crypto: hash - Export shash through hash
[linux-3.10.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 extern const struct crypto_type crypto_ahash_type;
38
39 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
40 int crypto_hash_walk_first(struct ahash_request *req,
41                            struct crypto_hash_walk *walk);
42 int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
43                                   struct crypto_hash_walk *walk,
44                                   struct scatterlist *sg, unsigned int len);
45
46 int crypto_register_shash(struct shash_alg *alg);
47 int crypto_unregister_shash(struct shash_alg *alg);
48
49 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
50 {
51         return crypto_tfm_ctx(&tfm->base);
52 }
53
54 static inline struct ahash_alg *crypto_ahash_alg(
55         struct crypto_ahash *tfm)
56 {
57         return &crypto_ahash_tfm(tfm)->__crt_alg->cra_ahash;
58 }
59
60 static inline int ahash_enqueue_request(struct crypto_queue *queue,
61                                              struct ahash_request *request)
62 {
63         return crypto_enqueue_request(queue, &request->base);
64 }
65
66 static inline struct ahash_request *ahash_dequeue_request(
67         struct crypto_queue *queue)
68 {
69         return ahash_request_cast(crypto_dequeue_request(queue));
70 }
71
72 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
73                                           struct crypto_ahash *tfm)
74 {
75         return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
76 }
77
78 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
79 {
80         return crypto_tfm_ctx(&tfm->base);
81 }
82
83 #endif  /* _CRYPTO_INTERNAL_HASH_H */
84