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 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "system/filesys.h"
  26 #include "lib/cmdline/popt_common.h"
  27 #include "lib/ldb/include/ldb.h"
  28 #include "auth/credentials/credentials.h"
  29 #include "auth/gensec/gensec.h"
  30 #include "auth/auth.h"
  31 #include "librpc/gen_ndr/ndr_netlogon.h"
  32 #include "auth/auth_sam.h"
  33 #include "pstring.h"
  34 #include "libcli/auth/libcli_auth.h"
  35 #include "libcli/security/security.h"
  36 #include "lib/events/events.h"
  37 #include "lib/messaging/messaging.h"
  38 #include "lib/messaging/irpc.h"
  39 #include "auth/ntlmssp/ntlmssp.h"
  40 #include "param/param.h"
  41
  42 #define INITIAL_BUFFER_SIZE 300
  43 #define MAX_BUFFER_SIZE 63000
  44
  45 enum stdio_helper_mode {
  46         SQUID_2_4_BASIC,
  47         SQUID_2_5_BASIC,
  48         SQUID_2_5_NTLMSSP,
  49         NTLMSSP_CLIENT_1,
  50         GSS_SPNEGO_CLIENT,
  51         GSS_SPNEGO_SERVER,
  52         NTLM_SERVER_1,
  53         NUM_HELPER_MODES
  54 };
  55
  56 #define NTLM_AUTH_FLAG_USER_SESSION_KEY     0x0004
  57 #define NTLM_AUTH_FLAG_LMKEY                0x0008
  58
  59
  60 typedef void (*stdio_helper_function)(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_squid_basic_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_gensec_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_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode,
  73                                           char *buf, int length, void **private,
  74                                           unsigned int mux_id, void **private2);
  75
  76 static void manage_squid_request(enum stdio_helper_mode helper_mode,
  77                                  stdio_helper_function fn, void **private2);
  78
  79 static const struct {
  80         enum stdio_helper_mode mode;
  81         const char *name;
  82         stdio_helper_function fn;
  83 } stdio_helper_protocols[] = {
  84         { SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
  85         { SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
  86         { SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request},
  87         { GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request},
  88         { GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request},
  89         { NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request},
  90         { NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
  91         { NUM_HELPER_MODES, NULL, NULL}
  92 };
  93
  94 extern int winbindd_fd;
  95
  96 static const char *opt_username;
  97 static const char *opt_domain;
  98 static const char *opt_workstation;
  99 static const char *opt_password;
 100 static int opt_multiplex;
 101 static int use_cached_creds;
 102
 103
 104 static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
 105
 106 static void mux_printf(unsigned int mux_id, const char *format, ...)
 107 {
 108         va_list ap;
 109
 110         if (opt_multiplex) {
 111                 x_fprintf(x_stdout, "%d ", mux_id);
 112         }
 113
 114         va_start(ap, format);
 115         x_vfprintf(x_stdout, format, ap);
 116         va_end(ap);
 117 }
 118
 119
 120
 121 /* Copy of parse_domain_user from winbindd_util.c.  Parse a string of the
 122    form DOMAIN/user into a domain and a user */
 123
 124 static bool parse_ntlm_auth_domain_user(const char *domuser, fstring domain,
 125                                         fstring user)
 126 {
 127
 128         char *p = strchr(domuser,*lp_winbind_separator(global_loadparm));
 129
 130         if (!p) {
 131                 return false;
 132         }
 133
 134         fstrcpy(user, p+1);
 135         fstrcpy(domain, domuser);
 136         domain[PTR_DIFF(p, domuser)] = 0;
 137
 138         return true;
 139 }
 140
 141 /**
 142  * Decode a base64 string into a DATA_BLOB - simple and slow algorithm
 143  **/
 144 static DATA_BLOB base64_decode_data_blob(TALLOC_CTX *mem_ctx, const char *s)
 145 {
 146         DATA_BLOB ret = data_blob_talloc(mem_ctx, s, strlen(s)+1);
 147         ret.length = ldb_base64_decode((char *)ret.data);
 148         return ret;
 149 }
 150
 151 /**
 152  * Encode a base64 string into a talloc()ed string caller to free.
 153  **/
 154 static char *base64_encode_data_blob(TALLOC_CTX *mem_ctx, DATA_BLOB data)
 155 {
 156         return ldb_base64_encode(mem_ctx, (const char *)data.data, data.length);
 157 }
 158
 159 /**
 160  * Decode a base64 string in-place - wrapper for the above
 161  **/
 162 static void base64_decode_inplace(char *s)
 163 {
 164         ldb_base64_decode(s);
 165 }
 166
 167
 168
 169 /* Authenticate a user with a plaintext password */
 170
 171 static bool check_plaintext_auth(const char *user, const char *pass,
 172                                  bool stdout_diagnostics)
 173 {
 174         return (strcmp(pass, opt_password) == 0);
 175 }
 176
 177 /* authenticate a user with an encrypted username/password */
 178
 179 static NTSTATUS local_pw_check_specified(struct loadparm_context *lp_ctx,
 180                                          const char *username,
 181                                          const char *domain,
 182                                          const char *workstation,
 183                                          const DATA_BLOB *challenge,
 184                                          const DATA_BLOB *lm_response,
 185                                          const DATA_BLOB *nt_response,
 186                                          uint32_t flags,
 187                                          DATA_BLOB *lm_session_key,
 188                                          DATA_BLOB *user_session_key,
 189                                          char **error_string,
 190                                          char **unix_name)
 191 {
 192         NTSTATUS nt_status;
 193         struct samr_Password lm_pw, nt_pw;
 194         struct samr_Password *lm_pwd, *nt_pwd;
 195         TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
 196         if (!mem_ctx) {
 197                 nt_status = NT_STATUS_NO_MEMORY;
 198         } else {
 199
 200                 E_md4hash(opt_password, nt_pw.hash);
 201                 if (E_deshash(opt_password, lm_pw.hash)) {
 202                         lm_pwd = &lm_pw;
 203                 } else {
 204                         lm_pwd = NULL;
 205                 }
 206                 nt_pwd = &nt_pw;
 207
 208
 209                 nt_status = ntlm_password_check(mem_ctx,
 210                                                 lp_ctx,
 211                                                 MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT |
 212                                                 MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
 213                                                 challenge,
 214                                                 lm_response,
 215                                                 nt_response,
 216                                                 username,
 217                                                 username,
 218                                                 domain,
 219                                                 lm_pwd, nt_pwd, user_session_key, lm_session_key);
 220
 221                 if (NT_STATUS_IS_OK(nt_status)) {
 222                         if (unix_name) {
 223                                 asprintf(unix_name,
 224                                          "%s%c%s", domain,
 225                                          *lp_winbind_separator(global_loadparm),
 226                                          username);
 227                         }
 228                 } else {
 229                         DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
 230                                   domain, username, workstation,
 231                                   nt_errstr(nt_status)));
 232                 }
 233                 talloc_free(mem_ctx);
 234         }
 235         if (error_string) {
 236                 *error_string = strdup(nt_errstr(nt_status));
 237         }
 238         return nt_status;
 239
 240
 241 }
 242
 243 static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode,
 244                                        char *buf, int length, void **private,
 245                                        unsigned int mux_id, void **private2)
 246 {
 247         char *user, *pass;
 248         user=buf;
 249
 250         pass = memchr(buf, ' ', length);
 251         if (!pass) {
 252                 DEBUG(2, ("Password not found. Denying access\n"));
 253                 mux_printf(mux_id, "ERR\n");
 254                 return;
 255         }
 256         *pass='\0';
 257         pass++;
 258
 259         if (stdio_helper_mode == SQUID_2_5_BASIC) {
 260                 rfc1738_unescape(user);
 261                 rfc1738_unescape(pass);
 262         }
 263
 264         if (check_plaintext_auth(user, pass, false)) {
 265                 mux_printf(mux_id, "OK\n");
 266         } else {
 267                 mux_printf(mux_id, "ERR\n");
 268         }
 269 }
 270
 271 /* This is a bit hairy, but the basic idea is to do a password callback
 272    to the calling application.  The callback comes from within gensec */
 273
 274 static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode,
 275                                          char *buf, int length, void **private,
 276                                          unsigned int mux_id, void **password)
 277 {
 278         DATA_BLOB in;
 279         if (strlen(buf) < 2) {
 280                 DEBUG(1, ("query [%s] invalid", buf));
 281                 mux_printf(mux_id, "BH\n");
 282                 return;
 283         }
 284
 285         if (strlen(buf) > 3) {
 286                 in = base64_decode_data_blob(NULL, buf + 3);
 287         } else {
 288                 in = data_blob(NULL, 0);
 289         }
 290
 291         if (strncmp(buf, "PW ", 3) == 0) {
 292
 293                 *password = talloc_strndup(*private /* hopefully the right gensec context, useful to use for talloc */,
 294                                            (const char *)in.data, in.length);
 295
 296                 if (*password == NULL) {
 297                         DEBUG(1, ("Out of memory\n"));
 298                         mux_printf(mux_id, "BH\n");
 299                         data_blob_free(&in);
 300                         return;
 301                 }
 302
 303                 mux_printf(mux_id, "OK\n");
 304                 data_blob_free(&in);
 305                 return;
 306         }
 307         DEBUG(1, ("Asked for (and expected) a password\n"));
 308         mux_printf(mux_id, "BH\n");
 309         data_blob_free(&in);
 310 }
 311
 312 /**
 313  * Callback for password credentails.  This is not async, and when
 314  * GENSEC and the credentails code is made async, it will look rather
 315  * different.
 316  */
 317
 318 static const char *get_password(struct cli_credentials *credentials)
 319 {
 320         char *password = NULL;
 321
 322         /* Ask for a password */
 323         mux_printf((unsigned int)credentials->priv_data, "PW\n");
 324         credentials->priv_data = NULL;
 325
 326         manage_squid_request(NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, (void **)&password);
 327         return password;
 328 }
 329
 330 /**
 331  Check if a string is part of a list.
 332 **/
 333 static bool in_list(const char *s, const char *list, bool casesensitive)
 334 {
 335         pstring tok;
 336         const char *p=list;
 337
 338         if (!list)
 339                 return false;
 340
 341         while (next_token(&p, tok, LIST_SEP, sizeof(tok))) {
 342                 if ((casesensitive?strcmp:strcasecmp_m)(tok,s) == 0)
 343                         return true;
 344         }
 345         return false;
 346 }
 347
 348 static void gensec_want_feature_list(struct gensec_security *state, char* feature_list)
 349 {
 350         if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list, true)) {
 351                 DEBUG(10, ("want GENSEC_FEATURE_SESSION_KEY\n"));
 352                 gensec_want_feature(state, GENSEC_FEATURE_SESSION_KEY);
 353         }
 354         if (in_list("NTLMSSP_FEATURE_SIGN", feature_list, true)) {
 355                 DEBUG(10, ("want GENSEC_FEATURE_SIGN\n"));
 356                 gensec_want_feature(state, GENSEC_FEATURE_SIGN);
 357         }
 358         if (in_list("NTLMSSP_FEATURE_SEAL", feature_list, true)) {
 359                 DEBUG(10, ("want GENSEC_FEATURE_SEAL\n"));
 360                 gensec_want_feature(state, GENSEC_FEATURE_SEAL);
 361         }
 362 }
 363
 364 static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode,
 365                                   char *buf, int length, void **private,
 366                                   unsigned int mux_id, void **private2)
 367 {
 368         DATA_BLOB in;
 369         DATA_BLOB out = data_blob(NULL, 0);
 370         char *out_base64 = NULL;
 371         const char *reply_arg = NULL;
 372         struct gensec_ntlm_state {
 373                 struct gensec_security *gensec_state;
 374                 const char *set_password;
 375         };
 376         struct gensec_ntlm_state *state;
 377         struct event_context *ev;
 378         struct messaging_context *msg;
 379
 380         NTSTATUS nt_status;
 381         bool first = false;
 382         const char *reply_code;
 383         struct cli_credentials *creds;
 384
 385         static char *want_feature_list = NULL;
 386         static DATA_BLOB session_key;
 387
 388         TALLOC_CTX *mem_ctx;
 389
 390         if (*private) {
 391                 state = (struct gensec_ntlm_state *)*private;
 392         } else {
 393                 state = talloc_zero(NULL, struct gensec_ntlm_state);
 394                 if (!state) {
 395                         mux_printf(mux_id, "BH No Memory\n");
 396                         exit(1);
 397                 }
 398                 *private = state;
 399                 if (opt_password) {
 400                         state->set_password = opt_password;
 401                 }
 402         }
 403
 404         if (strlen(buf) < 2) {
 405                 DEBUG(1, ("query [%s] invalid", buf));
 406                 mux_printf(mux_id, "BH\n");
 407                 return;
 408         }
 409
 410         if (strlen(buf) > 3) {
 411                 if(strncmp(buf, "SF ", 3) == 0) {
 412                         DEBUG(10, ("Setting flags to negotiate\n"));
 413                         talloc_free(want_feature_list);
 414                         want_feature_list = talloc_strndup(state, buf+3, strlen(buf)-3);
 415                         mux_printf(mux_id, "OK\n");
 416                         return;
 417                 }
 418                 in = base64_decode_data_blob(NULL, buf + 3);
 419         } else {
 420                 in = data_blob(NULL, 0);
 421         }
 422
 423         if (strncmp(buf, "YR", 2) == 0) {
 424                 if (state->gensec_state) {
 425                         talloc_free(state->gensec_state);
 426                         state->gensec_state = NULL;
 427                 }
 428         } else if ( (strncmp(buf, "OK", 2) == 0)) {
 429                 /* Just return BH, like ntlm_auth from Samba 3 does. */
 430                 mux_printf(mux_id, "BH\n");
 431                 data_blob_free(&in);
 432                 return;
 433         } else if ( (strncmp(buf, "TT ", 3) != 0) &&
 434                     (strncmp(buf, "KK ", 3) != 0) &&
 435                     (strncmp(buf, "AF ", 3) != 0) &&
 436                     (strncmp(buf, "NA ", 3) != 0) &&
 437                     (strncmp(buf, "UG", 2) != 0) &&
 438                     (strncmp(buf, "PW ", 3) != 0) &&
 439                     (strncmp(buf, "GK", 2) != 0) &&
 440                     (strncmp(buf, "GF", 2) != 0)) {
 441                 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
 442                 mux_printf(mux_id, "BH\n");
 443                 data_blob_free(&in);
 444                 return;
 445         }
 446
 447         /* setup gensec */
 448         if (!(state->gensec_state)) {
 449                 switch (stdio_helper_mode) {
 450                 case GSS_SPNEGO_CLIENT:
 451                 case NTLMSSP_CLIENT_1:
 452                         /* setup the client side */
 453
 454                         nt_status = gensec_client_start(NULL, &state->gensec_state, NULL);
 455                         if (!NT_STATUS_IS_OK(nt_status)) {
 456                                 exit(1);
 457                         }
 458
 459                         break;
 460                 case GSS_SPNEGO_SERVER:
 461                 case SQUID_2_5_NTLMSSP:
 462                         ev = event_context_init(state);
 463                         if (!ev) {
 464                                 exit(1);
 465                         }
 466                         msg = messaging_client_init(state, lp_messaging_path(state, global_loadparm), ev);
 467                         if (!msg) {
 468                                 exit(1);
 469                         }
 470                         if (!NT_STATUS_IS_OK(gensec_server_start(state, ev, msg, &state->gensec_state))) {
 471                                 exit(1);
 472                         }
 473                         break;
 474                 default:
 475                         abort();
 476                 }
 477
 478                 creds = cli_credentials_init(state->gensec_state);
 479                 cli_credentials_set_conf(creds, global_loadparm);
 480                 if (opt_username) {
 481                         cli_credentials_set_username(creds, opt_username, CRED_SPECIFIED);
 482                 }
 483                 if (opt_domain) {
 484                         cli_credentials_set_domain(creds, opt_domain, CRED_SPECIFIED);
 485                 }
 486                 if (state->set_password) {
 487                         cli_credentials_set_password(creds, state->set_password, CRED_SPECIFIED);
 488                 } else {
 489                         cli_credentials_set_password_callback(creds, get_password);
 490                         creds->priv_data = (void*)mux_id;
 491                 }
 492                 if (opt_workstation) {
 493                         cli_credentials_set_workstation(creds, opt_workstation, CRED_SPECIFIED);
 494                 }
 495
 496                 switch (stdio_helper_mode) {
 497                 case GSS_SPNEGO_SERVER:
 498                 case SQUID_2_5_NTLMSSP:
 499                         cli_credentials_set_machine_account(creds);
 500                         break;
 501                 default:
 502                         break;
 503                 }
 504
 505                 gensec_set_credentials(state->gensec_state, creds);
 506                 gensec_want_feature_list(state->gensec_state, want_feature_list);
 507
 508                 switch (stdio_helper_mode) {
 509                 case GSS_SPNEGO_CLIENT:
 510                 case GSS_SPNEGO_SERVER:
 511                         nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_SPNEGO);
 512                         if (!in.length) {
 513                                 first = true;
 514                         }
 515                         break;
 516                 case NTLMSSP_CLIENT_1:
 517                         if (!in.length) {
 518                                 first = true;
 519                         }
 520                         /* fall through */
 521                 case SQUID_2_5_NTLMSSP:
 522                         nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_NTLMSSP);
 523                         break;
 524                 default:
 525                         abort();
 526                 }
 527
 528                 if (!NT_STATUS_IS_OK(nt_status)) {
 529                         DEBUG(1, ("GENSEC mech failed to start: %s\n", nt_errstr(nt_status)));
 530                         mux_printf(mux_id, "BH\n");
 531                         return;
 532                 }
 533
 534         }
 535
 536         /* update */
 537         mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");
 538
 539         if (strncmp(buf, "PW ", 3) == 0) {
 540                 state->set_password = talloc_strndup(state,
 541                                                      (const char *)in.data,
 542                                                      in.length);
 543
 544                 cli_credentials_set_password(gensec_get_credentials(state->gensec_state),
 545                                              state->set_password,
 546                                              CRED_SPECIFIED);
 547                 mux_printf(mux_id, "OK\n");
 548                 data_blob_free(&in);
 549                 talloc_free(mem_ctx);
 550                 return;
 551         }
 552
 553         if (strncmp(buf, "UG", 2) == 0) {
 554                 int i;
 555                 char *grouplist = NULL;
 556                 struct auth_session_info *session_info;
 557
 558                 nt_status = gensec_session_info(state->gensec_state, &session_info);
 559                 if (!NT_STATUS_IS_OK(nt_status)) {
 560                         DEBUG(1, ("gensec_session_info failed: %s\n", nt_errstr(nt_status)));
 561                         mux_printf(mux_id, "BH %s\n", nt_errstr(nt_status));
 562                         data_blob_free(&in);
 563                         talloc_free(mem_ctx);
 564                         return;
 565                 }
 566
 567                 /* get the string onto the context */
 568                 grouplist = talloc_strdup(mem_ctx, "");
 569
 570                 for (i=0; i<session_info->security_token->num_sids; i++) {
 571                         struct security_token *token = session_info->security_token;
 572                         const char *sidstr = dom_sid_string(session_info,
 573                                                             token->sids[i]);
 574                         grouplist = talloc_asprintf_append_buffer(grouplist, "%s,", sidstr);
 575                 }
 576
 577                 mux_printf(mux_id, "GL %s\n", grouplist);
 578                 talloc_free(session_info);
 579                 data_blob_free(&in);
 580                 talloc_free(mem_ctx);
 581                 return;
 582         }
 583
 584         if (strncmp(buf, "GK", 2) == 0) {
 585                 char *base64_key;
 586                 DEBUG(10, ("Requested session key\n"));
 587                 nt_status = gensec_session_key(state->gensec_state, &session_key);
 588                 if(!NT_STATUS_IS_OK(nt_status)) {
 589                         DEBUG(1, ("gensec_session_key failed: %s\n", nt_errstr(nt_status)));
 590                         mux_printf(mux_id, "BH No session key\n");
 591                         talloc_free(mem_ctx);
 592                         return;
 593                 } else {
 594                         base64_key = base64_encode_data_blob(state, session_key);
 595                         mux_printf(mux_id, "GK %s\n", base64_key);
 596                         talloc_free(base64_key);
 597                 }
 598                 talloc_free(mem_ctx);
 599                 return;
 600         }
 601
 602         if (strncmp(buf, "GF", 2) == 0) {
 603                 struct gensec_ntlmssp_state *gensec_ntlmssp_state;
 604                 uint32_t neg_flags;
 605
 606                 gensec_ntlmssp_state = talloc_get_type(state->gensec_state->private_data,
 607                                 struct gensec_ntlmssp_state);
 608                 neg_flags = gensec_ntlmssp_state->neg_flags;
 609
 610                 DEBUG(10, ("Requested negotiated feature flags\n"));
 611                 mux_printf(mux_id, "GF 0x%08x\n", neg_flags);
 612                 return;
 613         }
 614
 615         nt_status = gensec_update(state->gensec_state, mem_ctx, in, &out);
 616
 617         /* don't leak 'bad password'/'no such user' info to the network client */
 618         nt_status = auth_nt_status_squash(nt_status);
 619
 620         if (out.length) {
 621                 out_base64 = base64_encode_data_blob(mem_ctx, out);
 622         } else {
 623                 out_base64 = NULL;
 624         }
 625
 626         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 627                 reply_arg = "*";
 628                 if (first) {
 629                         reply_code = "YR";
 630                 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
 631                         reply_code = "KK";
 632                 } else if (state->gensec_state->gensec_role == GENSEC_SERVER) {
 633                         reply_code = "TT";
 634                 } else {
 635                         abort();
 636                 }
 637
 638
 639         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
 640                 reply_code = "BH";
 641                 reply_arg = nt_errstr(nt_status);
 642                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 643         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
 644                 reply_code = "BH";
 645                 reply_arg = nt_errstr(nt_status);
 646                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 647         } else if (!NT_STATUS_IS_OK(nt_status)) {
 648                 reply_code = "NA";
 649                 reply_arg = nt_errstr(nt_status);
 650                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 651         } else if /* OK */ (state->gensec_state->gensec_role == GENSEC_SERVER) {
 652                 struct auth_session_info *session_info;
 653
 654                 nt_status = gensec_session_info(state->gensec_state, &session_info);
 655                 if (!NT_STATUS_IS_OK(nt_status)) {
 656                         reply_code = "BH";
 657                         reply_arg = nt_errstr(nt_status);
 658                         DEBUG(1, ("GENSEC failed to retreive the session info: %s\n", nt_errstr(nt_status)));
 659                 } else {
 660
 661                         reply_code = "AF";
 662                         reply_arg = talloc_asprintf(state->gensec_state,
 663                                                     "%s%s%s", session_info->server_info->domain_name,
 664                                                     lp_winbind_separator(global_loadparm), session_info->server_info->account_name);
 665                         talloc_free(session_info);
 666                 }
 667         } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
 668                 reply_code = "AF";
 669                 reply_arg = out_base64;
 670         } else {
 671                 abort();
 672         }
 673
 674         switch (stdio_helper_mode) {
 675         case GSS_SPNEGO_SERVER:
 676                 mux_printf(mux_id, "%s %s %s\n", reply_code,
 677                           out_base64 ? out_base64 : "*",
 678                           reply_arg ? reply_arg : "*");
 679                 break;
 680         default:
 681                 if (out_base64) {
 682                         mux_printf(mux_id, "%s %s\n", reply_code, out_base64);
 683                 } else if (reply_arg) {
 684                         mux_printf(mux_id, "%s %s\n", reply_code, reply_arg);
 685                 } else {
 686                         mux_printf(mux_id, "%s\n", reply_code);
 687                 }
 688         }
 689
 690         talloc_free(mem_ctx);
 691         return;
 692 }
 693
 694 static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
 695                                          char *buf, int length, void **private,
 696                                          unsigned int mux_id, void **private2)
 697 {
 698         char *request, *parameter;
 699         static DATA_BLOB challenge;
 700         static DATA_BLOB lm_response;
 701         static DATA_BLOB nt_response;
 702         static char *full_username;
 703         static char *username;
 704         static char *domain;
 705         static char *plaintext_password;
 706         static bool ntlm_server_1_user_session_key;
 707         static bool ntlm_server_1_lm_session_key;
 708
 709         if (strequal(buf, ".")) {
 710                 if (!full_username && !username) {
 711                         mux_printf(mux_id, "Error: No username supplied!\n");
 712                 } else if (plaintext_password) {
 713                         /* handle this request as plaintext */
 714                         if (!full_username) {
 715                                 if (asprintf(&full_username, "%s%c%s", domain, *lp_winbind_separator(global_loadparm), username) == -1) {
 716                                         mux_printf(mux_id, "Error: Out of memory in asprintf!\n.\n");
 717                                         return;
 718                                 }
 719                         }
 720                         if (check_plaintext_auth(full_username, plaintext_password, false)) {
 721                                 mux_printf(mux_id, "Authenticated: Yes\n");
 722                         } else {
 723                                 mux_printf(mux_id, "Authenticated: No\n");
 724                         }
 725                 } else if (!lm_response.data && !nt_response.data) {
 726                         mux_printf(mux_id, "Error: No password supplied!\n");
 727                 } else if (!challenge.data) {
 728                         mux_printf(mux_id, "Error: No lanman-challenge supplied!\n");
 729                 } else {
 730                         char *error_string = NULL;
 731                         DATA_BLOB lm_key;
 732                         DATA_BLOB user_session_key;
 733                         uint32_t flags = 0;
 734
 735                         if (full_username && !username) {
 736                                 fstring fstr_user;
 737                                 fstring fstr_domain;
 738
 739                                 if (!parse_ntlm_auth_domain_user(full_username, fstr_user, fstr_domain)) {
 740                                         /* username might be 'tainted', don't print into our new-line deleimianted stream */
 741                                         mux_printf(mux_id, "Error: Could not parse into domain and username\n");
 742                                 }
 743                                 SAFE_FREE(username);
 744                                 SAFE_FREE(domain);
 745                                 username = smb_xstrdup(fstr_user);
 746                                 domain = smb_xstrdup(fstr_domain);
 747                         }
 748
 749                         if (!domain) {
 750                                 domain = smb_xstrdup(lp_workgroup(global_loadparm));
 751                         }
 752
 753                         if (ntlm_server_1_lm_session_key)
 754                                 flags |= NTLM_AUTH_FLAG_LMKEY;
 755
 756                         if (ntlm_server_1_user_session_key)
 757                                 flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY;
 758
 759                         if (!NT_STATUS_IS_OK(
 760                                     local_pw_check_specified(global_loadparm,
 761                                                              username,
 762                                                               domain,
 763                                                               lp_netbios_name(global_loadparm),
 764                                                               &challenge,
 765                                                               &lm_response,
 766                                                               &nt_response,
 767                                                               flags,
 768                                                               &lm_key,
 769                                                               &user_session_key,
 770                                                               &error_string,
 771                                                               NULL))) {
 772
 773                                 mux_printf(mux_id, "Authenticated: No\n");
 774                                 mux_printf(mux_id, "Authentication-Error: %s\n.\n", error_string);
 775                                 SAFE_FREE(error_string);
 776                         } else {
 777                                 static char zeros[16];
 778                                 char *hex_lm_key;
 779                                 char *hex_user_session_key;
 780
 781                                 mux_printf(mux_id, "Authenticated: Yes\n");
 782
 783                                 if (ntlm_server_1_lm_session_key
 784                                     && lm_key.length
 785                                     && (memcmp(zeros, lm_key.data,
 786                                                                 lm_key.length) != 0)) {
 787                                         hex_encode(lm_key.data,
 788                                                    lm_key.length,
 789                                                    &hex_lm_key);
 790                                         mux_printf(mux_id, "LANMAN-Session-Key: %s\n", hex_lm_key);
 791                                         SAFE_FREE(hex_lm_key);
 792                                 }
 793
 794                                 if (ntlm_server_1_user_session_key
 795                                     && user_session_key.length
 796                                     && (memcmp(zeros, user_session_key.data,
 797                                                user_session_key.length) != 0)) {
 798                                         hex_encode(user_session_key.data,
 799                                                    user_session_key.length,
 800                                                    &hex_user_session_key);
 801                                         mux_printf(mux_id, "User-Session-Key: %s\n", hex_user_session_key);
 802                                         SAFE_FREE(hex_user_session_key);
 803                                 }
 804                         }
 805                 }
 806                 /* clear out the state */
 807                 challenge = data_blob(NULL, 0);
 808                 nt_response = data_blob(NULL, 0);
 809                 lm_response = data_blob(NULL, 0);
 810                 SAFE_FREE(full_username);
 811                 SAFE_FREE(username);
 812                 SAFE_FREE(domain);
 813                 SAFE_FREE(plaintext_password);
 814                 ntlm_server_1_user_session_key = false;
 815                 ntlm_server_1_lm_session_key = false;
 816                 mux_printf(mux_id, ".\n");
 817
 818                 return;
 819         }
 820
 821         request = buf;
 822
 823         /* Indicates a base64 encoded structure */
 824         parameter = strstr(request, ":: ");
 825         if (!parameter) {
 826                 parameter = strstr(request, ": ");
 827
 828                 if (!parameter) {
 829                         DEBUG(0, ("Parameter not found!\n"));
 830                         mux_printf(mux_id, "Error: Parameter not found!\n.\n");
 831                         return;
 832                 }
 833
 834                 parameter[0] ='\0';
 835                 parameter++;
 836                 parameter[0] ='\0';
 837                 parameter++;
 838
 839         } else {
 840                 parameter[0] ='\0';
 841                 parameter++;
 842                 parameter[0] ='\0';
 843                 parameter++;
 844                 parameter[0] ='\0';
 845                 parameter++;
 846
 847                 base64_decode_inplace(parameter);
 848         }
 849
 850         if (strequal(request, "LANMAN-Challenge")) {
 851                 challenge = strhex_to_data_blob(parameter);
 852                 if (challenge.length != 8) {
 853                         mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
 854                                   parameter,
 855                                   (int)challenge.length);
 856                         challenge = data_blob(NULL, 0);
 857                 }
 858         } else if (strequal(request, "NT-Response")) {
 859                 nt_response = strhex_to_data_blob(parameter);
 860                 if (nt_response.length < 24) {
 861                         mux_printf(mux_id, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
 862                                   parameter,
 863                                   (int)nt_response.length);
 864                         nt_response = data_blob(NULL, 0);
 865                 }
 866         } else if (strequal(request, "LANMAN-Response")) {
 867                 lm_response = strhex_to_data_blob(parameter);
 868                 if (lm_response.length != 24) {
 869                         mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
 870                                   parameter,
 871                                   (int)lm_response.length);
 872                         lm_response = data_blob(NULL, 0);
 873                 }
 874         } else if (strequal(request, "Password")) {
 875                 plaintext_password = smb_xstrdup(parameter);
 876         } else if (strequal(request, "NT-Domain")) {
 877                 domain = smb_xstrdup(parameter);
 878         } else if (strequal(request, "Username")) {
 879                 username = smb_xstrdup(parameter);
 880         } else if (strequal(request, "Full-Username")) {
 881                 full_username = smb_xstrdup(parameter);
 882         } else if (strequal(request, "Request-User-Session-Key")) {
 883                 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
 884         } else if (strequal(request, "Request-LanMan-Session-Key")) {
 885                 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
 886         } else {
 887                 mux_printf(mux_id, "Error: Unknown request %s\n.\n", request);
 888         }
 889 }
 890
 891 static void manage_squid_request(enum stdio_helper_mode helper_mode,
 892                                  stdio_helper_function fn, void **private2)
 893 {
 894         char *buf;
 895         char tmp[INITIAL_BUFFER_SIZE+1];
 896         unsigned int mux_id = 0;
 897         int length, buf_size = 0;
 898         char *c;
 899         struct mux_private {
 900                 unsigned int max_mux;
 901                 void **private_pointers;
 902         };
 903
 904         static struct mux_private *mux_private;
 905         static void *normal_private;
 906         void **private;
 907
 908         buf = talloc_strdup(NULL, "");
 909
 910         if (buf == NULL) {
 911                 DEBUG(0, ("Failed to allocate memory for reading the input "
 912                           "buffer.\n"));
 913                 x_fprintf(x_stdout, "ERR\n");
 914                 return;
 915         }
 916
 917         do {
 918                 /* this is not a typo - x_fgets doesn't work too well under
 919                  * squid */
 920                 if (fgets(tmp, INITIAL_BUFFER_SIZE, stdin) == NULL) {
 921                         if (ferror(stdin)) {
 922                                 DEBUG(1, ("fgets() failed! dying..... errno=%d "
 923                                           "(%s)\n", ferror(stdin),
 924                                           strerror(ferror(stdin))));
 925
 926                                 exit(1);    /* BIIG buffer */
 927                         }
 928                         exit(0);
 929                 }
 930
 931                 buf = talloc_strdup_append_buffer(buf, tmp);
 932                 buf_size += INITIAL_BUFFER_SIZE;
 933
 934                 if (buf_size > MAX_BUFFER_SIZE) {
 935                         DEBUG(0, ("Invalid Request (too large)\n"));
 936                         x_fprintf(x_stdout, "ERR\n");
 937                         talloc_free(buf);
 938                         return;
 939                 }
 940
 941                 c = strchr(buf, '\n');
 942         } while (c == NULL);
 943
 944         *c = '\0';
 945         length = c-buf;
 946
 947         DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
 948
 949         if (buf[0] == '\0') {
 950                 DEBUG(0, ("Invalid Request (empty)\n"));
 951                 x_fprintf(x_stdout, "ERR\n");
 952                 talloc_free(buf);
 953                 return;
 954         }
 955
 956         if (opt_multiplex) {
 957                 if (sscanf(buf, "%u ", &mux_id) != 1) {
 958                         DEBUG(0, ("Invalid Request - no multiplex id\n"));
 959                         x_fprintf(x_stdout, "ERR\n");
 960                         talloc_free(buf);
 961                         return;
 962                 }
 963                 if (!mux_private) {
 964                         mux_private = talloc(NULL, struct mux_private);
 965                         mux_private->max_mux = 0;
 966                         mux_private->private_pointers = NULL;
 967                 }
 968
 969                 c=strchr(buf,' ');
 970                 if (!c) {
 971                         DEBUG(0, ("Invalid Request - no data after multiplex id\n"));
 972                         x_fprintf(x_stdout, "ERR\n");
 973                         talloc_free(buf);
 974                         return;
 975                 }
 976                 c++;
 977                 if (mux_id >= mux_private->max_mux) {
 978                         unsigned int prev_max = mux_private->max_mux;
 979                         mux_private->max_mux = mux_id + 1;
 980                         mux_private->private_pointers
 981                                 = talloc_realloc(mux_private,
 982                                                    mux_private->private_pointers,
 983                                                    void *, mux_private->max_mux);
 984                         memset(&mux_private->private_pointers[prev_max], '\0',
 985                                (sizeof(*mux_private->private_pointers) * (mux_private->max_mux - prev_max)));
 986                 };
 987
 988                 private = &mux_private->private_pointers[mux_id];
 989         } else {
 990                 c = buf;
 991                 private = &normal_private;
 992         }
 993
 994         fn(helper_mode, c, length, private, mux_id, private2);
 995         talloc_free(buf);
 996 }
 997
 998 static void squid_stream(enum stdio_helper_mode stdio_mode,
 999                          stdio_helper_function fn) {
1000         /* initialize FDescs */
1001         x_setbuf(x_stdout, NULL);
1002         x_setbuf(x_stderr, NULL);
1003         while(1) {
1004                 manage_squid_request(stdio_mode, fn, NULL);
1005         }
1006 }
1007
1008
1009 /* Main program */
1010
1011 enum {
1012         OPT_USERNAME = 1000,
1013         OPT_DOMAIN,
1014         OPT_WORKSTATION,
1015         OPT_CHALLENGE,
1016         OPT_RESPONSE,
1017         OPT_LM,
1018         OPT_NT,
1019         OPT_PASSWORD,
1020         OPT_LM_KEY,
1021         OPT_USER_SESSION_KEY,
1022         OPT_DIAGNOSTICS,
1023         OPT_REQUIRE_MEMBERSHIP,
1024         OPT_MULTIPLEX,
1025         OPT_USE_CACHED_CREDS,
1026 };
1027
1028 int main(int argc, const char **argv)
1029 {
1030         static const char *helper_protocol;
1031         int opt;
1032
1033         poptContext pc;
1034
1035         /* NOTE: DO NOT change this interface without considering the implications!
1036            This is an external interface, which other programs will use to interact
1037            with this helper.
1038         */
1039
1040         /* We do not use single-letter command abbreviations, because they harm future
1041            interface stability. */
1042
1043         struct poptOption long_options[] = {
1044                 POPT_AUTOHELP
1045                 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
1046                 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
1047                 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
1048                 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"},
1049                 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
1050                 { "multiplex", 0, POPT_ARG_NONE, &opt_multiplex, OPT_MULTIPLEX, "Multiplex Mode"},
1051                 { "use-cached-creds", 0, POPT_ARG_NONE, &use_cached_creds, OPT_USE_CACHED_CREDS, "silently ignored for compatibility reasons"},
1052                 POPT_COMMON_SAMBA
1053                 POPT_COMMON_VERSION
1054                 { NULL }
1055         };
1056
1057         /* Samba client initialisation */
1058
1059         setup_logging(NULL, DEBUG_STDERR);
1060
1061         /* Parse options */
1062
1063         pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
1064
1065         /* Parse command line options */
1066
1067         if (argc == 1) {
1068                 poptPrintHelp(pc, stderr, 0);
1069                 return 1;
1070         }
1071
1072         pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
1073                             POPT_CONTEXT_KEEP_FIRST);
1074
1075         while((opt = poptGetNextOpt(pc)) != -1) {
1076                 if (opt < -1) {
1077                         break;
1078                 }
1079         }
1080         if (opt < -1) {
1081                 fprintf(stderr, "%s: %s\n",
1082                         poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1083                         poptStrerror(opt));
1084                 return 1;
1085         }
1086
1087         gensec_init(global_loadparm);
1088
1089         if (opt_domain == NULL) {
1090                 opt_domain = lp_workgroup(global_loadparm);
1091         }
1092
1093         if (helper_protocol) {
1094                 int i;
1095                 for (i=0; i<NUM_HELPER_MODES; i++) {
1096                         if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
1097                                 squid_stream(stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
1098                                 exit(0);
1099                         }
1100                 }
1101                 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
1102
1103                 for (i=0; i<NUM_HELPER_MODES; i++) {
1104                         x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
1105                 }
1106
1107                 exit(1);
1108         }
1109
1110         if (!opt_username) {
1111                 x_fprintf(x_stderr, "username must be specified!\n\n");
1112                 poptPrintHelp(pc, stderr, 0);
1113                 exit(1);
1114         }
1115
1116         if (opt_workstation == NULL) {
1117                 opt_workstation = lp_netbios_name(global_loadparm);
1118         }
1119
1120         if (!opt_password) {
1121                 opt_password = getpass("password: ");
1122         }
1123
1124         {
1125                 char *user;
1126
1127                 asprintf(&user, "%s%c%s", opt_domain, *lp_winbind_separator(global_loadparm), opt_username);
1128                 if (!check_plaintext_auth(user, opt_password, true)) {
1129                         return 1;
1130                 }
1131         }
1132
1133         /* Exit code */
1134
1135         poptFreeContext(pc);
1136         return 0;
1137 }