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 "auth/kerberos/kerberos.h"
  28 #include "librpc/gen_ndr/krb5pac.h"
  29 #include "auth/auth.h"
  30 #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 #include <gssapi/gssapi_spnego.h>
  42 #include "auth/gensec/gensec_gssapi.h"
  43 #include "lib/util/util_net.h"
  44
  45 _PUBLIC_ NTSTATUS gensec_gssapi_init(void);
  46
  47 static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security);
  48 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security);
  49
  50 static int gensec_gssapi_destructor(struct gensec_gssapi_state *gensec_gssapi_state)
  51 {
  52         OM_uint32 maj_stat, min_stat;
  53
  54         if (gensec_gssapi_state->delegated_cred_handle != GSS_C_NO_CREDENTIAL) {
  55                 maj_stat = gss_release_cred(&min_stat,
  56                                             &gensec_gssapi_state->delegated_cred_handle);
  57         }
  58
  59         if (gensec_gssapi_state->gssapi_context != GSS_C_NO_CONTEXT) {
  60                 maj_stat = gss_delete_sec_context (&min_stat,
  61                                                    &gensec_gssapi_state->gssapi_context,
  62                                                    GSS_C_NO_BUFFER);
  63         }
  64
  65         if (gensec_gssapi_state->server_name != GSS_C_NO_NAME) {
  66                 maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->server_name);
  67         }
  68         if (gensec_gssapi_state->client_name != GSS_C_NO_NAME) {
  69                 maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->client_name);
  70         }
  71
  72         if (gensec_gssapi_state->lucid) {
  73                 gss_krb5_free_lucid_sec_context(&min_stat, gensec_gssapi_state->lucid);
  74         }
  75
  76         return 0;
  77 }
  78
  79 static NTSTATUS gensec_gssapi_init_lucid(struct gensec_gssapi_state *gensec_gssapi_state)
  80 {
  81         OM_uint32 maj_stat, min_stat;
  82
  83         if (gensec_gssapi_state->lucid) {
  84                 return NT_STATUS_OK;
  85         }
  86
  87         maj_stat = gss_krb5_export_lucid_sec_context(&min_stat,
  88                                                      &gensec_gssapi_state->gssapi_context,
  89                                                      1,
  90                                                      (void **)&gensec_gssapi_state->lucid);
  91         if (maj_stat != GSS_S_COMPLETE) {
  92                 DEBUG(0,("gensec_gssapi_init_lucid: %s\n",
  93                         gssapi_error_string(gensec_gssapi_state,
  94                                             maj_stat, min_stat,
  95                                             gensec_gssapi_state->gss_oid)));
  96                 return NT_STATUS_INTERNAL_ERROR;
  97         }
  98
  99         if (gensec_gssapi_state->lucid->version != 1) {
 100                 DEBUG(0,("gensec_gssapi_init_lucid: lucid version[%d] != 1\n",
 101                         gensec_gssapi_state->lucid->version));
 102                 gss_krb5_free_lucid_sec_context(&min_stat, gensec_gssapi_state->lucid);
 103                 gensec_gssapi_state->lucid = NULL;
 104                 return NT_STATUS_INTERNAL_ERROR;
 105         }
 106
 107         return NT_STATUS_OK;
 108 }
 109
 110 static NTSTATUS gensec_gssapi_start(struct gensec_security *gensec_security)
 111 {
 112         struct gensec_gssapi_state *gensec_gssapi_state;
 113         krb5_error_code ret;
 114         const char *realm;
 115
 116         gensec_gssapi_state = talloc_zero(gensec_security, struct gensec_gssapi_state);
 117         if (!gensec_gssapi_state) {
 118                 return NT_STATUS_NO_MEMORY;
 119         }
 120
 121         gensec_security->private_data = gensec_gssapi_state;
 122
 123         gensec_gssapi_state->gssapi_context = GSS_C_NO_CONTEXT;
 124
 125         /* TODO: Fill in channel bindings */
 126         gensec_gssapi_state->input_chan_bindings = GSS_C_NO_CHANNEL_BINDINGS;
 127
 128         gensec_gssapi_state->server_name = GSS_C_NO_NAME;
 129         gensec_gssapi_state->client_name = GSS_C_NO_NAME;
 130
 131         gensec_gssapi_state->want_flags = 0;
 132
 133         if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "delegation_by_kdc_policy", true)) {
 134                 gensec_gssapi_state->want_flags |= GSS_C_DELEG_POLICY_FLAG;
 135         }
 136         if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "mutual", true)) {
 137                 gensec_gssapi_state->want_flags |= GSS_C_MUTUAL_FLAG;
 138         }
 139         if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "delegation", true)) {
 140                 gensec_gssapi_state->want_flags |= GSS_C_DELEG_FLAG;
 141         }
 142         if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "replay", true)) {
 143                 gensec_gssapi_state->want_flags |= GSS_C_REPLAY_FLAG;
 144         }
 145         if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "sequence", true)) {
 146                 gensec_gssapi_state->want_flags |= GSS_C_SEQUENCE_FLAG;
 147         }
 148
 149         if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
 150                 gensec_gssapi_state->want_flags |= GSS_C_INTEG_FLAG;
 151         }
 152         if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
 153                 gensec_gssapi_state->want_flags |= GSS_C_CONF_FLAG;
 154         }
 155         if (gensec_security->want_features & GENSEC_FEATURE_DCE_STYLE) {
 156                 gensec_gssapi_state->want_flags |= GSS_C_DCE_STYLE;
 157         }
 158
 159         gensec_gssapi_state->got_flags = 0;
 160
 161         switch (gensec_security->ops->auth_type) {
 162         case DCERPC_AUTH_TYPE_SPNEGO:
 163                 gensec_gssapi_state->gss_oid = gss_mech_spnego;
 164                 break;
 165         case DCERPC_AUTH_TYPE_KRB5:
 166         default:
 167                 gensec_gssapi_state->gss_oid = gss_mech_krb5;
 168                 break;
 169         }
 170
 171         gensec_gssapi_state->session_key = data_blob(NULL, 0);
 172         gensec_gssapi_state->pac = data_blob(NULL, 0);
 173
 174         ret = smb_krb5_init_context(gensec_gssapi_state,
 175                                     NULL,
 176                                     gensec_security->settings->lp_ctx,
 177                                     &gensec_gssapi_state->smb_krb5_context);
 178         if (ret) {
 179                 DEBUG(1,("gensec_krb5_start: krb5_init_context failed (%s)\n",
 180                          error_message(ret)));
 181                 talloc_free(gensec_gssapi_state);
 182                 return NT_STATUS_INTERNAL_ERROR;
 183         }
 184
 185         gensec_gssapi_state->client_cred = NULL;
 186         gensec_gssapi_state->server_cred = NULL;
 187
 188         gensec_gssapi_state->lucid = NULL;
 189
 190         gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
 191
 192         gensec_gssapi_state->sasl = false;
 193         gensec_gssapi_state->sasl_state = STAGE_GSS_NEG;
 194         gensec_gssapi_state->sasl_protection = 0;
 195
 196         gensec_gssapi_state->max_wrap_buf_size
 197                 = gensec_setting_int(gensec_security->settings, "gensec_gssapi", "max wrap buf size", 65536);
 198         gensec_gssapi_state->gss_exchange_count = 0;
 199         gensec_gssapi_state->sig_size = 0;
 200
 201         talloc_set_destructor(gensec_gssapi_state, gensec_gssapi_destructor);
 202
 203         realm = lpcfg_realm(gensec_security->settings->lp_ctx);
 204         if (realm != NULL) {
 205                 ret = gsskrb5_set_default_realm(realm);
 206                 if (ret) {
 207                         DEBUG(1,("gensec_krb5_start: gsskrb5_set_default_realm failed\n"));
 208                         talloc_free(gensec_gssapi_state);
 209                         return NT_STATUS_INTERNAL_ERROR;
 210                 }
 211         }
 212
 213         /* don't do DNS lookups of any kind, it might/will fail for a netbios name */
 214         ret = gsskrb5_set_dns_canonicalize(gensec_setting_bool(gensec_security->settings, "krb5", "set_dns_canonicalize", false));
 215         if (ret) {
 216                 DEBUG(1,("gensec_krb5_start: gsskrb5_set_dns_canonicalize failed\n"));
 217                 talloc_free(gensec_gssapi_state);
 218                 return NT_STATUS_INTERNAL_ERROR;
 219         }
 220
 221         return NT_STATUS_OK;
 222 }
 223
 224 static NTSTATUS gensec_gssapi_server_start(struct gensec_security *gensec_security)
 225 {
 226         NTSTATUS nt_status;
 227         int ret;
 228         struct gensec_gssapi_state *gensec_gssapi_state;
 229         struct cli_credentials *machine_account;
 230         struct gssapi_creds_container *gcc;
 231
 232         nt_status = gensec_gssapi_start(gensec_security);
 233         if (!NT_STATUS_IS_OK(nt_status)) {
 234                 return nt_status;
 235         }
 236
 237         gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 238
 239         machine_account = gensec_get_credentials(gensec_security);
 240
 241         if (!machine_account) {
 242                 DEBUG(3, ("No machine account credentials specified\n"));
 243                 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 244         } else {
 245                 ret = cli_credentials_get_server_gss_creds(machine_account,
 246                                                            gensec_security->settings->lp_ctx, &gcc);
 247                 if (ret) {
 248                         DEBUG(1, ("Aquiring acceptor credentials failed: %s\n",
 249                                   error_message(ret)));
 250                         return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 251                 }
 252         }
 253
 254         gensec_gssapi_state->server_cred = gcc;
 255         return NT_STATUS_OK;
 256
 257 }
 258
 259 static NTSTATUS gensec_gssapi_sasl_server_start(struct gensec_security *gensec_security)
 260 {
 261         NTSTATUS nt_status;
 262         struct gensec_gssapi_state *gensec_gssapi_state;
 263         nt_status = gensec_gssapi_server_start(gensec_security);
 264
 265         if (NT_STATUS_IS_OK(nt_status)) {
 266                 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 267                 gensec_gssapi_state->sasl = true;
 268         }
 269         return nt_status;
 270 }
 271
 272 static NTSTATUS gensec_gssapi_client_start(struct gensec_security *gensec_security)
 273 {
 274         struct gensec_gssapi_state *gensec_gssapi_state;
 275         struct cli_credentials *creds = gensec_get_credentials(gensec_security);
 276         krb5_error_code ret;
 277         NTSTATUS nt_status;
 278         gss_buffer_desc name_token;
 279         gss_OID name_type;
 280         OM_uint32 maj_stat, min_stat;
 281         const char *hostname = gensec_get_target_hostname(gensec_security);
 282         struct gssapi_creds_container *gcc;
 283         const char *error_string;
 284
 285         if (!hostname) {
 286                 DEBUG(1, ("Could not determine hostname for target computer, cannot use kerberos\n"));
 287                 return NT_STATUS_INVALID_PARAMETER;
 288         }
 289         if (is_ipaddress(hostname)) {
 290                 DEBUG(2, ("Cannot do GSSAPI to an IP address\n"));
 291                 return NT_STATUS_INVALID_PARAMETER;
 292         }
 293         if (strcmp(hostname, "localhost") == 0) {
 294                 DEBUG(2, ("GSSAPI to 'localhost' does not make sense\n"));
 295                 return NT_STATUS_INVALID_PARAMETER;
 296         }
 297
 298         nt_status = gensec_gssapi_start(gensec_security);
 299         if (!NT_STATUS_IS_OK(nt_status)) {
 300                 return nt_status;
 301         }
 302
 303         gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 304
 305         if (cli_credentials_get_impersonate_principal(creds)) {
 306                 gensec_gssapi_state->want_flags &= ~(GSS_C_DELEG_FLAG|GSS_C_DELEG_POLICY_FLAG);
 307         }
 308
 309         gensec_gssapi_state->target_principal = gensec_get_target_principal(gensec_security);
 310         if (gensec_gssapi_state->target_principal) {
 311                 name_type = GSS_C_NULL_OID;
 312         } else {
 313                 gensec_gssapi_state->target_principal = talloc_asprintf(gensec_gssapi_state, "%s/%s@%s",
 314                                             gensec_get_target_service(gensec_security),
 315                                             hostname, lpcfg_realm(gensec_security->settings->lp_ctx));
 316
 317                 name_type = GSS_C_NT_USER_NAME;
 318         }
 319         name_token.value  = discard_const_p(uint8_t, gensec_gssapi_state->target_principal);
 320         name_token.length = strlen(gensec_gssapi_state->target_principal);
 321
 322
 323         maj_stat = gss_import_name (&min_stat,
 324                                     &name_token,
 325                                     name_type,
 326                                     &gensec_gssapi_state->server_name);
 327         if (maj_stat) {
 328                 DEBUG(2, ("GSS Import name of %s failed: %s\n",
 329                           (char *)name_token.value,
 330                           gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 331                 return NT_STATUS_INVALID_PARAMETER;
 332         }
 333
 334         ret = cli_credentials_get_client_gss_creds(creds,
 335                                                    gensec_security->event_ctx,
 336                                                    gensec_security->settings->lp_ctx, &gcc, &error_string);
 337         switch (ret) {
 338         case 0:
 339                 break;
 340         case KRB5KDC_ERR_PREAUTH_FAILED:
 341         case KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN:
 342                 DEBUG(1, ("Wrong username or password: %s\n", error_string));
 343                 return NT_STATUS_LOGON_FAILURE;
 344         case KRB5_KDC_UNREACH:
 345                 DEBUG(3, ("Cannot reach a KDC we require to contact %s : %s\n", gensec_gssapi_state->target_principal, error_string));
 346                 return NT_STATUS_NO_LOGON_SERVERS;
 347         case KRB5_CC_NOTFOUND:
 348         case KRB5_CC_END:
 349                 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));
 350                 return NT_STATUS_TIME_DIFFERENCE_AT_DC;
 351         default:
 352                 DEBUG(1, ("Aquiring initiator credentials failed: %s\n", error_string));
 353                 return NT_STATUS_UNSUCCESSFUL;
 354         }
 355
 356         gensec_gssapi_state->client_cred = gcc;
 357         if (!talloc_reference(gensec_gssapi_state, gcc)) {
 358                 return NT_STATUS_NO_MEMORY;
 359         }
 360
 361         return NT_STATUS_OK;
 362 }
 363
 364 static NTSTATUS gensec_gssapi_sasl_client_start(struct gensec_security *gensec_security)
 365 {
 366         NTSTATUS nt_status;
 367         struct gensec_gssapi_state *gensec_gssapi_state;
 368         nt_status = gensec_gssapi_client_start(gensec_security);
 369
 370         if (NT_STATUS_IS_OK(nt_status)) {
 371                 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 372                 gensec_gssapi_state->sasl = true;
 373         }
 374         return nt_status;
 375 }
 376
 377
 378 /**
 379  * Check if the packet is one for this mechansim
 380  *
 381  * @param gensec_security GENSEC state
 382  * @param in The request, as a DATA_BLOB
 383  * @return Error, INVALID_PARAMETER if it's not a packet for us
 384  *                or NT_STATUS_OK if the packet is ok.
 385  */
 386
 387 static NTSTATUS gensec_gssapi_magic(struct gensec_security *gensec_security,
 388                                     const DATA_BLOB *in)
 389 {
 390         if (gensec_gssapi_check_oid(in, GENSEC_OID_KERBEROS5)) {
 391                 return NT_STATUS_OK;
 392         } else {
 393                 return NT_STATUS_INVALID_PARAMETER;
 394         }
 395 }
 396
 397
 398 /**
 399  * Next state function for the GSSAPI GENSEC mechanism
 400  *
 401  * @param gensec_gssapi_state GSSAPI State
 402  * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
 403  * @param in The request, as a DATA_BLOB
 404  * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
 405  * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
 406  *                or NT_STATUS_OK if the user is authenticated.
 407  */
 408
 409 static NTSTATUS gensec_gssapi_update(struct gensec_security *gensec_security,
 410                                    TALLOC_CTX *out_mem_ctx,
 411                                    const DATA_BLOB in, DATA_BLOB *out)
 412 {
 413         struct gensec_gssapi_state *gensec_gssapi_state
 414                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 415         NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
 416         OM_uint32 maj_stat, min_stat;
 417         OM_uint32 min_stat2;
 418         gss_buffer_desc input_token, output_token;
 419         gss_OID gss_oid_p = NULL;
 420         input_token.length = in.length;
 421         input_token.value = in.data;
 422
 423         switch (gensec_gssapi_state->sasl_state) {
 424         case STAGE_GSS_NEG:
 425         {
 426                 switch (gensec_security->gensec_role) {
 427                 case GENSEC_CLIENT:
 428                 {
 429                         struct gsskrb5_send_to_kdc send_to_kdc;
 430                         krb5_error_code ret;
 431                         send_to_kdc.func = smb_krb5_send_and_recv_func;
 432                         send_to_kdc.ptr = gensec_security->event_ctx;
 433
 434                         min_stat = gsskrb5_set_send_to_kdc(&send_to_kdc);
 435                         if (min_stat) {
 436                                 DEBUG(1,("gensec_krb5_start: gsskrb5_set_send_to_kdc failed\n"));
 437                                 return NT_STATUS_INTERNAL_ERROR;
 438                         }
 439
 440                         maj_stat = gss_init_sec_context(&min_stat,
 441                                                         gensec_gssapi_state->client_cred->creds,
 442                                                         &gensec_gssapi_state->gssapi_context,
 443                                                         gensec_gssapi_state->server_name,
 444                                                         gensec_gssapi_state->gss_oid,
 445                                                         gensec_gssapi_state->want_flags,
 446                                                         0,
 447                                                         gensec_gssapi_state->input_chan_bindings,
 448                                                         &input_token,
 449                                                         &gss_oid_p,
 450                                                         &output_token,
 451                                                         &gensec_gssapi_state->got_flags, /* ret flags */
 452                                                         NULL);
 453                         if (gss_oid_p) {
 454                                 gensec_gssapi_state->gss_oid = gss_oid_p;
 455                         }
 456
 457                         send_to_kdc.func = smb_krb5_send_and_recv_func;
 458                         send_to_kdc.ptr = NULL;
 459
 460                         ret = gsskrb5_set_send_to_kdc(&send_to_kdc);
 461                         if (ret) {
 462                                 DEBUG(1,("gensec_krb5_start: gsskrb5_set_send_to_kdc failed\n"));
 463                                 return NT_STATUS_INTERNAL_ERROR;
 464                         }
 465
 466                         break;
 467                 }
 468                 case GENSEC_SERVER:
 469                 {
 470                         maj_stat = gss_accept_sec_context(&min_stat,
 471                                                           &gensec_gssapi_state->gssapi_context,
 472                                                           gensec_gssapi_state->server_cred->creds,
 473                                                           &input_token,
 474                                                           gensec_gssapi_state->input_chan_bindings,
 475                                                           &gensec_gssapi_state->client_name,
 476                                                           &gss_oid_p,
 477                                                           &output_token,
 478                                                           &gensec_gssapi_state->got_flags,
 479                                                           NULL,
 480                                                           &gensec_gssapi_state->delegated_cred_handle);
 481                         if (gss_oid_p) {
 482                                 gensec_gssapi_state->gss_oid = gss_oid_p;
 483                         }
 484                         break;
 485                 }
 486                 default:
 487                         return NT_STATUS_INVALID_PARAMETER;
 488
 489                 }
 490
 491                 gensec_gssapi_state->gss_exchange_count++;
 492
 493                 if (maj_stat == GSS_S_COMPLETE) {
 494                         *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
 495                         gss_release_buffer(&min_stat2, &output_token);
 496
 497                         if (gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG) {
 498                                 DEBUG(5, ("gensec_gssapi: credentials were delegated\n"));
 499                         } else {
 500                                 DEBUG(5, ("gensec_gssapi: NO credentials were delegated\n"));
 501                         }
 502
 503                         /* We may have been invoked as SASL, so there
 504                          * is more work to do */
 505                         if (gensec_gssapi_state->sasl) {
 506                                 gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_NEG;
 507                                 return NT_STATUS_MORE_PROCESSING_REQUIRED;
 508                         } else {
 509                                 gensec_gssapi_state->sasl_state = STAGE_DONE;
 510
 511                                 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 512                                         DEBUG(5, ("GSSAPI Connection will be cryptographically sealed\n"));
 513                                 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 514                                         DEBUG(5, ("GSSAPI Connection will be cryptographically signed\n"));
 515                                 } else {
 516                                         DEBUG(5, ("GSSAPI Connection will have no cryptographic protection\n"));
 517                                 }
 518
 519                                 return NT_STATUS_OK;
 520                         }
 521                 } else if (maj_stat == GSS_S_CONTINUE_NEEDED) {
 522                         *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
 523                         gss_release_buffer(&min_stat2, &output_token);
 524
 525                         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 526                 } else if (maj_stat == GSS_S_CONTEXT_EXPIRED) {
 527                         gss_cred_id_t creds;
 528                         gss_name_t name;
 529                         gss_buffer_desc buffer;
 530                         OM_uint32 lifetime = 0;
 531                         gss_cred_usage_t usage;
 532                         const char *role = NULL;
 533                         DEBUG(0, ("GSS %s Update(krb5)(%d) Update failed, credentials expired during GSSAPI handshake!\n",
 534                                   role,
 535                                   gensec_gssapi_state->gss_exchange_count));
 536
 537
 538                         switch (gensec_security->gensec_role) {
 539                         case GENSEC_CLIENT:
 540                                 creds = gensec_gssapi_state->client_cred->creds;
 541                                 role = "client";
 542                         case GENSEC_SERVER:
 543                                 creds = gensec_gssapi_state->server_cred->creds;
 544                                 role = "server";
 545                         }
 546
 547                         maj_stat = gss_inquire_cred(&min_stat,
 548                                                     creds,
 549                                                     &name, &lifetime, &usage, NULL);
 550
 551                         if (maj_stat == GSS_S_COMPLETE) {
 552                                 const char *usage_string;
 553                                 switch (usage) {
 554                                 case GSS_C_BOTH:
 555                                         usage_string = "GSS_C_BOTH";
 556                                         break;
 557                                 case GSS_C_ACCEPT:
 558                                         usage_string = "GSS_C_ACCEPT";
 559                                         break;
 560                                 case GSS_C_INITIATE:
 561                                         usage_string = "GSS_C_INITIATE";
 562                                         break;
 563                                 }
 564                                 maj_stat = gss_display_name(&min_stat, name, &buffer, NULL);
 565                                 if (maj_stat) {
 566                                         buffer.value = NULL;
 567                                         buffer.length = 0;
 568                                 }
 569                                 if (lifetime > 0) {
 570                                         DEBUG(0, ("GSSAPI gss_inquire_cred indicates expiry of %*.*s in %u sec for %s\n",
 571                                                   (int)buffer.length, (int)buffer.length, (char *)buffer.value,
 572                                                   lifetime, usage_string));
 573                                 } else {
 574                                         DEBUG(0, ("GSSAPI gss_inquire_cred indicates %*.*s has already expired for %s\n",
 575                                                   (int)buffer.length, (int)buffer.length, (char *)buffer.value,
 576                                                   usage_string));
 577                                 }
 578                                 gss_release_buffer(&min_stat, &buffer);
 579                                 gss_release_name(&min_stat, &name);
 580                         } else if (maj_stat != GSS_S_COMPLETE) {
 581                                 DEBUG(0, ("inquiry of credential lifefime via GSSAPI gss_inquire_cred failed: %s\n",
 582                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 583                         }
 584                         return NT_STATUS_INVALID_PARAMETER;
 585                 } else if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
 586                         switch (min_stat) {
 587                         case KRB5KRB_AP_ERR_TKT_NYV:
 588                                 DEBUG(1, ("Error with ticket to contact %s: possible clock skew between us and the KDC or target server: %s\n",
 589                                           gensec_gssapi_state->target_principal,
 590                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 591                                 return NT_STATUS_TIME_DIFFERENCE_AT_DC; /* Make SPNEGO ignore us, we can't go any further here */
 592                         case KRB5KRB_AP_ERR_TKT_EXPIRED:
 593                                 DEBUG(1, ("Error with ticket to contact %s: ticket is expired, possible clock skew between us and the KDC or target server: %s\n",
 594                                           gensec_gssapi_state->target_principal,
 595                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 596                                 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
 597                         case KRB5_KDC_UNREACH:
 598                                 DEBUG(3, ("Cannot reach a KDC we require in order to obtain a ticetk to %s: %s\n",
 599                                           gensec_gssapi_state->target_principal,
 600                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 601                                 return NT_STATUS_NO_LOGON_SERVERS; /* Make SPNEGO ignore us, we can't go any further here */
 602                         case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN:
 603                                 DEBUG(3, ("Server %s is not registered with our KDC: %s\n",
 604                                           gensec_gssapi_state->target_principal,
 605                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 606                                 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
 607                         case KRB5KRB_AP_ERR_MSG_TYPE:
 608                                 /* garbage input, possibly from the auto-mech detection */
 609                                 return NT_STATUS_INVALID_PARAMETER;
 610                         default:
 611                                 DEBUG(1, ("GSS %s Update(krb5)(%d) Update failed: %s\n",
 612                                           gensec_security->gensec_role == GENSEC_CLIENT ? "client" : "server",
 613                                           gensec_gssapi_state->gss_exchange_count,
 614                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 615                                 return nt_status;
 616                         }
 617                 } else {
 618                         DEBUG(1, ("GSS %s Update(%d) failed: %s\n",
 619                                   gensec_security->gensec_role == GENSEC_CLIENT ? "client" : "server",
 620                                   gensec_gssapi_state->gss_exchange_count,
 621                                   gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 622                         return nt_status;
 623                 }
 624                 break;
 625         }
 626
 627         /* These last two stages are only done if we were invoked as SASL */
 628         case STAGE_SASL_SSF_NEG:
 629         {
 630                 switch (gensec_security->gensec_role) {
 631                 case GENSEC_CLIENT:
 632                 {
 633                         uint8_t maxlength_proposed[4];
 634                         uint8_t maxlength_accepted[4];
 635                         uint8_t security_supported;
 636                         int conf_state;
 637                         gss_qop_t qop_state;
 638                         input_token.length = in.length;
 639                         input_token.value = in.data;
 640
 641                         /* As a client, we have just send a
 642                          * zero-length blob to the server (after the
 643                          * normal GSSAPI exchange), and it has replied
 644                          * with it's SASL negotiation */
 645
 646                         maj_stat = gss_unwrap(&min_stat,
 647                                               gensec_gssapi_state->gssapi_context,
 648                                               &input_token,
 649                                               &output_token,
 650                                               &conf_state,
 651                                               &qop_state);
 652                         if (GSS_ERROR(maj_stat)) {
 653                                 DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
 654                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 655                                 return NT_STATUS_ACCESS_DENIED;
 656                         }
 657
 658                         if (output_token.length < 4) {
 659                                 return NT_STATUS_INVALID_PARAMETER;
 660                         }
 661
 662                         memcpy(maxlength_proposed, output_token.value, 4);
 663                         gss_release_buffer(&min_stat, &output_token);
 664
 665                         /* first byte is the proposed security */
 666                         security_supported = maxlength_proposed[0];
 667                         maxlength_proposed[0] = '\0';
 668
 669                         /* Rest is the proposed max wrap length */
 670                         gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_proposed, 0),
 671                                                                      gensec_gssapi_state->max_wrap_buf_size);
 672                         gensec_gssapi_state->sasl_protection = 0;
 673                         if (security_supported & NEG_SEAL) {
 674                                 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 675                                         gensec_gssapi_state->sasl_protection |= NEG_SEAL;
 676                                 }
 677                         }
 678                         if (security_supported & NEG_SIGN) {
 679                                 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 680                                         gensec_gssapi_state->sasl_protection |= NEG_SIGN;
 681                                 }
 682                         }
 683                         if (security_supported & NEG_NONE) {
 684                                 gensec_gssapi_state->sasl_protection |= NEG_NONE;
 685                         }
 686                         if (gensec_gssapi_state->sasl_protection == 0) {
 687                                 DEBUG(1, ("Remote server does not support unprotected connections\n"));
 688                                 return NT_STATUS_ACCESS_DENIED;
 689                         }
 690
 691                         /* Send back the negotiated max length */
 692
 693                         RSIVAL(maxlength_accepted, 0, gensec_gssapi_state->max_wrap_buf_size);
 694
 695                         maxlength_accepted[0] = gensec_gssapi_state->sasl_protection;
 696
 697                         input_token.value = maxlength_accepted;
 698                         input_token.length = sizeof(maxlength_accepted);
 699
 700                         maj_stat = gss_wrap(&min_stat,
 701                                             gensec_gssapi_state->gssapi_context,
 702                                             false,
 703                                             GSS_C_QOP_DEFAULT,
 704                                             &input_token,
 705                                             &conf_state,
 706                                             &output_token);
 707                         if (GSS_ERROR(maj_stat)) {
 708                                 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
 709                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 710                                 return NT_STATUS_ACCESS_DENIED;
 711                         }
 712
 713                         *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
 714                         gss_release_buffer(&min_stat, &output_token);
 715
 716                         /* quirk:  This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
 717                         gensec_gssapi_state->sasl_state = STAGE_DONE;
 718
 719                         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 720                                 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographically sealed\n"));
 721                         } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 722                                 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographically signed\n"));
 723                         } else {
 724                                 DEBUG(3, ("SASL/GSSAPI Connection to server will have no cryptographically protection\n"));
 725                         }
 726
 727                         return NT_STATUS_OK;
 728                 }
 729                 case GENSEC_SERVER:
 730                 {
 731                         uint8_t maxlength_proposed[4];
 732                         uint8_t security_supported = 0x0;
 733                         int conf_state;
 734
 735                         /* As a server, we have just been sent a zero-length blob (note this, but it isn't fatal) */
 736                         if (in.length != 0) {
 737                                 DEBUG(1, ("SASL/GSSAPI: client sent non-zero length starting SASL negotiation!\n"));
 738                         }
 739
 740                         /* Give the client some idea what we will support */
 741
 742                         RSIVAL(maxlength_proposed, 0, gensec_gssapi_state->max_wrap_buf_size);
 743                         /* first byte is the proposed security */
 744                         maxlength_proposed[0] = '\0';
 745
 746                         gensec_gssapi_state->sasl_protection = 0;
 747                         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 748                                 security_supported |= NEG_SEAL;
 749                         }
 750                         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 751                                 security_supported |= NEG_SIGN;
 752                         }
 753                         if (security_supported == 0) {
 754                                 /* If we don't support anything, this must be 0 */
 755                                 RSIVAL(maxlength_proposed, 0, 0x0);
 756                         }
 757
 758                         /* TODO:  We may not wish to support this */
 759                         security_supported |= NEG_NONE;
 760                         maxlength_proposed[0] = security_supported;
 761
 762                         input_token.value = maxlength_proposed;
 763                         input_token.length = sizeof(maxlength_proposed);
 764
 765                         maj_stat = gss_wrap(&min_stat,
 766                                             gensec_gssapi_state->gssapi_context,
 767                                             false,
 768                                             GSS_C_QOP_DEFAULT,
 769                                             &input_token,
 770                                             &conf_state,
 771                                             &output_token);
 772                         if (GSS_ERROR(maj_stat)) {
 773                                 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
 774                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 775                                 return NT_STATUS_ACCESS_DENIED;
 776                         }
 777
 778                         *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
 779                         gss_release_buffer(&min_stat, &output_token);
 780
 781                         gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_ACCEPT;
 782                         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 783                 }
 784                 default:
 785                         return NT_STATUS_INVALID_PARAMETER;
 786
 787                 }
 788         }
 789         /* This is s server-only stage */
 790         case STAGE_SASL_SSF_ACCEPT:
 791         {
 792                 uint8_t maxlength_accepted[4];
 793                 uint8_t security_accepted;
 794                 int conf_state;
 795                 gss_qop_t qop_state;
 796                 input_token.length = in.length;
 797                 input_token.value = in.data;
 798
 799                 maj_stat = gss_unwrap(&min_stat,
 800                                       gensec_gssapi_state->gssapi_context,
 801                                       &input_token,
 802                                       &output_token,
 803                                       &conf_state,
 804                                       &qop_state);
 805                 if (GSS_ERROR(maj_stat)) {
 806                         DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
 807                                   gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 808                         return NT_STATUS_ACCESS_DENIED;
 809                 }
 810
 811                 if (output_token.length < 4) {
 812                         return NT_STATUS_INVALID_PARAMETER;
 813                 }
 814
 815                 memcpy(maxlength_accepted, output_token.value, 4);
 816                 gss_release_buffer(&min_stat, &output_token);
 817
 818                 /* first byte is the proposed security */
 819                 security_accepted = maxlength_accepted[0];
 820                 maxlength_accepted[0] = '\0';
 821
 822                 /* Rest is the proposed max wrap length */
 823                 gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_accepted, 0),
 824                                                              gensec_gssapi_state->max_wrap_buf_size);
 825
 826                 gensec_gssapi_state->sasl_protection = 0;
 827                 if (security_accepted & NEG_SEAL) {
 828                         if (!gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 829                                 DEBUG(1, ("Remote client wanted seal, but gensec refused\n"));
 830                                 return NT_STATUS_ACCESS_DENIED;
 831                         }
 832                         gensec_gssapi_state->sasl_protection |= NEG_SEAL;
 833                 }
 834                 if (security_accepted & NEG_SIGN) {
 835                         if (!gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 836                                 DEBUG(1, ("Remote client wanted sign, but gensec refused\n"));
 837                                 return NT_STATUS_ACCESS_DENIED;
 838                         }
 839                         gensec_gssapi_state->sasl_protection |= NEG_SIGN;
 840                 }
 841                 if (security_accepted & NEG_NONE) {
 842                         gensec_gssapi_state->sasl_protection |= NEG_NONE;
 843                 }
 844
 845                 /* quirk:  This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
 846                 gensec_gssapi_state->sasl_state = STAGE_DONE;
 847                 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 848                         DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographically sealed\n"));
 849                 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 850                         DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographically signed\n"));
 851                 } else {
 852                         DEBUG(5, ("SASL/GSSAPI Connection from client will have no cryptographic protection\n"));
 853                 }
 854
 855                 *out = data_blob(NULL, 0);
 856                 return NT_STATUS_OK;
 857         }
 858         default:
 859                 return NT_STATUS_INVALID_PARAMETER;
 860         }
 861 }
 862
 863 static NTSTATUS gensec_gssapi_wrap(struct gensec_security *gensec_security,
 864                                    TALLOC_CTX *mem_ctx,
 865                                    const DATA_BLOB *in,
 866                                    DATA_BLOB *out)
 867 {
 868         struct gensec_gssapi_state *gensec_gssapi_state
 869                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 870         OM_uint32 maj_stat, min_stat;
 871         gss_buffer_desc input_token, output_token;
 872         int conf_state;
 873         input_token.length = in->length;
 874         input_token.value = in->data;
 875
 876         maj_stat = gss_wrap(&min_stat,
 877                             gensec_gssapi_state->gssapi_context,
 878                             gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
 879                             GSS_C_QOP_DEFAULT,
 880                             &input_token,
 881                             &conf_state,
 882                             &output_token);
 883         if (GSS_ERROR(maj_stat)) {
 884                 DEBUG(1, ("gensec_gssapi_wrap: GSS Wrap failed: %s\n",
 885                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 886                 return NT_STATUS_ACCESS_DENIED;
 887         }
 888
 889         *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
 890         gss_release_buffer(&min_stat, &output_token);
 891
 892         if (gensec_gssapi_state->sasl) {
 893                 size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
 894                 if (max_wrapped_size < out->length) {
 895                         DEBUG(1, ("gensec_gssapi_wrap: when wrapped, INPUT data (%u) is grew to be larger than SASL negotiated maximum output size (%u > %u)\n",
 896                                   (unsigned)in->length,
 897                                   (unsigned)out->length,
 898                                   (unsigned int)max_wrapped_size));
 899                         return NT_STATUS_INVALID_PARAMETER;
 900                 }
 901         }
 902
 903         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
 904             && !conf_state) {
 905                 return NT_STATUS_ACCESS_DENIED;
 906         }
 907         return NT_STATUS_OK;
 908 }
 909
 910 static NTSTATUS gensec_gssapi_unwrap(struct gensec_security *gensec_security,
 911                                      TALLOC_CTX *mem_ctx,
 912                                      const DATA_BLOB *in,
 913                                      DATA_BLOB *out)
 914 {
 915         struct gensec_gssapi_state *gensec_gssapi_state
 916                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 917         OM_uint32 maj_stat, min_stat;
 918         gss_buffer_desc input_token, output_token;
 919         int conf_state;
 920         gss_qop_t qop_state;
 921         input_token.length = in->length;
 922         input_token.value = in->data;
 923
 924         if (gensec_gssapi_state->sasl) {
 925                 size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
 926                 if (max_wrapped_size < in->length) {
 927                         DEBUG(1, ("gensec_gssapi_unwrap: WRAPPED data is larger than SASL negotiated maximum size\n"));
 928                         return NT_STATUS_INVALID_PARAMETER;
 929                 }
 930         }
 931
 932         maj_stat = gss_unwrap(&min_stat,
 933                               gensec_gssapi_state->gssapi_context,
 934                               &input_token,
 935                               &output_token,
 936                               &conf_state,
 937                               &qop_state);
 938         if (GSS_ERROR(maj_stat)) {
 939                 DEBUG(1, ("gensec_gssapi_unwrap: GSS UnWrap failed: %s\n",
 940                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 941                 return NT_STATUS_ACCESS_DENIED;
 942         }
 943
 944         *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
 945         gss_release_buffer(&min_stat, &output_token);
 946
 947         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
 948             && !conf_state) {
 949                 return NT_STATUS_ACCESS_DENIED;
 950         }
 951         return NT_STATUS_OK;
 952 }
 953
 954 /* Find out the maximum input size negotiated on this connection */
 955
 956 static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security)
 957 {
 958         struct gensec_gssapi_state *gensec_gssapi_state
 959                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 960         OM_uint32 maj_stat, min_stat;
 961         OM_uint32 max_input_size;
 962
 963         maj_stat = gss_wrap_size_limit(&min_stat,
 964                                        gensec_gssapi_state->gssapi_context,
 965                                        gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
 966                                        GSS_C_QOP_DEFAULT,
 967                                        gensec_gssapi_state->max_wrap_buf_size,
 968                                        &max_input_size);
 969         if (GSS_ERROR(maj_stat)) {
 970                 TALLOC_CTX *mem_ctx = talloc_new(NULL);
 971                 DEBUG(1, ("gensec_gssapi_max_input_size: determinaing signature size with gss_wrap_size_limit failed: %s\n",
 972                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 973                 talloc_free(mem_ctx);
 974                 return 0;
 975         }
 976
 977         return max_input_size;
 978 }
 979
 980 /* Find out the maximum output size negotiated on this connection */
 981 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security)
 982 {
 983         struct gensec_gssapi_state *gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);;
 984         return gensec_gssapi_state->max_wrap_buf_size;
 985 }
 986
 987 static NTSTATUS gensec_gssapi_seal_packet(struct gensec_security *gensec_security,
 988                                           TALLOC_CTX *mem_ctx,
 989                                           uint8_t *data, size_t length,
 990                                           const uint8_t *whole_pdu, size_t pdu_length,
 991                                           DATA_BLOB *sig)
 992 {
 993         struct gensec_gssapi_state *gensec_gssapi_state
 994                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 995         OM_uint32 maj_stat, min_stat;
 996         gss_buffer_desc input_token, output_token;
 997         int conf_state;
 998         ssize_t sig_length;
 999
1000         input_token.length = length;
1001         input_token.value = data;
1002
1003         maj_stat = gss_wrap(&min_stat,
1004                             gensec_gssapi_state->gssapi_context,
1005                             gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
1006                             GSS_C_QOP_DEFAULT,
1007                             &input_token,
1008                             &conf_state,
1009                             &output_token);
1010         if (GSS_ERROR(maj_stat)) {
1011                 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap failed: %s\n",
1012                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1013                 return NT_STATUS_ACCESS_DENIED;
1014         }
1015
1016         if (output_token.length < input_token.length) {
1017                 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap length [%ld] *less* than caller length [%ld]\n",
1018                           (long)output_token.length, (long)length));
1019                 return NT_STATUS_INTERNAL_ERROR;
1020         }
1021         sig_length = output_token.length - input_token.length;
1022
1023         memcpy(data, ((uint8_t *)output_token.value) + sig_length, length);
1024         *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);
1025
1026         dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1027         dump_data_pw("gensec_gssapi_seal_packet: clear\n", data, length);
1028         dump_data_pw("gensec_gssapi_seal_packet: sealed\n", ((uint8_t *)output_token.value) + sig_length, output_token.length - sig_length);
1029
1030         gss_release_buffer(&min_stat, &output_token);
1031
1032         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
1033             && !conf_state) {
1034                 return NT_STATUS_ACCESS_DENIED;
1035         }
1036         return NT_STATUS_OK;
1037 }
1038
1039 static NTSTATUS gensec_gssapi_unseal_packet(struct gensec_security *gensec_security,
1040                                             TALLOC_CTX *mem_ctx,
1041                                             uint8_t *data, size_t length,
1042                                             const uint8_t *whole_pdu, size_t pdu_length,
1043                                             const DATA_BLOB *sig)
1044 {
1045         struct gensec_gssapi_state *gensec_gssapi_state
1046                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1047         OM_uint32 maj_stat, min_stat;
1048         gss_buffer_desc input_token, output_token;
1049         int conf_state;
1050         gss_qop_t qop_state;
1051         DATA_BLOB in;
1052
1053         dump_data_pw("gensec_gssapi_unseal_packet: sig\n", sig->data, sig->length);
1054
1055         in = data_blob_talloc(mem_ctx, NULL, sig->length + length);
1056
1057         memcpy(in.data, sig->data, sig->length);
1058         memcpy(in.data + sig->length, data, length);
1059
1060         input_token.length = in.length;
1061         input_token.value = in.data;
1062
1063         maj_stat = gss_unwrap(&min_stat,
1064                               gensec_gssapi_state->gssapi_context,
1065                               &input_token,
1066                               &output_token,
1067                               &conf_state,
1068                               &qop_state);
1069         if (GSS_ERROR(maj_stat)) {
1070                 DEBUG(1, ("gensec_gssapi_unseal_packet: GSS UnWrap failed: %s\n",
1071                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1072                 return NT_STATUS_ACCESS_DENIED;
1073         }
1074
1075         if (output_token.length != length) {
1076                 return NT_STATUS_INTERNAL_ERROR;
1077         }
1078
1079         memcpy(data, output_token.value, length);
1080
1081         gss_release_buffer(&min_stat, &output_token);
1082
1083         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
1084             && !conf_state) {
1085                 return NT_STATUS_ACCESS_DENIED;
1086         }
1087         return NT_STATUS_OK;
1088 }
1089
1090 static NTSTATUS gensec_gssapi_sign_packet(struct gensec_security *gensec_security,
1091                                           TALLOC_CTX *mem_ctx,
1092                                           const uint8_t *data, size_t length,
1093                                           const uint8_t *whole_pdu, size_t pdu_length,
1094                                           DATA_BLOB *sig)
1095 {
1096         struct gensec_gssapi_state *gensec_gssapi_state
1097                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1098         OM_uint32 maj_stat, min_stat;
1099         gss_buffer_desc input_token, output_token;
1100
1101         if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1102                 input_token.length = pdu_length;
1103                 input_token.value = discard_const_p(uint8_t *, whole_pdu);
1104         } else {
1105                 input_token.length = length;
1106                 input_token.value = discard_const_p(uint8_t *, data);
1107         }
1108
1109         maj_stat = gss_get_mic(&min_stat,
1110                             gensec_gssapi_state->gssapi_context,
1111                             GSS_C_QOP_DEFAULT,
1112                             &input_token,
1113                             &output_token);
1114         if (GSS_ERROR(maj_stat)) {
1115                 DEBUG(1, ("GSS GetMic failed: %s\n",
1116                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1117                 return NT_STATUS_ACCESS_DENIED;
1118         }
1119
1120         *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, output_token.length);
1121
1122         dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1123
1124         gss_release_buffer(&min_stat, &output_token);
1125
1126         return NT_STATUS_OK;
1127 }
1128
1129 static NTSTATUS gensec_gssapi_check_packet(struct gensec_security *gensec_security,
1130                                            TALLOC_CTX *mem_ctx,
1131                                            const uint8_t *data, size_t length,
1132                                            const uint8_t *whole_pdu, size_t pdu_length,
1133                                            const DATA_BLOB *sig)
1134 {
1135         struct gensec_gssapi_state *gensec_gssapi_state
1136                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1137         OM_uint32 maj_stat, min_stat;
1138         gss_buffer_desc input_token;
1139         gss_buffer_desc input_message;
1140         gss_qop_t qop_state;
1141
1142         dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1143
1144         if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1145                 input_message.length = pdu_length;
1146                 input_message.value = discard_const(whole_pdu);
1147         } else {
1148                 input_message.length = length;
1149                 input_message.value = discard_const(data);
1150         }
1151
1152         input_token.length = sig->length;
1153         input_token.value = sig->data;
1154
1155         maj_stat = gss_verify_mic(&min_stat,
1156                               gensec_gssapi_state->gssapi_context,
1157                               &input_message,
1158                               &input_token,
1159                               &qop_state);
1160         if (GSS_ERROR(maj_stat)) {
1161                 DEBUG(1, ("GSS VerifyMic failed: %s\n",
1162                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1163                 return NT_STATUS_ACCESS_DENIED;
1164         }
1165
1166         return NT_STATUS_OK;
1167 }
1168
1169 /* Try to figure out what features we actually got on the connection */
1170 static bool gensec_gssapi_have_feature(struct gensec_security *gensec_security,
1171                                        uint32_t feature)
1172 {
1173         struct gensec_gssapi_state *gensec_gssapi_state
1174                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1175         if (feature & GENSEC_FEATURE_SIGN) {
1176                 /* If we are going GSSAPI SASL, then we honour the second negotiation */
1177                 if (gensec_gssapi_state->sasl
1178                     && gensec_gssapi_state->sasl_state == STAGE_DONE) {
1179                         return ((gensec_gssapi_state->sasl_protection & NEG_SIGN)
1180                                 && (gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG));
1181                 }
1182                 return gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG;
1183         }
1184         if (feature & GENSEC_FEATURE_SEAL) {
1185                 /* If we are going GSSAPI SASL, then we honour the second negotiation */
1186                 if (gensec_gssapi_state->sasl
1187                     && gensec_gssapi_state->sasl_state == STAGE_DONE) {
1188                         return ((gensec_gssapi_state->sasl_protection & NEG_SEAL)
1189                                  && (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG));
1190                 }
1191                 return gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG;
1192         }
1193         if (feature & GENSEC_FEATURE_SESSION_KEY) {
1194                 /* Only for GSSAPI/Krb5 */
1195                 if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
1196                         return true;
1197                 }
1198         }
1199         if (feature & GENSEC_FEATURE_DCE_STYLE) {
1200                 return gensec_gssapi_state->got_flags & GSS_C_DCE_STYLE;
1201         }
1202         if (feature & GENSEC_FEATURE_NEW_SPNEGO) {
1203                 NTSTATUS status;
1204
1205                 if (!(gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG)) {
1206                         return false;
1207                 }
1208
1209                 if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "force_new_spnego", false)) {
1210                         return true;
1211                 }
1212                 if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "disable_new_spnego", false)) {
1213                         return false;
1214                 }
1215
1216                 status = gensec_gssapi_init_lucid(gensec_gssapi_state);
1217                 if (!NT_STATUS_IS_OK(status)) {
1218                         return false;
1219                 }
1220
1221                 if (gensec_gssapi_state->lucid->protocol == 1) {
1222                         return true;
1223                 }
1224
1225                 return false;
1226         }
1227         /* We can always do async (rather than strict request/reply) packets.  */
1228         if (feature & GENSEC_FEATURE_ASYNC_REPLIES) {
1229                 return true;
1230         }
1231         return false;
1232 }
1233
1234 /*
1235  * Extract the 'sesssion key' needed by SMB signing and ncacn_np
1236  * (for encrypting some passwords).
1237  *
1238  * This breaks all the abstractions, but what do you expect...
1239  */
1240 static NTSTATUS gensec_gssapi_session_key(struct gensec_security *gensec_security,
1241                                           DATA_BLOB *session_key)
1242 {
1243         struct gensec_gssapi_state *gensec_gssapi_state
1244                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1245         OM_uint32 maj_stat, min_stat;
1246         krb5_keyblock *subkey;
1247
1248         if (gensec_gssapi_state->sasl_state != STAGE_DONE) {
1249                 return NT_STATUS_NO_USER_SESSION_KEY;
1250         }
1251
1252         if (gensec_gssapi_state->session_key.data) {
1253                 *session_key = gensec_gssapi_state->session_key;
1254                 return NT_STATUS_OK;
1255         }
1256
1257         maj_stat = gsskrb5_get_subkey(&min_stat,
1258                                       gensec_gssapi_state->gssapi_context,
1259                                       &subkey);
1260         if (maj_stat != 0) {
1261                 DEBUG(1, ("NO session key for this mech\n"));
1262                 return NT_STATUS_NO_USER_SESSION_KEY;
1263         }
1264
1265         DEBUG(10, ("Got KRB5 session key of length %d%s\n",
1266                    (int)KRB5_KEY_LENGTH(subkey),
1267                    (gensec_gssapi_state->sasl_state == STAGE_DONE)?" (done)":""));
1268         *session_key = data_blob_talloc(gensec_gssapi_state,
1269                                         KRB5_KEY_DATA(subkey), KRB5_KEY_LENGTH(subkey));
1270         krb5_free_keyblock(gensec_gssapi_state->smb_krb5_context->krb5_context, subkey);
1271         gensec_gssapi_state->session_key = *session_key;
1272         dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
1273
1274         return NT_STATUS_OK;
1275 }
1276
1277 /* Get some basic (and authorization) information about the user on
1278  * this session.  This uses either the PAC (if present) or a local
1279  * database lookup */
1280 static NTSTATUS gensec_gssapi_session_info(struct gensec_security *gensec_security,
1281                                            struct auth_session_info **_session_info)
1282 {
1283         NTSTATUS nt_status;
1284         TALLOC_CTX *mem_ctx;
1285         struct gensec_gssapi_state *gensec_gssapi_state
1286                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1287         struct auth_user_info_dc *user_info_dc = NULL;
1288         struct auth_session_info *session_info = NULL;
1289         OM_uint32 maj_stat, min_stat;
1290         DATA_BLOB pac_blob;
1291         struct PAC_SIGNATURE_DATA *pac_srv_sig = NULL;
1292         struct PAC_SIGNATURE_DATA *pac_kdc_sig = NULL;
1293
1294         if ((gensec_gssapi_state->gss_oid->length != gss_mech_krb5->length)
1295             || (memcmp(gensec_gssapi_state->gss_oid->elements, gss_mech_krb5->elements,
1296                        gensec_gssapi_state->gss_oid->length) != 0)) {
1297                 DEBUG(1, ("NO session info available for this mech\n"));
1298                 return NT_STATUS_INVALID_PARAMETER;
1299         }
1300
1301         mem_ctx = talloc_named(gensec_gssapi_state, 0, "gensec_gssapi_session_info context");
1302         NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
1303
1304         nt_status = gssapi_obtain_pac_blob(mem_ctx,  gensec_gssapi_state->gssapi_context,
1305                                            gensec_gssapi_state->client_name,
1306                                            &pac_blob);
1307
1308         /* IF we have the PAC - otherwise we need to get this
1309          * data from elsewere - local ldb, or (TODO) lookup of some
1310          * kind...
1311          */
1312         if (NT_STATUS_IS_OK(nt_status)) {
1313                 pac_srv_sig = talloc(mem_ctx, struct PAC_SIGNATURE_DATA);
1314                 if (!pac_srv_sig) {
1315                         talloc_free(mem_ctx);
1316                         return NT_STATUS_NO_MEMORY;
1317                 }
1318                 pac_kdc_sig = talloc(mem_ctx, struct PAC_SIGNATURE_DATA);
1319                 if (!pac_kdc_sig) {
1320                         talloc_free(mem_ctx);
1321                         return NT_STATUS_NO_MEMORY;
1322                 }
1323
1324                 nt_status = kerberos_pac_blob_to_user_info_dc(mem_ctx,
1325                                                               pac_blob,
1326                                                               gensec_gssapi_state->smb_krb5_context->krb5_context,
1327                                                               &user_info_dc,
1328                                                               pac_srv_sig,
1329                                                               pac_kdc_sig);
1330                 if (!NT_STATUS_IS_OK(nt_status)) {
1331                         talloc_free(mem_ctx);
1332                         return nt_status;
1333                 }
1334         } else {
1335                 gss_buffer_desc name_token;
1336                 char *principal_string;
1337
1338                 maj_stat = gss_display_name (&min_stat,
1339                                              gensec_gssapi_state->client_name,
1340                                              &name_token,
1341                                              NULL);
1342                 if (GSS_ERROR(maj_stat)) {
1343                         DEBUG(1, ("GSS display_name failed: %s\n",
1344                                   gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1345                         talloc_free(mem_ctx);
1346                         return NT_STATUS_FOOBAR;
1347                 }
1348
1349                 principal_string = talloc_strndup(mem_ctx,
1350                                                   (const char *)name_token.value,
1351                                                   name_token.length);
1352
1353                 gss_release_buffer(&min_stat, &name_token);
1354
1355                 if (!principal_string) {
1356                         talloc_free(mem_ctx);
1357                         return NT_STATUS_NO_MEMORY;
1358                 }
1359
1360                 if (gensec_security->auth_context &&
1361                     !gensec_setting_bool(gensec_security->settings, "gensec", "require_pac", false)) {
1362                         DEBUG(1, ("Unable to find PAC, resorting to local user lookup: %s\n",
1363                                   gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1364                         nt_status = gensec_security->auth_context->get_user_info_dc_principal(mem_ctx,
1365                                                                                              gensec_security->auth_context,
1366                                                                                              principal_string,
1367                                                                                              NULL,
1368                                                                                              &user_info_dc);
1369
1370                         if (!NT_STATUS_IS_OK(nt_status)) {
1371                                 talloc_free(mem_ctx);
1372                                 return nt_status;
1373                         }
1374                 } else {
1375                         DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access: %s\n",
1376                                   principal_string,
1377                                   gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1378                         return NT_STATUS_ACCESS_DENIED;
1379                 }
1380         }
1381
1382         /* references the user_info_dc into the session_info */
1383         nt_status = gensec_generate_session_info(mem_ctx, gensec_security,
1384                                                  user_info_dc, &session_info);
1385         if (!NT_STATUS_IS_OK(nt_status)) {
1386                 talloc_free(mem_ctx);
1387                 return nt_status;
1388         }
1389
1390         nt_status = gensec_gssapi_session_key(gensec_security, &session_info->session_key);
1391         if (!NT_STATUS_IS_OK(nt_status)) {
1392                 talloc_free(mem_ctx);
1393                 return nt_status;
1394         }
1395
1396         /* Allow torture tests to check the PAC signatures */
1397         if (session_info->torture) {
1398                 session_info->torture->pac_srv_sig = talloc_steal(session_info->torture, pac_srv_sig);
1399                 session_info->torture->pac_kdc_sig = talloc_steal(session_info->torture, pac_kdc_sig);
1400         }
1401
1402         if (!(gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG)) {
1403                 DEBUG(10, ("gensec_gssapi: NO delegated credentials supplied by client\n"));
1404         } else {
1405                 krb5_error_code ret;
1406                 const char *error_string;
1407
1408                 DEBUG(10, ("gensec_gssapi: delegated credentials supplied by client\n"));
1409                 session_info->credentials = cli_credentials_init(session_info);
1410                 if (!session_info->credentials) {
1411                         talloc_free(mem_ctx);
1412                         return NT_STATUS_NO_MEMORY;
1413                 }
1414
1415                 cli_credentials_set_conf(session_info->credentials, gensec_security->settings->lp_ctx);
1416                 /* Just so we don't segfault trying to get at a username */
1417                 cli_credentials_set_anonymous(session_info->credentials);
1418
1419                 ret = cli_credentials_set_client_gss_creds(session_info->credentials,
1420                                                            gensec_security->settings->lp_ctx,
1421                                                            gensec_gssapi_state->delegated_cred_handle,
1422                                                            CRED_SPECIFIED, &error_string);
1423                 if (ret) {
1424                         talloc_free(mem_ctx);
1425                         DEBUG(2,("Failed to get gss creds: %s\n", error_string));
1426                         return NT_STATUS_NO_MEMORY;
1427                 }
1428
1429                 /* This credential handle isn't useful for password authentication, so ensure nobody tries to do that */
1430                 cli_credentials_set_kerberos_state(session_info->credentials, CRED_MUST_USE_KERBEROS);
1431
1432                 /* It has been taken from this place... */
1433                 gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
1434         }
1435         talloc_steal(gensec_gssapi_state, session_info);
1436         talloc_free(mem_ctx);
1437         *_session_info = session_info;
1438
1439         return NT_STATUS_OK;
1440 }
1441
1442 static size_t gensec_gssapi_sig_size(struct gensec_security *gensec_security, size_t data_size)
1443 {
1444         struct gensec_gssapi_state *gensec_gssapi_state
1445                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1446         NTSTATUS status;
1447
1448         if (gensec_gssapi_state->sig_size) {
1449                 return gensec_gssapi_state->sig_size;
1450         }
1451
1452         if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1453                 gensec_gssapi_state->sig_size = 45;
1454         } else {
1455                 gensec_gssapi_state->sig_size = 37;
1456         }
1457
1458         status = gensec_gssapi_init_lucid(gensec_gssapi_state);
1459         if (!NT_STATUS_IS_OK(status)) {
1460                 return gensec_gssapi_state->sig_size;
1461         }
1462
1463         if (gensec_gssapi_state->lucid->protocol == 1) {
1464                 if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1465                         /*
1466                          * TODO: windows uses 76 here, but we don't know
1467                          *       gss_wrap works with aes keys yet
1468                          */
1469                         gensec_gssapi_state->sig_size = 76;
1470                 } else {
1471                         gensec_gssapi_state->sig_size = 28;
1472                 }
1473         } else if (gensec_gssapi_state->lucid->protocol == 0) {
1474                 switch (gensec_gssapi_state->lucid->rfc1964_kd.ctx_key.type) {
1475                 case KEYTYPE_DES:
1476                 case KEYTYPE_ARCFOUR:
1477                 case KEYTYPE_ARCFOUR_56:
1478                         if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1479                                 gensec_gssapi_state->sig_size = 45;
1480                         } else {
1481                                 gensec_gssapi_state->sig_size = 37;
1482                         }
1483                         break;
1484                 case KEYTYPE_DES3:
1485                         if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1486                                 gensec_gssapi_state->sig_size = 57;
1487                         } else {
1488                                 gensec_gssapi_state->sig_size = 49;
1489                         }
1490                         break;
1491                 }
1492         }
1493
1494         return gensec_gssapi_state->sig_size;
1495 }
1496
1497 static const char *gensec_gssapi_krb5_oids[] = {
1498         GENSEC_OID_KERBEROS5_OLD,
1499         GENSEC_OID_KERBEROS5,
1500         NULL
1501 };
1502
1503 static const char *gensec_gssapi_spnego_oids[] = {
1504         GENSEC_OID_SPNEGO,
1505         NULL
1506 };
1507
1508 /* As a server, this could in theory accept any GSSAPI mech */
1509 static const struct gensec_security_ops gensec_gssapi_spnego_security_ops = {
1510         .name           = "gssapi_spnego",
1511         .sasl_name      = "GSS-SPNEGO",
1512         .auth_type      = DCERPC_AUTH_TYPE_SPNEGO,
1513         .oid            = gensec_gssapi_spnego_oids,
1514         .client_start   = gensec_gssapi_client_start,
1515         .server_start   = gensec_gssapi_server_start,
1516         .magic          = gensec_gssapi_magic,
1517         .update         = gensec_gssapi_update,
1518         .session_key    = gensec_gssapi_session_key,
1519         .session_info   = gensec_gssapi_session_info,
1520         .sign_packet    = gensec_gssapi_sign_packet,
1521         .check_packet   = gensec_gssapi_check_packet,
1522         .seal_packet    = gensec_gssapi_seal_packet,
1523         .unseal_packet  = gensec_gssapi_unseal_packet,
1524         .wrap           = gensec_gssapi_wrap,
1525         .unwrap         = gensec_gssapi_unwrap,
1526         .have_feature   = gensec_gssapi_have_feature,
1527         .enabled        = false,
1528         .kerberos       = true,
1529         .priority       = GENSEC_GSSAPI
1530 };
1531
1532 /* As a server, this could in theory accept any GSSAPI mech */
1533 static const struct gensec_security_ops gensec_gssapi_krb5_security_ops = {
1534         .name           = "gssapi_krb5",
1535         .auth_type      = DCERPC_AUTH_TYPE_KRB5,
1536         .oid            = gensec_gssapi_krb5_oids,
1537         .client_start   = gensec_gssapi_client_start,
1538         .server_start   = gensec_gssapi_server_start,
1539         .magic          = gensec_gssapi_magic,
1540         .update         = gensec_gssapi_update,
1541         .session_key    = gensec_gssapi_session_key,
1542         .session_info   = gensec_gssapi_session_info,
1543         .sig_size       = gensec_gssapi_sig_size,
1544         .sign_packet    = gensec_gssapi_sign_packet,
1545         .check_packet   = gensec_gssapi_check_packet,
1546         .seal_packet    = gensec_gssapi_seal_packet,
1547         .unseal_packet  = gensec_gssapi_unseal_packet,
1548         .wrap           = gensec_gssapi_wrap,
1549         .unwrap         = gensec_gssapi_unwrap,
1550         .have_feature   = gensec_gssapi_have_feature,
1551         .enabled        = true,
1552         .kerberos       = true,
1553         .priority       = GENSEC_GSSAPI
1554 };
1555
1556 /* As a server, this could in theory accept any GSSAPI mech */
1557 static const struct gensec_security_ops gensec_gssapi_sasl_krb5_security_ops = {
1558         .name             = "gssapi_krb5_sasl",
1559         .sasl_name        = "GSSAPI",
1560         .client_start     = gensec_gssapi_sasl_client_start,
1561         .server_start     = gensec_gssapi_sasl_server_start,
1562         .update           = gensec_gssapi_update,
1563         .session_key      = gensec_gssapi_session_key,
1564         .session_info     = gensec_gssapi_session_info,
1565         .max_input_size   = gensec_gssapi_max_input_size,
1566         .max_wrapped_size = gensec_gssapi_max_wrapped_size,
1567         .wrap             = gensec_gssapi_wrap,
1568         .unwrap           = gensec_gssapi_unwrap,
1569         .have_feature     = gensec_gssapi_have_feature,
1570         .enabled          = true,
1571         .kerberos         = true,
1572         .priority         = GENSEC_GSSAPI
1573 };
1574
1575 _PUBLIC_ NTSTATUS gensec_gssapi_init(void)
1576 {
1577         NTSTATUS ret;
1578
1579         ret = gensec_register(&gensec_gssapi_spnego_security_ops);
1580         if (!NT_STATUS_IS_OK(ret)) {
1581                 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1582                         gensec_gssapi_spnego_security_ops.name));
1583                 return ret;
1584         }
1585
1586         ret = gensec_register(&gensec_gssapi_krb5_security_ops);
1587         if (!NT_STATUS_IS_OK(ret)) {
1588                 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1589                         gensec_gssapi_krb5_security_ops.name));
1590                 return ret;
1591         }
1592
1593         ret = gensec_register(&gensec_gssapi_sasl_krb5_security_ops);
1594         if (!NT_STATUS_IS_OK(ret)) {
1595                 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1596                         gensec_gssapi_sasl_krb5_security_ops.name));
1597                 return ret;
1598         }
1599
1600         return ret;
1601 }