2 * Hash: Hash algorithms under the crypto API
4 * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
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)
13 #ifndef _CRYPTO_HASH_H
14 #define _CRYPTO_HASH_H
16 #include <linux/crypto.h>
19 struct crypto_shash
*tfm
;
22 void *__ctx
[] CRYPTO_MINALIGN_ATTR
;
26 int (*init
)(struct shash_desc
*desc
);
27 int (*update
)(struct shash_desc
*desc
, const u8
*data
,
29 int (*final
)(struct shash_desc
*desc
, u8
*out
);
30 int (*finup
)(struct shash_desc
*desc
, const u8
*data
,
31 unsigned int len
, u8
*out
);
32 int (*digest
)(struct shash_desc
*desc
, const u8
*data
,
33 unsigned int len
, u8
*out
);
34 int (*export
)(struct shash_desc
*desc
, void *out
);
35 int (*import
)(struct shash_desc
*desc
, const void *in
);
36 int (*setkey
)(struct crypto_shash
*tfm
, const u8
*key
,
39 unsigned int descsize
;
40 unsigned int digestsize
;
41 unsigned int statesize
;
43 struct crypto_alg base
;
47 struct crypto_tfm base
;
51 unsigned int descsize
;
52 struct crypto_tfm base
;
55 static inline struct crypto_ahash
*__crypto_ahash_cast(struct crypto_tfm
*tfm
)
57 return (struct crypto_ahash
*)tfm
;
60 static inline struct crypto_ahash
*crypto_alloc_ahash(const char *alg_name
,
63 type
&= ~CRYPTO_ALG_TYPE_MASK
;
64 mask
&= ~CRYPTO_ALG_TYPE_MASK
;
65 type
|= CRYPTO_ALG_TYPE_AHASH
;
66 mask
|= CRYPTO_ALG_TYPE_AHASH_MASK
;
68 return __crypto_ahash_cast(crypto_alloc_base(alg_name
, type
, mask
));
71 static inline struct crypto_tfm
*crypto_ahash_tfm(struct crypto_ahash
*tfm
)
76 static inline void crypto_free_ahash(struct crypto_ahash
*tfm
)
78 crypto_free_tfm(crypto_ahash_tfm(tfm
));
81 static inline unsigned int crypto_ahash_alignmask(
82 struct crypto_ahash
*tfm
)
84 return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm
));
87 static inline struct ahash_tfm
*crypto_ahash_crt(struct crypto_ahash
*tfm
)
89 return &crypto_ahash_tfm(tfm
)->crt_ahash
;
92 static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash
*tfm
)
94 return crypto_ahash_crt(tfm
)->digestsize
;
97 static inline u32
crypto_ahash_get_flags(struct crypto_ahash
*tfm
)
99 return crypto_tfm_get_flags(crypto_ahash_tfm(tfm
));
102 static inline void crypto_ahash_set_flags(struct crypto_ahash
*tfm
, u32 flags
)
104 crypto_tfm_set_flags(crypto_ahash_tfm(tfm
), flags
);
107 static inline void crypto_ahash_clear_flags(struct crypto_ahash
*tfm
, u32 flags
)
109 crypto_tfm_clear_flags(crypto_ahash_tfm(tfm
), flags
);
112 static inline struct crypto_ahash
*crypto_ahash_reqtfm(
113 struct ahash_request
*req
)
115 return __crypto_ahash_cast(req
->base
.tfm
);
118 static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash
*tfm
)
120 return crypto_ahash_crt(tfm
)->reqsize
;
123 static inline void *ahash_request_ctx(struct ahash_request
*req
)
128 static inline int crypto_ahash_setkey(struct crypto_ahash
*tfm
,
129 const u8
*key
, unsigned int keylen
)
131 struct ahash_tfm
*crt
= crypto_ahash_crt(tfm
);
133 return crt
->setkey(tfm
, key
, keylen
);
136 static inline int crypto_ahash_digest(struct ahash_request
*req
)
138 struct ahash_tfm
*crt
= crypto_ahash_crt(crypto_ahash_reqtfm(req
));
139 return crt
->digest(req
);
142 static inline void crypto_ahash_export(struct ahash_request
*req
, u8
*out
)
144 memcpy(out
, ahash_request_ctx(req
),
145 crypto_ahash_reqsize(crypto_ahash_reqtfm(req
)));
148 int crypto_ahash_import(struct ahash_request
*req
, const u8
*in
);
150 static inline int crypto_ahash_init(struct ahash_request
*req
)
152 struct ahash_tfm
*crt
= crypto_ahash_crt(crypto_ahash_reqtfm(req
));
153 return crt
->init(req
);
156 static inline int crypto_ahash_update(struct ahash_request
*req
)
158 struct ahash_tfm
*crt
= crypto_ahash_crt(crypto_ahash_reqtfm(req
));
159 return crt
->update(req
);
162 static inline int crypto_ahash_final(struct ahash_request
*req
)
164 struct ahash_tfm
*crt
= crypto_ahash_crt(crypto_ahash_reqtfm(req
));
165 return crt
->final(req
);
168 static inline void ahash_request_set_tfm(struct ahash_request
*req
,
169 struct crypto_ahash
*tfm
)
171 req
->base
.tfm
= crypto_ahash_tfm(tfm
);
174 static inline struct ahash_request
*ahash_request_alloc(
175 struct crypto_ahash
*tfm
, gfp_t gfp
)
177 struct ahash_request
*req
;
179 req
= kmalloc(sizeof(struct ahash_request
) +
180 crypto_ahash_reqsize(tfm
), gfp
);
183 ahash_request_set_tfm(req
, tfm
);
188 static inline void ahash_request_free(struct ahash_request
*req
)
193 static inline struct ahash_request
*ahash_request_cast(
194 struct crypto_async_request
*req
)
196 return container_of(req
, struct ahash_request
, base
);
199 static inline void ahash_request_set_callback(struct ahash_request
*req
,
201 crypto_completion_t complete
,
204 req
->base
.complete
= complete
;
205 req
->base
.data
= data
;
206 req
->base
.flags
= flags
;
209 static inline void ahash_request_set_crypt(struct ahash_request
*req
,
210 struct scatterlist
*src
, u8
*result
,
214 req
->nbytes
= nbytes
;
215 req
->result
= result
;
218 struct crypto_shash
*crypto_alloc_shash(const char *alg_name
, u32 type
,
221 static inline struct crypto_tfm
*crypto_shash_tfm(struct crypto_shash
*tfm
)
226 static inline void crypto_free_shash(struct crypto_shash
*tfm
)
228 crypto_destroy_tfm(tfm
, crypto_shash_tfm(tfm
));
231 static inline unsigned int crypto_shash_alignmask(
232 struct crypto_shash
*tfm
)
234 return crypto_tfm_alg_alignmask(crypto_shash_tfm(tfm
));
237 static inline unsigned int crypto_shash_blocksize(struct crypto_shash
*tfm
)
239 return crypto_tfm_alg_blocksize(crypto_shash_tfm(tfm
));
242 static inline struct shash_alg
*__crypto_shash_alg(struct crypto_alg
*alg
)
244 return container_of(alg
, struct shash_alg
, base
);
247 static inline struct shash_alg
*crypto_shash_alg(struct crypto_shash
*tfm
)
249 return __crypto_shash_alg(crypto_shash_tfm(tfm
)->__crt_alg
);
252 static inline unsigned int crypto_shash_digestsize(struct crypto_shash
*tfm
)
254 return crypto_shash_alg(tfm
)->digestsize
;
257 static inline unsigned int crypto_shash_statesize(struct crypto_shash
*tfm
)
259 return crypto_shash_alg(tfm
)->statesize
;
262 static inline u32
crypto_shash_get_flags(struct crypto_shash
*tfm
)
264 return crypto_tfm_get_flags(crypto_shash_tfm(tfm
));
267 static inline void crypto_shash_set_flags(struct crypto_shash
*tfm
, u32 flags
)
269 crypto_tfm_set_flags(crypto_shash_tfm(tfm
), flags
);
272 static inline void crypto_shash_clear_flags(struct crypto_shash
*tfm
, u32 flags
)
274 crypto_tfm_clear_flags(crypto_shash_tfm(tfm
), flags
);
277 static inline unsigned int crypto_shash_descsize(struct crypto_shash
*tfm
)
279 return tfm
->descsize
;
282 static inline void *shash_desc_ctx(struct shash_desc
*desc
)
287 int crypto_shash_setkey(struct crypto_shash
*tfm
, const u8
*key
,
288 unsigned int keylen
);
289 int crypto_shash_digest(struct shash_desc
*desc
, const u8
*data
,
290 unsigned int len
, u8
*out
);
292 static inline int crypto_shash_export(struct shash_desc
*desc
, void *out
)
294 return crypto_shash_alg(desc
->tfm
)->export(desc
, out
);
297 static inline int crypto_shash_import(struct shash_desc
*desc
, const void *in
)
299 return crypto_shash_alg(desc
->tfm
)->import(desc
, in
);
302 static inline int crypto_shash_init(struct shash_desc
*desc
)
304 return crypto_shash_alg(desc
->tfm
)->init(desc
);
307 int crypto_shash_update(struct shash_desc
*desc
, const u8
*data
,
309 int crypto_shash_final(struct shash_desc
*desc
, u8
*out
);
310 int crypto_shash_finup(struct shash_desc
*desc
, const u8
*data
,
311 unsigned int len
, u8
*out
);
313 #endif /* _CRYPTO_HASH_H */