143 lines
4.3 KiB
C
143 lines
4.3 KiB
C
|
/**
|
||
|
|
* \file ssl_ticket.h
|
||
|
|
*
|
||
|
|
* \brief TLS server ticket callbacks implementation
|
||
|
|
*/
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
|
||
|
|
* SPDX-License-Identifier: Apache-2.0
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License"); you may
|
||
|
|
* not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*
|
||
|
|
* This file is part of mbed TLS (https://tls.mbed.org)
|
||
|
|
*/
|
||
|
|
#ifndef MBEDTLS_SSL_TICKET_H
|
||
|
|
#define MBEDTLS_SSL_TICKET_H
|
||
|
|
|
||
|
|
#if !defined(MBEDTLS_CONFIG_FILE)
|
||
|
|
#include "config.h"
|
||
|
|
#else
|
||
|
|
#include MBEDTLS_CONFIG_FILE
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This implementation of the session ticket callbacks includes key
|
||
|
|
* management, rotating the keys periodically in order to preserve forward
|
||
|
|
* secrecy, when MBEDTLS_HAVE_TIME is defined.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "ssl.h"
|
||
|
|
#include "cipher.h"
|
||
|
|
|
||
|
|
#if defined(MBEDTLS_THREADING_C)
|
||
|
|
#include "threading.h"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \brief Information for session ticket protection
|
||
|
|
*/
|
||
|
|
typedef struct mbedtls_ssl_ticket_key
|
||
|
|
{
|
||
|
|
unsigned char name[4]; /*!< random key identifier */
|
||
|
|
uint32_t generation_time; /*!< key generation timestamp (seconds) */
|
||
|
|
mbedtls_cipher_context_t ctx; /*!< context for auth enc/decryption */
|
||
|
|
}
|
||
|
|
mbedtls_ssl_ticket_key;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \brief Context for session ticket handling functions
|
||
|
|
*/
|
||
|
|
typedef struct mbedtls_ssl_ticket_context
|
||
|
|
{
|
||
|
|
mbedtls_ssl_ticket_key keys[2]; /*!< ticket protection keys */
|
||
|
|
unsigned char active; /*!< index of the currently active key */
|
||
|
|
|
||
|
|
uint32_t ticket_lifetime; /*!< lifetime of tickets in seconds */
|
||
|
|
|
||
|
|
/** Callback for getting (pseudo-)random numbers */
|
||
|
|
int (*f_rng)(void *, unsigned char *, size_t);
|
||
|
|
void *p_rng; /*!< context for the RNG function */
|
||
|
|
|
||
|
|
#if defined(MBEDTLS_THREADING_C)
|
||
|
|
mbedtls_threading_mutex_t mutex;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
mbedtls_ssl_ticket_context;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \brief Initialize a ticket context.
|
||
|
|
* (Just make it ready for mbedtls_ssl_ticket_setup()
|
||
|
|
* or mbedtls_ssl_ticket_free().)
|
||
|
|
*
|
||
|
|
* \param ctx Context to be initialized
|
||
|
|
*/
|
||
|
|
void mbedtls_ssl_ticket_init( mbedtls_ssl_ticket_context *ctx );
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \brief Prepare context to be actually used
|
||
|
|
*
|
||
|
|
* \param ctx Context to be set up
|
||
|
|
* \param f_rng RNG callback function
|
||
|
|
* \param p_rng RNG callback context
|
||
|
|
* \param cipher AEAD cipher to use for ticket protection.
|
||
|
|
* Recommended value: MBEDTLS_CIPHER_AES_256_GCM.
|
||
|
|
* \param lifetime Tickets lifetime in seconds
|
||
|
|
* Recommended value: 86400 (one day).
|
||
|
|
*
|
||
|
|
* \note It is highly recommended to select a cipher that is at
|
||
|
|
* least as strong as the the strongest ciphersuite
|
||
|
|
* supported. Usually that means a 256-bit key.
|
||
|
|
*
|
||
|
|
* \note The lifetime of the keys is twice the lifetime of tickets.
|
||
|
|
* It is recommended to pick a reasonnable lifetime so as not
|
||
|
|
* to negate the benefits of forward secrecy.
|
||
|
|
*
|
||
|
|
* \return 0 if successful,
|
||
|
|
* or a specific MBEDTLS_ERR_XXX error code
|
||
|
|
*/
|
||
|
|
int mbedtls_ssl_ticket_setup( mbedtls_ssl_ticket_context *ctx,
|
||
|
|
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
|
||
|
|
mbedtls_cipher_type_t cipher,
|
||
|
|
uint32_t lifetime );
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \brief Implementation of the ticket write callback
|
||
|
|
*
|
||
|
|
* \note See \c mbedtls_ssl_ticket_write_t for description
|
||
|
|
*/
|
||
|
|
mbedtls_ssl_ticket_write_t mbedtls_ssl_ticket_write;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \brief Implementation of the ticket parse callback
|
||
|
|
*
|
||
|
|
* \note See \c mbedtls_ssl_ticket_parse_t for description
|
||
|
|
*/
|
||
|
|
mbedtls_ssl_ticket_parse_t mbedtls_ssl_ticket_parse;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \brief Free a context's content and zeroize it.
|
||
|
|
*
|
||
|
|
* \param ctx Context to be cleaned up
|
||
|
|
*/
|
||
|
|
void mbedtls_ssl_ticket_free( mbedtls_ssl_ticket_context *ctx );
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* ssl_ticket.h */
|