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/*
* Copyright (C) 2010 Martin Willi
* Copyright (C) 2010 revosec AG
*
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
/**
* @defgroup tls_protection tls_protection
* @{ @ingroup libtls
*/
#ifndef TLS_PROTECTION_H_
#define TLS_PROTECTION_H_
#include <library.h>
#include "tls.h"
#include "tls_alert.h"
#include "tls_compression.h"
typedef struct tls_protection_t tls_protection_t;
/**
* TLS record protocol protection layer.
*/
struct tls_protection_t {
/**
* Process a protected TLS record, pass it to upper layers.
*
* @param type type of the TLS record to process
* @param data associated TLS record data
* @return
* - SUCCESS if TLS negotiation complete
* - FAILED if TLS handshake failed
* - NEED_MORE if more invocations to process/build needed
*/
status_t (*process)(tls_protection_t *this,
tls_content_type_t type, chunk_t data);
/**
* Query upper layer for TLS record, build protected record.
*
* @param type type of the built TLS record
* @param data allocated data of the built TLS record
* @return
* - SUCCESS if TLS negotiation complete
* - FAILED if TLS handshake failed
* - NEED_MORE if upper layers have more records to send
* - INVALID_STATE if more input records required
*/
status_t (*build)(tls_protection_t *this,
tls_content_type_t *type, chunk_t *data);
/**
* Set a new cipher, including encryption and integrity algorithms.
*
* @param inbound TRUE to use cipher for inbound data, FALSE for outbound
* @param signer new signer to use, gets owned by protection layer
* @param crypter new crypter to use, gets owned by protection layer
* @param iv initial IV for crypter, gets owned by protection layer
*/
void (*set_cipher)(tls_protection_t *this, bool inbound, signer_t *signer,
crypter_t *crypter, chunk_t iv);
/**
* Set the TLS version negotiated, used for MAC calculation.
*
* @param version TLS version negotiated
*/
void (*set_version)(tls_protection_t *this, tls_version_t version);
/**
* Destroy a tls_protection_t.
*/
void (*destroy)(tls_protection_t *this);
};
/**
* Create a tls_protection instance.
*
* @param compression compression layer of TLS stack
* @param alert TLS alert handler
* @return TLS protection layer.
*/
tls_protection_t *tls_protection_create(tls_compression_t *compression,
tls_alert_t *alert);
#endif /** TLS_PROTECTION_H_ @}*/
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