*/
int merge_keys(struct openpgp_publickey *a, struct openpgp_publickey *b);
+/**
+ * update_keys - Takes a list of public keys and updates them in the DB.
+ * @keys: The keys to update in the DB.
+ *
+ * Takes a list of keys and adds them to the database, merging them with
+ * the key in the database if it's already present there. The key list is
+ * update to contain the minimum set of updates required to get from what
+ * we had before to what we have now (ie the set of data that was added to
+ * the DB). Returns the number of entirely new keys added.
+ */
+int update_keys(struct openpgp_publickey **keys);
+
+/**
+ * get_signed_packet - Gets a signed packet from a list.
+ * @packet_list: The list of packets to look in.
+ * @packet: The packet to look for.
+ *
+ * Walks through the signedpacket_list looking for the supplied packet and
+ * returns it if found. Otherwise returns NULL.
+ */
+struct openpgp_signedpacket_list *find_signed_packet(
+ struct openpgp_signedpacket_list *packet_list,
+ struct openpgp_packet *packet);
+
+/**
+ * merge_packet_sigs - Takes 2 signed packets and merges their sigs.
+ * @old: The old signed packet.
+ * @new: The new signed packet.
+ *
+ * Takes 2 signed packet list structures and the sigs of the packets on
+ * the head of these structures. These packets must both be the same and
+ * the fully merged structure is returned in old and the minimal
+ * difference to get from old to new in new.
+ */
+int merge_packet_sigs(struct openpgp_signedpacket_list *old,
+ struct openpgp_signedpacket_list *new);
+
#endif