source3/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    Copyright (C) Robert O'Callahan 2006 (added cached credential code).
  10    Copyright (C) Kai Blin <kai@samba.org> 2008
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 3 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  24 */
  25
  26 #include "includes.h"
  27 #include "popt_common.h"
  28 #include "utils/ntlm_auth.h"
  29 #include "../libcli/auth/libcli_auth.h"
  30 #include "../libcli/auth/spnego.h"
  31 #include "../auth/ntlmssp/ntlmssp.h"
  32 #include "smb_krb5.h"
  33 #include <iniparser.h>
  34 #include "../lib/crypto/arcfour.h"
  35 #include "libads/kerberos_proto.h"
  36 #include "nsswitch/winbind_client.h"
  37 #include "librpc/gen_ndr/krb5pac.h"
  38 #include "../lib/util/asn1.h"
  39
  40 #ifndef PAM_WINBIND_CONFIG_FILE
  41 #define PAM_WINBIND_CONFIG_FILE "/etc/security/pam_winbind.conf"
  42 #endif
  43
  44 #define WINBIND_KRB5_AUTH       0x00000080
  45
  46 #undef DBGC_CLASS
  47 #define DBGC_CLASS DBGC_WINBIND
  48
  49 #define INITIAL_BUFFER_SIZE 300
  50 #define MAX_BUFFER_SIZE 630000
  51
  52 enum stdio_helper_mode {
  53         SQUID_2_4_BASIC,
  54         SQUID_2_5_BASIC,
  55         SQUID_2_5_NTLMSSP,
  56         NTLMSSP_CLIENT_1,
  57         GSS_SPNEGO,
  58         GSS_SPNEGO_CLIENT,
  59         NTLM_SERVER_1,
  60         NTLM_CHANGE_PASSWORD_1,
  61         NUM_HELPER_MODES
  62 };
  63
  64 enum ntlm_auth_cli_state {
  65         CLIENT_INITIAL = 0,
  66         CLIENT_RESPONSE,
  67         CLIENT_FINISHED,
  68         CLIENT_ERROR
  69 };
  70
  71 enum ntlm_auth_svr_state {
  72         SERVER_INITIAL = 0,
  73         SERVER_CHALLENGE,
  74         SERVER_FINISHED,
  75         SERVER_ERROR
  76 };
  77
  78 struct ntlm_auth_state {
  79         TALLOC_CTX *mem_ctx;
  80         enum stdio_helper_mode helper_mode;
  81         enum ntlm_auth_cli_state cli_state;
  82         enum ntlm_auth_svr_state svr_state;
  83         struct ntlmssp_state *ntlmssp_state;
  84         uint32_t neg_flags;
  85         char *want_feature_list;
  86         char *spnego_mech;
  87         char *spnego_mech_oid;
  88         bool have_session_key;
  89         DATA_BLOB session_key;
  90         DATA_BLOB initial_message;
  91 };
  92
  93 typedef void (*stdio_helper_function)(struct ntlm_auth_state *state, char *buf,
  94                                         int length);
  95
  96 static void manage_squid_basic_request (struct ntlm_auth_state *state,
  97                                         char *buf, int length);
  98
  99 static void manage_squid_ntlmssp_request (struct ntlm_auth_state *state,
 100                                         char *buf, int length);
 101
 102 static void manage_client_ntlmssp_request (struct ntlm_auth_state *state,
 103                                         char *buf, int length);
 104
 105 static void manage_gss_spnego_request (struct ntlm_auth_state *state,
 106                                         char *buf, int length);
 107
 108 static void manage_gss_spnego_client_request (struct ntlm_auth_state *state,
 109                                         char *buf, int length);
 110
 111 static void manage_ntlm_server_1_request (struct ntlm_auth_state *state,
 112                                         char *buf, int length);
 113
 114 static void manage_ntlm_change_password_1_request(struct ntlm_auth_state *state,
 115                                         char *buf, int length);
 116
 117 static const struct {
 118         enum stdio_helper_mode mode;
 119         const char *name;
 120         stdio_helper_function fn;
 121 } stdio_helper_protocols[] = {
 122         { SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
 123         { SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
 124         { SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_squid_ntlmssp_request},
 125         { NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_client_ntlmssp_request},
 126         { GSS_SPNEGO, "gss-spnego", manage_gss_spnego_request},
 127         { GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gss_spnego_client_request},
 128         { NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
 129         { NTLM_CHANGE_PASSWORD_1, "ntlm-change-password-1", manage_ntlm_change_password_1_request},
 130         { NUM_HELPER_MODES, NULL, NULL}
 131 };
 132
 133 const char *opt_username;
 134 const char *opt_domain;
 135 const char *opt_workstation;
 136 const char *opt_password;
 137 static DATA_BLOB opt_challenge;
 138 static DATA_BLOB opt_lm_response;
 139 static DATA_BLOB opt_nt_response;
 140 static int request_lm_key;
 141 static int request_user_session_key;
 142 static int use_cached_creds;
 143
 144 static const char *require_membership_of;
 145 static const char *require_membership_of_sid;
 146 static const char *opt_pam_winbind_conf;
 147
 148 static char winbind_separator(void)
 149 {
 150         struct winbindd_response response;
 151         static bool got_sep;
 152         static char sep;
 153
 154         if (got_sep)
 155                 return sep;
 156
 157         ZERO_STRUCT(response);
 158
 159         /* Send off request */
 160
 161         if (winbindd_request_response(WINBINDD_INFO, NULL, &response) !=
 162             NSS_STATUS_SUCCESS) {
 163                 d_printf("could not obtain winbind separator!\n");
 164                 return *lp_winbind_separator();
 165         }
 166
 167         sep = response.data.info.winbind_separator;
 168         got_sep = True;
 169
 170         if (!sep) {
 171                 d_printf("winbind separator was NULL!\n");
 172                 return *lp_winbind_separator();
 173         }
 174
 175         return sep;
 176 }
 177
 178 const char *get_winbind_domain(void)
 179 {
 180         struct winbindd_response response;
 181
 182         static fstring winbind_domain;
 183         if (*winbind_domain) {
 184                 return winbind_domain;
 185         }
 186
 187         ZERO_STRUCT(response);
 188
 189         /* Send off request */
 190
 191         if (winbindd_request_response(WINBINDD_DOMAIN_NAME, NULL, &response) !=
 192             NSS_STATUS_SUCCESS) {
 193                 DEBUG(0, ("could not obtain winbind domain name!\n"));
 194                 return lp_workgroup();
 195         }
 196
 197         fstrcpy(winbind_domain, response.data.domain_name);
 198
 199         return winbind_domain;
 200
 201 }
 202
 203 const char *get_winbind_netbios_name(void)
 204 {
 205         struct winbindd_response response;
 206
 207         static fstring winbind_netbios_name;
 208
 209         if (*winbind_netbios_name) {
 210                 return winbind_netbios_name;
 211         }
 212
 213         ZERO_STRUCT(response);
 214
 215         /* Send off request */
 216
 217         if (winbindd_request_response(WINBINDD_NETBIOS_NAME, NULL, &response) !=
 218             NSS_STATUS_SUCCESS) {
 219                 DEBUG(0, ("could not obtain winbind netbios name!\n"));
 220                 return lp_netbios_name();
 221         }
 222
 223         fstrcpy(winbind_netbios_name, response.data.netbios_name);
 224
 225         return winbind_netbios_name;
 226
 227 }
 228
 229 DATA_BLOB get_challenge(void)
 230 {
 231         static DATA_BLOB chal;
 232         if (opt_challenge.length)
 233                 return opt_challenge;
 234
 235         chal = data_blob(NULL, 8);
 236
 237         generate_random_buffer(chal.data, chal.length);
 238         return chal;
 239 }
 240
 241 /* Copy of parse_domain_user from winbindd_util.c.  Parse a string of the
 242    form DOMAIN/user into a domain and a user */
 243
 244 static bool parse_ntlm_auth_domain_user(const char *domuser, fstring domain,
 245                                      fstring user)
 246 {
 247
 248         char *p = strchr(domuser,winbind_separator());
 249
 250         if (!p) {
 251                 return False;
 252         }
 253
 254         fstrcpy(user, p+1);
 255         fstrcpy(domain, domuser);
 256         domain[PTR_DIFF(p, domuser)] = 0;
 257         strupper_m(domain);
 258
 259         return True;
 260 }
 261
 262 static bool get_require_membership_sid(void) {
 263         struct winbindd_request request;
 264         struct winbindd_response response;
 265
 266         if (!require_membership_of) {
 267                 return True;
 268         }
 269
 270         if (require_membership_of_sid) {
 271                 return True;
 272         }
 273
 274         /* Otherwise, ask winbindd for the name->sid request */
 275
 276         ZERO_STRUCT(request);
 277         ZERO_STRUCT(response);
 278
 279         if (!parse_ntlm_auth_domain_user(require_membership_of,
 280                                          request.data.name.dom_name,
 281                                          request.data.name.name)) {
 282                 DEBUG(0, ("Could not parse %s into seperate domain/name parts!\n",
 283                           require_membership_of));
 284                 return False;
 285         }
 286
 287         if (winbindd_request_response(WINBINDD_LOOKUPNAME, &request, &response) !=
 288             NSS_STATUS_SUCCESS) {
 289                 DEBUG(0, ("Winbindd lookupname failed to resolve %s into a SID!\n",
 290                           require_membership_of));
 291                 return False;
 292         }
 293
 294         require_membership_of_sid = SMB_STRDUP(response.data.sid.sid);
 295
 296         if (require_membership_of_sid)
 297                 return True;
 298
 299         return False;
 300 }
 301
 302 /*
 303  * Get some configuration from pam_winbind.conf to see if we
 304  * need to contact trusted domain
 305  */
 306
 307 int get_pam_winbind_config()
 308 {
 309         int ctrl = 0;
 310         dictionary *d = NULL;
 311
 312         if (!opt_pam_winbind_conf || !*opt_pam_winbind_conf) {
 313                 opt_pam_winbind_conf = PAM_WINBIND_CONFIG_FILE;
 314         }
 315
 316         d = iniparser_load(discard_const_p(char, opt_pam_winbind_conf));
 317
 318         if (!d) {
 319                 return 0;
 320         }
 321
 322         if (iniparser_getboolean(d, discard_const_p(char, "global:krb5_auth"), false)) {
 323                 ctrl |= WINBIND_KRB5_AUTH;
 324         }
 325
 326         iniparser_freedict(d);
 327
 328         return ctrl;
 329 }
 330
 331 /* Authenticate a user with a plaintext password */
 332
 333 static bool check_plaintext_auth(const char *user, const char *pass,
 334                                  bool stdout_diagnostics)
 335 {
 336         struct winbindd_request request;
 337         struct winbindd_response response;
 338         NSS_STATUS result;
 339
 340         if (!get_require_membership_sid()) {
 341                 return False;
 342         }
 343
 344         /* Send off request */
 345
 346         ZERO_STRUCT(request);
 347         ZERO_STRUCT(response);
 348
 349         fstrcpy(request.data.auth.user, user);
 350         fstrcpy(request.data.auth.pass, pass);
 351         if (require_membership_of_sid) {
 352                 strlcpy(request.data.auth.require_membership_of_sid,
 353                         require_membership_of_sid,
 354                         sizeof(request.data.auth.require_membership_of_sid));
 355         }
 356
 357         result = winbindd_request_response(WINBINDD_PAM_AUTH, &request, &response);
 358
 359         /* Display response */
 360
 361         if (stdout_diagnostics) {
 362                 if ((result != NSS_STATUS_SUCCESS) && (response.data.auth.nt_status == 0)) {
 363                         d_printf("Reading winbind reply failed! (0x01)\n");
 364                 }
 365
 366                 d_printf("%s: %s (0x%x)\n",
 367                          response.data.auth.nt_status_string,
 368                          response.data.auth.error_string,
 369                          response.data.auth.nt_status);
 370         } else {
 371                 if ((result != NSS_STATUS_SUCCESS) && (response.data.auth.nt_status == 0)) {
 372                         DEBUG(1, ("Reading winbind reply failed! (0x01)\n"));
 373                 }
 374
 375                 DEBUG(3, ("%s: %s (0x%x)\n",
 376                           response.data.auth.nt_status_string,
 377                           response.data.auth.error_string,
 378                           response.data.auth.nt_status));
 379         }
 380
 381         return (result == NSS_STATUS_SUCCESS);
 382 }
 383
 384 /* authenticate a user with an encrypted username/password */
 385
 386 NTSTATUS contact_winbind_auth_crap(const char *username,
 387                                    const char *domain,
 388                                    const char *workstation,
 389                                    const DATA_BLOB *challenge,
 390                                    const DATA_BLOB *lm_response,
 391                                    const DATA_BLOB *nt_response,
 392                                    uint32 flags,
 393                                    uint8 lm_key[8],
 394                                    uint8 user_session_key[16],
 395                                    char **error_string,
 396                                    char **unix_name)
 397 {
 398         NTSTATUS nt_status;
 399         NSS_STATUS result;
 400         struct winbindd_request request;
 401         struct winbindd_response response;
 402
 403         if (!get_require_membership_sid()) {
 404                 return NT_STATUS_INVALID_PARAMETER;
 405         }
 406
 407         ZERO_STRUCT(request);
 408         ZERO_STRUCT(response);
 409
 410         request.flags = flags;
 411
 412         request.data.auth_crap.logon_parameters = MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT | MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT;
 413
 414         if (require_membership_of_sid)
 415                 fstrcpy(request.data.auth_crap.require_membership_of_sid, require_membership_of_sid);
 416
 417         fstrcpy(request.data.auth_crap.user, username);
 418         fstrcpy(request.data.auth_crap.domain, domain);
 419
 420         fstrcpy(request.data.auth_crap.workstation,
 421                 workstation);
 422
 423         memcpy(request.data.auth_crap.chal, challenge->data, MIN(challenge->length, 8));
 424
 425         if (lm_response && lm_response->length) {
 426                 memcpy(request.data.auth_crap.lm_resp,
 427                        lm_response->data,
 428                        MIN(lm_response->length, sizeof(request.data.auth_crap.lm_resp)));
 429                 request.data.auth_crap.lm_resp_len = lm_response->length;
 430         }
 431
 432         if (nt_response && nt_response->length) {
 433                 if (nt_response->length > sizeof(request.data.auth_crap.nt_resp)) {
 434                         request.flags = request.flags | WBFLAG_BIG_NTLMV2_BLOB;
 435                         request.extra_len = nt_response->length;
 436                         request.extra_data.data = SMB_MALLOC_ARRAY(char, request.extra_len);
 437                         if (request.extra_data.data == NULL) {
 438                                 return NT_STATUS_NO_MEMORY;
 439                         }
 440                         memcpy(request.extra_data.data, nt_response->data,
 441                                nt_response->length);
 442
 443                 } else {
 444                         memcpy(request.data.auth_crap.nt_resp,
 445                                nt_response->data, nt_response->length);
 446                 }
 447                 request.data.auth_crap.nt_resp_len = nt_response->length;
 448         }
 449
 450         result = winbindd_request_response(WINBINDD_PAM_AUTH_CRAP, &request, &response);
 451         SAFE_FREE(request.extra_data.data);
 452
 453         /* Display response */
 454
 455         if ((result != NSS_STATUS_SUCCESS) && (response.data.auth.nt_status == 0)) {
 456                 nt_status = NT_STATUS_UNSUCCESSFUL;
 457                 if (error_string)
 458                         *error_string = smb_xstrdup("Reading winbind reply failed!");
 459                 winbindd_free_response(&response);
 460                 return nt_status;
 461         }
 462
 463         nt_status = (NT_STATUS(response.data.auth.nt_status));
 464         if (!NT_STATUS_IS_OK(nt_status)) {
 465                 if (error_string)
 466                         *error_string = smb_xstrdup(response.data.auth.error_string);
 467                 winbindd_free_response(&response);
 468                 return nt_status;
 469         }
 470
 471         if ((flags & WBFLAG_PAM_LMKEY) && lm_key) {
 472                 memcpy(lm_key, response.data.auth.first_8_lm_hash,
 473                        sizeof(response.data.auth.first_8_lm_hash));
 474         }
 475         if ((flags & WBFLAG_PAM_USER_SESSION_KEY) && user_session_key) {
 476                 memcpy(user_session_key, response.data.auth.user_session_key,
 477                         sizeof(response.data.auth.user_session_key));
 478         }
 479
 480         if (flags & WBFLAG_PAM_UNIX_NAME) {
 481                 *unix_name = SMB_STRDUP(response.data.auth.unix_username);
 482                 if (!*unix_name) {
 483                         winbindd_free_response(&response);
 484                         return NT_STATUS_NO_MEMORY;
 485                 }
 486         }
 487
 488         winbindd_free_response(&response);
 489         return nt_status;
 490 }
 491
 492 /* contact server to change user password using auth crap */
 493 static NTSTATUS contact_winbind_change_pswd_auth_crap(const char *username,
 494                                                       const char *domain,
 495                                                       const DATA_BLOB new_nt_pswd,
 496                                                       const DATA_BLOB old_nt_hash_enc,
 497                                                       const DATA_BLOB new_lm_pswd,
 498                                                       const DATA_BLOB old_lm_hash_enc,
 499                                                       char  **error_string)
 500 {
 501         NTSTATUS nt_status;
 502         NSS_STATUS result;
 503         struct winbindd_request request;
 504         struct winbindd_response response;
 505
 506         if (!get_require_membership_sid())
 507         {
 508                 if(error_string)
 509                         *error_string = smb_xstrdup("Can't get membership sid.");
 510                 return NT_STATUS_INVALID_PARAMETER;
 511         }
 512
 513         ZERO_STRUCT(request);
 514         ZERO_STRUCT(response);
 515
 516         if(username != NULL)
 517                 fstrcpy(request.data.chng_pswd_auth_crap.user, username);
 518         if(domain != NULL)
 519                 fstrcpy(request.data.chng_pswd_auth_crap.domain,domain);
 520
 521         if(new_nt_pswd.length)
 522         {
 523                 memcpy(request.data.chng_pswd_auth_crap.new_nt_pswd, new_nt_pswd.data, sizeof(request.data.chng_pswd_auth_crap.new_nt_pswd));
 524                 request.data.chng_pswd_auth_crap.new_nt_pswd_len = new_nt_pswd.length;
 525         }
 526
 527         if(old_nt_hash_enc.length)
 528         {
 529                 memcpy(request.data.chng_pswd_auth_crap.old_nt_hash_enc, old_nt_hash_enc.data, sizeof(request.data.chng_pswd_auth_crap.old_nt_hash_enc));
 530                 request.data.chng_pswd_auth_crap.old_nt_hash_enc_len = old_nt_hash_enc.length;
 531         }
 532
 533         if(new_lm_pswd.length)
 534         {
 535                 memcpy(request.data.chng_pswd_auth_crap.new_lm_pswd, new_lm_pswd.data, sizeof(request.data.chng_pswd_auth_crap.new_lm_pswd));
 536                 request.data.chng_pswd_auth_crap.new_lm_pswd_len = new_lm_pswd.length;
 537         }
 538
 539         if(old_lm_hash_enc.length)
 540         {
 541                 memcpy(request.data.chng_pswd_auth_crap.old_lm_hash_enc, old_lm_hash_enc.data, sizeof(request.data.chng_pswd_auth_crap.old_lm_hash_enc));
 542                 request.data.chng_pswd_auth_crap.old_lm_hash_enc_len = old_lm_hash_enc.length;
 543         }
 544
 545         result = winbindd_request_response(WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, &request, &response);
 546
 547         /* Display response */
 548
 549         if ((result != NSS_STATUS_SUCCESS) && (response.data.auth.nt_status == 0))
 550         {
 551                 nt_status = NT_STATUS_UNSUCCESSFUL;
 552                 if (error_string)
 553                         *error_string = smb_xstrdup("Reading winbind reply failed!");
 554                 winbindd_free_response(&response);
 555                 return nt_status;
 556         }
 557
 558         nt_status = (NT_STATUS(response.data.auth.nt_status));
 559         if (!NT_STATUS_IS_OK(nt_status))
 560         {
 561                 if (error_string)
 562                         *error_string = smb_xstrdup(response.data.auth.error_string);
 563                 winbindd_free_response(&response);
 564                 return nt_status;
 565         }
 566
 567         winbindd_free_response(&response);
 568
 569     return nt_status;
 570 }
 571
 572 static NTSTATUS winbind_pw_check(struct ntlmssp_state *ntlmssp_state, TALLOC_CTX *mem_ctx,
 573                                  DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key)
 574 {
 575         static const char zeros[16] = { 0, };
 576         NTSTATUS nt_status;
 577         char *error_string = NULL;
 578         uint8 lm_key[8];
 579         uint8 user_sess_key[16];
 580         char *unix_name = NULL;
 581
 582         nt_status = contact_winbind_auth_crap(ntlmssp_state->user, ntlmssp_state->domain,
 583                                               ntlmssp_state->client.netbios_name,
 584                                               &ntlmssp_state->chal,
 585                                               &ntlmssp_state->lm_resp,
 586                                               &ntlmssp_state->nt_resp,
 587                                               WBFLAG_PAM_LMKEY | WBFLAG_PAM_USER_SESSION_KEY | WBFLAG_PAM_UNIX_NAME,
 588                                               lm_key, user_sess_key,
 589                                               &error_string, &unix_name);
 590
 591         if (NT_STATUS_IS_OK(nt_status)) {
 592                 if (memcmp(lm_key, zeros, 8) != 0) {
 593                         *lm_session_key = data_blob_talloc(mem_ctx, NULL, 16);
 594                         memcpy(lm_session_key->data, lm_key, 8);
 595                         memset(lm_session_key->data+8, '\0', 8);
 596                 }
 597
 598                 if (memcmp(user_sess_key, zeros, 16) != 0) {
 599                         *user_session_key = data_blob_talloc(mem_ctx, user_sess_key, 16);
 600                 }
 601                 ntlmssp_state->callback_private = talloc_strdup(ntlmssp_state,
 602                                                                 unix_name);
 603         } else {
 604                 DEBUG(NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED) ? 0 : 3,
 605                       ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
 606                        ntlmssp_state->domain, ntlmssp_state->user,
 607                        ntlmssp_state->client.netbios_name,
 608                        error_string ? error_string : "unknown error (NULL)"));
 609                 ntlmssp_state->callback_private = NULL;
 610         }
 611
 612         SAFE_FREE(error_string);
 613         SAFE_FREE(unix_name);
 614         return nt_status;
 615 }
 616
 617 static NTSTATUS local_pw_check(struct ntlmssp_state *ntlmssp_state, TALLOC_CTX *mem_ctx,
 618                                DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key)
 619 {
 620         NTSTATUS nt_status;
 621         struct samr_Password lm_pw, nt_pw;
 622
 623         nt_lm_owf_gen (opt_password, nt_pw.hash, lm_pw.hash);
 624
 625         nt_status = ntlm_password_check(mem_ctx,
 626                                         true, true, 0,
 627                                         &ntlmssp_state->chal,
 628                                         &ntlmssp_state->lm_resp,
 629                                         &ntlmssp_state->nt_resp,
 630                                         ntlmssp_state->user,
 631                                         ntlmssp_state->user,
 632                                         ntlmssp_state->domain,
 633                                         &lm_pw, &nt_pw, user_session_key, lm_session_key);
 634
 635         if (NT_STATUS_IS_OK(nt_status)) {
 636                 ntlmssp_state->callback_private = talloc_asprintf(ntlmssp_state,
 637                                                               "%s%c%s", ntlmssp_state->domain,
 638                                                               *lp_winbind_separator(),
 639                                                               ntlmssp_state->user);
 640         } else {
 641                 DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
 642                           ntlmssp_state->domain, ntlmssp_state->user,
 643                           ntlmssp_state->client.netbios_name,
 644                           nt_errstr(nt_status)));
 645                 ntlmssp_state->callback_private = NULL;
 646         }
 647         return nt_status;
 648 }
 649
 650 static NTSTATUS ntlm_auth_start_ntlmssp_client(struct ntlmssp_state **client_ntlmssp_state)
 651 {
 652         NTSTATUS status;
 653         if ( (opt_username == NULL) || (opt_domain == NULL) ) {
 654                 status = NT_STATUS_UNSUCCESSFUL;
 655                 DEBUG(1, ("Need username and domain for NTLMSSP\n"));
 656                 return NT_STATUS_INVALID_PARAMETER;
 657         }
 658
 659         status = ntlmssp_client_start(NULL,
 660                                       lp_netbios_name(),
 661                                       lp_workgroup(),
 662                                       lp_client_ntlmv2_auth(),
 663                                       client_ntlmssp_state);
 664
 665         if (!NT_STATUS_IS_OK(status)) {
 666                 DEBUG(1, ("Could not start NTLMSSP client: %s\n",
 667                           nt_errstr(status)));
 668                 TALLOC_FREE(*client_ntlmssp_state);
 669                 return status;
 670         }
 671
 672         status = ntlmssp_set_username(*client_ntlmssp_state, opt_username);
 673
 674         if (!NT_STATUS_IS_OK(status)) {
 675                 DEBUG(1, ("Could not set username: %s\n",
 676                           nt_errstr(status)));
 677                 TALLOC_FREE(*client_ntlmssp_state);
 678                 return status;
 679         }
 680
 681         status = ntlmssp_set_domain(*client_ntlmssp_state, opt_domain);
 682
 683         if (!NT_STATUS_IS_OK(status)) {
 684                 DEBUG(1, ("Could not set domain: %s\n",
 685                           nt_errstr(status)));
 686                 TALLOC_FREE(*client_ntlmssp_state);
 687                 return status;
 688         }
 689
 690         if (opt_password) {
 691                 status = ntlmssp_set_password(*client_ntlmssp_state, opt_password);
 692
 693                 if (!NT_STATUS_IS_OK(status)) {
 694                         DEBUG(1, ("Could not set password: %s\n",
 695                                   nt_errstr(status)));
 696                         TALLOC_FREE(*client_ntlmssp_state);
 697                         return status;
 698                 }
 699         }
 700
 701         return NT_STATUS_OK;
 702 }
 703
 704 static NTSTATUS ntlm_auth_start_ntlmssp_server(struct ntlmssp_state **ntlmssp_state)
 705 {
 706         NTSTATUS status;
 707         const char *netbios_name;
 708         const char *netbios_domain;
 709         const char *dns_name;
 710         char *dns_domain;
 711         bool is_standalone = false;
 712
 713         if (opt_password) {
 714                 netbios_name = lp_netbios_name();
 715                 netbios_domain = lp_workgroup();
 716         } else {
 717                 netbios_name = get_winbind_netbios_name();
 718                 netbios_domain = get_winbind_domain();
 719         }
 720         /* This should be a 'netbios domain -> DNS domain' mapping */
 721         dns_domain = get_mydnsdomname(talloc_tos());
 722         if (dns_domain) {
 723                 strlower_m(dns_domain);
 724         }
 725         dns_name = get_mydnsfullname();
 726
 727         status = ntlmssp_server_start(NULL,
 728                                       is_standalone,
 729                                       netbios_name,
 730                                       netbios_domain,
 731                                       dns_name,
 732                                       dns_domain,
 733                                       ntlmssp_state);
 734         if (!NT_STATUS_IS_OK(status)) {
 735                 DEBUG(1, ("Could not start NTLMSSP server: %s\n",
 736                           nt_errstr(status)));
 737                 return status;
 738         }
 739
 740         (*ntlmssp_state)->neg_flags |=
 741                 (NTLMSSP_NEGOTIATE_SIGN |
 742                  NTLMSSP_NEGOTIATE_SEAL);
 743
 744         /* Have we been given a local password, or should we ask winbind? */
 745         if (opt_password) {
 746                 (*ntlmssp_state)->check_password = local_pw_check;
 747         } else {
 748                 (*ntlmssp_state)->check_password = winbind_pw_check;
 749         }
 750         return NT_STATUS_OK;
 751 }
 752
 753 /*******************************************************************
 754  Used by firefox to drive NTLM auth to IIS servers.
 755 *******************************************************************/
 756
 757 static NTSTATUS do_ccache_ntlm_auth(DATA_BLOB initial_msg, DATA_BLOB challenge_msg,
 758                                 DATA_BLOB *reply)
 759 {
 760         struct winbindd_request wb_request;
 761         struct winbindd_response wb_response;
 762         int ctrl = 0;
 763         NSS_STATUS result;
 764
 765         /* get winbindd to do the ntlmssp step on our behalf */
 766         ZERO_STRUCT(wb_request);
 767         ZERO_STRUCT(wb_response);
 768
 769         /*
 770          * This is tricky here. If we set krb5_auth in pam_winbind.conf
 771          * creds for users in trusted domain will be stored the winbindd
 772          * child of the trusted domain. If we ask the primary domain for
 773          * ntlm_ccache_auth, it will fail. So, we have to ask the trusted
 774          * domain's child for ccache_ntlm_auth. that is to say, we have to
 775          * set WBFLAG_PAM_CONTACT_TRUSTDOM in request.flags.
 776          */
 777         ctrl = get_pam_winbind_config();
 778
 779         if (ctrl & WINBIND_KRB5_AUTH) {
 780                 wb_request.flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
 781         }
 782
 783         fstr_sprintf(wb_request.data.ccache_ntlm_auth.user,
 784                 "%s%c%s", opt_domain, winbind_separator(), opt_username);
 785         wb_request.data.ccache_ntlm_auth.uid = geteuid();
 786         wb_request.data.ccache_ntlm_auth.initial_blob_len = initial_msg.length;
 787         wb_request.data.ccache_ntlm_auth.challenge_blob_len = challenge_msg.length;
 788         wb_request.extra_len = initial_msg.length + challenge_msg.length;
 789
 790         if (wb_request.extra_len > 0) {
 791                 wb_request.extra_data.data = SMB_MALLOC_ARRAY(char, wb_request.extra_len);
 792                 if (wb_request.extra_data.data == NULL) {
 793                         return NT_STATUS_NO_MEMORY;
 794                 }
 795
 796                 memcpy(wb_request.extra_data.data, initial_msg.data, initial_msg.length);
 797                 memcpy(wb_request.extra_data.data + initial_msg.length,
 798                         challenge_msg.data, challenge_msg.length);
 799         }
 800
 801         result = winbindd_request_response(WINBINDD_CCACHE_NTLMAUTH, &wb_request, &wb_response);
 802         SAFE_FREE(wb_request.extra_data.data);
 803
 804         if (result != NSS_STATUS_SUCCESS) {
 805                 winbindd_free_response(&wb_response);
 806                 return NT_STATUS_UNSUCCESSFUL;
 807         }
 808
 809         if (reply) {
 810                 *reply = data_blob(wb_response.extra_data.data,
 811                                 wb_response.data.ccache_ntlm_auth.auth_blob_len);
 812                 if (wb_response.data.ccache_ntlm_auth.auth_blob_len > 0 &&
 813                                 reply->data == NULL) {
 814                         winbindd_free_response(&wb_response);
 815                         return NT_STATUS_NO_MEMORY;
 816                 }
 817         }
 818
 819         winbindd_free_response(&wb_response);
 820         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 821 }
 822
 823 static void manage_squid_ntlmssp_request_int(struct ntlm_auth_state *state,
 824                                              char *buf, int length,
 825                                              TALLOC_CTX *mem_ctx,
 826                                              char **response)
 827 {
 828         DATA_BLOB request, reply;
 829         NTSTATUS nt_status;
 830
 831         if (strlen(buf) < 2) {
 832                 DEBUG(1, ("NTLMSSP query [%s] invalid\n", buf));
 833                 *response = talloc_strdup(mem_ctx, "BH NTLMSSP query invalid");
 834                 return;
 835         }
 836
 837         if (strlen(buf) > 3) {
 838                 if(strncmp(buf, "SF ", 3) == 0){
 839                         DEBUG(10, ("Setting flags to negotioate\n"));
 840                         TALLOC_FREE(state->want_feature_list);
 841                         state->want_feature_list = talloc_strdup(state->mem_ctx,
 842                                         buf+3);
 843                         *response = talloc_strdup(mem_ctx, "OK");
 844                         return;
 845                 }
 846                 request = base64_decode_data_blob(buf + 3);
 847         } else {
 848                 request = data_blob_null;
 849         }
 850
 851         if ((strncmp(buf, "PW ", 3) == 0)) {
 852                 /* The calling application wants us to use a local password
 853                  * (rather than winbindd) */
 854
 855                 opt_password = SMB_STRNDUP((const char *)request.data,
 856                                 request.length);
 857
 858                 if (opt_password == NULL) {
 859                         DEBUG(1, ("Out of memory\n"));
 860                         *response = talloc_strdup(mem_ctx, "BH Out of memory");
 861                         data_blob_free(&request);
 862                         return;
 863                 }
 864
 865                 *response = talloc_strdup(mem_ctx, "OK");
 866                 data_blob_free(&request);
 867                 return;
 868         }
 869
 870         if (strncmp(buf, "YR", 2) == 0) {
 871                 TALLOC_FREE(state->ntlmssp_state);
 872                 state->svr_state = SERVER_INITIAL;
 873         } else if (strncmp(buf, "KK", 2) == 0) {
 874                 /* No special preprocessing required */
 875         } else if (strncmp(buf, "GF", 2) == 0) {
 876                 DEBUG(10, ("Requested negotiated NTLMSSP flags\n"));
 877
 878                 if (state->svr_state == SERVER_FINISHED) {
 879                         *response = talloc_asprintf(mem_ctx, "GF 0x%08x",
 880                                                  state->neg_flags);
 881                 }
 882                 else {
 883                         *response = talloc_strdup(mem_ctx, "BH\n");
 884                 }
 885                 data_blob_free(&request);
 886                 return;
 887         } else if (strncmp(buf, "GK", 2) == 0) {
 888                 DEBUG(10, ("Requested NTLMSSP session key\n"));
 889                 if(state->have_session_key) {
 890                         char *key64 = base64_encode_data_blob(state->mem_ctx,
 891                                         state->session_key);
 892                         *response = talloc_asprintf(mem_ctx, "GK %s",
 893                                                  key64 ? key64 : "<NULL>");
 894                         TALLOC_FREE(key64);
 895                 } else {
 896                         *response = talloc_strdup(mem_ctx, "BH");
 897                 }
 898
 899                 data_blob_free(&request);
 900                 return;
 901         } else {
 902                 DEBUG(1, ("NTLMSSP query [%s] invalid\n", buf));
 903                 *response = talloc_strdup(mem_ctx, "BH NTLMSSP query invalid");
 904                 return;
 905         }
 906
 907         if (!state->ntlmssp_state) {
 908                 nt_status = ntlm_auth_start_ntlmssp_server(
 909                                 &state->ntlmssp_state);
 910                 if (!NT_STATUS_IS_OK(nt_status)) {
 911                         *response = talloc_asprintf(
 912                                 mem_ctx, "BH %s", nt_errstr(nt_status));
 913                         return;
 914                 }
 915                 ntlmssp_want_feature_list(state->ntlmssp_state,
 916                                 state->want_feature_list);
 917         }
 918
 919         DEBUG(10, ("got NTLMSSP packet:\n"));
 920         dump_data(10, request.data, request.length);
 921
 922         nt_status = ntlmssp_update(state->ntlmssp_state, request, &reply);
 923
 924         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 925                 char *reply_base64 = base64_encode_data_blob(state->mem_ctx,
 926                                 reply);
 927                 *response = talloc_asprintf(mem_ctx, "TT %s", reply_base64);
 928                 TALLOC_FREE(reply_base64);
 929                 data_blob_free(&reply);
 930                 state->svr_state = SERVER_CHALLENGE;
 931                 DEBUG(10, ("NTLMSSP challenge\n"));
 932         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
 933                 *response = talloc_asprintf(mem_ctx, "BH %s",
 934                                          nt_errstr(nt_status));
 935                 DEBUG(0, ("NTLMSSP BH: %s\n", nt_errstr(nt_status)));
 936
 937                 TALLOC_FREE(state->ntlmssp_state);
 938         } else if (!NT_STATUS_IS_OK(nt_status)) {
 939                 *response = talloc_asprintf(mem_ctx, "NA %s",
 940                                          nt_errstr(nt_status));
 941                 DEBUG(10, ("NTLMSSP %s\n", nt_errstr(nt_status)));
 942         } else {
 943                 *response = talloc_asprintf(
 944                         mem_ctx, "AF %s",
 945                         (char *)state->ntlmssp_state->callback_private);
 946                 DEBUG(10, ("NTLMSSP OK!\n"));
 947
 948                 if(state->have_session_key)
 949                         data_blob_free(&state->session_key);
 950                 state->session_key = data_blob(
 951                                 state->ntlmssp_state->session_key.data,
 952                                 state->ntlmssp_state->session_key.length);
 953                 state->neg_flags = state->ntlmssp_state->neg_flags;
 954                 state->have_session_key = true;
 955                 state->svr_state = SERVER_FINISHED;
 956         }
 957
 958         data_blob_free(&request);
 959 }
 960
 961 static void manage_squid_ntlmssp_request(struct ntlm_auth_state *state,
 962                                          char *buf, int length)
 963 {
 964         char *response;
 965
 966         manage_squid_ntlmssp_request_int(state, buf, length,
 967                                          talloc_tos(), &response);
 968
 969         if (response == NULL) {
 970                 x_fprintf(x_stdout, "BH Out of memory\n");
 971                 return;
 972         }
 973         x_fprintf(x_stdout, "%s\n", response);
 974         TALLOC_FREE(response);
 975 }
 976
 977 static void manage_client_ntlmssp_request(struct ntlm_auth_state *state,
 978                                                 char *buf, int length)
 979 {
 980         DATA_BLOB request, reply;
 981         NTSTATUS nt_status;
 982
 983         if (!opt_username || !*opt_username) {
 984                 x_fprintf(x_stderr, "username must be specified!\n\n");
 985                 exit(1);
 986         }
 987
 988         if (strlen(buf) < 2) {
 989                 DEBUG(1, ("NTLMSSP query [%s] invalid\n", buf));
 990                 x_fprintf(x_stdout, "BH NTLMSSP query invalid\n");
 991                 return;
 992         }
 993
 994         if (strlen(buf) > 3) {
 995                 if(strncmp(buf, "SF ", 3) == 0) {
 996                         DEBUG(10, ("Looking for flags to negotiate\n"));
 997                         talloc_free(state->want_feature_list);
 998                         state->want_feature_list = talloc_strdup(state->mem_ctx,
 999                                         buf+3);
1000                         x_fprintf(x_stdout, "OK\n");
1001                         return;
1002                 }
1003                 request = base64_decode_data_blob(buf + 3);
1004         } else {
1005                 request = data_blob_null;
1006         }
1007
1008         if (strncmp(buf, "PW ", 3) == 0) {
1009                 /* We asked for a password and obviously got it :-) */
1010
1011                 opt_password = SMB_STRNDUP((const char *)request.data,
1012                                 request.length);
1013
1014                 if (opt_password == NULL) {
1015                         DEBUG(1, ("Out of memory\n"));
1016                         x_fprintf(x_stdout, "BH Out of memory\n");
1017                         data_blob_free(&request);
1018                         return;
1019                 }
1020
1021                 x_fprintf(x_stdout, "OK\n");
1022                 data_blob_free(&request);
1023                 return;
1024         }
1025
1026         if (!state->ntlmssp_state && use_cached_creds) {
1027                 /* check whether cached credentials are usable. */
1028                 DATA_BLOB empty_blob = data_blob_null;
1029
1030                 nt_status = do_ccache_ntlm_auth(empty_blob, empty_blob, NULL);
1031                 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1032                         /* failed to use cached creds */
1033                         use_cached_creds = False;
1034                 }
1035         }
1036
1037         if (opt_password == NULL && !use_cached_creds) {
1038                 /* Request a password from the calling process.  After
1039                    sending it, the calling process should retry asking for the
1040                    negotiate. */
1041
1042                 DEBUG(10, ("Requesting password\n"));
1043                 x_fprintf(x_stdout, "PW\n");
1044                 return;
1045         }
1046
1047         if (strncmp(buf, "YR", 2) == 0) {
1048                 TALLOC_FREE(state->ntlmssp_state);
1049                 state->cli_state = CLIENT_INITIAL;
1050         } else if (strncmp(buf, "TT", 2) == 0) {
1051                 /* No special preprocessing required */
1052         } else if (strncmp(buf, "GF", 2) == 0) {
1053                 DEBUG(10, ("Requested negotiated NTLMSSP flags\n"));
1054
1055                 if(state->cli_state == CLIENT_FINISHED) {
1056                         x_fprintf(x_stdout, "GF 0x%08x\n", state->neg_flags);
1057                 }
1058                 else {
1059                         x_fprintf(x_stdout, "BH\n");
1060                 }
1061
1062                 data_blob_free(&request);
1063                 return;
1064         } else if (strncmp(buf, "GK", 2) == 0 ) {
1065                 DEBUG(10, ("Requested session key\n"));
1066
1067                 if(state->cli_state == CLIENT_FINISHED) {
1068                         char *key64 = base64_encode_data_blob(state->mem_ctx,
1069                                         state->session_key);
1070                         x_fprintf(x_stdout, "GK %s\n", key64?key64:"<NULL>");
1071                         TALLOC_FREE(key64);
1072                 }
1073                 else {
1074                         x_fprintf(x_stdout, "BH\n");
1075                 }
1076
1077                 data_blob_free(&request);
1078                 return;
1079         } else {
1080                 DEBUG(1, ("NTLMSSP query [%s] invalid\n", buf));
1081                 x_fprintf(x_stdout, "BH NTLMSSP query invalid\n");
1082                 return;
1083         }
1084
1085         if (!state->ntlmssp_state) {
1086                 nt_status = ntlm_auth_start_ntlmssp_client(
1087                                 &state->ntlmssp_state);
1088                 if (!NT_STATUS_IS_OK(nt_status)) {
1089                         x_fprintf(x_stdout, "BH %s\n", nt_errstr(nt_status));
1090                         return;
1091                 }
1092                 ntlmssp_want_feature_list(state->ntlmssp_state,
1093                                 state->want_feature_list);
1094                 state->initial_message = data_blob_null;
1095         }
1096
1097         DEBUG(10, ("got NTLMSSP packet:\n"));
1098         dump_data(10, request.data, request.length);
1099
1100         if (use_cached_creds && !opt_password &&
1101                         (state->cli_state == CLIENT_RESPONSE)) {
1102                 nt_status = do_ccache_ntlm_auth(state->initial_message, request,
1103                                 &reply);
1104         } else {
1105                 nt_status = ntlmssp_update(state->ntlmssp_state, request,
1106                                 &reply);
1107         }
1108
1109         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1110                 char *reply_base64 = base64_encode_data_blob(state->mem_ctx,
1111                                 reply);
1112                 if (state->cli_state == CLIENT_INITIAL) {
1113                         x_fprintf(x_stdout, "YR %s\n", reply_base64);
1114                         state->initial_message = reply;
1115                         state->cli_state = CLIENT_RESPONSE;
1116                 } else {
1117                         x_fprintf(x_stdout, "KK %s\n", reply_base64);
1118                         data_blob_free(&reply);
1119                 }
1120                 TALLOC_FREE(reply_base64);
1121                 DEBUG(10, ("NTLMSSP challenge\n"));
1122         } else if (NT_STATUS_IS_OK(nt_status)) {
1123                 char *reply_base64 = base64_encode_data_blob(talloc_tos(),
1124                                 reply);
1125                 x_fprintf(x_stdout, "AF %s\n", reply_base64);
1126                 TALLOC_FREE(reply_base64);
1127
1128                 if(state->have_session_key)
1129                         data_blob_free(&state->session_key);
1130
1131                 state->session_key = data_blob(
1132                                 state->ntlmssp_state->session_key.data,
1133                                 state->ntlmssp_state->session_key.length);
1134                 state->neg_flags = state->ntlmssp_state->neg_flags;
1135                 state->have_session_key = true;
1136
1137                 DEBUG(10, ("NTLMSSP OK!\n"));
1138                 state->cli_state = CLIENT_FINISHED;
1139                 TALLOC_FREE(state->ntlmssp_state);
1140         } else {
1141                 x_fprintf(x_stdout, "BH %s\n", nt_errstr(nt_status));
1142                 DEBUG(0, ("NTLMSSP BH: %s\n", nt_errstr(nt_status)));
1143                 state->cli_state = CLIENT_ERROR;
1144                 TALLOC_FREE(state->ntlmssp_state);
1145         }
1146
1147         data_blob_free(&request);
1148 }
1149
1150 static void manage_squid_basic_request(struct ntlm_auth_state *state,
1151                                         char *buf, int length)
1152 {
1153         char *user, *pass;
1154         user=buf;
1155
1156         pass=(char *)memchr(buf,' ',length);
1157         if (!pass) {
1158                 DEBUG(2, ("Password not found. Denying access\n"));
1159                 x_fprintf(x_stdout, "ERR\n");
1160                 return;
1161         }
1162         *pass='\0';
1163         pass++;
1164
1165         if (state->helper_mode == SQUID_2_5_BASIC) {
1166                 rfc1738_unescape(user);
1167                 rfc1738_unescape(pass);
1168         }
1169
1170         if (check_plaintext_auth(user, pass, False)) {
1171                 x_fprintf(x_stdout, "OK\n");
1172         } else {
1173                 x_fprintf(x_stdout, "ERR\n");
1174         }
1175 }
1176
1177 static void offer_gss_spnego_mechs(void) {
1178
1179         DATA_BLOB token;
1180         struct spnego_data spnego;
1181         ssize_t len;
1182         char *reply_base64;
1183         TALLOC_CTX *ctx = talloc_tos();
1184         char *principal;
1185         char *myname_lower;
1186
1187         ZERO_STRUCT(spnego);
1188
1189         myname_lower = talloc_strdup(ctx, lp_netbios_name());
1190         if (!myname_lower) {
1191                 return;
1192         }
1193         strlower_m(myname_lower);
1194
1195         principal = talloc_asprintf(ctx, "%s$@%s", myname_lower, lp_realm());
1196         if (!principal) {
1197                 return;
1198         }
1199
1200         /* Server negTokenInit (mech offerings) */
1201         spnego.type = SPNEGO_NEG_TOKEN_INIT;
1202         spnego.negTokenInit.mechTypes = talloc_array(ctx, const char *, 4);
1203 #ifdef HAVE_KRB5
1204         spnego.negTokenInit.mechTypes[0] = talloc_strdup(ctx, OID_KERBEROS5_OLD);
1205         spnego.negTokenInit.mechTypes[1] = talloc_strdup(ctx, OID_KERBEROS5);
1206         spnego.negTokenInit.mechTypes[2] = talloc_strdup(ctx, OID_NTLMSSP);
1207         spnego.negTokenInit.mechTypes[3] = NULL;
1208 #else
1209         spnego.negTokenInit.mechTypes[0] = talloc_strdup(ctx, OID_NTLMSSP);
1210         spnego.negTokenInit.mechTypes[1] = NULL;
1211 #endif
1212
1213
1214         spnego.negTokenInit.mechListMIC = data_blob_talloc(ctx, principal,
1215                                                     strlen(principal));
1216
1217         len = spnego_write_data(ctx, &token, &spnego);
1218         spnego_free_data(&spnego);
1219
1220         if (len == -1) {
1221                 DEBUG(1, ("Could not write SPNEGO data blob\n"));
1222                 x_fprintf(x_stdout, "BH Could not write SPNEGO data blob\n");
1223                 return;
1224         }
1225
1226         reply_base64 = base64_encode_data_blob(talloc_tos(), token);
1227         x_fprintf(x_stdout, "TT %s *\n", reply_base64);
1228
1229         TALLOC_FREE(reply_base64);
1230         data_blob_free(&token);
1231         DEBUG(10, ("sent SPNEGO negTokenInit\n"));
1232         return;
1233 }
1234
1235 bool spnego_parse_krb5_wrap(TALLOC_CTX *ctx, DATA_BLOB blob, DATA_BLOB *ticket, uint8 tok_id[2])
1236 {
1237         bool ret;
1238         ASN1_DATA *data;
1239         int data_remaining;
1240
1241         data = asn1_init(talloc_tos());
1242         if (data == NULL) {
1243                 return false;
1244         }
1245
1246         asn1_load(data, blob);
1247         asn1_start_tag(data, ASN1_APPLICATION(0));
1248         asn1_check_OID(data, OID_KERBEROS5);
1249
1250         data_remaining = asn1_tag_remaining(data);
1251
1252         if (data_remaining < 3) {
1253                 data->has_error = True;
1254         } else {
1255                 asn1_read(data, tok_id, 2);
1256                 data_remaining -= 2;
1257                 *ticket = data_blob_talloc(ctx, NULL, data_remaining);
1258                 asn1_read(data, ticket->data, ticket->length);
1259         }
1260
1261         asn1_end_tag(data);
1262
1263         ret = !data->has_error;
1264
1265         if (data->has_error) {
1266                 data_blob_free(ticket);
1267         }
1268
1269         asn1_free(data);
1270
1271         return ret;
1272 }
1273
1274 static void manage_gss_spnego_request(struct ntlm_auth_state *state,
1275                                         char *buf, int length)
1276 {
1277         struct spnego_data request, response;
1278         DATA_BLOB token;
1279         DATA_BLOB raw_in_token = data_blob_null;
1280         DATA_BLOB raw_out_token = data_blob_null;
1281         NTSTATUS status;
1282         ssize_t len;
1283         TALLOC_CTX *ctx = talloc_tos();
1284
1285         char *user = NULL;
1286         char *domain = NULL;
1287
1288         const char *reply_code;
1289         char       *reply_base64;
1290         char *reply_argument = NULL;
1291         char *supportedMech = NULL;
1292
1293         if (strlen(buf) < 2) {
1294                 DEBUG(1, ("SPENGO query [%s] invalid\n", buf));
1295                 x_fprintf(x_stdout, "BH SPENGO query invalid\n");
1296                 return;
1297         }
1298
1299         if (strncmp(buf, "YR", 2) == 0) {
1300                 TALLOC_FREE(state->ntlmssp_state);
1301                 TALLOC_FREE(state->spnego_mech);
1302                 TALLOC_FREE(state->spnego_mech_oid);
1303         } else if (strncmp(buf, "KK", 2) == 0) {
1304                 ;
1305         } else {
1306                 DEBUG(1, ("SPENGO query [%s] invalid\n", buf));
1307                 x_fprintf(x_stdout, "BH SPENGO query invalid\n");
1308                 return;
1309         }
1310
1311         if ( (strlen(buf) == 2)) {
1312
1313                 /* no client data, get the negTokenInit offering
1314                    mechanisms */
1315
1316                 offer_gss_spnego_mechs();
1317                 return;
1318         }
1319
1320         /* All subsequent requests have a blob. This might be negTokenInit or negTokenTarg */
1321
1322         if (strlen(buf) <= 3) {
1323                 DEBUG(1, ("GSS-SPNEGO query [%s] invalid\n", buf));
1324                 x_fprintf(x_stdout, "BH GSS-SPNEGO query invalid\n");
1325                 return;
1326         }
1327
1328         token = base64_decode_data_blob(buf + 3);
1329
1330         if ((token.length >= 7)
1331             && (strncmp((char *)token.data, "NTLMSSP", 7) == 0)) {
1332                 char *reply;
1333
1334                 data_blob_free(&token);
1335
1336                 DEBUG(10, ("Could not parse GSS-SPNEGO, trying raw "
1337                            "ntlmssp\n"));
1338
1339                 manage_squid_ntlmssp_request_int(state, buf, length,
1340                                                  talloc_tos(), &reply);
1341                 if (reply == NULL) {
1342                         x_fprintf(x_stdout, "BH Out of memory\n");
1343                         return;
1344                 }
1345
1346                 if (strncmp(reply, "AF ", 3) == 0) {
1347                         x_fprintf(x_stdout, "AF * %s\n", reply+3);
1348                 } else {
1349                         x_fprintf(x_stdout, "%s *\n", reply);
1350                 }
1351
1352                 TALLOC_FREE(reply);
1353                 return;
1354         }
1355
1356         ZERO_STRUCT(request);
1357         len = spnego_read_data(ctx, token, &request);
1358         data_blob_free(&token);
1359
1360         if (len == -1) {
1361                 DEBUG(1, ("GSS-SPNEGO query [%s] invalid\n", buf));
1362                 x_fprintf(x_stdout, "BH GSS-SPNEGO query invalid\n");
1363                 return;
1364         }
1365
1366         if (request.type == SPNEGO_NEG_TOKEN_INIT) {
1367 #ifdef HAVE_KRB5
1368                 int krb5_idx = -1;
1369 #endif
1370                 int ntlm_idx = -1;
1371                 int used_idx = -1;
1372                 int i;
1373
1374                 if (state->spnego_mech) {
1375                         DEBUG(1, ("Client restarted SPNEGO with NegTokenInit "
1376                                   "while mech[%s] was already negotiated\n",
1377                                   state->spnego_mech));
1378                         x_fprintf(x_stdout, "BH Client send NegTokenInit twice\n");
1379                         return;
1380                 }
1381
1382                 /* Second request from Client. This is where the
1383                    client offers its mechanism to use. */
1384
1385                 if ( (request.negTokenInit.mechTypes == NULL) ||
1386                      (request.negTokenInit.mechTypes[0] == NULL) ) {
1387                         DEBUG(1, ("Client did not offer any mechanism\n"));
1388                         x_fprintf(x_stdout, "BH Client did not offer any "
1389                                             "mechanism\n");
1390                         return;
1391                 }
1392
1393                 status = NT_STATUS_UNSUCCESSFUL;
1394                 for (i = 0; request.negTokenInit.mechTypes[i] != NULL; i++) {
1395                         DEBUG(10,("got mech[%d][%s]\n",
1396                                 i, request.negTokenInit.mechTypes[i]));
1397 #ifdef HAVE_KRB5
1398                         if (strcmp(request.negTokenInit.mechTypes[i], OID_KERBEROS5_OLD) == 0) {
1399                                 krb5_idx = i;
1400                                 break;
1401                         }
1402                         if (strcmp(request.negTokenInit.mechTypes[i], OID_KERBEROS5) == 0) {
1403                                 krb5_idx = i;
1404                                 break;
1405                         }
1406 #endif
1407                         if (strcmp(request.negTokenInit.mechTypes[i], OID_NTLMSSP) == 0) {
1408                                 ntlm_idx = i;
1409                                 break;
1410                         }
1411                 }
1412
1413                 used_idx = ntlm_idx;
1414 #ifdef HAVE_KRB5
1415                 if (krb5_idx != -1) {
1416                         ntlm_idx = -1;
1417                         used_idx = krb5_idx;
1418                 }
1419 #endif
1420                 if (ntlm_idx > -1) {
1421                         state->spnego_mech = talloc_strdup(state, "ntlmssp");
1422                         if (state->spnego_mech == NULL) {
1423                                 x_fprintf(x_stdout, "BH Out of memory\n");
1424                                 return;
1425                         }
1426
1427                         if (state->ntlmssp_state) {
1428                                 DEBUG(1, ("Client wants a new NTLMSSP challenge, but "
1429                                           "already got one\n"));
1430                                 x_fprintf(x_stdout, "BH Client wants a new "
1431                                                     "NTLMSSP challenge, but "
1432                                                     "already got one\n");
1433                                 TALLOC_FREE(state->ntlmssp_state);
1434                                 return;
1435                         }
1436
1437                         status = ntlm_auth_start_ntlmssp_server(&state->ntlmssp_state);
1438                         if (!NT_STATUS_IS_OK(status)) {
1439                                 x_fprintf(x_stdout, "BH %s\n", nt_errstr(status));
1440                                 return;
1441                         }
1442                 }
1443
1444 #ifdef HAVE_KRB5
1445                 if (krb5_idx > -1) {
1446                         state->spnego_mech = talloc_strdup(state, "krb5");
1447                         if (state->spnego_mech == NULL) {
1448                                 x_fprintf(x_stdout, "BH Out of memory\n");
1449                                 return;
1450                         }
1451                 }
1452 #endif
1453                 if (used_idx > -1) {
1454                         state->spnego_mech_oid = talloc_strdup(state,
1455                                 request.negTokenInit.mechTypes[used_idx]);
1456                         if (state->spnego_mech_oid == NULL) {
1457                                 x_fprintf(x_stdout, "BH Out of memory\n");
1458                                 return;
1459                         }
1460                         supportedMech = talloc_strdup(ctx, state->spnego_mech_oid);
1461                         if (supportedMech == NULL) {
1462                                 x_fprintf(x_stdout, "BH Out of memory\n");
1463                                 return;
1464                         }
1465
1466                         status = NT_STATUS_MORE_PROCESSING_REQUIRED;
1467                 } else {
1468                         status = NT_STATUS_NOT_SUPPORTED;
1469                 }
1470                 if (used_idx == 0) {
1471                         status = NT_STATUS_OK;
1472                         raw_in_token = request.negTokenInit.mechToken;
1473                 }
1474         } else {
1475                 if (state->spnego_mech == NULL) {
1476                         DEBUG(1,("Got netTokenTarg without negTokenInit\n"));
1477                         x_fprintf(x_stdout, "BH Got a negTokenTarg without "
1478                                             "negTokenInit\n");
1479                         return;
1480                 }
1481
1482                 if ((request.negTokenTarg.supportedMech != NULL) &&
1483                      (strcmp(request.negTokenTarg.supportedMech, state->spnego_mech_oid) != 0 ) ) {
1484                         DEBUG(1, ("Got a negTokenTarg with mech[%s] while [%s] was already negotiated\n",
1485                                   request.negTokenTarg.supportedMech,
1486                                   state->spnego_mech_oid));
1487                         x_fprintf(x_stdout, "BH Got a negTokenTarg with speficied mech\n");
1488                         return;
1489                 }
1490
1491                 status = NT_STATUS_OK;
1492                 raw_in_token = request.negTokenTarg.responseToken;
1493         }
1494
1495         if (!NT_STATUS_IS_OK(status)) {
1496                 /* error or more processing */
1497         } else if (strcmp(state->spnego_mech, "ntlmssp") == 0) {
1498
1499                 DEBUG(10, ("got NTLMSSP packet:\n"));
1500                 dump_data(10, raw_in_token.data, raw_in_token.length);
1501
1502                 status = ntlmssp_update(state->ntlmssp_state,
1503                                         raw_in_token,
1504                                         &raw_out_token);
1505                 if (NT_STATUS_IS_OK(status)) {
1506                         user = talloc_strdup(ctx, state->ntlmssp_state->user);
1507                         domain = talloc_strdup(ctx, state->ntlmssp_state->domain);
1508                 }
1509                 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1510                         TALLOC_FREE(state->ntlmssp_state);
1511                 }
1512 #ifdef HAVE_KRB5
1513         } else if (strcmp(state->spnego_mech, "krb5") == 0) {
1514                 char *principal;
1515                 DATA_BLOB ap_rep;
1516                 DATA_BLOB session_key;
1517                 struct PAC_LOGON_INFO *logon_info = NULL;
1518                 DATA_BLOB ticket;
1519                 uint8_t tok_id[2];
1520
1521                 if (!spnego_parse_krb5_wrap(ctx, raw_in_token,
1522                                             &ticket, tok_id)) {
1523                         DEBUG(1, ("spnego_parse_krb5_wrap failed\n"));
1524                         x_fprintf(x_stdout, "BH spnego_parse_krb5_wrap failed\n");
1525                         return;
1526                 }
1527
1528                 status = ads_verify_ticket(ctx, lp_realm(), 0,
1529                                            &ticket,
1530                                            &principal, &logon_info, &ap_rep,
1531                                            &session_key, True);
1532
1533                 /* Now in "principal" we have the name we are authenticated as. */
1534
1535                 if (NT_STATUS_IS_OK(status)) {
1536
1537                         domain = strchr_m(principal, '@');
1538
1539                         if (domain == NULL) {
1540                                 DEBUG(1, ("Did not get a valid principal "
1541                                           "from ads_verify_ticket\n"));
1542                                 x_fprintf(x_stdout, "BH Did not get a "
1543                                           "valid principal from "
1544                                           "ads_verify_ticket\n");
1545                                 return;
1546                         }
1547
1548                         *domain++ = '\0';
1549                         domain = talloc_strdup(ctx, domain);
1550                         user = talloc_strdup(ctx, principal);
1551
1552                         if (logon_info) {
1553                                 netsamlogon_cache_store(
1554                                         user, &logon_info->info3);
1555                         }
1556
1557                         data_blob_free(&ap_rep);
1558                         data_blob_free(&session_key);
1559                 }
1560                 data_blob_free(&ticket);
1561 #endif
1562         }
1563
1564         spnego_free_data(&request);
1565         ZERO_STRUCT(response);
1566         response.type = SPNEGO_NEG_TOKEN_TARG;
1567
1568         if (NT_STATUS_IS_OK(status)) {
1569                 TALLOC_FREE(state->spnego_mech);
1570                 TALLOC_FREE(state->spnego_mech_oid);
1571                 response.negTokenTarg.negResult = SPNEGO_ACCEPT_COMPLETED;
1572                 response.negTokenTarg.responseToken = raw_out_token;
1573                 reply_code = "AF";
1574                 reply_argument = talloc_asprintf(ctx, "%s\\%s", domain, user);
1575         } else if (NT_STATUS_EQUAL(status,
1576                                    NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1577                 response.negTokenTarg.supportedMech = supportedMech;
1578                 response.negTokenTarg.responseToken = raw_out_token;
1579                 response.negTokenTarg.negResult = SPNEGO_ACCEPT_INCOMPLETE;
1580                 reply_code = "TT";
1581                 reply_argument = talloc_strdup(ctx, "*");
1582         } else {
1583                 TALLOC_FREE(state->spnego_mech);
1584                 TALLOC_FREE(state->spnego_mech_oid);
1585                 data_blob_free(&raw_out_token);
1586                 response.negTokenTarg.negResult = SPNEGO_REJECT;
1587                 reply_code = "NA";
1588                 reply_argument = talloc_strdup(ctx, nt_errstr(status));
1589         }
1590
1591         if (!reply_argument) {
1592                 DEBUG(1, ("Could not write SPNEGO data blob\n"));
1593                 x_fprintf(x_stdout, "BH Could not write SPNEGO data blob\n");
1594                 spnego_free_data(&response);
1595                 return;
1596         }
1597
1598         len = spnego_write_data(ctx, &token, &response);
1599         spnego_free_data(&response);
1600
1601         if (len == -1) {
1602                 DEBUG(1, ("Could not write SPNEGO data blob\n"));
1603                 x_fprintf(x_stdout, "BH Could not write SPNEGO data blob\n");
1604                 return;
1605         }
1606
1607         reply_base64 = base64_encode_data_blob(talloc_tos(), token);
1608
1609         x_fprintf(x_stdout, "%s %s %s\n",
1610                   reply_code, reply_base64, reply_argument);
1611
1612         TALLOC_FREE(reply_base64);
1613         data_blob_free(&token);
1614
1615         return;
1616 }
1617
1618 static struct ntlmssp_state *client_ntlmssp_state = NULL;
1619
1620 static bool manage_client_ntlmssp_init(struct spnego_data spnego)
1621 {
1622         NTSTATUS status;
1623         DATA_BLOB null_blob = data_blob_null;
1624         DATA_BLOB to_server;
1625         char *to_server_base64;
1626         const char *my_mechs[] = {OID_NTLMSSP, NULL};
1627         TALLOC_CTX *ctx = talloc_tos();
1628
1629         DEBUG(10, ("Got spnego negTokenInit with NTLMSSP\n"));
1630
1631         if (client_ntlmssp_state != NULL) {
1632                 DEBUG(1, ("Request for initial SPNEGO request where "
1633                           "we already have a state\n"));
1634                 return False;
1635         }
1636
1637         if (!client_ntlmssp_state) {
1638                 if (!NT_STATUS_IS_OK(status = ntlm_auth_start_ntlmssp_client(&client_ntlmssp_state))) {
1639                         x_fprintf(x_stdout, "BH %s\n", nt_errstr(status));
1640                         return False;
1641                 }
1642         }
1643
1644
1645         if (opt_password == NULL) {
1646
1647                 /* Request a password from the calling process.  After
1648                    sending it, the calling process should retry with
1649                    the negTokenInit. */
1650
1651                 DEBUG(10, ("Requesting password\n"));
1652                 x_fprintf(x_stdout, "PW\n");
1653                 return True;
1654         }
1655
1656         spnego.type = SPNEGO_NEG_TOKEN_INIT;
1657         spnego.negTokenInit.mechTypes = my_mechs;
1658         spnego.negTokenInit.reqFlags = data_blob_null;
1659         spnego.negTokenInit.reqFlagsPadding = 0;
1660         spnego.negTokenInit.mechListMIC = null_blob;
1661
1662         status = ntlmssp_update(client_ntlmssp_state, null_blob,
1663                                        &spnego.negTokenInit.mechToken);
1664
1665         if ( !(NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) ||
1666                         NT_STATUS_IS_OK(status)) ) {
1667                 DEBUG(1, ("Expected OK or MORE_PROCESSING_REQUIRED, got: %s\n",
1668                           nt_errstr(status)));
1669                 TALLOC_FREE(client_ntlmssp_state);
1670                 return False;
1671         }
1672
1673         spnego_write_data(ctx, &to_server, &spnego);
1674         data_blob_free(&spnego.negTokenInit.mechToken);
1675
1676         to_server_base64 = base64_encode_data_blob(talloc_tos(), to_server);
1677         data_blob_free(&to_server);
1678         x_fprintf(x_stdout, "KK %s\n", to_server_base64);
1679         TALLOC_FREE(to_server_base64);
1680         return True;
1681 }
1682
1683 static void manage_client_ntlmssp_targ(struct spnego_data spnego)
1684 {
1685         NTSTATUS status;
1686         DATA_BLOB null_blob = data_blob_null;
1687         DATA_BLOB request;
1688         DATA_BLOB to_server;
1689         char *to_server_base64;
1690         TALLOC_CTX *ctx = talloc_tos();
1691
1692         DEBUG(10, ("Got spnego negTokenTarg with NTLMSSP\n"));
1693
1694         if (client_ntlmssp_state == NULL) {
1695                 DEBUG(1, ("Got NTLMSSP tArg without a client state\n"));
1696                 x_fprintf(x_stdout, "BH Got NTLMSSP tArg without a client state\n");
1697                 return;
1698         }
1699
1700         if (spnego.negTokenTarg.negResult == SPNEGO_REJECT) {
1701                 x_fprintf(x_stdout, "NA\n");
1702                 TALLOC_FREE(client_ntlmssp_state);
1703                 return;
1704         }
1705
1706         if (spnego.negTokenTarg.negResult == SPNEGO_ACCEPT_COMPLETED) {
1707                 x_fprintf(x_stdout, "AF\n");
1708                 TALLOC_FREE(client_ntlmssp_state);
1709                 return;
1710         }
1711
1712         status = ntlmssp_update(client_ntlmssp_state,
1713                                        spnego.negTokenTarg.responseToken,
1714                                        &request);
1715
1716         if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1717                 DEBUG(1, ("Expected MORE_PROCESSING_REQUIRED from "
1718                           "ntlmssp_client_update, got: %s\n",
1719                           nt_errstr(status)));
1720                 x_fprintf(x_stdout, "BH Expected MORE_PROCESSING_REQUIRED from "
1721                                     "ntlmssp_client_update\n");
1722                 data_blob_free(&request);
1723                 TALLOC_FREE(client_ntlmssp_state);
1724                 return;
1725         }
1726
1727         spnego.type = SPNEGO_NEG_TOKEN_TARG;
1728         spnego.negTokenTarg.negResult = SPNEGO_ACCEPT_INCOMPLETE;
1729         spnego.negTokenTarg.supportedMech = (const char *)OID_NTLMSSP;
1730         spnego.negTokenTarg.responseToken = request;
1731         spnego.negTokenTarg.mechListMIC = null_blob;
1732
1733         spnego_write_data(ctx, &to_server, &spnego);
1734         data_blob_free(&request);
1735
1736         to_server_base64 = base64_encode_data_blob(talloc_tos(), to_server);
1737         data_blob_free(&to_server);
1738         x_fprintf(x_stdout, "KK %s\n", to_server_base64);
1739         TALLOC_FREE(to_server_base64);
1740         return;
1741 }
1742
1743 #ifdef HAVE_KRB5
1744
1745 static bool manage_client_krb5_init(struct spnego_data spnego)
1746 {
1747         char *principal;
1748         DATA_BLOB tkt, to_server;
1749         DATA_BLOB session_key_krb5 = data_blob_null;
1750         struct spnego_data reply;
1751         char *reply_base64;
1752         int retval;
1753
1754         const char *my_mechs[] = {OID_KERBEROS5_OLD, NULL};
1755         ssize_t len;
1756         TALLOC_CTX *ctx = talloc_tos();
1757
1758         if ( (spnego.negTokenInit.mechListMIC.data == NULL) ||
1759              (spnego.negTokenInit.mechListMIC.length == 0) ) {
1760                 DEBUG(1, ("Did not get a principal for krb5\n"));
1761                 return False;
1762         }
1763
1764         principal = (char *)SMB_MALLOC(
1765                 spnego.negTokenInit.mechListMIC.length+1);
1766
1767         if (principal == NULL) {
1768                 DEBUG(1, ("Could not malloc principal\n"));
1769                 return False;
1770         }
1771
1772         memcpy(principal, spnego.negTokenInit.mechListMIC.data,
1773                spnego.negTokenInit.mechListMIC.length);
1774         principal[spnego.negTokenInit.mechListMIC.length] = '\0';
1775
1776         retval = cli_krb5_get_ticket(ctx, principal, 0,
1777                                           &tkt, &session_key_krb5,
1778                                           0, NULL, NULL, NULL);
1779         if (retval) {
1780                 char *user = NULL;
1781
1782                 /* Let's try to first get the TGT, for that we need a
1783                    password. */
1784
1785                 if (opt_password == NULL) {
1786                         DEBUG(10, ("Requesting password\n"));
1787                         x_fprintf(x_stdout, "PW\n");
1788                         return True;
1789                 }
1790
1791                 user = talloc_asprintf(talloc_tos(), "%s@%s", opt_username, opt_domain);
1792                 if (!user) {
1793                         return false;
1794                 }
1795
1796                 if ((retval = kerberos_kinit_password(user, opt_password, 0, NULL))) {
1797                         DEBUG(10, ("Requesting TGT failed: %s\n", error_message(retval)));
1798                         return False;
1799                 }
1800
1801                 retval = cli_krb5_get_ticket(ctx, principal, 0,
1802                                                   &tkt, &session_key_krb5,
1803                                                   0, NULL, NULL, NULL);
1804                 if (retval) {
1805                         DEBUG(10, ("Kinit suceeded, but getting a ticket failed: %s\n", error_message(retval)));
1806                         return False;
1807                 }
1808         }
1809
1810         data_blob_free(&session_key_krb5);
1811
1812         ZERO_STRUCT(reply);
1813
1814         reply.type = SPNEGO_NEG_TOKEN_INIT;
1815         reply.negTokenInit.mechTypes = my_mechs;
1816         reply.negTokenInit.reqFlags = data_blob_null;
1817         reply.negTokenInit.reqFlagsPadding = 0;
1818         reply.negTokenInit.mechToken = tkt;
1819         reply.negTokenInit.mechListMIC = data_blob_null;
1820
1821         len = spnego_write_data(ctx, &to_server, &reply);
1822         data_blob_free(&tkt);
1823
1824         if (len == -1) {
1825                 DEBUG(1, ("Could not write SPNEGO data blob\n"));
1826                 return False;
1827         }
1828
1829         reply_base64 = base64_encode_data_blob(talloc_tos(), to_server);
1830         x_fprintf(x_stdout, "KK %s *\n", reply_base64);
1831
1832         TALLOC_FREE(reply_base64);
1833         data_blob_free(&to_server);
1834         DEBUG(10, ("sent GSS-SPNEGO KERBEROS5 negTokenInit\n"));
1835         return True;
1836 }
1837
1838 static void manage_client_krb5_targ(struct spnego_data spnego)
1839 {
1840         switch (spnego.negTokenTarg.negResult) {
1841         case SPNEGO_ACCEPT_INCOMPLETE:
1842                 DEBUG(1, ("Got a Kerberos negTokenTarg with ACCEPT_INCOMPLETE\n"));
1843                 x_fprintf(x_stdout, "BH Got a Kerberos negTokenTarg with "
1844                                     "ACCEPT_INCOMPLETE\n");
1845                 break;
1846         case SPNEGO_ACCEPT_COMPLETED:
1847                 DEBUG(10, ("Accept completed\n"));
1848                 x_fprintf(x_stdout, "AF\n");
1849                 break;
1850         case SPNEGO_REJECT:
1851                 DEBUG(10, ("Rejected\n"));
1852                 x_fprintf(x_stdout, "NA\n");
1853                 break;
1854         default:
1855                 DEBUG(1, ("Got an invalid negTokenTarg\n"));
1856                 x_fprintf(x_stdout, "AF\n");
1857         }
1858 }
1859
1860 #endif
1861
1862 static void manage_gss_spnego_client_request(struct ntlm_auth_state *state,
1863                                                 char *buf, int length)
1864 {
1865         DATA_BLOB request;
1866         struct spnego_data spnego;
1867         ssize_t len;
1868         TALLOC_CTX *ctx = talloc_tos();
1869
1870         if (!opt_username || !*opt_username) {
1871                 x_fprintf(x_stderr, "username must be specified!\n\n");
1872                 exit(1);
1873         }
1874
1875         if (strlen(buf) <= 3) {
1876                 DEBUG(1, ("SPNEGO query [%s] too short\n", buf));
1877                 x_fprintf(x_stdout, "BH SPNEGO query too short\n");
1878                 return;
1879         }
1880
1881         request = base64_decode_data_blob(buf+3);
1882
1883         if (strncmp(buf, "PW ", 3) == 0) {
1884
1885                 /* We asked for a password and obviously got it :-) */
1886
1887                 opt_password = SMB_STRNDUP((const char *)request.data, request.length);
1888
1889                 if (opt_password == NULL) {
1890                         DEBUG(1, ("Out of memory\n"));
1891                         x_fprintf(x_stdout, "BH Out of memory\n");
1892                         data_blob_free(&request);
1893                         return;
1894                 }
1895
1896                 x_fprintf(x_stdout, "OK\n");
1897                 data_blob_free(&request);
1898                 return;
1899         }
1900
1901         if ( (strncmp(buf, "TT ", 3) != 0) &&
1902              (strncmp(buf, "AF ", 3) != 0) &&
1903              (strncmp(buf, "NA ", 3) != 0) ) {
1904                 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
1905                 x_fprintf(x_stdout, "BH SPNEGO request invalid\n");
1906                 data_blob_free(&request);
1907                 return;
1908         }
1909
1910         /* So we got a server challenge to generate a SPNEGO
1911            client-to-server request... */
1912
1913         len = spnego_read_data(ctx, request, &spnego);
1914         data_blob_free(&request);
1915
1916         if (len == -1) {
1917                 DEBUG(1, ("Could not read SPNEGO data for [%s]\n", buf));
1918                 x_fprintf(x_stdout, "BH Could not read SPNEGO data\n");
1919                 return;
1920         }
1921
1922         if (spnego.type == SPNEGO_NEG_TOKEN_INIT) {
1923
1924                 /* The server offers a list of mechanisms */
1925
1926                 const char **mechType = (const char **)spnego.negTokenInit.mechTypes;
1927
1928                 while (*mechType != NULL) {
1929
1930 #ifdef HAVE_KRB5
1931                         if ( (strcmp(*mechType, OID_KERBEROS5_OLD) == 0) ||
1932                              (strcmp(*mechType, OID_KERBEROS5) == 0) ) {
1933                                 if (manage_client_krb5_init(spnego))
1934                                         goto out;
1935                         }
1936 #endif
1937
1938                         if (strcmp(*mechType, OID_NTLMSSP) == 0) {
1939                                 if (manage_client_ntlmssp_init(spnego))
1940                                         goto out;
1941                         }
1942
1943                         mechType++;
1944                 }
1945
1946                 DEBUG(1, ("Server offered no compatible mechanism\n"));
1947                 x_fprintf(x_stdout, "BH Server offered no compatible mechanism\n");
1948                 return;
1949         }
1950
1951         if (spnego.type == SPNEGO_NEG_TOKEN_TARG) {
1952
1953                 if (spnego.negTokenTarg.supportedMech == NULL) {
1954                         /* On accept/reject Windows does not send the
1955                            mechanism anymore. Handle that here and
1956                            shut down the mechanisms. */
1957
1958                         switch (spnego.negTokenTarg.negResult) {
1959                         case SPNEGO_ACCEPT_COMPLETED:
1960                                 x_fprintf(x_stdout, "AF\n");
1961                                 break;
1962                         case SPNEGO_REJECT:
1963                                 x_fprintf(x_stdout, "NA\n");
1964                                 break;
1965                         default:
1966                                 DEBUG(1, ("Got a negTokenTarg with no mech and an "
1967                                           "unknown negResult: %d\n",
1968                                           spnego.negTokenTarg.negResult));
1969                                 x_fprintf(x_stdout, "BH Got a negTokenTarg with"
1970                                                     " no mech and an unknown "
1971                                                     "negResult\n");
1972                         }
1973
1974                         TALLOC_FREE(client_ntlmssp_state);
1975                         goto out;
1976                 }
1977
1978                 if (strcmp(spnego.negTokenTarg.supportedMech,
1979                            OID_NTLMSSP) == 0) {
1980                         manage_client_ntlmssp_targ(spnego);
1981                         goto out;
1982                 }
1983
1984 #if HAVE_KRB5
1985                 if (strcmp(spnego.negTokenTarg.supportedMech,
1986                            OID_KERBEROS5_OLD) == 0) {
1987                         manage_client_krb5_targ(spnego);
1988                         goto out;
1989                 }
1990 #endif
1991
1992         }
1993
1994         DEBUG(1, ("Got an SPNEGO token I could not handle [%s]!\n", buf));
1995         x_fprintf(x_stdout, "BH Got an SPNEGO token I could not handle\n");
1996         return;
1997
1998  out:
1999         spnego_free_data(&spnego);
2000         return;
2001 }
2002
2003 static void manage_ntlm_server_1_request(struct ntlm_auth_state *state,
2004                                                 char *buf, int length)
2005 {
2006         char *request, *parameter;
2007         static DATA_BLOB challenge;
2008         static DATA_BLOB lm_response;
2009         static DATA_BLOB nt_response;
2010         static char *full_username;
2011         static char *username;
2012         static char *domain;
2013         static char *plaintext_password;
2014         static bool ntlm_server_1_user_session_key;
2015         static bool ntlm_server_1_lm_session_key;
2016
2017         if (strequal(buf, ".")) {
2018                 if (!full_username && !username) {
2019                         x_fprintf(x_stdout, "Error: No username supplied!\n");
2020                 } else if (plaintext_password) {
2021                         /* handle this request as plaintext */
2022                         if (!full_username) {
2023                                 if (asprintf(&full_username, "%s%c%s", domain, winbind_separator(), username) == -1) {
2024                                         x_fprintf(x_stdout, "Error: Out of memory in asprintf!\n.\n");
2025                                         return;
2026                                 }
2027                         }
2028                         if (check_plaintext_auth(full_username, plaintext_password, False)) {
2029                                 x_fprintf(x_stdout, "Authenticated: Yes\n");
2030                         } else {
2031                                 x_fprintf(x_stdout, "Authenticated: No\n");
2032                         }
2033                 } else if (!lm_response.data && !nt_response.data) {
2034                         x_fprintf(x_stdout, "Error: No password supplied!\n");
2035                 } else if (!challenge.data) {
2036                         x_fprintf(x_stdout, "Error: No lanman-challenge supplied!\n");
2037                 } else {
2038                         char *error_string = NULL;
2039                         uchar lm_key[8];
2040                         uchar user_session_key[16];
2041                         uint32 flags = 0;
2042
2043                         if (full_username && !username) {
2044                                 fstring fstr_user;
2045                                 fstring fstr_domain;
2046
2047                                 if (!parse_ntlm_auth_domain_user(full_username, fstr_user, fstr_domain)) {
2048                                         /* username might be 'tainted', don't print into our new-line deleimianted stream */
2049                                         x_fprintf(x_stdout, "Error: Could not parse into domain and username\n");
2050                                 }
2051                                 SAFE_FREE(username);
2052                                 SAFE_FREE(domain);
2053                                 username = smb_xstrdup(fstr_user);
2054                                 domain = smb_xstrdup(fstr_domain);
2055                         }
2056
2057                         if (!domain) {
2058                                 domain = smb_xstrdup(get_winbind_domain());
2059                         }
2060
2061                         if (ntlm_server_1_lm_session_key)
2062                                 flags |= WBFLAG_PAM_LMKEY;
2063
2064                         if (ntlm_server_1_user_session_key)
2065                                 flags |= WBFLAG_PAM_USER_SESSION_KEY;
2066
2067                         if (!NT_STATUS_IS_OK(
2068                                     contact_winbind_auth_crap(username,
2069                                                               domain,
2070                                                               lp_netbios_name(),
2071                                                               &challenge,
2072                                                               &lm_response,
2073                                                               &nt_response,
2074                                                               flags,
2075                                                               lm_key,
2076                                                               user_session_key,
2077                                                               &error_string,
2078                                                               NULL))) {
2079
2080                                 x_fprintf(x_stdout, "Authenticated: No\n");
2081                                 x_fprintf(x_stdout, "Authentication-Error: %s\n.\n", error_string);
2082                         } else {
2083                                 static char zeros[16];
2084                                 char *hex_lm_key;
2085                                 char *hex_user_session_key;
2086
2087                                 x_fprintf(x_stdout, "Authenticated: Yes\n");
2088
2089                                 if (ntlm_server_1_lm_session_key
2090                                     && (memcmp(zeros, lm_key,
2091                                                sizeof(lm_key)) != 0)) {
2092                                         hex_lm_key = hex_encode_talloc(NULL,
2093                                                                 (const unsigned char *)lm_key,
2094                                                                 sizeof(lm_key));
2095                                         x_fprintf(x_stdout, "LANMAN-Session-Key: %s\n", hex_lm_key);
2096                                         TALLOC_FREE(hex_lm_key);
2097                                 }
2098
2099                                 if (ntlm_server_1_user_session_key
2100                                     && (memcmp(zeros, user_session_key,
2101                                                sizeof(user_session_key)) != 0)) {
2102                                         hex_user_session_key = hex_encode_talloc(NULL,
2103                                                                           (const unsigned char *)user_session_key,
2104                                                                           sizeof(user_session_key));
2105                                         x_fprintf(x_stdout, "User-Session-Key: %s\n", hex_user_session_key);
2106                                         TALLOC_FREE(hex_user_session_key);
2107                                 }
2108                         }
2109                         SAFE_FREE(error_string);
2110                 }
2111                 /* clear out the state */
2112                 challenge = data_blob_null;
2113                 nt_response = data_blob_null;
2114                 lm_response = data_blob_null;
2115                 SAFE_FREE(full_username);
2116                 SAFE_FREE(username);
2117                 SAFE_FREE(domain);
2118                 SAFE_FREE(plaintext_password);
2119                 ntlm_server_1_user_session_key = False;
2120                 ntlm_server_1_lm_session_key = False;
2121                 x_fprintf(x_stdout, ".\n");
2122
2123                 return;
2124         }
2125
2126         request = buf;
2127
2128         /* Indicates a base64 encoded structure */
2129         parameter = strstr_m(request, ":: ");
2130         if (!parameter) {
2131                 parameter = strstr_m(request, ": ");
2132
2133                 if (!parameter) {
2134                         DEBUG(0, ("Parameter not found!\n"));
2135                         x_fprintf(x_stdout, "Error: Parameter not found!\n.\n");
2136                         return;
2137                 }
2138
2139                 parameter[0] ='\0';
2140                 parameter++;
2141                 parameter[0] ='\0';
2142                 parameter++;
2143
2144         } else {
2145                 parameter[0] ='\0';
2146                 parameter++;
2147                 parameter[0] ='\0';
2148                 parameter++;
2149                 parameter[0] ='\0';
2150                 parameter++;
2151
2152                 base64_decode_inplace(parameter);
2153         }
2154
2155         if (strequal(request, "LANMAN-Challenge")) {
2156                 challenge = strhex_to_data_blob(NULL, parameter);
2157                 if (challenge.length != 8) {
2158                         x_fprintf(x_stdout, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
2159                                   parameter,
2160                                   (int)challenge.length);
2161                         challenge = data_blob_null;
2162                 }
2163         } else if (strequal(request, "NT-Response")) {
2164                 nt_response = strhex_to_data_blob(NULL, parameter);
2165                 if (nt_response.length < 24) {
2166                         x_fprintf(x_stdout, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
2167                                   parameter,
2168                                   (int)nt_response.length);
2169                         nt_response = data_blob_null;
2170                 }
2171         } else if (strequal(request, "LANMAN-Response")) {
2172                 lm_response = strhex_to_data_blob(NULL, parameter);
2173                 if (lm_response.length != 24) {
2174                         x_fprintf(x_stdout, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
2175                                   parameter,
2176                                   (int)lm_response.length);
2177                         lm_response = data_blob_null;
2178                 }
2179         } else if (strequal(request, "Password")) {
2180                 plaintext_password = smb_xstrdup(parameter);
2181         } else if (strequal(request, "NT-Domain")) {
2182                 domain = smb_xstrdup(parameter);
2183         } else if (strequal(request, "Username")) {
2184                 username = smb_xstrdup(parameter);
2185         } else if (strequal(request, "Full-Username")) {
2186                 full_username = smb_xstrdup(parameter);
2187         } else if (strequal(request, "Request-User-Session-Key")) {
2188                 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
2189         } else if (strequal(request, "Request-LanMan-Session-Key")) {
2190                 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
2191         } else {
2192                 x_fprintf(x_stdout, "Error: Unknown request %s\n.\n", request);
2193         }
2194 }
2195
2196 static void manage_ntlm_change_password_1_request(struct ntlm_auth_state *state,
2197                                                         char *buf, int length)
2198 {
2199         char *request, *parameter;
2200         static DATA_BLOB new_nt_pswd;
2201         static DATA_BLOB old_nt_hash_enc;
2202         static DATA_BLOB new_lm_pswd;
2203         static DATA_BLOB old_lm_hash_enc;
2204         static char *full_username = NULL;
2205         static char *username = NULL;
2206         static char *domain = NULL;
2207         static char *newpswd =  NULL;
2208         static char *oldpswd = NULL;
2209
2210         if (strequal(buf, ".")) {
2211                 if(newpswd && oldpswd) {
2212                         uchar old_nt_hash[16];
2213                         uchar old_lm_hash[16];
2214                         uchar new_nt_hash[16];
2215                         uchar new_lm_hash[16];
2216
2217                         new_nt_pswd = data_blob(NULL, 516);
2218                         old_nt_hash_enc = data_blob(NULL, 16);
2219
2220                         /* Calculate the MD4 hash (NT compatible) of the
2221                          * password */
2222                         E_md4hash(oldpswd, old_nt_hash);
2223                         E_md4hash(newpswd, new_nt_hash);
2224
2225                         /* E_deshash returns false for 'long'
2226                            passwords (> 14 DOS chars).
2227
2228                            Therefore, don't send a buffer
2229                            encrypted with the truncated hash
2230                            (it could allow an even easier
2231                            attack on the password)
2232
2233                            Likewise, obey the admin's restriction
2234                         */
2235
2236                         if (lp_client_lanman_auth() &&
2237                             E_deshash(newpswd, new_lm_hash) &&
2238                             E_deshash(oldpswd, old_lm_hash)) {
2239                                 new_lm_pswd = data_blob(NULL, 516);
2240                                 old_lm_hash_enc = data_blob(NULL, 16);
2241                                 encode_pw_buffer(new_lm_pswd.data, newpswd,
2242                                                  STR_UNICODE);
2243
2244                                 arcfour_crypt(new_lm_pswd.data, old_nt_hash, 516);
2245                                 E_old_pw_hash(new_nt_hash, old_lm_hash,
2246                                               old_lm_hash_enc.data);
2247                         } else {
2248                                 new_lm_pswd.data = NULL;
2249                                 new_lm_pswd.length = 0;
2250                                 old_lm_hash_enc.data = NULL;
2251                                 old_lm_hash_enc.length = 0;
2252                         }
2253
2254                         encode_pw_buffer(new_nt_pswd.data, newpswd,
2255                                          STR_UNICODE);
2256
2257                         arcfour_crypt(new_nt_pswd.data, old_nt_hash, 516);
2258                         E_old_pw_hash(new_nt_hash, old_nt_hash,
2259                                       old_nt_hash_enc.data);
2260                 }
2261
2262                 if (!full_username && !username) {
2263                         x_fprintf(x_stdout, "Error: No username supplied!\n");
2264                 } else if ((!new_nt_pswd.data || !old_nt_hash_enc.data) &&
2265                            (!new_lm_pswd.data || old_lm_hash_enc.data) ) {
2266                         x_fprintf(x_stdout, "Error: No NT or LM password "
2267                                   "blobs supplied!\n");
2268                 } else {
2269                         char *error_string = NULL;
2270
2271                         if (full_username && !username) {
2272                                 fstring fstr_user;
2273                                 fstring fstr_domain;
2274
2275                                 if (!parse_ntlm_auth_domain_user(full_username,
2276                                                                  fstr_user,
2277                                                                  fstr_domain)) {
2278                                         /* username might be 'tainted', don't
2279                                          * print into our new-line
2280                                          * deleimianted stream */
2281                                         x_fprintf(x_stdout, "Error: Could not "
2282                                                   "parse into domain and "
2283                                                   "username\n");
2284                                         SAFE_FREE(username);
2285                                         username = smb_xstrdup(full_username);
2286                                 } else {
2287                                         SAFE_FREE(username);
2288                                         SAFE_FREE(domain);
2289                                         username = smb_xstrdup(fstr_user);
2290                                         domain = smb_xstrdup(fstr_domain);
2291                                 }
2292
2293                         }
2294
2295                         if(!NT_STATUS_IS_OK(contact_winbind_change_pswd_auth_crap(
2296                                                     username, domain,
2297                                                     new_nt_pswd,
2298                                                     old_nt_hash_enc,
2299                                                     new_lm_pswd,
2300                                                     old_lm_hash_enc,
2301                                                     &error_string))) {
2302                                 x_fprintf(x_stdout, "Password-Change: No\n");
2303                                 x_fprintf(x_stdout, "Password-Change-Error: "
2304                                           "%s\n.\n", error_string);
2305                         } else {
2306                                 x_fprintf(x_stdout, "Password-Change: Yes\n");
2307                         }
2308
2309                         SAFE_FREE(error_string);
2310                 }
2311                 /* clear out the state */
2312                 new_nt_pswd = data_blob_null;
2313                 old_nt_hash_enc = data_blob_null;
2314                 new_lm_pswd = data_blob_null;
2315                 old_nt_hash_enc = data_blob_null;
2316                 SAFE_FREE(full_username);
2317                 SAFE_FREE(username);
2318                 SAFE_FREE(domain);
2319                 SAFE_FREE(newpswd);
2320                 SAFE_FREE(oldpswd);
2321                 x_fprintf(x_stdout, ".\n");
2322
2323                 return;
2324         }
2325
2326         request = buf;
2327
2328         /* Indicates a base64 encoded structure */
2329         parameter = strstr_m(request, ":: ");
2330         if (!parameter) {
2331                 parameter = strstr_m(request, ": ");
2332
2333                 if (!parameter) {
2334                         DEBUG(0, ("Parameter not found!\n"));
2335                         x_fprintf(x_stdout, "Error: Parameter not found!\n.\n");
2336                         return;
2337                 }
2338
2339                 parameter[0] ='\0';
2340                 parameter++;
2341                 parameter[0] ='\0';
2342                 parameter++;
2343         } else {
2344                 parameter[0] ='\0';
2345                 parameter++;
2346                 parameter[0] ='\0';
2347                 parameter++;
2348                 parameter[0] ='\0';
2349                 parameter++;
2350
2351                 base64_decode_inplace(parameter);
2352         }
2353
2354         if (strequal(request, "new-nt-password-blob")) {
2355                 new_nt_pswd = strhex_to_data_blob(NULL, parameter);
2356                 if (new_nt_pswd.length != 516) {
2357                         x_fprintf(x_stdout, "Error: hex decode of %s failed! "
2358                                   "(got %d bytes, expected 516)\n.\n",
2359                                   parameter,
2360                                   (int)new_nt_pswd.length);
2361                         new_nt_pswd = data_blob_null;
2362                 }
2363         } else if (strequal(request, "old-nt-hash-blob")) {
2364                 old_nt_hash_enc = strhex_to_data_blob(NULL, parameter);
2365                 if (old_nt_hash_enc.length != 16) {
2366                         x_fprintf(x_stdout, "Error: hex decode of %s failed! "
2367                                   "(got %d bytes, expected 16)\n.\n",
2368                                   parameter,
2369                                   (int)old_nt_hash_enc.length);
2370                         old_nt_hash_enc = data_blob_null;
2371                 }
2372         } else if (strequal(request, "new-lm-password-blob")) {
2373                 new_lm_pswd = strhex_to_data_blob(NULL, parameter);
2374                 if (new_lm_pswd.length != 516) {
2375                         x_fprintf(x_stdout, "Error: hex decode of %s failed! "
2376                                   "(got %d bytes, expected 516)\n.\n",
2377                                   parameter,
2378                                   (int)new_lm_pswd.length);
2379                         new_lm_pswd = data_blob_null;
2380                 }
2381         }
2382         else if (strequal(request, "old-lm-hash-blob")) {
2383                 old_lm_hash_enc = strhex_to_data_blob(NULL, parameter);
2384                 if (old_lm_hash_enc.length != 16)
2385                 {
2386                         x_fprintf(x_stdout, "Error: hex decode of %s failed! "
2387                                   "(got %d bytes, expected 16)\n.\n",
2388                                   parameter,
2389                                   (int)old_lm_hash_enc.length);
2390                         old_lm_hash_enc = data_blob_null;
2391                 }
2392         } else if (strequal(request, "nt-domain")) {
2393                 domain = smb_xstrdup(parameter);
2394         } else if(strequal(request, "username")) {
2395                 username = smb_xstrdup(parameter);
2396         } else if(strequal(request, "full-username")) {
2397                 username = smb_xstrdup(parameter);
2398         } else if(strequal(request, "new-password")) {
2399                 newpswd = smb_xstrdup(parameter);
2400         } else if (strequal(request, "old-password")) {
2401                 oldpswd = smb_xstrdup(parameter);
2402         } else {
2403                 x_fprintf(x_stdout, "Error: Unknown request %s\n.\n", request);
2404         }
2405 }
2406
2407 static void manage_squid_request(struct ntlm_auth_state *state,
2408                 stdio_helper_function fn)
2409 {
2410         char *buf;
2411         char tmp[INITIAL_BUFFER_SIZE+1];
2412         int length, buf_size = 0;
2413         char *c;
2414
2415         buf = talloc_strdup(state->mem_ctx, "");
2416         if (!buf) {
2417                 DEBUG(0, ("Failed to allocate input buffer.\n"));
2418                 x_fprintf(x_stderr, "ERR\n");
2419                 exit(1);
2420         }
2421
2422         do {
2423
2424                 /* this is not a typo - x_fgets doesn't work too well under
2425                  * squid */
2426                 if (fgets(tmp, sizeof(tmp)-1, stdin) == NULL) {
2427                         if (ferror(stdin)) {
2428                                 DEBUG(1, ("fgets() failed! dying..... errno=%d "
2429                                           "(%s)\n", ferror(stdin),
2430                                           strerror(ferror(stdin))));
2431
2432                                 exit(1);
2433                         }
2434                         exit(0);
2435                 }
2436
2437                 buf = talloc_strdup_append_buffer(buf, tmp);
2438                 buf_size += INITIAL_BUFFER_SIZE;
2439
2440                 if (buf_size > MAX_BUFFER_SIZE) {
2441                         DEBUG(2, ("Oversized message\n"));
2442                         x_fprintf(x_stderr, "ERR\n");
2443                         talloc_free(buf);
2444                         return;
2445                 }
2446
2447                 c = strchr(buf, '\n');
2448         } while (c == NULL);
2449
2450         *c = '\0';
2451         length = c-buf;
2452
2453         DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
2454
2455         if (buf[0] == '\0') {
2456                 DEBUG(2, ("Invalid Request\n"));
2457                 x_fprintf(x_stderr, "ERR\n");
2458                 talloc_free(buf);
2459                 return;
2460         }
2461
2462         fn(state, buf, length);
2463         talloc_free(buf);
2464 }
2465
2466
2467 static void squid_stream(enum stdio_helper_mode stdio_mode, stdio_helper_function fn) {
2468         TALLOC_CTX *mem_ctx;
2469         struct ntlm_auth_state *state;
2470
2471         /* initialize FDescs */
2472         x_setbuf(x_stdout, NULL);
2473         x_setbuf(x_stderr, NULL);
2474
2475         mem_ctx = talloc_init("ntlm_auth");
2476         if (!mem_ctx) {
2477                 DEBUG(0, ("squid_stream: Failed to create talloc context\n"));
2478                 x_fprintf(x_stderr, "ERR\n");
2479                 exit(1);
2480         }
2481
2482         state = talloc_zero(mem_ctx, struct ntlm_auth_state);
2483         if (!state) {
2484                 DEBUG(0, ("squid_stream: Failed to talloc ntlm_auth_state\n"));
2485                 x_fprintf(x_stderr, "ERR\n");
2486                 exit(1);
2487         }
2488
2489         state->mem_ctx = mem_ctx;
2490         state->helper_mode = stdio_mode;
2491
2492         while(1) {
2493                 TALLOC_CTX *frame = talloc_stackframe();
2494                 manage_squid_request(state, fn);
2495                 TALLOC_FREE(frame);
2496         }
2497 }
2498
2499
2500 /* Authenticate a user with a challenge/response */
2501
2502 static bool check_auth_crap(void)
2503 {
2504         NTSTATUS nt_status;
2505         uint32 flags = 0;
2506         char lm_key[8];
2507         char user_session_key[16];
2508         char *hex_lm_key;
2509         char *hex_user_session_key;
2510         char *error_string;
2511         static uint8 zeros[16];
2512
2513         x_setbuf(x_stdout, NULL);
2514
2515         if (request_lm_key)
2516                 flags |= WBFLAG_PAM_LMKEY;
2517
2518         if (request_user_session_key)
2519                 flags |= WBFLAG_PAM_USER_SESSION_KEY;
2520
2521         flags |= WBFLAG_PAM_NT_STATUS_SQUASH;
2522
2523         nt_status = contact_winbind_auth_crap(opt_username, opt_domain,
2524                                               opt_workstation,
2525                                               &opt_challenge,
2526                                               &opt_lm_response,
2527                                               &opt_nt_response,
2528                                               flags,
2529                                               (unsigned char *)lm_key,
2530                                               (unsigned char *)user_session_key,
2531                                               &error_string, NULL);
2532
2533         if (!NT_STATUS_IS_OK(nt_status)) {
2534                 x_fprintf(x_stdout, "%s (0x%x)\n",
2535                           error_string,
2536                           NT_STATUS_V(nt_status));
2537                 SAFE_FREE(error_string);
2538                 return False;
2539         }
2540
2541         if (request_lm_key
2542             && (memcmp(zeros, lm_key,
2543                        sizeof(lm_key)) != 0)) {
2544                 hex_lm_key = hex_encode_talloc(talloc_tos(), (const unsigned char *)lm_key,
2545                                         sizeof(lm_key));
2546                 x_fprintf(x_stdout, "LM_KEY: %s\n", hex_lm_key);
2547                 TALLOC_FREE(hex_lm_key);
2548         }
2549         if (request_user_session_key
2550             && (memcmp(zeros, user_session_key,
2551                        sizeof(user_session_key)) != 0)) {
2552                 hex_user_session_key = hex_encode_talloc(talloc_tos(), (const unsigned char *)user_session_key,
2553                                                   sizeof(user_session_key));
2554                 x_fprintf(x_stdout, "NT_KEY: %s\n", hex_user_session_key);
2555                 TALLOC_FREE(hex_user_session_key);
2556         }
2557
2558         return True;
2559 }
2560
2561 /* Main program */
2562
2563 enum {
2564         OPT_USERNAME = 1000,
2565         OPT_DOMAIN,
2566         OPT_WORKSTATION,
2567         OPT_CHALLENGE,
2568         OPT_RESPONSE,
2569         OPT_LM,
2570         OPT_NT,
2571         OPT_PASSWORD,
2572         OPT_LM_KEY,
2573         OPT_USER_SESSION_KEY,
2574         OPT_DIAGNOSTICS,
2575         OPT_REQUIRE_MEMBERSHIP,
2576         OPT_USE_CACHED_CREDS,
2577         OPT_PAM_WINBIND_CONF
2578 };
2579
2580  int main(int argc, const char **argv)
2581 {
2582         TALLOC_CTX *frame = talloc_stackframe();
2583         int opt;
2584         static const char *helper_protocol;
2585         static int diagnostics;
2586
2587         static const char *hex_challenge;
2588         static const char *hex_lm_response;
2589         static const char *hex_nt_response;
2590
2591         poptContext pc;
2592
2593         /* NOTE: DO NOT change this interface without considering the implications!
2594            This is an external interface, which other programs will use to interact
2595            with this helper.
2596         */
2597
2598         /* We do not use single-letter command abbreviations, because they harm future
2599            interface stability. */
2600
2601         struct poptOption long_options[] = {
2602                 POPT_AUTOHELP
2603                 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
2604                 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_USERNAME, "username"},
2605                 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
2606                 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
2607                 { "challenge", 0, POPT_ARG_STRING, &hex_challenge, OPT_CHALLENGE, "challenge (HEX encoded)"},
2608                 { "lm-response", 0, POPT_ARG_STRING, &hex_lm_response, OPT_LM, "LM Response to the challenge (HEX encoded)"},
2609                 { "nt-response", 0, POPT_ARG_STRING, &hex_nt_response, OPT_NT, "NT or NTLMv2 Response to the challenge (HEX encoded)"},
2610                 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
2611                 { "request-lm-key", 0, POPT_ARG_NONE, &request_lm_key, OPT_LM_KEY, "Retrieve LM session key"},
2612                 { "request-nt-key", 0, POPT_ARG_NONE, &request_user_session_key, OPT_USER_SESSION_KEY, "Retrieve User (NT) session key"},
2613                 { "use-cached-creds", 0, POPT_ARG_NONE, &use_cached_creds, OPT_USE_CACHED_CREDS, "Use cached credentials if no password is given"},
2614                 { "diagnostics", 0, POPT_ARG_NONE, &diagnostics,
2615                   OPT_DIAGNOSTICS,
2616                   "Perform diagnostics on the authentication chain"},
2617                 { "require-membership-of", 0, POPT_ARG_STRING, &require_membership_of, OPT_REQUIRE_MEMBERSHIP, "Require that a user be a member of this group (either name or SID) for authentication to succeed" },
2618                 { "pam-winbind-conf", 0, POPT_ARG_STRING, &opt_pam_winbind_conf, OPT_PAM_WINBIND_CONF, "Require that request must set WBFLAG_PAM_CONTACT_TRUSTDOM when krb5 auth is required" },
2619                 POPT_COMMON_CONFIGFILE
2620                 POPT_COMMON_VERSION
2621                 POPT_TABLEEND
2622         };
2623
2624         /* Samba client initialisation */
2625         load_case_tables();
2626
2627         setup_logging("ntlm_auth", DEBUG_STDERR);
2628
2629         /* Parse options */
2630
2631         pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
2632
2633         /* Parse command line options */
2634
2635         if (argc == 1) {
2636                 poptPrintHelp(pc, stderr, 0);
2637                 return 1;
2638         }
2639
2640         while((opt = poptGetNextOpt(pc)) != -1) {
2641                 /* Get generic config options like --configfile */
2642         }
2643
2644         poptFreeContext(pc);
2645
2646         if (!lp_load_global(get_dyn_CONFIGFILE())) {
2647                 d_fprintf(stderr, "ntlm_auth: error opening config file %s. Error was %s\n",
2648                         get_dyn_CONFIGFILE(), strerror(errno));
2649                 exit(1);
2650         }
2651
2652         pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
2653                             POPT_CONTEXT_KEEP_FIRST);
2654
2655         while((opt = poptGetNextOpt(pc)) != -1) {
2656                 switch (opt) {
2657                 case OPT_CHALLENGE:
2658                         opt_challenge = strhex_to_data_blob(NULL, hex_challenge);
2659                         if (opt_challenge.length != 8) {
2660                                 x_fprintf(x_stderr, "hex decode of %s failed! (only got %d bytes)\n",
2661                                           hex_challenge,
2662                                           (int)opt_challenge.length);
2663                                 exit(1);
2664                         }
2665                         break;
2666                 case OPT_LM:
2667                         opt_lm_response = strhex_to_data_blob(NULL, hex_lm_response);
2668                         if (opt_lm_response.length != 24) {
2669                                 x_fprintf(x_stderr, "hex decode of %s failed! (only got %d bytes)\n",
2670                                           hex_lm_response,
2671                                           (int)opt_lm_response.length);
2672                                 exit(1);
2673                         }
2674                         break;
2675
2676                 case OPT_NT:
2677                         opt_nt_response = strhex_to_data_blob(NULL, hex_nt_response);
2678                         if (opt_nt_response.length < 24) {
2679                                 x_fprintf(x_stderr, "hex decode of %s failed! (only got %d bytes)\n",
2680                                           hex_nt_response,
2681                                           (int)opt_nt_response.length);
2682                                 exit(1);
2683                         }
2684                         break;
2685
2686                 case OPT_REQUIRE_MEMBERSHIP:
2687                         if (strncasecmp_m("S-", require_membership_of, 2) == 0) {
2688                                 require_membership_of_sid = require_membership_of;
2689                         }
2690                         break;
2691                 }
2692         }
2693
2694         if (opt_username) {
2695                 char *domain = SMB_STRDUP(opt_username);
2696                 char *p = strchr_m(domain, *lp_winbind_separator());
2697                 if (p) {
2698                         opt_username = p+1;
2699                         *p = '\0';
2700                         if (opt_domain && !strequal(opt_domain, domain)) {
2701                                 x_fprintf(x_stderr, "Domain specified in username (%s) "
2702                                         "doesn't match specified domain (%s)!\n\n",
2703                                         domain, opt_domain);
2704                                 poptPrintHelp(pc, stderr, 0);
2705                                 exit(1);
2706                         }
2707                         opt_domain = domain;
2708                 } else {
2709                         SAFE_FREE(domain);
2710                 }
2711         }
2712
2713         /* Note: if opt_domain is "" then send no domain */
2714         if (opt_domain == NULL) {
2715                 opt_domain = get_winbind_domain();
2716         }
2717
2718         if (opt_workstation == NULL) {
2719                 opt_workstation = "";
2720         }
2721
2722         if (helper_protocol) {
2723                 int i;
2724                 for (i=0; i<NUM_HELPER_MODES; i++) {
2725                         if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
2726                                 squid_stream(stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
2727                                 exit(0);
2728                         }
2729                 }
2730                 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
2731
2732                 for (i=0; i<NUM_HELPER_MODES; i++) {
2733                         x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
2734                 }
2735
2736                 exit(1);
2737         }
2738
2739         if (!opt_username || !*opt_username) {
2740                 x_fprintf(x_stderr, "username must be specified!\n\n");
2741                 poptPrintHelp(pc, stderr, 0);
2742                 exit(1);
2743         }
2744
2745         if (opt_challenge.length) {
2746                 if (!check_auth_crap()) {
2747                         exit(1);
2748                 }
2749                 exit(0);
2750         }
2751
2752         if (!opt_password) {
2753                 opt_password = getpass("password: ");
2754         }
2755
2756         if (diagnostics) {
2757                 if (!diagnose_ntlm_auth()) {
2758                         return 1;
2759                 }
2760         } else {
2761                 fstring user;
2762
2763                 fstr_sprintf(user, "%s%c%s", opt_domain, winbind_separator(), opt_username);
2764                 if (!check_plaintext_auth(user, opt_password, True)) {
2765                         return 1;
2766                 }
2767         }
2768
2769         /* Exit code */
2770
2771         poptFreeContext(pc);
2772         TALLOC_FREE(frame);
2773         return 0;
2774 }