source4/auth/gensec/gensec_krb5.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Kerberos backend for GENSEC
   5
   6    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004
   7    Copyright (C) Andrew Tridgell 2001
   8    Copyright (C) Luke Howard 2002-2003
   9    Copyright (C) Stefan Metzmacher 2004-2005
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  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 <tevent.h>
  28 #include "lib/util/tevent_ntstatus.h"
  29 #include "system/kerberos.h"
  30 #include "auth/kerberos/kerberos.h"
  31 #include "auth/auth.h"
  32 #include "lib/tsocket/tsocket.h"
  33 #include "librpc/gen_ndr/dcerpc.h"
  34 #include "auth/credentials/credentials.h"
  35 #include "auth/credentials/credentials_krb5.h"
  36 #include "auth/kerberos/kerberos_credentials.h"
  37 #include "auth/gensec/gensec.h"
  38 #include "auth/gensec/gensec_internal.h"
  39 #include "auth/gensec/gensec_proto.h"
  40 #include "auth/gensec/gensec_toplevel_proto.h"
  41 #include "param/param.h"
  42 #include "auth/auth_sam_reply.h"
  43 #include "lib/util/util_net.h"
  44 #include "../lib/util/asn1.h"
  45 #include "auth/kerberos/pac_utils.h"
  46 #include "gensec_krb5.h"
  47
  48 _PUBLIC_ NTSTATUS gensec_krb5_init(TALLOC_CTX *);
  49
  50 enum GENSEC_KRB5_STATE {
  51         GENSEC_KRB5_SERVER_START,
  52         GENSEC_KRB5_CLIENT_START,
  53         GENSEC_KRB5_CLIENT_MUTUAL_AUTH,
  54         GENSEC_KRB5_DONE
  55 };
  56
  57 struct gensec_krb5_state {
  58         enum GENSEC_KRB5_STATE state_position;
  59         struct smb_krb5_context *smb_krb5_context;
  60         krb5_auth_context auth_context;
  61         krb5_data enc_ticket;
  62         krb5_keyblock *keyblock;
  63         krb5_ticket *ticket;
  64         bool gssapi;
  65         krb5_flags ap_req_options;
  66 };
  67
  68 static int gensec_krb5_destroy(struct gensec_krb5_state *gensec_krb5_state)
  69 {
  70         if (!gensec_krb5_state->smb_krb5_context) {
  71                 /* We can't clean anything else up unless we started up this far */
  72                 return 0;
  73         }
  74         if (gensec_krb5_state->enc_ticket.length) {
  75                 smb_krb5_free_data_contents(gensec_krb5_state->smb_krb5_context->krb5_context,
  76                                             &gensec_krb5_state->enc_ticket);
  77         }
  78
  79         if (gensec_krb5_state->ticket) {
  80                 krb5_free_ticket(gensec_krb5_state->smb_krb5_context->krb5_context,
  81                                  gensec_krb5_state->ticket);
  82         }
  83
  84         /* ccache freed in a child destructor */
  85
  86         krb5_free_keyblock(gensec_krb5_state->smb_krb5_context->krb5_context,
  87                            gensec_krb5_state->keyblock);
  88
  89         if (gensec_krb5_state->auth_context) {
  90                 krb5_auth_con_free(gensec_krb5_state->smb_krb5_context->krb5_context,
  91                                    gensec_krb5_state->auth_context);
  92         }
  93
  94         return 0;
  95 }
  96
  97 static NTSTATUS gensec_krb5_start(struct gensec_security *gensec_security, bool gssapi)
  98 {
  99         krb5_error_code ret;
 100         struct gensec_krb5_state *gensec_krb5_state;
 101         struct cli_credentials *creds;
 102         const struct tsocket_address *tlocal_addr, *tremote_addr;
 103         krb5_address my_krb5_addr, peer_krb5_addr;
 104
 105         creds = gensec_get_credentials(gensec_security);
 106         if (!creds) {
 107                 return NT_STATUS_INVALID_PARAMETER;
 108         }
 109
 110         gensec_krb5_state = talloc_zero(gensec_security, struct gensec_krb5_state);
 111         if (!gensec_krb5_state) {
 112                 return NT_STATUS_NO_MEMORY;
 113         }
 114
 115         gensec_security->private_data = gensec_krb5_state;
 116         gensec_krb5_state->gssapi = gssapi;
 117
 118         talloc_set_destructor(gensec_krb5_state, gensec_krb5_destroy);
 119
 120         if (cli_credentials_get_krb5_context(creds,
 121                                              gensec_security->settings->lp_ctx, &gensec_krb5_state->smb_krb5_context)) {
 122                 talloc_free(gensec_krb5_state);
 123                 return NT_STATUS_INTERNAL_ERROR;
 124         }
 125
 126         ret = krb5_auth_con_init(gensec_krb5_state->smb_krb5_context->krb5_context, &gensec_krb5_state->auth_context);
 127         if (ret) {
 128                 DEBUG(1,("gensec_krb5_start: krb5_auth_con_init failed (%s)\n",
 129                          smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
 130                                                     ret, gensec_krb5_state)));
 131                 talloc_free(gensec_krb5_state);
 132                 return NT_STATUS_INTERNAL_ERROR;
 133         }
 134
 135         ret = krb5_auth_con_setflags(gensec_krb5_state->smb_krb5_context->krb5_context,
 136                                      gensec_krb5_state->auth_context,
 137                                      KRB5_AUTH_CONTEXT_DO_SEQUENCE);
 138         if (ret) {
 139                 DEBUG(1,("gensec_krb5_start: krb5_auth_con_setflags failed (%s)\n",
 140                          smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
 141                                                     ret, gensec_krb5_state)));
 142                 talloc_free(gensec_krb5_state);
 143                 return NT_STATUS_INTERNAL_ERROR;
 144         }
 145
 146         tlocal_addr = gensec_get_local_address(gensec_security);
 147         if (tlocal_addr) {
 148                 struct samba_sockaddr addr;
 149                 bool ok;
 150
 151                 addr.sa_socklen = tsocket_address_bsd_sockaddr(tlocal_addr,
 152                                                                &addr.u.sa,
 153                                                                sizeof(addr.u));
 154                 if (addr.sa_socklen < 0) {
 155                         talloc_free(gensec_krb5_state);
 156                         return NT_STATUS_INTERNAL_ERROR;
 157                 }
 158                 ok = smb_krb5_sockaddr_to_kaddr(&addr.u.ss, &my_krb5_addr);
 159                 if (!ok) {
 160                         DBG_WARNING("smb_krb5_sockaddr_to_kaddr (local) failed\n");
 161                         talloc_free(gensec_krb5_state);
 162                         return NT_STATUS_INTERNAL_ERROR;
 163                 }
 164         }
 165
 166         tremote_addr = gensec_get_remote_address(gensec_security);
 167         if (tremote_addr) {
 168                 struct samba_sockaddr addr;
 169                 bool ok;
 170
 171                 addr.sa_socklen = tsocket_address_bsd_sockaddr(tremote_addr,
 172                                                                &addr.u.sa,
 173                                                                sizeof(addr.u));
 174                 if (addr.sa_socklen < 0) {
 175                         talloc_free(gensec_krb5_state);
 176                         return NT_STATUS_INTERNAL_ERROR;
 177                 }
 178                 ok = smb_krb5_sockaddr_to_kaddr(&addr.u.ss, &peer_krb5_addr);
 179                 if (!ok) {
 180                         DBG_WARNING("smb_krb5_sockaddr_to_kaddr (remote) failed\n");
 181                         talloc_free(gensec_krb5_state);
 182                         return NT_STATUS_INTERNAL_ERROR;
 183                 }
 184         }
 185
 186         ret = krb5_auth_con_setaddrs(gensec_krb5_state->smb_krb5_context->krb5_context,
 187                                      gensec_krb5_state->auth_context,
 188                                      tlocal_addr ? &my_krb5_addr : NULL,
 189                                      tremote_addr ? &peer_krb5_addr : NULL);
 190         if (ret) {
 191                 DEBUG(1,("gensec_krb5_start: krb5_auth_con_setaddrs failed (%s)\n",
 192                          smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
 193                                                     ret, gensec_krb5_state)));
 194                 talloc_free(gensec_krb5_state);
 195                 return NT_STATUS_INTERNAL_ERROR;
 196         }
 197
 198         return NT_STATUS_OK;
 199 }
 200
 201 static NTSTATUS gensec_krb5_common_server_start(struct gensec_security *gensec_security, bool gssapi)
 202 {
 203         NTSTATUS nt_status;
 204         struct gensec_krb5_state *gensec_krb5_state;
 205
 206         nt_status = gensec_krb5_start(gensec_security, gssapi);
 207         if (!NT_STATUS_IS_OK(nt_status)) {
 208                 return nt_status;
 209         }
 210
 211         gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
 212         gensec_krb5_state->state_position = GENSEC_KRB5_SERVER_START;
 213
 214         return NT_STATUS_OK;
 215 }
 216
 217 static NTSTATUS gensec_krb5_server_start(struct gensec_security *gensec_security)
 218 {
 219         return gensec_krb5_common_server_start(gensec_security, false);
 220 }
 221
 222 static NTSTATUS gensec_fake_gssapi_krb5_server_start(struct gensec_security *gensec_security)
 223 {
 224         return gensec_krb5_common_server_start(gensec_security, true);
 225 }
 226
 227 static NTSTATUS gensec_krb5_common_client_start(struct gensec_security *gensec_security, bool gssapi)
 228 {
 229         const char *hostname;
 230         struct gensec_krb5_state *gensec_krb5_state;
 231         NTSTATUS nt_status;
 232         hostname = gensec_get_target_hostname(gensec_security);
 233         if (!hostname) {
 234                 DEBUG(3, ("No hostname for target computer passed in, cannot use kerberos for this connection\n"));
 235                 return NT_STATUS_INVALID_PARAMETER;
 236         }
 237         if (is_ipaddress(hostname)) {
 238                 DEBUG(2, ("Cannot do krb5 to an IP address"));
 239                 return NT_STATUS_INVALID_PARAMETER;
 240         }
 241         if (strcmp(hostname, "localhost") == 0) {
 242                 DEBUG(2, ("krb5 to 'localhost' does not make sense"));
 243                 return NT_STATUS_INVALID_PARAMETER;
 244         }
 245
 246         nt_status = gensec_krb5_start(gensec_security, gssapi);
 247         if (!NT_STATUS_IS_OK(nt_status)) {
 248                 return nt_status;
 249         }
 250
 251         gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
 252         gensec_krb5_state->state_position = GENSEC_KRB5_CLIENT_START;
 253         gensec_krb5_state->ap_req_options = AP_OPTS_USE_SUBKEY;
 254
 255         if (gensec_krb5_state->gssapi) {
 256                 /* The Fake GSSAPI model emulates Samba3, which does not do mutual authentication */
 257                 if (gensec_setting_bool(gensec_security->settings, "gensec_fake_gssapi_krb5", "mutual", false)) {
 258                         gensec_krb5_state->ap_req_options |= AP_OPTS_MUTUAL_REQUIRED;
 259                 }
 260         } else {
 261                 /* The wrapping for KPASSWD (a user of the raw KRB5 API) should be mutually authenticated */
 262                 if (gensec_setting_bool(gensec_security->settings, "gensec_krb5", "mutual", true)) {
 263                         gensec_krb5_state->ap_req_options |= AP_OPTS_MUTUAL_REQUIRED;
 264                 }
 265         }
 266         return NT_STATUS_OK;
 267 }
 268
 269 static NTSTATUS gensec_krb5_common_client_creds(struct gensec_security *gensec_security,
 270                                                 struct tevent_context *ev,
 271                                                 bool gssapi)
 272 {
 273         struct gensec_krb5_state *gensec_krb5_state;
 274         krb5_error_code ret;
 275         struct ccache_container *ccache_container;
 276         const char *error_string;
 277         const char *principal;
 278         const char *hostname;
 279         krb5_data in_data = { .length = 0 };
 280         krb5_data *in_data_p = NULL;
 281 #ifdef SAMBA4_USES_HEIMDAL
 282         struct tevent_context *previous_ev;
 283 #endif
 284
 285         if (lpcfg_parm_bool(gensec_security->settings->lp_ctx,
 286                             NULL, "gensec_krb5", "send_authenticator_checksum", true)) {
 287                 in_data_p = &in_data;
 288         }
 289
 290         gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
 291
 292         principal = gensec_get_target_principal(gensec_security);
 293         hostname = gensec_get_target_hostname(gensec_security);
 294
 295         ret = cli_credentials_get_ccache(gensec_get_credentials(gensec_security),
 296                                          ev,
 297                                          gensec_security->settings->lp_ctx, &ccache_container, &error_string);
 298         switch (ret) {
 299         case 0:
 300                 break;
 301         case KRB5KDC_ERR_PREAUTH_FAILED:
 302         case KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN:
 303                 return NT_STATUS_LOGON_FAILURE;
 304         case KRB5_KDC_UNREACH:
 305                 DEBUG(3, ("Cannot reach a KDC we require to contact %s: %s\n", principal, error_string));
 306                 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
 307         case KRB5_CC_NOTFOUND:
 308         case KRB5_CC_END:
 309                 DEBUG(3, ("Error preparing credentials we require to contact %s : %s\n", principal, error_string));
 310                 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
 311         default:
 312                 DEBUG(1, ("gensec_krb5_start: Aquiring initiator credentials failed: %s\n", error_string));
 313                 return NT_STATUS_UNSUCCESSFUL;
 314         }
 315
 316 #ifdef SAMBA4_USES_HEIMDAL
 317         /* Do this every time, in case we have weird recursive issues here */
 318         ret = smb_krb5_context_set_event_ctx(gensec_krb5_state->smb_krb5_context, ev, &previous_ev);
 319         if (ret != 0) {
 320                 DEBUG(1, ("gensec_krb5_start: Setting event context failed\n"));
 321                 return NT_STATUS_NO_MEMORY;
 322         }
 323 #endif
 324         if (principal) {
 325                 krb5_principal target_principal;
 326                 ret = krb5_parse_name(gensec_krb5_state->smb_krb5_context->krb5_context, principal,
 327                                       &target_principal);
 328                 if (ret == 0) {
 329                         krb5_creds this_cred;
 330                         krb5_creds *cred;
 331
 332                         ZERO_STRUCT(this_cred);
 333                         ret = krb5_cc_get_principal(gensec_krb5_state->smb_krb5_context->krb5_context,
 334                                                     ccache_container->ccache,
 335                                                     &this_cred.client);
 336                         if (ret != 0) {
 337                                 krb5_free_principal(gensec_krb5_state->smb_krb5_context->krb5_context,
 338                                                     target_principal);
 339                                 return NT_STATUS_UNSUCCESSFUL;
 340                         }
 341
 342                         ret = krb5_copy_principal(gensec_krb5_state->smb_krb5_context->krb5_context,
 343                                                   target_principal,
 344                                                   &this_cred.server);
 345                         krb5_free_principal(gensec_krb5_state->smb_krb5_context->krb5_context,
 346                                             target_principal);
 347                         if (ret != 0) {
 348                                 krb5_free_cred_contents(gensec_krb5_state->smb_krb5_context->krb5_context,
 349                                                         &this_cred);
 350                                 return NT_STATUS_UNSUCCESSFUL;
 351                         }
 352                         this_cred.times.endtime = 0;
 353
 354                         ret = krb5_get_credentials(gensec_krb5_state->smb_krb5_context->krb5_context,
 355                                                    0,
 356                                                    ccache_container->ccache,
 357                                                    &this_cred,
 358                                                    &cred);
 359                         krb5_free_cred_contents(gensec_krb5_state->smb_krb5_context->krb5_context,
 360                                                 &this_cred);
 361                         if (ret != 0) {
 362                                 return NT_STATUS_UNSUCCESSFUL;
 363                         }
 364
 365                         ret = krb5_mk_req_extended(gensec_krb5_state->smb_krb5_context->krb5_context,
 366                                                    &gensec_krb5_state->auth_context,
 367                                                    gensec_krb5_state->ap_req_options,
 368                                                    in_data_p,
 369                                                    cred,
 370                                                    &gensec_krb5_state->enc_ticket);
 371                 }
 372         } else {
 373                 ret = krb5_mk_req(gensec_krb5_state->smb_krb5_context->krb5_context,
 374                                   &gensec_krb5_state->auth_context,
 375                                   gensec_krb5_state->ap_req_options,
 376                                   discard_const_p(char, gensec_get_target_service(gensec_security)),
 377                                   discard_const_p(char, hostname),
 378                                   in_data_p, ccache_container->ccache,
 379                                   &gensec_krb5_state->enc_ticket);
 380         }
 381
 382 #ifdef SAMBA4_USES_HEIMDAL
 383         smb_krb5_context_remove_event_ctx(gensec_krb5_state->smb_krb5_context, previous_ev, ev);
 384 #endif
 385
 386         switch (ret) {
 387         case 0:
 388                 return NT_STATUS_OK;
 389         case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN:
 390                 DEBUG(3, ("Server [%s] is not registered with our KDC: %s\n",
 391                           hostname, smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
 392                 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
 393         case KRB5_KDC_UNREACH:
 394                 DEBUG(3, ("Cannot reach a KDC we require to contact host [%s]: %s\n",
 395                           hostname, smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
 396                 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
 397         case KRB5KDC_ERR_PREAUTH_FAILED:
 398         case KRB5KRB_AP_ERR_TKT_EXPIRED:
 399         case KRB5_CC_END:
 400                 /* Too much clock skew - we will need to kinit to re-skew the clock */
 401         case KRB5KRB_AP_ERR_SKEW:
 402         case KRB5_KDCREP_SKEW:
 403                 DEBUG(3, ("kerberos (mk_req) failed: %s\n",
 404                           smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
 405                 FALL_THROUGH;
 406         /* just don't print a message for these really ordinary messages */
 407         case KRB5_FCC_NOFILE:
 408         case KRB5_CC_NOTFOUND:
 409         case ENOENT:
 410
 411                 return NT_STATUS_UNSUCCESSFUL;
 412                 break;
 413
 414         default:
 415                 DEBUG(0, ("kerberos: %s\n",
 416                           smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
 417                 return NT_STATUS_UNSUCCESSFUL;
 418         }
 419 }
 420
 421 static NTSTATUS gensec_krb5_client_start(struct gensec_security *gensec_security)
 422 {
 423         return gensec_krb5_common_client_start(gensec_security, false);
 424 }
 425
 426 static NTSTATUS gensec_fake_gssapi_krb5_client_start(struct gensec_security *gensec_security)
 427 {
 428         return gensec_krb5_common_client_start(gensec_security, true);
 429 }
 430
 431
 432 /*
 433   generate a krb5 GSS-API wrapper packet given a ticket
 434 */
 435 static DATA_BLOB gensec_gssapi_gen_krb5_wrap(TALLOC_CTX *mem_ctx, const DATA_BLOB *ticket, const uint8_t tok_id[2])
 436 {
 437         struct asn1_data *data;
 438         DATA_BLOB ret = data_blob_null;
 439
 440         data = asn1_init(mem_ctx);
 441         if (!data || !ticket->data) {
 442                 return ret;
 443         }
 444
 445         if (!asn1_push_tag(data, ASN1_APPLICATION(0))) goto err;
 446         if (!asn1_write_OID(data, GENSEC_OID_KERBEROS5)) goto err;
 447
 448         if (!asn1_write(data, tok_id, 2)) goto err;
 449         if (!asn1_write(data, ticket->data, ticket->length)) goto err;
 450         if (!asn1_pop_tag(data)) goto err;
 451
 452
 453         if (!asn1_extract_blob(data, mem_ctx, &ret)) {
 454                 goto err;
 455         }
 456         asn1_free(data);
 457
 458         return ret;
 459
 460   err:
 461
 462         DEBUG(1, ("Failed to build krb5 wrapper at offset %d\n",
 463                   (int)asn1_current_ofs(data)));
 464         asn1_free(data);
 465         return ret;
 466 }
 467
 468 /*
 469   parse a krb5 GSS-API wrapper packet giving a ticket
 470 */
 471 static bool gensec_gssapi_parse_krb5_wrap(TALLOC_CTX *mem_ctx, const DATA_BLOB *blob, DATA_BLOB *ticket, uint8_t tok_id[2])
 472 {
 473         bool ret = false;
 474         struct asn1_data *data = asn1_init(mem_ctx);
 475         int data_remaining;
 476
 477         if (!data) {
 478                 return false;
 479         }
 480
 481         if (!asn1_load(data, *blob)) goto err;
 482         if (!asn1_start_tag(data, ASN1_APPLICATION(0))) goto err;
 483         if (!asn1_check_OID(data, GENSEC_OID_KERBEROS5)) goto err;
 484
 485         data_remaining = asn1_tag_remaining(data);
 486
 487         if (data_remaining < 3) {
 488                 asn1_set_error(data);
 489         } else {
 490                 if (!asn1_read(data, tok_id, 2)) goto err;
 491                 data_remaining -= 2;
 492                 *ticket = data_blob_talloc(mem_ctx, NULL, data_remaining);
 493                 if (!asn1_read(data, ticket->data, ticket->length)) goto err;
 494         }
 495
 496         if (!asn1_end_tag(data)) goto err;
 497
 498         ret = !asn1_has_error(data);
 499
 500   err:
 501
 502         asn1_free(data);
 503
 504         return ret;
 505 }
 506
 507 static NTSTATUS gensec_krb5_update_internal(struct gensec_security *gensec_security,
 508                                             TALLOC_CTX *out_mem_ctx,
 509                                             struct tevent_context *ev,
 510                                             const DATA_BLOB in, DATA_BLOB *out)
 511 {
 512         struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
 513         krb5_error_code ret = 0;
 514         NTSTATUS nt_status;
 515
 516         switch (gensec_krb5_state->state_position) {
 517         case GENSEC_KRB5_CLIENT_START:
 518         {
 519                 DATA_BLOB unwrapped_out;
 520
 521                 nt_status = gensec_krb5_common_client_creds(gensec_security, ev, gensec_krb5_state->gssapi);
 522                 if (!NT_STATUS_IS_OK(nt_status)) {
 523                         return nt_status;
 524                 }
 525
 526                 if (gensec_krb5_state->gssapi) {
 527                         unwrapped_out = data_blob_talloc(out_mem_ctx, gensec_krb5_state->enc_ticket.data, gensec_krb5_state->enc_ticket.length);
 528
 529                         /* wrap that up in a nice GSS-API wrapping */
 530                         *out = gensec_gssapi_gen_krb5_wrap(out_mem_ctx, &unwrapped_out, TOK_ID_KRB_AP_REQ);
 531                 } else {
 532                         *out = data_blob_talloc(out_mem_ctx, gensec_krb5_state->enc_ticket.data, gensec_krb5_state->enc_ticket.length);
 533                 }
 534                 if (gensec_krb5_state->ap_req_options & AP_OPTS_MUTUAL_REQUIRED) {
 535                         gensec_krb5_state->state_position = GENSEC_KRB5_CLIENT_MUTUAL_AUTH;
 536                         nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
 537                 } else {
 538                         gensec_krb5_state->state_position = GENSEC_KRB5_DONE;
 539                         nt_status = NT_STATUS_OK;
 540                 }
 541                 return nt_status;
 542         }
 543
 544         case GENSEC_KRB5_CLIENT_MUTUAL_AUTH:
 545         {
 546                 DATA_BLOB unwrapped_in;
 547                 krb5_data inbuf;
 548                 krb5_ap_rep_enc_part *repl = NULL;
 549                 uint8_t tok_id[2];
 550
 551                 if (gensec_krb5_state->gssapi) {
 552                         if (!gensec_gssapi_parse_krb5_wrap(out_mem_ctx, &in, &unwrapped_in, tok_id)) {
 553                                 DEBUG(1,("gensec_gssapi_parse_krb5_wrap(mutual authentication) failed to parse\n"));
 554                                 dump_data_pw("Mutual authentication message:\n", in.data, in.length);
 555                                 return NT_STATUS_INVALID_PARAMETER;
 556                         }
 557                 } else {
 558                         unwrapped_in = in;
 559                 }
 560                 /* TODO: check the tok_id */
 561
 562                 inbuf.data = (char *)unwrapped_in.data;
 563                 inbuf.length = unwrapped_in.length;
 564                 ret = krb5_rd_rep(gensec_krb5_state->smb_krb5_context->krb5_context,
 565                                   gensec_krb5_state->auth_context,
 566                                   &inbuf, &repl);
 567                 if (ret) {
 568                         DEBUG(1,("krb5_rd_rep (mutual authentication) failed (%s)\n",
 569                                  smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, out_mem_ctx)));
 570                         dump_data_pw("Mutual authentication message:\n", (uint8_t *)inbuf.data, inbuf.length);
 571                         nt_status = NT_STATUS_ACCESS_DENIED;
 572                 } else {
 573                         *out = data_blob(NULL, 0);
 574                         nt_status = NT_STATUS_OK;
 575                         gensec_krb5_state->state_position = GENSEC_KRB5_DONE;
 576                 }
 577                 if (repl) {
 578                         krb5_free_ap_rep_enc_part(gensec_krb5_state->smb_krb5_context->krb5_context, repl);
 579                 }
 580                 return nt_status;
 581         }
 582
 583         case GENSEC_KRB5_SERVER_START:
 584         {
 585                 DATA_BLOB unwrapped_in;
 586                 DATA_BLOB unwrapped_out = data_blob(NULL, 0);
 587                 krb5_data inbuf, outbuf;
 588                 uint8_t tok_id[2];
 589                 struct keytab_container *keytab;
 590                 krb5_principal server_in_keytab;
 591                 const char *error_string;
 592                 enum credentials_obtained obtained;
 593
 594                 if (!in.data) {
 595                         return NT_STATUS_INVALID_PARAMETER;
 596                 }
 597
 598                 /* Grab the keytab, however generated */
 599                 ret = cli_credentials_get_keytab(gensec_get_credentials(gensec_security),
 600                                                  gensec_security->settings->lp_ctx, &keytab);
 601                 if (ret) {
 602                         return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 603                 }
 604
 605                 /* This ensures we lookup the correct entry in that
 606                  * keytab.  A NULL principal is acceptable, and means
 607                  * that the krb5 libs should search the keytab at
 608                  * accept time for any matching key */
 609                 ret = principal_from_credentials(out_mem_ctx, gensec_get_credentials(gensec_security),
 610                                                  gensec_krb5_state->smb_krb5_context,
 611                                                  &server_in_keytab, &obtained, &error_string);
 612
 613                 if (ret) {
 614                         DEBUG(2,("Failed to make credentials from principal: %s\n", error_string));
 615                         return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 616                 }
 617
 618                 if (keytab->password_based || obtained < CRED_SPECIFIED) {
 619                         /*
 620                          * Use match-by-key in this case (matches
 621                          * cli_credentials_get_server_gss_creds()
 622                          * behaviour).  No need to free the memory,
 623                          * this is handled with a talloc destructor.
 624                          */
 625                         server_in_keytab = NULL;
 626                 }
 627
 628                 /* Parse the GSSAPI wrapping, if it's there... (win2k3 allows it to be omited) */
 629                 if (gensec_krb5_state->gssapi
 630                     && gensec_gssapi_parse_krb5_wrap(out_mem_ctx, &in, &unwrapped_in, tok_id)) {
 631                         inbuf.data = (char *)unwrapped_in.data;
 632                         inbuf.length = unwrapped_in.length;
 633                 } else {
 634                         inbuf.data = (char *)in.data;
 635                         inbuf.length = in.length;
 636                 }
 637
 638                 ret = smb_krb5_rd_req_decoded(gensec_krb5_state->smb_krb5_context->krb5_context,
 639                                               &gensec_krb5_state->auth_context,
 640                                               &inbuf,
 641                                               keytab->keytab,
 642                                               server_in_keytab,
 643                                               &outbuf,
 644                                               &gensec_krb5_state->ticket,
 645                                               &gensec_krb5_state->keyblock);
 646
 647                 if (ret) {
 648                         DBG_WARNING("smb_krb5_rd_req_decoded failed\n");
 649                         return NT_STATUS_LOGON_FAILURE;
 650                 }
 651                 unwrapped_out.data = (uint8_t *)outbuf.data;
 652                 unwrapped_out.length = outbuf.length;
 653                 gensec_krb5_state->state_position = GENSEC_KRB5_DONE;
 654                 /* wrap that up in a nice GSS-API wrapping */
 655                 if (gensec_krb5_state->gssapi) {
 656                         *out = gensec_gssapi_gen_krb5_wrap(out_mem_ctx, &unwrapped_out, TOK_ID_KRB_AP_REP);
 657                 } else {
 658                         *out = data_blob_talloc(out_mem_ctx, outbuf.data, outbuf.length);
 659                 }
 660                 smb_krb5_free_data_contents(gensec_krb5_state->smb_krb5_context->krb5_context,
 661                                             &outbuf);
 662                 return NT_STATUS_OK;
 663         }
 664
 665         case GENSEC_KRB5_DONE:
 666         default:
 667                 /* Asking too many times... */
 668                 return NT_STATUS_INVALID_PARAMETER;
 669         }
 670 }
 671
 672 struct gensec_krb5_update_state {
 673         NTSTATUS status;
 674         DATA_BLOB out;
 675 };
 676
 677 static struct tevent_req *gensec_krb5_update_send(TALLOC_CTX *mem_ctx,
 678                                                   struct tevent_context *ev,
 679                                                   struct gensec_security *gensec_security,
 680                                                   const DATA_BLOB in)
 681 {
 682         struct tevent_req *req = NULL;
 683         struct gensec_krb5_update_state *state = NULL;
 684         NTSTATUS status;
 685
 686         req = tevent_req_create(mem_ctx, &state,
 687                                 struct gensec_krb5_update_state);
 688         if (req == NULL) {
 689                 return NULL;
 690         }
 691
 692         status = gensec_krb5_update_internal(gensec_security,
 693                                              state, ev, in,
 694                                              &state->out);
 695         state->status = status;
 696         if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 697                 tevent_req_done(req);
 698                 return tevent_req_post(req, ev);
 699         }
 700         if (tevent_req_nterror(req, status)) {
 701                 return tevent_req_post(req, ev);
 702         }
 703
 704         tevent_req_done(req);
 705         return tevent_req_post(req, ev);
 706 }
 707
 708 static NTSTATUS gensec_krb5_update_recv(struct tevent_req *req,
 709                                         TALLOC_CTX *out_mem_ctx,
 710                                         DATA_BLOB *out)
 711 {
 712         struct gensec_krb5_update_state *state =
 713                 tevent_req_data(req,
 714                 struct gensec_krb5_update_state);
 715         NTSTATUS status;
 716
 717         *out = data_blob_null;
 718
 719         if (tevent_req_is_nterror(req, &status)) {
 720                 tevent_req_received(req);
 721                 return status;
 722         }
 723
 724         *out = state->out;
 725         talloc_steal(out_mem_ctx, state->out.data);
 726         status = state->status;
 727         tevent_req_received(req);
 728         return status;
 729 }
 730
 731 static NTSTATUS gensec_krb5_session_key(struct gensec_security *gensec_security,
 732                                         TALLOC_CTX *mem_ctx,
 733                                         DATA_BLOB *session_key)
 734 {
 735         struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
 736         krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
 737         krb5_auth_context auth_context = gensec_krb5_state->auth_context;
 738         krb5_error_code err = -1;
 739         bool remote = false;
 740         bool ok;
 741
 742         if (gensec_krb5_state->state_position != GENSEC_KRB5_DONE) {
 743                 return NT_STATUS_NO_USER_SESSION_KEY;
 744         }
 745
 746         switch (gensec_security->gensec_role) {
 747         case GENSEC_CLIENT:
 748                 remote = false;
 749                 break;
 750         case GENSEC_SERVER:
 751                 remote = true;
 752                 break;
 753         }
 754
 755         ok = smb_krb5_get_smb_session_key(mem_ctx,
 756                                           context,
 757                                           auth_context,
 758                                           session_key,
 759                                           remote);
 760         if (!ok) {
 761                 DEBUG(10, ("KRB5 error getting session key %d\n", err));
 762                 return NT_STATUS_NO_USER_SESSION_KEY;
 763         }
 764
 765         return NT_STATUS_OK;
 766 }
 767
 768 #ifdef SAMBA4_USES_HEIMDAL
 769 static NTSTATUS gensec_krb5_session_info(struct gensec_security *gensec_security,
 770                                          TALLOC_CTX *mem_ctx,
 771                                          struct auth_session_info **_session_info)
 772 {
 773         NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
 774         struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
 775         krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
 776         struct auth_session_info *session_info = NULL;
 777
 778         krb5_principal client_principal;
 779         char *principal_string = NULL;
 780
 781         DATA_BLOB pac_blob, *pac_blob_ptr = NULL;
 782         krb5_data pac_data;
 783
 784         krb5_error_code ret;
 785
 786         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 787         if (!tmp_ctx) {
 788                 return NT_STATUS_NO_MEMORY;
 789         }
 790
 791         ret = krb5_ticket_get_client(context, gensec_krb5_state->ticket, &client_principal);
 792         if (ret) {
 793                 DEBUG(5, ("krb5_ticket_get_client failed to get client principal: %s\n",
 794                           smb_get_krb5_error_message(context,
 795                                                      ret, tmp_ctx)));
 796                 talloc_free(tmp_ctx);
 797                 return NT_STATUS_NO_MEMORY;
 798         }
 799
 800         ret = krb5_unparse_name(gensec_krb5_state->smb_krb5_context->krb5_context,
 801                                 client_principal, &principal_string);
 802         if (ret) {
 803                 DEBUG(1, ("Unable to parse client principal: %s\n",
 804                           smb_get_krb5_error_message(context,
 805                                                      ret, tmp_ctx)));
 806                 krb5_free_principal(context, client_principal);
 807                 talloc_free(tmp_ctx);
 808                 return NT_STATUS_NO_MEMORY;
 809         }
 810
 811         ret = krb5_ticket_get_authorization_data_type(context, gensec_krb5_state->ticket,
 812                                                       KRB5_AUTHDATA_WIN2K_PAC,
 813                                                       &pac_data);
 814
 815         if (ret) {
 816                 /* NO pac */
 817                 DEBUG(5, ("krb5_ticket_get_authorization_data_type failed to find PAC: %s\n",
 818                           smb_get_krb5_error_message(context,
 819                                                      ret, tmp_ctx)));
 820         } else {
 821                 /* Found pac */
 822                 pac_blob = data_blob_talloc(tmp_ctx, pac_data.data, pac_data.length);
 823                 smb_krb5_free_data_contents(context, &pac_data);
 824                 if (!pac_blob.data) {
 825                         free(principal_string);
 826                         krb5_free_principal(context, client_principal);
 827                         talloc_free(tmp_ctx);
 828                         return NT_STATUS_NO_MEMORY;
 829                 }
 830
 831                 /* decode and verify the pac */
 832                 nt_status = kerberos_decode_pac(gensec_krb5_state,
 833                                                 pac_blob,
 834                                                 gensec_krb5_state->smb_krb5_context->krb5_context,
 835                                                 NULL, gensec_krb5_state->keyblock,
 836                                                 client_principal,
 837                                                 gensec_krb5_state->ticket->ticket.authtime, NULL);
 838
 839                 if (!NT_STATUS_IS_OK(nt_status)) {
 840                         free(principal_string);
 841                         krb5_free_principal(context, client_principal);
 842                         talloc_free(tmp_ctx);
 843                         return nt_status;
 844                 }
 845
 846                 pac_blob_ptr = &pac_blob;
 847         }
 848
 849         nt_status = gensec_generate_session_info_pac(tmp_ctx,
 850                                                      gensec_security,
 851                                                      gensec_krb5_state->smb_krb5_context,
 852                                                      pac_blob_ptr, principal_string,
 853                                                      gensec_get_remote_address(gensec_security),
 854                                                      &session_info);
 855
 856         free(principal_string);
 857         krb5_free_principal(context, client_principal);
 858
 859         if (!NT_STATUS_IS_OK(nt_status)) {
 860                 talloc_free(tmp_ctx);
 861                 return nt_status;
 862         }
 863
 864         nt_status = gensec_krb5_session_key(gensec_security, session_info, &session_info->session_key);
 865
 866         if (!NT_STATUS_IS_OK(nt_status)) {
 867                 talloc_free(tmp_ctx);
 868                 return nt_status;
 869         }
 870
 871         *_session_info = talloc_steal(mem_ctx, session_info);
 872
 873         talloc_free(tmp_ctx);
 874         return NT_STATUS_OK;
 875 }
 876 #else /* MIT KERBEROS */
 877 static NTSTATUS gensec_krb5_session_info(struct gensec_security *gensec_security,
 878                                          TALLOC_CTX *mem_ctx,
 879                                          struct auth_session_info **psession_info)
 880 {
 881         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 882         struct gensec_krb5_state *gensec_krb5_state =
 883                 (struct gensec_krb5_state *)gensec_security->private_data;
 884         krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
 885         struct auth_session_info *session_info = NULL;
 886
 887         krb5_principal client_principal;
 888         char *principal_string = NULL;
 889
 890         krb5_authdata **auth_pac_data = NULL;
 891         DATA_BLOB pac_blob, *pac_blob_ptr = NULL;
 892
 893         krb5_error_code code;
 894
 895         TALLOC_CTX *tmp_ctx;
 896
 897         tmp_ctx = talloc_new(mem_ctx);
 898         if (tmp_ctx == NULL) {
 899                 return NT_STATUS_NO_MEMORY;
 900         }
 901
 902         code = krb5_copy_principal(context,
 903                                    gensec_krb5_state->ticket->enc_part2->client,
 904                                    &client_principal);
 905         if (code != 0) {
 906                 DBG_INFO("krb5_copy_principal failed to copy client "
 907                          "principal: %s\n",
 908                          smb_get_krb5_error_message(context, code, tmp_ctx));
 909                 talloc_free(tmp_ctx);
 910                 return NT_STATUS_NO_MEMORY;
 911         }
 912
 913         code = krb5_unparse_name(context, client_principal, &principal_string);
 914         if (code != 0) {
 915                 DBG_WARNING("Unable to parse client principal: %s\n",
 916                             smb_get_krb5_error_message(context, code, tmp_ctx));
 917                 krb5_free_principal(context, client_principal);
 918                 talloc_free(tmp_ctx);
 919                 return NT_STATUS_NO_MEMORY;
 920         }
 921
 922         code = krb5_find_authdata(context,
 923                                   gensec_krb5_state->ticket->enc_part2->authorization_data,
 924                                   NULL,
 925                                   KRB5_AUTHDATA_WIN2K_PAC,
 926                                   &auth_pac_data);
 927         if (code != 0) {
 928                 /* NO pac */
 929                 DBG_INFO("krb5_find_authdata failed to find PAC: %s\n",
 930                          smb_get_krb5_error_message(context, code, tmp_ctx));
 931         } else {
 932                 krb5_timestamp ticket_authtime =
 933                         gensec_krb5_state->ticket->enc_part2->times.authtime;
 934
 935                 /* Found pac */
 936                 pac_blob = data_blob_talloc(tmp_ctx,
 937                                             auth_pac_data[0]->contents,
 938                                             auth_pac_data[0]->length);
 939                 krb5_free_authdata(context, auth_pac_data);
 940                 if (pac_blob.data == NULL) {
 941                         free(principal_string);
 942                         krb5_free_principal(context, client_principal);
 943                         talloc_free(tmp_ctx);
 944                         return NT_STATUS_NO_MEMORY;
 945                 }
 946
 947                 /* decode and verify the pac */
 948                 status = kerberos_decode_pac(gensec_krb5_state,
 949                                              pac_blob,
 950                                              context,
 951                                              NULL,
 952                                              gensec_krb5_state->keyblock,
 953                                              client_principal,
 954                                              ticket_authtime,
 955                                              NULL);
 956
 957                 if (!NT_STATUS_IS_OK(status)) {
 958                         free(principal_string);
 959                         krb5_free_principal(context, client_principal);
 960                         talloc_free(tmp_ctx);
 961                         return status;
 962                 }
 963
 964                 pac_blob_ptr = &pac_blob;
 965         }
 966         krb5_free_principal(context, client_principal);
 967
 968         status = gensec_generate_session_info_pac(tmp_ctx,
 969                                                   gensec_security,
 970                                                   gensec_krb5_state->smb_krb5_context,
 971                                                   pac_blob_ptr,
 972                                                   principal_string,
 973                                                   gensec_get_remote_address(gensec_security),
 974                                                   &session_info);
 975         SAFE_FREE(principal_string);
 976         if (!NT_STATUS_IS_OK(status)) {
 977                 talloc_free(tmp_ctx);
 978                 return status;
 979         }
 980
 981         status = gensec_krb5_session_key(gensec_security,
 982                                          session_info,
 983                                          &session_info->session_key);
 984         if (!NT_STATUS_IS_OK(status)) {
 985                 talloc_free(tmp_ctx);
 986                 return status;
 987         }
 988
 989         *psession_info = talloc_steal(mem_ctx, session_info);
 990         talloc_free(tmp_ctx);
 991
 992         return NT_STATUS_OK;
 993 }
 994 #endif /* SAMBA4_USES_HEIMDAL */
 995
 996 static NTSTATUS gensec_krb5_wrap(struct gensec_security *gensec_security,
 997                                    TALLOC_CTX *mem_ctx,
 998                                    const DATA_BLOB *in,
 999                                    DATA_BLOB *out)
1000 {
1001         struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
1002         krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
1003         krb5_auth_context auth_context = gensec_krb5_state->auth_context;
1004         krb5_error_code ret;
1005         krb5_data input, output;
1006         input.length = in->length;
1007         input.data = (char *)in->data;
1008
1009         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
1010                 ret = krb5_mk_priv(context, auth_context, &input, &output, NULL);
1011                 if (ret) {
1012                         DEBUG(1, ("krb5_mk_priv failed: %s\n",
1013                                   smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
1014                                                              ret, mem_ctx)));
1015                         return NT_STATUS_ACCESS_DENIED;
1016                 }
1017                 *out = data_blob_talloc(mem_ctx, output.data, output.length);
1018
1019                 smb_krb5_free_data_contents(context, &output);
1020         } else {
1021                 return NT_STATUS_ACCESS_DENIED;
1022         }
1023         return NT_STATUS_OK;
1024 }
1025
1026 static NTSTATUS gensec_krb5_unwrap(struct gensec_security *gensec_security,
1027                                      TALLOC_CTX *mem_ctx,
1028                                      const DATA_BLOB *in,
1029                                      DATA_BLOB *out)
1030 {
1031         struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
1032         krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
1033         krb5_auth_context auth_context = gensec_krb5_state->auth_context;
1034         krb5_error_code ret;
1035         krb5_data input, output;
1036         krb5_replay_data replay;
1037         input.length = in->length;
1038         input.data = (char *)in->data;
1039
1040         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
1041                 ret = krb5_rd_priv(context, auth_context, &input, &output, &replay);
1042                 if (ret) {
1043                         DEBUG(1, ("krb5_rd_priv failed: %s\n",
1044                                   smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
1045                                                              ret, mem_ctx)));
1046                         return NT_STATUS_ACCESS_DENIED;
1047                 }
1048                 *out = data_blob_talloc(mem_ctx, output.data, output.length);
1049
1050                 smb_krb5_free_data_contents(context, &output);
1051         } else {
1052                 return NT_STATUS_ACCESS_DENIED;
1053         }
1054         return NT_STATUS_OK;
1055 }
1056
1057 static bool gensec_krb5_have_feature(struct gensec_security *gensec_security,
1058                                      uint32_t feature)
1059 {
1060         struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
1061         if (feature & GENSEC_FEATURE_SESSION_KEY) {
1062                 return true;
1063         }
1064         if (gensec_krb5_state->gssapi) {
1065                 return false;
1066         }
1067
1068         /*
1069          * krb5_mk_priv provides SIGN and SEAL
1070          */
1071         if (feature & GENSEC_FEATURE_SIGN) {
1072                 return true;
1073         }
1074         if (feature & GENSEC_FEATURE_SEAL) {
1075                 return true;
1076         }
1077
1078         return false;
1079 }
1080
1081 static const char *gensec_krb5_final_auth_type(struct gensec_security *gensec_security)
1082 {
1083         return GENSEC_FINAL_AUTH_TYPE_KRB5;
1084 }
1085
1086 static const char *gensec_krb5_oids[] = {
1087         GENSEC_OID_KERBEROS5,
1088         GENSEC_OID_KERBEROS5_OLD,
1089         NULL
1090 };
1091
1092 static const struct gensec_security_ops gensec_fake_gssapi_krb5_security_ops = {
1093         .name           = "fake_gssapi_krb5",
1094         .auth_type      = DCERPC_AUTH_TYPE_KRB5,
1095         .oid            = gensec_krb5_oids,
1096         .client_start   = gensec_fake_gssapi_krb5_client_start,
1097         .server_start   = gensec_fake_gssapi_krb5_server_start,
1098         .update_send    = gensec_krb5_update_send,
1099         .update_recv    = gensec_krb5_update_recv,
1100         .magic          = gensec_magic_check_krb5_oid,
1101         .session_key    = gensec_krb5_session_key,
1102         .session_info   = gensec_krb5_session_info,
1103         .have_feature   = gensec_krb5_have_feature,
1104         .final_auth_type = gensec_krb5_final_auth_type,
1105         .enabled        = false,
1106         .kerberos       = true,
1107         .priority       = GENSEC_KRB5,
1108 };
1109
1110 static const struct gensec_security_ops gensec_krb5_security_ops = {
1111         .name           = "krb5",
1112         .client_start   = gensec_krb5_client_start,
1113         .server_start   = gensec_krb5_server_start,
1114         .update_send    = gensec_krb5_update_send,
1115         .update_recv    = gensec_krb5_update_recv,
1116         .session_key    = gensec_krb5_session_key,
1117         .session_info   = gensec_krb5_session_info,
1118         .have_feature   = gensec_krb5_have_feature,
1119         .wrap           = gensec_krb5_wrap,
1120         .unwrap         = gensec_krb5_unwrap,
1121         .final_auth_type = gensec_krb5_final_auth_type,
1122         .enabled        = true,
1123         .kerberos       = true,
1124         .priority       = GENSEC_KRB5
1125 };
1126
1127 _PUBLIC_ NTSTATUS gensec_krb5_init(TALLOC_CTX *ctx)
1128 {
1129         NTSTATUS ret;
1130
1131         ret = gensec_register(ctx, &gensec_krb5_security_ops);
1132         if (!NT_STATUS_IS_OK(ret)) {
1133                 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1134                         gensec_krb5_security_ops.name));
1135                 return ret;
1136         }
1137
1138         ret = gensec_register(ctx, &gensec_fake_gssapi_krb5_security_ops);
1139         if (!NT_STATUS_IS_OK(ret)) {
1140                 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1141                         gensec_fake_gssapi_krb5_security_ops.name));
1142                 return ret;
1143         }
1144
1145         return ret;
1146 }