/*
* eap-tls.h
*
* Copyright (c) Beniamino Galvani 2005 All rights reserved.
*               Jan Just Keijser  2006-2019 All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in
*    the documentation and/or other materials provided with the
*    distribution.
*
* 3. The name(s) of the authors of this software must not be used to
*    endorse or promote products derived from this software without
*    prior written permission.
*
* THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/

#ifndef PPP_EAP_TLS_H
#define PPP_EAP_TLS_H

#include "pppdconf.h"
#include "eap.h"

#include <openssl/ssl.h>
#include <openssl/bio.h>

#define EAP_TLS_FLAGS_LI        128    /* length included flag */
#define EAP_TLS_FLAGS_MF        64     /* more fragments flag */
#define EAP_TLS_FLAGS_START     32     /* start flag */

#define EAP_TLS_MAX_LEN         65536  /* max eap tls packet size */

struct tls_info;

struct eaptls_session
{
   u_char *data;               /* buffered data */
   int datalen;                /* buffered data len */
   int offset;                 /* from where to send */
   int tlslen;                 /* total length of tls data */
   bool frag;                  /* packet is fragmented */
   bool tls_v13;               /* whether we've negotiated TLSv1.3 */
   SSL_CTX *ctx;
   SSL *ssl;                   /* ssl connection */
   BIO *from_ssl;
   BIO *into_ssl;
   char peercertfile[MAXWORDLEN];
   bool alert_sent;
   u_char alert_sent_desc;
   bool alert_recv;
   u_char alert_recv_desc;
   char rtx[EAP_TLS_MAX_LEN];  /* retransmission buffer */
   int rtx_len;
   int mtu;                    /* unit mtu */
   struct tls_info *info;
};


SSL_CTX *eaptls_init_ssl(int init_server, char *cacertfile, char *capath,
           char *certfile, char *privkeyfile, char *pkcs12);
int eaptls_init_ssl_server(eap_state * esp);
int eaptls_init_ssl_client(eap_state * esp);
void eaptls_free_session(struct eaptls_session *ets);

int eaptls_is_init_finished(struct eaptls_session *ets);

int eaptls_receive(struct eaptls_session *ets, u_char * inp, int len);
int eaptls_send(struct eaptls_session *ets, u_char ** outp);
void eaptls_retransmit(struct eaptls_session *ets, u_char ** outp);

int get_eaptls_secret(int unit, char *client, char *server,
             char *clicertfile, char *servcertfile, char *cacertfile,
             char *capath, char *pkfile, char *pkcs12, int am_server);

#ifdef PPP_WITH_MPPE
void eaptls_gen_mppe_keys(struct eaptls_session *ets, int client);
#endif

#endif