crypto: shash - Add spawn support
[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_shash(struct shash_alg *alg);
55 int crypto_unregister_shash(struct shash_alg *alg);
56
57 void shash_free_instance(struct crypto_instance *inst);
58
59 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
60                             struct shash_alg *alg,
61                             struct crypto_instance *inst);
62
63 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
64 {
65         return crypto_tfm_ctx(&tfm->base);
66 }
67
68 static inline struct ahash_alg *crypto_ahash_alg(
69         struct crypto_ahash *tfm)
70 {
71         return &crypto_ahash_tfm(tfm)->__crt_alg->cra_ahash;
72 }
73
74 static inline int ahash_enqueue_request(struct crypto_queue *queue,
75                                              struct ahash_request *request)
76 {
77         return crypto_enqueue_request(queue, &request->base);
78 }
79
80 static inline struct ahash_request *ahash_dequeue_request(
81         struct crypto_queue *queue)
82 {
83         return ahash_request_cast(crypto_dequeue_request(queue));
84 }
85
86 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
87                                           struct crypto_ahash *tfm)
88 {
89         return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
90 }
91
92 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
93 {
94         return crypto_tfm_ctx(&tfm->base);
95 }
96
97 static inline struct crypto_instance *shash_crypto_instance(
98         struct shash_instance *inst)
99 {
100         return container_of(&inst->alg.base, struct crypto_instance, alg);
101 }
102
103 static inline struct shash_instance *shash_instance(
104         struct crypto_instance *inst)
105 {
106         return container_of(__crypto_shash_alg(&inst->alg),
107                             struct shash_instance, alg);
108 }
109
110 static inline struct shash_instance *shash_alloc_instance(
111         const char *name, struct crypto_alg *alg)
112 {
113         return crypto_alloc_instance2(name, alg,
114                                       sizeof(struct shash_alg) - sizeof(*alg));
115 }
116
117 static inline struct crypto_shash *crypto_spawn_shash(
118         struct crypto_shash_spawn *spawn)
119 {
120         return crypto_spawn_tfm2(&spawn->base);
121 }
122
123 #endif  /* _CRYPTO_INTERNAL_HASH_H */
124