Encrypt to own pubkey.

ox.go

@@ -342,6 +342,14 @@ func oxEncrypt(client *xmpp.Client, oxPrivKey *crypto.Key, recipient string,
 	if err != nil {
 		return "error", err
 	}
+	ownJid := strings.Split(client.JID(), "/")[0]
+	if recipient != ownJid {
+		opk, err := oxPrivKey.GetPublicKey()
+		if err == nil {
+			ownKey, _ := crypto.NewKey(opk)
+			_ = keyRing.AddKey(ownKey)
+		}
+	}
 	oxCryptMessage.Xmlns = nsOx
 	oxCryptMessage.To.Jid = recipient
 	oxCryptMessage.Time.Stamp = time.Now().UTC().Format("2006-01-02T15:04:05Z")