lib/gssapi/mech/gss_krb5.c

   1 /*-
   2  * Copyright (c) 2005 Doug Rabson
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  *      $FreeBSD: src/lib/libgssapi/gss_krb5.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
  27  */
  28
  29 #include "mech_locl.h"
  30
  31 #include <krb5.h>
  32 #include <roken.h>
  33
  34
  35 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
  36 gss_krb5_copy_ccache(OM_uint32 *minor_status,
  37                      gss_cred_id_t cred,
  38                      krb5_ccache out)
  39 {
  40     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
  41     krb5_context context;
  42     krb5_error_code kret;
  43     krb5_ccache id;
  44     OM_uint32 ret;
  45     char *str = NULL;
  46
  47     ret = gss_inquire_cred_by_oid(minor_status,
  48                                   cred,
  49                                   GSS_KRB5_COPY_CCACHE_X,
  50                                   &data_set);
  51     if (ret)
  52         return ret;
  53
  54     if (data_set == GSS_C_NO_BUFFER_SET || data_set->count < 1) {
  55         gss_release_buffer_set(minor_status, &data_set);
  56         *minor_status = EINVAL;
  57         return GSS_S_FAILURE;
  58     }
  59
  60     kret = krb5_init_context(&context);
  61     if (kret) {
  62         *minor_status = kret;
  63         gss_release_buffer_set(minor_status, &data_set);
  64         return GSS_S_FAILURE;
  65     }
  66
  67     kret = asprintf(&str, "%.*s", (int)data_set->elements[0].length,
  68                     (char *)data_set->elements[0].value);
  69     gss_release_buffer_set(minor_status, &data_set);
  70     if (kret < 0 || str == NULL) {
  71         *minor_status = ENOMEM;
  72         return GSS_S_FAILURE;
  73     }
  74
  75     kret = krb5_cc_resolve(context, str, &id);
  76     free(str);
  77     if (kret) {
  78         *minor_status = kret;
  79         return GSS_S_FAILURE;
  80     }
  81
  82     kret = krb5_cc_copy_cache(context, id, out);
  83     krb5_cc_close(context, id);
  84     krb5_free_context(context);
  85     if (kret) {
  86         *minor_status = kret;
  87         return GSS_S_FAILURE;
  88     }
  89
  90     return ret;
  91 }
  92
  93 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
  94 gss_krb5_import_cred(OM_uint32 *minor_status,
  95                      krb5_ccache id,
  96                      krb5_principal keytab_principal,
  97                      krb5_keytab keytab,
  98                      gss_cred_id_t *cred)
  99 {
 100     gss_buffer_desc buffer;
 101     OM_uint32 major_status;
 102     krb5_context context;
 103     krb5_error_code ret;
 104     krb5_storage *sp;
 105     krb5_data data;
 106     char *str;
 107
 108     *cred = GSS_C_NO_CREDENTIAL;
 109
 110     ret = krb5_init_context(&context);
 111     if (ret) {
 112         *minor_status = ret;
 113         return GSS_S_FAILURE;
 114     }
 115
 116     sp = krb5_storage_emem();
 117     if (sp == NULL) {
 118         *minor_status = ENOMEM;
 119         major_status = GSS_S_FAILURE;
 120         goto out;
 121     }
 122
 123     if (id) {
 124         ret = krb5_cc_get_full_name(context, id, &str);
 125         if (ret == 0) {
 126             ret = krb5_store_string(sp, str);
 127             free(str);
 128         }
 129     } else
 130         ret = krb5_store_string(sp, "");
 131     if (ret) {
 132         *minor_status = ret;
 133         major_status = GSS_S_FAILURE;
 134         goto out;
 135     }
 136
 137     if (keytab_principal) {
 138         ret = krb5_unparse_name(context, keytab_principal, &str);
 139         if (ret == 0) {
 140             ret = krb5_store_string(sp, str);
 141             free(str);
 142         }
 143     } else
 144         krb5_store_string(sp, "");
 145     if (ret) {
 146         *minor_status = ret;
 147         major_status = GSS_S_FAILURE;
 148         goto out;
 149     }
 150
 151
 152     if (keytab) {
 153         ret = krb5_kt_get_full_name(context, keytab, &str);
 154         if (ret == 0) {
 155             ret = krb5_store_string(sp, str);
 156             free(str);
 157         }
 158     } else
 159         krb5_store_string(sp, "");
 160     if (ret) {
 161         *minor_status = ret;
 162         major_status = GSS_S_FAILURE;
 163         goto out;
 164     }
 165
 166     ret = krb5_storage_to_data(sp, &data);
 167     if (ret) {
 168         *minor_status = ret;
 169         major_status = GSS_S_FAILURE;
 170         goto out;
 171     }
 172
 173     buffer.value = data.data;
 174     buffer.length = data.length;
 175
 176     major_status = gss_set_cred_option(minor_status,
 177                                        cred,
 178                                        GSS_KRB5_IMPORT_CRED_X,
 179                                        &buffer);
 180     krb5_data_free(&data);
 181 out:
 182     if (sp)
 183         krb5_storage_free(sp);
 184     krb5_free_context(context);
 185     return major_status;
 186 }
 187
 188 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 189 gsskrb5_register_acceptor_identity(const char *identity)
 190 {
 191         gssapi_mech_interface m;
 192         gss_buffer_desc buffer;
 193         OM_uint32 junk;
 194
 195         _gss_load_mech();
 196
 197         buffer.value = rk_UNCONST(identity);
 198         buffer.length = strlen(identity);
 199
 200         m = __gss_get_mechanism(GSS_KRB5_MECHANISM);
 201         if (m == NULL || m->gm_set_sec_context_option == NULL)
 202             return GSS_S_FAILURE;
 203
 204         return m->gm_set_sec_context_option(&junk, NULL,
 205                 GSS_KRB5_REGISTER_ACCEPTOR_IDENTITY_X, &buffer);
 206 }
 207
 208 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 209 krb5_gss_register_acceptor_identity(const char *identity)
 210 {
 211     return gsskrb5_register_acceptor_identity(identity);
 212 }
 213
 214
 215 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 216 gsskrb5_set_dns_canonicalize(int flag)
 217 {
 218         struct _gss_mech_switch *m;
 219         gss_buffer_desc buffer;
 220         OM_uint32 junk;
 221         char b = (flag != 0);
 222
 223         _gss_load_mech();
 224
 225         buffer.value = &b;
 226         buffer.length = sizeof(b);
 227
 228         HEIM_TAILQ_FOREACH(m, &_gss_mechs, gm_link) {
 229                 if (m->gm_mech.gm_set_sec_context_option == NULL)
 230                         continue;
 231                 m->gm_mech.gm_set_sec_context_option(&junk, NULL,
 232                     GSS_KRB5_SET_DNS_CANONICALIZE_X, &buffer);
 233         }
 234
 235         return (GSS_S_COMPLETE);
 236 }
 237
 238
 239
 240 static krb5_error_code
 241 set_key(krb5_keyblock *keyblock, gss_krb5_lucid_key_t *key)
 242 {
 243     key->type = keyblock->keytype;
 244     key->length = keyblock->keyvalue.length;
 245     key->data = malloc(key->length);
 246     if (key->data == NULL && key->length != 0)
 247         return ENOMEM;
 248     memcpy(key->data, keyblock->keyvalue.data, key->length);
 249     return 0;
 250 }
 251
 252 static void
 253 free_key(gss_krb5_lucid_key_t *key)
 254 {
 255     memset(key->data, 0, key->length);
 256     free(key->data);
 257     memset(key, 0, sizeof(*key));
 258 }
 259
 260 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 261 gss_krb5_export_lucid_sec_context(OM_uint32 *minor_status,
 262                                   gss_ctx_id_t *context_handle,
 263                                   OM_uint32 version,
 264                                   void **rctx)
 265 {
 266     krb5_context context = NULL;
 267     krb5_error_code ret;
 268     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
 269     OM_uint32 major_status;
 270     gss_krb5_lucid_context_v1_t *ctx = NULL;
 271     krb5_storage *sp = NULL;
 272     uint32_t num;
 273
 274     if (context_handle == NULL
 275         || *context_handle == GSS_C_NO_CONTEXT
 276         || version != 1)
 277     {
 278         *minor_status = EINVAL;
 279         return GSS_S_FAILURE;
 280     }
 281
 282     major_status =
 283         gss_inquire_sec_context_by_oid (minor_status,
 284                                         *context_handle,
 285                                         GSS_KRB5_EXPORT_LUCID_CONTEXT_V1_X,
 286                                         &data_set);
 287     if (major_status)
 288         return major_status;
 289
 290     if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
 291         gss_release_buffer_set(minor_status, &data_set);
 292         *minor_status = EINVAL;
 293         return GSS_S_FAILURE;
 294     }
 295
 296     ret = krb5_init_context(&context);
 297     if (ret)
 298         goto out;
 299
 300     ctx = calloc(1, sizeof(*ctx));
 301     if (ctx == NULL) {
 302         ret = ENOMEM;
 303         goto out;
 304     }
 305
 306     sp = krb5_storage_from_mem(data_set->elements[0].value,
 307                                data_set->elements[0].length);
 308     if (sp == NULL) {
 309         ret = ENOMEM;
 310         goto out;
 311     }
 312
 313     ret = krb5_ret_uint32(sp, &num);
 314     if (ret) goto out;
 315     if (num != 1) {
 316         ret = EINVAL;
 317         goto out;
 318     }
 319     ctx->version = 1;
 320     /* initiator */
 321     ret = krb5_ret_uint32(sp, &ctx->initiate);
 322     if (ret) goto out;
 323     /* endtime */
 324     ret = krb5_ret_uint32(sp, &ctx->endtime);
 325     if (ret) goto out;
 326     /* send_seq */
 327     ret = krb5_ret_uint32(sp, &num);
 328     if (ret) goto out;
 329     ctx->send_seq = ((uint64_t)num) << 32;
 330     ret = krb5_ret_uint32(sp, &num);
 331     if (ret) goto out;
 332     ctx->send_seq |= num;
 333     /* recv_seq */
 334     ret = krb5_ret_uint32(sp, &num);
 335     if (ret) goto out;
 336     ctx->recv_seq = ((uint64_t)num) << 32;
 337     ret = krb5_ret_uint32(sp, &num);
 338     if (ret) goto out;
 339     ctx->recv_seq |= num;
 340     /* protocol */
 341     ret = krb5_ret_uint32(sp, &ctx->protocol);
 342     if (ret) goto out;
 343     if (ctx->protocol == 0) {
 344         krb5_keyblock key;
 345
 346         /* sign_alg */
 347         ret = krb5_ret_uint32(sp, &ctx->rfc1964_kd.sign_alg);
 348         if (ret) goto out;
 349         /* seal_alg */
 350         ret = krb5_ret_uint32(sp, &ctx->rfc1964_kd.seal_alg);
 351         if (ret) goto out;
 352         /* ctx_key */
 353         ret = krb5_ret_keyblock(sp, &key);
 354         if (ret) goto out;
 355         ret = set_key(&key, &ctx->rfc1964_kd.ctx_key);
 356         krb5_free_keyblock_contents(context, &key);
 357         if (ret) goto out;
 358     } else if (ctx->protocol == 1) {
 359         krb5_keyblock key;
 360
 361         /* acceptor_subkey */
 362         ret = krb5_ret_uint32(sp, &ctx->cfx_kd.have_acceptor_subkey);
 363         if (ret) goto out;
 364         /* ctx_key */
 365         ret = krb5_ret_keyblock(sp, &key);
 366         if (ret) goto out;
 367         ret = set_key(&key, &ctx->cfx_kd.ctx_key);
 368         krb5_free_keyblock_contents(context, &key);
 369         if (ret) goto out;
 370         /* acceptor_subkey */
 371         if (ctx->cfx_kd.have_acceptor_subkey) {
 372             ret = krb5_ret_keyblock(sp, &key);
 373             if (ret) goto out;
 374             ret = set_key(&key, &ctx->cfx_kd.acceptor_subkey);
 375             krb5_free_keyblock_contents(context, &key);
 376             if (ret) goto out;
 377         }
 378     } else {
 379         ret = EINVAL;
 380         goto out;
 381     }
 382
 383     *rctx = ctx;
 384
 385 out:
 386     _gss_secure_release_buffer_set(minor_status, &data_set);
 387     if (sp)
 388         krb5_storage_free(sp);
 389     if (context)
 390         krb5_free_context(context);
 391
 392     if (ret) {
 393         OM_uint32 junk;
 394         if (ctx)
 395             gss_krb5_free_lucid_sec_context(&junk, ctx);
 396
 397         *minor_status = ret;
 398         return GSS_S_FAILURE;
 399     }
 400     *minor_status = 0;
 401     return GSS_S_COMPLETE;
 402 }
 403
 404 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 405 gss_krb5_free_lucid_sec_context(OM_uint32 *minor_status, void *c)
 406 {
 407     gss_krb5_lucid_context_v1_t *ctx = c;
 408
 409     if (ctx->version != 1) {
 410         if (minor_status)
 411             *minor_status = 0;
 412         return GSS_S_FAILURE;
 413     }
 414
 415     if (ctx->protocol == 0) {
 416         free_key(&ctx->rfc1964_kd.ctx_key);
 417     } else if (ctx->protocol == 1) {
 418         free_key(&ctx->cfx_kd.ctx_key);
 419         if (ctx->cfx_kd.have_acceptor_subkey)
 420             free_key(&ctx->cfx_kd.acceptor_subkey);
 421     }
 422     free(ctx);
 423     if (minor_status)
 424         *minor_status = 0;
 425     return GSS_S_COMPLETE;
 426 }
 427
 428 /*
 429  *
 430  */
 431
 432 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 433 gss_krb5_set_allowable_enctypes(OM_uint32 *minor_status,
 434                                 gss_cred_id_t cred,
 435                                 OM_uint32 num_enctypes,
 436                                 int32_t *enctypes)
 437 {
 438     krb5_error_code ret;
 439     OM_uint32 maj_status;
 440     gss_buffer_desc buffer;
 441     krb5_storage *sp;
 442     krb5_data data;
 443     size_t i;
 444
 445     sp = krb5_storage_emem();
 446     if (sp == NULL) {
 447         *minor_status = ENOMEM;
 448         maj_status = GSS_S_FAILURE;
 449         goto out;
 450     }
 451
 452     for (i = 0; i < num_enctypes; i++) {
 453         ret = krb5_store_int32(sp, enctypes[i]);
 454         if (ret) {
 455             *minor_status = ret;
 456             maj_status = GSS_S_FAILURE;
 457             goto out;
 458         }
 459     }
 460
 461     ret = krb5_storage_to_data(sp, &data);
 462     if (ret) {
 463         *minor_status = ret;
 464         maj_status = GSS_S_FAILURE;
 465         goto out;
 466     }
 467
 468     buffer.value = data.data;
 469     buffer.length = data.length;
 470
 471     maj_status = gss_set_cred_option(minor_status,
 472                                      &cred,
 473                                      GSS_KRB5_SET_ALLOWABLE_ENCTYPES_X,
 474                                      &buffer);
 475     krb5_data_free(&data);
 476 out:
 477     if (sp)
 478         krb5_storage_free(sp);
 479     return maj_status;
 480 }
 481
 482 /*
 483  *
 484  */
 485
 486 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 487 gsskrb5_set_send_to_kdc(struct gsskrb5_send_to_kdc *c)
 488 {
 489     struct _gss_mech_switch *m;
 490     gss_buffer_desc buffer;
 491     OM_uint32 junk;
 492
 493     _gss_load_mech();
 494
 495     if (c) {
 496         buffer.value = c;
 497         buffer.length = sizeof(*c);
 498     } else {
 499         buffer.value = NULL;
 500         buffer.length = 0;
 501     }
 502
 503     HEIM_TAILQ_FOREACH(m, &_gss_mechs, gm_link) {
 504         if (m->gm_mech.gm_set_sec_context_option == NULL)
 505             continue;
 506         m->gm_mech.gm_set_sec_context_option(&junk, NULL,
 507             GSS_KRB5_SEND_TO_KDC_X, &buffer);
 508     }
 509
 510     return (GSS_S_COMPLETE);
 511 }
 512
 513 /*
 514  *
 515  */
 516
 517 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 518 gss_krb5_ccache_name(OM_uint32 *minor_status,
 519                      const char *name,
 520                      const char **out_name)
 521 {
 522     struct _gss_mech_switch *m;
 523     gss_buffer_desc buffer;
 524     OM_uint32 junk;
 525
 526     _gss_load_mech();
 527
 528     if (out_name)
 529         *out_name = NULL;
 530
 531     if (name) {
 532         buffer.value = rk_UNCONST(name);
 533         buffer.length = strlen(name);
 534     } else {
 535         _mg_buffer_zero(&buffer);
 536     }
 537
 538     HEIM_TAILQ_FOREACH(m, &_gss_mechs, gm_link) {
 539         if (m->gm_mech.gm_set_sec_context_option == NULL)
 540             continue;
 541         m->gm_mech.gm_set_sec_context_option(&junk, NULL,
 542             GSS_KRB5_CCACHE_NAME_X, &buffer);
 543     }
 544
 545     return (GSS_S_COMPLETE);
 546 }
 547
 548
 549 /*
 550  *
 551  */
 552
 553 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 554 gsskrb5_extract_authtime_from_sec_context(OM_uint32 *minor_status,
 555                                           gss_ctx_id_t context_handle,
 556                                           time_t *authtime)
 557 {
 558     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
 559     OM_uint32 maj_stat;
 560
 561     if (context_handle == GSS_C_NO_CONTEXT) {
 562         *minor_status = EINVAL;
 563         return GSS_S_FAILURE;
 564     }
 565
 566     maj_stat =
 567         gss_inquire_sec_context_by_oid (minor_status,
 568                                         context_handle,
 569                                         GSS_KRB5_GET_AUTHTIME_X,
 570                                         &data_set);
 571     if (maj_stat)
 572         return maj_stat;
 573
 574     if (data_set == GSS_C_NO_BUFFER_SET) {
 575         gss_release_buffer_set(minor_status, &data_set);
 576         *minor_status = EINVAL;
 577         return GSS_S_FAILURE;
 578     }
 579
 580     if (data_set->count != 1) {
 581         gss_release_buffer_set(minor_status, &data_set);
 582         *minor_status = EINVAL;
 583         return GSS_S_FAILURE;
 584     }
 585
 586     if (data_set->elements[0].length != 4) {
 587         gss_release_buffer_set(minor_status, &data_set);
 588         *minor_status = EINVAL;
 589         return GSS_S_FAILURE;
 590     }
 591
 592     {
 593         unsigned char *buf = data_set->elements[0].value;
 594         *authtime = (buf[3] <<24) | (buf[2] << 16) |
 595             (buf[1] << 8) | (buf[0] << 0);
 596     }
 597
 598     gss_release_buffer_set(minor_status, &data_set);
 599
 600     *minor_status = 0;
 601     return GSS_S_COMPLETE;
 602 }
 603
 604 /*
 605  *
 606  */
 607
 608 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 609 gsskrb5_extract_authz_data_from_sec_context(OM_uint32 *minor_status,
 610                                             gss_ctx_id_t context_handle,
 611                                             int ad_type,
 612                                             gss_buffer_t ad_data)
 613 {
 614     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
 615     OM_uint32 maj_stat, tmp;
 616     gss_OID_desc oid_flat;
 617     heim_oid baseoid, oid;
 618     size_t size;
 619
 620     if (context_handle == GSS_C_NO_CONTEXT) {
 621         *minor_status = EINVAL;
 622         return GSS_S_FAILURE;
 623     }
 624
 625     /* All this to append an integer to an oid... */
 626
 627     if (der_get_oid(GSS_KRB5_EXTRACT_AUTHZ_DATA_FROM_SEC_CONTEXT_X->elements,
 628                     GSS_KRB5_EXTRACT_AUTHZ_DATA_FROM_SEC_CONTEXT_X->length,
 629                     &baseoid, NULL) != 0) {
 630         *minor_status = EINVAL;
 631         return GSS_S_FAILURE;
 632     }
 633
 634     oid.length = baseoid.length + 1;
 635     oid.components = calloc(oid.length, sizeof(*oid.components));
 636     if (oid.components == NULL) {
 637         der_free_oid(&baseoid);
 638
 639         *minor_status = ENOMEM;
 640         return GSS_S_FAILURE;
 641     }
 642
 643     memcpy(oid.components, baseoid.components,
 644            baseoid.length * sizeof(*baseoid.components));
 645
 646     der_free_oid(&baseoid);
 647
 648     oid.components[oid.length - 1] = ad_type;
 649
 650     oid_flat.length = (OM_uint32)der_length_oid(&oid);
 651     oid_flat.elements = malloc(oid_flat.length);
 652     if (oid_flat.elements == NULL) {
 653         free(oid.components);
 654         *minor_status = ENOMEM;
 655         return GSS_S_FAILURE;
 656     }
 657
 658     if (der_put_oid((unsigned char *)oid_flat.elements + oid_flat.length - 1,
 659                     oid_flat.length, &oid, &size) != 0) {
 660         free(oid.components);
 661         _gss_free_oid(&tmp, &oid_flat);
 662         *minor_status = EINVAL;
 663         return GSS_S_FAILURE;
 664     }
 665     if (oid_flat.length != size)
 666         abort();
 667
 668     free(oid.components);
 669
 670     /* FINALLY, we have the OID */
 671
 672     maj_stat = gss_inquire_sec_context_by_oid (minor_status,
 673                                                context_handle,
 674                                                &oid_flat,
 675                                                &data_set);
 676
 677     _gss_free_oid(&tmp, &oid_flat);
 678
 679     if (maj_stat)
 680         return maj_stat;
 681
 682     if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
 683         gss_release_buffer_set(minor_status, &data_set);
 684         *minor_status = EINVAL;
 685         return GSS_S_FAILURE;
 686     }
 687
 688     ad_data->value = malloc(data_set->elements[0].length);
 689     if (ad_data->value == NULL) {
 690         gss_release_buffer_set(minor_status, &data_set);
 691         *minor_status = ENOMEM;
 692         return GSS_S_FAILURE;
 693     }
 694
 695     ad_data->length = data_set->elements[0].length;
 696     memcpy(ad_data->value, data_set->elements[0].value, ad_data->length);
 697     gss_release_buffer_set(minor_status, &data_set);
 698
 699     *minor_status = 0;
 700     return GSS_S_COMPLETE;
 701 }
 702
 703 /*
 704  *
 705  */
 706
 707 static OM_uint32
 708 gsskrb5_extract_key(OM_uint32 *minor_status,
 709                     gss_ctx_id_t context_handle,
 710                     const gss_OID oid,
 711                     krb5_keyblock **keyblock)
 712 {
 713     krb5_error_code ret;
 714     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
 715     OM_uint32 major_status;
 716     krb5_context context = NULL;
 717     krb5_storage *sp = NULL;
 718
 719     if (context_handle == GSS_C_NO_CONTEXT) {
 720         *minor_status = EINVAL;
 721         return GSS_S_FAILURE;
 722     }
 723
 724     ret = krb5_init_context(&context);
 725     if(ret) {
 726         *minor_status = ret;
 727         return GSS_S_FAILURE;
 728     }
 729
 730     major_status =
 731         gss_inquire_sec_context_by_oid (minor_status,
 732                                         context_handle,
 733                                         oid,
 734                                         &data_set);
 735     if (major_status)
 736         return major_status;
 737
 738     if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
 739         _gss_secure_release_buffer_set(minor_status, &data_set);
 740         *minor_status = EINVAL;
 741         return GSS_S_FAILURE;
 742     }
 743
 744     sp = krb5_storage_from_mem(data_set->elements[0].value,
 745                                data_set->elements[0].length);
 746     if (sp == NULL) {
 747         ret = ENOMEM;
 748         goto out;
 749     }
 750
 751     *keyblock = calloc(1, sizeof(**keyblock));
 752     if (keyblock == NULL) {
 753         ret = ENOMEM;
 754         goto out;
 755     }
 756
 757     ret = krb5_ret_keyblock(sp, *keyblock);
 758
 759 out:
 760     _gss_secure_release_buffer_set(minor_status, &data_set);
 761     if (sp)
 762         krb5_storage_free(sp);
 763     if (ret && keyblock) {
 764         krb5_free_keyblock(context, *keyblock);
 765         *keyblock = NULL;
 766     }
 767     if (context)
 768         krb5_free_context(context);
 769
 770     *minor_status = ret;
 771     if (ret)
 772         return GSS_S_FAILURE;
 773
 774     return GSS_S_COMPLETE;
 775 }
 776
 777 /*
 778  *
 779  */
 780
 781 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 782 gsskrb5_extract_service_keyblock(OM_uint32 *minor_status,
 783                                  gss_ctx_id_t context_handle,
 784                                  krb5_keyblock **keyblock)
 785 {
 786     return gsskrb5_extract_key(minor_status,
 787                                context_handle,
 788                                GSS_KRB5_GET_SERVICE_KEYBLOCK_X,
 789                                keyblock);
 790 }
 791
 792 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 793 gsskrb5_get_initiator_subkey(OM_uint32 *minor_status,
 794                              gss_ctx_id_t context_handle,
 795                              krb5_keyblock **keyblock)
 796 {
 797     return gsskrb5_extract_key(minor_status,
 798                                context_handle,
 799                                GSS_KRB5_GET_INITIATOR_SUBKEY_X,
 800                                keyblock);
 801 }
 802
 803 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 804 gsskrb5_get_subkey(OM_uint32 *minor_status,
 805                    gss_ctx_id_t context_handle,
 806                    krb5_keyblock **keyblock)
 807 {
 808     return gsskrb5_extract_key(minor_status,
 809                                context_handle,
 810                                GSS_KRB5_GET_SUBKEY_X,
 811                                keyblock);
 812 }
 813
 814 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 815 gsskrb5_set_default_realm(const char *realm)
 816 {
 817         struct _gss_mech_switch *m;
 818         gss_buffer_desc buffer;
 819         OM_uint32 junk;
 820
 821         _gss_load_mech();
 822
 823         buffer.value = rk_UNCONST(realm);
 824         buffer.length = strlen(realm);
 825
 826         HEIM_TAILQ_FOREACH(m, &_gss_mechs, gm_link) {
 827                 if (m->gm_mech.gm_set_sec_context_option == NULL)
 828                         continue;
 829                 m->gm_mech.gm_set_sec_context_option(&junk, NULL,
 830                     GSS_KRB5_SET_DEFAULT_REALM_X, &buffer);
 831         }
 832
 833         return (GSS_S_COMPLETE);
 834 }
 835
 836 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 837 gss_krb5_get_tkt_flags(OM_uint32 *minor_status,
 838                        gss_ctx_id_t context_handle,
 839                        OM_uint32 *tkt_flags)
 840 {
 841
 842     OM_uint32 major_status;
 843     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
 844
 845     if (context_handle == GSS_C_NO_CONTEXT) {
 846         *minor_status = EINVAL;
 847         return GSS_S_FAILURE;
 848     }
 849
 850     major_status =
 851         gss_inquire_sec_context_by_oid (minor_status,
 852                                         context_handle,
 853                                         GSS_KRB5_GET_TKT_FLAGS_X,
 854                                         &data_set);
 855     if (major_status)
 856         return major_status;
 857
 858     if (data_set == GSS_C_NO_BUFFER_SET ||
 859         data_set->count != 1 ||
 860         data_set->elements[0].length < 4) {
 861         gss_release_buffer_set(minor_status, &data_set);
 862         *minor_status = EINVAL;
 863         return GSS_S_FAILURE;
 864     }
 865
 866     {
 867         const u_char *p = data_set->elements[0].value;
 868         *tkt_flags = (p[0] << 0) | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
 869     }
 870
 871     gss_release_buffer_set(minor_status, &data_set);
 872     return GSS_S_COMPLETE;
 873 }
 874
 875 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 876 gsskrb5_set_time_offset(int offset)
 877 {
 878         struct _gss_mech_switch *m;
 879         gss_buffer_desc buffer;
 880         OM_uint32 junk;
 881         int32_t o = offset;
 882
 883         _gss_load_mech();
 884
 885         buffer.value = &o;
 886         buffer.length = sizeof(o);
 887
 888         HEIM_TAILQ_FOREACH(m, &_gss_mechs, gm_link) {
 889                 if (m->gm_mech.gm_set_sec_context_option == NULL)
 890                         continue;
 891                 m->gm_mech.gm_set_sec_context_option(&junk, NULL,
 892                     GSS_KRB5_SET_TIME_OFFSET_X, &buffer);
 893         }
 894
 895         return (GSS_S_COMPLETE);
 896 }
 897
 898 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 899 gsskrb5_get_time_offset(int *offset)
 900 {
 901         struct _gss_mech_switch *m;
 902         gss_buffer_desc buffer;
 903         OM_uint32 maj_stat, junk;
 904         int32_t o;
 905
 906         _gss_load_mech();
 907
 908         buffer.value = &o;
 909         buffer.length = sizeof(o);
 910
 911         HEIM_TAILQ_FOREACH(m, &_gss_mechs, gm_link) {
 912                 if (m->gm_mech.gm_set_sec_context_option == NULL)
 913                         continue;
 914                 maj_stat = m->gm_mech.gm_set_sec_context_option(&junk, NULL,
 915                     GSS_KRB5_GET_TIME_OFFSET_X, &buffer);
 916
 917                 if (maj_stat == GSS_S_COMPLETE) {
 918                         *offset = o;
 919                         return maj_stat;
 920                 }
 921         }
 922
 923         return (GSS_S_UNAVAILABLE);
 924 }
 925
 926 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 927 gsskrb5_plugin_register(struct gsskrb5_krb5_plugin *c)
 928 {
 929     struct _gss_mech_switch *m;
 930     gss_buffer_desc buffer;
 931     OM_uint32 junk;
 932
 933     _gss_load_mech();
 934
 935     buffer.value = c;
 936     buffer.length = sizeof(*c);
 937
 938     HEIM_TAILQ_FOREACH(m, &_gss_mechs, gm_link) {
 939         if (m->gm_mech.gm_set_sec_context_option == NULL)
 940             continue;
 941         m->gm_mech.gm_set_sec_context_option(&junk, NULL,
 942             GSS_KRB5_PLUGIN_REGISTER_X, &buffer);
 943     }
 944
 945     return (GSS_S_COMPLETE);
 946 }