Root/include/crypto/internal/hash.h

1/*
2 * Hash algorithms.
3 *
4 * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
5 *
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.
10 *
11 */
12
13#ifndef _CRYPTO_INTERNAL_HASH_H
14#define _CRYPTO_INTERNAL_HASH_H
15
16#include <crypto/algapi.h>
17#include <crypto/hash.h>
18
19struct ahash_request;
20struct scatterlist;
21
22struct crypto_hash_walk {
23    char *data;
24
25    unsigned int offset;
26    unsigned int alignmask;
27
28    struct page *pg;
29    unsigned int entrylen;
30
31    unsigned int total;
32    struct scatterlist *sg;
33
34    unsigned int flags;
35};
36
37struct ahash_instance {
38    struct ahash_alg alg;
39};
40
41struct shash_instance {
42    struct shash_alg alg;
43};
44
45struct crypto_ahash_spawn {
46    struct crypto_spawn base;
47};
48
49struct crypto_shash_spawn {
50    struct crypto_spawn base;
51};
52
53extern const struct crypto_type crypto_ahash_type;
54
55int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
56int crypto_hash_walk_first(struct ahash_request *req,
57               struct crypto_hash_walk *walk);
58int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
59                  struct crypto_hash_walk *walk,
60                  struct scatterlist *sg, unsigned int len);
61
62static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
63{
64    return !(walk->entrylen | walk->total);
65}
66
67int crypto_register_ahash(struct ahash_alg *alg);
68int crypto_unregister_ahash(struct ahash_alg *alg);
69int ahash_register_instance(struct crypto_template *tmpl,
70                struct ahash_instance *inst);
71void ahash_free_instance(struct crypto_instance *inst);
72
73int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
74                struct hash_alg_common *alg,
75                struct crypto_instance *inst);
76
77static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
78{
79    crypto_drop_spawn(&spawn->base);
80}
81
82struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
83
84int crypto_register_shash(struct shash_alg *alg);
85int crypto_unregister_shash(struct shash_alg *alg);
86int crypto_register_shashes(struct shash_alg *algs, int count);
87int crypto_unregister_shashes(struct shash_alg *algs, int count);
88int shash_register_instance(struct crypto_template *tmpl,
89                struct shash_instance *inst);
90void shash_free_instance(struct crypto_instance *inst);
91
92int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
93                struct shash_alg *alg,
94                struct crypto_instance *inst);
95
96static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
97{
98    crypto_drop_spawn(&spawn->base);
99}
100
101struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
102
103int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
104int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
105int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
106
107int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
108
109static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
110{
111    return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
112}
113
114static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
115{
116    return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
117                halg);
118}
119
120static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
121                        unsigned int reqsize)
122{
123    tfm->reqsize = reqsize;
124}
125
126static inline struct crypto_instance *ahash_crypto_instance(
127    struct ahash_instance *inst)
128{
129    return container_of(&inst->alg.halg.base, struct crypto_instance, alg);
130}
131
132static inline struct ahash_instance *ahash_instance(
133    struct crypto_instance *inst)
134{
135    return container_of(&inst->alg, struct ahash_instance, alg.halg.base);
136}
137
138static inline void *ahash_instance_ctx(struct ahash_instance *inst)
139{
140    return crypto_instance_ctx(ahash_crypto_instance(inst));
141}
142
143static inline unsigned int ahash_instance_headroom(void)
144{
145    return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);
146}
147
148static inline struct ahash_instance *ahash_alloc_instance(
149    const char *name, struct crypto_alg *alg)
150{
151    return crypto_alloc_instance2(name, alg, ahash_instance_headroom());
152}
153
154static inline struct crypto_ahash *crypto_spawn_ahash(
155    struct crypto_ahash_spawn *spawn)
156{
157    return crypto_spawn_tfm2(&spawn->base);
158}
159
160static inline int ahash_enqueue_request(struct crypto_queue *queue,
161                         struct ahash_request *request)
162{
163    return crypto_enqueue_request(queue, &request->base);
164}
165
166static inline struct ahash_request *ahash_dequeue_request(
167    struct crypto_queue *queue)
168{
169    return ahash_request_cast(crypto_dequeue_request(queue));
170}
171
172static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
173                      struct crypto_ahash *tfm)
174{
175    return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
176}
177
178static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
179{
180    return crypto_tfm_ctx(&tfm->base);
181}
182
183static inline struct crypto_instance *shash_crypto_instance(
184    struct shash_instance *inst)
185{
186    return container_of(&inst->alg.base, struct crypto_instance, alg);
187}
188
189static inline struct shash_instance *shash_instance(
190    struct crypto_instance *inst)
191{
192    return container_of(__crypto_shash_alg(&inst->alg),
193                struct shash_instance, alg);
194}
195
196static inline void *shash_instance_ctx(struct shash_instance *inst)
197{
198    return crypto_instance_ctx(shash_crypto_instance(inst));
199}
200
201static inline struct shash_instance *shash_alloc_instance(
202    const char *name, struct crypto_alg *alg)
203{
204    return crypto_alloc_instance2(name, alg,
205                      sizeof(struct shash_alg) - sizeof(*alg));
206}
207
208static inline struct crypto_shash *crypto_spawn_shash(
209    struct crypto_shash_spawn *spawn)
210{
211    return crypto_spawn_tfm2(&spawn->base);
212}
213
214static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
215{
216    return crypto_tfm_ctx_aligned(&tfm->base);
217}
218
219static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
220{
221    return container_of(tfm, struct crypto_shash, base);
222}
223
224#endif /* _CRYPTO_INTERNAL_HASH_H */
225
226

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