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[CRYPTO] api: Add async blkcipher type

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This patch adds the mid-level interface for asynchronous block ciphers.
It also includes a generic queueing mechanism that can be used by other
asynchronous crypto operations in future.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2007-04-16 20:48:54 +10:00
parent ebc610e5bc
commit b5b7f08869
6 changed files with 230 additions and 0 deletions
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58
include/crypto/algapi.h
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@@ -13,6 +13,8 @@
#define _CRYPTO_ALGAPI_H
#include <linux/crypto.h>
#include <linux/list.h>
#include <linux/kernel.h>
struct module;
struct rtattr;
@@ -51,6 +53,14 @@ struct crypto_spawn {
struct crypto_instance *inst;
};
struct crypto_queue {
struct list_head list;
struct list_head *backlog;
unsigned int qlen;
unsigned int max_qlen;
};
struct scatter_walk {
struct scatterlist *sg;
unsigned int offset;
@@ -82,6 +92,7 @@ struct blkcipher_walk {
int flags;
};
extern const struct crypto_type crypto_ablkcipher_type;
extern const struct crypto_type crypto_blkcipher_type;
extern const struct crypto_type crypto_hash_type;
@@ -103,6 +114,12 @@ struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb, u32 type, u32 mask);
struct crypto_instance *crypto_alloc_instance(const char *name,
struct crypto_alg *alg);
void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
int crypto_enqueue_request(struct crypto_queue *queue,
struct crypto_async_request *request);
struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm);
int blkcipher_walk_done(struct blkcipher_desc *desc,
struct blkcipher_walk *walk, int err);
int blkcipher_walk_virt(struct blkcipher_desc *desc,
@@ -125,6 +142,17 @@ static inline void *crypto_instance_ctx(struct crypto_instance *inst)
return inst->__ctx;
}
static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
struct crypto_ablkcipher *tfm)
{
return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
}
static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
{
return crypto_tfm_ctx(&tfm->base);
}
static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm)
{
return crypto_tfm_ctx(&tfm->base);
@@ -172,5 +200,35 @@ static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
walk->total = nbytes;
}
static inline struct crypto_async_request *crypto_get_backlog(
struct crypto_queue *queue)
{
return queue->backlog == &queue->list ? NULL :
container_of(queue->backlog, struct crypto_async_request, list);
}
static inline int ablkcipher_enqueue_request(struct ablkcipher_alg *alg,
struct ablkcipher_request *request)
{
return crypto_enqueue_request(alg->queue, &request->base);
}
static inline struct ablkcipher_request *ablkcipher_dequeue_request(
struct ablkcipher_alg *alg)
{
return ablkcipher_request_cast(crypto_dequeue_request(alg->queue));
}
static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
{
return req->__ctx;
}
static inline int ablkcipher_tfm_in_queue(struct crypto_ablkcipher *tfm)
{
return crypto_tfm_in_queue(crypto_ablkcipher_alg(tfm)->queue,
crypto_ablkcipher_tfm(tfm));
}
#endif /* _CRYPTO_ALGAPI_H */