mbedtls/include/polarssl/ssl_cookie.h
2015-01-23 11:37:14 +00:00

103 lines
2.9 KiB
C

/**
* \file ssl_cookie.h
*
* \brief DTLS cookie callbacks implementation
*
* Copyright (C) 2014, Brainspark B.V.
*
* This file is part of mbed TLS (https://www.polarssl.org)
*
* This program 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 program 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef POLARSSL_SSL_COOKIE_H
#define POLARSSL_SSL_COOKIE_H
#include "ssl.h"
/**
* \name SECTION: Module settings
*
* The configuration options you can set for this module are in this section.
* Either change them in config.h or define them on the compiler command line.
* \{
*/
#ifndef POLARSSL_SSL_COOKIE_TIMEOUT
#define POLARSSL_SSL_COOKIE_TIMEOUT 60 /**< Default expiration delay of DTLS cookies, in seconds if HAVE_TIME, or in number of cookies issued */
#endif
/* \} name SECTION: Module settings */
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief Context for the default cookie functions.
*/
typedef struct
{
md_context_t hmac_ctx; /*!< context for the HMAC portion */
#if !defined(POLARSSL_HAVE_TIME)
unsigned long serial; /*!< serial number for expiration */
#endif
unsigned long timeout; /*!< timeout delay, in seconds if HAVE_TIME,
or in number of tickets issued */
} ssl_cookie_ctx;
/**
* \brief Initialize cookie context
*/
void ssl_cookie_init( ssl_cookie_ctx *ctx );
/**
* \brief Setup cookie context (generate keys)
*/
int ssl_cookie_setup( ssl_cookie_ctx *ctx,
int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng );
/**
* \brief Set expiration delay for cookies
* (Default POLARSSL_SSL_COOKIE_TIMEOUT)
*
* \param ctx Cookie contex
* \param delay Delay, in seconds if HAVE_TIME, or in number of cookies
* issued in the meantime.
* 0 to disable expiration (NOT recommended)
*/
void ssl_cookie_set_timeout( ssl_cookie_ctx *ctx, unsigned long delay );
/**
* \brief Free cookie context
*/
void ssl_cookie_free( ssl_cookie_ctx *ctx );
/**
* \brief Generate cookie, see \c ssl_cookie_write_t
*/
ssl_cookie_write_t ssl_cookie_write;
/**
* \brief Verify cookie, see \c ssl_cookie_write_t
*/
ssl_cookie_check_t ssl_cookie_check;
#ifdef __cplusplus
}
#endif
#endif /* ssl_cookie.h */