Commit 46309d89 authored by Herbert Xu's avatar Herbert Xu
Browse files

crypto: cryptd - Use shash algorithms 



This patch changes cryptd to use shash algorithms instead of the
legacy hash interface.

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 7eddf95e

crypto/cryptd.c

+84 −80
Original line number Diff line number Diff line
@@ -39,6 +39,11 @@ struct cryptd_instance_ctx { 
	struct cryptd_queue *queue;

};



struct hashd_instance_ctx {

	struct crypto_shash_spawn spawn;

	struct cryptd_queue *queue;

};



struct cryptd_blkcipher_ctx {

	struct crypto_blkcipher *child;

};
@@ -48,11 +53,12 @@ struct cryptd_blkcipher_request_ctx { 
};



struct cryptd_hash_ctx {

	struct crypto_hash *child;

	struct crypto_shash *child;

};



struct cryptd_hash_request_ctx {

	crypto_completion_t complete;

	struct shash_desc desc;

};



static void cryptd_queue_worker(struct work_struct *work);
@@ -250,13 +256,12 @@ static void cryptd_blkcipher_exit_tfm(struct crypto_tfm *tfm) 
}



static struct crypto_instance *cryptd_alloc_instance(struct crypto_alg *alg,

						     struct cryptd_queue *queue)

						     unsigned int tail)

{

	struct crypto_instance *inst;

	struct cryptd_instance_ctx *ctx;

	int err;



	inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);

	inst = kzalloc(sizeof(*inst) + tail, GFP_KERNEL);

	if (!inst) {

		inst = ERR_PTR(-ENOMEM);

		goto out;
@@ -267,14 +272,6 @@ static struct crypto_instance *cryptd_alloc_instance(struct crypto_alg *alg, 
		     "cryptd(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)

		goto out_free_inst;



	ctx = crypto_instance_ctx(inst);

	err = crypto_init_spawn(&ctx->spawn, alg, inst,

				CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);

	if (err)

		goto out_free_inst;



	ctx->queue = queue;



	memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);



	inst->alg.cra_priority = alg->cra_priority + 50;
@@ -293,18 +290,28 @@ out_free_inst: 
static struct crypto_instance *cryptd_alloc_blkcipher(

	struct rtattr **tb, struct cryptd_queue *queue)

{

	struct cryptd_instance_ctx *ctx;

	struct crypto_instance *inst;

	struct crypto_alg *alg;

	int err;



	alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_BLKCIPHER,

				  CRYPTO_ALG_TYPE_MASK);

	if (IS_ERR(alg))

		return ERR_CAST(alg);



	inst = cryptd_alloc_instance(alg, queue);

	inst = cryptd_alloc_instance(alg, sizeof(*ctx));

	if (IS_ERR(inst))

		goto out_put_alg;



	ctx = crypto_instance_ctx(inst);

	ctx->queue = queue;



	err = crypto_init_spawn(&ctx->spawn, alg, inst,

				CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);

	if (err)

		goto out_free_inst;



	inst->alg.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC;

	inst->alg.cra_type = &crypto_ablkcipher_type;
@@ -326,23 +333,28 @@ static struct crypto_instance *cryptd_alloc_blkcipher( 
out_put_alg:

	crypto_mod_put(alg);

	return inst;



out_free_inst:

	kfree(inst);

	inst = ERR_PTR(err);

	goto out_put_alg;

}



static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)

{

	struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);

	struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);

	struct crypto_spawn *spawn = &ictx->spawn;

	struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);

	struct crypto_shash_spawn *spawn = &ictx->spawn;

	struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);

	struct crypto_hash *cipher;

	struct crypto_shash *hash;



	cipher = crypto_spawn_hash(spawn);

	if (IS_ERR(cipher))

		return PTR_ERR(cipher);

	hash = crypto_spawn_shash(spawn);

	if (IS_ERR(hash))

		return PTR_ERR(hash);



	ctx->child = cipher;

	tfm->crt_ahash.reqsize =

		sizeof(struct cryptd_hash_request_ctx);

	ctx->child = hash;

	tfm->crt_ahash.reqsize = sizeof(struct cryptd_hash_request_ctx) +

				 crypto_shash_descsize(hash);

	return 0;

}
@@ -350,21 +362,21 @@ static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm) 
{

	struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);



	crypto_free_hash(ctx->child);

	crypto_free_shash(ctx->child);

}



static int cryptd_hash_setkey(struct crypto_ahash *parent,

				   const u8 *key, unsigned int keylen)

{

	struct cryptd_hash_ctx *ctx   = crypto_ahash_ctx(parent);

	struct crypto_hash     *child = ctx->child;

	struct crypto_shash *child = ctx->child;

	int err;



	crypto_hash_clear_flags(child, CRYPTO_TFM_REQ_MASK);

	crypto_hash_set_flags(child, crypto_ahash_get_flags(parent) &

	crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK);

	crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &

				      CRYPTO_TFM_REQ_MASK);

	err = crypto_hash_setkey(child, key, keylen);

	crypto_ahash_set_flags(parent, crypto_hash_get_flags(child) &

	err = crypto_shash_setkey(child, key, keylen);

	crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) &

				       CRYPTO_TFM_RES_MASK);

	return err;

}
@@ -386,20 +398,18 @@ static int cryptd_hash_enqueue(struct ahash_request *req, 
static void cryptd_hash_init(struct crypto_async_request *req_async, int err)

{

	struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);

	struct crypto_hash     *child = ctx->child;

	struct crypto_shash *child = ctx->child;

	struct ahash_request *req = ahash_request_cast(req_async);

	struct cryptd_hash_request_ctx *rctx;

	struct hash_desc desc;



	rctx = ahash_request_ctx(req);

	struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);

	struct shash_desc *desc = &rctx->desc;



	if (unlikely(err == -EINPROGRESS))

		goto out;



	desc.tfm = child;

	desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;

	desc->tfm = child;

	desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;



	err = crypto_hash_crt(child)->init(&desc);

	err = crypto_shash_init(desc);



	req->base.complete = rctx->complete;
@@ -416,23 +426,15 @@ static int cryptd_hash_init_enqueue(struct ahash_request *req) 


static void cryptd_hash_update(struct crypto_async_request *req_async, int err)

{

	struct cryptd_hash_ctx *ctx   = crypto_tfm_ctx(req_async->tfm);

	struct crypto_hash     *child = ctx->child;

	struct ahash_request *req = ahash_request_cast(req_async);

	struct cryptd_hash_request_ctx *rctx;

	struct hash_desc desc;



	rctx = ahash_request_ctx(req);



	if (unlikely(err == -EINPROGRESS))

		goto out;



	desc.tfm = child;

	desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;



	err = crypto_hash_crt(child)->update(&desc,

						req->src,

						req->nbytes);

	err = shash_ahash_update(req, &rctx->desc);



	req->base.complete = rctx->complete;
@@ -449,21 +451,13 @@ static int cryptd_hash_update_enqueue(struct ahash_request *req) 


static void cryptd_hash_final(struct crypto_async_request *req_async, int err)

{

	struct cryptd_hash_ctx *ctx   = crypto_tfm_ctx(req_async->tfm);

	struct crypto_hash     *child = ctx->child;

	struct ahash_request *req = ahash_request_cast(req_async);

	struct cryptd_hash_request_ctx *rctx;

	struct hash_desc desc;



	rctx = ahash_request_ctx(req);

	struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);



	if (unlikely(err == -EINPROGRESS))

		goto out;



	desc.tfm = child;

	desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;



	err = crypto_hash_crt(child)->final(&desc, req->result);

	err = crypto_shash_final(&rctx->desc, req->result);



	req->base.complete = rctx->complete;
@@ -481,23 +475,18 @@ static int cryptd_hash_final_enqueue(struct ahash_request *req) 
static void cryptd_hash_digest(struct crypto_async_request *req_async, int err)

{

	struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);

	struct crypto_hash     *child = ctx->child;

	struct crypto_shash *child = ctx->child;

	struct ahash_request *req = ahash_request_cast(req_async);

	struct cryptd_hash_request_ctx *rctx;

	struct hash_desc desc;



	rctx = ahash_request_ctx(req);

	struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);

	struct shash_desc *desc = &rctx->desc;



	if (unlikely(err == -EINPROGRESS))

		goto out;



	desc.tfm = child;

	desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;

	desc->tfm = child;

	desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;



	err = crypto_hash_crt(child)->digest(&desc,

						req->src,

						req->nbytes,

						req->result);

	err = shash_ahash_digest(req, desc);



	req->base.complete = rctx->complete;
@@ -515,22 +504,32 @@ static int cryptd_hash_digest_enqueue(struct ahash_request *req) 
static struct crypto_instance *cryptd_alloc_hash(

	struct rtattr **tb, struct cryptd_queue *queue)

{

	struct hashd_instance_ctx *ctx;

	struct crypto_instance *inst;

	struct shash_alg *salg;

	struct crypto_alg *alg;

	int err;



	alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_HASH,

				  CRYPTO_ALG_TYPE_HASH_MASK);

	if (IS_ERR(alg))

		return ERR_PTR(PTR_ERR(alg));

	salg = shash_attr_alg(tb[1], 0, 0);

	if (IS_ERR(salg))

		return ERR_CAST(salg);



	inst = cryptd_alloc_instance(alg, queue);

	alg = &salg->base;

	inst = cryptd_alloc_instance(alg, sizeof(*ctx));

	if (IS_ERR(inst))

		goto out_put_alg;



	ctx = crypto_instance_ctx(inst);

	ctx->queue = queue;



	err = crypto_init_shash_spawn(&ctx->spawn, salg, inst);

	if (err)

		goto out_free_inst;



	inst->alg.cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC;

	inst->alg.cra_type = &crypto_ahash_type;



	inst->alg.cra_ahash.digestsize = alg->cra_hash.digestsize;

	inst->alg.cra_ahash.digestsize = salg->digestsize;

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



	inst->alg.cra_init = cryptd_hash_init_tfm;
@@ -545,6 +544,11 @@ static struct crypto_instance *cryptd_alloc_hash( 
out_put_alg:

	crypto_mod_put(alg);

	return inst;



out_free_inst:

	kfree(inst);

	inst = ERR_PTR(err);

	goto out_put_alg;

}



static struct cryptd_queue queue;

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