94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
/*
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* Copyright (C) 2010 Martin Willi
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* Copyright (C) 2010 revosec AG
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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/**
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* @defgroup af_alg_ops af_alg_ops
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* @{ @ingroup af_alg
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*/
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#ifndef AF_ALG_OPS_H_
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#define AF_ALG_OPS_H_
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#include <library.h>
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#include <linux/if_alg.h>
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#ifndef AF_ALG
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#define AF_ALG 38
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#endif /* AF_ALG */
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#ifndef SOL_ALG
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#define SOL_ALG 279
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#endif /* SOL_ALG */
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typedef struct af_alg_ops_t af_alg_ops_t;
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/**
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* Helper to run AF_ALG operations.
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*/
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struct af_alg_ops_t {
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/**
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* Hash a chunk of data.
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*
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* @param data data to hash
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* @param out buffer to write hash to, NULL for append mode
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* @param outlen number of bytes to read into out
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* @return TRUE if successful
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*/
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bool (*hash)(af_alg_ops_t *this, chunk_t data, char *out, size_t outlen);
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/**
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* Reset hasher state.
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*/
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void (*reset)(af_alg_ops_t *this);
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/**
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* En-/Decrypt a chunk of data.
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*
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* @param type crypto operation (ALG_OP_DECRYPT/ALG_OP_ENCRYPT)
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* @param iv iv to use
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* @param data data to encrypt/decrypt
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* @param out buffer write processed data to
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* @return TRUE if successful
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*/
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bool (*crypt)(af_alg_ops_t *this, u_int32_t type, chunk_t iv, chunk_t data,
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char *out);
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/**
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* Set the key for en-/decryption or HMAC/XCBC operations.
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*
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* @param key key to set for transform
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* @return TRUE if successful
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*/
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bool (*set_key)(af_alg_ops_t *this, chunk_t key);
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/**
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* Destroy a af_alg_ops_t.
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*/
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void (*destroy)(af_alg_ops_t *this);
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};
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/**
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* Create a af_alg_ops instance.
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*
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* @param type algorithm type (hash, skcipher)
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* @param alg algorithm name
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* @return TRUE if AF_ALG socket bound successfully
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*/
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af_alg_ops_t *af_alg_ops_create(char *type, char *alg);
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#endif /** AF_ALG_OPS_H_ @}*/
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