keydb_fs.c

   1 /*
   2  * keydb_fs.c - Routines to store and fetch keys in a filesystem hierarchy.
   3  *
   4  * Copyright 2004 Daniel Silverstone <dsilvers@digital-scurf.org>
   5  *
   6  * This program is free software: you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the Free
   8  * Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc., 51
  17  * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  */
  19
  20 #include <sys/types.h>
  21 #include <sys/uio.h>
  22 #include <sys/stat.h>
  23 #include <errno.h>
  24 #include <fcntl.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <unistd.h>
  29 #include <limits.h>
  30 #include <dirent.h>
  31
  32 #include "charfuncs.h"
  33 #include "decodekey.h"
  34 #include "keydb.h"
  35 #include "keyid.h"
  36 #include "keystructs.h"
  37 #include "ll.h"
  38 #include "mem.h"
  39 #include "onak-conf.h"
  40 #include "parsekey.h"
  41 #include "log.h"
  42 #include "wordlist.h"
  43
  44 /* Hack: We should really dynamically allocate our path buffers */
  45 #ifndef PATH_MAX
  46 #define PATH_MAX 1024
  47 #endif
  48
  49 struct onak_fs_dbctx {
  50         int lockfile_fd;
  51         bool lockfile_readonly;
  52 };
  53
  54 /*****************************************************************************/
  55
  56 /* Helper functions */
  57
  58 #define FNV_offset_basis 2166136261ul
  59 #define FNV_mixing_prime 16777619ul
  60
  61 static uint32_t calchash(uint8_t * ptr)
  62 {
  63         register uint32_t h = FNV_offset_basis;
  64         register uint32_t p = FNV_mixing_prime;
  65         register uint32_t n = strlen((char *) ptr);
  66         register uint8_t *c = ptr;
  67         while (n--) {
  68                 h *= p;
  69                 h ^= *c++;
  70         }
  71         return h ? h : 1;       /* prevent a hash of zero happening */
  72 }
  73
  74
  75 static void keypath(char *buffer, size_t length, uint64_t _keyid)
  76 {
  77         uint64_t keyid = _keyid << 32;
  78         snprintf(buffer, length, "%s/key/%02X/%02X/%08X/%016" PRIX64,
  79                  config.db_dir, (uint8_t) ((keyid >> 56) & 0xFF),
  80                  (uint8_t) ((keyid >> 48) & 0xFF),
  81                  (uint32_t) (keyid >> 32), _keyid);
  82 }
  83
  84 static void keydir(char *buffer, size_t length, uint64_t _keyid)
  85 {
  86         uint64_t keyid = _keyid << 32;
  87         snprintf(buffer, length, "%s/key/%02X/%02X/%08X", config.db_dir,
  88                  (uint8_t) ((keyid >> 56) & 0xFF),
  89                  (uint8_t) ((keyid >> 48) & 0xFF),
  90                  (uint32_t) (keyid >> 32));
  91 }
  92
  93 static void prove_path_to(uint64_t keyid, char *what)
  94 {
  95         static char buffer[PATH_MAX];
  96         snprintf(buffer, sizeof(buffer), "%s/%s", config.db_dir, what);
  97         mkdir(buffer, 0777);
  98
  99         snprintf(buffer, sizeof(buffer), "%s/%s/%02X", config.db_dir, what,
 100                  (uint8_t) ((keyid >> 24) & 0xFF));
 101         mkdir(buffer, 0777);
 102
 103         snprintf(buffer, sizeof(buffer), "%s/%s/%02X/%02X", config.db_dir,
 104                  what,
 105                  (uint8_t) ((keyid >> 24) & 0xFF),
 106                  (uint8_t) ((keyid >> 16) & 0xFF));
 107         mkdir(buffer, 0777);
 108
 109         snprintf(buffer, sizeof(buffer), "%s/%s/%02X/%02X/%08X", config.db_dir,
 110                  what,
 111                  (uint8_t) ((keyid >> 24) & 0xFF),
 112                  (uint8_t) ((keyid >> 16) & 0xFF), (uint32_t) (keyid));
 113         mkdir(buffer, 0777);
 114 }
 115
 116 static void wordpath(char *buffer, size_t length, char *word, uint32_t hash,
 117                 uint64_t keyid)
 118 {
 119         snprintf(buffer, length, "%s/words/%02X/%02X/%08X/%s/%016" PRIX64,
 120                  config.db_dir, (uint8_t) ((hash >> 24) & 0xFF),
 121                  (uint8_t) ((hash >> 16) & 0xFF), hash, word, keyid);
 122 }
 123
 124 static void worddir(char *buffer, size_t length, char *word, uint32_t hash)
 125 {
 126         snprintf(buffer, length, "%s/words/%02X/%02X/%08X/%s", config.db_dir,
 127                  (uint8_t) ((hash >> 24) & 0xFF),
 128                  (uint8_t) ((hash >> 16) & 0xFF), hash, word);
 129 }
 130
 131 static void subkeypath(char *buffer, size_t length, uint64_t subkey,
 132                 uint64_t keyid)
 133 {
 134         snprintf(buffer, length, "%s/subkeys/%02X/%02X/%08X/%016" PRIX64,
 135                  config.db_dir,
 136                  (uint8_t) ((subkey >> 24) & 0xFF),
 137                  (uint8_t) ((subkey >> 16) & 0xFF),
 138                  (uint32_t) (subkey & 0xFFFFFFFF),
 139                  keyid);
 140 }
 141
 142 static void skshashpath(char *buffer, size_t length,
 143                 const struct skshash *hash)
 144 {
 145         snprintf(buffer, length, "%s/skshash/%02X/%02X/%02X%02X%02X%02X/"
 146                 "%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
 147                  config.db_dir,
 148                  hash->hash[0], hash->hash[1],
 149                  hash->hash[0], hash->hash[1], hash->hash[2], hash->hash[3],
 150                  hash->hash[4], hash->hash[5], hash->hash[6], hash->hash[7],
 151                  hash->hash[8], hash->hash[9], hash->hash[10], hash->hash[11],
 152                  hash->hash[12], hash->hash[13], hash->hash[14],
 153                  hash->hash[15]);
 154 }
 155 static void subkeydir(char *buffer, size_t length, uint64_t subkey)
 156 {
 157         snprintf(buffer, length, "%s/subkeys/%02X/%02X/%08X",
 158                  config.db_dir,
 159                  (uint8_t) ((subkey >> 24) & 0xFF),
 160                  (uint8_t) ((subkey >> 16) & 0xFF),
 161                  (uint32_t) (subkey & 0xFFFFFFFF));
 162 }
 163
 164 /*****************************************************************************/
 165
 166 /**
 167  *      starttrans - Start a transaction.
 168  */
 169 static bool fs_starttrans(struct onak_dbctx *dbctx)
 170 {
 171         struct onak_fs_dbctx *privctx = (struct onak_fs_dbctx *) dbctx->priv;
 172         struct flock lockstruct;
 173         int remaining = 20;
 174         lockstruct.l_type =
 175             F_RDLCK | ((privctx->lockfile_readonly) ? 0 : F_WRLCK);
 176         lockstruct.l_whence = SEEK_SET;
 177         lockstruct.l_start = 0;
 178         lockstruct.l_len = 1;
 179
 180         while (fcntl(privctx->lockfile_fd, F_SETLK, &lockstruct) == -1) {
 181                 if (remaining-- == 0)
 182                         return false;   /* Hope to hell that noodles DTRT */
 183                 usleep(100);
 184         }
 185         return true;
 186 }
 187
 188 /**
 189  *      endtrans - End a transaction.
 190  */
 191 static void fs_endtrans(struct onak_dbctx *dbctx)
 192 {
 193         struct onak_fs_dbctx *privctx = (struct onak_fs_dbctx *) dbctx->priv;
 194         struct flock lockstruct;
 195
 196         lockstruct.l_type = F_UNLCK;
 197         lockstruct.l_whence = SEEK_SET;
 198         lockstruct.l_start = 0;
 199         lockstruct.l_len = 1;
 200         fcntl(privctx->lockfile_fd, F_SETLK, &lockstruct);
 201 }
 202
 203 static uint64_t fs_getfullkeyid(struct onak_dbctx *dbctx, uint64_t keyid)
 204 {
 205         static char buffer[PATH_MAX];
 206         DIR *d = NULL;
 207         struct dirent *de = NULL;
 208         uint64_t ret = 0;
 209
 210         keydir(buffer, sizeof(buffer), keyid);
 211
 212         d = opendir(buffer);
 213         if (d) {
 214                 do {
 215                         de = readdir(d);
 216                         if (de && de->d_name[0] != '.') {
 217                                 ret = strtoull(de->d_name, NULL, 16);
 218                         }
 219                 } while (de && de->d_name[0] == '.');
 220                 closedir(d);
 221         }
 222
 223         if (ret == 0) {
 224                 subkeydir(buffer, sizeof(buffer), keyid);
 225
 226                 d = opendir(buffer);
 227                 if (d) {
 228                         do {
 229                                 de = readdir(d);
 230                                 if (de && de->d_name[0] != '.') {
 231                                         ret = strtoull(de->d_name, NULL, 16);
 232                                 }
 233                         } while (de && de->d_name[0] == '.');
 234                         closedir(d);
 235                 }
 236         }
 237
 238         return ret;
 239 }
 240
 241 /**
 242  *      fetch_key - Given a keyid fetch the key from storage.
 243  *      @keyid: The keyid to fetch.
 244  *      @publickey: A pointer to a structure to return the key in.
 245  *      @intrans: If we're already in a transaction.
 246  */
 247 static int fs_fetch_key_id(struct onak_dbctx *dbctx,
 248               uint64_t keyid,
 249               struct openpgp_publickey **publickey,
 250               bool intrans)
 251 {
 252         static char buffer[PATH_MAX];
 253         int ret = 0, fd;
 254         struct openpgp_packet_list *packets = NULL;
 255
 256         if (!intrans)
 257                 fs_starttrans(dbctx);
 258
 259         if ((keyid >> 32) == 0)
 260                 keyid = fs_getfullkeyid(dbctx, keyid);
 261
 262         keypath(buffer, sizeof(buffer), keyid);
 263         if ((fd = open(buffer, O_RDONLY)) != -1) {
 264                 /* File is present, load it in... */
 265                 read_openpgp_stream(file_fetchchar, &fd, &packets, 0);
 266                 parse_keys(packets, publickey);
 267                 free_packet_list(packets);
 268                 packets = NULL;
 269                 close(fd);
 270                 ret = 1;
 271         }
 272
 273         if (!intrans)
 274                 fs_endtrans(dbctx);
 275         return ret;
 276 }
 277
 278 /**
 279  *      store_key - Takes a key and stores it.
 280  *      @publickey: A pointer to the public key to store.
 281  *      @intrans: If we're already in a transaction.
 282  *      @update: If true the key exists and should be updated.
 283  */
 284 static int fs_store_key(struct onak_dbctx *dbctx,
 285               struct openpgp_publickey *publickey, bool intrans,
 286               bool update)
 287 {
 288         static char buffer[PATH_MAX];
 289         static char wbuffer[PATH_MAX];
 290         int ret = 0, fd;
 291         struct openpgp_packet_list *packets = NULL;
 292         struct openpgp_packet_list *list_end = NULL;
 293         struct openpgp_publickey *next = NULL;
 294         uint64_t keyid;
 295         struct ll *wordlist = NULL, *wl = NULL;
 296         struct skshash hash;
 297         uint64_t *subkeyids = NULL;
 298         uint32_t hashid;
 299         int i = 0;
 300
 301         if (get_keyid(publickey, &keyid) != ONAK_E_OK) {
 302                 logthing(LOGTHING_ERROR, "Couldn't find key ID for key.");
 303                 return 0;
 304         }
 305
 306         if (!intrans)
 307                 fs_starttrans(dbctx);
 308
 309         prove_path_to(keyid, "key");
 310         keypath(buffer, sizeof(buffer), keyid);
 311
 312         if ((fd =
 313              open(buffer, O_WRONLY | (update ? O_TRUNC : O_CREAT),
 314                   0644)) != -1) {
 315                 next = publickey->next;
 316                 publickey->next = NULL;
 317                 flatten_publickey(publickey, &packets, &list_end);
 318                 publickey->next = next;
 319
 320                 write_openpgp_stream(file_putchar, &fd, packets);
 321                 close(fd);
 322                 free_packet_list(packets);
 323                 packets = NULL;
 324                 ret = 1;
 325         }
 326
 327         if (ret) {
 328                 wl = wordlist = makewordlistfromkey(wordlist, publickey);
 329                 while (wl) {
 330                         uint32_t hash = calchash((uint8_t *) (wl->object));
 331                         prove_path_to(hash, "words");
 332
 333                         worddir(wbuffer, sizeof(wbuffer), wl->object, hash);
 334                         mkdir(wbuffer, 0777);
 335                         wordpath(wbuffer, sizeof(wbuffer), wl->object, hash,
 336                                 keyid);
 337                         link(buffer, wbuffer);
 338
 339                         wl = wl->next;
 340                 }
 341                 llfree(wordlist, free);
 342
 343                 subkeyids = keysubkeys(publickey);
 344                 i = 0;
 345                 while (subkeyids != NULL && subkeyids[i] != 0) {
 346                         prove_path_to(subkeyids[i], "subkeys");
 347
 348                         subkeydir(wbuffer, sizeof(wbuffer), subkeyids[i]);
 349                         mkdir(wbuffer, 0777);
 350                         subkeypath(wbuffer, sizeof(wbuffer), subkeyids[i],
 351                                 keyid);
 352                         link(buffer, wbuffer);
 353
 354                         i++;
 355                 }
 356                 if (subkeyids != NULL) {
 357                         free(subkeyids);
 358                         subkeyids = NULL;
 359                 }
 360
 361                 get_skshash(publickey, &hash);
 362                 hashid = (hash.hash[0] << 24) + (hash.hash[1] << 16) +
 363                                 (hash.hash[2] << 8) + hash.hash[3];
 364                 prove_path_to(hashid, "skshash");
 365                 skshashpath(wbuffer, sizeof(wbuffer), &hash);
 366                 link(buffer, wbuffer);
 367         }
 368
 369         if (!intrans)
 370                 fs_endtrans(dbctx);
 371         return ret;
 372 }
 373
 374 /**
 375  *      delete_key - Given a keyid delete the key from storage.
 376  *      @keyid: The keyid to delete.
 377  *      @intrans: If we're already in a transaction.
 378  */
 379 static int fs_delete_key(struct onak_dbctx *dbctx, uint64_t keyid, bool intrans)
 380 {
 381         static char buffer[PATH_MAX];
 382         int ret;
 383         struct openpgp_publickey *pk = NULL;
 384         struct skshash hash;
 385         struct ll *wordlist = NULL, *wl = NULL;
 386         uint64_t *subkeyids = NULL;
 387         int i = 0;
 388
 389         if ((keyid >> 32) == 0)
 390                 keyid = fs_getfullkeyid(dbctx, keyid);
 391
 392         if (!intrans)
 393                 fs_starttrans(dbctx);
 394
 395         ret = fs_fetch_key_id(dbctx, keyid, &pk, true);
 396
 397         if (ret) {
 398                 logthing(LOGTHING_DEBUG, "Wordlist for key %016" PRIX64,
 399                          keyid);
 400                 wl = wordlist = makewordlistfromkey(wordlist, pk);
 401                 logthing(LOGTHING_DEBUG,
 402                          "Wordlist for key %016" PRIX64 " done", keyid);
 403                 while (wl) {
 404                         uint32_t hash = calchash((uint8_t *) (wl->object));
 405                         prove_path_to(hash, "words");
 406
 407                         wordpath(buffer, sizeof(buffer), wl->object, hash,
 408                                 keyid);
 409                         unlink(buffer);
 410
 411                         wl = wl->next;
 412                 }
 413
 414                 subkeyids = keysubkeys(pk);
 415                 i = 0;
 416                 while (subkeyids != NULL && subkeyids[i] != 0) {
 417                         prove_path_to(subkeyids[i], "subkeys");
 418
 419                         subkeypath(buffer, sizeof(buffer), subkeyids[i],
 420                                 keyid);
 421                         unlink(buffer);
 422
 423                         i++;
 424                 }
 425                 if (subkeyids != NULL) {
 426                         free(subkeyids);
 427                         subkeyids = NULL;
 428                 }
 429
 430                 get_skshash(pk, &hash);
 431                 skshashpath(buffer, sizeof(buffer), &hash);
 432                 unlink(buffer);
 433         }
 434
 435         keypath(buffer, sizeof(buffer), keyid);
 436         unlink(buffer);
 437
 438         if (!intrans)
 439                 fs_endtrans(dbctx);
 440         return 1;
 441 }
 442
 443 static struct ll *internal_get_key_by_word(char *word, struct ll *mct)
 444 {
 445         struct ll *keys = NULL;
 446         DIR *d = NULL;
 447         char buffer[PATH_MAX];
 448         uint32_t hash = calchash((uint8_t *) (word));
 449         struct dirent *de;
 450
 451         worddir(buffer, sizeof(buffer), word, hash);
 452         d = opendir(buffer);
 453         logthing(LOGTHING_DEBUG, "Scanning for word %s in dir %s", word,
 454                  buffer);
 455         if (d) {
 456                 do {
 457                         de = readdir(d);
 458                         if (de && de->d_name[0] != '.') {
 459                                 if ((!mct)
 460                                     || (llfind(mct, de->d_name,
 461                                         (int (*)(const void *, const void *))
 462                                                     strcmp) !=
 463                                         NULL)) {
 464                                         logthing(LOGTHING_DEBUG,
 465                                                  "Found %s // %s", word,
 466                                                  de->d_name);
 467                                         keys =
 468                                             lladd(keys,
 469                                                   strdup(de->d_name));
 470                                 }
 471                         }
 472                 } while (de);
 473                 closedir(d);
 474         }
 475
 476         return keys;
 477 }
 478
 479 /*
 480  *      fetch_key_text - Trys to find the keys that contain the supplied text.
 481  *      @search: The text to search for.
 482  *      @publickey: A pointer to a structure to return the key in.
 483  */
 484 static int fs_fetch_key_text(struct onak_dbctx *dbctx,
 485                    const char *search,
 486                    struct openpgp_publickey **publickey)
 487 {
 488         struct ll *wordlist = NULL, *wl = NULL;
 489         struct ll *keylist = NULL;
 490         char      *searchtext = NULL;
 491         int addedkeys = 0;
 492
 493         logthing(LOGTHING_DEBUG, "Search was '%s'", search);
 494
 495         searchtext = strdup(search);
 496         wl = wordlist = makewordlist(wordlist, searchtext);
 497
 498         keylist = internal_get_key_by_word(wordlist->object, NULL);
 499
 500         if (!keylist) {
 501                 llfree(wordlist, NULL);
 502                 free(searchtext);
 503                 searchtext = NULL;
 504                 return 0;
 505         }
 506
 507         wl = wl->next;
 508         while (wl) {
 509                 struct ll *nkl =
 510                     internal_get_key_by_word(wl->object, keylist);
 511                 if (!nkl) {
 512                         llfree(wordlist, NULL);
 513                         llfree(keylist, free);
 514                         free(searchtext);
 515                         searchtext = NULL;
 516                         return 0;
 517                 }
 518                 llfree(keylist, free);
 519                 keylist = nkl;
 520                 wl = wl->next;
 521         }
 522
 523         llfree(wordlist, NULL);
 524
 525         /* Now add the keys... */
 526         wl = keylist;
 527         while (wl) {
 528                 logthing(LOGTHING_DEBUG, "Adding key: %s", wl->object);
 529                 addedkeys +=
 530                     fs_fetch_key_id(dbctx,
 531                               strtoull(wl->object, NULL, 16), publickey,
 532                               false);
 533                 if (addedkeys >= config.maxkeys)
 534                         break;
 535                 wl = wl->next;
 536         }
 537
 538         llfree(keylist, free);
 539         free(searchtext);
 540         searchtext = NULL;
 541
 542         return addedkeys;
 543 }
 544
 545 /**
 546  *      fetch_key_skshash - Given an SKS hash fetch the key from storage.
 547  *      @hash: The hash to fetch.
 548  *      @publickey: A pointer to a structure to return the key in.
 549  *      @intrans: If we're already in a transaction.
 550  */
 551 static int fs_fetch_key_skshash(struct onak_dbctx *dbctx,
 552               const struct skshash *hash,
 553               struct openpgp_publickey **publickey)
 554 {
 555         static char buffer[PATH_MAX];
 556         int ret = 0, fd;
 557         struct openpgp_packet_list *packets = NULL;
 558
 559         skshashpath(buffer, sizeof(buffer), hash);
 560         if ((fd = open(buffer, O_RDONLY)) != -1) {
 561                 read_openpgp_stream(file_fetchchar, &fd, &packets, 0);
 562                 parse_keys(packets, publickey);
 563                 free_packet_list(packets);
 564                 packets = NULL;
 565                 close(fd);
 566                 ret = 1;
 567         }
 568
 569         return ret;
 570 }
 571
 572 /**
 573  *      iterate_keys - call a function once for each key in the db.
 574  *      @iterfunc: The function to call.
 575  *      @ctx: A context pointer
 576  *
 577  *      Calls iterfunc once for each key in the database. ctx is passed
 578  *      unaltered to iterfunc. This function is intended to aid database dumps
 579  *      and statistic calculations.
 580  *
 581  *      Returns the number of keys we iterated over.
 582  */
 583 static int fs_iterate_keys(struct onak_dbctx *dbctx,
 584                 void (*iterfunc)(void *ctx,
 585                 struct openpgp_publickey *key), void *ctx)
 586 {
 587         return 0;
 588 }
 589
 590 /*
 591  * Include the basic keydb routines.
 592  */
 593 #define NEED_KEYID2UID 1
 594 #define NEED_GETKEYSIGS 1
 595 #define NEED_UPDATEKEYS 1
 596 #define NEED_GET_FP 1
 597 #include "keydb.c"
 598
 599 /**
 600  *      cleanupdb - De-initialize the key database.
 601  */
 602 static void fs_cleanupdb(struct onak_dbctx *dbctx)
 603 {
 604         struct onak_fs_dbctx *privctx = (struct onak_fs_dbctx *) dbctx->priv;
 605
 606         /* Mmmm nothing to do here? */
 607         close(privctx->lockfile_fd);
 608 }
 609
 610 /**
 611  *      initdb - Initialize the key database.
 612  */
 613 struct onak_dbctx *keydb_fs_init(bool readonly)
 614 {
 615         char buffer[PATH_MAX];
 616         struct onak_dbctx *dbctx;
 617         struct onak_fs_dbctx *privctx;
 618
 619         dbctx = malloc(sizeof(struct onak_dbctx));
 620         if (dbctx == NULL) {
 621                 return NULL;
 622         }
 623         dbctx->priv = privctx = malloc(sizeof(*privctx));
 624         if (privctx == NULL) {
 625                 free(dbctx);
 626                 return NULL;
 627         }
 628
 629         privctx->lockfile_readonly = readonly;
 630
 631         snprintf(buffer, sizeof(buffer), "%s/.lock", config.db_dir);
 632
 633         if (access(config.db_dir, R_OK | W_OK | X_OK) == -1) {
 634                 if (errno != ENOENT) {
 635                         logthing(LOGTHING_CRITICAL,
 636                                  "Unable to access keydb_fs root of '%s'. (%s)",
 637                                  config.db_dir, strerror(errno));
 638                         exit(1);        /* Lacking rwx on the key dir */
 639                 }
 640                 mkdir(config.db_dir, 0777);
 641                 privctx->lockfile_fd = open(buffer, O_RDWR | O_CREAT, 0600);
 642         }
 643         chdir(config.db_dir);
 644         privctx->lockfile_fd = open(buffer,
 645                                  (privctx->lockfile_readonly) ?
 646                                  O_RDONLY : O_RDWR);
 647         if (privctx->lockfile_fd == -1)
 648                 privctx->lockfile_fd = open(buffer, O_RDWR | O_CREAT, 0600);
 649         if (privctx->lockfile_fd == -1) {
 650                 logthing(LOGTHING_CRITICAL,
 651                          "Unable to open lockfile '%s'. (%s)",
 652                          buffer, strerror(errno));
 653                 exit(1);        /* Lacking rwx on the key dir */
 654         }
 655
 656         dbctx->cleanupdb                = fs_cleanupdb;
 657         dbctx->starttrans               = fs_starttrans;
 658         dbctx->endtrans                 = fs_endtrans;
 659         dbctx->fetch_key_id             = fs_fetch_key_id;
 660         dbctx->fetch_key_fp             = generic_fetch_key_fp;
 661         dbctx->fetch_key_text           = fs_fetch_key_text;
 662         dbctx->fetch_key_skshash        = fs_fetch_key_skshash;
 663         dbctx->store_key                = fs_store_key;
 664         dbctx->update_keys              = generic_update_keys;
 665         dbctx->delete_key               = fs_delete_key;
 666         dbctx->getkeysigs               = generic_getkeysigs;
 667         dbctx->cached_getkeysigs        = generic_cached_getkeysigs;
 668         dbctx->keyid2uid                = generic_keyid2uid;
 669         dbctx->getfullkeyid             = fs_getfullkeyid;
 670         dbctx->iterate_keys             = fs_iterate_keys;
 671
 672         return dbctx;
 673 }