNAME, "MEMORY:cliconnect", 1);
 607 }
 608
 609 /****************************************************************************
 610  Do a spnego/kerberos encrypted session setup.
 611 ****************************************************************************/
 612
 613 static ADS_STATUS cli_session_setup_kerberos(struct cli_state *cli, const char *principal, const char *workgroup)
 614 {
 615         DATA_BLOB negTokenTarg;
 616         DATA_BLOB session_key_krb5;
 617         int rc;
 618
 619         DEBUG(2,("Doing kerberos session setup\n"));
 620
 621         /* generate the encapsulated kerberos5 ticket */
 622         rc = spnego_gen_negTokenTarg(principal, 0, &negTokenTarg, &session_key_krb5, 0, NULL);
 623
 624         if (rc) {
 625                 DEBUG(1, ("cli_session_setup_kerberos: spnego_gen_negTokenTarg failed: %s\n",
 626                         error_message(rc)));
 627                 return ADS_ERROR_KRB5(rc);
 628         }
 629
 630 #if 0
 631         file_save("negTokenTarg.dat", negTokenTarg.data, negTokenTarg.length);
 632 #endif
 633
 634         if (!cli_session_setup_blob(cli, negTokenTarg, session_key_krb5)) {
 635                 data_blob_free(&negTokenTarg);
 636                 data_blob_free(&session_key_krb5);
 637                 return ADS_ERROR_NT(cli_nt_error(cli));
 638         }
 639
 640         cli_set_session_key(cli, session_key_krb5);
 641
 642         data_blob_free(&negTokenTarg);
 643         data_blob_free(&session_key_krb5);
 644
 645         if (cli_is_error(cli)) {
 646                 if (NT_STATUS_IS_OK(cli_nt_error(cli))) {
 647                         return ADS_ERROR_NT(NT_STATUS_UNSUCCESSFUL);
 648                 }
 649         }
 650         return ADS_ERROR_NT(cli_nt_error(cli));
 651 }
 652 #endif  /* HAVE_KRB5 */
 653
 654
 655 /****************************************************************************
 656  Do a spnego/NTLMSSP encrypted session setup.
 657 ****************************************************************************/
 658
 659 static NTSTATUS cli_session_setup_ntlmssp(struct cli_state *cli, const char *user,
 660                                           const char *pass, const char *domain)
 661 {
 662         struct ntlmssp_state *ntlmssp_state;
 663         NTSTATUS nt_status;
 664         int turn = 1;
 665         DATA_BLOB msg1;
 666         DATA_BLOB blob = data_blob_null;
 667         DATA_BLOB blob_in = data_blob_null;
 668         DATA_BLOB blob_out = data_blob_null;
 669
 670         cli_temp_set_signing(cli);
 671
 672         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_client_start(&ntlmssp_state))) {
 673                 return nt_status;
 674         }
 675         ntlmssp_want_feature(ntlmssp_state, NTLMSSP_FEATURE_SESSION_KEY);
 676
 677         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(ntlmssp_state, user))) {
 678                 return nt_status;
 679         }
 680         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(ntlmssp_state, domain))) {
 681                 return nt_status;
 682         }
 683         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_password(ntlmssp_state, pass))) {
 684                 return nt_status;
 685         }
 686
 687         do {
 688                 nt_status = ntlmssp_update(ntlmssp_state,
 689                                                   blob_in, &blob_out);
 690                 data_blob_free(&blob_in);
 691                 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED) || NT_STATUS_IS_OK(nt_status)) {
 692                         if (turn == 1) {
 693                                 /* and wrap it in a SPNEGO wrapper */
 694                                 msg1 = gen_negTokenInit(OID_NTLMSSP, blob_out);
 695                         } else {
 696                                 /* wrap it in SPNEGO */
 697                                 msg1 = spnego_gen_auth(blob_out);
 698                         }
 699
 700                         /* now send that blob on its way */
 701                         if (!cli_session_setup_blob_send(cli, msg1)) {
 702                                 DEBUG(3, ("Failed to send NTLMSSP/SPNEGO blob to server!\n"));
 703                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 704                         } else {
 705                                 blob = cli_session_setup_blob_receive(cli);
 706
 707                                 nt_status = cli_nt_error(cli);
 708                                 if (cli_is_error(cli) && NT_STATUS_IS_OK(nt_status)) {
 709                                         if (cli->smb_rw_error == SMB_READ_BAD_SIG) {
 710                                                 nt_status = NT_STATUS_ACCESS_DENIED;
 711                                         } else {
 712                                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 713                                         }
 714                                 }
 715                         }
 716                         data_blob_free(&msg1);
 717                 }
 718
 719                 if (!blob.length) {
 720                         if (NT_STATUS_IS_OK(nt_status)) {
 721                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 722                         }
 723                 } else if ((turn == 1) &&
 724                            NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 725                         DATA_BLOB tmp_blob = data_blob_null;
 726                         /* the server might give us back two challenges */
 727                         if (!spnego_parse_challenge(blob, &blob_in,
 728                                                     &tmp_blob)) {
 729                                 DEBUG(3,("Failed to parse challenges\n"));
 730                                 nt_status = NT_STATUS_INVALID_PARAMETER;
 731                         }
 732                         data_blob_free(&tmp_blob);
 733                 } else {
 734                         if (!spnego_parse_auth_response(blob, nt_status, OID_NTLMSSP,
 735                                                         &blob_in)) {
 736                                 DEBUG(3,("Failed to parse auth response\n"));
 737                                 if (NT_STATUS_IS_OK(nt_status)
 738                                     || NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED))
 739                                         nt_status = NT_STATUS_INVALID_PARAMETER;
 740                         }
 741                 }
 742                 data_blob_free(&blob);
 743                 data_blob_free(&blob_out);
 744                 turn++;
 745         } while (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED));
 746
 747         data_blob_free(&blob_in);
 748
 749         if (NT_STATUS_IS_OK(nt_status)) {
 750
 751                 DATA_BLOB key = data_blob(ntlmssp_state->session_key.data,
 752                                           ntlmssp_state->session_key.length);
 753                 DATA_BLOB null_blob = data_blob_null;
 754                 bool res;
 755
 756                 fstrcpy(cli->server_domain, ntlmssp_state->server_domain);
 757                 cli_set_session_key(cli, ntlmssp_state->session_key);
 758
 759                 res = cli_simple_set_signing(cli, key, null_blob);
 760
 761                 data_blob_free(&key);
 762
 763                 if (res) {
 764
 765                         /* 'resign' the last message, so we get the right sequence numbers
 766                            for checking the first reply from the server */
 767                         cli_calculate_sign_mac(cli, cli->outbuf);
 768
 769                         if (!cli_check_sign_mac(cli, cli->inbuf)) {
 770                                 nt_status = NT_STATUS_ACCESS_DENIED;
 771                         }
 772                 }
 773         }
 774
 775         /* we have a reference conter on ntlmssp_state, if we are signing
 776            then the state will be kept by the signing engine */
 777
 778         ntlmssp_end(&ntlmssp_state);
 779
 780         if (!NT_STATUS_IS_OK(nt_status)) {
 781                 cli->vuid = 0;
 782         }
 783         return nt_status;
 784 }
 785
 786 /****************************************************************************
 787  Do a spnego encrypted session setup.
 788
 789  user_domain: The shortname of the domain the user/machine is a member of.
 790  dest_realm: The realm we're connecting to, if NULL we use our default realm.
 791 ****************************************************************************/
 792
 793 ADS_STATUS cli_session_setup_spnego(struct cli_state *cli, const char *user,
 794                               const char *pass, const char *user_domain,
 795                               const char * dest_realm)
 796 {
 797         char *principal = NULL;
 798         char *OIDs[ASN1_MAX_OIDS];
 799         int i;
 800         DATA_BLOB blob;
 801         const char *p = NULL;
 802         char *account = NULL;
 803
 804         DEBUG(3,("Doing spnego session setup (blob length=%lu)\n", (unsigned long)cli->secblob.length));
 805
 806         /* the server might not even do spnego */
 807         if (cli->secblob.length <= 16) {
 808                 DEBUG(3,("server didn't supply a full spnego negprot\n"));
 809                 goto ntlmssp;
 810         }
 811
 812 #if 0
 813         file_save("negprot.dat", cli->secblob.data, cli->secblob.length);
 814 #endif
 815
 816         /* there is 16 bytes of GUID before the real spnego packet starts */
 817         blob = data_blob(cli->secblob.data+16, cli->secblob.length-16);
 818
 819         /* The server sent us the first part of the SPNEGO exchange in the
 820          * negprot reply. It is WRONG to depend on the principal sent in the
 821          * negprot reply, but right now we do it. If we don't receive one,
 822          * we try to best guess, then fall back to NTLM.  */
 823         if (!spnego_parse_negTokenInit(blob, OIDs, &principal)) {
 824                 data_blob_free(&blob);
 825                 return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 826         }
 827         data_blob_free(&blob);
 828
 829         /* make sure the server understands kerberos */
 830         for (i=0;OIDs[i];i++) {
 831                 DEBUG(3,("got OID=%s\n", OIDs[i]));
 832                 if (strcmp(OIDs[i], OID_KERBEROS5_OLD) == 0 ||
 833                     strcmp(OIDs[i], OID_KERBEROS5) == 0) {
 834                         cli->got_kerberos_mechanism = True;
 835                 }
 836                 talloc_free(OIDs[i]);
 837         }
 838
 839         DEBUG(3,("got principal=%s\n", principal ? principal : "<null>"));
 840
 841         fstrcpy(cli->user_name, user);
 842
 843 #ifdef HAVE_KRB5
 844         /* If password is set we reauthenticate to kerberos server
 845          * and do not store results */
 846
 847         if (cli->got_kerberos_mechanism && cli->use_kerberos) {
 848                 ADS_STATUS rc;
 849
 850                 if (pass && *pass) {
 851                         int ret;
 852
 853                         use_in_memory_ccache();
 854                         ret = kerberos_kinit_password(user, pass, 0 /* no time correction for now */, NULL);
 855
 856                         if (ret){
 857                                 TALLOC_FREE(principal);
 858                                 DEBUG(0, ("Kinit failed: %s\n", error_message(ret)));
 859                                 if (cli->fallback_after_kerberos)
 860                                         goto ntlmssp;
 861                                 return ADS_ERROR_KRB5(ret);
 862                         }
 863                 }
 864
 865                 /* If we get a bad principal, try to guess it if
 866                    we have a valid host NetBIOS name.
 867                  */
 868                 if (strequal(principal, ADS_IGNORE_PRINCIPAL)) {
 869                         TALLOC_FREE(principal);
 870                 }
 871
 872                 if (principal == NULL &&
 873                         !is_ipaddress(cli->desthost) &&
 874                         !strequal(star_smbserver_name,
 875                                 cli->desthost)) {
 876                         char *realm = NULL;
 877                         char *machine = NULL;
 878                         char *host = NULL;
 879                         DEBUG(3,("cli_session_setup_spnego: got a "
 880                                 "bad server principal, trying to guess ...\n"));
 881
 882                         host = strchr_m(cli->desthost, '.');
 883                         if (host) {
 884                                 machine = SMB_STRNDUP(cli->desthost,
 885                                         host - cli->desthost);
 886                         } else {
 887                                 machine = SMB_STRDUP(cli->desthost);
 888                         }
 889                         if (machine == NULL) {
 890                                 return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
 891                         }
 892
 893                         if (dest_realm) {
 894                                 realm = SMB_STRDUP(dest_realm);
 895                                 strupper_m(realm);
 896                         } else {
 897                                 realm = kerberos_get_default_realm_from_ccache();
 898                         }
 899                         if (realm && *realm) {
 900                                 principal = talloc_asprintf(NULL, "%s$@%s",
 901                                                         machine, realm);
 902                                 if (!principal) {
 903                                         SAFE_FREE(machine);
 904                                         SAFE_FREE(realm);
 905                                         return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
 906                                 }
 907                                 DEBUG(3,("cli_session_setup_spnego: guessed "
 908                                         "server principal=%s\n",
 909                                         principal ? principal : "<null>"));
 910                         }
 911                         SAFE_FREE(machine);
 912                         SAFE_FREE(realm);
 913                 }
 914
 915                 if (principal) {
 916                         rc = cli_session_setup_kerberos(cli, principal,
 917                                 dest_realm);
 918                         if (ADS_ERR_OK(rc) || !cli->fallback_after_kerberos) {
 919                                 TALLOC_FREE(principal);
 920                                 return rc;
 921                         }
 922                 }
 923         }
 924 #endif
 925
 926         TALLOC_FREE(principal);
 927
 928 ntlmssp:
 929
 930         account = talloc_strdup(talloc_tos(), user);
 931         if (!account) {
 932                 return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
 933         }
 934
 935         /* when falling back to ntlmssp while authenticating with a machine
 936          * account strip off the realm - gd */
 937
 938         if ((p = strchr_m(user, '@')) != NULL) {
 939                 account[PTR_DIFF(p,user)] = '\0';
 940         }
 941
 942         return ADS_ERROR_NT(cli_session_setup_ntlmssp(cli, account, pass, user_domain));
 943 }
 944
 945 /****************************************************************************
 946  Send a session setup. The username and workgroup is in UNIX character
 947  format and must be converted to DOS codepage format before sending. If the
 948  password is in plaintext, the same should be done.
 949 ****************************************************************************/
 950
 951 NTSTATUS cli_session_setup(struct cli_state *cli,
 952                            const char *user,
 953                            const char *pass, int passlen,
 954                            const char *ntpass, int ntpasslen,
 955                            const char *workgroup)
 956 {
 957         char *p;
 958         fstring user2;
 959
 960         if (user) {
 961                 fstrcpy(user2, user);
 962         } else {
 963                 user2[0] ='\0';
 964         }
 965
 966         if (!workgroup) {
 967                 workgroup = "";
 968         }
 969
 970         /* allow for workgroups as part of the username */
 971         if ((p=strchr_m(user2,'\\')) || (p=strchr_m(user2,'/')) ||
 972             (p=strchr_m(user2,*lp_winbind_separator()))) {
 973                 *p = 0;
 974                 user = p+1;
 975                 workgroup = user2;
 976         }
 977
 978         if (cli->protocol < PROTOCOL_LANMAN1) {
 979                 return NT_STATUS_OK;
 980         }
 981
 982         /* now work out what sort of session setup we are going to
 983            do. I have split this into separate functions to make the
 984            flow a bit easier to understand (tridge) */
 985
 986         /* if its an older server then we have to use the older request format */
 987
 988         if (cli->protocol < PROTOCOL_NT1) {
 989                 if (!lp_client_lanman_auth() && passlen != 24 && (*pass)) {
 990                         DEBUG(1, ("Server requested LM password but 'client lanman auth'"
 991                                   " is disabled\n"));
 992                         return NT_STATUS_ACCESS_DENIED;
 993                 }
 994
 995                 if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0 &&
 996                     !lp_client_plaintext_auth() && (*pass)) {
 997                         DEBUG(1, ("Server requested plaintext password but "
 998                                   "'client plaintext auth' is disabled\n"));
 999                         return NT_STATUS_ACCESS_DENIED;
1000                 }
1001
1002                 return cli_session_setup_lanman2(cli, user, pass, passlen,
1003                                                  workgroup);
1004         }
1005
1006         /* if no user is supplied then we have to do an anonymous connection.
1007            passwords are ignored */
1008
1009         if (!user || !*user)
1010                 return cli_session_setup_guest(cli);
1011
1012         /* if the server is share level then send a plaintext null
1013            password at this point. The password is sent in the tree
1014            connect */
1015
1016         if ((cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) == 0)
1017                 return cli_session_setup_plaintext(cli, user, "", workgroup);
1018
1019         /* if the server doesn't support encryption then we have to use
1020            plaintext. The second password is ignored */
1021
1022         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0) {
1023                 if (!lp_client_plaintext_auth() && (*pass)) {
1024                         DEBUG(1, ("Server requested plaintext password but "
1025                                   "'client plaintext auth' is disabled\n"));
1026                         return NT_STATUS_ACCESS_DENIED;
1027                 }
1028                 return cli_session_setup_plaintext(cli, user, pass, workgroup);
1029         }
1030
1031         /* if the server supports extended security then use SPNEGO */
1032
1033         if (cli->capabilities & CAP_EXTENDED_SECURITY) {
1034                 ADS_STATUS status = cli_session_setup_spnego(cli, user, pass,
1035                                                              workgroup, NULL);
1036                 if (!ADS_ERR_OK(status)) {
1037                         DEBUG(3, ("SPNEGO login failed: %s\n", ads_errstr(status)));
1038                         return ads_ntstatus(status);
1039                 }
1040         } else {
1041                 NTSTATUS status;
1042
1043                 /* otherwise do a NT1 style session setup */
1044                 status = cli_session_setup_nt1(cli, user, pass, passlen,
1045                                                ntpass, ntpasslen, workgroup);
1046                 if (!NT_STATUS_IS_OK(status)) {
1047                         DEBUG(3,("cli_session_setup: NT1 session setup "
1048                                  "failed: %s\n", nt_errstr(status)));
1049                         return status;
1050                 }
1051         }
1052
1053         if (strstr(cli->server_type, "Samba")) {
1054                 cli->is_samba = True;
1055         }
1056
1057         return NT_STATUS_OK;
1058 }
1059
1060 /****************************************************************************
1061  Send a uloggoff.
1062 *****************************************************************************/
1063
1064 bool cli_ulogoff(struct cli_state *cli)
1065 {
1066         memset(cli->outbuf,'\0',smb_size);
1067         cli_set_message(cli->outbuf,2,0,True);
1068         SCVAL(cli->outbuf,smb_com,SMBulogoffX);
1069         cli_setup_packet(cli);
1070         SSVAL(cli->outbuf,smb_vwv0,0xFF);
1071         SSVAL(cli->outbuf,smb_vwv2,0);  /* no additional info */
1072
1073         cli_send_smb(cli);
1074         if (!cli_receive_smb(cli))
1075                 return False;
1076
1077         if (cli_is_error(cli)) {
1078                 return False;
1079         }
1080
1081         cli->cnum = -1;
1082         return True;
1083 }
1084
1085 /****************************************************************************
1086  Send a tconX.
1087 ****************************************************************************/
1088
1089 bool cli_send_tconX(struct cli_state *cli,
1090                     const char *share, const char *dev, const char *pass, int passlen)
1091 {
1092         fstring fullshare, pword;
1093         char *p;
1094         memset(cli->outbuf,'\0',smb_size);
1095         memset(cli->inbuf,'\0',smb_size);
1096
1097         fstrcpy(cli->share, share);
1098
1099         /* in user level security don't send a password now */
1100         if (cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) {
1101                 passlen = 1;
1102                 pass = "";
1103         } else if (!pass) {
1104                 DEBUG(1, ("Server not using user level security and no password supplied.\n"));
1105                 return False;
1106         }
1107
1108         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) &&
1109             *pass && passlen != 24) {
1110                 if (!lp_client_lanman_auth()) {
1111                         DEBUG(1, ("Server requested LANMAN password "
1112                                   "(share-level security) but "
1113                                   "'client lanman auth' is disabled\n"));
1114                         return False;
1115                 }
1116
1117                 /*
1118                  * Non-encrypted passwords - convert to DOS codepage before encryption.
1119                  */
1120                 passlen = 24;
1121                 SMBencrypt(pass,cli->secblob.data,(uchar *)pword);
1122         } else {
1123                 if((cli->sec_mode & (NEGOTIATE_SECURITY_USER_LEVEL|NEGOTIATE_SECURITY_CHALLENGE_RESPONSE)) == 0) {
1124                         if (!lp_client_plaintext_auth() && (*pass)) {
1125                                 DEBUG(1, ("Server requested plaintext "
1126                                           "password but 'client plaintext "
1127                                           "auth' is disabled\n"));
1128                                 return False;
1129                         }
1130
1131                         /*
1132                          * Non-encrypted passwords - convert to DOS codepage before using.
1133                          */
1134                         passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
1135
1136                 } else {
1137                         if (passlen) {
1138                                 memcpy(pword, pass, passlen);
1139                         }
1140                 }
1141         }
1142
1143         slprintf(fullshare, sizeof(fullshare)-1,
1144                  "\\\\%s\\%s", cli->desthost, share);
1145
1146         cli_set_message(cli->outbuf,4, 0, True);
1147         SCVAL(cli->outbuf,smb_com,SMBtconX);
1148         cli_setup_packet(cli);
1149
1150         SSVAL(cli->outbuf,smb_vwv0,0xFF);
1151         SSVAL(cli->outbuf,smb_vwv2,TCONX_FLAG_EXTENDED_RESPONSE);
1152         SSVAL(cli->outbuf,smb_vwv3,passlen);
1153
1154         p = smb_buf(cli->outbuf);
1155         if (passlen) {
1156                 memcpy(p,pword,passlen);
1157         }
1158         p += passlen;
1159         p += clistr_push(cli, p, fullshare, -1, STR_TERMINATE |STR_UPPER);
1160         p += clistr_push(cli, p, dev, -1, STR_TERMINATE |STR_UPPER | STR_ASCII);
1161
1162         cli_setup_bcc(cli, p);
1163
1164         cli_send_smb(cli);
1165         if (!cli_receive_smb(cli))
1166                 return False;
1167
1168         if (cli_is_error(cli))
1169                 return False;
1170
1171         clistr_pull(cli, cli->dev, smb_buf(cli->inbuf), sizeof(fstring), -1, STR_TERMINATE|STR_ASCII);
1172
1173         if (cli->protocol >= PROTOCOL_NT1 &&
1174             smb_buflen(cli->inbuf) == 3) {
1175                 /* almost certainly win95 - enable bug fixes */
1176                 cli->win95 = True;
1177         }
1178
1179         /* Make sure that we have the optional support 16-bit field.  WCT > 2 */
1180         /* Avoids issues when connecting to Win9x boxes sharing files */
1181
1182         cli->dfsroot = False;
1183         if ( (CVAL(cli->inbuf, smb_wct))>2 && cli->protocol >= PROTOCOL_LANMAN2 )
1184                 cli->dfsroot = (SVAL( cli->inbuf, smb_vwv2 ) & SMB_SHARE_IN_DFS) ? True : False;
1185
1186         cli->cnum = SVAL(cli->inbuf,smb_tid);
1187         return True;
1188 }
1189
1190 /****************************************************************************
1191  Send a tree disconnect.
1192 ****************************************************************************/
1193
1194 bool cli_tdis(struct cli_state *cli)
1195 {
1196         memset(cli->outbuf,'\0',smb_size);
1197         cli_set_message(cli->outbuf,0,0,True);
1198         SCVAL(cli->outbuf,smb_com,SMBtdis);
1199         SSVAL(cli->outbuf,smb_tid,cli->cnum);
1200         cli_setup_packet(cli);
1201
1202         cli_send_smb(cli);
1203         if (!cli_receive_smb(cli))
1204                 return False;
1205
1206         if (cli_is_error(cli)) {
1207                 return False;
1208         }
1209
1210         cli->cnum = -1;
1211         return True;
1212 }
1213
1214 /****************************************************************************
1215  Send a negprot command.
1216 ****************************************************************************/
1217
1218 void cli_negprot_send(struct cli_state *cli)
1219 {
1220         char *p;
1221         int numprots;
1222
1223         if (cli->protocol < PROTOCOL_NT1)
1224                 cli->use_spnego = False;
1225
1226         memset(cli->outbuf,'\0',smb_size);
1227
1228         /* setup the protocol strings */
1229         cli_set_message(cli->outbuf,0,0,True);
1230
1231         p = smb_buf(cli->outbuf);
1232         for (numprots=0;
1233              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1234              numprots++) {
1235                 *p++ = 2;
1236                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1237         }
1238
1239         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1240         cli_setup_bcc(cli, p);
1241         cli_setup_packet(cli);
1242
1243         SCVAL(smb_buf(cli->outbuf),0,2);
1244
1245         cli_send_smb(cli);
1246 }
1247
1248 /****************************************************************************
1249  Send a negprot command.
1250 ****************************************************************************/
1251
1252 bool cli_negprot(struct cli_state *cli)
1253 {
1254         char *p;
1255         int numprots;
1256         int plength;
1257
1258         if (cli->protocol < PROTOCOL_NT1)
1259                 cli->use_spnego = False;
1260
1261         memset(cli->outbuf,'\0',smb_size);
1262
1263         /* setup the protocol strings */
1264         for (plength=0,numprots=0;
1265              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1266              numprots++)
1267                 plength += strlen(prots[numprots].name)+2;
1268
1269         cli_set_message(cli->outbuf,0,plength,True);
1270
1271         p = smb_buf(cli->outbuf);
1272         for (numprots=0;
1273              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1274              numprots++) {
1275                 *p++ = 2;
1276                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1277         }
1278
1279         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1280         cli_setup_packet(cli);
1281
1282         SCVAL(smb_buf(cli->outbuf),0,2);
1283
1284         cli_send_smb(cli);
1285         if (!cli_receive_smb(cli))
1286                 return False;
1287
1288         show_msg(cli->inbuf);
1289
1290         if (cli_is_error(cli) ||
1291             ((int)SVAL(cli->inbuf,smb_vwv0) >= numprots)) {
1292                 return(False);
1293         }
1294
1295         cli->protocol = prots[SVAL(cli->inbuf,smb_vwv0)].prot;
1296
1297         if ((cli->protocol < PROTOCOL_NT1) && cli->sign_info.mandatory_signing) {
1298                 DEBUG(0,("cli_negprot: SMB signing is mandatory and the selected protocol level doesn't support it.\n"));
1299                 return False;
1300         }
1301
1302         if (cli->protocol >= PROTOCOL_NT1) {
1303                 struct timespec ts;
1304                 /* NT protocol */
1305                 cli->sec_mode = CVAL(cli->inbuf,smb_vwv1);
1306                 cli->max_mux = SVAL(cli->inbuf, smb_vwv1+1);
1307                 cli->max_xmit = IVAL(cli->inbuf,smb_vwv3+1);
1308                 cli->sesskey = IVAL(cli->inbuf,smb_vwv7+1);
1309                 cli->serverzone = SVALS(cli->inbuf,smb_vwv15+1);
1310                 cli->serverzone *= 60;
1311                 /* this time arrives in real GMT */
1312                 ts = interpret_long_date(cli->inbuf+smb_vwv11+1);
1313                 cli->servertime = ts.tv_sec;
1314                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1315                 cli->capabilities = IVAL(cli->inbuf,smb_vwv9+1);
1316                 if (cli->capabilities & CAP_RAW_MODE) {
1317                         cli->readbraw_supported = True;
1318                         cli->writebraw_supported = True;
1319                 }
1320                 /* work out if they sent us a workgroup */
1321                 if (!(cli->capabilities & CAP_EXTENDED_SECURITY) &&
1322                     smb_buflen(cli->inbuf) > 8) {
1323                         clistr_pull(cli, cli->server_domain,
1324                                     smb_buf(cli->inbuf)+8, sizeof(cli->server_domain),
1325                                     smb_buflen(cli->inbuf)-8, STR_UNICODE|STR_NOALIGN);
1326                 }
1327
1328                 /*
1329                  * As signing is slow we only turn it on if either the client or
1330                  * the server require it. JRA.
1331                  */
1332
1333                 if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
1334                         /* Fail if server says signing is mandatory and we don't want to support it. */
1335                         if (!cli->sign_info.allow_smb_signing) {
1336                                 DEBUG(0,("cli_negprot: SMB signing is mandatory and we have disabled it.\n"));
1337                                 return False;
1338                         }
1339                         cli->sign_info.negotiated_smb_signing = True;
1340                         cli->sign_info.mandatory_signing = True;
1341                 } else if (cli->sign_info.mandatory_signing && cli->sign_info.allow_smb_signing) {
1342                         /* Fail if client says signing is mandatory and the server doesn't support it. */
1343                         if (!(cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED)) {
1344                                 DEBUG(1,("cli_negprot: SMB signing is mandatory and the server doesn't support it.\n"));
1345                                 return False;
1346                         }
1347                         cli->sign_info.negotiated_smb_signing = True;
1348                         cli->sign_info.mandatory_signing = True;
1349                 } else if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
1350                         cli->sign_info.negotiated_smb_signing = True;
1351                 }
1352
1353                 if (cli->capabilities & (CAP_LARGE_READX|CAP_LARGE_WRITEX)) {
1354                         SAFE_FREE(cli->outbuf);
1355                         SAFE_FREE(cli->inbuf);
1356                         cli->outbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+LARGE_WRITEX_HDR_SIZE+SAFETY_MARGIN);
1357                         cli->inbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+LARGE_WRITEX_HDR_SIZE+SAFETY_MARGIN);
1358                         cli->bufsize = CLI_SAMBA_MAX_LARGE_READX_SIZE + LARGE_WRITEX_HDR_SIZE;
1359                 }
1360
1361         } else if (cli->protocol >= PROTOCOL_LANMAN1) {
1362                 cli->use_spnego = False;
1363                 cli->sec_mode = SVAL(cli->inbuf,smb_vwv1);
1364                 cli->max_xmit = SVAL(cli->inbuf,smb_vwv2);
1365                 cli->max_mux = SVAL(cli->inbuf, smb_vwv3);
1366                 cli->sesskey = IVAL(cli->inbuf,smb_vwv6);
1367                 cli->serverzone = SVALS(cli->inbuf,smb_vwv10);
1368                 cli->serverzone *= 60;
1369                 /* this time is converted to GMT by make_unix_date */
1370                 cli->servertime = cli_make_unix_date(cli,cli->inbuf+smb_vwv8);
1371                 cli->readbraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x1) != 0);
1372                 cli->writebraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x2) != 0);
1373                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1374         } else {
1375                 /* the old core protocol */
1376                 cli->use_spnego = False;
1377                 cli->sec_mode = 0;
1378                 cli->serverzone = get_time_zone(time(NULL));
1379         }
1380
1381         cli->max_xmit = MIN(cli->max_xmit, CLI_BUFFER_SIZE);
1382
1383         /* a way to force ascii SMB */
1384         if (getenv("CLI_FORCE_ASCII"))
1385                 cli->capabilities &= ~CAP_UNICODE;
1386
1387         return True;
1388 }
1389
1390 /****************************************************************************
1391  Send a session request. See rfc1002.txt 4.3 and 4.3.2.
1392 ****************************************************************************/
1393
1394 bool cli_session_request(struct cli_state *cli,
1395                          struct nmb_name *calling, struct nmb_name *called)
1396 {
1397         char *p;
1398         int len = 4;
1399
1400         /* 445 doesn't have session request */
1401         if (cli->port == 445)
1402                 return True;
1403
1404         memcpy(&(cli->calling), calling, sizeof(*calling));
1405         memcpy(&(cli->called ), called , sizeof(*called ));
1406
1407         /* put in the destination name */
1408         p = cli->outbuf+len;
1409         name_mangle(cli->called .name, p, cli->called .name_type);
1410         len += name_len(p);
1411
1412         /* and my name */
1413         p = cli->outbuf+len;
1414         name_mangle(cli->calling.name, p, cli->calling.name_type);
1415         len += name_len(p);
1416
1417         /* send a session request (RFC 1002) */
1418         /* setup the packet length
1419          * Remove four bytes from the length count, since the length
1420          * field in the NBT Session Service header counts the number
1421          * of bytes which follow.  The cli_send_smb() function knows
1422          * about this and accounts for those four bytes.
1423          * CRH.
1424          */
1425         len -= 4;
1426         _smb_setlen(cli->outbuf,len);
1427         SCVAL(cli->outbuf,0,0x81);
1428
1429         cli_send_smb(cli);
1430         DEBUG(5,("Sent session request\n"));
1431
1432         if (!cli_receive_smb(cli))
1433                 return False;
1434
1435         if (CVAL(cli->inbuf,0) == 0x84) {
1436                 /* C. Hoch  9/14/95 Start */
1437                 /* For information, here is the response structure.
1438                  * We do the byte-twiddling to for portability.
1439                 struct RetargetResponse{
1440                 unsigned char type;
1441                 unsigned char flags;
1442                 int16 length;
1443                 int32 ip_addr;
1444                 int16 port;
1445                 };
1446                 */
1447                 uint16_t port = (CVAL(cli->inbuf,8)<<8)+CVAL(cli->inbuf,9);
1448                 struct in_addr dest_ip;
1449
1450                 /* SESSION RETARGET */
1451                 putip((char *)&dest_ip,cli->inbuf+4);
1452                 in_addr_to_sockaddr_storage(&cli->dest_ss, dest_ip);
1453
1454                 cli->fd = open_socket_out(SOCK_STREAM,
1455                                 &cli->dest_ss,
1456                                 port,
1457                                 LONG_CONNECT_TIMEOUT);
1458                 if (cli->fd == -1)
1459                         return False;
1460
1461                 DEBUG(3,("Retargeted\n"));
1462
1463                 set_socket_options(cli->fd, lp_socket_options());
1464
1465                 /* Try again */
1466                 {
1467                         static int depth;
1468                         bool ret;
1469                         if (depth > 4) {
1470                                 DEBUG(0,("Retarget recursion - failing\n"));
1471                                 return False;
1472                         }
1473                         depth++;
1474                         ret = cli_session_request(cli, calling, called);
1475                         depth--;
1476                         return ret;
1477                 }
1478         } /* C. Hoch 9/14/95 End */
1479
1480         if (CVAL(cli->inbuf,0) != 0x82) {
1481                 /* This is the wrong place to put the error... JRA. */
1482                 cli->rap_error = CVAL(cli->inbuf,4);
1483                 return False;
1484         }
1485         return(True);
1486 }
1487
1488 /****************************************************************************
1489  Open the client sockets.
1490 ****************************************************************************/
1491
1492 NTSTATUS cli_connect(struct cli_state *cli,
1493                 const char *host,
1494                 struct sockaddr_storage *dest_ss)
1495
1496 {
1497         int name_type = 0x20;
1498         TALLOC_CTX *frame = talloc_stackframe();
1499         unsigned int num_addrs = 0;
1500         unsigned int i = 0;
1501         struct sockaddr_storage *ss_arr = NULL;
1502         char *p = NULL;
1503
1504         /* reasonable default hostname */
1505         if (!host) {
1506                 host = star_smbserver_name;
1507         }
1508
1509         fstrcpy(cli->desthost, host);
1510
1511         /* allow hostnames of the form NAME#xx and do a netbios lookup */
1512         if ((p = strchr(cli->desthost, '#'))) {
1513                 name_type = strtol(p+1, NULL, 16);
1514                 *p = 0;
1515         }
1516
1517         if (!dest_ss || is_zero_addr((struct sockaddr *)dest_ss)) {
1518                 NTSTATUS status =resolve_name_list(frame,
1519                                         cli->desthost,
1520                                         name_type,
1521                                         &ss_arr,
1522                                         &num_addrs);
1523                 if (!NT_STATUS_IS_OK(status)) {
1524                         TALLOC_FREE(frame);
1525                         return NT_STATUS_BAD_NETWORK_NAME;
1526                 }
1527         } else {
1528                 num_addrs = 1;
1529                 ss_arr = TALLOC_P(frame, struct sockaddr_storage);
1530                 if (!ss_arr) {
1531                         TALLOC_FREE(frame);
1532                         return NT_STATUS_NO_MEMORY;
1533                 }
1534                 *ss_arr = *dest_ss;
1535         }
1536
1537         for (i = 0; i < num_addrs; i++) {
1538                 cli->dest_ss = ss_arr[i];
1539                 if (getenv("LIBSMB_PROG")) {
1540                         cli->fd = sock_exec(getenv("LIBSMB_PROG"));
1541                 } else {
1542                         /* try 445 first, then 139 */
1543                         uint16_t port = cli->port?cli->port:445;
1544                         cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ss,
1545                                                   port, cli->timeout);
1546                         if (cli->fd == -1 && cli->port == 0) {
1547                                 port = 139;
1548                                 cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ss,
1549                                                           port, cli->timeout);
1550                         }
1551                         if (cli->fd != -1) {
1552                                 cli->port = port;
1553                         }
1554                 }
1555                 if (cli->fd == -1) {
1556                         char addr[INET6_ADDRSTRLEN];
1557                         print_sockaddr(addr, sizeof(addr), &ss_arr[i]);
1558                         DEBUG(2,("Error connecting to %s (%s)\n",
1559                                  dest_ss?addr:host,strerror(errno)));
1560                 } else {
1561                         /* Exit from loop on first connection. */
1562                         break;
1563                 }
1564         }
1565
1566         if (cli->fd == -1) {
1567                 TALLOC_FREE(frame);
1568                 return map_nt_error_from_unix(errno);
1569         }
1570
1571         if (dest_ss) {
1572                 *dest_ss = cli->dest_ss;
1573         }
1574
1575         set_socket_options(cli->fd, lp_socket_options());
1576
1577         TALLOC_FREE(frame);
1578         return NT_STATUS_OK;
1579 }
1580
1581 /**
1582    establishes a connection to after the negprot.
1583    @param output_cli A fully initialised cli structure, non-null only on success
1584    @param dest_host The netbios name of the remote host
1585    @param dest_ss (optional) The the destination IP, NULL for name based lookup
1586    @param port (optional) The destination port (0 for default)
1587    @param retry bool. Did this connection fail with a retryable error ?
1588
1589 */
1590 NTSTATUS cli_start_connection(struct cli_state **output_cli,
1591                               const char *my_name,
1592                               const char *dest_host,
1593                               struct sockaddr_storage *dest_ss, int port,
1594                               int signing_state, int flags,
1595                               bool *retry)
1596 {
1597         NTSTATUS nt_status;
1598         struct nmb_name calling;
1599         struct nmb_name called;
1600         struct cli_state *cli;
1601         struct sockaddr_storage ss;
1602
1603         if (retry)
1604                 *retry = False;
1605
1606         if (!my_name)
1607                 my_name = global_myname();
1608
1609         if (!(cli = cli_initialise())) {
1610                 return NT_STATUS_NO_MEMORY;
1611         }
1612
1613         make_nmb_name(&calling, my_name, 0x0);
1614         make_nmb_name(&called , dest_host, 0x20);
1615
1616         if (cli_set_port(cli, port) != port) {
1617                 cli_shutdown(cli);
1618                 return NT_STATUS_UNSUCCESSFUL;
1619         }
1620
1621         cli_set_timeout(cli, 10000); /* 10 seconds. */
1622
1623         if (dest_ss) {
1624                 ss = *dest_ss;
1625         } else {
1626                 zero_sockaddr(&ss);
1627         }
1628
1629 again:
1630
1631         DEBUG(3,("Connecting to host=%s\n", dest_host));
1632
1633         nt_status = cli_connect(cli, dest_host, &ss);
1634         if (!NT_STATUS_IS_OK(nt_status)) {
1635                 char addr[INET6_ADDRSTRLEN];
1636                 print_sockaddr(addr, sizeof(addr), &ss);
1637                 DEBUG(1,("cli_start_connection: failed to connect to %s (%s). Error %s\n",
1638                          nmb_namestr(&called), addr, nt_errstr(nt_status) ));
1639                 cli_shutdown(cli);
1640                 return nt_status;
1641         }
1642
1643         if (retry)
1644                 *retry = True;
1645
1646         if (!cli_session_request(cli, &calling, &called)) {
1647                 char *p;
1648                 DEBUG(1,("session request to %s failed (%s)\n",
1649                          called.name, cli_errstr(cli)));
1650                 if ((p=strchr(called.name, '.')) && !is_ipaddress(called.name)) {
1651                         *p = 0;
1652                         goto again;
1653                 }
1654                 if (strcmp(called.name, star_smbserver_name)) {
1655                         make_nmb_name(&called , star_smbserver_name, 0x20);
1656                         goto again;
1657                 }
1658                 return NT_STATUS_BAD_NETWORK_NAME;
1659         }
1660
1661         cli_setup_signing_state(cli, signing_state);
1662
1663         if (flags & CLI_FULL_CONNECTION_DONT_SPNEGO)
1664                 cli->use_spnego = False;
1665         else if (flags & CLI_FULL_CONNECTION_USE_KERBEROS)
1666                 cli->use_kerberos = True;
1667
1668         if ((flags & CLI_FULL_CONNECTION_FALLBACK_AFTER_KERBEROS) &&
1669              cli->use_kerberos) {
1670                 cli->fallback_after_kerberos = true;
1671         }
1672
1673         if (!cli_negprot(cli)) {
1674                 DEBUG(1,("failed negprot\n"));
1675                 nt_status = cli_nt_error(cli);
1676                 if (NT_STATUS_IS_OK(nt_status)) {
1677                         nt_status = NT_STATUS_UNSUCCESSFUL;
1678                 }
1679                 cli_shutdown(cli);
1680                 return nt_status;
1681         }
1682
1683         *output_cli = cli;
1684         return NT_STATUS_OK;
1685 }
1686
1687
1688 /**
1689    establishes a connection right up to doing tconX, password specified.
1690    @param output_cli A fully initialised cli structure, non-null only on success
1691    @param dest_host The netbios name of the remote host
1692    @param dest_ip (optional) The the destination IP, NULL for name based lookup
1693    @param port (optional) The destination port (0 for default)
1694    @param service (optional) The share to make the connection to.  Should be 'unqualified' in any way.
1695    @param service_type The 'type' of serivice.
1696    @param user Username, unix string
1697    @param domain User's domain
1698    @param password User's password, unencrypted unix string.
1699    @param retry bool. Did this connection fail with a retryable error ?
1700 */
1701
1702 NTSTATUS cli_full_connection(struct cli_state **output_cli,
1703                              const char *my_name,
1704                              const char *dest_host,
1705                              struct sockaddr_storage *dest_ss, int port,
1706                              const char *service, const char *service_type,
1707                              const char *user, const char *domain,
1708                              const char *password, int flags,
1709                              int signing_state,
1710                              bool *retry)
1711 {
1712         NTSTATUS nt_status;
1713         struct cli_state *cli = NULL;
1714         int pw_len = password ? strlen(password)+1 : 0;
1715
1716         *output_cli = NULL;
1717
1718         if (password == NULL) {
1719                 password = "";
1720         }
1721
1722         nt_status = cli_start_connection(&cli, my_name, dest_host,
1723                                          dest_ss, port, signing_state,
1724                                          flags, retry);
1725
1726         if (!NT_STATUS_IS_OK(nt_status)) {
1727                 return nt_status;
1728         }
1729
1730         nt_status = cli_session_setup(cli, user, password, pw_len, password,
1731                                       pw_len, domain);
1732         if (!NT_STATUS_IS_OK(nt_status)) {
1733
1734                 if (!(flags & CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK)) {
1735                         DEBUG(1,("failed session setup with %s\n",
1736                                  nt_errstr(nt_status)));
1737                         cli_shutdown(cli);
1738                         return nt_status;
1739                 }
1740
1741                 nt_status = cli_session_setup(cli, "", "", 0, "", 0, domain);
1742                 if (!NT_STATUS_IS_OK(nt_status)) {
1743                         DEBUG(1,("anonymous failed session setup with %s\n",
1744                                  nt_errstr(nt_status)));
1745                         cli_shutdown(cli);
1746                         return nt_status;
1747                 }
1748         }
1749
1750         if (service) {
1751                 if (!cli_send_tconX(cli, service, service_type, password, pw_len)) {
1752                         nt_status = cli_nt_error(cli);
1753                         DEBUG(1,("failed tcon_X with %s\n", nt_errstr(nt_status)));
1754                         cli_shutdown(cli);
1755                         if (NT_STATUS_IS_OK(nt_status)) {
1756                                 nt_status = NT_STATUS_UNSUCCESSFUL;
1757                         }
1758                         return nt_status;
1759                 }
1760         }
1761
1762         cli_init_creds(cli, user, domain, password);
1763
1764         *output_cli = cli;
1765         return NT_STATUS_OK;
1766 }
1767
1768 /****************************************************************************
1769  Attempt a NetBIOS session request, falling back to *SMBSERVER if needed.
1770 ****************************************************************************/
1771
1772 bool attempt_netbios_session_request(struct cli_state **ppcli, const char *srchost, const char *desthost,
1773                                      struct sockaddr_storage *pdest_ss)
1774 {
1775         struct nmb_name calling, called;
1776
1777         make_nmb_name(&calling, srchost, 0x0);
1778
1779         /*
1780          * If the called name is an IP address
1781          * then use *SMBSERVER immediately.
1782          */
1783
1784         if(is_ipaddress(desthost)) {
1785                 make_nmb_name(&called, star_smbserver_name, 0x20);
1786         } else {
1787                 make_nmb_name(&called, desthost, 0x20);
1788         }
1789
1790         if (!cli_session_request(*ppcli, &calling, &called)) {
1791                 NTSTATUS status;
1792                 struct nmb_name smbservername;
1793
1794                 make_nmb_name(&smbservername, star_smbserver_name, 0x20);
1795
1796                 /*
1797                  * If the name wasn't *SMBSERVER then
1798                  * try with *SMBSERVER if the first name fails.
1799                  */
1800
1801                 if (nmb_name_equal(&called, &smbservername)) {
1802
1803                         /*
1804                          * The name used was *SMBSERVER, don't bother with another name.
1805                          */
1806
1807                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for name *SMBSERVER \
1808 with error %s.\n", desthost, cli_errstr(*ppcli) ));
1809                         return False;
1810                 }
1811
1812                 /* Try again... */
1813                 cli_shutdown(*ppcli);
1814
1815                 *ppcli = cli_initialise();
1816                 if (!*ppcli) {
1817                         /* Out of memory... */
1818                         return False;
1819                 }
1820
1821                 status = cli_connect(*ppcli, desthost, pdest_ss);
1822                 if (!NT_STATUS_IS_OK(status) ||
1823                                 !cli_session_request(*ppcli, &calling, &smbservername)) {
1824                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for \
1825 name *SMBSERVER with error %s\n", desthost, cli_errstr(*ppcli) ));
1826                         return False;
1827                 }
1828         }
1829
1830         return True;
1831 }
1832
1833 /****************************************************************************
1834  Send an old style tcon.
1835 ****************************************************************************/
1836 NTSTATUS cli_raw_tcon(struct cli_state *cli,
1837                       const char *service, const char *pass, const char *dev,
1838                       uint16 *max_xmit, uint16 *tid)
1839 {
1840         char *p;
1841
1842         if (!lp_client_plaintext_auth() && (*pass)) {
1843                 DEBUG(1, ("Server requested plaintext password but 'client "
1844                           "plaintext auth' is disabled\n"));
1845                 return NT_STATUS_ACCESS_DENIED;
1846         }
1847
1848         memset(cli->outbuf,'\0',smb_size);
1849         memset(cli->inbuf,'\0',smb_size);
1850
1851         cli_set_message(cli->outbuf, 0, 0, True);
1852         SCVAL(cli->outbuf,smb_com,SMBtcon);
1853         cli_setup_packet(cli);
1854
1855         p = smb_buf(cli->outbuf);
1856         *p++ = 4; p += clistr_push(cli, p, service, -1, STR_TERMINATE | STR_NOALIGN);
1857         *p++ = 4; p += clistr_push(cli, p, pass, -1, STR_TERMINATE | STR_NOALIGN);
1858         *p++ = 4; p += clistr_push(cli, p, dev, -1, STR_TERMINATE | STR_NOALIGN);
1859
1860         cli_setup_bcc(cli, p);
1861
1862         cli_send_smb(cli);
1863         if (!cli_receive_smb(cli)) {
1864                 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
1865         }
1866
1867         if (cli_is_error(cli)) {
1868                 return cli_nt_error(cli);
1869         }
1870
1871         *max_xmit = SVAL(cli->inbuf, smb_vwv0);
1872         *tid = SVAL(cli->inbuf, smb_vwv1);
1873
1874         return NT_STATUS_OK;
1875 }
1876
1877 /* Return a cli_state pointing at the IPC$ share for the given server */
1878
1879 struct cli_state *get_ipc_connect(char *server,
1880                                 struct sockaddr_storage *server_ss,
1881                                 const struct user_auth_info *user_info)
1882 {
1883         struct cli_state *cli;
1884         NTSTATUS nt_status;
1885         uint32_t flags = CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK;
1886
1887         if (user_info->use_kerberos) {
1888                 flags |= CLI_FULL_CONNECTION_USE_KERBEROS;
1889         }
1890
1891         nt_status = cli_full_connection(&cli, NULL, server, server_ss, 0, "IPC$", "IPC",
1892                                         user_info->username ? user_info->username : "",
1893                                         lp_workgroup(),
1894                                         user_info->password ? user_info->password : "",
1895                                         flags,
1896                                         Undefined, NULL);
1897
1898         if (NT_STATUS_IS_OK(nt_status)) {
1899                 return cli;
1900         } else if (is_ipaddress(server)) {
1901             /* windows 9* needs a correct NMB name for connections */
1902             fstring remote_name;
1903
1904             if (name_status_find("*", 0, 0, server_ss, remote_name)) {
1905                 cli = get_ipc_connect(remote_name, server_ss, user_info);
1906                 if (cli)
1907                     return cli;
1908             }
1909         }
1910         return NULL;
1911 }
1912
1913 /*
1914  * Given the IP address of a master browser on the network, return its
1915  * workgroup and connect to it.
1916  *
1917  * This function is provided to allow additional processing beyond what
1918  * get_ipc_connect_master_ip_bcast() does, e.g. to retrieve the list of master
1919  * browsers and obtain each master browsers' list of domains (in case the
1920  * first master browser is recently on the network and has not yet
1921  * synchronized with other master browsers and therefore does not yet have the
1922  * entire network browse list)
1923  */
1924
1925 struct cli_state *get_ipc_connect_master_ip(TALLOC_CTX *ctx,
1926                                 struct ip_service *mb_ip,
1927                                 const struct user_auth_info *user_info,
1928                                 char **pp_workgroup_out)
1929 {
1930         char addr[INET6_ADDRSTRLEN];
1931         fstring name;
1932         struct cli_state *cli;
1933         struct sockaddr_storage server_ss;
1934
1935         *pp_workgroup_out = NULL;
1936
1937         print_sockaddr(addr, sizeof(addr), &mb_ip->ss);
1938         DEBUG(99, ("Looking up name of master browser %s\n",
1939                    addr));
1940
1941         /*
1942          * Do a name status query to find out the name of the master browser.
1943          * We use <01><02>__MSBROWSE__<02>#01 if *#00 fails because a domain
1944          * master browser will not respond to a wildcard query (or, at least,
1945          * an NT4 server acting as the domain master browser will not).
1946          *
1947          * We might be able to use ONLY the query on MSBROWSE, but that's not
1948          * yet been tested with all Windows versions, so until it is, leave
1949          * the original wildcard query as the first choice and fall back to
1950          * MSBROWSE if the wildcard query fails.
1951          */
1952         if (!name_status_find("*", 0, 0x1d, &mb_ip->ss, name) &&
1953             !name_status_find(MSBROWSE, 1, 0x1d, &mb_ip->ss, name)) {
1954
1955                 DEBUG(99, ("Could not retrieve name status for %s\n",
1956                            addr));
1957                 return NULL;
1958         }
1959
1960         if (!find_master_ip(name, &server_ss)) {
1961                 DEBUG(99, ("Could not find master ip for %s\n", name));
1962                 return NULL;
1963         }
1964
1965         *pp_workgroup_out = talloc_strdup(ctx, name);
1966
1967         DEBUG(4, ("found master browser %s, %s\n", name, addr));
1968
1969         print_sockaddr(addr, sizeof(addr), &server_ss);
1970         cli = get_ipc_connect(addr, &server_ss, user_info);
1971
1972         return cli;
1973 }
1974
1975 /*
1976  * Return the IP address and workgroup of a master browser on the network, and
1977  * connect to it.
1978  */
1979
1980 struct cli_state *get_ipc_connect_master_ip_bcast(TALLOC_CTX *ctx,
1981                                         const struct user_auth_info *user_info,
1982                                         char **pp_workgroup_out)
1983 {
1984         struct ip_service *ip_list;
1985         struct cli_state *cli;
1986         int i, count;
1987
1988         *pp_workgroup_out = NULL;
1989
1990         DEBUG(99, ("Do broadcast lookup for workgroups on local network\n"));
1991
1992         /* Go looking for workgroups by broadcasting on the local network */
1993
1994         if (!NT_STATUS_IS_OK(name_resolve_bcast(MSBROWSE, 1, &ip_list,
1995                                                 &count))) {
1996                 DEBUG(99, ("No master browsers responded\n"));
1997                 return False;
1998         }
1999
2000         for (i = 0; i < count; i++) {
2001                 char addr[INET6_ADDRSTRLEN];
2002                 print_sockaddr(addr, sizeof(addr), &ip_list[i].ss);
2003                 DEBUG(99, ("Found master browser %s\n", addr));
2004
2005                 cli = get_ipc_connect_master_ip(ctx, &ip_list[i],
2006                                 user_info, pp_workgroup_out);
2007                 if (cli)
2008                         return(cli);
2009         }
2010
2011         return NULL;
2012 }