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Commit 376e0d69 authored by Herbert Xu's avatar Herbert Xu
Browse files

crypto: echainiv - Use generic geniv init/exit helpers 



This patch replaces the echainiv init/exit handlers with the generic
geniv helpers.

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 659e7f52

crypto/echainiv.c

+7 −63
Original line number Diff line number Diff line
@@ -19,8 +19,6 @@ 
 */



#include <crypto/internal/geniv.h>

#include <crypto/null.h>

#include <crypto/rng.h>

#include <crypto/scatterwalk.h>

#include <linux/err.h>

#include <linux/init.h>
@@ -33,13 +31,6 @@ 


#define MAX_IV_SIZE 16



struct echainiv_ctx {

	/* aead_geniv_ctx must be first the element */

	struct aead_geniv_ctx geniv;

	struct crypto_blkcipher *null;

	u8 salt[] __attribute__ ((aligned(__alignof__(u32))));

};



static DEFINE_PER_CPU(u32 [MAX_IV_SIZE / sizeof(u32)], echainiv_iv);



/* We don't care if we get preempted and read/write IVs from the next CPU. */
@@ -103,7 +94,7 @@ static void echainiv_encrypt_complete(struct crypto_async_request *base, 
static int echainiv_encrypt(struct aead_request *req)

{

	struct crypto_aead *geniv = crypto_aead_reqtfm(req);

	struct echainiv_ctx *ctx = crypto_aead_ctx(geniv);

	struct aead_geniv_ctx *ctx = crypto_aead_ctx(geniv);

	struct aead_request *subreq = aead_request_ctx(req);

	crypto_completion_t compl;

	void *data;
@@ -114,7 +105,7 @@ static int echainiv_encrypt(struct aead_request *req) 
	if (req->cryptlen < ivsize)

		return -EINVAL;



	aead_request_set_tfm(subreq, ctx->geniv.child);

	aead_request_set_tfm(subreq, ctx->child);



	compl = echainiv_encrypt_complete;

	data = req;
@@ -160,7 +151,7 @@ static int echainiv_encrypt(struct aead_request *req) 
static int echainiv_decrypt(struct aead_request *req)

{

	struct crypto_aead *geniv = crypto_aead_reqtfm(req);

	struct echainiv_ctx *ctx = crypto_aead_ctx(geniv);

	struct aead_geniv_ctx *ctx = crypto_aead_ctx(geniv);

	struct aead_request *subreq = aead_request_ctx(req);

	crypto_completion_t compl;

	void *data;
@@ -169,7 +160,7 @@ static int echainiv_decrypt(struct aead_request *req) 
	if (req->cryptlen < ivsize)

		return -EINVAL;



	aead_request_set_tfm(subreq, ctx->geniv.child);

	aead_request_set_tfm(subreq, ctx->child);



	compl = req->base.complete;

	data = req->base.data;
@@ -184,53 +175,6 @@ static int echainiv_decrypt(struct aead_request *req) 
	return crypto_aead_decrypt(subreq);

}



static int echainiv_init(struct crypto_aead *geniv)

{

	struct echainiv_ctx *ctx = crypto_aead_ctx(geniv);

	int err;



	spin_lock_init(&ctx->geniv.lock);



	crypto_aead_set_reqsize(geniv, sizeof(struct aead_request));



	err = crypto_get_default_rng();

	if (err)

		goto out;



	err = crypto_rng_get_bytes(crypto_default_rng, ctx->salt,

				   crypto_aead_ivsize(geniv));

	crypto_put_default_rng();

	if (err)

		goto out;



	ctx->null = crypto_get_default_null_skcipher();

	err = PTR_ERR(ctx->null);

	if (IS_ERR(ctx->null))

		goto out;



	err = aead_geniv_init(crypto_aead_tfm(geniv));

	if (err)

		goto drop_null;



	ctx->geniv.child = geniv->child;

	geniv->child = geniv;



out:

	return err;



drop_null:

	crypto_put_default_null_skcipher();

	goto out;

}



static void echainiv_exit(struct crypto_aead *tfm)

{

	struct echainiv_ctx *ctx = crypto_aead_ctx(tfm);



	crypto_free_aead(ctx->geniv.child);

	crypto_put_default_null_skcipher();

}



static int echainiv_aead_create(struct crypto_template *tmpl,

				struct rtattr **tb)

{
@@ -255,11 +199,11 @@ static int echainiv_aead_create(struct crypto_template *tmpl, 
	inst->alg.encrypt = echainiv_encrypt;

	inst->alg.decrypt = echainiv_decrypt;



	inst->alg.init = echainiv_init;

	inst->alg.exit = echainiv_exit;

	inst->alg.init = aead_init_geniv;

	inst->alg.exit = aead_exit_geniv;



	inst->alg.base.cra_alignmask |= __alignof__(u32) - 1;

	inst->alg.base.cra_ctxsize = sizeof(struct echainiv_ctx);

	inst->alg.base.cra_ctxsize = sizeof(struct aead_geniv_ctx);

	inst->alg.base.cra_ctxsize += inst->alg.ivsize;



	inst->free = aead_geniv_free;