source4/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 #include "system/passwd.h"
  27 #include "lib/cmdline/popt_common.h"
  28 #include "auth/auth.h"
  29 #include "asn_1.h"
  30
  31 #undef DBGC_CLASS
  32 #define DBGC_CLASS DBGC_WINBIND
  33
  34 #define SQUID_BUFFER_SIZE 2010
  35
  36 enum stdio_helper_mode {
  37         SQUID_2_4_BASIC,
  38         SQUID_2_5_BASIC,
  39         SQUID_2_5_NTLMSSP,
  40         NTLMSSP_CLIENT_1,
  41         GSS_SPNEGO_CLIENT,
  42         GSS_SPNEGO_SERVER,
  43         NTLM_SERVER_1,
  44         NUM_HELPER_MODES
  45 };
  46
  47 #define NTLM_AUTH_FLAG_USER_SESSION_KEY     0x0004
  48 #define NTLM_AUTH_FLAG_LMKEY                0x0008
  49
  50
  51 typedef void (*stdio_helper_function)(enum stdio_helper_mode stdio_helper_mode,
  52                                       char *buf, int length, void **private);
  53
  54 static void manage_squid_basic_request (enum stdio_helper_mode stdio_helper_mode,
  55                                         char *buf, int length, void **private);
  56
  57 static void manage_gensec_request (enum stdio_helper_mode stdio_helper_mode,
  58                                    char *buf, int length, void **private);
  59
  60 static void manage_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode,
  61                                           char *buf, int length, void **private);
  62
  63 static void manage_squid_request(enum stdio_helper_mode helper_mode,
  64                                  stdio_helper_function fn, void *private);
  65
  66 static const struct {
  67         enum stdio_helper_mode mode;
  68         const char *name;
  69         stdio_helper_function fn;
  70 } stdio_helper_protocols[] = {
  71         { SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
  72         { SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
  73         { SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request},
  74         { GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request},
  75         { GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request},
  76         { NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request},
  77         { NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
  78         { NUM_HELPER_MODES, NULL, NULL}
  79 };
  80
  81 extern int winbindd_fd;
  82
  83 const char *opt_username;
  84 const char *opt_domain;
  85 const char *opt_workstation;
  86 const char *opt_password;
  87
  88
  89 /* Copy of parse_domain_user from winbindd_util.c.  Parse a string of the
  90    form DOMAIN/user into a domain and a user */
  91
  92 static BOOL parse_ntlm_auth_domain_user(const char *domuser, fstring domain,
  93                                      fstring user)
  94 {
  95
  96         char *p = strchr(domuser,*lp_winbind_separator());
  97
  98         if (!p) {
  99                 return False;
 100         }
 101
 102         fstrcpy(user, p+1);
 103         fstrcpy(domain, domuser);
 104         domain[PTR_DIFF(p, domuser)] = 0;
 105
 106         return True;
 107 }
 108
 109 /* Authenticate a user with a plaintext password */
 110
 111 static BOOL check_plaintext_auth(const char *user, const char *pass,
 112                                  BOOL stdout_diagnostics)
 113 {
 114         return (strcmp(pass, opt_password) == 0);
 115 }
 116
 117 /* authenticate a user with an encrypted username/password */
 118
 119 static NTSTATUS local_pw_check_specified(const char *username,
 120                                          const char *domain,
 121                                          const char *workstation,
 122                                          const DATA_BLOB *challenge,
 123                                          const DATA_BLOB *lm_response,
 124                                          const DATA_BLOB *nt_response,
 125                                          uint32 flags,
 126                                          DATA_BLOB *lm_session_key,
 127                                          DATA_BLOB *user_session_key,
 128                                          char **error_string,
 129                                          char **unix_name)
 130 {
 131         NTSTATUS nt_status;
 132         uint8_t lm_pw[16], nt_pw[16];
 133         uint8_t *lm_pwd, *nt_pwd;
 134         TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
 135         if (!mem_ctx) {
 136                 nt_status = NT_STATUS_NO_MEMORY;
 137         } else {
 138
 139                 E_md4hash(opt_password, nt_pw);
 140                 if (E_deshash(opt_password, lm_pw)) {
 141                         lm_pwd = lm_pw;
 142                 } else {
 143                         lm_pwd = NULL;
 144                 }
 145                 nt_pwd = nt_pw;
 146
 147
 148                 nt_status = ntlm_password_check(mem_ctx,
 149                                                 challenge,
 150                                                 lm_response,
 151                                                 nt_response,
 152                                                 NULL, NULL,
 153                                                 username,
 154                                                 username,
 155                                                 domain,
 156                                                 lm_pwd, nt_pwd, user_session_key, lm_session_key);
 157
 158                 if (NT_STATUS_IS_OK(nt_status)) {
 159                         if (unix_name) {
 160                                 asprintf(unix_name,
 161                                          "%s%c%s", domain,
 162                                          *lp_winbind_separator(),
 163                                          username);
 164                         }
 165                 } else {
 166                         DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
 167                                   domain, username, workstation,
 168                                   nt_errstr(nt_status)));
 169                 }
 170                 talloc_destroy(mem_ctx);
 171         }
 172         if (error_string) {
 173                 *error_string = strdup(nt_errstr(nt_status));
 174         }
 175         return nt_status;
 176
 177
 178 }
 179
 180 static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode,
 181                                        char *buf, int length, void **private)
 182 {
 183         char *user, *pass;
 184         user=buf;
 185
 186         pass=memchr(buf,' ',length);
 187         if (!pass) {
 188                 DEBUG(2, ("Password not found. Denying access\n"));
 189                 x_fprintf(x_stdout, "ERR\n");
 190                 return;
 191         }
 192         *pass='\0';
 193         pass++;
 194
 195         if (stdio_helper_mode == SQUID_2_5_BASIC) {
 196                 rfc1738_unescape(user);
 197                 rfc1738_unescape(pass);
 198         }
 199
 200         if (check_plaintext_auth(user, pass, False)) {
 201                 x_fprintf(x_stdout, "OK\n");
 202         } else {
 203                 x_fprintf(x_stdout, "ERR\n");
 204         }
 205 }
 206
 207 /* This is a bit hairy, but the basic idea is to do a password callback
 208    to the calling application.  The callback comes from within gensec */
 209
 210 static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode,
 211                                          char *buf, int length, void **private)
 212 {
 213         DATA_BLOB in;
 214         struct gensec_security **gensec_state = (struct gensec_security **)private;
 215         if (strlen(buf) < 2) {
 216                 DEBUG(1, ("query [%s] invalid", buf));
 217                 x_fprintf(x_stdout, "BH\n");
 218                 return;
 219         }
 220
 221         if (strlen(buf) > 3) {
 222                 in = base64_decode_data_blob(buf + 3);
 223         } else {
 224                 in = data_blob(NULL, 0);
 225         }
 226
 227         if (strncmp(buf, "PW ", 3) == 0) {
 228
 229                 (*gensec_state)->password_callback_private = talloc_strndup((*gensec_state),
 230                                                                             (const char *)in.data, in.length);
 231
 232                 if ((*gensec_state)->password_callback_private == NULL) {
 233                         DEBUG(1, ("Out of memory\n"));
 234                         x_fprintf(x_stdout, "BH\n");
 235                         data_blob_free(&in);
 236                         return;
 237                 }
 238
 239                 x_fprintf(x_stdout, "OK\n");
 240                 data_blob_free(&in);
 241                 return;
 242         }
 243         DEBUG(1, ("Asked for (and expected) a password\n"));
 244         x_fprintf(x_stdout, "BH\n");
 245         data_blob_free(&in);
 246 }
 247
 248 /*
 249  * Callback for gensec, to ask the calling application for a password.  Uses the above function
 250  * for the stdio part of this.
 251  */
 252
 253 static NTSTATUS get_password(struct gensec_security *gensec_security, TALLOC_CTX *mem_ctx,
 254                              char **password)
 255 {
 256         *password = NULL;
 257
 258         /* Ask for a password */
 259         x_fprintf(x_stdout, "PW\n");
 260         gensec_security->password_callback_private = NULL;
 261
 262         manage_squid_request(NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, &gensec_security);
 263         *password = (char *)gensec_security->password_callback_private;
 264         if (*password) {
 265                 return NT_STATUS_OK;
 266         } else {
 267                 return NT_STATUS_INVALID_PARAMETER;
 268         }
 269 }
 270
 271 static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode,
 272                                   char *buf, int length, void **private)
 273 {
 274         DATA_BLOB in;
 275         DATA_BLOB out = data_blob(NULL, 0);
 276         char *out_base64 = NULL;
 277         const char *reply_arg = NULL;
 278         struct gensec_security **gensec_state = (struct gensec_security **)private;
 279         NTSTATUS nt_status;
 280         BOOL first = False;
 281         const char *reply_code;
 282
 283         if (strlen(buf) < 2) {
 284                 DEBUG(1, ("query [%s] invalid", buf));
 285                 x_fprintf(x_stdout, "BH\n");
 286                 return;
 287         }
 288
 289         if (strlen(buf) > 3) {
 290                 in = base64_decode_data_blob(buf + 3);
 291         } else {
 292                 in = data_blob(NULL, 0);
 293         }
 294
 295         if (strncmp(buf, "YR", 2) == 0) {
 296                 if (gensec_state && *gensec_state) {
 297                         gensec_end(gensec_state);
 298                         *gensec_state = NULL;
 299                 }
 300         } else if ( (strncmp(buf, "OK", 2) == 0)) {
 301                 /* do nothing */
 302                 data_blob_free(&in);
 303                 return;
 304         } else if ( (strncmp(buf, "TT ", 3) != 0) &&
 305                     (strncmp(buf, "KK ", 3) != 0) &&
 306                     (strncmp(buf, "AF ", 3) != 0) &&
 307                     (strncmp(buf, "NA ", 3) != 0) &&
 308                     (strncmp(buf, "PW ", 3) != 0)) {
 309                 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
 310                 x_fprintf(x_stdout, "BH\n");
 311                 data_blob_free(&in);
 312                 return;
 313         }
 314
 315         /* setup gensec */
 316         if (!(gensec_state && *gensec_state)) {
 317                 switch (stdio_helper_mode) {
 318                 case GSS_SPNEGO_CLIENT:
 319                 case NTLMSSP_CLIENT_1:
 320                         /* setup the client side */
 321
 322                         if (!NT_STATUS_IS_OK(gensec_client_start(NULL, gensec_state))) {
 323                                 exit(1);
 324                         }
 325                         gensec_set_username(*gensec_state, opt_username);
 326                         gensec_set_domain(*gensec_state, opt_domain);
 327                         if (opt_password) {
 328                                 if (!NT_STATUS_IS_OK(gensec_set_password(*gensec_state, opt_password))) {
 329                                         DEBUG(1, ("Out of memory\n"));
 330                                         x_fprintf(x_stdout, "BH\n");
 331                                         data_blob_free(&in);
 332                                         return;
 333                                 }
 334                         } else {
 335                                 gensec_set_password_callback(*gensec_state, get_password, NULL);
 336                         }
 337
 338                         break;
 339                 case GSS_SPNEGO_SERVER:
 340                 case SQUID_2_5_NTLMSSP:
 341                         if (!NT_STATUS_IS_OK(gensec_server_start(NULL, gensec_state))) {
 342                                 exit(1);
 343                         }
 344                         break;
 345                 default:
 346                         abort();
 347                 }
 348
 349                 switch (stdio_helper_mode) {
 350                 case GSS_SPNEGO_CLIENT:
 351                 case GSS_SPNEGO_SERVER:
 352                         nt_status = gensec_start_mech_by_oid(*gensec_state, OID_SPNEGO);
 353                         break;
 354                 case NTLMSSP_CLIENT_1:
 355                 case SQUID_2_5_NTLMSSP:
 356                         nt_status = gensec_start_mech_by_oid(*gensec_state, OID_NTLMSSP);
 357                         break;
 358                 default:
 359                         abort();
 360                 }
 361
 362                 if (!NT_STATUS_IS_OK(nt_status)) {
 363                         DEBUG(1, ("SPENGO login failed to initialise: %s\n", nt_errstr(nt_status)));
 364                         x_fprintf(x_stdout, "BH\n");
 365                         return;
 366                 }
 367                 if (!in.length) {
 368                         first = True;
 369                 }
 370         }
 371
 372         if (strncmp(buf, "PW ", 3) == 0) {
 373
 374                 if (!NT_STATUS_IS_OK(gensec_set_password(*gensec_state,
 375                                                          talloc_strndup((*gensec_state),
 376                                                                         (const char *)in.data,
 377                                                                         in.length)))) {
 378                         DEBUG(1, ("Out of memory\n"));
 379                         x_fprintf(x_stdout, "BH\n");
 380                         data_blob_free(&in);
 381                         return;
 382                 }
 383
 384                 x_fprintf(x_stdout, "OK\n");
 385                 data_blob_free(&in);
 386                 return;
 387         }
 388
 389         /* update */
 390
 391         nt_status = gensec_update(*gensec_state, NULL, in, &out);
 392
 393         /* don't leak 'bad password'/'no such user' info to the network client */
 394         nt_status = nt_status_squash(nt_status);
 395
 396         if (out.length) {
 397                 out_base64 = base64_encode_data_blob(out);
 398         } else {
 399                 out_base64 = NULL;
 400         }
 401         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 402                 reply_arg = "*";
 403                 if (first) {
 404                         reply_code = "YR";
 405                 } else if ((*gensec_state)->gensec_role == GENSEC_CLIENT) {
 406                         reply_code = "KK";
 407                 } else if ((*gensec_state)->gensec_role == GENSEC_SERVER) {
 408                         reply_code = "TT";
 409                 } else {
 410                         abort();
 411                 }
 412
 413
 414         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
 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_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
 419                 reply_code = "BH";
 420                 reply_arg = nt_errstr(nt_status);
 421                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 422         } else if (!NT_STATUS_IS_OK(nt_status)) {
 423                 reply_code = "NA";
 424                 reply_arg = nt_errstr(nt_status);
 425                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 426         } else if /* OK */ ((*gensec_state)->gensec_role == GENSEC_SERVER) {
 427                 struct auth_session_info *session_info;
 428
 429                 nt_status = gensec_session_info(*gensec_state, &session_info);
 430                 if (!NT_STATUS_IS_OK(nt_status)) {
 431                         reply_code = "BH";
 432                         reply_arg = nt_errstr(nt_status);
 433                         DEBUG(1, ("GENSEC failed to retreive the session info: %s\n", nt_errstr(nt_status)));
 434                 } else {
 435
 436                         reply_code = "AF";
 437                         reply_arg = talloc_asprintf(*gensec_state,
 438                                                     "%s%s%s", session_info->server_info->domain,
 439                                                     lp_winbind_separator(), session_info->server_info->account_name);
 440                         talloc_free(session_info);
 441                 }
 442         } else if ((*gensec_state)->gensec_role == GENSEC_CLIENT) {
 443                 reply_code = "AF";
 444                 reply_arg = NULL;
 445         } else {
 446                 abort();
 447         }
 448
 449         switch (stdio_helper_mode) {
 450         case GSS_SPNEGO_SERVER:
 451                 x_fprintf(x_stdout, "%s %s %s\n", reply_code,
 452                           out_base64 ? out_base64 : "*",
 453                           reply_arg ? reply_arg : "*");
 454                 break;
 455         default:
 456                 if (out_base64) {
 457                         x_fprintf(x_stdout, "%s %s\n", reply_code, out_base64);
 458                 } else if (reply_arg) {
 459                         x_fprintf(x_stdout, "%s %s\n", reply_code, reply_arg);
 460                 } else {
 461                         x_fprintf(x_stdout, "%s\n", reply_code);
 462                 }
 463         }
 464
 465         SAFE_FREE(out_base64);
 466         return;
 467 }
 468
 469 static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
 470                                          char *buf, int length, void **private)
 471 {
 472         char *request, *parameter;
 473         static DATA_BLOB challenge;
 474         static DATA_BLOB lm_response;
 475         static DATA_BLOB nt_response;
 476         static char *full_username;
 477         static char *username;
 478         static char *domain;
 479         static char *plaintext_password;
 480         static BOOL ntlm_server_1_user_session_key;
 481         static BOOL ntlm_server_1_lm_session_key;
 482
 483         if (strequal(buf, ".")) {
 484                 if (!full_username && !username) {
 485                         x_fprintf(x_stdout, "Error: No username supplied!\n");
 486                 } else if (plaintext_password) {
 487                         /* handle this request as plaintext */
 488                         if (!full_username) {
 489                                 if (asprintf(&full_username, "%s%c%s", domain, *lp_winbind_separator(), username) == -1) {
 490                                         x_fprintf(x_stdout, "Error: Out of memory in asprintf!\n.\n");
 491                                         return;
 492                                 }
 493                         }
 494                         if (check_plaintext_auth(full_username, plaintext_password, False)) {
 495                                 x_fprintf(x_stdout, "Authenticated: Yes\n");
 496                         } else {
 497                                 x_fprintf(x_stdout, "Authenticated: No\n");
 498                         }
 499                 } else if (!lm_response.data && !nt_response.data) {
 500                         x_fprintf(x_stdout, "Error: No password supplied!\n");
 501                 } else if (!challenge.data) {
 502                         x_fprintf(x_stdout, "Error: No lanman-challenge supplied!\n");
 503                 } else {
 504                         char *error_string = NULL;
 505                         DATA_BLOB lm_key;
 506                         DATA_BLOB user_session_key;
 507                         uint32 flags = 0;
 508
 509                         if (full_username && !username) {
 510                                 fstring fstr_user;
 511                                 fstring fstr_domain;
 512
 513                                 if (!parse_ntlm_auth_domain_user(full_username, fstr_user, fstr_domain)) {
 514                                         /* username might be 'tainted', don't print into our new-line deleimianted stream */
 515                                         x_fprintf(x_stdout, "Error: Could not parse into domain and username\n");
 516                                 }
 517                                 SAFE_FREE(username);
 518                                 SAFE_FREE(domain);
 519                                 username = smb_xstrdup(fstr_user);
 520                                 domain = smb_xstrdup(fstr_domain);
 521                         }
 522
 523                         if (!domain) {
 524                                 domain = smb_xstrdup(lp_workgroup());
 525                         }
 526
 527                         if (ntlm_server_1_lm_session_key)
 528                                 flags |= NTLM_AUTH_FLAG_LMKEY;
 529
 530                         if (ntlm_server_1_user_session_key)
 531                                 flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY;
 532
 533                         if (!NT_STATUS_IS_OK(
 534                                     local_pw_check_specified(username,
 535                                                               domain,
 536                                                               lp_netbios_name(),
 537                                                               &challenge,
 538                                                               &lm_response,
 539                                                               &nt_response,
 540                                                               flags,
 541                                                               &lm_key,
 542                                                               &user_session_key,
 543                                                               &error_string,
 544                                                               NULL))) {
 545
 546                                 x_fprintf(x_stdout, "Authenticated: No\n");
 547                                 x_fprintf(x_stdout, "Authentication-Error: %s\n.\n", error_string);
 548                                 SAFE_FREE(error_string);
 549                         } else {
 550                                 static char zeros[16];
 551                                 char *hex_lm_key;
 552                                 char *hex_user_session_key;
 553
 554                                 x_fprintf(x_stdout, "Authenticated: Yes\n");
 555
 556                                 if (ntlm_server_1_lm_session_key
 557                                     && lm_key.length
 558                                     && (memcmp(zeros, lm_key.data,
 559                                                                 lm_key.length) != 0)) {
 560                                         hex_encode(lm_key.data,
 561                                                    lm_key.length,
 562                                                    &hex_lm_key);
 563                                         x_fprintf(x_stdout, "LANMAN-Session-Key: %s\n", hex_lm_key);
 564                                         SAFE_FREE(hex_lm_key);
 565                                 }
 566
 567                                 if (ntlm_server_1_user_session_key
 568                                     && user_session_key.length
 569                                     && (memcmp(zeros, user_session_key.data,
 570                                                user_session_key.length) != 0)) {
 571                                         hex_encode(user_session_key.data,
 572                                                    user_session_key.length,
 573                                                    &hex_user_session_key);
 574                                         x_fprintf(x_stdout, "User-Session-Key: %s\n", hex_user_session_key);
 575                                         SAFE_FREE(hex_user_session_key);
 576                                 }
 577                         }
 578                 }
 579                 /* clear out the state */
 580                 challenge = data_blob(NULL, 0);
 581                 nt_response = data_blob(NULL, 0);
 582                 lm_response = data_blob(NULL, 0);
 583                 SAFE_FREE(full_username);
 584                 SAFE_FREE(username);
 585                 SAFE_FREE(domain);
 586                 SAFE_FREE(plaintext_password);
 587                 ntlm_server_1_user_session_key = False;
 588                 ntlm_server_1_lm_session_key = False;
 589                 x_fprintf(x_stdout, ".\n");
 590
 591                 return;
 592         }
 593
 594         request = buf;
 595
 596         /* Indicates a base64 encoded structure */
 597         parameter = strstr(request, ":: ");
 598         if (!parameter) {
 599                 parameter = strstr(request, ": ");
 600
 601                 if (!parameter) {
 602                         DEBUG(0, ("Parameter not found!\n"));
 603                         x_fprintf(x_stdout, "Error: Parameter not found!\n.\n");
 604                         return;
 605                 }
 606
 607                 parameter[0] ='\0';
 608                 parameter++;
 609                 parameter[0] ='\0';
 610                 parameter++;
 611
 612         } else {
 613                 parameter[0] ='\0';
 614                 parameter++;
 615                 parameter[0] ='\0';
 616                 parameter++;
 617                 parameter[0] ='\0';
 618                 parameter++;
 619
 620                 base64_decode_inplace(parameter);
 621         }
 622
 623         if (strequal(request, "LANMAN-Challenge")) {
 624                 challenge = strhex_to_data_blob(parameter);
 625                 if (challenge.length != 8) {
 626                         x_fprintf(x_stdout, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
 627                                   parameter,
 628                                   (int)challenge.length);
 629                         challenge = data_blob(NULL, 0);
 630                 }
 631         } else if (strequal(request, "NT-Response")) {
 632                 nt_response = strhex_to_data_blob(parameter);
 633                 if (nt_response.length < 24) {
 634                         x_fprintf(x_stdout, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
 635                                   parameter,
 636                                   (int)nt_response.length);
 637                         nt_response = data_blob(NULL, 0);
 638                 }
 639         } else if (strequal(request, "LANMAN-Response")) {
 640                 lm_response = strhex_to_data_blob(parameter);
 641                 if (lm_response.length != 24) {
 642                         x_fprintf(x_stdout, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
 643                                   parameter,
 644                                   (int)lm_response.length);
 645                         lm_response = data_blob(NULL, 0);
 646                 }
 647         } else if (strequal(request, "Password")) {
 648                 plaintext_password = smb_xstrdup(parameter);
 649         } else if (strequal(request, "NT-Domain")) {
 650                 domain = smb_xstrdup(parameter);
 651         } else if (strequal(request, "Username")) {
 652                 username = smb_xstrdup(parameter);
 653         } else if (strequal(request, "Full-Username")) {
 654                 full_username = smb_xstrdup(parameter);
 655         } else if (strequal(request, "Request-User-Session-Key")) {
 656                 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
 657         } else if (strequal(request, "Request-LanMan-Session-Key")) {
 658                 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
 659         } else {
 660                 x_fprintf(x_stdout, "Error: Unknown request %s\n.\n", request);
 661         }
 662 }
 663
 664 static void manage_squid_request(enum stdio_helper_mode helper_mode, stdio_helper_function fn, void *private)
 665 {
 666         char buf[SQUID_BUFFER_SIZE+1];
 667         int length;
 668         char *c;
 669         static BOOL err;
 670
 671         /* this is not a typo - x_fgets doesn't work too well under squid */
 672         if (fgets(buf, sizeof(buf)-1, stdin) == NULL) {
 673                 if (ferror(stdin)) {
 674                         DEBUG(1, ("fgets() failed! dying..... errno=%d (%s)\n", ferror(stdin),
 675                                   strerror(ferror(stdin))));
 676
 677                         exit(1);    /* BIIG buffer */
 678                 }
 679                 exit(0);
 680         }
 681
 682         c=memchr(buf,'\n',sizeof(buf)-1);
 683         if (c) {
 684                 *c = '\0';
 685                 length = c-buf;
 686         } else {
 687                 err = 1;
 688                 return;
 689         }
 690         if (err) {
 691                 DEBUG(2, ("Oversized message\n"));
 692                 x_fprintf(x_stderr, "ERR\n");
 693                 err = 0;
 694                 return;
 695         }
 696
 697         DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
 698
 699         if (buf[0] == '\0') {
 700                 DEBUG(2, ("Invalid Request\n"));
 701                 x_fprintf(x_stderr, "ERR\n");
 702                 return;
 703         }
 704
 705         fn(helper_mode, buf, length, private);
 706 }
 707
 708 static void squid_stream(enum stdio_helper_mode stdio_mode, stdio_helper_function fn) {
 709         void *private = NULL;
 710         /* initialize FDescs */
 711         x_setbuf(x_stdout, NULL);
 712         x_setbuf(x_stderr, NULL);
 713         while(1) {
 714                 manage_squid_request(stdio_mode, fn, &private);
 715         }
 716 }
 717
 718
 719 /* Main program */
 720
 721 enum {
 722         OPT_USERNAME = 1000,
 723         OPT_DOMAIN,
 724         OPT_WORKSTATION,
 725         OPT_CHALLENGE,
 726         OPT_RESPONSE,
 727         OPT_LM,
 728         OPT_NT,
 729         OPT_PASSWORD,
 730         OPT_LM_KEY,
 731         OPT_USER_SESSION_KEY,
 732         OPT_DIAGNOSTICS,
 733         OPT_REQUIRE_MEMBERSHIP
 734 };
 735
 736  int main(int argc, const char **argv)
 737 {
 738         static const char *helper_protocol;
 739         int opt;
 740
 741         poptContext pc;
 742
 743         /* NOTE: DO NOT change this interface without considering the implications!
 744            This is an external interface, which other programs will use to interact
 745            with this helper.
 746         */
 747
 748         /* We do not use single-letter command abbreviations, because they harm future
 749            interface stability. */
 750
 751         struct poptOption long_options[] = {
 752                 POPT_AUTOHELP
 753                 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
 754                 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
 755                 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
 756                 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"},
 757                 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
 758                 POPT_COMMON_SAMBA
 759                 POPT_TABLEEND
 760         };
 761
 762         /* Samba client initialisation */
 763
 764         setup_logging("ntlm_auth", DEBUG_STDERR);
 765
 766         if (!lp_load(dyn_CONFIGFILE, True, False, False)) {
 767                 d_fprintf(stderr, "wbinfo: error opening config file %s. Error was %s\n",
 768                         dyn_CONFIGFILE, strerror(errno));
 769                 exit(1);
 770         }
 771
 772         /* Parse options */
 773
 774         pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
 775
 776         /* Parse command line options */
 777
 778         if (argc == 1) {
 779                 poptPrintHelp(pc, stderr, 0);
 780                 return 1;
 781         }
 782
 783         pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
 784                             POPT_CONTEXT_KEEP_FIRST);
 785
 786         while((opt = poptGetNextOpt(pc)) != -1) {
 787                 if (opt < -1) {
 788                         break;
 789                 }
 790         }
 791         if (opt < -1) {
 792                 fprintf(stderr, "%s: %s\n",
 793                         poptBadOption(pc, POPT_BADOPTION_NOALIAS),
 794                         poptStrerror(opt));
 795                 return 1;
 796         }
 797
 798         if (opt_domain == NULL) {
 799                 opt_domain = lp_workgroup();
 800         }
 801
 802         if (helper_protocol) {
 803                 int i;
 804                 for (i=0; i<NUM_HELPER_MODES; i++) {
 805                         if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
 806                                 squid_stream(stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
 807                                 exit(0);
 808                         }
 809                 }
 810                 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
 811
 812                 for (i=0; i<NUM_HELPER_MODES; i++) {
 813                         x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
 814                 }
 815
 816                 exit(1);
 817         }
 818
 819         if (!opt_username) {
 820                 x_fprintf(x_stderr, "username must be specified!\n\n");
 821                 poptPrintHelp(pc, stderr, 0);
 822                 exit(1);
 823         }
 824
 825         if (opt_workstation == NULL) {
 826                 opt_workstation = lp_netbios_name();
 827         }
 828
 829         if (!opt_password) {
 830                 opt_password = getpass("password: ");
 831         }
 832
 833         {
 834                 char *user;
 835
 836                 asprintf(&user, "%s%c%s", opt_domain, *lp_winbind_separator(), opt_username);
 837                 if (!check_plaintext_auth(user, opt_password, True)) {
 838                         return 1;
 839                 }
 840         }
 841
 842         /* Exit code */
 843
 844         poptFreeContext(pc);
 845         return 0;
 846 }