source/auth/gensec/gensec_gssapi.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Kerberos backend for GENSEC
   5
   6    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
   7    Copyright (C) Stefan Metzmacher <metze@samba.org> 2004-2005
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "lib/events/events.h"
  26 #include "system/kerberos.h"
  27 #include "auth/kerberos/kerberos.h"
  28 #include "librpc/gen_ndr/krb5pac.h"
  29 #include "auth/auth.h"
  30 #include "lib/ldb/include/ldb.h"
  31 #include "auth/auth_sam.h"
  32 #include "librpc/rpc/dcerpc.h"
  33 #include "auth/credentials/credentials.h"
  34 #include "auth/credentials/credentials_krb5.h"
  35 #include "auth/gensec/gensec.h"
  36 #include "auth/gensec/gensec_proto.h"
  37 #include "param/param.h"
  38 #include "auth/session_proto.h"
  39 #include <gssapi/gssapi.h>
  40 #include <gssapi/gssapi_krb5.h>
  41
  42 enum gensec_gssapi_sasl_state
  43 {
  44         STAGE_GSS_NEG,
  45         STAGE_SASL_SSF_NEG,
  46         STAGE_SASL_SSF_ACCEPT,
  47         STAGE_DONE
  48 };
  49
  50 #define NEG_SEAL 0x4
  51 #define NEG_SIGN 0x2
  52 #define NEG_NONE 0x1
  53
  54 struct gensec_gssapi_state {
  55         gss_ctx_id_t gssapi_context;
  56         struct gss_channel_bindings_struct *input_chan_bindings;
  57         gss_name_t server_name;
  58         gss_name_t client_name;
  59         OM_uint32 want_flags, got_flags;
  60         gss_OID gss_oid;
  61
  62         DATA_BLOB session_key;
  63         DATA_BLOB pac;
  64
  65         struct smb_krb5_context *smb_krb5_context;
  66         struct gssapi_creds_container *client_cred;
  67         struct gssapi_creds_container *server_cred;
  68         gss_krb5_lucid_context_v1_t *lucid;
  69
  70         gss_cred_id_t delegated_cred_handle;
  71
  72         bool sasl; /* We have two different mechs in this file: One
  73                     * for SASL wrapped GSSAPI and another for normal
  74                     * GSSAPI */
  75         enum gensec_gssapi_sasl_state sasl_state;
  76         uint8_t sasl_protection; /* What was negotiated at the SASL
  77                                   * layer, independent of the GSSAPI
  78                                   * layer... */
  79
  80         size_t max_wrap_buf_size;
  81         int gss_exchange_count;
  82         size_t sig_size;
  83 };
  84
  85 static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security);
  86 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security);
  87
  88 static char *gssapi_error_string(TALLOC_CTX *mem_ctx,
  89                                  OM_uint32 maj_stat, OM_uint32 min_stat,
  90                                  const gss_OID mech)
  91 {
  92         OM_uint32 disp_min_stat, disp_maj_stat;
  93         gss_buffer_desc maj_error_message;
  94         gss_buffer_desc min_error_message;
  95         char *maj_error_string, *min_error_string;
  96         OM_uint32 msg_ctx = 0;
  97
  98         char *ret;
  99
 100         maj_error_message.value = NULL;
 101         min_error_message.value = NULL;
 102         maj_error_message.length = 0;
 103         min_error_message.length = 0;
 104
 105         disp_maj_stat = gss_display_status(&disp_min_stat, maj_stat, GSS_C_GSS_CODE,
 106                            mech, &msg_ctx, &maj_error_message);
 107         disp_maj_stat = gss_display_status(&disp_min_stat, min_stat, GSS_C_MECH_CODE,
 108                            mech, &msg_ctx, &min_error_message);
 109
 110         maj_error_string = talloc_strndup(mem_ctx, (char *)maj_error_message.value, maj_error_message.length);
 111
 112         min_error_string = talloc_strndup(mem_ctx, (char *)min_error_message.value, min_error_message.length);
 113
 114         ret = talloc_asprintf(mem_ctx, "%s: %s", maj_error_string, min_error_string);
 115
 116         talloc_free(maj_error_string);
 117         talloc_free(min_error_string);
 118
 119         gss_release_buffer(&disp_min_stat, &maj_error_message);
 120         gss_release_buffer(&disp_min_stat, &min_error_message);
 121
 122         return ret;
 123 }
 124
 125
 126 static int gensec_gssapi_destructor(struct gensec_gssapi_state *gensec_gssapi_state)
 127 {
 128         OM_uint32 maj_stat, min_stat;
 129
 130         if (gensec_gssapi_state->delegated_cred_handle != GSS_C_NO_CREDENTIAL) {
 131                 maj_stat = gss_release_cred(&min_stat,
 132                                             &gensec_gssapi_state->delegated_cred_handle);
 133         }
 134
 135         if (gensec_gssapi_state->gssapi_context != GSS_C_NO_CONTEXT) {
 136                 maj_stat = gss_delete_sec_context (&min_stat,
 137                                                    &gensec_gssapi_state->gssapi_context,
 138                                                    GSS_C_NO_BUFFER);
 139         }
 140
 141         if (gensec_gssapi_state->server_name != GSS_C_NO_NAME) {
 142                 maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->server_name);
 143         }
 144         if (gensec_gssapi_state->client_name != GSS_C_NO_NAME) {
 145                 maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->client_name);
 146         }
 147
 148         if (gensec_gssapi_state->lucid) {
 149                 gss_krb5_free_lucid_sec_context(&min_stat, gensec_gssapi_state->lucid);
 150         }
 151
 152         return 0;
 153 }
 154
 155 static NTSTATUS gensec_gssapi_init_lucid(struct gensec_gssapi_state *gensec_gssapi_state)
 156 {
 157         OM_uint32 maj_stat, min_stat;
 158
 159         if (gensec_gssapi_state->lucid) {
 160                 return NT_STATUS_OK;
 161         }
 162
 163         maj_stat = gss_krb5_export_lucid_sec_context(&min_stat,
 164                                                      &gensec_gssapi_state->gssapi_context,
 165                                                      1,
 166                                                      (void **)&gensec_gssapi_state->lucid);
 167         if (maj_stat != GSS_S_COMPLETE) {
 168                 DEBUG(0,("gensec_gssapi_init_lucid: %s\n",
 169                         gssapi_error_string(gensec_gssapi_state,
 170                                             maj_stat, min_stat,
 171                                             gensec_gssapi_state->gss_oid)));
 172                 return NT_STATUS_INTERNAL_ERROR;
 173         }
 174
 175         if (gensec_gssapi_state->lucid->version != 1) {
 176                 DEBUG(0,("gensec_gssapi_init_lucid: lucid version[%d] != 1\n",
 177                         gensec_gssapi_state->lucid->version));
 178                 gss_krb5_free_lucid_sec_context(&min_stat, gensec_gssapi_state->lucid);
 179                 gensec_gssapi_state->lucid = NULL;
 180                 return NT_STATUS_INTERNAL_ERROR;
 181         }
 182
 183         return NT_STATUS_OK;
 184 }
 185
 186 static NTSTATUS gensec_gssapi_start(struct gensec_security *gensec_security)
 187 {
 188         struct gensec_gssapi_state *gensec_gssapi_state;
 189         krb5_error_code ret;
 190         struct gsskrb5_send_to_kdc send_to_kdc;
 191
 192         gensec_gssapi_state = talloc(gensec_security, struct gensec_gssapi_state);
 193         if (!gensec_gssapi_state) {
 194                 return NT_STATUS_NO_MEMORY;
 195         }
 196
 197         gensec_gssapi_state->gss_exchange_count = 0;
 198         gensec_gssapi_state->max_wrap_buf_size
 199                 = lp_parm_int(gensec_security->lp_ctx, NULL, "gensec_gssapi", "max wrap buf size", 65536);
 200
 201         gensec_gssapi_state->sasl = false;
 202         gensec_gssapi_state->sasl_state = STAGE_GSS_NEG;
 203
 204         gensec_security->private_data = gensec_gssapi_state;
 205
 206         gensec_gssapi_state->gssapi_context = GSS_C_NO_CONTEXT;
 207         gensec_gssapi_state->server_name = GSS_C_NO_NAME;
 208         gensec_gssapi_state->client_name = GSS_C_NO_NAME;
 209         gensec_gssapi_state->lucid = NULL;
 210
 211         /* TODO: Fill in channel bindings */
 212         gensec_gssapi_state->input_chan_bindings = GSS_C_NO_CHANNEL_BINDINGS;
 213
 214         gensec_gssapi_state->want_flags = 0;
 215         if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "mutual", true)) {
 216                 gensec_gssapi_state->want_flags |= GSS_C_MUTUAL_FLAG;
 217         }
 218         if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "delegation", true)) {
 219                 gensec_gssapi_state->want_flags |= GSS_C_DELEG_FLAG;
 220         }
 221         if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "replay", true)) {
 222                 gensec_gssapi_state->want_flags |= GSS_C_REPLAY_FLAG;
 223         }
 224         if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "sequence", true)) {
 225                 gensec_gssapi_state->want_flags |= GSS_C_SEQUENCE_FLAG;
 226         }
 227
 228         gensec_gssapi_state->got_flags = 0;
 229
 230         gensec_gssapi_state->session_key = data_blob(NULL, 0);
 231         gensec_gssapi_state->pac = data_blob(NULL, 0);
 232
 233         gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
 234         gensec_gssapi_state->sig_size = 0;
 235
 236         talloc_set_destructor(gensec_gssapi_state, gensec_gssapi_destructor);
 237
 238         if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
 239                 gensec_gssapi_state->want_flags |= GSS_C_INTEG_FLAG;
 240         }
 241         if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
 242                 gensec_gssapi_state->want_flags |= GSS_C_CONF_FLAG;
 243         }
 244         if (gensec_security->want_features & GENSEC_FEATURE_DCE_STYLE) {
 245                 gensec_gssapi_state->want_flags |= GSS_C_DCE_STYLE;
 246         }
 247
 248         gensec_gssapi_state->gss_oid = GSS_C_NULL_OID;
 249
 250         send_to_kdc.func = smb_krb5_send_and_recv_func;
 251         send_to_kdc.ptr = gensec_security->event_ctx;
 252
 253         ret = gsskrb5_set_send_to_kdc(&send_to_kdc);
 254         if (ret) {
 255                 DEBUG(1,("gensec_krb5_start: gsskrb5_set_send_to_kdc failed\n"));
 256                 talloc_free(gensec_gssapi_state);
 257                 return NT_STATUS_INTERNAL_ERROR;
 258         }
 259         if (lp_realm(gensec_security->lp_ctx) && *lp_realm(gensec_security->lp_ctx)) {
 260                 char *upper_realm = strupper_talloc(gensec_gssapi_state, lp_realm(gensec_security->lp_ctx));
 261                 if (!upper_realm) {
 262                         DEBUG(1,("gensec_krb5_start: could not uppercase realm: %s\n", lp_realm(gensec_security->lp_ctx)));
 263                         talloc_free(gensec_gssapi_state);
 264                         return NT_STATUS_NO_MEMORY;
 265                 }
 266                 ret = gsskrb5_set_default_realm(upper_realm);
 267                 talloc_free(upper_realm);
 268                 if (ret) {
 269                         DEBUG(1,("gensec_krb5_start: gsskrb5_set_default_realm failed\n"));
 270                         talloc_free(gensec_gssapi_state);
 271                         return NT_STATUS_INTERNAL_ERROR;
 272                 }
 273         }
 274
 275         /* don't do DNS lookups of any kind, it might/will fail for a netbios name */
 276         ret = gsskrb5_set_dns_canonicalize(lp_parm_bool(gensec_security->lp_ctx, NULL, "krb5", "set_dns_canonicalize", false));
 277         if (ret) {
 278                 DEBUG(1,("gensec_krb5_start: gsskrb5_set_dns_canonicalize failed\n"));
 279                 talloc_free(gensec_gssapi_state);
 280                 return NT_STATUS_INTERNAL_ERROR;
 281         }
 282
 283         ret = smb_krb5_init_context(gensec_gssapi_state,
 284                                     gensec_security->event_ctx,
 285                                     gensec_security->lp_ctx,
 286                                     &gensec_gssapi_state->smb_krb5_context);
 287         if (ret) {
 288                 DEBUG(1,("gensec_krb5_start: krb5_init_context failed (%s)\n",
 289                          error_message(ret)));
 290                 talloc_free(gensec_gssapi_state);
 291                 return NT_STATUS_INTERNAL_ERROR;
 292         }
 293         return NT_STATUS_OK;
 294 }
 295
 296 static NTSTATUS gensec_gssapi_server_start(struct gensec_security *gensec_security)
 297 {
 298         NTSTATUS nt_status;
 299         int ret;
 300         struct gensec_gssapi_state *gensec_gssapi_state;
 301         struct cli_credentials *machine_account;
 302         struct gssapi_creds_container *gcc;
 303
 304         nt_status = gensec_gssapi_start(gensec_security);
 305         if (!NT_STATUS_IS_OK(nt_status)) {
 306                 return nt_status;
 307         }
 308
 309         gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 310
 311         machine_account = gensec_get_credentials(gensec_security);
 312
 313         if (!machine_account) {
 314                 DEBUG(3, ("No machine account credentials specified\n"));
 315                 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 316         } else {
 317                 ret = cli_credentials_get_server_gss_creds(machine_account,
 318                                                            gensec_security->event_ctx,
 319                                                            gensec_security->lp_ctx, &gcc);
 320                 if (ret) {
 321                         DEBUG(1, ("Aquiring acceptor credentials failed: %s\n",
 322                                   error_message(ret)));
 323                         return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 324                 }
 325         }
 326
 327         gensec_gssapi_state->server_cred = gcc;
 328         return NT_STATUS_OK;
 329
 330 }
 331
 332 static NTSTATUS gensec_gssapi_sasl_server_start(struct gensec_security *gensec_security)
 333 {
 334         NTSTATUS nt_status;
 335         struct gensec_gssapi_state *gensec_gssapi_state;
 336         nt_status = gensec_gssapi_server_start(gensec_security);
 337
 338         if (NT_STATUS_IS_OK(nt_status)) {
 339                 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 340                 gensec_gssapi_state->sasl = true;
 341         }
 342         return nt_status;
 343 }
 344
 345 static NTSTATUS gensec_gssapi_client_start(struct gensec_security *gensec_security)
 346 {
 347         struct gensec_gssapi_state *gensec_gssapi_state;
 348         struct cli_credentials *creds = gensec_get_credentials(gensec_security);
 349         krb5_error_code ret;
 350         NTSTATUS nt_status;
 351         gss_buffer_desc name_token;
 352         gss_OID name_type;
 353         OM_uint32 maj_stat, min_stat;
 354         const char *hostname = gensec_get_target_hostname(gensec_security);
 355         const char *principal;
 356         struct gssapi_creds_container *gcc;
 357
 358         if (!hostname) {
 359                 DEBUG(1, ("Could not determine hostname for target computer, cannot use kerberos\n"));
 360                 return NT_STATUS_INVALID_PARAMETER;
 361         }
 362         if (is_ipaddress(hostname)) {
 363                 DEBUG(2, ("Cannot do GSSAPI to an IP address\n"));
 364                 return NT_STATUS_INVALID_PARAMETER;
 365         }
 366         if (strcmp(hostname, "localhost") == 0) {
 367                 DEBUG(2, ("GSSAPI to 'localhost' does not make sense\n"));
 368                 return NT_STATUS_INVALID_PARAMETER;
 369         }
 370
 371         nt_status = gensec_gssapi_start(gensec_security);
 372         if (!NT_STATUS_IS_OK(nt_status)) {
 373                 return nt_status;
 374         }
 375
 376         gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 377
 378         gensec_gssapi_state->gss_oid = gss_mech_krb5;
 379
 380         principal = gensec_get_target_principal(gensec_security);
 381         if (principal && lp_client_use_spnego_principal(gensec_security->lp_ctx)) {
 382                 name_type = GSS_C_NULL_OID;
 383         } else {
 384                 principal = talloc_asprintf(gensec_gssapi_state, "%s@%s",
 385                                             gensec_get_target_service(gensec_security),
 386                                             hostname);
 387
 388                 name_type = GSS_C_NT_HOSTBASED_SERVICE;
 389         }
 390         name_token.value  = discard_const_p(uint8_t, principal);
 391         name_token.length = strlen(principal);
 392
 393
 394         maj_stat = gss_import_name (&min_stat,
 395                                     &name_token,
 396                                     name_type,
 397                                     &gensec_gssapi_state->server_name);
 398         if (maj_stat) {
 399                 DEBUG(2, ("GSS Import name of %s failed: %s\n",
 400                           (char *)name_token.value,
 401                           gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 402                 return NT_STATUS_INVALID_PARAMETER;
 403         }
 404
 405         ret = cli_credentials_get_client_gss_creds(creds,
 406                                                    gensec_security->event_ctx,
 407                                                    gensec_security->lp_ctx, &gcc);
 408         switch (ret) {
 409         case 0:
 410                 break;
 411         case KRB5KDC_ERR_PREAUTH_FAILED:
 412                 return NT_STATUS_LOGON_FAILURE;
 413         case KRB5_KDC_UNREACH:
 414                 DEBUG(3, ("Cannot reach a KDC we require to contact %s\n", principal));
 415                 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
 416         default:
 417                 DEBUG(1, ("Aquiring initiator credentials failed\n"));
 418                 return NT_STATUS_UNSUCCESSFUL;
 419         }
 420
 421         gensec_gssapi_state->client_cred = gcc;
 422         if (!talloc_reference(gensec_gssapi_state, gcc)) {
 423                 return NT_STATUS_NO_MEMORY;
 424         }
 425
 426         return NT_STATUS_OK;
 427 }
 428
 429 static NTSTATUS gensec_gssapi_sasl_client_start(struct gensec_security *gensec_security)
 430 {
 431         NTSTATUS nt_status;
 432         struct gensec_gssapi_state *gensec_gssapi_state;
 433         nt_status = gensec_gssapi_client_start(gensec_security);
 434
 435         if (NT_STATUS_IS_OK(nt_status)) {
 436                 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 437                 gensec_gssapi_state->sasl = true;
 438         }
 439         return nt_status;
 440 }
 441
 442
 443 /**
 444  * Check if the packet is one for this mechansim
 445  *
 446  * @param gensec_security GENSEC state
 447  * @param in The request, as a DATA_BLOB
 448  * @return Error, INVALID_PARAMETER if it's not a packet for us
 449  *                or NT_STATUS_OK if the packet is ok.
 450  */
 451
 452 static NTSTATUS gensec_gssapi_magic(struct gensec_security *gensec_security,
 453                                     const DATA_BLOB *in)
 454 {
 455         if (gensec_gssapi_check_oid(in, GENSEC_OID_KERBEROS5)) {
 456                 return NT_STATUS_OK;
 457         } else {
 458                 return NT_STATUS_INVALID_PARAMETER;
 459         }
 460 }
 461
 462
 463 /**
 464  * Next state function for the GSSAPI GENSEC mechanism
 465  *
 466  * @param gensec_gssapi_state GSSAPI State
 467  * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
 468  * @param in The request, as a DATA_BLOB
 469  * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
 470  * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
 471  *                or NT_STATUS_OK if the user is authenticated.
 472  */
 473
 474 static NTSTATUS gensec_gssapi_update(struct gensec_security *gensec_security,
 475                                    TALLOC_CTX *out_mem_ctx,
 476                                    const DATA_BLOB in, DATA_BLOB *out)
 477 {
 478         struct gensec_gssapi_state *gensec_gssapi_state
 479                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 480         NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
 481         OM_uint32 maj_stat, min_stat;
 482         OM_uint32 min_stat2;
 483         gss_buffer_desc input_token, output_token;
 484         gss_OID gss_oid_p = NULL;
 485         input_token.length = in.length;
 486         input_token.value = in.data;
 487
 488         switch (gensec_gssapi_state->sasl_state) {
 489         case STAGE_GSS_NEG:
 490         {
 491                 switch (gensec_security->gensec_role) {
 492                 case GENSEC_CLIENT:
 493                 {
 494                         maj_stat = gss_init_sec_context(&min_stat,
 495                                                         gensec_gssapi_state->client_cred->creds,
 496                                                         &gensec_gssapi_state->gssapi_context,
 497                                                         gensec_gssapi_state->server_name,
 498                                                         gensec_gssapi_state->gss_oid,
 499                                                         gensec_gssapi_state->want_flags,
 500                                                         0,
 501                                                         gensec_gssapi_state->input_chan_bindings,
 502                                                         &input_token,
 503                                                         &gss_oid_p,
 504                                                         &output_token,
 505                                                         &gensec_gssapi_state->got_flags, /* ret flags */
 506                                                         NULL);
 507                         if (gss_oid_p) {
 508                                 gensec_gssapi_state->gss_oid = gss_oid_p;
 509                         }
 510                         break;
 511                 }
 512                 case GENSEC_SERVER:
 513                 {
 514                         maj_stat = gss_accept_sec_context(&min_stat,
 515                                                           &gensec_gssapi_state->gssapi_context,
 516                                                           gensec_gssapi_state->server_cred->creds,
 517                                                           &input_token,
 518                                                           gensec_gssapi_state->input_chan_bindings,
 519                                                           &gensec_gssapi_state->client_name,
 520                                                           &gss_oid_p,
 521                                                           &output_token,
 522                                                           &gensec_gssapi_state->got_flags,
 523                                                           NULL,
 524                                                           &gensec_gssapi_state->delegated_cred_handle);
 525                         if (gss_oid_p) {
 526                                 gensec_gssapi_state->gss_oid = gss_oid_p;
 527                         }
 528                         break;
 529                 }
 530                 default:
 531                         return NT_STATUS_INVALID_PARAMETER;
 532
 533                 }
 534
 535                 gensec_gssapi_state->gss_exchange_count++;
 536
 537                 if (maj_stat == GSS_S_COMPLETE) {
 538                         *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
 539                         gss_release_buffer(&min_stat2, &output_token);
 540
 541                         if (gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG) {
 542                                 DEBUG(5, ("gensec_gssapi: credentials were delegated\n"));
 543                         } else {
 544                                 DEBUG(5, ("gensec_gssapi: NO credentials were delegated\n"));
 545                         }
 546
 547                         /* We may have been invoked as SASL, so there
 548                          * is more work to do */
 549                         if (gensec_gssapi_state->sasl) {
 550                                 /* Due to a very subtle interaction
 551                                  * with SASL and the LDAP libs, we
 552                                  * must ensure the data pointer is
 553                                  * != NULL, but the length is 0.
 554                                  *
 555                                  * This ensures we send a 'zero
 556                                  * length' (rather than NULL) response
 557                                  */
 558
 559                                 if (!out->data) {
 560                                         out->data = (uint8_t *)talloc_strdup(out_mem_ctx, "\0");
 561                                 }
 562
 563                                 gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_NEG;
 564                                 return NT_STATUS_MORE_PROCESSING_REQUIRED;
 565                         } else {
 566                                 gensec_gssapi_state->sasl_state = STAGE_DONE;
 567
 568                                 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 569                                         DEBUG(5, ("GSSAPI Connection will be cryptographicly sealed\n"));
 570                                 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 571                                         DEBUG(5, ("GSSAPI Connection will be cryptographicly signed\n"));
 572                                 } else {
 573                                         DEBUG(5, ("GSSAPI Connection will have no cryptographic protection\n"));
 574                                 }
 575
 576                                 return NT_STATUS_OK;
 577                         }
 578                 } else if (maj_stat == GSS_S_CONTINUE_NEEDED) {
 579                         *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
 580                         gss_release_buffer(&min_stat2, &output_token);
 581
 582                         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 583                 } else if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
 584                         switch (min_stat) {
 585                         case KRB5_KDC_UNREACH:
 586                                 DEBUG(3, ("Cannot reach a KDC we require: %s\n",
 587                                           gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 588                                 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
 589                         case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN:
 590                                 DEBUG(3, ("Server is not registered with our KDC: %s\n",
 591                                           gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 592                                 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
 593                         case KRB5KRB_AP_ERR_MSG_TYPE:
 594                                 /* garbage input, possibly from the auto-mech detection */
 595                                 return NT_STATUS_INVALID_PARAMETER;
 596                         default:
 597                                 DEBUG(1, ("GSS Update(krb5)(%d) Update failed: %s\n",
 598                                           gensec_gssapi_state->gss_exchange_count,
 599                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 600                                 return nt_status;
 601                         }
 602                 } else {
 603                         DEBUG(1, ("GSS Update(%d) failed: %s\n",
 604                                   gensec_gssapi_state->gss_exchange_count,
 605                                   gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 606                         return nt_status;
 607                 }
 608                 break;
 609         }
 610
 611         /* These last two stages are only done if we were invoked as SASL */
 612         case STAGE_SASL_SSF_NEG:
 613         {
 614                 switch (gensec_security->gensec_role) {
 615                 case GENSEC_CLIENT:
 616                 {
 617                         uint8_t maxlength_proposed[4];
 618                         uint8_t maxlength_accepted[4];
 619                         uint8_t security_supported;
 620                         int conf_state;
 621                         gss_qop_t qop_state;
 622                         input_token.length = in.length;
 623                         input_token.value = in.data;
 624
 625                         /* As a client, we have just send a
 626                          * zero-length blob to the server (after the
 627                          * normal GSSAPI exchange), and it has replied
 628                          * with it's SASL negotiation */
 629
 630                         maj_stat = gss_unwrap(&min_stat,
 631                                               gensec_gssapi_state->gssapi_context,
 632                                               &input_token,
 633                                               &output_token,
 634                                               &conf_state,
 635                                               &qop_state);
 636                         if (GSS_ERROR(maj_stat)) {
 637                                 DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
 638                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 639                                 return NT_STATUS_ACCESS_DENIED;
 640                         }
 641
 642                         if (output_token.length < 4) {
 643                                 return NT_STATUS_INVALID_PARAMETER;
 644                         }
 645
 646                         memcpy(maxlength_proposed, output_token.value, 4);
 647                         gss_release_buffer(&min_stat, &output_token);
 648
 649                         /* first byte is the proposed security */
 650                         security_supported = maxlength_proposed[0];
 651                         maxlength_proposed[0] = '\0';
 652
 653                         /* Rest is the proposed max wrap length */
 654                         gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_proposed, 0),
 655                                                                      gensec_gssapi_state->max_wrap_buf_size);
 656                         gensec_gssapi_state->sasl_protection = 0;
 657                         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 658                                 if (security_supported & NEG_SEAL) {
 659                                         gensec_gssapi_state->sasl_protection |= NEG_SEAL;
 660                                 }
 661                         } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 662                                 if (security_supported & NEG_SIGN) {
 663                                         gensec_gssapi_state->sasl_protection |= NEG_SIGN;
 664                                 }
 665                         } else if (security_supported & NEG_NONE) {
 666                                 gensec_gssapi_state->sasl_protection |= NEG_NONE;
 667                         } else {
 668                                 DEBUG(1, ("Remote server does not support unprotected connections"));
 669                                 return NT_STATUS_ACCESS_DENIED;
 670                         }
 671
 672                         /* Send back the negotiated max length */
 673
 674                         RSIVAL(maxlength_accepted, 0, gensec_gssapi_state->max_wrap_buf_size);
 675
 676                         maxlength_accepted[0] = gensec_gssapi_state->sasl_protection;
 677
 678                         input_token.value = maxlength_accepted;
 679                         input_token.length = sizeof(maxlength_accepted);
 680
 681                         maj_stat = gss_wrap(&min_stat,
 682                                             gensec_gssapi_state->gssapi_context,
 683                                             false,
 684                                             GSS_C_QOP_DEFAULT,
 685                                             &input_token,
 686                                             &conf_state,
 687                                             &output_token);
 688                         if (GSS_ERROR(maj_stat)) {
 689                                 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
 690                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 691                                 return NT_STATUS_ACCESS_DENIED;
 692                         }
 693
 694                         *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
 695                         gss_release_buffer(&min_stat, &output_token);
 696
 697                         /* quirk:  This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
 698                         gensec_gssapi_state->sasl_state = STAGE_DONE;
 699
 700                         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 701                                 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographicly sealed\n"));
 702                         } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 703                                 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographicly signed\n"));
 704                         } else {
 705                                 DEBUG(3, ("SASL/GSSAPI Connection to server will have no cryptographicly protection\n"));
 706                         }
 707
 708                         return NT_STATUS_OK;
 709                 }
 710                 case GENSEC_SERVER:
 711                 {
 712                         uint8_t maxlength_proposed[4];
 713                         uint8_t security_supported = 0x0;
 714                         int conf_state;
 715
 716                         /* As a server, we have just been sent a zero-length blob (note this, but it isn't fatal) */
 717                         if (in.length != 0) {
 718                                 DEBUG(1, ("SASL/GSSAPI: client sent non-zero length starting SASL negotiation!\n"));
 719                         }
 720
 721                         /* Give the client some idea what we will support */
 722
 723                         RSIVAL(maxlength_proposed, 0, gensec_gssapi_state->max_wrap_buf_size);
 724                         /* first byte is the proposed security */
 725                         maxlength_proposed[0] = '\0';
 726
 727                         gensec_gssapi_state->sasl_protection = 0;
 728                         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 729                                 security_supported |= NEG_SEAL;
 730                         }
 731                         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 732                                 security_supported |= NEG_SIGN;
 733                         }
 734                         if (security_supported == 0) {
 735                                 /* If we don't support anything, this must be 0 */
 736                                 RSIVAL(maxlength_proposed, 0, 0x0);
 737                         }
 738
 739                         /* TODO:  We may not wish to support this */
 740                         security_supported |= NEG_NONE;
 741                         maxlength_proposed[0] = security_supported;
 742
 743                         input_token.value = maxlength_proposed;
 744                         input_token.length = sizeof(maxlength_proposed);
 745
 746                         maj_stat = gss_wrap(&min_stat,
 747                                             gensec_gssapi_state->gssapi_context,
 748                                             false,
 749                                             GSS_C_QOP_DEFAULT,
 750                                             &input_token,
 751                                             &conf_state,
 752                                             &output_token);
 753                         if (GSS_ERROR(maj_stat)) {
 754                                 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
 755                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 756                                 return NT_STATUS_ACCESS_DENIED;
 757                         }
 758
 759                         *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
 760                         gss_release_buffer(&min_stat, &output_token);
 761
 762                         gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_ACCEPT;
 763                         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 764                 }
 765                 default:
 766                         return NT_STATUS_INVALID_PARAMETER;
 767
 768                 }
 769         }
 770         /* This is s server-only stage */
 771         case STAGE_SASL_SSF_ACCEPT:
 772         {
 773                 uint8_t maxlength_accepted[4];
 774                 uint8_t security_accepted;
 775                 int conf_state;
 776                 gss_qop_t qop_state;
 777                 input_token.length = in.length;
 778                 input_token.value = in.data;
 779
 780                 maj_stat = gss_unwrap(&min_stat,
 781                                       gensec_gssapi_state->gssapi_context,
 782                                       &input_token,
 783                                       &output_token,
 784                                       &conf_state,
 785                                       &qop_state);
 786                 if (GSS_ERROR(maj_stat)) {
 787                         DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
 788                                   gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 789                         return NT_STATUS_ACCESS_DENIED;
 790                 }
 791
 792                 if (output_token.length < 4) {
 793                         return NT_STATUS_INVALID_PARAMETER;
 794                 }
 795
 796                 memcpy(maxlength_accepted, output_token.value, 4);
 797                 gss_release_buffer(&min_stat, &output_token);
 798
 799                 /* first byte is the proposed security */
 800                 security_accepted = maxlength_accepted[0];
 801                 maxlength_accepted[0] = '\0';
 802
 803                 /* Rest is the proposed max wrap length */
 804                 gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_accepted, 0),
 805                                                              gensec_gssapi_state->max_wrap_buf_size);
 806
 807                 gensec_gssapi_state->sasl_protection = 0;
 808                 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 809                         if (security_accepted & NEG_SEAL) {
 810                                 gensec_gssapi_state->sasl_protection |= NEG_SEAL;
 811                         }
 812                 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 813                         if (security_accepted & NEG_SIGN) {
 814                                 gensec_gssapi_state->sasl_protection |= NEG_SIGN;
 815                         }
 816                 } else if (security_accepted & NEG_NONE) {
 817                         gensec_gssapi_state->sasl_protection |= NEG_NONE;
 818                 } else {
 819                         DEBUG(1, ("Remote client does not support unprotected connections, but we failed to negotiate anything better"));
 820                         return NT_STATUS_ACCESS_DENIED;
 821                 }
 822
 823                 /* quirk:  This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
 824                 gensec_gssapi_state->sasl_state = STAGE_DONE;
 825                 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 826                         DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographicly sealed\n"));
 827                 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 828                         DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographicly signed\n"));
 829                 } else {
 830                         DEBUG(5, ("SASL/GSSAPI Connection from client will have no cryptographic protection\n"));
 831                 }
 832
 833                 *out = data_blob(NULL, 0);
 834                 return NT_STATUS_OK;
 835         }
 836         default:
 837                 return NT_STATUS_INVALID_PARAMETER;
 838         }
 839 }
 840
 841 static NTSTATUS gensec_gssapi_wrap(struct gensec_security *gensec_security,
 842                                    TALLOC_CTX *mem_ctx,
 843                                    const DATA_BLOB *in,
 844                                    DATA_BLOB *out)
 845 {
 846         struct gensec_gssapi_state *gensec_gssapi_state
 847                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 848         OM_uint32 maj_stat, min_stat;
 849         gss_buffer_desc input_token, output_token;
 850         int conf_state;
 851         input_token.length = in->length;
 852         input_token.value = in->data;
 853
 854         maj_stat = gss_wrap(&min_stat,
 855                             gensec_gssapi_state->gssapi_context,
 856                             gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
 857                             GSS_C_QOP_DEFAULT,
 858                             &input_token,
 859                             &conf_state,
 860                             &output_token);
 861         if (GSS_ERROR(maj_stat)) {
 862                 DEBUG(1, ("gensec_gssapi_wrap: GSS Wrap failed: %s\n",
 863                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 864                 return NT_STATUS_ACCESS_DENIED;
 865         }
 866
 867         *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
 868         gss_release_buffer(&min_stat, &output_token);
 869
 870         if (gensec_gssapi_state->sasl) {
 871                 size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
 872                 if (max_wrapped_size < out->length) {
 873                         DEBUG(1, ("gensec_gssapi_wrap: when wrapped, INPUT data (%u) is grew to be larger than SASL negotiated maximum output size (%u > %u)\n",
 874                                   (unsigned)in->length,
 875                                   (unsigned)out->length,
 876                                   (unsigned int)max_wrapped_size));
 877                         return NT_STATUS_INVALID_PARAMETER;
 878                 }
 879         }
 880
 881         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
 882             && !conf_state) {
 883                 return NT_STATUS_ACCESS_DENIED;
 884         }
 885         return NT_STATUS_OK;
 886 }
 887
 888 static NTSTATUS gensec_gssapi_unwrap(struct gensec_security *gensec_security,
 889                                      TALLOC_CTX *mem_ctx,
 890                                      const DATA_BLOB *in,
 891                                      DATA_BLOB *out)
 892 {
 893         struct gensec_gssapi_state *gensec_gssapi_state
 894                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 895         OM_uint32 maj_stat, min_stat;
 896         gss_buffer_desc input_token, output_token;
 897         int conf_state;
 898         gss_qop_t qop_state;
 899         input_token.length = in->length;
 900         input_token.value = in->data;
 901
 902         if (gensec_gssapi_state->sasl) {
 903                 size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
 904                 if (max_wrapped_size < in->length) {
 905                         DEBUG(1, ("gensec_gssapi_unwrap: WRAPPED data is larger than SASL negotiated maximum size\n"));
 906                         return NT_STATUS_INVALID_PARAMETER;
 907                 }
 908         }
 909
 910         maj_stat = gss_unwrap(&min_stat,
 911                               gensec_gssapi_state->gssapi_context,
 912                               &input_token,
 913                               &output_token,
 914                               &conf_state,
 915                               &qop_state);
 916         if (GSS_ERROR(maj_stat)) {
 917                 DEBUG(1, ("gensec_gssapi_unwrap: GSS UnWrap failed: %s\n",
 918                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 919                 return NT_STATUS_ACCESS_DENIED;
 920         }
 921
 922         *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
 923         gss_release_buffer(&min_stat, &output_token);
 924
 925         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
 926             && !conf_state) {
 927                 return NT_STATUS_ACCESS_DENIED;
 928         }
 929         return NT_STATUS_OK;
 930 }
 931
 932 /* Find out the maximum input size negotiated on this connection */
 933
 934 static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security)
 935 {
 936         struct gensec_gssapi_state *gensec_gssapi_state
 937                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 938         OM_uint32 maj_stat, min_stat;
 939         OM_uint32 max_input_size;
 940
 941         maj_stat = gss_wrap_size_limit(&min_stat,
 942                                        gensec_gssapi_state->gssapi_context,
 943                                        gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
 944                                        GSS_C_QOP_DEFAULT,
 945                                        gensec_gssapi_state->max_wrap_buf_size,
 946                                        &max_input_size);
 947         if (GSS_ERROR(maj_stat)) {
 948                 TALLOC_CTX *mem_ctx = talloc_new(NULL);
 949                 DEBUG(1, ("gensec_gssapi_max_input_size: determinaing signature size with gss_wrap_size_limit failed: %s\n",
 950                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 951                 talloc_free(mem_ctx);
 952                 return 0;
 953         }
 954
 955         return max_input_size;
 956 }
 957
 958 /* Find out the maximum output size negotiated on this connection */
 959 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security)
 960 {
 961         struct gensec_gssapi_state *gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);;
 962         return gensec_gssapi_state->max_wrap_buf_size;
 963 }
 964
 965 static NTSTATUS gensec_gssapi_seal_packet(struct gensec_security *gensec_security,
 966                                           TALLOC_CTX *mem_ctx,
 967                                           uint8_t *data, size_t length,
 968                                           const uint8_t *whole_pdu, size_t pdu_length,
 969                                           DATA_BLOB *sig)
 970 {
 971         struct gensec_gssapi_state *gensec_gssapi_state
 972                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 973         OM_uint32 maj_stat, min_stat;
 974         gss_buffer_desc input_token, output_token;
 975         int conf_state;
 976         ssize_t sig_length;
 977
 978         input_token.length = length;
 979         input_token.value = data;
 980
 981         maj_stat = gss_wrap(&min_stat,
 982                             gensec_gssapi_state->gssapi_context,
 983                             gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
 984                             GSS_C_QOP_DEFAULT,
 985                             &input_token,
 986                             &conf_state,
 987                             &output_token);
 988         if (GSS_ERROR(maj_stat)) {
 989                 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap failed: %s\n",
 990                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 991                 return NT_STATUS_ACCESS_DENIED;
 992         }
 993
 994         if (output_token.length < input_token.length) {
 995                 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap length [%ld] *less* than caller length [%ld]\n",
 996                           (long)output_token.length, (long)length));
 997                 return NT_STATUS_INTERNAL_ERROR;
 998         }
 999         sig_length = output_token.length - input_token.length;
1000
1001         memcpy(data, ((uint8_t *)output_token.value) + sig_length, length);
1002         *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);
1003
1004         dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1005         dump_data_pw("gensec_gssapi_seal_packet: clear\n", data, length);
1006         dump_data_pw("gensec_gssapi_seal_packet: sealed\n", ((uint8_t *)output_token.value) + sig_length, output_token.length - sig_length);
1007
1008         gss_release_buffer(&min_stat, &output_token);
1009
1010         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
1011             && !conf_state) {
1012                 return NT_STATUS_ACCESS_DENIED;
1013         }
1014         return NT_STATUS_OK;
1015 }
1016
1017 static NTSTATUS gensec_gssapi_unseal_packet(struct gensec_security *gensec_security,
1018                                             TALLOC_CTX *mem_ctx,
1019                                             uint8_t *data, size_t length,
1020                                             const uint8_t *whole_pdu, size_t pdu_length,
1021                                             const DATA_BLOB *sig)
1022 {
1023         struct gensec_gssapi_state *gensec_gssapi_state
1024                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1025         OM_uint32 maj_stat, min_stat;
1026         gss_buffer_desc input_token, output_token;
1027         int conf_state;
1028         gss_qop_t qop_state;
1029         DATA_BLOB in;
1030
1031         dump_data_pw("gensec_gssapi_unseal_packet: sig\n", sig->data, sig->length);
1032
1033         in = data_blob_talloc(mem_ctx, NULL, sig->length + length);
1034
1035         memcpy(in.data, sig->data, sig->length);
1036         memcpy(in.data + sig->length, data, length);
1037
1038         input_token.length = in.length;
1039         input_token.value = in.data;
1040
1041         maj_stat = gss_unwrap(&min_stat,
1042                               gensec_gssapi_state->gssapi_context,
1043                               &input_token,
1044                               &output_token,
1045                               &conf_state,
1046                               &qop_state);
1047         if (GSS_ERROR(maj_stat)) {
1048                 DEBUG(1, ("gensec_gssapi_unseal_packet: GSS UnWrap failed: %s\n",
1049                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1050                 return NT_STATUS_ACCESS_DENIED;
1051         }
1052
1053         if (output_token.length != length) {
1054                 return NT_STATUS_INTERNAL_ERROR;
1055         }
1056
1057         memcpy(data, output_token.value, length);
1058
1059         gss_release_buffer(&min_stat, &output_token);
1060
1061         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
1062             && !conf_state) {
1063                 return NT_STATUS_ACCESS_DENIED;
1064         }
1065         return NT_STATUS_OK;
1066 }
1067
1068 static NTSTATUS gensec_gssapi_sign_packet(struct gensec_security *gensec_security,
1069                                           TALLOC_CTX *mem_ctx,
1070                                           const uint8_t *data, size_t length,
1071                                           const uint8_t *whole_pdu, size_t pdu_length,
1072                                           DATA_BLOB *sig)
1073 {
1074         struct gensec_gssapi_state *gensec_gssapi_state
1075                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1076         OM_uint32 maj_stat, min_stat;
1077         gss_buffer_desc input_token, output_token;
1078
1079         if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1080                 input_token.length = pdu_length;
1081                 input_token.value = discard_const_p(uint8_t *, whole_pdu);
1082         } else {
1083                 input_token.length = length;
1084                 input_token.value = discard_const_p(uint8_t *, data);
1085         }
1086
1087         maj_stat = gss_get_mic(&min_stat,
1088                             gensec_gssapi_state->gssapi_context,
1089                             GSS_C_QOP_DEFAULT,
1090                             &input_token,
1091                             &output_token);
1092         if (GSS_ERROR(maj_stat)) {
1093                 DEBUG(1, ("GSS GetMic failed: %s\n",
1094                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1095                 return NT_STATUS_ACCESS_DENIED;
1096         }
1097
1098         *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, output_token.length);
1099
1100         dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1101
1102         gss_release_buffer(&min_stat, &output_token);
1103
1104         return NT_STATUS_OK;
1105 }
1106
1107 static NTSTATUS gensec_gssapi_check_packet(struct gensec_security *gensec_security,
1108                                            TALLOC_CTX *mem_ctx,
1109                                            const uint8_t *data, size_t length,
1110                                            const uint8_t *whole_pdu, size_t pdu_length,
1111                                            const DATA_BLOB *sig)
1112 {
1113         struct gensec_gssapi_state *gensec_gssapi_state
1114                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1115         OM_uint32 maj_stat, min_stat;
1116         gss_buffer_desc input_token;
1117         gss_buffer_desc input_message;
1118         gss_qop_t qop_state;
1119
1120         dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1121
1122         if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1123                 input_message.length = pdu_length;
1124                 input_message.value = discard_const(whole_pdu);
1125         } else {
1126                 input_message.length = length;
1127                 input_message.value = discard_const(data);
1128         }
1129
1130         input_token.length = sig->length;
1131         input_token.value = sig->data;
1132
1133         maj_stat = gss_verify_mic(&min_stat,
1134                               gensec_gssapi_state->gssapi_context,
1135                               &input_message,
1136                               &input_token,
1137                               &qop_state);
1138         if (GSS_ERROR(maj_stat)) {
1139                 DEBUG(1, ("GSS VerifyMic failed: %s\n",
1140                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1141                 return NT_STATUS_ACCESS_DENIED;
1142         }
1143
1144         return NT_STATUS_OK;
1145 }
1146
1147 /* Try to figure out what features we actually got on the connection */
1148 static bool gensec_gssapi_have_feature(struct gensec_security *gensec_security,
1149                                        uint32_t feature)
1150 {
1151         struct gensec_gssapi_state *gensec_gssapi_state
1152                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1153         if (feature & GENSEC_FEATURE_SIGN) {
1154                 /* If we are going GSSAPI SASL, then we honour the second negotiation */
1155                 if (gensec_gssapi_state->sasl
1156                     && gensec_gssapi_state->sasl_state == STAGE_DONE) {
1157                         return ((gensec_gssapi_state->sasl_protection & NEG_SIGN)
1158                                 && (gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG));
1159                 }
1160                 return gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG;
1161         }
1162         if (feature & GENSEC_FEATURE_SEAL) {
1163                 /* If we are going GSSAPI SASL, then we honour the second negotiation */
1164                 if (gensec_gssapi_state->sasl
1165                     && gensec_gssapi_state->sasl_state == STAGE_DONE) {
1166                         return ((gensec_gssapi_state->sasl_protection & NEG_SEAL)
1167                                  && (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG));
1168                 }
1169                 return gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG;
1170         }
1171         if (feature & GENSEC_FEATURE_SESSION_KEY) {
1172                 /* Only for GSSAPI/Krb5 */
1173                 if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
1174                         return true;
1175                 }
1176         }
1177         if (feature & GENSEC_FEATURE_DCE_STYLE) {
1178                 return gensec_gssapi_state->got_flags & GSS_C_DCE_STYLE;
1179         }
1180         if (feature & GENSEC_FEATURE_NEW_SPNEGO) {
1181                 NTSTATUS status;
1182
1183                 if (!(gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG)) {
1184                         return false;
1185                 }
1186
1187                 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "force_new_spnego", false)) {
1188                         return true;
1189                 }
1190                 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "disable_new_spnego", false)) {
1191                         return false;
1192                 }
1193
1194                 status = gensec_gssapi_init_lucid(gensec_gssapi_state);
1195                 if (!NT_STATUS_IS_OK(status)) {
1196                         return false;
1197                 }
1198
1199                 if (gensec_gssapi_state->lucid->protocol == 1) {
1200                         return true;
1201                 }
1202
1203                 return false;
1204         }
1205         /* We can always do async (rather than strict request/reply) packets.  */
1206         if (feature & GENSEC_FEATURE_ASYNC_REPLIES) {
1207                 return true;
1208         }
1209         return false;
1210 }
1211
1212 /*
1213  * Extract the 'sesssion key' needed by SMB signing and ncacn_np
1214  * (for encrypting some passwords).
1215  *
1216  * This breaks all the abstractions, but what do you expect...
1217  */
1218 static NTSTATUS gensec_gssapi_session_key(struct gensec_security *gensec_security,
1219                                           DATA_BLOB *session_key)
1220 {
1221         struct gensec_gssapi_state *gensec_gssapi_state
1222                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1223         OM_uint32 maj_stat, min_stat;
1224         krb5_keyblock *subkey;
1225
1226         if (gensec_gssapi_state->session_key.data) {
1227                 *session_key = gensec_gssapi_state->session_key;
1228                 return NT_STATUS_OK;
1229         }
1230
1231         maj_stat = gsskrb5_get_subkey(&min_stat,
1232                                       gensec_gssapi_state->gssapi_context,
1233                                       &subkey);
1234         if (maj_stat != 0) {
1235                 DEBUG(1, ("NO session key for this mech\n"));
1236                 return NT_STATUS_NO_USER_SESSION_KEY;
1237         }
1238
1239         DEBUG(10, ("Got KRB5 session key of length %d%s\n",
1240                    (int)KRB5_KEY_LENGTH(subkey),
1241                    (gensec_gssapi_state->sasl_state == STAGE_DONE)?" (done)":""));
1242         *session_key = data_blob_talloc(gensec_gssapi_state,
1243                                         KRB5_KEY_DATA(subkey), KRB5_KEY_LENGTH(subkey));
1244         krb5_free_keyblock(gensec_gssapi_state->smb_krb5_context->krb5_context, subkey);
1245         if (gensec_gssapi_state->sasl_state == STAGE_DONE) {
1246                 /* only cache in the done stage */
1247                 gensec_gssapi_state->session_key = *session_key;
1248         }
1249         dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
1250
1251         return NT_STATUS_OK;
1252 }
1253
1254 /* Get some basic (and authorization) information about the user on
1255  * this session.  This uses either the PAC (if present) or a local
1256  * database lookup */
1257 static NTSTATUS gensec_gssapi_session_info(struct gensec_security *gensec_security,
1258                                            struct auth_session_info **_session_info)
1259 {
1260         NTSTATUS nt_status;
1261         TALLOC_CTX *mem_ctx;
1262         struct gensec_gssapi_state *gensec_gssapi_state
1263                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1264         struct auth_serversupplied_info *server_info = NULL;
1265         struct auth_session_info *session_info = NULL;
1266         struct PAC_LOGON_INFO *logon_info;
1267         OM_uint32 maj_stat, min_stat;
1268         gss_buffer_desc name_token;
1269         gss_buffer_desc pac;
1270         krb5_keyblock *keyblock;
1271         time_t authtime;
1272         krb5_principal principal;
1273         char *principal_string;
1274         DATA_BLOB pac_blob;
1275
1276         if ((gensec_gssapi_state->gss_oid->length != gss_mech_krb5->length)
1277             || (memcmp(gensec_gssapi_state->gss_oid->elements, gss_mech_krb5->elements,
1278                        gensec_gssapi_state->gss_oid->length) != 0)) {
1279                 DEBUG(1, ("NO session info available for this mech\n"));
1280                 return NT_STATUS_INVALID_PARAMETER;
1281         }
1282
1283         mem_ctx = talloc_named(gensec_gssapi_state, 0, "gensec_gssapi_session_info context");
1284         NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
1285
1286         maj_stat = gss_display_name (&min_stat,
1287                                      gensec_gssapi_state->client_name,
1288                                      &name_token,
1289                                      NULL);
1290         if (GSS_ERROR(maj_stat)) {
1291                 DEBUG(1, ("GSS display_name failed: %s\n",
1292                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1293                 talloc_free(mem_ctx);
1294                 return NT_STATUS_FOOBAR;
1295         }
1296
1297         principal_string = talloc_strndup(mem_ctx,
1298                                           (const char *)name_token.value,
1299                                           name_token.length);
1300
1301         gss_release_buffer(&min_stat, &name_token);
1302
1303         if (!principal_string) {
1304                 talloc_free(mem_ctx);
1305                 return NT_STATUS_NO_MEMORY;
1306         }
1307
1308         maj_stat = gsskrb5_extract_authz_data_from_sec_context(&min_stat,
1309                                                                gensec_gssapi_state->gssapi_context,
1310                                                                KRB5_AUTHDATA_WIN2K_PAC,
1311                                                                &pac);
1312
1313
1314         if (maj_stat == 0) {
1315                 pac_blob = data_blob_talloc(mem_ctx, pac.value, pac.length);
1316                 gss_release_buffer(&min_stat, &pac);
1317
1318         } else {
1319                 pac_blob = data_blob(NULL, 0);
1320         }
1321
1322         /* IF we have the PAC - otherwise we need to get this
1323          * data from elsewere - local ldb, or (TODO) lookup of some
1324          * kind...
1325          */
1326         if (pac_blob.length) {
1327                 krb5_error_code ret;
1328                 union netr_Validation validation;
1329
1330                 maj_stat = gsskrb5_extract_authtime_from_sec_context(&min_stat,
1331                                                                      gensec_gssapi_state->gssapi_context,
1332                                                                      &authtime);
1333
1334                 if (GSS_ERROR(maj_stat)) {
1335                         DEBUG(1, ("gsskrb5_extract_authtime_from_sec_context: %s\n",
1336                                   gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1337                         talloc_free(mem_ctx);
1338                         return NT_STATUS_FOOBAR;
1339                 }
1340
1341                 maj_stat = gsskrb5_extract_service_keyblock(&min_stat,
1342                                                             gensec_gssapi_state->gssapi_context,
1343                                                             &keyblock);
1344
1345                 if (GSS_ERROR(maj_stat)) {
1346                         DEBUG(1, ("gsskrb5_copy_service_keyblock failed: %s\n",
1347                                   gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1348                         talloc_free(mem_ctx);
1349                         return NT_STATUS_FOOBAR;
1350                 }
1351
1352                 ret = krb5_parse_name_flags(gensec_gssapi_state->smb_krb5_context->krb5_context,
1353                                             principal_string,
1354                                             KRB5_PRINCIPAL_PARSE_MUST_REALM,
1355                                             &principal);
1356                 if (ret) {
1357                         krb5_free_keyblock(gensec_gssapi_state->smb_krb5_context->krb5_context,
1358                                            keyblock);
1359                         talloc_free(mem_ctx);
1360                         return NT_STATUS_INVALID_PARAMETER;
1361                 }
1362
1363                 /* decode and verify the pac */
1364                 nt_status = kerberos_pac_logon_info(mem_ctx, lp_iconv_convenience(gensec_security->lp_ctx), &logon_info, pac_blob,
1365                                                     gensec_gssapi_state->smb_krb5_context->krb5_context,
1366                                                     NULL, keyblock, principal, authtime, NULL);
1367                 krb5_free_principal(gensec_gssapi_state->smb_krb5_context->krb5_context, principal);
1368                 krb5_free_keyblock(gensec_gssapi_state->smb_krb5_context->krb5_context,
1369                                    keyblock);
1370
1371                 if (!NT_STATUS_IS_OK(nt_status)) {
1372                         talloc_free(mem_ctx);
1373                         return nt_status;
1374                 }
1375                 validation.sam3 = &logon_info->info3;
1376                 nt_status = make_server_info_netlogon_validation(gensec_gssapi_state,
1377                                                                  NULL,
1378                                                                  3, &validation,
1379                                                                  &server_info);
1380                 if (!NT_STATUS_IS_OK(nt_status)) {
1381                         talloc_free(mem_ctx);
1382                         return nt_status;
1383                 }
1384         } else if (!lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec", "require_pac", false)) {
1385                 DEBUG(1, ("Unable to find PAC, resorting to local user lookup: %s\n",
1386                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1387                 nt_status = sam_get_server_info_principal(mem_ctx, gensec_security->event_ctx, gensec_security->lp_ctx, principal_string,
1388                                                           &server_info);
1389
1390                 if (!NT_STATUS_IS_OK(nt_status)) {
1391                         talloc_free(mem_ctx);
1392                         return nt_status;
1393                 }
1394         } else {
1395                 DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access: %s\n",
1396                           principal_string,
1397                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1398                 return NT_STATUS_ACCESS_DENIED;
1399         }
1400
1401         /* references the server_info into the session_info */
1402         nt_status = auth_generate_session_info(mem_ctx, gensec_security->event_ctx, gensec_security->lp_ctx, server_info, &session_info);
1403         if (!NT_STATUS_IS_OK(nt_status)) {
1404                 talloc_free(mem_ctx);
1405                 return nt_status;
1406         }
1407
1408         nt_status = gensec_gssapi_session_key(gensec_security, &session_info->session_key);
1409         if (!NT_STATUS_IS_OK(nt_status)) {
1410                 talloc_free(mem_ctx);
1411                 return nt_status;
1412         }
1413
1414         if (!(gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG)) {
1415                 DEBUG(10, ("gensec_gssapi: NO delegated credentials supplied by client\n"));
1416         } else {
1417                 krb5_error_code ret;
1418                 DEBUG(10, ("gensec_gssapi: delegated credentials supplied by client\n"));
1419                 session_info->credentials = cli_credentials_init(session_info);
1420                 if (!session_info->credentials) {
1421                         talloc_free(mem_ctx);
1422                         return NT_STATUS_NO_MEMORY;
1423                 }
1424
1425                 cli_credentials_set_conf(session_info->credentials, gensec_security->lp_ctx);
1426                 /* Just so we don't segfault trying to get at a username */
1427                 cli_credentials_set_anonymous(session_info->credentials);
1428
1429                 ret = cli_credentials_set_client_gss_creds(session_info->credentials,
1430                                                            gensec_security->event_ctx,
1431                                                            gensec_security->lp_ctx,
1432                                                            gensec_gssapi_state->delegated_cred_handle,
1433                                                            CRED_SPECIFIED);
1434                 if (ret) {
1435                         talloc_free(mem_ctx);
1436                         return NT_STATUS_NO_MEMORY;
1437                 }
1438
1439                 /* This credential handle isn't useful for password authentication, so ensure nobody tries to do that */
1440                 cli_credentials_set_kerberos_state(session_info->credentials, CRED_MUST_USE_KERBEROS);
1441
1442                 /* It has been taken from this place... */
1443                 gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
1444         }
1445         talloc_steal(gensec_gssapi_state, session_info);
1446         talloc_free(mem_ctx);
1447         *_session_info = session_info;
1448
1449         return NT_STATUS_OK;
1450 }
1451
1452 size_t gensec_gssapi_sig_size(struct gensec_security *gensec_security, size_t data_size)
1453 {
1454         struct gensec_gssapi_state *gensec_gssapi_state
1455                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1456         NTSTATUS status;
1457
1458         if (gensec_gssapi_state->sig_size) {
1459                 return gensec_gssapi_state->sig_size;
1460         }
1461
1462         if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1463                 gensec_gssapi_state->sig_size = 45;
1464         } else {
1465                 gensec_gssapi_state->sig_size = 37;
1466         }
1467
1468         status = gensec_gssapi_init_lucid(gensec_gssapi_state);
1469         if (!NT_STATUS_IS_OK(status)) {
1470                 return gensec_gssapi_state->sig_size;
1471         }
1472
1473         if (gensec_gssapi_state->lucid->protocol == 1) {
1474                 if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1475                         /*
1476                          * TODO: windows uses 76 here, but we don't know
1477                          *       gss_wrap works with aes keys yet
1478                          */
1479                         gensec_gssapi_state->sig_size = 76;
1480                 } else {
1481                         gensec_gssapi_state->sig_size = 28;
1482                 }
1483         } else if (gensec_gssapi_state->lucid->protocol == 0) {
1484                 switch (gensec_gssapi_state->lucid->rfc1964_kd.ctx_key.type) {
1485                 case KEYTYPE_DES:
1486                 case KEYTYPE_ARCFOUR:
1487                 case KEYTYPE_ARCFOUR_56:
1488                         if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1489                                 gensec_gssapi_state->sig_size = 45;
1490                         } else {
1491                                 gensec_gssapi_state->sig_size = 37;
1492                         }
1493                         break;
1494                 case KEYTYPE_DES3:
1495                         if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1496                                 gensec_gssapi_state->sig_size = 57;
1497                         } else {
1498                                 gensec_gssapi_state->sig_size = 49;
1499                         }
1500                         break;
1501                 }
1502         }
1503
1504         return gensec_gssapi_state->sig_size;
1505 }
1506
1507 static const char *gensec_gssapi_krb5_oids[] = {
1508         GENSEC_OID_KERBEROS5_OLD,
1509         GENSEC_OID_KERBEROS5,
1510         NULL
1511 };
1512
1513 static const char *gensec_gssapi_spnego_oids[] = {
1514         GENSEC_OID_SPNEGO,
1515         NULL
1516 };
1517
1518 /* As a server, this could in theory accept any GSSAPI mech */
1519 static const struct gensec_security_ops gensec_gssapi_spnego_security_ops = {
1520         .name           = "gssapi_spnego",
1521         .sasl_name      = "GSS-SPNEGO",
1522         .auth_type      = DCERPC_AUTH_TYPE_SPNEGO,
1523         .oid            = gensec_gssapi_spnego_oids,
1524         .client_start   = gensec_gssapi_client_start,
1525         .server_start   = gensec_gssapi_server_start,
1526         .magic          = gensec_gssapi_magic,
1527         .update         = gensec_gssapi_update,
1528         .session_key    = gensec_gssapi_session_key,
1529         .session_info   = gensec_gssapi_session_info,
1530         .sign_packet    = gensec_gssapi_sign_packet,
1531         .check_packet   = gensec_gssapi_check_packet,
1532         .seal_packet    = gensec_gssapi_seal_packet,
1533         .unseal_packet  = gensec_gssapi_unseal_packet,
1534         .wrap           = gensec_gssapi_wrap,
1535         .unwrap         = gensec_gssapi_unwrap,
1536         .have_feature   = gensec_gssapi_have_feature,
1537         .enabled        = false,
1538         .kerberos       = true,
1539         .priority       = GENSEC_GSSAPI
1540 };
1541
1542 /* As a server, this could in theory accept any GSSAPI mech */
1543 static const struct gensec_security_ops gensec_gssapi_krb5_security_ops = {
1544         .name           = "gssapi_krb5",
1545         .auth_type      = DCERPC_AUTH_TYPE_KRB5,
1546         .oid            = gensec_gssapi_krb5_oids,
1547         .client_start   = gensec_gssapi_client_start,
1548         .server_start   = gensec_gssapi_server_start,
1549         .magic          = gensec_gssapi_magic,
1550         .update         = gensec_gssapi_update,
1551         .session_key    = gensec_gssapi_session_key,
1552         .session_info   = gensec_gssapi_session_info,
1553         .sig_size       = gensec_gssapi_sig_size,
1554         .sign_packet    = gensec_gssapi_sign_packet,
1555         .check_packet   = gensec_gssapi_check_packet,
1556         .seal_packet    = gensec_gssapi_seal_packet,
1557         .unseal_packet  = gensec_gssapi_unseal_packet,
1558         .wrap           = gensec_gssapi_wrap,
1559         .unwrap         = gensec_gssapi_unwrap,
1560         .have_feature   = gensec_gssapi_have_feature,
1561         .enabled        = true,
1562         .kerberos       = true,
1563         .priority       = GENSEC_GSSAPI
1564 };
1565
1566 /* As a server, this could in theory accept any GSSAPI mech */
1567 static const struct gensec_security_ops gensec_gssapi_sasl_krb5_security_ops = {
1568         .name             = "gssapi_krb5_sasl",
1569         .sasl_name        = "GSSAPI",
1570         .client_start     = gensec_gssapi_sasl_client_start,
1571         .server_start     = gensec_gssapi_sasl_server_start,
1572         .update           = gensec_gssapi_update,
1573         .session_key      = gensec_gssapi_session_key,
1574         .session_info     = gensec_gssapi_session_info,
1575         .max_input_size   = gensec_gssapi_max_input_size,
1576         .max_wrapped_size = gensec_gssapi_max_wrapped_size,
1577         .wrap             = gensec_gssapi_wrap,
1578         .unwrap           = gensec_gssapi_unwrap,
1579         .have_feature     = gensec_gssapi_have_feature,
1580         .enabled          = true,
1581         .kerberos         = true,
1582         .priority         = GENSEC_GSSAPI
1583 };
1584
1585 _PUBLIC_ NTSTATUS gensec_gssapi_init(void)
1586 {
1587         NTSTATUS ret;
1588
1589         ret = gensec_register(&gensec_gssapi_spnego_security_ops);
1590         if (!NT_STATUS_IS_OK(ret)) {
1591                 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1592                         gensec_gssapi_spnego_security_ops.name));
1593                 return ret;
1594         }
1595
1596         ret = gensec_register(&gensec_gssapi_krb5_security_ops);
1597         if (!NT_STATUS_IS_OK(ret)) {
1598                 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1599                         gensec_gssapi_krb5_security_ops.name));
1600                 return ret;
1601         }
1602
1603         ret = gensec_register(&gensec_gssapi_sasl_krb5_security_ops);
1604         if (!NT_STATUS_IS_OK(ret)) {
1605                 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1606                         gensec_gssapi_sasl_krb5_security_ops.name));
1607                 return ret;
1608         }
1609
1610         return ret;
1611 }