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>
20 struct hash_alg_common
{
21 unsigned int digestsize
;
22 unsigned int statesize
;
24 struct crypto_alg base
;
27 struct ahash_request
{
28 struct crypto_async_request base
;
31 struct scatterlist
*src
;
34 /* This field may only be used by the ahash API code. */
37 void *__ctx
[] CRYPTO_MINALIGN_ATTR
;
41 int (*init
)(struct ahash_request
*req
);
42 int (*update
)(struct ahash_request
*req
);
43 int (*final
)(struct ahash_request
*req
);
44 int (*finup
)(struct ahash_request
*req
);
45 int (*digest
)(struct ahash_request
*req
);
46 int (*export
)(struct ahash_request
*req
, void *out
);
47 int (*import
)(struct ahash_request
*req
, const void *in
);
48 int (*setkey
)(struct crypto_ahash
*tfm
, const u8
*key
,
51 struct hash_alg_common halg
;
55 struct crypto_shash
*tfm
;
58 void *__ctx
[] CRYPTO_MINALIGN_ATTR
;
62 int (*init
)(struct shash_desc
*desc
);
63 int (*update
)(struct shash_desc
*desc
, const u8
*data
,
65 int (*final
)(struct shash_desc
*desc
, u8
*out
);
66 int (*finup
)(struct shash_desc
*desc
, const u8
*data
,
67 unsigned int len
, u8
*out
);
68 int (*digest
)(struct shash_desc
*desc
, const u8
*data
,
69 unsigned int len
, u8
*out
);
70 int (*export
)(struct shash_desc
*desc
, void *out
);
71 int (*import
)(struct shash_desc
*desc
, const void *in
);
72 int (*setkey
)(struct crypto_shash
*tfm
, const u8
*key
,
75 unsigned int descsize
;
77 /* These fields must match hash_alg_common. */
78 unsigned int digestsize
;
79 unsigned int statesize
;
81 struct crypto_alg base
;
85 int (*init
)(struct ahash_request
*req
);
86 int (*update
)(struct ahash_request
*req
);
87 int (*final
)(struct ahash_request
*req
);
88 int (*finup
)(struct ahash_request
*req
);
89 int (*digest
)(struct ahash_request
*req
);
90 int (*export
)(struct ahash_request
*req
, void *out
);
91 int (*import
)(struct ahash_request
*req
, const void *in
);
92 int (*setkey
)(struct crypto_ahash
*tfm
, const u8
*key
,
96 struct crypto_tfm base
;
100 unsigned int descsize
;
101 struct crypto_tfm base
;
104 static inline struct crypto_ahash
*__crypto_ahash_cast(struct crypto_tfm
*tfm
)
106 return container_of(tfm
, struct crypto_ahash
, base
);
109 struct crypto_ahash
*crypto_alloc_ahash(const char *alg_name
, u32 type
,
112 static inline struct crypto_tfm
*crypto_ahash_tfm(struct crypto_ahash
*tfm
)
117 static inline void crypto_free_ahash(struct crypto_ahash
*tfm
)
119 crypto_destroy_tfm(tfm
, crypto_ahash_tfm(tfm
));
122 static inline unsigned int crypto_ahash_alignmask(
123 struct crypto_ahash
*tfm
)
125 return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm
));
128 static inline struct hash_alg_common
*__crypto_hash_alg_common(
129 struct crypto_alg
*alg
)
131 return container_of(alg
, struct hash_alg_common
, base
);
134 static inline struct hash_alg_common
*crypto_hash_alg_common(
135 struct crypto_ahash
*tfm
)
137 return __crypto_hash_alg_common(crypto_ahash_tfm(tfm
)->__crt_alg
);
140 static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash
*tfm
)
142 return crypto_hash_alg_common(tfm
)->digestsize
;
145 static inline unsigned int crypto_ahash_statesize(struct crypto_ahash
*tfm
)
147 return crypto_hash_alg_common(tfm
)->statesize
;
150 static inline u32
crypto_ahash_get_flags(struct crypto_ahash
*tfm
)
152 return crypto_tfm_get_flags(crypto_ahash_tfm(tfm
));
155 static inline void crypto_ahash_set_flags(struct crypto_ahash
*tfm
, u32 flags
)
157 crypto_tfm_set_flags(crypto_ahash_tfm(tfm
), flags
);
160 static inline void crypto_ahash_clear_flags(struct crypto_ahash
*tfm
, u32 flags
)
162 crypto_tfm_clear_flags(crypto_ahash_tfm(tfm
), flags
);
165 static inline struct crypto_ahash
*crypto_ahash_reqtfm(
166 struct ahash_request
*req
)
168 return __crypto_ahash_cast(req
->base
.tfm
);
171 static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash
*tfm
)
176 static inline void *ahash_request_ctx(struct ahash_request
*req
)
181 int crypto_ahash_setkey(struct crypto_ahash
*tfm
, const u8
*key
,
182 unsigned int keylen
);
183 int crypto_ahash_finup(struct ahash_request
*req
);
184 int crypto_ahash_final(struct ahash_request
*req
);
185 int crypto_ahash_digest(struct ahash_request
*req
);
187 static inline int crypto_ahash_export(struct ahash_request
*req
, void *out
)
189 return crypto_ahash_reqtfm(req
)->export(req
, out
);
192 static inline int crypto_ahash_import(struct ahash_request
*req
, const void *in
)
194 return crypto_ahash_reqtfm(req
)->import(req
, in
);
197 static inline int crypto_ahash_init(struct ahash_request
*req
)
199 return crypto_ahash_reqtfm(req
)->init(req
);
202 static inline int crypto_ahash_update(struct ahash_request
*req
)
204 return crypto_ahash_reqtfm(req
)->update(req
);
207 static inline void ahash_request_set_tfm(struct ahash_request
*req
,
208 struct crypto_ahash
*tfm
)
210 req
->base
.tfm
= crypto_ahash_tfm(tfm
);
213 static inline struct ahash_request
*ahash_request_alloc(
214 struct crypto_ahash
*tfm
, gfp_t gfp
)
216 struct ahash_request
*req
;
218 req
= kmalloc(sizeof(struct ahash_request
) +
219 crypto_ahash_reqsize(tfm
), gfp
);
222 ahash_request_set_tfm(req
, tfm
);
227 static inline void ahash_request_free(struct ahash_request
*req
)
232 static inline struct ahash_request
*ahash_request_cast(
233 struct crypto_async_request
*req
)
235 return container_of(req
, struct ahash_request
, base
);
238 static inline void ahash_request_set_callback(struct ahash_request
*req
,
240 crypto_completion_t complete
,
243 req
->base
.complete
= complete
;
244 req
->base
.data
= data
;
245 req
->base
.flags
= flags
;
248 static inline void ahash_request_set_crypt(struct ahash_request
*req
,
249 struct scatterlist
*src
, u8
*result
,
253 req
->nbytes
= nbytes
;
254 req
->result
= result
;
257 struct crypto_shash
*crypto_alloc_shash(const char *alg_name
, u32 type
,
260 static inline struct crypto_tfm
*crypto_shash_tfm(struct crypto_shash
*tfm
)
265 static inline void crypto_free_shash(struct crypto_shash
*tfm
)
267 crypto_destroy_tfm(tfm
, crypto_shash_tfm(tfm
));
270 static inline unsigned int crypto_shash_alignmask(
271 struct crypto_shash
*tfm
)
273 return crypto_tfm_alg_alignmask(crypto_shash_tfm(tfm
));
276 static inline unsigned int crypto_shash_blocksize(struct crypto_shash
*tfm
)
278 return crypto_tfm_alg_blocksize(crypto_shash_tfm(tfm
));
281 static inline struct shash_alg
*__crypto_shash_alg(struct crypto_alg
*alg
)
283 return container_of(alg
, struct shash_alg
, base
);
286 static inline struct shash_alg
*crypto_shash_alg(struct crypto_shash
*tfm
)
288 return __crypto_shash_alg(crypto_shash_tfm(tfm
)->__crt_alg
);
291 static inline unsigned int crypto_shash_digestsize(struct crypto_shash
*tfm
)
293 return crypto_shash_alg(tfm
)->digestsize
;
296 static inline unsigned int crypto_shash_statesize(struct crypto_shash
*tfm
)
298 return crypto_shash_alg(tfm
)->statesize
;
301 static inline u32
crypto_shash_get_flags(struct crypto_shash
*tfm
)
303 return crypto_tfm_get_flags(crypto_shash_tfm(tfm
));
306 static inline void crypto_shash_set_flags(struct crypto_shash
*tfm
, u32 flags
)
308 crypto_tfm_set_flags(crypto_shash_tfm(tfm
), flags
);
311 static inline void crypto_shash_clear_flags(struct crypto_shash
*tfm
, u32 flags
)
313 crypto_tfm_clear_flags(crypto_shash_tfm(tfm
), flags
);
316 static inline unsigned int crypto_shash_descsize(struct crypto_shash
*tfm
)
318 return tfm
->descsize
;
321 static inline void *shash_desc_ctx(struct shash_desc
*desc
)
326 int crypto_shash_setkey(struct crypto_shash
*tfm
, const u8
*key
,
327 unsigned int keylen
);
328 int crypto_shash_digest(struct shash_desc
*desc
, const u8
*data
,
329 unsigned int len
, u8
*out
);
331 static inline int crypto_shash_export(struct shash_desc
*desc
, void *out
)
333 return crypto_shash_alg(desc
->tfm
)->export(desc
, out
);
336 static inline int crypto_shash_import(struct shash_desc
*desc
, const void *in
)
338 return crypto_shash_alg(desc
->tfm
)->import(desc
, in
);
341 static inline int crypto_shash_init(struct shash_desc
*desc
)
343 return crypto_shash_alg(desc
->tfm
)->init(desc
);
346 int crypto_shash_update(struct shash_desc
*desc
, const u8
*data
,
348 int crypto_shash_final(struct shash_desc
*desc
, u8
*out
);
349 int crypto_shash_finup(struct shash_desc
*desc
, const u8
*data
,
350 unsigned int len
, u8
*out
);
352 #endif /* _CRYPTO_HASH_H */