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/*
* Hash: Hash algorithms under the crypto API
*
* Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
*
* 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.
*
*/
#ifndef _CRYPTO_HASH_H
#define _CRYPTO_HASH_H
#include <linux/crypto.h>
#include <linux/string.h>
struct shash_desc {
struct crypto_shash *tfm;
u32 flags;
void *__ctx[] CRYPTO_MINALIGN_ATTR;
};
#define SHASH_DESC_ON_STACK(shash, ctx) \
char __##shash##_desc[sizeof(struct shash_desc) + \
crypto_shash_descsize(ctx)] CRYPTO_MINALIGN_ATTR; \
struct shash_desc *shash = (struct shash_desc *)__##shash##_desc
struct shash_alg {
int (*init)(struct shash_desc *desc);
int (*update)(struct shash_desc *desc, const u8 *data, unsigned len);
int (*final)(struct shash_desc *desc, u8 *out);
int (*finup)(struct shash_desc *desc, const u8 *data,
unsigned len, u8 *out);
int (*digest)(struct shash_desc *desc, const u8 *data,
unsigned len, u8 *out);
unsigned descsize;
unsigned digestsize;
struct crypto_alg base;
};
struct crypto_shash {
unsigned descsize;
struct crypto_tfm base;
};
struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
u32 mask);
static inline struct crypto_tfm *crypto_shash_tfm(struct crypto_shash *tfm)
{
return &tfm->base;
}
static inline void crypto_free_shash(struct crypto_shash *tfm)
{
crypto_destroy_tfm(tfm, crypto_shash_tfm(tfm));
}
static inline struct shash_alg *__crypto_shash_alg(struct crypto_alg *alg)
{
return container_of(alg, struct shash_alg, base);
}
static inline struct shash_alg *crypto_shash_alg(struct crypto_shash *tfm)
{
return __crypto_shash_alg(crypto_shash_tfm(tfm)->__crt_alg);
}
static inline unsigned crypto_shash_digestsize(struct crypto_shash *tfm)
{
return crypto_shash_alg(tfm)->digestsize;
}
static inline unsigned crypto_shash_descsize(struct crypto_shash *tfm)
{
return tfm->descsize;
}
static inline void *shash_desc_ctx(struct shash_desc *desc)
{
return desc->__ctx;
}
static inline int crypto_shash_init(struct shash_desc *desc)
{
return crypto_shash_alg(desc->tfm)->init(desc);
}
static inline int crypto_shash_update(struct shash_desc *desc,
const u8 *data, unsigned len)
{
return crypto_shash_alg(desc->tfm)->update(desc, data, len);
}
static inline int crypto_shash_final(struct shash_desc *desc, u8 *out)
{
return crypto_shash_alg(desc->tfm)->final(desc, out);
}
static inline int crypto_shash_finup(struct shash_desc *desc, const u8 *data,
unsigned len, u8 *out)
{
return crypto_shash_alg(desc->tfm)->finup(desc, data, len, out);
}
static inline int crypto_shash_digest(struct shash_desc *desc, const u8 *data,
unsigned len, u8 *out)
{
return crypto_shash_alg(desc->tfm)->digest(desc, data, len, out);
}
#endif /* _CRYPTO_HASH_H */
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