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 void *__ctx[] CRYPTO_MINALIGN_ATTR;
38 int (*init)(struct ahash_request *req);
39 int (*update)(struct ahash_request *req);
40 int (*final)(struct ahash_request *req);
41 int (*finup)(struct ahash_request *req);
42 int (*digest)(struct ahash_request *req);
43 int (*export)(struct ahash_request *req, void *out);
44 int (*import)(struct ahash_request *req, const void *in);
45 int (*setkey)(struct crypto_ahash *tfm, const u8 *key,
48 struct hash_alg_common halg;
52 struct crypto_shash *tfm;
55 void *__ctx[] CRYPTO_MINALIGN_ATTR;
59 int (*init)(struct shash_desc *desc);
60 int (*update)(struct shash_desc *desc, const u8 *data,
62 int (*final)(struct shash_desc *desc, u8 *out);
63 int (*finup)(struct shash_desc *desc, const u8 *data,
64 unsigned int len, u8 *out);
65 int (*digest)(struct shash_desc *desc, const u8 *data,
66 unsigned int len, u8 *out);
67 int (*export)(struct shash_desc *desc, void *out);
68 int (*import)(struct shash_desc *desc, const void *in);
69 int (*setkey)(struct crypto_shash *tfm, const u8 *key,
72 unsigned int descsize;
74 /* These fields must match hash_alg_common. */
75 unsigned int digestsize;
76 unsigned int statesize;
78 struct crypto_alg base;
82 int (*init)(struct ahash_request *req);
83 int (*update)(struct ahash_request *req);
84 int (*final)(struct ahash_request *req);
85 int (*finup)(struct ahash_request *req);
86 int (*digest)(struct ahash_request *req);
87 int (*export)(struct ahash_request *req, void *out);
88 int (*import)(struct ahash_request *req, const void *in);
89 int (*setkey)(struct crypto_ahash *tfm, const u8 *key,
93 struct crypto_tfm base;
97 unsigned int descsize;
98 struct crypto_tfm base;
101 static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm)
103 return container_of(tfm, struct crypto_ahash, base);
106 struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, u32 type,
109 static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm)
114 static inline void crypto_free_ahash(struct crypto_ahash *tfm)
116 crypto_destroy_tfm(tfm, crypto_ahash_tfm(tfm));
119 static inline unsigned int crypto_ahash_alignmask(
120 struct crypto_ahash *tfm)
122 return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm));
125 static inline struct hash_alg_common *__crypto_hash_alg_common(
126 struct crypto_alg *alg)
128 return container_of(alg, struct hash_alg_common, base);
131 static inline struct hash_alg_common *crypto_hash_alg_common(
132 struct crypto_ahash *tfm)
134 return __crypto_hash_alg_common(crypto_ahash_tfm(tfm)->__crt_alg);
137 static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm)
139 return crypto_hash_alg_common(tfm)->digestsize;
142 static inline unsigned int crypto_ahash_statesize(struct crypto_ahash *tfm)
144 return crypto_hash_alg_common(tfm)->statesize;
147 static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm)
149 return crypto_tfm_get_flags(crypto_ahash_tfm(tfm));
152 static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags)
154 crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags);
157 static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags)
159 crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags);
162 static inline struct crypto_ahash *crypto_ahash_reqtfm(
163 struct ahash_request *req)
165 return __crypto_ahash_cast(req->base.tfm);
168 static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm)
173 static inline void *ahash_request_ctx(struct ahash_request *req)
178 static inline int crypto_ahash_setkey(struct crypto_ahash *tfm,
179 const u8 *key, unsigned int keylen)
181 return tfm->setkey(tfm, key, keylen);
184 static inline int crypto_ahash_digest(struct ahash_request *req)
186 return crypto_ahash_reqtfm(req)->digest(req);
189 static inline int crypto_ahash_export(struct ahash_request *req, void *out)
191 return crypto_ahash_reqtfm(req)->export(req, out);
194 static inline int crypto_ahash_import(struct ahash_request *req, const void *in)
196 return crypto_ahash_reqtfm(req)->import(req, in);
199 static inline int crypto_ahash_init(struct ahash_request *req)
201 return crypto_ahash_reqtfm(req)->init(req);
204 static inline int crypto_ahash_update(struct ahash_request *req)
206 return crypto_ahash_reqtfm(req)->update(req);
209 static inline int crypto_ahash_final(struct ahash_request *req)
211 return crypto_ahash_reqtfm(req)->final(req);
214 static inline void ahash_request_set_tfm(struct ahash_request *req,
215 struct crypto_ahash *tfm)
217 req->base.tfm = crypto_ahash_tfm(tfm);
220 static inline struct ahash_request *ahash_request_alloc(
221 struct crypto_ahash *tfm, gfp_t gfp)
223 struct ahash_request *req;
225 req = kmalloc(sizeof(struct ahash_request) +
226 crypto_ahash_reqsize(tfm), gfp);
229 ahash_request_set_tfm(req, tfm);
234 static inline void ahash_request_free(struct ahash_request *req)
239 static inline struct ahash_request *ahash_request_cast(
240 struct crypto_async_request *req)
242 return container_of(req, struct ahash_request, base);
245 static inline void ahash_request_set_callback(struct ahash_request *req,
247 crypto_completion_t complete,
250 req->base.complete = complete;
251 req->base.data = data;
252 req->base.flags = flags;
255 static inline void ahash_request_set_crypt(struct ahash_request *req,
256 struct scatterlist *src, u8 *result,
260 req->nbytes = nbytes;
261 req->result = result;
264 struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
267 static inline struct crypto_tfm *crypto_shash_tfm(struct crypto_shash *tfm)
272 static inline void crypto_free_shash(struct crypto_shash *tfm)
274 crypto_destroy_tfm(tfm, crypto_shash_tfm(tfm));
277 static inline unsigned int crypto_shash_alignmask(
278 struct crypto_shash *tfm)
280 return crypto_tfm_alg_alignmask(crypto_shash_tfm(tfm));
283 static inline unsigned int crypto_shash_blocksize(struct crypto_shash *tfm)
285 return crypto_tfm_alg_blocksize(crypto_shash_tfm(tfm));
288 static inline struct shash_alg *__crypto_shash_alg(struct crypto_alg *alg)
290 return container_of(alg, struct shash_alg, base);
293 static inline struct shash_alg *crypto_shash_alg(struct crypto_shash *tfm)
295 return __crypto_shash_alg(crypto_shash_tfm(tfm)->__crt_alg);
298 static inline unsigned int crypto_shash_digestsize(struct crypto_shash *tfm)
300 return crypto_shash_alg(tfm)->digestsize;
303 static inline unsigned int crypto_shash_statesize(struct crypto_shash *tfm)
305 return crypto_shash_alg(tfm)->statesize;
308 static inline u32 crypto_shash_get_flags(struct crypto_shash *tfm)
310 return crypto_tfm_get_flags(crypto_shash_tfm(tfm));
313 static inline void crypto_shash_set_flags(struct crypto_shash *tfm, u32 flags)
315 crypto_tfm_set_flags(crypto_shash_tfm(tfm), flags);
318 static inline void crypto_shash_clear_flags(struct crypto_shash *tfm, u32 flags)
320 crypto_tfm_clear_flags(crypto_shash_tfm(tfm), flags);
323 static inline unsigned int crypto_shash_descsize(struct crypto_shash *tfm)
325 return tfm->descsize;
328 static inline void *shash_desc_ctx(struct shash_desc *desc)
333 int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key,
334 unsigned int keylen);
335 int crypto_shash_digest(struct shash_desc *desc, const u8 *data,
336 unsigned int len, u8 *out);
338 static inline int crypto_shash_export(struct shash_desc *desc, void *out)
340 return crypto_shash_alg(desc->tfm)->export(desc, out);
343 static inline int crypto_shash_import(struct shash_desc *desc, const void *in)
345 return crypto_shash_alg(desc->tfm)->import(desc, in);
348 static inline int crypto_shash_init(struct shash_desc *desc)
350 return crypto_shash_alg(desc->tfm)->init(desc);
353 int crypto_shash_update(struct shash_desc *desc, const u8 *data,
355 int crypto_shash_final(struct shash_desc *desc, u8 *out);
356 int crypto_shash_finup(struct shash_desc *desc, const u8 *data,
357 unsigned int len, u8 *out);
359 #endif /* _CRYPTO_HASH_H */