lib/krb5/kcm.c

   1 /*
   2  * Copyright (c) 2005, PADL Software Pty Ltd.
   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  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * 3. Neither the name of PADL Software nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include "krb5_locl.h"
  34
  35 #ifdef HAVE_KCM
  36 /*
  37  * Client library for Kerberos Credentials Manager (KCM) daemon
  38  */
  39
  40 #ifdef HAVE_SYS_UN_H
  41 #include <sys/un.h>
  42 #endif
  43
  44 #include "kcm.h"
  45
  46 typedef struct krb5_kcmcache {
  47     char *name;
  48     struct sockaddr_un path;
  49     char *door_path;
  50 } krb5_kcmcache;
  51
  52 typedef struct krb5_kcm_cursor {
  53     unsigned long offset;
  54     unsigned long length;
  55     kcmuuid_t *uuids;
  56 } *krb5_kcm_cursor;
  57
  58
  59 #define KCMCACHE(X)     ((krb5_kcmcache *)(X)->data.data)
  60 #define CACHENAME(X)    (KCMCACHE(X)->name)
  61 #define KCMCURSOR(C)    ((krb5_kcm_cursor)(C))
  62
  63 #ifdef HAVE_DOOR_CREATE
  64
  65 static krb5_error_code
  66 try_door(krb5_context context,
  67          krb5_kcmcache *k,
  68          krb5_data *request_data,
  69          krb5_data *response_data)
  70 {
  71     door_arg_t arg;
  72     int fd;
  73     int ret;
  74
  75     memset(&arg, 0, sizeof(arg));
  76
  77     fd = open(k->door_path, O_RDWR);
  78     if (fd < 0)
  79         return KRB5_CC_IO;
  80     rk_cloexec(fd);
  81
  82     arg.data_ptr = request_data->data;
  83     arg.data_size = request_data->length;
  84     arg.desc_ptr = NULL;
  85     arg.desc_num = 0;
  86     arg.rbuf = NULL;
  87     arg.rsize = 0;
  88
  89     ret = door_call(fd, &arg);
  90     close(fd);
  91     if (ret != 0)
  92         return KRB5_CC_IO;
  93
  94     ret = krb5_data_copy(response_data, arg.rbuf, arg.rsize);
  95     munmap(arg.rbuf, arg.rsize);
  96     if (ret)
  97         return ret;
  98
  99     return 0;
 100 }
 101 #endif /* HAVE_DOOR_CREATE */
 102
 103 static krb5_error_code
 104 try_unix_socket(krb5_context context,
 105                 krb5_kcmcache *k,
 106                 krb5_data *request_data,
 107                 krb5_data *response_data)
 108 {
 109     krb5_error_code ret;
 110     int fd;
 111
 112     fd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
 113     if (fd < 0)
 114         return KRB5_CC_IO;
 115     rk_cloexec(fd);
 116
 117     if (connect(fd, rk_UNCONST(&k->path), sizeof(k->path)) != 0) {
 118         close(fd);
 119         return KRB5_CC_IO;
 120     }
 121
 122     ret = _krb5_send_and_recv_tcp(fd, context->kdc_timeout,
 123                                   request_data, response_data);
 124     close(fd);
 125     return ret;
 126 }
 127
 128 static krb5_error_code
 129 kcm_send_request(krb5_context context,
 130                  krb5_kcmcache *k,
 131                  krb5_storage *request,
 132                  krb5_data *response_data)
 133 {
 134     krb5_error_code ret;
 135     krb5_data request_data;
 136     int i;
 137
 138     response_data->data = NULL;
 139     response_data->length = 0;
 140
 141     ret = krb5_storage_to_data(request, &request_data);
 142     if (ret) {
 143         krb5_clear_error_message(context);
 144         return KRB5_CC_NOMEM;
 145     }
 146
 147     ret = KRB5_CC_NOSUPP;
 148
 149     for (i = 0; i < context->max_retries; i++) {
 150 #ifdef HAVE_DOOR_CREATE
 151         ret = try_door(context, k, &request_data, response_data);
 152         if (ret == 0 && response_data->length != 0)
 153             break;
 154 #endif
 155         ret = try_unix_socket(context, k, &request_data, response_data);
 156         if (ret == 0 && response_data->length != 0)
 157             break;
 158     }
 159
 160     krb5_data_free(&request_data);
 161
 162     if (ret) {
 163         krb5_clear_error_message(context);
 164         ret = KRB5_CC_NOSUPP;
 165     }
 166
 167     return ret;
 168 }
 169
 170 static krb5_error_code
 171 kcm_storage_request(krb5_context context,
 172                     kcm_operation opcode,
 173                     krb5_storage **storage_p)
 174 {
 175     krb5_storage *sp;
 176     krb5_error_code ret;
 177
 178     *storage_p = NULL;
 179
 180     sp = krb5_storage_emem();
 181     if (sp == NULL) {
 182         krb5_set_error_message(context, KRB5_CC_NOMEM, N_("malloc: out of memory", ""));
 183         return KRB5_CC_NOMEM;
 184     }
 185
 186     /* Send MAJOR | VERSION | OPCODE */
 187     ret  = krb5_store_int8(sp, KCM_PROTOCOL_VERSION_MAJOR);
 188     if (ret)
 189         goto fail;
 190     ret = krb5_store_int8(sp, KCM_PROTOCOL_VERSION_MINOR);
 191     if (ret)
 192         goto fail;
 193     ret = krb5_store_int16(sp, opcode);
 194     if (ret)
 195         goto fail;
 196
 197     *storage_p = sp;
 198  fail:
 199     if (ret) {
 200         krb5_set_error_message(context, ret,
 201                                N_("Failed to encode KCM request", ""));
 202         krb5_storage_free(sp);
 203     }
 204
 205     return ret;
 206 }
 207
 208 static krb5_error_code
 209 kcm_alloc(krb5_context context, const char *name, krb5_ccache *id)
 210 {
 211     krb5_kcmcache *k;
 212     const char *path;
 213
 214     k = malloc(sizeof(*k));
 215     if (k == NULL) {
 216         krb5_set_error_message(context, KRB5_CC_NOMEM,
 217                                N_("malloc: out of memory", ""));
 218         return KRB5_CC_NOMEM;
 219     }
 220
 221     if (name != NULL) {
 222         k->name = strdup(name);
 223         if (k->name == NULL) {
 224             free(k);
 225             krb5_set_error_message(context, KRB5_CC_NOMEM,
 226                                    N_("malloc: out of memory", ""));
 227             return KRB5_CC_NOMEM;
 228         }
 229     } else
 230         k->name = NULL;
 231
 232     path = krb5_config_get_string_default(context, NULL,
 233                                           _PATH_KCM_SOCKET,
 234                                           "libdefaults",
 235                                           "kcm_socket",
 236                                           NULL);
 237
 238     k->path.sun_family = AF_UNIX;
 239     strlcpy(k->path.sun_path, path, sizeof(k->path.sun_path));
 240
 241     path = krb5_config_get_string_default(context, NULL,
 242                                           _PATH_KCM_DOOR,
 243                                           "libdefaults",
 244                                           "kcm_door",
 245                                           NULL);
 246     k->door_path = strdup(path);
 247
 248     (*id)->data.data = k;
 249     (*id)->data.length = sizeof(*k);
 250
 251     return 0;
 252 }
 253
 254 static krb5_error_code
 255 kcm_call(krb5_context context,
 256          krb5_kcmcache *k,
 257          krb5_storage *request,
 258          krb5_storage **response_p,
 259          krb5_data *response_data_p)
 260 {
 261     krb5_data response_data;
 262     krb5_error_code ret;
 263     int32_t status;
 264     krb5_storage *response;
 265
 266     if (response_p != NULL)
 267         *response_p = NULL;
 268
 269     ret = kcm_send_request(context, k, request, &response_data);
 270     if (ret) {
 271         return ret;
 272     }
 273
 274     response = krb5_storage_from_data(&response_data);
 275     if (response == NULL) {
 276         krb5_data_free(&response_data);
 277         return KRB5_CC_IO;
 278     }
 279
 280     ret = krb5_ret_int32(response, &status);
 281     if (ret) {
 282         krb5_storage_free(response);
 283         krb5_data_free(&response_data);
 284         return KRB5_CC_FORMAT;
 285     }
 286
 287     if (status) {
 288         krb5_storage_free(response);
 289         krb5_data_free(&response_data);
 290         return status;
 291     }
 292
 293     if (response_p != NULL) {
 294         *response_data_p = response_data;
 295         *response_p = response;
 296
 297         return 0;
 298     }
 299
 300     krb5_storage_free(response);
 301     krb5_data_free(&response_data);
 302
 303     return 0;
 304 }
 305
 306 static void
 307 kcm_free(krb5_context context, krb5_ccache *id)
 308 {
 309     krb5_kcmcache *k = KCMCACHE(*id);
 310
 311     if (k != NULL) {
 312         if (k->name != NULL)
 313             free(k->name);
 314         if (k->door_path)
 315             free(k->door_path);
 316         memset(k, 0, sizeof(*k));
 317         krb5_data_free(&(*id)->data);
 318     }
 319 }
 320
 321 static const char *
 322 kcm_get_name(krb5_context context,
 323              krb5_ccache id)
 324 {
 325     return CACHENAME(id);
 326 }
 327
 328 static krb5_error_code
 329 kcm_resolve(krb5_context context, krb5_ccache *id, const char *res)
 330 {
 331     return kcm_alloc(context, res, id);
 332 }
 333
 334 /*
 335  * Request:
 336  *
 337  * Response:
 338  *      NameZ
 339  */
 340 static krb5_error_code
 341 kcm_gen_new(krb5_context context, krb5_ccache *id)
 342 {
 343     krb5_kcmcache *k;
 344     krb5_error_code ret;
 345     krb5_storage *request, *response;
 346     krb5_data response_data;
 347
 348     ret = kcm_alloc(context, NULL, id);
 349     if (ret)
 350         return ret;
 351
 352     k = KCMCACHE(*id);
 353
 354     ret = kcm_storage_request(context, KCM_OP_GEN_NEW, &request);
 355     if (ret) {
 356         kcm_free(context, id);
 357         return ret;
 358     }
 359
 360     ret = kcm_call(context, k, request, &response, &response_data);
 361     if (ret) {
 362         krb5_storage_free(request);
 363         kcm_free(context, id);
 364         return ret;
 365     }
 366
 367     ret = krb5_ret_stringz(response, &k->name);
 368     if (ret)
 369         ret = KRB5_CC_IO;
 370
 371     krb5_storage_free(request);
 372     krb5_storage_free(response);
 373     krb5_data_free(&response_data);
 374
 375     if (ret)
 376         kcm_free(context, id);
 377
 378     return ret;
 379 }
 380
 381 /*
 382  * Request:
 383  *      NameZ
 384  *      Principal
 385  *
 386  * Response:
 387  *
 388  */
 389 static krb5_error_code
 390 kcm_initialize(krb5_context context,
 391                krb5_ccache id,
 392                krb5_principal primary_principal)
 393 {
 394     krb5_error_code ret;
 395     krb5_kcmcache *k = KCMCACHE(id);
 396     krb5_storage *request;
 397
 398     ret = kcm_storage_request(context, KCM_OP_INITIALIZE, &request);
 399     if (ret)
 400         return ret;
 401
 402     ret = krb5_store_stringz(request, k->name);
 403     if (ret) {
 404         krb5_storage_free(request);
 405         return ret;
 406     }
 407
 408     ret = krb5_store_principal(request, primary_principal);
 409     if (ret) {
 410         krb5_storage_free(request);
 411         return ret;
 412     }
 413
 414     ret = kcm_call(context, k, request, NULL, NULL);
 415
 416     krb5_storage_free(request);
 417     return ret;
 418 }
 419
 420 static krb5_error_code
 421 kcm_close(krb5_context context,
 422           krb5_ccache id)
 423 {
 424     kcm_free(context, &id);
 425     return 0;
 426 }
 427
 428 /*
 429  * Request:
 430  *      NameZ
 431  *
 432  * Response:
 433  *
 434  */
 435 static krb5_error_code
 436 kcm_destroy(krb5_context context,
 437             krb5_ccache id)
 438 {
 439     krb5_error_code ret;
 440     krb5_kcmcache *k = KCMCACHE(id);
 441     krb5_storage *request;
 442
 443     ret = kcm_storage_request(context, KCM_OP_DESTROY, &request);
 444     if (ret)
 445         return ret;
 446
 447     ret = krb5_store_stringz(request, k->name);
 448     if (ret) {
 449         krb5_storage_free(request);
 450         return ret;
 451     }
 452
 453     ret = kcm_call(context, k, request, NULL, NULL);
 454
 455     krb5_storage_free(request);
 456     return ret;
 457 }
 458
 459 /*
 460  * Request:
 461  *      NameZ
 462  *      Creds
 463  *
 464  * Response:
 465  *
 466  */
 467 static krb5_error_code
 468 kcm_store_cred(krb5_context context,
 469                krb5_ccache id,
 470                krb5_creds *creds)
 471 {
 472     krb5_error_code ret;
 473     krb5_kcmcache *k = KCMCACHE(id);
 474     krb5_storage *request;
 475
 476     ret = kcm_storage_request(context, KCM_OP_STORE, &request);
 477     if (ret)
 478         return ret;
 479
 480     ret = krb5_store_stringz(request, k->name);
 481     if (ret) {
 482         krb5_storage_free(request);
 483         return ret;
 484     }
 485
 486     ret = krb5_store_creds(request, creds);
 487     if (ret) {
 488         krb5_storage_free(request);
 489         return ret;
 490     }
 491
 492     ret = kcm_call(context, k, request, NULL, NULL);
 493
 494     krb5_storage_free(request);
 495     return ret;
 496 }
 497
 498 /*
 499  * Request:
 500  *      NameZ
 501  *      WhichFields
 502  *      MatchCreds
 503  *
 504  * Response:
 505  *      Creds
 506  *
 507  */
 508 static krb5_error_code
 509 kcm_retrieve(krb5_context context,
 510              krb5_ccache id,
 511              krb5_flags which,
 512              const krb5_creds *mcred,
 513              krb5_creds *creds)
 514 {
 515     krb5_error_code ret;
 516     krb5_kcmcache *k = KCMCACHE(id);
 517     krb5_storage *request, *response;
 518     krb5_data response_data;
 519
 520     ret = kcm_storage_request(context, KCM_OP_RETRIEVE, &request);
 521     if (ret)
 522         return ret;
 523
 524     ret = krb5_store_stringz(request, k->name);
 525     if (ret) {
 526         krb5_storage_free(request);
 527         return ret;
 528     }
 529
 530     ret = krb5_store_int32(request, which);
 531     if (ret) {
 532         krb5_storage_free(request);
 533         return ret;
 534     }
 535
 536     ret = krb5_store_creds_tag(request, rk_UNCONST(mcred));
 537     if (ret) {
 538         krb5_storage_free(request);
 539         return ret;
 540     }
 541
 542     ret = kcm_call(context, k, request, &response, &response_data);
 543     if (ret) {
 544         krb5_storage_free(request);
 545         return ret;
 546     }
 547
 548     ret = krb5_ret_creds(response, creds);
 549     if (ret)
 550         ret = KRB5_CC_IO;
 551
 552     krb5_storage_free(request);
 553     krb5_storage_free(response);
 554     krb5_data_free(&response_data);
 555
 556     return ret;
 557 }
 558
 559 /*
 560  * Request:
 561  *      NameZ
 562  *
 563  * Response:
 564  *      Principal
 565  */
 566 static krb5_error_code
 567 kcm_get_principal(krb5_context context,
 568                   krb5_ccache id,
 569                   krb5_principal *principal)
 570 {
 571     krb5_error_code ret;
 572     krb5_kcmcache *k = KCMCACHE(id);
 573     krb5_storage *request, *response;
 574     krb5_data response_data;
 575
 576     ret = kcm_storage_request(context, KCM_OP_GET_PRINCIPAL, &request);
 577     if (ret)
 578         return ret;
 579
 580     ret = krb5_store_stringz(request, k->name);
 581     if (ret) {
 582         krb5_storage_free(request);
 583         return ret;
 584     }
 585
 586     ret = kcm_call(context, k, request, &response, &response_data);
 587     if (ret) {
 588         krb5_storage_free(request);
 589         return ret;
 590     }
 591
 592     ret = krb5_ret_principal(response, principal);
 593     if (ret)
 594         ret = KRB5_CC_IO;
 595
 596     krb5_storage_free(request);
 597     krb5_storage_free(response);
 598     krb5_data_free(&response_data);
 599
 600     return ret;
 601 }
 602
 603 /*
 604  * Request:
 605  *      NameZ
 606  *
 607  * Response:
 608  *      Cursor
 609  *
 610  */
 611 static krb5_error_code
 612 kcm_get_first (krb5_context context,
 613                krb5_ccache id,
 614                krb5_cc_cursor *cursor)
 615 {
 616     krb5_error_code ret;
 617     krb5_kcm_cursor c;
 618     krb5_kcmcache *k = KCMCACHE(id);
 619     krb5_storage *request, *response;
 620     krb5_data response_data;
 621
 622     ret = kcm_storage_request(context, KCM_OP_GET_FIRST, &request);
 623     if (ret)
 624         return ret;
 625
 626     ret = krb5_store_stringz(request, k->name);
 627     if (ret) {
 628         krb5_storage_free(request);
 629         return ret;
 630     }
 631
 632     ret = kcm_call(context, k, request, &response, &response_data);
 633     krb5_storage_free(request);
 634     if (ret)
 635         return ret;
 636
 637     c = calloc(1, sizeof(*c));
 638     if (c == NULL) {
 639         ret = ENOMEM;
 640         krb5_set_error_message(context, ret,
 641                                N_("malloc: out of memory", ""));
 642         return ret;
 643     }
 644
 645     while (1) {
 646         ssize_t sret;
 647         kcmuuid_t uuid;
 648         void *ptr;
 649
 650         sret = krb5_storage_read(response, &uuid, sizeof(uuid));
 651         if (sret == 0) {
 652             ret = 0;
 653             break;
 654         } else if (sret != sizeof(uuid)) {
 655             ret = EINVAL;
 656             break;
 657         }
 658
 659         ptr = realloc(c->uuids, sizeof(c->uuids[0]) * (c->length + 1));
 660         if (ptr == NULL) {
 661             free(c->uuids);
 662             free(c);
 663             krb5_set_error_message(context, ENOMEM,
 664                                    N_("malloc: out of memory", ""));
 665             return ENOMEM;
 666         }
 667         c->uuids = ptr;
 668
 669         memcpy(&c->uuids[c->length], &uuid, sizeof(uuid));
 670         c->length += 1;
 671     }
 672
 673     krb5_storage_free(response);
 674     krb5_data_free(&response_data);
 675
 676     if (ret) {
 677         free(c->uuids);
 678         free(c);
 679         return ret;
 680     }
 681
 682     *cursor = c;
 683
 684     return 0;
 685 }
 686
 687 /*
 688  * Request:
 689  *      NameZ
 690  *      Cursor
 691  *
 692  * Response:
 693  *      Creds
 694  */
 695 static krb5_error_code
 696 kcm_get_next (krb5_context context,
 697                 krb5_ccache id,
 698                 krb5_cc_cursor *cursor,
 699                 krb5_creds *creds)
 700 {
 701     krb5_error_code ret;
 702     krb5_kcmcache *k = KCMCACHE(id);
 703     krb5_kcm_cursor c = KCMCURSOR(*cursor);
 704     krb5_storage *request, *response;
 705     krb5_data response_data;
 706     ssize_t sret;
 707
 708  again:
 709
 710     if (c->offset >= c->length)
 711         return KRB5_CC_END;
 712
 713     ret = kcm_storage_request(context, KCM_OP_GET_NEXT, &request);
 714     if (ret)
 715         return ret;
 716
 717     ret = krb5_store_stringz(request, k->name);
 718     if (ret) {
 719         krb5_storage_free(request);
 720         return ret;
 721     }
 722
 723     sret = krb5_storage_write(request,
 724                               &c->uuids[c->offset],
 725                               sizeof(c->uuids[c->offset]));
 726     c->offset++;
 727     if (sret != sizeof(c->uuids[c->offset])) {
 728         krb5_storage_free(request);
 729         krb5_clear_error_message(context);
 730         return ENOMEM;
 731     }
 732
 733     ret = kcm_call(context, k, request, &response, &response_data);
 734     krb5_storage_free(request);
 735     if (ret == KRB5_CC_END) {
 736         goto again;
 737     }
 738
 739     ret = krb5_ret_creds(response, creds);
 740     if (ret)
 741         ret = KRB5_CC_IO;
 742
 743     krb5_storage_free(response);
 744     krb5_data_free(&response_data);
 745
 746     return ret;
 747 }
 748
 749 /*
 750  * Request:
 751  *      NameZ
 752  *      Cursor
 753  *
 754  * Response:
 755  *
 756  */
 757 static krb5_error_code
 758 kcm_end_get (krb5_context context,
 759              krb5_ccache id,
 760              krb5_cc_cursor *cursor)
 761 {
 762     krb5_error_code ret;
 763     krb5_kcmcache *k = KCMCACHE(id);
 764     krb5_kcm_cursor c = KCMCURSOR(*cursor);
 765     krb5_storage *request;
 766
 767     ret = kcm_storage_request(context, KCM_OP_END_GET, &request);
 768     if (ret)
 769         return ret;
 770
 771     ret = krb5_store_stringz(request, k->name);
 772     if (ret) {
 773         krb5_storage_free(request);
 774         return ret;
 775     }
 776
 777     ret = kcm_call(context, k, request, NULL, NULL);
 778     krb5_storage_free(request);
 779     if (ret)
 780         return ret;
 781
 782     free(c->uuids);
 783     free(c);
 784
 785     *cursor = NULL;
 786
 787     return ret;
 788 }
 789
 790 /*
 791  * Request:
 792  *      NameZ
 793  *      WhichFields
 794  *      MatchCreds
 795  *
 796  * Response:
 797  *
 798  */
 799 static krb5_error_code
 800 kcm_remove_cred(krb5_context context,
 801                 krb5_ccache id,
 802                 krb5_flags which,
 803                 krb5_creds *cred)
 804 {
 805     krb5_error_code ret;
 806     krb5_kcmcache *k = KCMCACHE(id);
 807     krb5_storage *request;
 808
 809     ret = kcm_storage_request(context, KCM_OP_REMOVE_CRED, &request);
 810     if (ret)
 811         return ret;
 812
 813     ret = krb5_store_stringz(request, k->name);
 814     if (ret) {
 815         krb5_storage_free(request);
 816         return ret;
 817     }
 818
 819     ret = krb5_store_int32(request, which);
 820     if (ret) {
 821         krb5_storage_free(request);
 822         return ret;
 823     }
 824
 825     ret = krb5_store_creds_tag(request, cred);
 826     if (ret) {
 827         krb5_storage_free(request);
 828         return ret;
 829     }
 830
 831     ret = kcm_call(context, k, request, NULL, NULL);
 832
 833     krb5_storage_free(request);
 834     return ret;
 835 }
 836
 837 static krb5_error_code
 838 kcm_set_flags(krb5_context context,
 839               krb5_ccache id,
 840               krb5_flags flags)
 841 {
 842     krb5_error_code ret;
 843     krb5_kcmcache *k = KCMCACHE(id);
 844     krb5_storage *request;
 845
 846     ret = kcm_storage_request(context, KCM_OP_SET_FLAGS, &request);
 847     if (ret)
 848         return ret;
 849
 850     ret = krb5_store_stringz(request, k->name);
 851     if (ret) {
 852         krb5_storage_free(request);
 853         return ret;
 854     }
 855
 856     ret = krb5_store_int32(request, flags);
 857     if (ret) {
 858         krb5_storage_free(request);
 859         return ret;
 860     }
 861
 862     ret = kcm_call(context, k, request, NULL, NULL);
 863
 864     krb5_storage_free(request);
 865     return ret;
 866 }
 867
 868 static int
 869 kcm_get_version(krb5_context context,
 870                 krb5_ccache id)
 871 {
 872     return 0;
 873 }
 874
 875 static krb5_error_code
 876 kcm_move(krb5_context context, krb5_ccache from, krb5_ccache to)
 877 {
 878     krb5_error_code ret;
 879     krb5_kcmcache *oldk = KCMCACHE(from);
 880     krb5_kcmcache *newk = KCMCACHE(to);
 881     krb5_storage *request;
 882
 883     ret = kcm_storage_request(context, KCM_OP_MOVE_CACHE, &request);
 884     if (ret)
 885         return ret;
 886
 887     ret = krb5_store_stringz(request, oldk->name);
 888     if (ret) {
 889         krb5_storage_free(request);
 890         return ret;
 891     }
 892
 893     ret = krb5_store_stringz(request, newk->name);
 894     if (ret) {
 895         krb5_storage_free(request);
 896         return ret;
 897     }
 898     ret = kcm_call(context, oldk, request, NULL, NULL);
 899
 900     krb5_storage_free(request);
 901     return ret;
 902 }
 903
 904 static krb5_error_code
 905 kcm_default_name(krb5_context context, char **str)
 906 {
 907     return _krb5_expand_default_cc_name(context,
 908                                         KRB5_DEFAULT_CCNAME_KCM,
 909                                         str);
 910 }
 911
 912 static krb5_error_code
 913 kcm_lastchange(krb5_context context, krb5_ccache id, krb5_timestamp *mtime)
 914 {
 915     *mtime = time(NULL);
 916     return 0;
 917 }
 918
 919 /**
 920  * Variable containing the KCM based credential cache implemention.
 921  *
 922  * @ingroup krb5_ccache
 923  */
 924
 925 KRB5_LIB_VARIABLE const krb5_cc_ops krb5_kcm_ops = {
 926     KRB5_CC_OPS_VERSION,
 927     "KCM",
 928     kcm_get_name,
 929     kcm_resolve,
 930     kcm_gen_new,
 931     kcm_initialize,
 932     kcm_destroy,
 933     kcm_close,
 934     kcm_store_cred,
 935     kcm_retrieve,
 936     kcm_get_principal,
 937     kcm_get_first,
 938     kcm_get_next,
 939     kcm_end_get,
 940     kcm_remove_cred,
 941     kcm_set_flags,
 942     kcm_get_version,
 943     NULL,
 944     NULL,
 945     NULL,
 946     kcm_move,
 947     kcm_default_name,
 948     NULL,
 949     kcm_lastchange
 950 };
 951
 952 krb5_boolean
 953 _krb5_kcm_is_running(krb5_context context)
 954 {
 955     krb5_error_code ret;
 956     krb5_ccache_data ccdata;
 957     krb5_ccache id = &ccdata;
 958     krb5_boolean running;
 959
 960     ret = kcm_alloc(context, NULL, &id);
 961     if (ret)
 962         return 0;
 963
 964     running = (_krb5_kcm_noop(context, id) == 0);
 965
 966     kcm_free(context, &id);
 967
 968     return running;
 969 }
 970
 971 /*
 972  * Request:
 973  *
 974  * Response:
 975  *
 976  */
 977 krb5_error_code
 978 _krb5_kcm_noop(krb5_context context,
 979                krb5_ccache id)
 980 {
 981     krb5_error_code ret;
 982     krb5_kcmcache *k = KCMCACHE(id);
 983     krb5_storage *request;
 984
 985     ret = kcm_storage_request(context, KCM_OP_NOOP, &request);
 986     if (ret)
 987         return ret;
 988
 989     ret = kcm_call(context, k, request, NULL, NULL);
 990
 991     krb5_storage_free(request);
 992     return ret;
 993 }
 994
 995
 996 /*
 997  * Request:
 998  *      NameZ
 999  *      Mode
1000  *
1001  * Response:
1002  *
1003  */
1004 krb5_error_code
1005 _krb5_kcm_chmod(krb5_context context,
1006                 krb5_ccache id,
1007                 uint16_t mode)
1008 {
1009     krb5_error_code ret;
1010     krb5_kcmcache *k = KCMCACHE(id);
1011     krb5_storage *request;
1012
1013     ret = kcm_storage_request(context, KCM_OP_CHMOD, &request);
1014     if (ret)
1015         return ret;
1016
1017     ret = krb5_store_stringz(request, k->name);
1018     if (ret) {
1019         krb5_storage_free(request);
1020         return ret;
1021     }
1022
1023     ret = krb5_store_int16(request, mode);
1024     if (ret) {
1025         krb5_storage_free(request);
1026         return ret;
1027     }
1028
1029     ret = kcm_call(context, k, request, NULL, NULL);
1030
1031     krb5_storage_free(request);
1032     return ret;
1033 }
1034
1035
1036 /*
1037  * Request:
1038  *      NameZ
1039  *      UID
1040  *      GID
1041  *
1042  * Response:
1043  *
1044  */
1045 krb5_error_code
1046 _krb5_kcm_chown(krb5_context context,
1047                 krb5_ccache id,
1048                 uint32_t uid,
1049                 uint32_t gid)
1050 {
1051     krb5_error_code ret;
1052     krb5_kcmcache *k = KCMCACHE(id);
1053     krb5_storage *request;
1054
1055     ret = kcm_storage_request(context, KCM_OP_CHOWN, &request);
1056     if (ret)
1057         return ret;
1058
1059     ret = krb5_store_stringz(request, k->name);
1060     if (ret) {
1061         krb5_storage_free(request);
1062         return ret;
1063     }
1064
1065     ret = krb5_store_int32(request, uid);
1066     if (ret) {
1067         krb5_storage_free(request);
1068         return ret;
1069     }
1070
1071     ret = krb5_store_int32(request, gid);
1072     if (ret) {
1073         krb5_storage_free(request);
1074         return ret;
1075     }
1076
1077     ret = kcm_call(context, k, request, NULL, NULL);
1078
1079     krb5_storage_free(request);
1080     return ret;
1081 }
1082
1083
1084 /*
1085  * Request:
1086  *      NameZ
1087  *      ServerPrincipalPresent
1088  *      ServerPrincipal OPTIONAL
1089  *      Key
1090  *
1091  * Repsonse:
1092  *
1093  */
1094 krb5_error_code
1095 _krb5_kcm_get_initial_ticket(krb5_context context,
1096                              krb5_ccache id,
1097                              krb5_principal server,
1098                              krb5_keyblock *key)
1099 {
1100     krb5_kcmcache *k = KCMCACHE(id);
1101     krb5_error_code ret;
1102     krb5_storage *request;
1103
1104     ret = kcm_storage_request(context, KCM_OP_GET_INITIAL_TICKET, &request);
1105     if (ret)
1106         return ret;
1107
1108     ret = krb5_store_stringz(request, k->name);
1109     if (ret) {
1110         krb5_storage_free(request);
1111         return ret;
1112     }
1113
1114     ret = krb5_store_int8(request, (server == NULL) ? 0 : 1);
1115     if (ret) {
1116         krb5_storage_free(request);
1117         return ret;
1118     }
1119
1120     if (server != NULL) {
1121         ret = krb5_store_principal(request, server);
1122         if (ret) {
1123             krb5_storage_free(request);
1124             return ret;
1125         }
1126     }
1127
1128     ret = krb5_store_keyblock(request, *key);
1129     if (ret) {
1130         krb5_storage_free(request);
1131         return ret;
1132     }
1133
1134     ret = kcm_call(context, k, request, NULL, NULL);
1135
1136     krb5_storage_free(request);
1137     return ret;
1138 }
1139
1140
1141 /*
1142  * Request:
1143  *      NameZ
1144  *      KDCFlags
1145  *      EncryptionType
1146  *      ServerPrincipal
1147  *
1148  * Repsonse:
1149  *
1150  */
1151 krb5_error_code
1152 _krb5_kcm_get_ticket(krb5_context context,
1153                      krb5_ccache id,
1154                      krb5_kdc_flags flags,
1155                      krb5_enctype enctype,
1156                      krb5_principal server)
1157 {
1158     krb5_error_code ret;
1159     krb5_kcmcache *k = KCMCACHE(id);
1160     krb5_storage *request;
1161
1162     ret = kcm_storage_request(context, KCM_OP_GET_TICKET, &request);
1163     if (ret)
1164         return ret;
1165
1166     ret = krb5_store_stringz(request, k->name);
1167     if (ret) {
1168         krb5_storage_free(request);
1169         return ret;
1170     }
1171
1172     ret = krb5_store_int32(request, flags.i);
1173     if (ret) {
1174         krb5_storage_free(request);
1175         return ret;
1176     }
1177
1178     ret = krb5_store_int32(request, enctype);
1179     if (ret) {
1180         krb5_storage_free(request);
1181         return ret;
1182     }
1183
1184     ret = krb5_store_principal(request, server);
1185     if (ret) {
1186         krb5_storage_free(request);
1187         return ret;
1188     }
1189
1190     ret = kcm_call(context, k, request, NULL, NULL);
1191
1192     krb5_storage_free(request);
1193     return ret;
1194 }
1195
1196 #endif /* HAVE_KCM */