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[24];
  26 } prots[10] = {
  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 };
  38
  39 #define STAR_SMBSERVER "*SMBSERVER"
  40
  41 /**
  42  * Set the user session key for a connection
  43  * @param cli The cli structure to add it too
  44  * @param session_key The session key used.  (A copy of this is taken for the cli struct)
  45  *
  46  */
  47
  48 static void cli_set_session_key (struct cli_state *cli, const DATA_BLOB session_key)
  49 {
  50         cli->user_session_key = data_blob(session_key.data, session_key.length);
  51 }
  52
  53 /****************************************************************************
  54  Do an old lanman2 style session setup.
  55 ****************************************************************************/
  56
  57 static NTSTATUS cli_session_setup_lanman2(struct cli_state *cli,
  58                                           const char *user,
  59                                           const char *pass, size_t passlen,
  60                                           const char *workgroup)
  61 {
  62         DATA_BLOB session_key = data_blob_null;
  63         DATA_BLOB lm_response = data_blob_null;
  64         fstring pword;
  65         char *p;
  66
  67         if (passlen > sizeof(pword)-1) {
  68                 return NT_STATUS_INVALID_PARAMETER;
  69         }
  70
  71         /* LANMAN servers predate NT status codes and Unicode and ignore those
  72            smb flags so we must disable the corresponding default capabilities
  73            that would otherwise cause the Unicode and NT Status flags to be
  74            set (and even returned by the server) */
  75
  76         cli->capabilities &= ~(CAP_UNICODE | CAP_STATUS32);
  77
  78         /* if in share level security then don't send a password now */
  79         if (!(cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL))
  80                 passlen = 0;
  81
  82         if (passlen > 0 && (cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) && passlen != 24) {
  83                 /* Encrypted mode needed, and non encrypted password supplied. */
  84                 lm_response = data_blob(NULL, 24);
  85                 if (!SMBencrypt(pass, cli->secblob.data,(uchar *)lm_response.data)) {
  86                         DEBUG(1, ("Password is > 14 chars in length, and is therefore incompatible with Lanman authentication\n"));
  87                         return NT_STATUS_ACCESS_DENIED;
  88                 }
  89         } else if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) && passlen == 24) {
  90                 /* Encrypted mode needed, and encrypted password supplied. */
  91                 lm_response = data_blob(pass, passlen);
  92         } else if (passlen > 0) {
  93                 /* Plaintext mode needed, assume plaintext supplied. */
  94                 passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
  95                 lm_response = data_blob(pass, passlen);
  96         }
  97
  98         /* send a session setup command */
  99         memset(cli->outbuf,'\0',smb_size);
 100         cli_set_message(cli->outbuf,10, 0, True);
 101         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 102         cli_setup_packet(cli);
 103
 104         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 105         SSVAL(cli->outbuf,smb_vwv2,cli->max_xmit);
 106         SSVAL(cli->outbuf,smb_vwv3,2);
 107         SSVAL(cli->outbuf,smb_vwv4,1);
 108         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 109         SSVAL(cli->outbuf,smb_vwv7,lm_response.length);
 110
 111         p = smb_buf(cli->outbuf);
 112         memcpy(p,lm_response.data,lm_response.length);
 113         p += lm_response.length;
 114         p += clistr_push(cli, p, user, -1, STR_TERMINATE|STR_UPPER);
 115         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE|STR_UPPER);
 116         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 117         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 118         cli_setup_bcc(cli, p);
 119
 120         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 121                 return cli_nt_error(cli);
 122         }
 123
 124         show_msg(cli->inbuf);
 125
 126         if (cli_is_error(cli)) {
 127                 return cli_nt_error(cli);
 128         }
 129
 130         /* use the returned vuid from now on */
 131         cli->vuid = SVAL(cli->inbuf,smb_uid);
 132         fstrcpy(cli->user_name, user);
 133
 134         if (session_key.data) {
 135                 /* Have plaintext orginal */
 136                 cli_set_session_key(cli, session_key);
 137         }
 138
 139         return NT_STATUS_OK;
 140 }
 141
 142 /****************************************************************************
 143  Work out suitable capabilities to offer the server.
 144 ****************************************************************************/
 145
 146 static uint32 cli_session_setup_capabilities(struct cli_state *cli)
 147 {
 148         uint32 capabilities = CAP_NT_SMBS;
 149
 150         if (!cli->force_dos_errors)
 151                 capabilities |= CAP_STATUS32;
 152
 153         if (cli->use_level_II_oplocks)
 154                 capabilities |= CAP_LEVEL_II_OPLOCKS;
 155
 156         capabilities |= (cli->capabilities & (CAP_UNICODE|CAP_LARGE_FILES|CAP_LARGE_READX|CAP_LARGE_WRITEX|CAP_DFS));
 157         return capabilities;
 158 }
 159
 160 /****************************************************************************
 161  Do a NT1 guest session setup.
 162 ****************************************************************************/
 163
 164 static NTSTATUS cli_session_setup_guest(struct cli_state *cli)
 165 {
 166         char *p;
 167         uint32 capabilities = cli_session_setup_capabilities(cli);
 168
 169         memset(cli->outbuf, '\0', smb_size);
 170         cli_set_message(cli->outbuf,13,0,True);
 171         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 172         cli_setup_packet(cli);
 173
 174         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 175         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 176         SSVAL(cli->outbuf,smb_vwv3,2);
 177         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 178         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 179         SSVAL(cli->outbuf,smb_vwv7,0);
 180         SSVAL(cli->outbuf,smb_vwv8,0);
 181         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 182         p = smb_buf(cli->outbuf);
 183         p += clistr_push(cli, p, "", -1, STR_TERMINATE); /* username */
 184         p += clistr_push(cli, p, "", -1, STR_TERMINATE); /* workgroup */
 185         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 186         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 187         cli_setup_bcc(cli, p);
 188
 189         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 190                 return cli_nt_error(cli);
 191         }
 192
 193         show_msg(cli->inbuf);
 194
 195         if (cli_is_error(cli)) {
 196                 return cli_nt_error(cli);
 197         }
 198
 199         cli->vuid = SVAL(cli->inbuf,smb_uid);
 200
 201         p = smb_buf(cli->inbuf);
 202         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 203         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 204         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 205
 206         if (strstr(cli->server_type, "Samba")) {
 207                 cli->is_samba = True;
 208         }
 209
 210         fstrcpy(cli->user_name, "");
 211
 212         return NT_STATUS_OK;
 213 }
 214
 215 /****************************************************************************
 216  Do a NT1 plaintext session setup.
 217 ****************************************************************************/
 218
 219 static NTSTATUS cli_session_setup_plaintext(struct cli_state *cli,
 220                                             const char *user, const char *pass,
 221                                             const char *workgroup)
 222 {
 223         uint32 capabilities = cli_session_setup_capabilities(cli);
 224         char *p;
 225         fstring lanman;
 226
 227         fstr_sprintf( lanman, "Samba %s", SAMBA_VERSION_STRING);
 228
 229         memset(cli->outbuf, '\0', smb_size);
 230         cli_set_message(cli->outbuf,13,0,True);
 231         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 232         cli_setup_packet(cli);
 233
 234         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 235         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 236         SSVAL(cli->outbuf,smb_vwv3,2);
 237         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 238         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 239         SSVAL(cli->outbuf,smb_vwv8,0);
 240         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 241         p = smb_buf(cli->outbuf);
 242
 243         /* check wether to send the ASCII or UNICODE version of the password */
 244
 245         if ( (capabilities & CAP_UNICODE) == 0 ) {
 246                 p += clistr_push(cli, p, pass, -1, STR_TERMINATE); /* password */
 247                 SSVAL(cli->outbuf,smb_vwv7,PTR_DIFF(p, smb_buf(cli->outbuf)));
 248         }
 249         else {
 250                 /* For ucs2 passwords clistr_push calls ucs2_align, which causes
 251                  * the space taken by the unicode password to be one byte too
 252                  * long (as we're on an odd byte boundary here). Reduce the
 253                  * count by 1 to cope with this. Fixes smbclient against NetApp
 254                  * servers which can't cope. Fix from
 255                  * bryan.kolodziej@allenlund.com in bug #3840.
 256                  */
 257                 p += clistr_push(cli, p, pass, -1, STR_UNICODE|STR_TERMINATE); /* unicode password */
 258                 SSVAL(cli->outbuf,smb_vwv8,PTR_DIFF(p, smb_buf(cli->outbuf))-1);
 259         }
 260
 261         p += clistr_push(cli, p, user, -1, STR_TERMINATE); /* username */
 262         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE); /* workgroup */
 263         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 264         p += clistr_push(cli, p, lanman, -1, STR_TERMINATE);
 265         cli_setup_bcc(cli, p);
 266
 267         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 268                 return cli_nt_error(cli);
 269         }
 270
 271         show_msg(cli->inbuf);
 272
 273         if (cli_is_error(cli)) {
 274                 return cli_nt_error(cli);
 275         }
 276
 277         cli->vuid = SVAL(cli->inbuf,smb_uid);
 278         p = smb_buf(cli->inbuf);
 279         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 280         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 281         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 282         fstrcpy(cli->user_name, user);
 283
 284         if (strstr(cli->server_type, "Samba")) {
 285                 cli->is_samba = True;
 286         }
 287
 288         return NT_STATUS_OK;
 289 }
 290
 291 /****************************************************************************
 292    do a NT1 NTLM/LM encrypted session setup - for when extended security
 293    is not negotiated.
 294    @param cli client state to create do session setup on
 295    @param user username
 296    @param pass *either* cleartext password (passlen !=24) or LM response.
 297    @param ntpass NT response, implies ntpasslen >=24, implies pass is not clear
 298    @param workgroup The user's domain.
 299 ****************************************************************************/
 300
 301 static NTSTATUS cli_session_setup_nt1(struct cli_state *cli, const char *user,
 302                                       const char *pass, size_t passlen,
 303                                       const char *ntpass, size_t ntpasslen,
 304                                       const char *workgroup)
 305 {
 306         uint32 capabilities = cli_session_setup_capabilities(cli);
 307         DATA_BLOB lm_response = data_blob_null;
 308         DATA_BLOB nt_response = data_blob_null;
 309         DATA_BLOB session_key = data_blob_null;
 310         NTSTATUS result;
 311         char *p;
 312
 313         if (passlen == 0) {
 314                 /* do nothing - guest login */
 315         } else if (passlen != 24) {
 316                 if (lp_client_ntlmv2_auth()) {
 317                         DATA_BLOB server_chal;
 318                         DATA_BLOB names_blob;
 319                         server_chal = data_blob(cli->secblob.data, MIN(cli->secblob.length, 8));
 320
 321                         /* note that the 'workgroup' here is a best guess - we don't know
 322                            the server's domain at this point.  The 'server name' is also
 323                            dodgy...
 324                         */
 325                         names_blob = NTLMv2_generate_names_blob(cli->called.name, workgroup);
 326
 327                         if (!SMBNTLMv2encrypt(user, workgroup, pass, &server_chal,
 328                                               &names_blob,
 329                                               &lm_response, &nt_response, &session_key)) {
 330                                 data_blob_free(&names_blob);
 331                                 data_blob_free(&server_chal);
 332                                 return NT_STATUS_ACCESS_DENIED;
 333                         }
 334                         data_blob_free(&names_blob);
 335                         data_blob_free(&server_chal);
 336
 337                 } else {
 338                         uchar nt_hash[16];
 339                         E_md4hash(pass, nt_hash);
 340
 341 #ifdef LANMAN_ONLY
 342                         nt_response = data_blob_null;
 343 #else
 344                         nt_response = data_blob(NULL, 24);
 345                         SMBNTencrypt(pass,cli->secblob.data,nt_response.data);
 346 #endif
 347                         /* non encrypted password supplied. Ignore ntpass. */
 348                         if (lp_client_lanman_auth()) {
 349                                 lm_response = data_blob(NULL, 24);
 350                                 if (!SMBencrypt(pass,cli->secblob.data, lm_response.data)) {
 351                                         /* Oops, the LM response is invalid, just put
 352                                            the NT response there instead */
 353                                         data_blob_free(&lm_response);
 354                                         lm_response = data_blob(nt_response.data, nt_response.length);
 355                                 }
 356                         } else {
 357                                 /* LM disabled, place NT# in LM field instead */
 358                                 lm_response = data_blob(nt_response.data, nt_response.length);
 359                         }
 360
 361                         session_key = data_blob(NULL, 16);
 362 #ifdef LANMAN_ONLY
 363                         E_deshash(pass, session_key.data);
 364                         memset(&session_key.data[8], '\0', 8);
 365 #else
 366                         SMBsesskeygen_ntv1(nt_hash, NULL, session_key.data);
 367 #endif
 368                 }
 369 #ifdef LANMAN_ONLY
 370                 cli_simple_set_signing(cli, session_key, lm_response);
 371 #else
 372                 cli_simple_set_signing(cli, session_key, nt_response);
 373 #endif
 374         } else {
 375                 /* pre-encrypted password supplied.  Only used for
 376                    security=server, can't do
 377                    signing because we don't have original key */
 378
 379                 lm_response = data_blob(pass, passlen);
 380                 nt_response = data_blob(ntpass, ntpasslen);
 381         }
 382
 383         /* send a session setup command */
 384         memset(cli->outbuf,'\0',smb_size);
 385
 386         cli_set_message(cli->outbuf,13,0,True);
 387         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 388         cli_setup_packet(cli);
 389
 390         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 391         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 392         SSVAL(cli->outbuf,smb_vwv3,2);
 393         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 394         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 395         SSVAL(cli->outbuf,smb_vwv7,lm_response.length);
 396         SSVAL(cli->outbuf,smb_vwv8,nt_response.length);
 397         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 398         p = smb_buf(cli->outbuf);
 399         if (lm_response.length) {
 400                 memcpy(p,lm_response.data, lm_response.length); p += lm_response.length;
 401         }
 402         if (nt_response.length) {
 403                 memcpy(p,nt_response.data, nt_response.length); p += nt_response.length;
 404         }
 405         p += clistr_push(cli, p, user, -1, STR_TERMINATE);
 406
 407         /* Upper case here might help some NTLMv2 implementations */
 408         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE|STR_UPPER);
 409         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 410         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 411         cli_setup_bcc(cli, p);
 412
 413         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 414                 result = cli_nt_error(cli);
 415                 goto end;
 416         }
 417
 418         /* show_msg(cli->inbuf); */
 419
 420         if (cli_is_error(cli)) {
 421                 result = cli_nt_error(cli);
 422                 goto end;
 423         }
 424
 425         /* use the returned vuid from now on */
 426         cli->vuid = SVAL(cli->inbuf,smb_uid);
 427
 428         p = smb_buf(cli->inbuf);
 429         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 430         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 431         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 432
 433         if (strstr(cli->server_type, "Samba")) {
 434                 cli->is_samba = True;
 435         }
 436
 437         fstrcpy(cli->user_name, user);
 438
 439         if (session_key.data) {
 440                 /* Have plaintext orginal */
 441                 cli_set_session_key(cli, session_key);
 442         }
 443
 444         result = NT_STATUS_OK;
 445 end:
 446         data_blob_free(&lm_response);
 447         data_blob_free(&nt_response);
 448         data_blob_free(&session_key);
 449         return result;
 450 }
 451
 452 /****************************************************************************
 453  Send a extended security session setup blob
 454 ****************************************************************************/
 455
 456 static bool cli_session_setup_blob_send(struct cli_state *cli, DATA_BLOB blob)
 457 {
 458         uint32 capabilities = cli_session_setup_capabilities(cli);
 459         char *p;
 460
 461         capabilities |= CAP_EXTENDED_SECURITY;
 462
 463         /* send a session setup command */
 464         memset(cli->outbuf,'\0',smb_size);
 465
 466         cli_set_message(cli->outbuf,12,0,True);
 467         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 468
 469         cli_setup_packet(cli);
 470
 471         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 472         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 473         SSVAL(cli->outbuf,smb_vwv3,2);
 474         SSVAL(cli->outbuf,smb_vwv4,1);
 475         SIVAL(cli->outbuf,smb_vwv5,0);
 476         SSVAL(cli->outbuf,smb_vwv7,blob.length);
 477         SIVAL(cli->outbuf,smb_vwv10,capabilities);
 478         p = smb_buf(cli->outbuf);
 479         memcpy(p, blob.data, blob.length);
 480         p += blob.length;
 481         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 482         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 483         cli_setup_bcc(cli, p);
 484         return cli_send_smb(cli);
 485 }
 486
 487 /****************************************************************************
 488  Send a extended security session setup blob, returning a reply blob.
 489 ****************************************************************************/
 490
 491 static DATA_BLOB cli_session_setup_blob_receive(struct cli_state *cli)
 492 {
 493         DATA_BLOB blob2 = data_blob_null;
 494         char *p;
 495         size_t len;
 496
 497         if (!cli_receive_smb(cli))
 498                 return blob2;
 499
 500         show_msg(cli->inbuf);
 501
 502         if (cli_is_error(cli) && !NT_STATUS_EQUAL(cli_nt_error(cli),
 503                                                   NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 504                 return blob2;
 505         }
 506
 507         /* use the returned vuid from now on */
 508         cli->vuid = SVAL(cli->inbuf,smb_uid);
 509
 510         p = smb_buf(cli->inbuf);
 511
 512         blob2 = data_blob(p, SVAL(cli->inbuf, smb_vwv3));
 513
 514         p += blob2.length;
 515         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 516
 517         /* w2k with kerberos doesn't properly null terminate this field */
 518         len = smb_bufrem(cli->inbuf, p);
 519         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), len, 0);
 520
 521         return blob2;
 522 }
 523
 524 #ifdef HAVE_KRB5
 525 /****************************************************************************
 526  Send a extended security session setup blob, returning a reply blob.
 527 ****************************************************************************/
 528
 529 /* The following is calculated from :
 530  * (smb_size-4) = 35
 531  * (smb_wcnt * 2) = 24 (smb_wcnt == 12 in cli_session_setup_blob_send() )
 532  * (strlen("Unix") + 1 + strlen("Samba") + 1) * 2 = 22 (unicode strings at
 533  * end of packet.
 534  */
 535
 536 #define BASE_SESSSETUP_BLOB_PACKET_SIZE (35 + 24 + 22)
 537
 538 static bool cli_session_setup_blob(struct cli_state *cli, DATA_BLOB blob, DATA_BLOB session_key_krb5)
 539 {
 540         int32 remaining = blob.length;
 541         int32 cur = 0;
 542         DATA_BLOB send_blob = data_blob_null;
 543         int32 max_blob_size = 0;
 544         DATA_BLOB receive_blob = data_blob_null;
 545
 546         if (cli->max_xmit < BASE_SESSSETUP_BLOB_PACKET_SIZE + 1) {
 547                 DEBUG(0,("cli_session_setup_blob: cli->max_xmit too small "
 548                         "(was %u, need minimum %u)\n",
 549                         (unsigned int)cli->max_xmit,
 550                         BASE_SESSSETUP_BLOB_PACKET_SIZE));
 551                 cli_set_nt_error(cli, NT_STATUS_INVALID_PARAMETER);
 552                 return False;
 553         }
 554
 555         max_blob_size = cli->max_xmit - BASE_SESSSETUP_BLOB_PACKET_SIZE;
 556
 557         while ( remaining > 0) {
 558                 if (remaining >= max_blob_size) {
 559                         send_blob.length = max_blob_size;
 560                         remaining -= max_blob_size;
 561                 } else {
 562                         DATA_BLOB null_blob = data_blob_null;
 563
 564                         send_blob.length = remaining;
 565                         remaining = 0;
 566
 567                         /* This is the last packet in the sequence - turn signing on. */
 568                         cli_simple_set_signing(cli, session_key_krb5, null_blob);
 569                 }
 570
 571                 send_blob.data =  &blob.data[cur];
 572                 cur += send_blob.length;
 573
 574                 DEBUG(10, ("cli_session_setup_blob: Remaining (%u) sending (%u) current (%u)\n",
 575                         (unsigned int)remaining,
 576                         (unsigned int)send_blob.length,
 577                         (unsigned int)cur ));
 578
 579                 if (!cli_session_setup_blob_send(cli, send_blob)) {
 580                         DEBUG(0, ("cli_session_setup_blob: send failed\n"));
 581                         return False;
 582                 }
 583
 584                 receive_blob = cli_session_setup_blob_receive(cli);
 585                 data_blob_free(&receive_blob);
 586
 587                 if (cli_is_error(cli) &&
 588                                 !NT_STATUS_EQUAL( cli_get_nt_error(cli),
 589                                         NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 590                         DEBUG(0, ("cli_session_setup_blob: receive failed "
 591                                   "(%s)\n", nt_errstr(cli_get_nt_error(cli))));
 592                         cli->vuid = 0;
 593                         return False;
 594                 }
 595         }
 596
 597         return True;
 598 }
 599
 600 /****************************************************************************
 601  Use in-memory credentials cache
 602 ****************************************************************************/
 603
 604 static void use_in_memory_ccache(void) {
 605         setenv(KRB5_ENV_CCNAME, "MEMORY:cliconnect", 1);
 606 }
 607
 608 /****************************************************************************
 609  Do a spnego/kerberos encrypted session setup.
 610 ****************************************************************************/
 611
 612 static ADS_STATUS cli_session_setup_kerberos(struct cli_state *cli, const char *principal, const char *workgroup)
 613 {
 614         DATA_BLOB negTokenTarg;
 615         DATA_BLOB session_key_krb5;
 616         int rc;
 617
 618         DEBUG(2,("Doing kerberos session setup\n"));
 619
 620         /* generate the encapsulated kerberos5 ticket */
 621         rc = spnego_gen_negTokenTarg(principal, 0, &negTokenTarg, &session_key_krb5, 0, NULL);
 622
 623         if (rc) {
 624                 DEBUG(1, ("cli_session_setup_kerberos: spnego_gen_negTokenTarg failed: %s\n",
 625                         error_message(rc)));
 626                 return ADS_ERROR_KRB5(rc);
 627         }
 628
 629 #if 0
 630         file_save("negTokenTarg.dat", negTokenTarg.data, negTokenTarg.length);
 631 #endif
 632
 633         if (!cli_session_setup_blob(cli, negTokenTarg, session_key_krb5)) {
 634                 data_blob_free(&negTokenTarg);
 635                 data_blob_free(&session_key_krb5);
 636                 return ADS_ERROR_NT(cli_nt_error(cli));
 637         }
 638
 639         cli_set_session_key(cli, session_key_krb5);
 640
 641         data_blob_free(&negTokenTarg);
 642         data_blob_free(&session_key_krb5);
 643
 644         if (cli_is_error(cli)) {
 645                 if (NT_STATUS_IS_OK(cli_nt_error(cli))) {
 646                         return ADS_ERROR_NT(NT_STATUS_UNSUCCESSFUL);
 647                 }
 648         }
 649         return ADS_ERROR_NT(cli_nt_error(cli));
 650 }
 651 #endif  /* HAVE_KRB5 */
 652
 653
 654 /****************************************************************************
 655  Do a spnego/NTLMSSP encrypted session setup.
 656 ****************************************************************************/
 657
 658 static NTSTATUS cli_session_setup_ntlmssp(struct cli_state *cli, const char *user,
 659                                           const char *pass, const char *domain)
 660 {
 661         struct ntlmssp_state *ntlmssp_state;
 662         NTSTATUS nt_status;
 663         int turn = 1;
 664         DATA_BLOB msg1;
 665         DATA_BLOB blob = data_blob_null;
 666         DATA_BLOB blob_in = data_blob_null;
 667         DATA_BLOB blob_out = data_blob_null;
 668
 669         cli_temp_set_signing(cli);
 670
 671         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_client_start(&ntlmssp_state))) {
 672                 return nt_status;
 673         }
 674         ntlmssp_want_feature(ntlmssp_state, NTLMSSP_FEATURE_SESSION_KEY);
 675
 676         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(ntlmssp_state, user))) {
 677                 return nt_status;
 678         }
 679         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(ntlmssp_state, domain))) {
 680                 return nt_status;
 681         }
 682         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_password(ntlmssp_state, pass))) {
 683                 return nt_status;
 684         }
 685
 686         do {
 687                 nt_status = ntlmssp_update(ntlmssp_state,
 688                                                   blob_in, &blob_out);
 689                 data_blob_free(&blob_in);
 690                 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED) || NT_STATUS_IS_OK(nt_status)) {
 691                         if (turn == 1) {
 692                                 /* and wrap it in a SPNEGO wrapper */
 693                                 msg1 = gen_negTokenInit(OID_NTLMSSP, blob_out);
 694                         } else {
 695                                 /* wrap it in SPNEGO */
 696                                 msg1 = spnego_gen_auth(blob_out);
 697                         }
 698
 699                         /* now send that blob on its way */
 700                         if (!cli_session_setup_blob_send(cli, msg1)) {
 701                                 DEBUG(3, ("Failed to send NTLMSSP/SPNEGO blob to server!\n"));
 702                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 703                         } else {
 704                                 blob = cli_session_setup_blob_receive(cli);
 705
 706                                 nt_status = cli_nt_error(cli);
 707                                 if (cli_is_error(cli) && NT_STATUS_IS_OK(nt_status)) {
 708                                         if (cli->smb_rw_error == SMB_READ_BAD_SIG) {
 709                                                 nt_status = NT_STATUS_ACCESS_DENIED;
 710                                         } else {
 711                                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 712                                         }
 713                                 }
 714                         }
 715                         data_blob_free(&msg1);
 716                 }
 717
 718                 if (!blob.length) {
 719                         if (NT_STATUS_IS_OK(nt_status)) {
 720                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 721                         }
 722                 } else if ((turn == 1) &&
 723                            NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 724                         DATA_BLOB tmp_blob = data_blob_null;
 725                         /* the server might give us back two challenges */
 726                         if (!spnego_parse_challenge(blob, &blob_in,
 727                                                     &tmp_blob)) {
 728                                 DEBUG(3,("Failed to parse challenges\n"));
 729                                 nt_status = NT_STATUS_INVALID_PARAMETER;
 730                         }
 731                         data_blob_free(&tmp_blob);
 732                 } else {
 733                         if (!spnego_parse_auth_response(blob, nt_status, OID_NTLMSSP,
 734                                                         &blob_in)) {
 735                                 DEBUG(3,("Failed to parse auth response\n"));
 736                                 if (NT_STATUS_IS_OK(nt_status)
 737                                     || NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED))
 738                                         nt_status = NT_STATUS_INVALID_PARAMETER;
 739                         }
 740                 }
 741                 data_blob_free(&blob);
 742                 data_blob_free(&blob_out);
 743                 turn++;
 744         } while (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED));
 745
 746         data_blob_free(&blob_in);
 747
 748         if (NT_STATUS_IS_OK(nt_status)) {
 749
 750                 fstrcpy(cli->server_domain, ntlmssp_state->server_domain);
 751                 cli_set_session_key(cli, ntlmssp_state->session_key);
 752
 753                 if (cli_simple_set_signing(
 754                             cli, ntlmssp_state->session_key, data_blob_null)) {
 755
 756                         /* 'resign' the last message, so we get the right sequence numbers
 757                            for checking the first reply from the server */
 758                         cli_calculate_sign_mac(cli, cli->outbuf);
 759
 760                         if (!cli_check_sign_mac(cli, cli->inbuf)) {
 761                                 nt_status = NT_STATUS_ACCESS_DENIED;
 762                         }
 763                 }
 764         }
 765
 766         /* we have a reference conter on ntlmssp_state, if we are signing
 767            then the state will be kept by the signing engine */
 768
 769         ntlmssp_end(&ntlmssp_state);
 770
 771         if (!NT_STATUS_IS_OK(nt_status)) {
 772                 cli->vuid = 0;
 773         }
 774         return nt_status;
 775 }
 776
 777 /****************************************************************************
 778  Do a spnego encrypted session setup.
 779
 780  user_domain: The shortname of the domain the user/machine is a member of.
 781  dest_realm: The realm we're connecting to, if NULL we use our default realm.
 782 ****************************************************************************/
 783
 784 ADS_STATUS cli_session_setup_spnego(struct cli_state *cli, const char *user,
 785                               const char *pass, const char *user_domain,
 786                               const char * dest_realm)
 787 {
 788         char *principal = NULL;
 789         char *OIDs[ASN1_MAX_OIDS];
 790         int i;
 791         DATA_BLOB blob;
 792         const char *p = NULL;
 793         char *account = NULL;
 794
 795         DEBUG(3,("Doing spnego session setup (blob length=%lu)\n", (unsigned long)cli->secblob.length));
 796
 797         /* the server might not even do spnego */
 798         if (cli->secblob.length <= 16) {
 799                 DEBUG(3,("server didn't supply a full spnego negprot\n"));
 800                 goto ntlmssp;
 801         }
 802
 803 #if 0
 804         file_save("negprot.dat", cli->secblob.data, cli->secblob.length);
 805 #endif
 806
 807         /* there is 16 bytes of GUID before the real spnego packet starts */
 808         blob = data_blob(cli->secblob.data+16, cli->secblob.length-16);
 809
 810         /* The server sent us the first part of the SPNEGO exchange in the
 811          * negprot reply. It is WRONG to depend on the principal sent in the
 812          * negprot reply, but right now we do it. If we don't receive one,
 813          * we try to best guess, then fall back to NTLM.  */
 814         if (!spnego_parse_negTokenInit(blob, OIDs, &principal)) {
 815                 data_blob_free(&blob);
 816                 return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 817         }
 818         data_blob_free(&blob);
 819
 820         /* make sure the server understands kerberos */
 821         for (i=0;OIDs[i];i++) {
 822                 DEBUG(3,("got OID=%s\n", OIDs[i]));
 823                 if (strcmp(OIDs[i], OID_KERBEROS5_OLD) == 0 ||
 824                     strcmp(OIDs[i], OID_KERBEROS5) == 0) {
 825                         cli->got_kerberos_mechanism = True;
 826                 }
 827                 talloc_free(OIDs[i]);
 828         }
 829
 830         DEBUG(3,("got principal=%s\n", principal ? principal : "<null>"));
 831
 832         fstrcpy(cli->user_name, user);
 833
 834 #ifdef HAVE_KRB5
 835         /* If password is set we reauthenticate to kerberos server
 836          * and do not store results */
 837
 838         if (cli->got_kerberos_mechanism && cli->use_kerberos) {
 839                 ADS_STATUS rc;
 840
 841                 if (pass && *pass) {
 842                         int ret;
 843
 844                         use_in_memory_ccache();
 845                         ret = kerberos_kinit_password(user, pass, 0 /* no time correction for now */, NULL);
 846
 847                         if (ret){
 848                                 TALLOC_FREE(principal);
 849                                 DEBUG(0, ("Kinit failed: %s\n", error_message(ret)));
 850                                 if (cli->fallback_after_kerberos)
 851                                         goto ntlmssp;
 852                                 return ADS_ERROR_KRB5(ret);
 853                         }
 854                 }
 855
 856                 /* If we get a bad principal, try to guess it if
 857                    we have a valid host NetBIOS name.
 858                  */
 859                 if (strequal(principal, ADS_IGNORE_PRINCIPAL)) {
 860                         TALLOC_FREE(principal);
 861                 }
 862
 863                 if (principal == NULL &&
 864                         !is_ipaddress(cli->desthost) &&
 865                         !strequal(STAR_SMBSERVER,
 866                                 cli->desthost)) {
 867                         char *realm = NULL;
 868                         char *machine = NULL;
 869                         char *host = NULL;
 870                         DEBUG(3,("cli_session_setup_spnego: got a "
 871                                 "bad server principal, trying to guess ...\n"));
 872
 873                         host = strchr_m(cli->desthost, '.');
 874                         if (host) {
 875                                 machine = SMB_STRNDUP(cli->desthost,
 876                                         host - cli->desthost);
 877                         } else {
 878                                 machine = SMB_STRDUP(cli->desthost);
 879                         }
 880                         if (machine == NULL) {
 881                                 return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
 882                         }
 883
 884                         if (dest_realm) {
 885                                 realm = SMB_STRDUP(dest_realm);
 886                                 strupper_m(realm);
 887                         } else {
 888                                 realm = kerberos_get_default_realm_from_ccache();
 889                         }
 890                         if (realm && *realm) {
 891                                 principal = talloc_asprintf(NULL, "%s$@%s",
 892                                                         machine, realm);
 893                                 if (!principal) {
 894                                         SAFE_FREE(machine);
 895                                         SAFE_FREE(realm);
 896                                         return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
 897                                 }
 898                                 DEBUG(3,("cli_session_setup_spnego: guessed "
 899                                         "server principal=%s\n",
 900                                         principal ? principal : "<null>"));
 901                         }
 902                         SAFE_FREE(machine);
 903                         SAFE_FREE(realm);
 904                 }
 905
 906                 if (principal) {
 907                         rc = cli_session_setup_kerberos(cli, principal,
 908                                 dest_realm);
 909                         if (ADS_ERR_OK(rc) || !cli->fallback_after_kerberos) {
 910                                 TALLOC_FREE(principal);
 911                                 return rc;
 912                         }
 913                 }
 914         }
 915 #endif
 916
 917         TALLOC_FREE(principal);
 918
 919 ntlmssp:
 920
 921         account = talloc_strdup(talloc_tos(), user);
 922         if (!account) {
 923                 return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
 924         }
 925
 926         /* when falling back to ntlmssp while authenticating with a machine
 927          * account strip off the realm - gd */
 928
 929         if ((p = strchr_m(user, '@')) != NULL) {
 930                 account[PTR_DIFF(p,user)] = '\0';
 931         }
 932
 933         return ADS_ERROR_NT(cli_session_setup_ntlmssp(cli, account, pass, user_domain));
 934 }
 935
 936 /****************************************************************************
 937  Send a session setup. The username and workgroup is in UNIX character
 938  format and must be converted to DOS codepage format before sending. If the
 939  password is in plaintext, the same should be done.
 940 ****************************************************************************/
 941
 942 NTSTATUS cli_session_setup(struct cli_state *cli,
 943                            const char *user,
 944                            const char *pass, int passlen,
 945                            const char *ntpass, int ntpasslen,
 946                            const char *workgroup)
 947 {
 948         char *p;
 949         fstring user2;
 950
 951         if (user) {
 952                 fstrcpy(user2, user);
 953         } else {
 954                 user2[0] ='\0';
 955         }
 956
 957         if (!workgroup) {
 958                 workgroup = "";
 959         }
 960
 961         /* allow for workgroups as part of the username */
 962         if ((p=strchr_m(user2,'\\')) || (p=strchr_m(user2,'/')) ||
 963             (p=strchr_m(user2,*lp_winbind_separator()))) {
 964                 *p = 0;
 965                 user = p+1;
 966                 workgroup = user2;
 967         }
 968
 969         if (cli->protocol < PROTOCOL_LANMAN1) {
 970                 return NT_STATUS_OK;
 971         }
 972
 973         /* now work out what sort of session setup we are going to
 974            do. I have split this into separate functions to make the
 975            flow a bit easier to understand (tridge) */
 976
 977         /* if its an older server then we have to use the older request format */
 978
 979         if (cli->protocol < PROTOCOL_NT1) {
 980                 if (!lp_client_lanman_auth() && passlen != 24 && (*pass)) {
 981                         DEBUG(1, ("Server requested LM password but 'client lanman auth'"
 982                                   " is disabled\n"));
 983                         return NT_STATUS_ACCESS_DENIED;
 984                 }
 985
 986                 if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0 &&
 987                     !lp_client_plaintext_auth() && (*pass)) {
 988                         DEBUG(1, ("Server requested plaintext password but "
 989                                   "'client plaintext auth' is disabled\n"));
 990                         return NT_STATUS_ACCESS_DENIED;
 991                 }
 992
 993                 return cli_session_setup_lanman2(cli, user, pass, passlen,
 994                                                  workgroup);
 995         }
 996
 997         /* if no user is supplied then we have to do an anonymous connection.
 998            passwords are ignored */
 999
1000         if (!user || !*user)
1001                 return cli_session_setup_guest(cli);
1002
1003         /* if the server is share level then send a plaintext null
1004            password at this point. The password is sent in the tree
1005            connect */
1006
1007         if ((cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) == 0)
1008                 return cli_session_setup_plaintext(cli, user, "", workgroup);
1009
1010         /* if the server doesn't support encryption then we have to use
1011            plaintext. The second password is ignored */
1012
1013         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0) {
1014                 if (!lp_client_plaintext_auth() && (*pass)) {
1015                         DEBUG(1, ("Server requested plaintext password but "
1016                                   "'client plaintext auth' is disabled\n"));
1017                         return NT_STATUS_ACCESS_DENIED;
1018                 }
1019                 return cli_session_setup_plaintext(cli, user, pass, workgroup);
1020         }
1021
1022         /* if the server supports extended security then use SPNEGO */
1023
1024         if (cli->capabilities & CAP_EXTENDED_SECURITY) {
1025                 ADS_STATUS status = cli_session_setup_spnego(cli, user, pass,
1026                                                              workgroup, NULL);
1027                 if (!ADS_ERR_OK(status)) {
1028                         DEBUG(3, ("SPNEGO login failed: %s\n", ads_errstr(status)));
1029                         return ads_ntstatus(status);
1030                 }
1031         } else {
1032                 NTSTATUS status;
1033
1034                 /* otherwise do a NT1 style session setup */
1035                 status = cli_session_setup_nt1(cli, user, pass, passlen,
1036                                                ntpass, ntpasslen, workgroup);
1037                 if (!NT_STATUS_IS_OK(status)) {
1038                         DEBUG(3,("cli_session_setup: NT1 session setup "
1039                                  "failed: %s\n", nt_errstr(status)));
1040                         return status;
1041                 }
1042         }
1043
1044         if (strstr(cli->server_type, "Samba")) {
1045                 cli->is_samba = True;
1046         }
1047
1048         return NT_STATUS_OK;
1049 }
1050
1051 /****************************************************************************
1052  Send a uloggoff.
1053 *****************************************************************************/
1054
1055 bool cli_ulogoff(struct cli_state *cli)
1056 {
1057         memset(cli->outbuf,'\0',smb_size);
1058         cli_set_message(cli->outbuf,2,0,True);
1059         SCVAL(cli->outbuf,smb_com,SMBulogoffX);
1060         cli_setup_packet(cli);
1061         SSVAL(cli->outbuf,smb_vwv0,0xFF);
1062         SSVAL(cli->outbuf,smb_vwv2,0);  /* no additional info */
1063
1064         cli_send_smb(cli);
1065         if (!cli_receive_smb(cli))
1066                 return False;
1067
1068         if (cli_is_error(cli)) {
1069                 return False;
1070         }
1071
1072         cli->cnum = -1;
1073         return True;
1074 }
1075
1076 /****************************************************************************
1077  Send a tconX.
1078 ****************************************************************************/
1079
1080 bool cli_send_tconX(struct cli_state *cli,
1081                     const char *share, const char *dev, const char *pass, int passlen)
1082 {
1083         fstring fullshare, pword;
1084         char *p;
1085         memset(cli->outbuf,'\0',smb_size);
1086         memset(cli->inbuf,'\0',smb_size);
1087
1088         fstrcpy(cli->share, share);
1089
1090         /* in user level security don't send a password now */
1091         if (cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) {
1092                 passlen = 1;
1093                 pass = "";
1094         } else if (!pass) {
1095                 DEBUG(1, ("Server not using user level security and no password supplied.\n"));
1096                 return False;
1097         }
1098
1099         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) &&
1100             *pass && passlen != 24) {
1101                 if (!lp_client_lanman_auth()) {
1102                         DEBUG(1, ("Server requested LANMAN password "
1103                                   "(share-level security) but "
1104                                   "'client lanman auth' is disabled\n"));
1105                         return False;
1106                 }
1107
1108                 /*
1109                  * Non-encrypted passwords - convert to DOS codepage before encryption.
1110                  */
1111                 passlen = 24;
1112                 SMBencrypt(pass,cli->secblob.data,(uchar *)pword);
1113         } else {
1114                 if((cli->sec_mode & (NEGOTIATE_SECURITY_USER_LEVEL|NEGOTIATE_SECURITY_CHALLENGE_RESPONSE)) == 0) {
1115                         if (!lp_client_plaintext_auth() && (*pass)) {
1116                                 DEBUG(1, ("Server requested plaintext "
1117                                           "password but 'client plaintext "
1118                                           "auth' is disabled\n"));
1119                                 return False;
1120                         }
1121
1122                         /*
1123                          * Non-encrypted passwords - convert to DOS codepage before using.
1124                          */
1125                         passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
1126
1127                 } else {
1128                         if (passlen) {
1129                                 memcpy(pword, pass, passlen);
1130                         }
1131                 }
1132         }
1133
1134         slprintf(fullshare, sizeof(fullshare)-1,
1135                  "\\\\%s\\%s", cli->desthost, share);
1136
1137         cli_set_message(cli->outbuf,4, 0, True);
1138         SCVAL(cli->outbuf,smb_com,SMBtconX);
1139         cli_setup_packet(cli);
1140
1141         SSVAL(cli->outbuf,smb_vwv0,0xFF);
1142         SSVAL(cli->outbuf,smb_vwv2,TCONX_FLAG_EXTENDED_RESPONSE);
1143         SSVAL(cli->outbuf,smb_vwv3,passlen);
1144
1145         p = smb_buf(cli->outbuf);
1146         if (passlen) {
1147                 memcpy(p,pword,passlen);
1148         }
1149         p += passlen;
1150         p += clistr_push(cli, p, fullshare, -1, STR_TERMINATE |STR_UPPER);
1151         p += clistr_push(cli, p, dev, -1, STR_TERMINATE |STR_UPPER | STR_ASCII);
1152
1153         cli_setup_bcc(cli, p);
1154
1155         cli_send_smb(cli);
1156         if (!cli_receive_smb(cli))
1157                 return False;
1158
1159         if (cli_is_error(cli))
1160                 return False;
1161
1162         clistr_pull(cli, cli->dev, smb_buf(cli->inbuf), sizeof(fstring), -1, STR_TERMINATE|STR_ASCII);
1163
1164         if (cli->protocol >= PROTOCOL_NT1 &&
1165             smb_buflen(cli->inbuf) == 3) {
1166                 /* almost certainly win95 - enable bug fixes */
1167                 cli->win95 = True;
1168         }
1169
1170         /* Make sure that we have the optional support 16-bit field.  WCT > 2 */
1171         /* Avoids issues when connecting to Win9x boxes sharing files */
1172
1173         cli->dfsroot = False;
1174         if ( (CVAL(cli->inbuf, smb_wct))>2 && cli->protocol >= PROTOCOL_LANMAN2 )
1175                 cli->dfsroot = (SVAL( cli->inbuf, smb_vwv2 ) & SMB_SHARE_IN_DFS) ? True : False;
1176
1177         cli->cnum = SVAL(cli->inbuf,smb_tid);
1178         return True;
1179 }
1180
1181 /****************************************************************************
1182  Send a tree disconnect.
1183 ****************************************************************************/
1184
1185 bool cli_tdis(struct cli_state *cli)
1186 {
1187         memset(cli->outbuf,'\0',smb_size);
1188         cli_set_message(cli->outbuf,0,0,True);
1189         SCVAL(cli->outbuf,smb_com,SMBtdis);
1190         SSVAL(cli->outbuf,smb_tid,cli->cnum);
1191         cli_setup_packet(cli);
1192
1193         cli_send_smb(cli);
1194         if (!cli_receive_smb(cli))
1195                 return False;
1196
1197         if (cli_is_error(cli)) {
1198                 return False;
1199         }
1200
1201         cli->cnum = -1;
1202         return True;
1203 }
1204
1205 /****************************************************************************
1206  Send a negprot command.
1207 ****************************************************************************/
1208
1209 void cli_negprot_sendsync(struct cli_state *cli)
1210 {
1211         char *p;
1212         int numprots;
1213
1214         if (cli->protocol < PROTOCOL_NT1)
1215                 cli->use_spnego = False;
1216
1217         memset(cli->outbuf,'\0',smb_size);
1218
1219         /* setup the protocol strings */
1220         cli_set_message(cli->outbuf,0,0,True);
1221
1222         p = smb_buf(cli->outbuf);
1223         for (numprots=0; numprots < ARRAY_SIZE(prots); numprots++) {
1224                 if (prots[numprots].prot > cli->protocol) {
1225                         break;
1226                 }
1227                 *p++ = 2;
1228                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1229         }
1230
1231         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1232         cli_setup_bcc(cli, p);
1233         cli_setup_packet(cli);
1234
1235         SCVAL(smb_buf(cli->outbuf),0,2);
1236
1237         cli_send_smb(cli);
1238 }
1239
1240 /****************************************************************************
1241  Send a negprot command.
1242 ****************************************************************************/
1243
1244 NTSTATUS cli_negprot(struct cli_state *cli)
1245 {
1246         char *p;
1247         int numprots;
1248         int plength;
1249
1250         if (cli->protocol < PROTOCOL_NT1)
1251                 cli->use_spnego = False;
1252
1253         memset(cli->outbuf,'\0',smb_size);
1254
1255         plength = 0;
1256
1257         /* setup the protocol strings */
1258         for (numprots=0; numprots < ARRAY_SIZE(prots); numprots++) {
1259                 if (prots[numprots].prot > cli->protocol) {
1260                         break;
1261                 }
1262                 plength += strlen(prots[numprots].name)+2;
1263         }
1264
1265         cli_set_message(cli->outbuf,0,plength,True);
1266
1267         p = smb_buf(cli->outbuf);
1268         for (numprots=0; numprots < ARRAY_SIZE(prots); numprots++) {
1269                 if (prots[numprots].prot > cli->protocol) {
1270                         break;
1271                 }
1272                 *p++ = 2;
1273                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1274         }
1275
1276         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1277         cli_setup_packet(cli);
1278
1279         SCVAL(smb_buf(cli->outbuf),0,2);
1280
1281         cli_send_smb(cli);
1282         if (!cli_receive_smb(cli)) {
1283                 return NT_STATUS_UNEXPECTED_IO_ERROR;
1284         }
1285
1286         show_msg(cli->inbuf);
1287
1288         if (cli_is_error(cli)) {
1289                 return cli_nt_error(cli);
1290         }
1291
1292         if ((int)SVAL(cli->inbuf,smb_vwv0) >= numprots) {
1293                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1294         }
1295
1296         cli->protocol = prots[SVAL(cli->inbuf,smb_vwv0)].prot;
1297
1298         if ((cli->protocol < PROTOCOL_NT1) && cli->sign_info.mandatory_signing) {
1299                 DEBUG(0,("cli_negprot: SMB signing is mandatory and the selected protocol level doesn't support it.\n"));
1300                 return NT_STATUS_ACCESS_DENIED;
1301         }
1302
1303         if (cli->protocol >= PROTOCOL_NT1) {
1304                 struct timespec ts;
1305                 /* NT protocol */
1306                 cli->sec_mode = CVAL(cli->inbuf,smb_vwv1);
1307                 cli->max_mux = SVAL(cli->inbuf, smb_vwv1+1);
1308                 cli->max_xmit = IVAL(cli->inbuf,smb_vwv3+1);
1309                 cli->sesskey = IVAL(cli->inbuf,smb_vwv7+1);
1310                 cli->serverzone = SVALS(cli->inbuf,smb_vwv15+1);
1311                 cli->serverzone *= 60;
1312                 /* this time arrives in real GMT */
1313                 ts = interpret_long_date(cli->inbuf+smb_vwv11+1);
1314                 cli->servertime = ts.tv_sec;
1315                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1316                 cli->capabilities = IVAL(cli->inbuf,smb_vwv9+1);
1317                 if (cli->capabilities & CAP_RAW_MODE) {
1318                         cli->readbraw_supported = True;
1319                         cli->writebraw_supported = True;
1320                 }
1321                 /* work out if they sent us a workgroup */
1322                 if (!(cli->capabilities & CAP_EXTENDED_SECURITY) &&
1323                     smb_buflen(cli->inbuf) > 8) {
1324                         clistr_pull(cli, cli->server_domain,
1325                                     smb_buf(cli->inbuf)+8, sizeof(cli->server_domain),
1326                                     smb_buflen(cli->inbuf)-8, STR_UNICODE|STR_NOALIGN);
1327                 }
1328
1329                 /*
1330                  * As signing is slow we only turn it on if either the client or
1331                  * the server require it. JRA.
1332                  */
1333
1334                 if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
1335                         /* Fail if server says signing is mandatory and we don't want to support it. */
1336                         if (!cli->sign_info.allow_smb_signing) {
1337                                 DEBUG(0,("cli_negprot: SMB signing is mandatory and we have disabled it.\n"));
1338                                 return NT_STATUS_ACCESS_DENIED;
1339                         }
1340                         cli->sign_info.negotiated_smb_signing = True;
1341                         cli->sign_info.mandatory_signing = True;
1342                 } else if (cli->sign_info.mandatory_signing && cli->sign_info.allow_smb_signing) {
1343                         /* Fail if client says signing is mandatory and the server doesn't support it. */
1344                         if (!(cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED)) {
1345                                 DEBUG(1,("cli_negprot: SMB signing is mandatory and the server doesn't support it.\n"));
1346                                 return NT_STATUS_ACCESS_DENIED;
1347                         }
1348                         cli->sign_info.negotiated_smb_signing = True;
1349                         cli->sign_info.mandatory_signing = True;
1350                 } else if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
1351                         cli->sign_info.negotiated_smb_signing = True;
1352                 }
1353
1354                 if (cli->capabilities & (CAP_LARGE_READX|CAP_LARGE_WRITEX)) {
1355                         SAFE_FREE(cli->outbuf);
1356                         SAFE_FREE(cli->inbuf);
1357                         cli->outbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+LARGE_WRITEX_HDR_SIZE+SAFETY_MARGIN);
1358                         cli->inbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+LARGE_WRITEX_HDR_SIZE+SAFETY_MARGIN);
1359                         cli->bufsize = CLI_SAMBA_MAX_LARGE_READX_SIZE + LARGE_WRITEX_HDR_SIZE;
1360                 }
1361
1362         } else if (cli->protocol >= PROTOCOL_LANMAN1) {
1363                 cli->use_spnego = False;
1364                 cli->sec_mode = SVAL(cli->inbuf,smb_vwv1);
1365                 cli->max_xmit = SVAL(cli->inbuf,smb_vwv2);
1366                 cli->max_mux = SVAL(cli->inbuf, smb_vwv3);
1367                 cli->sesskey = IVAL(cli->inbuf,smb_vwv6);
1368                 cli->serverzone = SVALS(cli->inbuf,smb_vwv10);
1369                 cli->serverzone *= 60;
1370                 /* this time is converted to GMT by make_unix_date */
1371                 cli->servertime = cli_make_unix_date(cli,cli->inbuf+smb_vwv8);
1372                 cli->readbraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x1) != 0);
1373                 cli->writebraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x2) != 0);
1374                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1375         } else {
1376                 /* the old core protocol */
1377                 cli->use_spnego = False;
1378                 cli->sec_mode = 0;
1379                 cli->serverzone = get_time_zone(time(NULL));
1380         }
1381
1382         cli->max_xmit = MIN(cli->max_xmit, CLI_BUFFER_SIZE);
1383
1384         /* a way to force ascii SMB */
1385         if (getenv("CLI_FORCE_ASCII"))
1386                 cli->capabilities &= ~CAP_UNICODE;
1387
1388         return NT_STATUS_OK;
1389 }
1390
1391 /****************************************************************************
1392  Send a session request. See rfc1002.txt 4.3 and 4.3.2.
1393 ****************************************************************************/
1394
1395 bool cli_session_request(struct cli_state *cli,
1396                          struct nmb_name *calling, struct nmb_name *called)
1397 {
1398         char *p;
1399         int len = 4;
1400
1401         /* 445 doesn't have session request */
1402         if (cli->port == 445)
1403                 return True;
1404
1405         memcpy(&(cli->calling), calling, sizeof(*calling));
1406         memcpy(&(cli->called ), called , sizeof(*called ));
1407
1408         /* put in the destination name */
1409         p = cli->outbuf+len;
1410         name_mangle(cli->called .name, p, cli->called .name_type);
1411         len += name_len(p);
1412
1413         /* and my name */
1414         p = cli->outbuf+len;
1415         name_mangle(cli->calling.name, p, cli->calling.name_type);
1416         len += name_len(p);
1417
1418         /* send a session request (RFC 1002) */
1419         /* setup the packet length
1420          * Remove four bytes from the length count, since the length
1421          * field in the NBT Session Service header counts the number
1422          * of bytes which follow.  The cli_send_smb() function knows
1423          * about this and accounts for those four bytes.
1424          * CRH.
1425          */
1426         len -= 4;
1427         _smb_setlen(cli->outbuf,len);
1428         SCVAL(cli->outbuf,0,0x81);
1429
1430         cli_send_smb(cli);
1431         DEBUG(5,("Sent session request\n"));
1432
1433         if (!cli_receive_smb(cli))
1434                 return False;
1435
1436         if (CVAL(cli->inbuf,0) == 0x84) {
1437                 /* C. Hoch  9/14/95 Start */
1438                 /* For information, here is the response structure.
1439                  * We do the byte-twiddling to for portability.
1440                 struct RetargetResponse{
1441                 unsigned char type;
1442                 unsigned char flags;
1443                 int16 length;
1444                 int32 ip_addr;
1445                 int16 port;
1446                 };
1447                 */
1448                 uint16_t port = (CVAL(cli->inbuf,8)<<8)+CVAL(cli->inbuf,9);
1449                 struct in_addr dest_ip;
1450
1451                 /* SESSION RETARGET */
1452                 putip((char *)&dest_ip,cli->inbuf+4);
1453                 in_addr_to_sockaddr_storage(&cli->dest_ss, dest_ip);
1454
1455                 cli->fd = open_socket_out(SOCK_STREAM,
1456                                 &cli->dest_ss,
1457                                 port,
1458                                 LONG_CONNECT_TIMEOUT);
1459                 if (cli->fd == -1)
1460                         return False;
1461
1462                 DEBUG(3,("Retargeted\n"));
1463
1464                 set_socket_options(cli->fd, lp_socket_options());
1465
1466                 /* Try again */
1467                 {
1468                         static int depth;
1469                         bool ret;
1470                         if (depth > 4) {
1471                                 DEBUG(0,("Retarget recursion - failing\n"));
1472                                 return False;
1473                         }
1474                         depth++;
1475                         ret = cli_session_request(cli, calling, called);
1476                         depth--;
1477                         return ret;
1478                 }
1479         } /* C. Hoch 9/14/95 End */
1480
1481         if (CVAL(cli->inbuf,0) != 0x82) {
1482                 /* This is the wrong place to put the error... JRA. */
1483                 cli->rap_error = CVAL(cli->inbuf,4);
1484                 return False;
1485         }
1486         return(True);
1487 }
1488
1489 /****************************************************************************
1490  Open the client sockets.
1491 ****************************************************************************/
1492
1493 NTSTATUS cli_connect(struct cli_state *cli,
1494                 const char *host,
1495                 struct sockaddr_storage *dest_ss)
1496
1497 {
1498         int name_type = 0x20;
1499         TALLOC_CTX *frame = talloc_stackframe();
1500         unsigned int num_addrs = 0;
1501         unsigned int i = 0;
1502         struct sockaddr_storage *ss_arr = NULL;
1503         char *p = NULL;
1504
1505         /* reasonable default hostname */
1506         if (!host) {
1507                 host = STAR_SMBSERVER;
1508         }
1509
1510         fstrcpy(cli->desthost, host);
1511
1512         /* allow hostnames of the form NAME#xx and do a netbios lookup */
1513         if ((p = strchr(cli->desthost, '#'))) {
1514                 name_type = strtol(p+1, NULL, 16);
1515                 *p = 0;
1516         }
1517
1518         if (!dest_ss || is_zero_addr((struct sockaddr *)dest_ss)) {
1519                 NTSTATUS status =resolve_name_list(frame,
1520                                         cli->desthost,
1521                                         name_type,
1522                                         &ss_arr,
1523                                         &num_addrs);
1524                 if (!NT_STATUS_IS_OK(status)) {
1525                         TALLOC_FREE(frame);
1526                         return NT_STATUS_BAD_NETWORK_NAME;
1527                 }
1528         } else {
1529                 num_addrs = 1;
1530                 ss_arr = TALLOC_P(frame, struct sockaddr_storage);
1531                 if (!ss_arr) {
1532                         TALLOC_FREE(frame);
1533                         return NT_STATUS_NO_MEMORY;
1534                 }
1535                 *ss_arr = *dest_ss;
1536         }
1537
1538         for (i = 0; i < num_addrs; i++) {
1539                 cli->dest_ss = ss_arr[i];
1540                 if (getenv("LIBSMB_PROG")) {
1541                         cli->fd = sock_exec(getenv("LIBSMB_PROG"));
1542                 } else {
1543                         /* try 445 first, then 139 */
1544                         uint16_t port = cli->port?cli->port:445;
1545                         cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ss,
1546                                                   port, cli->timeout);
1547                         if (cli->fd == -1 && cli->port == 0) {
1548                                 port = 139;
1549                                 cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ss,
1550                                                           port, cli->timeout);
1551                         }
1552                         if (cli->fd != -1) {
1553                                 cli->port = port;
1554                         }
1555                 }
1556                 if (cli->fd == -1) {
1557                         char addr[INET6_ADDRSTRLEN];
1558                         print_sockaddr(addr, sizeof(addr), &ss_arr[i]);
1559                         DEBUG(2,("Error connecting to %s (%s)\n",
1560                                  dest_ss?addr:host,strerror(errno)));
1561                 } else {
1562                         /* Exit from loop on first connection. */
1563                         break;
1564                 }
1565         }
1566
1567         if (cli->fd == -1) {
1568                 TALLOC_FREE(frame);
1569                 return map_nt_error_from_unix(errno);
1570         }
1571
1572         if (dest_ss) {
1573                 *dest_ss = cli->dest_ss;
1574         }
1575
1576         set_socket_options(cli->fd, lp_socket_options());
1577
1578         TALLOC_FREE(frame);
1579         return NT_STATUS_OK;
1580 }
1581
1582 /**
1583    establishes a connection to after the negprot.
1584    @param output_cli A fully initialised cli structure, non-null only on success
1585    @param dest_host The netbios name of the remote host
1586    @param dest_ss (optional) The the destination IP, NULL for name based lookup
1587    @param port (optional) The destination port (0 for default)
1588    @param retry bool. Did this connection fail with a retryable error ?
1589
1590 */
1591 NTSTATUS cli_start_connection(struct cli_state **output_cli,
1592                               const char *my_name,
1593                               const char *dest_host,
1594                               struct sockaddr_storage *dest_ss, int port,
1595                               int signing_state, int flags,
1596                               bool *retry)
1597 {
1598         NTSTATUS nt_status;
1599         struct nmb_name calling;
1600         struct nmb_name called;
1601         struct cli_state *cli;
1602         struct sockaddr_storage ss;
1603
1604         if (retry)
1605                 *retry = False;
1606
1607         if (!my_name)
1608                 my_name = global_myname();
1609
1610         if (!(cli = cli_initialise())) {
1611                 return NT_STATUS_NO_MEMORY;
1612         }
1613
1614         make_nmb_name(&calling, my_name, 0x0);
1615         make_nmb_name(&called , dest_host, 0x20);
1616
1617         if (cli_set_port(cli, port) != port) {
1618                 cli_shutdown(cli);
1619                 return NT_STATUS_UNSUCCESSFUL;
1620         }
1621
1622         cli_set_timeout(cli, 10000); /* 10 seconds. */
1623
1624         if (dest_ss) {
1625                 ss = *dest_ss;
1626         } else {
1627                 zero_sockaddr(&ss);
1628         }
1629
1630 again:
1631
1632         DEBUG(3,("Connecting to host=%s\n", dest_host));
1633
1634         nt_status = cli_connect(cli, dest_host, &ss);
1635         if (!NT_STATUS_IS_OK(nt_status)) {
1636                 char addr[INET6_ADDRSTRLEN];
1637                 print_sockaddr(addr, sizeof(addr), &ss);
1638                 DEBUG(1,("cli_start_connection: failed to connect to %s (%s). Error %s\n",
1639                          nmb_namestr(&called), addr, nt_errstr(nt_status) ));
1640                 cli_shutdown(cli);
1641                 return nt_status;
1642         }
1643
1644         if (retry)
1645                 *retry = True;
1646
1647         if (!cli_session_request(cli, &calling, &called)) {
1648                 char *p;
1649                 DEBUG(1,("session request to %s failed (%s)\n",
1650                          called.name, cli_errstr(cli)));
1651                 if ((p=strchr(called.name, '.')) && !is_ipaddress(called.name)) {
1652                         *p = 0;
1653                         goto again;
1654                 }
1655                 if (strcmp(called.name, STAR_SMBSERVER)) {
1656                         make_nmb_name(&called , STAR_SMBSERVER, 0x20);
1657                         goto again;
1658                 }
1659                 return NT_STATUS_BAD_NETWORK_NAME;
1660         }
1661
1662         cli_setup_signing_state(cli, signing_state);
1663
1664         if (flags & CLI_FULL_CONNECTION_DONT_SPNEGO)
1665                 cli->use_spnego = False;
1666         else if (flags & CLI_FULL_CONNECTION_USE_KERBEROS)
1667                 cli->use_kerberos = True;
1668
1669         if ((flags & CLI_FULL_CONNECTION_FALLBACK_AFTER_KERBEROS) &&
1670              cli->use_kerberos) {
1671                 cli->fallback_after_kerberos = true;
1672         }
1673
1674         nt_status = cli_negprot(cli);
1675         if (!NT_STATUS_IS_OK(nt_status)) {
1676                 DEBUG(1, ("failed negprot: %s\n", nt_errstr(nt_status)));
1677                 cli_shutdown(cli);
1678                 return nt_status;
1679         }
1680
1681         *output_cli = cli;
1682         return NT_STATUS_OK;
1683 }
1684
1685
1686 /**
1687    establishes a connection right up to doing tconX, password specified.
1688    @param output_cli A fully initialised cli structure, non-null only on success
1689    @param dest_host The netbios name of the remote host
1690    @param dest_ip (optional) The the destination IP, NULL for name based lookup
1691    @param port (optional) The destination port (0 for default)
1692    @param service (optional) The share to make the connection to.  Should be 'unqualified' in any way.
1693    @param service_type The 'type' of serivice.
1694    @param user Username, unix string
1695    @param domain User's domain
1696    @param password User's password, unencrypted unix string.
1697    @param retry bool. Did this connection fail with a retryable error ?
1698 */
1699
1700 NTSTATUS cli_full_connection(struct cli_state **output_cli,
1701                              const char *my_name,
1702                              const char *dest_host,
1703                              struct sockaddr_storage *dest_ss, int port,
1704                              const char *service, const char *service_type,
1705                              const char *user, const char *domain,
1706                              const char *password, int flags,
1707                              int signing_state,
1708                              bool *retry)
1709 {
1710         NTSTATUS nt_status;
1711         struct cli_state *cli = NULL;
1712         int pw_len = password ? strlen(password)+1 : 0;
1713
1714         *output_cli = NULL;
1715
1716         if (password == NULL) {
1717                 password = "";
1718         }
1719
1720         nt_status = cli_start_connection(&cli, my_name, dest_host,
1721                                          dest_ss, port, signing_state,
1722                                          flags, retry);
1723
1724         if (!NT_STATUS_IS_OK(nt_status)) {
1725                 return nt_status;
1726         }
1727
1728         nt_status = cli_session_setup(cli, user, password, pw_len, password,
1729                                       pw_len, domain);
1730         if (!NT_STATUS_IS_OK(nt_status)) {
1731
1732                 if (!(flags & CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK)) {
1733                         DEBUG(1,("failed session setup with %s\n",
1734                                  nt_errstr(nt_status)));
1735                         cli_shutdown(cli);
1736                         return nt_status;
1737                 }
1738
1739                 nt_status = cli_session_setup(cli, "", "", 0, "", 0, domain);
1740                 if (!NT_STATUS_IS_OK(nt_status)) {
1741                         DEBUG(1,("anonymous failed session setup with %s\n",
1742                                  nt_errstr(nt_status)));
1743                         cli_shutdown(cli);
1744                         return nt_status;
1745                 }
1746         }
1747
1748         if (service) {
1749                 if (!cli_send_tconX(cli, service, service_type, password, pw_len)) {
1750                         nt_status = cli_nt_error(cli);
1751                         DEBUG(1,("failed tcon_X with %s\n", nt_errstr(nt_status)));
1752                         cli_shutdown(cli);
1753                         if (NT_STATUS_IS_OK(nt_status)) {
1754                                 nt_status = NT_STATUS_UNSUCCESSFUL;
1755                         }
1756                         return nt_status;
1757                 }
1758         }
1759
1760         cli_init_creds(cli, user, domain, password);
1761
1762         *output_cli = cli;
1763         return NT_STATUS_OK;
1764 }
1765
1766 /****************************************************************************
1767  Attempt a NetBIOS session request, falling back to *SMBSERVER if needed.
1768 ****************************************************************************/
1769
1770 bool attempt_netbios_session_request(struct cli_state **ppcli, const char *srchost, const char *desthost,
1771                                      struct sockaddr_storage *pdest_ss)
1772 {
1773         struct nmb_name calling, called;
1774
1775         make_nmb_name(&calling, srchost, 0x0);
1776
1777         /*
1778          * If the called name is an IP address
1779          * then use *SMBSERVER immediately.
1780          */
1781
1782         if(is_ipaddress(desthost)) {
1783                 make_nmb_name(&called, STAR_SMBSERVER, 0x20);
1784         } else {
1785                 make_nmb_name(&called, desthost, 0x20);
1786         }
1787
1788         if (!cli_session_request(*ppcli, &calling, &called)) {
1789                 NTSTATUS status;
1790                 struct nmb_name smbservername;
1791
1792                 make_nmb_name(&smbservername, STAR_SMBSERVER, 0x20);
1793
1794                 /*
1795                  * If the name wasn't *SMBSERVER then
1796                  * try with *SMBSERVER if the first name fails.
1797                  */
1798
1799                 if (nmb_name_equal(&called, &smbservername)) {
1800
1801                         /*
1802                          * The name used was *SMBSERVER, don't bother with another name.
1803                          */
1804
1805                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for name *SMBSERVER \
1806 with error %s.\n", desthost, cli_errstr(*ppcli) ));
1807                         return False;
1808                 }
1809
1810                 /* Try again... */
1811                 cli_shutdown(*ppcli);
1812
1813                 *ppcli = cli_initialise();
1814                 if (!*ppcli) {
1815                         /* Out of memory... */
1816                         return False;
1817                 }
1818
1819                 status = cli_connect(*ppcli, desthost, pdest_ss);
1820                 if (!NT_STATUS_IS_OK(status) ||
1821                                 !cli_session_request(*ppcli, &calling, &smbservername)) {
1822                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for \
1823 name *SMBSERVER with error %s\n", desthost, cli_errstr(*ppcli) ));
1824                         return False;
1825                 }
1826         }
1827
1828         return True;
1829 }
1830
1831 /****************************************************************************
1832  Send an old style tcon.
1833 ****************************************************************************/
1834 NTSTATUS cli_raw_tcon(struct cli_state *cli,
1835                       const char *service, const char *pass, const char *dev,
1836                       uint16 *max_xmit, uint16 *tid)
1837 {
1838         char *p;
1839
1840         if (!lp_client_plaintext_auth() && (*pass)) {
1841                 DEBUG(1, ("Server requested plaintext password but 'client "
1842                           "plaintext auth' is disabled\n"));
1843                 return NT_STATUS_ACCESS_DENIED;
1844         }
1845
1846         memset(cli->outbuf,'\0',smb_size);
1847         memset(cli->inbuf,'\0',smb_size);
1848
1849         cli_set_message(cli->outbuf, 0, 0, True);
1850         SCVAL(cli->outbuf,smb_com,SMBtcon);
1851         cli_setup_packet(cli);
1852
1853         p = smb_buf(cli->outbuf);
1854         *p++ = 4; p += clistr_push(cli, p, service, -1, STR_TERMINATE | STR_NOALIGN);
1855         *p++ = 4; p += clistr_push(cli, p, pass, -1, STR_TERMINATE | STR_NOALIGN);
1856         *p++ = 4; p += clistr_push(cli, p, dev, -1, STR_TERMINATE | STR_NOALIGN);
1857
1858         cli_setup_bcc(cli, p);
1859
1860         cli_send_smb(cli);
1861         if (!cli_receive_smb(cli)) {
1862                 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
1863         }
1864
1865         if (cli_is_error(cli)) {
1866                 return cli_nt_error(cli);
1867         }
1868
1869         *max_xmit = SVAL(cli->inbuf, smb_vwv0);
1870         *tid = SVAL(cli->inbuf, smb_vwv1);
1871
1872         return NT_STATUS_OK;
1873 }
1874
1875 /* Return a cli_state pointing at the IPC$ share for the given server */
1876
1877 struct cli_state *get_ipc_connect(char *server,
1878                                 struct sockaddr_storage *server_ss,
1879                                 const struct user_auth_info *user_info)
1880 {
1881         struct cli_state *cli;
1882         NTSTATUS nt_status;
1883         uint32_t flags = CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK;
1884
1885         if (user_info->use_kerberos) {
1886                 flags |= CLI_FULL_CONNECTION_USE_KERBEROS;
1887         }
1888
1889         nt_status = cli_full_connection(&cli, NULL, server, server_ss, 0, "IPC$", "IPC",
1890                                         user_info->username ? user_info->username : "",
1891                                         lp_workgroup(),
1892                                         user_info->password ? user_info->password : "",
1893                                         flags,
1894                                         Undefined, NULL);
1895
1896         if (NT_STATUS_IS_OK(nt_status)) {
1897                 return cli;
1898         } else if (is_ipaddress(server)) {
1899             /* windows 9* needs a correct NMB name for connections */
1900             fstring remote_name;
1901
1902             if (name_status_find("*", 0, 0, server_ss, remote_name)) {
1903                 cli = get_ipc_connect(remote_name, server_ss, user_info);
1904                 if (cli)
1905                     return cli;
1906             }
1907         }
1908         return NULL;
1909 }
1910
1911 /*
1912  * Given the IP address of a master browser on the network, return its
1913  * workgroup and connect to it.
1914  *
1915  * This function is provided to allow additional processing beyond what
1916  * get_ipc_connect_master_ip_bcast() does, e.g. to retrieve the list of master
1917  * browsers and obtain each master browsers' list of domains (in case the
1918  * first master browser is recently on the network and has not yet
1919  * synchronized with other master browsers and therefore does not yet have the
1920  * entire network browse list)
1921  */
1922
1923 struct cli_state *get_ipc_connect_master_ip(TALLOC_CTX *ctx,
1924                                 struct ip_service *mb_ip,
1925                                 const struct user_auth_info *user_info,
1926                                 char **pp_workgroup_out)
1927 {
1928         char addr[INET6_ADDRSTRLEN];
1929         fstring name;
1930         struct cli_state *cli;
1931         struct sockaddr_storage server_ss;
1932
1933         *pp_workgroup_out = NULL;
1934
1935         print_sockaddr(addr, sizeof(addr), &mb_ip->ss);
1936         DEBUG(99, ("Looking up name of master browser %s\n",
1937                    addr));
1938
1939         /*
1940          * Do a name status query to find out the name of the master browser.
1941          * We use <01><02>__MSBROWSE__<02>#01 if *#00 fails because a domain
1942          * master browser will not respond to a wildcard query (or, at least,
1943          * an NT4 server acting as the domain master browser will not).
1944          *
1945          * We might be able to use ONLY the query on MSBROWSE, but that's not
1946          * yet been tested with all Windows versions, so until it is, leave
1947          * the original wildcard query as the first choice and fall back to
1948          * MSBROWSE if the wildcard query fails.
1949          */
1950         if (!name_status_find("*", 0, 0x1d, &mb_ip->ss, name) &&
1951             !name_status_find(MSBROWSE, 1, 0x1d, &mb_ip->ss, name)) {
1952
1953                 DEBUG(99, ("Could not retrieve name status for %s\n",
1954                            addr));
1955                 return NULL;
1956         }
1957
1958         if (!find_master_ip(name, &server_ss)) {
1959                 DEBUG(99, ("Could not find master ip for %s\n", name));
1960                 return NULL;
1961         }
1962
1963         *pp_workgroup_out = talloc_strdup(ctx, name);
1964
1965         DEBUG(4, ("found master browser %s, %s\n", name, addr));
1966
1967         print_sockaddr(addr, sizeof(addr), &server_ss);
1968         cli = get_ipc_connect(addr, &server_ss, user_info);
1969
1970         return cli;
1971 }
1972
1973 /*
1974  * Return the IP address and workgroup of a master browser on the network, and
1975  * connect to it.
1976  */
1977
1978 struct cli_state *get_ipc_connect_master_ip_bcast(TALLOC_CTX *ctx,
1979                                         const struct user_auth_info *user_info,
1980                                         char **pp_workgroup_out)
1981 {
1982         struct ip_service *ip_list;
1983         struct cli_state *cli;
1984         int i, count;
1985
1986         *pp_workgroup_out = NULL;
1987
1988         DEBUG(99, ("Do broadcast lookup for workgroups on local network\n"));
1989
1990         /* Go looking for workgroups by broadcasting on the local network */
1991
1992         if (!NT_STATUS_IS_OK(name_resolve_bcast(MSBROWSE, 1, &ip_list,
1993                                                 &count))) {
1994                 DEBUG(99, ("No master browsers responded\n"));
1995                 return False;
1996         }
1997
1998         for (i = 0; i < count; i++) {
1999                 char addr[INET6_ADDRSTRLEN];
2000                 print_sockaddr(addr, sizeof(addr), &ip_list[i].ss);
2001                 DEBUG(99, ("Found master browser %s\n", addr));
2002
2003                 cli = get_ipc_connect_master_ip(ctx, &ip_list[i],
2004                                 user_info, pp_workgroup_out);
2005                 if (cli)
2006                         return(cli);
2007         }
2008
2009         return NULL;
2010 }