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/* Copyright (c) 2015, Vsevolod Stakhov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
*
* THIS SOFTWARE IS PROVIDED ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CRYPTOBOX_H_
#define CRYPTOBOX_H_
#include "config.h"
#define rspamd_cryptobox_NONCEBYTES 24
#define rspamd_cryptobox_PKBYTES 32
#define rspamd_cryptobox_SKBYTES 32
#define rspamd_cryptobox_MACBYTES 16
#define rspamd_cryptobox_NMBYTES 32
typedef guchar rspamd_pk_t[rspamd_cryptobox_PKBYTES];
typedef guchar rspamd_sk_t[rspamd_cryptobox_SKBYTES];
typedef guchar rspamd_sig_t[rspamd_cryptobox_MACBYTES];
typedef guchar rspamd_nm_t[rspamd_cryptobox_NMBYTES];
struct rspamd_encrypt_segment {
guchar *buf;
gsize len;
};
/**
* Init cryptobox library
*/
void rspamd_cryptobox_init (void);
/**
* Generate new keypair
* @param pk public key buffer
* @param sk secret key buffer
*/
void rspamd_cryptobox_keypair (rspamd_pk_t pk, rspamd_sk_t sk);
/**
* Encrypt segments of data inplace adding signature to sig afterwards
* @param segments segments of data
* @param cnt count of segments
* @param pk remote pubkey
* @param sk local secret key
* @param sig output signature
*/
void rspamd_cryptobox_encrypt_inplace (struct rspamd_encrypt_segment *segments,
gsize cnt, const rspamd_pk_t pk, const rspamd_sk_t sk, rspamd_sig_t sig);
/**
* Decrypt and verify data chunk inplace
* @param data data to decrypt
* @param len lenght of data
* @param pk remote pubkey
* @param sk local privkey
* @param sig signature input
* @return TRUE if input has been verified successfully
*/
gboolean rspamd_cryptobox_decrypt_inplace (guchar *data, gsize len,
const rspamd_pk_t pk, const rspamd_sk_t sk, const rspamd_sig_t sig);
/**
* Encrypt segments of data inplace adding signature to sig afterwards
* @param segments segments of data
* @param cnt count of segments
* @param pk remote pubkey
* @param sk local secret key
* @param sig output signature
*/
void rspamd_cryptobox_encrypt_nm_inplace (struct rspamd_encrypt_segment *segments,
gsize cnt, const rspamd_nm_t nm, rspamd_sig_t sig);
/**
* Decrypt and verify data chunk inplace
* @param data data to decrypt
* @param len lenght of data
* @param pk remote pubkey
* @param sk local privkey
* @param sig signature input
* @return TRUE if input has been verified successfully
*/
gboolean rspamd_cryptobox_decrypt_nm_inplace (guchar *data, gsize len,
const rspamd_nm_t nm, const rspamd_sig_t sig);
/**
* Generate shared secret from local sk and remote pk
* @param nm shared secret
* @param pk remote pubkey
* @param sk local privkey
*/
void rspamd_cryptobox_nm (rspamd_nm_t nm, rspamd_pk_t pk, rspamd_sk_t sk);
/**
* Securely clear the buffer specified
* @param buf buffer to zero
* @param buflen length of buffer
*/
void rspamd_explicit_memzero (void * const buf, gsize buflen);
#endif /* CRYPTOBOX_H_ */
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