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         gensec_gssapi_state->target_principal = gensec_get_target_principal(gensec_security);
 306         if (gensec_gssapi_state->target_principal) {
 307                 name_type = GSS_C_NULL_OID;
 308         } else {
 309                 gensec_gssapi_state->target_principal = talloc_asprintf(gensec_gssapi_state, "%s/%s@%s",
 310                                             gensec_get_target_service(gensec_security),
 311                                             hostname, lpcfg_realm(gensec_security->settings->lp_ctx));
 312
 313                 name_type = GSS_C_NT_USER_NAME;
 314         }
 315         name_token.value  = discard_const_p(uint8_t, gensec_gssapi_state->target_principal);
 316         name_token.length = strlen(gensec_gssapi_state->target_principal);
 317
 318
 319         maj_stat = gss_import_name (&min_stat,
 320                                     &name_token,
 321                                     name_type,
 322                                     &gensec_gssapi_state->server_name);
 323         if (maj_stat) {
 324                 DEBUG(2, ("GSS Import name of %s failed: %s\n",
 325                           (char *)name_token.value,
 326                           gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 327                 return NT_STATUS_INVALID_PARAMETER;
 328         }
 329
 330         ret = cli_credentials_get_client_gss_creds(creds,
 331                                                    gensec_security->event_ctx,
 332                                                    gensec_security->settings->lp_ctx, &gcc, &error_string);
 333         switch (ret) {
 334         case 0:
 335                 break;
 336         case KRB5KDC_ERR_PREAUTH_FAILED:
 337         case KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN:
 338                 DEBUG(1, ("Wrong username or password: %s\n", error_string));
 339                 return NT_STATUS_LOGON_FAILURE;
 340         case KRB5_KDC_UNREACH:
 341                 DEBUG(3, ("Cannot reach a KDC we require to contact %s : %s\n", gensec_gssapi_state->target_principal, error_string));
 342                 return NT_STATUS_NO_LOGON_SERVERS;
 343         case KRB5_CC_NOTFOUND:
 344         case KRB5_CC_END:
 345                 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));
 346                 return NT_STATUS_TIME_DIFFERENCE_AT_DC;
 347         default:
 348                 DEBUG(1, ("Aquiring initiator credentials failed: %s\n", error_string));
 349                 return NT_STATUS_UNSUCCESSFUL;
 350         }
 351
 352         gensec_gssapi_state->client_cred = gcc;
 353         if (!talloc_reference(gensec_gssapi_state, gcc)) {
 354                 return NT_STATUS_NO_MEMORY;
 355         }
 356
 357         return NT_STATUS_OK;
 358 }
 359
 360 static NTSTATUS gensec_gssapi_sasl_client_start(struct gensec_security *gensec_security)
 361 {
 362         NTSTATUS nt_status;
 363         struct gensec_gssapi_state *gensec_gssapi_state;
 364         nt_status = gensec_gssapi_client_start(gensec_security);
 365
 366         if (NT_STATUS_IS_OK(nt_status)) {
 367                 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 368                 gensec_gssapi_state->sasl = true;
 369         }
 370         return nt_status;
 371 }
 372
 373
 374 /**
 375  * Check if the packet is one for this mechansim
 376  *
 377  * @param gensec_security GENSEC state
 378  * @param in The request, as a DATA_BLOB
 379  * @return Error, INVALID_PARAMETER if it's not a packet for us
 380  *                or NT_STATUS_OK if the packet is ok.
 381  */
 382
 383 static NTSTATUS gensec_gssapi_magic(struct gensec_security *gensec_security,
 384                                     const DATA_BLOB *in)
 385 {
 386         if (gensec_gssapi_check_oid(in, GENSEC_OID_KERBEROS5)) {
 387                 return NT_STATUS_OK;
 388         } else {
 389                 return NT_STATUS_INVALID_PARAMETER;
 390         }
 391 }
 392
 393
 394 /**
 395  * Next state function for the GSSAPI GENSEC mechanism
 396  *
 397  * @param gensec_gssapi_state GSSAPI State
 398  * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
 399  * @param in The request, as a DATA_BLOB
 400  * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
 401  * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
 402  *                or NT_STATUS_OK if the user is authenticated.
 403  */
 404
 405 static NTSTATUS gensec_gssapi_update(struct gensec_security *gensec_security,
 406                                    TALLOC_CTX *out_mem_ctx,
 407                                    const DATA_BLOB in, DATA_BLOB *out)
 408 {
 409         struct gensec_gssapi_state *gensec_gssapi_state
 410                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 411         NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
 412         OM_uint32 maj_stat, min_stat;
 413         OM_uint32 min_stat2;
 414         gss_buffer_desc input_token, output_token;
 415         gss_OID gss_oid_p = NULL;
 416         input_token.length = in.length;
 417         input_token.value = in.data;
 418
 419         switch (gensec_gssapi_state->sasl_state) {
 420         case STAGE_GSS_NEG:
 421         {
 422                 switch (gensec_security->gensec_role) {
 423                 case GENSEC_CLIENT:
 424                 {
 425                         struct gsskrb5_send_to_kdc send_to_kdc;
 426                         krb5_error_code ret;
 427                         send_to_kdc.func = smb_krb5_send_and_recv_func;
 428                         send_to_kdc.ptr = gensec_security->event_ctx;
 429
 430                         min_stat = gsskrb5_set_send_to_kdc(&send_to_kdc);
 431                         if (min_stat) {
 432                                 DEBUG(1,("gensec_krb5_start: gsskrb5_set_send_to_kdc failed\n"));
 433                                 return NT_STATUS_INTERNAL_ERROR;
 434                         }
 435
 436                         maj_stat = gss_init_sec_context(&min_stat,
 437                                                         gensec_gssapi_state->client_cred->creds,
 438                                                         &gensec_gssapi_state->gssapi_context,
 439                                                         gensec_gssapi_state->server_name,
 440                                                         gensec_gssapi_state->gss_oid,
 441                                                         gensec_gssapi_state->want_flags,
 442                                                         0,
 443                                                         gensec_gssapi_state->input_chan_bindings,
 444                                                         &input_token,
 445                                                         &gss_oid_p,
 446                                                         &output_token,
 447                                                         &gensec_gssapi_state->got_flags, /* ret flags */
 448                                                         NULL);
 449                         if (gss_oid_p) {
 450                                 gensec_gssapi_state->gss_oid = gss_oid_p;
 451                         }
 452
 453                         send_to_kdc.func = smb_krb5_send_and_recv_func;
 454                         send_to_kdc.ptr = NULL;
 455
 456                         ret = gsskrb5_set_send_to_kdc(&send_to_kdc);
 457                         if (ret) {
 458                                 DEBUG(1,("gensec_krb5_start: gsskrb5_set_send_to_kdc failed\n"));
 459                                 return NT_STATUS_INTERNAL_ERROR;
 460                         }
 461
 462                         break;
 463                 }
 464                 case GENSEC_SERVER:
 465                 {
 466                         maj_stat = gss_accept_sec_context(&min_stat,
 467                                                           &gensec_gssapi_state->gssapi_context,
 468                                                           gensec_gssapi_state->server_cred->creds,
 469                                                           &input_token,
 470                                                           gensec_gssapi_state->input_chan_bindings,
 471                                                           &gensec_gssapi_state->client_name,
 472                                                           &gss_oid_p,
 473                                                           &output_token,
 474                                                           &gensec_gssapi_state->got_flags,
 475                                                           NULL,
 476                                                           &gensec_gssapi_state->delegated_cred_handle);
 477                         if (gss_oid_p) {
 478                                 gensec_gssapi_state->gss_oid = gss_oid_p;
 479                         }
 480                         break;
 481                 }
 482                 default:
 483                         return NT_STATUS_INVALID_PARAMETER;
 484
 485                 }
 486
 487                 gensec_gssapi_state->gss_exchange_count++;
 488
 489                 if (maj_stat == GSS_S_COMPLETE) {
 490                         *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
 491                         gss_release_buffer(&min_stat2, &output_token);
 492
 493                         if (gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG) {
 494                                 DEBUG(5, ("gensec_gssapi: credentials were delegated\n"));
 495                         } else {
 496                                 DEBUG(5, ("gensec_gssapi: NO credentials were delegated\n"));
 497                         }
 498
 499                         /* We may have been invoked as SASL, so there
 500                          * is more work to do */
 501                         if (gensec_gssapi_state->sasl) {
 502                                 gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_NEG;
 503                                 return NT_STATUS_MORE_PROCESSING_REQUIRED;
 504                         } else {
 505                                 gensec_gssapi_state->sasl_state = STAGE_DONE;
 506
 507                                 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 508                                         DEBUG(5, ("GSSAPI Connection will be cryptographically sealed\n"));
 509                                 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 510                                         DEBUG(5, ("GSSAPI Connection will be cryptographically signed\n"));
 511                                 } else {
 512                                         DEBUG(5, ("GSSAPI Connection will have no cryptographic protection\n"));
 513                                 }
 514
 515                                 return NT_STATUS_OK;
 516                         }
 517                 } else if (maj_stat == GSS_S_CONTINUE_NEEDED) {
 518                         *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
 519                         gss_release_buffer(&min_stat2, &output_token);
 520
 521                         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 522                 } else if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
 523                         switch (min_stat) {
 524                         case KRB5KRB_AP_ERR_TKT_NYV:
 525                                 DEBUG(1, ("Error with ticket to contact %s: possible clock skew between us and the KDC or target server: %s\n",
 526                                           gensec_gssapi_state->target_principal,
 527                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 528                                 return NT_STATUS_TIME_DIFFERENCE_AT_DC; /* Make SPNEGO ignore us, we can't go any further here */
 529                         case KRB5KRB_AP_ERR_TKT_EXPIRED:
 530                                 DEBUG(1, ("Error with ticket to contact %s: ticket is expired, possible clock skew between us and the KDC or target server: %s\n",
 531                                           gensec_gssapi_state->target_principal,
 532                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 533                                 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
 534                         case KRB5_KDC_UNREACH:
 535                                 DEBUG(3, ("Cannot reach a KDC we require in order to obtain a ticetk to %s: %s\n",
 536                                           gensec_gssapi_state->target_principal,
 537                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 538                                 return NT_STATUS_NO_LOGON_SERVERS; /* Make SPNEGO ignore us, we can't go any further here */
 539                         case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN:
 540                                 DEBUG(3, ("Server %s is not registered with our KDC: %s\n",
 541                                           gensec_gssapi_state->target_principal,
 542                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 543                                 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
 544                         case KRB5KRB_AP_ERR_MSG_TYPE:
 545                                 /* garbage input, possibly from the auto-mech detection */
 546                                 return NT_STATUS_INVALID_PARAMETER;
 547                         default:
 548                                 DEBUG(1, ("GSS %s Update(krb5)(%d) Update failed: %s\n",
 549                                           gensec_security->gensec_role == GENSEC_CLIENT ? "client" : "server",
 550                                           gensec_gssapi_state->gss_exchange_count,
 551                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 552                                 return nt_status;
 553                         }
 554                 } else {
 555                         DEBUG(1, ("GSS %s Update(%d) failed: %s\n",
 556                                   gensec_security->gensec_role == GENSEC_CLIENT ? "client" : "server",
 557                                   gensec_gssapi_state->gss_exchange_count,
 558                                   gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 559                         return nt_status;
 560                 }
 561                 break;
 562         }
 563
 564         /* These last two stages are only done if we were invoked as SASL */
 565         case STAGE_SASL_SSF_NEG:
 566         {
 567                 switch (gensec_security->gensec_role) {
 568                 case GENSEC_CLIENT:
 569                 {
 570                         uint8_t maxlength_proposed[4];
 571                         uint8_t maxlength_accepted[4];
 572                         uint8_t security_supported;
 573                         int conf_state;
 574                         gss_qop_t qop_state;
 575                         input_token.length = in.length;
 576                         input_token.value = in.data;
 577
 578                         /* As a client, we have just send a
 579                          * zero-length blob to the server (after the
 580                          * normal GSSAPI exchange), and it has replied
 581                          * with it's SASL negotiation */
 582
 583                         maj_stat = gss_unwrap(&min_stat,
 584                                               gensec_gssapi_state->gssapi_context,
 585                                               &input_token,
 586                                               &output_token,
 587                                               &conf_state,
 588                                               &qop_state);
 589                         if (GSS_ERROR(maj_stat)) {
 590                                 DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
 591                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 592                                 return NT_STATUS_ACCESS_DENIED;
 593                         }
 594
 595                         if (output_token.length < 4) {
 596                                 return NT_STATUS_INVALID_PARAMETER;
 597                         }
 598
 599                         memcpy(maxlength_proposed, output_token.value, 4);
 600                         gss_release_buffer(&min_stat, &output_token);
 601
 602                         /* first byte is the proposed security */
 603                         security_supported = maxlength_proposed[0];
 604                         maxlength_proposed[0] = '\0';
 605
 606                         /* Rest is the proposed max wrap length */
 607                         gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_proposed, 0),
 608                                                                      gensec_gssapi_state->max_wrap_buf_size);
 609                         gensec_gssapi_state->sasl_protection = 0;
 610                         if (security_supported & NEG_SEAL) {
 611                                 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 612                                         gensec_gssapi_state->sasl_protection |= NEG_SEAL;
 613                                 }
 614                         }
 615                         if (security_supported & NEG_SIGN) {
 616                                 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 617                                         gensec_gssapi_state->sasl_protection |= NEG_SIGN;
 618                                 }
 619                         }
 620                         if (security_supported & NEG_NONE) {
 621                                 gensec_gssapi_state->sasl_protection |= NEG_NONE;
 622                         }
 623                         if (gensec_gssapi_state->sasl_protection == 0) {
 624                                 DEBUG(1, ("Remote server does not support unprotected connections\n"));
 625                                 return NT_STATUS_ACCESS_DENIED;
 626                         }
 627
 628                         /* Send back the negotiated max length */
 629
 630                         RSIVAL(maxlength_accepted, 0, gensec_gssapi_state->max_wrap_buf_size);
 631
 632                         maxlength_accepted[0] = gensec_gssapi_state->sasl_protection;
 633
 634                         input_token.value = maxlength_accepted;
 635                         input_token.length = sizeof(maxlength_accepted);
 636
 637                         maj_stat = gss_wrap(&min_stat,
 638                                             gensec_gssapi_state->gssapi_context,
 639                                             false,
 640                                             GSS_C_QOP_DEFAULT,
 641                                             &input_token,
 642                                             &conf_state,
 643                                             &output_token);
 644                         if (GSS_ERROR(maj_stat)) {
 645                                 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
 646                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 647                                 return NT_STATUS_ACCESS_DENIED;
 648                         }
 649
 650                         *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
 651                         gss_release_buffer(&min_stat, &output_token);
 652
 653                         /* quirk:  This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
 654                         gensec_gssapi_state->sasl_state = STAGE_DONE;
 655
 656                         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 657                                 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographically sealed\n"));
 658                         } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 659                                 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographically signed\n"));
 660                         } else {
 661                                 DEBUG(3, ("SASL/GSSAPI Connection to server will have no cryptographically protection\n"));
 662                         }
 663
 664                         return NT_STATUS_OK;
 665                 }
 666                 case GENSEC_SERVER:
 667                 {
 668                         uint8_t maxlength_proposed[4];
 669                         uint8_t security_supported = 0x0;
 670                         int conf_state;
 671
 672                         /* As a server, we have just been sent a zero-length blob (note this, but it isn't fatal) */
 673                         if (in.length != 0) {
 674                                 DEBUG(1, ("SASL/GSSAPI: client sent non-zero length starting SASL negotiation!\n"));
 675                         }
 676
 677                         /* Give the client some idea what we will support */
 678
 679                         RSIVAL(maxlength_proposed, 0, gensec_gssapi_state->max_wrap_buf_size);
 680                         /* first byte is the proposed security */
 681                         maxlength_proposed[0] = '\0';
 682
 683                         gensec_gssapi_state->sasl_protection = 0;
 684                         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 685                                 security_supported |= NEG_SEAL;
 686                         }
 687                         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 688                                 security_supported |= NEG_SIGN;
 689                         }
 690                         if (security_supported == 0) {
 691                                 /* If we don't support anything, this must be 0 */
 692                                 RSIVAL(maxlength_proposed, 0, 0x0);
 693                         }
 694
 695                         /* TODO:  We may not wish to support this */
 696                         security_supported |= NEG_NONE;
 697                         maxlength_proposed[0] = security_supported;
 698
 699                         input_token.value = maxlength_proposed;
 700                         input_token.length = sizeof(maxlength_proposed);
 701
 702                         maj_stat = gss_wrap(&min_stat,
 703                                             gensec_gssapi_state->gssapi_context,
 704                                             false,
 705                                             GSS_C_QOP_DEFAULT,
 706                                             &input_token,
 707                                             &conf_state,
 708                                             &output_token);
 709                         if (GSS_ERROR(maj_stat)) {
 710                                 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
 711                                           gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 712                                 return NT_STATUS_ACCESS_DENIED;
 713                         }
 714
 715                         *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
 716                         gss_release_buffer(&min_stat, &output_token);
 717
 718                         gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_ACCEPT;
 719                         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 720                 }
 721                 default:
 722                         return NT_STATUS_INVALID_PARAMETER;
 723
 724                 }
 725         }
 726         /* This is s server-only stage */
 727         case STAGE_SASL_SSF_ACCEPT:
 728         {
 729                 uint8_t maxlength_accepted[4];
 730                 uint8_t security_accepted;
 731                 int conf_state;
 732                 gss_qop_t qop_state;
 733                 input_token.length = in.length;
 734                 input_token.value = in.data;
 735
 736                 maj_stat = gss_unwrap(&min_stat,
 737                                       gensec_gssapi_state->gssapi_context,
 738                                       &input_token,
 739                                       &output_token,
 740                                       &conf_state,
 741                                       &qop_state);
 742                 if (GSS_ERROR(maj_stat)) {
 743                         DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
 744                                   gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 745                         return NT_STATUS_ACCESS_DENIED;
 746                 }
 747
 748                 if (output_token.length < 4) {
 749                         return NT_STATUS_INVALID_PARAMETER;
 750                 }
 751
 752                 memcpy(maxlength_accepted, output_token.value, 4);
 753                 gss_release_buffer(&min_stat, &output_token);
 754
 755                 /* first byte is the proposed security */
 756                 security_accepted = maxlength_accepted[0];
 757                 maxlength_accepted[0] = '\0';
 758
 759                 /* Rest is the proposed max wrap length */
 760                 gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_accepted, 0),
 761                                                              gensec_gssapi_state->max_wrap_buf_size);
 762
 763                 gensec_gssapi_state->sasl_protection = 0;
 764                 if (security_accepted & NEG_SEAL) {
 765                         if (!gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 766                                 DEBUG(1, ("Remote client wanted seal, but gensec refused\n"));
 767                                 return NT_STATUS_ACCESS_DENIED;
 768                         }
 769                         gensec_gssapi_state->sasl_protection |= NEG_SEAL;
 770                 }
 771                 if (security_accepted & NEG_SIGN) {
 772                         if (!gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 773                                 DEBUG(1, ("Remote client wanted sign, but gensec refused\n"));
 774                                 return NT_STATUS_ACCESS_DENIED;
 775                         }
 776                         gensec_gssapi_state->sasl_protection |= NEG_SIGN;
 777                 }
 778                 if (security_accepted & NEG_NONE) {
 779                         gensec_gssapi_state->sasl_protection |= NEG_NONE;
 780                 }
 781
 782                 /* quirk:  This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
 783                 gensec_gssapi_state->sasl_state = STAGE_DONE;
 784                 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 785                         DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographically sealed\n"));
 786                 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 787                         DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographically signed\n"));
 788                 } else {
 789                         DEBUG(5, ("SASL/GSSAPI Connection from client will have no cryptographic protection\n"));
 790                 }
 791
 792                 *out = data_blob(NULL, 0);
 793                 return NT_STATUS_OK;
 794         }
 795         default:
 796                 return NT_STATUS_INVALID_PARAMETER;
 797         }
 798 }
 799
 800 static NTSTATUS gensec_gssapi_wrap(struct gensec_security *gensec_security,
 801                                    TALLOC_CTX *mem_ctx,
 802                                    const DATA_BLOB *in,
 803                                    DATA_BLOB *out)
 804 {
 805         struct gensec_gssapi_state *gensec_gssapi_state
 806                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 807         OM_uint32 maj_stat, min_stat;
 808         gss_buffer_desc input_token, output_token;
 809         int conf_state;
 810         input_token.length = in->length;
 811         input_token.value = in->data;
 812
 813         maj_stat = gss_wrap(&min_stat,
 814                             gensec_gssapi_state->gssapi_context,
 815                             gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
 816                             GSS_C_QOP_DEFAULT,
 817                             &input_token,
 818                             &conf_state,
 819                             &output_token);
 820         if (GSS_ERROR(maj_stat)) {
 821                 DEBUG(1, ("gensec_gssapi_wrap: GSS Wrap failed: %s\n",
 822                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 823                 return NT_STATUS_ACCESS_DENIED;
 824         }
 825
 826         *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
 827         gss_release_buffer(&min_stat, &output_token);
 828
 829         if (gensec_gssapi_state->sasl) {
 830                 size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
 831                 if (max_wrapped_size < out->length) {
 832                         DEBUG(1, ("gensec_gssapi_wrap: when wrapped, INPUT data (%u) is grew to be larger than SASL negotiated maximum output size (%u > %u)\n",
 833                                   (unsigned)in->length,
 834                                   (unsigned)out->length,
 835                                   (unsigned int)max_wrapped_size));
 836                         return NT_STATUS_INVALID_PARAMETER;
 837                 }
 838         }
 839
 840         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
 841             && !conf_state) {
 842                 return NT_STATUS_ACCESS_DENIED;
 843         }
 844         return NT_STATUS_OK;
 845 }
 846
 847 static NTSTATUS gensec_gssapi_unwrap(struct gensec_security *gensec_security,
 848                                      TALLOC_CTX *mem_ctx,
 849                                      const DATA_BLOB *in,
 850                                      DATA_BLOB *out)
 851 {
 852         struct gensec_gssapi_state *gensec_gssapi_state
 853                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 854         OM_uint32 maj_stat, min_stat;
 855         gss_buffer_desc input_token, output_token;
 856         int conf_state;
 857         gss_qop_t qop_state;
 858         input_token.length = in->length;
 859         input_token.value = in->data;
 860
 861         if (gensec_gssapi_state->sasl) {
 862                 size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
 863                 if (max_wrapped_size < in->length) {
 864                         DEBUG(1, ("gensec_gssapi_unwrap: WRAPPED data is larger than SASL negotiated maximum size\n"));
 865                         return NT_STATUS_INVALID_PARAMETER;
 866                 }
 867         }
 868
 869         maj_stat = gss_unwrap(&min_stat,
 870                               gensec_gssapi_state->gssapi_context,
 871                               &input_token,
 872                               &output_token,
 873                               &conf_state,
 874                               &qop_state);
 875         if (GSS_ERROR(maj_stat)) {
 876                 DEBUG(1, ("gensec_gssapi_unwrap: GSS UnWrap failed: %s\n",
 877                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 878                 return NT_STATUS_ACCESS_DENIED;
 879         }
 880
 881         *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
 882         gss_release_buffer(&min_stat, &output_token);
 883
 884         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
 885             && !conf_state) {
 886                 return NT_STATUS_ACCESS_DENIED;
 887         }
 888         return NT_STATUS_OK;
 889 }
 890
 891 /* Find out the maximum input size negotiated on this connection */
 892
 893 static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security)
 894 {
 895         struct gensec_gssapi_state *gensec_gssapi_state
 896                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 897         OM_uint32 maj_stat, min_stat;
 898         OM_uint32 max_input_size;
 899
 900         maj_stat = gss_wrap_size_limit(&min_stat,
 901                                        gensec_gssapi_state->gssapi_context,
 902                                        gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
 903                                        GSS_C_QOP_DEFAULT,
 904                                        gensec_gssapi_state->max_wrap_buf_size,
 905                                        &max_input_size);
 906         if (GSS_ERROR(maj_stat)) {
 907                 TALLOC_CTX *mem_ctx = talloc_new(NULL);
 908                 DEBUG(1, ("gensec_gssapi_max_input_size: determinaing signature size with gss_wrap_size_limit failed: %s\n",
 909                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 910                 talloc_free(mem_ctx);
 911                 return 0;
 912         }
 913
 914         return max_input_size;
 915 }
 916
 917 /* Find out the maximum output size negotiated on this connection */
 918 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security)
 919 {
 920         struct gensec_gssapi_state *gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);;
 921         return gensec_gssapi_state->max_wrap_buf_size;
 922 }
 923
 924 static NTSTATUS gensec_gssapi_seal_packet(struct gensec_security *gensec_security,
 925                                           TALLOC_CTX *mem_ctx,
 926                                           uint8_t *data, size_t length,
 927                                           const uint8_t *whole_pdu, size_t pdu_length,
 928                                           DATA_BLOB *sig)
 929 {
 930         struct gensec_gssapi_state *gensec_gssapi_state
 931                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 932         OM_uint32 maj_stat, min_stat;
 933         gss_buffer_desc input_token, output_token;
 934         int conf_state;
 935         ssize_t sig_length;
 936
 937         input_token.length = length;
 938         input_token.value = data;
 939
 940         maj_stat = gss_wrap(&min_stat,
 941                             gensec_gssapi_state->gssapi_context,
 942                             gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
 943                             GSS_C_QOP_DEFAULT,
 944                             &input_token,
 945                             &conf_state,
 946                             &output_token);
 947         if (GSS_ERROR(maj_stat)) {
 948                 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap failed: %s\n",
 949                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
 950                 return NT_STATUS_ACCESS_DENIED;
 951         }
 952
 953         if (output_token.length < input_token.length) {
 954                 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap length [%ld] *less* than caller length [%ld]\n",
 955                           (long)output_token.length, (long)length));
 956                 return NT_STATUS_INTERNAL_ERROR;
 957         }
 958         sig_length = output_token.length - input_token.length;
 959
 960         memcpy(data, ((uint8_t *)output_token.value) + sig_length, length);
 961         *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);
 962
 963         dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
 964         dump_data_pw("gensec_gssapi_seal_packet: clear\n", data, length);
 965         dump_data_pw("gensec_gssapi_seal_packet: sealed\n", ((uint8_t *)output_token.value) + sig_length, output_token.length - sig_length);
 966
 967         gss_release_buffer(&min_stat, &output_token);
 968
 969         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
 970             && !conf_state) {
 971                 return NT_STATUS_ACCESS_DENIED;
 972         }
 973         return NT_STATUS_OK;
 974 }
 975
 976 static NTSTATUS gensec_gssapi_unseal_packet(struct gensec_security *gensec_security,
 977                                             TALLOC_CTX *mem_ctx,
 978                                             uint8_t *data, size_t length,
 979                                             const uint8_t *whole_pdu, size_t pdu_length,
 980                                             const DATA_BLOB *sig)
 981 {
 982         struct gensec_gssapi_state *gensec_gssapi_state
 983                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
 984         OM_uint32 maj_stat, min_stat;
 985         gss_buffer_desc input_token, output_token;
 986         int conf_state;
 987         gss_qop_t qop_state;
 988         DATA_BLOB in;
 989
 990         dump_data_pw("gensec_gssapi_unseal_packet: sig\n", sig->data, sig->length);
 991
 992         in = data_blob_talloc(mem_ctx, NULL, sig->length + length);
 993
 994         memcpy(in.data, sig->data, sig->length);
 995         memcpy(in.data + sig->length, data, length);
 996
 997         input_token.length = in.length;
 998         input_token.value = in.data;
 999
1000         maj_stat = gss_unwrap(&min_stat,
1001                               gensec_gssapi_state->gssapi_context,
1002                               &input_token,
1003                               &output_token,
1004                               &conf_state,
1005                               &qop_state);
1006         if (GSS_ERROR(maj_stat)) {
1007                 DEBUG(1, ("gensec_gssapi_unseal_packet: GSS UnWrap failed: %s\n",
1008                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1009                 return NT_STATUS_ACCESS_DENIED;
1010         }
1011
1012         if (output_token.length != length) {
1013                 return NT_STATUS_INTERNAL_ERROR;
1014         }
1015
1016         memcpy(data, output_token.value, length);
1017
1018         gss_release_buffer(&min_stat, &output_token);
1019
1020         if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
1021             && !conf_state) {
1022                 return NT_STATUS_ACCESS_DENIED;
1023         }
1024         return NT_STATUS_OK;
1025 }
1026
1027 static NTSTATUS gensec_gssapi_sign_packet(struct gensec_security *gensec_security,
1028                                           TALLOC_CTX *mem_ctx,
1029                                           const uint8_t *data, size_t length,
1030                                           const uint8_t *whole_pdu, size_t pdu_length,
1031                                           DATA_BLOB *sig)
1032 {
1033         struct gensec_gssapi_state *gensec_gssapi_state
1034                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1035         OM_uint32 maj_stat, min_stat;
1036         gss_buffer_desc input_token, output_token;
1037
1038         if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1039                 input_token.length = pdu_length;
1040                 input_token.value = discard_const_p(uint8_t *, whole_pdu);
1041         } else {
1042                 input_token.length = length;
1043                 input_token.value = discard_const_p(uint8_t *, data);
1044         }
1045
1046         maj_stat = gss_get_mic(&min_stat,
1047                             gensec_gssapi_state->gssapi_context,
1048                             GSS_C_QOP_DEFAULT,
1049                             &input_token,
1050                             &output_token);
1051         if (GSS_ERROR(maj_stat)) {
1052                 DEBUG(1, ("GSS GetMic failed: %s\n",
1053                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1054                 return NT_STATUS_ACCESS_DENIED;
1055         }
1056
1057         *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, output_token.length);
1058
1059         dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1060
1061         gss_release_buffer(&min_stat, &output_token);
1062
1063         return NT_STATUS_OK;
1064 }
1065
1066 static NTSTATUS gensec_gssapi_check_packet(struct gensec_security *gensec_security,
1067                                            TALLOC_CTX *mem_ctx,
1068                                            const uint8_t *data, size_t length,
1069                                            const uint8_t *whole_pdu, size_t pdu_length,
1070                                            const DATA_BLOB *sig)
1071 {
1072         struct gensec_gssapi_state *gensec_gssapi_state
1073                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1074         OM_uint32 maj_stat, min_stat;
1075         gss_buffer_desc input_token;
1076         gss_buffer_desc input_message;
1077         gss_qop_t qop_state;
1078
1079         dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1080
1081         if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1082                 input_message.length = pdu_length;
1083                 input_message.value = discard_const(whole_pdu);
1084         } else {
1085                 input_message.length = length;
1086                 input_message.value = discard_const(data);
1087         }
1088
1089         input_token.length = sig->length;
1090         input_token.value = sig->data;
1091
1092         maj_stat = gss_verify_mic(&min_stat,
1093                               gensec_gssapi_state->gssapi_context,
1094                               &input_message,
1095                               &input_token,
1096                               &qop_state);
1097         if (GSS_ERROR(maj_stat)) {
1098                 DEBUG(1, ("GSS VerifyMic failed: %s\n",
1099                           gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1100                 return NT_STATUS_ACCESS_DENIED;
1101         }
1102
1103         return NT_STATUS_OK;
1104 }
1105
1106 /* Try to figure out what features we actually got on the connection */
1107 static bool gensec_gssapi_have_feature(struct gensec_security *gensec_security,
1108                                        uint32_t feature)
1109 {
1110         struct gensec_gssapi_state *gensec_gssapi_state
1111                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1112         if (feature & GENSEC_FEATURE_SIGN) {
1113                 /* If we are going GSSAPI SASL, then we honour the second negotiation */
1114                 if (gensec_gssapi_state->sasl
1115                     && gensec_gssapi_state->sasl_state == STAGE_DONE) {
1116                         return ((gensec_gssapi_state->sasl_protection & NEG_SIGN)
1117                                 && (gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG));
1118                 }
1119                 return gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG;
1120         }
1121         if (feature & GENSEC_FEATURE_SEAL) {
1122                 /* If we are going GSSAPI SASL, then we honour the second negotiation */
1123                 if (gensec_gssapi_state->sasl
1124                     && gensec_gssapi_state->sasl_state == STAGE_DONE) {
1125                         return ((gensec_gssapi_state->sasl_protection & NEG_SEAL)
1126                                  && (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG));
1127                 }
1128                 return gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG;
1129         }
1130         if (feature & GENSEC_FEATURE_SESSION_KEY) {
1131                 /* Only for GSSAPI/Krb5 */
1132                 if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
1133                         return true;
1134                 }
1135         }
1136         if (feature & GENSEC_FEATURE_DCE_STYLE) {
1137                 return gensec_gssapi_state->got_flags & GSS_C_DCE_STYLE;
1138         }
1139         if (feature & GENSEC_FEATURE_NEW_SPNEGO) {
1140                 NTSTATUS status;
1141
1142                 if (!(gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG)) {
1143                         return false;
1144                 }
1145
1146                 if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "force_new_spnego", false)) {
1147                         return true;
1148                 }
1149                 if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "disable_new_spnego", false)) {
1150                         return false;
1151                 }
1152
1153                 status = gensec_gssapi_init_lucid(gensec_gssapi_state);
1154                 if (!NT_STATUS_IS_OK(status)) {
1155                         return false;
1156                 }
1157
1158                 if (gensec_gssapi_state->lucid->protocol == 1) {
1159                         return true;
1160                 }
1161
1162                 return false;
1163         }
1164         /* We can always do async (rather than strict request/reply) packets.  */
1165         if (feature & GENSEC_FEATURE_ASYNC_REPLIES) {
1166                 return true;
1167         }
1168         return false;
1169 }
1170
1171 /*
1172  * Extract the 'sesssion key' needed by SMB signing and ncacn_np
1173  * (for encrypting some passwords).
1174  *
1175  * This breaks all the abstractions, but what do you expect...
1176  */
1177 static NTSTATUS gensec_gssapi_session_key(struct gensec_security *gensec_security,
1178                                           DATA_BLOB *session_key)
1179 {
1180         struct gensec_gssapi_state *gensec_gssapi_state
1181                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1182         OM_uint32 maj_stat, min_stat;
1183         krb5_keyblock *subkey;
1184
1185         if (gensec_gssapi_state->sasl_state != STAGE_DONE) {
1186                 return NT_STATUS_NO_USER_SESSION_KEY;
1187         }
1188
1189         if (gensec_gssapi_state->session_key.data) {
1190                 *session_key = gensec_gssapi_state->session_key;
1191                 return NT_STATUS_OK;
1192         }
1193
1194         maj_stat = gsskrb5_get_subkey(&min_stat,
1195                                       gensec_gssapi_state->gssapi_context,
1196                                       &subkey);
1197         if (maj_stat != 0) {
1198                 DEBUG(1, ("NO session key for this mech\n"));
1199                 return NT_STATUS_NO_USER_SESSION_KEY;
1200         }
1201
1202         DEBUG(10, ("Got KRB5 session key of length %d%s\n",
1203                    (int)KRB5_KEY_LENGTH(subkey),
1204                    (gensec_gssapi_state->sasl_state == STAGE_DONE)?" (done)":""));
1205         *session_key = data_blob_talloc(gensec_gssapi_state,
1206                                         KRB5_KEY_DATA(subkey), KRB5_KEY_LENGTH(subkey));
1207         krb5_free_keyblock(gensec_gssapi_state->smb_krb5_context->krb5_context, subkey);
1208         gensec_gssapi_state->session_key = *session_key;
1209         dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
1210
1211         return NT_STATUS_OK;
1212 }
1213
1214 /* Get some basic (and authorization) information about the user on
1215  * this session.  This uses either the PAC (if present) or a local
1216  * database lookup */
1217 static NTSTATUS gensec_gssapi_session_info(struct gensec_security *gensec_security,
1218                                            struct auth_session_info **_session_info)
1219 {
1220         NTSTATUS nt_status;
1221         TALLOC_CTX *mem_ctx;
1222         struct gensec_gssapi_state *gensec_gssapi_state
1223                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1224         struct auth_user_info_dc *user_info_dc = NULL;
1225         struct auth_session_info *session_info = NULL;
1226         OM_uint32 maj_stat, min_stat;
1227         gss_buffer_desc pac;
1228         DATA_BLOB pac_blob;
1229         struct PAC_SIGNATURE_DATA *pac_srv_sig = NULL;
1230         struct PAC_SIGNATURE_DATA *pac_kdc_sig = NULL;
1231
1232         if ((gensec_gssapi_state->gss_oid->length != gss_mech_krb5->length)
1233             || (memcmp(gensec_gssapi_state->gss_oid->elements, gss_mech_krb5->elements,
1234                        gensec_gssapi_state->gss_oid->length) != 0)) {
1235                 DEBUG(1, ("NO session info available for this mech\n"));
1236                 return NT_STATUS_INVALID_PARAMETER;
1237         }
1238
1239         mem_ctx = talloc_named(gensec_gssapi_state, 0, "gensec_gssapi_session_info context");
1240         NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
1241
1242         maj_stat = gsskrb5_extract_authz_data_from_sec_context(&min_stat,
1243                                                                gensec_gssapi_state->gssapi_context,
1244                                                                KRB5_AUTHDATA_WIN2K_PAC,
1245                                                                &pac);
1246
1247
1248         if (maj_stat == 0) {
1249                 pac_blob = data_blob_talloc(mem_ctx, pac.value, pac.length);
1250                 gss_release_buffer(&min_stat, &pac);
1251
1252         } else {
1253                 pac_blob = data_blob(NULL, 0);
1254         }
1255
1256         /* IF we have the PAC - otherwise we need to get this
1257          * data from elsewere - local ldb, or (TODO) lookup of some
1258          * kind...
1259          */
1260         if (pac_blob.length) {
1261                 pac_srv_sig = talloc(mem_ctx, struct PAC_SIGNATURE_DATA);
1262                 if (!pac_srv_sig) {
1263                         talloc_free(mem_ctx);
1264                         return NT_STATUS_NO_MEMORY;
1265                 }
1266                 pac_kdc_sig = talloc(mem_ctx, struct PAC_SIGNATURE_DATA);
1267                 if (!pac_kdc_sig) {
1268                         talloc_free(mem_ctx);
1269                         return NT_STATUS_NO_MEMORY;
1270                 }
1271
1272                 nt_status = kerberos_pac_blob_to_user_info_dc(mem_ctx,
1273                                                               pac_blob,
1274                                                               gensec_gssapi_state->smb_krb5_context->krb5_context,
1275                                                               &user_info_dc,
1276                                                               pac_srv_sig,
1277                                                               pac_kdc_sig);
1278                 if (!NT_STATUS_IS_OK(nt_status)) {
1279                         talloc_free(mem_ctx);
1280                         return nt_status;
1281                 }
1282         } else {
1283                 gss_buffer_desc name_token;
1284                 char *principal_string;
1285
1286                 maj_stat = gss_display_name (&min_stat,
1287                                              gensec_gssapi_state->client_name,
1288                                              &name_token,
1289                                              NULL);
1290                 if (GSS_ERROR(maj_stat)) {
1291                         DEBUG(1, ("GSS display_name failed: %s\n",
1292                                   gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1293                         talloc_free(mem_ctx);
1294                         return NT_STATUS_FOOBAR;
1295                 }
1296
1297                 principal_string = talloc_strndup(mem_ctx,
1298                                                   (const char *)name_token.value,
1299                                                   name_token.length);
1300
1301                 gss_release_buffer(&min_stat, &name_token);
1302
1303                 if (!principal_string) {
1304                         talloc_free(mem_ctx);
1305                         return NT_STATUS_NO_MEMORY;
1306                 }
1307
1308                 if (gensec_security->auth_context &&
1309                     !gensec_setting_bool(gensec_security->settings, "gensec", "require_pac", false)) {
1310                         DEBUG(1, ("Unable to find PAC, resorting to local user lookup: %s\n",
1311                                   gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1312                         nt_status = gensec_security->auth_context->get_user_info_dc_principal(mem_ctx,
1313                                                                                              gensec_security->auth_context,
1314                                                                                              principal_string,
1315                                                                                              NULL,
1316                                                                                              &user_info_dc);
1317
1318                         if (!NT_STATUS_IS_OK(nt_status)) {
1319                                 talloc_free(mem_ctx);
1320                                 return nt_status;
1321                         }
1322                 } else {
1323                         DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access: %s\n",
1324                                   principal_string,
1325                                   gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1326                         return NT_STATUS_ACCESS_DENIED;
1327                 }
1328         }
1329
1330         /* references the user_info_dc into the session_info */
1331         nt_status = gensec_generate_session_info(mem_ctx, gensec_security,
1332                                                  user_info_dc, &session_info);
1333         if (!NT_STATUS_IS_OK(nt_status)) {
1334                 talloc_free(mem_ctx);
1335                 return nt_status;
1336         }
1337
1338         nt_status = gensec_gssapi_session_key(gensec_security, &session_info->session_key);
1339         if (!NT_STATUS_IS_OK(nt_status)) {
1340                 talloc_free(mem_ctx);
1341                 return nt_status;
1342         }
1343
1344         /* Allow torture tests to check the PAC signatures */
1345         if (session_info->torture) {
1346                 session_info->torture->pac_srv_sig = talloc_steal(session_info->torture, pac_srv_sig);
1347                 session_info->torture->pac_kdc_sig = talloc_steal(session_info->torture, pac_kdc_sig);
1348         }
1349
1350         if (!(gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG)) {
1351                 DEBUG(10, ("gensec_gssapi: NO delegated credentials supplied by client\n"));
1352         } else {
1353                 krb5_error_code ret;
1354                 const char *error_string;
1355
1356                 DEBUG(10, ("gensec_gssapi: delegated credentials supplied by client\n"));
1357                 session_info->credentials = cli_credentials_init(session_info);
1358                 if (!session_info->credentials) {
1359                         talloc_free(mem_ctx);
1360                         return NT_STATUS_NO_MEMORY;
1361                 }
1362
1363                 cli_credentials_set_conf(session_info->credentials, gensec_security->settings->lp_ctx);
1364                 /* Just so we don't segfault trying to get at a username */
1365                 cli_credentials_set_anonymous(session_info->credentials);
1366
1367                 ret = cli_credentials_set_client_gss_creds(session_info->credentials,
1368                                                            gensec_security->settings->lp_ctx,
1369                                                            gensec_gssapi_state->delegated_cred_handle,
1370                                                            CRED_SPECIFIED, &error_string);
1371                 if (ret) {
1372                         talloc_free(mem_ctx);
1373                         DEBUG(2,("Failed to get gss creds: %s\n", error_string));
1374                         return NT_STATUS_NO_MEMORY;
1375                 }
1376
1377                 /* This credential handle isn't useful for password authentication, so ensure nobody tries to do that */
1378                 cli_credentials_set_kerberos_state(session_info->credentials, CRED_MUST_USE_KERBEROS);
1379
1380                 /* It has been taken from this place... */
1381                 gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
1382         }
1383         talloc_steal(gensec_gssapi_state, session_info);
1384         talloc_free(mem_ctx);
1385         *_session_info = session_info;
1386
1387         return NT_STATUS_OK;
1388 }
1389
1390 static size_t gensec_gssapi_sig_size(struct gensec_security *gensec_security, size_t data_size)
1391 {
1392         struct gensec_gssapi_state *gensec_gssapi_state
1393                 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1394         NTSTATUS status;
1395
1396         if (gensec_gssapi_state->sig_size) {
1397                 return gensec_gssapi_state->sig_size;
1398         }
1399
1400         if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1401                 gensec_gssapi_state->sig_size = 45;
1402         } else {
1403                 gensec_gssapi_state->sig_size = 37;
1404         }
1405
1406         status = gensec_gssapi_init_lucid(gensec_gssapi_state);
1407         if (!NT_STATUS_IS_OK(status)) {
1408                 return gensec_gssapi_state->sig_size;
1409         }
1410
1411         if (gensec_gssapi_state->lucid->protocol == 1) {
1412                 if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1413                         /*
1414                          * TODO: windows uses 76 here, but we don't know
1415                          *       gss_wrap works with aes keys yet
1416                          */
1417                         gensec_gssapi_state->sig_size = 76;
1418                 } else {
1419                         gensec_gssapi_state->sig_size = 28;
1420                 }
1421         } else if (gensec_gssapi_state->lucid->protocol == 0) {
1422                 switch (gensec_gssapi_state->lucid->rfc1964_kd.ctx_key.type) {
1423                 case KEYTYPE_DES:
1424                 case KEYTYPE_ARCFOUR:
1425                 case KEYTYPE_ARCFOUR_56:
1426                         if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1427                                 gensec_gssapi_state->sig_size = 45;
1428                         } else {
1429                                 gensec_gssapi_state->sig_size = 37;
1430                         }
1431                         break;
1432                 case KEYTYPE_DES3:
1433                         if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1434                                 gensec_gssapi_state->sig_size = 57;
1435                         } else {
1436                                 gensec_gssapi_state->sig_size = 49;
1437                         }
1438                         break;
1439                 }
1440         }
1441
1442         return gensec_gssapi_state->sig_size;
1443 }
1444
1445 static const char *gensec_gssapi_krb5_oids[] = {
1446         GENSEC_OID_KERBEROS5_OLD,
1447         GENSEC_OID_KERBEROS5,
1448         NULL
1449 };
1450
1451 static const char *gensec_gssapi_spnego_oids[] = {
1452         GENSEC_OID_SPNEGO,
1453         NULL
1454 };
1455
1456 /* As a server, this could in theory accept any GSSAPI mech */
1457 static const struct gensec_security_ops gensec_gssapi_spnego_security_ops = {
1458         .name           = "gssapi_spnego",
1459         .sasl_name      = "GSS-SPNEGO",
1460         .auth_type      = DCERPC_AUTH_TYPE_SPNEGO,
1461         .oid            = gensec_gssapi_spnego_oids,
1462         .client_start   = gensec_gssapi_client_start,
1463         .server_start   = gensec_gssapi_server_start,
1464         .magic          = gensec_gssapi_magic,
1465         .update         = gensec_gssapi_update,
1466         .session_key    = gensec_gssapi_session_key,
1467         .session_info   = gensec_gssapi_session_info,
1468         .sign_packet    = gensec_gssapi_sign_packet,
1469         .check_packet   = gensec_gssapi_check_packet,
1470         .seal_packet    = gensec_gssapi_seal_packet,
1471         .unseal_packet  = gensec_gssapi_unseal_packet,
1472         .wrap           = gensec_gssapi_wrap,
1473         .unwrap         = gensec_gssapi_unwrap,
1474         .have_feature   = gensec_gssapi_have_feature,
1475         .enabled        = false,
1476         .kerberos       = true,
1477         .priority       = GENSEC_GSSAPI
1478 };
1479
1480 /* As a server, this could in theory accept any GSSAPI mech */
1481 static const struct gensec_security_ops gensec_gssapi_krb5_security_ops = {
1482         .name           = "gssapi_krb5",
1483         .auth_type      = DCERPC_AUTH_TYPE_KRB5,
1484         .oid            = gensec_gssapi_krb5_oids,
1485         .client_start   = gensec_gssapi_client_start,
1486         .server_start   = gensec_gssapi_server_start,
1487         .magic          = gensec_gssapi_magic,
1488         .update         = gensec_gssapi_update,
1489         .session_key    = gensec_gssapi_session_key,
1490         .session_info   = gensec_gssapi_session_info,
1491         .sig_size       = gensec_gssapi_sig_size,
1492         .sign_packet    = gensec_gssapi_sign_packet,
1493         .check_packet   = gensec_gssapi_check_packet,
1494         .seal_packet    = gensec_gssapi_seal_packet,
1495         .unseal_packet  = gensec_gssapi_unseal_packet,
1496         .wrap           = gensec_gssapi_wrap,
1497         .unwrap         = gensec_gssapi_unwrap,
1498         .have_feature   = gensec_gssapi_have_feature,
1499         .enabled        = true,
1500         .kerberos       = true,
1501         .priority       = GENSEC_GSSAPI
1502 };
1503
1504 /* As a server, this could in theory accept any GSSAPI mech */
1505 static const struct gensec_security_ops gensec_gssapi_sasl_krb5_security_ops = {
1506         .name             = "gssapi_krb5_sasl",
1507         .sasl_name        = "GSSAPI",
1508         .client_start     = gensec_gssapi_sasl_client_start,
1509         .server_start     = gensec_gssapi_sasl_server_start,
1510         .update           = gensec_gssapi_update,
1511         .session_key      = gensec_gssapi_session_key,
1512         .session_info     = gensec_gssapi_session_info,
1513         .max_input_size   = gensec_gssapi_max_input_size,
1514         .max_wrapped_size = gensec_gssapi_max_wrapped_size,
1515         .wrap             = gensec_gssapi_wrap,
1516         .unwrap           = gensec_gssapi_unwrap,
1517         .have_feature     = gensec_gssapi_have_feature,
1518         .enabled          = true,
1519         .kerberos         = true,
1520         .priority         = GENSEC_GSSAPI
1521 };
1522
1523 _PUBLIC_ NTSTATUS gensec_gssapi_init(void)
1524 {
1525         NTSTATUS ret;
1526
1527         ret = gensec_register(&gensec_gssapi_spnego_security_ops);
1528         if (!NT_STATUS_IS_OK(ret)) {
1529                 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1530                         gensec_gssapi_spnego_security_ops.name));
1531                 return ret;
1532         }
1533
1534         ret = gensec_register(&gensec_gssapi_krb5_security_ops);
1535         if (!NT_STATUS_IS_OK(ret)) {
1536                 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1537                         gensec_gssapi_krb5_security_ops.name));
1538                 return ret;
1539         }
1540
1541         ret = gensec_register(&gensec_gssapi_sasl_krb5_security_ops);
1542         if (!NT_STATUS_IS_OK(ret)) {
1543                 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1544                         gensec_gssapi_sasl_krb5_security_ops.name));
1545                 return ret;
1546         }
1547
1548         return ret;
1549 }