]> git.sommitrealweird.co.uk Git - onak.git/blobdiff - keydb_db4.c
(Hopefully) really fix the DB4 backend issues.
[onak.git] / keydb_db4.c
index 0163ed53ea5bfdfb9cfb72c6e8a0b50d0cf7d6ca..b443942aea33530a8db6c97001896dcccd226075 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * keydb_db4.c - Routines to store and fetch keys in a DB3 database.
+ * keydb_db4.c - Routines to store and fetch keys in a DB4 database.
  *
  * Jonathan McDowell <noodles@earth.li>
  *
@@ -19,6 +19,7 @@
 #include <db.h>
 
 #include "charfuncs.h"
+#include "keyarray.h"
 #include "keydb.h"
 #include "keyid.h"
 #include "decodekey.h"
@@ -68,6 +69,92 @@ DB *keydb(uint64_t keyid)
        return(dbconns[keytrun % numdbs]);
 }
 
+/**
+ *     starttrans - Start a transaction.
+ *
+ *     Start a transaction. Intended to be used if we're about to perform many
+ *     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)
+{
+       int ret;
+
+       log_assert(dbenv != NULL);
+       log_assert(txn == NULL);
+
+       ret = dbenv->txn_begin(dbenv,
+               NULL, /* No parent transaction */
+               &txn,
+               0);
+       if (ret != 0) {
+               logthing(LOGTHING_CRITICAL,
+                               "Error starting transaction: %s",
+                               db_strerror(ret));
+               exit(1);
+       }
+
+       return true;
+}
+
+/**
+ *     endtrans - End a transaction.
+ *
+ *     Ends a transaction.
+ */
+static void db4_endtrans(void)
+{
+       int ret;
+
+       log_assert(dbenv != NULL);
+       log_assert(txn != NULL);
+
+       ret = txn->commit(txn,
+               0);
+       if (ret != 0) {
+               logthing(LOGTHING_CRITICAL,
+                               "Error ending transaction: %s",
+                               db_strerror(ret));
+               exit(1);
+       }
+       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 (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;
+       }
+}
+
 /**
  *     initdb - Initialize the key database.
  *
@@ -75,7 +162,7 @@ DB *keydb(uint64_t keyid)
  *     this file are called in order to allow the DB to be initialized ready
  *     for access.
  */
-void initdb(bool readonly)
+static void db4_initdb(bool readonly)
 {
        char       buf[1024];
        FILE      *numdb = NULL;
@@ -108,14 +195,15 @@ void initdb(bool readonly)
        if (dbconns == NULL) {
                logthing(LOGTHING_CRITICAL,
                                "Couldn't allocate memory for dbconns");
-               exit(1);
+               ret = 1;
        }
 
-       ret = db_env_create(&dbenv, 0);
-       if (ret != 0) {
-               logthing(LOGTHING_CRITICAL,
-                       "db_env_create: %s", db_strerror(ret));
-               exit(1);
+       if (ret == 0) {
+               ret = db_env_create(&dbenv, 0);
+               if (ret != 0) {
+                       logthing(LOGTHING_CRITICAL,
+                               "db_env_create: %s", db_strerror(ret));
+               }
        }
 
        /*
@@ -123,178 +211,124 @@ void initdb(bool readonly)
         * 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.
         */
-       ret = dbenv->set_lk_detect(dbenv, DB_LOCK_DEFAULT);
-       if (ret != 0) {
-               logthing(LOGTHING_CRITICAL,
-                       "db_env_create: %s", db_strerror(ret));
-               exit(1);
-       }
-
-       ret = dbenv->open(dbenv, config.db_dir,
-                       DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_LOCK |
-                       DB_INIT_TXN |
-                       DB_CREATE,
-                       0);
-       if (ret != 0) {
-               logthing(LOGTHING_CRITICAL,
-                               "Error opening db environment: %s (%s)",
-                               config.db_dir,
-                               db_strerror(ret));
-               exit(1);
-       }
-
-       starttrans();
-
-       for (i = 0; i < numdbs; i++) {
-               ret = db_create(&dbconns[i], dbenv, 0);
+       if (ret == 0) {
+               ret = dbenv->set_lk_detect(dbenv, DB_LOCK_DEFAULT);
                if (ret != 0) {
                        logthing(LOGTHING_CRITICAL,
-                               "db_create: %s", db_strerror(ret));
-                       exit(1);
+                               "db_env_create: %s", db_strerror(ret));
                }
+       }
 
-               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) {
+               ret = dbenv->open(dbenv, config.db_dir,
+                               DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_LOCK |
+                               DB_INIT_TXN |
+                               DB_CREATE,
+                               0);
                if (ret != 0) {
                        logthing(LOGTHING_CRITICAL,
-                               "Error opening key database: %s (%s)",
-                               buf,
-                               db_strerror(ret));
-                       exit(1);
+                                       "Error opening db environment: %s (%s)",
+                                       config.db_dir,
+                                       db_strerror(ret));
+                       dbenv->close(dbenv, 0);
+                       dbenv = NULL;
                }
        }
 
-       ret = db_create(&worddb, dbenv, 0);
-       if (ret != 0) {
-               logthing(LOGTHING_CRITICAL, "db_create: %s", db_strerror(ret));
-               exit(1);
-       }
-       ret = worddb->set_flags(worddb, DB_DUP);
+       if (ret == 0) {
+               db4_starttrans();
 
-       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));
-               exit(1);
-       }
+               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));
+                       }
 
-       ret = db_create(&id32db, dbenv, 0);
-       if (ret != 0) {
-               logthing(LOGTHING_CRITICAL, "db_create: %s", db_strerror(ret));
-               exit(1);
-       }
-       ret = id32db->set_flags(id32db, DB_DUP);
+                       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));
+                               }
+                       }
+               }
 
-       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));
-               exit(1);
        }
-       endtrans();
-       
-       return;
-}
 
-/**
- *     cleanupdb - De-initialize the key database.
- *
- *     This function should be called upon program exit to allow the DB to
- *     cleanup after itself.
- */
-void cleanupdb(void)
-{
-       int i = 0;
-
-       if (dbenv != NULL) {
-               dbenv->txn_checkpoint(dbenv, 0, 0, 0);
-               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;
-                       }
+       if (ret == 0) {
+               ret = db_create(&worddb, dbenv, 0);
+               if (ret != 0) {
+                       logthing(LOGTHING_CRITICAL, "db_create: %s",
+                                       db_strerror(ret));
                }
-               dbenv->close(dbenv, 0);
-               dbenv = NULL;
        }
-}
 
-/**
- *     starttrans - Start a transaction.
- *
- *     Start a transaction. Intended to be used if we're about to perform many
- *     operations on the database to help speed it all up, or if we want
- *     something to only succeed if all relevant operations are successful.
- */
-bool starttrans(void)
-{
-       int ret;
+       if (ret == 0) {
+               ret = worddb->set_flags(worddb, DB_DUP);
+       }
 
-       log_assert(dbenv != NULL);
-       log_assert(txn == 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));
+               }
+       }
 
-       ret = dbenv->txn_begin(dbenv,
-               NULL, /* No parent transaction */
-               &txn,
-               0);
-       if (ret != 0) {
-               logthing(LOGTHING_CRITICAL,
-                               "Error starting transaction: %s",
-                               db_strerror(ret));
-               exit(1);
+       if (ret == 0) {
+               ret = db_create(&id32db, dbenv, 0);
+               if (ret != 0) {
+                       logthing(LOGTHING_CRITICAL, "db_create: %s",
+                                       db_strerror(ret));
+               }
        }
 
-       return true;
-}
+       if (ret == 0) {
+               ret = id32db->set_flags(id32db, DB_DUP);
+       }
 
-/**
- *     endtrans - End a transaction.
- *
- *     Ends a transaction.
- */
-void endtrans(void)
-{
-       int ret;
+       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));
+               }
+       }
 
-       log_assert(dbenv != NULL);
-       log_assert(txn != NULL);
+       if (txn != NULL) {
+               db4_endtrans();
+       }
 
-       ret = txn->commit(txn,
-               0);
        if (ret != 0) {
+               db4_cleanupdb();
                logthing(LOGTHING_CRITICAL,
-                               "Error ending transaction: %s",
-                               db_strerror(ret));
-               exit(1);
+                               "Error opening database; exiting");
+               exit(EXIT_FAILURE);
        }
-       txn = NULL;
-
+       
        return;
 }
 
@@ -310,7 +344,7 @@ void endtrans(void)
  *     in and then parse_keys() to parse the packets into a publickey
  *     structure.
  */
-int fetch_key(uint64_t keyid, struct openpgp_publickey **publickey,
+static int db4_fetch_key(uint64_t keyid, struct openpgp_publickey **publickey,
                bool intrans)
 {
        struct openpgp_packet_list *packets = NULL;
@@ -333,7 +367,7 @@ int fetch_key(uint64_t keyid, struct openpgp_publickey **publickey,
        key.data = &keyid;
 
        if (!intrans) {
-               starttrans();
+               db4_starttrans();
        }
 
        ret = keydb(keyid)->get(keydb(keyid),
@@ -359,7 +393,7 @@ int fetch_key(uint64_t keyid, struct openpgp_publickey **publickey,
        }
 
        if (!intrans) {
-               endtrans();
+               db4_endtrans();
        }
 
        return (numkeys);
@@ -378,7 +412,8 @@ int worddb_cmp(const void *d1, const void *d2)
  *     This function searches for the supplied text and returns the keys that
  *     contain it.
  */
-int fetch_key_text(const char *search, struct openpgp_publickey **publickey)
+static int db4_fetch_key_text(const char *search,
+               struct openpgp_publickey **publickey)
 {
        DBC *cursor = NULL;
        DBT key, data;
@@ -389,21 +424,21 @@ int fetch_key_text(const char *search, struct openpgp_publickey **publickey)
        char *searchtext = NULL;
        struct ll *wordlist = NULL;
        struct ll *curword = NULL;
-       struct ll *keylist = NULL;
-       struct ll *newkeylist = NULL;
+       struct keyarray keylist = { NULL, 0, 0 };
+       struct keyarray newkeylist = { NULL, 0, 0 };
 
        numkeys = 0;
        searchtext = strdup(search);
        wordlist = makewordlist(wordlist, searchtext);
 
-       starttrans();
+       for (curword = wordlist; curword != NULL; curword = curword->next) {
+               db4_starttrans();
 
-       ret = worddb->cursor(worddb,
-                       txn,
-                       &cursor,
-                       0);   /* flags */
+               ret = worddb->cursor(worddb,
+                               txn,
+                               &cursor,
+                               0);   /* flags */
 
-       for (curword = wordlist; curword != NULL; curword = curword->next) {
                memset(&key, 0, sizeof(key));
                memset(&data, 0, sizeof(data));
                key.data = curword->object;
@@ -423,57 +458,259 @@ int fetch_key_text(const char *search, struct openpgp_publickey **publickey)
                                                data.data)[i];
                        }
 
-                       if (keylist == NULL ||
-                                       llfind(keylist, data.data,
-                                               worddb_cmp) != NULL) {
-                               newkeylist = lladd(newkeylist, data.data);
-                               data.data = NULL;
-                       } else {
-                               free(data.data);
-                               data.data = NULL;
+                       if (keylist.count == 0 ||
+                                       array_find(&keylist, keyid)) {
+                               array_add(&newkeylist, keyid);
                        }
+
+                       free(data.data);
+                       data.data = NULL;
+
                        ret = cursor->c_get(cursor,
                                        &key,
                                        &data,
                                        DB_NEXT);
                }
-               llfree(keylist, free);
-               keylist = newkeylist;
-               newkeylist = NULL;
-               if (data.data != NULL) {
-                       free(data.data);
-                       data.data = NULL;
+               array_free(&keylist);
+               keylist = newkeylist;
+               newkeylist.keys = NULL;
+               newkeylist.count = newkeylist.size = 0;
+               if (data.data != NULL) {
+                       free(data.data);
+                       data.data = NULL;
+               }
+               ret = cursor->c_close(cursor);
+               cursor = NULL;
+               db4_endtrans();
+       }
+       llfree(wordlist, NULL);
+       wordlist = NULL;
+       
+       db4_starttrans();
+       for (i = 0; i < keylist.count; i++) {
+               numkeys += db4_fetch_key(keylist.keys[i],
+                       publickey,
+                       true);
+       }
+       array_free(&keylist);
+       free(searchtext);
+       searchtext = NULL;
+
+       db4_endtrans();
+       
+       return (numkeys);
+}
+
+/**
+ *     delete_key - Given a keyid delete the key from storage.
+ *     @keyid: The keyid to delete.
+ *     @intrans: If we're already in a transaction.
+ *
+ *     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)
+{
+       struct openpgp_publickey *publickey = NULL;
+       DBT key, data;
+       DBC *cursor = NULL;
+       uint32_t   shortkeyid = 0;
+       uint64_t  *subkeyids = NULL;
+       int ret = 0;
+       int i;
+       char **uids = NULL;
+       char *primary = NULL;
+       unsigned char worddb_data[12];
+       struct ll *wordlist = NULL;
+       struct ll *curword  = NULL;
+       bool deadlock = false;
+
+       if (!intrans) {
+               db4_starttrans();
+       }
+
+       db4_fetch_key(keyid, &publickey, true);
+
+       /*
+        * Walk through the uids removing the words from the worddb.
+        */
+       if (publickey != NULL) {
+               uids = keyuids(publickey, &primary);
+       }
+       if (uids != NULL) {
+               for (i = 0; ret == 0 && uids[i] != NULL; i++) {
+                       wordlist = makewordlist(wordlist, uids[i]);
+               }
+                               
+               ret = worddb->cursor(worddb,
+                       txn,
+                       &cursor,
+                       0);   /* flags */
+
+               for (curword = wordlist; curword != NULL && !deadlock;
+                               curword = curword->next) {
+                       memset(&key, 0, sizeof(key));
+                       memset(&data, 0, sizeof(data));
+                       key.data = curword->object;
+                       key.size = strlen(key.data);
+                       data.data = worddb_data;
+                       data.size = sizeof(worddb_data);
+
+                       /*
+                        * Our data is the key creation time followed by the
+                        * key id.
+                        */
+                       worddb_data[ 0] = publickey->publickey->data[1];
+                       worddb_data[ 1] = publickey->publickey->data[2];
+                       worddb_data[ 2] = publickey->publickey->data[3];
+                       worddb_data[ 3] = publickey->publickey->data[4];
+                       worddb_data[ 4] = (keyid >> 56) & 0xFF;
+                       worddb_data[ 5] = (keyid >> 48) & 0xFF;
+                       worddb_data[ 6] = (keyid >> 40) & 0xFF;
+                       worddb_data[ 7] = (keyid >> 32) & 0xFF;
+                       worddb_data[ 8] = (keyid >> 24) & 0xFF;
+                       worddb_data[ 9] = (keyid >> 16) & 0xFF;
+                       worddb_data[10] = (keyid >>  8) & 0xFF;
+                       worddb_data[11] = keyid & 0xFF; 
+
+                       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 word: %s",
+                                               db_strerror(ret));
+                               }
+                       }
+
+                       if (ret != 0) {
+                               logthing(LOGTHING_ERROR,
+                                       "Problem deleting word: %s",
+                                       db_strerror(ret));
+                               if (ret == DB_LOCK_DEADLOCK) {
+                                       deadlock = true;
+                               }
+                       }
+               }
+               ret = cursor->c_close(cursor);
+               cursor = NULL;
+
+               /*
+                * Free our UID and word lists.
+                */
+               llfree(wordlist, NULL);
+               for (i = 0; uids[i] != NULL; i++) {
+                       free(uids[i]);
+                       uids[i] = NULL;
+               }
+               free(uids);
+               uids = NULL;
+               free_publickey(publickey);
+               publickey = NULL;
+       }
+
+       if (!deadlock) {
+               ret = id32db->cursor(id32db,
+                       txn,
+                       &cursor,
+                       0);   /* flags */
+
+               shortkeyid = keyid & 0xFFFFFFFF;
+
+               memset(&key, 0, sizeof(key));
+               memset(&data, 0, sizeof(data));
+               key.data = &shortkeyid;
+               key.size = sizeof(shortkeyid);
+               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 short keyid: %s",
+                                       db_strerror(ret));
+                       }
+               }
+
+               if (ret != 0) {
+                       logthing(LOGTHING_ERROR,
+                               "Problem deleting short keyid: %s",
+                               db_strerror(ret));
+                       if (ret == DB_LOCK_DEADLOCK) {
+                               deadlock = true;
+                       }
+               }
+
+               subkeyids = keysubkeys(publickey);
+               i = 0;
+               while (subkeyids != NULL && subkeyids[i] != 0) {
+                       shortkeyid = subkeyids[i++] & 0xFFFFFFFF;
+
+                       memset(&key, 0, sizeof(key));
+                       memset(&data, 0, sizeof(data));
+                       key.data = &shortkeyid;
+                       key.size = sizeof(shortkeyid);
+                       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 short"
+                                               " keyid: %s",
+                                               db_strerror(ret));
+                               }
+                       }
+
+                       if (ret != 0) {
+                               logthing(LOGTHING_ERROR,
+                                       "Problem deleting short keyid: %s",
+                                       db_strerror(ret));
+                               if (ret == DB_LOCK_DEADLOCK) {
+                                       deadlock = true;
+                               }
+                       }
+               }
+               if (subkeyids != NULL) {
+                       free(subkeyids);
+                       subkeyids = NULL;
                }
+
+               ret = cursor->c_close(cursor);
+               cursor = NULL;
        }
-       llfree(wordlist, NULL);
-       wordlist = NULL;
-       
-       for (newkeylist = keylist;
-                       newkeylist != NULL && numkeys < config.maxkeys;
-                       newkeylist = newkeylist->next) {
 
-                       keyid = 0;
-                       for (i = 4; i < 12; i++) {
-                               keyid <<= 8;
-                               keyid += ((unsigned char *)
-                                               newkeylist->object)[i];
-                       }
+       if (!deadlock) {
+               key.data = &keyid;
+               key.size = sizeof(keyid);
 
-                       numkeys += fetch_key(keyid,
-                                       publickey,
-                                       true);
+               keydb(keyid)->del(keydb(keyid),
+                               txn,
+                               &key,
+                               0); /* flags */
        }
-       llfree(keylist, free);
-       keylist = NULL;
-       free(searchtext);
-       searchtext = NULL;
 
-       ret = cursor->c_close(cursor);
-       cursor = NULL;
+       if (!intrans) {
+               db4_endtrans();
+       }
 
-       endtrans();
-       
-       return (numkeys);
+       return deadlock ? (-1) : (ret == DB_NOTFOUND);
 }
 
 /**
@@ -488,7 +725,8 @@ int fetch_key_text(const char *search, struct openpgp_publickey **publickey)
  *     the file. If update is true then we delete the old key first, otherwise
  *     we trust that it doesn't exist.
  */
-int store_key(struct openpgp_publickey *publickey, bool intrans, bool update)
+static int db4_store_key(struct openpgp_publickey *publickey, bool intrans,
+               bool update)
 {
        struct     openpgp_packet_list *packets = NULL;
        struct     openpgp_packet_list *list_end = NULL;
@@ -511,7 +749,7 @@ int store_key(struct openpgp_publickey *publickey, bool intrans, bool update)
        keyid = get_keyid(publickey);
 
        if (!intrans) {
-               starttrans();
+               db4_starttrans();
        }
 
        /*
@@ -523,7 +761,7 @@ int store_key(struct openpgp_publickey *publickey, bool intrans, bool update)
         * it definitely needs updated.
         */
        if (update) {
-               deadlock = (delete_key(keyid, true) == -1);
+               deadlock = (db4_delete_key(keyid, true) == -1);
        }
 
        /*
@@ -701,281 +939,76 @@ int store_key(struct openpgp_publickey *publickey, bool intrans, bool update)
        }
 
        if (!intrans) {
-               endtrans();
+               db4_endtrans();
        }
 
        return deadlock ? -1 : 0 ;
 }
 
 /**
- *     delete_key - Given a keyid delete the key from storage.
- *     @keyid: The keyid to delete.
- *     @intrans: If we're already in a transaction.
+ *     iterate_keys - call a function once for each key in the db.
+ *     @iterfunc: The function to call.
+ *     @ctx: A context pointer
  *
- *     This function deletes a public key from whatever storage mechanism we
- *     are using. Returns 0 if the key existed.
- */
-int delete_key(uint64_t keyid, bool intrans)
-{
-       struct openpgp_publickey *publickey = NULL;
-       DBT key, data;
-       DBC *cursor = NULL;
-       uint32_t   shortkeyid = 0;
-       uint64_t  *subkeyids = NULL;
-       int ret = 0;
-       int i;
-       char **uids = NULL;
-       char *primary = NULL;
-       unsigned char worddb_data[12];
-       struct ll *wordlist = NULL;
-       struct ll *curword  = NULL;
-       bool deadlock = false;
-
-       if (!intrans) {
-               starttrans();
-       }
-
-       fetch_key(keyid, &publickey, true);
-
-       /*
-        * Walk through the uids removing the words from the worddb.
-        */
-       if (publickey != NULL) {
-               uids = keyuids(publickey, &primary);
-       }
-       if (uids != NULL) {
-               for (i = 0; ret == 0 && uids[i] != NULL; i++) {
-                       wordlist = makewordlist(wordlist, uids[i]);
-               }
-                               
-               ret = worddb->cursor(worddb,
-                       txn,
-                       &cursor,
-                       0);   /* flags */
-
-               for (curword = wordlist; curword != NULL && !deadlock;
-                               curword = curword->next) {
-                       memset(&key, 0, sizeof(key));
-                       memset(&data, 0, sizeof(data));
-                       key.data = curword->object;
-                       key.size = strlen(key.data);
-                       data.data = worddb_data;
-                       data.size = sizeof(worddb_data);
-
-                       /*
-                        * Our data is the key creation time followed by the
-                        * key id.
-                        */
-                       worddb_data[ 0] = publickey->publickey->data[1];
-                       worddb_data[ 1] = publickey->publickey->data[2];
-                       worddb_data[ 2] = publickey->publickey->data[3];
-                       worddb_data[ 3] = publickey->publickey->data[4];
-                       worddb_data[ 4] = (keyid >> 56) & 0xFF;
-                       worddb_data[ 5] = (keyid >> 48) & 0xFF;
-                       worddb_data[ 6] = (keyid >> 40) & 0xFF;
-                       worddb_data[ 7] = (keyid >> 32) & 0xFF;
-                       worddb_data[ 8] = (keyid >> 24) & 0xFF;
-                       worddb_data[ 9] = (keyid >> 16) & 0xFF;
-                       worddb_data[10] = (keyid >>  8) & 0xFF;
-                       worddb_data[11] = keyid & 0xFF; 
-
-                       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 word: %s",
-                                               db_strerror(ret));
-                               }
-                       }
-
-                       if (ret != 0) {
-                               logthing(LOGTHING_ERROR,
-                                       "Problem deleting word: %s",
-                                       db_strerror(ret));
-                               if (ret == DB_LOCK_DEADLOCK) {
-                                       deadlock = true;
-                               }
-                       }
-               }
-               ret = cursor->c_close(cursor);
-               cursor = NULL;
-
-               /*
-                * Free our UID and word lists.
-                */
-               llfree(wordlist, NULL);
-               for (i = 0; uids[i] != NULL; i++) {
-                       free(uids[i]);
-                       uids[i] = NULL;
-               }
-               free(uids);
-               uids = NULL;
-               free_publickey(publickey);
-               publickey = NULL;
-       }
-
-       if (!deadlock) {
-               ret = id32db->cursor(id32db,
-                       txn,
-                       &cursor,
-                       0);   /* flags */
-
-               shortkeyid = keyid & 0xFFFFFFFF;
-
-               memset(&key, 0, sizeof(key));
-               memset(&data, 0, sizeof(data));
-               key.data = &shortkeyid;
-               key.size = sizeof(shortkeyid);
-               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 short keyid: %s",
-                                       db_strerror(ret));
-                       }
-               }
-
-               if (ret != 0) {
-                       logthing(LOGTHING_ERROR,
-                               "Problem deleting short keyid: %s",
-                               db_strerror(ret));
-                       if (ret == DB_LOCK_DEADLOCK) {
-                               deadlock = true;
-                       }
-               }
-
-               subkeyids = keysubkeys(publickey);
-               i = 0;
-               while (subkeyids != NULL && subkeyids[i] != 0) {
-                       shortkeyid = subkeyids[i++] & 0xFFFFFFFF;
-
-                       memset(&key, 0, sizeof(key));
-                       memset(&data, 0, sizeof(data));
-                       key.data = &shortkeyid;
-                       key.size = sizeof(shortkeyid);
-                       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 short"
-                                               " keyid: %s",
-                                               db_strerror(ret));
-                               }
-                       }
-
-                       if (ret != 0) {
-                               logthing(LOGTHING_ERROR,
-                                       "Problem deleting short keyid: %s",
-                                       db_strerror(ret));
-                               if (ret == DB_LOCK_DEADLOCK) {
-                                       deadlock = true;
-                               }
-                       }
-               }
-               if (subkeyids != NULL) {
-                       free(subkeyids);
-                       subkeyids = NULL;
-               }
-
-               ret = cursor->c_close(cursor);
-               cursor = NULL;
-       }
-
-       if (!deadlock) {
-               key.data = &keyid;
-               key.size = sizeof(keyid);
-
-               keydb(keyid)->del(keydb(keyid),
-                               txn,
-                               &key,
-                               0); /* flags */
-       }
-
-       if (!intrans) {
-               endtrans();
-       }
-
-       return deadlock ? (-1) : (ret == DB_NOTFOUND);
-}
-
-/**
- *     dumpdb - dump the key database
- *     @filenamebase: The base filename to use for the dump.
+ *     Calls iterfunc once for each key in the database. ctx is passed
+ *     unaltered to iterfunc. This function is intended to aid database dumps
+ *     and statistic calculations.
  *
- *     Dumps the database into one or more files, which contain pure OpenPGP
- *     that can be reimported into onak or gpg. filenamebase provides a base
- *     file name for the dump; several files may be created, all of which will
- *     begin with this string and then have a unique number and a .pgp
- *     extension.
+ *     Returns the number of keys we iterated over.
  */
-int dumpdb(char *filenamebase)
+static int db4_iterate_keys(void (*iterfunc)(void *ctx,
+               struct openpgp_publickey *key), void *ctx)
 {
-       DBT   key, data;
-       DBC  *cursor = NULL;
-       int   ret = 0;
-       int   fd = -1;
-       int   i = 0;
-       char  filename[1024];
-
-       filename[1023] = 0;
+       DBT                         dbkey, data;
+       DBC                        *cursor = NULL;
+       int                         ret = 0;
+       int                         i = 0;
+       int                         numkeys = 0;
+       struct buffer_ctx           fetchbuf;
+       struct openpgp_packet_list *packets = NULL;
+       struct openpgp_publickey   *key = NULL;
+
        for (i = 0; i < numdbs; i++) {
                ret = dbconns[i]->cursor(dbconns[i],
                        NULL,
                        &cursor,
                        0);   /* flags */
 
-               snprintf(filename, 1023, "%s.%d.pgp", filenamebase, i);
-               fd = open(filename, O_CREAT | O_WRONLY | O_TRUNC, 0640);
-               if (fd == -1) {
-                       logthing(LOGTHING_ERROR,
-                               "Error opening keydump file (%s): %s",
-                               filename,
-                               strerror(errno));
-               } else {
-                       memset(&key, 0, sizeof(key));
+               memset(&dbkey, 0, sizeof(dbkey));
+               memset(&data, 0, sizeof(data));
+               ret = cursor->c_get(cursor, &dbkey, &data, DB_NEXT);
+               while (ret == 0) {
+                       fetchbuf.buffer = data.data;
+                       fetchbuf.offset = 0;
+                       fetchbuf.size = data.size;
+                       read_openpgp_stream(buffer_fetchchar, &fetchbuf,
+                               &packets, 0);
+                       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, &key, &data, DB_NEXT);
-                       while (ret == 0) {
-                               write(fd, data.data, data.size);
-                               memset(&key, 0, sizeof(key));
-                               memset(&data, 0, sizeof(data));
-                               ret = cursor->c_get(cursor, &key, &data,
-                                               DB_NEXT);
-                       }
-                       if (ret != DB_NOTFOUND) {
-                               logthing(LOGTHING_ERROR,
-                                       "Problem reading key: %s",
-                                       db_strerror(ret));
-                       }
-                       close(fd);
+                       ret = cursor->c_get(cursor, &dbkey, &data,
+                                       DB_NEXT);
+                       numkeys++;
+               }
+               if (ret != DB_NOTFOUND) {
+                       logthing(LOGTHING_ERROR,
+                               "Problem reading key: %s",
+                               db_strerror(ret));
                }
 
                ret = cursor->c_close(cursor);
                cursor = NULL;
        }
        
-       return 0;
+       return numkeys;
 }
 
 /**
@@ -985,7 +1018,7 @@ int dumpdb(char *filenamebase)
  *     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.
  */
-uint64_t getfullkeyid(uint64_t keyid)
+static uint64_t db4_getfullkeyid(uint64_t keyid)
 {
        DBT       key, data;
        DBC      *cursor = NULL;
@@ -1032,4 +1065,22 @@ uint64_t getfullkeyid(uint64_t keyid)
  */
 #define NEED_GETKEYSIGS 1
 #define NEED_KEYID2UID 1
+#define NEED_UPDATEKEYS 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,
+       .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,
+};