298 lines
7.3 KiB
C
298 lines
7.3 KiB
C
/*
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* Hash: Hash algorithms under the crypto API
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*
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* Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
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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 Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#ifndef _CRYPTO_HASH_H
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#define _CRYPTO_HASH_H
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#include <linux/crypto.h>
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struct shash_desc {
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struct crypto_shash *tfm;
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u32 flags;
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void *__ctx[] CRYPTO_MINALIGN_ATTR;
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};
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struct shash_alg {
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int (*init)(struct shash_desc *desc);
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int (*reinit)(struct shash_desc *desc);
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int (*update)(struct shash_desc *desc, const u8 *data,
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unsigned int len);
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int (*final)(struct shash_desc *desc, u8 *out);
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int (*finup)(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *out);
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int (*digest)(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *out);
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int (*setkey)(struct crypto_shash *tfm, const u8 *key,
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unsigned int keylen);
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unsigned int descsize;
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unsigned int digestsize;
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struct crypto_alg base;
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};
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struct crypto_ahash {
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struct crypto_tfm base;
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};
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struct crypto_shash {
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struct crypto_tfm base;
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};
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static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm)
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{
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return (struct crypto_ahash *)tfm;
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}
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static inline struct crypto_ahash *crypto_alloc_ahash(const char *alg_name,
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u32 type, u32 mask)
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{
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type &= ~CRYPTO_ALG_TYPE_MASK;
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mask &= ~CRYPTO_ALG_TYPE_MASK;
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type |= CRYPTO_ALG_TYPE_AHASH;
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mask |= CRYPTO_ALG_TYPE_AHASH_MASK;
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return __crypto_ahash_cast(crypto_alloc_base(alg_name, type, mask));
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}
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static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm)
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{
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return &tfm->base;
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}
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static inline void crypto_free_ahash(struct crypto_ahash *tfm)
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{
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crypto_free_tfm(crypto_ahash_tfm(tfm));
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}
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static inline unsigned int crypto_ahash_alignmask(
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struct crypto_ahash *tfm)
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{
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return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm));
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}
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static inline struct ahash_tfm *crypto_ahash_crt(struct crypto_ahash *tfm)
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{
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return &crypto_ahash_tfm(tfm)->crt_ahash;
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}
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static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm)
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{
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return crypto_ahash_crt(tfm)->digestsize;
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}
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static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm)
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{
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return crypto_tfm_get_flags(crypto_ahash_tfm(tfm));
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}
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static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags)
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{
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crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags);
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}
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static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags)
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{
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crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags);
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}
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static inline struct crypto_ahash *crypto_ahash_reqtfm(
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struct ahash_request *req)
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{
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return __crypto_ahash_cast(req->base.tfm);
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}
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static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm)
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{
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return crypto_ahash_crt(tfm)->reqsize;
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}
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static inline void *ahash_request_ctx(struct ahash_request *req)
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{
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return req->__ctx;
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}
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static inline int crypto_ahash_setkey(struct crypto_ahash *tfm,
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const u8 *key, unsigned int keylen)
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{
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struct ahash_tfm *crt = crypto_ahash_crt(tfm);
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return crt->setkey(tfm, key, keylen);
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}
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static inline int crypto_ahash_digest(struct ahash_request *req)
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{
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struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
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return crt->digest(req);
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}
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static inline void crypto_ahash_export(struct ahash_request *req, u8 *out)
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{
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memcpy(out, ahash_request_ctx(req),
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crypto_ahash_reqsize(crypto_ahash_reqtfm(req)));
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}
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int crypto_ahash_import(struct ahash_request *req, const u8 *in);
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static inline int crypto_ahash_init(struct ahash_request *req)
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{
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struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
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return crt->init(req);
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}
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static inline int crypto_ahash_update(struct ahash_request *req)
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{
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struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
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return crt->update(req);
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}
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static inline int crypto_ahash_final(struct ahash_request *req)
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{
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struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
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return crt->final(req);
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}
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static inline void ahash_request_set_tfm(struct ahash_request *req,
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struct crypto_ahash *tfm)
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{
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req->base.tfm = crypto_ahash_tfm(tfm);
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}
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static inline struct ahash_request *ahash_request_alloc(
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struct crypto_ahash *tfm, gfp_t gfp)
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{
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struct ahash_request *req;
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req = kmalloc(sizeof(struct ahash_request) +
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crypto_ahash_reqsize(tfm), gfp);
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if (likely(req))
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ahash_request_set_tfm(req, tfm);
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return req;
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}
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static inline void ahash_request_free(struct ahash_request *req)
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{
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kfree(req);
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}
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static inline struct ahash_request *ahash_request_cast(
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struct crypto_async_request *req)
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{
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return container_of(req, struct ahash_request, base);
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}
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static inline void ahash_request_set_callback(struct ahash_request *req,
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u32 flags,
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crypto_completion_t complete,
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void *data)
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{
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req->base.complete = complete;
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req->base.data = data;
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req->base.flags = flags;
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}
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static inline void ahash_request_set_crypt(struct ahash_request *req,
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struct scatterlist *src, u8 *result,
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unsigned int nbytes)
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{
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req->src = src;
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req->nbytes = nbytes;
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req->result = result;
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}
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struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
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u32 mask);
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static inline struct crypto_tfm *crypto_shash_tfm(struct crypto_shash *tfm)
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{
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return &tfm->base;
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}
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static inline void crypto_free_shash(struct crypto_shash *tfm)
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{
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crypto_free_tfm(crypto_shash_tfm(tfm));
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}
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static inline unsigned int crypto_shash_alignmask(
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struct crypto_shash *tfm)
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{
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return crypto_tfm_alg_alignmask(crypto_shash_tfm(tfm));
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}
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static inline struct shash_alg *__crypto_shash_alg(struct crypto_alg *alg)
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{
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return container_of(alg, struct shash_alg, base);
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}
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static inline struct shash_alg *crypto_shash_alg(struct crypto_shash *tfm)
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{
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return __crypto_shash_alg(crypto_shash_tfm(tfm)->__crt_alg);
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}
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static inline unsigned int crypto_shash_digestsize(struct crypto_shash *tfm)
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{
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return crypto_shash_alg(tfm)->digestsize;
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}
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static inline u32 crypto_shash_get_flags(struct crypto_shash *tfm)
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{
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return crypto_tfm_get_flags(crypto_shash_tfm(tfm));
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}
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static inline void crypto_shash_set_flags(struct crypto_shash *tfm, u32 flags)
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{
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crypto_tfm_set_flags(crypto_shash_tfm(tfm), flags);
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}
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static inline void crypto_shash_clear_flags(struct crypto_shash *tfm, u32 flags)
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{
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crypto_tfm_clear_flags(crypto_shash_tfm(tfm), flags);
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}
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static inline unsigned int crypto_shash_descsize(struct crypto_shash *tfm)
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{
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return crypto_shash_alg(tfm)->descsize;
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}
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static inline void *shash_desc_ctx(struct shash_desc *desc)
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{
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return desc->__ctx;
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}
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int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key,
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unsigned int keylen);
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int crypto_shash_digest(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *out);
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static inline void crypto_shash_export(struct shash_desc *desc, u8 *out)
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{
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memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm));
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}
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int crypto_shash_import(struct shash_desc *desc, const u8 *in);
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static inline int crypto_shash_init(struct shash_desc *desc)
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{
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return crypto_shash_alg(desc->tfm)->init(desc);
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}
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int crypto_shash_update(struct shash_desc *desc, const u8 *data,
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unsigned int len);
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int crypto_shash_final(struct shash_desc *desc, u8 *out);
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int crypto_shash_finup(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *out);
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#endif /* _CRYPTO_HASH_H */
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