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   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
  18 struct crypto_ahash {
  19         struct crypto_tfm base;
  20 };
  21
  22 static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm)
  23 {
  24         return (struct crypto_ahash *)tfm;
  25 }
  26
  27 static 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
  38 static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm)
  39 {
  40         return &tfm->base;
  41 }
  42
  43 static inline void crypto_free_ahash(struct crypto_ahash *tfm)
  44 {
  45         crypto_free_tfm(crypto_ahash_tfm(tfm));
  46 }
  47
  48 static inline unsigned int crypto_ahash_alignmask(
  49         struct crypto_ahash *tfm)
  50 {
  51         return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm));
  52 }
  53
  54 static inline struct ahash_tfm *crypto_ahash_crt(struct crypto_ahash *tfm)
  55 {
  56         return &crypto_ahash_tfm(tfm)->crt_ahash;
  57 }
  58
  59 static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm)
  60 {
  61         return crypto_ahash_crt(tfm)->digestsize;
  62 }
  63
  64 static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm)
  65 {
  66         return crypto_tfm_get_flags(crypto_ahash_tfm(tfm));
  67 }
  68
  69 static 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
  74 static 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
  79 static inline struct crypto_ahash *crypto_ahash_reqtfm(
  80         struct ahash_request *req)
  81 {
  82         return __crypto_ahash_cast(req->base.tfm);
  83 }
  84
  85 static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm)
  86 {
  87         return crypto_ahash_crt(tfm)->reqsize;
  88 }
  89
  90 static 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
  98 static 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
 104 static 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
 110 static 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
 116 static 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
 122 static 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
 128 static 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
 142 static inline void ahash_request_free(struct ahash_request *req)
 143 {
 144         kfree(req);
 145 }
 146
 147 static 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
 153 static 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
 163 static 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 */