source4/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 "system/gssapi.h"
  28 #include "auth/kerberos/kerberos.h"
  29 #include "librpc/gen_ndr/krb5pac.h"
  30 #include "auth/auth.h"
  31 #include <ldb.h>
  32 #include "auth/auth_sam.h"
  33 #include "librpc/gen_ndr/dcerpc.h"
  34 #include "auth/credentials/credentials.h"
  35 #include "auth/credentials/credentials_krb5.h"
  36 #include "auth/gensec/gensec.h"
  37 #include "auth/gensec/gensec_internal.h"
  38 #include "auth/gensec/gensec_proto.h"
  39 #include "auth/gensec/gensec_toplevel_proto.h"
  40 #include "param/param.h"
  41 #include "auth/session_proto.h"
  42 #include "gensec_gssapi.h"
  43 #include "lib/util/util_net.h"
  44 #include "auth/kerberos/pac_utils.h"
  45 #include "auth/kerberos/gssapi_helper.h"
  46
  47 #ifndef gss_mech_spnego
  48 gss_OID_desc spnego_mech_oid_desc =
  49                 { 6, discard_const_p(void, "\x2b\x06\x01\x05\x05\x02") };
  50 #define gss_mech_spnego (&spnego_mech_oid_desc)
  51 #endif
  52
  53 _PUBLIC_ NTSTATUS gensec_gssapi_init(void);
  54
  55 static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security);
  56 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security);
  57
  58 static int gensec_gssapi_destructor(struct gensec_gssapi_state *gensec_gssapi_state)
  59 {
  60         OM_uint32 min_stat;
  61
  62         if (gensec_gssapi_state->delegated_cred_handle != GSS_C_NO_CREDENTIAL) {
  63                 gss_release_cred(&min_stat,
  64                                  &gensec_gssapi_state->delegated_cred_handle);
  65         }
  66
  67         if (gensec_gssapi_state->gssapi_context != GSS_C_NO_CONTEXT) {
  68                 gss_delete_sec_context(&min_stat,
  69                                        &gensec_gssapi_state->gssapi_context,
  70                                        GSS_C_NO_BUFFER);
  71         }
  72
  73         if (gensec_gssapi_state->server_name != GSS_C_NO_NAME) {
  74                 gss_release_name(&min_stat,
  75                                  &gensec_gssapi_state->server_name);
  76         }
  77         if (gensec_gssapi_state->client_name != GSS_C_NO_NAME) {
  78                 gss_release_name(&min_stat,
  79                                  &gensec_gssapi_state->client_name);
  80         }
  81
  82         if (gensec_gssapi_state->lucid) {
  83                 gss_krb5_free_lucid_sec_context(&min_stat, gensec_gssapi_state->lucid);
  84         }
  85
  86         return 0;
  87 }
  88
  89 static NTSTATUS gensec_gssapi_init_lucid(struct gensec_gssapi_state *gensec_gssapi_state)
  90 {
  91         OM_uint32 maj_stat, min_stat;
  92
  93         if (gensec_gssapi_state->lucid) {
  94                 return NT_STATUS_OK;
  95         }
  96
  97         maj_stat = gss_krb5_export_lucid_sec_context(&min_stat,
  98                                                      &gensec_gssapi_state->gssapi_context,
  99                                                      1,
 100                                                      (void **)&gensec_gssapi_state->lucid);
 101         if (maj_stat != GSS_S_COMPLETE) {
 102                 DEBUG(0,("gensec_gssapi_init_lucid: %s\n",
 103                         gssapi_error_string(gensec_gssapi_state,
 104                                             maj_stat, min_stat,
 105                                             gensec_gssapi_state->gss_oid)));
 106                 return NT_STATUS_INTERNAL_ERROR;
 107         }
 108
 109         if (gensec_gssapi_state->lucid->version != 1) {
 110                 DEBUG(0,("gensec_gssapi_init_lucid: lucid version[%d] != 1\n",
 111                         gensec_gssapi_state->lucid->version));
 112                 gss_krb5_free_lucid_sec_context(&min_stat, gensec_gssapi_state->lucid);
 113                 gensec_gssapi_state->lucid = NULL;
 114                 return NT_STATUS_INTERNAL_ERROR;
 115         }
 116
 117         return NT_STATUS_OK;
 118 }
 119
 120 static NTSTATUS gensec_gssapi_start(struct gensec_security *gensec_security)
 121 {
 122         struct gensec_gssapi_state *gensec_gssapi_state;
 123         krb5_error_code ret;
 124         const char *realm;
 125
 126         gensec_gssapi_state = talloc_zero(gensec_security, struct gensec_gssapi_state);
 127         if (!gensec_gssapi_state) {
 128                 return NT_STATUS_NO_MEMORY;
 129         }
 130
 131         gensec_security->private_data = gensec_gssapi_state;
 132
 133         gensec_gssapi_state->gssapi_context = GSS_C_NO_CONTEXT;
 134
 135         /* TODO: Fill in channel bindings */
 136         gensec_gssapi_state->input_chan_bindings = GSS_C_NO_CHANNEL_BINDINGS;
 137
 138         gensec_gssapi_state->server_name = GSS_C_NO_NAME;
 139         gensec_gssapi_state->client_name = GSS_C_NO_NAME;
 140
 141         gensec_gssapi_state->gss_want_flags = 0;
 142         gensec_gssapi_state->expire_time = GENSEC_EXPIRE_TIME_INFINITY;
 143
 144         if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "delegation_by_kdc_policy", true)) {
 145                 gensec_gssapi_state->gss_want_flags |= GSS_C_DELEG_POLICY_FLAG;
 146         }
 147         if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "mutual", true)) {
 148                 gensec_gssapi_state->gss_want_flags |= GSS_C_MUTUAL_FLAG;
 149         }
 150         if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "delegation", true)) {
 151                 gensec_gssapi_state->gss_want_flags |= GSS_C_DELEG_FLAG;
 152         }
 153         if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "replay", true)) {
 154                 gensec_gssapi_state->gss_want_flags |= GSS_C_REPLAY_FLAG;
 155         }
 156         if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "sequence", true)) {
 157                 gensec_gssapi_state->gss_want_flags |= GSS_C_SEQUENCE_FLAG;
 158         }
 159
 160         if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
 161                 gensec_gssapi_state->gss_want_flags |= GSS_C_INTEG_FLAG;
 162         }
 163         if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
 164                 gensec_gssapi_state->gss_want_flags |= GSS_C_INTEG_FLAG;
 165                 gensec_gssapi_state->gss_want_flags |= GSS_C_CONF_FLAG;
 166         }
 167         if (gensec_security->want_features & GENSEC_FEATURE_DCE_STYLE) {
 168                 gensec_gssapi_state->gss_want_flags |= GSS_C_DCE_STYLE;
 169         }
 170
 171         gensec_gssapi_state->gss_got_flags = 0;
 172
 173         switch (gensec_security->ops->auth_type) {
 174         case DCERPC_AUTH_TYPE_SPNEGO:
 175                 gensec_gssapi_state->gss_oid = gss_mech_spnego;
 176                 break;
 177         case DCERPC_AUTH_TYPE_KRB5:
 178         default:
 179                 gensec_gssapi_state->gss_oid =
 180                         discard_const_p(void, gss_mech_krb5);
 181                 break;
 182         }
 183
 184         ret = smb_krb5_init_context(gensec_gssapi_state,
 185                                     gensec_security->settings->lp_ctx,
 186                                     &gensec_gssapi_state->smb_krb5_context);
 187         if (ret) {
 188                 DEBUG(1,("gensec_gssapi_start: smb_krb5_init_context failed (%s)\n",
 189                          error_message(ret)));
 190                 talloc_free(gensec_gssapi_state);
 191                 return NT_STATUS_INTERNAL_ERROR;
 192         }
 193
 194         gensec_gssapi_state->client_cred = NULL;
 195         gensec_gssapi_state->server_cred = NULL;
 196
 197         gensec_gssapi_state->lucid = NULL;
 198
 199         gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
 200
 201         gensec_gssapi_state->sasl = false;
 202         gensec_gssapi_state->sasl_state = STAGE_GSS_NEG;
 203         gensec_gssapi_state->sasl_protection = 0;
 204
 205         gensec_gssapi_state->max_wrap_buf_size
 206                 = gensec_setting_int(gensec_security->settings, "gensec_gssapi", "max wrap buf size", 65536);
 207         gensec_gssapi_state->gss_exchange_count = 0;
 208         gensec_gssapi_state->sig_size = 0;
 209
 210         talloc_set_destructor(gensec_gssapi_state, gensec_gssapi_destructor);
 211
 212 #ifdef SAMBA4_USES_HEIMDAL
 213         realm = lpcfg_realm(gensec_security->settings->lp_ctx);
 214         if (realm != NULL) {
 215                 ret = gsskrb5_set_default_realm(realm);
 216                 if (ret) {
 217                         DEBUG(1,("gensec_gssapi_start: gsskrb5_set_default_realm failed\n"));
 218                         talloc_free(gensec_gssapi_state);
 219                         return NT_STATUS_INTERNAL_ERROR;
 220                 }
 221         }
 222
 223         /* don't do DNS lookups of any kind, it might/will fail for a netbios name */
 224         ret = gsskrb5_set_dns_canonicalize(gensec_setting_bool(gensec_security->settings, "krb5", "set_dns_canonicalize", false));
 225         if (ret) {
 226                 DEBUG(1,("gensec_gssapi_start: gsskrb5_set_dns_canonicalize failed\n"));
 227                 talloc_free(gensec_gssapi_state);
 228                 return NT_STATUS_INTERNAL_ERROR;
 229         }
 230 #endif
 231         return NT_STATUS_OK;
 232 }
 233
 234 static NTSTATUS gensec_gssapi_server_start(struct gensec_security *gensec_security)
 235 {
 236         NTSTATUS nt_status;
 237         int ret;
 238         struct gensec_gssapi_state *gensec_gssapi_state;
 239         struct cli_credentials *machine_account;
 240         struct gssapi_creds_container *gcc;
 241
 242         nt_status = gensec_gssapi_start(gensec_security);
 243         if (!NT_STATUS_IS_OK(nt_status)) {
 244                 return nt_status;
 245         }
 246
 247         gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 248
 249         machine_account = gensec_get_credentials(gensec_security);
 250
 251         if (!machine_account) {
 252                 DEBUG(3, ("No machine account credentials specified\n"));
 253                 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 254         } else {
 255                 ret = cli_credentials_get_server_gss_creds(machine_account,
 256                                                            gensec_security->settings->lp_ctx, &gcc);
 257                 if (ret) {
 258                         DEBUG(1, ("Aquiring acceptor credentials failed: %s\n",
 259                                   error_message(ret)));
 260                         return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 261                 }
 262         }
 263
 264         gensec_gssapi_state->server_cred = gcc;
 265         return NT_STATUS_OK;
 266
 267 }
 268
 269 static NTSTATUS gensec_gssapi_sasl_server_start(struct gensec_security *gensec_security)
 270 {
 271         NTSTATUS nt_status;
 272         struct gensec_gssapi_state *gensec_gssapi_state;
 273         nt_status = gensec_gssapi_server_start(gensec_security);
 274
 275         if (NT_STATUS_IS_OK(nt_status)) {
 276                 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 277                 gensec_gssapi_state->sasl = true;
 278         }
 279         return nt_status;
 280 }
 281
 282 static NTSTATUS gensec_gssapi_client_creds(struct gensec_security *gensec_security,
 283                                            struct tevent_context *ev)
 284 {
 285         struct gensec_gssapi_state *gensec_gssapi_state;
 286         struct gssapi_creds_container *gcc;
 287         struct cli_credentials *creds = gensec_get_credentials(gensec_security);
 288         const char *error_string;
 289         int ret;
 290
 291         gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 292
 293         /* Only run this the first time the update() call is made */
 294         if (gensec_gssapi_state->client_cred) {
 295                 return NT_STATUS_OK;
 296         }
 297
 298         ret = cli_credentials_get_client_gss_creds(creds,
 299                                                    ev,
 300                                                    gensec_security->settings->lp_ctx, &gcc, &error_string);
 301         switch (ret) {
 302         case 0:
 303                 break;
 304         case EINVAL:
 305                 DEBUG(3, ("Cannot obtain client GSS credentials we need to contact %s : %s\n", gensec_gssapi_state->target_principal, error_string));
 306                 return NT_STATUS_INVALID_PARAMETER;
 307         case KRB5KDC_ERR_PREAUTH_FAILED:
 308         case KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN:
 309         case KRB5KRB_AP_ERR_BAD_INTEGRITY:
 310                 DEBUG(1, ("Wrong username or password: %s\n", error_string));
 311                 return NT_STATUS_LOGON_FAILURE;
 312         case KRB5KDC_ERR_CLIENT_REVOKED:
 313                 DEBUG(1, ("Account locked out: %s\n", error_string));
 314                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
 315         case KRB5_KDC_UNREACH:
 316                 DEBUG(3, ("Cannot reach a KDC we require to contact %s : %s\n", gensec_gssapi_state->target_principal, error_string));
 317                 return NT_STATUS_NO_LOGON_SERVERS;
 318         case KRB5_CC_NOTFOUND:
 319         case KRB5_CC_END:
 320                 DEBUG(2, ("Error obtaining ticket we require to contact %s: (possibly due to clock skew between us and the KDC) %s\n", gensec_gssapi_state->target_principal, error_string));
 321                 return NT_STATUS_TIME_DIFFERENCE_AT_DC;
 322         default:
 323                 DEBUG(1, ("Aquiring initiator credentials failed: %s\n", error_string));
 324                 return NT_STATUS_UNSUCCESSFUL;
 325         }
 326
 327         gensec_gssapi_state->client_cred = gcc;
 328         if (!talloc_reference(gensec_gssapi_state, gcc)) {
 329                 return NT_STATUS_NO_MEMORY;
 330         }
 331
 332         return NT_STATUS_OK;
 333 }
 334
 335 static NTSTATUS gensec_gssapi_client_start(struct gensec_security *gensec_security)
 336 {
 337         struct gensec_gssapi_state *gensec_gssapi_state;
 338         struct cli_credentials *creds = gensec_get_credentials(gensec_security);
 339         NTSTATUS nt_status;
 340         gss_buffer_desc name_token;
 341         gss_OID name_type;
 342         OM_uint32 maj_stat, min_stat;
 343         const char *hostname = gensec_get_target_hostname(gensec_security);
 344
 345         if (!hostname) {
 346                 DEBUG(3, ("No hostname for target computer passed in, cannot use kerberos for this connection\n"));
 347                 return NT_STATUS_INVALID_PARAMETER;
 348         }
 349         if (is_ipaddress(hostname)) {
 350                 DEBUG(2, ("Cannot do GSSAPI to an IP address\n"));
 351                 return NT_STATUS_INVALID_PARAMETER;
 352         }
 353         if (strcmp(hostname, "localhost") == 0) {
 354                 DEBUG(2, ("GSSAPI to 'localhost' does not make sense\n"));
 355                 return NT_STATUS_INVALID_PARAMETER;
 356         }
 357
 358         nt_status = gensec_gssapi_start(gensec_security);
 359         if (!NT_STATUS_IS_OK(nt_status)) {
 360                 return nt_status;
 361         }
 362
 363         gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 364
 365         if (cli_credentials_get_impersonate_principal(creds)) {
 366                 gensec_gssapi_state->gss_want_flags &= ~(GSS_C_DELEG_FLAG|GSS_C_DELEG_POLICY_FLAG);
 367         }
 368
 369         gensec_gssapi_state->target_principal = gensec_get_target_principal(gensec_security);
 370         if (gensec_gssapi_state->target_principal) {
 371                 name_type = GSS_C_NULL_OID;
 372         } else {
 373                 gensec_gssapi_state->target_principal = talloc_asprintf(gensec_gssapi_state, "%s/%s@%s",
 374                                             gensec_get_target_service(gensec_security),
 375                                             hostname, lpcfg_realm(gensec_security->settings->lp_ctx));
 376
 377                 name_type = GSS_C_NT_USER_NAME;
 378         }
 379         name_token.value  = discard_const_p(uint8_t, gensec_gssapi_state->target_principal);
 380         name_token.length = strlen(gensec_gssapi_state->target_principal);
 381
 382
 383         maj_stat = gss_import_name (&min_stat,
 384                                     &name_token,
 385                                     name_type,
 386                                     &gensec_gssapi_state->server_name);
 387         if (maj_stat) {
 388                 DEBUG(2, ("GSS Import name of %s failed: %s\n",
 389                           (char *)name_token.value,
 390                           gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 391                 return NT_STATUS_INVALID_PARAMETER;
 392         }
 393
 394         return NT_STATUS_OK;
 395 }
 396
 397 static NTSTATUS gensec_gssapi_sasl_client_start(struct gensec_security *gensec_security)
 398 {
 399         NTSTATUS nt_status;
 400         struct gensec_gssapi_state *gensec_gssapi_state;
 401         nt_status = gensec_gssapi_client_start(gensec_security);
 402
 403         if (NT_STATUS_IS_OK(nt_status)) {
 404                 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 405                 gensec_gssapi_state->sasl = true;
 406         }
 407         return nt_status;
 408 }
 409
 410
 411 /**
 412  * Next state function for the GSSAPI GENSEC mechanism
 413  *
 414  * @param gensec_gssapi_state GSSAPI State
 415  * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
 416  * @param in The request, as a DATA_BLOB
 417  * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
 418  * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
 419  *                or NT_STATUS_OK if the user is authenticated.
 420  */
 421
 422 static NTSTATUS gensec_gssapi_update(struct gensec_security *gensec_security,
 423                                      TALLOC_CTX *out_mem_ctx,
 424                                      struct tevent_context *ev,
 425                                      const DATA_BLOB in, DATA_BLOB *out)
 426 {
 427         struct gensec_gssapi_state *gensec_gssapi_state
 428                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 429         NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
 430         OM_uint32 maj_stat, min_stat;
 431         OM_uint32 min_stat2;
 432         gss_buffer_desc input_token = { 0, NULL };
 433         gss_buffer_desc output_token = { 0, NULL };
 434
 435         gss_OID gss_oid_p = NULL;
 436         OM_uint32 time_req = 0;
 437         OM_uint32 time_rec = 0;
 438         struct timeval tv;
 439
 440         time_req = gensec_setting_int(gensec_security->settings,
 441                                       "gensec_gssapi", "requested_life_time",
 442                                       time_req);
 443
 444         input_token.length = in.length;
 445         input_token.value = in.data;
 446
 447         switch (gensec_gssapi_state->sasl_state) {
 448         case STAGE_GSS_NEG:
 449         {
 450                 switch (gensec_security->gensec_role) {
 451                 case GENSEC_CLIENT:
 452                 {
 453 #ifdef SAMBA4_USES_HEIMDAL
 454                         struct gsskrb5_send_to_kdc send_to_kdc;
 455 #endif
 456                         krb5_error_code ret;
 457
 458                         nt_status = gensec_gssapi_client_creds(gensec_security, ev);
 459                         if (!NT_STATUS_IS_OK(nt_status)) {
 460                                 return nt_status;
 461                         }
 462
 463 #ifdef SAMBA4_USES_HEIMDAL
 464                         send_to_kdc.func = smb_krb5_send_and_recv_func;
 465                         send_to_kdc.ptr = ev;
 466
 467                         min_stat = gsskrb5_set_send_to_kdc(&send_to_kdc);
 468                         if (min_stat) {
 469                                 DEBUG(1,("gensec_gssapi_update: gsskrb5_set_send_to_kdc failed\n"));
 470                                 return NT_STATUS_INTERNAL_ERROR;
 471                         }
 472 #endif
 473                         maj_stat = gss_init_sec_context(&min_stat,
 474                                                         gensec_gssapi_state->client_cred->creds,
 475                                                         &gensec_gssapi_state->gssapi_context,
 476                                                         gensec_gssapi_state->server_name,
 477                                                         gensec_gssapi_state->gss_oid,
 478                                                         gensec_gssapi_state->gss_want_flags,
 479                                                         time_req,
 480                                                         gensec_gssapi_state->input_chan_bindings,
 481                                                         &input_token,
 482                                                         &gss_oid_p,
 483                                                         &output_token,
 484                                                         &gensec_gssapi_state->gss_got_flags, /* ret flags */
 485                                                         &time_rec);
 486                         if (gss_oid_p) {
 487                                 gensec_gssapi_state->gss_oid = gss_oid_p;
 488                         }
 489
 490 #ifdef SAMBA4_USES_HEIMDAL
 491                         send_to_kdc.func = smb_krb5_send_and_recv_func;
 492                         send_to_kdc.ptr = NULL;
 493
 494                         ret = gsskrb5_set_send_to_kdc(&send_to_kdc);
 495                         if (ret) {
 496                                 DEBUG(1,("gensec_gssapi_update: gsskrb5_set_send_to_kdc failed\n"));
 497                                 return NT_STATUS_INTERNAL_ERROR;
 498                         }
 499 #endif
 500                         break;
 501                 }
 502                 case GENSEC_SERVER:
 503                 {
 504                         maj_stat = gss_accept_sec_context(&min_stat,
 505                                                           &gensec_gssapi_state->gssapi_context,
 506                                                           gensec_gssapi_state->server_cred->creds,
 507                                                           &input_token,
 508                                                           gensec_gssapi_state->input_chan_bindings,
 509                                                           &gensec_gssapi_state->client_name,
 510                                                           &gss_oid_p,
 511                                                           &output_token,
 512                                                           &gensec_gssapi_state->gss_got_flags,
 513                                                           &time_rec,
 514                                                           &gensec_gssapi_state->delegated_cred_handle);
 515                         if (gss_oid_p) {
 516                                 gensec_gssapi_state->gss_oid = gss_oid_p;
 517                         }
 518                         break;
 519                 }
 520                 default:
 521                         return NT_STATUS_INVALID_PARAMETER;
 522
 523                 }
 524
 525                 gensec_gssapi_state->gss_exchange_count++;
 526
 527                 if (maj_stat == GSS_S_COMPLETE) {
 528                         *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
 529                         gss_release_buffer(&min_stat2, &output_token);
 530
 531                         if (gensec_gssapi_state->gss_got_flags & GSS_C_DELEG_FLAG &&
 532                             gensec_gssapi_state->delegated_cred_handle != GSS_C_NO_CREDENTIAL) {
 533                                 DEBUG(5, ("gensec_gssapi: credentials were delegated\n"));
 534                         } else {
 535                                 DEBUG(5, ("gensec_gssapi: NO credentials were delegated\n"));
 536                         }
 537
 538                         tv = timeval_current_ofs(time_rec, 0);
 539                         gensec_gssapi_state->expire_time = timeval_to_nttime(&tv);
 540
 541                         /* We may have been invoked as SASL, so there
 542                          * is more work to do */
 543                         if (gensec_gssapi_state->sasl) {
 544                                 gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_NEG;
 545                                 return NT_STATUS_MORE_PROCESSING_REQUIRED;
 546                         } else {
 547                                 gensec_gssapi_state->sasl_state = STAGE_DONE;
 548
 549                                 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 550                                         DEBUG(5, ("GSSAPI Connection will be cryptographically sealed\n"));
 551                                 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 552                                         DEBUG(5, ("GSSAPI Connection will be cryptographically signed\n"));
 553                                 } else {
 554                                         DEBUG(5, ("GSSAPI Connection will have no cryptographic protection\n"));
 555                                 }
 556
 557                                 return NT_STATUS_OK;
 558                         }
 559                 } else if (maj_stat == GSS_S_CONTINUE_NEEDED) {
 560                         *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
 561                         gss_release_buffer(&min_stat2, &output_token);
 562
 563                         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 564                 } else if (maj_stat == GSS_S_CONTEXT_EXPIRED) {
 565                         gss_cred_id_t creds = NULL;
 566                         gss_name_t name;
 567                         gss_buffer_desc buffer;
 568                         OM_uint32 lifetime = 0;
 569                         gss_cred_usage_t usage;
 570                         const char *role = NULL;
 571                         DEBUG(0, ("GSS %s Update(krb5)(%d) Update failed, credentials expired during GSSAPI handshake!\n",
 572                                   role,
 573                                   gensec_gssapi_state->gss_exchange_count));
 574
 575
 576                         switch (gensec_security->gensec_role) {
 577                         case GENSEC_CLIENT:
 578                                 creds = gensec_gssapi_state->client_cred->creds;
 579                                 role = "client";
 580                                 break;
 581                         case GENSEC_SERVER:
 582                                 creds = gensec_gssapi_state->server_cred->creds;
 583                                 role = "server";
 584                                 break;
 585                         }
 586
 587                         maj_stat = gss_inquire_cred(&min_stat,
 588                                                     creds,
 589                                                     &name, &lifetime, &usage, NULL);
 590
 591                         if (maj_stat == GSS_S_COMPLETE) {
 592                                 const char *usage_string = NULL;
 593                                 switch (usage) {
 594                                 case GSS_C_BOTH:
 595                                         usage_string = "GSS_C_BOTH";
 596                                         break;
 597                                 case GSS_C_ACCEPT:
 598                                         usage_string = "GSS_C_ACCEPT";
 599                                         break;
 600                                 case GSS_C_INITIATE:
 601                                         usage_string = "GSS_C_INITIATE";
 602                                         break;
 603                                 }
 604                                 maj_stat = gss_display_name(&min_stat, name, &buffer, NULL);
 605                                 if (maj_stat) {
 606                                         buffer.value = NULL;
 607                                         buffer.length = 0;
 608                                 }
 609                                 if (lifetime > 0) {
 610                                         DEBUG(0, ("GSSAPI gss_inquire_cred indicates expiry of %*.*s in %u sec for %s\n",
 611                                                   (int)buffer.length, (int)buffer.length, (char *)buffer.value,
 612                                                   lifetime, usage_string));
 613                                 } else {
 614                                         DEBUG(0, ("GSSAPI gss_inquire_cred indicates %*.*s has already expired for %s\n",
 615                                                   (int)buffer.length, (int)buffer.length, (char *)buffer.value,
 616                                                   usage_string));
 617                                 }
 618                                 gss_release_buffer(&min_stat, &buffer);
 619                                 gss_release_name(&min_stat, &name);
 620                         } else if (maj_stat != GSS_S_COMPLETE) {
 621                                 DEBUG(0, ("inquiry of credential lifefime via GSSAPI gss_inquire_cred failed: %s\n",
 622                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 623                         }
 624                         return NT_STATUS_INVALID_PARAMETER;
 625                 } else if (smb_gss_oid_equal(gensec_gssapi_state->gss_oid,
 626                                              gss_mech_krb5)) {
 627                         switch (min_stat) {
 628                         case KRB5KRB_AP_ERR_TKT_NYV:
 629                                 DEBUG(1, ("Error with ticket to contact %s: possible clock skew between us and the KDC or target server: %s\n",
 630                                           gensec_gssapi_state->target_principal,
 631                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 632                                 return NT_STATUS_TIME_DIFFERENCE_AT_DC; /* Make SPNEGO ignore us, we can't go any further here */
 633                         case KRB5KRB_AP_ERR_TKT_EXPIRED:
 634                                 DEBUG(1, ("Error with ticket to contact %s: ticket is expired, possible clock skew between us and the KDC or target server: %s\n",
 635                                           gensec_gssapi_state->target_principal,
 636                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 637                                 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
 638                         case KRB5_KDC_UNREACH:
 639                                 DEBUG(3, ("Cannot reach a KDC we require in order to obtain a ticket to %s: %s\n",
 640                                           gensec_gssapi_state->target_principal,
 641                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 642                                 return NT_STATUS_NO_LOGON_SERVERS; /* Make SPNEGO ignore us, we can't go any further here */
 643                         case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN:
 644                                 DEBUG(3, ("Server %s is not registered with our KDC: %s\n",
 645                                           gensec_gssapi_state->target_principal,
 646                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 647                                 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
 648                         case KRB5KRB_AP_ERR_MSG_TYPE:
 649                                 /* garbage input, possibly from the auto-mech detection */
 650                                 return NT_STATUS_INVALID_PARAMETER;
 651                         default:
 652                                 DEBUG(1, ("GSS %s Update(krb5)(%d) Update failed: %s\n",
 653                                           gensec_security->gensec_role == GENSEC_CLIENT ? "client" : "server",
 654                                           gensec_gssapi_state->gss_exchange_count,
 655                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 656                                 return NT_STATUS_LOGON_FAILURE;
 657                         }
 658                 } else {
 659                         DEBUG(1, ("GSS %s Update(%d) failed: %s\n",
 660                                   gensec_security->gensec_role == GENSEC_CLIENT ? "client" : "server",
 661                                   gensec_gssapi_state->gss_exchange_count,
 662                                   gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 663                         return NT_STATUS_LOGON_FAILURE;
 664                 }
 665                 break;
 666         }
 667
 668         /* These last two stages are only done if we were invoked as SASL */
 669         case STAGE_SASL_SSF_NEG:
 670         {
 671                 switch (gensec_security->gensec_role) {
 672                 case GENSEC_CLIENT:
 673                 {
 674                         uint8_t maxlength_proposed[4];
 675                         uint8_t maxlength_accepted[4];
 676                         uint8_t security_supported;
 677                         int conf_state;
 678                         gss_qop_t qop_state;
 679                         input_token.length = in.length;
 680                         input_token.value = in.data;
 681
 682                         /* As a client, we have just send a
 683                          * zero-length blob to the server (after the
 684                          * normal GSSAPI exchange), and it has replied
 685                          * with it's SASL negotiation */
 686
 687                         maj_stat = gss_unwrap(&min_stat,
 688                                               gensec_gssapi_state->gssapi_context,
 689                                               &input_token,
 690                                               &output_token,
 691                                               &conf_state,
 692                                               &qop_state);
 693                         if (GSS_ERROR(maj_stat)) {
 694                                 DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
 695                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 696                                 return NT_STATUS_ACCESS_DENIED;
 697                         }
 698
 699                         if (output_token.length < 4) {
 700                                 return NT_STATUS_INVALID_PARAMETER;
 701                         }
 702
 703                         memcpy(maxlength_proposed, output_token.value, 4);
 704                         gss_release_buffer(&min_stat, &output_token);
 705
 706                         /* first byte is the proposed security */
 707                         security_supported = maxlength_proposed[0];
 708                         maxlength_proposed[0] = '\0';
 709
 710                         /* Rest is the proposed max wrap length */
 711                         gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_proposed, 0),
 712                                                                      gensec_gssapi_state->max_wrap_buf_size);
 713                         gensec_gssapi_state->sasl_protection = 0;
 714                         if (security_supported & NEG_SEAL) {
 715                                 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 716                                         gensec_gssapi_state->sasl_protection |= NEG_SEAL;
 717                                 }
 718                         }
 719                         if (security_supported & NEG_SIGN) {
 720                                 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 721                                         gensec_gssapi_state->sasl_protection |= NEG_SIGN;
 722                                 }
 723                         }
 724                         if (security_supported & NEG_NONE) {
 725                                 gensec_gssapi_state->sasl_protection |= NEG_NONE;
 726                         }
 727                         if (gensec_gssapi_state->sasl_protection == 0) {
 728                                 DEBUG(1, ("Remote server does not support unprotected connections\n"));
 729                                 return NT_STATUS_ACCESS_DENIED;
 730                         }
 731
 732                         /* Send back the negotiated max length */
 733
 734                         RSIVAL(maxlength_accepted, 0, gensec_gssapi_state->max_wrap_buf_size);
 735
 736                         maxlength_accepted[0] = gensec_gssapi_state->sasl_protection;
 737
 738                         input_token.value = maxlength_accepted;
 739                         input_token.length = sizeof(maxlength_accepted);
 740
 741                         maj_stat = gss_wrap(&min_stat,
 742                                             gensec_gssapi_state->gssapi_context,
 743                                             false,
 744                                             GSS_C_QOP_DEFAULT,
 745                                             &input_token,
 746                                             &conf_state,
 747                                             &output_token);
 748                         if (GSS_ERROR(maj_stat)) {
 749                                 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
 750                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 751                                 return NT_STATUS_ACCESS_DENIED;
 752                         }
 753
 754                         *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
 755                         gss_release_buffer(&min_stat, &output_token);
 756
 757                         /* quirk:  This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
 758                         gensec_gssapi_state->sasl_state = STAGE_DONE;
 759
 760                         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 761                                 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographically sealed\n"));
 762                         } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 763                                 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographically signed\n"));
 764                         } else {
 765                                 DEBUG(3, ("SASL/GSSAPI Connection to server will have no cryptographically protection\n"));
 766                         }
 767
 768                         return NT_STATUS_OK;
 769                 }
 770                 case GENSEC_SERVER:
 771                 {
 772                         uint8_t maxlength_proposed[4];
 773                         uint8_t security_supported = 0x0;
 774                         int conf_state;
 775
 776                         /* As a server, we have just been sent a zero-length blob (note this, but it isn't fatal) */
 777                         if (in.length != 0) {
 778                                 DEBUG(1, ("SASL/GSSAPI: client sent non-zero length starting SASL negotiation!\n"));
 779                         }
 780
 781                         /* Give the client some idea what we will support */
 782
 783                         RSIVAL(maxlength_proposed, 0, gensec_gssapi_state->max_wrap_buf_size);
 784                         /* first byte is the proposed security */
 785                         maxlength_proposed[0] = '\0';
 786
 787                         gensec_gssapi_state->sasl_protection = 0;
 788                         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 789                                 security_supported |= NEG_SEAL;
 790                         }
 791                         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 792                                 security_supported |= NEG_SIGN;
 793                         }
 794                         if (security_supported == 0) {
 795                                 /* If we don't support anything, this must be 0 */
 796                                 RSIVAL(maxlength_proposed, 0, 0x0);
 797                         }
 798
 799                         /* TODO:  We may not wish to support this */
 800                         security_supported |= NEG_NONE;
 801                         maxlength_proposed[0] = security_supported;
 802
 803                         input_token.value = maxlength_proposed;
 804                         input_token.length = sizeof(maxlength_proposed);
 805
 806                         maj_stat = gss_wrap(&min_stat,
 807                                             gensec_gssapi_state->gssapi_context,
 808                                             false,
 809                                             GSS_C_QOP_DEFAULT,
 810                                             &input_token,
 811                                             &conf_state,
 812                                             &output_token);
 813                         if (GSS_ERROR(maj_stat)) {
 814                                 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
 815                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 816                                 return NT_STATUS_ACCESS_DENIED;
 817                         }
 818
 819                         *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
 820                         gss_release_buffer(&min_stat, &output_token);
 821
 822                         gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_ACCEPT;
 823                         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 824                 }
 825                 default:
 826                         return NT_STATUS_INVALID_PARAMETER;
 827
 828                 }
 829         }
 830         /* This is s server-only stage */
 831         case STAGE_SASL_SSF_ACCEPT:
 832         {
 833                 uint8_t maxlength_accepted[4];
 834                 uint8_t security_accepted;
 835                 int conf_state;
 836                 gss_qop_t qop_state;
 837                 input_token.length = in.length;
 838                 input_token.value = in.data;
 839
 840                 maj_stat = gss_unwrap(&min_stat,
 841                                       gensec_gssapi_state->gssapi_context,
 842                                       &input_token,
 843                                       &output_token,
 844                                       &conf_state,
 845                                       &qop_state);
 846                 if (GSS_ERROR(maj_stat)) {
 847                         DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
 848                                   gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 849                         return NT_STATUS_ACCESS_DENIED;
 850                 }
 851
 852                 if (output_token.length < 4) {
 853                         return NT_STATUS_INVALID_PARAMETER;
 854                 }
 855
 856                 memcpy(maxlength_accepted, output_token.value, 4);
 857                 gss_release_buffer(&min_stat, &output_token);
 858
 859                 /* first byte is the proposed security */
 860                 security_accepted = maxlength_accepted[0];
 861                 maxlength_accepted[0] = '\0';
 862
 863                 /* Rest is the proposed max wrap length */
 864                 gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_accepted, 0),
 865                                                              gensec_gssapi_state->max_wrap_buf_size);
 866
 867                 gensec_gssapi_state->sasl_protection = 0;
 868                 if (security_accepted & NEG_SEAL) {
 869                         if (!gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 870                                 DEBUG(1, ("Remote client wanted seal, but gensec refused\n"));
 871                                 return NT_STATUS_ACCESS_DENIED;
 872                         }
 873                         gensec_gssapi_state->sasl_protection |= NEG_SEAL;
 874                 }
 875                 if (security_accepted & NEG_SIGN) {
 876                         if (!gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 877                                 DEBUG(1, ("Remote client wanted sign, but gensec refused\n"));
 878                                 return NT_STATUS_ACCESS_DENIED;
 879                         }
 880                         gensec_gssapi_state->sasl_protection |= NEG_SIGN;
 881                 }
 882                 if (security_accepted & NEG_NONE) {
 883                         gensec_gssapi_state->sasl_protection |= NEG_NONE;
 884                 }
 885
 886                 /* quirk:  This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
 887                 gensec_gssapi_state->sasl_state = STAGE_DONE;
 888                 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 889                         DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographically sealed\n"));
 890                 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 891                         DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographically signed\n"));
 892                 } else {
 893                         DEBUG(5, ("SASL/GSSAPI Connection from client will have no cryptographic protection\n"));
 894                 }
 895
 896                 *out = data_blob(NULL, 0);
 897                 return NT_STATUS_OK;
 898         }
 899         default:
 900                 return NT_STATUS_INVALID_PARAMETER;
 901         }
 902 }
 903
 904 static NTSTATUS gensec_gssapi_wrap(struct gensec_security *gensec_security,
 905                                    TALLOC_CTX *mem_ctx,
 906                                    const DATA_BLOB *in,
 907                                    DATA_BLOB *out)
 908 {
 909         struct gensec_gssapi_state *gensec_gssapi_state
 910                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 911         OM_uint32 maj_stat, min_stat;
 912         gss_buffer_desc input_token, output_token;
 913         int conf_state;
 914         input_token.length = in->length;
 915         input_token.value = in->data;
 916
 917         maj_stat = gss_wrap(&min_stat,
 918                             gensec_gssapi_state->gssapi_context,
 919                             gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
 920                             GSS_C_QOP_DEFAULT,
 921                             &input_token,
 922                             &conf_state,
 923                             &output_token);
 924         if (GSS_ERROR(maj_stat)) {
 925                 DEBUG(1, ("gensec_gssapi_wrap: GSS Wrap failed: %s\n",
 926                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 927                 return NT_STATUS_ACCESS_DENIED;
 928         }
 929
 930         *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
 931         gss_release_buffer(&min_stat, &output_token);
 932
 933         if (gensec_gssapi_state->sasl) {
 934                 size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
 935                 if (max_wrapped_size < out->length) {
 936                         DEBUG(1, ("gensec_gssapi_wrap: when wrapped, INPUT data (%u) is grew to be larger than SASL negotiated maximum output size (%u > %u)\n",
 937                                   (unsigned)in->length,
 938                                   (unsigned)out->length,
 939                                   (unsigned int)max_wrapped_size));
 940                         return NT_STATUS_INVALID_PARAMETER;
 941                 }
 942         }
 943
 944         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
 945             && !conf_state) {
 946                 return NT_STATUS_ACCESS_DENIED;
 947         }
 948         return NT_STATUS_OK;
 949 }
 950
 951 static NTSTATUS gensec_gssapi_unwrap(struct gensec_security *gensec_security,
 952                                      TALLOC_CTX *mem_ctx,
 953                                      const DATA_BLOB *in,
 954                                      DATA_BLOB *out)
 955 {
 956         struct gensec_gssapi_state *gensec_gssapi_state
 957                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 958         OM_uint32 maj_stat, min_stat;
 959         gss_buffer_desc input_token, output_token;
 960         int conf_state;
 961         gss_qop_t qop_state;
 962         input_token.length = in->length;
 963         input_token.value = in->data;
 964
 965         if (gensec_gssapi_state->sasl) {
 966                 size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
 967                 if (max_wrapped_size < in->length) {
 968                         DEBUG(1, ("gensec_gssapi_unwrap: WRAPPED data is larger than SASL negotiated maximum size\n"));
 969                         return NT_STATUS_INVALID_PARAMETER;
 970                 }
 971         }
 972
 973         maj_stat = gss_unwrap(&min_stat,
 974                               gensec_gssapi_state->gssapi_context,
 975                               &input_token,
 976                               &output_token,
 977                               &conf_state,
 978                               &qop_state);
 979         if (GSS_ERROR(maj_stat)) {
 980                 DEBUG(1, ("gensec_gssapi_unwrap: GSS UnWrap failed: %s\n",
 981                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 982                 return NT_STATUS_ACCESS_DENIED;
 983         }
 984
 985         *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
 986         gss_release_buffer(&min_stat, &output_token);
 987
 988         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
 989             && !conf_state) {
 990                 return NT_STATUS_ACCESS_DENIED;
 991         }
 992         return NT_STATUS_OK;
 993 }
 994
 995 /* Find out the maximum input size negotiated on this connection */
 996
 997 static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security)
 998 {
 999         struct gensec_gssapi_state *gensec_gssapi_state
1000                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1001         OM_uint32 maj_stat, min_stat;
1002         OM_uint32 max_input_size;
1003
1004         maj_stat = gss_wrap_size_limit(&min_stat,
1005                                        gensec_gssapi_state->gssapi_context,
1006                                        gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
1007                                        GSS_C_QOP_DEFAULT,
1008                                        gensec_gssapi_state->max_wrap_buf_size,
1009                                        &max_input_size);
1010         if (GSS_ERROR(maj_stat)) {
1011                 TALLOC_CTX *mem_ctx = talloc_new(NULL);
1012                 DEBUG(1, ("gensec_gssapi_max_input_size: determining signature size with gss_wrap_size_limit failed: %s\n",
1013                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1014                 talloc_free(mem_ctx);
1015                 return 0;
1016         }
1017
1018         return max_input_size;
1019 }
1020
1021 /* Find out the maximum output size negotiated on this connection */
1022 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security)
1023 {
1024         struct gensec_gssapi_state *gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);;
1025         return gensec_gssapi_state->max_wrap_buf_size;
1026 }
1027
1028 static NTSTATUS gensec_gssapi_seal_packet(struct gensec_security *gensec_security,
1029                                           TALLOC_CTX *mem_ctx,
1030                                           uint8_t *data, size_t length,
1031                                           const uint8_t *whole_pdu, size_t pdu_length,
1032                                           DATA_BLOB *sig)
1033 {
1034         struct gensec_gssapi_state *gensec_gssapi_state
1035                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1036         OM_uint32 maj_stat, min_stat;
1037         gss_buffer_desc input_token, output_token;
1038         int conf_state;
1039         ssize_t sig_length;
1040
1041         if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1042                 DEBUG(1, ("gensec_gssapi_seal_packet: "
1043                           "GENSEC_FEATURE_SIGN_PKT_HEADER not supported\n"));
1044                 return NT_STATUS_ACCESS_DENIED;
1045         }
1046
1047         input_token.length = length;
1048         input_token.value = data;
1049
1050         maj_stat = gss_wrap(&min_stat,
1051                             gensec_gssapi_state->gssapi_context,
1052                             gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
1053                             GSS_C_QOP_DEFAULT,
1054                             &input_token,
1055                             &conf_state,
1056                             &output_token);
1057         if (GSS_ERROR(maj_stat)) {
1058                 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap failed: %s\n",
1059                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1060                 return NT_STATUS_ACCESS_DENIED;
1061         }
1062
1063         if (output_token.length < input_token.length) {
1064                 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap length [%ld] *less* than caller length [%ld]\n",
1065                           (long)output_token.length, (long)length));
1066                 return NT_STATUS_INTERNAL_ERROR;
1067         }
1068         sig_length = output_token.length - input_token.length;
1069
1070         memcpy(data, ((uint8_t *)output_token.value) + sig_length, length);
1071         *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);
1072
1073         dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1074         dump_data_pw("gensec_gssapi_seal_packet: clear\n", data, length);
1075         dump_data_pw("gensec_gssapi_seal_packet: sealed\n", ((uint8_t *)output_token.value) + sig_length, output_token.length - sig_length);
1076
1077         gss_release_buffer(&min_stat, &output_token);
1078
1079         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
1080             && !conf_state) {
1081                 return NT_STATUS_ACCESS_DENIED;
1082         }
1083         return NT_STATUS_OK;
1084 }
1085
1086 static NTSTATUS gensec_gssapi_unseal_packet(struct gensec_security *gensec_security,
1087                                             uint8_t *data, size_t length,
1088                                             const uint8_t *whole_pdu, size_t pdu_length,
1089                                             const DATA_BLOB *sig)
1090 {
1091         struct gensec_gssapi_state *gensec_gssapi_state
1092                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1093         OM_uint32 maj_stat, min_stat;
1094         gss_buffer_desc input_token, output_token;
1095         int conf_state;
1096         gss_qop_t qop_state;
1097         DATA_BLOB in;
1098
1099         dump_data_pw("gensec_gssapi_unseal_packet: sig\n", sig->data, sig->length);
1100
1101         if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1102                 DEBUG(1, ("gensec_gssapi_unseal_packet: "
1103                           "GENSEC_FEATURE_SIGN_PKT_HEADER not supported\n"));
1104                 return NT_STATUS_ACCESS_DENIED;
1105         }
1106
1107         in = data_blob_talloc(gensec_security, NULL, sig->length + length);
1108
1109         memcpy(in.data, sig->data, sig->length);
1110         memcpy(in.data + sig->length, data, length);
1111
1112         input_token.length = in.length;
1113         input_token.value = in.data;
1114
1115         maj_stat = gss_unwrap(&min_stat,
1116                               gensec_gssapi_state->gssapi_context,
1117                               &input_token,
1118                               &output_token,
1119                               &conf_state,
1120                               &qop_state);
1121         talloc_free(in.data);
1122         if (GSS_ERROR(maj_stat)) {
1123                 char *error_string = gssapi_error_string(NULL, maj_stat, min_stat, gensec_gssapi_state->gss_oid);
1124                 DEBUG(1, ("gensec_gssapi_unseal_packet: GSS UnWrap failed: %s\n",
1125                           error_string));
1126                 talloc_free(error_string);
1127                 return NT_STATUS_ACCESS_DENIED;
1128         }
1129
1130         if (output_token.length != length) {
1131                 return NT_STATUS_INTERNAL_ERROR;
1132         }
1133
1134         memcpy(data, output_token.value, length);
1135
1136         gss_release_buffer(&min_stat, &output_token);
1137
1138         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
1139             && !conf_state) {
1140                 return NT_STATUS_ACCESS_DENIED;
1141         }
1142         return NT_STATUS_OK;
1143 }
1144
1145 static NTSTATUS gensec_gssapi_sign_packet(struct gensec_security *gensec_security,
1146                                           TALLOC_CTX *mem_ctx,
1147                                           const uint8_t *data, size_t length,
1148                                           const uint8_t *whole_pdu, size_t pdu_length,
1149                                           DATA_BLOB *sig)
1150 {
1151         struct gensec_gssapi_state *gensec_gssapi_state
1152                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1153         OM_uint32 maj_stat, min_stat;
1154         gss_buffer_desc input_token, output_token;
1155
1156         if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1157                 input_token.length = pdu_length;
1158                 input_token.value = discard_const_p(uint8_t *, whole_pdu);
1159         } else {
1160                 input_token.length = length;
1161                 input_token.value = discard_const_p(uint8_t *, data);
1162         }
1163
1164         maj_stat = gss_get_mic(&min_stat,
1165                             gensec_gssapi_state->gssapi_context,
1166                             GSS_C_QOP_DEFAULT,
1167                             &input_token,
1168                             &output_token);
1169         if (GSS_ERROR(maj_stat)) {
1170                 DEBUG(1, ("GSS GetMic failed: %s\n",
1171                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1172                 return NT_STATUS_ACCESS_DENIED;
1173         }
1174
1175         *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, output_token.length);
1176
1177         dump_data_pw("gensec_gssapi_sign_packet: sig\n", sig->data, sig->length);
1178
1179         gss_release_buffer(&min_stat, &output_token);
1180
1181         return NT_STATUS_OK;
1182 }
1183
1184 static NTSTATUS gensec_gssapi_check_packet(struct gensec_security *gensec_security,
1185                                            const uint8_t *data, size_t length,
1186                                            const uint8_t *whole_pdu, size_t pdu_length,
1187                                            const DATA_BLOB *sig)
1188 {
1189         struct gensec_gssapi_state *gensec_gssapi_state
1190                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1191         OM_uint32 maj_stat, min_stat;
1192         gss_buffer_desc input_token;
1193         gss_buffer_desc input_message;
1194         gss_qop_t qop_state;
1195
1196         dump_data_pw("gensec_gssapi_check_packet: sig\n", sig->data, sig->length);
1197
1198         if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1199                 input_message.length = pdu_length;
1200                 input_message.value = discard_const(whole_pdu);
1201         } else {
1202                 input_message.length = length;
1203                 input_message.value = discard_const(data);
1204         }
1205
1206         input_token.length = sig->length;
1207         input_token.value = sig->data;
1208
1209         maj_stat = gss_verify_mic(&min_stat,
1210                               gensec_gssapi_state->gssapi_context,
1211                               &input_message,
1212                               &input_token,
1213                               &qop_state);
1214         if (GSS_ERROR(maj_stat)) {
1215                 char *error_string = gssapi_error_string(NULL, maj_stat, min_stat, gensec_gssapi_state->gss_oid);
1216                 DEBUG(1, ("GSS VerifyMic failed: %s\n", error_string));
1217                 talloc_free(error_string);
1218
1219                 return NT_STATUS_ACCESS_DENIED;
1220         }
1221
1222         return NT_STATUS_OK;
1223 }
1224
1225 /* Try to figure out what features we actually got on the connection */
1226 static bool gensec_gssapi_have_feature(struct gensec_security *gensec_security,
1227                                        uint32_t feature)
1228 {
1229         struct gensec_gssapi_state *gensec_gssapi_state
1230                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1231         if (feature & GENSEC_FEATURE_SIGN) {
1232                 /* If we are going GSSAPI SASL, then we honour the second negotiation */
1233                 if (gensec_gssapi_state->sasl
1234                     && gensec_gssapi_state->sasl_state == STAGE_DONE) {
1235                         return ((gensec_gssapi_state->sasl_protection & NEG_SIGN)
1236                                 && (gensec_gssapi_state->gss_got_flags & GSS_C_INTEG_FLAG));
1237                 }
1238                 return gensec_gssapi_state->gss_got_flags & GSS_C_INTEG_FLAG;
1239         }
1240         if (feature & GENSEC_FEATURE_SEAL) {
1241                 /* If we are going GSSAPI SASL, then we honour the second negotiation */
1242                 if (gensec_gssapi_state->sasl
1243                     && gensec_gssapi_state->sasl_state == STAGE_DONE) {
1244                         return ((gensec_gssapi_state->sasl_protection & NEG_SEAL)
1245                                  && (gensec_gssapi_state->gss_got_flags & GSS_C_CONF_FLAG));
1246                 }
1247                 return gensec_gssapi_state->gss_got_flags & GSS_C_CONF_FLAG;
1248         }
1249         if (feature & GENSEC_FEATURE_SESSION_KEY) {
1250                 /* Only for GSSAPI/Krb5 */
1251                 if (smb_gss_oid_equal(gensec_gssapi_state->gss_oid,
1252                                       gss_mech_krb5)) {
1253                         return true;
1254                 }
1255         }
1256         if (feature & GENSEC_FEATURE_DCE_STYLE) {
1257                 return gensec_gssapi_state->gss_got_flags & GSS_C_DCE_STYLE;
1258         }
1259         if (feature & GENSEC_FEATURE_NEW_SPNEGO) {
1260                 NTSTATUS status;
1261                 uint32_t keytype;
1262
1263                 if (!(gensec_gssapi_state->gss_got_flags & GSS_C_INTEG_FLAG)) {
1264                         return false;
1265                 }
1266
1267                 if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "force_new_spnego", false)) {
1268                         return true;
1269                 }
1270                 if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "disable_new_spnego", false)) {
1271                         return false;
1272                 }
1273
1274                 status = gssapi_get_session_key(gensec_gssapi_state,
1275                                                 gensec_gssapi_state->gssapi_context, NULL, &keytype);
1276                 /*
1277                  * We should do a proper sig on the mechListMic unless
1278                  * we know we have to be backwards compatible with
1279                  * earlier windows versions.
1280                  *
1281                  * Negotiating a non-krb5
1282                  * mech for example should be regarded as having
1283                  * NEW_SPNEGO
1284                  */
1285                 if (NT_STATUS_IS_OK(status)) {
1286                         switch (keytype) {
1287                         case ENCTYPE_DES_CBC_CRC:
1288                         case ENCTYPE_DES_CBC_MD5:
1289                         case ENCTYPE_ARCFOUR_HMAC:
1290                         case ENCTYPE_DES3_CBC_SHA1:
1291                                 return false;
1292                         }
1293                 }
1294                 return true;
1295         }
1296         /* We can always do async (rather than strict request/reply) packets.  */
1297         if (feature & GENSEC_FEATURE_ASYNC_REPLIES) {
1298                 return true;
1299         }
1300         if (feature & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1301                 if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
1302                         /* TODO: implement this using gss_wrap_iov() */
1303                         return false;
1304                 }
1305
1306                 if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
1307                         return true;
1308                 }
1309
1310                 return false;
1311         }
1312         return false;
1313 }
1314
1315 static NTTIME gensec_gssapi_expire_time(struct gensec_security *gensec_security)
1316 {
1317         struct gensec_gssapi_state *gensec_gssapi_state =
1318                 talloc_get_type_abort(gensec_security->private_data,
1319                 struct gensec_gssapi_state);
1320
1321         return gensec_gssapi_state->expire_time;
1322 }
1323
1324 /*
1325  * Extract the 'sesssion key' needed by SMB signing and ncacn_np
1326  * (for encrypting some passwords).
1327  *
1328  * This breaks all the abstractions, but what do you expect...
1329  */
1330 static NTSTATUS gensec_gssapi_session_key(struct gensec_security *gensec_security,
1331                                           TALLOC_CTX *mem_ctx,
1332                                           DATA_BLOB *session_key)
1333 {
1334         struct gensec_gssapi_state *gensec_gssapi_state
1335                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1336         return gssapi_get_session_key(mem_ctx, gensec_gssapi_state->gssapi_context, session_key, NULL);
1337 }
1338
1339 /* Get some basic (and authorization) information about the user on
1340  * this session.  This uses either the PAC (if present) or a local
1341  * database lookup */
1342 static NTSTATUS gensec_gssapi_session_info(struct gensec_security *gensec_security,
1343                                            TALLOC_CTX *mem_ctx,
1344                                            struct auth_session_info **_session_info)
1345 {
1346         NTSTATUS nt_status;
1347         TALLOC_CTX *tmp_ctx;
1348         struct gensec_gssapi_state *gensec_gssapi_state
1349                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1350         struct auth_session_info *session_info = NULL;
1351         OM_uint32 maj_stat, min_stat;
1352         DATA_BLOB pac_blob, *pac_blob_ptr = NULL;
1353
1354         gss_buffer_desc name_token;
1355         char *principal_string;
1356
1357         tmp_ctx = talloc_named(mem_ctx, 0, "gensec_gssapi_session_info context");
1358         NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
1359
1360         maj_stat = gss_display_name (&min_stat,
1361                                      gensec_gssapi_state->client_name,
1362                                      &name_token,
1363                                      NULL);
1364         if (GSS_ERROR(maj_stat)) {
1365                 DEBUG(1, ("GSS display_name failed: %s\n",
1366                           gssapi_error_string(tmp_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1367                 talloc_free(tmp_ctx);
1368                 return NT_STATUS_FOOBAR;
1369         }
1370
1371         principal_string = talloc_strndup(tmp_ctx,
1372                                           (const char *)name_token.value,
1373                                           name_token.length);
1374
1375         gss_release_buffer(&min_stat, &name_token);
1376
1377         if (!principal_string) {
1378                 talloc_free(tmp_ctx);
1379                 return NT_STATUS_NO_MEMORY;
1380         }
1381
1382         nt_status = gssapi_obtain_pac_blob(tmp_ctx,  gensec_gssapi_state->gssapi_context,
1383                                            gensec_gssapi_state->client_name,
1384                                            &pac_blob);
1385
1386         /* IF we have the PAC - otherwise we need to get this
1387          * data from elsewere - local ldb, or (TODO) lookup of some
1388          * kind...
1389          */
1390         if (NT_STATUS_IS_OK(nt_status)) {
1391                 pac_blob_ptr = &pac_blob;
1392         }
1393         nt_status = gensec_generate_session_info_pac(tmp_ctx,
1394                                                      gensec_security,
1395                                                      gensec_gssapi_state->smb_krb5_context,
1396                                                      pac_blob_ptr, principal_string,
1397                                                      gensec_get_remote_address(gensec_security),
1398                                                      &session_info);
1399         if (!NT_STATUS_IS_OK(nt_status)) {
1400                 talloc_free(tmp_ctx);
1401                 return nt_status;
1402         }
1403
1404         nt_status = gensec_gssapi_session_key(gensec_security, session_info, &session_info->session_key);
1405         if (!NT_STATUS_IS_OK(nt_status)) {
1406                 talloc_free(tmp_ctx);
1407                 return nt_status;
1408         }
1409
1410         if (gensec_gssapi_state->gss_got_flags & GSS_C_DELEG_FLAG &&
1411             gensec_gssapi_state->delegated_cred_handle != GSS_C_NO_CREDENTIAL) {
1412                 krb5_error_code ret;
1413                 const char *error_string;
1414
1415                 DEBUG(10, ("gensec_gssapi: delegated credentials supplied by client\n"));
1416                 session_info->credentials = cli_credentials_init(session_info);
1417                 if (!session_info->credentials) {
1418                         talloc_free(tmp_ctx);
1419                         return NT_STATUS_NO_MEMORY;
1420                 }
1421
1422                 cli_credentials_set_conf(session_info->credentials, gensec_security->settings->lp_ctx);
1423                 /* Just so we don't segfault trying to get at a username */
1424                 cli_credentials_set_anonymous(session_info->credentials);
1425
1426                 ret = cli_credentials_set_client_gss_creds(session_info->credentials,
1427                                                            gensec_security->settings->lp_ctx,
1428                                                            gensec_gssapi_state->delegated_cred_handle,
1429                                                            CRED_SPECIFIED, &error_string);
1430                 if (ret) {
1431                         talloc_free(tmp_ctx);
1432                         DEBUG(2,("Failed to get gss creds: %s\n", error_string));
1433                         return NT_STATUS_NO_MEMORY;
1434                 }
1435
1436                 /* This credential handle isn't useful for password authentication, so ensure nobody tries to do that */
1437                 cli_credentials_set_kerberos_state(session_info->credentials, CRED_MUST_USE_KERBEROS);
1438
1439                 /* It has been taken from this place... */
1440                 gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
1441         } else {
1442                 DEBUG(10, ("gensec_gssapi: NO delegated credentials supplied by client\n"));
1443         }
1444
1445         *_session_info = talloc_steal(mem_ctx, session_info);
1446         talloc_free(tmp_ctx);
1447
1448         return NT_STATUS_OK;
1449 }
1450
1451 static size_t gensec_gssapi_sig_size(struct gensec_security *gensec_security, size_t data_size)
1452 {
1453         struct gensec_gssapi_state *gensec_gssapi_state
1454                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1455         NTSTATUS status;
1456
1457         if (gensec_gssapi_state->sig_size) {
1458                 return gensec_gssapi_state->sig_size;
1459         }
1460
1461         if (gensec_gssapi_state->gss_got_flags & GSS_C_CONF_FLAG) {
1462                 gensec_gssapi_state->sig_size = 45;
1463         } else {
1464                 gensec_gssapi_state->sig_size = 37;
1465         }
1466
1467         status = gensec_gssapi_init_lucid(gensec_gssapi_state);
1468         if (!NT_STATUS_IS_OK(status)) {
1469                 return gensec_gssapi_state->sig_size;
1470         }
1471
1472         if (gensec_gssapi_state->lucid->protocol == 1) {
1473                 if (gensec_gssapi_state->gss_got_flags & GSS_C_CONF_FLAG) {
1474                         gensec_gssapi_state->sig_size = 60;
1475                         if (gensec_gssapi_state->gss_got_flags & GSS_C_DCE_STYLE) {
1476                                 gensec_gssapi_state->sig_size += 16;
1477                         }
1478                 } else {
1479                         gensec_gssapi_state->sig_size = 28;
1480                 }
1481         } else if (gensec_gssapi_state->lucid->protocol == 0) {
1482                 switch (gensec_gssapi_state->lucid->rfc1964_kd.ctx_key.type) {
1483                 case ENCTYPE_DES_CBC_CRC:
1484                 case ENCTYPE_ARCFOUR_HMAC:
1485                 case ENCTYPE_ARCFOUR_HMAC_EXP:
1486                         if (gensec_gssapi_state->gss_got_flags & GSS_C_CONF_FLAG) {
1487                                 gensec_gssapi_state->sig_size = 45;
1488                         } else {
1489                                 gensec_gssapi_state->sig_size = 37;
1490                         }
1491                         break;
1492 #ifdef SAMBA4_USES_HEIMDAL
1493                 case ENCTYPE_OLD_DES3_CBC_SHA1:
1494                         if (gensec_gssapi_state->gss_got_flags & GSS_C_CONF_FLAG) {
1495                                 gensec_gssapi_state->sig_size = 57;
1496                         } else {
1497                                 gensec_gssapi_state->sig_size = 49;
1498                         }
1499                         break;
1500 #endif
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_magic_check_krb5_oid,
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         .max_input_size   = gensec_gssapi_max_input_size,
1535         .max_wrapped_size = gensec_gssapi_max_wrapped_size,
1536         .wrap           = gensec_gssapi_wrap,
1537         .unwrap         = gensec_gssapi_unwrap,
1538         .have_feature   = gensec_gssapi_have_feature,
1539         .expire_time    = gensec_gssapi_expire_time,
1540         .enabled        = false,
1541         .kerberos       = true,
1542         .priority       = GENSEC_GSSAPI
1543 };
1544
1545 /* As a server, this could in theory accept any GSSAPI mech */
1546 static const struct gensec_security_ops gensec_gssapi_krb5_security_ops = {
1547         .name           = "gssapi_krb5",
1548         .auth_type      = DCERPC_AUTH_TYPE_KRB5,
1549         .oid            = gensec_gssapi_krb5_oids,
1550         .client_start   = gensec_gssapi_client_start,
1551         .server_start   = gensec_gssapi_server_start,
1552         .magic          = gensec_magic_check_krb5_oid,
1553         .update         = gensec_gssapi_update,
1554         .session_key    = gensec_gssapi_session_key,
1555         .session_info   = gensec_gssapi_session_info,
1556         .sig_size       = gensec_gssapi_sig_size,
1557         .sign_packet    = gensec_gssapi_sign_packet,
1558         .check_packet   = gensec_gssapi_check_packet,
1559         .seal_packet    = gensec_gssapi_seal_packet,
1560         .unseal_packet  = gensec_gssapi_unseal_packet,
1561         .max_input_size   = gensec_gssapi_max_input_size,
1562         .max_wrapped_size = gensec_gssapi_max_wrapped_size,
1563         .wrap           = gensec_gssapi_wrap,
1564         .unwrap         = gensec_gssapi_unwrap,
1565         .have_feature   = gensec_gssapi_have_feature,
1566         .expire_time    = gensec_gssapi_expire_time,
1567         .enabled        = true,
1568         .kerberos       = true,
1569         .priority       = GENSEC_GSSAPI
1570 };
1571
1572 /* As a server, this could in theory accept any GSSAPI mech */
1573 static const struct gensec_security_ops gensec_gssapi_sasl_krb5_security_ops = {
1574         .name             = "gssapi_krb5_sasl",
1575         .sasl_name        = "GSSAPI",
1576         .client_start     = gensec_gssapi_sasl_client_start,
1577         .server_start     = gensec_gssapi_sasl_server_start,
1578         .update           = gensec_gssapi_update,
1579         .session_key      = gensec_gssapi_session_key,
1580         .session_info     = gensec_gssapi_session_info,
1581         .max_input_size   = gensec_gssapi_max_input_size,
1582         .max_wrapped_size = gensec_gssapi_max_wrapped_size,
1583         .wrap             = gensec_gssapi_wrap,
1584         .unwrap           = gensec_gssapi_unwrap,
1585         .have_feature     = gensec_gssapi_have_feature,
1586         .expire_time      = gensec_gssapi_expire_time,
1587         .enabled          = true,
1588         .kerberos         = true,
1589         .priority         = GENSEC_GSSAPI
1590 };
1591
1592 _PUBLIC_ NTSTATUS gensec_gssapi_init(void)
1593 {
1594         NTSTATUS ret;
1595
1596         ret = gensec_register(&gensec_gssapi_spnego_security_ops);
1597         if (!NT_STATUS_IS_OK(ret)) {
1598                 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1599                         gensec_gssapi_spnego_security_ops.name));
1600                 return ret;
1601         }
1602
1603         ret = gensec_register(&gensec_gssapi_krb5_security_ops);
1604         if (!NT_STATUS_IS_OK(ret)) {
1605                 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1606                         gensec_gssapi_krb5_security_ops.name));
1607                 return ret;
1608         }
1609
1610         ret = gensec_register(&gensec_gssapi_sasl_krb5_security_ops);
1611         if (!NT_STATUS_IS_OK(ret)) {
1612                 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1613                         gensec_gssapi_sasl_krb5_security_ops.name));
1614                 return ret;
1615         }
1616
1617         return ret;
1618 }