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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>
struct shash_desc {
struct crypto_shash *tfm;
u32 flags;
void *__ctx[] CRYPTO_MINALIGN_ATTR;
};
struct shash_alg {
int (*init)(struct shash_desc *desc);
int (*update)(struct shash_desc *desc, const u8 *data,
unsigned int len);
int (*final)(struct shash_desc *desc, u8 *out);
int (*finup)(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *out);
int (*digest)(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *out);
int (*setkey)(struct crypto_shash *tfm, const u8 *key,
unsigned int keylen);
unsigned int descsize;
unsigned int digestsize;
struct crypto_alg base;
};
struct crypto_ahash {
struct crypto_tfm base;
};
struct crypto_shash {
struct crypto_tfm base;
};
static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm)
{
return (struct crypto_ahash *)tfm;
}
static inline struct crypto_ahash *crypto_alloc_ahash(const char *alg_name,
u32 type, u32 mask)
{
type &= ~CRYPTO_ALG_TYPE_MASK;
mask &= ~CRYPTO_ALG_TYPE_MASK;
type |= CRYPTO_ALG_TYPE_AHASH;
mask |= CRYPTO_ALG_TYPE_AHASH_MASK;
return __crypto_ahash_cast(crypto_alloc_base(alg_name, type, mask));
}
static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm)
{
return &tfm->base;
}
static inline void crypto_free_ahash(struct crypto_ahash *tfm)
{
crypto_free_tfm(crypto_ahash_tfm(tfm));
}
static inline unsigned int crypto_ahash_alignmask(
struct crypto_ahash *tfm)
{
return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm));
}
static inline struct ahash_tfm *crypto_ahash_crt(struct crypto_ahash *tfm)
{
return &crypto_ahash_tfm(tfm)->crt_ahash;
}
static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm)
{
return crypto_ahash_crt(tfm)->digestsize;
}
static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm)
{
return crypto_tfm_get_flags(crypto_ahash_tfm(tfm));
}
static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags)
{
crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags);
}
static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags)
{
crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags);
}
static inline struct crypto_ahash *crypto_ahash_reqtfm(
struct ahash_request *req)
{
return __crypto_ahash_cast(req->base.tfm);
}
static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm)
{
return crypto_ahash_crt(tfm)->reqsize;
}
static inline int crypto_ahash_setkey(struct crypto_ahash *tfm,
const u8 *key, unsigned int keylen)
{
struct ahash_tfm *crt = crypto_ahash_crt(tfm);
return crt->setkey(tfm, key, keylen);
}
static inline int crypto_ahash_digest(struct ahash_request *req)
{
struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
return crt->digest(req);
}
static inline int crypto_ahash_init(struct ahash_request *req)
{
struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
return crt->init(req);
}
static inline int crypto_ahash_update(struct ahash_request *req)
{
struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
return crt->update(req);
}
static inline int crypto_ahash_final(struct ahash_request *req)
{
struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
return crt->final(req);
}
static inline void ahash_request_set_tfm(struct ahash_request *req,
struct crypto_ahash *tfm)
{
req->base.tfm = crypto_ahash_tfm(tfm);
}
static inline struct ahash_request *ahash_request_alloc(
struct crypto_ahash *tfm, gfp_t gfp)
{
struct ahash_request *req;
req = kmalloc(sizeof(struct ahash_request) +
crypto_ahash_reqsize(tfm), gfp);
if (likely(req))
ahash_request_set_tfm(req, tfm);
return req;
}
static inline void ahash_request_free(struct ahash_request *req)
{
kfree(req);
}
static inline struct ahash_request *ahash_request_cast(
struct crypto_async_request *req)
{
return container_of(req, struct ahash_request, base);
}
static inline void ahash_request_set_callback(struct ahash_request *req,
u32 flags,
crypto_completion_t complete,
void *data)
{
req->base.complete = complete;
req->base.data = data;
req->base.flags = flags;
}
static inline void ahash_request_set_crypt(struct ahash_request *req,
struct scatterlist *src, u8 *result,
unsigned int nbytes)
{
req->src = src;
req->nbytes = nbytes;
req->result = result;
}
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_free_tfm(crypto_shash_tfm(tfm));
}
static inline unsigned int crypto_shash_alignmask(
struct crypto_shash *tfm)
{
return crypto_tfm_alg_alignmask(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 int crypto_shash_digestsize(struct crypto_shash *tfm)
{
return crypto_shash_alg(tfm)->digestsize;
}
static inline u32 crypto_shash_get_flags(struct crypto_shash *tfm)
{
return crypto_tfm_get_flags(crypto_shash_tfm(tfm));
}
static inline void crypto_shash_set_flags(struct crypto_shash *tfm, u32 flags)
{
crypto_tfm_set_flags(crypto_shash_tfm(tfm), flags);
}
static inline void crypto_shash_clear_flags(struct crypto_shash *tfm, u32 flags)
{
crypto_tfm_clear_flags(crypto_shash_tfm(tfm), flags);
}
static inline unsigned int crypto_shash_descsize(struct crypto_shash *tfm)
{
return crypto_shash_alg(tfm)->descsize;
}
static inline void *shash_desc_ctx(struct shash_desc *desc)
{
return desc->__ctx;
}
int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key,
unsigned int keylen);
int crypto_shash_digest(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *out);
static inline int crypto_shash_init(struct shash_desc *desc)
{
return crypto_shash_alg(desc->tfm)->init(desc);
}
int crypto_shash_update(struct shash_desc *desc, const u8 *data,
unsigned int len);
int crypto_shash_final(struct shash_desc *desc, u8 *out);
int crypto_shash_finup(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *out);
#endif /* _CRYPTO_HASH_H */
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