tls/ssl functions interface header has been added;

include/tlsport.h

@@ -0,0 +1,42 @@
+/*
+ * ejabberd external authentication program
+ *
+ * (c) Alexander Vdolainen 2013, 2018, 2019, 2021 <alex@vapaa.xyz>
+ *
+ * this is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * this is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.";
+ *
+ */
+
+#ifndef __TLSPORT_H__
+#define __TLSPORT_H__
+
+struct tlsport {
+  int fd;
+  SSL *ssl;
+  SSL_CTX *sslctx;
+};
+
+/* this function shall be called before main loop */
+int ssllib_init(void);
+
+/* this one after mainloop and/or on exit */
+int ssllib_free(void);
+
+/* creates a TLS connection (all info is in struct tlsport).
+ * returns -1 on error, 0 otherwise.
+ * first string is a hostname, second is a port or service name
+ */
+int tls_connect(const char *, const char *, struct tlsport *);
+
+#endif /* __TLSPORT_H__ */