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,
92 unsigned int digestsize;
94 struct crypto_tfm base;
98 unsigned int descsize;
99 struct crypto_tfm base;
102 static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm)
104 return container_of(tfm, struct crypto_ahash, base);
107 struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, u32 type,
110 static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm)
115 static inline void crypto_free_ahash(struct crypto_ahash *tfm)
117 crypto_destroy_tfm(tfm, crypto_ahash_tfm(tfm));
120 static inline unsigned int crypto_ahash_alignmask(
121 struct crypto_ahash *tfm)
123 return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm));
126 static inline struct hash_alg_common *__crypto_hash_alg_common(
127 struct crypto_alg *alg)
129 return container_of(alg, struct hash_alg_common, base);
132 static inline struct hash_alg_common *crypto_hash_alg_common(
133 struct crypto_ahash *tfm)
135 return __crypto_hash_alg_common(crypto_ahash_tfm(tfm)->__crt_alg);
138 static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm)
140 return tfm->digestsize;
143 static inline unsigned int crypto_ahash_statesize(struct crypto_ahash *tfm)
145 return crypto_hash_alg_common(tfm)->statesize;
148 static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm)
150 return crypto_tfm_get_flags(crypto_ahash_tfm(tfm));
153 static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags)
155 crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags);
158 static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags)
160 crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags);
163 static inline struct crypto_ahash *crypto_ahash_reqtfm(
164 struct ahash_request *req)
166 return __crypto_ahash_cast(req->base.tfm);
169 static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm)
174 static inline void *ahash_request_ctx(struct ahash_request *req)
179 static inline int crypto_ahash_setkey(struct crypto_ahash *tfm,
180 const u8 *key, unsigned int keylen)
182 return tfm->setkey(tfm, key, keylen);
185 static inline int crypto_ahash_digest(struct ahash_request *req)
187 return crypto_ahash_reqtfm(req)->digest(req);
190 static inline int crypto_ahash_export(struct ahash_request *req, void *out)
192 return crypto_ahash_reqtfm(req)->export(req, out);
195 static inline int crypto_ahash_import(struct ahash_request *req, const void *in)
197 return crypto_ahash_reqtfm(req)->import(req, in);
200 static inline int crypto_ahash_init(struct ahash_request *req)
202 return crypto_ahash_reqtfm(req)->init(req);
205 static inline int crypto_ahash_update(struct ahash_request *req)
207 return crypto_ahash_reqtfm(req)->update(req);
210 static inline int crypto_ahash_final(struct ahash_request *req)
212 return crypto_ahash_reqtfm(req)->final(req);
215 static inline void ahash_request_set_tfm(struct ahash_request *req,
216 struct crypto_ahash *tfm)
218 req->base.tfm = crypto_ahash_tfm(tfm);
221 static inline struct ahash_request *ahash_request_alloc(
222 struct crypto_ahash *tfm, gfp_t gfp)
224 struct ahash_request *req;
226 req = kmalloc(sizeof(struct ahash_request) +
227 crypto_ahash_reqsize(tfm), gfp);
230 ahash_request_set_tfm(req, tfm);
235 static inline void ahash_request_free(struct ahash_request *req)
240 static inline struct ahash_request *ahash_request_cast(
241 struct crypto_async_request *req)
243 return container_of(req, struct ahash_request, base);
246 static inline void ahash_request_set_callback(struct ahash_request *req,
248 crypto_completion_t complete,
251 req->base.complete = complete;
252 req->base.data = data;
253 req->base.flags = flags;
256 static inline void ahash_request_set_crypt(struct ahash_request *req,
257 struct scatterlist *src, u8 *result,
261 req->nbytes = nbytes;
262 req->result = result;
265 struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
268 static inline struct crypto_tfm *crypto_shash_tfm(struct crypto_shash *tfm)
273 static inline void crypto_free_shash(struct crypto_shash *tfm)
275 crypto_destroy_tfm(tfm, crypto_shash_tfm(tfm));
278 static inline unsigned int crypto_shash_alignmask(
279 struct crypto_shash *tfm)
281 return crypto_tfm_alg_alignmask(crypto_shash_tfm(tfm));
284 static inline unsigned int crypto_shash_blocksize(struct crypto_shash *tfm)
286 return crypto_tfm_alg_blocksize(crypto_shash_tfm(tfm));
289 static inline struct shash_alg *__crypto_shash_alg(struct crypto_alg *alg)
291 return container_of(alg, struct shash_alg, base);
294 static inline struct shash_alg *crypto_shash_alg(struct crypto_shash *tfm)
296 return __crypto_shash_alg(crypto_shash_tfm(tfm)->__crt_alg);
299 static inline unsigned int crypto_shash_digestsize(struct crypto_shash *tfm)
301 return crypto_shash_alg(tfm)->digestsize;
304 static inline unsigned int crypto_shash_statesize(struct crypto_shash *tfm)
306 return crypto_shash_alg(tfm)->statesize;
309 static inline u32 crypto_shash_get_flags(struct crypto_shash *tfm)
311 return crypto_tfm_get_flags(crypto_shash_tfm(tfm));
314 static inline void crypto_shash_set_flags(struct crypto_shash *tfm, u32 flags)
316 crypto_tfm_set_flags(crypto_shash_tfm(tfm), flags);
319 static inline void crypto_shash_clear_flags(struct crypto_shash *tfm, u32 flags)
321 crypto_tfm_clear_flags(crypto_shash_tfm(tfm), flags);
324 static inline unsigned int crypto_shash_descsize(struct crypto_shash *tfm)
326 return tfm->descsize;
329 static inline void *shash_desc_ctx(struct shash_desc *desc)
334 int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key,
335 unsigned int keylen);
336 int crypto_shash_digest(struct shash_desc *desc, const u8 *data,
337 unsigned int len, u8 *out);
339 static inline int crypto_shash_export(struct shash_desc *desc, void *out)
341 return crypto_shash_alg(desc->tfm)->export(desc, out);
344 static inline int crypto_shash_import(struct shash_desc *desc, const void *in)
346 return crypto_shash_alg(desc->tfm)->import(desc, in);
349 static inline int crypto_shash_init(struct shash_desc *desc)
351 return crypto_shash_alg(desc->tfm)->init(desc);
354 int crypto_shash_update(struct shash_desc *desc, const u8 *data,
356 int crypto_shash_final(struct shash_desc *desc, u8 *out);
357 int crypto_shash_finup(struct shash_desc *desc, const u8 *data,
358 unsigned int len, u8 *out);
360 #endif /* _CRYPTO_HASH_H */