X-Git-Url: http://the.earth.li/gitweb/?a=blobdiff_plain;f=keydb_db4.c;h=2ffb256c4c350ea4b77e941ba4b162b3e77e9f87;hb=23f086c85c5d2db35e9ce76cf0bbf72200b4dc42;hp=4e35bff934264bb8467bed73866a19d79b269f89;hpb=5633e41c3ef6f5eb99308dd21ea0b4a3205be797;p=onak.git

diff --git a/keydb_db4.c b/keydb_db4.c
index 4e35bff..2ffb256 100644
--- a/keydb_db4.c
+++ b/keydb_db4.c
@@ -44,48 +44,24 @@
 
 #define DB4_UPGRADE_FILE "db_upgrade.lck"
 
-/**
- *	dbenv - our database environment.
- */
-static DB_ENV *dbenv = NULL;
-
-/**
- *	numdb - The number of database files we have.
- */
-static int numdbs = 16;
-
-/**
- *	dbconn - our connections to the key database files.
- */
-static DB **dbconns = NULL;
-
-/**
- *	worddb - our connection to the word database.
- */
-static DB *worddb = NULL;
-
-/**
- *	id32db - our connection to the 32bit ID database.
- */
-static DB *id32db = NULL;
-
-/**
- *	skshashdb - our connection to the SKS hash database.
- */
-static DB *skshashdb = NULL;
-
-/**
- *	txn - our current transaction id.
- */
-static DB_TXN *txn = NULL;
+struct onak_db4_dbctx {
+	DB_ENV *dbenv;	/* The database environment context */
+	int numdbs;	/* Number of data databases in use */
+	DB **dbconns;	/* Connections to the key data databases */
+	DB *worddb;	/* Connection to the word lookup database */
+	DB *id32db;	/* Connection to the 32 bit ID lookup database */
+	DB *skshashdb;	/* Connection to the SKS hash database */
+	DB *subkeydb;	/* Connection to the subkey ID lookup database */
+	DB_TXN *txn;	/* Our current transaction ID */
+};
 
-DB *keydb(uint64_t keyid)
+DB *keydb(struct onak_db4_dbctx *privctx, uint64_t keyid)
 {
 	uint64_t keytrun;
 
 	keytrun = keyid >> 8;
 
-	return(dbconns[keytrun % numdbs]);
+	return(privctx->dbconns[keytrun % privctx->numdbs]);
 }
 
 /**
@@ -117,16 +93,17 @@ static void db4_errfunc(const DB_ENV *edbenv, const char *errpfx,
  *	operations on the database to help speed it all up, or if we want
  *	something to only succeed if all relevant operations are successful.
  */
-static bool db4_starttrans(void)
+static bool db4_starttrans(struct onak_dbctx *dbctx)
 {
+	struct onak_db4_dbctx *privctx = (struct onak_db4_dbctx *) dbctx->priv;
 	int ret;
 
-	log_assert(dbenv != NULL);
-	log_assert(txn == NULL);
+	log_assert(privctx->dbenv != NULL);
+	log_assert(privctx->txn == NULL);
 
-	ret = dbenv->txn_begin(dbenv,
+	ret = privctx->dbenv->txn_begin(privctx->dbenv,
 		NULL, /* No parent transaction */
-		&txn,
+		&privctx->txn,
 		0);
 	if (ret != 0) {
 		logthing(LOGTHING_CRITICAL,
@@ -143,14 +120,15 @@ static bool db4_starttrans(void)
  *
  *	Ends a transaction.
  */
-static void db4_endtrans(void)
+static void db4_endtrans(struct onak_dbctx *dbctx)
 {
+	struct onak_db4_dbctx *privctx = (struct onak_db4_dbctx *) dbctx->priv;
 	int ret;
 
-	log_assert(dbenv != NULL);
-	log_assert(txn != NULL);
+	log_assert(privctx->dbenv != NULL);
+	log_assert(privctx->txn != NULL);
 
-	ret = txn->commit(txn,
+	ret = privctx->txn->commit(privctx->txn,
 		0);
 	if (ret != 0) {
 		logthing(LOGTHING_CRITICAL,
@@ -158,48 +136,11 @@ static void db4_endtrans(void)
 				db_strerror(ret));
 		exit(1);
 	}
-	txn = NULL;
+	privctx->txn = NULL;
 
 	return;
 }
 
-/**
- *	cleanupdb - De-initialize the key database.
- *
- *	This function should be called upon program exit to allow the DB to
- *	cleanup after itself.
- */
-static void db4_cleanupdb(void)
-{
-	int i = 0;
-
-	if (dbenv != NULL) {
-		dbenv->txn_checkpoint(dbenv, 0, 0, 0);
-		if (skshashdb != NULL) {
-			skshashdb->close(skshashdb, 0);
-			skshashdb = NULL;
-		}
-		if (id32db != NULL) {
-			id32db->close(id32db, 0);
-			id32db = NULL;
-		}
-		if (worddb != NULL) {
-			worddb->close(worddb, 0);
-			worddb = NULL;
-		}
-		for (i = 0; i < numdbs; i++) {
-			if (dbconns[i] != NULL) {
-				dbconns[i]->close(dbconns[i], 0);
-				dbconns[i] = NULL;
-			}
-		}
-		free(dbconns);
-		dbconns = NULL;
-		dbenv->close(dbenv, 0);
-		dbenv = NULL;
-	}
-}
-
 /**
  *	db4_upgradedb - Upgrade a DB4 database
  *
@@ -207,7 +148,7 @@ static void db4_cleanupdb(void)
  *	we're running with a newer version of db4 than the database was
  *	created with.
  */
-static int db4_upgradedb(int numdb)
+static int db4_upgradedb(struct onak_db4_dbctx *privctx)
 {
 	DB *curdb = NULL;
 	int ret;
@@ -234,17 +175,19 @@ static int db4_upgradedb(int numdb)
 	close(lockfile_fd);
 
 	logthing(LOGTHING_NOTICE, "Upgrading DB4 database");
-	ret = db_env_create(&dbenv, 0);
-	dbenv->set_errcall(dbenv, &db4_errfunc);
-	dbenv->remove(dbenv, config.db_dir, 0);
-	dbenv = NULL;
-	for (i = 0; i < numdb; i++) {
+	ret = db_env_create(&privctx->dbenv, 0);
+	if (ret == 0) {
+		privctx->dbenv->set_errcall(privctx->dbenv, &db4_errfunc);
+		privctx->dbenv->remove(privctx->dbenv, config.db_dir, 0);
+		privctx->dbenv = NULL;
+	}
+	for (i = 0; i < privctx->numdbs; i++) {
 		ret = db_create(&curdb, NULL, 0);
 		if (ret == 0) {
 			snprintf(buf, sizeof(buf) - 1, "%s/keydb.%d.db",
 				config.db_dir, i);
 			logthing(LOGTHING_DEBUG, "Upgrading %s", buf);
-			ret = curdb->upgrade(curdb, buf, 0);
+			curdb->upgrade(curdb, buf, 0);
 			curdb->close(curdb, 0);
 		} else {
 			logthing(LOGTHING_ERROR, "Error upgrading DB %s : %s",
@@ -257,7 +200,7 @@ static int db4_upgradedb(int numdb)
 	if (ret == 0) {
 		snprintf(buf, sizeof(buf) - 1, "%s/worddb", config.db_dir);
 		logthing(LOGTHING_DEBUG, "Upgrading %s", buf);
-		ret = curdb->upgrade(curdb, buf, 0);
+		curdb->upgrade(curdb, buf, 0);
 		curdb->close(curdb, 0);
 	} else {
 		logthing(LOGTHING_ERROR, "Error upgrading DB %s : %s",
@@ -269,7 +212,7 @@ static int db4_upgradedb(int numdb)
 	if (ret == 0) {
 		snprintf(buf, sizeof(buf) - 1, "%s/id32db", config.db_dir);
 		logthing(LOGTHING_DEBUG, "Upgrading %s", buf);
-		ret = curdb->upgrade(curdb, buf, 0);
+		curdb->upgrade(curdb, buf, 0);
 		curdb->close(curdb, 0);
 	} else {
 		logthing(LOGTHING_ERROR, "Error upgrading DB %s : %s",
@@ -281,7 +224,19 @@ static int db4_upgradedb(int numdb)
 	if (ret == 0) {
 		snprintf(buf, sizeof(buf) - 1, "%s/skshashdb", config.db_dir);
 		logthing(LOGTHING_DEBUG, "Upgrading %s", buf);
-		ret = curdb->upgrade(curdb, buf, 0);
+		curdb->upgrade(curdb, buf, 0);
+		curdb->close(curdb, 0);
+	} else {
+		logthing(LOGTHING_ERROR, "Error upgrading DB %s : %s",
+			buf,
+			db_strerror(ret));
+	}
+
+	ret = db_create(&curdb, NULL, 0);
+	if (ret == 0) {
+		snprintf(buf, sizeof(buf) - 1, "%s/subkeydb", config.db_dir);
+		logthing(LOGTHING_DEBUG, "Upgrading %s", buf);
+		curdb->upgrade(curdb, buf, 0);
 		curdb->close(curdb, 0);
 	} else {
 		logthing(LOGTHING_ERROR, "Error upgrading DB %s : %s",
@@ -297,351 +252,139 @@ static int db4_upgradedb(int numdb)
 }
 
 /**
- *	initdb - Initialize the key database.
+ *	getfullkeyid - Maps a 32bit key id to a 64bit one.
+ *	@keyid: The 32bit keyid.
  *
- *	This function should be called before any of the other functions in
- *	this file are called in order to allow the DB to be initialized ready
- *	for access.
+ *	This function maps a 32bit key id to the full 64bit one. It returns the
+ *	full keyid. If the key isn't found a keyid of 0 is returned.
  */
-static void db4_initdb(bool readonly)
+static uint64_t db4_getfullkeyid(struct onak_dbctx *dbctx, uint64_t keyid)
 {
-	char       buf[1024];
-	FILE      *numdb = NULL;
-	int        ret = 0;
-	int        i = 0;
-	uint32_t   flags = 0;
-	struct stat statbuf;
-	int        maxlocks;
-
-	snprintf(buf, sizeof(buf) - 1, "%s/%s", config.db_dir,
-			DB4_UPGRADE_FILE);
-	ret = stat(buf, &statbuf);
-	while ((ret == 0) || (errno != ENOENT)) {
-		if (ret != 0) {
-			logthing(LOGTHING_CRITICAL, "Couldn't stat upgrade "
-				"lock file: %s (%d)", strerror(errno), ret);
-			exit(1);
-		}
-		logthing(LOGTHING_DEBUG, "DB4 upgrade in progress; waiting.");
-		sleep(5);
-		ret = stat(buf, &statbuf);
-	}
-	ret = 0;
-
-	snprintf(buf, sizeof(buf) - 1, "%s/num_keydb", config.db_dir);
-	numdb = fopen(buf, "r");
-	if (numdb != NULL) {
-		if (fgets(buf, sizeof(buf), numdb) != NULL) {
-			numdbs = atoi(buf);
-		}
-		fclose(numdb);
-	} else if (!readonly) {
-		logthing(LOGTHING_ERROR, "Couldn't open num_keydb: %s",
-				strerror(errno));
-		numdb = fopen(buf, "w");
-		if (numdb != NULL) {
-			fprintf(numdb, "%d", numdbs);
-			fclose(numdb);
-		} else {
-			logthing(LOGTHING_ERROR,
-				"Couldn't write num_keydb: %s",
-				strerror(errno));
-		}
-	}
+	struct onak_db4_dbctx *privctx = (struct onak_db4_dbctx *) dbctx->priv;
+	DBT       key, data;
+	DBC      *cursor = NULL;
+	uint32_t  shortkeyid = 0;
+	int       ret = 0;
 
-	dbconns = calloc(numdbs, sizeof (DB *));
-	if (dbconns == NULL) {
-		logthing(LOGTHING_CRITICAL,
-				"Couldn't allocate memory for dbconns");
-		ret = 1;
-	}
+	if (keyid < 0x100000000LL) {
+		ret = privctx->id32db->cursor(privctx->id32db,
+				privctx->txn,
+				&cursor,
+				0);   /* flags */
 
-	if (ret == 0) {
-		ret = db_env_create(&dbenv, 0);
 		if (ret != 0) {
-			logthing(LOGTHING_CRITICAL,
-				"db_env_create: %s", db_strerror(ret));
+			return 0;
 		}
-	}
 
-	/*
-	 * Up the number of locks we're allowed at once. We base this on
-	 * the maximum number of keys we're going to return.
-	 */
-	maxlocks = config.maxkeys * 16;
-	if (maxlocks < 1000) {
-		maxlocks = 1000;
-	}
-	dbenv->set_lk_max_locks(dbenv, maxlocks);
-	dbenv->set_lk_max_objects(dbenv, maxlocks);
+		shortkeyid = keyid & 0xFFFFFFFF;
 
-	/*
-	 * Enable deadlock detection so that we don't block indefinitely on
-	 * anything. What we really want is simple 2 state locks, but I'm not
-	 * sure how to make the standard DB functions do that yet.
-	 */
-	if (ret == 0) {
-		dbenv->set_errcall(dbenv, &db4_errfunc);
-		ret = dbenv->set_lk_detect(dbenv, DB_LOCK_DEFAULT);
-		if (ret != 0) {
-			logthing(LOGTHING_CRITICAL,
-				"db_env_create: %s", db_strerror(ret));
-		}
-	}
+		memset(&key, 0, sizeof(key));
+		memset(&data, 0, sizeof(data));
+		key.data = &shortkeyid;
+		key.size = sizeof(shortkeyid);
+		data.flags = DB_DBT_MALLOC;
 
-	if (ret == 0) {
-		ret = dbenv->open(dbenv, config.db_dir,
-				DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_LOCK |
-				DB_INIT_TXN |
-				DB_CREATE,
-				0);
-#ifdef DB_VERSION_MISMATCH
-		if (ret == DB_VERSION_MISMATCH) {
-			dbenv->close(dbenv, 0);
-			dbenv = NULL;
-			ret = db4_upgradedb(numdbs);
-			if (ret == 0) {
-				ret = db_env_create(&dbenv, 0);
-			}
-			if (ret == 0) {
-				dbenv->set_errcall(dbenv, &db4_errfunc);
-				dbenv->set_lk_detect(dbenv, DB_LOCK_DEFAULT);
-				ret = dbenv->open(dbenv, config.db_dir,
-					DB_INIT_LOG | DB_INIT_MPOOL |
-					DB_INIT_LOCK | DB_INIT_TXN |
-					DB_CREATE | DB_RECOVER,
-					0);
+		ret = cursor->c_get(cursor,
+			&key,
+			&data,
+			DB_SET);
 
-				if (ret == 0) {
-					dbenv->txn_checkpoint(dbenv,
-							0,
-							0,
-							DB_FORCE);
-				}
+		if (ret == 0) {
+			keyid = *(uint64_t *) data.data;
+
+			if (data.data != NULL) {
+				free(data.data);
+				data.data = NULL;
 			}
 		}
-#endif
-		if (ret != 0) {
-			logthing(LOGTHING_CRITICAL,
-					"Error opening db environment: %s (%s)",
-					config.db_dir,
-					db_strerror(ret));
-			dbenv->close(dbenv, 0);
-			dbenv = NULL;
-		}
-	}
 
-	if (ret == 0) {
-		db4_starttrans();
+		cursor->c_close(cursor);
+		cursor = NULL;
+	}
 
-		for (i = 0; !ret && i < numdbs; i++) {
-			ret = db_create(&dbconns[i], dbenv, 0);
-			if (ret != 0) {
-				logthing(LOGTHING_CRITICAL,
-					"db_create: %s", db_strerror(ret));
-			}
+	return keyid;
+}
 
-			if (ret == 0) {
-				snprintf(buf, 1023, "keydb.%d.db", i);
-				flags = DB_CREATE;
-				if (readonly) {
-					flags = DB_RDONLY;
-				}
-				ret = dbconns[i]->open(dbconns[i],
-						txn,
-						buf,
-						"keydb",
-						DB_HASH,
-						flags,
-						0664);
-				if (ret != 0) {
-					logthing(LOGTHING_CRITICAL,
-						"Error opening key database:"
-						" %s (%s)",
-						buf,
-						db_strerror(ret));
-				}
-			}
-		}
+/**
+ *	fetch_key_id - Given a keyid fetch the key from storage.
+ *	@keyid: The keyid to fetch.
+ *	@publickey: A pointer to a structure to return the key in.
+ *	@intrans: If we're already in a transaction.
+ *
+ *	We use the hex representation of the keyid as the filename to fetch the
+ *	key from. The key is stored in the file as a binary OpenPGP stream of
+ *	packets, so we can just use read_openpgp_stream() to read the packets
+ *	in and then parse_keys() to parse the packets into a publickey
+ *	structure.
+ */
+static int db4_fetch_key_id(struct onak_dbctx *dbctx, uint64_t keyid,
+		struct openpgp_publickey **publickey,
+		bool intrans)
+{
+	struct onak_db4_dbctx *privctx = (struct onak_db4_dbctx *) dbctx->priv;
+	struct openpgp_packet_list *packets = NULL;
+	DBT key, data;
+	int ret = 0;
+	int numkeys = 0;
+	struct buffer_ctx fetchbuf;
 
+	if (keyid < 0x100000000LL) {
+		keyid = db4_getfullkeyid(dbctx, keyid);
 	}
 
-	if (ret == 0) {
-		ret = db_create(&worddb, dbenv, 0);
-		if (ret != 0) {
-			logthing(LOGTHING_CRITICAL, "db_create: %s",
-					db_strerror(ret));
-		}
-	}
+	memset(&key, 0, sizeof(key));
+	memset(&data, 0, sizeof(data));
 
-	if (ret == 0) {
-		ret = worddb->set_flags(worddb, DB_DUP);
-	}
+	data.size = 0;
+	data.data = NULL;
 
-	if (ret == 0) {
-		ret = worddb->open(worddb, txn, "worddb", "worddb", DB_BTREE,
-				flags,
-				0664);
-		if (ret != 0) {
-			logthing(LOGTHING_CRITICAL,
-					"Error opening word database: %s (%s)",
-					"worddb",
-					db_strerror(ret));
-		}
-	}
+	key.size = sizeof(keyid);
+	key.data = &keyid;
 
-	if (ret == 0) {
-		ret = db_create(&id32db, dbenv, 0);
-		if (ret != 0) {
-			logthing(LOGTHING_CRITICAL, "db_create: %s",
-					db_strerror(ret));
-		}
+	if (!intrans) {
+		db4_starttrans(dbctx);
 	}
 
-	if (ret == 0) {
-		ret = id32db->set_flags(id32db, DB_DUP);
-	}
-
-	if (ret == 0) {
-		ret = id32db->open(id32db, txn, "id32db", "id32db", DB_HASH,
-				flags,
-				0664);
-		if (ret != 0) {
-			logthing(LOGTHING_CRITICAL,
-					"Error opening id32 database: %s (%s)",
-					"id32db",
-					db_strerror(ret));
-		}
-	}
-
-	if (ret == 0) {
-		ret = db_create(&skshashdb, dbenv, 0);
-		if (ret != 0) {
-			logthing(LOGTHING_CRITICAL, "db_create: %s",
-					db_strerror(ret));
-		}
-	}
-
-	if (ret == 0) {
-		ret = skshashdb->open(skshashdb, txn, "skshashdb",
-				"skshashdb", DB_HASH,
-				flags,
-				0664);
-		if (ret != 0) {
-			logthing(LOGTHING_CRITICAL,
-				"Error opening skshash database: %s (%s)",
-				"skshashdb",
-				db_strerror(ret));
-		}
-	}
-
-	if (txn != NULL) {
-		db4_endtrans();
-	}
-
-	if (ret != 0) {
-		db4_cleanupdb();
-		logthing(LOGTHING_CRITICAL,
-				"Error opening database; exiting");
-		exit(EXIT_FAILURE);
-	}
-	
-	return;
-}
-
-/**
- *	getfullkeyid - Maps a 32bit key id to a 64bit one.
- *	@keyid: The 32bit keyid.
- *
- *	This function maps a 32bit key id to the full 64bit one. It returns the
- *	full keyid. If the key isn't found a keyid of 0 is returned.
- */
-static uint64_t db4_getfullkeyid(uint64_t keyid)
-{
-	DBT       key, data;
-	DBC      *cursor = NULL;
-	uint32_t  shortkeyid = 0;
-	int       ret = 0;
-
-	if (keyid < 0x100000000LL) {
-		ret = id32db->cursor(id32db,
-				txn,
-				&cursor,
-				0);   /* flags */
-
-		shortkeyid = keyid & 0xFFFFFFFF;
+	ret = keydb(privctx, keyid)->get(keydb(privctx, keyid),
+			privctx->txn,
+			&key,
+			&data,
+			0); /* flags*/
 
+	if (ret == DB_NOTFOUND) {
+		/* If we didn't find the key ID see if it's a subkey ID */
 		memset(&key, 0, sizeof(key));
 		memset(&data, 0, sizeof(data));
-		key.data = &shortkeyid;
-		key.size = sizeof(shortkeyid);
-		data.flags = DB_DBT_MALLOC;
+		data.size = 0;
+		data.data = NULL;
+		key.size = sizeof(keyid);
+		key.data = &keyid;
 
-		ret = cursor->c_get(cursor,
+		ret = privctx->subkeydb->get(privctx->subkeydb,
+			privctx->txn,
 			&key,
 			&data,
-			DB_SET);
+			0); /* flags*/
 
 		if (ret == 0) {
+			/* We got a subkey match; retrieve the actual key */
 			keyid = *(uint64_t *) data.data;
 
-			if (data.data != NULL) {
-				free(data.data);
-				data.data = NULL;
-			}
-		}
-
-		ret = cursor->c_close(cursor);
-		cursor = NULL;
-	}
-	
-	return keyid;
-}
-
-/**
- *	fetch_key - Given a keyid fetch the key from storage.
- *	@keyid: The keyid to fetch.
- *	@publickey: A pointer to a structure to return the key in.
- *	@intrans: If we're already in a transaction.
- *
- *	We use the hex representation of the keyid as the filename to fetch the
- *	key from. The key is stored in the file as a binary OpenPGP stream of
- *	packets, so we can just use read_openpgp_stream() to read the packets
- *	in and then parse_keys() to parse the packets into a publickey
- *	structure.
- */
-static int db4_fetch_key(uint64_t keyid, struct openpgp_publickey **publickey,
-		bool intrans)
-{
-	struct openpgp_packet_list *packets = NULL;
-	DBT key, data;
-	int ret = 0;
-	int numkeys = 0;
-	struct buffer_ctx fetchbuf;
-
-	if (keyid < 0x100000000LL) {
-		keyid = db4_getfullkeyid(keyid);
-	}
-
-	memset(&key, 0, sizeof(key));
-	memset(&data, 0, sizeof(data));
-
-	data.size = 0;
-	data.data = NULL;
-
-	key.size = sizeof(keyid);
-	key.data = &keyid;
+			memset(&key, 0, sizeof(key));
+			memset(&data, 0, sizeof(data));
+			data.size = 0;
+			data.data = NULL;
+			key.size = sizeof(keyid);
+			key.data = &keyid;
 
-	if (!intrans) {
-		db4_starttrans();
+			ret = keydb(privctx, keyid)->get(keydb(privctx, keyid),
+				privctx->txn,
+				&key,
+				&data,
+				0); /* flags*/
+		}
 	}
 
-	ret = keydb(keyid)->get(keydb(keyid),
-			txn,
-			&key,
-			&data,
-			0); /* flags*/
-	
 	if (ret == 0) {
 		fetchbuf.buffer = data.data;
 		fetchbuf.offset = 0;
@@ -659,7 +402,7 @@ static int db4_fetch_key(uint64_t keyid, struct openpgp_publickey **publickey,
 	}
 
 	if (!intrans) {
-		db4_endtrans();
+		db4_endtrans(dbctx);
 	}
 
 	return (numkeys);
@@ -678,9 +421,10 @@ int worddb_cmp(const void *d1, const void *d2)
  *	This function searches for the supplied text and returns the keys that
  *	contain it.
  */
-static int db4_fetch_key_text(const char *search,
+static int db4_fetch_key_text(struct onak_dbctx *dbctx, const char *search,
 		struct openpgp_publickey **publickey)
 {
+	struct onak_db4_dbctx *privctx = (struct onak_db4_dbctx *) dbctx->priv;
 	DBC *cursor = NULL;
 	DBT key, data;
 	int ret;
@@ -699,13 +443,18 @@ static int db4_fetch_key_text(const char *search,
 	wordlist = makewordlist(wordlist, searchtext);
 
 	for (curword = wordlist; curword != NULL; curword = curword->next) {
-		db4_starttrans();
+		db4_starttrans(dbctx);
 
-		ret = worddb->cursor(worddb,
-				txn,
+		ret = privctx->worddb->cursor(privctx->worddb,
+				privctx->txn,
 				&cursor,
 				0);   /* flags */
 
+		if (ret != 0) {
+			db4_endtrans(dbctx);
+			break;
+		}
+
 		memset(&key, 0, sizeof(key));
 		memset(&data, 0, sizeof(data));
 		key.data = curword->object;
@@ -750,10 +499,10 @@ static int db4_fetch_key_text(const char *search,
 			free(data.data);
 			data.data = NULL;
 		}
-		ret = cursor->c_close(cursor);
+		cursor->c_close(cursor);
 		cursor = NULL;
 		firstpass = 0;
-		db4_endtrans();
+		db4_endtrans(dbctx);
 	}
 	llfree(wordlist, NULL);
 	wordlist = NULL;
@@ -761,10 +510,10 @@ static int db4_fetch_key_text(const char *search,
 	if (keylist.count > config.maxkeys) {
 		keylist.count = config.maxkeys;
 	}
-	
-	db4_starttrans();
+
+	db4_starttrans(dbctx);
 	for (i = 0; i < keylist.count; i++) {
-		numkeys += db4_fetch_key(keylist.keys[i],
+		numkeys += db4_fetch_key_id(dbctx, keylist.keys[i],
 			publickey,
 			true);
 	}
@@ -772,24 +521,30 @@ static int db4_fetch_key_text(const char *search,
 	free(searchtext);
 	searchtext = NULL;
 
-	db4_endtrans();
-	
+	db4_endtrans(dbctx);
+
 	return (numkeys);
 }
 
-static int db4_fetch_key_skshash(const struct skshash *hash,
+static int db4_fetch_key_skshash(struct onak_dbctx *dbctx,
+		const struct skshash *hash,
 		struct openpgp_publickey **publickey)
 {
+	struct onak_db4_dbctx *privctx = (struct onak_db4_dbctx *) dbctx->priv;
 	DBT       key, data;
 	DBC      *cursor = NULL;
 	uint64_t  keyid = 0;
 	int       ret = 0;
 
-	ret = skshashdb->cursor(skshashdb,
-			txn,
+	ret = privctx->skshashdb->cursor(privctx->skshashdb,
+			privctx->txn,
 			&cursor,
 			0);   /* flags */
 
+	if (ret != 0) {
+		return 0;
+	}
+
 	memset(&key, 0, sizeof(key));
 	memset(&data, 0, sizeof(data));
 	key.data = (void *) hash->hash;
@@ -810,10 +565,10 @@ static int db4_fetch_key_skshash(const struct skshash *hash,
 		}
 	}
 
-	ret = cursor->c_close(cursor);
+	cursor->c_close(cursor);
 	cursor = NULL;
 
-	return db4_fetch_key(keyid, publickey, false);
+	return db4_fetch_key_id(dbctx, keyid, publickey, false);
 }
 
 /**
@@ -824,13 +579,15 @@ static int db4_fetch_key_skshash(const struct skshash *hash,
  *	This function deletes a public key from whatever storage mechanism we
  *	are using. Returns 0 if the key existed.
  */
-static int db4_delete_key(uint64_t keyid, bool intrans)
+static int db4_delete_key(struct onak_dbctx *dbctx,
+		uint64_t keyid, bool intrans)
 {
+	struct onak_db4_dbctx *privctx = (struct onak_db4_dbctx *) dbctx->priv;
 	struct openpgp_publickey *publickey = NULL;
 	DBT key, data;
 	DBC *cursor = NULL;
 	uint32_t   shortkeyid = 0;
-	uint64_t  *subkeyids = NULL;
+	struct openpgp_fingerprint *subkeyids = NULL;
 	int ret = 0;
 	int i;
 	char **uids = NULL;
@@ -840,12 +597,13 @@ static int db4_delete_key(uint64_t keyid, bool intrans)
 	struct ll *curword  = NULL;
 	bool deadlock = false;
 	struct skshash hash;
+	uint64_t subkeyid;
 
 	if (!intrans) {
-		db4_starttrans();
+		db4_starttrans(dbctx);
 	}
 
-	db4_fetch_key(keyid, &publickey, true);
+	db4_fetch_key_id(dbctx, keyid, &publickey, true);
 
 	/*
 	 * Walk through the uids removing the words from the worddb.
@@ -857,9 +615,9 @@ static int db4_delete_key(uint64_t keyid, bool intrans)
 		for (i = 0; ret == 0 && uids[i] != NULL; i++) {
 			wordlist = makewordlist(wordlist, uids[i]);
 		}
-				
-		ret = worddb->cursor(worddb,
-			txn,
+
+		privctx->worddb->cursor(privctx->worddb,
+			privctx->txn,
 			&cursor,
 			0);   /* flags */
 
@@ -909,9 +667,47 @@ static int db4_delete_key(uint64_t keyid, bool intrans)
 				}
 			}
 		}
-		ret = cursor->c_close(cursor);
+		cursor->c_close(cursor);
 		cursor = NULL;
 
+		ret = privctx->skshashdb->cursor(privctx->skshashdb,
+			privctx->txn,
+			&cursor,
+			0);   /* flags */
+		if (ret == 0) {
+			get_skshash(publickey, &hash);
+
+			memset(&key, 0, sizeof(key));
+			memset(&data, 0, sizeof(data));
+			key.data = hash.hash;
+			key.size = sizeof(hash.hash);
+			data.data = &keyid;
+			data.size = sizeof(keyid);
+
+			ret = cursor->c_get(cursor,
+				&key,
+				&data,
+				DB_GET_BOTH);
+
+			if (ret == 0) {
+				ret = cursor->c_del(cursor, 0);
+			}
+
+			if (ret != 0) {
+				logthing(LOGTHING_ERROR,
+					"Problem deleting skshash: %s "
+					"(0x%016" PRIX64 ")",
+					db_strerror(ret),
+					keyid);
+				if (ret == DB_LOCK_DEADLOCK) {
+					deadlock = true;
+				}
+			}
+
+			cursor->c_close(cursor);
+			cursor = NULL;
+		}
+
 		/*
 		 * Free our UID and word lists.
 		 */
@@ -927,8 +723,8 @@ static int db4_delete_key(uint64_t keyid, bool intrans)
 	}
 
 	if (!deadlock) {
-		ret = id32db->cursor(id32db,
-			txn,
+		privctx->id32db->cursor(privctx->id32db,
+			privctx->txn,
 			&cursor,
 			0);   /* flags */
 
@@ -952,7 +748,7 @@ static int db4_delete_key(uint64_t keyid, bool intrans)
 
 		if (ret != 0) {
 			logthing(LOGTHING_ERROR,
-				"Problem deleting short keyid: %s ",
+				"Problem deleting short keyid: %s "
 				"(0x%016" PRIX64 ")",
 				db_strerror(ret),
 				keyid);
@@ -963,8 +759,25 @@ static int db4_delete_key(uint64_t keyid, bool intrans)
 
 		subkeyids = keysubkeys(publickey);
 		i = 0;
-		while (subkeyids != NULL && subkeyids[i] != 0) {
-			shortkeyid = subkeyids[i++] & 0xFFFFFFFF;
+		while (subkeyids != NULL && subkeyids[i].length != 0) {
+			subkeyid = fingerprint2keyid(&subkeyids[i]);
+			memset(&key, 0, sizeof(key));
+			key.data = &subkeyid;
+			key.size = sizeof(subkeyid);
+			privctx->subkeydb->del(privctx->subkeydb,
+					privctx->txn, &key, 0);
+			if (ret != 0) {
+				logthing(LOGTHING_ERROR,
+					"Problem deleting subkey id: %s "
+					"(0x%016" PRIX64 ")",
+					db_strerror(ret),
+					keyid);
+				if (ret == DB_LOCK_DEADLOCK) {
+					deadlock = true;
+				}
+			}
+
+			shortkeyid = subkeyid & 0xFFFFFFFF;
 
 			memset(&key, 0, sizeof(key));
 			memset(&data, 0, sizeof(data));
@@ -984,7 +797,7 @@ static int db4_delete_key(uint64_t keyid, bool intrans)
 
 			if (ret != 0) {
 				logthing(LOGTHING_ERROR,
-					"Problem deleting short keyid: %s ",
+					"Problem deleting short keyid: %s "
 					"(0x%016" PRIX64 ")",
 					db_strerror(ret),
 					keyid);
@@ -992,51 +805,13 @@ static int db4_delete_key(uint64_t keyid, bool intrans)
 					deadlock = true;
 				}
 			}
+			i++;
 		}
 		if (subkeyids != NULL) {
 			free(subkeyids);
 			subkeyids = NULL;
 		}
-		ret = cursor->c_close(cursor);
-		cursor = NULL;
-
-	}
-
-	if (!deadlock) {
-		ret = skshashdb->cursor(skshashdb,
-			txn,
-			&cursor,
-			0);   /* flags */
-		get_skshash(publickey, &hash);
-
-		memset(&key, 0, sizeof(key));
-		memset(&data, 0, sizeof(data));
-		key.data = hash.hash;
-		key.size = sizeof(hash.hash);
-		data.data = &keyid;
-		data.size = sizeof(keyid);
-
-		ret = cursor->c_get(cursor,
-			&key,
-			&data,
-			DB_GET_BOTH);
-
-		if (ret == 0) {
-			ret = cursor->c_del(cursor, 0);
-		}
-
-		if (ret != 0) {
-			logthing(LOGTHING_ERROR,
-				"Problem deleting skshash: %s ",
-				"(0x%016" PRIX64 ")",
-				db_strerror(ret),
-				keyid);
-			if (ret == DB_LOCK_DEADLOCK) {
-				deadlock = true;
-			}
-		}
-
-		ret = cursor->c_close(cursor);
+		cursor->c_close(cursor);
 		cursor = NULL;
 	}
 
@@ -1044,14 +819,14 @@ static int db4_delete_key(uint64_t keyid, bool intrans)
 		key.data = &keyid;
 		key.size = sizeof(keyid);
 
-		keydb(keyid)->del(keydb(keyid),
-				txn,
+		keydb(privctx, keyid)->del(keydb(privctx, keyid),
+				privctx->txn,
 				&key,
 				0); /* flags */
 	}
 
 	if (!intrans) {
-		db4_endtrans();
+		db4_endtrans(dbctx);
 	}
 
 	return deadlock ? (-1) : (ret == DB_NOTFOUND);
@@ -1069,9 +844,11 @@ static int db4_delete_key(uint64_t keyid, bool intrans)
  *	the file. If update is true then we delete the old key first, otherwise
  *	we trust that it doesn't exist.
  */
-static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
+static int db4_store_key(struct onak_dbctx *dbctx,
+		struct openpgp_publickey *publickey, bool intrans,
 		bool update)
 {
+	struct onak_db4_dbctx *privctx = (struct onak_db4_dbctx *) dbctx->priv;
 	struct     openpgp_packet_list *packets = NULL;
 	struct     openpgp_packet_list *list_end = NULL;
 	struct     openpgp_publickey *next = NULL;
@@ -1082,7 +859,7 @@ static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
 	DBT        data;
 	uint64_t   keyid = 0;
 	uint32_t   shortkeyid = 0;
-	uint64_t  *subkeyids = NULL;
+	struct openpgp_fingerprint *subkeyids = NULL;
 	char     **uids = NULL;
 	char      *primary = NULL;
 	unsigned char worddb_data[12];
@@ -1090,11 +867,15 @@ static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
 	struct ll *curword  = NULL;
 	bool       deadlock = false;
 	struct skshash hash;
+	uint64_t subkeyid;
 
-	keyid = get_keyid(publickey);
+	if (get_keyid(publickey, &keyid) != ONAK_E_OK) {
+		logthing(LOGTHING_ERROR, "Couldn't find key ID for key.");
+		return 0;
+	}
 
 	if (!intrans) {
-		db4_starttrans();
+		db4_starttrans(dbctx);
 	}
 
 	/*
@@ -1106,7 +887,7 @@ static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
 	 * it definitely needs updated.
 	 */
 	if (update) {
-		deadlock = (db4_delete_key(keyid, true) == -1);
+		deadlock = (db4_delete_key(dbctx, keyid, true) == -1);
 	}
 
 	/*
@@ -1118,10 +899,10 @@ static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
 		flatten_publickey(publickey, &packets, &list_end);
 		publickey->next = next;
 
-		storebuf.offset = 0; 
+		storebuf.offset = 0;
 		storebuf.size = 8192;
 		storebuf.buffer = malloc(8192);
-	
+
 		write_openpgp_stream(buffer_putchar, &storebuf, packets);
 
 		/*
@@ -1135,8 +916,8 @@ static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
 		data.size = storebuf.offset;
 		data.data = storebuf.buffer;
 
-		ret = keydb(keyid)->put(keydb(keyid),
-				txn,
+		ret = keydb(privctx, keyid)->put(keydb(privctx, keyid),
+				privctx->txn,
 				&key,
 				&data,
 				0); /* flags*/
@@ -1152,8 +933,8 @@ static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
 		free(storebuf.buffer);
 		storebuf.buffer = NULL;
 		storebuf.size = 0;
-		storebuf.offset = 0; 
-	
+		storebuf.offset = 0;
+
 		free_packet_list(packets);
 		packets = NULL;
 	}
@@ -1193,9 +974,9 @@ static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
 			worddb_data[ 8] = (keyid >> 24) & 0xFF;
 			worddb_data[ 9] = (keyid >> 16) & 0xFF;
 			worddb_data[10] = (keyid >>  8) & 0xFF;
-			worddb_data[11] = keyid & 0xFF; 
-			ret = worddb->put(worddb,
-				txn,
+			worddb_data[11] = keyid & 0xFF;
+			ret = privctx->worddb->put(privctx->worddb,
+				privctx->txn,
 				&key,
 				&data,
 				0);
@@ -1235,8 +1016,8 @@ static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
 		data.data = &keyid;
 		data.size = sizeof(keyid);
 
-		ret = id32db->put(id32db,
-			txn,
+		ret = privctx->id32db->put(privctx->id32db,
+			privctx->txn,
 			&key,
 			&data,
 			0);
@@ -1253,8 +1034,32 @@ static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
 	if (!deadlock) {
 		subkeyids = keysubkeys(publickey);
 		i = 0;
-		while (subkeyids != NULL && subkeyids[i] != 0) {
-			shortkeyid = subkeyids[i++] & 0xFFFFFFFF;
+		while (subkeyids != NULL && subkeyids[i].length != 0) {
+			subkeyid = fingerprint2keyid(&subkeyids[i]);
+			/* Store the subkey ID -> main key ID mapping */
+			memset(&key, 0, sizeof(key));
+			memset(&data, 0, sizeof(data));
+			key.data = &subkeyid;
+			key.size = sizeof(subkeyid);
+			data.data = &keyid;
+			data.size = sizeof(keyid);
+
+			ret = privctx->subkeydb->put(privctx->subkeydb,
+				privctx->txn,
+				&key,
+				&data,
+				0);
+			if (ret != 0) {
+				logthing(LOGTHING_ERROR,
+					"Problem storing subkey keyid: %s",
+					db_strerror(ret));
+				if (ret == DB_LOCK_DEADLOCK) {
+					deadlock = true;
+				}
+			}
+
+			/* Store the short subkey ID -> main key ID mapping */
+			shortkeyid = subkeyid & 0xFFFFFFFF;
 
 			memset(&key, 0, sizeof(key));
 			memset(&data, 0, sizeof(data));
@@ -1263,8 +1068,8 @@ static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
 			data.data = &keyid;
 			data.size = sizeof(keyid);
 
-			ret = id32db->put(id32db,
-				txn,
+			ret = privctx->id32db->put(privctx->id32db,
+				privctx->txn,
 				&key,
 				&data,
 				0);
@@ -1276,6 +1081,7 @@ static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
 					deadlock = true;
 				}
 			}
+			i++;
 		}
 		if (subkeyids != NULL) {
 			free(subkeyids);
@@ -1292,8 +1098,8 @@ static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
 		data.data = &keyid;
 		data.size = sizeof(keyid);
 
-		ret = skshashdb->put(skshashdb,
-			txn,
+		ret = privctx->skshashdb->put(privctx->skshashdb,
+			privctx->txn,
 			&key,
 			&data,
 			0);
@@ -1308,7 +1114,7 @@ static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
 	}
 
 	if (!intrans) {
-		db4_endtrans();
+		db4_endtrans(dbctx);
 	}
 
 	return deadlock ? -1 : 0 ;
@@ -1325,9 +1131,11 @@ static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
  *
  *	Returns the number of keys we iterated over.
  */
-static int db4_iterate_keys(void (*iterfunc)(void *ctx,
-		struct openpgp_publickey *key),	void *ctx)
+static int db4_iterate_keys(struct onak_dbctx *dbctx,
+		void (*iterfunc)(void *ctx, struct openpgp_publickey *key),
+		void *ctx)
 {
+	struct onak_db4_dbctx *privctx = (struct onak_db4_dbctx *) dbctx->priv;
 	DBT                         dbkey, data;
 	DBC                        *cursor = NULL;
 	int                         ret = 0;
@@ -1337,12 +1145,16 @@ static int db4_iterate_keys(void (*iterfunc)(void *ctx,
 	struct openpgp_packet_list *packets = NULL;
 	struct openpgp_publickey   *key = NULL;
 
-	for (i = 0; i < numdbs; i++) {
-		ret = dbconns[i]->cursor(dbconns[i],
+	for (i = 0; i < privctx->numdbs; i++) {
+		ret = privctx->dbconns[i]->cursor(privctx->dbconns[i],
 			NULL,
 			&cursor,
 			0);   /* flags */
 
+		if (ret != 0) {
+			continue;
+		}
+
 		memset(&dbkey, 0, sizeof(dbkey));
 		memset(&data, 0, sizeof(data));
 		ret = cursor->c_get(cursor, &dbkey, &data, DB_NEXT);
@@ -1355,12 +1167,12 @@ static int db4_iterate_keys(void (*iterfunc)(void *ctx,
 			parse_keys(packets, &key);
 
 			iterfunc(ctx, key);
-			
+
 			free_publickey(key);
 			key = NULL;
 			free_packet_list(packets);
 			packets = NULL;
-			
+
 			memset(&dbkey, 0, sizeof(dbkey));
 			memset(&data, 0, sizeof(data));
 			ret = cursor->c_get(cursor, &dbkey, &data,
@@ -1373,10 +1185,10 @@ static int db4_iterate_keys(void (*iterfunc)(void *ctx,
 				db_strerror(ret));
 		}
 
-		ret = cursor->c_close(cursor);
+		cursor->c_close(cursor);
 		cursor = NULL;
 	}
-	
+
 	return numkeys;
 }
 
@@ -1386,22 +1198,368 @@ static int db4_iterate_keys(void (*iterfunc)(void *ctx,
 #define NEED_GETKEYSIGS 1
 #define NEED_KEYID2UID 1
 #define NEED_UPDATEKEYS 1
+#define NEED_GET_FP 1
 #include "keydb.c"
 
-struct dbfuncs keydb_db4_funcs = {
-	.initdb			= db4_initdb,
-	.cleanupdb		= db4_cleanupdb,
-	.starttrans		= db4_starttrans,
-	.endtrans		= db4_endtrans,
-	.fetch_key		= db4_fetch_key,
-	.fetch_key_text		= db4_fetch_key_text,
-	.fetch_key_skshash	= db4_fetch_key_skshash,
-	.store_key		= db4_store_key,
-	.update_keys		= generic_update_keys,
-	.delete_key		= db4_delete_key,
-	.getkeysigs		= generic_getkeysigs,
-	.cached_getkeysigs	= generic_cached_getkeysigs,
-	.keyid2uid		= generic_keyid2uid,
-	.getfullkeyid		= db4_getfullkeyid,
-	.iterate_keys		= db4_iterate_keys,
-};
+/**
+ *	cleanupdb - De-initialize the key database.
+ *
+ *	This function should be called upon program exit to allow the DB to
+ *	cleanup after itself.
+ */
+static void db4_cleanupdb(struct onak_dbctx *dbctx)
+{
+	struct onak_db4_dbctx *privctx = (struct onak_db4_dbctx *) dbctx->priv;
+	int i = 0;
+
+	if (privctx->dbenv != NULL) {
+		privctx->dbenv->txn_checkpoint(privctx->dbenv, 0, 0, 0);
+		if (privctx->subkeydb != NULL) {
+			privctx->subkeydb->close(privctx->subkeydb, 0);
+			privctx->subkeydb = NULL;
+		}
+		if (privctx->skshashdb != NULL) {
+			privctx->skshashdb->close(privctx->skshashdb, 0);
+			privctx->skshashdb = NULL;
+		}
+		if (privctx->id32db != NULL) {
+			privctx->id32db->close(privctx->id32db, 0);
+			privctx->id32db = NULL;
+		}
+		if (privctx->worddb != NULL) {
+			privctx->worddb->close(privctx->worddb, 0);
+			privctx->worddb = NULL;
+		}
+		for (i = 0; i < privctx->numdbs; i++) {
+			if (privctx->dbconns[i] != NULL) {
+				privctx->dbconns[i]->close(privctx->dbconns[i],
+						0);
+				privctx->dbconns[i] = NULL;
+			}
+		}
+		free(privctx->dbconns);
+		privctx->dbconns = NULL;
+		privctx->dbenv->close(privctx->dbenv, 0);
+		privctx->dbenv = NULL;
+	}
+
+	free(privctx);
+	dbctx->priv = NULL;
+	free(dbctx);
+}
+
+/**
+ *	initdb - Initialize the key database.
+ *
+ *	This function should be called before any of the other functions in
+ *	this file are called in order to allow the DB to be initialized ready
+ *	for access.
+ */
+struct onak_dbctx *keydb_db4_init(bool readonly)
+{
+	char       buf[1024];
+	FILE      *numdb = NULL;
+	int        ret = 0;
+	int        i = 0;
+	uint32_t   flags = 0;
+	struct stat statbuf;
+	int        maxlocks;
+	struct onak_dbctx *dbctx;
+	struct onak_db4_dbctx *privctx;
+
+	dbctx = malloc(sizeof(*dbctx));
+	if (dbctx == NULL) {
+		return NULL;
+	}
+	dbctx->priv = privctx = calloc(1, sizeof(*privctx));
+	if (privctx == NULL) {
+		free(dbctx);
+		return NULL;
+	}
+
+	/* Default to 16 key data DBs */
+	privctx->numdbs = 16;
+
+	snprintf(buf, sizeof(buf) - 1, "%s/%s", config.db_dir,
+			DB4_UPGRADE_FILE);
+	ret = stat(buf, &statbuf);
+	while ((ret == 0) || (errno != ENOENT)) {
+		if (ret != 0) {
+			logthing(LOGTHING_CRITICAL, "Couldn't stat upgrade "
+				"lock file: %s (%d)", strerror(errno), ret);
+			exit(1);
+		}
+		logthing(LOGTHING_DEBUG, "DB4 upgrade in progress; waiting.");
+		sleep(5);
+		ret = stat(buf, &statbuf);
+	}
+	ret = 0;
+
+	snprintf(buf, sizeof(buf) - 1, "%s/num_keydb", config.db_dir);
+	numdb = fopen(buf, "r");
+	if (numdb != NULL) {
+		if (fgets(buf, sizeof(buf), numdb) != NULL) {
+			privctx->numdbs = atoi(buf);
+		}
+		fclose(numdb);
+	} else if (!readonly) {
+		logthing(LOGTHING_ERROR, "Couldn't open num_keydb: %s",
+				strerror(errno));
+		numdb = fopen(buf, "w");
+		if (numdb != NULL) {
+			fprintf(numdb, "%d", privctx->numdbs);
+			fclose(numdb);
+		} else {
+			logthing(LOGTHING_ERROR,
+				"Couldn't write num_keydb: %s",
+				strerror(errno));
+		}
+	}
+
+	privctx->dbconns = calloc(privctx->numdbs, sizeof (DB *));
+	if (privctx->dbconns == NULL) {
+		logthing(LOGTHING_CRITICAL,
+				"Couldn't allocate memory for dbconns");
+		ret = 1;
+	}
+
+	if (ret == 0) {
+		ret = db_env_create(&privctx->dbenv, 0);
+		if (ret != 0) {
+			logthing(LOGTHING_CRITICAL,
+				"db_env_create: %s", db_strerror(ret));
+		}
+	}
+
+	/*
+	 * Up the number of locks we're allowed at once. We base this on
+	 * the maximum number of keys we're going to return.
+	 */
+	maxlocks = config.maxkeys * 16;
+	if (maxlocks < 1000) {
+		maxlocks = 1000;
+	}
+	privctx->dbenv->set_lk_max_locks(privctx->dbenv, maxlocks);
+	privctx->dbenv->set_lk_max_objects(privctx->dbenv, maxlocks);
+
+	/*
+	 * Enable deadlock detection so that we don't block indefinitely on
+	 * anything. What we really want is simple 2 state locks, but I'm not
+	 * sure how to make the standard DB functions do that yet.
+	 */
+	if (ret == 0) {
+		privctx->dbenv->set_errcall(privctx->dbenv, &db4_errfunc);
+		ret = privctx->dbenv->set_lk_detect(privctx->dbenv, DB_LOCK_DEFAULT);
+		if (ret != 0) {
+			logthing(LOGTHING_CRITICAL,
+				"db_env_create: %s", db_strerror(ret));
+		}
+	}
+
+	if (ret == 0) {
+		ret = privctx->dbenv->open(privctx->dbenv, config.db_dir,
+				DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_LOCK |
+				DB_INIT_TXN |
+				DB_CREATE,
+				0);
+#ifdef DB_VERSION_MISMATCH
+		if (ret == DB_VERSION_MISMATCH) {
+			privctx->dbenv->close(privctx->dbenv, 0);
+			privctx->dbenv = NULL;
+			ret = db4_upgradedb(privctx);
+			if (ret == 0) {
+				ret = db_env_create(&privctx->dbenv, 0);
+			}
+			if (ret == 0) {
+				privctx->dbenv->set_errcall(privctx->dbenv,
+					&db4_errfunc);
+				privctx->dbenv->set_lk_detect(privctx->dbenv,
+					DB_LOCK_DEFAULT);
+				ret = privctx->dbenv->open(privctx->dbenv,
+					config.db_dir,
+					DB_INIT_LOG | DB_INIT_MPOOL |
+					DB_INIT_LOCK | DB_INIT_TXN |
+					DB_CREATE | DB_RECOVER,
+					0);
+
+				if (ret == 0) {
+					privctx->dbenv->txn_checkpoint(
+							privctx->dbenv,
+							0,
+							0,
+							DB_FORCE);
+				}
+			}
+		}
+#endif
+		if (ret != 0) {
+			logthing(LOGTHING_CRITICAL,
+					"Error opening db environment: %s (%s)",
+					config.db_dir,
+					db_strerror(ret));
+			if (privctx->dbenv != NULL) {
+				privctx->dbenv->close(privctx->dbenv, 0);
+				privctx->dbenv = NULL;
+			}
+		}
+	}
+
+	if (ret == 0) {
+		db4_starttrans(dbctx);
+
+		for (i = 0; !ret && i < privctx->numdbs; i++) {
+			ret = db_create(&privctx->dbconns[i],
+					privctx->dbenv, 0);
+			if (ret != 0) {
+				logthing(LOGTHING_CRITICAL,
+					"db_create: %s", db_strerror(ret));
+			}
+
+			if (ret == 0) {
+				snprintf(buf, 1023, "keydb.%d.db", i);
+				flags = DB_CREATE;
+				if (readonly) {
+					flags = DB_RDONLY;
+				}
+				ret = privctx->dbconns[i]->open(
+						privctx->dbconns[i],
+						privctx->txn,
+						buf,
+						"keydb",
+						DB_HASH,
+						flags,
+						0664);
+				if (ret != 0) {
+					logthing(LOGTHING_CRITICAL,
+						"Error opening key database:"
+						" %s (%s)",
+						buf,
+						db_strerror(ret));
+				}
+			}
+		}
+	}
+
+	if (ret == 0) {
+		ret = db_create(&privctx->worddb, privctx->dbenv, 0);
+		if (ret != 0) {
+			logthing(LOGTHING_CRITICAL, "db_create: %s",
+					db_strerror(ret));
+		}
+	}
+
+	if (ret == 0) {
+		ret = privctx->worddb->set_flags(privctx->worddb, DB_DUP);
+	}
+
+	if (ret == 0) {
+		ret = privctx->worddb->open(privctx->worddb, privctx->txn,
+				"worddb", "worddb", DB_BTREE,
+				flags,
+				0664);
+		if (ret != 0) {
+			logthing(LOGTHING_CRITICAL,
+					"Error opening word database: %s (%s)",
+					"worddb",
+					db_strerror(ret));
+		}
+	}
+
+	if (ret == 0) {
+		ret = db_create(&privctx->id32db, privctx->dbenv, 0);
+		if (ret != 0) {
+			logthing(LOGTHING_CRITICAL, "db_create: %s",
+					db_strerror(ret));
+		}
+	}
+
+	if (ret == 0) {
+		ret = privctx->id32db->set_flags(privctx->id32db, DB_DUP);
+	}
+
+	if (ret == 0) {
+		ret = privctx->id32db->open(privctx->id32db, privctx->txn,
+				"id32db", "id32db", DB_HASH,
+				flags,
+				0664);
+		if (ret != 0) {
+			logthing(LOGTHING_CRITICAL,
+					"Error opening id32 database: %s (%s)",
+					"id32db",
+					db_strerror(ret));
+		}
+	}
+
+	if (ret == 0) {
+		ret = db_create(&privctx->skshashdb, privctx->dbenv, 0);
+		if (ret != 0) {
+			logthing(LOGTHING_CRITICAL, "db_create: %s",
+					db_strerror(ret));
+		}
+	}
+
+	if (ret == 0) {
+		ret = privctx->skshashdb->open(privctx->skshashdb, privctx->txn,
+				"skshashdb",
+				"skshashdb", DB_HASH,
+				flags,
+				0664);
+		if (ret != 0) {
+			logthing(LOGTHING_CRITICAL,
+				"Error opening skshash database: %s (%s)",
+				"skshashdb",
+				db_strerror(ret));
+		}
+	}
+
+	if (ret == 0) {
+		ret = db_create(&privctx->subkeydb, privctx->dbenv, 0);
+		if (ret != 0) {
+			logthing(LOGTHING_CRITICAL, "db_create: %s",
+					db_strerror(ret));
+		}
+	}
+
+	if (ret == 0) {
+		ret = privctx->subkeydb->open(privctx->subkeydb, privctx->txn,
+				"subkeydb", "subkeydb",
+				DB_HASH,
+				flags,
+				0664);
+		if (ret != 0) {
+			logthing(LOGTHING_CRITICAL,
+				"Error opening subkey database: %s (%s)",
+				"subkeydb",
+				db_strerror(ret));
+		}
+	}
+
+	if (privctx->txn != NULL) {
+		db4_endtrans(dbctx);
+	}
+
+	if (ret != 0) {
+		db4_cleanupdb(dbctx);
+		logthing(LOGTHING_CRITICAL,
+				"Error opening database; exiting");
+		exit(EXIT_FAILURE);
+	}
+
+	dbctx->cleanupdb		= db4_cleanupdb;
+	dbctx->starttrans		= db4_starttrans;
+	dbctx->endtrans			= db4_endtrans;
+	dbctx->fetch_key_id		= db4_fetch_key_id;
+	dbctx->fetch_key_fp		= generic_fetch_key_fp;
+	dbctx->fetch_key_text		= db4_fetch_key_text;
+	dbctx->fetch_key_skshash	= db4_fetch_key_skshash;
+	dbctx->store_key		= db4_store_key;
+	dbctx->update_keys		= generic_update_keys;
+	dbctx->delete_key		= db4_delete_key;
+	dbctx->getkeysigs		= generic_getkeysigs;
+	dbctx->cached_getkeysigs	= generic_cached_getkeysigs;
+	dbctx->keyid2uid		= generic_keyid2uid;
+	dbctx->getfullkeyid		= db4_getfullkeyid;
+	dbctx->iterate_keys		= db4_iterate_keys;
+
+	return dbctx;
+}