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/*
* (C) Copyright 2008-2010 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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; version 2 of
* the License.
*
* 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.
*
*/
#ifndef __DIGEST_H__
#define __DIGEST_H__
#include <linux/list.h>
struct digest;
struct crypto_alg {
char *name;
char *driver_name;
int priority;
#define DIGEST_ALGO_NEED_KEY (1 << 0)
unsigned int flags;
};
struct digest_algo {
struct crypto_alg base;
int (*alloc)(struct digest *d);
void (*free)(struct digest *d);
int (*init)(struct digest *d);
int (*update)(struct digest *d, const void *data, unsigned long len);
int (*final)(struct digest *d, unsigned char *md);
int (*digest)(struct digest *d, const void *data,
unsigned int len, u8 *out);
int (*set_key)(struct digest *d, const unsigned char *key, unsigned int len);
int (*verify)(struct digest *d, const unsigned char *md);
unsigned int length;
unsigned int ctx_length;
struct list_head list;
};
struct digest {
struct digest_algo *algo;
void *ctx;
unsigned int length;
};
/*
* digest functions
*/
int digest_algo_register(struct digest_algo *d);
void digest_algo_unregister(struct digest_algo *d);
void digest_algo_prints(const char *prefix);
struct digest *digest_alloc(const char *name);
void digest_free(struct digest *d);
int digest_file_window(struct digest *d, const char *filename,
unsigned char *hash,
unsigned char *sig,
ulong start, ulong size);
int digest_file(struct digest *d, const char *filename,
unsigned char *hash,
unsigned char *sig);
int digest_file_by_name(const char *algo, const char *filename,
unsigned char *hash,
unsigned char *sig);
static inline int digest_init(struct digest *d)
{
return d->algo->init(d);
}
static inline int digest_update(struct digest *d, const void *data,
unsigned long len)
{
return d->algo->update(d, data, len);
}
static inline int digest_final(struct digest *d, unsigned char *md)
{
return d->algo->final(d, md);
}
static inline int digest_digest(struct digest *d, const void *data,
unsigned int len, u8 *md)
{
return d->algo->digest(d, data, len, md);
}
static inline int digest_verify(struct digest *d, const unsigned char *md)
{
return d->algo->verify(d, md);
}
static inline int digest_length(struct digest *d)
{
return d->length ? d->length : d->algo->length;
}
static inline int digest_set_key(struct digest *d, const unsigned char *key,
unsigned int len)
{
if (!d->algo->set_key)
return -ENOTSUPP;
return d->algo->set_key(d, key, len);
}
static inline int digest_is_flags(struct digest *d, unsigned int flags)
{
return d->algo->base.flags & flags;
}
static inline const char *digest_name(struct digest *d)
{
return d->algo->base.name;
}
static inline void* digest_ctx(struct digest *d)
{
return d->ctx;
}
#endif /* __SH_ST_DEVICES_H__ */
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