source4/auth/credentials/credentials.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    User credentials handling
   5
   6    Copyright (C) Jelmer Vernooij 2005
   7    Copyright (C) Tim Potter 2001
   8    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "librpc/gen_ndr/samr.h" /* for struct samrPassword */
  26 #include "auth/credentials/credentials.h"
  27 #include "auth/credentials/credentials_krb5.h"
  28 #include "auth/credentials/credentials_proto.h"
  29 #include "libcli/auth/libcli_auth.h"
  30 #include "lib/events/events.h"
  31 #include "param/param.h"
  32
  33 /**
  34  * Create a new credentials structure
  35  * @param mem_ctx TALLOC_CTX parent for credentials structure
  36  */
  37 _PUBLIC_ struct cli_credentials *cli_credentials_init(TALLOC_CTX *mem_ctx)
  38 {
  39         struct cli_credentials *cred = talloc(mem_ctx, struct cli_credentials);
  40         if (cred == NULL) {
  41                 return cred;
  42         }
  43
  44         cred->workstation_obtained = CRED_UNINITIALISED;
  45         cred->username_obtained = CRED_UNINITIALISED;
  46         cred->password_obtained = CRED_UNINITIALISED;
  47         cred->domain_obtained = CRED_UNINITIALISED;
  48         cred->realm_obtained = CRED_UNINITIALISED;
  49         cred->ccache_obtained = CRED_UNINITIALISED;
  50         cred->client_gss_creds_obtained = CRED_UNINITIALISED;
  51         cred->principal_obtained = CRED_UNINITIALISED;
  52         cred->keytab_obtained = CRED_UNINITIALISED;
  53         cred->server_gss_creds_obtained = CRED_UNINITIALISED;
  54
  55         cred->ccache_threshold = CRED_UNINITIALISED;
  56         cred->client_gss_creds_threshold = CRED_UNINITIALISED;
  57
  58         cred->workstation = NULL;
  59         cred->username = NULL;
  60         cred->password = NULL;
  61         cred->old_password = NULL;
  62         cred->domain = NULL;
  63         cred->realm = NULL;
  64         cred->principal = NULL;
  65         cred->salt_principal = NULL;
  66         cred->impersonate_principal = NULL;
  67         cred->target_service = NULL;
  68
  69         cred->bind_dn = NULL;
  70
  71         cred->nt_hash = NULL;
  72
  73         cred->lm_response.data = NULL;
  74         cred->lm_response.length = 0;
  75         cred->nt_response.data = NULL;
  76         cred->nt_response.length = 0;
  77
  78         cred->ccache = NULL;
  79         cred->client_gss_creds = NULL;
  80         cred->keytab = NULL;
  81         cred->server_gss_creds = NULL;
  82
  83         cred->workstation_cb = NULL;
  84         cred->password_cb = NULL;
  85         cred->username_cb = NULL;
  86         cred->domain_cb = NULL;
  87         cred->realm_cb = NULL;
  88         cred->principal_cb = NULL;
  89
  90         cred->priv_data = NULL;
  91
  92         cred->netlogon_creds = NULL;
  93         cred->secure_channel_type = SEC_CHAN_NULL;
  94
  95         cred->kvno = 0;
  96
  97         cred->password_last_changed_time = 0;
  98
  99         cred->smb_krb5_context = NULL;
 100
 101         cred->machine_account_pending = false;
 102         cred->machine_account_pending_lp_ctx = NULL;
 103
 104         cred->machine_account = false;
 105
 106         cred->tries = 3;
 107
 108         cred->callback_running = false;
 109
 110         cli_credentials_set_kerberos_state(cred, CRED_AUTO_USE_KERBEROS);
 111         cli_credentials_set_gensec_features(cred, 0);
 112
 113         return cred;
 114 }
 115
 116 /**
 117  * Create a new anonymous credential
 118  * @param mem_ctx TALLOC_CTX parent for credentials structure
 119  */
 120 _PUBLIC_ struct cli_credentials *cli_credentials_init_anon(TALLOC_CTX *mem_ctx)
 121 {
 122         struct cli_credentials *anon_credentials;
 123
 124         anon_credentials = cli_credentials_init(mem_ctx);
 125         cli_credentials_set_anonymous(anon_credentials);
 126
 127         return anon_credentials;
 128 }
 129
 130 _PUBLIC_ void cli_credentials_set_kerberos_state(struct cli_credentials *creds,
 131                                         enum credentials_use_kerberos use_kerberos)
 132 {
 133         creds->use_kerberos = use_kerberos;
 134 }
 135
 136 _PUBLIC_ enum credentials_use_kerberos cli_credentials_get_kerberos_state(struct cli_credentials *creds)
 137 {
 138         return creds->use_kerberos;
 139 }
 140
 141 _PUBLIC_ void cli_credentials_set_gensec_features(struct cli_credentials *creds, uint32_t gensec_features)
 142 {
 143         creds->gensec_features = gensec_features;
 144 }
 145
 146 _PUBLIC_ uint32_t cli_credentials_get_gensec_features(struct cli_credentials *creds)
 147 {
 148         return creds->gensec_features;
 149 }
 150
 151
 152 /**
 153  * Obtain the username for this credentials context.
 154  * @param cred credentials context
 155  * @retval The username set on this context.
 156  * @note Return value will never be NULL except by programmer error.
 157  */
 158 _PUBLIC_ const char *cli_credentials_get_username(struct cli_credentials *cred)
 159 {
 160         if (cred->machine_account_pending) {
 161                 cli_credentials_set_machine_account(cred,
 162                                         cred->machine_account_pending_lp_ctx);
 163         }
 164
 165         if (cred->username_obtained == CRED_CALLBACK &&
 166             !cred->callback_running) {
 167                 cred->callback_running = true;
 168                 cred->username = cred->username_cb(cred);
 169                 cred->callback_running = false;
 170                 cred->username_obtained = CRED_SPECIFIED;
 171                 cli_credentials_invalidate_ccache(cred, cred->username_obtained);
 172         }
 173
 174         return cred->username;
 175 }
 176
 177 _PUBLIC_ bool cli_credentials_set_username(struct cli_credentials *cred,
 178                                   const char *val, enum credentials_obtained obtained)
 179 {
 180         if (obtained >= cred->username_obtained) {
 181                 cred->username = talloc_strdup(cred, val);
 182                 cred->username_obtained = obtained;
 183                 cli_credentials_invalidate_ccache(cred, cred->username_obtained);
 184                 return true;
 185         }
 186
 187         return false;
 188 }
 189
 190 bool cli_credentials_set_username_callback(struct cli_credentials *cred,
 191                                   const char *(*username_cb) (struct cli_credentials *))
 192 {
 193         if (cred->username_obtained < CRED_CALLBACK) {
 194                 cred->username_cb = username_cb;
 195                 cred->username_obtained = CRED_CALLBACK;
 196                 return true;
 197         }
 198
 199         return false;
 200 }
 201
 202 _PUBLIC_ bool cli_credentials_set_bind_dn(struct cli_credentials *cred,
 203                                  const char *bind_dn)
 204 {
 205         cred->bind_dn = talloc_strdup(cred, bind_dn);
 206         return true;
 207 }
 208
 209 /**
 210  * Obtain the BIND DN for this credentials context.
 211  * @param cred credentials context
 212  * @retval The username set on this context.
 213  * @note Return value will be NULL if not specified explictly
 214  */
 215 _PUBLIC_ const char *cli_credentials_get_bind_dn(struct cli_credentials *cred)
 216 {
 217         return cred->bind_dn;
 218 }
 219
 220
 221 /**
 222  * Obtain the client principal for this credentials context.
 223  * @param cred credentials context
 224  * @retval The username set on this context.
 225  * @note Return value will never be NULL except by programmer error.
 226  */
 227 const char *cli_credentials_get_principal_and_obtained(struct cli_credentials *cred, TALLOC_CTX *mem_ctx, enum credentials_obtained *obtained)
 228 {
 229         if (cred->machine_account_pending) {
 230                 cli_credentials_set_machine_account(cred,
 231                                         cred->machine_account_pending_lp_ctx);
 232         }
 233
 234         if (cred->principal_obtained == CRED_CALLBACK &&
 235             !cred->callback_running) {
 236                 cred->callback_running = true;
 237                 cred->principal = cred->principal_cb(cred);
 238                 cred->callback_running = false;
 239                 cred->principal_obtained = CRED_SPECIFIED;
 240                 cli_credentials_invalidate_ccache(cred, cred->principal_obtained);
 241         }
 242
 243         if (cred->principal_obtained < cred->username_obtained
 244             || cred->principal_obtained < MAX(cred->domain_obtained, cred->realm_obtained)) {
 245                 if (cred->domain_obtained > cred->realm_obtained) {
 246                         *obtained = MIN(cred->domain_obtained, cred->username_obtained);
 247                         return talloc_asprintf(mem_ctx, "%s@%s",
 248                                                cli_credentials_get_username(cred),
 249                                                cli_credentials_get_domain(cred));
 250                 } else {
 251                         *obtained = MIN(cred->domain_obtained, cred->username_obtained);
 252                         return talloc_asprintf(mem_ctx, "%s@%s",
 253                                                cli_credentials_get_username(cred),
 254                                                cli_credentials_get_realm(cred));
 255                 }
 256         }
 257         *obtained = cred->principal_obtained;
 258         return talloc_reference(mem_ctx, cred->principal);
 259 }
 260
 261 /**
 262  * Obtain the client principal for this credentials context.
 263  * @param cred credentials context
 264  * @retval The username set on this context.
 265  * @note Return value will never be NULL except by programmer error.
 266  */
 267 _PUBLIC_ const char *cli_credentials_get_principal(struct cli_credentials *cred, TALLOC_CTX *mem_ctx)
 268 {
 269         enum credentials_obtained obtained;
 270         return cli_credentials_get_principal_and_obtained(cred, mem_ctx, &obtained);
 271 }
 272
 273 bool cli_credentials_set_principal(struct cli_credentials *cred,
 274                                    const char *val,
 275                                    enum credentials_obtained obtained)
 276 {
 277         if (obtained >= cred->principal_obtained) {
 278                 cred->principal = talloc_strdup(cred, val);
 279                 cred->principal_obtained = obtained;
 280                 cli_credentials_invalidate_ccache(cred, cred->principal_obtained);
 281                 return true;
 282         }
 283
 284         return false;
 285 }
 286
 287 /* Set a callback to get the principal.  This could be a popup dialog,
 288  * a terminal prompt or similar.  */
 289 bool cli_credentials_set_principal_callback(struct cli_credentials *cred,
 290                                   const char *(*principal_cb) (struct cli_credentials *))
 291 {
 292         if (cred->principal_obtained < CRED_CALLBACK) {
 293                 cred->principal_cb = principal_cb;
 294                 cred->principal_obtained = CRED_CALLBACK;
 295                 return true;
 296         }
 297
 298         return false;
 299 }
 300
 301 /* Some of our tools are 'anonymous by default'.  This is a single
 302  * function to determine if authentication has been explicitly
 303  * requested */
 304
 305 _PUBLIC_ bool cli_credentials_authentication_requested(struct cli_credentials *cred)
 306 {
 307         if (cred->bind_dn) {
 308                 return true;
 309         }
 310
 311         if (cli_credentials_is_anonymous(cred)){
 312                 return false;
 313         }
 314
 315         if (cred->principal_obtained >= CRED_SPECIFIED) {
 316                 return true;
 317         }
 318         if (cred->username_obtained >= CRED_SPECIFIED) {
 319                 return true;
 320         }
 321
 322         if (cli_credentials_get_kerberos_state(cred) == CRED_MUST_USE_KERBEROS) {
 323                 return true;
 324         }
 325
 326         return false;
 327 }
 328
 329 /**
 330  * Obtain the password for this credentials context.
 331  * @param cred credentials context
 332  * @retval If set, the cleartext password, otherwise NULL
 333  */
 334 _PUBLIC_ const char *cli_credentials_get_password(struct cli_credentials *cred)
 335 {
 336         if (cred->machine_account_pending) {
 337                 cli_credentials_set_machine_account(cred,
 338                                                     cred->machine_account_pending_lp_ctx);
 339         }
 340
 341         if (cred->password_obtained == CRED_CALLBACK &&
 342             !cred->callback_running) {
 343                 cred->callback_running = true;
 344                 cred->password = cred->password_cb(cred);
 345                 cred->callback_running = false;
 346                 cred->password_obtained = CRED_CALLBACK_RESULT;
 347                 cli_credentials_invalidate_ccache(cred, cred->password_obtained);
 348         }
 349
 350         return cred->password;
 351 }
 352
 353 /* Set a password on the credentials context, including an indication
 354  * of 'how' the password was obtained */
 355
 356 _PUBLIC_ bool cli_credentials_set_password(struct cli_credentials *cred,
 357                                   const char *val,
 358                                   enum credentials_obtained obtained)
 359 {
 360         if (obtained >= cred->password_obtained) {
 361                 cred->password = talloc_strdup(cred, val);
 362                 cred->password_obtained = obtained;
 363                 cli_credentials_invalidate_ccache(cred, cred->password_obtained);
 364
 365                 cred->nt_hash = NULL;
 366                 cred->lm_response = data_blob(NULL, 0);
 367                 cred->nt_response = data_blob(NULL, 0);
 368                 return true;
 369         }
 370
 371         return false;
 372 }
 373
 374 _PUBLIC_ bool cli_credentials_set_password_callback(struct cli_credentials *cred,
 375                                            const char *(*password_cb) (struct cli_credentials *))
 376 {
 377         if (cred->password_obtained < CRED_CALLBACK) {
 378                 cred->password_cb = password_cb;
 379                 cred->password_obtained = CRED_CALLBACK;
 380                 cli_credentials_invalidate_ccache(cred, cred->password_obtained);
 381                 return true;
 382         }
 383
 384         return false;
 385 }
 386
 387 /**
 388  * Obtain the 'old' password for this credentials context (used for join accounts).
 389  * @param cred credentials context
 390  * @retval If set, the cleartext password, otherwise NULL
 391  */
 392 const char *cli_credentials_get_old_password(struct cli_credentials *cred)
 393 {
 394         if (cred->machine_account_pending) {
 395                 cli_credentials_set_machine_account(cred,
 396                                                     cred->machine_account_pending_lp_ctx);
 397         }
 398
 399         return cred->old_password;
 400 }
 401
 402 bool cli_credentials_set_old_password(struct cli_credentials *cred,
 403                                       const char *val,
 404                                       enum credentials_obtained obtained)
 405 {
 406         cred->old_password = talloc_strdup(cred, val);
 407         return true;
 408 }
 409
 410 /**
 411  * Obtain the password, in the form MD4(unicode(password)) for this credentials context.
 412  *
 413  * Sometimes we only have this much of the password, while the rest of
 414  * the time this call avoids calling E_md4hash themselves.
 415  *
 416  * @param cred credentials context
 417  * @retval If set, the cleartext password, otherwise NULL
 418  */
 419 _PUBLIC_ const struct samr_Password *cli_credentials_get_nt_hash(struct cli_credentials *cred,
 420                                                         TALLOC_CTX *mem_ctx)
 421 {
 422         const char *password = cli_credentials_get_password(cred);
 423
 424         if (password) {
 425                 struct samr_Password *nt_hash = talloc(mem_ctx, struct samr_Password);
 426                 if (!nt_hash) {
 427                         return NULL;
 428                 }
 429
 430                 E_md4hash(password, nt_hash->hash);
 431
 432                 return nt_hash;
 433         } else {
 434                 return cred->nt_hash;
 435         }
 436 }
 437
 438 /**
 439  * Obtain the 'short' or 'NetBIOS' domain for this credentials context.
 440  * @param cred credentials context
 441  * @retval The domain set on this context.
 442  * @note Return value will never be NULL except by programmer error.
 443  */
 444 _PUBLIC_ const char *cli_credentials_get_domain(struct cli_credentials *cred)
 445 {
 446         if (cred->machine_account_pending) {
 447                 cli_credentials_set_machine_account(cred,
 448                                                     cred->machine_account_pending_lp_ctx);
 449         }
 450
 451         if (cred->domain_obtained == CRED_CALLBACK &&
 452             !cred->callback_running) {
 453                 cred->callback_running = true;
 454                 cred->domain = cred->domain_cb(cred);
 455                 cred->callback_running = false;
 456                 cred->domain_obtained = CRED_SPECIFIED;
 457                 cli_credentials_invalidate_ccache(cred, cred->domain_obtained);
 458         }
 459
 460         return cred->domain;
 461 }
 462
 463
 464 _PUBLIC_ bool cli_credentials_set_domain(struct cli_credentials *cred,
 465                                 const char *val,
 466                                 enum credentials_obtained obtained)
 467 {
 468         if (obtained >= cred->domain_obtained) {
 469                 /* it is important that the domain be in upper case,
 470                  * particularly for the sensitive NTLMv2
 471                  * calculations */
 472                 cred->domain = strupper_talloc(cred, val);
 473                 cred->domain_obtained = obtained;
 474                 cli_credentials_invalidate_ccache(cred, cred->domain_obtained);
 475                 return true;
 476         }
 477
 478         return false;
 479 }
 480
 481 bool cli_credentials_set_domain_callback(struct cli_credentials *cred,
 482                                          const char *(*domain_cb) (struct cli_credentials *))
 483 {
 484         if (cred->domain_obtained < CRED_CALLBACK) {
 485                 cred->domain_cb = domain_cb;
 486                 cred->domain_obtained = CRED_CALLBACK;
 487                 return true;
 488         }
 489
 490         return false;
 491 }
 492
 493 /**
 494  * Obtain the Kerberos realm for this credentials context.
 495  * @param cred credentials context
 496  * @retval The realm set on this context.
 497  * @note Return value will never be NULL except by programmer error.
 498  */
 499 _PUBLIC_ const char *cli_credentials_get_realm(struct cli_credentials *cred)
 500 {
 501         if (cred->machine_account_pending) {
 502                 cli_credentials_set_machine_account(cred,
 503                                                     cred->machine_account_pending_lp_ctx);
 504         }
 505
 506         if (cred->realm_obtained == CRED_CALLBACK &&
 507             !cred->callback_running) {
 508                 cred->callback_running = true;
 509                 cred->realm = cred->realm_cb(cred);
 510                 cred->callback_running = false;
 511                 cred->realm_obtained = CRED_SPECIFIED;
 512                 cli_credentials_invalidate_ccache(cred, cred->realm_obtained);
 513         }
 514
 515         return cred->realm;
 516 }
 517
 518 /**
 519  * Set the realm for this credentials context, and force it to
 520  * uppercase for the sainity of our local kerberos libraries
 521  */
 522 _PUBLIC_ bool cli_credentials_set_realm(struct cli_credentials *cred,
 523                                const char *val,
 524                                enum credentials_obtained obtained)
 525 {
 526         if (obtained >= cred->realm_obtained) {
 527                 cred->realm = strupper_talloc(cred, val);
 528                 cred->realm_obtained = obtained;
 529                 cli_credentials_invalidate_ccache(cred, cred->realm_obtained);
 530                 return true;
 531         }
 532
 533         return false;
 534 }
 535
 536 bool cli_credentials_set_realm_callback(struct cli_credentials *cred,
 537                                         const char *(*realm_cb) (struct cli_credentials *))
 538 {
 539         if (cred->realm_obtained < CRED_CALLBACK) {
 540                 cred->realm_cb = realm_cb;
 541                 cred->realm_obtained = CRED_CALLBACK;
 542                 return true;
 543         }
 544
 545         return false;
 546 }
 547
 548 /**
 549  * Obtain the 'short' or 'NetBIOS' workstation name for this credentials context.
 550  *
 551  * @param cred credentials context
 552  * @retval The workstation name set on this context.
 553  * @note Return value will never be NULL except by programmer error.
 554  */
 555 _PUBLIC_ const char *cli_credentials_get_workstation(struct cli_credentials *cred)
 556 {
 557         if (cred->workstation_obtained == CRED_CALLBACK &&
 558             !cred->callback_running) {
 559                 cred->callback_running = true;
 560                 cred->workstation = cred->workstation_cb(cred);
 561                 cred->callback_running = false;
 562                 cred->workstation_obtained = CRED_SPECIFIED;
 563         }
 564
 565         return cred->workstation;
 566 }
 567
 568 _PUBLIC_ bool cli_credentials_set_workstation(struct cli_credentials *cred,
 569                                      const char *val,
 570                                      enum credentials_obtained obtained)
 571 {
 572         if (obtained >= cred->workstation_obtained) {
 573                 cred->workstation = talloc_strdup(cred, val);
 574                 cred->workstation_obtained = obtained;
 575                 return true;
 576         }
 577
 578         return false;
 579 }
 580
 581 bool cli_credentials_set_workstation_callback(struct cli_credentials *cred,
 582                                               const char *(*workstation_cb) (struct cli_credentials *))
 583 {
 584         if (cred->workstation_obtained < CRED_CALLBACK) {
 585                 cred->workstation_cb = workstation_cb;
 586                 cred->workstation_obtained = CRED_CALLBACK;
 587                 return true;
 588         }
 589
 590         return false;
 591 }
 592
 593 /**
 594  * Given a string, typically obtained from a -U argument, parse it into domain, username, realm and password fields
 595  *
 596  * The format accepted is [domain\\]user[%password] or user[@realm][%password]
 597  *
 598  * @param credentials Credentials structure on which to set the password
 599  * @param data the string containing the username, password etc
 600  * @param obtained This enum describes how 'specified' this password is
 601  */
 602
 603 _PUBLIC_ void cli_credentials_parse_string(struct cli_credentials *credentials, const char *data, enum credentials_obtained obtained)
 604 {
 605         char *uname, *p;
 606
 607         if (strcmp("%",data) == 0) {
 608                 cli_credentials_set_anonymous(credentials);
 609                 return;
 610         }
 611
 612         uname = talloc_strdup(credentials, data);
 613         if ((p = strchr_m(uname,'%'))) {
 614                 *p = 0;
 615                 cli_credentials_set_password(credentials, p+1, obtained);
 616         }
 617
 618         if ((p = strchr_m(uname,'@'))) {
 619                 cli_credentials_set_principal(credentials, uname, obtained);
 620                 *p = 0;
 621                 cli_credentials_set_realm(credentials, p+1, obtained);
 622                 return;
 623         } else if ((p = strchr_m(uname,'\\')) || (p = strchr_m(uname, '/'))) {
 624                 *p = 0;
 625                 cli_credentials_set_domain(credentials, uname, obtained);
 626                 uname = p+1;
 627         }
 628         cli_credentials_set_username(credentials, uname, obtained);
 629 }
 630
 631 /**
 632  * Given a a credentials structure, print it as a string
 633  *
 634  * The format output is [domain\\]user[%password] or user[@realm][%password]
 635  *
 636  * @param credentials Credentials structure on which to set the password
 637  * @param mem_ctx The memory context to place the result on
 638  */
 639
 640 _PUBLIC_ const char *cli_credentials_get_unparsed_name(struct cli_credentials *credentials, TALLOC_CTX *mem_ctx)
 641 {
 642         const char *bind_dn = cli_credentials_get_bind_dn(credentials);
 643         const char *domain;
 644         const char *username;
 645         const char *name;
 646
 647         if (bind_dn) {
 648                 name = talloc_reference(mem_ctx, bind_dn);
 649         } else {
 650                 cli_credentials_get_ntlm_username_domain(credentials, mem_ctx, &username, &domain);
 651                 if (domain && domain[0]) {
 652                         name = talloc_asprintf(mem_ctx, "%s\\%s",
 653                                                domain, username);
 654                 } else {
 655                         name = talloc_asprintf(mem_ctx, "%s",
 656                                                username);
 657                 }
 658         }
 659         return name;
 660 }
 661
 662 /**
 663  * Specifies default values for domain, workstation and realm
 664  * from the smb.conf configuration file
 665  *
 666  * @param cred Credentials structure to fill in
 667  */
 668 _PUBLIC_ void cli_credentials_set_conf(struct cli_credentials *cred,
 669                               struct loadparm_context *lp_ctx)
 670 {
 671         cli_credentials_set_username(cred, "", CRED_UNINITIALISED);
 672         cli_credentials_set_domain(cred, lpcfg_workgroup(lp_ctx), CRED_UNINITIALISED);
 673         cli_credentials_set_workstation(cred, lpcfg_netbios_name(lp_ctx), CRED_UNINITIALISED);
 674         cli_credentials_set_realm(cred, lpcfg_realm(lp_ctx), CRED_UNINITIALISED);
 675 }
 676
 677 /**
 678  * Guess defaults for credentials from environment variables,
 679  * and from the configuration file
 680  *
 681  * @param cred Credentials structure to fill in
 682  */
 683 _PUBLIC_ void cli_credentials_guess(struct cli_credentials *cred,
 684                            struct loadparm_context *lp_ctx)
 685 {
 686         char *p;
 687         const char *error_string;
 688
 689         if (lp_ctx != NULL) {
 690                 cli_credentials_set_conf(cred, lp_ctx);
 691         }
 692
 693         if (getenv("LOGNAME")) {
 694                 cli_credentials_set_username(cred, getenv("LOGNAME"), CRED_GUESS_ENV);
 695         }
 696
 697         if (getenv("USER")) {
 698                 cli_credentials_parse_string(cred, getenv("USER"), CRED_GUESS_ENV);
 699                 if ((p = strchr_m(getenv("USER"),'%'))) {
 700                         memset(p,0,strlen(cred->password));
 701                 }
 702         }
 703
 704         if (getenv("PASSWD")) {
 705                 cli_credentials_set_password(cred, getenv("PASSWD"), CRED_GUESS_ENV);
 706         }
 707
 708         if (getenv("PASSWD_FD")) {
 709                 cli_credentials_parse_password_fd(cred, atoi(getenv("PASSWD_FD")),
 710                                                   CRED_GUESS_FILE);
 711         }
 712
 713         p = getenv("PASSWD_FILE");
 714         if (p && p[0]) {
 715                 cli_credentials_parse_password_file(cred, p, CRED_GUESS_FILE);
 716         }
 717
 718         if (cli_credentials_get_kerberos_state(cred) != CRED_DONT_USE_KERBEROS) {
 719                 cli_credentials_set_ccache(cred, event_context_find(cred), lp_ctx, NULL, CRED_GUESS_FILE,
 720                                            &error_string);
 721         }
 722 }
 723
 724 /**
 725  * Attach NETLOGON credentials for use with SCHANNEL
 726  */
 727
 728 _PUBLIC_ void cli_credentials_set_netlogon_creds(struct cli_credentials *cred,
 729                                                  struct netlogon_creds_CredentialState *netlogon_creds)
 730 {
 731         cred->netlogon_creds = talloc_reference(cred, netlogon_creds);
 732 }
 733
 734 /**
 735  * Return attached NETLOGON credentials
 736  */
 737
 738 struct netlogon_creds_CredentialState *cli_credentials_get_netlogon_creds(struct cli_credentials *cred)
 739 {
 740         return cred->netlogon_creds;
 741 }
 742
 743 /**
 744  * Set NETLOGON secure channel type
 745  */
 746
 747 _PUBLIC_ void cli_credentials_set_secure_channel_type(struct cli_credentials *cred,
 748                                              enum netr_SchannelType secure_channel_type)
 749 {
 750         cred->secure_channel_type = secure_channel_type;
 751 }
 752
 753 /**
 754  * Return NETLOGON secure chanel type
 755  */
 756
 757 _PUBLIC_ time_t cli_credentials_get_password_last_changed_time(struct cli_credentials *cred)
 758 {
 759         return cred->password_last_changed_time;
 760 }
 761
 762 /**
 763  * Set NETLOGON secure channel type
 764  */
 765
 766 _PUBLIC_ void cli_credentials_set_password_last_changed_time(struct cli_credentials *cred,
 767                                                              time_t last_changed_time)
 768 {
 769         cred->password_last_changed_time = last_changed_time;
 770 }
 771
 772 /**
 773  * Return NETLOGON secure chanel type
 774  */
 775
 776 _PUBLIC_ enum netr_SchannelType cli_credentials_get_secure_channel_type(struct cli_credentials *cred)
 777 {
 778         return cred->secure_channel_type;
 779 }
 780
 781 /**
 782  * Fill in a credentials structure as the anonymous user
 783  */
 784 _PUBLIC_ void cli_credentials_set_anonymous(struct cli_credentials *cred)
 785 {
 786         cli_credentials_set_username(cred, "", CRED_SPECIFIED);
 787         cli_credentials_set_domain(cred, "", CRED_SPECIFIED);
 788         cli_credentials_set_password(cred, NULL, CRED_SPECIFIED);
 789         cli_credentials_set_realm(cred, NULL, CRED_SPECIFIED);
 790         cli_credentials_set_workstation(cred, "", CRED_UNINITIALISED);
 791 }
 792
 793 /**
 794  * Describe a credentials context as anonymous or authenticated
 795  * @retval true if anonymous, false if a username is specified
 796  */
 797
 798 _PUBLIC_ bool cli_credentials_is_anonymous(struct cli_credentials *cred)
 799 {
 800         const char *username;
 801
 802         /* if bind dn is set it's not anonymous */
 803         if (cred->bind_dn) {
 804                 return false;
 805         }
 806
 807         if (cred->machine_account_pending) {
 808                 cli_credentials_set_machine_account(cred,
 809                                                     cred->machine_account_pending_lp_ctx);
 810         }
 811
 812         username = cli_credentials_get_username(cred);
 813
 814         /* Yes, it is deliberate that we die if we have a NULL pointer
 815          * here - anonymous is "", not NULL, which is 'never specified,
 816          * never guessed', ie programmer bug */
 817         if (!username[0]) {
 818                 return true;
 819         }
 820
 821         return false;
 822 }
 823
 824 /**
 825  * Mark the current password for a credentials struct as wrong. This will
 826  * cause the password to be prompted again (if a callback is set).
 827  *
 828  * This will decrement the number of times the password can be tried.
 829  *
 830  * @retval whether the credentials struct is finished
 831  */
 832 _PUBLIC_ bool cli_credentials_wrong_password(struct cli_credentials *cred)
 833 {
 834         if (cred->password_obtained != CRED_CALLBACK_RESULT) {
 835                 return false;
 836         }
 837
 838         cred->password_obtained = CRED_CALLBACK;
 839
 840         cred->tries--;
 841
 842         return (cred->tries > 0);
 843 }