lib/kadm5/log.c

   1 /*
   2  * Copyright (c) 1997 - 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 "kadm5_locl.h"
  35 #include "heim_threads.h"
  36
  37 RCSID("$Id$");
  38
  39 /*
  40  * A log record consists of:
  41  *
  42  * version number               4 bytes
  43  * time in seconds              4 bytes
  44  * operation (enum kadm_ops)    4 bytes
  45  * length of record             4 bytes
  46  * data...                      n bytes
  47  * length of record             4 bytes
  48  * version number               4 bytes
  49  *
  50  */
  51
  52 kadm5_ret_t
  53 kadm5_log_get_version_fd (int fd,
  54                           uint32_t *ver)
  55 {
  56     int ret;
  57     krb5_storage *sp;
  58     int32_t old_version;
  59
  60     ret = lseek (fd, 0, SEEK_END);
  61     if(ret < 0)
  62         return errno;
  63     if(ret == 0) {
  64         *ver = 0;
  65         return 0;
  66     }
  67     sp = krb5_storage_from_fd (fd);
  68     krb5_storage_seek(sp, -4, SEEK_CUR);
  69     krb5_ret_int32 (sp, &old_version);
  70     *ver = old_version;
  71     krb5_storage_free(sp);
  72     lseek (fd, 0, SEEK_END);
  73     return 0;
  74 }
  75
  76 kadm5_ret_t
  77 kadm5_log_get_version (kadm5_server_context *context, uint32_t *ver)
  78 {
  79     return kadm5_log_get_version_fd (context->log_context.log_fd, ver);
  80 }
  81
  82 kadm5_ret_t
  83 kadm5_log_set_version (kadm5_server_context *context, uint32_t vno)
  84 {
  85     kadm5_log_context *log_context = &context->log_context;
  86
  87     log_context->version = vno;
  88     return 0;
  89 }
  90
  91 kadm5_ret_t
  92 kadm5_log_init (kadm5_server_context *context)
  93 {
  94     int fd;
  95     kadm5_ret_t ret;
  96     kadm5_log_context *log_context = &context->log_context;
  97
  98     if (log_context->log_fd != -1)
  99         return 0;
 100     fd = open (log_context->log_file, O_RDWR | O_CREAT, 0600);
 101     if (fd < 0) {
 102         ret = errno;
 103         krb5_set_error_message(context->context, ret, "kadm5_log_init: open %s",
 104                               log_context->log_file);
 105         return ret;
 106     }
 107     if (flock (fd, LOCK_EX) < 0) {
 108         ret = errno;
 109         krb5_set_error_message(context->context, ret, "kadm5_log_init: flock %s",
 110                                log_context->log_file);
 111         close (fd);
 112         return errno;
 113     }
 114
 115     ret = kadm5_log_get_version_fd (fd, &log_context->version);
 116     if (ret)
 117         return ret;
 118
 119     log_context->log_fd  = fd;
 120     return 0;
 121 }
 122
 123 kadm5_ret_t
 124 kadm5_log_reinit (kadm5_server_context *context)
 125 {
 126     int fd;
 127     kadm5_log_context *log_context = &context->log_context;
 128
 129     if (log_context->log_fd != -1) {
 130         flock (log_context->log_fd, LOCK_UN);
 131         close (log_context->log_fd);
 132         log_context->log_fd = -1;
 133     }
 134     fd = open (log_context->log_file, O_RDWR | O_CREAT | O_TRUNC, 0600);
 135     if (fd < 0)
 136         return errno;
 137     if (flock (fd, LOCK_EX) < 0) {
 138         close (fd);
 139         return errno;
 140     }
 141
 142     log_context->version = 0;
 143     log_context->log_fd  = fd;
 144     return 0;
 145 }
 146
 147
 148 kadm5_ret_t
 149 kadm5_log_end (kadm5_server_context *context)
 150 {
 151     kadm5_log_context *log_context = &context->log_context;
 152     int fd = log_context->log_fd;
 153
 154     flock (fd, LOCK_UN);
 155     close(fd);
 156     log_context->log_fd = -1;
 157     return 0;
 158 }
 159
 160 static kadm5_ret_t
 161 kadm5_log_preamble (kadm5_server_context *context,
 162                     krb5_storage *sp,
 163                     enum kadm_ops op)
 164 {
 165     kadm5_log_context *log_context = &context->log_context;
 166     kadm5_ret_t kadm_ret;
 167
 168     kadm_ret = kadm5_log_init (context);
 169     if (kadm_ret)
 170         return kadm_ret;
 171
 172     krb5_store_int32 (sp, ++log_context->version);
 173     krb5_store_int32 (sp, time(NULL));
 174     krb5_store_int32 (sp, op);
 175     return 0;
 176 }
 177
 178 static kadm5_ret_t
 179 kadm5_log_postamble (kadm5_log_context *context,
 180                      krb5_storage *sp)
 181 {
 182     krb5_store_int32 (sp, context->version);
 183     return 0;
 184 }
 185
 186 /*
 187  * flush the log record in `sp'.
 188  */
 189
 190 static kadm5_ret_t
 191 kadm5_log_flush (kadm5_log_context *log_context,
 192                  krb5_storage *sp)
 193 {
 194     krb5_data data;
 195     size_t len;
 196     ssize_t ret;
 197
 198     krb5_storage_to_data(sp, &data);
 199     len = data.length;
 200     ret = write (log_context->log_fd, data.data, len);
 201     if (ret < 0 || (size_t)ret != len) {
 202         krb5_data_free(&data);
 203         return errno;
 204     }
 205     if (fsync (log_context->log_fd) < 0) {
 206         krb5_data_free(&data);
 207         return errno;
 208     }
 209
 210     /*
 211      * Try to send a signal to any running `ipropd-master'
 212      */
 213 #ifndef NO_UNIX_SOCKETS
 214     sendto (log_context->socket_fd,
 215             (void *)&log_context->version,
 216             sizeof(log_context->version),
 217             0,
 218             (struct sockaddr *)&log_context->socket_name,
 219             sizeof(log_context->socket_name));
 220 #else
 221     sendto (log_context->socket_fd,
 222             (void *)&log_context->version,
 223             sizeof(log_context->version),
 224             0,
 225             log_context->socket_info->ai_addr,
 226             log_context->socket_info->ai_addrlen);
 227 #endif
 228
 229     krb5_data_free(&data);
 230     return 0;
 231 }
 232
 233 /*
 234  * Add a `create' operation to the log.
 235  */
 236
 237 kadm5_ret_t
 238 kadm5_log_create (kadm5_server_context *context,
 239                   hdb_entry *ent)
 240 {
 241     krb5_storage *sp;
 242     kadm5_ret_t ret;
 243     krb5_data value;
 244     kadm5_log_context *log_context = &context->log_context;
 245
 246     sp = krb5_storage_emem();
 247     ret = hdb_entry2value (context->context, ent, &value);
 248     if (ret) {
 249         krb5_storage_free(sp);
 250         return ret;
 251     }
 252     ret = kadm5_log_preamble (context, sp, kadm_create);
 253     if (ret) {
 254         krb5_data_free (&value);
 255         krb5_storage_free(sp);
 256         return ret;
 257     }
 258     krb5_store_int32 (sp, value.length);
 259     krb5_storage_write(sp, value.data, value.length);
 260     krb5_store_int32 (sp, value.length);
 261     krb5_data_free (&value);
 262     ret = kadm5_log_postamble (log_context, sp);
 263     if (ret) {
 264         krb5_storage_free (sp);
 265         return ret;
 266     }
 267     ret = kadm5_log_flush (log_context, sp);
 268     krb5_storage_free (sp);
 269     if (ret)
 270         return ret;
 271     ret = kadm5_log_end (context);
 272     return ret;
 273 }
 274
 275 /*
 276  * Read the data of a create log record from `sp' and change the
 277  * database.
 278  */
 279
 280 static kadm5_ret_t
 281 kadm5_log_replay_create (kadm5_server_context *context,
 282                          uint32_t ver,
 283                          uint32_t len,
 284                          krb5_storage *sp)
 285 {
 286     krb5_error_code ret;
 287     krb5_data data;
 288     hdb_entry_ex ent;
 289
 290     memset(&ent, 0, sizeof(ent));
 291
 292     ret = krb5_data_alloc (&data, len);
 293     if (ret) {
 294         krb5_set_error_message(context->context, ret, "out of memory");
 295         return ret;
 296     }
 297     krb5_storage_read (sp, data.data, len);
 298     ret = hdb_value2entry (context->context, &data, &ent.entry);
 299     krb5_data_free(&data);
 300     if (ret) {
 301         krb5_set_error_message(context->context, ret,
 302                                "Unmarshaling hdb entry failed");
 303         return ret;
 304     }
 305     ret = context->db->hdb_store(context->context, context->db, 0, &ent);
 306     hdb_free_entry (context->context, &ent);
 307     return ret;
 308 }
 309
 310 /*
 311  * Add a `delete' operation to the log.
 312  */
 313
 314 kadm5_ret_t
 315 kadm5_log_delete (kadm5_server_context *context,
 316                   krb5_principal princ)
 317 {
 318     krb5_storage *sp;
 319     kadm5_ret_t ret;
 320     off_t off;
 321     off_t len;
 322     kadm5_log_context *log_context = &context->log_context;
 323
 324     sp = krb5_storage_emem();
 325     if (sp == NULL)
 326         return ENOMEM;
 327     ret = kadm5_log_preamble (context, sp, kadm_delete);
 328     if (ret)
 329         goto out;
 330     ret = krb5_store_int32 (sp, 0);
 331     if (ret)
 332         goto out;
 333     off = krb5_storage_seek (sp, 0, SEEK_CUR);
 334     ret = krb5_store_principal (sp, princ);
 335     if (ret)
 336         goto out;
 337     len = krb5_storage_seek (sp, 0, SEEK_CUR) - off;
 338     krb5_storage_seek(sp, -(len + 4), SEEK_CUR);
 339     ret = krb5_store_int32 (sp, len);
 340     if (ret)
 341         goto out;
 342     krb5_storage_seek(sp, len, SEEK_CUR);
 343     ret = krb5_store_int32 (sp, len);
 344     if (ret)
 345         goto out;
 346     ret = kadm5_log_postamble (log_context, sp);
 347     if (ret)
 348         goto out;
 349     ret = kadm5_log_flush (log_context, sp);
 350     if (ret)
 351         goto out;
 352     ret = kadm5_log_end (context);
 353 out:
 354     krb5_storage_free (sp);
 355     return ret;
 356 }
 357
 358 /*
 359  * Read a `delete' log operation from `sp' and apply it.
 360  */
 361
 362 static kadm5_ret_t
 363 kadm5_log_replay_delete (kadm5_server_context *context,
 364                          uint32_t ver,
 365                          uint32_t len,
 366                          krb5_storage *sp)
 367 {
 368     krb5_error_code ret;
 369     krb5_principal principal;
 370
 371     ret = krb5_ret_principal (sp, &principal);
 372     if (ret) {
 373         krb5_set_error_message(context->context,  ret, "Failed to read deleted "
 374                                "principal from log version: %ld",  (long)ver);
 375         return ret;
 376     }
 377
 378     ret = context->db->hdb_remove(context->context, context->db, principal);
 379     krb5_free_principal (context->context, principal);
 380     return ret;
 381 }
 382
 383 /*
 384  * Add a `rename' operation to the log.
 385  */
 386
 387 kadm5_ret_t
 388 kadm5_log_rename (kadm5_server_context *context,
 389                   krb5_principal source,
 390                   hdb_entry *ent)
 391 {
 392     krb5_storage *sp;
 393     kadm5_ret_t ret;
 394     off_t off;
 395     off_t len;
 396     krb5_data value;
 397     kadm5_log_context *log_context = &context->log_context;
 398
 399     krb5_data_zero(&value);
 400
 401     sp = krb5_storage_emem();
 402     ret = hdb_entry2value (context->context, ent, &value);
 403     if (ret)
 404         goto failed;
 405
 406     ret = kadm5_log_preamble (context, sp, kadm_rename);
 407     if (ret)
 408         goto failed;
 409
 410     ret = krb5_store_int32 (sp, 0);
 411     if (ret)
 412         goto failed;
 413     off = krb5_storage_seek (sp, 0, SEEK_CUR);
 414     ret = krb5_store_principal (sp, source);
 415     if (ret)
 416         goto failed;
 417
 418     krb5_storage_write(sp, value.data, value.length);
 419     len = krb5_storage_seek (sp, 0, SEEK_CUR) - off;
 420
 421     krb5_storage_seek(sp, -(len + 4), SEEK_CUR);
 422     ret = krb5_store_int32 (sp, len);
 423     if (ret)
 424         goto failed;
 425
 426     krb5_storage_seek(sp, len, SEEK_CUR);
 427     ret = krb5_store_int32 (sp, len);
 428     if (ret)
 429         goto failed;
 430
 431     ret = kadm5_log_postamble (log_context, sp);
 432     if (ret)
 433         goto failed;
 434
 435     ret = kadm5_log_flush (log_context, sp);
 436     if (ret)
 437         goto failed;
 438     krb5_storage_free (sp);
 439     krb5_data_free (&value);
 440
 441     return kadm5_log_end (context);
 442
 443 failed:
 444     krb5_data_free(&value);
 445     krb5_storage_free(sp);
 446     return ret;
 447 }
 448
 449 /*
 450  * Read a `rename' log operation from `sp' and apply it.
 451  */
 452
 453 static kadm5_ret_t
 454 kadm5_log_replay_rename (kadm5_server_context *context,
 455                          uint32_t ver,
 456                          uint32_t len,
 457                          krb5_storage *sp)
 458 {
 459     krb5_error_code ret;
 460     krb5_principal source;
 461     hdb_entry_ex target_ent;
 462     krb5_data value;
 463     off_t off;
 464     size_t princ_len, data_len;
 465
 466     memset(&target_ent, 0, sizeof(target_ent));
 467
 468     off = krb5_storage_seek(sp, 0, SEEK_CUR);
 469     ret = krb5_ret_principal (sp, &source);
 470     if (ret) {
 471         krb5_set_error_message(context->context, ret, "Failed to read renamed "
 472                                "principal in log, version: %ld", (long)ver);
 473         return ret;
 474     }
 475     princ_len = krb5_storage_seek(sp, 0, SEEK_CUR) - off;
 476     data_len = len - princ_len;
 477     ret = krb5_data_alloc (&value, data_len);
 478     if (ret) {
 479         krb5_free_principal (context->context, source);
 480         return ret;
 481     }
 482     krb5_storage_read (sp, value.data, data_len);
 483     ret = hdb_value2entry (context->context, &value, &target_ent.entry);
 484     krb5_data_free(&value);
 485     if (ret) {
 486         krb5_free_principal (context->context, source);
 487         return ret;
 488     }
 489     ret = context->db->hdb_store (context->context, context->db,
 490                                   0, &target_ent);
 491     hdb_free_entry (context->context, &target_ent);
 492     if (ret) {
 493         krb5_free_principal (context->context, source);
 494         return ret;
 495     }
 496     ret = context->db->hdb_remove (context->context, context->db, source);
 497     krb5_free_principal (context->context, source);
 498     return ret;
 499 }
 500
 501
 502 /*
 503  * Add a `modify' operation to the log.
 504  */
 505
 506 kadm5_ret_t
 507 kadm5_log_modify (kadm5_server_context *context,
 508                   hdb_entry *ent,
 509                   uint32_t mask)
 510 {
 511     krb5_storage *sp;
 512     kadm5_ret_t ret;
 513     krb5_data value;
 514     uint32_t len;
 515     kadm5_log_context *log_context = &context->log_context;
 516
 517     krb5_data_zero(&value);
 518
 519     sp = krb5_storage_emem();
 520     ret = hdb_entry2value (context->context, ent, &value);
 521     if (ret)
 522         goto failed;
 523
 524     ret = kadm5_log_preamble (context, sp, kadm_modify);
 525     if (ret)
 526         goto failed;
 527
 528     len = value.length + 4;
 529     ret = krb5_store_int32 (sp, len);
 530     if (ret)
 531         goto failed;
 532     ret = krb5_store_int32 (sp, mask);
 533     if (ret)
 534         goto failed;
 535     krb5_storage_write (sp, value.data, value.length);
 536
 537     ret = krb5_store_int32 (sp, len);
 538     if (ret)
 539         goto failed;
 540     ret = kadm5_log_postamble (log_context, sp);
 541     if (ret)
 542         goto failed;
 543     ret = kadm5_log_flush (log_context, sp);
 544     if (ret)
 545         goto failed;
 546     krb5_data_free(&value);
 547     krb5_storage_free (sp);
 548     return kadm5_log_end (context);
 549 failed:
 550     krb5_data_free(&value);
 551     krb5_storage_free(sp);
 552     return ret;
 553 }
 554
 555 /*
 556  * Read a `modify' log operation from `sp' and apply it.
 557  */
 558
 559 static kadm5_ret_t
 560 kadm5_log_replay_modify (kadm5_server_context *context,
 561                          uint32_t ver,
 562                          uint32_t len,
 563                          krb5_storage *sp)
 564 {
 565     krb5_error_code ret;
 566     int32_t mask;
 567     krb5_data value;
 568     hdb_entry_ex ent, log_ent;
 569
 570     memset(&log_ent, 0, sizeof(log_ent));
 571
 572     krb5_ret_int32 (sp, &mask);
 573     len -= 4;
 574     ret = krb5_data_alloc (&value, len);
 575     if (ret) {
 576         krb5_set_error_message(context->context, ret, "out of memory");
 577         return ret;
 578     }
 579     krb5_storage_read (sp, value.data, len);
 580     ret = hdb_value2entry (context->context, &value, &log_ent.entry);
 581     krb5_data_free(&value);
 582     if (ret)
 583         return ret;
 584
 585     memset(&ent, 0, sizeof(ent));
 586     ret = context->db->hdb_fetch_kvno(context->context, context->db,
 587                                       log_ent.entry.principal,
 588                                       HDB_F_DECRYPT|HDB_F_GET_ANY|HDB_F_ADMIN_DATA, 0, &ent);
 589     if (ret)
 590         goto out;
 591     if (mask & KADM5_PRINC_EXPIRE_TIME) {
 592         if (log_ent.entry.valid_end == NULL) {
 593             ent.entry.valid_end = NULL;
 594         } else {
 595             if (ent.entry.valid_end == NULL) {
 596                 ent.entry.valid_end = malloc(sizeof(*ent.entry.valid_end));
 597                 if (ent.entry.valid_end == NULL) {
 598                     ret = ENOMEM;
 599                     krb5_set_error_message(context->context, ret, "out of memory");
 600                     goto out;
 601                 }
 602             }
 603             *ent.entry.valid_end = *log_ent.entry.valid_end;
 604         }
 605     }
 606     if (mask & KADM5_PW_EXPIRATION) {
 607         if (log_ent.entry.pw_end == NULL) {
 608             ent.entry.pw_end = NULL;
 609         } else {
 610             if (ent.entry.pw_end == NULL) {
 611                 ent.entry.pw_end = malloc(sizeof(*ent.entry.pw_end));
 612                 if (ent.entry.pw_end == NULL) {
 613                     ret = ENOMEM;
 614                     krb5_set_error_message(context->context, ret, "out of memory");
 615                     goto out;
 616                 }
 617             }
 618             *ent.entry.pw_end = *log_ent.entry.pw_end;
 619         }
 620     }
 621     if (mask & KADM5_LAST_PWD_CHANGE) {
 622         krb5_warnx (context->context, "Unimplemented mask KADM5_LAST_PWD_CHANGE");
 623     }
 624     if (mask & KADM5_ATTRIBUTES) {
 625         ent.entry.flags = log_ent.entry.flags;
 626     }
 627     if (mask & KADM5_MAX_LIFE) {
 628         if (log_ent.entry.max_life == NULL) {
 629             ent.entry.max_life = NULL;
 630         } else {
 631             if (ent.entry.max_life == NULL) {
 632                 ent.entry.max_life = malloc (sizeof(*ent.entry.max_life));
 633                 if (ent.entry.max_life == NULL) {
 634                     ret = ENOMEM;
 635                     krb5_set_error_message(context->context, ret, "out of memory");
 636                     goto out;
 637                 }
 638             }
 639             *ent.entry.max_life = *log_ent.entry.max_life;
 640         }
 641     }
 642     if ((mask & KADM5_MOD_TIME) && (mask & KADM5_MOD_NAME)) {
 643         if (ent.entry.modified_by == NULL) {
 644             ent.entry.modified_by = malloc(sizeof(*ent.entry.modified_by));
 645             if (ent.entry.modified_by == NULL) {
 646                 ret = ENOMEM;
 647                 krb5_set_error_message(context->context, ret, "out of memory");
 648                 goto out;
 649             }
 650         } else
 651             free_Event(ent.entry.modified_by);
 652         ret = copy_Event(log_ent.entry.modified_by, ent.entry.modified_by);
 653         if (ret) {
 654             krb5_set_error_message(context->context, ret, "out of memory");
 655             goto out;
 656         }
 657     }
 658     if (mask & KADM5_KVNO) {
 659         ent.entry.kvno = log_ent.entry.kvno;
 660     }
 661     if (mask & KADM5_MKVNO) {
 662         krb5_warnx (context->context, "Unimplemented mask KADM5_KVNO");
 663     }
 664     if (mask & KADM5_AUX_ATTRIBUTES) {
 665         krb5_warnx (context->context, "Unimplemented mask KADM5_AUX_ATTRIBUTES");
 666     }
 667     if (mask & KADM5_POLICY) {
 668         krb5_warnx (context->context, "Unimplemented mask KADM5_POLICY");
 669     }
 670     if (mask & KADM5_POLICY_CLR) {
 671         krb5_warnx (context->context, "Unimplemented mask KADM5_POLICY_CLR");
 672     }
 673     if (mask & KADM5_MAX_RLIFE) {
 674         if (log_ent.entry.max_renew == NULL) {
 675             ent.entry.max_renew = NULL;
 676         } else {
 677             if (ent.entry.max_renew == NULL) {
 678                 ent.entry.max_renew = malloc (sizeof(*ent.entry.max_renew));
 679                 if (ent.entry.max_renew == NULL) {
 680                     ret = ENOMEM;
 681                     krb5_set_error_message(context->context, ret, "out of memory");
 682                     goto out;
 683                 }
 684             }
 685             *ent.entry.max_renew = *log_ent.entry.max_renew;
 686         }
 687     }
 688     if (mask & KADM5_LAST_SUCCESS) {
 689         krb5_warnx (context->context, "Unimplemented mask KADM5_LAST_SUCCESS");
 690     }
 691     if (mask & KADM5_LAST_FAILED) {
 692         krb5_warnx (context->context, "Unimplemented mask KADM5_LAST_FAILED");
 693     }
 694     if (mask & KADM5_FAIL_AUTH_COUNT) {
 695         krb5_warnx (context->context, "Unimplemented mask KADM5_FAIL_AUTH_COUNT");
 696     }
 697     if (mask & KADM5_KEY_DATA) {
 698         size_t num;
 699         size_t i;
 700
 701         for (i = 0; i < ent.entry.keys.len; ++i)
 702             free_Key(&ent.entry.keys.val[i]);
 703         free (ent.entry.keys.val);
 704
 705         num = log_ent.entry.keys.len;
 706
 707         ent.entry.keys.len = num;
 708         ent.entry.keys.val = malloc(len * sizeof(*ent.entry.keys.val));
 709         if (ent.entry.keys.val == NULL) {
 710             krb5_set_error_message(context->context, ENOMEM, "out of memory");
 711             return ENOMEM;
 712         }
 713         for (i = 0; i < ent.entry.keys.len; ++i) {
 714             ret = copy_Key(&log_ent.entry.keys.val[i],
 715                            &ent.entry.keys.val[i]);
 716             if (ret) {
 717                 krb5_set_error_message(context->context, ret, "out of memory");
 718                 goto out;
 719             }
 720         }
 721     }
 722     if ((mask & KADM5_TL_DATA) && log_ent.entry.extensions) {
 723         HDB_extensions *es = ent.entry.extensions;
 724
 725         ent.entry.extensions = calloc(1, sizeof(*ent.entry.extensions));
 726         if (ent.entry.extensions == NULL)
 727             goto out;
 728
 729         ret = copy_HDB_extensions(log_ent.entry.extensions,
 730                                   ent.entry.extensions);
 731         if (ret) {
 732             krb5_set_error_message(context->context, ret, "out of memory");
 733             free(ent.entry.extensions);
 734             ent.entry.extensions = es;
 735             goto out;
 736         }
 737         if (es) {
 738             free_HDB_extensions(es);
 739             free(es);
 740         }
 741     }
 742     ret = context->db->hdb_store(context->context, context->db,
 743                                  HDB_F_REPLACE, &ent);
 744  out:
 745     hdb_free_entry (context->context, &ent);
 746     hdb_free_entry (context->context, &log_ent);
 747     return ret;
 748 }
 749
 750 /*
 751  * Add a `nop' operation to the log. Does not close the log.
 752  */
 753
 754 kadm5_ret_t
 755 kadm5_log_nop (kadm5_server_context *context)
 756 {
 757     krb5_storage *sp;
 758     kadm5_ret_t ret;
 759     kadm5_log_context *log_context = &context->log_context;
 760
 761     sp = krb5_storage_emem();
 762     ret = kadm5_log_preamble (context, sp, kadm_nop);
 763     if (ret) {
 764         krb5_storage_free (sp);
 765         return ret;
 766     }
 767     krb5_store_int32 (sp, 0);
 768     krb5_store_int32 (sp, 0);
 769     ret = kadm5_log_postamble (log_context, sp);
 770     if (ret) {
 771         krb5_storage_free (sp);
 772         return ret;
 773     }
 774     ret = kadm5_log_flush (log_context, sp);
 775     krb5_storage_free (sp);
 776
 777     return ret;
 778 }
 779
 780 /*
 781  * Read a `nop' log operation from `sp' and apply it.
 782  */
 783
 784 static kadm5_ret_t
 785 kadm5_log_replay_nop (kadm5_server_context *context,
 786                       uint32_t ver,
 787                       uint32_t len,
 788                       krb5_storage *sp)
 789 {
 790     return 0;
 791 }
 792
 793 /*
 794  * Call `func' for each log record in the log in `context'
 795  */
 796
 797 kadm5_ret_t
 798 kadm5_log_foreach (kadm5_server_context *context,
 799                    void (*func)(kadm5_server_context *server_context,
 800                                 uint32_t ver,
 801                                 time_t timestamp,
 802                                 enum kadm_ops op,
 803                                 uint32_t len,
 804                                 krb5_storage *,
 805                                 void *),
 806                    void *ctx)
 807 {
 808     int fd = context->log_context.log_fd;
 809     krb5_storage *sp;
 810
 811     lseek (fd, 0, SEEK_SET);
 812     sp = krb5_storage_from_fd (fd);
 813     for (;;) {
 814         int32_t ver, timestamp, op, len, len2, ver2;
 815
 816         if(krb5_ret_int32 (sp, &ver) != 0)
 817             break;
 818         krb5_ret_int32 (sp, &timestamp);
 819         krb5_ret_int32 (sp, &op);
 820         krb5_ret_int32 (sp, &len);
 821         (*func)(context, ver, timestamp, op, len, sp, ctx);
 822         krb5_ret_int32 (sp, &len2);
 823         krb5_ret_int32 (sp, &ver2);
 824         if (len != len2)
 825             abort();
 826         if (ver != ver2)
 827             abort();
 828     }
 829     krb5_storage_free(sp);
 830     return 0;
 831 }
 832
 833 /*
 834  * Go to end of log.
 835  */
 836
 837 krb5_storage *
 838 kadm5_log_goto_end (int fd)
 839 {
 840     krb5_storage *sp;
 841
 842     sp = krb5_storage_from_fd (fd);
 843     krb5_storage_seek(sp, 0, SEEK_END);
 844     return sp;
 845 }
 846
 847 /*
 848  * Return previous log entry.
 849  *
 850  * The pointer in `sp´ is assumed to be at the top of the entry before
 851  * previous entry. On success, the `sp´ pointer is set to data portion
 852  * of previous entry. In case of error, it's not changed at all.
 853  */
 854
 855 kadm5_ret_t
 856 kadm5_log_previous (krb5_context context,
 857                     krb5_storage *sp,
 858                     uint32_t *ver,
 859                     time_t *timestamp,
 860                     enum kadm_ops *op,
 861                     uint32_t *len)
 862 {
 863     krb5_error_code ret;
 864     off_t off, oldoff;
 865     int32_t tmp;
 866
 867     oldoff = krb5_storage_seek(sp, 0, SEEK_CUR);
 868
 869     krb5_storage_seek(sp, -8, SEEK_CUR);
 870     ret = krb5_ret_int32 (sp, &tmp);
 871     if (ret)
 872         goto end_of_storage;
 873     *len = tmp;
 874     ret = krb5_ret_int32 (sp, &tmp);
 875     if (ret)
 876         goto end_of_storage;
 877     *ver = tmp;
 878     off = 24 + *len;
 879     krb5_storage_seek(sp, -off, SEEK_CUR);
 880     ret = krb5_ret_int32 (sp, &tmp);
 881     if (ret)
 882         goto end_of_storage;
 883     if ((uint32_t)tmp != *ver) {
 884         krb5_storage_seek(sp, oldoff, SEEK_SET);
 885         krb5_set_error_message(context, KADM5_BAD_DB,
 886                                "kadm5_log_previous: log entry "
 887                                "have consistency failure, version number wrong "
 888                                "(tmp %lu ver %lu)",
 889                                (unsigned long)tmp,
 890                                (unsigned long)*ver);
 891         return KADM5_BAD_DB;
 892     }
 893     ret = krb5_ret_int32 (sp, &tmp);
 894     if (ret)
 895         goto end_of_storage;
 896     *timestamp = tmp;
 897     ret = krb5_ret_int32 (sp, &tmp);
 898     if (ret)
 899         goto end_of_storage;
 900     *op = tmp;
 901     ret = krb5_ret_int32 (sp, &tmp);
 902     if (ret)
 903         goto end_of_storage;
 904     if ((uint32_t)tmp != *len) {
 905         krb5_storage_seek(sp, oldoff, SEEK_SET);
 906         krb5_set_error_message(context, KADM5_BAD_DB,
 907                                "kadm5_log_previous: log entry "
 908                                "have consistency failure, length wrong");
 909         return KADM5_BAD_DB;
 910     }
 911     return 0;
 912
 913  end_of_storage:
 914     krb5_storage_seek(sp, oldoff, SEEK_SET);
 915     krb5_set_error_message(context, ret, "kadm5_log_previous: end of storage "
 916                            "reached before end");
 917     return ret;
 918 }
 919
 920 /*
 921  * Replay a record from the log
 922  */
 923
 924 kadm5_ret_t
 925 kadm5_log_replay (kadm5_server_context *context,
 926                   enum kadm_ops op,
 927                   uint32_t ver,
 928                   uint32_t len,
 929                   krb5_storage *sp)
 930 {
 931     switch (op) {
 932     case kadm_create :
 933         return kadm5_log_replay_create (context, ver, len, sp);
 934     case kadm_delete :
 935         return kadm5_log_replay_delete (context, ver, len, sp);
 936     case kadm_rename :
 937         return kadm5_log_replay_rename (context, ver, len, sp);
 938     case kadm_modify :
 939         return kadm5_log_replay_modify (context, ver, len, sp);
 940     case kadm_nop :
 941         return kadm5_log_replay_nop (context, ver, len, sp);
 942     default :
 943         krb5_set_error_message(context->context, KADM5_FAILURE,
 944                                "Unsupported replay op %d", (int)op);
 945         return KADM5_FAILURE;
 946     }
 947 }
 948
 949 /*
 950  * truncate the log - i.e. create an empty file with just (nop vno + 2)
 951  */
 952
 953 kadm5_ret_t
 954 kadm5_log_truncate (kadm5_server_context *server_context)
 955 {
 956     kadm5_ret_t ret;
 957     uint32_t vno;
 958
 959     ret = kadm5_log_init (server_context);
 960     if (ret)
 961         return ret;
 962
 963     ret = kadm5_log_get_version (server_context, &vno);
 964     if (ret)
 965         return ret;
 966
 967     ret = kadm5_log_reinit (server_context);
 968     if (ret)
 969         return ret;
 970
 971     ret = kadm5_log_set_version (server_context, vno);
 972     if (ret)
 973         return ret;
 974
 975     ret = kadm5_log_nop (server_context);
 976     if (ret)
 977         return ret;
 978
 979     ret = kadm5_log_end (server_context);
 980     if (ret)
 981         return ret;
 982     return 0;
 983
 984 }
 985
 986 #ifndef NO_UNIX_SOCKETS
 987
 988 static char *default_signal = NULL;
 989 static HEIMDAL_MUTEX signal_mutex = HEIMDAL_MUTEX_INITIALIZER;
 990
 991 const char *
 992 kadm5_log_signal_socket(krb5_context context)
 993 {
 994     HEIMDAL_MUTEX_lock(&signal_mutex);
 995     if (!default_signal)
 996         asprintf(&default_signal, "%s/signal", hdb_db_dir(context));
 997     HEIMDAL_MUTEX_unlock(&signal_mutex);
 998
 999     return krb5_config_get_string_default(context,
1000                                           NULL,
1001                                           default_signal,
1002                                           "kdc",
1003                                           "signal_socket",
1004                                           NULL);
1005 }
1006
1007 #else  /* NO_UNIX_SOCKETS */
1008
1009 #define SIGNAL_SOCKET_HOST "127.0.0.1"
1010 #define SIGNAL_SOCKET_PORT "12701"
1011
1012 kadm5_ret_t
1013 kadm5_log_signal_socket_info(krb5_context context,
1014                              int server_end,
1015                              struct addrinfo **ret_addrs)
1016 {
1017     struct addrinfo hints;
1018     struct addrinfo *addrs = NULL;
1019     kadm5_ret_t ret = KADM5_FAILURE;
1020     int wsret;
1021
1022     memset(&hints, 0, sizeof(hints));
1023
1024     hints.ai_flags = AI_NUMERICHOST;
1025     if (server_end)
1026         hints.ai_flags |= AI_PASSIVE;
1027     hints.ai_family = AF_INET;
1028     hints.ai_socktype = SOCK_STREAM;
1029     hints.ai_protocol = IPPROTO_TCP;
1030
1031     wsret = getaddrinfo(SIGNAL_SOCKET_HOST,
1032                         SIGNAL_SOCKET_PORT,
1033                         &hints, &addrs);
1034
1035     if (wsret != 0) {
1036         krb5_set_error_message(context, KADM5_FAILURE,
1037                                "%s", gai_strerror(wsret));
1038         goto done;
1039     }
1040
1041     if (addrs == NULL) {
1042         krb5_set_error_message(context, KADM5_FAILURE,
1043                                "getaddrinfo() failed to return address list");
1044         goto done;
1045     }
1046
1047     *ret_addrs = addrs;
1048     addrs = NULL;
1049     ret = 0;
1050
1051  done:
1052     if (addrs)
1053         freeaddrinfo(addrs);
1054     return ret;
1055 }
1056
1057 #endif