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-rw-r--r--crypto/cryptd.c1102
1 files changed, 1102 insertions, 0 deletions
diff --git a/crypto/cryptd.c b/crypto/cryptd.c
new file mode 100644
index 000000000..ca3a40fc7
--- /dev/null
+++ b/crypto/cryptd.c
@@ -0,0 +1,1102 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Software async crypto daemon.
+ *
+ * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
+ *
+ * Added AEAD support to cryptd.
+ * Authors: Tadeusz Struk (tadeusz.struk@intel.com)
+ * Adrian Hoban <adrian.hoban@intel.com>
+ * Gabriele Paoloni <gabriele.paoloni@intel.com>
+ * Aidan O'Mahony (aidan.o.mahony@intel.com)
+ * Copyright (c) 2010, Intel Corporation.
+ */
+
+#include <crypto/internal/hash.h>
+#include <crypto/internal/aead.h>
+#include <crypto/internal/skcipher.h>
+#include <crypto/cryptd.h>
+#include <linux/refcount.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/scatterlist.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+
+static unsigned int cryptd_max_cpu_qlen = 1000;
+module_param(cryptd_max_cpu_qlen, uint, 0);
+MODULE_PARM_DESC(cryptd_max_cpu_qlen, "Set cryptd Max queue depth");
+
+static struct workqueue_struct *cryptd_wq;
+
+struct cryptd_cpu_queue {
+ struct crypto_queue queue;
+ struct work_struct work;
+};
+
+struct cryptd_queue {
+ /*
+ * Protected by disabling BH to allow enqueueing from softinterrupt and
+ * dequeuing from kworker (cryptd_queue_worker()).
+ */
+ struct cryptd_cpu_queue __percpu *cpu_queue;
+};
+
+struct cryptd_instance_ctx {
+ struct crypto_spawn spawn;
+ struct cryptd_queue *queue;
+};
+
+struct skcipherd_instance_ctx {
+ struct crypto_skcipher_spawn spawn;
+ struct cryptd_queue *queue;
+};
+
+struct hashd_instance_ctx {
+ struct crypto_shash_spawn spawn;
+ struct cryptd_queue *queue;
+};
+
+struct aead_instance_ctx {
+ struct crypto_aead_spawn aead_spawn;
+ struct cryptd_queue *queue;
+};
+
+struct cryptd_skcipher_ctx {
+ refcount_t refcnt;
+ struct crypto_skcipher *child;
+};
+
+struct cryptd_skcipher_request_ctx {
+ crypto_completion_t complete;
+ struct skcipher_request req;
+};
+
+struct cryptd_hash_ctx {
+ refcount_t refcnt;
+ struct crypto_shash *child;
+};
+
+struct cryptd_hash_request_ctx {
+ crypto_completion_t complete;
+ struct shash_desc desc;
+};
+
+struct cryptd_aead_ctx {
+ refcount_t refcnt;
+ struct crypto_aead *child;
+};
+
+struct cryptd_aead_request_ctx {
+ crypto_completion_t complete;
+};
+
+static void cryptd_queue_worker(struct work_struct *work);
+
+static int cryptd_init_queue(struct cryptd_queue *queue,
+ unsigned int max_cpu_qlen)
+{
+ int cpu;
+ struct cryptd_cpu_queue *cpu_queue;
+
+ queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue);
+ if (!queue->cpu_queue)
+ return -ENOMEM;
+ for_each_possible_cpu(cpu) {
+ cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
+ crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
+ INIT_WORK(&cpu_queue->work, cryptd_queue_worker);
+ }
+ pr_info("cryptd: max_cpu_qlen set to %d\n", max_cpu_qlen);
+ return 0;
+}
+
+static void cryptd_fini_queue(struct cryptd_queue *queue)
+{
+ int cpu;
+ struct cryptd_cpu_queue *cpu_queue;
+
+ for_each_possible_cpu(cpu) {
+ cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
+ BUG_ON(cpu_queue->queue.qlen);
+ }
+ free_percpu(queue->cpu_queue);
+}
+
+static int cryptd_enqueue_request(struct cryptd_queue *queue,
+ struct crypto_async_request *request)
+{
+ int err;
+ struct cryptd_cpu_queue *cpu_queue;
+ refcount_t *refcnt;
+
+ local_bh_disable();
+ cpu_queue = this_cpu_ptr(queue->cpu_queue);
+ err = crypto_enqueue_request(&cpu_queue->queue, request);
+
+ refcnt = crypto_tfm_ctx(request->tfm);
+
+ if (err == -ENOSPC)
+ goto out;
+
+ queue_work_on(smp_processor_id(), cryptd_wq, &cpu_queue->work);
+
+ if (!refcount_read(refcnt))
+ goto out;
+
+ refcount_inc(refcnt);
+
+out:
+ local_bh_enable();
+
+ return err;
+}
+
+/* Called in workqueue context, do one real cryption work (via
+ * req->complete) and reschedule itself if there are more work to
+ * do. */
+static void cryptd_queue_worker(struct work_struct *work)
+{
+ struct cryptd_cpu_queue *cpu_queue;
+ struct crypto_async_request *req, *backlog;
+
+ cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
+ /*
+ * Only handle one request at a time to avoid hogging crypto workqueue.
+ */
+ local_bh_disable();
+ backlog = crypto_get_backlog(&cpu_queue->queue);
+ req = crypto_dequeue_request(&cpu_queue->queue);
+ local_bh_enable();
+
+ if (!req)
+ return;
+
+ if (backlog)
+ backlog->complete(backlog, -EINPROGRESS);
+ req->complete(req, 0);
+
+ if (cpu_queue->queue.qlen)
+ queue_work(cryptd_wq, &cpu_queue->work);
+}
+
+static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm)
+{
+ struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
+ struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
+ return ictx->queue;
+}
+
+static void cryptd_type_and_mask(struct crypto_attr_type *algt,
+ u32 *type, u32 *mask)
+{
+ /*
+ * cryptd is allowed to wrap internal algorithms, but in that case the
+ * resulting cryptd instance will be marked as internal as well.
+ */
+ *type = algt->type & CRYPTO_ALG_INTERNAL;
+ *mask = algt->mask & CRYPTO_ALG_INTERNAL;
+
+ /* No point in cryptd wrapping an algorithm that's already async. */
+ *mask |= CRYPTO_ALG_ASYNC;
+
+ *mask |= crypto_algt_inherited_mask(algt);
+}
+
+static int cryptd_init_instance(struct crypto_instance *inst,
+ struct crypto_alg *alg)
+{
+ if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
+ "cryptd(%s)",
+ alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
+ return -ENAMETOOLONG;
+
+ memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
+
+ inst->alg.cra_priority = alg->cra_priority + 50;
+ inst->alg.cra_blocksize = alg->cra_blocksize;
+ inst->alg.cra_alignmask = alg->cra_alignmask;
+
+ return 0;
+}
+
+static int cryptd_skcipher_setkey(struct crypto_skcipher *parent,
+ const u8 *key, unsigned int keylen)
+{
+ struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent);
+ struct crypto_skcipher *child = ctx->child;
+
+ crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
+ crypto_skcipher_set_flags(child,
+ crypto_skcipher_get_flags(parent) &
+ CRYPTO_TFM_REQ_MASK);
+ return crypto_skcipher_setkey(child, key, keylen);
+}
+
+static void cryptd_skcipher_complete(struct skcipher_request *req, int err)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
+ int refcnt = refcount_read(&ctx->refcnt);
+
+ local_bh_disable();
+ rctx->complete(&req->base, err);
+ local_bh_enable();
+
+ if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt))
+ crypto_free_skcipher(tfm);
+}
+
+static void cryptd_skcipher_encrypt(struct crypto_async_request *base,
+ int err)
+{
+ struct skcipher_request *req = skcipher_request_cast(base);
+ struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct skcipher_request *subreq = &rctx->req;
+ struct crypto_skcipher *child = ctx->child;
+
+ if (unlikely(err == -EINPROGRESS))
+ goto out;
+
+ skcipher_request_set_tfm(subreq, child);
+ skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
+ NULL, NULL);
+ skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
+ req->iv);
+
+ err = crypto_skcipher_encrypt(subreq);
+ skcipher_request_zero(subreq);
+
+ req->base.complete = rctx->complete;
+
+out:
+ cryptd_skcipher_complete(req, err);
+}
+
+static void cryptd_skcipher_decrypt(struct crypto_async_request *base,
+ int err)
+{
+ struct skcipher_request *req = skcipher_request_cast(base);
+ struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct skcipher_request *subreq = &rctx->req;
+ struct crypto_skcipher *child = ctx->child;
+
+ if (unlikely(err == -EINPROGRESS))
+ goto out;
+
+ skcipher_request_set_tfm(subreq, child);
+ skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
+ NULL, NULL);
+ skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
+ req->iv);
+
+ err = crypto_skcipher_decrypt(subreq);
+ skcipher_request_zero(subreq);
+
+ req->base.complete = rctx->complete;
+
+out:
+ cryptd_skcipher_complete(req, err);
+}
+
+static int cryptd_skcipher_enqueue(struct skcipher_request *req,
+ crypto_completion_t compl)
+{
+ struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct cryptd_queue *queue;
+
+ queue = cryptd_get_queue(crypto_skcipher_tfm(tfm));
+ rctx->complete = req->base.complete;
+ req->base.complete = compl;
+
+ return cryptd_enqueue_request(queue, &req->base);
+}
+
+static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req)
+{
+ return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt);
+}
+
+static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req)
+{
+ return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt);
+}
+
+static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm)
+{
+ struct skcipher_instance *inst = skcipher_alg_instance(tfm);
+ struct skcipherd_instance_ctx *ictx = skcipher_instance_ctx(inst);
+ struct crypto_skcipher_spawn *spawn = &ictx->spawn;
+ struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct crypto_skcipher *cipher;
+
+ cipher = crypto_spawn_skcipher(spawn);
+ if (IS_ERR(cipher))
+ return PTR_ERR(cipher);
+
+ ctx->child = cipher;
+ crypto_skcipher_set_reqsize(
+ tfm, sizeof(struct cryptd_skcipher_request_ctx) +
+ crypto_skcipher_reqsize(cipher));
+ return 0;
+}
+
+static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm)
+{
+ struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+
+ crypto_free_skcipher(ctx->child);
+}
+
+static void cryptd_skcipher_free(struct skcipher_instance *inst)
+{
+ struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst);
+
+ crypto_drop_skcipher(&ctx->spawn);
+ kfree(inst);
+}
+
+static int cryptd_create_skcipher(struct crypto_template *tmpl,
+ struct rtattr **tb,
+ struct crypto_attr_type *algt,
+ struct cryptd_queue *queue)
+{
+ struct skcipherd_instance_ctx *ctx;
+ struct skcipher_instance *inst;
+ struct skcipher_alg *alg;
+ u32 type;
+ u32 mask;
+ int err;
+
+ cryptd_type_and_mask(algt, &type, &mask);
+
+ inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
+ if (!inst)
+ return -ENOMEM;
+
+ ctx = skcipher_instance_ctx(inst);
+ ctx->queue = queue;
+
+ err = crypto_grab_skcipher(&ctx->spawn, skcipher_crypto_instance(inst),
+ crypto_attr_alg_name(tb[1]), type, mask);
+ if (err)
+ goto err_free_inst;
+
+ alg = crypto_spawn_skcipher_alg(&ctx->spawn);
+ err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base);
+ if (err)
+ goto err_free_inst;
+
+ inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC |
+ (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
+ inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg);
+ inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg);
+ inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg);
+ inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg);
+
+ inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx);
+
+ inst->alg.init = cryptd_skcipher_init_tfm;
+ inst->alg.exit = cryptd_skcipher_exit_tfm;
+
+ inst->alg.setkey = cryptd_skcipher_setkey;
+ inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue;
+ inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue;
+
+ inst->free = cryptd_skcipher_free;
+
+ err = skcipher_register_instance(tmpl, inst);
+ if (err) {
+err_free_inst:
+ cryptd_skcipher_free(inst);
+ }
+ return err;
+}
+
+static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)
+{
+ struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
+ 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_shash *hash;
+
+ hash = crypto_spawn_shash(spawn);
+ if (IS_ERR(hash))
+ return PTR_ERR(hash);
+
+ ctx->child = hash;
+ crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
+ sizeof(struct cryptd_hash_request_ctx) +
+ crypto_shash_descsize(hash));
+ return 0;
+}
+
+static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
+{
+ struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ 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_shash *child = ctx->child;
+
+ crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
+ crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &
+ CRYPTO_TFM_REQ_MASK);
+ return crypto_shash_setkey(child, key, keylen);
+}
+
+static int cryptd_hash_enqueue(struct ahash_request *req,
+ crypto_completion_t compl)
+{
+ struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct cryptd_queue *queue =
+ cryptd_get_queue(crypto_ahash_tfm(tfm));
+
+ rctx->complete = req->base.complete;
+ req->base.complete = compl;
+
+ return cryptd_enqueue_request(queue, &req->base);
+}
+
+static void cryptd_hash_complete(struct ahash_request *req, int err)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+ struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
+ int refcnt = refcount_read(&ctx->refcnt);
+
+ local_bh_disable();
+ rctx->complete(&req->base, err);
+ local_bh_enable();
+
+ if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt))
+ crypto_free_ahash(tfm);
+}
+
+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_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;
+
+ err = crypto_shash_init(desc);
+
+ req->base.complete = rctx->complete;
+
+out:
+ cryptd_hash_complete(req, err);
+}
+
+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 ahash_request *req = ahash_request_cast(req_async);
+ struct cryptd_hash_request_ctx *rctx;
+
+ rctx = ahash_request_ctx(req);
+
+ if (unlikely(err == -EINPROGRESS))
+ goto out;
+
+ err = shash_ahash_update(req, &rctx->desc);
+
+ req->base.complete = rctx->complete;
+
+out:
+ cryptd_hash_complete(req, err);
+}
+
+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 ahash_request *req = ahash_request_cast(req_async);
+ struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
+
+ if (unlikely(err == -EINPROGRESS))
+ goto out;
+
+ err = crypto_shash_final(&rctx->desc, req->result);
+
+ req->base.complete = rctx->complete;
+
+out:
+ cryptd_hash_complete(req, err);
+}
+
+static int cryptd_hash_final_enqueue(struct ahash_request *req)
+{
+ return cryptd_hash_enqueue(req, cryptd_hash_final);
+}
+
+static void cryptd_hash_finup(struct crypto_async_request *req_async, int err)
+{
+ 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;
+
+ err = shash_ahash_finup(req, &rctx->desc);
+
+ req->base.complete = rctx->complete;
+
+out:
+ cryptd_hash_complete(req, err);
+}
+
+static int cryptd_hash_finup_enqueue(struct ahash_request *req)
+{
+ return cryptd_hash_enqueue(req, cryptd_hash_finup);
+}
+
+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_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;
+
+ err = shash_ahash_digest(req, desc);
+
+ req->base.complete = rctx->complete;
+
+out:
+ cryptd_hash_complete(req, err);
+}
+
+static int cryptd_hash_digest_enqueue(struct ahash_request *req)
+{
+ return cryptd_hash_enqueue(req, cryptd_hash_digest);
+}
+
+static int cryptd_hash_export(struct ahash_request *req, void *out)
+{
+ struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
+
+ return crypto_shash_export(&rctx->desc, out);
+}
+
+static int cryptd_hash_import(struct ahash_request *req, const void *in)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+ struct shash_desc *desc = cryptd_shash_desc(req);
+
+ desc->tfm = ctx->child;
+
+ return crypto_shash_import(desc, in);
+}
+
+static void cryptd_hash_free(struct ahash_instance *inst)
+{
+ struct hashd_instance_ctx *ctx = ahash_instance_ctx(inst);
+
+ crypto_drop_shash(&ctx->spawn);
+ kfree(inst);
+}
+
+static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
+ struct crypto_attr_type *algt,
+ struct cryptd_queue *queue)
+{
+ struct hashd_instance_ctx *ctx;
+ struct ahash_instance *inst;
+ struct shash_alg *alg;
+ u32 type;
+ u32 mask;
+ int err;
+
+ cryptd_type_and_mask(algt, &type, &mask);
+
+ inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
+ if (!inst)
+ return -ENOMEM;
+
+ ctx = ahash_instance_ctx(inst);
+ ctx->queue = queue;
+
+ err = crypto_grab_shash(&ctx->spawn, ahash_crypto_instance(inst),
+ crypto_attr_alg_name(tb[1]), type, mask);
+ if (err)
+ goto err_free_inst;
+ alg = crypto_spawn_shash_alg(&ctx->spawn);
+
+ err = cryptd_init_instance(ahash_crypto_instance(inst), &alg->base);
+ if (err)
+ goto err_free_inst;
+
+ inst->alg.halg.base.cra_flags |= CRYPTO_ALG_ASYNC |
+ (alg->base.cra_flags & (CRYPTO_ALG_INTERNAL|
+ CRYPTO_ALG_OPTIONAL_KEY));
+ inst->alg.halg.digestsize = alg->digestsize;
+ inst->alg.halg.statesize = alg->statesize;
+ inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
+
+ inst->alg.halg.base.cra_init = cryptd_hash_init_tfm;
+ inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm;
+
+ inst->alg.init = cryptd_hash_init_enqueue;
+ inst->alg.update = cryptd_hash_update_enqueue;
+ inst->alg.final = cryptd_hash_final_enqueue;
+ inst->alg.finup = cryptd_hash_finup_enqueue;
+ inst->alg.export = cryptd_hash_export;
+ inst->alg.import = cryptd_hash_import;
+ if (crypto_shash_alg_has_setkey(alg))
+ inst->alg.setkey = cryptd_hash_setkey;
+ inst->alg.digest = cryptd_hash_digest_enqueue;
+
+ inst->free = cryptd_hash_free;
+
+ err = ahash_register_instance(tmpl, inst);
+ if (err) {
+err_free_inst:
+ cryptd_hash_free(inst);
+ }
+ return err;
+}
+
+static int cryptd_aead_setkey(struct crypto_aead *parent,
+ const u8 *key, unsigned int keylen)
+{
+ struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
+ struct crypto_aead *child = ctx->child;
+
+ return crypto_aead_setkey(child, key, keylen);
+}
+
+static int cryptd_aead_setauthsize(struct crypto_aead *parent,
+ unsigned int authsize)
+{
+ struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
+ struct crypto_aead *child = ctx->child;
+
+ return crypto_aead_setauthsize(child, authsize);
+}
+
+static void cryptd_aead_crypt(struct aead_request *req,
+ struct crypto_aead *child,
+ int err,
+ int (*crypt)(struct aead_request *req))
+{
+ struct cryptd_aead_request_ctx *rctx;
+ struct cryptd_aead_ctx *ctx;
+ crypto_completion_t compl;
+ struct crypto_aead *tfm;
+ int refcnt;
+
+ rctx = aead_request_ctx(req);
+ compl = rctx->complete;
+
+ tfm = crypto_aead_reqtfm(req);
+
+ if (unlikely(err == -EINPROGRESS))
+ goto out;
+ aead_request_set_tfm(req, child);
+ err = crypt( req );
+
+out:
+ ctx = crypto_aead_ctx(tfm);
+ refcnt = refcount_read(&ctx->refcnt);
+
+ local_bh_disable();
+ compl(&req->base, err);
+ local_bh_enable();
+
+ if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt))
+ crypto_free_aead(tfm);
+}
+
+static void cryptd_aead_encrypt(struct crypto_async_request *areq, int err)
+{
+ struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
+ struct crypto_aead *child = ctx->child;
+ struct aead_request *req;
+
+ req = container_of(areq, struct aead_request, base);
+ cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt);
+}
+
+static void cryptd_aead_decrypt(struct crypto_async_request *areq, int err)
+{
+ struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
+ struct crypto_aead *child = ctx->child;
+ struct aead_request *req;
+
+ req = container_of(areq, struct aead_request, base);
+ cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt);
+}
+
+static int cryptd_aead_enqueue(struct aead_request *req,
+ crypto_completion_t compl)
+{
+ struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req);
+ struct crypto_aead *tfm = crypto_aead_reqtfm(req);
+ struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm));
+
+ rctx->complete = req->base.complete;
+ req->base.complete = compl;
+ return cryptd_enqueue_request(queue, &req->base);
+}
+
+static int cryptd_aead_encrypt_enqueue(struct aead_request *req)
+{
+ return cryptd_aead_enqueue(req, cryptd_aead_encrypt );
+}
+
+static int cryptd_aead_decrypt_enqueue(struct aead_request *req)
+{
+ return cryptd_aead_enqueue(req, cryptd_aead_decrypt );
+}
+
+static int cryptd_aead_init_tfm(struct crypto_aead *tfm)
+{
+ struct aead_instance *inst = aead_alg_instance(tfm);
+ struct aead_instance_ctx *ictx = aead_instance_ctx(inst);
+ struct crypto_aead_spawn *spawn = &ictx->aead_spawn;
+ struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
+ struct crypto_aead *cipher;
+
+ cipher = crypto_spawn_aead(spawn);
+ if (IS_ERR(cipher))
+ return PTR_ERR(cipher);
+
+ ctx->child = cipher;
+ crypto_aead_set_reqsize(
+ tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx),
+ crypto_aead_reqsize(cipher)));
+ return 0;
+}
+
+static void cryptd_aead_exit_tfm(struct crypto_aead *tfm)
+{
+ struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
+ crypto_free_aead(ctx->child);
+}
+
+static void cryptd_aead_free(struct aead_instance *inst)
+{
+ struct aead_instance_ctx *ctx = aead_instance_ctx(inst);
+
+ crypto_drop_aead(&ctx->aead_spawn);
+ kfree(inst);
+}
+
+static int cryptd_create_aead(struct crypto_template *tmpl,
+ struct rtattr **tb,
+ struct crypto_attr_type *algt,
+ struct cryptd_queue *queue)
+{
+ struct aead_instance_ctx *ctx;
+ struct aead_instance *inst;
+ struct aead_alg *alg;
+ u32 type;
+ u32 mask;
+ int err;
+
+ cryptd_type_and_mask(algt, &type, &mask);
+
+ inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
+ if (!inst)
+ return -ENOMEM;
+
+ ctx = aead_instance_ctx(inst);
+ ctx->queue = queue;
+
+ err = crypto_grab_aead(&ctx->aead_spawn, aead_crypto_instance(inst),
+ crypto_attr_alg_name(tb[1]), type, mask);
+ if (err)
+ goto err_free_inst;
+
+ alg = crypto_spawn_aead_alg(&ctx->aead_spawn);
+ err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base);
+ if (err)
+ goto err_free_inst;
+
+ inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC |
+ (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
+ inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx);
+
+ inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
+ inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
+
+ inst->alg.init = cryptd_aead_init_tfm;
+ inst->alg.exit = cryptd_aead_exit_tfm;
+ inst->alg.setkey = cryptd_aead_setkey;
+ inst->alg.setauthsize = cryptd_aead_setauthsize;
+ inst->alg.encrypt = cryptd_aead_encrypt_enqueue;
+ inst->alg.decrypt = cryptd_aead_decrypt_enqueue;
+
+ inst->free = cryptd_aead_free;
+
+ err = aead_register_instance(tmpl, inst);
+ if (err) {
+err_free_inst:
+ cryptd_aead_free(inst);
+ }
+ return err;
+}
+
+static struct cryptd_queue queue;
+
+static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
+{
+ struct crypto_attr_type *algt;
+
+ algt = crypto_get_attr_type(tb);
+ if (IS_ERR(algt))
+ return PTR_ERR(algt);
+
+ switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
+ case CRYPTO_ALG_TYPE_SKCIPHER:
+ return cryptd_create_skcipher(tmpl, tb, algt, &queue);
+ case CRYPTO_ALG_TYPE_HASH:
+ return cryptd_create_hash(tmpl, tb, algt, &queue);
+ case CRYPTO_ALG_TYPE_AEAD:
+ return cryptd_create_aead(tmpl, tb, algt, &queue);
+ }
+
+ return -EINVAL;
+}
+
+static struct crypto_template cryptd_tmpl = {
+ .name = "cryptd",
+ .create = cryptd_create,
+ .module = THIS_MODULE,
+};
+
+struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name,
+ u32 type, u32 mask)
+{
+ char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
+ struct cryptd_skcipher_ctx *ctx;
+ struct crypto_skcipher *tfm;
+
+ if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
+ "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
+ return ERR_PTR(-EINVAL);
+
+ tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask);
+ if (IS_ERR(tfm))
+ return ERR_CAST(tfm);
+
+ if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
+ crypto_free_skcipher(tfm);
+ return ERR_PTR(-EINVAL);
+ }
+
+ ctx = crypto_skcipher_ctx(tfm);
+ refcount_set(&ctx->refcnt, 1);
+
+ return container_of(tfm, struct cryptd_skcipher, base);
+}
+EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher);
+
+struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm)
+{
+ struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
+
+ return ctx->child;
+}
+EXPORT_SYMBOL_GPL(cryptd_skcipher_child);
+
+bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm)
+{
+ struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
+
+ return refcount_read(&ctx->refcnt) - 1;
+}
+EXPORT_SYMBOL_GPL(cryptd_skcipher_queued);
+
+void cryptd_free_skcipher(struct cryptd_skcipher *tfm)
+{
+ struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
+
+ if (refcount_dec_and_test(&ctx->refcnt))
+ crypto_free_skcipher(&tfm->base);
+}
+EXPORT_SYMBOL_GPL(cryptd_free_skcipher);
+
+struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
+ u32 type, u32 mask)
+{
+ char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
+ struct cryptd_hash_ctx *ctx;
+ struct crypto_ahash *tfm;
+
+ if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
+ "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
+ return ERR_PTR(-EINVAL);
+ tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask);
+ if (IS_ERR(tfm))
+ return ERR_CAST(tfm);
+ if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
+ crypto_free_ahash(tfm);
+ return ERR_PTR(-EINVAL);
+ }
+
+ ctx = crypto_ahash_ctx(tfm);
+ refcount_set(&ctx->refcnt, 1);
+
+ return __cryptd_ahash_cast(tfm);
+}
+EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
+
+struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm)
+{
+ struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
+
+ return ctx->child;
+}
+EXPORT_SYMBOL_GPL(cryptd_ahash_child);
+
+struct shash_desc *cryptd_shash_desc(struct ahash_request *req)
+{
+ struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
+ return &rctx->desc;
+}
+EXPORT_SYMBOL_GPL(cryptd_shash_desc);
+
+bool cryptd_ahash_queued(struct cryptd_ahash *tfm)
+{
+ struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
+
+ return refcount_read(&ctx->refcnt) - 1;
+}
+EXPORT_SYMBOL_GPL(cryptd_ahash_queued);
+
+void cryptd_free_ahash(struct cryptd_ahash *tfm)
+{
+ struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
+
+ if (refcount_dec_and_test(&ctx->refcnt))
+ crypto_free_ahash(&tfm->base);
+}
+EXPORT_SYMBOL_GPL(cryptd_free_ahash);
+
+struct cryptd_aead *cryptd_alloc_aead(const char *alg_name,
+ u32 type, u32 mask)
+{
+ char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
+ struct cryptd_aead_ctx *ctx;
+ struct crypto_aead *tfm;
+
+ if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
+ "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
+ return ERR_PTR(-EINVAL);
+ tfm = crypto_alloc_aead(cryptd_alg_name, type, mask);
+ if (IS_ERR(tfm))
+ return ERR_CAST(tfm);
+ if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
+ crypto_free_aead(tfm);
+ return ERR_PTR(-EINVAL);
+ }
+
+ ctx = crypto_aead_ctx(tfm);
+ refcount_set(&ctx->refcnt, 1);
+
+ return __cryptd_aead_cast(tfm);
+}
+EXPORT_SYMBOL_GPL(cryptd_alloc_aead);
+
+struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm)
+{
+ struct cryptd_aead_ctx *ctx;
+ ctx = crypto_aead_ctx(&tfm->base);
+ return ctx->child;
+}
+EXPORT_SYMBOL_GPL(cryptd_aead_child);
+
+bool cryptd_aead_queued(struct cryptd_aead *tfm)
+{
+ struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
+
+ return refcount_read(&ctx->refcnt) - 1;
+}
+EXPORT_SYMBOL_GPL(cryptd_aead_queued);
+
+void cryptd_free_aead(struct cryptd_aead *tfm)
+{
+ struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
+
+ if (refcount_dec_and_test(&ctx->refcnt))
+ crypto_free_aead(&tfm->base);
+}
+EXPORT_SYMBOL_GPL(cryptd_free_aead);
+
+static int __init cryptd_init(void)
+{
+ int err;
+
+ cryptd_wq = alloc_workqueue("cryptd", WQ_MEM_RECLAIM | WQ_CPU_INTENSIVE,
+ 1);
+ if (!cryptd_wq)
+ return -ENOMEM;
+
+ err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen);
+ if (err)
+ goto err_destroy_wq;
+
+ err = crypto_register_template(&cryptd_tmpl);
+ if (err)
+ goto err_fini_queue;
+
+ return 0;
+
+err_fini_queue:
+ cryptd_fini_queue(&queue);
+err_destroy_wq:
+ destroy_workqueue(cryptd_wq);
+ return err;
+}
+
+static void __exit cryptd_exit(void)
+{
+ destroy_workqueue(cryptd_wq);
+ cryptd_fini_queue(&queue);
+ crypto_unregister_template(&cryptd_tmpl);
+}
+
+subsys_initcall(cryptd_init);
+module_exit(cryptd_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Software async crypto daemon");
+MODULE_ALIAS_CRYPTO("cryptd");