[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>
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 67830e7..0ec2467 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -93,6 +93,7 @@
struct crypto_async_request;
struct crypto_blkcipher;
struct crypto_hash;
+struct crypto_queue;
struct crypto_tfm;
struct crypto_type;
@@ -143,6 +144,19 @@
* 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 @@
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 @@
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 @@
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)
{