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/gensec/gensec_internal.h" /* TODO: remove this */
  31 #include "auth/auth.h"
  32 #include "librpc/gen_ndr/ndr_netlogon.h"
  33 #include "auth/auth_sam.h"
  34 #include "libcli/auth/libcli_auth.h"
  35 #include "libcli/security/security.h"
  36 #include "lib/events/events.h"
  37 #include "lib/messaging/messaging.h"
  38 #include "lib/messaging/irpc.h"
  39 #include "auth/ntlmssp/ntlmssp.h"
  40 #include "param/param.h"
  41
  42 #define INITIAL_BUFFER_SIZE 300
  43 #define MAX_BUFFER_SIZE 63000
  44
  45 enum stdio_helper_mode {
  46         SQUID_2_4_BASIC,
  47         SQUID_2_5_BASIC,
  48         SQUID_2_5_NTLMSSP,
  49         NTLMSSP_CLIENT_1,
  50         GSS_SPNEGO_CLIENT,
  51         GSS_SPNEGO_SERVER,
  52         NTLM_SERVER_1,
  53         NUM_HELPER_MODES
  54 };
  55
  56 #define NTLM_AUTH_FLAG_USER_SESSION_KEY     0x0004
  57 #define NTLM_AUTH_FLAG_LMKEY                0x0008
  58
  59
  60 typedef void (*stdio_helper_function)(enum stdio_helper_mode stdio_helper_mode,
  61                                       struct loadparm_context *lp_ctx,
  62                                       char *buf, int length, void **private1,
  63                                       unsigned int mux_id, void **private2);
  64
  65 static void manage_squid_basic_request (enum stdio_helper_mode stdio_helper_mode,
  66                                         struct loadparm_context *lp_ctx,
  67                                         char *buf, int length, void **private1,
  68                                         unsigned int mux_id, void **private2);
  69
  70 static void manage_gensec_request (enum stdio_helper_mode stdio_helper_mode,
  71                                    struct loadparm_context *lp_ctx,
  72                                    char *buf, int length, void **private1,
  73                                    unsigned int mux_id, void **private2);
  74
  75 static void manage_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode,
  76                                           struct loadparm_context *lp_ctx,
  77                                           char *buf, int length, void **private1,
  78                                           unsigned int mux_id, void **private2);
  79
  80 static void manage_squid_request(struct loadparm_context *lp_ctx,
  81                                  enum stdio_helper_mode helper_mode,
  82                                  stdio_helper_function fn, void **private2);
  83
  84 static const struct {
  85         enum stdio_helper_mode mode;
  86         const char *name;
  87         stdio_helper_function fn;
  88 } stdio_helper_protocols[] = {
  89         { SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
  90         { SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
  91         { SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request},
  92         { GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request},
  93         { GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request},
  94         { NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request},
  95         { NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
  96         { NUM_HELPER_MODES, NULL, NULL}
  97 };
  98
  99 extern int winbindd_fd;
 100
 101 static const char *opt_username;
 102 static const char *opt_domain;
 103 static const char *opt_workstation;
 104 static const char *opt_password;
 105 static int opt_multiplex;
 106 static int use_cached_creds;
 107
 108
 109 static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
 110
 111 static void mux_printf(unsigned int mux_id, const char *format, ...)
 112 {
 113         va_list ap;
 114
 115         if (opt_multiplex) {
 116                 x_fprintf(x_stdout, "%d ", mux_id);
 117         }
 118
 119         va_start(ap, format);
 120         x_vfprintf(x_stdout, format, ap);
 121         va_end(ap);
 122 }
 123
 124
 125
 126 /* Copy of parse_domain_user from winbindd_util.c.  Parse a string of the
 127    form DOMAIN/user into a domain and a user */
 128
 129 static bool parse_ntlm_auth_domain_user(const char *domuser, char **domain,
 130                                                                                 char **user, char winbind_separator)
 131 {
 132
 133         char *p = strchr(domuser, winbind_separator);
 134
 135         if (!p) {
 136                 return false;
 137         }
 138
 139         *user = smb_xstrdup(p+1);
 140         *domain = smb_xstrdup(domuser);
 141         (*domain)[PTR_DIFF(p, domuser)] = 0;
 142
 143         return true;
 144 }
 145
 146
 147 /* Authenticate a user with a plaintext password */
 148
 149 static bool check_plaintext_auth(const char *user, const char *pass,
 150                                  bool stdout_diagnostics)
 151 {
 152         return (strcmp(pass, opt_password) == 0);
 153 }
 154
 155 /* authenticate a user with an encrypted username/password */
 156
 157 static NTSTATUS local_pw_check_specified(struct loadparm_context *lp_ctx,
 158                                          const char *username,
 159                                          const char *domain,
 160                                          const char *workstation,
 161                                          const DATA_BLOB *challenge,
 162                                          const DATA_BLOB *lm_response,
 163                                          const DATA_BLOB *nt_response,
 164                                          uint32_t flags,
 165                                          DATA_BLOB *lm_session_key,
 166                                          DATA_BLOB *user_session_key,
 167                                          char **error_string,
 168                                          char **unix_name)
 169 {
 170         NTSTATUS nt_status;
 171         struct samr_Password lm_pw, nt_pw;
 172         struct samr_Password *lm_pwd, *nt_pwd;
 173         TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
 174         if (!mem_ctx) {
 175                 nt_status = NT_STATUS_NO_MEMORY;
 176         } else {
 177
 178                 E_md4hash(opt_password, nt_pw.hash);
 179                 if (E_deshash(opt_password, lm_pw.hash)) {
 180                         lm_pwd = &lm_pw;
 181                 } else {
 182                         lm_pwd = NULL;
 183                 }
 184                 nt_pwd = &nt_pw;
 185
 186
 187                 nt_status = ntlm_password_check(mem_ctx,
 188                                                 lpcfg_lanman_auth(lp_ctx),
 189                                                 lpcfg_ntlm_auth(lp_ctx),
 190                                                 MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT |
 191                                                 MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
 192                                                 challenge,
 193                                                 lm_response,
 194                                                 nt_response,
 195                                                 username,
 196                                                 username,
 197                                                 domain,
 198                                                 lm_pwd, nt_pwd, user_session_key, lm_session_key);
 199
 200                 if (NT_STATUS_IS_OK(nt_status)) {
 201                         if (unix_name) {
 202                                 if (asprintf(unix_name, "%s%c%s", domain,
 203                                              *lpcfg_winbind_separator(lp_ctx),
 204                                              username) < 0) {
 205                                         nt_status = NT_STATUS_NO_MEMORY;
 206                                 }
 207                         }
 208                 } else {
 209                         DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
 210                                   domain, username, workstation,
 211                                   nt_errstr(nt_status)));
 212                 }
 213                 talloc_free(mem_ctx);
 214         }
 215         if (error_string) {
 216                 *error_string = strdup(nt_errstr(nt_status));
 217         }
 218         return nt_status;
 219
 220
 221 }
 222
 223 static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode,
 224                                        struct loadparm_context *lp_ctx,
 225                                        char *buf, int length, void **private1,
 226                                        unsigned int mux_id, void **private2)
 227 {
 228         char *user, *pass;
 229         user=buf;
 230
 231         pass = memchr(buf, ' ', length);
 232         if (!pass) {
 233                 DEBUG(2, ("Password not found. Denying access\n"));
 234                 mux_printf(mux_id, "ERR\n");
 235                 return;
 236         }
 237         *pass='\0';
 238         pass++;
 239
 240         if (stdio_helper_mode == SQUID_2_5_BASIC) {
 241                 rfc1738_unescape(user);
 242                 rfc1738_unescape(pass);
 243         }
 244
 245         if (check_plaintext_auth(user, pass, false)) {
 246                 mux_printf(mux_id, "OK\n");
 247         } else {
 248                 mux_printf(mux_id, "ERR\n");
 249         }
 250 }
 251
 252 /* This is a bit hairy, but the basic idea is to do a password callback
 253    to the calling application.  The callback comes from within gensec */
 254
 255 static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode,
 256                                          struct loadparm_context *lp_ctx,
 257                                          char *buf, int length, void **private1,
 258                                          unsigned int mux_id, void **password)
 259 {
 260         DATA_BLOB in;
 261         if (strlen(buf) < 2) {
 262                 DEBUG(1, ("query [%s] invalid", buf));
 263                 mux_printf(mux_id, "BH Query invalid\n");
 264                 return;
 265         }
 266
 267         if (strlen(buf) > 3) {
 268                 in = base64_decode_data_blob(buf + 3);
 269         } else {
 270                 in = data_blob(NULL, 0);
 271         }
 272
 273         if (strncmp(buf, "PW ", 3) == 0) {
 274
 275                 *password = talloc_strndup(*private1 /* hopefully the right gensec context, useful to use for talloc */,
 276                                            (const char *)in.data, in.length);
 277
 278                 if (*password == NULL) {
 279                         DEBUG(1, ("Out of memory\n"));
 280                         mux_printf(mux_id, "BH Out of memory\n");
 281                         data_blob_free(&in);
 282                         return;
 283                 }
 284
 285                 mux_printf(mux_id, "OK\n");
 286                 data_blob_free(&in);
 287                 return;
 288         }
 289         DEBUG(1, ("Asked for (and expected) a password\n"));
 290         mux_printf(mux_id, "BH Expected a password\n");
 291         data_blob_free(&in);
 292 }
 293
 294 /**
 295  * Callback for password credentials.  This is not async, and when
 296  * GENSEC and the credentials code is made async, it will look rather
 297  * different.
 298  */
 299
 300 static const char *get_password(struct cli_credentials *credentials)
 301 {
 302         char *password = NULL;
 303         void *cb = cli_credentials_callback_data_void(credentials);
 304
 305         /* Ask for a password */
 306         mux_printf((unsigned int)(uintptr_t)cb, "PW\n");
 307         cli_credentials_set_callback_data(credentials, NULL);
 308
 309         manage_squid_request(cmdline_lp_ctx, NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, (void **)&password);
 310         return password;
 311 }
 312
 313 /**
 314  Check if a string is part of a list.
 315 **/
 316 static bool in_list(const char *s, const char *list, bool casesensitive)
 317 {
 318         char *tok;
 319         size_t tok_len = 1024;
 320         const char *p=list;
 321
 322         if (!list)
 323                 return false;
 324
 325         tok = (char *)malloc(tok_len);
 326         if (!tok) {
 327                 return false;
 328         }
 329
 330         while (next_token(&p, tok, LIST_SEP, tok_len)) {
 331                 if ((casesensitive?strcmp:strcasecmp_m)(tok,s) == 0) {
 332                         free(tok);
 333                         return true;
 334                 }
 335         }
 336         free(tok);
 337         return false;
 338 }
 339
 340 static void gensec_want_feature_list(struct gensec_security *state, char* feature_list)
 341 {
 342         if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list, true)) {
 343                 DEBUG(10, ("want GENSEC_FEATURE_SESSION_KEY\n"));
 344                 gensec_want_feature(state, GENSEC_FEATURE_SESSION_KEY);
 345         }
 346         if (in_list("NTLMSSP_FEATURE_SIGN", feature_list, true)) {
 347                 DEBUG(10, ("want GENSEC_FEATURE_SIGN\n"));
 348                 gensec_want_feature(state, GENSEC_FEATURE_SIGN);
 349         }
 350         if (in_list("NTLMSSP_FEATURE_SEAL", feature_list, true)) {
 351                 DEBUG(10, ("want GENSEC_FEATURE_SEAL\n"));
 352                 gensec_want_feature(state, GENSEC_FEATURE_SEAL);
 353         }
 354 }
 355
 356 static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode,
 357                                   struct loadparm_context *lp_ctx,
 358                                   char *buf, int length, void **private1,
 359                                   unsigned int mux_id, void **private2)
 360 {
 361         DATA_BLOB in;
 362         DATA_BLOB out = data_blob(NULL, 0);
 363         char *out_base64 = NULL;
 364         const char *reply_arg = NULL;
 365         struct gensec_ntlm_state {
 366                 struct gensec_security *gensec_state;
 367                 const char *set_password;
 368         };
 369         struct gensec_ntlm_state *state;
 370         struct tevent_context *ev;
 371         struct imessaging_context *msg;
 372
 373         NTSTATUS nt_status;
 374         bool first = false;
 375         const char *reply_code;
 376         struct cli_credentials *creds;
 377
 378         static char *want_feature_list = NULL;
 379         static DATA_BLOB session_key;
 380
 381         TALLOC_CTX *mem_ctx;
 382
 383         if (*private1) {
 384                 state = (struct gensec_ntlm_state *)*private1;
 385         } else {
 386                 state = talloc_zero(NULL, struct gensec_ntlm_state);
 387                 if (!state) {
 388                         mux_printf(mux_id, "BH No Memory\n");
 389                         exit(1);
 390                 }
 391                 *private1 = state;
 392                 if (opt_password) {
 393                         state->set_password = opt_password;
 394                 }
 395         }
 396
 397         if (strlen(buf) < 2) {
 398                 DEBUG(1, ("query [%s] invalid", buf));
 399                 mux_printf(mux_id, "BH Query invalid\n");
 400                 return;
 401         }
 402
 403         if (strlen(buf) > 3) {
 404                 if(strncmp(buf, "SF ", 3) == 0) {
 405                         DEBUG(10, ("Setting flags to negotiate\n"));
 406                         talloc_free(want_feature_list);
 407                         want_feature_list = talloc_strndup(state, buf+3, strlen(buf)-3);
 408                         mux_printf(mux_id, "OK\n");
 409                         return;
 410                 }
 411                 in = base64_decode_data_blob(buf + 3);
 412         } else {
 413                 in = data_blob(NULL, 0);
 414         }
 415
 416         if (strncmp(buf, "YR", 2) == 0) {
 417                 if (state->gensec_state) {
 418                         talloc_free(state->gensec_state);
 419                         state->gensec_state = NULL;
 420                 }
 421         } else if ( (strncmp(buf, "OK", 2) == 0)) {
 422                 /* Just return BH, like ntlm_auth from Samba 3 does. */
 423                 mux_printf(mux_id, "BH Command expected\n");
 424                 data_blob_free(&in);
 425                 return;
 426         } else if ( (strncmp(buf, "TT ", 3) != 0) &&
 427                     (strncmp(buf, "KK ", 3) != 0) &&
 428                     (strncmp(buf, "AF ", 3) != 0) &&
 429                     (strncmp(buf, "NA ", 3) != 0) &&
 430                     (strncmp(buf, "UG", 2) != 0) &&
 431                     (strncmp(buf, "PW ", 3) != 0) &&
 432                     (strncmp(buf, "GK", 2) != 0) &&
 433                     (strncmp(buf, "GF", 2) != 0)) {
 434                 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
 435                 mux_printf(mux_id, "BH SPNEGO request invalid\n");
 436                 data_blob_free(&in);
 437                 return;
 438         }
 439
 440         ev = s4_event_context_init(state);
 441         if (!ev) {
 442                 exit(1);
 443         }
 444
 445         mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");
 446
 447         /* setup gensec */
 448         if (!(state->gensec_state)) {
 449                 switch (stdio_helper_mode) {
 450                 case GSS_SPNEGO_CLIENT:
 451                 case NTLMSSP_CLIENT_1:
 452                         /* setup the client side */
 453
 454                         nt_status = gensec_client_start(NULL, &state->gensec_state,
 455                                                         lpcfg_gensec_settings(NULL, lp_ctx));
 456                         if (!NT_STATUS_IS_OK(nt_status)) {
 457                                 talloc_free(mem_ctx);
 458                                 exit(1);
 459                         }
 460
 461                         break;
 462                 case GSS_SPNEGO_SERVER:
 463                 case SQUID_2_5_NTLMSSP:
 464                 {
 465                         const char *winbind_method[] = { "winbind", NULL };
 466                         struct auth4_context *auth_context;
 467
 468                         msg = imessaging_client_init(state, lp_ctx, ev);
 469                         if (!msg) {
 470                                 talloc_free(mem_ctx);
 471                                 exit(1);
 472                         }
 473                         nt_status = auth_context_create_methods(mem_ctx,
 474                                                                 winbind_method,
 475                                                                 ev,
 476                                                                 msg,
 477                                                                 lp_ctx,
 478                                                                 NULL,
 479                                                                 &auth_context);
 480
 481                         if (!NT_STATUS_IS_OK(nt_status)) {
 482                                 talloc_free(mem_ctx);
 483                                 exit(1);
 484                         }
 485
 486                         if (!NT_STATUS_IS_OK(gensec_server_start(state,
 487                                                                  lpcfg_gensec_settings(state, lp_ctx),
 488                                                                  auth_context, &state->gensec_state))) {
 489                                 talloc_free(mem_ctx);
 490                                 exit(1);
 491                         }
 492                         break;
 493                 }
 494                 default:
 495                         talloc_free(mem_ctx);
 496                         abort();
 497                 }
 498
 499                 creds = cli_credentials_init(state->gensec_state);
 500                 cli_credentials_set_conf(creds, lp_ctx);
 501                 if (opt_username) {
 502                         cli_credentials_set_username(creds, opt_username, CRED_SPECIFIED);
 503                 }
 504                 if (opt_domain) {
 505                         cli_credentials_set_domain(creds, opt_domain, CRED_SPECIFIED);
 506                 }
 507                 if (state->set_password) {
 508                         cli_credentials_set_password(creds, state->set_password, CRED_SPECIFIED);
 509                 } else {
 510                         void *cb = (void*)(uintptr_t)mux_id;
 511                         cli_credentials_set_callback_data(creds, cb);
 512                         cli_credentials_set_password_callback(creds, get_password);
 513                 }
 514                 if (opt_workstation) {
 515                         cli_credentials_set_workstation(creds, opt_workstation, CRED_SPECIFIED);
 516                 }
 517
 518                 switch (stdio_helper_mode) {
 519                 case GSS_SPNEGO_SERVER:
 520                 case SQUID_2_5_NTLMSSP:
 521                         cli_credentials_set_machine_account(creds, lp_ctx);
 522                         break;
 523                 default:
 524                         break;
 525                 }
 526
 527                 gensec_set_credentials(state->gensec_state, creds);
 528                 gensec_want_feature_list(state->gensec_state, want_feature_list);
 529
 530                 switch (stdio_helper_mode) {
 531                 case GSS_SPNEGO_CLIENT:
 532                 case GSS_SPNEGO_SERVER:
 533                         nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_SPNEGO);
 534                         if (!in.length) {
 535                                 first = true;
 536                         }
 537                         break;
 538                 case NTLMSSP_CLIENT_1:
 539                         if (!in.length) {
 540                                 first = true;
 541                         }
 542                         /* fall through */
 543                 case SQUID_2_5_NTLMSSP:
 544                         nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_NTLMSSP);
 545                         break;
 546                 default:
 547                         talloc_free(mem_ctx);
 548                         abort();
 549                 }
 550
 551                 if (!NT_STATUS_IS_OK(nt_status)) {
 552                         DEBUG(1, ("GENSEC mech failed to start: %s\n", nt_errstr(nt_status)));
 553                         mux_printf(mux_id, "BH GENSEC mech failed to start\n");
 554                         talloc_free(mem_ctx);
 555                         return;
 556                 }
 557
 558         }
 559
 560         /* update */
 561
 562         if (strncmp(buf, "PW ", 3) == 0) {
 563                 state->set_password = talloc_strndup(state,
 564                                                      (const char *)in.data,
 565                                                      in.length);
 566
 567                 cli_credentials_set_password(gensec_get_credentials(state->gensec_state),
 568                                              state->set_password,
 569                                              CRED_SPECIFIED);
 570                 mux_printf(mux_id, "OK\n");
 571                 data_blob_free(&in);
 572                 talloc_free(mem_ctx);
 573                 return;
 574         }
 575
 576         if (strncmp(buf, "UG", 2) == 0) {
 577                 int i;
 578                 char *grouplist = NULL;
 579                 struct auth_session_info *session_info;
 580
 581                 nt_status = gensec_session_info(state->gensec_state, mem_ctx, &session_info);
 582                 if (!NT_STATUS_IS_OK(nt_status)) {
 583                         DEBUG(1, ("gensec_session_info failed: %s\n", nt_errstr(nt_status)));
 584                         mux_printf(mux_id, "BH %s\n", nt_errstr(nt_status));
 585                         data_blob_free(&in);
 586                         talloc_free(mem_ctx);
 587                         return;
 588                 }
 589
 590                 /* get the string onto the context */
 591                 grouplist = talloc_strdup(mem_ctx, "");
 592
 593                 for (i=0; i<session_info->security_token->num_sids; i++) {
 594                         struct security_token *token = session_info->security_token;
 595                         const char *sidstr = dom_sid_string(session_info,
 596                                                             &token->sids[i]);
 597                         grouplist = talloc_asprintf_append_buffer(grouplist, "%s,", sidstr);
 598                 }
 599
 600                 mux_printf(mux_id, "GL %s\n", grouplist);
 601                 talloc_free(session_info);
 602                 data_blob_free(&in);
 603                 talloc_free(mem_ctx);
 604                 return;
 605         }
 606
 607         if (strncmp(buf, "GK", 2) == 0) {
 608                 char *base64_key;
 609                 DEBUG(10, ("Requested session key\n"));
 610                 nt_status = gensec_session_key(state->gensec_state, mem_ctx, &session_key);
 611                 if(!NT_STATUS_IS_OK(nt_status)) {
 612                         DEBUG(1, ("gensec_session_key failed: %s\n", nt_errstr(nt_status)));
 613                         mux_printf(mux_id, "BH No session key\n");
 614                         talloc_free(mem_ctx);
 615                         return;
 616                 } else {
 617                         base64_key = base64_encode_data_blob(state, session_key);
 618                         mux_printf(mux_id, "GK %s\n", base64_key);
 619                         talloc_free(base64_key);
 620                 }
 621                 talloc_free(mem_ctx);
 622                 return;
 623         }
 624
 625         if (strncmp(buf, "GF", 2) == 0) {
 626                 struct ntlmssp_state *ntlmssp_state;
 627                 uint32_t neg_flags;
 628
 629                 ntlmssp_state = talloc_get_type(state->gensec_state->private_data,
 630                                 struct ntlmssp_state);
 631                 neg_flags = ntlmssp_state->neg_flags;
 632
 633                 DEBUG(10, ("Requested negotiated feature flags\n"));
 634                 mux_printf(mux_id, "GF 0x%08x\n", neg_flags);
 635                 return;
 636         }
 637
 638         nt_status = gensec_update(state->gensec_state, mem_ctx, ev, in, &out);
 639
 640         /* don't leak 'bad password'/'no such user' info to the network client */
 641         nt_status = nt_status_squash(nt_status);
 642
 643         if (out.length) {
 644                 out_base64 = base64_encode_data_blob(mem_ctx, out);
 645         } else {
 646                 out_base64 = NULL;
 647         }
 648
 649         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 650                 reply_arg = "*";
 651                 if (first) {
 652                         reply_code = "YR";
 653                 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
 654                         reply_code = "KK";
 655                 } else if (state->gensec_state->gensec_role == GENSEC_SERVER) {
 656                         reply_code = "TT";
 657                 } else {
 658                         abort();
 659                 }
 660
 661
 662         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
 663                 reply_code = "BH NT_STATUS_ACCESS_DENIED";
 664                 reply_arg = nt_errstr(nt_status);
 665                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 666         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
 667                 reply_code = "BH NT_STATUS_UNSUCCESSFUL";
 668                 reply_arg = nt_errstr(nt_status);
 669                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 670         } else if (!NT_STATUS_IS_OK(nt_status)) {
 671                 reply_code = "NA";
 672                 reply_arg = nt_errstr(nt_status);
 673                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 674         } else if /* OK */ (state->gensec_state->gensec_role == GENSEC_SERVER) {
 675                 struct auth_session_info *session_info;
 676
 677                 nt_status = gensec_session_info(state->gensec_state, mem_ctx, &session_info);
 678                 if (!NT_STATUS_IS_OK(nt_status)) {
 679                         reply_code = "BH Failed to retrive session info";
 680                         reply_arg = nt_errstr(nt_status);
 681                         DEBUG(1, ("GENSEC failed to retrieve the session info: %s\n", nt_errstr(nt_status)));
 682                 } else {
 683
 684                         reply_code = "AF";
 685                         reply_arg = talloc_asprintf(state->gensec_state,
 686                                                     "%s%s%s", session_info->info->domain_name,
 687                                                     lpcfg_winbind_separator(lp_ctx), session_info->info->account_name);
 688                         talloc_free(session_info);
 689                 }
 690         } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
 691                 reply_code = "AF";
 692                 reply_arg = out_base64;
 693         } else {
 694                 abort();
 695         }
 696
 697         switch (stdio_helper_mode) {
 698         case GSS_SPNEGO_SERVER:
 699                 mux_printf(mux_id, "%s %s %s\n", reply_code,
 700                           out_base64 ? out_base64 : "*",
 701                           reply_arg ? reply_arg : "*");
 702                 break;
 703         default:
 704                 if (out_base64) {
 705                         mux_printf(mux_id, "%s %s\n", reply_code, out_base64);
 706                 } else if (reply_arg) {
 707                         mux_printf(mux_id, "%s %s\n", reply_code, reply_arg);
 708                 } else {
 709                         mux_printf(mux_id, "%s\n", reply_code);
 710                 }
 711         }
 712
 713         talloc_free(mem_ctx);
 714         return;
 715 }
 716
 717 static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
 718                                          struct loadparm_context *lp_ctx,
 719                                          char *buf, int length, void **private1,
 720                                          unsigned int mux_id, void **private2)
 721 {
 722         char *request, *parameter;
 723         static DATA_BLOB challenge;
 724         static DATA_BLOB lm_response;
 725         static DATA_BLOB nt_response;
 726         static char *full_username;
 727         static char *username;
 728         static char *domain;
 729         static char *plaintext_password;
 730         static bool ntlm_server_1_user_session_key;
 731         static bool ntlm_server_1_lm_session_key;
 732
 733         if (strequal(buf, ".")) {
 734                 if (!full_username && !username) {
 735                         mux_printf(mux_id, "Error: No username supplied!\n");
 736                 } else if (plaintext_password) {
 737                         /* handle this request as plaintext */
 738                         if (!full_username) {
 739                                 if (asprintf(&full_username, "%s%c%s", domain, *lpcfg_winbind_separator(lp_ctx), username) < 0) {
 740                                         mux_printf(mux_id, "Error: Out of memory in asprintf!\n.\n");
 741                                         return;
 742                                 }
 743                         }
 744                         if (check_plaintext_auth(full_username, plaintext_password, false)) {
 745                                 mux_printf(mux_id, "Authenticated: Yes\n");
 746                         } else {
 747                                 mux_printf(mux_id, "Authenticated: No\n");
 748                         }
 749                 } else if (!lm_response.data && !nt_response.data) {
 750                         mux_printf(mux_id, "Error: No password supplied!\n");
 751                 } else if (!challenge.data) {
 752                         mux_printf(mux_id, "Error: No lanman-challenge supplied!\n");
 753                 } else {
 754                         char *error_string = NULL;
 755                         DATA_BLOB lm_key;
 756                         DATA_BLOB user_session_key;
 757                         uint32_t flags = 0;
 758
 759                         if (full_username && !username) {
 760                                 SAFE_FREE(username);
 761                                 SAFE_FREE(domain);
 762                                 if (!parse_ntlm_auth_domain_user(full_username, &username,
 763                                                                                                  &domain,
 764                                                                                                  *lpcfg_winbind_separator(lp_ctx))) {
 765                                         /* username might be 'tainted', don't print into our new-line deleimianted stream */
 766                                         mux_printf(mux_id, "Error: Could not parse into domain and username\n");
 767                                 }
 768                         }
 769
 770                         if (!domain) {
 771                                 domain = smb_xstrdup(lpcfg_workgroup(lp_ctx));
 772                         }
 773
 774                         if (ntlm_server_1_lm_session_key)
 775                                 flags |= NTLM_AUTH_FLAG_LMKEY;
 776
 777                         if (ntlm_server_1_user_session_key)
 778                                 flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY;
 779
 780                         if (!NT_STATUS_IS_OK(
 781                                     local_pw_check_specified(lp_ctx,
 782                                                              username,
 783                                                               domain,
 784                                                               lpcfg_netbios_name(lp_ctx),
 785                                                               &challenge,
 786                                                               &lm_response,
 787                                                               &nt_response,
 788                                                               flags,
 789                                                               &lm_key,
 790                                                               &user_session_key,
 791                                                               &error_string,
 792                                                               NULL))) {
 793
 794                                 mux_printf(mux_id, "Authenticated: No\n");
 795                                 mux_printf(mux_id, "Authentication-Error: %s\n.\n", error_string);
 796                                 SAFE_FREE(error_string);
 797                         } else {
 798                                 static char zeros[16];
 799                                 char *hex_lm_key;
 800                                 char *hex_user_session_key;
 801
 802                                 mux_printf(mux_id, "Authenticated: Yes\n");
 803
 804                                 if (ntlm_server_1_lm_session_key
 805                                     && lm_key.length
 806                                     && (memcmp(zeros, lm_key.data,
 807                                                                 lm_key.length) != 0)) {
 808                                         hex_encode(lm_key.data,
 809                                                    lm_key.length,
 810                                                    &hex_lm_key);
 811                                         mux_printf(mux_id, "LANMAN-Session-Key: %s\n", hex_lm_key);
 812                                         SAFE_FREE(hex_lm_key);
 813                                 }
 814
 815                                 if (ntlm_server_1_user_session_key
 816                                     && user_session_key.length
 817                                     && (memcmp(zeros, user_session_key.data,
 818                                                user_session_key.length) != 0)) {
 819                                         hex_encode(user_session_key.data,
 820                                                    user_session_key.length,
 821                                                    &hex_user_session_key);
 822                                         mux_printf(mux_id, "User-Session-Key: %s\n", hex_user_session_key);
 823                                         SAFE_FREE(hex_user_session_key);
 824                                 }
 825                         }
 826                 }
 827                 /* clear out the state */
 828                 challenge = data_blob(NULL, 0);
 829                 nt_response = data_blob(NULL, 0);
 830                 lm_response = data_blob(NULL, 0);
 831                 SAFE_FREE(full_username);
 832                 SAFE_FREE(username);
 833                 SAFE_FREE(domain);
 834                 SAFE_FREE(plaintext_password);
 835                 ntlm_server_1_user_session_key = false;
 836                 ntlm_server_1_lm_session_key = false;
 837                 mux_printf(mux_id, ".\n");
 838
 839                 return;
 840         }
 841
 842         request = buf;
 843
 844         /* Indicates a base64 encoded structure */
 845         parameter = strstr(request, ":: ");
 846         if (!parameter) {
 847                 parameter = strstr(request, ": ");
 848
 849                 if (!parameter) {
 850                         DEBUG(0, ("Parameter not found!\n"));
 851                         mux_printf(mux_id, "Error: Parameter not found!\n.\n");
 852                         return;
 853                 }
 854
 855                 parameter[0] ='\0';
 856                 parameter++;
 857                 parameter[0] ='\0';
 858                 parameter++;
 859
 860         } else {
 861                 parameter[0] ='\0';
 862                 parameter++;
 863                 parameter[0] ='\0';
 864                 parameter++;
 865                 parameter[0] ='\0';
 866                 parameter++;
 867
 868                 base64_decode_inplace(parameter);
 869         }
 870
 871         if (strequal(request, "LANMAN-Challenge")) {
 872                 challenge = strhex_to_data_blob(NULL, parameter);
 873                 if (challenge.length != 8) {
 874                         mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
 875                                   parameter,
 876                                   (int)challenge.length);
 877                         challenge = data_blob(NULL, 0);
 878                 }
 879         } else if (strequal(request, "NT-Response")) {
 880                 nt_response = strhex_to_data_blob(NULL, parameter);
 881                 if (nt_response.length < 24) {
 882                         mux_printf(mux_id, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
 883                                   parameter,
 884                                   (int)nt_response.length);
 885                         nt_response = data_blob(NULL, 0);
 886                 }
 887         } else if (strequal(request, "LANMAN-Response")) {
 888                 lm_response = strhex_to_data_blob(NULL, parameter);
 889                 if (lm_response.length != 24) {
 890                         mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
 891                                   parameter,
 892                                   (int)lm_response.length);
 893                         lm_response = data_blob(NULL, 0);
 894                 }
 895         } else if (strequal(request, "Password")) {
 896                 plaintext_password = smb_xstrdup(parameter);
 897         } else if (strequal(request, "NT-Domain")) {
 898                 domain = smb_xstrdup(parameter);
 899         } else if (strequal(request, "Username")) {
 900                 username = smb_xstrdup(parameter);
 901         } else if (strequal(request, "Full-Username")) {
 902                 full_username = smb_xstrdup(parameter);
 903         } else if (strequal(request, "Request-User-Session-Key")) {
 904                 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
 905         } else if (strequal(request, "Request-LanMan-Session-Key")) {
 906                 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
 907         } else {
 908                 mux_printf(mux_id, "Error: Unknown request %s\n.\n", request);
 909         }
 910 }
 911
 912 static void manage_squid_request(struct loadparm_context *lp_ctx, enum stdio_helper_mode helper_mode,
 913                                  stdio_helper_function fn, void **private2)
 914 {
 915         char *buf;
 916         char tmp[INITIAL_BUFFER_SIZE+1];
 917         unsigned int mux_id = 0;
 918         int length, buf_size = 0;
 919         char *c;
 920         struct mux_private {
 921                 unsigned int max_mux;
 922                 void **private_pointers;
 923         };
 924
 925         static struct mux_private *mux_private;
 926         static void *normal_private;
 927         void **private1;
 928
 929         buf = talloc_strdup(NULL, "");
 930
 931         if (buf == NULL) {
 932                 DEBUG(0, ("Failed to allocate memory for reading the input "
 933                           "buffer.\n"));
 934                 x_fprintf(x_stdout, "ERR\n");
 935                 return;
 936         }
 937
 938         do {
 939                 /* this is not a typo - x_fgets doesn't work too well under
 940                  * squid */
 941                 if (fgets(tmp, INITIAL_BUFFER_SIZE, stdin) == NULL) {
 942                         if (ferror(stdin)) {
 943                                 DEBUG(1, ("fgets() failed! dying..... errno=%d "
 944                                           "(%s)\n", ferror(stdin),
 945                                           strerror(ferror(stdin))));
 946
 947                                 exit(1);    /* BIIG buffer */
 948                         }
 949                         exit(0);
 950                 }
 951
 952                 buf = talloc_strdup_append_buffer(buf, tmp);
 953                 buf_size += INITIAL_BUFFER_SIZE;
 954
 955                 if (buf_size > MAX_BUFFER_SIZE) {
 956                         DEBUG(0, ("Invalid Request (too large)\n"));
 957                         x_fprintf(x_stdout, "ERR\n");
 958                         talloc_free(buf);
 959                         return;
 960                 }
 961
 962                 c = strchr(buf, '\n');
 963         } while (c == NULL);
 964
 965         *c = '\0';
 966         length = c-buf;
 967
 968         DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
 969
 970         if (buf[0] == '\0') {
 971                 DEBUG(0, ("Invalid Request (empty)\n"));
 972                 x_fprintf(x_stdout, "ERR\n");
 973                 talloc_free(buf);
 974                 return;
 975         }
 976
 977         if (opt_multiplex) {
 978                 if (sscanf(buf, "%u ", &mux_id) != 1) {
 979                         DEBUG(0, ("Invalid Request - no multiplex id\n"));
 980                         x_fprintf(x_stdout, "ERR\n");
 981                         talloc_free(buf);
 982                         return;
 983                 }
 984                 if (!mux_private) {
 985                         mux_private = talloc(NULL, struct mux_private);
 986                         mux_private->max_mux = 0;
 987                         mux_private->private_pointers = NULL;
 988                 }
 989
 990                 c=strchr(buf,' ');
 991                 if (!c) {
 992                         DEBUG(0, ("Invalid Request - no data after multiplex id\n"));
 993                         x_fprintf(x_stdout, "ERR\n");
 994                         talloc_free(buf);
 995                         return;
 996                 }
 997                 c++;
 998                 if (mux_id >= mux_private->max_mux) {
 999                         unsigned int prev_max = mux_private->max_mux;
1000                         mux_private->max_mux = mux_id + 1;
1001                         mux_private->private_pointers
1002                                 = talloc_realloc(mux_private,
1003                                                    mux_private->private_pointers,
1004                                                    void *, mux_private->max_mux);
1005                         memset(&mux_private->private_pointers[prev_max], '\0',
1006                                (sizeof(*mux_private->private_pointers) * (mux_private->max_mux - prev_max)));
1007                 };
1008
1009                 private1 = &mux_private->private_pointers[mux_id];
1010         } else {
1011                 c = buf;
1012                 private1 = &normal_private;
1013         }
1014
1015         fn(helper_mode, lp_ctx, c, length, private1, mux_id, private2);
1016         talloc_free(buf);
1017 }
1018
1019 static void squid_stream(struct loadparm_context *lp_ctx,
1020                          enum stdio_helper_mode stdio_mode,
1021                          stdio_helper_function fn) {
1022         /* initialize FDescs */
1023         x_setbuf(x_stdout, NULL);
1024         x_setbuf(x_stderr, NULL);
1025         while(1) {
1026                 manage_squid_request(lp_ctx, stdio_mode, fn, NULL);
1027         }
1028 }
1029
1030
1031 /* Main program */
1032
1033 enum {
1034         OPT_USERNAME = 1000,
1035         OPT_DOMAIN,
1036         OPT_WORKSTATION,
1037         OPT_CHALLENGE,
1038         OPT_RESPONSE,
1039         OPT_LM,
1040         OPT_NT,
1041         OPT_PASSWORD,
1042         OPT_LM_KEY,
1043         OPT_USER_SESSION_KEY,
1044         OPT_DIAGNOSTICS,
1045         OPT_REQUIRE_MEMBERSHIP,
1046         OPT_MULTIPLEX,
1047         OPT_USE_CACHED_CREDS,
1048 };
1049
1050 int main(int argc, const char **argv)
1051 {
1052         static const char *helper_protocol;
1053         int opt;
1054
1055         poptContext pc;
1056
1057         /* NOTE: DO NOT change this interface without considering the implications!
1058            This is an external interface, which other programs will use to interact
1059            with this helper.
1060         */
1061
1062         /* We do not use single-letter command abbreviations, because they harm future
1063            interface stability. */
1064
1065         struct poptOption long_options[] = {
1066                 POPT_AUTOHELP
1067                 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
1068                 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
1069                 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
1070                 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"},
1071                 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
1072                 { "multiplex", 0, POPT_ARG_NONE, &opt_multiplex, OPT_MULTIPLEX, "Multiplex Mode"},
1073                 { "use-cached-creds", 0, POPT_ARG_NONE, &use_cached_creds, OPT_USE_CACHED_CREDS, "silently ignored for compatibility reasons"},
1074                 POPT_COMMON_SAMBA
1075                 POPT_COMMON_VERSION
1076                 { NULL }
1077         };
1078
1079         /* Samba client initialisation */
1080
1081         setup_logging(NULL, DEBUG_STDERR);
1082
1083         /* Parse options */
1084
1085         pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
1086
1087         /* Parse command line options */
1088
1089         if (argc == 1) {
1090                 poptPrintHelp(pc, stderr, 0);
1091                 return 1;
1092         }
1093
1094         pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
1095                             POPT_CONTEXT_KEEP_FIRST);
1096
1097         while((opt = poptGetNextOpt(pc)) != -1) {
1098                 if (opt < -1) {
1099                         break;
1100                 }
1101         }
1102         if (opt < -1) {
1103                 fprintf(stderr, "%s: %s\n",
1104                         poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1105                         poptStrerror(opt));
1106                 return 1;
1107         }
1108
1109         gensec_init();
1110
1111         if (opt_domain == NULL) {
1112                 opt_domain = lpcfg_workgroup(cmdline_lp_ctx);
1113         }
1114
1115         if (helper_protocol) {
1116                 int i;
1117                 for (i=0; i<NUM_HELPER_MODES; i++) {
1118                         if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
1119                                 squid_stream(cmdline_lp_ctx, stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
1120                                 exit(0);
1121                         }
1122                 }
1123                 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
1124
1125                 for (i=0; i<NUM_HELPER_MODES; i++) {
1126                         x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
1127                 }
1128
1129                 exit(1);
1130         }
1131
1132         if (!opt_username) {
1133                 x_fprintf(x_stderr, "username must be specified!\n\n");
1134                 poptPrintHelp(pc, stderr, 0);
1135                 exit(1);
1136         }
1137
1138         if (opt_workstation == NULL) {
1139                 opt_workstation = lpcfg_netbios_name(cmdline_lp_ctx);
1140         }
1141
1142         if (!opt_password) {
1143                 char pwd[256] = {0};
1144                 int rc;
1145
1146                 rc = samba_getpass("Password: ", pwd, sizeof(pwd), false, false);
1147                 if (rc == 0) {
1148                         opt_password = smb_xstrdup(pwd);
1149                 }
1150         }
1151
1152         {
1153                 char *user;
1154
1155                 if (asprintf(&user, "%s%c%s", opt_domain,
1156                              *lpcfg_winbind_separator(cmdline_lp_ctx),
1157                              opt_username) < 0) {
1158                         return 1;
1159                 }
1160                 if (!check_plaintext_auth(user, opt_password, true)) {
1161                         return 1;
1162                 }
1163         }
1164
1165         /* Exit code */
1166
1167         poptFreeContext(pc);
1168         return 0;
1169 }