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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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22
include/linux/crypto.h
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@ -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)
{