keydb_db4.c

   1 /*
   2  * keydb_db4.c - Routines to store and fetch keys in a DB4 database.
   3  *
   4  * Jonathan McDowell <noodles@earth.li>
   5  *
   6  * Copyright 2002-2004 Project Purple
   7  */
   8
   9 #include <sys/types.h>
  10 #include <sys/uio.h>
  11 #include <ctype.h>
  12 #include <errno.h>
  13 #include <fcntl.h>
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16 #include <string.h>
  17 #include <unistd.h>
  18
  19 #include <db.h>
  20
  21 #include "charfuncs.h"
  22 #include "keyarray.h"
  23 #include "keydb.h"
  24 #include "keyid.h"
  25 #include "decodekey.h"
  26 #include "keystructs.h"
  27 #include "mem.h"
  28 #include "log.h"
  29 #include "onak-conf.h"
  30 #include "parsekey.h"
  31 #include "wordlist.h"
  32
  33 /**
  34  *      dbenv - our database environment.
  35  */
  36 static DB_ENV *dbenv = NULL;
  37
  38 /**
  39  *      numdb - The number of database files we have.
  40  */
  41 static int numdbs = 16;
  42
  43 /**
  44  *      dbconn - our connections to the key database files.
  45  */
  46 static DB **dbconns = NULL;
  47
  48 /**
  49  *      worddb - our connection to the word database.
  50  */
  51 static DB *worddb = NULL;
  52
  53 /**
  54  *      id32db - our connection to the 32bit ID database.
  55  */
  56 static DB *id32db = NULL;
  57
  58 /**
  59  *      txn - our current transaction id.
  60  */
  61 static DB_TXN *txn = NULL;
  62
  63 DB *keydb(uint64_t keyid)
  64 {
  65         uint64_t keytrun;
  66
  67         keytrun = keyid >> 8;
  68
  69         return(dbconns[keytrun % numdbs]);
  70 }
  71
  72 /**
  73  *      starttrans - Start a transaction.
  74  *
  75  *      Start a transaction. Intended to be used if we're about to perform many
  76  *      operations on the database to help speed it all up, or if we want
  77  *      something to only succeed if all relevant operations are successful.
  78  */
  79 static bool db4_starttrans(void)
  80 {
  81         int ret;
  82
  83         log_assert(dbenv != NULL);
  84         log_assert(txn == NULL);
  85
  86         ret = dbenv->txn_begin(dbenv,
  87                 NULL, /* No parent transaction */
  88                 &txn,
  89                 0);
  90         if (ret != 0) {
  91                 logthing(LOGTHING_CRITICAL,
  92                                 "Error starting transaction: %s",
  93                                 db_strerror(ret));
  94                 exit(1);
  95         }
  96
  97         return true;
  98 }
  99
 100 /**
 101  *      endtrans - End a transaction.
 102  *
 103  *      Ends a transaction.
 104  */
 105 static void db4_endtrans(void)
 106 {
 107         int ret;
 108
 109         log_assert(dbenv != NULL);
 110         log_assert(txn != NULL);
 111
 112         ret = txn->commit(txn,
 113                 0);
 114         if (ret != 0) {
 115                 logthing(LOGTHING_CRITICAL,
 116                                 "Error ending transaction: %s",
 117                                 db_strerror(ret));
 118                 exit(1);
 119         }
 120         txn = NULL;
 121
 122         return;
 123 }
 124
 125 /**
 126  *      cleanupdb - De-initialize the key database.
 127  *
 128  *      This function should be called upon program exit to allow the DB to
 129  *      cleanup after itself.
 130  */
 131 static void db4_cleanupdb(void)
 132 {
 133         int i = 0;
 134
 135         if (dbenv != NULL) {
 136                 dbenv->txn_checkpoint(dbenv, 0, 0, 0);
 137                 if (id32db != NULL) {
 138                         id32db->close(id32db, 0);
 139                         id32db = NULL;
 140                 }
 141                 if (worddb != NULL) {
 142                         worddb->close(worddb, 0);
 143                         worddb = NULL;
 144                 }
 145                 for (i = 0; i < numdbs; i++) {
 146                         if (dbconns[i] != NULL) {
 147                                 dbconns[i]->close(dbconns[i], 0);
 148                                 dbconns[i] = NULL;
 149                         }
 150                 }
 151                 free(dbconns);
 152                 dbconns = NULL;
 153                 dbenv->close(dbenv, 0);
 154                 dbenv = NULL;
 155         }
 156 }
 157
 158 /**
 159  *      initdb - Initialize the key database.
 160  *
 161  *      This function should be called before any of the other functions in
 162  *      this file are called in order to allow the DB to be initialized ready
 163  *      for access.
 164  */
 165 static void db4_initdb(bool readonly)
 166 {
 167         char       buf[1024];
 168         FILE      *numdb = NULL;
 169         int        ret = 0;
 170         int        i = 0;
 171         u_int32_t  flags = 0;
 172
 173         snprintf(buf, sizeof(buf) - 1, "%s/num_keydb", config.db_dir);
 174         numdb = fopen(buf, "r");
 175         if (numdb != NULL) {
 176                 if (fgets(buf, sizeof(buf), numdb) != NULL) {
 177                         numdbs = atoi(buf);
 178                 }
 179                 fclose(numdb);
 180         } else if (!readonly) {
 181                 logthing(LOGTHING_ERROR, "Couldn't open num_keydb: %s",
 182                                 strerror(errno));
 183                 numdb = fopen(buf, "w");
 184                 if (numdb != NULL) {
 185                         fprintf(numdb, "%d", numdbs);
 186                         fclose(numdb);
 187                 } else {
 188                         logthing(LOGTHING_ERROR,
 189                                 "Couldn't write num_keydb: %s",
 190                                 strerror(errno));
 191                 }
 192         }
 193
 194         dbconns = malloc(sizeof (DB *) * numdbs);
 195         if (dbconns == NULL) {
 196                 logthing(LOGTHING_CRITICAL,
 197                                 "Couldn't allocate memory for dbconns");
 198                 ret = 1;
 199         }
 200
 201         if (ret == 0) {
 202                 ret = db_env_create(&dbenv, 0);
 203                 if (ret != 0) {
 204                         logthing(LOGTHING_CRITICAL,
 205                                 "db_env_create: %s", db_strerror(ret));
 206                 }
 207         }
 208
 209         /*
 210          * Enable deadlock detection so that we don't block indefinitely on
 211          * anything. What we really want is simple 2 state locks, but I'm not
 212          * sure how to make the standard DB functions do that yet.
 213          */
 214         if (ret == 0) {
 215                 ret = dbenv->set_lk_detect(dbenv, DB_LOCK_DEFAULT);
 216                 if (ret != 0) {
 217                         logthing(LOGTHING_CRITICAL,
 218                                 "db_env_create: %s", db_strerror(ret));
 219                 }
 220         }
 221
 222         if (ret == 0) {
 223                 ret = dbenv->open(dbenv, config.db_dir,
 224                                 DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_LOCK |
 225                                 DB_INIT_TXN |
 226                                 DB_CREATE,
 227                                 0);
 228                 if (ret != 0) {
 229                         logthing(LOGTHING_CRITICAL,
 230                                         "Error opening db environment: %s (%s)",
 231                                         config.db_dir,
 232                                         db_strerror(ret));
 233                         dbenv->close(dbenv, 0);
 234                         dbenv = NULL;
 235                 }
 236         }
 237
 238         if (ret == 0) {
 239                 db4_starttrans();
 240
 241                 for (i = 0; !ret && i < numdbs; i++) {
 242                         ret = db_create(&dbconns[i], dbenv, 0);
 243                         if (ret != 0) {
 244                                 logthing(LOGTHING_CRITICAL,
 245                                         "db_create: %s", db_strerror(ret));
 246                         }
 247
 248                         if (ret == 0) {
 249                                 snprintf(buf, 1023, "keydb.%d.db", i);
 250                                 flags = DB_CREATE;
 251                                 if (readonly) {
 252                                         flags = DB_RDONLY;
 253                                 }
 254                                 ret = dbconns[i]->open(dbconns[i],
 255                                                 txn,
 256                                                 buf,
 257                                                 "keydb",
 258                                                 DB_HASH,
 259                                                 flags,
 260                                                 0664);
 261                                 if (ret != 0) {
 262                                         logthing(LOGTHING_CRITICAL,
 263                                                 "Error opening key database:"
 264                                                 " %s (%s)",
 265                                                 buf,
 266                                                 db_strerror(ret));
 267                                 }
 268                         }
 269                 }
 270
 271         }
 272
 273         if (ret == 0) {
 274                 ret = db_create(&worddb, dbenv, 0);
 275                 if (ret != 0) {
 276                         logthing(LOGTHING_CRITICAL, "db_create: %s",
 277                                         db_strerror(ret));
 278                 }
 279         }
 280
 281         if (ret == 0) {
 282                 ret = worddb->set_flags(worddb, DB_DUP);
 283         }
 284
 285         if (ret == 0) {
 286                 ret = worddb->open(worddb, txn, "worddb", "worddb", DB_BTREE,
 287                                 flags,
 288                                 0664);
 289                 if (ret != 0) {
 290                         logthing(LOGTHING_CRITICAL,
 291                                         "Error opening word database: %s (%s)",
 292                                         "worddb",
 293                                         db_strerror(ret));
 294                 }
 295         }
 296
 297         if (ret == 0) {
 298                 ret = db_create(&id32db, dbenv, 0);
 299                 if (ret != 0) {
 300                         logthing(LOGTHING_CRITICAL, "db_create: %s",
 301                                         db_strerror(ret));
 302                 }
 303         }
 304
 305         if (ret == 0) {
 306                 ret = id32db->set_flags(id32db, DB_DUP);
 307         }
 308
 309         if (ret == 0) {
 310                 ret = id32db->open(id32db, txn, "id32db", "id32db", DB_HASH,
 311                                 flags,
 312                                 0664);
 313                 if (ret != 0) {
 314                         logthing(LOGTHING_CRITICAL,
 315                                         "Error opening id32 database: %s (%s)",
 316                                         "id32db",
 317                                         db_strerror(ret));
 318                 }
 319         }
 320
 321         if (txn != NULL) {
 322                 db4_endtrans();
 323         }
 324
 325         if (ret != 0) {
 326                 db4_cleanupdb();
 327                 logthing(LOGTHING_CRITICAL,
 328                                 "Error opening database; exiting");
 329                 exit(EXIT_FAILURE);
 330         }
 331
 332         return;
 333 }
 334
 335 /**
 336  *      getfullkeyid - Maps a 32bit key id to a 64bit one.
 337  *      @keyid: The 32bit keyid.
 338  *
 339  *      This function maps a 32bit key id to the full 64bit one. It returns the
 340  *      full keyid. If the key isn't found a keyid of 0 is returned.
 341  */
 342 static uint64_t db4_getfullkeyid(uint64_t keyid)
 343 {
 344         DBT       key, data;
 345         DBC      *cursor = NULL;
 346         uint32_t  shortkeyid = 0;
 347         int       ret = 0;
 348
 349         if (keyid < 0x100000000LL) {
 350                 ret = id32db->cursor(id32db,
 351                                 txn,
 352                                 &cursor,
 353                                 0);   /* flags */
 354
 355                 shortkeyid = keyid & 0xFFFFFFFF;
 356
 357                 memset(&key, 0, sizeof(key));
 358                 memset(&data, 0, sizeof(data));
 359                 key.data = &shortkeyid;
 360                 key.size = sizeof(shortkeyid);
 361                 data.flags = DB_DBT_MALLOC;
 362
 363                 ret = cursor->c_get(cursor,
 364                         &key,
 365                         &data,
 366                         DB_SET);
 367
 368                 if (ret == 0) {
 369                         keyid = *(uint64_t *) data.data;
 370
 371                         if (data.data != NULL) {
 372                                 free(data.data);
 373                                 data.data = NULL;
 374                         }
 375                 }
 376
 377                 ret = cursor->c_close(cursor);
 378                 cursor = NULL;
 379         }
 380
 381         return keyid;
 382 }
 383
 384 /**
 385  *      fetch_key - Given a keyid fetch the key from storage.
 386  *      @keyid: The keyid to fetch.
 387  *      @publickey: A pointer to a structure to return the key in.
 388  *      @intrans: If we're already in a transaction.
 389  *
 390  *      We use the hex representation of the keyid as the filename to fetch the
 391  *      key from. The key is stored in the file as a binary OpenPGP stream of
 392  *      packets, so we can just use read_openpgp_stream() to read the packets
 393  *      in and then parse_keys() to parse the packets into a publickey
 394  *      structure.
 395  */
 396 static int db4_fetch_key(uint64_t keyid, struct openpgp_publickey **publickey,
 397                 bool intrans)
 398 {
 399         struct openpgp_packet_list *packets = NULL;
 400         DBT key, data;
 401         int ret = 0;
 402         int numkeys = 0;
 403         struct buffer_ctx fetchbuf;
 404
 405         if (keyid < 0x100000000LL) {
 406                 keyid = db4_getfullkeyid(keyid);
 407         }
 408
 409         memset(&key, 0, sizeof(key));
 410         memset(&data, 0, sizeof(data));
 411
 412         data.size = 0;
 413         data.data = NULL;
 414
 415         key.size = sizeof(keyid);
 416         key.data = &keyid;
 417
 418         if (!intrans) {
 419                 db4_starttrans();
 420         }
 421
 422         ret = keydb(keyid)->get(keydb(keyid),
 423                         txn,
 424                         &key,
 425                         &data,
 426                         0); /* flags*/
 427
 428         if (ret == 0) {
 429                 fetchbuf.buffer = data.data;
 430                 fetchbuf.offset = 0;
 431                 fetchbuf.size = data.size;
 432                 read_openpgp_stream(buffer_fetchchar, &fetchbuf,
 433                                 &packets, 0);
 434                 parse_keys(packets, publickey);
 435                 free_packet_list(packets);
 436                 packets = NULL;
 437                 numkeys++;
 438         } else if (ret != DB_NOTFOUND) {
 439                 logthing(LOGTHING_ERROR,
 440                                 "Problem retrieving key: %s",
 441                                 db_strerror(ret));
 442         }
 443
 444         if (!intrans) {
 445                 db4_endtrans();
 446         }
 447
 448         return (numkeys);
 449 }
 450
 451 int worddb_cmp(const void *d1, const void *d2)
 452 {
 453         return memcmp(d1, d2, 12);
 454 }
 455
 456 /**
 457  *      fetch_key_text - Trys to find the keys that contain the supplied text.
 458  *      @search: The text to search for.
 459  *      @publickey: A pointer to a structure to return the key in.
 460  *
 461  *      This function searches for the supplied text and returns the keys that
 462  *      contain it.
 463  */
 464 static int db4_fetch_key_text(const char *search,
 465                 struct openpgp_publickey **publickey)
 466 {
 467         DBC *cursor = NULL;
 468         DBT key, data;
 469         int ret;
 470         uint64_t keyid;
 471         int i;
 472         int numkeys;
 473         char *searchtext = NULL;
 474         struct ll *wordlist = NULL;
 475         struct ll *curword = NULL;
 476         struct keyarray keylist = { NULL, 0, 0 };
 477         struct keyarray newkeylist = { NULL, 0, 0 };
 478
 479         numkeys = 0;
 480         searchtext = strdup(search);
 481         wordlist = makewordlist(wordlist, searchtext);
 482
 483         for (curword = wordlist; curword != NULL; curword = curword->next) {
 484                 db4_starttrans();
 485
 486                 ret = worddb->cursor(worddb,
 487                                 txn,
 488                                 &cursor,
 489                                 0);   /* flags */
 490
 491                 memset(&key, 0, sizeof(key));
 492                 memset(&data, 0, sizeof(data));
 493                 key.data = curword->object;
 494                 key.size = strlen(curword->object);
 495                 data.flags = DB_DBT_MALLOC;
 496                 ret = cursor->c_get(cursor,
 497                                 &key,
 498                                 &data,
 499                                 DB_SET);
 500                 while (ret == 0 && strncmp(key.data, curword->object,
 501                                         key.size) == 0 &&
 502                                 ((char *) curword->object)[key.size] == 0) {
 503                         keyid = 0;
 504                         for (i = 4; i < 12; i++) {
 505                                 keyid <<= 8;
 506                                 keyid += ((unsigned char *)
 507                                                 data.data)[i];
 508                         }
 509
 510                         if (keylist.count == 0 ||
 511                                         array_find(&keylist, keyid)) {
 512                                 array_add(&newkeylist, keyid);
 513                         }
 514
 515                         free(data.data);
 516                         data.data = NULL;
 517
 518                         ret = cursor->c_get(cursor,
 519                                         &key,
 520                                         &data,
 521                                         DB_NEXT);
 522                 }
 523                 array_free(&keylist);
 524                 keylist = newkeylist;
 525                 newkeylist.keys = NULL;
 526                 newkeylist.count = newkeylist.size = 0;
 527                 if (data.data != NULL) {
 528                         free(data.data);
 529                         data.data = NULL;
 530                 }
 531                 ret = cursor->c_close(cursor);
 532                 cursor = NULL;
 533                 db4_endtrans();
 534         }
 535         llfree(wordlist, NULL);
 536         wordlist = NULL;
 537
 538         db4_starttrans();
 539         for (i = 0; i < keylist.count; i++) {
 540                 numkeys += db4_fetch_key(keylist.keys[i],
 541                         publickey,
 542                         true);
 543         }
 544         array_free(&keylist);
 545         free(searchtext);
 546         searchtext = NULL;
 547
 548         db4_endtrans();
 549
 550         return (numkeys);
 551 }
 552
 553 /**
 554  *      delete_key - Given a keyid delete the key from storage.
 555  *      @keyid: The keyid to delete.
 556  *      @intrans: If we're already in a transaction.
 557  *
 558  *      This function deletes a public key from whatever storage mechanism we
 559  *      are using. Returns 0 if the key existed.
 560  */
 561 static int db4_delete_key(uint64_t keyid, bool intrans)
 562 {
 563         struct openpgp_publickey *publickey = NULL;
 564         DBT key, data;
 565         DBC *cursor = NULL;
 566         uint32_t   shortkeyid = 0;
 567         uint64_t  *subkeyids = NULL;
 568         int ret = 0;
 569         int i;
 570         char **uids = NULL;
 571         char *primary = NULL;
 572         unsigned char worddb_data[12];
 573         struct ll *wordlist = NULL;
 574         struct ll *curword  = NULL;
 575         bool deadlock = false;
 576
 577         if (!intrans) {
 578                 db4_starttrans();
 579         }
 580
 581         db4_fetch_key(keyid, &publickey, true);
 582
 583         /*
 584          * Walk through the uids removing the words from the worddb.
 585          */
 586         if (publickey != NULL) {
 587                 uids = keyuids(publickey, &primary);
 588         }
 589         if (uids != NULL) {
 590                 for (i = 0; ret == 0 && uids[i] != NULL; i++) {
 591                         wordlist = makewordlist(wordlist, uids[i]);
 592                 }
 593
 594                 ret = worddb->cursor(worddb,
 595                         txn,
 596                         &cursor,
 597                         0);   /* flags */
 598
 599                 for (curword = wordlist; curword != NULL && !deadlock;
 600                                 curword = curword->next) {
 601                         memset(&key, 0, sizeof(key));
 602                         memset(&data, 0, sizeof(data));
 603                         key.data = curword->object;
 604                         key.size = strlen(key.data);
 605                         data.data = worddb_data;
 606                         data.size = sizeof(worddb_data);
 607
 608                         /*
 609                          * Our data is the key creation time followed by the
 610                          * key id.
 611                          */
 612                         worddb_data[ 0] = publickey->publickey->data[1];
 613                         worddb_data[ 1] = publickey->publickey->data[2];
 614                         worddb_data[ 2] = publickey->publickey->data[3];
 615                         worddb_data[ 3] = publickey->publickey->data[4];
 616                         worddb_data[ 4] = (keyid >> 56) & 0xFF;
 617                         worddb_data[ 5] = (keyid >> 48) & 0xFF;
 618                         worddb_data[ 6] = (keyid >> 40) & 0xFF;
 619                         worddb_data[ 7] = (keyid >> 32) & 0xFF;
 620                         worddb_data[ 8] = (keyid >> 24) & 0xFF;
 621                         worddb_data[ 9] = (keyid >> 16) & 0xFF;
 622                         worddb_data[10] = (keyid >>  8) & 0xFF;
 623                         worddb_data[11] = keyid & 0xFF;
 624
 625                         ret = cursor->c_get(cursor,
 626                                 &key,
 627                                 &data,
 628                                 DB_GET_BOTH);
 629
 630                         if (ret == 0) {
 631                                 ret = cursor->c_del(cursor, 0);
 632                                 if (ret != 0) {
 633                                         logthing(LOGTHING_ERROR,
 634                                                 "Problem deleting word: %s",
 635                                                 db_strerror(ret));
 636                                 }
 637                         }
 638
 639                         if (ret != 0) {
 640                                 logthing(LOGTHING_ERROR,
 641                                         "Problem deleting word: %s",
 642                                         db_strerror(ret));
 643                                 if (ret == DB_LOCK_DEADLOCK) {
 644                                         deadlock = true;
 645                                 }
 646                         }
 647                 }
 648                 ret = cursor->c_close(cursor);
 649                 cursor = NULL;
 650
 651                 /*
 652                  * Free our UID and word lists.
 653                  */
 654                 llfree(wordlist, NULL);
 655                 for (i = 0; uids[i] != NULL; i++) {
 656                         free(uids[i]);
 657                         uids[i] = NULL;
 658                 }
 659                 free(uids);
 660                 uids = NULL;
 661                 free_publickey(publickey);
 662                 publickey = NULL;
 663         }
 664
 665         if (!deadlock) {
 666                 ret = id32db->cursor(id32db,
 667                         txn,
 668                         &cursor,
 669                         0);   /* flags */
 670
 671                 shortkeyid = keyid & 0xFFFFFFFF;
 672
 673                 memset(&key, 0, sizeof(key));
 674                 memset(&data, 0, sizeof(data));
 675                 key.data = &shortkeyid;
 676                 key.size = sizeof(shortkeyid);
 677                 data.data = &keyid;
 678                 data.size = sizeof(keyid);
 679
 680                 ret = cursor->c_get(cursor,
 681                         &key,
 682                         &data,
 683                         DB_GET_BOTH);
 684
 685                 if (ret == 0) {
 686                         ret = cursor->c_del(cursor, 0);
 687                         if (ret != 0) {
 688                                 logthing(LOGTHING_ERROR,
 689                                         "Problem deleting short keyid: %s",
 690                                         db_strerror(ret));
 691                         }
 692                 }
 693
 694                 if (ret != 0) {
 695                         logthing(LOGTHING_ERROR,
 696                                 "Problem deleting short keyid: %s",
 697                                 db_strerror(ret));
 698                         if (ret == DB_LOCK_DEADLOCK) {
 699                                 deadlock = true;
 700                         }
 701                 }
 702
 703                 subkeyids = keysubkeys(publickey);
 704                 i = 0;
 705                 while (subkeyids != NULL && subkeyids[i] != 0) {
 706                         shortkeyid = subkeyids[i++] & 0xFFFFFFFF;
 707
 708                         memset(&key, 0, sizeof(key));
 709                         memset(&data, 0, sizeof(data));
 710                         key.data = &shortkeyid;
 711                         key.size = sizeof(shortkeyid);
 712                         data.data = &keyid;
 713                         data.size = sizeof(keyid);
 714
 715                         ret = cursor->c_get(cursor,
 716                                 &key,
 717                                 &data,
 718                                 DB_GET_BOTH);
 719
 720                         if (ret == 0) {
 721                                 ret = cursor->c_del(cursor, 0);
 722                                 if (ret != 0) {
 723                                         logthing(LOGTHING_ERROR,
 724                                                 "Problem deleting short"
 725                                                 " keyid: %s",
 726                                                 db_strerror(ret));
 727                                 }
 728                         }
 729
 730                         if (ret != 0) {
 731                                 logthing(LOGTHING_ERROR,
 732                                         "Problem deleting short keyid: %s",
 733                                         db_strerror(ret));
 734                                 if (ret == DB_LOCK_DEADLOCK) {
 735                                         deadlock = true;
 736                                 }
 737                         }
 738                 }
 739                 if (subkeyids != NULL) {
 740                         free(subkeyids);
 741                         subkeyids = NULL;
 742                 }
 743
 744                 ret = cursor->c_close(cursor);
 745                 cursor = NULL;
 746         }
 747
 748         if (!deadlock) {
 749                 key.data = &keyid;
 750                 key.size = sizeof(keyid);
 751
 752                 keydb(keyid)->del(keydb(keyid),
 753                                 txn,
 754                                 &key,
 755                                 0); /* flags */
 756         }
 757
 758         if (!intrans) {
 759                 db4_endtrans();
 760         }
 761
 762         return deadlock ? (-1) : (ret == DB_NOTFOUND);
 763 }
 764
 765 /**
 766  *      store_key - Takes a key and stores it.
 767  *      @publickey: A pointer to the public key to store.
 768  *      @intrans: If we're already in a transaction.
 769  *      @update: If true the key exists and should be updated.
 770  *
 771  *      Again we just use the hex representation of the keyid as the filename
 772  *      to store the key to. We flatten the public key to a list of OpenPGP
 773  *      packets and then use write_openpgp_stream() to write the stream out to
 774  *      the file. If update is true then we delete the old key first, otherwise
 775  *      we trust that it doesn't exist.
 776  */
 777 static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
 778                 bool update)
 779 {
 780         struct     openpgp_packet_list *packets = NULL;
 781         struct     openpgp_packet_list *list_end = NULL;
 782         struct     openpgp_publickey *next = NULL;
 783         int        ret = 0;
 784         int        i = 0;
 785         struct     buffer_ctx storebuf;
 786         DBT        key;
 787         DBT        data;
 788         uint64_t   keyid = 0;
 789         uint32_t   shortkeyid = 0;
 790         uint64_t  *subkeyids = NULL;
 791         char     **uids = NULL;
 792         char      *primary = NULL;
 793         unsigned char worddb_data[12];
 794         struct ll *wordlist = NULL;
 795         struct ll *curword  = NULL;
 796         bool       deadlock = false;
 797
 798         keyid = get_keyid(publickey);
 799
 800         if (!intrans) {
 801                 db4_starttrans();
 802         }
 803
 804         /*
 805          * Delete the key if we already have it.
 806          *
 807          * TODO: Can we optimize this perhaps? Possibly when other data is
 808          * involved as well? I suspect this is easiest and doesn't make a lot
 809          * of difference though - the largest chunk of data is the keydata and
 810          * it definitely needs updated.
 811          */
 812         if (update) {
 813                 deadlock = (db4_delete_key(keyid, true) == -1);
 814         }
 815
 816         /*
 817          * Convert the key to a flat set of binary data.
 818          */
 819         if (!deadlock) {
 820                 next = publickey->next;
 821                 publickey->next = NULL;
 822                 flatten_publickey(publickey, &packets, &list_end);
 823                 publickey->next = next;
 824
 825                 storebuf.offset = 0;
 826                 storebuf.size = 8192;
 827                 storebuf.buffer = malloc(8192);
 828
 829                 write_openpgp_stream(buffer_putchar, &storebuf, packets);
 830
 831                 /*
 832                  * Now we have the key data store it in the DB; the keyid is
 833                  * the key.
 834                  */
 835                 memset(&key, 0, sizeof(key));
 836                 memset(&data, 0, sizeof(data));
 837                 key.data = &keyid;
 838                 key.size = sizeof(keyid);
 839                 data.size = storebuf.offset;
 840                 data.data = storebuf.buffer;
 841
 842                 ret = keydb(keyid)->put(keydb(keyid),
 843                                 txn,
 844                                 &key,
 845                                 &data,
 846                                 0); /* flags*/
 847                 if (ret != 0) {
 848                         logthing(LOGTHING_ERROR,
 849                                         "Problem storing key: %s",
 850                                         db_strerror(ret));
 851                         if (ret == DB_LOCK_DEADLOCK) {
 852                                 deadlock = true;
 853                         }
 854                 }
 855
 856                 free(storebuf.buffer);
 857                 storebuf.buffer = NULL;
 858                 storebuf.size = 0;
 859                 storebuf.offset = 0;
 860
 861                 free_packet_list(packets);
 862                 packets = NULL;
 863         }
 864
 865         /*
 866          * Walk through our uids storing the words into the db with the keyid.
 867          */
 868         if (!deadlock) {
 869                 uids = keyuids(publickey, &primary);
 870         }
 871         if (uids != NULL) {
 872                 for (i = 0; ret == 0 && uids[i] != NULL; i++) {
 873                         wordlist = makewordlist(wordlist, uids[i]);
 874                 }
 875
 876                 for (curword = wordlist; curword != NULL && !deadlock;
 877                                 curword = curword->next) {
 878                         memset(&key, 0, sizeof(key));
 879                         memset(&data, 0, sizeof(data));
 880                         key.data = curword->object;
 881                         key.size = strlen(key.data);
 882                         data.data = worddb_data;
 883                         data.size = sizeof(worddb_data);
 884
 885                         /*
 886                          * Our data is the key creation time followed by the
 887                          * key id.
 888                          */
 889                         worddb_data[ 0] = publickey->publickey->data[1];
 890                         worddb_data[ 1] = publickey->publickey->data[2];
 891                         worddb_data[ 2] = publickey->publickey->data[3];
 892                         worddb_data[ 3] = publickey->publickey->data[4];
 893                         worddb_data[ 4] = (keyid >> 56) & 0xFF;
 894                         worddb_data[ 5] = (keyid >> 48) & 0xFF;
 895                         worddb_data[ 6] = (keyid >> 40) & 0xFF;
 896                         worddb_data[ 7] = (keyid >> 32) & 0xFF;
 897                         worddb_data[ 8] = (keyid >> 24) & 0xFF;
 898                         worddb_data[ 9] = (keyid >> 16) & 0xFF;
 899                         worddb_data[10] = (keyid >>  8) & 0xFF;
 900                         worddb_data[11] = keyid & 0xFF;
 901                         ret = worddb->put(worddb,
 902                                 txn,
 903                                 &key,
 904                                 &data,
 905                                 0);
 906                         if (ret != 0) {
 907                                 logthing(LOGTHING_ERROR,
 908                                         "Problem storing word: %s",
 909                                         db_strerror(ret));
 910                                 if (ret == DB_LOCK_DEADLOCK) {
 911                                         deadlock = true;
 912                                 }
 913                         }
 914                 }
 915
 916                 /*
 917                  * Free our UID and word lists.
 918                  */
 919                 llfree(wordlist, NULL);
 920                 for (i = 0; uids[i] != NULL; i++) {
 921                         free(uids[i]);
 922                         uids[i] = NULL;
 923                 }
 924                 free(uids);
 925                 uids = NULL;
 926         }
 927
 928         /*
 929          * Write the truncated 32 bit keyid so we can lookup the full id for
 930          * queries.
 931          */
 932         if (!deadlock) {
 933                 shortkeyid = keyid & 0xFFFFFFFF;
 934
 935                 memset(&key, 0, sizeof(key));
 936                 memset(&data, 0, sizeof(data));
 937                 key.data = &shortkeyid;
 938                 key.size = sizeof(shortkeyid);
 939                 data.data = &keyid;
 940                 data.size = sizeof(keyid);
 941
 942                 ret = id32db->put(id32db,
 943                         txn,
 944                         &key,
 945                         &data,
 946                         0);
 947                 if (ret != 0) {
 948                         logthing(LOGTHING_ERROR,
 949                                 "Problem storing short keyid: %s",
 950                                 db_strerror(ret));
 951                         if (ret == DB_LOCK_DEADLOCK) {
 952                                 deadlock = true;
 953                         }
 954                 }
 955         }
 956
 957         if (!deadlock) {
 958                 subkeyids = keysubkeys(publickey);
 959                 i = 0;
 960                 while (subkeyids != NULL && subkeyids[i] != 0) {
 961                         shortkeyid = subkeyids[i++] & 0xFFFFFFFF;
 962
 963                         memset(&key, 0, sizeof(key));
 964                         memset(&data, 0, sizeof(data));
 965                         key.data = &shortkeyid;
 966                         key.size = sizeof(shortkeyid);
 967                         data.data = &keyid;
 968                         data.size = sizeof(keyid);
 969
 970                         ret = id32db->put(id32db,
 971                                 txn,
 972                                 &key,
 973                                 &data,
 974                                 0);
 975                         if (ret != 0) {
 976                                 logthing(LOGTHING_ERROR,
 977                                         "Problem storing short keyid: %s",
 978                                         db_strerror(ret));
 979                                 if (ret == DB_LOCK_DEADLOCK) {
 980                                         deadlock = true;
 981                                 }
 982                         }
 983                 }
 984                 if (subkeyids != NULL) {
 985                         free(subkeyids);
 986                         subkeyids = NULL;
 987                 }
 988         }
 989
 990         if (!intrans) {
 991                 db4_endtrans();
 992         }
 993
 994         return deadlock ? -1 : 0 ;
 995 }
 996
 997 /**
 998  *      iterate_keys - call a function once for each key in the db.
 999  *      @iterfunc: The function to call.
1000  *      @ctx: A context pointer
1001  *
1002  *      Calls iterfunc once for each key in the database. ctx is passed
1003  *      unaltered to iterfunc. This function is intended to aid database dumps
1004  *      and statistic calculations.
1005  *
1006  *      Returns the number of keys we iterated over.
1007  */
1008 static int db4_iterate_keys(void (*iterfunc)(void *ctx,
1009                 struct openpgp_publickey *key), void *ctx)
1010 {
1011         DBT                         dbkey, data;
1012         DBC                        *cursor = NULL;
1013         int                         ret = 0;
1014         int                         i = 0;
1015         int                         numkeys = 0;
1016         struct buffer_ctx           fetchbuf;
1017         struct openpgp_packet_list *packets = NULL;
1018         struct openpgp_publickey   *key = NULL;
1019
1020         for (i = 0; i < numdbs; i++) {
1021                 ret = dbconns[i]->cursor(dbconns[i],
1022                         NULL,
1023                         &cursor,
1024                         0);   /* flags */
1025
1026                 memset(&dbkey, 0, sizeof(dbkey));
1027                 memset(&data, 0, sizeof(data));
1028                 ret = cursor->c_get(cursor, &dbkey, &data, DB_NEXT);
1029                 while (ret == 0) {
1030                         fetchbuf.buffer = data.data;
1031                         fetchbuf.offset = 0;
1032                         fetchbuf.size = data.size;
1033                         read_openpgp_stream(buffer_fetchchar, &fetchbuf,
1034                                 &packets, 0);
1035                         parse_keys(packets, &key);
1036
1037                         iterfunc(ctx, key);
1038
1039                         free_publickey(key);
1040                         key = NULL;
1041                         free_packet_list(packets);
1042                         packets = NULL;
1043
1044                         memset(&dbkey, 0, sizeof(dbkey));
1045                         memset(&data, 0, sizeof(data));
1046                         ret = cursor->c_get(cursor, &dbkey, &data,
1047                                         DB_NEXT);
1048                         numkeys++;
1049                 }
1050                 if (ret != DB_NOTFOUND) {
1051                         logthing(LOGTHING_ERROR,
1052                                 "Problem reading key: %s",
1053                                 db_strerror(ret));
1054                 }
1055
1056                 ret = cursor->c_close(cursor);
1057                 cursor = NULL;
1058         }
1059
1060         return numkeys;
1061 }
1062
1063 /*
1064  * Include the basic keydb routines.
1065  */
1066 #define NEED_GETKEYSIGS 1
1067 #define NEED_KEYID2UID 1
1068 #define NEED_UPDATEKEYS 1
1069 #include "keydb.c"
1070
1071 struct dbfuncs keydb_db4_funcs = {
1072         .initdb                 = db4_initdb,
1073         .cleanupdb              = db4_cleanupdb,
1074         .starttrans             = db4_starttrans,
1075         .endtrans               = db4_endtrans,
1076         .fetch_key              = db4_fetch_key,
1077         .fetch_key_text         = db4_fetch_key_text,
1078         .store_key              = db4_store_key,
1079         .update_keys            = generic_update_keys,
1080         .delete_key             = db4_delete_key,
1081         .getkeysigs             = generic_getkeysigs,
1082         .cached_getkeysigs      = generic_cached_getkeysigs,
1083         .keyid2uid              = generic_keyid2uid,
1084         .getfullkeyid           = db4_getfullkeyid,
1085         .iterate_keys           = db4_iterate_keys,
1086 };