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 */