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authorHerbert Xu <herbert@gondor.apana.org.au>2007-04-16 14:48:54 +0400
committerHerbert Xu <herbert@gondor.apana.org.au>2007-05-02 08:38:31 +0400
commitb5b7f08869340aa8cfa23303f7d195f161479592 (patch)
treedd1f3f00165e7ca31e29a52d64909439cdfab8fd /include
parentebc610e5bc76df073221e64e86c3f7533a09ea40 (diff)
downloadlinux-b5b7f08869340aa8cfa23303f7d195f161479592.tar.xz
[CRYPTO] api: Add async blkcipher type
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>
Diffstat (limited to 'include')
-rw-r--r--include/crypto/algapi.h58
-rw-r--r--include/linux/crypto.h22
2 files changed, 80 insertions, 0 deletions
diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index d0c190b4d02f..469f511315c5 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -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 */
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 67830e7c2c31..0ec2467891db 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -93,6 +93,7 @@ struct crypto_ablkcipher;
struct crypto_async_request;
struct crypto_blkcipher;
struct crypto_hash;
+struct crypto_queue;
struct crypto_tfm;
struct crypto_type;
@@ -143,6 +144,19 @@ struct hash_desc {
* Algorithms: modular crypto algorithm implementations, managed
* via crypto_register_alg() and crypto_unregister_alg().
*/
+struct ablkcipher_alg {
+ int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key,
+ unsigned int keylen);
+ int (*encrypt)(struct ablkcipher_request *req);
+ int (*decrypt)(struct ablkcipher_request *req);
+
+ struct crypto_queue *queue;
+
+ unsigned int min_keysize;
+ unsigned int max_keysize;
+ unsigned int ivsize;
+};
+
struct blkcipher_alg {
int (*setkey)(struct crypto_tfm *tfm, const u8 *key,
unsigned int keylen);
@@ -197,6 +211,7 @@ struct compress_alg {
unsigned int slen, u8 *dst, unsigned int *dlen);
};
+#define cra_ablkcipher cra_u.ablkcipher
#define cra_blkcipher cra_u.blkcipher
#define cra_cipher cra_u.cipher
#define cra_digest cra_u.digest
@@ -221,6 +236,7 @@ struct crypto_alg {
const struct crypto_type *cra_type;
union {
+ struct ablkcipher_alg ablkcipher;
struct blkcipher_alg blkcipher;
struct cipher_alg cipher;
struct digest_alg digest;
@@ -572,6 +588,12 @@ static inline int crypto_ablkcipher_reqsize(struct crypto_ablkcipher *tfm)
return crypto_ablkcipher_crt(tfm)->reqsize;
}
+static inline struct ablkcipher_request *ablkcipher_request_cast(
+ struct crypto_async_request *req)
+{
+ return container_of(req, struct ablkcipher_request, base);
+}
+
static inline struct ablkcipher_request *ablkcipher_request_alloc(
struct crypto_ablkcipher *tfm, gfp_t gfp)
{