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  * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "krb5_locl.h"
  37 #include <krb5_ccapi.h>
  38 #ifdef HAVE_DLFCN_H
  39 #include <dlfcn.h>
  40 #endif
  41
  42 #ifndef KCM_IS_API_CACHE
  43
  44 static HEIMDAL_MUTEX acc_mutex = HEIMDAL_MUTEX_INITIALIZER;
  45 static cc_initialize_func init_func;
  46 static void (KRB5_CALLCONV *set_target_uid)(uid_t);
  47 static void (KRB5_CALLCONV *clear_target)(void);
  48
  49 #ifdef HAVE_DLOPEN
  50 static void *cc_handle;
  51 #endif
  52
  53 typedef struct krb5_acc {
  54     char *cache_name;
  55     cc_context_t context;
  56     cc_ccache_t ccache;
  57 } krb5_acc;
  58
  59 static krb5_error_code KRB5_CALLCONV acc_close(krb5_context, krb5_ccache);
  60
  61 #define ACACHE(X) ((krb5_acc *)(X)->data.data)
  62
  63 static const struct {
  64     cc_int32 error;
  65     krb5_error_code ret;
  66 } cc_errors[] = {
  67     { ccErrBadName,             KRB5_CC_BADNAME },
  68     { ccErrCredentialsNotFound, KRB5_CC_NOTFOUND },
  69     { ccErrCCacheNotFound,      KRB5_FCC_NOFILE },
  70     { ccErrContextNotFound,     KRB5_CC_NOTFOUND },
  71     { ccIteratorEnd,            KRB5_CC_END },
  72     { ccErrNoMem,               KRB5_CC_NOMEM },
  73     { ccErrServerUnavailable,   KRB5_CC_NOSUPP },
  74     { ccErrInvalidCCache,       KRB5_CC_BADNAME },
  75     { ccNoError,                0 }
  76 };
  77
  78 static krb5_error_code
  79 translate_cc_error(krb5_context context, cc_int32 error)
  80 {
  81     int i;
  82     krb5_clear_error_message(context);
  83     for(i = 0; i < sizeof(cc_errors)/sizeof(cc_errors[0]); i++)
  84         if (cc_errors[i].error == error)
  85             return cc_errors[i].ret;
  86     return KRB5_FCC_INTERNAL;
  87 }
  88
  89 static krb5_error_code
  90 init_ccapi(krb5_context context)
  91 {
  92     const char *lib = NULL;
  93
  94     HEIMDAL_MUTEX_lock(&acc_mutex);
  95     if (init_func) {
  96         HEIMDAL_MUTEX_unlock(&acc_mutex);
  97         if (context)
  98             krb5_clear_error_message(context);
  99         return 0;
 100     }
 101
 102     if (context)
 103         lib = krb5_config_get_string(context, NULL,
 104                                      "libdefaults", "ccapi_library",
 105                                      NULL);
 106     if (lib == NULL) {
 107 #ifdef __APPLE__
 108         lib = "/System/Library/Frameworks/Kerberos.framework/Kerberos";
 109 #elif defined(KRB5_USE_PATH_TOKENS) && defined(_WIN32)
 110         lib = "%{LIBDIR}/libkrb5_cc.dll";
 111 #else
 112         lib = "/usr/lib/libkrb5_cc.so";
 113 #endif
 114     }
 115
 116 #ifdef HAVE_DLOPEN
 117
 118 #ifndef RTLD_LAZY
 119 #define RTLD_LAZY 0
 120 #endif
 121 #ifndef RTLD_LOCAL
 122 #define RTLD_LOCAL 0
 123 #endif
 124
 125 #ifdef KRB5_USE_PATH_TOKENS
 126     {
 127       char * explib = NULL;
 128       if (_krb5_expand_path_tokens(context, lib, &explib) == 0) {
 129         cc_handle = dlopen(explib, RTLD_LAZY|RTLD_LOCAL);
 130         free(explib);
 131       }
 132     }
 133 #else
 134     cc_handle = dlopen(lib, RTLD_LAZY|RTLD_LOCAL);
 135 #endif
 136
 137     if (cc_handle == NULL) {
 138         HEIMDAL_MUTEX_unlock(&acc_mutex);
 139         if (context)
 140             krb5_set_error_message(context, KRB5_CC_NOSUPP,
 141                                    N_("Failed to load API cache module %s", "file"),
 142                                    lib);
 143         return KRB5_CC_NOSUPP;
 144     }
 145
 146     init_func = (cc_initialize_func)dlsym(cc_handle, "cc_initialize");
 147     set_target_uid = (void (KRB5_CALLCONV *)(uid_t))
 148         dlsym(cc_handle, "krb5_ipc_client_set_target_uid");
 149     clear_target = (void (KRB5_CALLCONV *)(void))
 150         dlsym(cc_handle, "krb5_ipc_client_clear_target");
 151     HEIMDAL_MUTEX_unlock(&acc_mutex);
 152     if (init_func == NULL) {
 153         if (context)
 154             krb5_set_error_message(context, KRB5_CC_NOSUPP,
 155                                    N_("Failed to find cc_initialize"
 156                                       "in %s: %s", "file, error"), lib, dlerror());
 157         dlclose(cc_handle);
 158         return KRB5_CC_NOSUPP;
 159     }
 160
 161     return 0;
 162 #else
 163     HEIMDAL_MUTEX_unlock(&acc_mutex);
 164     if (context)
 165         krb5_set_error_message(context, KRB5_CC_NOSUPP,
 166                                N_("no support for shared object", ""));
 167     return KRB5_CC_NOSUPP;
 168 #endif
 169 }
 170
 171 void
 172 _heim_krb5_ipc_client_set_target_uid(uid_t uid)
 173 {
 174     init_ccapi(NULL);
 175     if (set_target_uid != NULL)
 176         (*set_target_uid)(uid);
 177 }
 178
 179 void
 180 _heim_krb5_ipc_client_clear_target(void)
 181 {
 182     init_ccapi(NULL);
 183     if (clear_target != NULL)
 184         (*clear_target)();
 185 }
 186
 187 static krb5_error_code
 188 make_cred_from_ccred(krb5_context context,
 189                      const cc_credentials_v5_t *incred,
 190                      krb5_creds *cred)
 191 {
 192     krb5_error_code ret;
 193     unsigned int i;
 194
 195     memset(cred, 0, sizeof(*cred));
 196
 197     ret = krb5_parse_name(context, incred->client, &cred->client);
 198     if (ret)
 199         goto fail;
 200
 201     ret = krb5_parse_name(context, incred->server, &cred->server);
 202     if (ret)
 203         goto fail;
 204
 205     cred->session.keytype = incred->keyblock.type;
 206     cred->session.keyvalue.length = incred->keyblock.length;
 207     cred->session.keyvalue.data = malloc(incred->keyblock.length);
 208     if (cred->session.keyvalue.data == NULL)
 209         goto nomem;
 210     memcpy(cred->session.keyvalue.data, incred->keyblock.data,
 211            incred->keyblock.length);
 212
 213     cred->times.authtime = incred->authtime;
 214     cred->times.starttime = incred->starttime;
 215     cred->times.endtime = incred->endtime;
 216     cred->times.renew_till = incred->renew_till;
 217
 218     ret = krb5_data_copy(&cred->ticket,
 219                          incred->ticket.data,
 220                          incred->ticket.length);
 221     if (ret)
 222         goto nomem;
 223
 224     ret = krb5_data_copy(&cred->second_ticket,
 225                          incred->second_ticket.data,
 226                          incred->second_ticket.length);
 227     if (ret)
 228         goto nomem;
 229
 230     cred->authdata.val = NULL;
 231     cred->authdata.len = 0;
 232
 233     cred->addresses.val = NULL;
 234     cred->addresses.len = 0;
 235
 236     for (i = 0; incred->authdata && incred->authdata[i]; i++)
 237         ;
 238
 239     if (i) {
 240         cred->authdata.val = calloc(i, sizeof(cred->authdata.val[0]));
 241         if (cred->authdata.val == NULL)
 242             goto nomem;
 243         cred->authdata.len = i;
 244         for (i = 0; i < cred->authdata.len; i++) {
 245             cred->authdata.val[i].ad_type = incred->authdata[i]->type;
 246             ret = krb5_data_copy(&cred->authdata.val[i].ad_data,
 247                                  incred->authdata[i]->data,
 248                                  incred->authdata[i]->length);
 249             if (ret)
 250                 goto nomem;
 251         }
 252     }
 253
 254     for (i = 0; incred->addresses && incred->addresses[i]; i++)
 255         ;
 256
 257     if (i) {
 258         cred->addresses.val = calloc(i, sizeof(cred->addresses.val[0]));
 259         if (cred->addresses.val == NULL)
 260             goto nomem;
 261         cred->addresses.len = i;
 262
 263         for (i = 0; i < cred->addresses.len; i++) {
 264             cred->addresses.val[i].addr_type = incred->addresses[i]->type;
 265             ret = krb5_data_copy(&cred->addresses.val[i].address,
 266                                  incred->addresses[i]->data,
 267                                  incred->addresses[i]->length);
 268             if (ret)
 269                 goto nomem;
 270         }
 271     }
 272
 273     cred->flags.i = 0;
 274     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_FORWARDABLE)
 275         cred->flags.b.forwardable = 1;
 276     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_FORWARDED)
 277         cred->flags.b.forwarded = 1;
 278     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_PROXIABLE)
 279         cred->flags.b.proxiable = 1;
 280     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_PROXY)
 281         cred->flags.b.proxy = 1;
 282     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_MAY_POSTDATE)
 283         cred->flags.b.may_postdate = 1;
 284     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_POSTDATED)
 285         cred->flags.b.postdated = 1;
 286     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_INVALID)
 287         cred->flags.b.invalid = 1;
 288     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_RENEWABLE)
 289         cred->flags.b.renewable = 1;
 290     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_INITIAL)
 291         cred->flags.b.initial = 1;
 292     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_PRE_AUTH)
 293         cred->flags.b.pre_authent = 1;
 294     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_HW_AUTH)
 295         cred->flags.b.hw_authent = 1;
 296     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_TRANSIT_POLICY_CHECKED)
 297         cred->flags.b.transited_policy_checked = 1;
 298     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_OK_AS_DELEGATE)
 299         cred->flags.b.ok_as_delegate = 1;
 300     if (incred->ticket_flags & KRB5_CCAPI_TKT_FLG_ANONYMOUS)
 301         cred->flags.b.anonymous = 1;
 302
 303     return 0;
 304
 305 nomem:
 306     ret = ENOMEM;
 307     krb5_set_error_message(context, ret, N_("malloc: out of memory", "malloc"));
 308
 309 fail:
 310     krb5_free_cred_contents(context, cred);
 311     return ret;
 312 }
 313
 314 static void
 315 free_ccred(cc_credentials_v5_t *cred)
 316 {
 317     int i;
 318
 319     if (cred->addresses) {
 320         for (i = 0; cred->addresses[i] != 0; i++) {
 321             if (cred->addresses[i]->data)
 322                 free(cred->addresses[i]->data);
 323             free(cred->addresses[i]);
 324         }
 325         free(cred->addresses);
 326     }
 327     if (cred->server)
 328         free(cred->server);
 329     if (cred->client)
 330         free(cred->client);
 331     memset(cred, 0, sizeof(*cred));
 332 }
 333
 334 static krb5_error_code
 335 make_ccred_from_cred(krb5_context context,
 336                      const krb5_creds *incred,
 337                      cc_credentials_v5_t *cred)
 338 {
 339     krb5_error_code ret;
 340     int i;
 341
 342     memset(cred, 0, sizeof(*cred));
 343
 344     ret = krb5_unparse_name(context, incred->client, &cred->client);
 345     if (ret)
 346         goto fail;
 347
 348     ret = krb5_unparse_name(context, incred->server, &cred->server);
 349     if (ret)
 350         goto fail;
 351
 352     cred->keyblock.type = incred->session.keytype;
 353     cred->keyblock.length = incred->session.keyvalue.length;
 354     cred->keyblock.data = incred->session.keyvalue.data;
 355
 356     cred->authtime = incred->times.authtime;
 357     cred->starttime = incred->times.starttime;
 358     cred->endtime = incred->times.endtime;
 359     cred->renew_till = incred->times.renew_till;
 360
 361     cred->ticket.length = incred->ticket.length;
 362     cred->ticket.data = incred->ticket.data;
 363
 364     cred->second_ticket.length = incred->second_ticket.length;
 365     cred->second_ticket.data = incred->second_ticket.data;
 366
 367     /* XXX this one should also be filled in */
 368     cred->authdata = NULL;
 369
 370     cred->addresses = calloc(incred->addresses.len + 1,
 371                              sizeof(cred->addresses[0]));
 372     if (cred->addresses == NULL) {
 373
 374         ret = ENOMEM;
 375         goto fail;
 376     }
 377
 378     for (i = 0; i < incred->addresses.len; i++) {
 379         cc_data *addr;
 380         addr = malloc(sizeof(*addr));
 381         if (addr == NULL) {
 382             ret = ENOMEM;
 383             goto fail;
 384         }
 385         addr->type = incred->addresses.val[i].addr_type;
 386         addr->length = incred->addresses.val[i].address.length;
 387         addr->data = malloc(addr->length);
 388         if (addr->data == NULL) {
 389             free(addr);
 390             ret = ENOMEM;
 391             goto fail;
 392         }
 393         memcpy(addr->data, incred->addresses.val[i].address.data,
 394                addr->length);
 395         cred->addresses[i] = addr;
 396     }
 397     cred->addresses[i] = NULL;
 398
 399     cred->ticket_flags = 0;
 400     if (incred->flags.b.forwardable)
 401         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_FORWARDABLE;
 402     if (incred->flags.b.forwarded)
 403         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_FORWARDED;
 404     if (incred->flags.b.proxiable)
 405         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_PROXIABLE;
 406     if (incred->flags.b.proxy)
 407         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_PROXY;
 408     if (incred->flags.b.may_postdate)
 409         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_MAY_POSTDATE;
 410     if (incred->flags.b.postdated)
 411         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_POSTDATED;
 412     if (incred->flags.b.invalid)
 413         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_INVALID;
 414     if (incred->flags.b.renewable)
 415         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_RENEWABLE;
 416     if (incred->flags.b.initial)
 417         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_INITIAL;
 418     if (incred->flags.b.pre_authent)
 419         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_PRE_AUTH;
 420     if (incred->flags.b.hw_authent)
 421         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_HW_AUTH;
 422     if (incred->flags.b.transited_policy_checked)
 423         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_TRANSIT_POLICY_CHECKED;
 424     if (incred->flags.b.ok_as_delegate)
 425         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_OK_AS_DELEGATE;
 426     if (incred->flags.b.anonymous)
 427         cred->ticket_flags |= KRB5_CCAPI_TKT_FLG_ANONYMOUS;
 428
 429     return 0;
 430
 431 fail:
 432     free_ccred(cred);
 433
 434     krb5_clear_error_message(context);
 435     return ret;
 436 }
 437
 438 static cc_int32
 439 get_cc_name(krb5_acc *a)
 440 {
 441     cc_string_t name;
 442     cc_int32 error;
 443
 444     error = (*a->ccache->func->get_name)(a->ccache, &name);
 445     if (error)
 446         return error;
 447
 448     a->cache_name = strdup(name->data);
 449     (*name->func->release)(name);
 450     if (a->cache_name == NULL)
 451         return ccErrNoMem;
 452     return ccNoError;
 453 }
 454
 455
 456 static const char* KRB5_CALLCONV
 457 acc_get_name(krb5_context context,
 458              krb5_ccache id)
 459 {
 460     krb5_acc *a = ACACHE(id);
 461     int32_t error;
 462
 463     if (a->cache_name == NULL) {
 464         krb5_error_code ret;
 465         krb5_principal principal;
 466         char *name;
 467
 468         ret = _krb5_get_default_principal_local(context, &principal);
 469         if (ret)
 470             return NULL;
 471
 472         ret = krb5_unparse_name(context, principal, &name);
 473         krb5_free_principal(context, principal);
 474         if (ret)
 475             return NULL;
 476
 477         error = (*a->context->func->create_new_ccache)(a->context,
 478                                                        cc_credentials_v5,
 479                                                        name,
 480                                                        &a->ccache);
 481         krb5_xfree(name);
 482         if (error)
 483             return NULL;
 484
 485         error = get_cc_name(a);
 486         if (error)
 487             return NULL;
 488     }
 489
 490     return a->cache_name;
 491 }
 492
 493 static krb5_error_code KRB5_CALLCONV
 494 acc_alloc(krb5_context context, krb5_ccache *id)
 495 {
 496     krb5_error_code ret;
 497     cc_int32 error;
 498     krb5_acc *a;
 499
 500     ret = init_ccapi(context);
 501     if (ret)
 502         return ret;
 503
 504     ret = krb5_data_alloc(&(*id)->data, sizeof(*a));
 505     if (ret) {
 506         krb5_clear_error_message(context);
 507         return ret;
 508     }
 509
 510     a = ACACHE(*id);
 511
 512     error = (*init_func)(&a->context, ccapi_version_3, NULL, NULL);
 513     if (error) {
 514         krb5_data_free(&(*id)->data);
 515         return translate_cc_error(context, error);
 516     }
 517
 518     a->cache_name = NULL;
 519
 520     return 0;
 521 }
 522
 523 static krb5_error_code KRB5_CALLCONV
 524 acc_resolve(krb5_context context, krb5_ccache *id, const char *res)
 525 {
 526     krb5_error_code ret;
 527     cc_int32 error;
 528     krb5_acc *a;
 529
 530     ret = acc_alloc(context, id);
 531     if (ret)
 532         return ret;
 533
 534     a = ACACHE(*id);
 535
 536     error = (*a->context->func->open_ccache)(a->context, res, &a->ccache);
 537     if (error == ccNoError) {
 538         cc_time_t offset;
 539         error = get_cc_name(a);
 540         if (error != ccNoError) {
 541             acc_close(context, *id);
 542             *id = NULL;
 543             return translate_cc_error(context, error);
 544         }
 545
 546         error = (*a->ccache->func->get_kdc_time_offset)(a->ccache,
 547                                                         cc_credentials_v5,
 548                                                         &offset);
 549         if (error == 0)
 550             context->kdc_sec_offset = offset;
 551
 552     } else if (error == ccErrCCacheNotFound) {
 553         a->ccache = NULL;
 554         a->cache_name = NULL;
 555     } else {
 556         *id = NULL;
 557         return translate_cc_error(context, error);
 558     }
 559
 560     return 0;
 561 }
 562
 563 static krb5_error_code KRB5_CALLCONV
 564 acc_gen_new(krb5_context context, krb5_ccache *id)
 565 {
 566     krb5_error_code ret;
 567     krb5_acc *a;
 568
 569     ret = acc_alloc(context, id);
 570     if (ret)
 571         return ret;
 572
 573     a = ACACHE(*id);
 574
 575     a->ccache = NULL;
 576     a->cache_name = NULL;
 577
 578     return 0;
 579 }
 580
 581 static krb5_error_code KRB5_CALLCONV
 582 acc_initialize(krb5_context context,
 583                krb5_ccache id,
 584                krb5_principal primary_principal)
 585 {
 586     krb5_acc *a = ACACHE(id);
 587     krb5_error_code ret;
 588     int32_t error;
 589     char *name;
 590
 591     ret = krb5_unparse_name(context, primary_principal, &name);
 592     if (ret)
 593         return ret;
 594
 595     if (a->cache_name == NULL) {
 596         error = (*a->context->func->create_new_ccache)(a->context,
 597                                                        cc_credentials_v5,
 598                                                        name,
 599                                                        &a->ccache);
 600         free(name);
 601         if (error == ccNoError)
 602             error = get_cc_name(a);
 603     } else {
 604         cc_credentials_iterator_t iter;
 605         cc_credentials_t ccred;
 606
 607         error = (*a->ccache->func->new_credentials_iterator)(a->ccache, &iter);
 608         if (error) {
 609             free(name);
 610             return translate_cc_error(context, error);
 611         }
 612
 613         while (1) {
 614             error = (*iter->func->next)(iter, &ccred);
 615             if (error)
 616                 break;
 617             (*a->ccache->func->remove_credentials)(a->ccache, ccred);
 618             (*ccred->func->release)(ccred);
 619         }
 620         (*iter->func->release)(iter);
 621
 622         error = (*a->ccache->func->set_principal)(a->ccache,
 623                                                   cc_credentials_v5,
 624                                                   name);
 625     }
 626
 627     if (error == 0 && context->kdc_sec_offset)
 628         error = (*a->ccache->func->set_kdc_time_offset)(a->ccache,
 629                                                         cc_credentials_v5,
 630                                                         context->kdc_sec_offset);
 631
 632     return translate_cc_error(context, error);
 633 }
 634
 635 static krb5_error_code KRB5_CALLCONV
 636 acc_close(krb5_context context,
 637           krb5_ccache id)
 638 {
 639     krb5_acc *a = ACACHE(id);
 640
 641     if (a->ccache) {
 642         (*a->ccache->func->release)(a->ccache);
 643         a->ccache = NULL;
 644     }
 645     if (a->cache_name) {
 646         free(a->cache_name);
 647         a->cache_name = NULL;
 648     }
 649     if (a->context) {
 650         (*a->context->func->release)(a->context);
 651         a->context = NULL;
 652     }
 653     krb5_data_free(&id->data);
 654     return 0;
 655 }
 656
 657 static krb5_error_code KRB5_CALLCONV
 658 acc_destroy(krb5_context context,
 659             krb5_ccache id)
 660 {
 661     krb5_acc *a = ACACHE(id);
 662     cc_int32 error = 0;
 663
 664     if (a->ccache) {
 665         error = (*a->ccache->func->destroy)(a->ccache);
 666         a->ccache = NULL;
 667     }
 668     if (a->context) {
 669         error = (a->context->func->release)(a->context);
 670         a->context = NULL;
 671     }
 672     return translate_cc_error(context, error);
 673 }
 674
 675 static krb5_error_code KRB5_CALLCONV
 676 acc_store_cred(krb5_context context,
 677                krb5_ccache id,
 678                krb5_creds *creds)
 679 {
 680     krb5_acc *a = ACACHE(id);
 681     cc_credentials_union cred;
 682     cc_credentials_v5_t v5cred;
 683     krb5_error_code ret;
 684     cc_int32 error;
 685
 686     if (a->ccache == NULL) {
 687         krb5_set_error_message(context, KRB5_CC_NOTFOUND,
 688                                N_("No API credential found", ""));
 689         return KRB5_CC_NOTFOUND;
 690     }
 691
 692     cred.version = cc_credentials_v5;
 693     cred.credentials.credentials_v5 = &v5cred;
 694
 695     ret = make_ccred_from_cred(context,
 696                                creds,
 697                                &v5cred);
 698     if (ret)
 699         return ret;
 700
 701     error = (*a->ccache->func->store_credentials)(a->ccache, &cred);
 702     if (error)
 703         ret = translate_cc_error(context, error);
 704
 705     free_ccred(&v5cred);
 706
 707     return ret;
 708 }
 709
 710 static krb5_error_code KRB5_CALLCONV
 711 acc_get_principal(krb5_context context,
 712                   krb5_ccache id,
 713                   krb5_principal *principal)
 714 {
 715     krb5_acc *a = ACACHE(id);
 716     krb5_error_code ret;
 717     int32_t error;
 718     cc_string_t name;
 719
 720     if (a->ccache == NULL) {
 721         krb5_set_error_message(context, KRB5_CC_NOTFOUND,
 722                                N_("No API credential found", ""));
 723         return KRB5_CC_NOTFOUND;
 724     }
 725
 726     error = (*a->ccache->func->get_principal)(a->ccache,
 727                                               cc_credentials_v5,
 728                                               &name);
 729     if (error)
 730         return translate_cc_error(context, error);
 731
 732     ret = krb5_parse_name(context, name->data, principal);
 733
 734     (*name->func->release)(name);
 735     return ret;
 736 }
 737
 738 static krb5_error_code KRB5_CALLCONV
 739 acc_get_first (krb5_context context,
 740                krb5_ccache id,
 741                krb5_cc_cursor *cursor)
 742 {
 743     cc_credentials_iterator_t iter;
 744     krb5_acc *a = ACACHE(id);
 745     int32_t error;
 746
 747     if (a->ccache == NULL) {
 748         krb5_set_error_message(context, KRB5_CC_NOTFOUND,
 749                                N_("No API credential found", ""));
 750         return KRB5_CC_NOTFOUND;
 751     }
 752
 753     error = (*a->ccache->func->new_credentials_iterator)(a->ccache, &iter);
 754     if (error) {
 755         krb5_clear_error_message(context);
 756         return ENOENT;
 757     }
 758     *cursor = iter;
 759     return 0;
 760 }
 761
 762
 763 static krb5_error_code KRB5_CALLCONV
 764 acc_get_next (krb5_context context,
 765               krb5_ccache id,
 766               krb5_cc_cursor *cursor,
 767               krb5_creds *creds)
 768 {
 769     cc_credentials_iterator_t iter = *cursor;
 770     cc_credentials_t cred;
 771     krb5_error_code ret;
 772     int32_t error;
 773
 774     while (1) {
 775         error = (*iter->func->next)(iter, &cred);
 776         if (error)
 777             return translate_cc_error(context, error);
 778         if (cred->data->version == cc_credentials_v5)
 779             break;
 780         (*cred->func->release)(cred);
 781     }
 782
 783     ret = make_cred_from_ccred(context,
 784                                cred->data->credentials.credentials_v5,
 785                                creds);
 786     (*cred->func->release)(cred);
 787     return ret;
 788 }
 789
 790 static krb5_error_code KRB5_CALLCONV
 791 acc_end_get (krb5_context context,
 792              krb5_ccache id,
 793              krb5_cc_cursor *cursor)
 794 {
 795     cc_credentials_iterator_t iter = *cursor;
 796     (*iter->func->release)(iter);
 797     return 0;
 798 }
 799
 800 static krb5_error_code KRB5_CALLCONV
 801 acc_remove_cred(krb5_context context,
 802                 krb5_ccache id,
 803                 krb5_flags which,
 804                 krb5_creds *cred)
 805 {
 806     cc_credentials_iterator_t iter;
 807     krb5_acc *a = ACACHE(id);
 808     cc_credentials_t ccred;
 809     krb5_error_code ret;
 810     cc_int32 error;
 811     char *client, *server;
 812
 813     if (a->ccache == NULL) {
 814         krb5_set_error_message(context, KRB5_CC_NOTFOUND,
 815                                N_("No API credential found", ""));
 816         return KRB5_CC_NOTFOUND;
 817     }
 818
 819     if (cred->client) {
 820         ret = krb5_unparse_name(context, cred->client, &client);
 821         if (ret)
 822             return ret;
 823     } else
 824         client = NULL;
 825
 826     ret = krb5_unparse_name(context, cred->server, &server);
 827     if (ret) {
 828         free(client);
 829         return ret;
 830     }
 831
 832     error = (*a->ccache->func->new_credentials_iterator)(a->ccache, &iter);
 833     if (error) {
 834         free(server);
 835         free(client);
 836         return translate_cc_error(context, error);
 837     }
 838
 839     ret = KRB5_CC_NOTFOUND;
 840     while (1) {
 841         cc_credentials_v5_t *v5cred;
 842
 843         error = (*iter->func->next)(iter, &ccred);
 844         if (error)
 845             break;
 846
 847         if (ccred->data->version != cc_credentials_v5)
 848             goto next;
 849
 850         v5cred = ccred->data->credentials.credentials_v5;
 851
 852         if (client && strcmp(v5cred->client, client) != 0)
 853             goto next;
 854
 855         if (strcmp(v5cred->server, server) != 0)
 856             goto next;
 857
 858         (*a->ccache->func->remove_credentials)(a->ccache, ccred);
 859         ret = 0;
 860     next:
 861         (*ccred->func->release)(ccred);
 862     }
 863
 864     (*iter->func->release)(iter);
 865
 866     if (ret)
 867         krb5_set_error_message(context, ret,
 868                                N_("Can't find credential %s in cache",
 869                                  "principal"), server);
 870     free(server);
 871     free(client);
 872
 873     return ret;
 874 }
 875
 876 static krb5_error_code KRB5_CALLCONV
 877 acc_set_flags(krb5_context context,
 878               krb5_ccache id,
 879               krb5_flags flags)
 880 {
 881     return 0;
 882 }
 883
 884 static int KRB5_CALLCONV
 885 acc_get_version(krb5_context context,
 886                 krb5_ccache id)
 887 {
 888     return 0;
 889 }
 890
 891 struct cache_iter {
 892     cc_context_t context;
 893     cc_ccache_iterator_t iter;
 894 };
 895
 896 static krb5_error_code KRB5_CALLCONV
 897 acc_get_cache_first(krb5_context context, krb5_cc_cursor *cursor)
 898 {
 899     struct cache_iter *iter;
 900     krb5_error_code ret;
 901     cc_int32 error;
 902
 903     ret = init_ccapi(context);
 904     if (ret)
 905         return ret;
 906
 907     iter = calloc(1, sizeof(*iter));
 908     if (iter == NULL) {
 909         krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
 910         return ENOMEM;
 911     }
 912
 913     error = (*init_func)(&iter->context, ccapi_version_3, NULL, NULL);
 914     if (error) {
 915         free(iter);
 916         return translate_cc_error(context, error);
 917     }
 918
 919     error = (*iter->context->func->new_ccache_iterator)(iter->context,
 920                                                         &iter->iter);
 921     if (error) {
 922         free(iter);
 923         krb5_clear_error_message(context);
 924         return ENOENT;
 925     }
 926     *cursor = iter;
 927     return 0;
 928 }
 929
 930 static krb5_error_code KRB5_CALLCONV
 931 acc_get_cache_next(krb5_context context, krb5_cc_cursor cursor, krb5_ccache *id)
 932 {
 933     struct cache_iter *iter = cursor;
 934     cc_ccache_t cache;
 935     krb5_acc *a;
 936     krb5_error_code ret;
 937     int32_t error;
 938
 939     error = (*iter->iter->func->next)(iter->iter, &cache);
 940     if (error)
 941         return translate_cc_error(context, error);
 942
 943     ret = _krb5_cc_allocate(context, &krb5_acc_ops, id);
 944     if (ret) {
 945         (*cache->func->release)(cache);
 946         return ret;
 947     }
 948
 949     ret = acc_alloc(context, id);
 950     if (ret) {
 951         (*cache->func->release)(cache);
 952         free(*id);
 953         return ret;
 954     }
 955
 956     a = ACACHE(*id);
 957     a->ccache = cache;
 958
 959     error = get_cc_name(a);
 960     if (error) {
 961         acc_close(context, *id);
 962         *id = NULL;
 963         return translate_cc_error(context, error);
 964     }
 965     return 0;
 966 }
 967
 968 static krb5_error_code KRB5_CALLCONV
 969 acc_end_cache_get(krb5_context context, krb5_cc_cursor cursor)
 970 {
 971     struct cache_iter *iter = cursor;
 972
 973     (*iter->iter->func->release)(iter->iter);
 974     iter->iter = NULL;
 975     (*iter->context->func->release)(iter->context);
 976     iter->context = NULL;
 977     free(iter);
 978     return 0;
 979 }
 980
 981 static krb5_error_code KRB5_CALLCONV
 982 acc_move(krb5_context context, krb5_ccache from, krb5_ccache to)
 983 {
 984     krb5_acc *afrom = ACACHE(from);
 985     krb5_acc *ato = ACACHE(to);
 986     int32_t error;
 987
 988     if (ato->ccache == NULL) {
 989         cc_string_t name;
 990
 991         error = (*afrom->ccache->func->get_principal)(afrom->ccache,
 992                                                       cc_credentials_v5,
 993                                                       &name);
 994         if (error)
 995             return translate_cc_error(context, error);
 996
 997         error = (*ato->context->func->create_new_ccache)(ato->context,
 998                                                          cc_credentials_v5,
 999                                                          name->data,
1000                                                          &ato->ccache);
1001         (*name->func->release)(name);
1002         if (error)
1003             return translate_cc_error(context, error);
1004     }
1005
1006     error = (*ato->ccache->func->move)(afrom->ccache, ato->ccache);
1007
1008     acc_destroy(context, from);
1009
1010     return translate_cc_error(context, error);
1011 }
1012
1013 static krb5_error_code KRB5_CALLCONV
1014 acc_get_default_name(krb5_context context, char **str)
1015 {
1016     krb5_error_code ret;
1017     cc_context_t cc;
1018     cc_string_t name;
1019     int32_t error;
1020
1021     ret = init_ccapi(context);
1022     if (ret)
1023         return ret;
1024
1025     error = (*init_func)(&cc, ccapi_version_3, NULL, NULL);
1026     if (error)
1027         return translate_cc_error(context, error);
1028
1029     error = (*cc->func->get_default_ccache_name)(cc, &name);
1030     if (error) {
1031         (*cc->func->release)(cc);
1032         return translate_cc_error(context, error);
1033     }
1034
1035     error = asprintf(str, "API:%s", name->data);
1036     (*name->func->release)(name);
1037     (*cc->func->release)(cc);
1038
1039     if (error < 0 || *str == NULL) {
1040         krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
1041         return ENOMEM;
1042     }
1043     return 0;
1044 }
1045
1046 static krb5_error_code KRB5_CALLCONV
1047 acc_set_default(krb5_context context, krb5_ccache id)
1048 {
1049     krb5_acc *a = ACACHE(id);
1050     cc_int32 error;
1051
1052     if (a->ccache == NULL) {
1053         krb5_set_error_message(context, KRB5_CC_NOTFOUND,
1054                                N_("No API credential found", ""));
1055         return KRB5_CC_NOTFOUND;
1056     }
1057
1058     error = (*a->ccache->func->set_default)(a->ccache);
1059     if (error)
1060         return translate_cc_error(context, error);
1061
1062     return 0;
1063 }
1064
1065 static krb5_error_code KRB5_CALLCONV
1066 acc_lastchange(krb5_context context, krb5_ccache id, krb5_timestamp *mtime)
1067 {
1068     krb5_acc *a = ACACHE(id);
1069     cc_int32 error;
1070     cc_time_t t;
1071
1072     if (a->ccache == NULL) {
1073         krb5_set_error_message(context, KRB5_CC_NOTFOUND,
1074                                N_("No API credential found", ""));
1075         return KRB5_CC_NOTFOUND;
1076     }
1077
1078     error = (*a->ccache->func->get_change_time)(a->ccache, &t);
1079     if (error)
1080         return translate_cc_error(context, error);
1081
1082     *mtime = t;
1083
1084     return 0;
1085 }
1086
1087 /**
1088  * Variable containing the API based credential cache implemention.
1089  *
1090  * @ingroup krb5_ccache
1091  */
1092
1093 KRB5_LIB_VARIABLE const krb5_cc_ops krb5_acc_ops = {
1094     KRB5_CC_OPS_VERSION,
1095     "API",
1096     acc_get_name,
1097     acc_resolve,
1098     acc_gen_new,
1099     acc_initialize,
1100     acc_destroy,
1101     acc_close,
1102     acc_store_cred,
1103     NULL, /* acc_retrieve */
1104     acc_get_principal,
1105     acc_get_first,
1106     acc_get_next,
1107     acc_end_get,
1108     acc_remove_cred,
1109     acc_set_flags,
1110     acc_get_version,
1111     acc_get_cache_first,
1112     acc_get_cache_next,
1113     acc_end_cache_get,
1114     acc_move,
1115     acc_get_default_name,
1116     acc_set_default,
1117     acc_lastchange
1118 };
1119
1120 #endif