source/utils/ntlm_auth.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind status program.
   5
   6    Copyright (C) Tim Potter      2000-2003
   7    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003-2004
   8    Copyright (C) Francesco Chemolli <kinkie@kame.usr.dsi.unimi.it> 2000
   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 2 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, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26
  27 #undef DBGC_CLASS
  28 #define DBGC_CLASS DBGC_WINBIND
  29
  30 #define SQUID_BUFFER_SIZE 2010
  31
  32 enum stdio_helper_mode {
  33         SQUID_2_4_BASIC,
  34         SQUID_2_5_BASIC,
  35         SQUID_2_5_NTLMSSP,
  36         NTLMSSP_CLIENT_1,
  37         GSS_SPNEGO_CLIENT,
  38         GSS_SPNEGO_SERVER,
  39         NTLM_SERVER_1,
  40         NUM_HELPER_MODES
  41 };
  42
  43 #define NTLM_AUTH_FLAG_USER_SESSION_KEY     0x0004
  44 #define NTLM_AUTH_FLAG_LMKEY                0x0008
  45
  46
  47 typedef void (*stdio_helper_function)(enum stdio_helper_mode stdio_helper_mode,
  48                                       char *buf, int length, void **private);
  49
  50 static void manage_squid_basic_request (enum stdio_helper_mode stdio_helper_mode,
  51                                         char *buf, int length, void **private);
  52
  53 static void manage_gensec_request (enum stdio_helper_mode stdio_helper_mode,
  54                                    char *buf, int length, void **private);
  55
  56 static void manage_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode,
  57                                           char *buf, int length, void **private);
  58
  59 static void manage_squid_request(enum stdio_helper_mode helper_mode,
  60                                  stdio_helper_function fn, void *private);
  61
  62 static const struct {
  63         enum stdio_helper_mode mode;
  64         const char *name;
  65         stdio_helper_function fn;
  66 } stdio_helper_protocols[] = {
  67         { SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
  68         { SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
  69         { SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request},
  70         { GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request},
  71         { GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request},
  72         { NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request},
  73         { NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
  74         { NUM_HELPER_MODES, NULL, NULL}
  75 };
  76
  77 extern int winbindd_fd;
  78
  79 const char *opt_username;
  80 const char *opt_domain;
  81 const char *opt_workstation;
  82 const char *opt_password;
  83
  84
  85 /* Copy of parse_domain_user from winbindd_util.c.  Parse a string of the
  86    form DOMAIN/user into a domain and a user */
  87
  88 static BOOL parse_ntlm_auth_domain_user(const char *domuser, fstring domain,
  89                                      fstring user)
  90 {
  91
  92         char *p = strchr(domuser,*lp_winbind_separator());
  93
  94         if (!p) {
  95                 return False;
  96         }
  97
  98         fstrcpy(user, p+1);
  99         fstrcpy(domain, domuser);
 100         domain[PTR_DIFF(p, domuser)] = 0;
 101
 102         return True;
 103 }
 104
 105 /* Authenticate a user with a plaintext password */
 106
 107 static BOOL check_plaintext_auth(const char *user, const char *pass,
 108                                  BOOL stdout_diagnostics)
 109 {
 110         return (strcmp(pass, opt_password) == 0);
 111 }
 112
 113 /* authenticate a user with an encrypted username/password */
 114
 115 static NTSTATUS local_pw_check_specified(const char *username,
 116                                          const char *domain,
 117                                          const char *workstation,
 118                                          const DATA_BLOB *challenge,
 119                                          const DATA_BLOB *lm_response,
 120                                          const DATA_BLOB *nt_response,
 121                                          uint32 flags,
 122                                          DATA_BLOB *lm_session_key,
 123                                          DATA_BLOB *user_session_key,
 124                                          char **error_string,
 125                                          char **unix_name)
 126 {
 127         NTSTATUS nt_status;
 128         uint8_t lm_pw[16], nt_pw[16];
 129         uint8_t *lm_pwd, *nt_pwd;
 130         TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
 131         if (!mem_ctx) {
 132                 nt_status = NT_STATUS_NO_MEMORY;
 133         } else {
 134
 135                 E_md4hash(opt_password, nt_pw);
 136                 if (E_deshash(opt_password, lm_pw)) {
 137                         lm_pwd = lm_pw;
 138                 } else {
 139                         lm_pwd = NULL;
 140                 }
 141                 nt_pwd = nt_pw;
 142
 143
 144                 nt_status = ntlm_password_check(mem_ctx,
 145                                                 challenge,
 146                                                 lm_response,
 147                                                 nt_response,
 148                                                 NULL, NULL,
 149                                                 username,
 150                                                 username,
 151                                                 domain,
 152                                                 lm_pwd, nt_pwd, user_session_key, lm_session_key);
 153
 154                 if (NT_STATUS_IS_OK(nt_status)) {
 155                         if (unix_name) {
 156                                 asprintf(unix_name,
 157                                          "%s%c%s", domain,
 158                                          *lp_winbind_separator(),
 159                                          username);
 160                         }
 161                 } else {
 162                         DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
 163                                   domain, username, workstation,
 164                                   nt_errstr(nt_status)));
 165                 }
 166                 talloc_destroy(mem_ctx);
 167         }
 168         if (error_string) {
 169                 *error_string = strdup(nt_errstr(nt_status));
 170         }
 171         return nt_status;
 172
 173
 174 }
 175
 176 static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode,
 177                                        char *buf, int length, void **private)
 178 {
 179         char *user, *pass;
 180         user=buf;
 181
 182         pass=memchr(buf,' ',length);
 183         if (!pass) {
 184                 DEBUG(2, ("Password not found. Denying access\n"));
 185                 x_fprintf(x_stdout, "ERR\n");
 186                 return;
 187         }
 188         *pass='\0';
 189         pass++;
 190
 191         if (stdio_helper_mode == SQUID_2_5_BASIC) {
 192                 rfc1738_unescape(user);
 193                 rfc1738_unescape(pass);
 194         }
 195
 196         if (check_plaintext_auth(user, pass, False)) {
 197                 x_fprintf(x_stdout, "OK\n");
 198         } else {
 199                 x_fprintf(x_stdout, "ERR\n");
 200         }
 201 }
 202
 203 /* This is a bit hairy, but the basic idea is to do a password callback
 204    to the calling application.  The callback comes from within gensec */
 205
 206 static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode,
 207                                          char *buf, int length, void **private)
 208 {
 209         DATA_BLOB in;
 210         struct gensec_security **gensec_state = (struct gensec_security **)private;
 211         if (strlen(buf) < 2) {
 212                 DEBUG(1, ("query [%s] invalid", buf));
 213                 x_fprintf(x_stdout, "BH\n");
 214                 return;
 215         }
 216
 217         if (strlen(buf) > 3) {
 218                 in = base64_decode_data_blob(buf + 3);
 219         } else {
 220                 in = data_blob(NULL, 0);
 221         }
 222
 223         if (strncmp(buf, "PW ", 3) == 0) {
 224
 225                 (*gensec_state)->password_callback_private = talloc_strndup((*gensec_state)->mem_ctx,
 226                                                                             (const char *)in.data, in.length);
 227
 228                 if ((*gensec_state)->password_callback_private == NULL) {
 229                         DEBUG(1, ("Out of memory\n"));
 230                         x_fprintf(x_stdout, "BH\n");
 231                         data_blob_free(&in);
 232                         return;
 233                 }
 234
 235                 x_fprintf(x_stdout, "OK\n");
 236                 data_blob_free(&in);
 237                 return;
 238         }
 239         DEBUG(1, ("Asked for (and expected) a password\n"));
 240         x_fprintf(x_stdout, "BH\n");
 241         data_blob_free(&in);
 242 }
 243
 244 /*
 245  * Callback for gensec, to ask the calling application for a password.  Uses the above function
 246  * for the stdio part of this.
 247  */
 248
 249 static NTSTATUS get_password(struct gensec_security *gensec_security, TALLOC_CTX *mem_ctx,
 250                              char **password)
 251 {
 252         *password = NULL;
 253
 254         /* Ask for a password */
 255         x_fprintf(x_stdout, "PW\n");
 256         gensec_security->password_callback_private = NULL;
 257
 258         manage_squid_request(NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, &gensec_security);
 259         *password = (char *)gensec_security->password_callback_private;
 260         if (*password) {
 261                 return NT_STATUS_OK;
 262         } else {
 263                 return NT_STATUS_INVALID_PARAMETER;
 264         }
 265 }
 266
 267 static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode,
 268                                   char *buf, int length, void **private)
 269 {
 270         DATA_BLOB in;
 271         DATA_BLOB out = data_blob(NULL, 0);
 272         char *out_base64 = NULL;
 273         const char *reply_arg = NULL;
 274         struct gensec_security **gensec_state = (struct gensec_security **)private;
 275         NTSTATUS nt_status;
 276         BOOL first = False;
 277         const char *reply_code;
 278
 279         if (strlen(buf) < 2) {
 280                 DEBUG(1, ("query [%s] invalid", buf));
 281                 x_fprintf(x_stdout, "BH\n");
 282                 return;
 283         }
 284
 285         if (strlen(buf) > 3) {
 286                 in = base64_decode_data_blob(buf + 3);
 287         } else {
 288                 in = data_blob(NULL, 0);
 289         }
 290
 291         if (strncmp(buf, "YR", 2) == 0) {
 292                 if (gensec_state && *gensec_state) {
 293                         gensec_end(gensec_state);
 294                         *gensec_state = NULL;
 295                 }
 296         } else if ( (strncmp(buf, "OK", 2) == 0)) {
 297                 /* do nothing */
 298                 data_blob_free(&in);
 299                 return;
 300         } else if ( (strncmp(buf, "TT ", 3) != 0) &&
 301                     (strncmp(buf, "KK ", 3) != 0) &&
 302                     (strncmp(buf, "AF ", 3) != 0) &&
 303                     (strncmp(buf, "NA ", 3) != 0) &&
 304                     (strncmp(buf, "PW ", 3) != 0)) {
 305                 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
 306                 x_fprintf(x_stdout, "BH\n");
 307                 data_blob_free(&in);
 308                 return;
 309         }
 310
 311         /* setup gensec */
 312         if (!(gensec_state && *gensec_state)) {
 313                 switch (stdio_helper_mode) {
 314                 case GSS_SPNEGO_CLIENT:
 315                 case NTLMSSP_CLIENT_1:
 316                         /* setup the client side */
 317
 318                         if (!NT_STATUS_IS_OK(gensec_client_start(gensec_state))) {
 319                                 exit(1);
 320                         }
 321                         gensec_set_username(*gensec_state, opt_username);
 322                         gensec_set_domain(*gensec_state, opt_domain);
 323                         if (opt_password) {
 324                                 if (!NT_STATUS_IS_OK(gensec_set_password(*gensec_state, opt_password))) {
 325                                         DEBUG(1, ("Out of memory\n"));
 326                                         x_fprintf(x_stdout, "BH\n");
 327                                         data_blob_free(&in);
 328                                         return;
 329                                 }
 330                         } else {
 331                                 gensec_set_password_callback(*gensec_state, get_password, NULL);
 332                         }
 333
 334                         break;
 335                 case GSS_SPNEGO_SERVER:
 336                 case SQUID_2_5_NTLMSSP:
 337                         if (!NT_STATUS_IS_OK(gensec_server_start(gensec_state))) {
 338                                 exit(1);
 339                         }
 340                         break;
 341                 default:
 342                         abort();
 343                 }
 344
 345                 switch (stdio_helper_mode) {
 346                 case GSS_SPNEGO_CLIENT:
 347                 case GSS_SPNEGO_SERVER:
 348                         nt_status = gensec_start_mech_by_oid(*gensec_state, OID_SPNEGO);
 349                         break;
 350                 case NTLMSSP_CLIENT_1:
 351                 case SQUID_2_5_NTLMSSP:
 352                         nt_status = gensec_start_mech_by_oid(*gensec_state, OID_NTLMSSP);
 353                         break;
 354                 default:
 355                         abort();
 356                 }
 357
 358                 if (!NT_STATUS_IS_OK(nt_status)) {
 359                         DEBUG(1, ("SPENGO login failed to initialise: %s\n", nt_errstr(nt_status)));
 360                         x_fprintf(x_stdout, "BH\n");
 361                         return;
 362                 }
 363                 if (!in.length) {
 364                         first = True;
 365                 }
 366         }
 367
 368         if (strncmp(buf, "PW ", 3) == 0) {
 369
 370                 if (!NT_STATUS_IS_OK(gensec_set_password(*gensec_state,
 371                                                          talloc_strndup((*gensec_state)->mem_ctx,
 372                                                                         (const char *)in.data,
 373                                                                         in.length)))) {
 374                         DEBUG(1, ("Out of memory\n"));
 375                         x_fprintf(x_stdout, "BH\n");
 376                         data_blob_free(&in);
 377                         return;
 378                 }
 379
 380                 x_fprintf(x_stdout, "OK\n");
 381                 data_blob_free(&in);
 382                 return;
 383         }
 384
 385         /* update */
 386
 387         nt_status = gensec_update(*gensec_state, NULL, in, &out);
 388
 389         /* don't leak 'bad password'/'no such user' info to the network client */
 390         nt_status = nt_status_squash(nt_status);
 391
 392         if (out.length) {
 393                 out_base64 = base64_encode_data_blob(out);
 394         } else {
 395                 out_base64 = NULL;
 396         }
 397         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 398                 reply_arg = "*";
 399                 if (first) {
 400                         reply_code = "YR";
 401                 } else if ((*gensec_state)->gensec_role == GENSEC_CLIENT) {
 402                         reply_code = "KK";
 403                 } else if ((*gensec_state)->gensec_role == GENSEC_SERVER) {
 404                         reply_code = "TT";
 405                 } else {
 406                         abort();
 407                 }
 408
 409
 410         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
 411                 reply_code = "BH";
 412                 reply_arg = nt_errstr(nt_status);
 413                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 414         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
 415                 reply_code = "BH";
 416                 reply_arg = nt_errstr(nt_status);
 417                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 418         } else if (!NT_STATUS_IS_OK(nt_status)) {
 419                 reply_code = "NA";
 420                 reply_arg = nt_errstr(nt_status);
 421                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 422         } else if /* OK */ ((*gensec_state)->gensec_role == GENSEC_SERVER) {
 423                 struct auth_session_info *session_info;
 424
 425                 nt_status = gensec_session_info(*gensec_state, &session_info);
 426                 if (!NT_STATUS_IS_OK(nt_status)) {
 427                         reply_code = "BH";
 428                         reply_arg = nt_errstr(nt_status);
 429                         DEBUG(1, ("GENSEC failed to retreive the session info: %s\n", nt_errstr(nt_status)));
 430                 } else {
 431
 432                         reply_code = "AF";
 433                         reply_arg = talloc_asprintf((*gensec_state)->mem_ctx,
 434                                                     "%s%s%s", session_info->server_info->domain,
 435                                                     lp_winbind_separator(), session_info->server_info->account_name);
 436                         talloc_destroy(session_info->mem_ctx);
 437                 }
 438         } else if ((*gensec_state)->gensec_role == GENSEC_CLIENT) {
 439                 reply_code = "AF";
 440                 reply_arg = NULL;
 441         } else {
 442                 abort();
 443         }
 444
 445         switch (stdio_helper_mode) {
 446         case GSS_SPNEGO_SERVER:
 447                 x_fprintf(x_stdout, "%s %s %s\n", reply_code,
 448                           out_base64 ? out_base64 : "*",
 449                           reply_arg ? reply_arg : "*");
 450
 451         default:
 452                 if (out_base64) {
 453                         x_fprintf(x_stdout, "%s %s\n", reply_code, out_base64);
 454                 } else if (reply_arg) {
 455                         x_fprintf(x_stdout, "%s %s\n", reply_code, reply_arg);
 456                 } else {
 457                         x_fprintf(x_stdout, "%s\n", reply_code);
 458                 }
 459         }
 460
 461         SAFE_FREE(out_base64);
 462         return;
 463 }
 464
 465 static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
 466                                          char *buf, int length, void **private)
 467 {
 468         char *request, *parameter;
 469         static DATA_BLOB challenge;
 470         static DATA_BLOB lm_response;
 471         static DATA_BLOB nt_response;
 472         static char *full_username;
 473         static char *username;
 474         static char *domain;
 475         static char *plaintext_password;
 476         static BOOL ntlm_server_1_user_session_key;
 477         static BOOL ntlm_server_1_lm_session_key;
 478
 479         if (strequal(buf, ".")) {
 480                 if (!full_username && !username) {
 481                         x_fprintf(x_stdout, "Error: No username supplied!\n");
 482                 } else if (plaintext_password) {
 483                         /* handle this request as plaintext */
 484                         if (!full_username) {
 485                                 if (asprintf(&full_username, "%s%c%s", domain, *lp_winbind_separator(), username) == -1) {
 486                                         x_fprintf(x_stdout, "Error: Out of memory in asprintf!\n.\n");
 487                                         return;
 488                                 }
 489                         }
 490                         if (check_plaintext_auth(full_username, plaintext_password, False)) {
 491                                 x_fprintf(x_stdout, "Authenticated: Yes\n");
 492                         } else {
 493                                 x_fprintf(x_stdout, "Authenticated: No\n");
 494                         }
 495                 } else if (!lm_response.data && !nt_response.data) {
 496                         x_fprintf(x_stdout, "Error: No password supplied!\n");
 497                 } else if (!challenge.data) {
 498                         x_fprintf(x_stdout, "Error: No lanman-challenge supplied!\n");
 499                 } else {
 500                         char *error_string = NULL;
 501                         DATA_BLOB lm_key;
 502                         DATA_BLOB user_session_key;
 503                         uint32 flags = 0;
 504
 505                         if (full_username && !username) {
 506                                 fstring fstr_user;
 507                                 fstring fstr_domain;
 508
 509                                 if (!parse_ntlm_auth_domain_user(full_username, fstr_user, fstr_domain)) {
 510                                         /* username might be 'tainted', don't print into our new-line deleimianted stream */
 511                                         x_fprintf(x_stdout, "Error: Could not parse into domain and username\n");
 512                                 }
 513                                 SAFE_FREE(username);
 514                                 SAFE_FREE(domain);
 515                                 username = smb_xstrdup(fstr_user);
 516                                 domain = smb_xstrdup(fstr_domain);
 517                         }
 518
 519                         if (!domain) {
 520                                 domain = smb_xstrdup(lp_workgroup());
 521                         }
 522
 523                         if (ntlm_server_1_lm_session_key)
 524                                 flags |= NTLM_AUTH_FLAG_LMKEY;
 525
 526                         if (ntlm_server_1_user_session_key)
 527                                 flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY;
 528
 529                         if (!NT_STATUS_IS_OK(
 530                                     local_pw_check_specified(username,
 531                                                               domain,
 532                                                               lp_netbios_name(),
 533                                                               &challenge,
 534                                                               &lm_response,
 535                                                               &nt_response,
 536                                                               flags,
 537                                                               &lm_key,
 538                                                               &user_session_key,
 539                                                               &error_string,
 540                                                               NULL))) {
 541
 542                                 x_fprintf(x_stdout, "Authenticated: No\n");
 543                                 x_fprintf(x_stdout, "Authentication-Error: %s\n.\n", error_string);
 544                                 SAFE_FREE(error_string);
 545                         } else {
 546                                 static char zeros[16];
 547                                 char *hex_lm_key;
 548                                 char *hex_user_session_key;
 549
 550                                 x_fprintf(x_stdout, "Authenticated: Yes\n");
 551
 552                                 if (ntlm_server_1_lm_session_key
 553                                     && lm_key.length
 554                                     && (memcmp(zeros, lm_key.data,
 555                                                                 lm_key.length) != 0)) {
 556                                         hex_encode(lm_key.data,
 557                                                    lm_key.length,
 558                                                    &hex_lm_key);
 559                                         x_fprintf(x_stdout, "LANMAN-Session-Key: %s\n", hex_lm_key);
 560                                         SAFE_FREE(hex_lm_key);
 561                                 }
 562
 563                                 if (ntlm_server_1_user_session_key
 564                                     && user_session_key.length
 565                                     && (memcmp(zeros, user_session_key.data,
 566                                                user_session_key.length) != 0)) {
 567                                         hex_encode(user_session_key.data,
 568                                                    user_session_key.length,
 569                                                    &hex_user_session_key);
 570                                         x_fprintf(x_stdout, "User-Session-Key: %s\n", hex_user_session_key);
 571                                         SAFE_FREE(hex_user_session_key);
 572                                 }
 573                         }
 574                 }
 575                 /* clear out the state */
 576                 challenge = data_blob(NULL, 0);
 577                 nt_response = data_blob(NULL, 0);
 578                 lm_response = data_blob(NULL, 0);
 579                 SAFE_FREE(full_username);
 580                 SAFE_FREE(username);
 581                 SAFE_FREE(domain);
 582                 SAFE_FREE(plaintext_password);
 583                 ntlm_server_1_user_session_key = False;
 584                 ntlm_server_1_lm_session_key = False;
 585                 x_fprintf(x_stdout, ".\n");
 586
 587                 return;
 588         }
 589
 590         request = buf;
 591
 592         /* Indicates a base64 encoded structure */
 593         parameter = strstr(request, ":: ");
 594         if (!parameter) {
 595                 parameter = strstr(request, ": ");
 596
 597                 if (!parameter) {
 598                         DEBUG(0, ("Parameter not found!\n"));
 599                         x_fprintf(x_stdout, "Error: Parameter not found!\n.\n");
 600                         return;
 601                 }
 602
 603                 parameter[0] ='\0';
 604                 parameter++;
 605                 parameter[0] ='\0';
 606                 parameter++;
 607
 608         } else {
 609                 parameter[0] ='\0';
 610                 parameter++;
 611                 parameter[0] ='\0';
 612                 parameter++;
 613                 parameter[0] ='\0';
 614                 parameter++;
 615
 616                 base64_decode_inplace(parameter);
 617         }
 618
 619         if (strequal(request, "LANMAN-Challenge")) {
 620                 challenge = strhex_to_data_blob(parameter);
 621                 if (challenge.length != 8) {
 622                         x_fprintf(x_stdout, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
 623                                   parameter,
 624                                   (int)challenge.length);
 625                         challenge = data_blob(NULL, 0);
 626                 }
 627         } else if (strequal(request, "NT-Response")) {
 628                 nt_response = strhex_to_data_blob(parameter);
 629                 if (nt_response.length < 24) {
 630                         x_fprintf(x_stdout, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
 631                                   parameter,
 632                                   (int)nt_response.length);
 633                         nt_response = data_blob(NULL, 0);
 634                 }
 635         } else if (strequal(request, "LANMAN-Response")) {
 636                 lm_response = strhex_to_data_blob(parameter);
 637                 if (lm_response.length != 24) {
 638                         x_fprintf(x_stdout, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
 639                                   parameter,
 640                                   (int)lm_response.length);
 641                         lm_response = data_blob(NULL, 0);
 642                 }
 643         } else if (strequal(request, "Password")) {
 644                 plaintext_password = smb_xstrdup(parameter);
 645         } else if (strequal(request, "NT-Domain")) {
 646                 domain = smb_xstrdup(parameter);
 647         } else if (strequal(request, "Username")) {
 648                 username = smb_xstrdup(parameter);
 649         } else if (strequal(request, "Full-Username")) {
 650                 full_username = smb_xstrdup(parameter);
 651         } else if (strequal(request, "Request-User-Session-Key")) {
 652                 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
 653         } else if (strequal(request, "Request-LanMan-Session-Key")) {
 654                 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
 655         } else {
 656                 x_fprintf(x_stdout, "Error: Unknown request %s\n.\n", request);
 657         }
 658 }
 659
 660 static void manage_squid_request(enum stdio_helper_mode helper_mode, stdio_helper_function fn, void *private)
 661 {
 662         char buf[SQUID_BUFFER_SIZE+1];
 663         int length;
 664         char *c;
 665         static BOOL err;
 666
 667         /* this is not a typo - x_fgets doesn't work too well under squid */
 668         if (fgets(buf, sizeof(buf)-1, stdin) == NULL) {
 669                 if (ferror(stdin)) {
 670                         DEBUG(1, ("fgets() failed! dying..... errno=%d (%s)\n", ferror(stdin),
 671                                   strerror(ferror(stdin))));
 672
 673                         exit(1);    /* BIIG buffer */
 674                 }
 675                 exit(0);
 676         }
 677
 678         c=memchr(buf,'\n',sizeof(buf)-1);
 679         if (c) {
 680                 *c = '\0';
 681                 length = c-buf;
 682         } else {
 683                 err = 1;
 684                 return;
 685         }
 686         if (err) {
 687                 DEBUG(2, ("Oversized message\n"));
 688                 x_fprintf(x_stderr, "ERR\n");
 689                 err = 0;
 690                 return;
 691         }
 692
 693         DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
 694
 695         if (buf[0] == '\0') {
 696                 DEBUG(2, ("Invalid Request\n"));
 697                 x_fprintf(x_stderr, "ERR\n");
 698                 return;
 699         }
 700
 701         fn(helper_mode, buf, length, private);
 702 }
 703
 704 static void squid_stream(enum stdio_helper_mode stdio_mode, stdio_helper_function fn) {
 705         void *private = NULL;
 706         /* initialize FDescs */
 707         x_setbuf(x_stdout, NULL);
 708         x_setbuf(x_stderr, NULL);
 709         while(1) {
 710                 manage_squid_request(stdio_mode, fn, &private);
 711         }
 712 }
 713
 714
 715 /* Main program */
 716
 717 enum {
 718         OPT_USERNAME = 1000,
 719         OPT_DOMAIN,
 720         OPT_WORKSTATION,
 721         OPT_CHALLENGE,
 722         OPT_RESPONSE,
 723         OPT_LM,
 724         OPT_NT,
 725         OPT_PASSWORD,
 726         OPT_LM_KEY,
 727         OPT_USER_SESSION_KEY,
 728         OPT_DIAGNOSTICS,
 729         OPT_REQUIRE_MEMBERSHIP
 730 };
 731
 732  int main(int argc, const char **argv)
 733 {
 734         static const char *helper_protocol;
 735         int opt;
 736
 737         poptContext pc;
 738
 739         /* NOTE: DO NOT change this interface without considering the implications!
 740            This is an external interface, which other programs will use to interact
 741            with this helper.
 742         */
 743
 744         /* We do not use single-letter command abbreviations, because they harm future
 745            interface stability. */
 746
 747         struct poptOption long_options[] = {
 748                 POPT_AUTOHELP
 749                 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
 750                 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
 751                 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
 752                 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"},
 753                 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
 754                 POPT_COMMON_SAMBA
 755                 POPT_TABLEEND
 756         };
 757
 758         /* Samba client initialisation */
 759
 760         setup_logging("ntlm_auth", DEBUG_STDOUT);
 761
 762         if (!lp_load(dyn_CONFIGFILE, True, False, False)) {
 763                 d_fprintf(stderr, "wbinfo: error opening config file %s. Error was %s\n",
 764                         dyn_CONFIGFILE, strerror(errno));
 765                 exit(1);
 766         }
 767
 768         /* Parse options */
 769
 770         pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
 771
 772         /* Parse command line options */
 773
 774         if (argc == 1) {
 775                 poptPrintHelp(pc, stderr, 0);
 776                 return 1;
 777         }
 778
 779         pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
 780                             POPT_CONTEXT_KEEP_FIRST);
 781
 782         while((opt = poptGetNextOpt(pc)) != -1) {
 783                 if (opt < -1) {
 784                         break;
 785                 }
 786         }
 787         if (opt < -1) {
 788                 fprintf(stderr, "%s: %s\n",
 789                         poptBadOption(pc, POPT_BADOPTION_NOALIAS),
 790                         poptStrerror(opt));
 791                 return 1;
 792         }
 793
 794         if (opt_domain == NULL) {
 795                 opt_domain = lp_workgroup();
 796         }
 797
 798         if (helper_protocol) {
 799                 int i;
 800                 for (i=0; i<NUM_HELPER_MODES; i++) {
 801                         if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
 802                                 squid_stream(stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
 803                                 exit(0);
 804                         }
 805                 }
 806                 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
 807
 808                 for (i=0; i<NUM_HELPER_MODES; i++) {
 809                         x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
 810                 }
 811
 812                 exit(1);
 813         }
 814
 815         if (!opt_username) {
 816                 x_fprintf(x_stderr, "username must be specified!\n\n");
 817                 poptPrintHelp(pc, stderr, 0);
 818                 exit(1);
 819         }
 820
 821         if (opt_workstation == NULL) {
 822                 opt_workstation = lp_netbios_name();
 823         }
 824
 825         if (!opt_password) {
 826                 opt_password = getpass("password: ");
 827         }
 828
 829         {
 830                 char *user;
 831
 832                 asprintf(&user, "%s%c%s", opt_domain, *lp_winbind_separator(), opt_username);
 833                 if (!check_plaintext_auth(user, opt_password, True)) {
 834                         return 1;
 835                 }
 836         }
 837
 838         /* Exit code */
 839
 840         poptFreeContext(pc);
 841         return 0;
 842 }