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/*
* Copyright (C) 2017 sigma star gmbh
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* 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.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 51
* Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
*/
#ifndef UBIFS_CRYPTO_H
#define UBIFS_CRYPTO_H
#include <sys/types.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
struct cipher {
const char *name;
unsigned int key_length;
ssize_t (*encrypt_block)(const void *plaintext, size_t size,
const void *key, uint64_t block_index,
void *ciphertext);
ssize_t (*encrypt_fname)(const void *plaintext, size_t size,
const void *key, void *ciphertext);
unsigned int fscrypt_block_mode;
unsigned int fscrypt_fname_mode;
};
#ifdef WITH_CRYPTO
int crypto_init(void);
void crypto_cleanup(void);
ssize_t derive_key_aes(const void *deriving_key, const void *source_key,
size_t source_key_len, void *derived_key);
int derive_key_descriptor(const void *source_key, void *descriptor);
struct cipher *get_cipher(const char *name);
void list_ciphers(FILE *fp);
#else
static inline int crypto_init(void) { return 0;}
static inline void crypto_cleanup(void) {}
#endif /* WITH_CRYPTO */
#endif /* UBIFS_CRYPTO_H */
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