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 #include "system/filesys.h"
  27 #include "lib/cmdline/popt_common.h"
  28 #include "auth/auth.h"
  29 #include "pstring.h"
  30 #include "smb_build.h"
  31
  32 #define SQUID_BUFFER_SIZE 2010
  33
  34 enum stdio_helper_mode {
  35         SQUID_2_4_BASIC,
  36         SQUID_2_5_BASIC,
  37         SQUID_2_5_NTLMSSP,
  38         NTLMSSP_CLIENT_1,
  39         GSS_SPNEGO_CLIENT,
  40         GSS_SPNEGO_SERVER,
  41         NTLM_SERVER_1,
  42         NUM_HELPER_MODES
  43 };
  44
  45 #define NTLM_AUTH_FLAG_USER_SESSION_KEY     0x0004
  46 #define NTLM_AUTH_FLAG_LMKEY                0x0008
  47
  48
  49 typedef void (*stdio_helper_function)(enum stdio_helper_mode stdio_helper_mode,
  50                                       char *buf, int length, void **private,
  51                                       unsigned int mux_id, void **private2);
  52
  53 static void manage_squid_basic_request (enum stdio_helper_mode stdio_helper_mode,
  54                                         char *buf, int length, void **private,
  55                                         unsigned int mux_id, void **private2);
  56
  57 static void manage_gensec_request (enum stdio_helper_mode stdio_helper_mode,
  58                                    char *buf, int length, void **private,
  59                                    unsigned int mux_id, void **private2);
  60
  61 static void manage_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode,
  62                                           char *buf, int length, void **private,
  63                                           unsigned int mux_id, void **private2);
  64
  65 static void manage_squid_request(enum stdio_helper_mode helper_mode,
  66                                  stdio_helper_function fn, void **private2);
  67
  68 static const struct {
  69         enum stdio_helper_mode mode;
  70         const char *name;
  71         stdio_helper_function fn;
  72 } stdio_helper_protocols[] = {
  73         { SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
  74         { SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
  75         { SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request},
  76         { GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request},
  77         { GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request},
  78         { NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request},
  79         { NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
  80         { NUM_HELPER_MODES, NULL, NULL}
  81 };
  82
  83 extern int winbindd_fd;
  84
  85 static const char *opt_username;
  86 static const char *opt_domain;
  87 static const char *opt_workstation;
  88 static const char *opt_password;
  89 static int opt_multiplex;
  90
  91
  92 static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
  93
  94 static void mux_printf(unsigned int mux_id, const char *format, ...)
  95 {
  96         va_list ap;
  97
  98         if (opt_multiplex) {
  99                 x_fprintf(x_stdout, "%d ", mux_id);
 100         }
 101
 102         va_start(ap, format);
 103         x_vfprintf(x_stdout, format, ap);
 104         va_end(ap);
 105 }
 106
 107
 108
 109 /* Copy of parse_domain_user from winbindd_util.c.  Parse a string of the
 110    form DOMAIN/user into a domain and a user */
 111
 112 static BOOL parse_ntlm_auth_domain_user(const char *domuser, fstring domain,
 113                                         fstring user)
 114 {
 115
 116         char *p = strchr(domuser,*lp_winbind_separator());
 117
 118         if (!p) {
 119                 return False;
 120         }
 121
 122         fstrcpy(user, p+1);
 123         fstrcpy(domain, domuser);
 124         domain[PTR_DIFF(p, domuser)] = 0;
 125
 126         return True;
 127 }
 128
 129 /* Authenticate a user with a plaintext password */
 130
 131 static BOOL check_plaintext_auth(const char *user, const char *pass,
 132                                  BOOL stdout_diagnostics)
 133 {
 134         return (strcmp(pass, opt_password) == 0);
 135 }
 136
 137 /* authenticate a user with an encrypted username/password */
 138
 139 static NTSTATUS local_pw_check_specified(const char *username,
 140                                          const char *domain,
 141                                          const char *workstation,
 142                                          const DATA_BLOB *challenge,
 143                                          const DATA_BLOB *lm_response,
 144                                          const DATA_BLOB *nt_response,
 145                                          uint32_t flags,
 146                                          DATA_BLOB *lm_session_key,
 147                                          DATA_BLOB *user_session_key,
 148                                          char **error_string,
 149                                          char **unix_name)
 150 {
 151         NTSTATUS nt_status;
 152         struct samr_Password lm_pw, nt_pw;
 153         struct samr_Password *lm_pwd, *nt_pwd;
 154         TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
 155         if (!mem_ctx) {
 156                 nt_status = NT_STATUS_NO_MEMORY;
 157         } else {
 158
 159                 E_md4hash(opt_password, nt_pw.hash);
 160                 if (E_deshash(opt_password, lm_pw.hash)) {
 161                         lm_pwd = &lm_pw;
 162                 } else {
 163                         lm_pwd = NULL;
 164                 }
 165                 nt_pwd = &nt_pw;
 166
 167
 168                 nt_status = ntlm_password_check(mem_ctx,
 169                                                 MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT |
 170                                                 MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
 171                                                 challenge,
 172                                                 lm_response,
 173                                                 nt_response,
 174                                                 username,
 175                                                 username,
 176                                                 domain,
 177                                                 lm_pwd, nt_pwd, user_session_key, lm_session_key);
 178
 179                 if (NT_STATUS_IS_OK(nt_status)) {
 180                         if (unix_name) {
 181                                 asprintf(unix_name,
 182                                          "%s%c%s", domain,
 183                                          *lp_winbind_separator(),
 184                                          username);
 185                         }
 186                 } else {
 187                         DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
 188                                   domain, username, workstation,
 189                                   nt_errstr(nt_status)));
 190                 }
 191                 talloc_free(mem_ctx);
 192         }
 193         if (error_string) {
 194                 *error_string = strdup(nt_errstr(nt_status));
 195         }
 196         return nt_status;
 197
 198
 199 }
 200
 201 static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode,
 202                                        char *buf, int length, void **private,
 203                                        unsigned int mux_id, void **private2)
 204 {
 205         char *user, *pass;
 206         user=buf;
 207
 208         pass=memchr(buf,' ',length);
 209         if (!pass) {
 210                 DEBUG(2, ("Password not found. Denying access\n"));
 211                 mux_printf(mux_id, "ERR\n");
 212                 return;
 213         }
 214         *pass='\0';
 215         pass++;
 216
 217         if (stdio_helper_mode == SQUID_2_5_BASIC) {
 218                 rfc1738_unescape(user);
 219                 rfc1738_unescape(pass);
 220         }
 221
 222         if (check_plaintext_auth(user, pass, False)) {
 223                 mux_printf(mux_id, "OK\n");
 224         } else {
 225                 mux_printf(mux_id, "ERR\n");
 226         }
 227 }
 228
 229 /* This is a bit hairy, but the basic idea is to do a password callback
 230    to the calling application.  The callback comes from within gensec */
 231
 232 static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode,
 233                                          char *buf, int length, void **private,
 234                                          unsigned int mux_id, void **password)
 235 {
 236         DATA_BLOB in;
 237         if (strlen(buf) < 2) {
 238                 DEBUG(1, ("query [%s] invalid", buf));
 239                 mux_printf(mux_id, "BH\n");
 240                 return;
 241         }
 242
 243         if (strlen(buf) > 3) {
 244                 in = base64_decode_data_blob(NULL, buf + 3);
 245         } else {
 246                 in = data_blob(NULL, 0);
 247         }
 248
 249         if (strncmp(buf, "PW ", 3) == 0) {
 250
 251                 *password = talloc_strndup(*private /* hopefully the right gensec context, useful to use for talloc */,
 252                                            (const char *)in.data, in.length);
 253
 254                 if (*password == NULL) {
 255                         DEBUG(1, ("Out of memory\n"));
 256                         mux_printf(mux_id, "BH\n");
 257                         data_blob_free(&in);
 258                         return;
 259                 }
 260
 261                 mux_printf(mux_id, "OK\n");
 262                 data_blob_free(&in);
 263                 return;
 264         }
 265         DEBUG(1, ("Asked for (and expected) a password\n"));
 266         mux_printf(mux_id, "BH\n");
 267         data_blob_free(&in);
 268 }
 269
 270 /**
 271  * Callback for password credentails.  This is not async, and when
 272  * GENSEC and the credentails code is made async, it will look rather
 273  * different.
 274  */
 275
 276 static const char *get_password(struct cli_credentials *credentials)
 277 {
 278         char *password = NULL;
 279
 280         /* Ask for a password */
 281         mux_printf((unsigned int)credentials->priv_data, "PW\n");
 282         credentials->priv_data = NULL;
 283
 284         manage_squid_request(NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, (void **)&password);
 285         return password;
 286 }
 287
 288 static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode,
 289                                   char *buf, int length, void **private,
 290                                   unsigned int mux_id, void **private2)
 291 {
 292         DATA_BLOB in;
 293         DATA_BLOB out = data_blob(NULL, 0);
 294         char *out_base64 = NULL;
 295         const char *reply_arg = NULL;
 296         struct gensec_ntlm_state {
 297                 struct gensec_security *gensec_state;
 298                 const char *set_password;
 299         };
 300         struct gensec_ntlm_state *state;
 301
 302         NTSTATUS nt_status;
 303         BOOL first = False;
 304         const char *reply_code;
 305         struct cli_credentials *creds;
 306
 307         TALLOC_CTX *mem_ctx;
 308
 309         if (*private) {
 310                 state = *private;
 311         } else {
 312                 state = talloc_zero(NULL, struct gensec_ntlm_state);
 313                 if (!state) {
 314                         mux_printf(mux_id, "BH No Memory\n");
 315                         exit(1);
 316                 }
 317                 *private = state;
 318                 if (opt_password) {
 319                         state->set_password = opt_password;
 320                 }
 321         }
 322
 323         if (strlen(buf) < 2) {
 324                 DEBUG(1, ("query [%s] invalid", buf));
 325                 mux_printf(mux_id, "BH\n");
 326                 return;
 327         }
 328
 329         if (strlen(buf) > 3) {
 330                 in = base64_decode_data_blob(NULL, buf + 3);
 331         } else {
 332                 in = data_blob(NULL, 0);
 333         }
 334
 335         if (strncmp(buf, "YR", 2) == 0) {
 336                 if (state->gensec_state) {
 337                         talloc_free(state->gensec_state);
 338                         state->gensec_state = NULL;
 339                 }
 340         } else if ( (strncmp(buf, "OK", 2) == 0)) {
 341                 /* do nothing */
 342                 data_blob_free(&in);
 343                 return;
 344         } else if ( (strncmp(buf, "TT ", 3) != 0) &&
 345                     (strncmp(buf, "KK ", 3) != 0) &&
 346                     (strncmp(buf, "AF ", 3) != 0) &&
 347                     (strncmp(buf, "NA ", 3) != 0) &&
 348                     (strncmp(buf, "UG", 2) != 0) &&
 349                     (strncmp(buf, "PW ", 3) != 0)) {
 350                 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
 351                 mux_printf(mux_id, "BH\n");
 352                 data_blob_free(&in);
 353                 return;
 354         }
 355
 356         /* setup gensec */
 357         if (!(state->gensec_state)) {
 358                 switch (stdio_helper_mode) {
 359                 case GSS_SPNEGO_CLIENT:
 360                 case NTLMSSP_CLIENT_1:
 361                         /* setup the client side */
 362
 363                         nt_status = gensec_client_start(NULL, &state->gensec_state, NULL);
 364                         if (!NT_STATUS_IS_OK(nt_status)) {
 365                                 exit(1);
 366                         }
 367
 368                         break;
 369                 case GSS_SPNEGO_SERVER:
 370                 case SQUID_2_5_NTLMSSP:
 371                         if (!NT_STATUS_IS_OK(gensec_server_start(NULL, &state->gensec_state, NULL))) {
 372                                 exit(1);
 373                         }
 374                         break;
 375                 default:
 376                         abort();
 377                 }
 378
 379                 creds = cli_credentials_init(state->gensec_state);
 380                 cli_credentials_set_conf(creds);
 381                 if (opt_username) {
 382                         cli_credentials_set_username(creds, opt_username, CRED_SPECIFIED);
 383                 }
 384                 if (opt_domain) {
 385                         cli_credentials_set_domain(creds, opt_domain, CRED_SPECIFIED);
 386                 }
 387                 if (state->set_password) {
 388                         cli_credentials_set_password(creds, state->set_password, CRED_SPECIFIED);
 389                 } else {
 390                         cli_credentials_set_password_callback(creds, get_password);
 391                         creds->priv_data = (void*)mux_id;
 392                 }
 393                 if (opt_workstation) {
 394                         cli_credentials_set_workstation(creds, opt_workstation, CRED_SPECIFIED);
 395                 }
 396
 397                 switch (stdio_helper_mode) {
 398                 case GSS_SPNEGO_SERVER:
 399                 case SQUID_2_5_NTLMSSP:
 400                         cli_credentials_set_machine_account(creds);
 401                         break;
 402                 default:
 403                         break;
 404                 }
 405
 406                 gensec_set_credentials(state->gensec_state, creds);
 407
 408                 switch (stdio_helper_mode) {
 409                 case GSS_SPNEGO_CLIENT:
 410                 case GSS_SPNEGO_SERVER:
 411                         nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_SPNEGO);
 412                         if (!in.length) {
 413                                 first = True;
 414                         }
 415                         break;
 416                 case NTLMSSP_CLIENT_1:
 417                         if (!in.length) {
 418                                 first = True;
 419                         }
 420                 case SQUID_2_5_NTLMSSP:
 421                         nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_NTLMSSP);
 422                         break;
 423                 default:
 424                         abort();
 425                 }
 426
 427                 if (!NT_STATUS_IS_OK(nt_status)) {
 428                         DEBUG(1, ("GENSEC mech failed to start: %s\n", nt_errstr(nt_status)));
 429                         mux_printf(mux_id, "BH\n");
 430                         return;
 431                 }
 432
 433         }
 434
 435         /* update */
 436         mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");
 437
 438         if (strncmp(buf, "PW ", 3) == 0) {
 439                 state->set_password = talloc_strndup(state,
 440                                                      (const char *)in.data,
 441                                                      in.length);
 442
 443                 cli_credentials_set_password(gensec_get_credentials(state->gensec_state),
 444                                              state->set_password,
 445                                              CRED_SPECIFIED);
 446                 mux_printf(mux_id, "OK\n");
 447                 data_blob_free(&in);
 448                 talloc_free(mem_ctx);
 449                 return;
 450         }
 451
 452         if (strncmp(buf, "UG", 2) == 0) {
 453                 int i;
 454                 char *grouplist = NULL;
 455                 struct auth_session_info *session_info;
 456
 457                 if (!NT_STATUS_IS_OK(gensec_session_info(state->gensec_state, &session_info))) {
 458                         DEBUG(1, ("gensec_session_info failed: %s\n", nt_errstr(nt_status)));
 459                         mux_printf(mux_id, "BH %s\n", nt_errstr(nt_status));
 460                         data_blob_free(&in);
 461                         talloc_free(mem_ctx);
 462                         return;
 463                 }
 464
 465                 /* get the string onto the context */
 466                 grouplist = talloc_strdup(mem_ctx, "");
 467
 468                 for (i=0; i<session_info->security_token->num_sids; i++) {
 469                         struct security_token *token = session_info->security_token;
 470                         const char *sidstr = dom_sid_string(session_info,
 471                                                             token->sids[i]);
 472                         grouplist = talloc_asprintf_append(grouplist, "%s,", sidstr);
 473                 }
 474
 475                 mux_printf(mux_id, "GL %s\n", grouplist);
 476                 talloc_free(session_info);
 477                 data_blob_free(&in);
 478                 talloc_free(mem_ctx);
 479                 return;
 480         }
 481
 482         nt_status = gensec_update(state->gensec_state, mem_ctx, in, &out);
 483
 484         /* don't leak 'bad password'/'no such user' info to the network client */
 485         nt_status = auth_nt_status_squash(nt_status);
 486
 487         if (out.length) {
 488                 out_base64 = base64_encode_data_blob(mem_ctx, out);
 489         } else {
 490                 out_base64 = NULL;
 491         }
 492
 493         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 494                 reply_arg = "*";
 495                 if (first) {
 496                         reply_code = "YR";
 497                 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
 498                         reply_code = "KK";
 499                 } else if (state->gensec_state->gensec_role == GENSEC_SERVER) {
 500                         reply_code = "TT";
 501                 } else {
 502                         abort();
 503                 }
 504
 505
 506         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
 507                 reply_code = "BH";
 508                 reply_arg = nt_errstr(nt_status);
 509                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 510         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
 511                 reply_code = "BH";
 512                 reply_arg = nt_errstr(nt_status);
 513                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 514         } else if (!NT_STATUS_IS_OK(nt_status)) {
 515                 reply_code = "NA";
 516                 reply_arg = nt_errstr(nt_status);
 517                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 518         } else if /* OK */ (state->gensec_state->gensec_role == GENSEC_SERVER) {
 519                 struct auth_session_info *session_info;
 520
 521                 nt_status = gensec_session_info(state->gensec_state, &session_info);
 522                 if (!NT_STATUS_IS_OK(nt_status)) {
 523                         reply_code = "BH";
 524                         reply_arg = nt_errstr(nt_status);
 525                         DEBUG(1, ("GENSEC failed to retreive the session info: %s\n", nt_errstr(nt_status)));
 526                 } else {
 527
 528                         reply_code = "AF";
 529                         reply_arg = talloc_asprintf(state->gensec_state,
 530                                                     "%s%s%s", session_info->server_info->domain_name,
 531                                                     lp_winbind_separator(), session_info->server_info->account_name);
 532                         talloc_free(session_info);
 533                 }
 534         } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
 535                 reply_code = "AF";
 536                 reply_arg = out_base64;
 537         } else {
 538                 abort();
 539         }
 540
 541         switch (stdio_helper_mode) {
 542         case GSS_SPNEGO_SERVER:
 543                 mux_printf(mux_id, "%s %s %s\n", reply_code,
 544                           out_base64 ? out_base64 : "*",
 545                           reply_arg ? reply_arg : "*");
 546                 break;
 547         default:
 548                 if (out_base64) {
 549                         mux_printf(mux_id, "%s %s\n", reply_code, out_base64);
 550                 } else if (reply_arg) {
 551                         mux_printf(mux_id, "%s %s\n", reply_code, reply_arg);
 552                 } else {
 553                         mux_printf(mux_id, "%s\n", reply_code);
 554                 }
 555         }
 556
 557         talloc_free(mem_ctx);
 558         return;
 559 }
 560
 561 static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
 562                                          char *buf, int length, void **private,
 563                                          unsigned int mux_id, void **private2)
 564 {
 565         char *request, *parameter;
 566         static DATA_BLOB challenge;
 567         static DATA_BLOB lm_response;
 568         static DATA_BLOB nt_response;
 569         static char *full_username;
 570         static char *username;
 571         static char *domain;
 572         static char *plaintext_password;
 573         static BOOL ntlm_server_1_user_session_key;
 574         static BOOL ntlm_server_1_lm_session_key;
 575
 576         if (strequal(buf, ".")) {
 577                 if (!full_username && !username) {
 578                         mux_printf(mux_id, "Error: No username supplied!\n");
 579                 } else if (plaintext_password) {
 580                         /* handle this request as plaintext */
 581                         if (!full_username) {
 582                                 if (asprintf(&full_username, "%s%c%s", domain, *lp_winbind_separator(), username) == -1) {
 583                                         mux_printf(mux_id, "Error: Out of memory in asprintf!\n.\n");
 584                                         return;
 585                                 }
 586                         }
 587                         if (check_plaintext_auth(full_username, plaintext_password, False)) {
 588                                 mux_printf(mux_id, "Authenticated: Yes\n");
 589                         } else {
 590                                 mux_printf(mux_id, "Authenticated: No\n");
 591                         }
 592                 } else if (!lm_response.data && !nt_response.data) {
 593                         mux_printf(mux_id, "Error: No password supplied!\n");
 594                 } else if (!challenge.data) {
 595                         mux_printf(mux_id, "Error: No lanman-challenge supplied!\n");
 596                 } else {
 597                         char *error_string = NULL;
 598                         DATA_BLOB lm_key;
 599                         DATA_BLOB user_session_key;
 600                         uint32_t flags = 0;
 601
 602                         if (full_username && !username) {
 603                                 fstring fstr_user;
 604                                 fstring fstr_domain;
 605
 606                                 if (!parse_ntlm_auth_domain_user(full_username, fstr_user, fstr_domain)) {
 607                                         /* username might be 'tainted', don't print into our new-line deleimianted stream */
 608                                         mux_printf(mux_id, "Error: Could not parse into domain and username\n");
 609                                 }
 610                                 SAFE_FREE(username);
 611                                 SAFE_FREE(domain);
 612                                 username = smb_xstrdup(fstr_user);
 613                                 domain = smb_xstrdup(fstr_domain);
 614                         }
 615
 616                         if (!domain) {
 617                                 domain = smb_xstrdup(lp_workgroup());
 618                         }
 619
 620                         if (ntlm_server_1_lm_session_key)
 621                                 flags |= NTLM_AUTH_FLAG_LMKEY;
 622
 623                         if (ntlm_server_1_user_session_key)
 624                                 flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY;
 625
 626                         if (!NT_STATUS_IS_OK(
 627                                     local_pw_check_specified(username,
 628                                                               domain,
 629                                                               lp_netbios_name(),
 630                                                               &challenge,
 631                                                               &lm_response,
 632                                                               &nt_response,
 633                                                               flags,
 634                                                               &lm_key,
 635                                                               &user_session_key,
 636                                                               &error_string,
 637                                                               NULL))) {
 638
 639                                 mux_printf(mux_id, "Authenticated: No\n");
 640                                 mux_printf(mux_id, "Authentication-Error: %s\n.\n", error_string);
 641                                 SAFE_FREE(error_string);
 642                         } else {
 643                                 static char zeros[16];
 644                                 char *hex_lm_key;
 645                                 char *hex_user_session_key;
 646
 647                                 mux_printf(mux_id, "Authenticated: Yes\n");
 648
 649                                 if (ntlm_server_1_lm_session_key
 650                                     && lm_key.length
 651                                     && (memcmp(zeros, lm_key.data,
 652                                                                 lm_key.length) != 0)) {
 653                                         hex_encode(lm_key.data,
 654                                                    lm_key.length,
 655                                                    &hex_lm_key);
 656                                         mux_printf(mux_id, "LANMAN-Session-Key: %s\n", hex_lm_key);
 657                                         SAFE_FREE(hex_lm_key);
 658                                 }
 659
 660                                 if (ntlm_server_1_user_session_key
 661                                     && user_session_key.length
 662                                     && (memcmp(zeros, user_session_key.data,
 663                                                user_session_key.length) != 0)) {
 664                                         hex_encode(user_session_key.data,
 665                                                    user_session_key.length,
 666                                                    &hex_user_session_key);
 667                                         mux_printf(mux_id, "User-Session-Key: %s\n", hex_user_session_key);
 668                                         SAFE_FREE(hex_user_session_key);
 669                                 }
 670                         }
 671                 }
 672                 /* clear out the state */
 673                 challenge = data_blob(NULL, 0);
 674                 nt_response = data_blob(NULL, 0);
 675                 lm_response = data_blob(NULL, 0);
 676                 SAFE_FREE(full_username);
 677                 SAFE_FREE(username);
 678                 SAFE_FREE(domain);
 679                 SAFE_FREE(plaintext_password);
 680                 ntlm_server_1_user_session_key = False;
 681                 ntlm_server_1_lm_session_key = False;
 682                 mux_printf(mux_id, ".\n");
 683
 684                 return;
 685         }
 686
 687         request = buf;
 688
 689         /* Indicates a base64 encoded structure */
 690         parameter = strstr(request, ":: ");
 691         if (!parameter) {
 692                 parameter = strstr(request, ": ");
 693
 694                 if (!parameter) {
 695                         DEBUG(0, ("Parameter not found!\n"));
 696                         mux_printf(mux_id, "Error: Parameter not found!\n.\n");
 697                         return;
 698                 }
 699
 700                 parameter[0] ='\0';
 701                 parameter++;
 702                 parameter[0] ='\0';
 703                 parameter++;
 704
 705         } else {
 706                 parameter[0] ='\0';
 707                 parameter++;
 708                 parameter[0] ='\0';
 709                 parameter++;
 710                 parameter[0] ='\0';
 711                 parameter++;
 712
 713                 base64_decode_inplace(parameter);
 714         }
 715
 716         if (strequal(request, "LANMAN-Challenge")) {
 717                 challenge = strhex_to_data_blob(parameter);
 718                 if (challenge.length != 8) {
 719                         mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
 720                                   parameter,
 721                                   (int)challenge.length);
 722                         challenge = data_blob(NULL, 0);
 723                 }
 724         } else if (strequal(request, "NT-Response")) {
 725                 nt_response = strhex_to_data_blob(parameter);
 726                 if (nt_response.length < 24) {
 727                         mux_printf(mux_id, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
 728                                   parameter,
 729                                   (int)nt_response.length);
 730                         nt_response = data_blob(NULL, 0);
 731                 }
 732         } else if (strequal(request, "LANMAN-Response")) {
 733                 lm_response = strhex_to_data_blob(parameter);
 734                 if (lm_response.length != 24) {
 735                         mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
 736                                   parameter,
 737                                   (int)lm_response.length);
 738                         lm_response = data_blob(NULL, 0);
 739                 }
 740         } else if (strequal(request, "Password")) {
 741                 plaintext_password = smb_xstrdup(parameter);
 742         } else if (strequal(request, "NT-Domain")) {
 743                 domain = smb_xstrdup(parameter);
 744         } else if (strequal(request, "Username")) {
 745                 username = smb_xstrdup(parameter);
 746         } else if (strequal(request, "Full-Username")) {
 747                 full_username = smb_xstrdup(parameter);
 748         } else if (strequal(request, "Request-User-Session-Key")) {
 749                 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
 750         } else if (strequal(request, "Request-LanMan-Session-Key")) {
 751                 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
 752         } else {
 753                 mux_printf(mux_id, "Error: Unknown request %s\n.\n", request);
 754         }
 755 }
 756
 757 static void manage_squid_request(enum stdio_helper_mode helper_mode,
 758                                  stdio_helper_function fn, void **private2)
 759 {
 760         char buf[SQUID_BUFFER_SIZE+1];
 761         unsigned int mux_id;
 762         int length;
 763         char *c;
 764         static BOOL err;
 765         struct mux_private {
 766                 unsigned int max_mux;
 767                 void **private_pointers;
 768         };
 769
 770         static struct mux_private *mux_private;
 771         static void *normal_private;
 772         void **private;
 773
 774         /* this is not a typo - x_fgets doesn't work too well under squid */
 775         if (fgets(buf, sizeof(buf)-1, stdin) == NULL) {
 776                 if (ferror(stdin)) {
 777                         DEBUG(1, ("fgets() failed! dying..... errno=%d (%s)\n", ferror(stdin),
 778                                   strerror(ferror(stdin))));
 779
 780                         exit(1);    /* BIIG buffer */
 781                 }
 782                 exit(0);
 783         }
 784
 785         c=memchr(buf,'\n',sizeof(buf)-1);
 786         if (c) {
 787                 *c = '\0';
 788                 length = c-buf;
 789         } else {
 790                 err = 1;
 791                 return;
 792         }
 793         if (err) {
 794                 DEBUG(0, ("Oversized message\n"));
 795                 x_fprintf(x_stdout, "ERR\n");
 796                 err = 0;
 797                 return;
 798         }
 799
 800         DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
 801
 802         if (buf[0] == '\0') {
 803                 DEBUG(0, ("Invalid Request (empty)\n"));
 804                 x_fprintf(x_stdout, "ERR\n");
 805                 return;
 806         }
 807
 808         if (opt_multiplex) {
 809                 if (sscanf(buf, "%u ", &mux_id) != 1) {
 810                         DEBUG(0, ("Invalid Request - no multiplex id\n"));
 811                         x_fprintf(x_stdout, "ERR\n");
 812                         return;
 813                 }
 814                 if (!mux_private) {
 815                         mux_private = talloc(NULL, struct mux_private);
 816                         mux_private->max_mux = 0;
 817                         mux_private->private_pointers = NULL;
 818                 }
 819
 820                 c=strchr(buf,' ');
 821                 if (!c) {
 822                         DEBUG(0, ("Invalid Request - no data after multiplex id\n"));
 823                         x_fprintf(x_stdout, "ERR\n");
 824                         return;
 825                 }
 826                 c++;
 827                 if (mux_id >= mux_private->max_mux) {
 828                         unsigned int prev_max = mux_private->max_mux;
 829                         mux_private->max_mux = mux_id + 1;
 830                         mux_private->private_pointers
 831                                 = talloc_realloc(mux_private,
 832                                                    mux_private->private_pointers,
 833                                                    void *, mux_private->max_mux);
 834                         memset(&mux_private->private_pointers[prev_max], '\0',
 835                                (sizeof(*mux_private->private_pointers) * (mux_private->max_mux - prev_max)));
 836                 };
 837
 838                 private = &mux_private->private_pointers[mux_id];
 839         } else {
 840                 c = buf;
 841                 private = &normal_private;
 842         }
 843
 844         fn(helper_mode, c, length, private, mux_id, private2);
 845 }
 846
 847 static void squid_stream(enum stdio_helper_mode stdio_mode,
 848                          stdio_helper_function fn) {
 849         /* initialize FDescs */
 850         x_setbuf(x_stdout, NULL);
 851         x_setbuf(x_stderr, NULL);
 852         while(1) {
 853                 manage_squid_request(stdio_mode, fn, NULL);
 854         }
 855 }
 856
 857
 858 /* Main program */
 859
 860 enum {
 861         OPT_USERNAME = 1000,
 862         OPT_DOMAIN,
 863         OPT_WORKSTATION,
 864         OPT_CHALLENGE,
 865         OPT_RESPONSE,
 866         OPT_LM,
 867         OPT_NT,
 868         OPT_PASSWORD,
 869         OPT_LM_KEY,
 870         OPT_USER_SESSION_KEY,
 871         OPT_DIAGNOSTICS,
 872         OPT_REQUIRE_MEMBERSHIP,
 873         OPT_MULTIPLEX,
 874 };
 875
 876 int main(int argc, const char **argv)
 877 {
 878         static const char *helper_protocol;
 879         int opt;
 880
 881         poptContext pc;
 882
 883         /* NOTE: DO NOT change this interface without considering the implications!
 884            This is an external interface, which other programs will use to interact
 885            with this helper.
 886         */
 887
 888         /* We do not use single-letter command abbreviations, because they harm future
 889            interface stability. */
 890
 891         struct poptOption long_options[] = {
 892                 POPT_AUTOHELP
 893                 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
 894                 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
 895                 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
 896                 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"},
 897                 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
 898                 { "multiplex", 0, POPT_ARG_NONE, &opt_multiplex, OPT_MULTIPLEX, "Multiplex Mode"},
 899                 POPT_COMMON_SAMBA
 900                 POPT_COMMON_VERSION
 901                 POPT_TABLEEND
 902         };
 903
 904         /* Samba client initialisation */
 905
 906         setup_logging(NULL, DEBUG_STDERR);
 907
 908         /* Parse options */
 909
 910         pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
 911
 912         /* Parse command line options */
 913
 914         if (argc == 1) {
 915                 poptPrintHelp(pc, stderr, 0);
 916                 return 1;
 917         }
 918
 919         pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
 920                             POPT_CONTEXT_KEEP_FIRST);
 921
 922         while((opt = poptGetNextOpt(pc)) != -1) {
 923                 if (opt < -1) {
 924                         break;
 925                 }
 926         }
 927         if (opt < -1) {
 928                 fprintf(stderr, "%s: %s\n",
 929                         poptBadOption(pc, POPT_BADOPTION_NOALIAS),
 930                         poptStrerror(opt));
 931                 return 1;
 932         }
 933
 934         ntlm_auth_init_subsystems;
 935
 936
 937         if (opt_domain == NULL) {
 938                 opt_domain = lp_workgroup();
 939         }
 940
 941         if (helper_protocol) {
 942                 int i;
 943                 for (i=0; i<NUM_HELPER_MODES; i++) {
 944                         if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
 945                                 squid_stream(stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
 946                                 exit(0);
 947                         }
 948                 }
 949                 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
 950
 951                 for (i=0; i<NUM_HELPER_MODES; i++) {
 952                         x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
 953                 }
 954
 955                 exit(1);
 956         }
 957
 958         if (!opt_username) {
 959                 x_fprintf(x_stderr, "username must be specified!\n\n");
 960                 poptPrintHelp(pc, stderr, 0);
 961                 exit(1);
 962         }
 963
 964         if (opt_workstation == NULL) {
 965                 opt_workstation = lp_netbios_name();
 966         }
 967
 968         if (!opt_password) {
 969                 opt_password = getpass("password: ");
 970         }
 971
 972         {
 973                 char *user;
 974
 975                 asprintf(&user, "%s%c%s", opt_domain, *lp_winbind_separator(), opt_username);
 976                 if (!check_plaintext_auth(user, opt_password, True)) {
 977                         return 1;
 978                 }
 979         }
 980
 981         /* Exit code */
 982
 983         poptFreeContext(pc);
 984         return 0;
 985 }