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/filesys.h"
  27 #include "lib/cmdline/popt_common.h"
  28 #include "auth/auth.h"
  29 #include "auth/auth_sam.h"
  30 #include "pstring.h"
  31 #include "libcli/auth/libcli_auth.h"
  32 #include "libcli/security/security.h"
  33 #include "lib/ldb/include/ldb.h"
  34 #include "lib/events/events.h"
  35 #include "lib/messaging/messaging.h"
  36 #include "lib/messaging/irpc.h"
  37 #include "auth/ntlmssp/ntlmssp.h"
  38
  39 #define SQUID_BUFFER_SIZE 2010
  40
  41 enum stdio_helper_mode {
  42         SQUID_2_4_BASIC,
  43         SQUID_2_5_BASIC,
  44         SQUID_2_5_NTLMSSP,
  45         NTLMSSP_CLIENT_1,
  46         GSS_SPNEGO_CLIENT,
  47         GSS_SPNEGO_SERVER,
  48         NTLM_SERVER_1,
  49         NUM_HELPER_MODES
  50 };
  51
  52 #define NTLM_AUTH_FLAG_USER_SESSION_KEY     0x0004
  53 #define NTLM_AUTH_FLAG_LMKEY                0x0008
  54
  55
  56 typedef void (*stdio_helper_function)(enum stdio_helper_mode stdio_helper_mode,
  57                                       char *buf, int length, void **private,
  58                                       unsigned int mux_id, void **private2);
  59
  60 static void manage_squid_basic_request (enum stdio_helper_mode stdio_helper_mode,
  61                                         char *buf, int length, void **private,
  62                                         unsigned int mux_id, void **private2);
  63
  64 static void manage_gensec_request (enum stdio_helper_mode stdio_helper_mode,
  65                                    char *buf, int length, void **private,
  66                                    unsigned int mux_id, void **private2);
  67
  68 static void manage_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode,
  69                                           char *buf, int length, void **private,
  70                                           unsigned int mux_id, void **private2);
  71
  72 static void manage_squid_request(enum stdio_helper_mode helper_mode,
  73                                  stdio_helper_function fn, void **private2);
  74
  75 static const struct {
  76         enum stdio_helper_mode mode;
  77         const char *name;
  78         stdio_helper_function fn;
  79 } stdio_helper_protocols[] = {
  80         { SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
  81         { SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
  82         { SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request},
  83         { GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request},
  84         { GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request},
  85         { NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request},
  86         { NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
  87         { NUM_HELPER_MODES, NULL, NULL}
  88 };
  89
  90 extern int winbindd_fd;
  91
  92 static const char *opt_username;
  93 static const char *opt_domain;
  94 static const char *opt_workstation;
  95 static const char *opt_password;
  96 static int opt_multiplex;
  97 static int use_cached_creds;
  98
  99
 100 static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
 101
 102 static void mux_printf(unsigned int mux_id, const char *format, ...)
 103 {
 104         va_list ap;
 105
 106         if (opt_multiplex) {
 107                 x_fprintf(x_stdout, "%d ", mux_id);
 108         }
 109
 110         va_start(ap, format);
 111         x_vfprintf(x_stdout, format, ap);
 112         va_end(ap);
 113 }
 114
 115
 116
 117 /* Copy of parse_domain_user from winbindd_util.c.  Parse a string of the
 118    form DOMAIN/user into a domain and a user */
 119
 120 static BOOL parse_ntlm_auth_domain_user(const char *domuser, fstring domain,
 121                                         fstring user)
 122 {
 123
 124         char *p = strchr(domuser,*lp_winbind_separator());
 125
 126         if (!p) {
 127                 return False;
 128         }
 129
 130         fstrcpy(user, p+1);
 131         fstrcpy(domain, domuser);
 132         domain[PTR_DIFF(p, domuser)] = 0;
 133
 134         return True;
 135 }
 136
 137 /**
 138  * Decode a base64 string into a DATA_BLOB - simple and slow algorithm
 139  **/
 140 static DATA_BLOB base64_decode_data_blob(TALLOC_CTX *mem_ctx, const char *s)
 141 {
 142         DATA_BLOB ret = data_blob_talloc(mem_ctx, s, strlen(s)+1);
 143         ret.length = ldb_base64_decode((char *)ret.data);
 144         return ret;
 145 }
 146
 147 /**
 148  * Encode a base64 string into a talloc()ed string caller to free.
 149  **/
 150 static char *base64_encode_data_blob(TALLOC_CTX *mem_ctx, DATA_BLOB data)
 151 {
 152         return ldb_base64_encode(mem_ctx, (const char *)data.data, data.length);
 153 }
 154
 155 /**
 156  * Decode a base64 string in-place - wrapper for the above
 157  **/
 158 static void base64_decode_inplace(char *s)
 159 {
 160         ldb_base64_decode(s);
 161 }
 162
 163
 164
 165 /* Authenticate a user with a plaintext password */
 166
 167 static BOOL check_plaintext_auth(const char *user, const char *pass,
 168                                  BOOL stdout_diagnostics)
 169 {
 170         return (strcmp(pass, opt_password) == 0);
 171 }
 172
 173 /* authenticate a user with an encrypted username/password */
 174
 175 static NTSTATUS local_pw_check_specified(const char *username,
 176                                          const char *domain,
 177                                          const char *workstation,
 178                                          const DATA_BLOB *challenge,
 179                                          const DATA_BLOB *lm_response,
 180                                          const DATA_BLOB *nt_response,
 181                                          uint32_t flags,
 182                                          DATA_BLOB *lm_session_key,
 183                                          DATA_BLOB *user_session_key,
 184                                          char **error_string,
 185                                          char **unix_name)
 186 {
 187         NTSTATUS nt_status;
 188         struct samr_Password lm_pw, nt_pw;
 189         struct samr_Password *lm_pwd, *nt_pwd;
 190         TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
 191         if (!mem_ctx) {
 192                 nt_status = NT_STATUS_NO_MEMORY;
 193         } else {
 194
 195                 E_md4hash(opt_password, nt_pw.hash);
 196                 if (E_deshash(opt_password, lm_pw.hash)) {
 197                         lm_pwd = &lm_pw;
 198                 } else {
 199                         lm_pwd = NULL;
 200                 }
 201                 nt_pwd = &nt_pw;
 202
 203
 204                 nt_status = ntlm_password_check(mem_ctx,
 205                                                 MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT |
 206                                                 MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
 207                                                 challenge,
 208                                                 lm_response,
 209                                                 nt_response,
 210                                                 username,
 211                                                 username,
 212                                                 domain,
 213                                                 lm_pwd, nt_pwd, user_session_key, lm_session_key);
 214
 215                 if (NT_STATUS_IS_OK(nt_status)) {
 216                         if (unix_name) {
 217                                 asprintf(unix_name,
 218                                          "%s%c%s", domain,
 219                                          *lp_winbind_separator(),
 220                                          username);
 221                         }
 222                 } else {
 223                         DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
 224                                   domain, username, workstation,
 225                                   nt_errstr(nt_status)));
 226                 }
 227                 talloc_free(mem_ctx);
 228         }
 229         if (error_string) {
 230                 *error_string = strdup(nt_errstr(nt_status));
 231         }
 232         return nt_status;
 233
 234
 235 }
 236
 237 static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode,
 238                                        char *buf, int length, void **private,
 239                                        unsigned int mux_id, void **private2)
 240 {
 241         char *user, *pass;
 242         user=buf;
 243
 244         pass=memchr(buf,' ',length);
 245         if (!pass) {
 246                 DEBUG(2, ("Password not found. Denying access\n"));
 247                 mux_printf(mux_id, "ERR\n");
 248                 return;
 249         }
 250         *pass='\0';
 251         pass++;
 252
 253         if (stdio_helper_mode == SQUID_2_5_BASIC) {
 254                 rfc1738_unescape(user);
 255                 rfc1738_unescape(pass);
 256         }
 257
 258         if (check_plaintext_auth(user, pass, False)) {
 259                 mux_printf(mux_id, "OK\n");
 260         } else {
 261                 mux_printf(mux_id, "ERR\n");
 262         }
 263 }
 264
 265 /* This is a bit hairy, but the basic idea is to do a password callback
 266    to the calling application.  The callback comes from within gensec */
 267
 268 static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode,
 269                                          char *buf, int length, void **private,
 270                                          unsigned int mux_id, void **password)
 271 {
 272         DATA_BLOB in;
 273         if (strlen(buf) < 2) {
 274                 DEBUG(1, ("query [%s] invalid", buf));
 275                 mux_printf(mux_id, "BH\n");
 276                 return;
 277         }
 278
 279         if (strlen(buf) > 3) {
 280                 in = base64_decode_data_blob(NULL, buf + 3);
 281         } else {
 282                 in = data_blob(NULL, 0);
 283         }
 284
 285         if (strncmp(buf, "PW ", 3) == 0) {
 286
 287                 *password = talloc_strndup(*private /* hopefully the right gensec context, useful to use for talloc */,
 288                                            (const char *)in.data, in.length);
 289
 290                 if (*password == NULL) {
 291                         DEBUG(1, ("Out of memory\n"));
 292                         mux_printf(mux_id, "BH\n");
 293                         data_blob_free(&in);
 294                         return;
 295                 }
 296
 297                 mux_printf(mux_id, "OK\n");
 298                 data_blob_free(&in);
 299                 return;
 300         }
 301         DEBUG(1, ("Asked for (and expected) a password\n"));
 302         mux_printf(mux_id, "BH\n");
 303         data_blob_free(&in);
 304 }
 305
 306 /**
 307  * Callback for password credentails.  This is not async, and when
 308  * GENSEC and the credentails code is made async, it will look rather
 309  * different.
 310  */
 311
 312 static const char *get_password(struct cli_credentials *credentials)
 313 {
 314         char *password = NULL;
 315
 316         /* Ask for a password */
 317         mux_printf((unsigned int)credentials->priv_data, "PW\n");
 318         credentials->priv_data = NULL;
 319
 320         manage_squid_request(NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, (void **)&password);
 321         return password;
 322 }
 323
 324 static void gensec_want_feature_list(struct gensec_security *state, char* feature_list)
 325 {
 326         if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list, True)) {
 327                 DEBUG(10, ("want GENSEC_FEATURE_SESSION_KEY\n"));
 328                 gensec_want_feature(state, GENSEC_FEATURE_SESSION_KEY);
 329         }
 330         if (in_list("NTLMSSP_FEATURE_SIGN", feature_list, True)) {
 331                 DEBUG(10, ("want GENSEC_FEATURE_SIGN\n"));
 332                 gensec_want_feature(state, GENSEC_FEATURE_SIGN);
 333         }
 334         if (in_list("NTLMSSP_FEATURE_SEAL", feature_list, True)) {
 335                 DEBUG(10, ("want GENSEC_FEATURE_SEAL\n"));
 336                 gensec_want_feature(state, GENSEC_FEATURE_SEAL);
 337         }
 338 }
 339
 340 static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode,
 341                                   char *buf, int length, void **private,
 342                                   unsigned int mux_id, void **private2)
 343 {
 344         DATA_BLOB in;
 345         DATA_BLOB out = data_blob(NULL, 0);
 346         char *out_base64 = NULL;
 347         const char *reply_arg = NULL;
 348         struct gensec_ntlm_state {
 349                 struct gensec_security *gensec_state;
 350                 const char *set_password;
 351         };
 352         struct gensec_ntlm_state *state;
 353         struct event_context *ev;
 354         struct messaging_context *msg;
 355
 356         NTSTATUS nt_status;
 357         BOOL first = False;
 358         const char *reply_code;
 359         struct cli_credentials *creds;
 360
 361         static char *want_feature_list = NULL;
 362         static DATA_BLOB session_key;
 363
 364         TALLOC_CTX *mem_ctx;
 365
 366         if (*private) {
 367                 state = *private;
 368         } else {
 369                 state = talloc_zero(NULL, struct gensec_ntlm_state);
 370                 if (!state) {
 371                         mux_printf(mux_id, "BH No Memory\n");
 372                         exit(1);
 373                 }
 374                 *private = state;
 375                 if (opt_password) {
 376                         state->set_password = opt_password;
 377                 }
 378         }
 379
 380         if (strlen(buf) < 2) {
 381                 DEBUG(1, ("query [%s] invalid", buf));
 382                 mux_printf(mux_id, "BH\n");
 383                 return;
 384         }
 385
 386         if (strlen(buf) > 3) {
 387                 if(strncmp(buf, "SF ", 3) == 0) {
 388                         DEBUG(10, ("Setting flags to negotiate\n"));
 389                         talloc_free(want_feature_list);
 390                         want_feature_list = talloc_strndup(state, buf+3, strlen(buf)-3);
 391                         mux_printf(mux_id, "OK\n");
 392                         return;
 393                 }
 394                 in = base64_decode_data_blob(NULL, buf + 3);
 395         } else {
 396                 in = data_blob(NULL, 0);
 397         }
 398
 399         if (strncmp(buf, "YR", 2) == 0) {
 400                 if (state->gensec_state) {
 401                         talloc_free(state->gensec_state);
 402                         state->gensec_state = NULL;
 403                 }
 404         } else if ( (strncmp(buf, "OK", 2) == 0)) {
 405                 /* do nothing */
 406                 data_blob_free(&in);
 407                 return;
 408         } else if ( (strncmp(buf, "TT ", 3) != 0) &&
 409                     (strncmp(buf, "KK ", 3) != 0) &&
 410                     (strncmp(buf, "AF ", 3) != 0) &&
 411                     (strncmp(buf, "NA ", 3) != 0) &&
 412                     (strncmp(buf, "UG", 2) != 0) &&
 413                     (strncmp(buf, "PW ", 3) != 0) &&
 414                     (strncmp(buf, "GK", 2) != 0) &&
 415                     (strncmp(buf, "GF", 2) != 0)) {
 416                 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
 417                 mux_printf(mux_id, "BH\n");
 418                 data_blob_free(&in);
 419                 return;
 420         }
 421
 422         /* setup gensec */
 423         if (!(state->gensec_state)) {
 424                 switch (stdio_helper_mode) {
 425                 case GSS_SPNEGO_CLIENT:
 426                 case NTLMSSP_CLIENT_1:
 427                         /* setup the client side */
 428
 429                         nt_status = gensec_client_start(NULL, &state->gensec_state, NULL);
 430                         if (!NT_STATUS_IS_OK(nt_status)) {
 431                                 exit(1);
 432                         }
 433
 434                         break;
 435                 case GSS_SPNEGO_SERVER:
 436                 case SQUID_2_5_NTLMSSP:
 437                         ev = event_context_init(state);
 438                         if (!ev) {
 439                                 exit(1);
 440                         }
 441                         msg = messaging_client_init(state, ev);
 442                         if (!msg) {
 443                                 exit(1);
 444                         }
 445                         if (!NT_STATUS_IS_OK(gensec_server_start(state, ev, msg, &state->gensec_state))) {
 446                                 exit(1);
 447                         }
 448                         break;
 449                 default:
 450                         abort();
 451                 }
 452
 453                 creds = cli_credentials_init(state->gensec_state);
 454                 cli_credentials_set_conf(creds);
 455                 if (opt_username) {
 456                         cli_credentials_set_username(creds, opt_username, CRED_SPECIFIED);
 457                 }
 458                 if (opt_domain) {
 459                         cli_credentials_set_domain(creds, opt_domain, CRED_SPECIFIED);
 460                 }
 461                 if (state->set_password) {
 462                         cli_credentials_set_password(creds, state->set_password, CRED_SPECIFIED);
 463                 } else {
 464                         cli_credentials_set_password_callback(creds, get_password);
 465                         creds->priv_data = (void*)mux_id;
 466                 }
 467                 if (opt_workstation) {
 468                         cli_credentials_set_workstation(creds, opt_workstation, CRED_SPECIFIED);
 469                 }
 470
 471                 switch (stdio_helper_mode) {
 472                 case GSS_SPNEGO_SERVER:
 473                 case SQUID_2_5_NTLMSSP:
 474                         cli_credentials_set_machine_account(creds);
 475                         break;
 476                 default:
 477                         break;
 478                 }
 479
 480                 gensec_set_credentials(state->gensec_state, creds);
 481                 gensec_want_feature_list(state->gensec_state, want_feature_list);
 482
 483                 switch (stdio_helper_mode) {
 484                 case GSS_SPNEGO_CLIENT:
 485                 case GSS_SPNEGO_SERVER:
 486                         nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_SPNEGO);
 487                         if (!in.length) {
 488                                 first = True;
 489                         }
 490                         break;
 491                 case NTLMSSP_CLIENT_1:
 492                         if (!in.length) {
 493                                 first = True;
 494                         }
 495                         /* fall through */
 496                 case SQUID_2_5_NTLMSSP:
 497                         nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_NTLMSSP);
 498                         break;
 499                 default:
 500                         abort();
 501                 }
 502
 503                 if (!NT_STATUS_IS_OK(nt_status)) {
 504                         DEBUG(1, ("GENSEC mech failed to start: %s\n", nt_errstr(nt_status)));
 505                         mux_printf(mux_id, "BH\n");
 506                         return;
 507                 }
 508
 509         }
 510
 511         /* update */
 512         mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");
 513
 514         if (strncmp(buf, "PW ", 3) == 0) {
 515                 state->set_password = talloc_strndup(state,
 516                                                      (const char *)in.data,
 517                                                      in.length);
 518
 519                 cli_credentials_set_password(gensec_get_credentials(state->gensec_state),
 520                                              state->set_password,
 521                                              CRED_SPECIFIED);
 522                 mux_printf(mux_id, "OK\n");
 523                 data_blob_free(&in);
 524                 talloc_free(mem_ctx);
 525                 return;
 526         }
 527
 528         if (strncmp(buf, "UG", 2) == 0) {
 529                 int i;
 530                 char *grouplist = NULL;
 531                 struct auth_session_info *session_info;
 532
 533                 nt_status = gensec_session_info(state->gensec_state, &session_info);
 534                 if (!NT_STATUS_IS_OK(nt_status)) {
 535                         DEBUG(1, ("gensec_session_info failed: %s\n", nt_errstr(nt_status)));
 536                         mux_printf(mux_id, "BH %s\n", nt_errstr(nt_status));
 537                         data_blob_free(&in);
 538                         talloc_free(mem_ctx);
 539                         return;
 540                 }
 541
 542                 /* get the string onto the context */
 543                 grouplist = talloc_strdup(mem_ctx, "");
 544
 545                 for (i=0; i<session_info->security_token->num_sids; i++) {
 546                         struct security_token *token = session_info->security_token;
 547                         const char *sidstr = dom_sid_string(session_info,
 548                                                             token->sids[i]);
 549                         grouplist = talloc_asprintf_append(grouplist, "%s,", sidstr);
 550                 }
 551
 552                 mux_printf(mux_id, "GL %s\n", grouplist);
 553                 talloc_free(session_info);
 554                 data_blob_free(&in);
 555                 talloc_free(mem_ctx);
 556                 return;
 557         }
 558
 559         if (strncmp(buf, "GK", 2) == 0) {
 560                 char *base64_key;
 561                 DEBUG(10, ("Requested session key\n"));
 562                 nt_status = gensec_session_key(state->gensec_state, &session_key);
 563                 if(!NT_STATUS_IS_OK(nt_status)) {
 564                         DEBUG(1, ("gensec_session_key failed: %s\n", nt_errstr(nt_status)));
 565                         mux_printf(mux_id, "BH No session key\n");
 566                         talloc_free(mem_ctx);
 567                         return;
 568                 } else {
 569                         base64_key = base64_encode_data_blob(state, session_key);
 570                         mux_printf(mux_id, "GK %s\n", base64_key);
 571                         talloc_free(base64_key);
 572                 }
 573                 talloc_free(mem_ctx);
 574                 return;
 575         }
 576
 577         if (strncmp(buf, "GF", 2) == 0) {
 578                 struct gensec_ntlmssp_state *gensec_ntlmssp_state;
 579                 uint32_t neg_flags;
 580
 581                 gensec_ntlmssp_state = talloc_get_type(state->gensec_state->private_data,
 582                                 struct gensec_ntlmssp_state);
 583                 neg_flags = gensec_ntlmssp_state->neg_flags;
 584
 585                 DEBUG(10, ("Requested negotiated feature flags\n"));
 586                 mux_printf(mux_id, "GF 0x%08x\n", neg_flags);
 587                 return;
 588         }
 589
 590         nt_status = gensec_update(state->gensec_state, mem_ctx, in, &out);
 591
 592         /* don't leak 'bad password'/'no such user' info to the network client */
 593         nt_status = auth_nt_status_squash(nt_status);
 594
 595         if (out.length) {
 596                 out_base64 = base64_encode_data_blob(mem_ctx, out);
 597         } else {
 598                 out_base64 = NULL;
 599         }
 600
 601         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 602                 reply_arg = "*";
 603                 if (first) {
 604                         reply_code = "YR";
 605                 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
 606                         reply_code = "KK";
 607                 } else if (state->gensec_state->gensec_role == GENSEC_SERVER) {
 608                         reply_code = "TT";
 609                 } else {
 610                         abort();
 611                 }
 612
 613
 614         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
 615                 reply_code = "BH";
 616                 reply_arg = nt_errstr(nt_status);
 617                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 618         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
 619                 reply_code = "BH";
 620                 reply_arg = nt_errstr(nt_status);
 621                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 622         } else if (!NT_STATUS_IS_OK(nt_status)) {
 623                 reply_code = "NA";
 624                 reply_arg = nt_errstr(nt_status);
 625                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 626         } else if /* OK */ (state->gensec_state->gensec_role == GENSEC_SERVER) {
 627                 struct auth_session_info *session_info;
 628
 629                 nt_status = gensec_session_info(state->gensec_state, &session_info);
 630                 if (!NT_STATUS_IS_OK(nt_status)) {
 631                         reply_code = "BH";
 632                         reply_arg = nt_errstr(nt_status);
 633                         DEBUG(1, ("GENSEC failed to retreive the session info: %s\n", nt_errstr(nt_status)));
 634                 } else {
 635
 636                         reply_code = "AF";
 637                         reply_arg = talloc_asprintf(state->gensec_state,
 638                                                     "%s%s%s", session_info->server_info->domain_name,
 639                                                     lp_winbind_separator(), session_info->server_info->account_name);
 640                         talloc_free(session_info);
 641                 }
 642         } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
 643                 reply_code = "AF";
 644                 reply_arg = out_base64;
 645         } else {
 646                 abort();
 647         }
 648
 649         switch (stdio_helper_mode) {
 650         case GSS_SPNEGO_SERVER:
 651                 mux_printf(mux_id, "%s %s %s\n", reply_code,
 652                           out_base64 ? out_base64 : "*",
 653                           reply_arg ? reply_arg : "*");
 654                 break;
 655         default:
 656                 if (out_base64) {
 657                         mux_printf(mux_id, "%s %s\n", reply_code, out_base64);
 658                 } else if (reply_arg) {
 659                         mux_printf(mux_id, "%s %s\n", reply_code, reply_arg);
 660                 } else {
 661                         mux_printf(mux_id, "%s\n", reply_code);
 662                 }
 663         }
 664
 665         talloc_free(mem_ctx);
 666         return;
 667 }
 668
 669 static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
 670                                          char *buf, int length, void **private,
 671                                          unsigned int mux_id, void **private2)
 672 {
 673         char *request, *parameter;
 674         static DATA_BLOB challenge;
 675         static DATA_BLOB lm_response;
 676         static DATA_BLOB nt_response;
 677         static char *full_username;
 678         static char *username;
 679         static char *domain;
 680         static char *plaintext_password;
 681         static BOOL ntlm_server_1_user_session_key;
 682         static BOOL ntlm_server_1_lm_session_key;
 683
 684         if (strequal(buf, ".")) {
 685                 if (!full_username && !username) {
 686                         mux_printf(mux_id, "Error: No username supplied!\n");
 687                 } else if (plaintext_password) {
 688                         /* handle this request as plaintext */
 689                         if (!full_username) {
 690                                 if (asprintf(&full_username, "%s%c%s", domain, *lp_winbind_separator(), username) == -1) {
 691                                         mux_printf(mux_id, "Error: Out of memory in asprintf!\n.\n");
 692                                         return;
 693                                 }
 694                         }
 695                         if (check_plaintext_auth(full_username, plaintext_password, False)) {
 696                                 mux_printf(mux_id, "Authenticated: Yes\n");
 697                         } else {
 698                                 mux_printf(mux_id, "Authenticated: No\n");
 699                         }
 700                 } else if (!lm_response.data && !nt_response.data) {
 701                         mux_printf(mux_id, "Error: No password supplied!\n");
 702                 } else if (!challenge.data) {
 703                         mux_printf(mux_id, "Error: No lanman-challenge supplied!\n");
 704                 } else {
 705                         char *error_string = NULL;
 706                         DATA_BLOB lm_key;
 707                         DATA_BLOB user_session_key;
 708                         uint32_t flags = 0;
 709
 710                         if (full_username && !username) {
 711                                 fstring fstr_user;
 712                                 fstring fstr_domain;
 713
 714                                 if (!parse_ntlm_auth_domain_user(full_username, fstr_user, fstr_domain)) {
 715                                         /* username might be 'tainted', don't print into our new-line deleimianted stream */
 716                                         mux_printf(mux_id, "Error: Could not parse into domain and username\n");
 717                                 }
 718                                 SAFE_FREE(username);
 719                                 SAFE_FREE(domain);
 720                                 username = smb_xstrdup(fstr_user);
 721                                 domain = smb_xstrdup(fstr_domain);
 722                         }
 723
 724                         if (!domain) {
 725                                 domain = smb_xstrdup(lp_workgroup());
 726                         }
 727
 728                         if (ntlm_server_1_lm_session_key)
 729                                 flags |= NTLM_AUTH_FLAG_LMKEY;
 730
 731                         if (ntlm_server_1_user_session_key)
 732                                 flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY;
 733
 734                         if (!NT_STATUS_IS_OK(
 735                                     local_pw_check_specified(username,
 736                                                               domain,
 737                                                               lp_netbios_name(),
 738                                                               &challenge,
 739                                                               &lm_response,
 740                                                               &nt_response,
 741                                                               flags,
 742                                                               &lm_key,
 743                                                               &user_session_key,
 744                                                               &error_string,
 745                                                               NULL))) {
 746
 747                                 mux_printf(mux_id, "Authenticated: No\n");
 748                                 mux_printf(mux_id, "Authentication-Error: %s\n.\n", error_string);
 749                                 SAFE_FREE(error_string);
 750                         } else {
 751                                 static char zeros[16];
 752                                 char *hex_lm_key;
 753                                 char *hex_user_session_key;
 754
 755                                 mux_printf(mux_id, "Authenticated: Yes\n");
 756
 757                                 if (ntlm_server_1_lm_session_key
 758                                     && lm_key.length
 759                                     && (memcmp(zeros, lm_key.data,
 760                                                                 lm_key.length) != 0)) {
 761                                         hex_encode(lm_key.data,
 762                                                    lm_key.length,
 763                                                    &hex_lm_key);
 764                                         mux_printf(mux_id, "LANMAN-Session-Key: %s\n", hex_lm_key);
 765                                         SAFE_FREE(hex_lm_key);
 766                                 }
 767
 768                                 if (ntlm_server_1_user_session_key
 769                                     && user_session_key.length
 770                                     && (memcmp(zeros, user_session_key.data,
 771                                                user_session_key.length) != 0)) {
 772                                         hex_encode(user_session_key.data,
 773                                                    user_session_key.length,
 774                                                    &hex_user_session_key);
 775                                         mux_printf(mux_id, "User-Session-Key: %s\n", hex_user_session_key);
 776                                         SAFE_FREE(hex_user_session_key);
 777                                 }
 778                         }
 779                 }
 780                 /* clear out the state */
 781                 challenge = data_blob(NULL, 0);
 782                 nt_response = data_blob(NULL, 0);
 783                 lm_response = data_blob(NULL, 0);
 784                 SAFE_FREE(full_username);
 785                 SAFE_FREE(username);
 786                 SAFE_FREE(domain);
 787                 SAFE_FREE(plaintext_password);
 788                 ntlm_server_1_user_session_key = False;
 789                 ntlm_server_1_lm_session_key = False;
 790                 mux_printf(mux_id, ".\n");
 791
 792                 return;
 793         }
 794
 795         request = buf;
 796
 797         /* Indicates a base64 encoded structure */
 798         parameter = strstr(request, ":: ");
 799         if (!parameter) {
 800                 parameter = strstr(request, ": ");
 801
 802                 if (!parameter) {
 803                         DEBUG(0, ("Parameter not found!\n"));
 804                         mux_printf(mux_id, "Error: Parameter not found!\n.\n");
 805                         return;
 806                 }
 807
 808                 parameter[0] ='\0';
 809                 parameter++;
 810                 parameter[0] ='\0';
 811                 parameter++;
 812
 813         } else {
 814                 parameter[0] ='\0';
 815                 parameter++;
 816                 parameter[0] ='\0';
 817                 parameter++;
 818                 parameter[0] ='\0';
 819                 parameter++;
 820
 821                 base64_decode_inplace(parameter);
 822         }
 823
 824         if (strequal(request, "LANMAN-Challenge")) {
 825                 challenge = strhex_to_data_blob(parameter);
 826                 if (challenge.length != 8) {
 827                         mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
 828                                   parameter,
 829                                   (int)challenge.length);
 830                         challenge = data_blob(NULL, 0);
 831                 }
 832         } else if (strequal(request, "NT-Response")) {
 833                 nt_response = strhex_to_data_blob(parameter);
 834                 if (nt_response.length < 24) {
 835                         mux_printf(mux_id, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
 836                                   parameter,
 837                                   (int)nt_response.length);
 838                         nt_response = data_blob(NULL, 0);
 839                 }
 840         } else if (strequal(request, "LANMAN-Response")) {
 841                 lm_response = strhex_to_data_blob(parameter);
 842                 if (lm_response.length != 24) {
 843                         mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
 844                                   parameter,
 845                                   (int)lm_response.length);
 846                         lm_response = data_blob(NULL, 0);
 847                 }
 848         } else if (strequal(request, "Password")) {
 849                 plaintext_password = smb_xstrdup(parameter);
 850         } else if (strequal(request, "NT-Domain")) {
 851                 domain = smb_xstrdup(parameter);
 852         } else if (strequal(request, "Username")) {
 853                 username = smb_xstrdup(parameter);
 854         } else if (strequal(request, "Full-Username")) {
 855                 full_username = smb_xstrdup(parameter);
 856         } else if (strequal(request, "Request-User-Session-Key")) {
 857                 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
 858         } else if (strequal(request, "Request-LanMan-Session-Key")) {
 859                 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
 860         } else {
 861                 mux_printf(mux_id, "Error: Unknown request %s\n.\n", request);
 862         }
 863 }
 864
 865 static void manage_squid_request(enum stdio_helper_mode helper_mode,
 866                                  stdio_helper_function fn, void **private2)
 867 {
 868         char buf[SQUID_BUFFER_SIZE+1];
 869         unsigned int mux_id = 0;
 870         int length;
 871         char *c;
 872         static BOOL err;
 873         struct mux_private {
 874                 unsigned int max_mux;
 875                 void **private_pointers;
 876         };
 877
 878         static struct mux_private *mux_private;
 879         static void *normal_private;
 880         void **private;
 881
 882         /* this is not a typo - x_fgets doesn't work too well under squid */
 883         if (fgets(buf, sizeof(buf)-1, stdin) == NULL) {
 884                 if (ferror(stdin)) {
 885                         DEBUG(1, ("fgets() failed! dying..... errno=%d (%s)\n", ferror(stdin),
 886                                   strerror(ferror(stdin))));
 887
 888                         exit(1);    /* BIIG buffer */
 889                 }
 890                 exit(0);
 891         }
 892
 893         c=memchr(buf,'\n',sizeof(buf)-1);
 894         if (c) {
 895                 *c = '\0';
 896                 length = c-buf;
 897         } else {
 898                 err = 1;
 899                 return;
 900         }
 901         if (err) {
 902                 DEBUG(0, ("Oversized message\n"));
 903                 x_fprintf(x_stdout, "ERR\n");
 904                 err = 0;
 905                 return;
 906         }
 907
 908         DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
 909
 910         if (buf[0] == '\0') {
 911                 DEBUG(0, ("Invalid Request (empty)\n"));
 912                 x_fprintf(x_stdout, "ERR\n");
 913                 return;
 914         }
 915
 916         if (opt_multiplex) {
 917                 if (sscanf(buf, "%u ", &mux_id) != 1) {
 918                         DEBUG(0, ("Invalid Request - no multiplex id\n"));
 919                         x_fprintf(x_stdout, "ERR\n");
 920                         return;
 921                 }
 922                 if (!mux_private) {
 923                         mux_private = talloc(NULL, struct mux_private);
 924                         mux_private->max_mux = 0;
 925                         mux_private->private_pointers = NULL;
 926                 }
 927
 928                 c=strchr(buf,' ');
 929                 if (!c) {
 930                         DEBUG(0, ("Invalid Request - no data after multiplex id\n"));
 931                         x_fprintf(x_stdout, "ERR\n");
 932                         return;
 933                 }
 934                 c++;
 935                 if (mux_id >= mux_private->max_mux) {
 936                         unsigned int prev_max = mux_private->max_mux;
 937                         mux_private->max_mux = mux_id + 1;
 938                         mux_private->private_pointers
 939                                 = talloc_realloc(mux_private,
 940                                                    mux_private->private_pointers,
 941                                                    void *, mux_private->max_mux);
 942                         memset(&mux_private->private_pointers[prev_max], '\0',
 943                                (sizeof(*mux_private->private_pointers) * (mux_private->max_mux - prev_max)));
 944                 };
 945
 946                 private = &mux_private->private_pointers[mux_id];
 947         } else {
 948                 c = buf;
 949                 private = &normal_private;
 950         }
 951
 952         fn(helper_mode, c, length, private, mux_id, private2);
 953 }
 954
 955 static void squid_stream(enum stdio_helper_mode stdio_mode,
 956                          stdio_helper_function fn) {
 957         /* initialize FDescs */
 958         x_setbuf(x_stdout, NULL);
 959         x_setbuf(x_stderr, NULL);
 960         while(1) {
 961                 manage_squid_request(stdio_mode, fn, NULL);
 962         }
 963 }
 964
 965
 966 /* Main program */
 967
 968 enum {
 969         OPT_USERNAME = 1000,
 970         OPT_DOMAIN,
 971         OPT_WORKSTATION,
 972         OPT_CHALLENGE,
 973         OPT_RESPONSE,
 974         OPT_LM,
 975         OPT_NT,
 976         OPT_PASSWORD,
 977         OPT_LM_KEY,
 978         OPT_USER_SESSION_KEY,
 979         OPT_DIAGNOSTICS,
 980         OPT_REQUIRE_MEMBERSHIP,
 981         OPT_MULTIPLEX,
 982         OPT_USE_CACHED_CREDS,
 983 };
 984
 985 int main(int argc, const char **argv)
 986 {
 987         static const char *helper_protocol;
 988         int opt;
 989
 990         poptContext pc;
 991
 992         /* NOTE: DO NOT change this interface without considering the implications!
 993            This is an external interface, which other programs will use to interact
 994            with this helper.
 995         */
 996
 997         /* We do not use single-letter command abbreviations, because they harm future
 998            interface stability. */
 999
1000         struct poptOption long_options[] = {
1001                 POPT_AUTOHELP
1002                 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
1003                 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
1004                 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
1005                 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"},
1006                 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
1007                 { "multiplex", 0, POPT_ARG_NONE, &opt_multiplex, OPT_MULTIPLEX, "Multiplex Mode"},
1008                 { "use-cached-creds", 0, POPT_ARG_NONE, &use_cached_creds, OPT_USE_CACHED_CREDS, "silently ignored for compatibility reasons"},
1009                 POPT_COMMON_SAMBA
1010                 POPT_COMMON_VERSION
1011                 { NULL }
1012         };
1013
1014         /* Samba client initialisation */
1015
1016         setup_logging(NULL, DEBUG_STDERR);
1017
1018         /* Parse options */
1019
1020         pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
1021
1022         /* Parse command line options */
1023
1024         if (argc == 1) {
1025                 poptPrintHelp(pc, stderr, 0);
1026                 return 1;
1027         }
1028
1029         pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
1030                             POPT_CONTEXT_KEEP_FIRST);
1031
1032         while((opt = poptGetNextOpt(pc)) != -1) {
1033                 if (opt < -1) {
1034                         break;
1035                 }
1036         }
1037         if (opt < -1) {
1038                 fprintf(stderr, "%s: %s\n",
1039                         poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1040                         poptStrerror(opt));
1041                 return 1;
1042         }
1043
1044         gensec_init();
1045
1046         if (opt_domain == NULL) {
1047                 opt_domain = lp_workgroup();
1048         }
1049
1050         if (helper_protocol) {
1051                 int i;
1052                 for (i=0; i<NUM_HELPER_MODES; i++) {
1053                         if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
1054                                 squid_stream(stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
1055                                 exit(0);
1056                         }
1057                 }
1058                 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
1059
1060                 for (i=0; i<NUM_HELPER_MODES; i++) {
1061                         x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
1062                 }
1063
1064                 exit(1);
1065         }
1066
1067         if (!opt_username) {
1068                 x_fprintf(x_stderr, "username must be specified!\n\n");
1069                 poptPrintHelp(pc, stderr, 0);
1070                 exit(1);
1071         }
1072
1073         if (opt_workstation == NULL) {
1074                 opt_workstation = lp_netbios_name();
1075         }
1076
1077         if (!opt_password) {
1078                 opt_password = getpass("password: ");
1079         }
1080
1081         {
1082                 char *user;
1083
1084                 asprintf(&user, "%s%c%s", opt_domain, *lp_winbind_separator(), opt_username);
1085                 if (!check_plaintext_auth(user, opt_password, True)) {
1086                         return 1;
1087                 }
1088         }
1089
1090         /* Exit code */
1091
1092         poptFreeContext(pc);
1093         return 0;
1094 }