crypto: hash - Add shash interface
[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
43 int crypto_register_shash(struct shash_alg *alg);
44 int crypto_unregister_shash(struct shash_alg *alg);
45
46 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
47 {
48         return crypto_tfm_ctx(&tfm->base);
49 }
50
51 static inline struct ahash_alg *crypto_ahash_alg(
52         struct crypto_ahash *tfm)
53 {
54         return &crypto_ahash_tfm(tfm)->__crt_alg->cra_ahash;
55 }
56
57 static inline int ahash_enqueue_request(struct crypto_queue *queue,
58                                              struct ahash_request *request)
59 {
60         return crypto_enqueue_request(queue, &request->base);
61 }
62
63 static inline struct ahash_request *ahash_dequeue_request(
64         struct crypto_queue *queue)
65 {
66         return ahash_request_cast(crypto_dequeue_request(queue));
67 }
68
69 static inline void *ahash_request_ctx(struct ahash_request *req)
70 {
71         return req->__ctx;
72 }
73
74 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
75                                           struct crypto_ahash *tfm)
76 {
77         return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
78 }
79
80 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
81 {
82         return crypto_tfm_ctx(&tfm->base);
83 }
84
85 #endif  /* _CRYPTO_INTERNAL_HASH_H */
86