crypto/dist/heimdal/lib/krb5/acache.c

   1 /*
   2  * Copyright (c) 2004 - 2007 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "krb5_locl.h"
  35 #include <krb5_ccapi.h>
  36 #ifdef HAVE_DLFCN_H
  37 #include <dlfcn.h>
  38 #endif
  39
  40 __RCSID("$Heimdal: acache.c 22099 2007-12-03 17:14:34Z lha $"
  41         "$NetBSD$");
  42
  43 /* XXX should we fetch these for each open ? */
  44 static HEIMDAL_MUTEX acc_mutex = HEIMDAL_MUTEX_INITIALIZER;
  45 static cc_initialize_func init_func;
  46
  47 #ifdef HAVE_DLOPEN
  48 static void *cc_handle;
  49 #endif
  50
  51 typedef struct krb5_acc {
  52     char *cache_name;
  53     cc_context_t context;
  54     cc_ccache_t ccache;
  55 } krb5_acc;
  56
  57 static krb5_error_code acc_close(krb5_context, krb5_ccache);
  58
  59 #define ACACHE(X) ((krb5_acc *)(X)->data.data)
  60
  61 static const struct {
  62     cc_int32 error;
  63     krb5_error_code ret;
  64 } cc_errors[] = {
  65     { ccErrBadName,             KRB5_CC_BADNAME },
  66     { ccErrCredentialsNotFound, KRB5_CC_NOTFOUND },
  67     { ccErrCCacheNotFound,      KRB5_FCC_NOFILE },
  68     { ccErrContextNotFound,     KRB5_CC_NOTFOUND },
  69     { ccIteratorEnd,            KRB5_CC_END },
  70     { ccErrNoMem,               KRB5_CC_NOMEM },
  71     { ccErrServerUnavailable,   KRB5_CC_NOSUPP },
  72     { ccNoError,                0 }
  73 };
  74
  75 static krb5_error_code
  76 translate_cc_error(krb5_context context, cc_int32 error)
  77 {
  78     int i;
  79     krb5_clear_error_string(context);
  80     for(i = 0; i < sizeof(cc_errors)/sizeof(cc_errors[0]); i++)
  81         if (cc_errors[i].error == error)
  82             return cc_errors[i].ret;
  83     return KRB5_FCC_INTERNAL;
  84 }
  85
  86 static krb5_error_code
  87 init_ccapi(krb5_context context)
  88 {
  89     const char *lib;
  90
  91     HEIMDAL_MUTEX_lock(&acc_mutex);
  92     if (init_func) {
  93         HEIMDAL_MUTEX_unlock(&acc_mutex);
  94         krb5_clear_error_string(context);
  95         return 0;
  96     }
  97
  98     lib = krb5_config_get_string(context, NULL,
  99                                  "libdefaults", "ccapi_library",
 100                                  NULL);
 101     if (lib == NULL) {
 102 #ifdef __APPLE__
 103         lib = "/System/Library/Frameworks/Kerberos.framework/Kerberos";
 104 #else
 105         lib = "/usr/lib/libkrb5_cc.so";
 106 #endif
 107     }
 108
 109 #ifdef HAVE_DLOPEN
 110
 111 #ifndef RTLD_LAZY
 112 #define RTLD_LAZY 0
 113 #endif
 114
 115     cc_handle = dlopen(lib, RTLD_LAZY);
 116     if (cc_handle == NULL) {
 117         HEIMDAL_MUTEX_unlock(&acc_mutex);
 118         krb5_set_error_string(context, "Failed to load %s", lib);
 119         return KRB5_CC_NOSUPP;
 120     }
 121
 122     init_func = (cc_initialize_func)dlsym(cc_handle, "cc_initialize");
 123     HEIMDAL_MUTEX_unlock(&acc_mutex);
 124     if (init_func == NULL) {
 125         krb5_set_error_string(context, "Failed to find cc_initialize"
 126                               "in %s: %s", lib, dlerror());
 127         dlclose(cc_handle);
 128         return KRB5_CC_NOSUPP;
 129     }
 130
 131     return 0;
 132 #else
 133     HEIMDAL_MUTEX_unlock(&acc_mutex);
 134     krb5_set_error_string(context, "no support for shared object");
 135     return KRB5_CC_NOSUPP;
 136 #endif
 137 }
 138
 139 static krb5_error_code
 140 make_cred_from_ccred(krb5_context context,
 141                      const cc_credentials_v5_t *incred,
 142                      krb5_creds *cred)
 143 {
 144     krb5_error_code ret;
 145     int i;
 146
 147     memset(cred, 0, sizeof(*cred));
 148
 149     ret = krb5_parse_name(context, incred->client, &cred->client);
 150     if (ret)
 151         goto fail;
 152
 153     ret = krb5_parse_name(context, incred->server, &cred->server);
 154     if (ret)
 155         goto fail;
 156
 157     cred->session.keytype = incred->keyblock.type;
 158     cred->session.keyvalue.length = incred->keyblock.length;
 159     cred->session.keyvalue.data = malloc(incred->keyblock.length);
 160     if (cred->session.keyvalue.data == NULL)
 161         goto nomem;
 162     memcpy(cred->session.keyvalue.data, incred->keyblock.data,
 163            incred->keyblock.length);
 164
 165     cred->times.authtime = incred->authtime;
 166     cred->times.starttime = incred->starttime;
 167     cred->times.endtime = incred->endtime;
 168     cred->times.renew_till = incred->renew_till;
 169
 170     ret = krb5_data_copy(&cred->ticket,
 171                          incred->ticket.data,
 172                          incred->ticket.length);
 173     if (ret)
 174         goto nomem;
 175
 176     ret = krb5_data_copy(&cred->second_ticket,
 177                          incred->second_ticket.data,
 178                          incred->second_ticket.length);
 179     if (ret)
 180         goto nomem;
 181
 182     cred->authdata.val = NULL;
 183     cred->authdata.len = 0;
 184
 185     cred->addresses.val = NULL;
 186     cred->addresses.len = 0;
 187
 188     for (i = 0; incred->authdata && incred->authdata[i]; i++)
 189         ;
 190
 191     if (i) {
 192         cred->authdata.val = calloc(i, sizeof(cred->authdata.val[0]));
 193         if (cred->authdata.val == NULL)
 194             goto nomem;
 195         cred->authdata.len = i;
 196         for (i = 0; i < cred->authdata.len; i++) {
 197             cred->authdata.val[i].ad_type = incred->authdata[i]->type;
 198             ret = krb5_data_copy(&cred->authdata.val[i].ad_data,
 199                                  incred->authdata[i]->data,
 200                                  incred->authdata[i]->length);
 201             if (ret)
 202                 goto nomem;
 203         }
 204     }
 205
 206     for (i = 0; incred->addresses && incred->addresses[i]; i++)
 207         ;
 208
 209     if (i) {
 210         cred->addresses.val = calloc(i, sizeof(cred->addresses.val[0]));
 211         if (cred->addresses.val == NULL)
 212             goto nomem;
 213         cred->addresses.len = i;
 214
 215         for (i = 0; i < cred->addresses.len; i++) {
 216             cred->addresses.val[i].addr_type = incred->addresses[i]->type;
 217             ret = krb5_data_copy(&cred->addresses.val[i].address,
 218                                  incred->addresses[i]->data,
 219                                  incred->addresses[i]->length);
 220             if (ret)
 221                 goto nomem;
 222         }
 223     }
 224
 225     cred->flags.i = 0;
 226     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_FORWARDABLE)
 227         cred->flags.b.forwardable = 1;
 228     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_FORWARDED)
 229         cred->flags.b.forwarded = 1;
 230     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_PROXIABLE)
 231         cred->flags.b.proxiable = 1;
 232     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_PROXY)
 233         cred->flags.b.proxy = 1;
 234     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_MAY_POSTDATE)
 235         cred->flags.b.may_postdate = 1;
 236     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_POSTDATED)
 237         cred->flags.b.postdated = 1;
 238     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_INVALID)
 239         cred->flags.b.invalid = 1;
 240     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_RENEWABLE)
 241         cred->flags.b.renewable = 1;
 242     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_INITIAL)
 243         cred->flags.b.initial = 1;
 244     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_PRE_AUTH)
 245         cred->flags.b.pre_authent = 1;
 246     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_HW_AUTH)
 247         cred->flags.b.hw_authent = 1;
 248     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_TRANSIT_POLICY_CHECKED)
 249         cred->flags.b.transited_policy_checked = 1;
 250     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_OK_AS_DELEGATE)
 251         cred->flags.b.ok_as_delegate = 1;
 252     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_ANONYMOUS)
 253         cred->flags.b.anonymous = 1;
 254
 255     return 0;
 256
 257 nomem:
 258     ret = ENOMEM;
 259     krb5_set_error_string(context, "malloc - out of memory");
 260
 261 fail:
 262     krb5_free_cred_contents(context, cred);
 263     return ret;
 264 }
 265
 266 static void
 267 free_ccred(cc_credentials_v5_t *cred)
 268 {
 269     int i;
 270
 271     if (cred->addresses) {
 272         for (i = 0; cred->addresses[i] != 0; i++) {
 273             if (cred->addresses[i]->data)
 274                 free(cred->addresses[i]->data);
 275             free(cred->addresses[i]);
 276         }
 277         free(cred->addresses);
 278     }
 279     if (cred->server)
 280         free(cred->server);
 281     if (cred->client)
 282         free(cred->client);
 283     memset(cred, 0, sizeof(*cred));
 284 }
 285
 286 static krb5_error_code
 287 make_ccred_from_cred(krb5_context context,
 288                      const krb5_creds *incred,
 289                      cc_credentials_v5_t *cred)
 290 {
 291     krb5_error_code ret;
 292     int i;
 293
 294     memset(cred, 0, sizeof(*cred));
 295
 296     ret = krb5_unparse_name(context, incred->client, &cred->client);
 297     if (ret)
 298         goto fail;
 299
 300     ret = krb5_unparse_name(context, incred->server, &cred->server);
 301     if (ret)
 302         goto fail;
 303
 304     cred->keyblock.type = incred->session.keytype;
 305     cred->keyblock.length = incred->session.keyvalue.length;
 306     cred->keyblock.data = incred->session.keyvalue.data;
 307
 308     cred->authtime = incred->times.authtime;
 309     cred->starttime = incred->times.starttime;
 310     cred->endtime = incred->times.endtime;
 311     cred->renew_till = incred->times.renew_till;
 312
 313     cred->ticket.length = incred->ticket.length;
 314     cred->ticket.data = incred->ticket.data;
 315
 316     cred->second_ticket.length = incred->second_ticket.length;
 317     cred->second_ticket.data = incred->second_ticket.data;
 318
 319     /* XXX this one should also be filled in */
 320     cred->authdata = NULL;
 321
 322     cred->addresses = calloc(incred->addresses.len + 1,
 323                              sizeof(cred->addresses[0]));
 324     if (cred->addresses == NULL) {
 325
 326         ret = ENOMEM;
 327         goto fail;
 328     }
 329
 330     for (i = 0; i < incred->addresses.len; i++) {
 331         cc_data *addr;
 332         addr = malloc(sizeof(*addr));
 333         if (addr == NULL) {
 334             ret = ENOMEM;
 335             goto fail;
 336         }
 337         addr->type = incred->addresses.val[i].addr_type;
 338         addr->length = incred->addresses.val[i].address.length;
 339         addr->data = malloc(addr->length);
 340         if (addr->data == NULL) {
 341             ret = ENOMEM;
 342             goto fail;
 343         }
 344         memcpy(addr->data, incred->addresses.val[i].address.data,
 345                addr->length);
 346         cred->addresses[i] = addr;
 347     }
 348     cred->addresses[i] = NULL;
 349
 350     cred->ticket_flags = 0;
 351     if (incred->flags.b.forwardable)
 352         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_FORWARDABLE;
 353     if (incred->flags.b.forwarded)
 354         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_FORWARDED;
 355     if (incred->flags.b.proxiable)
 356         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_PROXIABLE;
 357     if (incred->flags.b.proxy)
 358         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_PROXY;
 359     if (incred->flags.b.may_postdate)
 360         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_MAY_POSTDATE;
 361     if (incred->flags.b.postdated)
 362         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_POSTDATED;
 363     if (incred->flags.b.invalid)
 364         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_INVALID;
 365     if (incred->flags.b.renewable)
 366         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_RENEWABLE;
 367     if (incred->flags.b.initial)
 368         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_INITIAL;
 369     if (incred->flags.b.pre_authent)
 370         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_PRE_AUTH;
 371     if (incred->flags.b.hw_authent)
 372         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_HW_AUTH;
 373     if (incred->flags.b.transited_policy_checked)
 374         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_TRANSIT_POLICY_CHECKED;
 375     if (incred->flags.b.ok_as_delegate)
 376         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_OK_AS_DELEGATE;
 377     if (incred->flags.b.anonymous)
 378         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_ANONYMOUS;
 379
 380     return 0;
 381
 382 fail:
 383     free_ccred(cred);
 384
 385     krb5_clear_error_string(context);
 386     return ret;
 387 }
 388
 389 static char *
 390 get_cc_name(cc_ccache_t cache)
 391 {
 392     cc_string_t name;
 393     cc_int32 error;
 394     char *str;
 395
 396     error = (*cache->func->get_name)(cache, &name);
 397     if (error)
 398         return NULL;
 399
 400     str = strdup(name->data);
 401     (*name->func->release)(name);
 402     return str;
 403 }
 404
 405
 406 static const char*
 407 acc_get_name(krb5_context context,
 408              krb5_ccache id)
 409 {
 410     krb5_acc *a = ACACHE(id);
 411     static char n[255];
 412     char *name;
 413
 414     name = get_cc_name(a->ccache);
 415     if (name == NULL) {
 416         krb5_set_error_string(context, "malloc: out of memory");
 417         return NULL;
 418     }
 419     strlcpy(n, name, sizeof(n));
 420     free(name);
 421     return n;
 422 }
 423
 424 static krb5_error_code
 425 acc_alloc(krb5_context context, krb5_ccache *id)
 426 {
 427     krb5_error_code ret;
 428     cc_int32 error;
 429     krb5_acc *a;
 430
 431     ret = init_ccapi(context);
 432     if (ret)
 433         return ret;
 434
 435     ret = krb5_data_alloc(&(*id)->data, sizeof(*a));
 436     if (ret) {
 437         krb5_clear_error_string(context);
 438         return ret;
 439     }
 440
 441     a = ACACHE(*id);
 442
 443     error = (*init_func)(&a->context, ccapi_version_3, NULL, NULL);
 444     if (error) {
 445         krb5_data_free(&(*id)->data);
 446         return translate_cc_error(context, error);
 447     }
 448
 449     a->cache_name = NULL;
 450
 451     return 0;
 452 }
 453
 454 static krb5_error_code
 455 acc_resolve(krb5_context context, krb5_ccache *id, const char *res)
 456 {
 457     krb5_error_code ret;
 458     cc_int32 error;
 459     krb5_acc *a;
 460
 461     ret = acc_alloc(context, id);
 462     if (ret)
 463         return ret;
 464
 465     a = ACACHE(*id);
 466
 467     error = (*a->context->func->open_ccache)(a->context, res,
 468                                              &a->ccache);
 469     if (error == 0) {
 470         a->cache_name = get_cc_name(a->ccache);
 471         if (a->cache_name == NULL) {
 472             acc_close(context, *id);
 473             *id = NULL;
 474             krb5_set_error_string(context, "malloc: out of memory");
 475             return ENOMEM;
 476         }
 477     } else if (error == ccErrCCacheNotFound) {
 478         a->ccache = NULL;
 479         a->cache_name = NULL;
 480         error = 0;
 481     } else {
 482         *id = NULL;
 483         return translate_cc_error(context, error);
 484     }
 485
 486     return 0;
 487 }
 488
 489 static krb5_error_code
 490 acc_gen_new(krb5_context context, krb5_ccache *id)
 491 {
 492     krb5_error_code ret;
 493     krb5_acc *a;
 494
 495     ret = acc_alloc(context, id);
 496     if (ret)
 497         return ret;
 498
 499     a = ACACHE(*id);
 500
 501     a->ccache = NULL;
 502     a->cache_name = NULL;
 503
 504     return 0;
 505 }
 506
 507 static krb5_error_code
 508 acc_initialize(krb5_context context,
 509                krb5_ccache id,
 510                krb5_principal primary_principal)
 511 {
 512     krb5_acc *a = ACACHE(id);
 513     krb5_error_code ret;
 514     int32_t error;
 515     char *name;
 516
 517     ret = krb5_unparse_name(context, primary_principal, &name);
 518     if (ret)
 519         return ret;
 520
 521     error = (*a->context->func->create_new_ccache)(a->context,
 522                                                    cc_credentials_v5,
 523                                                    name,
 524                                                    &a->ccache);
 525     free(name);
 526
 527     return translate_cc_error(context, error);
 528 }
 529
 530 static krb5_error_code
 531 acc_close(krb5_context context,
 532           krb5_ccache id)
 533 {
 534     krb5_acc *a = ACACHE(id);
 535
 536     if (a->ccache) {
 537         (*a->ccache->func->release)(a->ccache);
 538         a->ccache = NULL;
 539     }
 540     if (a->cache_name) {
 541         free(a->cache_name);
 542         a->cache_name = NULL;
 543     }
 544     (*a->context->func->release)(a->context);
 545     a->context = NULL;
 546     krb5_data_free(&id->data);
 547     return 0;
 548 }
 549
 550 static krb5_error_code
 551 acc_destroy(krb5_context context,
 552             krb5_ccache id)
 553 {
 554     krb5_acc *a = ACACHE(id);
 555     cc_int32 error = 0;
 556
 557     if (a->ccache) {
 558         error = (*a->ccache->func->destroy)(a->ccache);
 559         a->ccache = NULL;
 560     }
 561     if (a->context) {
 562         error = (a->context->func->release)(a->context);
 563         a->context = NULL;
 564     }
 565     return translate_cc_error(context, error);
 566 }
 567
 568 static krb5_error_code
 569 acc_store_cred(krb5_context context,
 570                krb5_ccache id,
 571                krb5_creds *creds)
 572 {
 573     krb5_acc *a = ACACHE(id);
 574     cc_credentials_union cred;
 575     cc_credentials_v5_t v5cred;
 576     krb5_error_code ret;
 577     cc_int32 error;
 578
 579     if (a->ccache == NULL) {
 580         krb5_set_error_string(context, "No API credential found");
 581         return KRB5_CC_NOTFOUND;
 582     }
 583
 584     cred.version = cc_credentials_v5;
 585     cred.credentials.credentials_v5 = &v5cred;
 586
 587     ret = make_ccred_from_cred(context,
 588                                creds,
 589                                &v5cred);
 590     if (ret)
 591         return ret;
 592
 593     error = (*a->ccache->func->store_credentials)(a->ccache, &cred);
 594     if (error)
 595         ret = translate_cc_error(context, error);
 596
 597     free_ccred(&v5cred);
 598
 599     return ret;
 600 }
 601
 602 static krb5_error_code
 603 acc_get_principal(krb5_context context,
 604                   krb5_ccache id,
 605                   krb5_principal *principal)
 606 {
 607     krb5_acc *a = ACACHE(id);
 608     krb5_error_code ret;
 609     int32_t error;
 610     cc_string_t name;
 611
 612     if (a->ccache == NULL) {
 613         krb5_set_error_string(context, "No API credential found");
 614         return KRB5_CC_NOTFOUND;
 615     }
 616
 617     error = (*a->ccache->func->get_principal)(a->ccache,
 618                                               cc_credentials_v5,
 619                                               &name);
 620     if (error)
 621         return translate_cc_error(context, error);
 622
 623     ret = krb5_parse_name(context, name->data, principal);
 624
 625     (*name->func->release)(name);
 626     return ret;
 627 }
 628
 629 static krb5_error_code
 630 acc_get_first (krb5_context context,
 631                krb5_ccache id,
 632                krb5_cc_cursor *cursor)
 633 {
 634     cc_credentials_iterator_t iter;
 635     krb5_acc *a = ACACHE(id);
 636     int32_t error;
 637
 638     if (a->ccache == NULL) {
 639         krb5_set_error_string(context, "No API credential found");
 640         return KRB5_CC_NOTFOUND;
 641     }
 642
 643     error = (*a->ccache->func->new_credentials_iterator)(a->ccache, &iter);
 644     if (error) {
 645         krb5_clear_error_string(context);
 646         return ENOENT;
 647     }
 648     *cursor = iter;
 649     return 0;
 650 }
 651
 652
 653 static krb5_error_code
 654 acc_get_next (krb5_context context,
 655               krb5_ccache id,
 656               krb5_cc_cursor *cursor,
 657               krb5_creds *creds)
 658 {
 659     cc_credentials_iterator_t iter = *cursor;
 660     cc_credentials_t cred;
 661     krb5_error_code ret;
 662     int32_t error;
 663
 664     while (1) {
 665         error = (*iter->func->next)(iter, &cred);
 666         if (error)
 667             return translate_cc_error(context, error);
 668         if (cred->data->version == cc_credentials_v5)
 669             break;
 670         (*cred->func->release)(cred);
 671     }
 672
 673     ret = make_cred_from_ccred(context,
 674                                cred->data->credentials.credentials_v5,
 675                                creds);
 676     (*cred->func->release)(cred);
 677     return ret;
 678 }
 679
 680 static krb5_error_code
 681 acc_end_get (krb5_context context,
 682              krb5_ccache id,
 683              krb5_cc_cursor *cursor)
 684 {
 685     cc_credentials_iterator_t iter = *cursor;
 686     (*iter->func->release)(iter);
 687     return 0;
 688 }
 689
 690 static krb5_error_code
 691 acc_remove_cred(krb5_context context,
 692                 krb5_ccache id,
 693                 krb5_flags which,
 694                 krb5_creds *cred)
 695 {
 696     cc_credentials_iterator_t iter;
 697     krb5_acc *a = ACACHE(id);
 698     cc_credentials_t ccred;
 699     krb5_error_code ret;
 700     cc_int32 error;
 701     char *client, *server;
 702
 703     if (a->ccache == NULL) {
 704         krb5_set_error_string(context, "No API credential found");
 705         return KRB5_CC_NOTFOUND;
 706     }
 707
 708     if (cred->client) {
 709         ret = krb5_unparse_name(context, cred->client, &client);
 710         if (ret)
 711             return ret;
 712     } else
 713         client = NULL;
 714
 715     ret = krb5_unparse_name(context, cred->server, &server);
 716     if (ret) {
 717         free(client);
 718         return ret;
 719     }
 720
 721     error = (*a->ccache->func->new_credentials_iterator)(a->ccache, &iter);
 722     if (error) {
 723         free(server);
 724         free(client);
 725         return translate_cc_error(context, error);
 726     }
 727
 728     ret = KRB5_CC_NOTFOUND;
 729     while (1) {
 730         cc_credentials_v5_t *v5cred;
 731
 732         error = (*iter->func->next)(iter, &ccred);
 733         if (error)
 734             break;
 735
 736         if (ccred->data->version != cc_credentials_v5)
 737             goto next;
 738
 739         v5cred = ccred->data->credentials.credentials_v5;
 740
 741         if (client && strcmp(v5cred->client, client) != 0)
 742             goto next;
 743
 744         if (strcmp(v5cred->server, server) != 0)
 745             goto next;
 746
 747         (*a->ccache->func->remove_credentials)(a->ccache, ccred);
 748         ret = 0;
 749     next:
 750         (*ccred->func->release)(ccred);
 751     }
 752
 753     (*iter->func->release)(iter);
 754
 755     if (ret)
 756         krb5_set_error_string(context, "Can't find credential %s in cache",
 757                               server);
 758     free(server);
 759     free(client);
 760
 761     return ret;
 762 }
 763
 764 static krb5_error_code
 765 acc_set_flags(krb5_context context,
 766               krb5_ccache id,
 767               krb5_flags flags)
 768 {
 769     return 0;
 770 }
 771
 772 static krb5_error_code
 773 acc_get_version(krb5_context context,
 774                 krb5_ccache id)
 775 {
 776     return 0;
 777 }
 778
 779 struct cache_iter {
 780     cc_context_t context;
 781     cc_ccache_iterator_t iter;
 782 };
 783
 784 static krb5_error_code
 785 acc_get_cache_first(krb5_context context, krb5_cc_cursor *cursor)
 786 {
 787     struct cache_iter *iter;
 788     krb5_error_code ret;
 789     cc_int32 error;
 790
 791     ret = init_ccapi(context);
 792     if (ret)
 793         return ret;
 794
 795     iter = calloc(1, sizeof(*iter));
 796     if (iter == NULL) {
 797         krb5_set_error_string(context, "malloc - out of memory");
 798         return ENOMEM;
 799     }
 800
 801     error = (*init_func)(&iter->context, ccapi_version_3, NULL, NULL);
 802     if (error) {
 803         free(iter);
 804         return translate_cc_error(context, error);
 805     }
 806
 807     error = (*iter->context->func->new_ccache_iterator)(iter->context,
 808                                                         &iter->iter);
 809     if (error) {
 810         free(iter);
 811         krb5_clear_error_string(context);
 812         return ENOENT;
 813     }
 814     *cursor = iter;
 815     return 0;
 816 }
 817
 818 static krb5_error_code
 819 acc_get_cache_next(krb5_context context, krb5_cc_cursor cursor, krb5_ccache *id)
 820 {
 821     struct cache_iter *iter = cursor;
 822     cc_ccache_t cache;
 823     krb5_acc *a;
 824     krb5_error_code ret;
 825     int32_t error;
 826
 827     error = (*iter->iter->func->next)(iter->iter, &cache);
 828     if (error)
 829         return translate_cc_error(context, error);
 830
 831     ret = _krb5_cc_allocate(context, &krb5_acc_ops, id);
 832     if (ret) {
 833         (*cache->func->release)(cache);
 834         return ret;
 835     }
 836
 837     ret = acc_alloc(context, id);
 838     if (ret) {
 839         (*cache->func->release)(cache);
 840         free(*id);
 841         return ret;
 842     }
 843
 844     a = ACACHE(*id);
 845     a->ccache = cache;
 846
 847     a->cache_name = get_cc_name(a->ccache);
 848     if (a->cache_name == NULL) {
 849         acc_close(context, *id);
 850         *id = NULL;
 851         krb5_set_error_string(context, "malloc: out of memory");
 852         return ENOMEM;
 853     }
 854     return 0;
 855 }
 856
 857 static krb5_error_code
 858 acc_end_cache_get(krb5_context context, krb5_cc_cursor cursor)
 859 {
 860     struct cache_iter *iter = cursor;
 861
 862     (*iter->iter->func->release)(iter->iter);
 863     iter->iter = NULL;
 864     (*iter->context->func->release)(iter->context);
 865     iter->context = NULL;
 866     free(iter);
 867     return 0;
 868 }
 869
 870 static krb5_error_code
 871 acc_move(krb5_context context, krb5_ccache from, krb5_ccache to)
 872 {
 873     krb5_acc *afrom = ACACHE(from);
 874     krb5_acc *ato = ACACHE(to);
 875     int32_t error;
 876
 877     if (ato->ccache == NULL) {
 878         cc_string_t name;
 879
 880         error = (*afrom->ccache->func->get_principal)(afrom->ccache,
 881                                                       cc_credentials_v5,
 882                                                       &name);
 883         if (error)
 884             return translate_cc_error(context, error);
 885
 886         error = (*ato->context->func->create_new_ccache)(ato->context,
 887                                                          cc_credentials_v5,
 888                                                          name->data,
 889                                                          &ato->ccache);
 890         (*name->func->release)(name);
 891         if (error)
 892             return translate_cc_error(context, error);
 893     }
 894
 895
 896     error = (*ato->ccache->func->move)(afrom->ccache, ato->ccache);
 897     return translate_cc_error(context, error);
 898 }
 899
 900 static krb5_error_code
 901 acc_default_name(krb5_context context, char **str)
 902 {
 903     krb5_error_code ret;
 904     cc_context_t cc;
 905     cc_string_t name;
 906     int32_t error;
 907
 908     ret = init_ccapi(context);
 909     if (ret)
 910         return ret;
 911
 912     error = (*init_func)(&cc, ccapi_version_3, NULL, NULL);
 913     if (error)
 914         return translate_cc_error(context, error);
 915
 916     error = (*cc->func->get_default_ccache_name)(cc, &name);
 917     if (error) {
 918         (*cc->func->release)(cc);
 919         return translate_cc_error(context, error);
 920     }
 921
 922     asprintf(str, "API:%s", name->data);
 923     (*name->func->release)(name);
 924     (*cc->func->release)(cc);
 925
 926     if (*str == NULL) {
 927         krb5_set_error_string(context, "out of memory");
 928         return ENOMEM;
 929     }
 930     return 0;
 931 }
 932
 933
 934 /**
 935  * Variable containing the API based credential cache implemention.
 936  *
 937  * @ingroup krb5_ccache
 938  */
 939
 940 const krb5_cc_ops krb5_acc_ops = {
 941     "API",
 942     acc_get_name,
 943     acc_resolve,
 944     acc_gen_new,
 945     acc_initialize,
 946     acc_destroy,
 947     acc_close,
 948     acc_store_cred,
 949     NULL, /* acc_retrieve */
 950     acc_get_principal,
 951     acc_get_first,
 952     acc_get_next,
 953     acc_end_get,
 954     acc_remove_cred,
 955     acc_set_flags,
 956     acc_get_version,
 957     acc_get_cache_first,
 958     acc_get_cache_next,
 959     acc_end_cache_get,
 960     acc_move,
 961     acc_default_name
 962 };