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 "../libcli/auth/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 global_myname();
 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                                       global_myname(),
 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 = global_myname();
 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         /* Have we been given a local password, or should we ask winbind? */
 741         if (opt_password) {
 742                 (*ntlmssp_state)->check_password = local_pw_check;
 743         } else {
 744                 (*ntlmssp_state)->check_password = winbind_pw_check;
 745         }
 746         return NT_STATUS_OK;
 747 }
 748
 749 /*******************************************************************
 750  Used by firefox to drive NTLM auth to IIS servers.
 751 *******************************************************************/
 752
 753 static NTSTATUS do_ccache_ntlm_auth(DATA_BLOB initial_msg, DATA_BLOB challenge_msg,
 754                                 DATA_BLOB *reply)
 755 {
 756         struct winbindd_request wb_request;
 757         struct winbindd_response wb_response;
 758         int ctrl = 0;
 759         NSS_STATUS result;
 760
 761         /* get winbindd to do the ntlmssp step on our behalf */
 762         ZERO_STRUCT(wb_request);
 763         ZERO_STRUCT(wb_response);
 764
 765         /*
 766          * This is tricky here. If we set krb5_auth in pam_winbind.conf
 767          * creds for users in trusted domain will be stored the winbindd
 768          * child of the trusted domain. If we ask the primary domain for
 769          * ntlm_ccache_auth, it will fail. So, we have to ask the trusted
 770          * domain's child for ccache_ntlm_auth. that is to say, we have to
 771          * set WBFLAG_PAM_CONTACT_TRUSTDOM in request.flags.
 772          */
 773         ctrl = get_pam_winbind_config();
 774
 775         if (ctrl & WINBIND_KRB5_AUTH) {
 776                 wb_request.flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
 777         }
 778
 779         fstr_sprintf(wb_request.data.ccache_ntlm_auth.user,
 780                 "%s%c%s", opt_domain, winbind_separator(), opt_username);
 781         wb_request.data.ccache_ntlm_auth.uid = geteuid();
 782         wb_request.data.ccache_ntlm_auth.initial_blob_len = initial_msg.length;
 783         wb_request.data.ccache_ntlm_auth.challenge_blob_len = challenge_msg.length;
 784         wb_request.extra_len = initial_msg.length + challenge_msg.length;
 785
 786         if (wb_request.extra_len > 0) {
 787                 wb_request.extra_data.data = SMB_MALLOC_ARRAY(char, wb_request.extra_len);
 788                 if (wb_request.extra_data.data == NULL) {
 789                         return NT_STATUS_NO_MEMORY;
 790                 }
 791
 792                 memcpy(wb_request.extra_data.data, initial_msg.data, initial_msg.length);
 793                 memcpy(wb_request.extra_data.data + initial_msg.length,
 794                         challenge_msg.data, challenge_msg.length);
 795         }
 796
 797         result = winbindd_request_response(WINBINDD_CCACHE_NTLMAUTH, &wb_request, &wb_response);
 798         SAFE_FREE(wb_request.extra_data.data);
 799
 800         if (result != NSS_STATUS_SUCCESS) {
 801                 winbindd_free_response(&wb_response);
 802                 return NT_STATUS_UNSUCCESSFUL;
 803         }
 804
 805         if (reply) {
 806                 *reply = data_blob(wb_response.extra_data.data,
 807                                 wb_response.data.ccache_ntlm_auth.auth_blob_len);
 808                 if (wb_response.data.ccache_ntlm_auth.auth_blob_len > 0 &&
 809                                 reply->data == NULL) {
 810                         winbindd_free_response(&wb_response);
 811                         return NT_STATUS_NO_MEMORY;
 812                 }
 813         }
 814
 815         winbindd_free_response(&wb_response);
 816         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 817 }
 818
 819 static void manage_squid_ntlmssp_request_int(struct ntlm_auth_state *state,
 820                                              char *buf, int length,
 821                                              TALLOC_CTX *mem_ctx,
 822                                              char **response)
 823 {
 824         DATA_BLOB request, reply;
 825         NTSTATUS nt_status;
 826
 827         if (strlen(buf) < 2) {
 828                 DEBUG(1, ("NTLMSSP query [%s] invalid\n", buf));
 829                 *response = talloc_strdup(mem_ctx, "BH NTLMSSP query invalid");
 830                 return;
 831         }
 832
 833         if (strlen(buf) > 3) {
 834                 if(strncmp(buf, "SF ", 3) == 0){
 835                         DEBUG(10, ("Setting flags to negotioate\n"));
 836                         TALLOC_FREE(state->want_feature_list);
 837                         state->want_feature_list = talloc_strdup(state->mem_ctx,
 838                                         buf+3);
 839                         *response = talloc_strdup(mem_ctx, "OK");
 840                         return;
 841                 }
 842                 request = base64_decode_data_blob(buf + 3);
 843         } else {
 844                 request = data_blob_null;
 845         }
 846
 847         if ((strncmp(buf, "PW ", 3) == 0)) {
 848                 /* The calling application wants us to use a local password
 849                  * (rather than winbindd) */
 850
 851                 opt_password = SMB_STRNDUP((const char *)request.data,
 852                                 request.length);
 853
 854                 if (opt_password == NULL) {
 855                         DEBUG(1, ("Out of memory\n"));
 856                         *response = talloc_strdup(mem_ctx, "BH Out of memory");
 857                         data_blob_free(&request);
 858                         return;
 859                 }
 860
 861                 *response = talloc_strdup(mem_ctx, "OK");
 862                 data_blob_free(&request);
 863                 return;
 864         }
 865
 866         if (strncmp(buf, "YR", 2) == 0) {
 867                 TALLOC_FREE(state->ntlmssp_state);
 868                 state->svr_state = SERVER_INITIAL;
 869         } else if (strncmp(buf, "KK", 2) == 0) {
 870                 /* No special preprocessing required */
 871         } else if (strncmp(buf, "GF", 2) == 0) {
 872                 DEBUG(10, ("Requested negotiated NTLMSSP flags\n"));
 873
 874                 if (state->svr_state == SERVER_FINISHED) {
 875                         *response = talloc_asprintf(mem_ctx, "GF 0x%08x",
 876                                                  state->neg_flags);
 877                 }
 878                 else {
 879                         *response = talloc_strdup(mem_ctx, "BH\n");
 880                 }
 881                 data_blob_free(&request);
 882                 return;
 883         } else if (strncmp(buf, "GK", 2) == 0) {
 884                 DEBUG(10, ("Requested NTLMSSP session key\n"));
 885                 if(state->have_session_key) {
 886                         char *key64 = base64_encode_data_blob(state->mem_ctx,
 887                                         state->session_key);
 888                         *response = talloc_asprintf(mem_ctx, "GK %s",
 889                                                  key64 ? key64 : "<NULL>");
 890                         TALLOC_FREE(key64);
 891                 } else {
 892                         *response = talloc_strdup(mem_ctx, "BH");
 893                 }
 894
 895                 data_blob_free(&request);
 896                 return;
 897         } else {
 898                 DEBUG(1, ("NTLMSSP query [%s] invalid\n", buf));
 899                 *response = talloc_strdup(mem_ctx, "BH NTLMSSP query invalid");
 900                 return;
 901         }
 902
 903         if (!state->ntlmssp_state) {
 904                 nt_status = ntlm_auth_start_ntlmssp_server(
 905                                 &state->ntlmssp_state);
 906                 if (!NT_STATUS_IS_OK(nt_status)) {
 907                         *response = talloc_asprintf(
 908                                 mem_ctx, "BH %s", nt_errstr(nt_status));
 909                         return;
 910                 }
 911                 ntlmssp_want_feature_list(state->ntlmssp_state,
 912                                 state->want_feature_list);
 913         }
 914
 915         DEBUG(10, ("got NTLMSSP packet:\n"));
 916         dump_data(10, request.data, request.length);
 917
 918         nt_status = ntlmssp_update(state->ntlmssp_state, request, &reply);
 919
 920         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 921                 char *reply_base64 = base64_encode_data_blob(state->mem_ctx,
 922                                 reply);
 923                 *response = talloc_asprintf(mem_ctx, "TT %s", reply_base64);
 924                 TALLOC_FREE(reply_base64);
 925                 data_blob_free(&reply);
 926                 state->svr_state = SERVER_CHALLENGE;
 927                 DEBUG(10, ("NTLMSSP challenge\n"));
 928         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
 929                 *response = talloc_asprintf(mem_ctx, "BH %s",
 930                                          nt_errstr(nt_status));
 931                 DEBUG(0, ("NTLMSSP BH: %s\n", nt_errstr(nt_status)));
 932
 933                 TALLOC_FREE(state->ntlmssp_state);
 934         } else if (!NT_STATUS_IS_OK(nt_status)) {
 935                 *response = talloc_asprintf(mem_ctx, "NA %s",
 936                                          nt_errstr(nt_status));
 937                 DEBUG(10, ("NTLMSSP %s\n", nt_errstr(nt_status)));
 938         } else {
 939                 *response = talloc_asprintf(
 940                         mem_ctx, "AF %s",
 941                         (char *)state->ntlmssp_state->callback_private);
 942                 DEBUG(10, ("NTLMSSP OK!\n"));
 943
 944                 if(state->have_session_key)
 945                         data_blob_free(&state->session_key);
 946                 state->session_key = data_blob(
 947                                 state->ntlmssp_state->session_key.data,
 948                                 state->ntlmssp_state->session_key.length);
 949                 state->neg_flags = state->ntlmssp_state->neg_flags;
 950                 state->have_session_key = true;
 951                 state->svr_state = SERVER_FINISHED;
 952         }
 953
 954         data_blob_free(&request);
 955 }
 956
 957 static void manage_squid_ntlmssp_request(struct ntlm_auth_state *state,
 958                                          char *buf, int length)
 959 {
 960         char *response;
 961
 962         manage_squid_ntlmssp_request_int(state, buf, length,
 963                                          talloc_tos(), &response);
 964
 965         if (response == NULL) {
 966                 x_fprintf(x_stdout, "BH Out of memory\n");
 967                 return;
 968         }
 969         x_fprintf(x_stdout, "%s\n", response);
 970         TALLOC_FREE(response);
 971 }
 972
 973 static void manage_client_ntlmssp_request(struct ntlm_auth_state *state,
 974                                                 char *buf, int length)
 975 {
 976         DATA_BLOB request, reply;
 977         NTSTATUS nt_status;
 978
 979         if (!opt_username || !*opt_username) {
 980                 x_fprintf(x_stderr, "username must be specified!\n\n");
 981                 exit(1);
 982         }
 983
 984         if (strlen(buf) < 2) {
 985                 DEBUG(1, ("NTLMSSP query [%s] invalid\n", buf));
 986                 x_fprintf(x_stdout, "BH NTLMSSP query invalid\n");
 987                 return;
 988         }
 989
 990         if (strlen(buf) > 3) {
 991                 if(strncmp(buf, "SF ", 3) == 0) {
 992                         DEBUG(10, ("Looking for flags to negotiate\n"));
 993                         talloc_free(state->want_feature_list);
 994                         state->want_feature_list = talloc_strdup(state->mem_ctx,
 995                                         buf+3);
 996                         x_fprintf(x_stdout, "OK\n");
 997                         return;
 998                 }
 999                 request = base64_decode_data_blob(buf + 3);
1000         } else {
1001                 request = data_blob_null;
1002         }
1003
1004         if (strncmp(buf, "PW ", 3) == 0) {
1005                 /* We asked for a password and obviously got it :-) */
1006
1007                 opt_password = SMB_STRNDUP((const char *)request.data,
1008                                 request.length);
1009
1010                 if (opt_password == NULL) {
1011                         DEBUG(1, ("Out of memory\n"));
1012                         x_fprintf(x_stdout, "BH Out of memory\n");
1013                         data_blob_free(&request);
1014                         return;
1015                 }
1016
1017                 x_fprintf(x_stdout, "OK\n");
1018                 data_blob_free(&request);
1019                 return;
1020         }
1021
1022         if (!state->ntlmssp_state && use_cached_creds) {
1023                 /* check whether cached credentials are usable. */
1024                 DATA_BLOB empty_blob = data_blob_null;
1025
1026                 nt_status = do_ccache_ntlm_auth(empty_blob, empty_blob, NULL);
1027                 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1028                         /* failed to use cached creds */
1029                         use_cached_creds = False;
1030                 }
1031         }
1032
1033         if (opt_password == NULL && !use_cached_creds) {
1034                 /* Request a password from the calling process.  After
1035                    sending it, the calling process should retry asking for the
1036                    negotiate. */
1037
1038                 DEBUG(10, ("Requesting password\n"));
1039                 x_fprintf(x_stdout, "PW\n");
1040                 return;
1041         }
1042
1043         if (strncmp(buf, "YR", 2) == 0) {
1044                 TALLOC_FREE(state->ntlmssp_state);
1045                 state->cli_state = CLIENT_INITIAL;
1046         } else if (strncmp(buf, "TT", 2) == 0) {
1047                 /* No special preprocessing required */
1048         } else if (strncmp(buf, "GF", 2) == 0) {
1049                 DEBUG(10, ("Requested negotiated NTLMSSP flags\n"));
1050
1051                 if(state->cli_state == CLIENT_FINISHED) {
1052                         x_fprintf(x_stdout, "GF 0x%08x\n", state->neg_flags);
1053                 }
1054                 else {
1055                         x_fprintf(x_stdout, "BH\n");
1056                 }
1057
1058                 data_blob_free(&request);
1059                 return;
1060         } else if (strncmp(buf, "GK", 2) == 0 ) {
1061                 DEBUG(10, ("Requested session key\n"));
1062
1063                 if(state->cli_state == CLIENT_FINISHED) {
1064                         char *key64 = base64_encode_data_blob(state->mem_ctx,
1065                                         state->session_key);
1066                         x_fprintf(x_stdout, "GK %s\n", key64?key64:"<NULL>");
1067                         TALLOC_FREE(key64);
1068                 }
1069                 else {
1070                         x_fprintf(x_stdout, "BH\n");
1071                 }
1072
1073                 data_blob_free(&request);
1074                 return;
1075         } else {
1076                 DEBUG(1, ("NTLMSSP query [%s] invalid\n", buf));
1077                 x_fprintf(x_stdout, "BH NTLMSSP query invalid\n");
1078                 return;
1079         }
1080
1081         if (!state->ntlmssp_state) {
1082                 nt_status = ntlm_auth_start_ntlmssp_client(
1083                                 &state->ntlmssp_state);
1084                 if (!NT_STATUS_IS_OK(nt_status)) {
1085                         x_fprintf(x_stdout, "BH %s\n", nt_errstr(nt_status));
1086                         return;
1087                 }
1088                 ntlmssp_want_feature_list(state->ntlmssp_state,
1089                                 state->want_feature_list);
1090                 state->initial_message = data_blob_null;
1091         }
1092
1093         DEBUG(10, ("got NTLMSSP packet:\n"));
1094         dump_data(10, request.data, request.length);
1095
1096         if (use_cached_creds && !opt_password &&
1097                         (state->cli_state == CLIENT_RESPONSE)) {
1098                 nt_status = do_ccache_ntlm_auth(state->initial_message, request,
1099                                 &reply);
1100         } else {
1101                 nt_status = ntlmssp_update(state->ntlmssp_state, request,
1102                                 &reply);
1103         }
1104
1105         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1106                 char *reply_base64 = base64_encode_data_blob(state->mem_ctx,
1107                                 reply);
1108                 if (state->cli_state == CLIENT_INITIAL) {
1109                         x_fprintf(x_stdout, "YR %s\n", reply_base64);
1110                         state->initial_message = reply;
1111                         state->cli_state = CLIENT_RESPONSE;
1112                 } else {
1113                         x_fprintf(x_stdout, "KK %s\n", reply_base64);
1114                         data_blob_free(&reply);
1115                 }
1116                 TALLOC_FREE(reply_base64);
1117                 DEBUG(10, ("NTLMSSP challenge\n"));
1118         } else if (NT_STATUS_IS_OK(nt_status)) {
1119                 char *reply_base64 = base64_encode_data_blob(talloc_tos(),
1120                                 reply);
1121                 x_fprintf(x_stdout, "AF %s\n", reply_base64);
1122                 TALLOC_FREE(reply_base64);
1123
1124                 if(state->have_session_key)
1125                         data_blob_free(&state->session_key);
1126
1127                 state->session_key = data_blob(
1128                                 state->ntlmssp_state->session_key.data,
1129                                 state->ntlmssp_state->session_key.length);
1130                 state->neg_flags = state->ntlmssp_state->neg_flags;
1131                 state->have_session_key = true;
1132
1133                 DEBUG(10, ("NTLMSSP OK!\n"));
1134                 state->cli_state = CLIENT_FINISHED;
1135                 TALLOC_FREE(state->ntlmssp_state);
1136         } else {
1137                 x_fprintf(x_stdout, "BH %s\n", nt_errstr(nt_status));
1138                 DEBUG(0, ("NTLMSSP BH: %s\n", nt_errstr(nt_status)));
1139                 state->cli_state = CLIENT_ERROR;
1140                 TALLOC_FREE(state->ntlmssp_state);
1141         }
1142
1143         data_blob_free(&request);
1144 }
1145
1146 static void manage_squid_basic_request(struct ntlm_auth_state *state,
1147                                         char *buf, int length)
1148 {
1149         char *user, *pass;
1150         user=buf;
1151
1152         pass=(char *)memchr(buf,' ',length);
1153         if (!pass) {
1154                 DEBUG(2, ("Password not found. Denying access\n"));
1155                 x_fprintf(x_stdout, "ERR\n");
1156                 return;
1157         }
1158         *pass='\0';
1159         pass++;
1160
1161         if (state->helper_mode == SQUID_2_5_BASIC) {
1162                 rfc1738_unescape(user);
1163                 rfc1738_unescape(pass);
1164         }
1165
1166         if (check_plaintext_auth(user, pass, False)) {
1167                 x_fprintf(x_stdout, "OK\n");
1168         } else {
1169                 x_fprintf(x_stdout, "ERR\n");
1170         }
1171 }
1172
1173 static void offer_gss_spnego_mechs(void) {
1174
1175         DATA_BLOB token;
1176         struct spnego_data spnego;
1177         ssize_t len;
1178         char *reply_base64;
1179         TALLOC_CTX *ctx = talloc_tos();
1180         char *principal;
1181         char *myname_lower;
1182
1183         ZERO_STRUCT(spnego);
1184
1185         myname_lower = talloc_strdup(ctx, global_myname());
1186         if (!myname_lower) {
1187                 return;
1188         }
1189         strlower_m(myname_lower);
1190
1191         principal = talloc_asprintf(ctx, "%s$@%s", myname_lower, lp_realm());
1192         if (!principal) {
1193                 return;
1194         }
1195
1196         /* Server negTokenInit (mech offerings) */
1197         spnego.type = SPNEGO_NEG_TOKEN_INIT;
1198         spnego.negTokenInit.mechTypes = talloc_array(ctx, const char *, 4);
1199 #ifdef HAVE_KRB5
1200         spnego.negTokenInit.mechTypes[0] = talloc_strdup(ctx, OID_KERBEROS5_OLD);
1201         spnego.negTokenInit.mechTypes[1] = talloc_strdup(ctx, OID_KERBEROS5);
1202         spnego.negTokenInit.mechTypes[2] = talloc_strdup(ctx, OID_NTLMSSP);
1203         spnego.negTokenInit.mechTypes[3] = NULL;
1204 #else
1205         spnego.negTokenInit.mechTypes[0] = talloc_strdup(ctx, OID_NTLMSSP);
1206         spnego.negTokenInit.mechTypes[1] = NULL;
1207 #endif
1208
1209
1210         spnego.negTokenInit.mechListMIC = data_blob_talloc(ctx, principal,
1211                                                     strlen(principal));
1212
1213         len = spnego_write_data(ctx, &token, &spnego);
1214         spnego_free_data(&spnego);
1215
1216         if (len == -1) {
1217                 DEBUG(1, ("Could not write SPNEGO data blob\n"));
1218                 x_fprintf(x_stdout, "BH Could not write SPNEGO data blob\n");
1219                 return;
1220         }
1221
1222         reply_base64 = base64_encode_data_blob(talloc_tos(), token);
1223         x_fprintf(x_stdout, "TT %s *\n", reply_base64);
1224
1225         TALLOC_FREE(reply_base64);
1226         data_blob_free(&token);
1227         DEBUG(10, ("sent SPNEGO negTokenInit\n"));
1228         return;
1229 }
1230
1231 bool spnego_parse_krb5_wrap(TALLOC_CTX *ctx, DATA_BLOB blob, DATA_BLOB *ticket, uint8 tok_id[2])
1232 {
1233         bool ret;
1234         ASN1_DATA *data;
1235         int data_remaining;
1236
1237         data = asn1_init(talloc_tos());
1238         if (data == NULL) {
1239                 return false;
1240         }
1241
1242         asn1_load(data, blob);
1243         asn1_start_tag(data, ASN1_APPLICATION(0));
1244         asn1_check_OID(data, OID_KERBEROS5);
1245
1246         data_remaining = asn1_tag_remaining(data);
1247
1248         if (data_remaining < 3) {
1249                 data->has_error = True;
1250         } else {
1251                 asn1_read(data, tok_id, 2);
1252                 data_remaining -= 2;
1253                 *ticket = data_blob_talloc(ctx, NULL, data_remaining);
1254                 asn1_read(data, ticket->data, ticket->length);
1255         }
1256
1257         asn1_end_tag(data);
1258
1259         ret = !data->has_error;
1260
1261         if (data->has_error) {
1262                 data_blob_free(ticket);
1263         }
1264
1265         asn1_free(data);
1266
1267         return ret;
1268 }
1269
1270 static void manage_gss_spnego_request(struct ntlm_auth_state *state,
1271                                         char *buf, int length)
1272 {
1273         struct spnego_data request, response;
1274         DATA_BLOB token;
1275         DATA_BLOB raw_in_token = data_blob_null;
1276         DATA_BLOB raw_out_token = data_blob_null;
1277         NTSTATUS status;
1278         ssize_t len;
1279         TALLOC_CTX *ctx = talloc_tos();
1280
1281         char *user = NULL;
1282         char *domain = NULL;
1283
1284         const char *reply_code;
1285         char       *reply_base64;
1286         char *reply_argument = NULL;
1287         char *supportedMech = NULL;
1288
1289         if (strlen(buf) < 2) {
1290                 DEBUG(1, ("SPENGO query [%s] invalid\n", buf));
1291                 x_fprintf(x_stdout, "BH SPENGO query invalid\n");
1292                 return;
1293         }
1294
1295         if (strncmp(buf, "YR", 2) == 0) {
1296                 TALLOC_FREE(state->ntlmssp_state);
1297                 TALLOC_FREE(state->spnego_mech);
1298                 TALLOC_FREE(state->spnego_mech_oid);
1299         } else if (strncmp(buf, "KK", 2) == 0) {
1300                 ;
1301         } else {
1302                 DEBUG(1, ("SPENGO query [%s] invalid\n", buf));
1303                 x_fprintf(x_stdout, "BH SPENGO query invalid\n");
1304                 return;
1305         }
1306
1307         if ( (strlen(buf) == 2)) {
1308
1309                 /* no client data, get the negTokenInit offering
1310                    mechanisms */
1311
1312                 offer_gss_spnego_mechs();
1313                 return;
1314         }
1315
1316         /* All subsequent requests have a blob. This might be negTokenInit or negTokenTarg */
1317
1318         if (strlen(buf) <= 3) {
1319                 DEBUG(1, ("GSS-SPNEGO query [%s] invalid\n", buf));
1320                 x_fprintf(x_stdout, "BH GSS-SPNEGO query invalid\n");
1321                 return;
1322         }
1323
1324         token = base64_decode_data_blob(buf + 3);
1325
1326         if ((token.length >= 7)
1327             && (strncmp((char *)token.data, "NTLMSSP", 7) == 0)) {
1328                 char *reply;
1329
1330                 data_blob_free(&token);
1331
1332                 DEBUG(10, ("Could not parse GSS-SPNEGO, trying raw "
1333                            "ntlmssp\n"));
1334
1335                 manage_squid_ntlmssp_request_int(state, buf, length,
1336                                                  talloc_tos(), &reply);
1337                 if (reply == NULL) {
1338                         x_fprintf(x_stdout, "BH Out of memory\n");
1339                         return;
1340                 }
1341
1342                 if (strncmp(reply, "AF ", 3) == 0) {
1343                         x_fprintf(x_stdout, "AF * %s\n", reply+3);
1344                 } else {
1345                         x_fprintf(x_stdout, "%s *\n", reply);
1346                 }
1347
1348                 TALLOC_FREE(reply);
1349                 return;
1350         }
1351
1352         ZERO_STRUCT(request);
1353         len = spnego_read_data(ctx, token, &request);
1354         data_blob_free(&token);
1355
1356         if (len == -1) {
1357                 DEBUG(1, ("GSS-SPNEGO query [%s] invalid\n", buf));
1358                 x_fprintf(x_stdout, "BH GSS-SPNEGO query invalid\n");
1359                 return;
1360         }
1361
1362         if (request.type == SPNEGO_NEG_TOKEN_INIT) {
1363 #ifdef HAVE_KRB5
1364                 int krb5_idx = -1;
1365 #endif
1366                 int ntlm_idx = -1;
1367                 int used_idx = -1;
1368                 int i;
1369
1370                 if (state->spnego_mech) {
1371                         DEBUG(1, ("Client restarted SPNEGO with NegTokenInit "
1372                                   "while mech[%s] was already negotiated\n",
1373                                   state->spnego_mech));
1374                         x_fprintf(x_stdout, "BH Client send NegTokenInit twice\n");
1375                         return;
1376                 }
1377
1378                 /* Second request from Client. This is where the
1379                    client offers its mechanism to use. */
1380
1381                 if ( (request.negTokenInit.mechTypes == NULL) ||
1382                      (request.negTokenInit.mechTypes[0] == NULL) ) {
1383                         DEBUG(1, ("Client did not offer any mechanism\n"));
1384                         x_fprintf(x_stdout, "BH Client did not offer any "
1385                                             "mechanism\n");
1386                         return;
1387                 }
1388
1389                 status = NT_STATUS_UNSUCCESSFUL;
1390                 for (i = 0; request.negTokenInit.mechTypes[i] != NULL; i++) {
1391                         DEBUG(10,("got mech[%d][%s]\n",
1392                                 i, request.negTokenInit.mechTypes[i]));
1393 #ifdef HAVE_KRB5
1394                         if (strcmp(request.negTokenInit.mechTypes[i], OID_KERBEROS5_OLD) == 0) {
1395                                 krb5_idx = i;
1396                                 break;
1397                         }
1398                         if (strcmp(request.negTokenInit.mechTypes[i], OID_KERBEROS5) == 0) {
1399                                 krb5_idx = i;
1400                                 break;
1401                         }
1402 #endif
1403                         if (strcmp(request.negTokenInit.mechTypes[i], OID_NTLMSSP) == 0) {
1404                                 ntlm_idx = i;
1405                                 break;
1406                         }
1407                 }
1408
1409                 used_idx = ntlm_idx;
1410 #ifdef HAVE_KRB5
1411                 if (krb5_idx != -1) {
1412                         ntlm_idx = -1;
1413                         used_idx = krb5_idx;
1414                 }
1415 #endif
1416                 if (ntlm_idx > -1) {
1417                         state->spnego_mech = talloc_strdup(state, "ntlmssp");
1418                         if (state->spnego_mech == NULL) {
1419                                 x_fprintf(x_stdout, "BH Out of memory\n");
1420                                 return;
1421                         }
1422
1423                         if (state->ntlmssp_state) {
1424                                 DEBUG(1, ("Client wants a new NTLMSSP challenge, but "
1425                                           "already got one\n"));
1426                                 x_fprintf(x_stdout, "BH Client wants a new "
1427                                                     "NTLMSSP challenge, but "
1428                                                     "already got one\n");
1429                                 TALLOC_FREE(state->ntlmssp_state);
1430                                 return;
1431                         }
1432
1433                         status = ntlm_auth_start_ntlmssp_server(&state->ntlmssp_state);
1434                         if (!NT_STATUS_IS_OK(status)) {
1435                                 x_fprintf(x_stdout, "BH %s\n", nt_errstr(status));
1436                                 return;
1437                         }
1438                 }
1439
1440 #ifdef HAVE_KRB5
1441                 if (krb5_idx > -1) {
1442                         state->spnego_mech = talloc_strdup(state, "krb5");
1443                         if (state->spnego_mech == NULL) {
1444                                 x_fprintf(x_stdout, "BH Out of memory\n");
1445                                 return;
1446                         }
1447                 }
1448 #endif
1449                 if (used_idx > -1) {
1450                         state->spnego_mech_oid = talloc_strdup(state,
1451                                 request.negTokenInit.mechTypes[used_idx]);
1452                         if (state->spnego_mech_oid == NULL) {
1453                                 x_fprintf(x_stdout, "BH Out of memory\n");
1454                                 return;
1455                         }
1456                         supportedMech = talloc_strdup(ctx, state->spnego_mech_oid);
1457                         if (supportedMech == NULL) {
1458                                 x_fprintf(x_stdout, "BH Out of memory\n");
1459                                 return;
1460                         }
1461
1462                         status = NT_STATUS_MORE_PROCESSING_REQUIRED;
1463                 } else {
1464                         status = NT_STATUS_NOT_SUPPORTED;
1465                 }
1466                 if (used_idx == 0) {
1467                         status = NT_STATUS_OK;
1468                         raw_in_token = request.negTokenInit.mechToken;
1469                 }
1470         } else {
1471                 if (state->spnego_mech == NULL) {
1472                         DEBUG(1,("Got netTokenTarg without negTokenInit\n"));
1473                         x_fprintf(x_stdout, "BH Got a negTokenTarg without "
1474                                             "negTokenInit\n");
1475                         return;
1476                 }
1477
1478                 if ((request.negTokenTarg.supportedMech != NULL) &&
1479                      (strcmp(request.negTokenTarg.supportedMech, state->spnego_mech_oid) != 0 ) ) {
1480                         DEBUG(1, ("Got a negTokenTarg with mech[%s] while [%s] was already negotiated\n",
1481                                   request.negTokenTarg.supportedMech,
1482                                   state->spnego_mech_oid));
1483                         x_fprintf(x_stdout, "BH Got a negTokenTarg with speficied mech\n");
1484                         return;
1485                 }
1486
1487                 status = NT_STATUS_OK;
1488                 raw_in_token = request.negTokenTarg.responseToken;
1489         }
1490
1491         if (!NT_STATUS_IS_OK(status)) {
1492                 /* error or more processing */
1493         } else if (strcmp(state->spnego_mech, "ntlmssp") == 0) {
1494
1495                 DEBUG(10, ("got NTLMSSP packet:\n"));
1496                 dump_data(10, raw_in_token.data, raw_in_token.length);
1497
1498                 status = ntlmssp_update(state->ntlmssp_state,
1499                                         raw_in_token,
1500                                         &raw_out_token);
1501                 if (NT_STATUS_IS_OK(status)) {
1502                         user = talloc_strdup(ctx, state->ntlmssp_state->user);
1503                         domain = talloc_strdup(ctx, state->ntlmssp_state->domain);
1504                 }
1505                 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1506                         TALLOC_FREE(state->ntlmssp_state);
1507                 }
1508 #ifdef HAVE_KRB5
1509         } else if (strcmp(state->spnego_mech, "krb5") == 0) {
1510                 char *principal;
1511                 DATA_BLOB ap_rep;
1512                 DATA_BLOB session_key;
1513                 struct PAC_LOGON_INFO *logon_info = NULL;
1514                 DATA_BLOB ticket;
1515                 uint8_t tok_id[2];
1516
1517                 if (!spnego_parse_krb5_wrap(ctx, raw_in_token,
1518                                             &ticket, tok_id)) {
1519                         DEBUG(1, ("spnego_parse_krb5_wrap failed\n"));
1520                         x_fprintf(x_stdout, "BH spnego_parse_krb5_wrap failed\n");
1521                         return;
1522                 }
1523
1524                 status = ads_verify_ticket(ctx, lp_realm(), 0,
1525                                            &ticket,
1526                                            &principal, &logon_info, &ap_rep,
1527                                            &session_key, True);
1528
1529                 /* Now in "principal" we have the name we are authenticated as. */
1530
1531                 if (NT_STATUS_IS_OK(status)) {
1532
1533                         domain = strchr_m(principal, '@');
1534
1535                         if (domain == NULL) {
1536                                 DEBUG(1, ("Did not get a valid principal "
1537                                           "from ads_verify_ticket\n"));
1538                                 x_fprintf(x_stdout, "BH Did not get a "
1539                                           "valid principal from "
1540                                           "ads_verify_ticket\n");
1541                                 return;
1542                         }
1543
1544                         *domain++ = '\0';
1545                         domain = talloc_strdup(ctx, domain);
1546                         user = talloc_strdup(ctx, principal);
1547
1548                         if (logon_info) {
1549                                 netsamlogon_cache_store(
1550                                         user, &logon_info->info3);
1551                         }
1552
1553                         data_blob_free(&ap_rep);
1554                         data_blob_free(&session_key);
1555                 }
1556                 data_blob_free(&ticket);
1557 #endif
1558         }
1559
1560         spnego_free_data(&request);
1561         ZERO_STRUCT(response);
1562         response.type = SPNEGO_NEG_TOKEN_TARG;
1563
1564         if (NT_STATUS_IS_OK(status)) {
1565                 TALLOC_FREE(state->spnego_mech);
1566                 TALLOC_FREE(state->spnego_mech_oid);
1567                 response.negTokenTarg.negResult = SPNEGO_ACCEPT_COMPLETED;
1568                 response.negTokenTarg.responseToken = raw_out_token;
1569                 reply_code = "AF";
1570                 reply_argument = talloc_asprintf(ctx, "%s\\%s", domain, user);
1571         } else if (NT_STATUS_EQUAL(status,
1572                                    NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1573                 response.negTokenTarg.supportedMech = supportedMech;
1574                 response.negTokenTarg.responseToken = raw_out_token;
1575                 response.negTokenTarg.negResult = SPNEGO_ACCEPT_INCOMPLETE;
1576                 reply_code = "TT";
1577                 reply_argument = talloc_strdup(ctx, "*");
1578         } else {
1579                 TALLOC_FREE(state->spnego_mech);
1580                 TALLOC_FREE(state->spnego_mech_oid);
1581                 data_blob_free(&raw_out_token);
1582                 response.negTokenTarg.negResult = SPNEGO_REJECT;
1583                 reply_code = "NA";
1584                 reply_argument = talloc_strdup(ctx, nt_errstr(status));
1585         }
1586
1587         if (!reply_argument) {
1588                 DEBUG(1, ("Could not write SPNEGO data blob\n"));
1589                 x_fprintf(x_stdout, "BH Could not write SPNEGO data blob\n");
1590                 spnego_free_data(&response);
1591                 return;
1592         }
1593
1594         len = spnego_write_data(ctx, &token, &response);
1595         spnego_free_data(&response);
1596
1597         if (len == -1) {
1598                 DEBUG(1, ("Could not write SPNEGO data blob\n"));
1599                 x_fprintf(x_stdout, "BH Could not write SPNEGO data blob\n");
1600                 return;
1601         }
1602
1603         reply_base64 = base64_encode_data_blob(talloc_tos(), token);
1604
1605         x_fprintf(x_stdout, "%s %s %s\n",
1606                   reply_code, reply_base64, reply_argument);
1607
1608         TALLOC_FREE(reply_base64);
1609         data_blob_free(&token);
1610
1611         return;
1612 }
1613
1614 static struct ntlmssp_state *client_ntlmssp_state = NULL;
1615
1616 static bool manage_client_ntlmssp_init(struct spnego_data spnego)
1617 {
1618         NTSTATUS status;
1619         DATA_BLOB null_blob = data_blob_null;
1620         DATA_BLOB to_server;
1621         char *to_server_base64;
1622         const char *my_mechs[] = {OID_NTLMSSP, NULL};
1623         TALLOC_CTX *ctx = talloc_tos();
1624
1625         DEBUG(10, ("Got spnego negTokenInit with NTLMSSP\n"));
1626
1627         if (client_ntlmssp_state != NULL) {
1628                 DEBUG(1, ("Request for initial SPNEGO request where "
1629                           "we already have a state\n"));
1630                 return False;
1631         }
1632
1633         if (!client_ntlmssp_state) {
1634                 if (!NT_STATUS_IS_OK(status = ntlm_auth_start_ntlmssp_client(&client_ntlmssp_state))) {
1635                         x_fprintf(x_stdout, "BH %s\n", nt_errstr(status));
1636                         return False;
1637                 }
1638         }
1639
1640
1641         if (opt_password == NULL) {
1642
1643                 /* Request a password from the calling process.  After
1644                    sending it, the calling process should retry with
1645                    the negTokenInit. */
1646
1647                 DEBUG(10, ("Requesting password\n"));
1648                 x_fprintf(x_stdout, "PW\n");
1649                 return True;
1650         }
1651
1652         spnego.type = SPNEGO_NEG_TOKEN_INIT;
1653         spnego.negTokenInit.mechTypes = my_mechs;
1654         spnego.negTokenInit.reqFlags = data_blob_null;
1655         spnego.negTokenInit.reqFlagsPadding = 0;
1656         spnego.negTokenInit.mechListMIC = null_blob;
1657
1658         status = ntlmssp_update(client_ntlmssp_state, null_blob,
1659                                        &spnego.negTokenInit.mechToken);
1660
1661         if ( !(NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) ||
1662                         NT_STATUS_IS_OK(status)) ) {
1663                 DEBUG(1, ("Expected OK or MORE_PROCESSING_REQUIRED, got: %s\n",
1664                           nt_errstr(status)));
1665                 TALLOC_FREE(client_ntlmssp_state);
1666                 return False;
1667         }
1668
1669         spnego_write_data(ctx, &to_server, &spnego);
1670         data_blob_free(&spnego.negTokenInit.mechToken);
1671
1672         to_server_base64 = base64_encode_data_blob(talloc_tos(), to_server);
1673         data_blob_free(&to_server);
1674         x_fprintf(x_stdout, "KK %s\n", to_server_base64);
1675         TALLOC_FREE(to_server_base64);
1676         return True;
1677 }
1678
1679 static void manage_client_ntlmssp_targ(struct spnego_data spnego)
1680 {
1681         NTSTATUS status;
1682         DATA_BLOB null_blob = data_blob_null;
1683         DATA_BLOB request;
1684         DATA_BLOB to_server;
1685         char *to_server_base64;
1686         TALLOC_CTX *ctx = talloc_tos();
1687
1688         DEBUG(10, ("Got spnego negTokenTarg with NTLMSSP\n"));
1689
1690         if (client_ntlmssp_state == NULL) {
1691                 DEBUG(1, ("Got NTLMSSP tArg without a client state\n"));
1692                 x_fprintf(x_stdout, "BH Got NTLMSSP tArg without a client state\n");
1693                 return;
1694         }
1695
1696         if (spnego.negTokenTarg.negResult == SPNEGO_REJECT) {
1697                 x_fprintf(x_stdout, "NA\n");
1698                 TALLOC_FREE(client_ntlmssp_state);
1699                 return;
1700         }
1701
1702         if (spnego.negTokenTarg.negResult == SPNEGO_ACCEPT_COMPLETED) {
1703                 x_fprintf(x_stdout, "AF\n");
1704                 TALLOC_FREE(client_ntlmssp_state);
1705                 return;
1706         }
1707
1708         status = ntlmssp_update(client_ntlmssp_state,
1709                                        spnego.negTokenTarg.responseToken,
1710                                        &request);
1711
1712         if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1713                 DEBUG(1, ("Expected MORE_PROCESSING_REQUIRED from "
1714                           "ntlmssp_client_update, got: %s\n",
1715                           nt_errstr(status)));
1716                 x_fprintf(x_stdout, "BH Expected MORE_PROCESSING_REQUIRED from "
1717                                     "ntlmssp_client_update\n");
1718                 data_blob_free(&request);
1719                 TALLOC_FREE(client_ntlmssp_state);
1720                 return;
1721         }
1722
1723         spnego.type = SPNEGO_NEG_TOKEN_TARG;
1724         spnego.negTokenTarg.negResult = SPNEGO_ACCEPT_INCOMPLETE;
1725         spnego.negTokenTarg.supportedMech = (const char *)OID_NTLMSSP;
1726         spnego.negTokenTarg.responseToken = request;
1727         spnego.negTokenTarg.mechListMIC = null_blob;
1728
1729         spnego_write_data(ctx, &to_server, &spnego);
1730         data_blob_free(&request);
1731
1732         to_server_base64 = base64_encode_data_blob(talloc_tos(), to_server);
1733         data_blob_free(&to_server);
1734         x_fprintf(x_stdout, "KK %s\n", to_server_base64);
1735         TALLOC_FREE(to_server_base64);
1736         return;
1737 }
1738
1739 #ifdef HAVE_KRB5
1740
1741 static bool manage_client_krb5_init(struct spnego_data spnego)
1742 {
1743         char *principal;
1744         DATA_BLOB tkt, to_server;
1745         DATA_BLOB session_key_krb5 = data_blob_null;
1746         struct spnego_data reply;
1747         char *reply_base64;
1748         int retval;
1749
1750         const char *my_mechs[] = {OID_KERBEROS5_OLD, NULL};
1751         ssize_t len;
1752         TALLOC_CTX *ctx = talloc_tos();
1753
1754         if ( (spnego.negTokenInit.mechListMIC.data == NULL) ||
1755              (spnego.negTokenInit.mechListMIC.length == 0) ) {
1756                 DEBUG(1, ("Did not get a principal for krb5\n"));
1757                 return False;
1758         }
1759
1760         principal = (char *)SMB_MALLOC(
1761                 spnego.negTokenInit.mechListMIC.length+1);
1762
1763         if (principal == NULL) {
1764                 DEBUG(1, ("Could not malloc principal\n"));
1765                 return False;
1766         }
1767
1768         memcpy(principal, spnego.negTokenInit.mechListMIC.data,
1769                spnego.negTokenInit.mechListMIC.length);
1770         principal[spnego.negTokenInit.mechListMIC.length] = '\0';
1771
1772         retval = cli_krb5_get_ticket(ctx, principal, 0,
1773                                           &tkt, &session_key_krb5,
1774                                           0, NULL, NULL, NULL);
1775         if (retval) {
1776                 char *user = NULL;
1777
1778                 /* Let's try to first get the TGT, for that we need a
1779                    password. */
1780
1781                 if (opt_password == NULL) {
1782                         DEBUG(10, ("Requesting password\n"));
1783                         x_fprintf(x_stdout, "PW\n");
1784                         return True;
1785                 }
1786
1787                 user = talloc_asprintf(talloc_tos(), "%s@%s", opt_username, opt_domain);
1788                 if (!user) {
1789                         return false;
1790                 }
1791
1792                 if ((retval = kerberos_kinit_password(user, opt_password, 0, NULL))) {
1793                         DEBUG(10, ("Requesting TGT failed: %s\n", error_message(retval)));
1794                         return False;
1795                 }
1796
1797                 retval = cli_krb5_get_ticket(ctx, principal, 0,
1798                                                   &tkt, &session_key_krb5,
1799                                                   0, NULL, NULL, NULL);
1800                 if (retval) {
1801                         DEBUG(10, ("Kinit suceeded, but getting a ticket failed: %s\n", error_message(retval)));
1802                         return False;
1803                 }
1804         }
1805
1806         data_blob_free(&session_key_krb5);
1807
1808         ZERO_STRUCT(reply);
1809
1810         reply.type = SPNEGO_NEG_TOKEN_INIT;
1811         reply.negTokenInit.mechTypes = my_mechs;
1812         reply.negTokenInit.reqFlags = data_blob_null;
1813         reply.negTokenInit.reqFlagsPadding = 0;
1814         reply.negTokenInit.mechToken = tkt;
1815         reply.negTokenInit.mechListMIC = data_blob_null;
1816
1817         len = spnego_write_data(ctx, &to_server, &reply);
1818         data_blob_free(&tkt);
1819
1820         if (len == -1) {
1821                 DEBUG(1, ("Could not write SPNEGO data blob\n"));
1822                 return False;
1823         }
1824
1825         reply_base64 = base64_encode_data_blob(talloc_tos(), to_server);
1826         x_fprintf(x_stdout, "KK %s *\n", reply_base64);
1827
1828         TALLOC_FREE(reply_base64);
1829         data_blob_free(&to_server);
1830         DEBUG(10, ("sent GSS-SPNEGO KERBEROS5 negTokenInit\n"));
1831         return True;
1832 }
1833
1834 static void manage_client_krb5_targ(struct spnego_data spnego)
1835 {
1836         switch (spnego.negTokenTarg.negResult) {
1837         case SPNEGO_ACCEPT_INCOMPLETE:
1838                 DEBUG(1, ("Got a Kerberos negTokenTarg with ACCEPT_INCOMPLETE\n"));
1839                 x_fprintf(x_stdout, "BH Got a Kerberos negTokenTarg with "
1840                                     "ACCEPT_INCOMPLETE\n");
1841                 break;
1842         case SPNEGO_ACCEPT_COMPLETED:
1843                 DEBUG(10, ("Accept completed\n"));
1844                 x_fprintf(x_stdout, "AF\n");
1845                 break;
1846         case SPNEGO_REJECT:
1847                 DEBUG(10, ("Rejected\n"));
1848                 x_fprintf(x_stdout, "NA\n");
1849                 break;
1850         default:
1851                 DEBUG(1, ("Got an invalid negTokenTarg\n"));
1852                 x_fprintf(x_stdout, "AF\n");
1853         }
1854 }
1855
1856 #endif
1857
1858 static void manage_gss_spnego_client_request(struct ntlm_auth_state *state,
1859                                                 char *buf, int length)
1860 {
1861         DATA_BLOB request;
1862         struct spnego_data spnego;
1863         ssize_t len;
1864         TALLOC_CTX *ctx = talloc_tos();
1865
1866         if (!opt_username || !*opt_username) {
1867                 x_fprintf(x_stderr, "username must be specified!\n\n");
1868                 exit(1);
1869         }
1870
1871         if (strlen(buf) <= 3) {
1872                 DEBUG(1, ("SPNEGO query [%s] too short\n", buf));
1873                 x_fprintf(x_stdout, "BH SPNEGO query too short\n");
1874                 return;
1875         }
1876
1877         request = base64_decode_data_blob(buf+3);
1878
1879         if (strncmp(buf, "PW ", 3) == 0) {
1880
1881                 /* We asked for a password and obviously got it :-) */
1882
1883                 opt_password = SMB_STRNDUP((const char *)request.data, request.length);
1884
1885                 if (opt_password == NULL) {
1886                         DEBUG(1, ("Out of memory\n"));
1887                         x_fprintf(x_stdout, "BH Out of memory\n");
1888                         data_blob_free(&request);
1889                         return;
1890                 }
1891
1892                 x_fprintf(x_stdout, "OK\n");
1893                 data_blob_free(&request);
1894                 return;
1895         }
1896
1897         if ( (strncmp(buf, "TT ", 3) != 0) &&
1898              (strncmp(buf, "AF ", 3) != 0) &&
1899              (strncmp(buf, "NA ", 3) != 0) ) {
1900                 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
1901                 x_fprintf(x_stdout, "BH SPNEGO request invalid\n");
1902                 data_blob_free(&request);
1903                 return;
1904         }
1905
1906         /* So we got a server challenge to generate a SPNEGO
1907            client-to-server request... */
1908
1909         len = spnego_read_data(ctx, request, &spnego);
1910         data_blob_free(&request);
1911
1912         if (len == -1) {
1913                 DEBUG(1, ("Could not read SPNEGO data for [%s]\n", buf));
1914                 x_fprintf(x_stdout, "BH Could not read SPNEGO data\n");
1915                 return;
1916         }
1917
1918         if (spnego.type == SPNEGO_NEG_TOKEN_INIT) {
1919
1920                 /* The server offers a list of mechanisms */
1921
1922                 const char **mechType = (const char **)spnego.negTokenInit.mechTypes;
1923
1924                 while (*mechType != NULL) {
1925
1926 #ifdef HAVE_KRB5
1927                         if ( (strcmp(*mechType, OID_KERBEROS5_OLD) == 0) ||
1928                              (strcmp(*mechType, OID_KERBEROS5) == 0) ) {
1929                                 if (manage_client_krb5_init(spnego))
1930                                         goto out;
1931                         }
1932 #endif
1933
1934                         if (strcmp(*mechType, OID_NTLMSSP) == 0) {
1935                                 if (manage_client_ntlmssp_init(spnego))
1936                                         goto out;
1937                         }
1938
1939                         mechType++;
1940                 }
1941
1942                 DEBUG(1, ("Server offered no compatible mechanism\n"));
1943                 x_fprintf(x_stdout, "BH Server offered no compatible mechanism\n");
1944                 return;
1945         }
1946
1947         if (spnego.type == SPNEGO_NEG_TOKEN_TARG) {
1948
1949                 if (spnego.negTokenTarg.supportedMech == NULL) {
1950                         /* On accept/reject Windows does not send the
1951                            mechanism anymore. Handle that here and
1952                            shut down the mechanisms. */
1953
1954                         switch (spnego.negTokenTarg.negResult) {
1955                         case SPNEGO_ACCEPT_COMPLETED:
1956                                 x_fprintf(x_stdout, "AF\n");
1957                                 break;
1958                         case SPNEGO_REJECT:
1959                                 x_fprintf(x_stdout, "NA\n");
1960                                 break;
1961                         default:
1962                                 DEBUG(1, ("Got a negTokenTarg with no mech and an "
1963                                           "unknown negResult: %d\n",
1964                                           spnego.negTokenTarg.negResult));
1965                                 x_fprintf(x_stdout, "BH Got a negTokenTarg with"
1966                                                     " no mech and an unknown "
1967                                                     "negResult\n");
1968                         }
1969
1970                         TALLOC_FREE(client_ntlmssp_state);
1971                         goto out;
1972                 }
1973
1974                 if (strcmp(spnego.negTokenTarg.supportedMech,
1975                            OID_NTLMSSP) == 0) {
1976                         manage_client_ntlmssp_targ(spnego);
1977                         goto out;
1978                 }
1979
1980 #if HAVE_KRB5
1981                 if (strcmp(spnego.negTokenTarg.supportedMech,
1982                            OID_KERBEROS5_OLD) == 0) {
1983                         manage_client_krb5_targ(spnego);
1984                         goto out;
1985                 }
1986 #endif
1987
1988         }
1989
1990         DEBUG(1, ("Got an SPNEGO token I could not handle [%s]!\n", buf));
1991         x_fprintf(x_stdout, "BH Got an SPNEGO token I could not handle\n");
1992         return;
1993
1994  out:
1995         spnego_free_data(&spnego);
1996         return;
1997 }
1998
1999 static void manage_ntlm_server_1_request(struct ntlm_auth_state *state,
2000                                                 char *buf, int length)
2001 {
2002         char *request, *parameter;
2003         static DATA_BLOB challenge;
2004         static DATA_BLOB lm_response;
2005         static DATA_BLOB nt_response;
2006         static char *full_username;
2007         static char *username;
2008         static char *domain;
2009         static char *plaintext_password;
2010         static bool ntlm_server_1_user_session_key;
2011         static bool ntlm_server_1_lm_session_key;
2012
2013         if (strequal(buf, ".")) {
2014                 if (!full_username && !username) {
2015                         x_fprintf(x_stdout, "Error: No username supplied!\n");
2016                 } else if (plaintext_password) {
2017                         /* handle this request as plaintext */
2018                         if (!full_username) {
2019                                 if (asprintf(&full_username, "%s%c%s", domain, winbind_separator(), username) == -1) {
2020                                         x_fprintf(x_stdout, "Error: Out of memory in asprintf!\n.\n");
2021                                         return;
2022                                 }
2023                         }
2024                         if (check_plaintext_auth(full_username, plaintext_password, False)) {
2025                                 x_fprintf(x_stdout, "Authenticated: Yes\n");
2026                         } else {
2027                                 x_fprintf(x_stdout, "Authenticated: No\n");
2028                         }
2029                 } else if (!lm_response.data && !nt_response.data) {
2030                         x_fprintf(x_stdout, "Error: No password supplied!\n");
2031                 } else if (!challenge.data) {
2032                         x_fprintf(x_stdout, "Error: No lanman-challenge supplied!\n");
2033                 } else {
2034                         char *error_string = NULL;
2035                         uchar lm_key[8];
2036                         uchar user_session_key[16];
2037                         uint32 flags = 0;
2038
2039                         if (full_username && !username) {
2040                                 fstring fstr_user;
2041                                 fstring fstr_domain;
2042
2043                                 if (!parse_ntlm_auth_domain_user(full_username, fstr_user, fstr_domain)) {
2044                                         /* username might be 'tainted', don't print into our new-line deleimianted stream */
2045                                         x_fprintf(x_stdout, "Error: Could not parse into domain and username\n");
2046                                 }
2047                                 SAFE_FREE(username);
2048                                 SAFE_FREE(domain);
2049                                 username = smb_xstrdup(fstr_user);
2050                                 domain = smb_xstrdup(fstr_domain);
2051                         }
2052
2053                         if (!domain) {
2054                                 domain = smb_xstrdup(get_winbind_domain());
2055                         }
2056
2057                         if (ntlm_server_1_lm_session_key)
2058                                 flags |= WBFLAG_PAM_LMKEY;
2059
2060                         if (ntlm_server_1_user_session_key)
2061                                 flags |= WBFLAG_PAM_USER_SESSION_KEY;
2062
2063                         if (!NT_STATUS_IS_OK(
2064                                     contact_winbind_auth_crap(username,
2065                                                               domain,
2066                                                               global_myname(),
2067                                                               &challenge,
2068                                                               &lm_response,
2069                                                               &nt_response,
2070                                                               flags,
2071                                                               lm_key,
2072                                                               user_session_key,
2073                                                               &error_string,
2074                                                               NULL))) {
2075
2076                                 x_fprintf(x_stdout, "Authenticated: No\n");
2077                                 x_fprintf(x_stdout, "Authentication-Error: %s\n.\n", error_string);
2078                         } else {
2079                                 static char zeros[16];
2080                                 char *hex_lm_key;
2081                                 char *hex_user_session_key;
2082
2083                                 x_fprintf(x_stdout, "Authenticated: Yes\n");
2084
2085                                 if (ntlm_server_1_lm_session_key
2086                                     && (memcmp(zeros, lm_key,
2087                                                sizeof(lm_key)) != 0)) {
2088                                         hex_lm_key = hex_encode_talloc(NULL,
2089                                                                 (const unsigned char *)lm_key,
2090                                                                 sizeof(lm_key));
2091                                         x_fprintf(x_stdout, "LANMAN-Session-Key: %s\n", hex_lm_key);
2092                                         TALLOC_FREE(hex_lm_key);
2093                                 }
2094
2095                                 if (ntlm_server_1_user_session_key
2096                                     && (memcmp(zeros, user_session_key,
2097                                                sizeof(user_session_key)) != 0)) {
2098                                         hex_user_session_key = hex_encode_talloc(NULL,
2099                                                                           (const unsigned char *)user_session_key,
2100                                                                           sizeof(user_session_key));
2101                                         x_fprintf(x_stdout, "User-Session-Key: %s\n", hex_user_session_key);
2102                                         TALLOC_FREE(hex_user_session_key);
2103                                 }
2104                         }
2105                         SAFE_FREE(error_string);
2106                 }
2107                 /* clear out the state */
2108                 challenge = data_blob_null;
2109                 nt_response = data_blob_null;
2110                 lm_response = data_blob_null;
2111                 SAFE_FREE(full_username);
2112                 SAFE_FREE(username);
2113                 SAFE_FREE(domain);
2114                 SAFE_FREE(plaintext_password);
2115                 ntlm_server_1_user_session_key = False;
2116                 ntlm_server_1_lm_session_key = False;
2117                 x_fprintf(x_stdout, ".\n");
2118
2119                 return;
2120         }
2121
2122         request = buf;
2123
2124         /* Indicates a base64 encoded structure */
2125         parameter = strstr_m(request, ":: ");
2126         if (!parameter) {
2127                 parameter = strstr_m(request, ": ");
2128
2129                 if (!parameter) {
2130                         DEBUG(0, ("Parameter not found!\n"));
2131                         x_fprintf(x_stdout, "Error: Parameter not found!\n.\n");
2132                         return;
2133                 }
2134
2135                 parameter[0] ='\0';
2136                 parameter++;
2137                 parameter[0] ='\0';
2138                 parameter++;
2139
2140         } else {
2141                 parameter[0] ='\0';
2142                 parameter++;
2143                 parameter[0] ='\0';
2144                 parameter++;
2145                 parameter[0] ='\0';
2146                 parameter++;
2147
2148                 base64_decode_inplace(parameter);
2149         }
2150
2151         if (strequal(request, "LANMAN-Challenge")) {
2152                 challenge = strhex_to_data_blob(NULL, parameter);
2153                 if (challenge.length != 8) {
2154                         x_fprintf(x_stdout, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
2155                                   parameter,
2156                                   (int)challenge.length);
2157                         challenge = data_blob_null;
2158                 }
2159         } else if (strequal(request, "NT-Response")) {
2160                 nt_response = strhex_to_data_blob(NULL, parameter);
2161                 if (nt_response.length < 24) {
2162                         x_fprintf(x_stdout, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
2163                                   parameter,
2164                                   (int)nt_response.length);
2165                         nt_response = data_blob_null;
2166                 }
2167         } else if (strequal(request, "LANMAN-Response")) {
2168                 lm_response = strhex_to_data_blob(NULL, parameter);
2169                 if (lm_response.length != 24) {
2170                         x_fprintf(x_stdout, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
2171                                   parameter,
2172                                   (int)lm_response.length);
2173                         lm_response = data_blob_null;
2174                 }
2175         } else if (strequal(request, "Password")) {
2176                 plaintext_password = smb_xstrdup(parameter);
2177         } else if (strequal(request, "NT-Domain")) {
2178                 domain = smb_xstrdup(parameter);
2179         } else if (strequal(request, "Username")) {
2180                 username = smb_xstrdup(parameter);
2181         } else if (strequal(request, "Full-Username")) {
2182                 full_username = smb_xstrdup(parameter);
2183         } else if (strequal(request, "Request-User-Session-Key")) {
2184                 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
2185         } else if (strequal(request, "Request-LanMan-Session-Key")) {
2186                 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
2187         } else {
2188                 x_fprintf(x_stdout, "Error: Unknown request %s\n.\n", request);
2189         }
2190 }
2191
2192 static void manage_ntlm_change_password_1_request(struct ntlm_auth_state *state,
2193                                                         char *buf, int length)
2194 {
2195         char *request, *parameter;
2196         static DATA_BLOB new_nt_pswd;
2197         static DATA_BLOB old_nt_hash_enc;
2198         static DATA_BLOB new_lm_pswd;
2199         static DATA_BLOB old_lm_hash_enc;
2200         static char *full_username = NULL;
2201         static char *username = NULL;
2202         static char *domain = NULL;
2203         static char *newpswd =  NULL;
2204         static char *oldpswd = NULL;
2205
2206         if (strequal(buf, ".")) {
2207                 if(newpswd && oldpswd) {
2208                         uchar old_nt_hash[16];
2209                         uchar old_lm_hash[16];
2210                         uchar new_nt_hash[16];
2211                         uchar new_lm_hash[16];
2212
2213                         new_nt_pswd = data_blob(NULL, 516);
2214                         old_nt_hash_enc = data_blob(NULL, 16);
2215
2216                         /* Calculate the MD4 hash (NT compatible) of the
2217                          * password */
2218                         E_md4hash(oldpswd, old_nt_hash);
2219                         E_md4hash(newpswd, new_nt_hash);
2220
2221                         /* E_deshash returns false for 'long'
2222                            passwords (> 14 DOS chars).
2223
2224                            Therefore, don't send a buffer
2225                            encrypted with the truncated hash
2226                            (it could allow an even easier
2227                            attack on the password)
2228
2229                            Likewise, obey the admin's restriction
2230                         */
2231
2232                         if (lp_client_lanman_auth() &&
2233                             E_deshash(newpswd, new_lm_hash) &&
2234                             E_deshash(oldpswd, old_lm_hash)) {
2235                                 new_lm_pswd = data_blob(NULL, 516);
2236                                 old_lm_hash_enc = data_blob(NULL, 16);
2237                                 encode_pw_buffer(new_lm_pswd.data, newpswd,
2238                                                  STR_UNICODE);
2239
2240                                 arcfour_crypt(new_lm_pswd.data, old_nt_hash, 516);
2241                                 E_old_pw_hash(new_nt_hash, old_lm_hash,
2242                                               old_lm_hash_enc.data);
2243                         } else {
2244                                 new_lm_pswd.data = NULL;
2245                                 new_lm_pswd.length = 0;
2246                                 old_lm_hash_enc.data = NULL;
2247                                 old_lm_hash_enc.length = 0;
2248                         }
2249
2250                         encode_pw_buffer(new_nt_pswd.data, newpswd,
2251                                          STR_UNICODE);
2252
2253                         arcfour_crypt(new_nt_pswd.data, old_nt_hash, 516);
2254                         E_old_pw_hash(new_nt_hash, old_nt_hash,
2255                                       old_nt_hash_enc.data);
2256                 }
2257
2258                 if (!full_username && !username) {
2259                         x_fprintf(x_stdout, "Error: No username supplied!\n");
2260                 } else if ((!new_nt_pswd.data || !old_nt_hash_enc.data) &&
2261                            (!new_lm_pswd.data || old_lm_hash_enc.data) ) {
2262                         x_fprintf(x_stdout, "Error: No NT or LM password "
2263                                   "blobs supplied!\n");
2264                 } else {
2265                         char *error_string = NULL;
2266
2267                         if (full_username && !username) {
2268                                 fstring fstr_user;
2269                                 fstring fstr_domain;
2270
2271                                 if (!parse_ntlm_auth_domain_user(full_username,
2272                                                                  fstr_user,
2273                                                                  fstr_domain)) {
2274                                         /* username might be 'tainted', don't
2275                                          * print into our new-line
2276                                          * deleimianted stream */
2277                                         x_fprintf(x_stdout, "Error: Could not "
2278                                                   "parse into domain and "
2279                                                   "username\n");
2280                                         SAFE_FREE(username);
2281                                         username = smb_xstrdup(full_username);
2282                                 } else {
2283                                         SAFE_FREE(username);
2284                                         SAFE_FREE(domain);
2285                                         username = smb_xstrdup(fstr_user);
2286                                         domain = smb_xstrdup(fstr_domain);
2287                                 }
2288
2289                         }
2290
2291                         if(!NT_STATUS_IS_OK(contact_winbind_change_pswd_auth_crap(
2292                                                     username, domain,
2293                                                     new_nt_pswd,
2294                                                     old_nt_hash_enc,
2295                                                     new_lm_pswd,
2296                                                     old_lm_hash_enc,
2297                                                     &error_string))) {
2298                                 x_fprintf(x_stdout, "Password-Change: No\n");
2299                                 x_fprintf(x_stdout, "Password-Change-Error: "
2300                                           "%s\n.\n", error_string);
2301                         } else {
2302                                 x_fprintf(x_stdout, "Password-Change: Yes\n");
2303                         }
2304
2305                         SAFE_FREE(error_string);
2306                 }
2307                 /* clear out the state */
2308                 new_nt_pswd = data_blob_null;
2309                 old_nt_hash_enc = data_blob_null;
2310                 new_lm_pswd = data_blob_null;
2311                 old_nt_hash_enc = data_blob_null;
2312                 SAFE_FREE(full_username);
2313                 SAFE_FREE(username);
2314                 SAFE_FREE(domain);
2315                 SAFE_FREE(newpswd);
2316                 SAFE_FREE(oldpswd);
2317                 x_fprintf(x_stdout, ".\n");
2318
2319                 return;
2320         }
2321
2322         request = buf;
2323
2324         /* Indicates a base64 encoded structure */
2325         parameter = strstr_m(request, ":: ");
2326         if (!parameter) {
2327                 parameter = strstr_m(request, ": ");
2328
2329                 if (!parameter) {
2330                         DEBUG(0, ("Parameter not found!\n"));
2331                         x_fprintf(x_stdout, "Error: Parameter not found!\n.\n");
2332                         return;
2333                 }
2334
2335                 parameter[0] ='\0';
2336                 parameter++;
2337                 parameter[0] ='\0';
2338                 parameter++;
2339         } else {
2340                 parameter[0] ='\0';
2341                 parameter++;
2342                 parameter[0] ='\0';
2343                 parameter++;
2344                 parameter[0] ='\0';
2345                 parameter++;
2346
2347                 base64_decode_inplace(parameter);
2348         }
2349
2350         if (strequal(request, "new-nt-password-blob")) {
2351                 new_nt_pswd = strhex_to_data_blob(NULL, parameter);
2352                 if (new_nt_pswd.length != 516) {
2353                         x_fprintf(x_stdout, "Error: hex decode of %s failed! "
2354                                   "(got %d bytes, expected 516)\n.\n",
2355                                   parameter,
2356                                   (int)new_nt_pswd.length);
2357                         new_nt_pswd = data_blob_null;
2358                 }
2359         } else if (strequal(request, "old-nt-hash-blob")) {
2360                 old_nt_hash_enc = strhex_to_data_blob(NULL, parameter);
2361                 if (old_nt_hash_enc.length != 16) {
2362                         x_fprintf(x_stdout, "Error: hex decode of %s failed! "
2363                                   "(got %d bytes, expected 16)\n.\n",
2364                                   parameter,
2365                                   (int)old_nt_hash_enc.length);
2366                         old_nt_hash_enc = data_blob_null;
2367                 }
2368         } else if (strequal(request, "new-lm-password-blob")) {
2369                 new_lm_pswd = strhex_to_data_blob(NULL, parameter);
2370                 if (new_lm_pswd.length != 516) {
2371                         x_fprintf(x_stdout, "Error: hex decode of %s failed! "
2372                                   "(got %d bytes, expected 516)\n.\n",
2373                                   parameter,
2374                                   (int)new_lm_pswd.length);
2375                         new_lm_pswd = data_blob_null;
2376                 }
2377         }
2378         else if (strequal(request, "old-lm-hash-blob")) {
2379                 old_lm_hash_enc = strhex_to_data_blob(NULL, parameter);
2380                 if (old_lm_hash_enc.length != 16)
2381                 {
2382                         x_fprintf(x_stdout, "Error: hex decode of %s failed! "
2383                                   "(got %d bytes, expected 16)\n.\n",
2384                                   parameter,
2385                                   (int)old_lm_hash_enc.length);
2386                         old_lm_hash_enc = data_blob_null;
2387                 }
2388         } else if (strequal(request, "nt-domain")) {
2389                 domain = smb_xstrdup(parameter);
2390         } else if(strequal(request, "username")) {
2391                 username = smb_xstrdup(parameter);
2392         } else if(strequal(request, "full-username")) {
2393                 username = smb_xstrdup(parameter);
2394         } else if(strequal(request, "new-password")) {
2395                 newpswd = smb_xstrdup(parameter);
2396         } else if (strequal(request, "old-password")) {
2397                 oldpswd = smb_xstrdup(parameter);
2398         } else {
2399                 x_fprintf(x_stdout, "Error: Unknown request %s\n.\n", request);
2400         }
2401 }
2402
2403 static void manage_squid_request(struct ntlm_auth_state *state,
2404                 stdio_helper_function fn)
2405 {
2406         char *buf;
2407         char tmp[INITIAL_BUFFER_SIZE+1];
2408         int length, buf_size = 0;
2409         char *c;
2410
2411         buf = talloc_strdup(state->mem_ctx, "");
2412         if (!buf) {
2413                 DEBUG(0, ("Failed to allocate input buffer.\n"));
2414                 x_fprintf(x_stderr, "ERR\n");
2415                 exit(1);
2416         }
2417
2418         do {
2419
2420                 /* this is not a typo - x_fgets doesn't work too well under
2421                  * squid */
2422                 if (fgets(tmp, sizeof(tmp)-1, stdin) == NULL) {
2423                         if (ferror(stdin)) {
2424                                 DEBUG(1, ("fgets() failed! dying..... errno=%d "
2425                                           "(%s)\n", ferror(stdin),
2426                                           strerror(ferror(stdin))));
2427
2428                                 exit(1);
2429                         }
2430                         exit(0);
2431                 }
2432
2433                 buf = talloc_strdup_append_buffer(buf, tmp);
2434                 buf_size += INITIAL_BUFFER_SIZE;
2435
2436                 if (buf_size > MAX_BUFFER_SIZE) {
2437                         DEBUG(2, ("Oversized message\n"));
2438                         x_fprintf(x_stderr, "ERR\n");
2439                         talloc_free(buf);
2440                         return;
2441                 }
2442
2443                 c = strchr(buf, '\n');
2444         } while (c == NULL);
2445
2446         *c = '\0';
2447         length = c-buf;
2448
2449         DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
2450
2451         if (buf[0] == '\0') {
2452                 DEBUG(2, ("Invalid Request\n"));
2453                 x_fprintf(x_stderr, "ERR\n");
2454                 talloc_free(buf);
2455                 return;
2456         }
2457
2458         fn(state, buf, length);
2459         talloc_free(buf);
2460 }
2461
2462
2463 static void squid_stream(enum stdio_helper_mode stdio_mode, stdio_helper_function fn) {
2464         TALLOC_CTX *mem_ctx;
2465         struct ntlm_auth_state *state;
2466
2467         /* initialize FDescs */
2468         x_setbuf(x_stdout, NULL);
2469         x_setbuf(x_stderr, NULL);
2470
2471         mem_ctx = talloc_init("ntlm_auth");
2472         if (!mem_ctx) {
2473                 DEBUG(0, ("squid_stream: Failed to create talloc context\n"));
2474                 x_fprintf(x_stderr, "ERR\n");
2475                 exit(1);
2476         }
2477
2478         state = talloc_zero(mem_ctx, struct ntlm_auth_state);
2479         if (!state) {
2480                 DEBUG(0, ("squid_stream: Failed to talloc ntlm_auth_state\n"));
2481                 x_fprintf(x_stderr, "ERR\n");
2482                 exit(1);
2483         }
2484
2485         state->mem_ctx = mem_ctx;
2486         state->helper_mode = stdio_mode;
2487
2488         while(1) {
2489                 TALLOC_CTX *frame = talloc_stackframe();
2490                 manage_squid_request(state, fn);
2491                 TALLOC_FREE(frame);
2492         }
2493 }
2494
2495
2496 /* Authenticate a user with a challenge/response */
2497
2498 static bool check_auth_crap(void)
2499 {
2500         NTSTATUS nt_status;
2501         uint32 flags = 0;
2502         char lm_key[8];
2503         char user_session_key[16];
2504         char *hex_lm_key;
2505         char *hex_user_session_key;
2506         char *error_string;
2507         static uint8 zeros[16];
2508
2509         x_setbuf(x_stdout, NULL);
2510
2511         if (request_lm_key)
2512                 flags |= WBFLAG_PAM_LMKEY;
2513
2514         if (request_user_session_key)
2515                 flags |= WBFLAG_PAM_USER_SESSION_KEY;
2516
2517         flags |= WBFLAG_PAM_NT_STATUS_SQUASH;
2518
2519         nt_status = contact_winbind_auth_crap(opt_username, opt_domain,
2520                                               opt_workstation,
2521                                               &opt_challenge,
2522                                               &opt_lm_response,
2523                                               &opt_nt_response,
2524                                               flags,
2525                                               (unsigned char *)lm_key,
2526                                               (unsigned char *)user_session_key,
2527                                               &error_string, NULL);
2528
2529         if (!NT_STATUS_IS_OK(nt_status)) {
2530                 x_fprintf(x_stdout, "%s (0x%x)\n",
2531                           error_string,
2532                           NT_STATUS_V(nt_status));
2533                 SAFE_FREE(error_string);
2534                 return False;
2535         }
2536
2537         if (request_lm_key
2538             && (memcmp(zeros, lm_key,
2539                        sizeof(lm_key)) != 0)) {
2540                 hex_lm_key = hex_encode_talloc(talloc_tos(), (const unsigned char *)lm_key,
2541                                         sizeof(lm_key));
2542                 x_fprintf(x_stdout, "LM_KEY: %s\n", hex_lm_key);
2543                 TALLOC_FREE(hex_lm_key);
2544         }
2545         if (request_user_session_key
2546             && (memcmp(zeros, user_session_key,
2547                        sizeof(user_session_key)) != 0)) {
2548                 hex_user_session_key = hex_encode_talloc(talloc_tos(), (const unsigned char *)user_session_key,
2549                                                   sizeof(user_session_key));
2550                 x_fprintf(x_stdout, "NT_KEY: %s\n", hex_user_session_key);
2551                 TALLOC_FREE(hex_user_session_key);
2552         }
2553
2554         return True;
2555 }
2556
2557 /* Main program */
2558
2559 enum {
2560         OPT_USERNAME = 1000,
2561         OPT_DOMAIN,
2562         OPT_WORKSTATION,
2563         OPT_CHALLENGE,
2564         OPT_RESPONSE,
2565         OPT_LM,
2566         OPT_NT,
2567         OPT_PASSWORD,
2568         OPT_LM_KEY,
2569         OPT_USER_SESSION_KEY,
2570         OPT_DIAGNOSTICS,
2571         OPT_REQUIRE_MEMBERSHIP,
2572         OPT_USE_CACHED_CREDS,
2573         OPT_PAM_WINBIND_CONF
2574 };
2575
2576  int main(int argc, const char **argv)
2577 {
2578         TALLOC_CTX *frame = talloc_stackframe();
2579         int opt;
2580         static const char *helper_protocol;
2581         static int diagnostics;
2582
2583         static const char *hex_challenge;
2584         static const char *hex_lm_response;
2585         static const char *hex_nt_response;
2586
2587         poptContext pc;
2588
2589         /* NOTE: DO NOT change this interface without considering the implications!
2590            This is an external interface, which other programs will use to interact
2591            with this helper.
2592         */
2593
2594         /* We do not use single-letter command abbreviations, because they harm future
2595            interface stability. */
2596
2597         struct poptOption long_options[] = {
2598                 POPT_AUTOHELP
2599                 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
2600                 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_USERNAME, "username"},
2601                 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
2602                 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
2603                 { "challenge", 0, POPT_ARG_STRING, &hex_challenge, OPT_CHALLENGE, "challenge (HEX encoded)"},
2604                 { "lm-response", 0, POPT_ARG_STRING, &hex_lm_response, OPT_LM, "LM Response to the challenge (HEX encoded)"},
2605                 { "nt-response", 0, POPT_ARG_STRING, &hex_nt_response, OPT_NT, "NT or NTLMv2 Response to the challenge (HEX encoded)"},
2606                 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
2607                 { "request-lm-key", 0, POPT_ARG_NONE, &request_lm_key, OPT_LM_KEY, "Retrieve LM session key"},
2608                 { "request-nt-key", 0, POPT_ARG_NONE, &request_user_session_key, OPT_USER_SESSION_KEY, "Retrieve User (NT) session key"},
2609                 { "use-cached-creds", 0, POPT_ARG_NONE, &use_cached_creds, OPT_USE_CACHED_CREDS, "Use cached credentials if no password is given"},
2610                 { "diagnostics", 0, POPT_ARG_NONE, &diagnostics,
2611                   OPT_DIAGNOSTICS,
2612                   "Perform diagnostics on the authentication chain"},
2613                 { "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" },
2614                 { "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" },
2615                 POPT_COMMON_CONFIGFILE
2616                 POPT_COMMON_VERSION
2617                 POPT_TABLEEND
2618         };
2619
2620         /* Samba client initialisation */
2621         load_case_tables();
2622
2623         setup_logging("ntlm_auth", DEBUG_STDERR);
2624
2625         /* Parse options */
2626
2627         pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
2628
2629         /* Parse command line options */
2630
2631         if (argc == 1) {
2632                 poptPrintHelp(pc, stderr, 0);
2633                 return 1;
2634         }
2635
2636         while((opt = poptGetNextOpt(pc)) != -1) {
2637                 /* Get generic config options like --configfile */
2638         }
2639
2640         poptFreeContext(pc);
2641
2642         if (!lp_load(get_dyn_CONFIGFILE(), True, False, False, True)) {
2643                 d_fprintf(stderr, "ntlm_auth: error opening config file %s. Error was %s\n",
2644                         get_dyn_CONFIGFILE(), strerror(errno));
2645                 exit(1);
2646         }
2647
2648         pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
2649                             POPT_CONTEXT_KEEP_FIRST);
2650
2651         while((opt = poptGetNextOpt(pc)) != -1) {
2652                 switch (opt) {
2653                 case OPT_CHALLENGE:
2654                         opt_challenge = strhex_to_data_blob(NULL, hex_challenge);
2655                         if (opt_challenge.length != 8) {
2656                                 x_fprintf(x_stderr, "hex decode of %s failed! (only got %d bytes)\n",
2657                                           hex_challenge,
2658                                           (int)opt_challenge.length);
2659                                 exit(1);
2660                         }
2661                         break;
2662                 case OPT_LM:
2663                         opt_lm_response = strhex_to_data_blob(NULL, hex_lm_response);
2664                         if (opt_lm_response.length != 24) {
2665                                 x_fprintf(x_stderr, "hex decode of %s failed! (only got %d bytes)\n",
2666                                           hex_lm_response,
2667                                           (int)opt_lm_response.length);
2668                                 exit(1);
2669                         }
2670                         break;
2671
2672                 case OPT_NT:
2673                         opt_nt_response = strhex_to_data_blob(NULL, hex_nt_response);
2674                         if (opt_nt_response.length < 24) {
2675                                 x_fprintf(x_stderr, "hex decode of %s failed! (only got %d bytes)\n",
2676                                           hex_nt_response,
2677                                           (int)opt_nt_response.length);
2678                                 exit(1);
2679                         }
2680                         break;
2681
2682                 case OPT_REQUIRE_MEMBERSHIP:
2683                         if (StrnCaseCmp("S-", require_membership_of, 2) == 0) {
2684                                 require_membership_of_sid = require_membership_of;
2685                         }
2686                         break;
2687                 }
2688         }
2689
2690         if (opt_username) {
2691                 char *domain = SMB_STRDUP(opt_username);
2692                 char *p = strchr_m(domain, *lp_winbind_separator());
2693                 if (p) {
2694                         opt_username = p+1;
2695                         *p = '\0';
2696                         if (opt_domain && !strequal(opt_domain, domain)) {
2697                                 x_fprintf(x_stderr, "Domain specified in username (%s) "
2698                                         "doesn't match specified domain (%s)!\n\n",
2699                                         domain, opt_domain);
2700                                 poptPrintHelp(pc, stderr, 0);
2701                                 exit(1);
2702                         }
2703                         opt_domain = domain;
2704                 } else {
2705                         SAFE_FREE(domain);
2706                 }
2707         }
2708
2709         /* Note: if opt_domain is "" then send no domain */
2710         if (opt_domain == NULL) {
2711                 opt_domain = get_winbind_domain();
2712         }
2713
2714         if (opt_workstation == NULL) {
2715                 opt_workstation = "";
2716         }
2717
2718         if (helper_protocol) {
2719                 int i;
2720                 for (i=0; i<NUM_HELPER_MODES; i++) {
2721                         if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
2722                                 squid_stream(stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
2723                                 exit(0);
2724                         }
2725                 }
2726                 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
2727
2728                 for (i=0; i<NUM_HELPER_MODES; i++) {
2729                         x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
2730                 }
2731
2732                 exit(1);
2733         }
2734
2735         if (!opt_username || !*opt_username) {
2736                 x_fprintf(x_stderr, "username must be specified!\n\n");
2737                 poptPrintHelp(pc, stderr, 0);
2738                 exit(1);
2739         }
2740
2741         if (opt_challenge.length) {
2742                 if (!check_auth_crap()) {
2743                         exit(1);
2744                 }
2745                 exit(0);
2746         }
2747
2748         if (!opt_password) {
2749                 opt_password = getpass("password: ");
2750         }
2751
2752         if (diagnostics) {
2753                 if (!diagnose_ntlm_auth()) {
2754                         return 1;
2755                 }
2756         } else {
2757                 fstring user;
2758
2759                 fstr_sprintf(user, "%s%c%s", opt_domain, winbind_separator(), opt_username);
2760                 if (!check_plaintext_auth(user, opt_password, True)) {
2761                         return 1;
2762                 }
2763         }
2764
2765         /* Exit code */
2766
2767         poptFreeContext(pc);
2768         TALLOC_FREE(frame);
2769         return 0;
2770 }