source3/auth/auth_sam.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password and authentication handling
   4    Copyright (C) Andrew Tridgell              1992-2000
   5    Copyright (C) Luke Kenneth Casson Leighton 1996-2000
   6    Copyright (C) Andrew Bartlett              2001
   7    Copyright (C) Gerald Carter                2003
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_AUTH
  28
  29 /****************************************************************************
  30  Core of smb password checking routine.
  31 ****************************************************************************/
  32
  33 static BOOL smb_pwd_check_ntlmv1(const DATA_BLOB *nt_response,
  34                                  const uchar *part_passwd,
  35                                  const DATA_BLOB *sec_blob,
  36                                  DATA_BLOB *user_sess_key)
  37 {
  38         /* Finish the encryption of part_passwd. */
  39         uchar p24[24];
  40
  41         if (part_passwd == NULL) {
  42                 DEBUG(10,("No password set - DISALLOWING access\n"));
  43                 /* No password set - always false ! */
  44                 return False;
  45         }
  46
  47         if (sec_blob->length != 8) {
  48                 DEBUG(0, ("smb_pwd_check_ntlmv1: incorrect challenge size (%lu)\n", (unsigned long)sec_blob->length));
  49                 return False;
  50         }
  51
  52         if (nt_response->length != 24) {
  53                 DEBUG(0, ("smb_pwd_check_ntlmv1: incorrect password length (%lu)\n", (unsigned long)nt_response->length));
  54                 return False;
  55         }
  56
  57         SMBOWFencrypt(part_passwd, sec_blob->data, p24);
  58         if (user_sess_key != NULL) {
  59                 *user_sess_key = data_blob(NULL, 16);
  60                 SMBsesskeygen_ntv1(part_passwd, NULL, user_sess_key->data);
  61         }
  62
  63
  64
  65 #if DEBUG_PASSWORD
  66         DEBUG(100,("Part password (P16) was |\n"));
  67         dump_data(100, part_passwd, 16);
  68         DEBUGADD(100,("Password from client was |\n"));
  69         dump_data(100, nt_response->data, nt_response->length);
  70         DEBUGADD(100,("Given challenge was |\n"));
  71         dump_data(100, sec_blob->data, sec_blob->length);
  72         DEBUGADD(100,("Value from encryption was |\n"));
  73         dump_data(100, p24, 24);
  74 #endif
  75   return (memcmp(p24, nt_response->data, 24) == 0);
  76 }
  77
  78 /****************************************************************************
  79  Core of smb password checking routine. (NTLMv2, LMv2)
  80  Note:  The same code works with both NTLMv2 and LMv2.
  81 ****************************************************************************/
  82
  83 static BOOL smb_pwd_check_ntlmv2(const DATA_BLOB *ntv2_response,
  84                                  const uchar *part_passwd,
  85                                  const DATA_BLOB *sec_blob,
  86                                  const char *user, const char *domain,
  87                                  DATA_BLOB *user_sess_key)
  88 {
  89         /* Finish the encryption of part_passwd. */
  90         uchar kr[16];
  91         uchar value_from_encryption[16];
  92         uchar client_response[16];
  93         DATA_BLOB client_key_data;
  94
  95         if (part_passwd == NULL) {
  96                 DEBUG(10,("No password set - DISALLOWING access\n"));
  97                 /* No password set - always False */
  98                 return False;
  99         }
 100
 101         if (ntv2_response->length < 24) {
 102                 /* We MUST have more than 16 bytes, or the stuff below will go
 103                    crazy.  No known implementation sends less than the 24 bytes
 104                    for LMv2, let alone NTLMv2. */
 105                 DEBUG(0, ("smb_pwd_check_ntlmv2: incorrect password length (%lu)\n",
 106                           (unsigned long)ntv2_response->length));
 107                 return False;
 108         }
 109
 110         client_key_data = data_blob(ntv2_response->data+16, ntv2_response->length-16);
 111         /*
 112            todo:  should we be checking this for anything?  We can't for LMv2,
 113            but for NTLMv2 it is meant to contain the current time etc.
 114         */
 115
 116         memcpy(client_response, ntv2_response->data, sizeof(client_response));
 117
 118         if (!ntv2_owf_gen(part_passwd, user, domain, kr)) {
 119                 return False;
 120         }
 121
 122         SMBOWFencrypt_ntv2(kr, sec_blob, &client_key_data, value_from_encryption);
 123         if (user_sess_key != NULL) {
 124                 *user_sess_key = data_blob(NULL, 16);
 125                 SMBsesskeygen_ntv2(kr, value_from_encryption, user_sess_key->data);
 126         }
 127
 128 #if DEBUG_PASSWORD
 129         DEBUG(100,("Part password (P16) was |\n"));
 130         dump_data(100, part_passwd, 16);
 131         DEBUGADD(100,("Password from client was |\n"));
 132         dump_data(100, ntv2_response->data, ntv2_response->length);
 133         DEBUGADD(100,("Variable data from client was |\n"));
 134         dump_data(100, client_key_data.data, client_key_data.length);
 135         DEBUGADD(100,("Given challenge was |\n"));
 136         dump_data(100, sec_blob->data, sec_blob->length);
 137         DEBUGADD(100,("Value from encryption was |\n"));
 138         dump_data(100, value_from_encryption, 16);
 139 #endif
 140         data_blob_clear_free(&client_key_data);
 141         return (memcmp(value_from_encryption, client_response, 16) == 0);
 142 }
 143
 144 /**
 145  * Check a challenge-response password against the value of the NT or
 146  * LM password hash.
 147  *
 148  * @param mem_ctx talloc context
 149  * @param challenge 8-byte challenge.  If all zero, forces plaintext comparison
 150  * @param nt_response 'unicode' NT response to the challenge, or unicode password
 151  * @param lm_response ASCII or LANMAN response to the challenge, or password in DOS code page
 152  * @param username internal Samba username, for log messages
 153  * @param client_username username the client used
 154  * @param client_domain domain name the client used (may be mapped)
 155  * @param nt_pw MD4 unicode password from our passdb or similar
 156  * @param lm_pw LANMAN ASCII password from our passdb or similar
 157  * @param user_sess_key User session key
 158  * @param lm_sess_key LM session key (first 8 bytes of the LM hash)
 159  */
 160
 161 static NTSTATUS ntlm_password_check(TALLOC_CTX *mem_ctx,
 162                                     const DATA_BLOB *challenge,
 163                                     const DATA_BLOB *lm_response,
 164                                     const DATA_BLOB *nt_response,
 165                                     const char *username,
 166                                     const char *client_username,
 167                                     const char *client_domain,
 168                                     const uint8 *lm_pw, const uint8 *nt_pw,
 169                                     DATA_BLOB *user_sess_key,
 170                                     DATA_BLOB *lm_sess_key)
 171 {
 172         static const unsigned char zeros[8];
 173         if (nt_pw == NULL) {
 174                 DEBUG(3,("sam_password_ok: NO NT password stored for user %s.\n",
 175                          username));
 176         }
 177
 178         /* Check for cleartext netlogon. Used by Exchange 5.5. */
 179         if (challenge->length == sizeof(zeros) &&
 180             (memcmp(challenge->data, zeros, challenge->length) == 0 )) {
 181
 182                 DEBUG(4,("sam_password_ok: checking plaintext passwords for user %s\n",
 183                          username));
 184                 if (nt_pw && nt_response->length) {
 185                         unsigned char pwhash[16];
 186                         mdfour(pwhash, nt_response->data, nt_response->length);
 187                         if (memcmp(pwhash, nt_pw, sizeof(pwhash)) == 0) {
 188                                 return NT_STATUS_OK;
 189                         } else {
 190                                 DEBUG(3,("sam_password_ok: NT (Unicode) plaintext password check failed for user %s\n",
 191                                          username));
 192                                 return NT_STATUS_WRONG_PASSWORD;
 193                         }
 194
 195                 } else if (!lp_lanman_auth()) {
 196                         DEBUG(3,("sam_password_ok: (plaintext password check) LANMAN passwords NOT PERMITTED for user %s\n",
 197                                  username));
 198
 199                 } else if (lm_pw && lm_response->length) {
 200                         uchar dospwd[14];
 201                         uchar p16[16];
 202                         ZERO_STRUCT(dospwd);
 203
 204                         DEBUG(100, ("DOS password: %s\n"));
 205                         memcpy(dospwd, lm_response->data, MIN(lm_response->length, sizeof(dospwd)));
 206                         /* Only the fisrt 14 chars are considered, password need not be null terminated. */
 207                         E_P16((const unsigned char *)dospwd, p16);
 208
 209                         dump_data_pw("DOS password (first buffer)\n", dospwd, 14);
 210                         dump_data_pw("DOS password (wire DES hash)\n", p16, 16);
 211                         dump_data_pw("DOS password (passdb DES hash)\n", lm_pw, 16);
 212                         if (memcmp(p16, lm_pw, sizeof(p16)) == 0) {
 213                                 return NT_STATUS_OK;
 214                         } else {
 215                                 DEBUG(3,("sam_password_ok: LANMAN (ASCII) plaintext password check failed for user %s\n",
 216                                          username));
 217                                 return NT_STATUS_WRONG_PASSWORD;
 218                         }
 219                 } else {
 220                         DEBUG(3, ("Plaintext authentication for user %s attempted, but neither NT nor LM passwords available\n", username));
 221                         return NT_STATUS_WRONG_PASSWORD;
 222                 }
 223         }
 224
 225         if (nt_response->length != 0 && nt_response->length < 24) {
 226                 DEBUG(2,("sam_password_ok: invalid NT password length (%lu) for user %s\n",
 227                          (unsigned long)nt_response->length, username));
 228         }
 229
 230         if (nt_response->length >= 24 && nt_pw) {
 231                 if (nt_response->length > 24) {
 232                         /* We have the NT MD4 hash challenge available - see if we can
 233                            use it (ie. does it exist in the smbpasswd file).
 234                         */
 235                         DEBUG(4,("sam_password_ok: Checking NTLMv2 password with domain [%s]\n", client_domain));
 236                         if (smb_pwd_check_ntlmv2( nt_response,
 237                                                   nt_pw, challenge,
 238                                           client_username,
 239                                                   client_domain,
 240                                                   user_sess_key)) {
 241                                 return NT_STATUS_OK;
 242                         }
 243
 244                         DEBUG(4,("sam_password_ok: Checking NTLMv2 password without a domain\n"));
 245                         if (smb_pwd_check_ntlmv2( nt_response,
 246                                                   nt_pw, challenge,
 247                                                   client_username,
 248                                                   "",
 249                                                   user_sess_key)) {
 250                                 return NT_STATUS_OK;
 251                         } else {
 252                                 DEBUG(3,("sam_password_ok: NTLMv2 password check failed\n"));
 253                                 return NT_STATUS_WRONG_PASSWORD;
 254                         }
 255                 }
 256
 257                 if (lp_ntlm_auth()) {
 258                         /* We have the NT MD4 hash challenge available - see if we can
 259                            use it (ie. does it exist in the smbpasswd file).
 260                         */
 261                         DEBUG(4,("sam_password_ok: Checking NT MD4 password\n"));
 262                         if (smb_pwd_check_ntlmv1(nt_response,
 263                                                  nt_pw, challenge,
 264                                                  user_sess_key)) {
 265                                 /* The LM session key for this response is not very secure,
 266                                    so use it only if we otherwise allow LM authentication */
 267
 268                                 if (lp_lanman_auth() && lm_pw) {
 269                                         uint8 first_8_lm_hash[16];
 270                                         memcpy(first_8_lm_hash, lm_pw, 8);
 271                                         memset(first_8_lm_hash + 8, '\0', 8);
 272                                         *lm_sess_key = data_blob(first_8_lm_hash, 16);
 273                                 }
 274                                 return NT_STATUS_OK;
 275                         } else {
 276                                 DEBUG(3,("sam_password_ok: NT MD4 password check failed for user %s\n",
 277                                          username));
 278                                 return NT_STATUS_WRONG_PASSWORD;
 279                         }
 280                 } else {
 281                         DEBUG(2,("sam_password_ok: NTLMv1 passwords NOT PERMITTED for user %s\n",
 282                                  username));
 283                         /* no return, becouse we might pick up LMv2 in the LM field */
 284                 }
 285         }
 286
 287         if (lm_response->length == 0) {
 288                 DEBUG(3,("sam_password_ok: NEITHER LanMan nor NT password supplied for user %s\n",
 289                          username));
 290                 return NT_STATUS_WRONG_PASSWORD;
 291         }
 292
 293         if (lm_response->length < 24) {
 294                 DEBUG(2,("sam_password_ok: invalid LanMan password length (%lu) for user %s\n",
 295                          (unsigned long)nt_response->length, username));
 296                 return NT_STATUS_WRONG_PASSWORD;
 297         }
 298
 299         if (!lp_lanman_auth()) {
 300                 DEBUG(3,("sam_password_ok: Lanman passwords NOT PERMITTED for user %s\n",
 301                          username));
 302         } else if (!lm_pw) {
 303                 DEBUG(3,("sam_password_ok: NO LanMan password set for user %s (and no NT password supplied)\n",
 304                          username));
 305         } else {
 306                 DEBUG(4,("sam_password_ok: Checking LM password\n"));
 307                 if (smb_pwd_check_ntlmv1(lm_response,
 308                                          lm_pw, challenge,
 309                                          NULL)) {
 310                         uint8 first_8_lm_hash[16];
 311                         memcpy(first_8_lm_hash, lm_pw, 8);
 312                         memset(first_8_lm_hash + 8, '\0', 8);
 313                         *user_sess_key = data_blob(first_8_lm_hash, 16);
 314                         *lm_sess_key = data_blob(first_8_lm_hash, 16);
 315                         return NT_STATUS_OK;
 316                 }
 317         }
 318
 319         if (!nt_pw) {
 320                 DEBUG(4,("sam_password_ok: LM password check failed for user, no NT password %s\n",username));
 321                 return NT_STATUS_WRONG_PASSWORD;
 322         }
 323
 324         /* This is for 'LMv2' authentication.  almost NTLMv2 but limited to 24 bytes.
 325            - related to Win9X, legacy NAS pass-though authentication
 326         */
 327         DEBUG(4,("sam_password_ok: Checking LMv2 password with domain %s\n", client_domain));
 328         if (smb_pwd_check_ntlmv2( lm_response,
 329                                   nt_pw, challenge,
 330                                   client_username,
 331                                   client_domain,
 332                                   NULL)) {
 333                 return NT_STATUS_OK;
 334         }
 335
 336         DEBUG(4,("sam_password_ok: Checking LMv2 password without a domain\n"));
 337         if (smb_pwd_check_ntlmv2( lm_response,
 338                                   nt_pw, challenge,
 339                                   client_username,
 340                                   "",
 341                                   NULL)) {
 342                 return NT_STATUS_OK;
 343         }
 344
 345         /* Apparently NT accepts NT responses in the LM field
 346            - I think this is related to Win9X pass-though authentication
 347         */
 348         DEBUG(4,("sam_password_ok: Checking NT MD4 password in LM field\n"));
 349         if (lp_ntlm_auth()) {
 350                 if (smb_pwd_check_ntlmv1(lm_response,
 351                                          nt_pw, challenge,
 352                                          NULL)) {
 353                         /* The session key for this response is still very odd.
 354                            It not very secure, so use it only if we otherwise
 355                            allow LM authentication */
 356
 357                         if (lp_lanman_auth() && lm_pw) {
 358                                 uint8 first_8_lm_hash[16];
 359                                 memcpy(first_8_lm_hash, lm_pw, 8);
 360                                 memset(first_8_lm_hash + 8, '\0', 8);
 361                                 *user_sess_key = data_blob(first_8_lm_hash, 16);
 362                                 *lm_sess_key = data_blob(first_8_lm_hash, 16);
 363                         }
 364                         return NT_STATUS_OK;
 365                 }
 366                 DEBUG(3,("sam_password_ok: LM password, NT MD4 password in LM field and LMv2 failed for user %s\n",username));
 367         } else {
 368                 DEBUG(3,("sam_password_ok: LM password and LMv2 failed for user %s, and NT MD4 password in LM field not permitted\n",username));
 369         }
 370         return NT_STATUS_WRONG_PASSWORD;
 371 }
 372
 373 /****************************************************************************
 374  Do a specific test for an smb password being correct, given a smb_password and
 375  the lanman and NT responses.
 376 ****************************************************************************/
 377
 378 static NTSTATUS sam_password_ok(const struct auth_context *auth_context,
 379                                 TALLOC_CTX *mem_ctx,
 380                                 SAM_ACCOUNT *sampass,
 381                                 const auth_usersupplied_info *user_info,
 382                                 DATA_BLOB *user_sess_key,
 383                                 DATA_BLOB *lm_sess_key)
 384 {
 385         uint16 acct_ctrl;
 386         const uint8 *lm_pw, *nt_pw;
 387         const char *username = pdb_get_username(sampass);
 388
 389         acct_ctrl = pdb_get_acct_ctrl(sampass);
 390         if (acct_ctrl & ACB_PWNOTREQ) {
 391                 if (lp_null_passwords()) {
 392                         DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", username));
 393                         return NT_STATUS_OK;
 394                 } else {
 395                         DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", username));
 396                         return NT_STATUS_LOGON_FAILURE;
 397                 }
 398         }
 399
 400         lm_pw = pdb_get_lanman_passwd(sampass);
 401         nt_pw = pdb_get_nt_passwd(sampass);
 402
 403         return ntlm_password_check(mem_ctx, &auth_context->challenge,
 404                                    &user_info->lm_resp, &user_info->nt_resp,
 405                                    username,
 406                                    user_info->smb_name.str,
 407                                    user_info->client_domain.str,
 408                                    lm_pw, nt_pw, user_sess_key, lm_sess_key);
 409 }
 410
 411
 412 /****************************************************************************
 413  Do a specific test for a SAM_ACCOUNT being vaild for this connection
 414  (ie not disabled, expired and the like).
 415 ****************************************************************************/
 416
 417 static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,
 418                                SAM_ACCOUNT *sampass,
 419                                const auth_usersupplied_info *user_info)
 420 {
 421         uint16  acct_ctrl = pdb_get_acct_ctrl(sampass);
 422         char *workstation_list;
 423         time_t kickoff_time;
 424
 425         DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n",pdb_get_username(sampass)));
 426
 427         /* Quit if the account was disabled. */
 428         if (acct_ctrl & ACB_DISABLED) {
 429                 DEBUG(1,("sam_account_ok: Account for user '%s' was disabled.\n", pdb_get_username(sampass)));
 430                 return NT_STATUS_ACCOUNT_DISABLED;
 431         }
 432
 433         /* Quit if the account was locked out. */
 434         if (acct_ctrl & ACB_AUTOLOCK) {
 435                 DEBUG(1,("sam_account_ok: Account for user %s was locked out.\n", pdb_get_username(sampass)));
 436                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
 437         }
 438
 439         /* Test account expire time */
 440
 441         kickoff_time = pdb_get_kickoff_time(sampass);
 442         if (kickoff_time != 0 && time(NULL) > kickoff_time) {
 443                 DEBUG(1,("sam_account_ok: Account for user '%s' has expired.\n", pdb_get_username(sampass)));
 444                 DEBUG(3,("sam_account_ok: Account expired at '%ld' unix time.\n", (long)kickoff_time));
 445                 return NT_STATUS_ACCOUNT_EXPIRED;
 446         }
 447
 448         if (!(pdb_get_acct_ctrl(sampass) & ACB_PWNOEXP)) {
 449                 time_t must_change_time = pdb_get_pass_must_change_time(sampass);
 450                 time_t last_set_time = pdb_get_pass_last_set_time(sampass);
 451
 452                 /* check for immediate expiry "must change at next logon" */
 453                 if (must_change_time == 0 && last_set_time != 0) {
 454                         DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n", pdb_get_username(sampass)));
 455                         return NT_STATUS_PASSWORD_MUST_CHANGE;
 456                 }
 457
 458                 /* check for expired password */
 459                 if (must_change_time < time(NULL) && must_change_time != 0) {
 460                         DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n", pdb_get_username(sampass)));
 461                         DEBUG(1,("sam_account_ok: Password expired at '%s' (%ld) unix time.\n", http_timestring(must_change_time), (long)must_change_time));
 462                         return NT_STATUS_PASSWORD_EXPIRED;
 463                 }
 464         }
 465
 466         /* Test workstation. Workstation list is comma separated. */
 467
 468         workstation_list = talloc_strdup(mem_ctx, pdb_get_workstations(sampass));
 469         if (!workstation_list)
 470                 return NT_STATUS_NO_MEMORY;
 471
 472         if (*workstation_list) {
 473                 BOOL invalid_ws = True;
 474                 const char *s = workstation_list;
 475
 476                 fstring tok;
 477
 478                 while (next_token(&s, tok, ",", sizeof(tok))) {
 479                         DEBUG(10,("sam_account_ok: checking for workstation match %s and %s (len=%d)\n",
 480                                   tok, user_info->wksta_name.str, user_info->wksta_name.len));
 481                         if(strequal(tok, user_info->wksta_name.str)) {
 482                                 invalid_ws = False;
 483                                 break;
 484                         }
 485                 }
 486
 487                 if (invalid_ws)
 488                         return NT_STATUS_INVALID_WORKSTATION;
 489         }
 490
 491         if (acct_ctrl & ACB_DOMTRUST) {
 492                 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", pdb_get_username(sampass)));
 493                 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
 494         }
 495
 496         if (acct_ctrl & ACB_SVRTRUST) {
 497                 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", pdb_get_username(sampass)));
 498                 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
 499         }
 500
 501         if (acct_ctrl & ACB_WSTRUST) {
 502                 DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", pdb_get_username(sampass)));
 503                 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
 504         }
 505
 506         return NT_STATUS_OK;
 507 }
 508
 509 /****************************************************************************
 510 check if a username/password is OK assuming the password is a 24 byte
 511 SMB hash supplied in the user_info structure
 512 return an NT_STATUS constant.
 513 ****************************************************************************/
 514
 515 static NTSTATUS check_sam_security(const struct auth_context *auth_context,
 516                                    void *my_private_data,
 517                                    TALLOC_CTX *mem_ctx,
 518                                    const auth_usersupplied_info *user_info,
 519                                    auth_serversupplied_info **server_info)
 520 {
 521         SAM_ACCOUNT *sampass=NULL;
 522         BOOL ret;
 523         NTSTATUS nt_status;
 524         DATA_BLOB user_sess_key = data_blob(NULL, 0);
 525         DATA_BLOB lm_sess_key = data_blob(NULL, 0);
 526
 527         if (!user_info || !auth_context) {
 528                 return NT_STATUS_UNSUCCESSFUL;
 529         }
 530
 531         /* Can't use the talloc version here, because the returned struct gets
 532            kept on the server_info */
 533         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
 534                 return nt_status;
 535         }
 536
 537         /* get the account information */
 538
 539         become_root();
 540         ret = pdb_getsampwnam(sampass, user_info->internal_username.str);
 541         unbecome_root();
 542
 543         if (ret == False) {
 544                 DEBUG(3,("check_sam_security: Couldn't find user '%s' in passdb file.\n", user_info->internal_username.str));
 545                 pdb_free_sam(&sampass);
 546                 return NT_STATUS_NO_SUCH_USER;
 547         }
 548
 549         nt_status = sam_password_ok(auth_context, mem_ctx, sampass,
 550                                     user_info, &user_sess_key, &lm_sess_key);
 551
 552         if (!NT_STATUS_IS_OK(nt_status)) {
 553                 pdb_free_sam(&sampass);
 554                 return nt_status;
 555         }
 556
 557         nt_status = sam_account_ok(mem_ctx, sampass, user_info);
 558
 559         if (!NT_STATUS_IS_OK(nt_status)) {
 560                 pdb_free_sam(&sampass);
 561                 return nt_status;
 562         }
 563
 564         if (!NT_STATUS_IS_OK(nt_status = make_server_info_sam(server_info, sampass))) {
 565                 DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status)));
 566                 return nt_status;
 567         }
 568
 569         (*server_info)->nt_session_key = user_sess_key;
 570         (*server_info)->lm_session_key = lm_sess_key;
 571
 572         return nt_status;
 573 }
 574
 575 /* module initialisation */
 576 static NTSTATUS auth_init_sam_ignoredomain(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
 577 {
 578         if (!make_auth_methods(auth_context, auth_method)) {
 579                 return NT_STATUS_NO_MEMORY;
 580         }
 581
 582         (*auth_method)->auth = check_sam_security;
 583         (*auth_method)->name = "sam_ignoredomain";
 584         return NT_STATUS_OK;
 585 }
 586
 587
 588 /****************************************************************************
 589 Check SAM security (above) but with a few extra checks.
 590 ****************************************************************************/
 591
 592 static NTSTATUS check_samstrict_security(const struct auth_context *auth_context,
 593                                          void *my_private_data,
 594                                          TALLOC_CTX *mem_ctx,
 595                                          const auth_usersupplied_info *user_info,
 596                                          auth_serversupplied_info **server_info)
 597 {
 598         BOOL is_local_name, is_my_domain;
 599
 600         if (!user_info || !auth_context) {
 601                 return NT_STATUS_LOGON_FAILURE;
 602         }
 603
 604         is_local_name = is_myname(user_info->domain.str);
 605         is_my_domain  = strequal(user_info->domain.str, lp_workgroup());
 606
 607         /* check whether or not we service this domain/workgroup name */
 608
 609         switch ( lp_server_role() ) {
 610                 case ROLE_STANDALONE:
 611                 case ROLE_DOMAIN_MEMBER:
 612                         if ( !is_local_name ) {
 613                                 DEBUG(6,("check_samstrict_security: %s is not one of my local names (%s)\n",
 614                                         user_info->domain.str, (lp_server_role() == ROLE_DOMAIN_MEMBER
 615                                         ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
 616                                 return NT_STATUS_NOT_IMPLEMENTED;
 617                         }
 618                 case ROLE_DOMAIN_PDC:
 619                 case ROLE_DOMAIN_BDC:
 620                         if ( !is_local_name && !is_my_domain ) {
 621                                 DEBUG(6,("check_samstrict_security: %s is not one of my local names or domain name (DC)\n",
 622                                         user_info->domain.str));
 623                                 return NT_STATUS_NOT_IMPLEMENTED;
 624                         }
 625                 default: /* name is ok */
 626                         break;
 627         }
 628
 629         return check_sam_security(auth_context, my_private_data, mem_ctx, user_info, server_info);
 630 }
 631
 632 /* module initialisation */
 633 static NTSTATUS auth_init_sam(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
 634 {
 635         if (!make_auth_methods(auth_context, auth_method)) {
 636                 return NT_STATUS_NO_MEMORY;
 637         }
 638
 639         (*auth_method)->auth = check_samstrict_security;
 640         (*auth_method)->name = "sam";
 641         return NT_STATUS_OK;
 642 }
 643
 644 NTSTATUS auth_sam_init(void)
 645 {
 646         smb_register_auth(AUTH_INTERFACE_VERSION, "sam", auth_init_sam);
 647         smb_register_auth(AUTH_INTERFACE_VERSION, "sam_ignoredomain", auth_init_sam_ignoredomain);
 648         return NT_STATUS_OK;
 649 }