Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux
[~shefty/rdma-dev.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 ahash_instance {
38         struct ahash_alg alg;
39 };
40
41 struct shash_instance {
42         struct shash_alg alg;
43 };
44
45 struct crypto_ahash_spawn {
46         struct crypto_spawn base;
47 };
48
49 struct crypto_shash_spawn {
50         struct crypto_spawn base;
51 };
52
53 extern const struct crypto_type crypto_ahash_type;
54
55 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
56 int crypto_hash_walk_first(struct ahash_request *req,
57                            struct crypto_hash_walk *walk);
58 int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
59                                   struct crypto_hash_walk *walk,
60                                   struct scatterlist *sg, unsigned int len);
61
62 static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
63 {
64         return !(walk->entrylen | walk->total);
65 }
66
67 int crypto_register_ahash(struct ahash_alg *alg);
68 int crypto_unregister_ahash(struct ahash_alg *alg);
69 int ahash_register_instance(struct crypto_template *tmpl,
70                             struct ahash_instance *inst);
71 void ahash_free_instance(struct crypto_instance *inst);
72
73 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
74                             struct hash_alg_common *alg,
75                             struct crypto_instance *inst);
76
77 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
78 {
79         crypto_drop_spawn(&spawn->base);
80 }
81
82 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
83
84 int crypto_register_shash(struct shash_alg *alg);
85 int crypto_unregister_shash(struct shash_alg *alg);
86 int crypto_register_shashes(struct shash_alg *algs, int count);
87 int crypto_unregister_shashes(struct shash_alg *algs, int count);
88 int shash_register_instance(struct crypto_template *tmpl,
89                             struct shash_instance *inst);
90 void shash_free_instance(struct crypto_instance *inst);
91
92 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
93                             struct shash_alg *alg,
94                             struct crypto_instance *inst);
95
96 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
97 {
98         crypto_drop_spawn(&spawn->base);
99 }
100
101 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
102
103 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
104 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
105 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
106
107 int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
108
109 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
110 {
111         return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
112 }
113
114 static 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
120 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
121                                             unsigned int reqsize)
122 {
123         tfm->reqsize = reqsize;
124 }
125
126 static 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
132 static 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
138 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
139 {
140         return crypto_instance_ctx(ahash_crypto_instance(inst));
141 }
142
143 static inline unsigned int ahash_instance_headroom(void)
144 {
145         return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);
146 }
147
148 static 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
154 static inline struct crypto_ahash *crypto_spawn_ahash(
155         struct crypto_ahash_spawn *spawn)
156 {
157         return crypto_spawn_tfm2(&spawn->base);
158 }
159
160 static 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
166 static inline struct ahash_request *ahash_dequeue_request(
167         struct crypto_queue *queue)
168 {
169         return ahash_request_cast(crypto_dequeue_request(queue));
170 }
171
172 static 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
178 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
179 {
180         return crypto_tfm_ctx(&tfm->base);
181 }
182
183 static 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
189 static 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
196 static inline void *shash_instance_ctx(struct shash_instance *inst)
197 {
198         return crypto_instance_ctx(shash_crypto_instance(inst));
199 }
200
201 static 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
208 static inline struct crypto_shash *crypto_spawn_shash(
209         struct crypto_shash_spawn *spawn)
210 {
211         return crypto_spawn_tfm2(&spawn->base);
212 }
213
214 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
215 {
216         return crypto_tfm_ctx_aligned(&tfm->base);
217 }
218
219 static 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