source4/utils/ntlm_auth.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind status program.
   5
   6    Copyright (C) Tim Potter      2000-2003
   7    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003-2004
   8    Copyright (C) Francesco Chemolli <kinkie@kame.usr.dsi.unimi.it> 2000
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "system/filesys.h"
  26 #include "lib/cmdline/popt_common.h"
  27 #include <ldb.h>
  28 #include "auth/credentials/credentials.h"
  29 #include "auth/gensec/gensec.h"
  30 #include "auth/auth.h"
  31 #include "librpc/gen_ndr/ndr_netlogon.h"
  32 #include "auth/auth_sam.h"
  33 #include "libcli/auth/libcli_auth.h"
  34 #include "libcli/security/security.h"
  35 #include "lib/events/events.h"
  36 #include "lib/messaging/messaging.h"
  37 #include "lib/messaging/irpc.h"
  38 #include "auth/ntlmssp/ntlmssp.h"
  39 #include "param/param.h"
  40
  41 #define INITIAL_BUFFER_SIZE 300
  42 #define MAX_BUFFER_SIZE 63000
  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                                       struct loadparm_context *lp_ctx,
  61                                       char *buf, int length, void **private1,
  62                                       unsigned int mux_id, void **private2);
  63
  64 static void manage_squid_basic_request (enum stdio_helper_mode stdio_helper_mode,
  65                                         struct loadparm_context *lp_ctx,
  66                                         char *buf, int length, void **private1,
  67                                         unsigned int mux_id, void **private2);
  68
  69 static void manage_gensec_request (enum stdio_helper_mode stdio_helper_mode,
  70                                    struct loadparm_context *lp_ctx,
  71                                    char *buf, int length, void **private1,
  72                                    unsigned int mux_id, void **private2);
  73
  74 static void manage_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode,
  75                                           struct loadparm_context *lp_ctx,
  76                                           char *buf, int length, void **private1,
  77                                           unsigned int mux_id, void **private2);
  78
  79 static void manage_squid_request(struct loadparm_context *lp_ctx,
  80                                  enum stdio_helper_mode helper_mode,
  81                                  stdio_helper_function fn, void **private2);
  82
  83 static const struct {
  84         enum stdio_helper_mode mode;
  85         const char *name;
  86         stdio_helper_function fn;
  87 } stdio_helper_protocols[] = {
  88         { SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
  89         { SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
  90         { SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request},
  91         { GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request},
  92         { GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request},
  93         { NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request},
  94         { NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
  95         { NUM_HELPER_MODES, NULL, NULL}
  96 };
  97
  98 extern int winbindd_fd;
  99
 100 static const char *opt_username;
 101 static const char *opt_domain;
 102 static const char *opt_workstation;
 103 static const char *opt_password;
 104 static int opt_multiplex;
 105 static int use_cached_creds;
 106
 107
 108 static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
 109
 110 static void mux_printf(unsigned int mux_id, const char *format, ...)
 111 {
 112         va_list ap;
 113
 114         if (opt_multiplex) {
 115                 x_fprintf(x_stdout, "%d ", mux_id);
 116         }
 117
 118         va_start(ap, format);
 119         x_vfprintf(x_stdout, format, ap);
 120         va_end(ap);
 121 }
 122
 123
 124
 125 /* Copy of parse_domain_user from winbindd_util.c.  Parse a string of the
 126    form DOMAIN/user into a domain and a user */
 127
 128 static bool parse_ntlm_auth_domain_user(const char *domuser, char **domain,
 129                                                                                 char **user, char winbind_separator)
 130 {
 131
 132         char *p = strchr(domuser, winbind_separator);
 133
 134         if (!p) {
 135                 return false;
 136         }
 137
 138         *user = smb_xstrdup(p+1);
 139         *domain = smb_xstrdup(domuser);
 140         (*domain)[PTR_DIFF(p, domuser)] = 0;
 141
 142         return true;
 143 }
 144
 145
 146 /* Authenticate a user with a plaintext password */
 147
 148 static bool check_plaintext_auth(const char *user, const char *pass,
 149                                  bool stdout_diagnostics)
 150 {
 151         return (strcmp(pass, opt_password) == 0);
 152 }
 153
 154 /* authenticate a user with an encrypted username/password */
 155
 156 static NTSTATUS local_pw_check_specified(struct loadparm_context *lp_ctx,
 157                                          const char *username,
 158                                          const char *domain,
 159                                          const char *workstation,
 160                                          const DATA_BLOB *challenge,
 161                                          const DATA_BLOB *lm_response,
 162                                          const DATA_BLOB *nt_response,
 163                                          uint32_t flags,
 164                                          DATA_BLOB *lm_session_key,
 165                                          DATA_BLOB *user_session_key,
 166                                          char **error_string,
 167                                          char **unix_name)
 168 {
 169         NTSTATUS nt_status;
 170         struct samr_Password lm_pw, nt_pw;
 171         struct samr_Password *lm_pwd, *nt_pwd;
 172         TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
 173         if (!mem_ctx) {
 174                 nt_status = NT_STATUS_NO_MEMORY;
 175         } else {
 176
 177                 E_md4hash(opt_password, nt_pw.hash);
 178                 if (E_deshash(opt_password, lm_pw.hash)) {
 179                         lm_pwd = &lm_pw;
 180                 } else {
 181                         lm_pwd = NULL;
 182                 }
 183                 nt_pwd = &nt_pw;
 184
 185
 186                 nt_status = ntlm_password_check(mem_ctx,
 187                                                 lpcfg_lanman_auth(lp_ctx),
 188                                                 lpcfg_ntlm_auth(lp_ctx),
 189                                                 MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT |
 190                                                 MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
 191                                                 challenge,
 192                                                 lm_response,
 193                                                 nt_response,
 194                                                 username,
 195                                                 username,
 196                                                 domain,
 197                                                 lm_pwd, nt_pwd, user_session_key, lm_session_key);
 198
 199                 if (NT_STATUS_IS_OK(nt_status)) {
 200                         if (unix_name) {
 201                                 if (asprintf(unix_name, "%s%c%s", domain,
 202                                              *lpcfg_winbind_separator(lp_ctx),
 203                                              username) < 0) {
 204                                         nt_status = NT_STATUS_NO_MEMORY;
 205                                 }
 206                         }
 207                 } else {
 208                         DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
 209                                   domain, username, workstation,
 210                                   nt_errstr(nt_status)));
 211                 }
 212                 talloc_free(mem_ctx);
 213         }
 214         if (error_string) {
 215                 *error_string = strdup(nt_errstr(nt_status));
 216         }
 217         return nt_status;
 218
 219
 220 }
 221
 222 static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode,
 223                                        struct loadparm_context *lp_ctx,
 224                                        char *buf, int length, void **private1,
 225                                        unsigned int mux_id, void **private2)
 226 {
 227         char *user, *pass;
 228         user=buf;
 229
 230         pass = memchr(buf, ' ', length);
 231         if (!pass) {
 232                 DEBUG(2, ("Password not found. Denying access\n"));
 233                 mux_printf(mux_id, "ERR\n");
 234                 return;
 235         }
 236         *pass='\0';
 237         pass++;
 238
 239         if (stdio_helper_mode == SQUID_2_5_BASIC) {
 240                 rfc1738_unescape(user);
 241                 rfc1738_unescape(pass);
 242         }
 243
 244         if (check_plaintext_auth(user, pass, false)) {
 245                 mux_printf(mux_id, "OK\n");
 246         } else {
 247                 mux_printf(mux_id, "ERR\n");
 248         }
 249 }
 250
 251 /* This is a bit hairy, but the basic idea is to do a password callback
 252    to the calling application.  The callback comes from within gensec */
 253
 254 static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode,
 255                                          struct loadparm_context *lp_ctx,
 256                                          char *buf, int length, void **private1,
 257                                          unsigned int mux_id, void **password)
 258 {
 259         DATA_BLOB in;
 260         if (strlen(buf) < 2) {
 261                 DEBUG(1, ("query [%s] invalid", buf));
 262                 mux_printf(mux_id, "BH Query invalid\n");
 263                 return;
 264         }
 265
 266         if (strlen(buf) > 3) {
 267                 in = base64_decode_data_blob(buf + 3);
 268         } else {
 269                 in = data_blob(NULL, 0);
 270         }
 271
 272         if (strncmp(buf, "PW ", 3) == 0) {
 273
 274                 *password = talloc_strndup(*private1 /* hopefully the right gensec context, useful to use for talloc */,
 275                                            (const char *)in.data, in.length);
 276
 277                 if (*password == NULL) {
 278                         DEBUG(1, ("Out of memory\n"));
 279                         mux_printf(mux_id, "BH Out of memory\n");
 280                         data_blob_free(&in);
 281                         return;
 282                 }
 283
 284                 mux_printf(mux_id, "OK\n");
 285                 data_blob_free(&in);
 286                 return;
 287         }
 288         DEBUG(1, ("Asked for (and expected) a password\n"));
 289         mux_printf(mux_id, "BH Expected a password\n");
 290         data_blob_free(&in);
 291 }
 292
 293 /**
 294  * Callback for password credentials.  This is not async, and when
 295  * GENSEC and the credentials code is made async, it will look rather
 296  * different.
 297  */
 298
 299 static const char *get_password(struct cli_credentials *credentials)
 300 {
 301         char *password = NULL;
 302
 303         /* Ask for a password */
 304         mux_printf((unsigned int)(uintptr_t)credentials->priv_data, "PW\n");
 305         credentials->priv_data = NULL;
 306
 307         manage_squid_request(cmdline_lp_ctx, NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, (void **)&password);
 308         return password;
 309 }
 310
 311 /**
 312  Check if a string is part of a list.
 313 **/
 314 static bool in_list(const char *s, const char *list, bool casesensitive)
 315 {
 316         char *tok;
 317         size_t tok_len = 1024;
 318         const char *p=list;
 319
 320         if (!list)
 321                 return false;
 322
 323         tok = (char *)malloc(tok_len);
 324         if (!tok) {
 325                 return false;
 326         }
 327
 328         while (next_token(&p, tok, LIST_SEP, tok_len)) {
 329                 if ((casesensitive?strcmp:strcasecmp_m)(tok,s) == 0) {
 330                         free(tok);
 331                         return true;
 332                 }
 333         }
 334         free(tok);
 335         return false;
 336 }
 337
 338 static void gensec_want_feature_list(struct gensec_security *state, char* feature_list)
 339 {
 340         if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list, true)) {
 341                 DEBUG(10, ("want GENSEC_FEATURE_SESSION_KEY\n"));
 342                 gensec_want_feature(state, GENSEC_FEATURE_SESSION_KEY);
 343         }
 344         if (in_list("NTLMSSP_FEATURE_SIGN", feature_list, true)) {
 345                 DEBUG(10, ("want GENSEC_FEATURE_SIGN\n"));
 346                 gensec_want_feature(state, GENSEC_FEATURE_SIGN);
 347         }
 348         if (in_list("NTLMSSP_FEATURE_SEAL", feature_list, true)) {
 349                 DEBUG(10, ("want GENSEC_FEATURE_SEAL\n"));
 350                 gensec_want_feature(state, GENSEC_FEATURE_SEAL);
 351         }
 352 }
 353
 354 static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode,
 355                                   struct loadparm_context *lp_ctx,
 356                                   char *buf, int length, void **private1,
 357                                   unsigned int mux_id, void **private2)
 358 {
 359         DATA_BLOB in;
 360         DATA_BLOB out = data_blob(NULL, 0);
 361         char *out_base64 = NULL;
 362         const char *reply_arg = NULL;
 363         struct gensec_ntlm_state {
 364                 struct gensec_security *gensec_state;
 365                 const char *set_password;
 366         };
 367         struct gensec_ntlm_state *state;
 368         struct tevent_context *ev;
 369         struct imessaging_context *msg;
 370
 371         NTSTATUS nt_status;
 372         bool first = false;
 373         const char *reply_code;
 374         struct cli_credentials *creds;
 375
 376         static char *want_feature_list = NULL;
 377         static DATA_BLOB session_key;
 378
 379         TALLOC_CTX *mem_ctx;
 380
 381         if (*private1) {
 382                 state = (struct gensec_ntlm_state *)*private1;
 383         } else {
 384                 state = talloc_zero(NULL, struct gensec_ntlm_state);
 385                 if (!state) {
 386                         mux_printf(mux_id, "BH No Memory\n");
 387                         exit(1);
 388                 }
 389                 *private1 = state;
 390                 if (opt_password) {
 391                         state->set_password = opt_password;
 392                 }
 393         }
 394
 395         if (strlen(buf) < 2) {
 396                 DEBUG(1, ("query [%s] invalid", buf));
 397                 mux_printf(mux_id, "BH Query invalid\n");
 398                 return;
 399         }
 400
 401         if (strlen(buf) > 3) {
 402                 if(strncmp(buf, "SF ", 3) == 0) {
 403                         DEBUG(10, ("Setting flags to negotiate\n"));
 404                         talloc_free(want_feature_list);
 405                         want_feature_list = talloc_strndup(state, buf+3, strlen(buf)-3);
 406                         mux_printf(mux_id, "OK\n");
 407                         return;
 408                 }
 409                 in = base64_decode_data_blob(buf + 3);
 410         } else {
 411                 in = data_blob(NULL, 0);
 412         }
 413
 414         if (strncmp(buf, "YR", 2) == 0) {
 415                 if (state->gensec_state) {
 416                         talloc_free(state->gensec_state);
 417                         state->gensec_state = NULL;
 418                 }
 419         } else if ( (strncmp(buf, "OK", 2) == 0)) {
 420                 /* Just return BH, like ntlm_auth from Samba 3 does. */
 421                 mux_printf(mux_id, "BH Command expected\n");
 422                 data_blob_free(&in);
 423                 return;
 424         } else if ( (strncmp(buf, "TT ", 3) != 0) &&
 425                     (strncmp(buf, "KK ", 3) != 0) &&
 426                     (strncmp(buf, "AF ", 3) != 0) &&
 427                     (strncmp(buf, "NA ", 3) != 0) &&
 428                     (strncmp(buf, "UG", 2) != 0) &&
 429                     (strncmp(buf, "PW ", 3) != 0) &&
 430                     (strncmp(buf, "GK", 2) != 0) &&
 431                     (strncmp(buf, "GF", 2) != 0)) {
 432                 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
 433                 mux_printf(mux_id, "BH SPNEGO request invalid\n");
 434                 data_blob_free(&in);
 435                 return;
 436         }
 437
 438         ev = s4_event_context_init(state);
 439         if (!ev) {
 440                 exit(1);
 441         }
 442
 443         mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");
 444
 445         /* setup gensec */
 446         if (!(state->gensec_state)) {
 447                 switch (stdio_helper_mode) {
 448                 case GSS_SPNEGO_CLIENT:
 449                 case NTLMSSP_CLIENT_1:
 450                         /* setup the client side */
 451
 452                         nt_status = gensec_client_start(NULL, &state->gensec_state,
 453                                                         lpcfg_gensec_settings(NULL, lp_ctx));
 454                         if (!NT_STATUS_IS_OK(nt_status)) {
 455                                 talloc_free(mem_ctx);
 456                                 exit(1);
 457                         }
 458
 459                         break;
 460                 case GSS_SPNEGO_SERVER:
 461                 case SQUID_2_5_NTLMSSP:
 462                 {
 463                         const char *winbind_method[] = { "winbind", NULL };
 464                         struct auth4_context *auth_context;
 465
 466                         msg = imessaging_client_init(state, lp_ctx, ev);
 467                         if (!msg) {
 468                                 talloc_free(mem_ctx);
 469                                 exit(1);
 470                         }
 471                         nt_status = auth_context_create_methods(mem_ctx,
 472                                                                 winbind_method,
 473                                                                 ev,
 474                                                                 msg,
 475                                                                 lp_ctx,
 476                                                                 NULL,
 477                                                                 &auth_context);
 478
 479                         if (!NT_STATUS_IS_OK(nt_status)) {
 480                                 talloc_free(mem_ctx);
 481                                 exit(1);
 482                         }
 483
 484                         if (!NT_STATUS_IS_OK(gensec_server_start(state,
 485                                                                  lpcfg_gensec_settings(state, lp_ctx),
 486                                                                  auth_context, &state->gensec_state))) {
 487                                 talloc_free(mem_ctx);
 488                                 exit(1);
 489                         }
 490                         break;
 491                 }
 492                 default:
 493                         talloc_free(mem_ctx);
 494                         abort();
 495                 }
 496
 497                 creds = cli_credentials_init(state->gensec_state);
 498                 cli_credentials_set_conf(creds, lp_ctx);
 499                 if (opt_username) {
 500                         cli_credentials_set_username(creds, opt_username, CRED_SPECIFIED);
 501                 }
 502                 if (opt_domain) {
 503                         cli_credentials_set_domain(creds, opt_domain, CRED_SPECIFIED);
 504                 }
 505                 if (state->set_password) {
 506                         cli_credentials_set_password(creds, state->set_password, CRED_SPECIFIED);
 507                 } else {
 508                         cli_credentials_set_password_callback(creds, get_password);
 509                         creds->priv_data = (void*)(uintptr_t)mux_id;
 510                 }
 511                 if (opt_workstation) {
 512                         cli_credentials_set_workstation(creds, opt_workstation, CRED_SPECIFIED);
 513                 }
 514
 515                 switch (stdio_helper_mode) {
 516                 case GSS_SPNEGO_SERVER:
 517                 case SQUID_2_5_NTLMSSP:
 518                         cli_credentials_set_machine_account(creds, lp_ctx);
 519                         break;
 520                 default:
 521                         break;
 522                 }
 523
 524                 gensec_set_credentials(state->gensec_state, creds);
 525                 gensec_want_feature_list(state->gensec_state, want_feature_list);
 526
 527                 switch (stdio_helper_mode) {
 528                 case GSS_SPNEGO_CLIENT:
 529                 case GSS_SPNEGO_SERVER:
 530                         nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_SPNEGO);
 531                         if (!in.length) {
 532                                 first = true;
 533                         }
 534                         break;
 535                 case NTLMSSP_CLIENT_1:
 536                         if (!in.length) {
 537                                 first = true;
 538                         }
 539                         /* fall through */
 540                 case SQUID_2_5_NTLMSSP:
 541                         nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_NTLMSSP);
 542                         break;
 543                 default:
 544                         talloc_free(mem_ctx);
 545                         abort();
 546                 }
 547
 548                 if (!NT_STATUS_IS_OK(nt_status)) {
 549                         DEBUG(1, ("GENSEC mech failed to start: %s\n", nt_errstr(nt_status)));
 550                         mux_printf(mux_id, "BH GENSEC mech failed to start\n");
 551                         talloc_free(mem_ctx);
 552                         return;
 553                 }
 554
 555         }
 556
 557         /* update */
 558
 559         if (strncmp(buf, "PW ", 3) == 0) {
 560                 state->set_password = talloc_strndup(state,
 561                                                      (const char *)in.data,
 562                                                      in.length);
 563
 564                 cli_credentials_set_password(gensec_get_credentials(state->gensec_state),
 565                                              state->set_password,
 566                                              CRED_SPECIFIED);
 567                 mux_printf(mux_id, "OK\n");
 568                 data_blob_free(&in);
 569                 talloc_free(mem_ctx);
 570                 return;
 571         }
 572
 573         if (strncmp(buf, "UG", 2) == 0) {
 574                 int i;
 575                 char *grouplist = NULL;
 576                 struct auth_session_info *session_info;
 577
 578                 nt_status = gensec_session_info(state->gensec_state, mem_ctx, &session_info);
 579                 if (!NT_STATUS_IS_OK(nt_status)) {
 580                         DEBUG(1, ("gensec_session_info failed: %s\n", nt_errstr(nt_status)));
 581                         mux_printf(mux_id, "BH %s\n", nt_errstr(nt_status));
 582                         data_blob_free(&in);
 583                         talloc_free(mem_ctx);
 584                         return;
 585                 }
 586
 587                 /* get the string onto the context */
 588                 grouplist = talloc_strdup(mem_ctx, "");
 589
 590                 for (i=0; i<session_info->security_token->num_sids; i++) {
 591                         struct security_token *token = session_info->security_token;
 592                         const char *sidstr = dom_sid_string(session_info,
 593                                                             &token->sids[i]);
 594                         grouplist = talloc_asprintf_append_buffer(grouplist, "%s,", sidstr);
 595                 }
 596
 597                 mux_printf(mux_id, "GL %s\n", grouplist);
 598                 talloc_free(session_info);
 599                 data_blob_free(&in);
 600                 talloc_free(mem_ctx);
 601                 return;
 602         }
 603
 604         if (strncmp(buf, "GK", 2) == 0) {
 605                 char *base64_key;
 606                 DEBUG(10, ("Requested session key\n"));
 607                 nt_status = gensec_session_key(state->gensec_state, mem_ctx, &session_key);
 608                 if(!NT_STATUS_IS_OK(nt_status)) {
 609                         DEBUG(1, ("gensec_session_key failed: %s\n", nt_errstr(nt_status)));
 610                         mux_printf(mux_id, "BH No session key\n");
 611                         talloc_free(mem_ctx);
 612                         return;
 613                 } else {
 614                         base64_key = base64_encode_data_blob(state, session_key);
 615                         mux_printf(mux_id, "GK %s\n", base64_key);
 616                         talloc_free(base64_key);
 617                 }
 618                 talloc_free(mem_ctx);
 619                 return;
 620         }
 621
 622         if (strncmp(buf, "GF", 2) == 0) {
 623                 struct ntlmssp_state *ntlmssp_state;
 624                 uint32_t neg_flags;
 625
 626                 ntlmssp_state = talloc_get_type(state->gensec_state->private_data,
 627                                 struct ntlmssp_state);
 628                 neg_flags = ntlmssp_state->neg_flags;
 629
 630                 DEBUG(10, ("Requested negotiated feature flags\n"));
 631                 mux_printf(mux_id, "GF 0x%08x\n", neg_flags);
 632                 return;
 633         }
 634
 635         nt_status = gensec_update(state->gensec_state, mem_ctx, ev, in, &out);
 636
 637         /* don't leak 'bad password'/'no such user' info to the network client */
 638         nt_status = nt_status_squash(nt_status);
 639
 640         if (out.length) {
 641                 out_base64 = base64_encode_data_blob(mem_ctx, out);
 642         } else {
 643                 out_base64 = NULL;
 644         }
 645
 646         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 647                 reply_arg = "*";
 648                 if (first) {
 649                         reply_code = "YR";
 650                 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
 651                         reply_code = "KK";
 652                 } else if (state->gensec_state->gensec_role == GENSEC_SERVER) {
 653                         reply_code = "TT";
 654                 } else {
 655                         abort();
 656                 }
 657
 658
 659         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
 660                 reply_code = "BH NT_STATUS_ACCESS_DENIED";
 661                 reply_arg = nt_errstr(nt_status);
 662                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 663         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
 664                 reply_code = "BH NT_STATUS_UNSUCCESSFUL";
 665                 reply_arg = nt_errstr(nt_status);
 666                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 667         } else if (!NT_STATUS_IS_OK(nt_status)) {
 668                 reply_code = "NA";
 669                 reply_arg = nt_errstr(nt_status);
 670                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 671         } else if /* OK */ (state->gensec_state->gensec_role == GENSEC_SERVER) {
 672                 struct auth_session_info *session_info;
 673
 674                 nt_status = gensec_session_info(state->gensec_state, mem_ctx, &session_info);
 675                 if (!NT_STATUS_IS_OK(nt_status)) {
 676                         reply_code = "BH Failed to retrive session info";
 677                         reply_arg = nt_errstr(nt_status);
 678                         DEBUG(1, ("GENSEC failed to retrieve the session info: %s\n", nt_errstr(nt_status)));
 679                 } else {
 680
 681                         reply_code = "AF";
 682                         reply_arg = talloc_asprintf(state->gensec_state,
 683                                                     "%s%s%s", session_info->info->domain_name,
 684                                                     lpcfg_winbind_separator(lp_ctx), session_info->info->account_name);
 685                         talloc_free(session_info);
 686                 }
 687         } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
 688                 reply_code = "AF";
 689                 reply_arg = out_base64;
 690         } else {
 691                 abort();
 692         }
 693
 694         switch (stdio_helper_mode) {
 695         case GSS_SPNEGO_SERVER:
 696                 mux_printf(mux_id, "%s %s %s\n", reply_code,
 697                           out_base64 ? out_base64 : "*",
 698                           reply_arg ? reply_arg : "*");
 699                 break;
 700         default:
 701                 if (out_base64) {
 702                         mux_printf(mux_id, "%s %s\n", reply_code, out_base64);
 703                 } else if (reply_arg) {
 704                         mux_printf(mux_id, "%s %s\n", reply_code, reply_arg);
 705                 } else {
 706                         mux_printf(mux_id, "%s\n", reply_code);
 707                 }
 708         }
 709
 710         talloc_free(mem_ctx);
 711         return;
 712 }
 713
 714 static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
 715                                          struct loadparm_context *lp_ctx,
 716                                          char *buf, int length, void **private1,
 717                                          unsigned int mux_id, void **private2)
 718 {
 719         char *request, *parameter;
 720         static DATA_BLOB challenge;
 721         static DATA_BLOB lm_response;
 722         static DATA_BLOB nt_response;
 723         static char *full_username;
 724         static char *username;
 725         static char *domain;
 726         static char *plaintext_password;
 727         static bool ntlm_server_1_user_session_key;
 728         static bool ntlm_server_1_lm_session_key;
 729
 730         if (strequal(buf, ".")) {
 731                 if (!full_username && !username) {
 732                         mux_printf(mux_id, "Error: No username supplied!\n");
 733                 } else if (plaintext_password) {
 734                         /* handle this request as plaintext */
 735                         if (!full_username) {
 736                                 if (asprintf(&full_username, "%s%c%s", domain, *lpcfg_winbind_separator(lp_ctx), username) < 0) {
 737                                         mux_printf(mux_id, "Error: Out of memory in asprintf!\n.\n");
 738                                         return;
 739                                 }
 740                         }
 741                         if (check_plaintext_auth(full_username, plaintext_password, false)) {
 742                                 mux_printf(mux_id, "Authenticated: Yes\n");
 743                         } else {
 744                                 mux_printf(mux_id, "Authenticated: No\n");
 745                         }
 746                 } else if (!lm_response.data && !nt_response.data) {
 747                         mux_printf(mux_id, "Error: No password supplied!\n");
 748                 } else if (!challenge.data) {
 749                         mux_printf(mux_id, "Error: No lanman-challenge supplied!\n");
 750                 } else {
 751                         char *error_string = NULL;
 752                         DATA_BLOB lm_key;
 753                         DATA_BLOB user_session_key;
 754                         uint32_t flags = 0;
 755
 756                         if (full_username && !username) {
 757                                 SAFE_FREE(username);
 758                                 SAFE_FREE(domain);
 759                                 if (!parse_ntlm_auth_domain_user(full_username, &username,
 760                                                                                                  &domain,
 761                                                                                                  *lpcfg_winbind_separator(lp_ctx))) {
 762                                         /* username might be 'tainted', don't print into our new-line deleimianted stream */
 763                                         mux_printf(mux_id, "Error: Could not parse into domain and username\n");
 764                                 }
 765                         }
 766
 767                         if (!domain) {
 768                                 domain = smb_xstrdup(lpcfg_workgroup(lp_ctx));
 769                         }
 770
 771                         if (ntlm_server_1_lm_session_key)
 772                                 flags |= NTLM_AUTH_FLAG_LMKEY;
 773
 774                         if (ntlm_server_1_user_session_key)
 775                                 flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY;
 776
 777                         if (!NT_STATUS_IS_OK(
 778                                     local_pw_check_specified(lp_ctx,
 779                                                              username,
 780                                                               domain,
 781                                                               lpcfg_netbios_name(lp_ctx),
 782                                                               &challenge,
 783                                                               &lm_response,
 784                                                               &nt_response,
 785                                                               flags,
 786                                                               &lm_key,
 787                                                               &user_session_key,
 788                                                               &error_string,
 789                                                               NULL))) {
 790
 791                                 mux_printf(mux_id, "Authenticated: No\n");
 792                                 mux_printf(mux_id, "Authentication-Error: %s\n.\n", error_string);
 793                                 SAFE_FREE(error_string);
 794                         } else {
 795                                 static char zeros[16];
 796                                 char *hex_lm_key;
 797                                 char *hex_user_session_key;
 798
 799                                 mux_printf(mux_id, "Authenticated: Yes\n");
 800
 801                                 if (ntlm_server_1_lm_session_key
 802                                     && lm_key.length
 803                                     && (memcmp(zeros, lm_key.data,
 804                                                                 lm_key.length) != 0)) {
 805                                         hex_encode(lm_key.data,
 806                                                    lm_key.length,
 807                                                    &hex_lm_key);
 808                                         mux_printf(mux_id, "LANMAN-Session-Key: %s\n", hex_lm_key);
 809                                         SAFE_FREE(hex_lm_key);
 810                                 }
 811
 812                                 if (ntlm_server_1_user_session_key
 813                                     && user_session_key.length
 814                                     && (memcmp(zeros, user_session_key.data,
 815                                                user_session_key.length) != 0)) {
 816                                         hex_encode(user_session_key.data,
 817                                                    user_session_key.length,
 818                                                    &hex_user_session_key);
 819                                         mux_printf(mux_id, "User-Session-Key: %s\n", hex_user_session_key);
 820                                         SAFE_FREE(hex_user_session_key);
 821                                 }
 822                         }
 823                 }
 824                 /* clear out the state */
 825                 challenge = data_blob(NULL, 0);
 826                 nt_response = data_blob(NULL, 0);
 827                 lm_response = data_blob(NULL, 0);
 828                 SAFE_FREE(full_username);
 829                 SAFE_FREE(username);
 830                 SAFE_FREE(domain);
 831                 SAFE_FREE(plaintext_password);
 832                 ntlm_server_1_user_session_key = false;
 833                 ntlm_server_1_lm_session_key = false;
 834                 mux_printf(mux_id, ".\n");
 835
 836                 return;
 837         }
 838
 839         request = buf;
 840
 841         /* Indicates a base64 encoded structure */
 842         parameter = strstr(request, ":: ");
 843         if (!parameter) {
 844                 parameter = strstr(request, ": ");
 845
 846                 if (!parameter) {
 847                         DEBUG(0, ("Parameter not found!\n"));
 848                         mux_printf(mux_id, "Error: Parameter not found!\n.\n");
 849                         return;
 850                 }
 851
 852                 parameter[0] ='\0';
 853                 parameter++;
 854                 parameter[0] ='\0';
 855                 parameter++;
 856
 857         } else {
 858                 parameter[0] ='\0';
 859                 parameter++;
 860                 parameter[0] ='\0';
 861                 parameter++;
 862                 parameter[0] ='\0';
 863                 parameter++;
 864
 865                 base64_decode_inplace(parameter);
 866         }
 867
 868         if (strequal(request, "LANMAN-Challenge")) {
 869                 challenge = strhex_to_data_blob(NULL, parameter);
 870                 if (challenge.length != 8) {
 871                         mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
 872                                   parameter,
 873                                   (int)challenge.length);
 874                         challenge = data_blob(NULL, 0);
 875                 }
 876         } else if (strequal(request, "NT-Response")) {
 877                 nt_response = strhex_to_data_blob(NULL, parameter);
 878                 if (nt_response.length < 24) {
 879                         mux_printf(mux_id, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
 880                                   parameter,
 881                                   (int)nt_response.length);
 882                         nt_response = data_blob(NULL, 0);
 883                 }
 884         } else if (strequal(request, "LANMAN-Response")) {
 885                 lm_response = strhex_to_data_blob(NULL, parameter);
 886                 if (lm_response.length != 24) {
 887                         mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
 888                                   parameter,
 889                                   (int)lm_response.length);
 890                         lm_response = data_blob(NULL, 0);
 891                 }
 892         } else if (strequal(request, "Password")) {
 893                 plaintext_password = smb_xstrdup(parameter);
 894         } else if (strequal(request, "NT-Domain")) {
 895                 domain = smb_xstrdup(parameter);
 896         } else if (strequal(request, "Username")) {
 897                 username = smb_xstrdup(parameter);
 898         } else if (strequal(request, "Full-Username")) {
 899                 full_username = smb_xstrdup(parameter);
 900         } else if (strequal(request, "Request-User-Session-Key")) {
 901                 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
 902         } else if (strequal(request, "Request-LanMan-Session-Key")) {
 903                 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
 904         } else {
 905                 mux_printf(mux_id, "Error: Unknown request %s\n.\n", request);
 906         }
 907 }
 908
 909 static void manage_squid_request(struct loadparm_context *lp_ctx, enum stdio_helper_mode helper_mode,
 910                                  stdio_helper_function fn, void **private2)
 911 {
 912         char *buf;
 913         char tmp[INITIAL_BUFFER_SIZE+1];
 914         unsigned int mux_id = 0;
 915         int length, buf_size = 0;
 916         char *c;
 917         struct mux_private {
 918                 unsigned int max_mux;
 919                 void **private_pointers;
 920         };
 921
 922         static struct mux_private *mux_private;
 923         static void *normal_private;
 924         void **private1;
 925
 926         buf = talloc_strdup(NULL, "");
 927
 928         if (buf == NULL) {
 929                 DEBUG(0, ("Failed to allocate memory for reading the input "
 930                           "buffer.\n"));
 931                 x_fprintf(x_stdout, "ERR\n");
 932                 return;
 933         }
 934
 935         do {
 936                 /* this is not a typo - x_fgets doesn't work too well under
 937                  * squid */
 938                 if (fgets(tmp, INITIAL_BUFFER_SIZE, stdin) == NULL) {
 939                         if (ferror(stdin)) {
 940                                 DEBUG(1, ("fgets() failed! dying..... errno=%d "
 941                                           "(%s)\n", ferror(stdin),
 942                                           strerror(ferror(stdin))));
 943
 944                                 exit(1);    /* BIIG buffer */
 945                         }
 946                         exit(0);
 947                 }
 948
 949                 buf = talloc_strdup_append_buffer(buf, tmp);
 950                 buf_size += INITIAL_BUFFER_SIZE;
 951
 952                 if (buf_size > MAX_BUFFER_SIZE) {
 953                         DEBUG(0, ("Invalid Request (too large)\n"));
 954                         x_fprintf(x_stdout, "ERR\n");
 955                         talloc_free(buf);
 956                         return;
 957                 }
 958
 959                 c = strchr(buf, '\n');
 960         } while (c == NULL);
 961
 962         *c = '\0';
 963         length = c-buf;
 964
 965         DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
 966
 967         if (buf[0] == '\0') {
 968                 DEBUG(0, ("Invalid Request (empty)\n"));
 969                 x_fprintf(x_stdout, "ERR\n");
 970                 talloc_free(buf);
 971                 return;
 972         }
 973
 974         if (opt_multiplex) {
 975                 if (sscanf(buf, "%u ", &mux_id) != 1) {
 976                         DEBUG(0, ("Invalid Request - no multiplex id\n"));
 977                         x_fprintf(x_stdout, "ERR\n");
 978                         talloc_free(buf);
 979                         return;
 980                 }
 981                 if (!mux_private) {
 982                         mux_private = talloc(NULL, struct mux_private);
 983                         mux_private->max_mux = 0;
 984                         mux_private->private_pointers = NULL;
 985                 }
 986
 987                 c=strchr(buf,' ');
 988                 if (!c) {
 989                         DEBUG(0, ("Invalid Request - no data after multiplex id\n"));
 990                         x_fprintf(x_stdout, "ERR\n");
 991                         talloc_free(buf);
 992                         return;
 993                 }
 994                 c++;
 995                 if (mux_id >= mux_private->max_mux) {
 996                         unsigned int prev_max = mux_private->max_mux;
 997                         mux_private->max_mux = mux_id + 1;
 998                         mux_private->private_pointers
 999                                 = talloc_realloc(mux_private,
1000                                                    mux_private->private_pointers,
1001                                                    void *, mux_private->max_mux);
1002                         memset(&mux_private->private_pointers[prev_max], '\0',
1003                                (sizeof(*mux_private->private_pointers) * (mux_private->max_mux - prev_max)));
1004                 };
1005
1006                 private1 = &mux_private->private_pointers[mux_id];
1007         } else {
1008                 c = buf;
1009                 private1 = &normal_private;
1010         }
1011
1012         fn(helper_mode, lp_ctx, c, length, private1, mux_id, private2);
1013         talloc_free(buf);
1014 }
1015
1016 static void squid_stream(struct loadparm_context *lp_ctx,
1017                          enum stdio_helper_mode stdio_mode,
1018                          stdio_helper_function fn) {
1019         /* initialize FDescs */
1020         x_setbuf(x_stdout, NULL);
1021         x_setbuf(x_stderr, NULL);
1022         while(1) {
1023                 manage_squid_request(lp_ctx, stdio_mode, fn, NULL);
1024         }
1025 }
1026
1027
1028 /* Main program */
1029
1030 enum {
1031         OPT_USERNAME = 1000,
1032         OPT_DOMAIN,
1033         OPT_WORKSTATION,
1034         OPT_CHALLENGE,
1035         OPT_RESPONSE,
1036         OPT_LM,
1037         OPT_NT,
1038         OPT_PASSWORD,
1039         OPT_LM_KEY,
1040         OPT_USER_SESSION_KEY,
1041         OPT_DIAGNOSTICS,
1042         OPT_REQUIRE_MEMBERSHIP,
1043         OPT_MULTIPLEX,
1044         OPT_USE_CACHED_CREDS,
1045 };
1046
1047 int main(int argc, const char **argv)
1048 {
1049         static const char *helper_protocol;
1050         int opt;
1051
1052         poptContext pc;
1053
1054         /* NOTE: DO NOT change this interface without considering the implications!
1055            This is an external interface, which other programs will use to interact
1056            with this helper.
1057         */
1058
1059         /* We do not use single-letter command abbreviations, because they harm future
1060            interface stability. */
1061
1062         struct poptOption long_options[] = {
1063                 POPT_AUTOHELP
1064                 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
1065                 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
1066                 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
1067                 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"},
1068                 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
1069                 { "multiplex", 0, POPT_ARG_NONE, &opt_multiplex, OPT_MULTIPLEX, "Multiplex Mode"},
1070                 { "use-cached-creds", 0, POPT_ARG_NONE, &use_cached_creds, OPT_USE_CACHED_CREDS, "silently ignored for compatibility reasons"},
1071                 POPT_COMMON_SAMBA
1072                 POPT_COMMON_VERSION
1073                 { NULL }
1074         };
1075
1076         /* Samba client initialisation */
1077
1078         setup_logging(NULL, DEBUG_STDERR);
1079
1080         /* Parse options */
1081
1082         pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
1083
1084         /* Parse command line options */
1085
1086         if (argc == 1) {
1087                 poptPrintHelp(pc, stderr, 0);
1088                 return 1;
1089         }
1090
1091         pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
1092                             POPT_CONTEXT_KEEP_FIRST);
1093
1094         while((opt = poptGetNextOpt(pc)) != -1) {
1095                 if (opt < -1) {
1096                         break;
1097                 }
1098         }
1099         if (opt < -1) {
1100                 fprintf(stderr, "%s: %s\n",
1101                         poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1102                         poptStrerror(opt));
1103                 return 1;
1104         }
1105
1106         gensec_init();
1107
1108         if (opt_domain == NULL) {
1109                 opt_domain = lpcfg_workgroup(cmdline_lp_ctx);
1110         }
1111
1112         if (helper_protocol) {
1113                 int i;
1114                 for (i=0; i<NUM_HELPER_MODES; i++) {
1115                         if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
1116                                 squid_stream(cmdline_lp_ctx, stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
1117                                 exit(0);
1118                         }
1119                 }
1120                 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
1121
1122                 for (i=0; i<NUM_HELPER_MODES; i++) {
1123                         x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
1124                 }
1125
1126                 exit(1);
1127         }
1128
1129         if (!opt_username) {
1130                 x_fprintf(x_stderr, "username must be specified!\n\n");
1131                 poptPrintHelp(pc, stderr, 0);
1132                 exit(1);
1133         }
1134
1135         if (opt_workstation == NULL) {
1136                 opt_workstation = lpcfg_netbios_name(cmdline_lp_ctx);
1137         }
1138
1139         if (!opt_password) {
1140                 char pwd[256] = {0};
1141                 int rc;
1142
1143                 rc = samba_getpass("Password: ", pwd, sizeof(pwd), false, false);
1144                 if (rc == 0) {
1145                         opt_password = smb_xstrdup(pwd);
1146                 }
1147         }
1148
1149         {
1150                 char *user;
1151
1152                 if (asprintf(&user, "%s%c%s", opt_domain,
1153                              *lpcfg_winbind_separator(cmdline_lp_ctx),
1154                              opt_username) < 0) {
1155                         return 1;
1156                 }
1157                 if (!check_plaintext_auth(user, opt_password, true)) {
1158                         return 1;
1159                 }
1160         }
1161
1162         /* Exit code */
1163
1164         poptFreeContext(pc);
1165         return 0;
1166 }