2 * Cryptographic API for algorithms (i.e., low-level API).
4 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
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)
12 #ifndef _CRYPTO_ALGAPI_H
13 #define _CRYPTO_ALGAPI_H
15 #include <linux/crypto.h>
16 #include <linux/list.h>
17 #include <linux/kernel.h>
24 unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask);
25 int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask);
26 void (*exit)(struct crypto_tfm *tfm);
27 void (*show)(struct seq_file *m, struct crypto_alg *alg);
30 struct crypto_instance {
31 struct crypto_alg alg;
33 struct crypto_template *tmpl;
34 struct hlist_node list;
36 void *__ctx[] CRYPTO_MINALIGN_ATTR;
39 struct crypto_template {
40 struct list_head list;
41 struct hlist_head instances;
42 struct module *module;
44 struct crypto_instance *(*alloc)(struct rtattr **tb);
45 void (*free)(struct crypto_instance *inst);
47 char name[CRYPTO_MAX_ALG_NAME];
51 struct list_head list;
52 struct crypto_alg *alg;
53 struct crypto_instance *inst;
58 struct list_head list;
59 struct list_head *backlog;
62 unsigned int max_qlen;
66 struct scatterlist *sg;
70 struct blkcipher_walk {
83 struct scatter_walk in;
86 struct scatter_walk out;
96 extern const struct crypto_type crypto_ablkcipher_type;
97 extern const struct crypto_type crypto_aead_type;
98 extern const struct crypto_type crypto_blkcipher_type;
99 extern const struct crypto_type crypto_hash_type;
101 void crypto_mod_put(struct crypto_alg *alg);
103 int crypto_register_template(struct crypto_template *tmpl);
104 void crypto_unregister_template(struct crypto_template *tmpl);
105 struct crypto_template *crypto_lookup_template(const char *name);
107 int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
108 struct crypto_instance *inst, u32 mask);
109 void crypto_drop_spawn(struct crypto_spawn *spawn);
110 struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
113 struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
114 int crypto_check_attr_type(struct rtattr **tb, u32 type);
115 struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb, u32 type, u32 mask);
116 struct crypto_instance *crypto_alloc_instance(const char *name,
117 struct crypto_alg *alg);
119 void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
120 int crypto_enqueue_request(struct crypto_queue *queue,
121 struct crypto_async_request *request);
122 struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
123 int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm);
125 int blkcipher_walk_done(struct blkcipher_desc *desc,
126 struct blkcipher_walk *walk, int err);
127 int blkcipher_walk_virt(struct blkcipher_desc *desc,
128 struct blkcipher_walk *walk);
129 int blkcipher_walk_phys(struct blkcipher_desc *desc,
130 struct blkcipher_walk *walk);
132 static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
134 unsigned long addr = (unsigned long)crypto_tfm_ctx(tfm);
135 unsigned long align = crypto_tfm_alg_alignmask(tfm);
137 if (align <= crypto_tfm_ctx_alignment())
139 return (void *)ALIGN(addr, align);
142 static inline struct crypto_instance *crypto_tfm_alg_instance(
143 struct crypto_tfm *tfm)
145 return container_of(tfm->__crt_alg, struct crypto_instance, alg);
148 static inline void *crypto_instance_ctx(struct crypto_instance *inst)
153 static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
154 struct crypto_ablkcipher *tfm)
156 return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
159 static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
161 return crypto_tfm_ctx(&tfm->base);
164 static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm)
166 return crypto_tfm_ctx_aligned(&tfm->base);
169 static inline struct aead_alg *crypto_aead_alg(struct crypto_aead *tfm)
171 return &crypto_aead_tfm(tfm)->__crt_alg->cra_aead;
174 static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
175 struct crypto_spawn *spawn)
177 u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
178 u32 mask = CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC;
180 return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
183 static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm)
185 return crypto_tfm_ctx(&tfm->base);
188 static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm)
190 return crypto_tfm_ctx_aligned(&tfm->base);
193 static inline struct crypto_cipher *crypto_spawn_cipher(
194 struct crypto_spawn *spawn)
196 u32 type = CRYPTO_ALG_TYPE_CIPHER;
197 u32 mask = CRYPTO_ALG_TYPE_MASK;
199 return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
202 static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
204 return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
207 static inline struct crypto_hash *crypto_spawn_hash(struct crypto_spawn *spawn)
209 u32 type = CRYPTO_ALG_TYPE_HASH;
210 u32 mask = CRYPTO_ALG_TYPE_HASH_MASK;
212 return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask));
215 static inline void *crypto_hash_ctx_aligned(struct crypto_hash *tfm)
217 return crypto_tfm_ctx_aligned(&tfm->base);
220 static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
221 struct scatterlist *dst,
222 struct scatterlist *src,
227 walk->total = nbytes;
230 static inline struct crypto_async_request *crypto_get_backlog(
231 struct crypto_queue *queue)
233 return queue->backlog == &queue->list ? NULL :
234 container_of(queue->backlog, struct crypto_async_request, list);
237 static inline int ablkcipher_enqueue_request(struct ablkcipher_alg *alg,
238 struct ablkcipher_request *request)
240 return crypto_enqueue_request(alg->queue, &request->base);
243 static inline struct ablkcipher_request *ablkcipher_dequeue_request(
244 struct ablkcipher_alg *alg)
246 return ablkcipher_request_cast(crypto_dequeue_request(alg->queue));
249 static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
254 static inline int ablkcipher_tfm_in_queue(struct crypto_ablkcipher *tfm)
256 return crypto_tfm_in_queue(crypto_ablkcipher_alg(tfm)->queue,
257 crypto_ablkcipher_tfm(tfm));
260 #endif /* _CRYPTO_ALGAPI_H */