LXR linux/include/crypto/hash.h

   1/*
   2 * Hash: Hash algorithms under the crypto API
   3 * 
   4 * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
   5 *
   6 * This program is free software; you can redistribute it and/or modify it
   7 * under the terms of the GNU General Public License as published by the Free
   8 * Software Foundation; either version 2 of the License, or (at your option) 
   9 * any later version.
  10 *
  11 */
  12
  13#ifndef _CRYPTO_HASH_H
  14#define _CRYPTO_HASH_H
  15
  16#include <linux/crypto.h>
  17
  18struct crypto_ahash {
  19        struct crypto_tfm base;
  20};
  21
  22static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm)
  23{
  24        return (struct crypto_ahash *)tfm;
  25}
  26
  27static inline struct crypto_ahash *crypto_alloc_ahash(const char *alg_name,
  28                                                      u32 type, u32 mask)
  29{
  30        type &= ~CRYPTO_ALG_TYPE_MASK;
  31        mask &= ~CRYPTO_ALG_TYPE_MASK;
  32        type |= CRYPTO_ALG_TYPE_AHASH;
  33        mask |= CRYPTO_ALG_TYPE_AHASH_MASK;
  34
  35        return __crypto_ahash_cast(crypto_alloc_base(alg_name, type, mask));
  36}
  37
  38static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm)
  39{
  40        return &tfm->base;
  41}
  42
  43static inline void crypto_free_ahash(struct crypto_ahash *tfm)
  44{
  45        crypto_free_tfm(crypto_ahash_tfm(tfm));
  46}
  47
  48static inline unsigned int crypto_ahash_alignmask(
  49        struct crypto_ahash *tfm)
  50{
  51        return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm));
  52}
  53
  54static inline struct ahash_tfm *crypto_ahash_crt(struct crypto_ahash *tfm)
  55{
  56        return &crypto_ahash_tfm(tfm)->crt_ahash;
  57}
  58
  59static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm)
  60{
  61        return crypto_ahash_crt(tfm)->digestsize;
  62}
  63
  64static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm)
  65{
  66        return crypto_tfm_get_flags(crypto_ahash_tfm(tfm));
  67}
  68
  69static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags)
  70{
  71        crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags);
  72}
  73
  74static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags)
  75{
  76        crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags);
  77}
  78
  79static inline struct crypto_ahash *crypto_ahash_reqtfm(
  80        struct ahash_request *req)
  81{
  82        return __crypto_ahash_cast(req->base.tfm);
  83}
  84
  85static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm)
  86{
  87        return crypto_ahash_crt(tfm)->reqsize;
  88}
  89
  90static inline int crypto_ahash_setkey(struct crypto_ahash *tfm,
  91                                      const u8 *key, unsigned int keylen)
  92{
  93        struct ahash_tfm *crt = crypto_ahash_crt(tfm);
  94
  95        return crt->setkey(tfm, key, keylen);
  96}
  97
  98static inline int crypto_ahash_digest(struct ahash_request *req)
  99{
 100        struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
 101        return crt->digest(req);
 102}
 103
 104static inline int crypto_ahash_init(struct ahash_request *req)
 105{
 106        struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
 107        return crt->init(req);
 108}
 109
 110static inline int crypto_ahash_update(struct ahash_request *req)
 111{
 112        struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
 113        return crt->update(req);
 114}
 115
 116static inline int crypto_ahash_final(struct ahash_request *req)
 117{
 118        struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
 119        return crt->final(req);
 120}
 121
 122static inline void ahash_request_set_tfm(struct ahash_request *req,
 123                                         struct crypto_ahash *tfm)
 124{
 125        req->base.tfm = crypto_ahash_tfm(tfm);
 126}
 127
 128static inline struct ahash_request *ahash_request_alloc(
 129        struct crypto_ahash *tfm, gfp_t gfp)
 130{
 131        struct ahash_request *req;
 132
 133        req = kmalloc(sizeof(struct ahash_request) +
 134                      crypto_ahash_reqsize(tfm), gfp);
 135
 136        if (likely(req))
 137                ahash_request_set_tfm(req, tfm);
 138
 139        return req;
 140}
 141
 142static inline void ahash_request_free(struct ahash_request *req)
 143{
 144        kfree(req);
 145}
 146
 147static inline struct ahash_request *ahash_request_cast(
 148        struct crypto_async_request *req)
 149{
 150        return container_of(req, struct ahash_request, base);
 151}
 152
 153static inline void ahash_request_set_callback(struct ahash_request *req,
 154                                              u32 flags,
 155                                              crypto_completion_t complete,
 156                                              void *data)
 157{
 158        req->base.complete = complete;
 159        req->base.data = data;
 160        req->base.flags = flags;
 161}
 162
 163static inline void ahash_request_set_crypt(struct ahash_request *req,
 164                                           struct scatterlist *src, u8 *result,
 165                                           unsigned int nbytes)
 166{
 167        req->src = src;
 168        req->nbytes = nbytes;
 169        req->result = result;
 170}
 171
 172#endif  /* _CRYPTO_HASH_H */
 173