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[linux-2.6/next.git] / include / crypto / internal / hash.h
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1 /*
2 * Hash algorithms.
3 *
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)
9 * any later version.
13 #ifndef _CRYPTO_INTERNAL_HASH_H
14 #define _CRYPTO_INTERNAL_HASH_H
16 #include <crypto/algapi.h>
17 #include <crypto/hash.h>
19 struct ahash_request;
20 struct scatterlist;
22 struct crypto_hash_walk {
23 char *data;
25 unsigned int offset;
26 unsigned int alignmask;
28 struct page *pg;
29 unsigned int entrylen;
31 unsigned int total;
32 struct scatterlist *sg;
34 unsigned int flags;
37 struct ahash_instance {
38 struct ahash_alg alg;
41 struct shash_instance {
42 struct shash_alg alg;
45 struct crypto_ahash_spawn {
46 struct crypto_spawn base;
49 struct crypto_shash_spawn {
50 struct crypto_spawn base;
53 extern const struct crypto_type crypto_ahash_type;
55 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
56 int crypto_hash_walk_first(struct ahash_request *req,
57 struct crypto_hash_walk *walk);
58 int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
59 struct crypto_hash_walk *walk,
60 struct scatterlist *sg, unsigned int len);
62 static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
64 return !(walk->entrylen | walk->total);
67 int crypto_register_ahash(struct ahash_alg *alg);
68 int crypto_unregister_ahash(struct ahash_alg *alg);
69 int ahash_register_instance(struct crypto_template *tmpl,
70 struct ahash_instance *inst);
71 void ahash_free_instance(struct crypto_instance *inst);
73 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
74 struct hash_alg_common *alg,
75 struct crypto_instance *inst);
77 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
79 crypto_drop_spawn(&spawn->base);
82 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
84 int crypto_register_shash(struct shash_alg *alg);
85 int crypto_unregister_shash(struct shash_alg *alg);
86 int shash_register_instance(struct crypto_template *tmpl,
87 struct shash_instance *inst);
88 void shash_free_instance(struct crypto_instance *inst);
90 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
91 struct shash_alg *alg,
92 struct crypto_instance *inst);
94 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
96 crypto_drop_spawn(&spawn->base);
99 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
101 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
102 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
103 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
105 int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
107 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
109 return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
112 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
114 return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
115 halg);
118 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
119 unsigned int reqsize)
121 tfm->reqsize = reqsize;
124 static inline struct crypto_instance *ahash_crypto_instance(
125 struct ahash_instance *inst)
127 return container_of(&inst->alg.halg.base, struct crypto_instance, alg);
130 static inline struct ahash_instance *ahash_instance(
131 struct crypto_instance *inst)
133 return container_of(&inst->alg, struct ahash_instance, alg.halg.base);
136 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
138 return crypto_instance_ctx(ahash_crypto_instance(inst));
141 static inline unsigned int ahash_instance_headroom(void)
143 return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);
146 static inline struct ahash_instance *ahash_alloc_instance(
147 const char *name, struct crypto_alg *alg)
149 return crypto_alloc_instance2(name, alg, ahash_instance_headroom());
152 static inline struct crypto_ahash *crypto_spawn_ahash(
153 struct crypto_ahash_spawn *spawn)
155 return crypto_spawn_tfm2(&spawn->base);
158 static inline int ahash_enqueue_request(struct crypto_queue *queue,
159 struct ahash_request *request)
161 return crypto_enqueue_request(queue, &request->base);
164 static inline struct ahash_request *ahash_dequeue_request(
165 struct crypto_queue *queue)
167 return ahash_request_cast(crypto_dequeue_request(queue));
170 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
171 struct crypto_ahash *tfm)
173 return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
176 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
178 return crypto_tfm_ctx(&tfm->base);
181 static inline struct crypto_instance *shash_crypto_instance(
182 struct shash_instance *inst)
184 return container_of(&inst->alg.base, struct crypto_instance, alg);
187 static inline struct shash_instance *shash_instance(
188 struct crypto_instance *inst)
190 return container_of(__crypto_shash_alg(&inst->alg),
191 struct shash_instance, alg);
194 static inline void *shash_instance_ctx(struct shash_instance *inst)
196 return crypto_instance_ctx(shash_crypto_instance(inst));
199 static inline struct shash_instance *shash_alloc_instance(
200 const char *name, struct crypto_alg *alg)
202 return crypto_alloc_instance2(name, alg,
203 sizeof(struct shash_alg) - sizeof(*alg));
206 static inline struct crypto_shash *crypto_spawn_shash(
207 struct crypto_shash_spawn *spawn)
209 return crypto_spawn_tfm2(&spawn->base);
212 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
214 return crypto_tfm_ctx_aligned(&tfm->base);
217 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
219 return container_of(tfm, struct crypto_shash, base);
222 #endif /* _CRYPTO_INTERNAL_HASH_H */