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