Commit | Line | Data |
---|---|---|
cce9e06d HX |
1 | /* |
2 | * Cryptographic API for algorithms (i.e., low-level API). | |
3 | * | |
4 | * Copyright (c) 2006 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 | #ifndef _CRYPTO_ALGAPI_H | |
13 | #define _CRYPTO_ALGAPI_H | |
14 | ||
15 | #include <linux/crypto.h> | |
b5b7f088 HX |
16 | #include <linux/list.h> |
17 | #include <linux/kernel.h> | |
cce9e06d | 18 | |
4cc7720c | 19 | struct module; |
ebc610e5 | 20 | struct rtattr; |
e853c3cf HX |
21 | struct seq_file; |
22 | ||
23 | struct crypto_type { | |
27d2a330 HX |
24 | unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask); |
25 | int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask); | |
e853c3cf HX |
26 | void (*exit)(struct crypto_tfm *tfm); |
27 | void (*show)(struct seq_file *m, struct crypto_alg *alg); | |
28 | }; | |
4cc7720c HX |
29 | |
30 | struct crypto_instance { | |
31 | struct crypto_alg alg; | |
32 | ||
33 | struct crypto_template *tmpl; | |
34 | struct hlist_node list; | |
35 | ||
36 | void *__ctx[] CRYPTO_MINALIGN_ATTR; | |
37 | }; | |
38 | ||
39 | struct crypto_template { | |
40 | struct list_head list; | |
41 | struct hlist_head instances; | |
42 | struct module *module; | |
43 | ||
ebc610e5 | 44 | struct crypto_instance *(*alloc)(struct rtattr **tb); |
4cc7720c HX |
45 | void (*free)(struct crypto_instance *inst); |
46 | ||
47 | char name[CRYPTO_MAX_ALG_NAME]; | |
48 | }; | |
49 | ||
6bfd4809 HX |
50 | struct crypto_spawn { |
51 | struct list_head list; | |
52 | struct crypto_alg *alg; | |
53 | struct crypto_instance *inst; | |
a73e6996 | 54 | u32 mask; |
6bfd4809 HX |
55 | }; |
56 | ||
b5b7f088 HX |
57 | struct crypto_queue { |
58 | struct list_head list; | |
59 | struct list_head *backlog; | |
60 | ||
61 | unsigned int qlen; | |
62 | unsigned int max_qlen; | |
63 | }; | |
64 | ||
5c64097a HX |
65 | struct scatter_walk { |
66 | struct scatterlist *sg; | |
67 | unsigned int offset; | |
68 | }; | |
69 | ||
5cde0af2 HX |
70 | struct blkcipher_walk { |
71 | union { | |
72 | struct { | |
73 | struct page *page; | |
74 | unsigned long offset; | |
75 | } phys; | |
76 | ||
77 | struct { | |
78 | u8 *page; | |
79 | u8 *addr; | |
80 | } virt; | |
81 | } src, dst; | |
82 | ||
83 | struct scatter_walk in; | |
84 | unsigned int nbytes; | |
85 | ||
86 | struct scatter_walk out; | |
87 | unsigned int total; | |
88 | ||
89 | void *page; | |
90 | u8 *buffer; | |
91 | u8 *iv; | |
92 | ||
93 | int flags; | |
94 | }; | |
95 | ||
b5b7f088 | 96 | extern const struct crypto_type crypto_ablkcipher_type; |
5cde0af2 | 97 | extern const struct crypto_type crypto_blkcipher_type; |
055bcee3 | 98 | extern const struct crypto_type crypto_hash_type; |
5cde0af2 | 99 | |
db131ef9 HX |
100 | void crypto_mod_put(struct crypto_alg *alg); |
101 | ||
4cc7720c HX |
102 | int crypto_register_template(struct crypto_template *tmpl); |
103 | void crypto_unregister_template(struct crypto_template *tmpl); | |
104 | struct crypto_template *crypto_lookup_template(const char *name); | |
105 | ||
6bfd4809 | 106 | int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, |
a73e6996 | 107 | struct crypto_instance *inst, u32 mask); |
6bfd4809 | 108 | void crypto_drop_spawn(struct crypto_spawn *spawn); |
2e306ee0 HX |
109 | struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type, |
110 | u32 mask); | |
6bfd4809 | 111 | |
ebc610e5 HX |
112 | struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb); |
113 | int crypto_check_attr_type(struct rtattr **tb, u32 type); | |
114 | struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb, u32 type, u32 mask); | |
7fed0bf2 HX |
115 | struct crypto_instance *crypto_alloc_instance(const char *name, |
116 | struct crypto_alg *alg); | |
117 | ||
b5b7f088 HX |
118 | void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen); |
119 | int crypto_enqueue_request(struct crypto_queue *queue, | |
120 | struct crypto_async_request *request); | |
121 | struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue); | |
122 | int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm); | |
123 | ||
5cde0af2 HX |
124 | int blkcipher_walk_done(struct blkcipher_desc *desc, |
125 | struct blkcipher_walk *walk, int err); | |
126 | int blkcipher_walk_virt(struct blkcipher_desc *desc, | |
127 | struct blkcipher_walk *walk); | |
128 | int blkcipher_walk_phys(struct blkcipher_desc *desc, | |
129 | struct blkcipher_walk *walk); | |
130 | ||
131 | static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm) | |
132 | { | |
133 | unsigned long addr = (unsigned long)crypto_tfm_ctx(tfm); | |
134 | unsigned long align = crypto_tfm_alg_alignmask(tfm); | |
135 | ||
136 | if (align <= crypto_tfm_ctx_alignment()) | |
137 | align = 1; | |
138 | return (void *)ALIGN(addr, align); | |
139 | } | |
140 | ||
124b53d0 HX |
141 | static inline struct crypto_instance *crypto_tfm_alg_instance( |
142 | struct crypto_tfm *tfm) | |
143 | { | |
144 | return container_of(tfm->__crt_alg, struct crypto_instance, alg); | |
145 | } | |
146 | ||
4cc7720c HX |
147 | static inline void *crypto_instance_ctx(struct crypto_instance *inst) |
148 | { | |
149 | return inst->__ctx; | |
150 | } | |
151 | ||
b5b7f088 HX |
152 | static inline struct ablkcipher_alg *crypto_ablkcipher_alg( |
153 | struct crypto_ablkcipher *tfm) | |
154 | { | |
155 | return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher; | |
156 | } | |
157 | ||
158 | static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm) | |
159 | { | |
160 | return crypto_tfm_ctx(&tfm->base); | |
161 | } | |
162 | ||
aa379a6a SS |
163 | static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm) |
164 | { | |
165 | return crypto_tfm_ctx_aligned(&tfm->base); | |
166 | } | |
167 | ||
124b53d0 HX |
168 | static inline struct crypto_blkcipher *crypto_spawn_blkcipher( |
169 | struct crypto_spawn *spawn) | |
170 | { | |
171 | u32 type = CRYPTO_ALG_TYPE_BLKCIPHER; | |
172 | u32 mask = CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC; | |
173 | ||
174 | return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask)); | |
175 | } | |
176 | ||
5cde0af2 HX |
177 | static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm) |
178 | { | |
179 | return crypto_tfm_ctx(&tfm->base); | |
180 | } | |
181 | ||
182 | static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm) | |
183 | { | |
184 | return crypto_tfm_ctx_aligned(&tfm->base); | |
185 | } | |
186 | ||
2e306ee0 HX |
187 | static inline struct crypto_cipher *crypto_spawn_cipher( |
188 | struct crypto_spawn *spawn) | |
189 | { | |
190 | u32 type = CRYPTO_ALG_TYPE_CIPHER; | |
191 | u32 mask = CRYPTO_ALG_TYPE_MASK; | |
192 | ||
193 | return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask)); | |
194 | } | |
195 | ||
f28776a3 HX |
196 | static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm) |
197 | { | |
198 | return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher; | |
199 | } | |
200 | ||
2e306ee0 HX |
201 | static inline struct crypto_hash *crypto_spawn_hash(struct crypto_spawn *spawn) |
202 | { | |
203 | u32 type = CRYPTO_ALG_TYPE_HASH; | |
204 | u32 mask = CRYPTO_ALG_TYPE_HASH_MASK; | |
205 | ||
206 | return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask)); | |
207 | } | |
208 | ||
055bcee3 HX |
209 | static inline void *crypto_hash_ctx_aligned(struct crypto_hash *tfm) |
210 | { | |
211 | return crypto_tfm_ctx_aligned(&tfm->base); | |
212 | } | |
213 | ||
5cde0af2 HX |
214 | static inline void blkcipher_walk_init(struct blkcipher_walk *walk, |
215 | struct scatterlist *dst, | |
216 | struct scatterlist *src, | |
217 | unsigned int nbytes) | |
218 | { | |
219 | walk->in.sg = src; | |
220 | walk->out.sg = dst; | |
221 | walk->total = nbytes; | |
222 | } | |
223 | ||
b5b7f088 HX |
224 | static inline struct crypto_async_request *crypto_get_backlog( |
225 | struct crypto_queue *queue) | |
226 | { | |
227 | return queue->backlog == &queue->list ? NULL : | |
228 | container_of(queue->backlog, struct crypto_async_request, list); | |
229 | } | |
230 | ||
231 | static inline int ablkcipher_enqueue_request(struct ablkcipher_alg *alg, | |
232 | struct ablkcipher_request *request) | |
233 | { | |
234 | return crypto_enqueue_request(alg->queue, &request->base); | |
235 | } | |
236 | ||
237 | static inline struct ablkcipher_request *ablkcipher_dequeue_request( | |
238 | struct ablkcipher_alg *alg) | |
239 | { | |
240 | return ablkcipher_request_cast(crypto_dequeue_request(alg->queue)); | |
241 | } | |
242 | ||
243 | static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req) | |
244 | { | |
245 | return req->__ctx; | |
246 | } | |
247 | ||
248 | static inline int ablkcipher_tfm_in_queue(struct crypto_ablkcipher *tfm) | |
249 | { | |
250 | return crypto_tfm_in_queue(crypto_ablkcipher_alg(tfm)->queue, | |
251 | crypto_ablkcipher_tfm(tfm)); | |
252 | } | |
253 | ||
cce9e06d HX |
254 | #endif /* _CRYPTO_ALGAPI_H */ |
255 |