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 {
 133         snprintf(buffer, length, "%s/subkeys/%02X/%02X/%08X/%016" PRIX64,
 134                  config.db_dir,
 135                  (uint8_t) ((subkey >> 24) & 0xFF),
 136                  (uint8_t) ((subkey >> 16) & 0xFF),
 137                  (uint32_t) (subkey & 0xFFFFFFFF),
 138                  subkey);
 139 }
 140
 141 static void subkeydir(char *buffer, size_t length, uint64_t subkey)
 142 {
 143         snprintf(buffer, length, "%s/subkeys/%02X/%02X/%08X",
 144                  config.db_dir,
 145                  (uint8_t) ((subkey >> 24) & 0xFF),
 146                  (uint8_t) ((subkey >> 16) & 0xFF),
 147                  (uint32_t) (subkey & 0xFFFFFFFF));
 148 }
 149
 150 static void skshashpath(char *buffer, size_t length,
 151                 const struct skshash *hash)
 152 {
 153         snprintf(buffer, length, "%s/skshash/%02X/%02X/%02X%02X%02X%02X/"
 154                 "%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
 155                  config.db_dir,
 156                  hash->hash[0], hash->hash[1],
 157                  hash->hash[0], hash->hash[1], hash->hash[2], hash->hash[3],
 158                  hash->hash[4], hash->hash[5], hash->hash[6], hash->hash[7],
 159                  hash->hash[8], hash->hash[9], hash->hash[10], hash->hash[11],
 160                  hash->hash[12], hash->hash[13], hash->hash[14],
 161                  hash->hash[15]);
 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         fd = open(buffer, O_RDONLY);
 264         if (fd == -1 && errno == ENOENT) {
 265                 subkeypath(buffer, sizeof(buffer), keyid);
 266                 fd = open(buffer, O_RDONLY);
 267         }
 268
 269         if (fd != -1) {
 270                 /* File is present, load it in... */
 271                 read_openpgp_stream(file_fetchchar, &fd, &packets, 0);
 272                 parse_keys(packets, publickey);
 273                 free_packet_list(packets);
 274                 packets = NULL;
 275                 close(fd);
 276                 ret = 1;
 277         }
 278
 279         if (!intrans)
 280                 fs_endtrans(dbctx);
 281         return ret;
 282 }
 283
 284 /**
 285  *      store_key - Takes a key and stores it.
 286  *      @publickey: A pointer to the public key to store.
 287  *      @intrans: If we're already in a transaction.
 288  *      @update: If true the key exists and should be updated.
 289  */
 290 static int fs_store_key(struct onak_dbctx *dbctx,
 291               struct openpgp_publickey *publickey, bool intrans,
 292               bool update)
 293 {
 294         static char buffer[PATH_MAX];
 295         static char wbuffer[PATH_MAX];
 296         int ret = 0, fd;
 297         struct openpgp_packet_list *packets = NULL;
 298         struct openpgp_packet_list *list_end = NULL;
 299         struct openpgp_publickey *next = NULL;
 300         uint64_t keyid;
 301         struct ll *wordlist = NULL, *wl = NULL;
 302         struct skshash hash;
 303         uint64_t *subkeyids = NULL;
 304         uint32_t hashid;
 305         int i = 0;
 306
 307         if (get_keyid(publickey, &keyid) != ONAK_E_OK) {
 308                 logthing(LOGTHING_ERROR, "Couldn't find key ID for key.");
 309                 return 0;
 310         }
 311
 312         if (!intrans)
 313                 fs_starttrans(dbctx);
 314
 315         prove_path_to(keyid, "key");
 316         keypath(buffer, sizeof(buffer), keyid);
 317
 318         if ((fd =
 319              open(buffer, O_WRONLY | (update ? O_TRUNC : O_CREAT),
 320                   0644)) != -1) {
 321                 next = publickey->next;
 322                 publickey->next = NULL;
 323                 flatten_publickey(publickey, &packets, &list_end);
 324                 publickey->next = next;
 325
 326                 write_openpgp_stream(file_putchar, &fd, packets);
 327                 close(fd);
 328                 free_packet_list(packets);
 329                 packets = NULL;
 330                 ret = 1;
 331         }
 332
 333         if (ret) {
 334                 wl = wordlist = makewordlistfromkey(wordlist, publickey);
 335                 while (wl) {
 336                         uint32_t hash = calchash((uint8_t *) (wl->object));
 337                         prove_path_to(hash, "words");
 338
 339                         worddir(wbuffer, sizeof(wbuffer), wl->object, hash);
 340                         mkdir(wbuffer, 0777);
 341                         wordpath(wbuffer, sizeof(wbuffer), wl->object, hash,
 342                                 keyid);
 343                         link(buffer, wbuffer);
 344
 345                         wl = wl->next;
 346                 }
 347                 llfree(wordlist, free);
 348
 349                 subkeyids = keysubkeys(publickey);
 350                 i = 0;
 351                 while (subkeyids != NULL && subkeyids[i] != 0) {
 352                         prove_path_to(subkeyids[i], "subkeys");
 353
 354                         subkeydir(wbuffer, sizeof(wbuffer), subkeyids[i]);
 355                         mkdir(wbuffer, 0777);
 356                         subkeypath(wbuffer, sizeof(wbuffer), subkeyids[i]);
 357                         link(buffer, wbuffer);
 358
 359                         i++;
 360                 }
 361                 if (subkeyids != NULL) {
 362                         free(subkeyids);
 363                         subkeyids = NULL;
 364                 }
 365
 366                 get_skshash(publickey, &hash);
 367                 hashid = (hash.hash[0] << 24) + (hash.hash[1] << 16) +
 368                                 (hash.hash[2] << 8) + hash.hash[3];
 369                 prove_path_to(hashid, "skshash");
 370                 skshashpath(wbuffer, sizeof(wbuffer), &hash);
 371                 link(buffer, wbuffer);
 372         }
 373
 374         if (!intrans)
 375                 fs_endtrans(dbctx);
 376         return ret;
 377 }
 378
 379 /**
 380  *      delete_key - Given a keyid delete the key from storage.
 381  *      @keyid: The keyid to delete.
 382  *      @intrans: If we're already in a transaction.
 383  */
 384 static int fs_delete_key(struct onak_dbctx *dbctx, uint64_t keyid, bool intrans)
 385 {
 386         static char buffer[PATH_MAX];
 387         int ret;
 388         struct openpgp_publickey *pk = NULL;
 389         struct skshash hash;
 390         struct ll *wordlist = NULL, *wl = NULL;
 391         uint64_t *subkeyids = NULL;
 392         int i = 0;
 393
 394         if ((keyid >> 32) == 0)
 395                 keyid = fs_getfullkeyid(dbctx, keyid);
 396
 397         if (!intrans)
 398                 fs_starttrans(dbctx);
 399
 400         ret = fs_fetch_key_id(dbctx, keyid, &pk, true);
 401
 402         if (ret) {
 403                 logthing(LOGTHING_DEBUG, "Wordlist for key %016" PRIX64,
 404                          keyid);
 405                 wl = wordlist = makewordlistfromkey(wordlist, pk);
 406                 logthing(LOGTHING_DEBUG,
 407                          "Wordlist for key %016" PRIX64 " done", keyid);
 408                 while (wl) {
 409                         uint32_t hash = calchash((uint8_t *) (wl->object));
 410                         prove_path_to(hash, "words");
 411
 412                         wordpath(buffer, sizeof(buffer), wl->object, hash,
 413                                 keyid);
 414                         unlink(buffer);
 415
 416                         wl = wl->next;
 417                 }
 418
 419                 subkeyids = keysubkeys(pk);
 420                 i = 0;
 421                 while (subkeyids != NULL && subkeyids[i] != 0) {
 422                         prove_path_to(subkeyids[i], "subkeys");
 423
 424                         subkeypath(buffer, sizeof(buffer), subkeyids[i]);
 425                         unlink(buffer);
 426
 427                         i++;
 428                 }
 429                 if (subkeyids != NULL) {
 430                         free(subkeyids);
 431                         subkeyids = NULL;
 432                 }
 433
 434                 get_skshash(pk, &hash);
 435                 skshashpath(buffer, sizeof(buffer), &hash);
 436                 unlink(buffer);
 437         }
 438
 439         keypath(buffer, sizeof(buffer), keyid);
 440         unlink(buffer);
 441
 442         if (!intrans)
 443                 fs_endtrans(dbctx);
 444         return 1;
 445 }
 446
 447 static struct ll *internal_get_key_by_word(char *word, struct ll *mct)
 448 {
 449         struct ll *keys = NULL;
 450         DIR *d = NULL;
 451         char buffer[PATH_MAX];
 452         uint32_t hash = calchash((uint8_t *) (word));
 453         struct dirent *de;
 454
 455         worddir(buffer, sizeof(buffer), word, hash);
 456         d = opendir(buffer);
 457         logthing(LOGTHING_DEBUG, "Scanning for word %s in dir %s", word,
 458                  buffer);
 459         if (d) {
 460                 do {
 461                         de = readdir(d);
 462                         if (de && de->d_name[0] != '.') {
 463                                 if ((!mct)
 464                                     || (llfind(mct, de->d_name,
 465                                         (int (*)(const void *, const void *))
 466                                                     strcmp) !=
 467                                         NULL)) {
 468                                         logthing(LOGTHING_DEBUG,
 469                                                  "Found %s // %s", word,
 470                                                  de->d_name);
 471                                         keys =
 472                                             lladd(keys,
 473                                                   strdup(de->d_name));
 474                                 }
 475                         }
 476                 } while (de);
 477                 closedir(d);
 478         }
 479
 480         return keys;
 481 }
 482
 483 /*
 484  *      fetch_key_text - Trys to find the keys that contain the supplied text.
 485  *      @search: The text to search for.
 486  *      @publickey: A pointer to a structure to return the key in.
 487  */
 488 static int fs_fetch_key_text(struct onak_dbctx *dbctx,
 489                    const char *search,
 490                    struct openpgp_publickey **publickey)
 491 {
 492         struct ll *wordlist = NULL, *wl = NULL;
 493         struct ll *keylist = NULL;
 494         char      *searchtext = NULL;
 495         int addedkeys = 0;
 496
 497         logthing(LOGTHING_DEBUG, "Search was '%s'", search);
 498
 499         searchtext = strdup(search);
 500         wl = wordlist = makewordlist(wordlist, searchtext);
 501
 502         keylist = internal_get_key_by_word(wordlist->object, NULL);
 503
 504         if (!keylist) {
 505                 llfree(wordlist, NULL);
 506                 free(searchtext);
 507                 searchtext = NULL;
 508                 return 0;
 509         }
 510
 511         wl = wl->next;
 512         while (wl) {
 513                 struct ll *nkl =
 514                     internal_get_key_by_word(wl->object, keylist);
 515                 if (!nkl) {
 516                         llfree(wordlist, NULL);
 517                         llfree(keylist, free);
 518                         free(searchtext);
 519                         searchtext = NULL;
 520                         return 0;
 521                 }
 522                 llfree(keylist, free);
 523                 keylist = nkl;
 524                 wl = wl->next;
 525         }
 526
 527         llfree(wordlist, NULL);
 528
 529         /* Now add the keys... */
 530         wl = keylist;
 531         while (wl) {
 532                 logthing(LOGTHING_DEBUG, "Adding key: %s", wl->object);
 533                 addedkeys +=
 534                     fs_fetch_key_id(dbctx,
 535                               strtoull(wl->object, NULL, 16), publickey,
 536                               false);
 537                 if (addedkeys >= config.maxkeys)
 538                         break;
 539                 wl = wl->next;
 540         }
 541
 542         llfree(keylist, free);
 543         free(searchtext);
 544         searchtext = NULL;
 545
 546         return addedkeys;
 547 }
 548
 549 /**
 550  *      fetch_key_skshash - Given an SKS hash fetch the key from storage.
 551  *      @hash: The hash to fetch.
 552  *      @publickey: A pointer to a structure to return the key in.
 553  *      @intrans: If we're already in a transaction.
 554  */
 555 static int fs_fetch_key_skshash(struct onak_dbctx *dbctx,
 556               const struct skshash *hash,
 557               struct openpgp_publickey **publickey)
 558 {
 559         static char buffer[PATH_MAX];
 560         int ret = 0, fd;
 561         struct openpgp_packet_list *packets = NULL;
 562
 563         skshashpath(buffer, sizeof(buffer), hash);
 564         if ((fd = open(buffer, O_RDONLY)) != -1) {
 565                 read_openpgp_stream(file_fetchchar, &fd, &packets, 0);
 566                 parse_keys(packets, publickey);
 567                 free_packet_list(packets);
 568                 packets = NULL;
 569                 close(fd);
 570                 ret = 1;
 571         }
 572
 573         return ret;
 574 }
 575
 576 /**
 577  *      iterate_keys - call a function once for each key in the db.
 578  *      @iterfunc: The function to call.
 579  *      @ctx: A context pointer
 580  *
 581  *      Calls iterfunc once for each key in the database. ctx is passed
 582  *      unaltered to iterfunc. This function is intended to aid database dumps
 583  *      and statistic calculations.
 584  *
 585  *      Returns the number of keys we iterated over.
 586  */
 587 static int fs_iterate_keys(struct onak_dbctx *dbctx,
 588                 void (*iterfunc)(void *ctx,
 589                 struct openpgp_publickey *key), void *ctx)
 590 {
 591         return 0;
 592 }
 593
 594 /*
 595  * Include the basic keydb routines.
 596  */
 597 #define NEED_KEYID2UID 1
 598 #define NEED_GETKEYSIGS 1
 599 #define NEED_UPDATEKEYS 1
 600 #define NEED_GET_FP 1
 601 #include "keydb.c"
 602
 603 /**
 604  *      cleanupdb - De-initialize the key database.
 605  */
 606 static void fs_cleanupdb(struct onak_dbctx *dbctx)
 607 {
 608         struct onak_fs_dbctx *privctx = (struct onak_fs_dbctx *) dbctx->priv;
 609
 610         /* Mmmm nothing to do here? */
 611         close(privctx->lockfile_fd);
 612 }
 613
 614 /**
 615  *      initdb - Initialize the key database.
 616  */
 617 struct onak_dbctx *keydb_fs_init(bool readonly)
 618 {
 619         char buffer[PATH_MAX];
 620         struct onak_dbctx *dbctx;
 621         struct onak_fs_dbctx *privctx;
 622
 623         dbctx = malloc(sizeof(struct onak_dbctx));
 624         if (dbctx == NULL) {
 625                 return NULL;
 626         }
 627         dbctx->priv = privctx = malloc(sizeof(*privctx));
 628         if (privctx == NULL) {
 629                 free(dbctx);
 630                 return NULL;
 631         }
 632
 633         privctx->lockfile_readonly = readonly;
 634
 635         snprintf(buffer, sizeof(buffer), "%s/.lock", config.db_dir);
 636
 637         if (access(config.db_dir, R_OK | W_OK | X_OK) == -1) {
 638                 if (errno != ENOENT) {
 639                         logthing(LOGTHING_CRITICAL,
 640                                  "Unable to access keydb_fs root of '%s'. (%s)",
 641                                  config.db_dir, strerror(errno));
 642                         exit(1);        /* Lacking rwx on the key dir */
 643                 }
 644                 mkdir(config.db_dir, 0777);
 645                 privctx->lockfile_fd = open(buffer, O_RDWR | O_CREAT, 0600);
 646         }
 647         chdir(config.db_dir);
 648         privctx->lockfile_fd = open(buffer,
 649                                  (privctx->lockfile_readonly) ?
 650                                  O_RDONLY : O_RDWR);
 651         if (privctx->lockfile_fd == -1)
 652                 privctx->lockfile_fd = open(buffer, O_RDWR | O_CREAT, 0600);
 653         if (privctx->lockfile_fd == -1) {
 654                 logthing(LOGTHING_CRITICAL,
 655                          "Unable to open lockfile '%s'. (%s)",
 656                          buffer, strerror(errno));
 657                 exit(1);        /* Lacking rwx on the key dir */
 658         }
 659
 660         dbctx->cleanupdb                = fs_cleanupdb;
 661         dbctx->starttrans               = fs_starttrans;
 662         dbctx->endtrans                 = fs_endtrans;
 663         dbctx->fetch_key_id             = fs_fetch_key_id;
 664         dbctx->fetch_key_fp             = generic_fetch_key_fp;
 665         dbctx->fetch_key_text           = fs_fetch_key_text;
 666         dbctx->fetch_key_skshash        = fs_fetch_key_skshash;
 667         dbctx->store_key                = fs_store_key;
 668         dbctx->update_keys              = generic_update_keys;
 669         dbctx->delete_key               = fs_delete_key;
 670         dbctx->getkeysigs               = generic_getkeysigs;
 671         dbctx->cached_getkeysigs        = generic_cached_getkeysigs;
 672         dbctx->keyid2uid                = generic_keyid2uid;
 673         dbctx->getfullkeyid             = fs_getfullkeyid;
 674         dbctx->iterate_keys             = fs_iterate_keys;
 675
 676         return dbctx;
 677 }