[CRYPTO] cryptd: Add asynchronous hash support
This patch adds asynchronous hash support to crypto daemon. Signed-off-by: Loc Ho <lho@amcc.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Loc Ho
Herbert Xu
Родитель
004a403c2e
Коммит
b8a28251c2
|
|
@ -65,6 +65,7 @@ config CRYPTO_NULL
|
|||
config CRYPTO_CRYPTD
|
||||
tristate "Software async crypto daemon"
|
||||
select CRYPTO_BLKCIPHER
|
||||
select CRYPTO_HASH
|
||||
select CRYPTO_MANAGER
|
||||
help
|
||||
This is a generic software asynchronous crypto daemon that
|
||||
|
|
|
|||
243
crypto/cryptd.c
243
crypto/cryptd.c
|
|
@ -45,6 +45,13 @@ struct cryptd_blkcipher_request_ctx {
|
|||
crypto_completion_t complete;
|
||||
};
|
||||
|
||||
struct cryptd_hash_ctx {
|
||||
struct crypto_hash *child;
|
||||
};
|
||||
|
||||
struct cryptd_hash_request_ctx {
|
||||
crypto_completion_t complete;
|
||||
};
|
||||
|
||||
static inline struct cryptd_state *cryptd_get_state(struct crypto_tfm *tfm)
|
||||
{
|
||||
|
|
@ -260,6 +267,240 @@ out_put_alg:
|
|||
return inst;
|
||||
}
|
||||
|
||||
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 cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
struct crypto_hash *cipher;
|
||||
|
||||
cipher = crypto_spawn_hash(spawn);
|
||||
if (IS_ERR(cipher))
|
||||
return PTR_ERR(cipher);
|
||||
|
||||
ctx->child = cipher;
|
||||
tfm->crt_ahash.reqsize =
|
||||
sizeof(struct cryptd_hash_request_ctx);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
|
||||
{
|
||||
struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
struct cryptd_state *state = cryptd_get_state(tfm);
|
||||
int active;
|
||||
|
||||
mutex_lock(&state->mutex);
|
||||
active = ahash_tfm_in_queue(&state->queue,
|
||||
__crypto_ahash_cast(tfm));
|
||||
mutex_unlock(&state->mutex);
|
||||
|
||||
BUG_ON(active);
|
||||
|
||||
crypto_free_hash(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;
|
||||
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);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int cryptd_hash_enqueue(struct ahash_request *req,
|
||||
crypto_completion_t complete)
|
||||
{
|
||||
struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
|
||||
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
|
||||
struct cryptd_state *state =
|
||||
cryptd_get_state(crypto_ahash_tfm(tfm));
|
||||
int err;
|
||||
|
||||
rctx->complete = req->base.complete;
|
||||
req->base.complete = complete;
|
||||
|
||||
spin_lock_bh(&state->lock);
|
||||
err = ahash_enqueue_request(&state->queue, req);
|
||||
spin_unlock_bh(&state->lock);
|
||||
|
||||
wake_up_process(state->task);
|
||||
return err;
|
||||
}
|
||||
|
||||
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);
|
||||
|
||||
if (unlikely(err == -EINPROGRESS))
|
||||
goto out;
|
||||
|
||||
desc.tfm = child;
|
||||
desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
|
||||
|
||||
err = crypto_hash_crt(child)->init(&desc);
|
||||
|
||||
req->base.complete = rctx->complete;
|
||||
|
||||
out:
|
||||
local_bh_disable();
|
||||
rctx->complete(&req->base, err);
|
||||
local_bh_enable();
|
||||
}
|
||||
|
||||
static int cryptd_hash_init_enqueue(struct ahash_request *req)
|
||||
{
|
||||
return cryptd_hash_enqueue(req, cryptd_hash_init);
|
||||
}
|
||||
|
||||
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);
|
||||
|
||||
req->base.complete = rctx->complete;
|
||||
|
||||
out:
|
||||
local_bh_disable();
|
||||
rctx->complete(&req->base, err);
|
||||
local_bh_enable();
|
||||
}
|
||||
|
||||
static int cryptd_hash_update_enqueue(struct ahash_request *req)
|
||||
{
|
||||
return cryptd_hash_enqueue(req, cryptd_hash_update);
|
||||
}
|
||||
|
||||
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);
|
||||
|
||||
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);
|
||||
|
||||
req->base.complete = rctx->complete;
|
||||
|
||||
out:
|
||||
local_bh_disable();
|
||||
rctx->complete(&req->base, err);
|
||||
local_bh_enable();
|
||||
}
|
||||
|
||||
static int cryptd_hash_final_enqueue(struct ahash_request *req)
|
||||
{
|
||||
return cryptd_hash_enqueue(req, cryptd_hash_final);
|
||||
}
|
||||
|
||||
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);
|
||||
|
||||
if (unlikely(err == -EINPROGRESS))
|
||||
goto out;
|
||||
|
||||
desc.tfm = child;
|
||||
desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
|
||||
|
||||
err = crypto_hash_crt(child)->digest(&desc,
|
||||
req->src,
|
||||
req->nbytes,
|
||||
req->result);
|
||||
|
||||
req->base.complete = rctx->complete;
|
||||
|
||||
out:
|
||||
local_bh_disable();
|
||||
rctx->complete(&req->base, err);
|
||||
local_bh_enable();
|
||||
}
|
||||
|
||||
static int cryptd_hash_digest_enqueue(struct ahash_request *req)
|
||||
{
|
||||
return cryptd_hash_enqueue(req, cryptd_hash_digest);
|
||||
}
|
||||
|
||||
static struct crypto_instance *cryptd_alloc_hash(
|
||||
struct rtattr **tb, struct cryptd_state *state)
|
||||
{
|
||||
struct crypto_instance *inst;
|
||||
struct crypto_alg *alg;
|
||||
|
||||
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));
|
||||
|
||||
inst = cryptd_alloc_instance(alg, state);
|
||||
if (IS_ERR(inst))
|
||||
goto out_put_alg;
|
||||
|
||||
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_ctxsize = sizeof(struct cryptd_hash_ctx);
|
||||
|
||||
inst->alg.cra_init = cryptd_hash_init_tfm;
|
||||
inst->alg.cra_exit = cryptd_hash_exit_tfm;
|
||||
|
||||
inst->alg.cra_ahash.init = cryptd_hash_init_enqueue;
|
||||
inst->alg.cra_ahash.update = cryptd_hash_update_enqueue;
|
||||
inst->alg.cra_ahash.final = cryptd_hash_final_enqueue;
|
||||
inst->alg.cra_ahash.setkey = cryptd_hash_setkey;
|
||||
inst->alg.cra_ahash.digest = cryptd_hash_digest_enqueue;
|
||||
|
||||
out_put_alg:
|
||||
crypto_mod_put(alg);
|
||||
return inst;
|
||||
}
|
||||
|
||||
static struct cryptd_state state;
|
||||
|
||||
static struct crypto_instance *cryptd_alloc(struct rtattr **tb)
|
||||
|
|
@ -273,6 +514,8 @@ static struct crypto_instance *cryptd_alloc(struct rtattr **tb)
|
|||
switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
|
||||
case CRYPTO_ALG_TYPE_BLKCIPHER:
|
||||
return cryptd_alloc_blkcipher(tb, &state);
|
||||
case CRYPTO_ALG_TYPE_DIGEST:
|
||||
return cryptd_alloc_hash(tb, &state);
|
||||
}
|
||||
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче