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