Changeset 745 for trunk/server/source3/auth/auth_sam.c
- Timestamp:
- Nov 27, 2012, 4:43:17 PM (13 years ago)
- Location:
- trunk/server
- Files:
-
- 2 edited
-
. (modified) (1 prop)
-
source3/auth/auth_sam.c (modified) (8 diffs)
Legend:
- Unmodified
- Added
- Removed
-
trunk/server
- Property svn:mergeinfo changed
/vendor/current merged: 581,587,591,594,597,600,615,618,740
- Property svn:mergeinfo changed
-
trunk/server/source3/auth/auth_sam.c
r480 r745 22 22 23 23 #include "includes.h" 24 #include " ../libcli/auth/libcli_auth.h"24 #include "auth.h" 25 25 26 26 #undef DBGC_CLASS 27 27 #define DBGC_CLASS DBGC_AUTH 28 28 29 /**************************************************************************** 30 Do a specific test for an smb password being correct, given a smb_password and 31 the lanman and NT responses. 32 ****************************************************************************/ 33 34 static NTSTATUS sam_password_ok(const struct auth_context *auth_context, 35 TALLOC_CTX *mem_ctx, 36 const char *username, 37 uint32_t acct_ctrl, 38 const uint8_t *lm_pw, 39 const uint8_t *nt_pw, 40 const auth_usersupplied_info *user_info, 41 DATA_BLOB *user_sess_key, 42 DATA_BLOB *lm_sess_key) 29 static NTSTATUS auth_sam_ignoredomain_auth(const struct auth_context *auth_context, 30 void *my_private_data, 31 TALLOC_CTX *mem_ctx, 32 const struct auth_usersupplied_info *user_info, 33 struct auth_serversupplied_info **server_info) 43 34 { 44 struct samr_Password _lm_hash, _nt_hash, _client_lm_hash, _client_nt_hash;45 struct samr_Password *lm_hash = NULL;46 struct samr_Password *nt_hash = NULL;47 struct samr_Password *client_lm_hash = NULL;48 struct samr_Password *client_nt_hash = NULL;49 50 *user_sess_key = data_blob_null;51 *lm_sess_key = data_blob_null;52 53 if (acct_ctrl & ACB_PWNOTREQ) {54 if (lp_null_passwords()) {55 DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", username));56 return NT_STATUS_OK;57 } else {58 DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", username));59 return NT_STATUS_LOGON_FAILURE;60 }61 }62 63 if (lm_pw) {64 memcpy(_lm_hash.hash, lm_pw, sizeof(_lm_hash.hash));65 lm_hash = &_lm_hash;66 }67 if (nt_pw) {68 memcpy(_nt_hash.hash, nt_pw, sizeof(_nt_hash.hash));69 nt_hash = &_nt_hash;70 }71 if (user_info->lm_interactive_pwd.data && sizeof(_client_lm_hash.hash) == user_info->lm_interactive_pwd.length) {72 memcpy(_client_lm_hash.hash, user_info->lm_interactive_pwd.data, sizeof(_lm_hash.hash));73 client_lm_hash = &_client_lm_hash;74 }75 if (user_info->nt_interactive_pwd.data && sizeof(_client_nt_hash.hash) == user_info->nt_interactive_pwd.length) {76 memcpy(_client_nt_hash.hash, user_info->nt_interactive_pwd.data, sizeof(_nt_hash.hash));77 client_nt_hash = &_client_nt_hash;78 }79 80 if (client_lm_hash || client_nt_hash) {81 if (!nt_pw) {82 return NT_STATUS_WRONG_PASSWORD;83 }84 *user_sess_key = data_blob_talloc(mem_ctx, NULL, 16);85 if (!user_sess_key->data) {86 return NT_STATUS_NO_MEMORY;87 }88 SMBsesskeygen_ntv1(nt_pw, user_sess_key->data);89 return hash_password_check(mem_ctx, lp_lanman_auth(),90 client_lm_hash,91 client_nt_hash,92 username,93 lm_hash,94 nt_hash);95 } else {96 return ntlm_password_check(mem_ctx, lp_lanman_auth(),97 lp_ntlm_auth(),98 user_info->logon_parameters,99 &auth_context->challenge,100 &user_info->lm_resp, &user_info->nt_resp,101 username,102 user_info->smb_name,103 user_info->client_domain,104 lm_hash,105 nt_hash,106 user_sess_key, lm_sess_key);107 }108 }109 110 /****************************************************************************111 Check if a user is allowed to logon at this time. Note this is the112 servers local time, as logon hours are just specified as a weekly113 bitmask.114 ****************************************************************************/115 116 static bool logon_hours_ok(struct samu *sampass)117 {118 /* In logon hours first bit is Sunday from 12AM to 1AM */119 const uint8 *hours;120 struct tm *utctime;121 time_t lasttime;122 const char *asct;123 uint8 bitmask, bitpos;124 125 hours = pdb_get_hours(sampass);126 if (!hours) {127 DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n",pdb_get_username(sampass)));128 return True;129 }130 131 lasttime = time(NULL);132 utctime = gmtime(&lasttime);133 if (!utctime) {134 DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",135 pdb_get_username(sampass) ));136 return False;137 }138 139 /* find the corresponding byte and bit */140 bitpos = (utctime->tm_wday * 24 + utctime->tm_hour) % 168;141 bitmask = 1 << (bitpos % 8);142 143 if (! (hours[bitpos/8] & bitmask)) {144 struct tm *t = localtime(&lasttime);145 if (!t) {146 asct = "INVALID TIME";147 } else {148 asct = asctime(t);149 if (!asct) {150 asct = "INVALID TIME";151 }152 }153 154 DEBUG(1, ("logon_hours_ok: Account for user %s not allowed to "155 "logon at this time (%s).\n",156 pdb_get_username(sampass), asct ));157 return False;158 }159 160 asct = asctime(utctime);161 DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",162 pdb_get_username(sampass), asct ? asct : "UNKNOWN TIME" ));163 164 return True;165 }166 167 /****************************************************************************168 Do a specific test for a struct samu being valid for this connection169 (ie not disabled, expired and the like).170 ****************************************************************************/171 172 static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,173 struct samu *sampass,174 const auth_usersupplied_info *user_info)175 {176 uint32 acct_ctrl = pdb_get_acct_ctrl(sampass);177 char *workstation_list;178 time_t kickoff_time;179 180 DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n",pdb_get_username(sampass)));181 182 /* Quit if the account was disabled. */183 if (acct_ctrl & ACB_DISABLED) {184 DEBUG(1,("sam_account_ok: Account for user '%s' was disabled.\n", pdb_get_username(sampass)));185 return NT_STATUS_ACCOUNT_DISABLED;186 }187 188 /* Quit if the account was locked out. */189 if (acct_ctrl & ACB_AUTOLOCK) {190 DEBUG(1,("sam_account_ok: Account for user %s was locked out.\n", pdb_get_username(sampass)));191 return NT_STATUS_ACCOUNT_LOCKED_OUT;192 }193 194 /* Quit if the account is not allowed to logon at this time. */195 if (! logon_hours_ok(sampass)) {196 return NT_STATUS_INVALID_LOGON_HOURS;197 }198 199 /* Test account expire time */200 201 kickoff_time = pdb_get_kickoff_time(sampass);202 if (kickoff_time != 0 && time(NULL) > kickoff_time) {203 DEBUG(1,("sam_account_ok: Account for user '%s' has expired.\n", pdb_get_username(sampass)));204 DEBUG(3,("sam_account_ok: Account expired at '%ld' unix time.\n", (long)kickoff_time));205 return NT_STATUS_ACCOUNT_EXPIRED;206 }207 208 if (!(pdb_get_acct_ctrl(sampass) & ACB_PWNOEXP) && !(pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ)) {209 time_t must_change_time = pdb_get_pass_must_change_time(sampass);210 time_t last_set_time = pdb_get_pass_last_set_time(sampass);211 212 /* check for immediate expiry "must change at next logon"213 * for a user account. */214 if (((acct_ctrl & (ACB_WSTRUST|ACB_SVRTRUST)) == 0) && (last_set_time == 0)) {215 DEBUG(1,("sam_account_ok: Account for user '%s' password must change!\n", pdb_get_username(sampass)));216 return NT_STATUS_PASSWORD_MUST_CHANGE;217 }218 219 /* check for expired password */220 if (must_change_time < time(NULL) && must_change_time != 0) {221 DEBUG(1,("sam_account_ok: Account for user '%s' password expired!\n", pdb_get_username(sampass)));222 DEBUG(1,("sam_account_ok: Password expired at '%s' (%ld) unix time.\n", http_timestring(talloc_tos(), must_change_time), (long)must_change_time));223 return NT_STATUS_PASSWORD_EXPIRED;224 }225 }226 227 /* Test workstation. Workstation list is comma separated. */228 229 workstation_list = talloc_strdup(mem_ctx, pdb_get_workstations(sampass));230 if (!workstation_list)231 return NT_STATUS_NO_MEMORY;232 233 if (*workstation_list) {234 bool invalid_ws = True;235 char *tok = NULL;236 const char *s = workstation_list;237 char *machine_name = talloc_asprintf(mem_ctx, "%s$", user_info->wksta_name);238 239 if (machine_name == NULL)240 return NT_STATUS_NO_MEMORY;241 242 while (next_token_talloc(mem_ctx, &s, &tok, ",")) {243 DEBUG(10,("sam_account_ok: checking for workstation match %s and %s\n",244 tok, user_info->wksta_name));245 if(strequal(tok, user_info->wksta_name)) {246 invalid_ws = False;247 break;248 }249 if (tok[0] == '+') {250 DEBUG(10,("sam_account_ok: checking for workstation %s in group: %s\n",251 machine_name, tok + 1));252 if (user_in_group(machine_name, tok + 1)) {253 invalid_ws = False;254 break;255 }256 }257 TALLOC_FREE(tok);258 }259 TALLOC_FREE(tok);260 TALLOC_FREE(machine_name);261 262 if (invalid_ws)263 return NT_STATUS_INVALID_WORKSTATION;264 }265 266 if (acct_ctrl & ACB_DOMTRUST) {267 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", pdb_get_username(sampass)));268 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;269 }270 271 if (acct_ctrl & ACB_SVRTRUST) {272 if (!(user_info->logon_parameters & MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT)) {273 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", pdb_get_username(sampass)));274 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;275 }276 }277 278 if (acct_ctrl & ACB_WSTRUST) {279 if (!(user_info->logon_parameters & MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT)) {280 DEBUG(2,("sam_account_ok: Wksta trust account %s denied by server\n", pdb_get_username(sampass)));281 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;282 }283 }284 return NT_STATUS_OK;285 }286 287 /**288 * Check whether the given password is one of the last two289 * password history entries. If so, the bad pwcount should290 * not be incremented even thought the actual password check291 * failed.292 */293 static bool need_to_increment_bad_pw_count(294 const struct auth_context *auth_context,295 struct samu* sampass,296 const auth_usersupplied_info *user_info)297 {298 uint8_t i;299 const uint8_t *pwhistory;300 uint32_t pwhistory_len;301 uint32_t policy_pwhistory_len;302 uint32_t acct_ctrl;303 const char *username;304 TALLOC_CTX *mem_ctx = talloc_stackframe();305 bool result = true;306 307 pdb_get_account_policy(PDB_POLICY_PASSWORD_HISTORY,308 &policy_pwhistory_len);309 if (policy_pwhistory_len == 0) {310 goto done;311 }312 313 pwhistory = pdb_get_pw_history(sampass, &pwhistory_len);314 if (!pwhistory || pwhistory_len == 0) {315 goto done;316 }317 318 acct_ctrl = pdb_get_acct_ctrl(sampass);319 username = pdb_get_username(sampass);320 321 for (i=1; i < MIN(MIN(3, policy_pwhistory_len), pwhistory_len); i++) {322 static const uint8_t zero16[SALTED_MD5_HASH_LEN];323 const uint8_t *salt;324 const uint8_t *nt_pw;325 NTSTATUS status;326 DATA_BLOB user_sess_key = data_blob_null;327 DATA_BLOB lm_sess_key = data_blob_null;328 329 salt = &pwhistory[i*PW_HISTORY_ENTRY_LEN];330 nt_pw = salt + PW_HISTORY_SALT_LEN;331 332 if (memcmp(zero16, nt_pw, NT_HASH_LEN) == 0) {333 /* skip zero password hash */334 continue;335 }336 337 if (memcmp(zero16, salt, PW_HISTORY_SALT_LEN) != 0) {338 /* skip nonzero salt (old format entry) */339 continue;340 }341 342 status = sam_password_ok(auth_context, mem_ctx,343 username, acct_ctrl, NULL, nt_pw,344 user_info, &user_sess_key, &lm_sess_key);345 if (NT_STATUS_IS_OK(status)) {346 result = false;347 break;348 }349 }350 351 done:352 TALLOC_FREE(mem_ctx);353 return result;354 }355 356 /****************************************************************************357 check if a username/password is OK assuming the password is a 24 byte358 SMB hash supplied in the user_info structure359 return an NT_STATUS constant.360 ****************************************************************************/361 362 static NTSTATUS check_sam_security(const struct auth_context *auth_context,363 void *my_private_data,364 TALLOC_CTX *mem_ctx,365 const auth_usersupplied_info *user_info,366 auth_serversupplied_info **server_info)367 {368 struct samu *sampass=NULL;369 bool ret;370 NTSTATUS nt_status;371 NTSTATUS update_login_attempts_status;372 DATA_BLOB user_sess_key = data_blob_null;373 DATA_BLOB lm_sess_key = data_blob_null;374 bool updated_autolock = False, updated_badpw = False;375 const char *username;376 const uint8_t *nt_pw;377 const uint8_t *lm_pw;378 379 35 if (!user_info || !auth_context) { 380 36 return NT_STATUS_UNSUCCESSFUL; 381 37 } 382 383 /* the returned struct gets kept on the server_info, by means 384 of a steal further down */ 385 386 sampass = samu_new(mem_ctx); 387 if (sampass == NULL) { 388 return NT_STATUS_NO_MEMORY; 389 } 390 391 /* get the account information */ 392 393 become_root(); 394 ret = pdb_getsampwnam(sampass, user_info->internal_username); 395 unbecome_root(); 396 397 if (ret == False) { 398 DEBUG(3,("check_sam_security: Couldn't find user '%s' in " 399 "passdb.\n", user_info->internal_username)); 400 TALLOC_FREE(sampass); 401 return NT_STATUS_NO_SUCH_USER; 402 } 403 404 username = pdb_get_username(sampass); 405 nt_pw = pdb_get_nt_passwd(sampass); 406 lm_pw = pdb_get_lanman_passwd(sampass); 407 408 /* see if autolock flag needs to be updated */ 409 if (pdb_get_acct_ctrl(sampass) & ACB_NORMAL) 410 pdb_update_autolock_flag(sampass, &updated_autolock); 411 /* Quit if the account was locked out. */ 412 if (pdb_get_acct_ctrl(sampass) & ACB_AUTOLOCK) { 413 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n", username)); 414 return NT_STATUS_ACCOUNT_LOCKED_OUT; 415 } 416 417 nt_status = sam_password_ok(auth_context, mem_ctx, 418 username, pdb_get_acct_ctrl(sampass), lm_pw, nt_pw, 419 user_info, &user_sess_key, &lm_sess_key); 420 421 /* Notify passdb backend of login success/failure. If not 422 NT_STATUS_OK the backend doesn't like the login */ 423 424 update_login_attempts_status = pdb_update_login_attempts(sampass, NT_STATUS_IS_OK(nt_status)); 425 426 if (!NT_STATUS_IS_OK(nt_status)) { 427 bool increment_bad_pw_count = false; 428 429 if (NT_STATUS_EQUAL(nt_status,NT_STATUS_WRONG_PASSWORD) && 430 pdb_get_acct_ctrl(sampass) & ACB_NORMAL && 431 NT_STATUS_IS_OK(update_login_attempts_status)) 432 { 433 increment_bad_pw_count = 434 need_to_increment_bad_pw_count(auth_context, 435 sampass, 436 user_info); 437 } 438 439 if (increment_bad_pw_count) { 440 pdb_increment_bad_password_count(sampass); 441 updated_badpw = True; 442 } else { 443 pdb_update_bad_password_count(sampass, 444 &updated_badpw); 445 } 446 if (updated_autolock || updated_badpw){ 447 NTSTATUS status; 448 449 become_root(); 450 status = pdb_update_sam_account(sampass); 451 unbecome_root(); 452 453 if (!NT_STATUS_IS_OK(status)) { 454 DEBUG(1, ("Failed to modify entry: %s\n", 455 nt_errstr(status))); 456 } 457 } 458 goto done; 459 } 460 461 if ((pdb_get_acct_ctrl(sampass) & ACB_NORMAL) && 462 (pdb_get_bad_password_count(sampass) > 0)){ 463 pdb_set_bad_password_count(sampass, 0, PDB_CHANGED); 464 pdb_set_bad_password_time(sampass, 0, PDB_CHANGED); 465 updated_badpw = True; 466 } 467 468 if (updated_autolock || updated_badpw){ 469 NTSTATUS status; 470 471 become_root(); 472 status = pdb_update_sam_account(sampass); 473 unbecome_root(); 474 475 if (!NT_STATUS_IS_OK(status)) { 476 DEBUG(1, ("Failed to modify entry: %s\n", 477 nt_errstr(status))); 478 } 479 } 480 481 nt_status = sam_account_ok(mem_ctx, sampass, user_info); 482 483 if (!NT_STATUS_IS_OK(nt_status)) { 484 goto done; 485 } 486 487 become_root(); 488 nt_status = make_server_info_sam(server_info, sampass); 489 unbecome_root(); 490 sampass = NULL; 491 492 if (!NT_STATUS_IS_OK(nt_status)) { 493 DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status))); 494 goto done; 495 } 496 497 (*server_info)->user_session_key = 498 data_blob_talloc(*server_info, user_sess_key.data, 499 user_sess_key.length); 500 data_blob_free(&user_sess_key); 501 502 (*server_info)->lm_session_key = 503 data_blob_talloc(*server_info, lm_sess_key.data, 504 lm_sess_key.length); 505 data_blob_free(&lm_sess_key); 506 507 (*server_info)->nss_token |= user_info->was_mapped; 508 509 done: 510 TALLOC_FREE(sampass); 511 data_blob_free(&user_sess_key); 512 data_blob_free(&lm_sess_key); 513 return nt_status; 38 return check_sam_security(&auth_context->challenge, mem_ctx, 39 user_info, server_info); 514 40 } 515 41 … … 517 43 static NTSTATUS auth_init_sam_ignoredomain(struct auth_context *auth_context, const char *param, auth_methods **auth_method) 518 44 { 519 if (!make_auth_methods(auth_context, auth_method)) { 45 struct auth_methods *result; 46 47 result = TALLOC_ZERO_P(auth_context, struct auth_methods); 48 if (result == NULL) { 520 49 return NT_STATUS_NO_MEMORY; 521 50 } 51 result->auth = auth_sam_ignoredomain_auth; 52 result->name = "sam_ignoredomain"; 522 53 523 (*auth_method)->auth = check_sam_security; 524 (*auth_method)->name = "sam_ignoredomain"; 54 *auth_method = result; 525 55 return NT_STATUS_OK; 526 56 } … … 531 61 ****************************************************************************/ 532 62 533 static NTSTATUS check_samstrict_security(const struct auth_context *auth_context,534 void *my_private_data,535 536 const auth_usersupplied_info *user_info,537 63 static NTSTATUS auth_samstrict_auth(const struct auth_context *auth_context, 64 void *my_private_data, 65 TALLOC_CTX *mem_ctx, 66 const struct auth_usersupplied_info *user_info, 67 struct auth_serversupplied_info **server_info) 538 68 { 539 69 bool is_local_name, is_my_domain; … … 543 73 } 544 74 545 is_local_name = is_myname(user_info->domain); 546 is_my_domain = strequal(user_info->domain, lp_workgroup()); 75 DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name)); 76 77 is_local_name = is_myname(user_info->mapped.domain_name); 78 is_my_domain = strequal(user_info->mapped.domain_name, lp_workgroup()); 547 79 548 80 /* check whether or not we service this domain/workgroup name */ … … 553 85 if ( !is_local_name ) { 554 86 DEBUG(6,("check_samstrict_security: %s is not one of my local names (%s)\n", 555 user_info-> domain, (lp_server_role() == ROLE_DOMAIN_MEMBER87 user_info->mapped.domain_name, (lp_server_role() == ROLE_DOMAIN_MEMBER 556 88 ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") )); 557 89 return NT_STATUS_NOT_IMPLEMENTED; … … 561 93 if ( !is_local_name && !is_my_domain ) { 562 94 DEBUG(6,("check_samstrict_security: %s is not one of my local names or domain name (DC)\n", 563 user_info-> domain));95 user_info->mapped.domain_name)); 564 96 return NT_STATUS_NOT_IMPLEMENTED; 565 97 } … … 568 100 } 569 101 570 return check_sam_security(auth_context, my_private_data, mem_ctx, user_info, server_info); 102 return check_sam_security(&auth_context->challenge, mem_ctx, 103 user_info, server_info); 571 104 } 572 105 … … 574 107 static NTSTATUS auth_init_sam(struct auth_context *auth_context, const char *param, auth_methods **auth_method) 575 108 { 576 if (!make_auth_methods(auth_context, auth_method)) { 109 struct auth_methods *result; 110 111 result = TALLOC_ZERO_P(auth_context, struct auth_methods); 112 if (result == NULL) { 577 113 return NT_STATUS_NO_MEMORY; 578 114 } 115 result->auth = auth_samstrict_auth; 116 result->name = "sam"; 579 117 580 (*auth_method)->auth = check_samstrict_security; 581 (*auth_method)->name = "sam"; 118 *auth_method = result; 582 119 return NT_STATUS_OK; 583 120 }
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