source/utils/ntlm_auth.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind status program.
   5
   6    Copyright (C) Tim Potter      2000-2003
   7    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003-2004
   8    Copyright (C) Francesco Chemolli <kinkie@kame.usr.dsi.unimi.it> 2000
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26 #include "system/filesys.h"
  27 #include "lib/cmdline/popt_common.h"
  28 #include "auth/auth.h"
  29 #include "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
  98
  99 static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
 100
 101 static void mux_printf(unsigned int mux_id, const char *format, ...)
 102 {
 103         va_list ap;
 104
 105         if (opt_multiplex) {
 106                 x_fprintf(x_stdout, "%d ", mux_id);
 107         }
 108
 109         va_start(ap, format);
 110         x_vfprintf(x_stdout, format, ap);
 111         va_end(ap);
 112 }
 113
 114
 115
 116 /* Copy of parse_domain_user from winbindd_util.c.  Parse a string of the
 117    form DOMAIN/user into a domain and a user */
 118
 119 static BOOL parse_ntlm_auth_domain_user(const char *domuser, fstring domain,
 120                                         fstring user)
 121 {
 122
 123         char *p = strchr(domuser,*lp_winbind_separator());
 124
 125         if (!p) {
 126                 return False;
 127         }
 128
 129         fstrcpy(user, p+1);
 130         fstrcpy(domain, domuser);
 131         domain[PTR_DIFF(p, domuser)] = 0;
 132
 133         return True;
 134 }
 135
 136 /**
 137  * Decode a base64 string into a DATA_BLOB - simple and slow algorithm
 138  **/
 139 static DATA_BLOB base64_decode_data_blob(TALLOC_CTX *mem_ctx, const char *s)
 140 {
 141         DATA_BLOB ret = data_blob_talloc(mem_ctx, s, strlen(s)+1);
 142         ret.length = ldb_base64_decode((char *)ret.data);
 143         return ret;
 144 }
 145
 146 /**
 147  * Encode a base64 string into a talloc()ed string caller to free.
 148  **/
 149 static char *base64_encode_data_blob(TALLOC_CTX *mem_ctx, DATA_BLOB data)
 150 {
 151         return ldb_base64_encode(mem_ctx, (const char *)data.data, data.length);
 152 }
 153
 154 /**
 155  * Decode a base64 string in-place - wrapper for the above
 156  **/
 157 static void base64_decode_inplace(char *s)
 158 {
 159         ldb_base64_decode(s);
 160 }
 161
 162
 163
 164 /* Authenticate a user with a plaintext password */
 165
 166 static BOOL check_plaintext_auth(const char *user, const char *pass,
 167                                  BOOL stdout_diagnostics)
 168 {
 169         return (strcmp(pass, opt_password) == 0);
 170 }
 171
 172 /* authenticate a user with an encrypted username/password */
 173
 174 static NTSTATUS local_pw_check_specified(const char *username,
 175                                          const char *domain,
 176                                          const char *workstation,
 177                                          const DATA_BLOB *challenge,
 178                                          const DATA_BLOB *lm_response,
 179                                          const DATA_BLOB *nt_response,
 180                                          uint32_t flags,
 181                                          DATA_BLOB *lm_session_key,
 182                                          DATA_BLOB *user_session_key,
 183                                          char **error_string,
 184                                          char **unix_name)
 185 {
 186         NTSTATUS nt_status;
 187         struct samr_Password lm_pw, nt_pw;
 188         struct samr_Password *lm_pwd, *nt_pwd;
 189         TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
 190         if (!mem_ctx) {
 191                 nt_status = NT_STATUS_NO_MEMORY;
 192         } else {
 193
 194                 E_md4hash(opt_password, nt_pw.hash);
 195                 if (E_deshash(opt_password, lm_pw.hash)) {
 196                         lm_pwd = &lm_pw;
 197                 } else {
 198                         lm_pwd = NULL;
 199                 }
 200                 nt_pwd = &nt_pw;
 201
 202
 203                 nt_status = ntlm_password_check(mem_ctx,
 204                                                 MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT |
 205                                                 MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
 206                                                 challenge,
 207                                                 lm_response,
 208                                                 nt_response,
 209                                                 username,
 210                                                 username,
 211                                                 domain,
 212                                                 lm_pwd, nt_pwd, user_session_key, lm_session_key);
 213
 214                 if (NT_STATUS_IS_OK(nt_status)) {
 215                         if (unix_name) {
 216                                 asprintf(unix_name,
 217                                          "%s%c%s", domain,
 218                                          *lp_winbind_separator(),
 219                                          username);
 220                         }
 221                 } else {
 222                         DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
 223                                   domain, username, workstation,
 224                                   nt_errstr(nt_status)));
 225                 }
 226                 talloc_free(mem_ctx);
 227         }
 228         if (error_string) {
 229                 *error_string = strdup(nt_errstr(nt_status));
 230         }
 231         return nt_status;
 232
 233
 234 }
 235
 236 static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode,
 237                                        char *buf, int length, void **private,
 238                                        unsigned int mux_id, void **private2)
 239 {
 240         char *user, *pass;
 241         user=buf;
 242
 243         pass=memchr(buf,' ',length);
 244         if (!pass) {
 245                 DEBUG(2, ("Password not found. Denying access\n"));
 246                 mux_printf(mux_id, "ERR\n");
 247                 return;
 248         }
 249         *pass='\0';
 250         pass++;
 251
 252         if (stdio_helper_mode == SQUID_2_5_BASIC) {
 253                 rfc1738_unescape(user);
 254                 rfc1738_unescape(pass);
 255         }
 256
 257         if (check_plaintext_auth(user, pass, False)) {
 258                 mux_printf(mux_id, "OK\n");
 259         } else {
 260                 mux_printf(mux_id, "ERR\n");
 261         }
 262 }
 263
 264 /* This is a bit hairy, but the basic idea is to do a password callback
 265    to the calling application.  The callback comes from within gensec */
 266
 267 static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode,
 268                                          char *buf, int length, void **private,
 269                                          unsigned int mux_id, void **password)
 270 {
 271         DATA_BLOB in;
 272         if (strlen(buf) < 2) {
 273                 DEBUG(1, ("query [%s] invalid", buf));
 274                 mux_printf(mux_id, "BH\n");
 275                 return;
 276         }
 277
 278         if (strlen(buf) > 3) {
 279                 in = base64_decode_data_blob(NULL, buf + 3);
 280         } else {
 281                 in = data_blob(NULL, 0);
 282         }
 283
 284         if (strncmp(buf, "PW ", 3) == 0) {
 285
 286                 *password = talloc_strndup(*private /* hopefully the right gensec context, useful to use for talloc */,
 287                                            (const char *)in.data, in.length);
 288
 289                 if (*password == NULL) {
 290                         DEBUG(1, ("Out of memory\n"));
 291                         mux_printf(mux_id, "BH\n");
 292                         data_blob_free(&in);
 293                         return;
 294                 }
 295
 296                 mux_printf(mux_id, "OK\n");
 297                 data_blob_free(&in);
 298                 return;
 299         }
 300         DEBUG(1, ("Asked for (and expected) a password\n"));
 301         mux_printf(mux_id, "BH\n");
 302         data_blob_free(&in);
 303 }
 304
 305 /**
 306  * Callback for password credentails.  This is not async, and when
 307  * GENSEC and the credentails code is made async, it will look rather
 308  * different.
 309  */
 310
 311 static const char *get_password(struct cli_credentials *credentials)
 312 {
 313         char *password = NULL;
 314
 315         /* Ask for a password */
 316         mux_printf((unsigned int)credentials->priv_data, "PW\n");
 317         credentials->priv_data = NULL;
 318
 319         manage_squid_request(NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, (void **)&password);
 320         return password;
 321 }
 322
 323 static void gensec_want_feature_list(struct gensec_security *state, char* feature_list)
 324 {
 325         if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list, True)) {
 326                 DEBUG(10, ("want GENSEC_FEATURE_SESSION_KEY\n"));
 327                 gensec_want_feature(state, GENSEC_FEATURE_SESSION_KEY);
 328         }
 329         if (in_list("NTLMSSP_FEATURE_SIGN", feature_list, True)) {
 330                 DEBUG(10, ("want GENSEC_FEATURE_SIGN\n"));
 331                 gensec_want_feature(state, GENSEC_FEATURE_SIGN);
 332         }
 333         if (in_list("NTLMSSP_FEATURE_SEAL", feature_list, True)) {
 334                 DEBUG(10, ("want GENSEC_FEATURE_SEAL\n"));
 335                 gensec_want_feature(state, GENSEC_FEATURE_SEAL);
 336         }
 337 }
 338
 339 static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode,
 340                                   char *buf, int length, void **private,
 341                                   unsigned int mux_id, void **private2)
 342 {
 343         DATA_BLOB in;
 344         DATA_BLOB out = data_blob(NULL, 0);
 345         char *out_base64 = NULL;
 346         const char *reply_arg = NULL;
 347         struct gensec_ntlm_state {
 348                 struct gensec_security *gensec_state;
 349                 const char *set_password;
 350         };
 351         struct gensec_ntlm_state *state;
 352         struct event_context *ev;
 353         struct messaging_context *msg;
 354
 355         NTSTATUS nt_status;
 356         BOOL first = False;
 357         const char *reply_code;
 358         struct cli_credentials *creds;
 359
 360         static char *want_feature_list = NULL;
 361         static DATA_BLOB session_key;
 362
 363         TALLOC_CTX *mem_ctx;
 364
 365         if (*private) {
 366                 state = *private;
 367         } else {
 368                 state = talloc_zero(NULL, struct gensec_ntlm_state);
 369                 if (!state) {
 370                         mux_printf(mux_id, "BH No Memory\n");
 371                         exit(1);
 372                 }
 373                 *private = state;
 374                 if (opt_password) {
 375                         state->set_password = opt_password;
 376                 }
 377         }
 378
 379         if (strlen(buf) < 2) {
 380                 DEBUG(1, ("query [%s] invalid", buf));
 381                 mux_printf(mux_id, "BH\n");
 382                 return;
 383         }
 384
 385         if (strlen(buf) > 3) {
 386                 if(strncmp(buf, "SF ", 3) == 0) {
 387                         DEBUG(10, ("Setting flags to negotiate\n"));
 388                         talloc_free(want_feature_list);
 389                         want_feature_list = talloc_strndup(state, buf+3, strlen(buf)-3);
 390                         mux_printf(mux_id, "OK\n");
 391                         return;
 392                 }
 393                 in = base64_decode_data_blob(NULL, buf + 3);
 394         } else {
 395                 in = data_blob(NULL, 0);
 396         }
 397
 398         if (strncmp(buf, "YR", 2) == 0) {
 399                 if (state->gensec_state) {
 400                         talloc_free(state->gensec_state);
 401                         state->gensec_state = NULL;
 402                 }
 403         } else if ( (strncmp(buf, "OK", 2) == 0)) {
 404                 /* do nothing */
 405                 data_blob_free(&in);
 406                 return;
 407         } else if ( (strncmp(buf, "TT ", 3) != 0) &&
 408                     (strncmp(buf, "KK ", 3) != 0) &&
 409                     (strncmp(buf, "AF ", 3) != 0) &&
 410                     (strncmp(buf, "NA ", 3) != 0) &&
 411                     (strncmp(buf, "UG", 2) != 0) &&
 412                     (strncmp(buf, "PW ", 3) != 0) &&
 413                     (strncmp(buf, "GK", 2) != 0) &&
 414                     (strncmp(buf, "GF", 2) != 0)) {
 415                 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
 416                 mux_printf(mux_id, "BH\n");
 417                 data_blob_free(&in);
 418                 return;
 419         }
 420
 421         /* setup gensec */
 422         if (!(state->gensec_state)) {
 423                 switch (stdio_helper_mode) {
 424                 case GSS_SPNEGO_CLIENT:
 425                 case NTLMSSP_CLIENT_1:
 426                         /* setup the client side */
 427
 428                         nt_status = gensec_client_start(NULL, &state->gensec_state, NULL);
 429                         if (!NT_STATUS_IS_OK(nt_status)) {
 430                                 exit(1);
 431                         }
 432
 433                         break;
 434                 case GSS_SPNEGO_SERVER:
 435                 case SQUID_2_5_NTLMSSP:
 436                         ev = event_context_init(state);
 437                         if (!ev) {
 438                                 exit(1);
 439                         }
 440                         msg = messaging_client_init(state, ev);
 441                         if (!msg) {
 442                                 exit(1);
 443                         }
 444                         if (!NT_STATUS_IS_OK(gensec_server_start(state, ev, msg, &state->gensec_state))) {
 445                                 exit(1);
 446                         }
 447                         break;
 448                 default:
 449                         abort();
 450                 }
 451
 452                 creds = cli_credentials_init(state->gensec_state);
 453                 cli_credentials_set_conf(creds);
 454                 if (opt_username) {
 455                         cli_credentials_set_username(creds, opt_username, CRED_SPECIFIED);
 456                 }
 457                 if (opt_domain) {
 458                         cli_credentials_set_domain(creds, opt_domain, CRED_SPECIFIED);
 459                 }
 460                 if (state->set_password) {
 461                         cli_credentials_set_password(creds, state->set_password, CRED_SPECIFIED);
 462                 } else {
 463                         cli_credentials_set_password_callback(creds, get_password);
 464                         creds->priv_data = (void*)mux_id;
 465                 }
 466                 if (opt_workstation) {
 467                         cli_credentials_set_workstation(creds, opt_workstation, CRED_SPECIFIED);
 468                 }
 469
 470                 switch (stdio_helper_mode) {
 471                 case GSS_SPNEGO_SERVER:
 472                 case SQUID_2_5_NTLMSSP:
 473                         cli_credentials_set_machine_account(creds);
 474                         break;
 475                 default:
 476                         break;
 477                 }
 478
 479                 gensec_set_credentials(state->gensec_state, creds);
 480                 gensec_want_feature_list(state->gensec_state, want_feature_list);
 481
 482                 switch (stdio_helper_mode) {
 483                 case GSS_SPNEGO_CLIENT:
 484                 case GSS_SPNEGO_SERVER:
 485                         nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_SPNEGO);
 486                         if (!in.length) {
 487                                 first = True;
 488                         }
 489                         break;
 490                 case NTLMSSP_CLIENT_1:
 491                         if (!in.length) {
 492                                 first = True;
 493                         }
 494                         /* fall through */
 495                 case SQUID_2_5_NTLMSSP:
 496                         nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_NTLMSSP);
 497                         break;
 498                 default:
 499                         abort();
 500                 }
 501
 502                 if (!NT_STATUS_IS_OK(nt_status)) {
 503                         DEBUG(1, ("GENSEC mech failed to start: %s\n", nt_errstr(nt_status)));
 504                         mux_printf(mux_id, "BH\n");
 505                         return;
 506                 }
 507
 508         }
 509
 510         /* update */
 511         mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");
 512
 513         if (strncmp(buf, "PW ", 3) == 0) {
 514                 state->set_password = talloc_strndup(state,
 515                                                      (const char *)in.data,
 516                                                      in.length);
 517
 518                 cli_credentials_set_password(gensec_get_credentials(state->gensec_state),
 519                                              state->set_password,
 520                                              CRED_SPECIFIED);
 521                 mux_printf(mux_id, "OK\n");
 522                 data_blob_free(&in);
 523                 talloc_free(mem_ctx);
 524                 return;
 525         }
 526
 527         if (strncmp(buf, "UG", 2) == 0) {
 528                 int i;
 529                 char *grouplist = NULL;
 530                 struct auth_session_info *session_info;
 531
 532                 nt_status = gensec_session_info(state->gensec_state, &session_info);
 533                 if (!NT_STATUS_IS_OK(nt_status)) {
 534                         DEBUG(1, ("gensec_session_info failed: %s\n", nt_errstr(nt_status)));
 535                         mux_printf(mux_id, "BH %s\n", nt_errstr(nt_status));
 536                         data_blob_free(&in);
 537                         talloc_free(mem_ctx);
 538                         return;
 539                 }
 540
 541                 /* get the string onto the context */
 542                 grouplist = talloc_strdup(mem_ctx, "");
 543
 544                 for (i=0; i<session_info->security_token->num_sids; i++) {
 545                         struct security_token *token = session_info->security_token;
 546                         const char *sidstr = dom_sid_string(session_info,
 547                                                             token->sids[i]);
 548                         grouplist = talloc_asprintf_append(grouplist, "%s,", sidstr);
 549                 }
 550
 551                 mux_printf(mux_id, "GL %s\n", grouplist);
 552                 talloc_free(session_info);
 553                 data_blob_free(&in);
 554                 talloc_free(mem_ctx);
 555                 return;
 556         }
 557
 558         if (strncmp(buf, "GK", 2) == 0) {
 559                 char *base64_key;
 560                 DEBUG(10, ("Requested session key\n"));
 561                 nt_status = gensec_session_key(state->gensec_state, &session_key);
 562                 if(!NT_STATUS_IS_OK(nt_status)) {
 563                         DEBUG(1, ("gensec_session_key failed: %s\n", nt_errstr(nt_status)));
 564                         mux_printf(mux_id, "BH No session key\n");
 565                         talloc_free(mem_ctx);
 566                         return;
 567                 } else {
 568                         base64_key = base64_encode_data_blob(state, session_key);
 569                         mux_printf(mux_id, "GK %s\n", base64_key);
 570                         talloc_free(base64_key);
 571                 }
 572                 talloc_free(mem_ctx);
 573                 return;
 574         }
 575
 576         if (strncmp(buf, "GF", 2) == 0) {
 577                 struct gensec_ntlmssp_state *gensec_ntlmssp_state;
 578                 uint32_t neg_flags;
 579
 580                 gensec_ntlmssp_state = talloc_get_type(state->gensec_state->private_data,
 581                                 struct gensec_ntlmssp_state);
 582                 neg_flags = gensec_ntlmssp_state->neg_flags;
 583
 584                 DEBUG(10, ("Requested negotiated feature flags\n"));
 585                 mux_printf(mux_id, "GF 0x%08x\n", neg_flags);
 586                 return;
 587         }
 588
 589         nt_status = gensec_update(state->gensec_state, mem_ctx, in, &out);
 590
 591         /* don't leak 'bad password'/'no such user' info to the network client */
 592         nt_status = auth_nt_status_squash(nt_status);
 593
 594         if (out.length) {
 595                 out_base64 = base64_encode_data_blob(mem_ctx, out);
 596         } else {
 597                 out_base64 = NULL;
 598         }
 599
 600         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 601                 reply_arg = "*";
 602                 if (first) {
 603                         reply_code = "YR";
 604                 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
 605                         reply_code = "KK";
 606                 } else if (state->gensec_state->gensec_role == GENSEC_SERVER) {
 607                         reply_code = "TT";
 608                 } else {
 609                         abort();
 610                 }
 611
 612
 613         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
 614                 reply_code = "BH";
 615                 reply_arg = nt_errstr(nt_status);
 616                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 617         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
 618                 reply_code = "BH";
 619                 reply_arg = nt_errstr(nt_status);
 620                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 621         } else if (!NT_STATUS_IS_OK(nt_status)) {
 622                 reply_code = "NA";
 623                 reply_arg = nt_errstr(nt_status);
 624                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 625         } else if /* OK */ (state->gensec_state->gensec_role == GENSEC_SERVER) {
 626                 struct auth_session_info *session_info;
 627
 628                 nt_status = gensec_session_info(state->gensec_state, &session_info);
 629                 if (!NT_STATUS_IS_OK(nt_status)) {
 630                         reply_code = "BH";
 631                         reply_arg = nt_errstr(nt_status);
 632                         DEBUG(1, ("GENSEC failed to retreive the session info: %s\n", nt_errstr(nt_status)));
 633                 } else {
 634
 635                         reply_code = "AF";
 636                         reply_arg = talloc_asprintf(state->gensec_state,
 637                                                     "%s%s%s", session_info->server_info->domain_name,
 638                                                     lp_winbind_separator(), session_info->server_info->account_name);
 639                         talloc_free(session_info);
 640                 }
 641         } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
 642                 reply_code = "AF";
 643                 reply_arg = out_base64;
 644         } else {
 645                 abort();
 646         }
 647
 648         switch (stdio_helper_mode) {
 649         case GSS_SPNEGO_SERVER:
 650                 mux_printf(mux_id, "%s %s %s\n", reply_code,
 651                           out_base64 ? out_base64 : "*",
 652                           reply_arg ? reply_arg : "*");
 653                 break;
 654         default:
 655                 if (out_base64) {
 656                         mux_printf(mux_id, "%s %s\n", reply_code, out_base64);
 657                 } else if (reply_arg) {
 658                         mux_printf(mux_id, "%s %s\n", reply_code, reply_arg);
 659                 } else {
 660                         mux_printf(mux_id, "%s\n", reply_code);
 661                 }
 662         }
 663
 664         talloc_free(mem_ctx);
 665         return;
 666 }
 667
 668 static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
 669                                          char *buf, int length, void **private,
 670                                          unsigned int mux_id, void **private2)
 671 {
 672         char *request, *parameter;
 673         static DATA_BLOB challenge;
 674         static DATA_BLOB lm_response;
 675         static DATA_BLOB nt_response;
 676         static char *full_username;
 677         static char *username;
 678         static char *domain;
 679         static char *plaintext_password;
 680         static BOOL ntlm_server_1_user_session_key;
 681         static BOOL ntlm_server_1_lm_session_key;
 682
 683         if (strequal(buf, ".")) {
 684                 if (!full_username && !username) {
 685                         mux_printf(mux_id, "Error: No username supplied!\n");
 686                 } else if (plaintext_password) {
 687                         /* handle this request as plaintext */
 688                         if (!full_username) {
 689                                 if (asprintf(&full_username, "%s%c%s", domain, *lp_winbind_separator(), username) == -1) {
 690                                         mux_printf(mux_id, "Error: Out of memory in asprintf!\n.\n");
 691                                         return;
 692                                 }
 693                         }
 694                         if (check_plaintext_auth(full_username, plaintext_password, False)) {
 695                                 mux_printf(mux_id, "Authenticated: Yes\n");
 696                         } else {
 697                                 mux_printf(mux_id, "Authenticated: No\n");
 698                         }
 699                 } else if (!lm_response.data && !nt_response.data) {
 700                         mux_printf(mux_id, "Error: No password supplied!\n");
 701                 } else if (!challenge.data) {
 702                         mux_printf(mux_id, "Error: No lanman-challenge supplied!\n");
 703                 } else {
 704                         char *error_string = NULL;
 705                         DATA_BLOB lm_key;
 706                         DATA_BLOB user_session_key;
 707                         uint32_t flags = 0;
 708
 709                         if (full_username && !username) {
 710                                 fstring fstr_user;
 711                                 fstring fstr_domain;
 712
 713                                 if (!parse_ntlm_auth_domain_user(full_username, fstr_user, fstr_domain)) {
 714                                         /* username might be 'tainted', don't print into our new-line deleimianted stream */
 715                                         mux_printf(mux_id, "Error: Could not parse into domain and username\n");
 716                                 }
 717                                 SAFE_FREE(username);
 718                                 SAFE_FREE(domain);
 719                                 username = smb_xstrdup(fstr_user);
 720                                 domain = smb_xstrdup(fstr_domain);
 721                         }
 722
 723                         if (!domain) {
 724                                 domain = smb_xstrdup(lp_workgroup());
 725                         }
 726
 727                         if (ntlm_server_1_lm_session_key)
 728                                 flags |= NTLM_AUTH_FLAG_LMKEY;
 729
 730                         if (ntlm_server_1_user_session_key)
 731                                 flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY;
 732
 733                         if (!NT_STATUS_IS_OK(
 734                                     local_pw_check_specified(username,
 735                                                               domain,
 736                                                               lp_netbios_name(),
 737                                                               &challenge,
 738                                                               &lm_response,
 739                                                               &nt_response,
 740                                                               flags,
 741                                                               &lm_key,
 742                                                               &user_session_key,
 743                                                               &error_string,
 744                                                               NULL))) {
 745
 746                                 mux_printf(mux_id, "Authenticated: No\n");
 747                                 mux_printf(mux_id, "Authentication-Error: %s\n.\n", error_string);
 748                                 SAFE_FREE(error_string);
 749                         } else {
 750                                 static char zeros[16];
 751                                 char *hex_lm_key;
 752                                 char *hex_user_session_key;
 753
 754                                 mux_printf(mux_id, "Authenticated: Yes\n");
 755
 756                                 if (ntlm_server_1_lm_session_key
 757                                     && lm_key.length
 758                                     && (memcmp(zeros, lm_key.data,
 759                                                                 lm_key.length) != 0)) {
 760                                         hex_encode(lm_key.data,
 761                                                    lm_key.length,
 762                                                    &hex_lm_key);
 763                                         mux_printf(mux_id, "LANMAN-Session-Key: %s\n", hex_lm_key);
 764                                         SAFE_FREE(hex_lm_key);
 765                                 }
 766
 767                                 if (ntlm_server_1_user_session_key
 768                                     && user_session_key.length
 769                                     && (memcmp(zeros, user_session_key.data,
 770                                                user_session_key.length) != 0)) {
 771                                         hex_encode(user_session_key.data,
 772                                                    user_session_key.length,
 773                                                    &hex_user_session_key);
 774                                         mux_printf(mux_id, "User-Session-Key: %s\n", hex_user_session_key);
 775                                         SAFE_FREE(hex_user_session_key);
 776                                 }
 777                         }
 778                 }
 779                 /* clear out the state */
 780                 challenge = data_blob(NULL, 0);
 781                 nt_response = data_blob(NULL, 0);
 782                 lm_response = data_blob(NULL, 0);
 783                 SAFE_FREE(full_username);
 784                 SAFE_FREE(username);
 785                 SAFE_FREE(domain);
 786                 SAFE_FREE(plaintext_password);
 787                 ntlm_server_1_user_session_key = False;
 788                 ntlm_server_1_lm_session_key = False;
 789                 mux_printf(mux_id, ".\n");
 790
 791                 return;
 792         }
 793
 794         request = buf;
 795
 796         /* Indicates a base64 encoded structure */
 797         parameter = strstr(request, ":: ");
 798         if (!parameter) {
 799                 parameter = strstr(request, ": ");
 800
 801                 if (!parameter) {
 802                         DEBUG(0, ("Parameter not found!\n"));
 803                         mux_printf(mux_id, "Error: Parameter not found!\n.\n");
 804                         return;
 805                 }
 806
 807                 parameter[0] ='\0';
 808                 parameter++;
 809                 parameter[0] ='\0';
 810                 parameter++;
 811
 812         } else {
 813                 parameter[0] ='\0';
 814                 parameter++;
 815                 parameter[0] ='\0';
 816                 parameter++;
 817                 parameter[0] ='\0';
 818                 parameter++;
 819
 820                 base64_decode_inplace(parameter);
 821         }
 822
 823         if (strequal(request, "LANMAN-Challenge")) {
 824                 challenge = strhex_to_data_blob(parameter);
 825                 if (challenge.length != 8) {
 826                         mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
 827                                   parameter,
 828                                   (int)challenge.length);
 829                         challenge = data_blob(NULL, 0);
 830                 }
 831         } else if (strequal(request, "NT-Response")) {
 832                 nt_response = strhex_to_data_blob(parameter);
 833                 if (nt_response.length < 24) {
 834                         mux_printf(mux_id, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
 835                                   parameter,
 836                                   (int)nt_response.length);
 837                         nt_response = data_blob(NULL, 0);
 838                 }
 839         } else if (strequal(request, "LANMAN-Response")) {
 840                 lm_response = strhex_to_data_blob(parameter);
 841                 if (lm_response.length != 24) {
 842                         mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
 843                                   parameter,
 844                                   (int)lm_response.length);
 845                         lm_response = data_blob(NULL, 0);
 846                 }
 847         } else if (strequal(request, "Password")) {
 848                 plaintext_password = smb_xstrdup(parameter);
 849         } else if (strequal(request, "NT-Domain")) {
 850                 domain = smb_xstrdup(parameter);
 851         } else if (strequal(request, "Username")) {
 852                 username = smb_xstrdup(parameter);
 853         } else if (strequal(request, "Full-Username")) {
 854                 full_username = smb_xstrdup(parameter);
 855         } else if (strequal(request, "Request-User-Session-Key")) {
 856                 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
 857         } else if (strequal(request, "Request-LanMan-Session-Key")) {
 858                 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
 859         } else {
 860                 mux_printf(mux_id, "Error: Unknown request %s\n.\n", request);
 861         }
 862 }
 863
 864 static void manage_squid_request(enum stdio_helper_mode helper_mode,
 865                                  stdio_helper_function fn, void **private2)
 866 {
 867         char buf[SQUID_BUFFER_SIZE+1];
 868         unsigned int mux_id = 0;
 869         int length;
 870         char *c;
 871         static BOOL err;
 872         struct mux_private {
 873                 unsigned int max_mux;
 874                 void **private_pointers;
 875         };
 876
 877         static struct mux_private *mux_private;
 878         static void *normal_private;
 879         void **private;
 880
 881         /* this is not a typo - x_fgets doesn't work too well under squid */
 882         if (fgets(buf, sizeof(buf)-1, stdin) == NULL) {
 883                 if (ferror(stdin)) {
 884                         DEBUG(1, ("fgets() failed! dying..... errno=%d (%s)\n", ferror(stdin),
 885                                   strerror(ferror(stdin))));
 886
 887                         exit(1);    /* BIIG buffer */
 888                 }
 889                 exit(0);
 890         }
 891
 892         c=memchr(buf,'\n',sizeof(buf)-1);
 893         if (c) {
 894                 *c = '\0';
 895                 length = c-buf;
 896         } else {
 897                 err = 1;
 898                 return;
 899         }
 900         if (err) {
 901                 DEBUG(0, ("Oversized message\n"));
 902                 x_fprintf(x_stdout, "ERR\n");
 903                 err = 0;
 904                 return;
 905         }
 906
 907         DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
 908
 909         if (buf[0] == '\0') {
 910                 DEBUG(0, ("Invalid Request (empty)\n"));
 911                 x_fprintf(x_stdout, "ERR\n");
 912                 return;
 913         }
 914
 915         if (opt_multiplex) {
 916                 if (sscanf(buf, "%u ", &mux_id) != 1) {
 917                         DEBUG(0, ("Invalid Request - no multiplex id\n"));
 918                         x_fprintf(x_stdout, "ERR\n");
 919                         return;
 920                 }
 921                 if (!mux_private) {
 922                         mux_private = talloc(NULL, struct mux_private);
 923                         mux_private->max_mux = 0;
 924                         mux_private->private_pointers = NULL;
 925                 }
 926
 927                 c=strchr(buf,' ');
 928                 if (!c) {
 929                         DEBUG(0, ("Invalid Request - no data after multiplex id\n"));
 930                         x_fprintf(x_stdout, "ERR\n");
 931                         return;
 932                 }
 933                 c++;
 934                 if (mux_id >= mux_private->max_mux) {
 935                         unsigned int prev_max = mux_private->max_mux;
 936                         mux_private->max_mux = mux_id + 1;
 937                         mux_private->private_pointers
 938                                 = talloc_realloc(mux_private,
 939                                                    mux_private->private_pointers,
 940                                                    void *, mux_private->max_mux);
 941                         memset(&mux_private->private_pointers[prev_max], '\0',
 942                                (sizeof(*mux_private->private_pointers) * (mux_private->max_mux - prev_max)));
 943                 };
 944
 945                 private = &mux_private->private_pointers[mux_id];
 946         } else {
 947                 c = buf;
 948                 private = &normal_private;
 949         }
 950
 951         fn(helper_mode, c, length, private, mux_id, private2);
 952 }
 953
 954 static void squid_stream(enum stdio_helper_mode stdio_mode,
 955                          stdio_helper_function fn) {
 956         /* initialize FDescs */
 957         x_setbuf(x_stdout, NULL);
 958         x_setbuf(x_stderr, NULL);
 959         while(1) {
 960                 manage_squid_request(stdio_mode, fn, NULL);
 961         }
 962 }
 963
 964
 965 /* Main program */
 966
 967 enum {
 968         OPT_USERNAME = 1000,
 969         OPT_DOMAIN,
 970         OPT_WORKSTATION,
 971         OPT_CHALLENGE,
 972         OPT_RESPONSE,
 973         OPT_LM,
 974         OPT_NT,
 975         OPT_PASSWORD,
 976         OPT_LM_KEY,
 977         OPT_USER_SESSION_KEY,
 978         OPT_DIAGNOSTICS,
 979         OPT_REQUIRE_MEMBERSHIP,
 980         OPT_MULTIPLEX,
 981 };
 982
 983 int main(int argc, const char **argv)
 984 {
 985         static const char *helper_protocol;
 986         int opt;
 987
 988         poptContext pc;
 989
 990         /* NOTE: DO NOT change this interface without considering the implications!
 991            This is an external interface, which other programs will use to interact
 992            with this helper.
 993         */
 994
 995         /* We do not use single-letter command abbreviations, because they harm future
 996            interface stability. */
 997
 998         struct poptOption long_options[] = {
 999                 POPT_AUTOHELP
1000                 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
1001                 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
1002                 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
1003                 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"},
1004                 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
1005                 { "multiplex", 0, POPT_ARG_NONE, &opt_multiplex, OPT_MULTIPLEX, "Multiplex Mode"},
1006                 POPT_COMMON_SAMBA
1007                 POPT_COMMON_VERSION
1008                 { NULL }
1009         };
1010
1011         /* Samba client initialisation */
1012
1013         setup_logging(NULL, DEBUG_STDERR);
1014
1015         /* Parse options */
1016
1017         pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
1018
1019         /* Parse command line options */
1020
1021         if (argc == 1) {
1022                 poptPrintHelp(pc, stderr, 0);
1023                 return 1;
1024         }
1025
1026         pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
1027                             POPT_CONTEXT_KEEP_FIRST);
1028
1029         while((opt = poptGetNextOpt(pc)) != -1) {
1030                 if (opt < -1) {
1031                         break;
1032                 }
1033         }
1034         if (opt < -1) {
1035                 fprintf(stderr, "%s: %s\n",
1036                         poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1037                         poptStrerror(opt));
1038                 return 1;
1039         }
1040
1041         gensec_init();
1042
1043         if (opt_domain == NULL) {
1044                 opt_domain = lp_workgroup();
1045         }
1046
1047         if (helper_protocol) {
1048                 int i;
1049                 for (i=0; i<NUM_HELPER_MODES; i++) {
1050                         if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
1051                                 squid_stream(stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
1052                                 exit(0);
1053                         }
1054                 }
1055                 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
1056
1057                 for (i=0; i<NUM_HELPER_MODES; i++) {
1058                         x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
1059                 }
1060
1061                 exit(1);
1062         }
1063
1064         if (!opt_username) {
1065                 x_fprintf(x_stderr, "username must be specified!\n\n");
1066                 poptPrintHelp(pc, stderr, 0);
1067                 exit(1);
1068         }
1069
1070         if (opt_workstation == NULL) {
1071                 opt_workstation = lp_netbios_name();
1072         }
1073
1074         if (!opt_password) {
1075                 opt_password = getpass("password: ");
1076         }
1077
1078         {
1079                 char *user;
1080
1081                 asprintf(&user, "%s%c%s", opt_domain, *lp_winbind_separator(), opt_username);
1082                 if (!check_plaintext_auth(user, opt_password, True)) {
1083                         return 1;
1084                 }
1085         }
1086
1087         /* Exit code */
1088
1089         poptFreeContext(pc);
1090         return 0;
1091 }