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提交 46309d89 编写于 作者: H Herbert Xu
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crypto: cryptd - Use shash algorithms 

This patch changes cryptd to use shash algorithms instead of the
legacy hash interface.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
上级 7eddf95e
隐藏空白更改
内联 并排
Showing with 84 addition and 80 deletion
crypto/cryptd.c
浏览文件 @ 46309d89
......@@ -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 @@ static struct crypto_instance *cryptd_alloc_instance(struct crypto_alg *alg,
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;
}
......@@ -350,22 +362,22 @@ 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_TFM_REQ_MASK);
err = crypto_hash_setkey(child, key, keylen);
crypto_ahash_set_flags(parent, crypto_hash_get_flags(child) &
CRYPTO_TFM_RES_MASK);
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_shash_setkey(child, key, keylen);
crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) &
CRYPTO_TFM_RES_MASK);
return err;
}
......@@ -385,21 +397,19 @@ 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 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_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
struct crypto_shash *child = ctx->child;
struct ahash_request *req = ahash_request_cast(req_async);
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 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 ahash_request *req = ahash_request_cast(req_async);
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;
......@@ -480,24 +474,19 @@ 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 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_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
struct crypto_shash *child = ctx->child;
struct ahash_request *req = ahash_request_cast(req_async);
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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