source4/utils/ntlm_auth.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind status program.
   5
   6    Copyright (C) Tim Potter      2000-2003
   7    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003-2004
   8    Copyright (C) Francesco Chemolli <kinkie@kame.usr.dsi.unimi.it> 2000
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "system/filesys.h"
  26 #include "lib/cmdline/popt_common.h"
  27 #include "lib/ldb/include/ldb.h"
  28 #include "auth/credentials/credentials.h"
  29 #include "auth/gensec/gensec.h"
  30 #include "auth/auth.h"
  31 #include "librpc/gen_ndr/ndr_netlogon.h"
  32 #include "auth/auth_sam.h"
  33 #include "auth/ntlm/ntlm_check.h"
  34 #include "pstring.h"
  35 #include "libcli/auth/libcli_auth.h"
  36 #include "libcli/security/security.h"
  37 #include "lib/events/events.h"
  38 #include "lib/messaging/messaging.h"
  39 #include "lib/messaging/irpc.h"
  40 #include "auth/ntlmssp/ntlmssp.h"
  41 #include "param/param.h"
  42
  43 #define INITIAL_BUFFER_SIZE 300
  44 #define MAX_BUFFER_SIZE 63000
  45
  46 enum stdio_helper_mode {
  47         SQUID_2_4_BASIC,
  48         SQUID_2_5_BASIC,
  49         SQUID_2_5_NTLMSSP,
  50         NTLMSSP_CLIENT_1,
  51         GSS_SPNEGO_CLIENT,
  52         GSS_SPNEGO_SERVER,
  53         NTLM_SERVER_1,
  54         NUM_HELPER_MODES
  55 };
  56
  57 #define NTLM_AUTH_FLAG_USER_SESSION_KEY     0x0004
  58 #define NTLM_AUTH_FLAG_LMKEY                0x0008
  59
  60
  61 typedef void (*stdio_helper_function)(enum stdio_helper_mode stdio_helper_mode,
  62                                       struct loadparm_context *lp_ctx,
  63                                       char *buf, int length, void **private,
  64                                       unsigned int mux_id, void **private2);
  65
  66 static void manage_squid_basic_request (enum stdio_helper_mode stdio_helper_mode,
  67                                         struct loadparm_context *lp_ctx,
  68                                         char *buf, int length, void **private,
  69                                         unsigned int mux_id, void **private2);
  70
  71 static void manage_gensec_request (enum stdio_helper_mode stdio_helper_mode,
  72                                    struct loadparm_context *lp_ctx,
  73                                    char *buf, int length, void **private,
  74                                    unsigned int mux_id, void **private2);
  75
  76 static void manage_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode,
  77                                           struct loadparm_context *lp_ctx,
  78                                           char *buf, int length, void **private,
  79                                           unsigned int mux_id, void **private2);
  80
  81 static void manage_squid_request(struct loadparm_context *lp_ctx,
  82                                  enum stdio_helper_mode helper_mode,
  83                                  stdio_helper_function fn, void **private2);
  84
  85 static const struct {
  86         enum stdio_helper_mode mode;
  87         const char *name;
  88         stdio_helper_function fn;
  89 } stdio_helper_protocols[] = {
  90         { SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
  91         { SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
  92         { SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request},
  93         { GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request},
  94         { GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request},
  95         { NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request},
  96         { NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
  97         { NUM_HELPER_MODES, NULL, NULL}
  98 };
  99
 100 extern int winbindd_fd;
 101
 102 static const char *opt_username;
 103 static const char *opt_domain;
 104 static const char *opt_workstation;
 105 static const char *opt_password;
 106 static int opt_multiplex;
 107 static int use_cached_creds;
 108
 109
 110 static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
 111
 112 static void mux_printf(unsigned int mux_id, const char *format, ...)
 113 {
 114         va_list ap;
 115
 116         if (opt_multiplex) {
 117                 x_fprintf(x_stdout, "%d ", mux_id);
 118         }
 119
 120         va_start(ap, format);
 121         x_vfprintf(x_stdout, format, ap);
 122         va_end(ap);
 123 }
 124
 125
 126
 127 /* Copy of parse_domain_user from winbindd_util.c.  Parse a string of the
 128    form DOMAIN/user into a domain and a user */
 129
 130 static bool parse_ntlm_auth_domain_user(const char *domuser, fstring domain,
 131                                         fstring user, char winbind_separator)
 132 {
 133
 134         char *p = strchr(domuser, winbind_separator);
 135
 136         if (!p) {
 137                 return false;
 138         }
 139
 140         fstrcpy(user, p+1);
 141         fstrcpy(domain, domuser);
 142         domain[PTR_DIFF(p, domuser)] = 0;
 143
 144         return true;
 145 }
 146
 147 /**
 148  * Decode a base64 string into a DATA_BLOB - simple and slow algorithm
 149  **/
 150 static DATA_BLOB base64_decode_data_blob(TALLOC_CTX *mem_ctx, const char *s)
 151 {
 152         DATA_BLOB ret = data_blob_talloc(mem_ctx, s, strlen(s)+1);
 153         ret.length = ldb_base64_decode((char *)ret.data);
 154         return ret;
 155 }
 156
 157 /**
 158  * Encode a base64 string into a talloc()ed string caller to free.
 159  **/
 160 static char *base64_encode_data_blob(TALLOC_CTX *mem_ctx, DATA_BLOB data)
 161 {
 162         return ldb_base64_encode(mem_ctx, (const char *)data.data, data.length);
 163 }
 164
 165 /**
 166  * Decode a base64 string in-place - wrapper for the above
 167  **/
 168 static void base64_decode_inplace(char *s)
 169 {
 170         ldb_base64_decode(s);
 171 }
 172
 173
 174
 175 /* Authenticate a user with a plaintext password */
 176
 177 static bool check_plaintext_auth(const char *user, const char *pass,
 178                                  bool stdout_diagnostics)
 179 {
 180         return (strcmp(pass, opt_password) == 0);
 181 }
 182
 183 /* authenticate a user with an encrypted username/password */
 184
 185 static NTSTATUS local_pw_check_specified(struct loadparm_context *lp_ctx,
 186                                          const char *username,
 187                                          const char *domain,
 188                                          const char *workstation,
 189                                          const DATA_BLOB *challenge,
 190                                          const DATA_BLOB *lm_response,
 191                                          const DATA_BLOB *nt_response,
 192                                          uint32_t flags,
 193                                          DATA_BLOB *lm_session_key,
 194                                          DATA_BLOB *user_session_key,
 195                                          char **error_string,
 196                                          char **unix_name)
 197 {
 198         NTSTATUS nt_status;
 199         struct samr_Password lm_pw, nt_pw;
 200         struct samr_Password *lm_pwd, *nt_pwd;
 201         TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
 202         if (!mem_ctx) {
 203                 nt_status = NT_STATUS_NO_MEMORY;
 204         } else {
 205
 206                 E_md4hash(opt_password, nt_pw.hash);
 207                 if (E_deshash(opt_password, lm_pw.hash)) {
 208                         lm_pwd = &lm_pw;
 209                 } else {
 210                         lm_pwd = NULL;
 211                 }
 212                 nt_pwd = &nt_pw;
 213
 214
 215                 nt_status = ntlm_password_check(mem_ctx,
 216                                                 lp_ctx,
 217                                                 MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT |
 218                                                 MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
 219                                                 challenge,
 220                                                 lm_response,
 221                                                 nt_response,
 222                                                 username,
 223                                                 username,
 224                                                 domain,
 225                                                 lm_pwd, nt_pwd, user_session_key, lm_session_key);
 226
 227                 if (NT_STATUS_IS_OK(nt_status)) {
 228                         if (unix_name) {
 229                                 asprintf(unix_name,
 230                                          "%s%c%s", domain,
 231                                          *lp_winbind_separator(lp_ctx),
 232                                          username);
 233                         }
 234                 } else {
 235                         DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
 236                                   domain, username, workstation,
 237                                   nt_errstr(nt_status)));
 238                 }
 239                 talloc_free(mem_ctx);
 240         }
 241         if (error_string) {
 242                 *error_string = strdup(nt_errstr(nt_status));
 243         }
 244         return nt_status;
 245
 246
 247 }
 248
 249 static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode,
 250                                        struct loadparm_context *lp_ctx,
 251                                        char *buf, int length, void **private,
 252                                        unsigned int mux_id, void **private2)
 253 {
 254         char *user, *pass;
 255         user=buf;
 256
 257         pass = memchr(buf, ' ', length);
 258         if (!pass) {
 259                 DEBUG(2, ("Password not found. Denying access\n"));
 260                 mux_printf(mux_id, "ERR\n");
 261                 return;
 262         }
 263         *pass='\0';
 264         pass++;
 265
 266         if (stdio_helper_mode == SQUID_2_5_BASIC) {
 267                 rfc1738_unescape(user);
 268                 rfc1738_unescape(pass);
 269         }
 270
 271         if (check_plaintext_auth(user, pass, false)) {
 272                 mux_printf(mux_id, "OK\n");
 273         } else {
 274                 mux_printf(mux_id, "ERR\n");
 275         }
 276 }
 277
 278 /* This is a bit hairy, but the basic idea is to do a password callback
 279    to the calling application.  The callback comes from within gensec */
 280
 281 static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode,
 282                                          struct loadparm_context *lp_ctx,
 283                                          char *buf, int length, void **private,
 284                                          unsigned int mux_id, void **password)
 285 {
 286         DATA_BLOB in;
 287         if (strlen(buf) < 2) {
 288                 DEBUG(1, ("query [%s] invalid", buf));
 289                 mux_printf(mux_id, "BH Query invalid\n");
 290                 return;
 291         }
 292
 293         if (strlen(buf) > 3) {
 294                 in = base64_decode_data_blob(NULL, buf + 3);
 295         } else {
 296                 in = data_blob(NULL, 0);
 297         }
 298
 299         if (strncmp(buf, "PW ", 3) == 0) {
 300
 301                 *password = talloc_strndup(*private /* hopefully the right gensec context, useful to use for talloc */,
 302                                            (const char *)in.data, in.length);
 303
 304                 if (*password == NULL) {
 305                         DEBUG(1, ("Out of memory\n"));
 306                         mux_printf(mux_id, "BH Out of memory\n");
 307                         data_blob_free(&in);
 308                         return;
 309                 }
 310
 311                 mux_printf(mux_id, "OK\n");
 312                 data_blob_free(&in);
 313                 return;
 314         }
 315         DEBUG(1, ("Asked for (and expected) a password\n"));
 316         mux_printf(mux_id, "BH Expected a password\n");
 317         data_blob_free(&in);
 318 }
 319
 320 /**
 321  * Callback for password credentials.  This is not async, and when
 322  * GENSEC and the credentials code is made async, it will look rather
 323  * different.
 324  */
 325
 326 static const char *get_password(struct cli_credentials *credentials)
 327 {
 328         char *password = NULL;
 329
 330         /* Ask for a password */
 331         mux_printf((unsigned int)(uintptr_t)credentials->priv_data, "PW\n");
 332         credentials->priv_data = NULL;
 333
 334         manage_squid_request(cmdline_lp_ctx, NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, (void **)&password);
 335         return password;
 336 }
 337
 338 /**
 339  Check if a string is part of a list.
 340 **/
 341 static bool in_list(const char *s, const char *list, bool casesensitive)
 342 {
 343         char *tok;
 344         size_t tok_len = 1024;
 345         const char *p=list;
 346
 347         if (!list)
 348                 return false;
 349
 350         tok = (char *)malloc(tok_len);
 351         if (!tok) {
 352                 return false;
 353         }
 354
 355         while (next_token(&p, tok, LIST_SEP, tok_len)) {
 356                 if ((casesensitive?strcmp:strcasecmp_m)(tok,s) == 0) {
 357                         free(tok);
 358                         return true;
 359                 }
 360         }
 361         free(tok);
 362         return false;
 363 }
 364
 365 static void gensec_want_feature_list(struct gensec_security *state, char* feature_list)
 366 {
 367         if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list, true)) {
 368                 DEBUG(10, ("want GENSEC_FEATURE_SESSION_KEY\n"));
 369                 gensec_want_feature(state, GENSEC_FEATURE_SESSION_KEY);
 370         }
 371         if (in_list("NTLMSSP_FEATURE_SIGN", feature_list, true)) {
 372                 DEBUG(10, ("want GENSEC_FEATURE_SIGN\n"));
 373                 gensec_want_feature(state, GENSEC_FEATURE_SIGN);
 374         }
 375         if (in_list("NTLMSSP_FEATURE_SEAL", feature_list, true)) {
 376                 DEBUG(10, ("want GENSEC_FEATURE_SEAL\n"));
 377                 gensec_want_feature(state, GENSEC_FEATURE_SEAL);
 378         }
 379 }
 380
 381 static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode,
 382                                   struct loadparm_context *lp_ctx,
 383                                   char *buf, int length, void **private,
 384                                   unsigned int mux_id, void **private2)
 385 {
 386         DATA_BLOB in;
 387         DATA_BLOB out = data_blob(NULL, 0);
 388         char *out_base64 = NULL;
 389         const char *reply_arg = NULL;
 390         struct gensec_ntlm_state {
 391                 struct gensec_security *gensec_state;
 392                 const char *set_password;
 393         };
 394         struct gensec_ntlm_state *state;
 395         struct event_context *ev;
 396         struct messaging_context *msg;
 397
 398         NTSTATUS nt_status;
 399         bool first = false;
 400         const char *reply_code;
 401         struct cli_credentials *creds;
 402
 403         static char *want_feature_list = NULL;
 404         static DATA_BLOB session_key;
 405
 406         TALLOC_CTX *mem_ctx;
 407
 408         if (*private) {
 409                 state = (struct gensec_ntlm_state *)*private;
 410         } else {
 411                 state = talloc_zero(NULL, struct gensec_ntlm_state);
 412                 if (!state) {
 413                         mux_printf(mux_id, "BH No Memory\n");
 414                         exit(1);
 415                 }
 416                 *private = state;
 417                 if (opt_password) {
 418                         state->set_password = opt_password;
 419                 }
 420         }
 421
 422         if (strlen(buf) < 2) {
 423                 DEBUG(1, ("query [%s] invalid", buf));
 424                 mux_printf(mux_id, "BH Query invalid\n");
 425                 return;
 426         }
 427
 428         if (strlen(buf) > 3) {
 429                 if(strncmp(buf, "SF ", 3) == 0) {
 430                         DEBUG(10, ("Setting flags to negotiate\n"));
 431                         talloc_free(want_feature_list);
 432                         want_feature_list = talloc_strndup(state, buf+3, strlen(buf)-3);
 433                         mux_printf(mux_id, "OK\n");
 434                         return;
 435                 }
 436                 in = base64_decode_data_blob(NULL, buf + 3);
 437         } else {
 438                 in = data_blob(NULL, 0);
 439         }
 440
 441         if (strncmp(buf, "YR", 2) == 0) {
 442                 if (state->gensec_state) {
 443                         talloc_free(state->gensec_state);
 444                         state->gensec_state = NULL;
 445                 }
 446         } else if ( (strncmp(buf, "OK", 2) == 0)) {
 447                 /* Just return BH, like ntlm_auth from Samba 3 does. */
 448                 mux_printf(mux_id, "BH Command expected\n");
 449                 data_blob_free(&in);
 450                 return;
 451         } else if ( (strncmp(buf, "TT ", 3) != 0) &&
 452                     (strncmp(buf, "KK ", 3) != 0) &&
 453                     (strncmp(buf, "AF ", 3) != 0) &&
 454                     (strncmp(buf, "NA ", 3) != 0) &&
 455                     (strncmp(buf, "UG", 2) != 0) &&
 456                     (strncmp(buf, "PW ", 3) != 0) &&
 457                     (strncmp(buf, "GK", 2) != 0) &&
 458                     (strncmp(buf, "GF", 2) != 0)) {
 459                 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
 460                 mux_printf(mux_id, "BH SPNEGO request invalid\n");
 461                 data_blob_free(&in);
 462                 return;
 463         }
 464
 465         ev = s4_event_context_init(state);
 466         if (!ev) {
 467                 exit(1);
 468         }
 469         /* setup gensec */
 470         if (!(state->gensec_state)) {
 471                 switch (stdio_helper_mode) {
 472                 case GSS_SPNEGO_CLIENT:
 473                 case NTLMSSP_CLIENT_1:
 474                         /* setup the client side */
 475
 476                         nt_status = gensec_client_start(NULL, &state->gensec_state, ev, lp_ctx);
 477                         if (!NT_STATUS_IS_OK(nt_status)) {
 478                                 exit(1);
 479                         }
 480
 481                         break;
 482                 case GSS_SPNEGO_SERVER:
 483                 case SQUID_2_5_NTLMSSP:
 484                         msg = messaging_client_init(state, lp_messaging_path(state, lp_ctx),
 485                                                     lp_iconv_convenience(lp_ctx), ev);
 486                         if (!msg) {
 487                                 exit(1);
 488                         }
 489                         if (!NT_STATUS_IS_OK(gensec_server_start(state, ev, lp_ctx, msg, &state->gensec_state))) {
 490                                 exit(1);
 491                         }
 492                         break;
 493                 default:
 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                         abort();
 545                 }
 546
 547                 if (!NT_STATUS_IS_OK(nt_status)) {
 548                         DEBUG(1, ("GENSEC mech failed to start: %s\n", nt_errstr(nt_status)));
 549                         mux_printf(mux_id, "BH GENSEC mech failed to start\n");
 550                         return;
 551                 }
 552
 553         }
 554
 555         /* update */
 556         mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");
 557
 558         if (strncmp(buf, "PW ", 3) == 0) {
 559                 state->set_password = talloc_strndup(state,
 560                                                      (const char *)in.data,
 561                                                      in.length);
 562
 563                 cli_credentials_set_password(gensec_get_credentials(state->gensec_state),
 564                                              state->set_password,
 565                                              CRED_SPECIFIED);
 566                 mux_printf(mux_id, "OK\n");
 567                 data_blob_free(&in);
 568                 talloc_free(mem_ctx);
 569                 return;
 570         }
 571
 572         if (strncmp(buf, "UG", 2) == 0) {
 573                 int i;
 574                 char *grouplist = NULL;
 575                 struct auth_session_info *session_info;
 576
 577                 nt_status = gensec_session_info(state->gensec_state, &session_info);
 578                 if (!NT_STATUS_IS_OK(nt_status)) {
 579                         DEBUG(1, ("gensec_session_info failed: %s\n", nt_errstr(nt_status)));
 580                         mux_printf(mux_id, "BH %s\n", nt_errstr(nt_status));
 581                         data_blob_free(&in);
 582                         talloc_free(mem_ctx);
 583                         return;
 584                 }
 585
 586                 /* get the string onto the context */
 587                 grouplist = talloc_strdup(mem_ctx, "");
 588
 589                 for (i=0; i<session_info->security_token->num_sids; i++) {
 590                         struct security_token *token = session_info->security_token;
 591                         const char *sidstr = dom_sid_string(session_info,
 592                                                             token->sids[i]);
 593                         grouplist = talloc_asprintf_append_buffer(grouplist, "%s,", sidstr);
 594                 }
 595
 596                 mux_printf(mux_id, "GL %s\n", grouplist);
 597                 talloc_free(session_info);
 598                 data_blob_free(&in);
 599                 talloc_free(mem_ctx);
 600                 return;
 601         }
 602
 603         if (strncmp(buf, "GK", 2) == 0) {
 604                 char *base64_key;
 605                 DEBUG(10, ("Requested session key\n"));
 606                 nt_status = gensec_session_key(state->gensec_state, &session_key);
 607                 if(!NT_STATUS_IS_OK(nt_status)) {
 608                         DEBUG(1, ("gensec_session_key failed: %s\n", nt_errstr(nt_status)));
 609                         mux_printf(mux_id, "BH No session key\n");
 610                         talloc_free(mem_ctx);
 611                         return;
 612                 } else {
 613                         base64_key = base64_encode_data_blob(state, session_key);
 614                         mux_printf(mux_id, "GK %s\n", base64_key);
 615                         talloc_free(base64_key);
 616                 }
 617                 talloc_free(mem_ctx);
 618                 return;
 619         }
 620
 621         if (strncmp(buf, "GF", 2) == 0) {
 622                 struct gensec_ntlmssp_state *gensec_ntlmssp_state;
 623                 uint32_t neg_flags;
 624
 625                 gensec_ntlmssp_state = talloc_get_type(state->gensec_state->private_data,
 626                                 struct gensec_ntlmssp_state);
 627                 neg_flags = gensec_ntlmssp_state->neg_flags;
 628
 629                 DEBUG(10, ("Requested negotiated feature flags\n"));
 630                 mux_printf(mux_id, "GF 0x%08x\n", neg_flags);
 631                 return;
 632         }
 633
 634         nt_status = gensec_update(state->gensec_state, mem_ctx, in, &out);
 635
 636         /* don't leak 'bad password'/'no such user' info to the network client */
 637         nt_status = auth_nt_status_squash(nt_status);
 638
 639         if (out.length) {
 640                 out_base64 = base64_encode_data_blob(mem_ctx, out);
 641         } else {
 642                 out_base64 = NULL;
 643         }
 644
 645         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 646                 reply_arg = "*";
 647                 if (first) {
 648                         reply_code = "YR";
 649                 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
 650                         reply_code = "KK";
 651                 } else if (state->gensec_state->gensec_role == GENSEC_SERVER) {
 652                         reply_code = "TT";
 653                 } else {
 654                         abort();
 655                 }
 656
 657
 658         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
 659                 reply_code = "BH NT_STATUS_ACCESS_DENIED";
 660                 reply_arg = nt_errstr(nt_status);
 661                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 662         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
 663                 reply_code = "BH NT_STATUS_UNSUCCESSFUL";
 664                 reply_arg = nt_errstr(nt_status);
 665                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 666         } else if (!NT_STATUS_IS_OK(nt_status)) {
 667                 reply_code = "NA";
 668                 reply_arg = nt_errstr(nt_status);
 669                 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
 670         } else if /* OK */ (state->gensec_state->gensec_role == GENSEC_SERVER) {
 671                 struct auth_session_info *session_info;
 672
 673                 nt_status = gensec_session_info(state->gensec_state, &session_info);
 674                 if (!NT_STATUS_IS_OK(nt_status)) {
 675                         reply_code = "BH Failed to retrive session info";
 676                         reply_arg = nt_errstr(nt_status);
 677                         DEBUG(1, ("GENSEC failed to retreive the session info: %s\n", nt_errstr(nt_status)));
 678                 } else {
 679
 680                         reply_code = "AF";
 681                         reply_arg = talloc_asprintf(state->gensec_state,
 682                                                     "%s%s%s", session_info->server_info->domain_name,
 683                                                     lp_winbind_separator(lp_ctx), session_info->server_info->account_name);
 684                         talloc_free(session_info);
 685                 }
 686         } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
 687                 reply_code = "AF";
 688                 reply_arg = out_base64;
 689         } else {
 690                 abort();
 691         }
 692
 693         switch (stdio_helper_mode) {
 694         case GSS_SPNEGO_SERVER:
 695                 mux_printf(mux_id, "%s %s %s\n", reply_code,
 696                           out_base64 ? out_base64 : "*",
 697                           reply_arg ? reply_arg : "*");
 698                 break;
 699         default:
 700                 if (out_base64) {
 701                         mux_printf(mux_id, "%s %s\n", reply_code, out_base64);
 702                 } else if (reply_arg) {
 703                         mux_printf(mux_id, "%s %s\n", reply_code, reply_arg);
 704                 } else {
 705                         mux_printf(mux_id, "%s\n", reply_code);
 706                 }
 707         }
 708
 709         talloc_free(mem_ctx);
 710         return;
 711 }
 712
 713 static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
 714                                          struct loadparm_context *lp_ctx,
 715                                          char *buf, int length, void **private,
 716                                          unsigned int mux_id, void **private2)
 717 {
 718         char *request, *parameter;
 719         static DATA_BLOB challenge;
 720         static DATA_BLOB lm_response;
 721         static DATA_BLOB nt_response;
 722         static char *full_username;
 723         static char *username;
 724         static char *domain;
 725         static char *plaintext_password;
 726         static bool ntlm_server_1_user_session_key;
 727         static bool ntlm_server_1_lm_session_key;
 728
 729         if (strequal(buf, ".")) {
 730                 if (!full_username && !username) {
 731                         mux_printf(mux_id, "Error: No username supplied!\n");
 732                 } else if (plaintext_password) {
 733                         /* handle this request as plaintext */
 734                         if (!full_username) {
 735                                 if (asprintf(&full_username, "%s%c%s", domain, *lp_winbind_separator(lp_ctx), username) == -1) {
 736                                         mux_printf(mux_id, "Error: Out of memory in asprintf!\n.\n");
 737                                         return;
 738                                 }
 739                         }
 740                         if (check_plaintext_auth(full_username, plaintext_password, false)) {
 741                                 mux_printf(mux_id, "Authenticated: Yes\n");
 742                         } else {
 743                                 mux_printf(mux_id, "Authenticated: No\n");
 744                         }
 745                 } else if (!lm_response.data && !nt_response.data) {
 746                         mux_printf(mux_id, "Error: No password supplied!\n");
 747                 } else if (!challenge.data) {
 748                         mux_printf(mux_id, "Error: No lanman-challenge supplied!\n");
 749                 } else {
 750                         char *error_string = NULL;
 751                         DATA_BLOB lm_key;
 752                         DATA_BLOB user_session_key;
 753                         uint32_t flags = 0;
 754
 755                         if (full_username && !username) {
 756                                 fstring fstr_user;
 757                                 fstring fstr_domain;
 758
 759                                 if (!parse_ntlm_auth_domain_user(full_username, fstr_user, fstr_domain,
 760                                                                  *lp_winbind_separator(lp_ctx))) {
 761                                         /* username might be 'tainted', don't print into our new-line deleimianted stream */
 762                                         mux_printf(mux_id, "Error: Could not parse into domain and username\n");
 763                                 }
 764                                 SAFE_FREE(username);
 765                                 SAFE_FREE(domain);
 766                                 username = smb_xstrdup(fstr_user);
 767                                 domain = smb_xstrdup(fstr_domain);
 768                         }
 769
 770                         if (!domain) {
 771                                 domain = smb_xstrdup(lp_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                                                               lp_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(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(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(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 **private;
 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                 private = &mux_private->private_pointers[mux_id];
1010         } else {
1011                 c = buf;
1012                 private = &normal_private;
1013         }
1014
1015         fn(helper_mode, lp_ctx, c, length, private, 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(cmdline_lp_ctx);
1110
1111         if (opt_domain == NULL) {
1112                 opt_domain = lp_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 = lp_netbios_name(cmdline_lp_ctx);
1140         }
1141
1142         if (!opt_password) {
1143                 opt_password = getpass("password: ");
1144         }
1145
1146         {
1147                 char *user;
1148
1149                 asprintf(&user, "%s%c%s", opt_domain, *lp_winbind_separator(cmdline_lp_ctx), opt_username);
1150                 if (!check_plaintext_auth(user, opt_password, true)) {
1151                         return 1;
1152                 }
1153         }
1154
1155         /* Exit code */
1156
1157         poptFreeContext(pc);
1158         return 0;
1159 }