08bdffafefad24bd7b05d2476aab07e3f652631d
[linux-2.6.git] / 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
19 struct ahash_request;
20 struct scatterlist;
21
22 struct 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
37 struct shash_instance {
38         struct shash_alg alg;
39 };
40
41 struct crypto_shash_spawn {
42         struct crypto_spawn base;
43 };
44
45 extern const struct crypto_type crypto_ahash_type;
46
47 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
48 int crypto_hash_walk_first(struct ahash_request *req,
49                            struct crypto_hash_walk *walk);
50 int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
51                                   struct crypto_hash_walk *walk,
52                                   struct scatterlist *sg, unsigned int len);
53
54 int crypto_register_ahash(struct ahash_alg *alg);
55 int crypto_unregister_ahash(struct ahash_alg *alg);
56
57 int crypto_register_shash(struct shash_alg *alg);
58 int crypto_unregister_shash(struct shash_alg *alg);
59 int shash_register_instance(struct crypto_template *tmpl,
60                             struct shash_instance *inst);
61 void shash_free_instance(struct crypto_instance *inst);
62
63 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
64                             struct shash_alg *alg,
65                             struct crypto_instance *inst);
66
67 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
68
69 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
70 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
71
72 int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
73
74 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
75 {
76         return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
77 }
78
79 static inline struct old_ahash_alg *crypto_old_ahash_alg(
80         struct crypto_ahash *tfm)
81 {
82         return &crypto_ahash_tfm(tfm)->__crt_alg->cra_ahash;
83 }
84
85 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
86                                             unsigned int reqsize)
87 {
88         tfm->reqsize = reqsize;
89 }
90
91 static inline int ahash_enqueue_request(struct crypto_queue *queue,
92                                              struct ahash_request *request)
93 {
94         return crypto_enqueue_request(queue, &request->base);
95 }
96
97 static inline struct ahash_request *ahash_dequeue_request(
98         struct crypto_queue *queue)
99 {
100         return ahash_request_cast(crypto_dequeue_request(queue));
101 }
102
103 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
104                                           struct crypto_ahash *tfm)
105 {
106         return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
107 }
108
109 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
110 {
111         return crypto_tfm_ctx(&tfm->base);
112 }
113
114 static inline struct crypto_instance *shash_crypto_instance(
115         struct shash_instance *inst)
116 {
117         return container_of(&inst->alg.base, struct crypto_instance, alg);
118 }
119
120 static inline struct shash_instance *shash_instance(
121         struct crypto_instance *inst)
122 {
123         return container_of(__crypto_shash_alg(&inst->alg),
124                             struct shash_instance, alg);
125 }
126
127 static inline void *shash_instance_ctx(struct shash_instance *inst)
128 {
129         return crypto_instance_ctx(shash_crypto_instance(inst));
130 }
131
132 static inline struct shash_instance *shash_alloc_instance(
133         const char *name, struct crypto_alg *alg)
134 {
135         return crypto_alloc_instance2(name, alg,
136                                       sizeof(struct shash_alg) - sizeof(*alg));
137 }
138
139 static inline struct crypto_shash *crypto_spawn_shash(
140         struct crypto_shash_spawn *spawn)
141 {
142         return crypto_spawn_tfm2(&spawn->base);
143 }
144
145 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
146 {
147         return crypto_tfm_ctx_aligned(&tfm->base);
148 }
149
150 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
151 {
152         return container_of(tfm, struct crypto_shash, base);
153 }
154
155 #endif  /* _CRYPTO_INTERNAL_HASH_H */
156