crypto: ahash - Add instance/spawn support
[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 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 int crypto_register_ahash(struct ahash_alg *alg);
63 int crypto_unregister_ahash(struct ahash_alg *alg);
64 int ahash_register_instance(struct crypto_template *tmpl,
65                             struct ahash_instance *inst);
66 void ahash_free_instance(struct crypto_instance *inst);
67
68 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
69                             struct hash_alg_common *alg,
70                             struct crypto_instance *inst);
71
72 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
73
74 int crypto_register_shash(struct shash_alg *alg);
75 int crypto_unregister_shash(struct shash_alg *alg);
76 int shash_register_instance(struct crypto_template *tmpl,
77                             struct shash_instance *inst);
78 void shash_free_instance(struct crypto_instance *inst);
79
80 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
81                             struct shash_alg *alg,
82                             struct crypto_instance *inst);
83
84 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
85
86 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
87 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
88
89 int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
90
91 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
92 {
93         return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
94 }
95
96 static inline struct old_ahash_alg *crypto_old_ahash_alg(
97         struct crypto_ahash *tfm)
98 {
99         return &crypto_ahash_tfm(tfm)->__crt_alg->cra_ahash;
100 }
101
102 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
103                                             unsigned int reqsize)
104 {
105         tfm->reqsize = reqsize;
106 }
107
108 static inline struct crypto_instance *ahash_crypto_instance(
109         struct ahash_instance *inst)
110 {
111         return container_of(&inst->alg.halg.base, struct crypto_instance, alg);
112 }
113
114 static inline struct ahash_instance *ahash_instance(
115         struct crypto_instance *inst)
116 {
117         return container_of(&inst->alg, struct ahash_instance, alg.halg.base);
118 }
119
120 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
121 {
122         return crypto_instance_ctx(ahash_crypto_instance(inst));
123 }
124
125 static inline unsigned int ahash_instance_headroom(void)
126 {
127         return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);
128 }
129
130 static inline struct ahash_instance *ahash_alloc_instance(
131         const char *name, struct crypto_alg *alg)
132 {
133         return crypto_alloc_instance2(name, alg, ahash_instance_headroom());
134 }
135
136 static inline struct crypto_ahash *crypto_spawn_ahash(
137         struct crypto_ahash_spawn *spawn)
138 {
139         return crypto_spawn_tfm2(&spawn->base);
140 }
141
142 static inline int ahash_enqueue_request(struct crypto_queue *queue,
143                                              struct ahash_request *request)
144 {
145         return crypto_enqueue_request(queue, &request->base);
146 }
147
148 static inline struct ahash_request *ahash_dequeue_request(
149         struct crypto_queue *queue)
150 {
151         return ahash_request_cast(crypto_dequeue_request(queue));
152 }
153
154 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
155                                           struct crypto_ahash *tfm)
156 {
157         return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
158 }
159
160 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
161 {
162         return crypto_tfm_ctx(&tfm->base);
163 }
164
165 static inline struct crypto_instance *shash_crypto_instance(
166         struct shash_instance *inst)
167 {
168         return container_of(&inst->alg.base, struct crypto_instance, alg);
169 }
170
171 static inline struct shash_instance *shash_instance(
172         struct crypto_instance *inst)
173 {
174         return container_of(__crypto_shash_alg(&inst->alg),
175                             struct shash_instance, alg);
176 }
177
178 static inline void *shash_instance_ctx(struct shash_instance *inst)
179 {
180         return crypto_instance_ctx(shash_crypto_instance(inst));
181 }
182
183 static inline struct shash_instance *shash_alloc_instance(
184         const char *name, struct crypto_alg *alg)
185 {
186         return crypto_alloc_instance2(name, alg,
187                                       sizeof(struct shash_alg) - sizeof(*alg));
188 }
189
190 static inline struct crypto_shash *crypto_spawn_shash(
191         struct crypto_shash_spawn *spawn)
192 {
193         return crypto_spawn_tfm2(&spawn->base);
194 }
195
196 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
197 {
198         return crypto_tfm_ctx_aligned(&tfm->base);
199 }
200
201 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
202 {
203         return container_of(tfm, struct crypto_shash, base);
204 }
205
206 #endif  /* _CRYPTO_INTERNAL_HASH_H */
207