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Commit 03bf712f authored by Herbert Xu's avatar Herbert Xu
Browse files

[CRYPTO] skcipher: Add top-level givencrypt/givdecrypt calls 



This patch finally makes the givencrypt/givdecrypt operations available
to users by adding crypto_skcipher_givencrypt and crypto_skcipher_givdecrypt.
A suite of helpers to allocate and fill in the request is also available.

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 0a270321

include/crypto/skcipher.h

+72 −0
Original line number Diff line number Diff line
@@ -14,6 +14,8 @@ 
#define _CRYPTO_SKCIPHER_H



#include <linux/crypto.h>

#include <linux/kernel.h>

#include <linux/slab.h>



/**

 *	struct skcipher_givcrypt_request - Crypto request with IV generation
@@ -34,5 +36,75 @@ static inline struct crypto_ablkcipher *skcipher_givcrypt_reqtfm( 
	return crypto_ablkcipher_reqtfm(&req->creq);

}



static inline int crypto_skcipher_givencrypt(

	struct skcipher_givcrypt_request *req)

{

	struct ablkcipher_tfm *crt =

		crypto_ablkcipher_crt(skcipher_givcrypt_reqtfm(req));

	return crt->givencrypt(req);

};



static inline int crypto_skcipher_givdecrypt(

	struct skcipher_givcrypt_request *req)

{

	struct ablkcipher_tfm *crt =

		crypto_ablkcipher_crt(skcipher_givcrypt_reqtfm(req));

	return crt->givdecrypt(req);

};



static inline void skcipher_givcrypt_set_tfm(

	struct skcipher_givcrypt_request *req, struct crypto_ablkcipher *tfm)

{

	req->creq.base.tfm = crypto_ablkcipher_tfm(tfm);

}



static inline struct skcipher_givcrypt_request *skcipher_givcrypt_cast(

	struct crypto_async_request *req)

{

	return container_of(ablkcipher_request_cast(req),

			    struct skcipher_givcrypt_request, creq);

}



static inline struct skcipher_givcrypt_request *skcipher_givcrypt_alloc(

	struct crypto_ablkcipher *tfm, gfp_t gfp)

{

	struct skcipher_givcrypt_request *req;



	req = kmalloc(sizeof(struct skcipher_givcrypt_request) +

		      crypto_ablkcipher_reqsize(tfm), gfp);



	if (likely(req))

		skcipher_givcrypt_set_tfm(req, tfm);



	return req;

}



static inline void skcipher_givcrypt_free(struct skcipher_givcrypt_request *req)

{

	kfree(req);

}



static inline void skcipher_givcrypt_set_callback(

	struct skcipher_givcrypt_request *req, u32 flags,

	crypto_completion_t complete, void *data)

{

	ablkcipher_request_set_callback(&req->creq, flags, complete, data);

}



static inline void skcipher_givcrypt_set_crypt(

	struct skcipher_givcrypt_request *req,

	struct scatterlist *src, struct scatterlist *dst,

	unsigned int nbytes, void *iv)

{

	ablkcipher_request_set_crypt(&req->creq, src, dst, nbytes, iv);

}



static inline void skcipher_givcrypt_set_giv(

	struct skcipher_givcrypt_request *req, u8 *giv, u64 seq)

{

	req->giv = giv;

	req->seq = seq;

}



#endif	/* _CRYPTO_SKCIPHER_H */