mirror of https://gitee.com/openkylin/linux.git
crypto: cryptd - Use shash algorithms
This patch changes cryptd to use shash algorithms instead of the legacy hash interface. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
parent
7eddf95ec5
commit
46309d8938
148
crypto/cryptd.c
148
crypto/cryptd.c
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@ -39,6 +39,11 @@ struct cryptd_instance_ctx {
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struct cryptd_queue *queue;
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};
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struct hashd_instance_ctx {
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struct crypto_shash_spawn spawn;
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struct cryptd_queue *queue;
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};
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struct cryptd_blkcipher_ctx {
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struct crypto_blkcipher *child;
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};
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@ -48,11 +53,12 @@ struct cryptd_blkcipher_request_ctx {
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};
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struct cryptd_hash_ctx {
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struct crypto_hash *child;
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struct crypto_shash *child;
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};
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struct cryptd_hash_request_ctx {
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crypto_completion_t complete;
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struct shash_desc desc;
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};
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static void cryptd_queue_worker(struct work_struct *work);
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@ -250,13 +256,12 @@ static void cryptd_blkcipher_exit_tfm(struct crypto_tfm *tfm)
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}
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static struct crypto_instance *cryptd_alloc_instance(struct crypto_alg *alg,
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struct cryptd_queue *queue)
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unsigned int tail)
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{
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struct crypto_instance *inst;
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struct cryptd_instance_ctx *ctx;
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int err;
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inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
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inst = kzalloc(sizeof(*inst) + tail, GFP_KERNEL);
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if (!inst) {
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inst = ERR_PTR(-ENOMEM);
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goto out;
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@ -267,14 +272,6 @@ static struct crypto_instance *cryptd_alloc_instance(struct crypto_alg *alg,
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"cryptd(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
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goto out_free_inst;
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ctx = crypto_instance_ctx(inst);
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err = crypto_init_spawn(&ctx->spawn, alg, inst,
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CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
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if (err)
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goto out_free_inst;
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ctx->queue = queue;
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memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
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inst->alg.cra_priority = alg->cra_priority + 50;
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@ -293,18 +290,28 @@ static struct crypto_instance *cryptd_alloc_instance(struct crypto_alg *alg,
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static struct crypto_instance *cryptd_alloc_blkcipher(
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struct rtattr **tb, struct cryptd_queue *queue)
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{
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struct cryptd_instance_ctx *ctx;
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struct crypto_instance *inst;
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struct crypto_alg *alg;
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int err;
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alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_BLKCIPHER,
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CRYPTO_ALG_TYPE_MASK);
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if (IS_ERR(alg))
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return ERR_CAST(alg);
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inst = cryptd_alloc_instance(alg, queue);
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inst = cryptd_alloc_instance(alg, sizeof(*ctx));
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if (IS_ERR(inst))
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goto out_put_alg;
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ctx = crypto_instance_ctx(inst);
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ctx->queue = queue;
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err = crypto_init_spawn(&ctx->spawn, alg, inst,
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CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
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if (err)
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goto out_free_inst;
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inst->alg.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC;
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inst->alg.cra_type = &crypto_ablkcipher_type;
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@ -326,23 +333,28 @@ static struct crypto_instance *cryptd_alloc_blkcipher(
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out_put_alg:
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crypto_mod_put(alg);
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return inst;
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out_free_inst:
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kfree(inst);
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inst = ERR_PTR(err);
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goto out_put_alg;
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}
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static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)
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{
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struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
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struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
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struct crypto_spawn *spawn = &ictx->spawn;
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struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);
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struct crypto_shash_spawn *spawn = &ictx->spawn;
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struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
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struct crypto_hash *cipher;
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struct crypto_shash *hash;
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cipher = crypto_spawn_hash(spawn);
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if (IS_ERR(cipher))
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return PTR_ERR(cipher);
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hash = crypto_spawn_shash(spawn);
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if (IS_ERR(hash))
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return PTR_ERR(hash);
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ctx->child = cipher;
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tfm->crt_ahash.reqsize =
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sizeof(struct cryptd_hash_request_ctx);
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ctx->child = hash;
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tfm->crt_ahash.reqsize = sizeof(struct cryptd_hash_request_ctx) +
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crypto_shash_descsize(hash);
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return 0;
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}
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@ -350,21 +362,21 @@ static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
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{
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struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
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crypto_free_hash(ctx->child);
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crypto_free_shash(ctx->child);
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}
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static int cryptd_hash_setkey(struct crypto_ahash *parent,
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const u8 *key, unsigned int keylen)
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{
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struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent);
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struct crypto_hash *child = ctx->child;
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struct crypto_shash *child = ctx->child;
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int err;
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crypto_hash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
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crypto_hash_set_flags(child, crypto_ahash_get_flags(parent) &
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crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
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crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &
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CRYPTO_TFM_REQ_MASK);
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err = crypto_hash_setkey(child, key, keylen);
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crypto_ahash_set_flags(parent, crypto_hash_get_flags(child) &
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err = crypto_shash_setkey(child, key, keylen);
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crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) &
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CRYPTO_TFM_RES_MASK);
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return err;
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}
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@ -386,20 +398,18 @@ static int cryptd_hash_enqueue(struct ahash_request *req,
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static void cryptd_hash_init(struct crypto_async_request *req_async, int err)
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{
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struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
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struct crypto_hash *child = ctx->child;
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struct crypto_shash *child = ctx->child;
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struct ahash_request *req = ahash_request_cast(req_async);
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struct cryptd_hash_request_ctx *rctx;
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struct hash_desc desc;
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rctx = ahash_request_ctx(req);
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struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
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struct shash_desc *desc = &rctx->desc;
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if (unlikely(err == -EINPROGRESS))
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goto out;
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desc.tfm = child;
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desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
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desc->tfm = child;
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desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
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err = crypto_hash_crt(child)->init(&desc);
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err = crypto_shash_init(desc);
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req->base.complete = rctx->complete;
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@ -416,23 +426,15 @@ static int cryptd_hash_init_enqueue(struct ahash_request *req)
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static void cryptd_hash_update(struct crypto_async_request *req_async, int err)
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{
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struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
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struct crypto_hash *child = ctx->child;
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struct ahash_request *req = ahash_request_cast(req_async);
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struct cryptd_hash_request_ctx *rctx;
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struct hash_desc desc;
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rctx = ahash_request_ctx(req);
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if (unlikely(err == -EINPROGRESS))
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goto out;
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desc.tfm = child;
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desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
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err = crypto_hash_crt(child)->update(&desc,
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req->src,
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req->nbytes);
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err = shash_ahash_update(req, &rctx->desc);
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req->base.complete = rctx->complete;
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@ -449,21 +451,13 @@ static int cryptd_hash_update_enqueue(struct ahash_request *req)
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static void cryptd_hash_final(struct crypto_async_request *req_async, int err)
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{
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struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
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struct crypto_hash *child = ctx->child;
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struct ahash_request *req = ahash_request_cast(req_async);
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struct cryptd_hash_request_ctx *rctx;
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struct hash_desc desc;
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rctx = ahash_request_ctx(req);
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struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
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if (unlikely(err == -EINPROGRESS))
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goto out;
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desc.tfm = child;
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desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
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err = crypto_hash_crt(child)->final(&desc, req->result);
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err = crypto_shash_final(&rctx->desc, req->result);
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req->base.complete = rctx->complete;
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@ -481,23 +475,18 @@ static int cryptd_hash_final_enqueue(struct ahash_request *req)
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static void cryptd_hash_digest(struct crypto_async_request *req_async, int err)
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{
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struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
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struct crypto_hash *child = ctx->child;
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struct crypto_shash *child = ctx->child;
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struct ahash_request *req = ahash_request_cast(req_async);
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struct cryptd_hash_request_ctx *rctx;
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struct hash_desc desc;
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rctx = ahash_request_ctx(req);
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struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
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struct shash_desc *desc = &rctx->desc;
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if (unlikely(err == -EINPROGRESS))
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goto out;
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desc.tfm = child;
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desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
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desc->tfm = child;
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desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
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err = crypto_hash_crt(child)->digest(&desc,
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req->src,
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req->nbytes,
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req->result);
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err = shash_ahash_digest(req, desc);
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req->base.complete = rctx->complete;
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@ -515,22 +504,32 @@ static int cryptd_hash_digest_enqueue(struct ahash_request *req)
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static struct crypto_instance *cryptd_alloc_hash(
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struct rtattr **tb, struct cryptd_queue *queue)
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{
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struct hashd_instance_ctx *ctx;
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struct crypto_instance *inst;
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struct shash_alg *salg;
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struct crypto_alg *alg;
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int err;
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alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_HASH,
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CRYPTO_ALG_TYPE_HASH_MASK);
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if (IS_ERR(alg))
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return ERR_PTR(PTR_ERR(alg));
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salg = shash_attr_alg(tb[1], 0, 0);
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if (IS_ERR(salg))
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return ERR_CAST(salg);
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inst = cryptd_alloc_instance(alg, queue);
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alg = &salg->base;
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inst = cryptd_alloc_instance(alg, sizeof(*ctx));
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if (IS_ERR(inst))
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goto out_put_alg;
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ctx = crypto_instance_ctx(inst);
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ctx->queue = queue;
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err = crypto_init_shash_spawn(&ctx->spawn, salg, inst);
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if (err)
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goto out_free_inst;
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inst->alg.cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC;
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inst->alg.cra_type = &crypto_ahash_type;
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inst->alg.cra_ahash.digestsize = alg->cra_hash.digestsize;
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inst->alg.cra_ahash.digestsize = salg->digestsize;
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inst->alg.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
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inst->alg.cra_init = cryptd_hash_init_tfm;
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@ -545,6 +544,11 @@ static struct crypto_instance *cryptd_alloc_hash(
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out_put_alg:
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crypto_mod_put(alg);
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return inst;
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out_free_inst:
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kfree(inst);
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inst = ERR_PTR(err);
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goto out_put_alg;
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}
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static struct cryptd_queue queue;
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