source4/utils/ntlm_auth.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind status program.
   5
   6    Copyright (C) Tim Potter      2000-2003
   7    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003-2004
   8    Copyright (C) Francesco Chemolli <kinkie@kame.usr.dsi.unimi.it> 2000
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26 #include "system/filesys.h"
  27 #include "lib/cmdline/popt_common.h"
  28 #include "lib/ldb/include/ldb.h"
  29 #include "auth/credentials/credentials.h"
  30 #include "auth/gensec/gensec.h"
  31 #include "auth/auth.h"
  32 #include "librpc/gen_ndr/ndr_netlogon.h"
  33 #include "auth/auth_sam.h"
  34 #include "pstring.h"
  35 #include "libcli/auth/libcli_auth.h"
  36 #include "libcli/security/security.h"
  37 #include "lib/events/events.h"
  38 #include "lib/messaging/messaging.h"
  39 #include "lib/messaging/irpc.h"
  40 #include "auth/ntlmssp/ntlmssp.h"
  41
  42 #define SQUID_BUFFER_SIZE 2010
  43
  44 enum stdio_helper_mode {
  45         SQUID_2_4_BASIC,
  46         SQUID_2_5_BASIC,
  47         SQUID_2_5_NTLMSSP,
  48         NTLMSSP_CLIENT_1,
  49         GSS_SPNEGO_CLIENT,
  50         GSS_SPNEGO_SERVER,
  51         NTLM_SERVER_1,
  52         NUM_HELPER_MODES
  53 };
  54
  55 #define NTLM_AUTH_FLAG_USER_SESSION_KEY     0x0004
  56 #define NTLM_AUTH_FLAG_LMKEY                0x0008
  57
  58
  59 typedef void (*stdio_helper_function)(enum stdio_helper_mode stdio_helper_mode,
  60                                       char *buf, int length, void **private,
  61                                       unsigned int mux_id, void **private2);
  62
  63 static void manage_squid_basic_request (enum stdio_helper_mode stdio_helper_mode,
  64                                         char *buf, int length, void **private,
  65                                         unsigned int mux_id, void **private2);
  66
  67 static void manage_gensec_request (enum stdio_helper_mode stdio_helper_mode,
  68                                    char *buf, int length, void **private,
  69                                    unsigned int mux_id, void **private2);
  70
  71 static void manage_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode,
  72                                           char *buf, int length, void **private,
  73                                           unsigned int mux_id, void **private2);
  74
  75 static void manage_squid_request(enum stdio_helper_mode helper_mode,
  76                                  stdio_helper_function fn, void **private2);
  77
  78 static const struct {
  79         enum stdio_helper_mode mode;
  80         const char *name;
  81         stdio_helper_function fn;
  82 } stdio_helper_protocols[] = {
  83         { SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
  84         { SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
  85         { SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request},
  86         { GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request},
  87         { GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request},
  88         { NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request},
  89         { NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
  90         { NUM_HELPER_MODES, NULL, NULL}
  91 };
  92
  93 extern int winbindd_fd;
  94
  95 static const char *opt_username;
  96 static const char *opt_domain;
  97 static const char *opt_workstation;
  98 static const char *opt_password;
  99 static int opt_multiplex;
 100 static int use_cached_creds;
 101
 102
 103 static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
 104
 105 static void mux_printf(unsigned int mux_id, const char *format, ...)
 106 {
 107         va_list ap;
 108
 109         if (opt_multiplex) {
 110                 x_fprintf(x_stdout, "%d ", mux_id);
 111         }
 112
 113         va_start(ap, format);
 114         x_vfprintf(x_stdout, format, ap);
 115         va_end(ap);
 116 }
 117
 118
 119
 120 /* Copy of parse_domain_user from winbindd_util.c.  Parse a string of the
 121    form DOMAIN/user into a domain and a user */
 122
 123 static BOOL parse_ntlm_auth_domain_user(const char *domuser, fstring domain,
 124                                         fstring user)
 125 {
 126
 127         char *p = strchr(domuser,*lp_winbind_separator());
 128
 129         if (!p) {
 130                 return False;
 131         }
 132
 133         fstrcpy(user, p+1);
 134         fstrcpy(domain, domuser);
 135         domain[PTR_DIFF(p, domuser)] = 0;
 136
 137         return True;
 138 }
 139
 140 /**
 141  * Decode a base64 string into a DATA_BLOB - simple and slow algorithm
 142  **/
 143 static DATA_BLOB base64_decode_data_blob(TALLOC_CTX *mem_ctx, const char *s)
 144 {
 145         DATA_BLOB ret = data_blob_talloc(mem_ctx, s, strlen(s)+1);
 146         ret.length = ldb_base64_decode((char *)ret.data);
 147         return ret;
 148 }
 149
 150 /**
 151  * Encode a base64 string into a talloc()ed string caller to free.
 152  **/
 153 static char *base64_encode_data_blob(TALLOC_CTX *mem_ctx, DATA_BLOB data)
 154 {
 155         return ldb_base64_encode(mem_ctx, (const char *)data.data, data.length);
 156 }
 157
 158 /**
 159  * Decode a base64 string in-place - wrapper for the above
 160  **/
 161 static void base64_decode_inplace(char *s)
 162 {
 163         ldb_base64_decode(s);
 164 }
 165
 166
 167
 168 /* Authenticate a user with a plaintext password */
 169
 170 static BOOL check_plaintext_auth(const char *user, const char *pass,
 171                                  BOOL stdout_diagnostics)
 172 {
 173         return (strcmp(pass, opt_password) == 0);
 174 }
 175
 176 /* authenticate a user with an encrypted username/password */
 177
 178 static NTSTATUS local_pw_check_specified(const char *username,
 179                                          const char *domain,
 180                                          const char *workstation,
 181                                          const DATA_BLOB *challenge,
 182                                          const DATA_BLOB *lm_response,
 183                                          const DATA_BLOB *nt_response,
 184                                          uint32_t flags,
 185                                          DATA_BLOB *lm_session_key,
 186                                          DATA_BLOB *user_session_key,
 187                                          char **error_string,
 188                                          char **unix_name)
 189 {
 190         NTSTATUS nt_status;
 191         struct samr_Password lm_pw, nt_pw;
 192         struct samr_Password *lm_pwd, *nt_pwd;
 193         TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
 194         if (!mem_ctx) {
 195                 nt_status = NT_STATUS_NO_MEMORY;
 196         } else {
 197
 198                 E_md4hash(opt_password, nt_pw.hash);
 199                 if (E_deshash(opt_password, lm_pw.hash)) {
 200                         lm_pwd = &lm_pw;
 201                 } else {
 202                         lm_pwd = NULL;
 203                 }
 204                 nt_pwd = &nt_pw;
 205
 206
 207                 nt_status = ntlm_password_check(mem_ctx,
 208                                                 MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT |
 209                                                 MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
 210                                                 challenge,
 211                                                 lm_response,
 212                                                 nt_response,
 213                                                 username,
 214                                                 username,
 215                                                 domain,
 216                                                 lm_pwd, nt_pwd, user_session_key, lm_session_key);
 217
 218                 if (NT_STATUS_IS_OK(nt_status)) {
 219                         if (unix_name) {
 220                                 asprintf(unix_name,
 221                                          "%s%c%s", domain,
 222                                          *lp_winbind_separator(),
 223                                          username);
 224                         }
 225                 } else {
 226                         DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
 227                                   domain, username, workstation,
 228                                   nt_errstr(nt_status)));
 229                 }
 230                 talloc_free(mem_ctx);
 231         }
 232         if (error_string) {
 233                 *error_string = strdup(nt_errstr(nt_status));
 234         }
 235         return nt_status;
 236
 237
 238 }
 239
 240 static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode,
 241                                        char *buf, int length, void **private,
 242                                        unsigned int mux_id, void **private2)
 243 {
 244         char *user, *pass;
 245         user=buf;
 246
 247         pass=memchr(buf,' ',length);
 248         if (!pass) {
 249                 DEBUG(2, ("Password not found. Denying access\n"));
 250                 mux_printf(mux_id, "ERR\n");
 251                 return;
 252         }
 253         *pass='\0';
 254         pass++;
 255
 256         if (stdio_helper_mode == SQUID_2_5_BASIC) {
 257                 rfc1738_unescape(user);
 258                 rfc1738_unescape(pass);
 259         }
 260
 261         if (check_plaintext_auth(user, pass, False)) {
 262                 mux_printf(mux_id, "OK\n");
 263         } else {
 264                 mux_printf(mux_id, "ERR\n");
 265         }
 266 }
 267
 268 /* This is a bit hairy, but the basic idea is to do a password callback
 269    to the calling application.  The callback comes from within gensec */
 270
 271 static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode,
 272                                          char *buf, int length, void **private,
 273                                          unsigned int mux_id, void **password)
 274 {
 275         DATA_BLOB in;
 276         if (strlen(buf) < 2) {
 277                 DEBUG(1, ("query [%s] invalid", buf));
 278                 mux_printf(mux_id, "BH\n");
 279                 return;
 280         }
 281
 282         if (strlen(buf) > 3) {
 283                 in = base64_decode_data_blob(NULL, buf + 3);
 284         } else {
 285                 in = data_blob(NULL, 0);
 286         }
 287
 288         if (strncmp(buf, "PW ", 3) == 0) {
 289
 290                 *password = talloc_strndup(*private /* hopefully the right gensec context, useful to use for talloc */,
 291                                            (const char *)in.data, in.length);
 292
 293                 if (*password == NULL) {
 294                         DEBUG(1, ("Out of memory\n"));
 295                         mux_printf(mux_id, "BH\n");
 296                         data_blob_free(&in);
 297                         return;
 298                 }
 299
 300                 mux_printf(mux_id, "OK\n");
 301                 data_blob_free(&in);
 302                 return;
 303         }
 304         DEBUG(1, ("Asked for (and expected) a password\n"));
 305         mux_printf(mux_id, "BH\n");
 306         data_blob_free(&in);
 307 }
 308
 309 /**
 310  * Callback for password credentails.  This is not async, and when
 311  * GENSEC and the credentails code is made async, it will look rather
 312  * different.
 313  */
 314
 315 static const char *get_password(struct cli_credentials *credentials)
 316 {
 317         char *password = NULL;
 318
 319         /* Ask for a password */
 320         mux_printf((unsigned int)credentials->priv_data, "PW\n");
 321         credentials->priv_data = NULL;
 322
 323         manage_squid_request(NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, (void **)&password);
 324         return password;
 325 }
 326
 327 static void gensec_want_feature_list(struct gensec_security *state, char* feature_list)
 328 {
 329         if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list, True)) {
 330                 DEBUG(10, ("want GENSEC_FEATURE_SESSION_KEY\n"));
 331                 gensec_want_feature(state, GENSEC_FEATURE_SESSION_KEY);
 332         }
 333         if (in_list("NTLMSSP_FEATURE_SIGN", feature_list, True)) {
 334                 DEBUG(10, ("want GENSEC_FEATURE_SIGN\n"));
 335                 gensec_want_feature(state, GENSEC_FEATURE_SIGN);
 336         }
 337         if (in_list("NTLMSSP_FEATURE_SEAL", feature_list, True)) {
 338                 DEBUG(10, ("want GENSEC_FEATURE_SEAL\n"));
 339                 gensec_want_feature(state, GENSEC_FEATURE_SEAL);
 340         }
 341 }
 342
 343 static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode,
 344                                   char *buf, int length, void **private,
 345                                   unsigned int mux_id, void **private2)
 346 {
 347         DATA_BLOB in;
 348         DATA_BLOB out = data_blob(NULL, 0);
 349         char *out_base64 = NULL;
 350         const char *reply_arg = NULL;
 351         struct gensec_ntlm_state {
 352                 struct gensec_security *gensec_state;
 353                 const char *set_password;
 354         };
 355         struct gensec_ntlm_state *state;
 356         struct event_context *ev;
 357         struct messaging_context *msg;
 358
 359         NTSTATUS nt_status;
 360         BOOL first = False;
 361         const char *reply_code;
 362         struct cli_credentials *creds;
 363
 364         static char *want_feature_list = NULL;
 365         static DATA_BLOB session_key;
 366
 367         TALLOC_CTX *mem_ctx;
 368
 369         if (*private) {
 370                 state = *private;
 371         } else {
 372                 state = talloc_zero(NULL, struct gensec_ntlm_state);
 373                 if (!state) {
 374                         mux_printf(mux_id, "BH No Memory\n");
 375                         exit(1);
 376                 }
 377                 *private = state;
 378                 if (opt_password) {
 379                         state->set_password = opt_password;
 380                 }
 381         }
 382
 383         if (strlen(buf) < 2) {
 384                 DEBUG(1, ("query [%s] invalid", buf));
 385                 mux_printf(mux_id, "BH\n");
 386                 return;
 387         }
 388
 389         if (strlen(buf) > 3) {
 390                 if(strncmp(buf, "SF ", 3) == 0) {
 391                         DEBUG(10, ("Setting flags to negotiate\n"));
 392                         talloc_free(want_feature_list);
 393                         want_feature_list = talloc_strndup(state, buf+3, strlen(buf)-3);
 394                         mux_printf(mux_id, "OK\n");
 395                         return;
 396                 }
 397                 in = base64_decode_data_blob(NULL, buf + 3);
 398         } else {
 399                 in = data_blob(NULL, 0);
 400         }
 401
 402         if (strncmp(buf, "YR", 2) == 0) {
 403                 if (state->gensec_state) {
 404                         talloc_free(state->gensec_state);
 405                         state->gensec_state = NULL;
 406                 }
 407         } else if ( (strncmp(buf, "OK", 2) == 0)) {
 408                 /* Just return BH, like ntlm_auth from Samba 3 does. */
 409                 mux_printf(mux_id, "BH\n");
 410                 data_blob_free(&in);
 411                 return;
 412         } else if ( (strncmp(buf, "TT ", 3) != 0) &&
 413                     (strncmp(buf, "KK ", 3) != 0) &&
 414                     (strncmp(buf, "AF ", 3) != 0) &&
 415                     (strncmp(buf, "NA ", 3) != 0) &&
 416                     (strncmp(buf, "UG", 2) != 0) &&
 417                     (strncmp(buf, "PW ", 3) != 0) &&
 418                     (strncmp(buf, "GK", 2) != 0) &&
 419                     (strncmp(buf, "GF", 2) != 0)) {
 420                 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
 421                 mux_printf(mux_id, "BH\n");
 422                 data_blob_free(&in);
 423                 return;
 424         }
 425
 426         /* setup gensec */
 427         if (!(state->gensec_state)) {
 428                 switch (stdio_helper_mode) {
 429                 case GSS_SPNEGO_CLIENT:
 430                 case NTLMSSP_CLIENT_1:
 431                         /* setup the client side */
 432
 433                         nt_status = gensec_client_start(NULL, &state->gensec_state, NULL);
 434                         if (!NT_STATUS_IS_OK(nt_status)) {
 435                                 exit(1);
 436                         }
 437
 438                         break;
 439                 case GSS_SPNEGO_SERVER:
 440                 case SQUID_2_5_NTLMSSP:
 441                         ev = event_context_init(state);
 442                         if (!ev) {
 443                                 exit(1);
 444                         }
 445                         msg = messaging_client_init(state, ev);
 446                         if (!msg) {
 447                                 exit(1);
 448                         }
 449                         if (!NT_STATUS_IS_OK(gensec_server_start(state, ev, msg, &state->gensec_state))) {
 450                                 exit(1);
 451                         }
 452                         break;
 453                 default:
 454                         abort();
 455                 }
 456
 457                 creds = cli_credentials_init(state->gensec_state);
 458                 cli_credentials_set_conf(creds);
 459                 if (opt_username) {
 460                         cli_credentials_set_username(creds, opt_username, CRED_SPECIFIED);
 461                 }
 462                 if (opt_domain) {
 463                         cli_credentials_set_domain(creds, opt_domain, CRED_SPECIFIED);
 464                 }
 465                 if (state->set_password) {
 466                         cli_credentials_set_password(creds, state->set_password, CRED_SPECIFIED);
 467                 } else {
 468                         cli_credentials_set_password_callback(creds, get_password);
 469                         creds->priv_data = (void*)mux_id;
 470                 }
 471                 if (opt_workstation) {
 472                         cli_credentials_set_workstation(creds, opt_workstation, CRED_SPECIFIED);
 473                 }
 474
 475                 switch (stdio_helper_mode) {
 476                 case GSS_SPNEGO_SERVER:
 477                 case SQUID_2_5_NTLMSSP:
 478                         cli_credentials_set_machine_account(creds);
 479                         break;
 480                 default:
 481                         break;
 482                 }
 483
 484                 gensec_set_credentials(state->gensec_state, creds);
 485                 gensec_want_feature_list(state->gensec_state, want_feature_list);
 486
 487                 switch (stdio_helper_mode) {
 488                 case GSS_SPNEGO_CLIENT:
 489                 case GSS_SPNEGO_SERVER:
 490                         nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_SPNEGO);
 491                         if (!in.length) {
 492                                 first = True;
 493                         }
 494                         break;
 495                 case NTLMSSP_CLIENT_1:
 496                         if (!in.length) {
 497                                 first = True;
 498                         }
 499                         /* fall through */
 500                 case SQUID_2_5_NTLMSSP:
 501                         nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_NTLMSSP);
 502                         break;
 503                 default:
 504                         abort();
 505                 }
 506
 507                 if (!NT_STATUS_IS_OK(nt_status)) {
 508                         DEBUG(1, ("GENSEC mech failed to start: %s\n", nt_errstr(nt_status)));
 509                         mux_printf(mux_id, "BH\n");
 510                         return;
 511                 }
 512
 513         }
 514
 515         /* update */
 516         mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");
 517
 518         if (strncmp(buf, "PW ", 3) == 0) {
 519                 state->set_password = talloc_strndup(state,
 520                                                      (const char *)in.data,
 521                                                      in.length);
 522
 523                 cli_credentials_set_password(gensec_get_credentials(state->gensec_state),
 524                                              state->set_password,
 525                                              CRED_SPECIFIED);
 526                 mux_printf(mux_id, "OK\n");
 527                 data_blob_free(&in);
 528                 talloc_free(mem_ctx);
 529                 return;
 530         }
 531
 532         if (strncmp(buf, "UG", 2) == 0) {
 533                 int i;
 534                 char *grouplist = NULL;
 535                 struct auth_session_info *session_info;
 536
 537                 nt_status = gensec_session_info(state->gensec_state, &session_info);
 538                 if (!NT_STATUS_IS_OK(nt_status)) {
 539                         DEBUG(1, ("gensec_session_info failed: %s\n", nt_errstr(nt_status)));
 540                         mux_printf(mux_id, "BH %s\n", nt_errstr(nt_status));
 541                         data_blob_free(&in);
 542                         talloc_free(mem_ctx);
 543                         return;
 544                 }
 545
 546                 /* get the string onto the context */
 547                 grouplist = talloc_strdup(mem_ctx, "");
 548
 549                 for (i=0; i<session_info->security_token->num_sids; i++) {
 550                         struct security_token *token = session_info->security_token;
 551                         const char *sidstr = dom_sid_string(session_info,
 552                                                             token->sids[i]);
 553                         grouplist = talloc_asprintf_append(grouplist, "%s,", sidstr);
 554                 }
 555
 556                 mux_printf(mux_id, "GL %s\n", grouplist);
 557                 talloc_free(session_info);
 558                 data_blob_free(&in);
 559                 talloc_free(mem_ctx);
 560                 return;
 561         }
 562
 563         if (strncmp(buf, "GK", 2) == 0) {
 564                 char *base64_key;
 565                 DEBUG(10, ("Requested session key\n"));
 566                 nt_status = gensec_session_key(state->gensec_state, &session_key);
 567                 if(!NT_STATUS_IS_OK(nt_status)) {
 568                         DEBUG(1, ("gensec_session_key failed: %s\n", nt_errstr(nt_status)));
 569                         mux_printf(mux_id, "BH No session key\n");
 570                         talloc_free(mem_ctx);
 571                         return;
 572                 } else {
 573                         base64_key = base64_encode_data_blob(state, session_key);
 574                         mux_printf(mux_id, "GK %s\n", base64_key);
 575                         talloc_free(base64_key);
 576                 }
 577                 talloc_free(mem_ctx);
 578                 return;
 579         }
 580
 581         if (strncmp(buf, "GF", 2) == 0) {
 582                 struct gensec_ntlmssp_state *gensec_ntlmssp_state;
 583                 uint32_t neg_flags;
 584
 585                 gensec_ntlmssp_state = talloc_get_type(state->gensec_state->private_data,
 586                                 struct gensec_ntlmssp_state);
 587                 neg_flags = gensec_ntlmssp_state->neg_flags;
 588
 589                 DEBUG(10, ("Requested negotiated feature flags\n"));
 590                 mux_printf(mux_id, "GF 0x%08x\n", neg_flags);
 591                 return;
 592         }
 593
 594         nt_status = gensec_update(state->gensec_state, mem_ctx, in, &out);
 595
 596         /* don't leak 'bad password'/'no such user' info to the network client */
 597         nt_status = auth_nt_status_squash(nt_status);
 598
 599         if (out.length) {
 600                 out_base64 = base64_encode_data_blob(mem_ctx, out);
 601         } else {
 602                 out_base64 = NULL;
 603         }
 604
 605         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 606                 reply_arg = "*";
 607                 if (first) {
 608                         reply_code = "YR";
 609                 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
 610                         reply_code = "KK";
 611                 } else if (state->gensec_state->gensec_role == GENSEC_SERVER) {
 612                         reply_code = "TT";
 613                 } else {
 614                         abort();
 615                 }
 616
 617
 618         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
 619                 reply_code = "BH";
 620                 reply_arg = nt_errstr(nt_status);
 621                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 622         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
 623                 reply_code = "BH";
 624                 reply_arg = nt_errstr(nt_status);
 625                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 626         } else if (!NT_STATUS_IS_OK(nt_status)) {
 627                 reply_code = "NA";
 628                 reply_arg = nt_errstr(nt_status);
 629                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 630         } else if /* OK */ (state->gensec_state->gensec_role == GENSEC_SERVER) {
 631                 struct auth_session_info *session_info;
 632
 633                 nt_status = gensec_session_info(state->gensec_state, &session_info);
 634                 if (!NT_STATUS_IS_OK(nt_status)) {
 635                         reply_code = "BH";
 636                         reply_arg = nt_errstr(nt_status);
 637                         DEBUG(1, ("GENSEC failed to retreive the session info: %s\n", nt_errstr(nt_status)));
 638                 } else {
 639
 640                         reply_code = "AF";
 641                         reply_arg = talloc_asprintf(state->gensec_state,
 642                                                     "%s%s%s", session_info->server_info->domain_name,
 643                                                     lp_winbind_separator(), session_info->server_info->account_name);
 644                         talloc_free(session_info);
 645                 }
 646         } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
 647                 reply_code = "AF";
 648                 reply_arg = out_base64;
 649         } else {
 650                 abort();
 651         }
 652
 653         switch (stdio_helper_mode) {
 654         case GSS_SPNEGO_SERVER:
 655                 mux_printf(mux_id, "%s %s %s\n", reply_code,
 656                           out_base64 ? out_base64 : "*",
 657                           reply_arg ? reply_arg : "*");
 658                 break;
 659         default:
 660                 if (out_base64) {
 661                         mux_printf(mux_id, "%s %s\n", reply_code, out_base64);
 662                 } else if (reply_arg) {
 663                         mux_printf(mux_id, "%s %s\n", reply_code, reply_arg);
 664                 } else {
 665                         mux_printf(mux_id, "%s\n", reply_code);
 666                 }
 667         }
 668
 669         talloc_free(mem_ctx);
 670         return;
 671 }
 672
 673 static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
 674                                          char *buf, int length, void **private,
 675                                          unsigned int mux_id, void **private2)
 676 {
 677         char *request, *parameter;
 678         static DATA_BLOB challenge;
 679         static DATA_BLOB lm_response;
 680         static DATA_BLOB nt_response;
 681         static char *full_username;
 682         static char *username;
 683         static char *domain;
 684         static char *plaintext_password;
 685         static BOOL ntlm_server_1_user_session_key;
 686         static BOOL ntlm_server_1_lm_session_key;
 687
 688         if (strequal(buf, ".")) {
 689                 if (!full_username && !username) {
 690                         mux_printf(mux_id, "Error: No username supplied!\n");
 691                 } else if (plaintext_password) {
 692                         /* handle this request as plaintext */
 693                         if (!full_username) {
 694                                 if (asprintf(&full_username, "%s%c%s", domain, *lp_winbind_separator(), username) == -1) {
 695                                         mux_printf(mux_id, "Error: Out of memory in asprintf!\n.\n");
 696                                         return;
 697                                 }
 698                         }
 699                         if (check_plaintext_auth(full_username, plaintext_password, False)) {
 700                                 mux_printf(mux_id, "Authenticated: Yes\n");
 701                         } else {
 702                                 mux_printf(mux_id, "Authenticated: No\n");
 703                         }
 704                 } else if (!lm_response.data && !nt_response.data) {
 705                         mux_printf(mux_id, "Error: No password supplied!\n");
 706                 } else if (!challenge.data) {
 707                         mux_printf(mux_id, "Error: No lanman-challenge supplied!\n");
 708                 } else {
 709                         char *error_string = NULL;
 710                         DATA_BLOB lm_key;
 711                         DATA_BLOB user_session_key;
 712                         uint32_t flags = 0;
 713
 714                         if (full_username && !username) {
 715                                 fstring fstr_user;
 716                                 fstring fstr_domain;
 717
 718                                 if (!parse_ntlm_auth_domain_user(full_username, fstr_user, fstr_domain)) {
 719                                         /* username might be 'tainted', don't print into our new-line deleimianted stream */
 720                                         mux_printf(mux_id, "Error: Could not parse into domain and username\n");
 721                                 }
 722                                 SAFE_FREE(username);
 723                                 SAFE_FREE(domain);
 724                                 username = smb_xstrdup(fstr_user);
 725                                 domain = smb_xstrdup(fstr_domain);
 726                         }
 727
 728                         if (!domain) {
 729                                 domain = smb_xstrdup(lp_workgroup());
 730                         }
 731
 732                         if (ntlm_server_1_lm_session_key)
 733                                 flags |= NTLM_AUTH_FLAG_LMKEY;
 734
 735                         if (ntlm_server_1_user_session_key)
 736                                 flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY;
 737
 738                         if (!NT_STATUS_IS_OK(
 739                                     local_pw_check_specified(username,
 740                                                               domain,
 741                                                               lp_netbios_name(),
 742                                                               &challenge,
 743                                                               &lm_response,
 744                                                               &nt_response,
 745                                                               flags,
 746                                                               &lm_key,
 747                                                               &user_session_key,
 748                                                               &error_string,
 749                                                               NULL))) {
 750
 751                                 mux_printf(mux_id, "Authenticated: No\n");
 752                                 mux_printf(mux_id, "Authentication-Error: %s\n.\n", error_string);
 753                                 SAFE_FREE(error_string);
 754                         } else {
 755                                 static char zeros[16];
 756                                 char *hex_lm_key;
 757                                 char *hex_user_session_key;
 758
 759                                 mux_printf(mux_id, "Authenticated: Yes\n");
 760
 761                                 if (ntlm_server_1_lm_session_key
 762                                     && lm_key.length
 763                                     && (memcmp(zeros, lm_key.data,
 764                                                                 lm_key.length) != 0)) {
 765                                         hex_encode(lm_key.data,
 766                                                    lm_key.length,
 767                                                    &hex_lm_key);
 768                                         mux_printf(mux_id, "LANMAN-Session-Key: %s\n", hex_lm_key);
 769                                         SAFE_FREE(hex_lm_key);
 770                                 }
 771
 772                                 if (ntlm_server_1_user_session_key
 773                                     && user_session_key.length
 774                                     && (memcmp(zeros, user_session_key.data,
 775                                                user_session_key.length) != 0)) {
 776                                         hex_encode(user_session_key.data,
 777                                                    user_session_key.length,
 778                                                    &hex_user_session_key);
 779                                         mux_printf(mux_id, "User-Session-Key: %s\n", hex_user_session_key);
 780                                         SAFE_FREE(hex_user_session_key);
 781                                 }
 782                         }
 783                 }
 784                 /* clear out the state */
 785                 challenge = data_blob(NULL, 0);
 786                 nt_response = data_blob(NULL, 0);
 787                 lm_response = data_blob(NULL, 0);
 788                 SAFE_FREE(full_username);
 789                 SAFE_FREE(username);
 790                 SAFE_FREE(domain);
 791                 SAFE_FREE(plaintext_password);
 792                 ntlm_server_1_user_session_key = False;
 793                 ntlm_server_1_lm_session_key = False;
 794                 mux_printf(mux_id, ".\n");
 795
 796                 return;
 797         }
 798
 799         request = buf;
 800
 801         /* Indicates a base64 encoded structure */
 802         parameter = strstr(request, ":: ");
 803         if (!parameter) {
 804                 parameter = strstr(request, ": ");
 805
 806                 if (!parameter) {
 807                         DEBUG(0, ("Parameter not found!\n"));
 808                         mux_printf(mux_id, "Error: Parameter not found!\n.\n");
 809                         return;
 810                 }
 811
 812                 parameter[0] ='\0';
 813                 parameter++;
 814                 parameter[0] ='\0';
 815                 parameter++;
 816
 817         } else {
 818                 parameter[0] ='\0';
 819                 parameter++;
 820                 parameter[0] ='\0';
 821                 parameter++;
 822                 parameter[0] ='\0';
 823                 parameter++;
 824
 825                 base64_decode_inplace(parameter);
 826         }
 827
 828         if (strequal(request, "LANMAN-Challenge")) {
 829                 challenge = strhex_to_data_blob(parameter);
 830                 if (challenge.length != 8) {
 831                         mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
 832                                   parameter,
 833                                   (int)challenge.length);
 834                         challenge = data_blob(NULL, 0);
 835                 }
 836         } else if (strequal(request, "NT-Response")) {
 837                 nt_response = strhex_to_data_blob(parameter);
 838                 if (nt_response.length < 24) {
 839                         mux_printf(mux_id, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
 840                                   parameter,
 841                                   (int)nt_response.length);
 842                         nt_response = data_blob(NULL, 0);
 843                 }
 844         } else if (strequal(request, "LANMAN-Response")) {
 845                 lm_response = strhex_to_data_blob(parameter);
 846                 if (lm_response.length != 24) {
 847                         mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
 848                                   parameter,
 849                                   (int)lm_response.length);
 850                         lm_response = data_blob(NULL, 0);
 851                 }
 852         } else if (strequal(request, "Password")) {
 853                 plaintext_password = smb_xstrdup(parameter);
 854         } else if (strequal(request, "NT-Domain")) {
 855                 domain = smb_xstrdup(parameter);
 856         } else if (strequal(request, "Username")) {
 857                 username = smb_xstrdup(parameter);
 858         } else if (strequal(request, "Full-Username")) {
 859                 full_username = smb_xstrdup(parameter);
 860         } else if (strequal(request, "Request-User-Session-Key")) {
 861                 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
 862         } else if (strequal(request, "Request-LanMan-Session-Key")) {
 863                 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
 864         } else {
 865                 mux_printf(mux_id, "Error: Unknown request %s\n.\n", request);
 866         }
 867 }
 868
 869 static void manage_squid_request(enum stdio_helper_mode helper_mode,
 870                                  stdio_helper_function fn, void **private2)
 871 {
 872         char buf[SQUID_BUFFER_SIZE+1];
 873         unsigned int mux_id = 0;
 874         int length;
 875         char *c;
 876         static BOOL err;
 877         struct mux_private {
 878                 unsigned int max_mux;
 879                 void **private_pointers;
 880         };
 881
 882         static struct mux_private *mux_private;
 883         static void *normal_private;
 884         void **private;
 885
 886         /* this is not a typo - x_fgets doesn't work too well under squid */
 887         if (fgets(buf, sizeof(buf)-1, stdin) == NULL) {
 888                 if (ferror(stdin)) {
 889                         DEBUG(1, ("fgets() failed! dying..... errno=%d (%s)\n", ferror(stdin),
 890                                   strerror(ferror(stdin))));
 891
 892                         exit(1);    /* BIIG buffer */
 893                 }
 894                 exit(0);
 895         }
 896
 897         c=memchr(buf,'\n',sizeof(buf)-1);
 898         if (c) {
 899                 *c = '\0';
 900                 length = c-buf;
 901         } else {
 902                 err = 1;
 903                 return;
 904         }
 905         if (err) {
 906                 DEBUG(0, ("Oversized message\n"));
 907                 x_fprintf(x_stdout, "ERR\n");
 908                 err = 0;
 909                 return;
 910         }
 911
 912         DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
 913
 914         if (buf[0] == '\0') {
 915                 DEBUG(0, ("Invalid Request (empty)\n"));
 916                 x_fprintf(x_stdout, "ERR\n");
 917                 return;
 918         }
 919
 920         if (opt_multiplex) {
 921                 if (sscanf(buf, "%u ", &mux_id) != 1) {
 922                         DEBUG(0, ("Invalid Request - no multiplex id\n"));
 923                         x_fprintf(x_stdout, "ERR\n");
 924                         return;
 925                 }
 926                 if (!mux_private) {
 927                         mux_private = talloc(NULL, struct mux_private);
 928                         mux_private->max_mux = 0;
 929                         mux_private->private_pointers = NULL;
 930                 }
 931
 932                 c=strchr(buf,' ');
 933                 if (!c) {
 934                         DEBUG(0, ("Invalid Request - no data after multiplex id\n"));
 935                         x_fprintf(x_stdout, "ERR\n");
 936                         return;
 937                 }
 938                 c++;
 939                 if (mux_id >= mux_private->max_mux) {
 940                         unsigned int prev_max = mux_private->max_mux;
 941                         mux_private->max_mux = mux_id + 1;
 942                         mux_private->private_pointers
 943                                 = talloc_realloc(mux_private,
 944                                                    mux_private->private_pointers,
 945                                                    void *, mux_private->max_mux);
 946                         memset(&mux_private->private_pointers[prev_max], '\0',
 947                                (sizeof(*mux_private->private_pointers) * (mux_private->max_mux - prev_max)));
 948                 };
 949
 950                 private = &mux_private->private_pointers[mux_id];
 951         } else {
 952                 c = buf;
 953                 private = &normal_private;
 954         }
 955
 956         fn(helper_mode, c, length, private, mux_id, private2);
 957 }
 958
 959 static void squid_stream(enum stdio_helper_mode stdio_mode,
 960                          stdio_helper_function fn) {
 961         /* initialize FDescs */
 962         x_setbuf(x_stdout, NULL);
 963         x_setbuf(x_stderr, NULL);
 964         while(1) {
 965                 manage_squid_request(stdio_mode, fn, NULL);
 966         }
 967 }
 968
 969
 970 /* Main program */
 971
 972 enum {
 973         OPT_USERNAME = 1000,
 974         OPT_DOMAIN,
 975         OPT_WORKSTATION,
 976         OPT_CHALLENGE,
 977         OPT_RESPONSE,
 978         OPT_LM,
 979         OPT_NT,
 980         OPT_PASSWORD,
 981         OPT_LM_KEY,
 982         OPT_USER_SESSION_KEY,
 983         OPT_DIAGNOSTICS,
 984         OPT_REQUIRE_MEMBERSHIP,
 985         OPT_MULTIPLEX,
 986         OPT_USE_CACHED_CREDS,
 987 };
 988
 989 int main(int argc, const char **argv)
 990 {
 991         static const char *helper_protocol;
 992         int opt;
 993
 994         poptContext pc;
 995
 996         /* NOTE: DO NOT change this interface without considering the implications!
 997            This is an external interface, which other programs will use to interact
 998            with this helper.
 999         */
1000
1001         /* We do not use single-letter command abbreviations, because they harm future
1002            interface stability. */
1003
1004         struct poptOption long_options[] = {
1005                 POPT_AUTOHELP
1006                 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
1007                 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
1008                 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
1009                 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"},
1010                 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
1011                 { "multiplex", 0, POPT_ARG_NONE, &opt_multiplex, OPT_MULTIPLEX, "Multiplex Mode"},
1012                 { "use-cached-creds", 0, POPT_ARG_NONE, &use_cached_creds, OPT_USE_CACHED_CREDS, "silently ignored for compatibility reasons"},
1013                 POPT_COMMON_SAMBA
1014                 POPT_COMMON_VERSION
1015                 { NULL }
1016         };
1017
1018         /* Samba client initialisation */
1019
1020         setup_logging(NULL, DEBUG_STDERR);
1021
1022         /* Parse options */
1023
1024         pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
1025
1026         /* Parse command line options */
1027
1028         if (argc == 1) {
1029                 poptPrintHelp(pc, stderr, 0);
1030                 return 1;
1031         }
1032
1033         pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
1034                             POPT_CONTEXT_KEEP_FIRST);
1035
1036         while((opt = poptGetNextOpt(pc)) != -1) {
1037                 if (opt < -1) {
1038                         break;
1039                 }
1040         }
1041         if (opt < -1) {
1042                 fprintf(stderr, "%s: %s\n",
1043                         poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1044                         poptStrerror(opt));
1045                 return 1;
1046         }
1047
1048         gensec_init();
1049
1050         if (opt_domain == NULL) {
1051                 opt_domain = lp_workgroup();
1052         }
1053
1054         if (helper_protocol) {
1055                 int i;
1056                 for (i=0; i<NUM_HELPER_MODES; i++) {
1057                         if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
1058                                 squid_stream(stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
1059                                 exit(0);
1060                         }
1061                 }
1062                 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
1063
1064                 for (i=0; i<NUM_HELPER_MODES; i++) {
1065                         x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
1066                 }
1067
1068                 exit(1);
1069         }
1070
1071         if (!opt_username) {
1072                 x_fprintf(x_stderr, "username must be specified!\n\n");
1073                 poptPrintHelp(pc, stderr, 0);
1074                 exit(1);
1075         }
1076
1077         if (opt_workstation == NULL) {
1078                 opt_workstation = lp_netbios_name();
1079         }
1080
1081         if (!opt_password) {
1082                 opt_password = getpass("password: ");
1083         }
1084
1085         {
1086                 char *user;
1087
1088                 asprintf(&user, "%s%c%s", opt_domain, *lp_winbind_separator(), opt_username);
1089                 if (!check_plaintext_auth(user, opt_password, True)) {
1090                         return 1;
1091                 }
1092         }
1093
1094         /* Exit code */
1095
1096         poptFreeContext(pc);
1097         return 0;
1098 }