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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 af_alg_ops af_alg_ops
* @{ @ingroup af_alg
*/
#ifndef AF_ALG_OPS_H_
#define AF_ALG_OPS_H_
#include <library.h>
#include <linux/if_alg.h>
#ifndef AF_ALG
#define AF_ALG 38
#endif /* AF_ALG */
#ifndef SOL_ALG
#define SOL_ALG 279
#endif /* SOL_ALG */
typedef struct af_alg_ops_t af_alg_ops_t;
/**
* Helper to run AF_ALG operations.
*/
struct af_alg_ops_t {
/**
* Hash a chunk of data.
*
* @param data data to hash
* @param out buffer to write hash to, NULL for append mode
* @param outlen number of bytes to read into out
* @return TRUE if successful
*/
bool (*hash)(af_alg_ops_t *this, chunk_t data, char *out, size_t outlen);
/**
* Reset hasher state.
*/
void (*reset)(af_alg_ops_t *this);
/**
* En-/Decrypt a chunk of data.
*
* @param type crypto operation (ALG_OP_DECRYPT/ALG_OP_ENCRYPT)
* @param iv iv to use
* @param data data to encrypt/decrypt
* @param out buffer write processed data to
* @return TRUE if successful
*/
bool (*crypt)(af_alg_ops_t *this, uint32_t type, chunk_t iv, chunk_t data,
char *out);
/**
* Set the key for en-/decryption or HMAC/XCBC operations.
*
* @param key key to set for transform
* @return TRUE if successful
*/
bool (*set_key)(af_alg_ops_t *this, chunk_t key);
/**
* Destroy a af_alg_ops_t.
*/
void (*destroy)(af_alg_ops_t *this);
};
/**
* Create a af_alg_ops instance.
*
* @param type algorithm type (hash, skcipher)
* @param alg algorithm name
* @return TRUE if AF_ALG socket bound successfully
*/
af_alg_ops_t *af_alg_ops_create(char *type, char *alg);
#endif /** AF_ALG_OPS_H_ @}*/
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