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crypto/cryptd.c
28.6 KB
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// SPDX-License-Identifier: GPL-2.0-or-later |
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/* * Software async crypto daemon. * * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> * |
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* 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. |
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*/ |
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#include <crypto/internal/hash.h> |
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#include <crypto/internal/aead.h> |
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#include <crypto/internal/skcipher.h> |
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#include <crypto/cryptd.h> |
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#include <linux/refcount.h> |
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#include <linux/err.h> #include <linux/init.h> #include <linux/kernel.h> |
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#include <linux/list.h> #include <linux/module.h> |
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#include <linux/scatterlist.h> #include <linux/sched.h> #include <linux/slab.h> |
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#include <linux/workqueue.h> |
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static unsigned int cryptd_max_cpu_qlen = 1000; |
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module_param(cryptd_max_cpu_qlen, uint, 0); MODULE_PARM_DESC(cryptd_max_cpu_qlen, "Set cryptd Max queue depth"); |
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static struct workqueue_struct *cryptd_wq; |
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struct cryptd_cpu_queue { |
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struct crypto_queue queue; |
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struct work_struct work; }; struct cryptd_queue { |
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struct cryptd_cpu_queue __percpu *cpu_queue; |
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}; struct cryptd_instance_ctx { struct crypto_spawn spawn; |
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struct cryptd_queue *queue; |
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}; |
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struct skcipherd_instance_ctx { struct crypto_skcipher_spawn spawn; struct cryptd_queue *queue; }; |
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struct hashd_instance_ctx { struct crypto_shash_spawn spawn; struct cryptd_queue *queue; }; |
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struct aead_instance_ctx { struct crypto_aead_spawn aead_spawn; struct cryptd_queue *queue; }; |
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struct cryptd_skcipher_ctx { |
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refcount_t refcnt; |
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struct crypto_sync_skcipher *child; |
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}; struct cryptd_skcipher_request_ctx { crypto_completion_t complete; }; |
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struct cryptd_hash_ctx { |
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refcount_t refcnt; |
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struct crypto_shash *child; |
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}; struct cryptd_hash_request_ctx { crypto_completion_t complete; |
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struct shash_desc desc; |
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}; |
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struct cryptd_aead_ctx { |
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refcount_t refcnt; |
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struct crypto_aead *child; }; struct cryptd_aead_request_ctx { crypto_completion_t complete; }; |
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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); } |
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pr_info("cryptd: max_cpu_qlen set to %d ", max_cpu_qlen); |
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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 cpu, err; struct cryptd_cpu_queue *cpu_queue; |
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refcount_t *refcnt; |
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cpu = get_cpu(); |
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cpu_queue = this_cpu_ptr(queue->cpu_queue); |
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err = crypto_enqueue_request(&cpu_queue->queue, request); |
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refcnt = crypto_tfm_ctx(request->tfm); |
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if (err == -ENOSPC) |
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goto out_put_cpu; |
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queue_work_on(cpu, cryptd_wq, &cpu_queue->work); |
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if (!refcount_read(refcnt)) |
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goto out_put_cpu; |
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refcount_inc(refcnt); |
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out_put_cpu: |
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put_cpu(); 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); |
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/* * Only handle one request at a time to avoid hogging crypto workqueue. * preempt_disable/enable is used to prevent being preempted by * cryptd_enqueue_request(). local_bh_disable/enable is used to prevent * cryptd_enqueue_request() being accessed from software interrupts. */ local_bh_disable(); |
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preempt_disable(); backlog = crypto_get_backlog(&cpu_queue->queue); req = crypto_dequeue_request(&cpu_queue->queue); preempt_enable(); |
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local_bh_enable(); |
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if (!req) return; if (backlog) backlog->complete(backlog, -EINPROGRESS); req->complete(req, 0); if (cpu_queue->queue.qlen) |
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queue_work(cryptd_wq, &cpu_queue->work); |
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} static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm) |
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{ struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst); |
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return ictx->queue; |
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} |
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static inline void cryptd_check_internal(struct rtattr **tb, u32 *type, u32 *mask) { struct crypto_attr_type *algt; algt = crypto_get_attr_type(tb); if (IS_ERR(algt)) return; |
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*type |= algt->type & CRYPTO_ALG_INTERNAL; *mask |= algt->mask & CRYPTO_ALG_INTERNAL; |
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} |
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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; } |
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static int cryptd_skcipher_setkey(struct crypto_skcipher *parent, const u8 *key, unsigned int keylen) { struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent); |
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struct crypto_sync_skcipher *child = ctx->child; |
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crypto_sync_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); crypto_sync_skcipher_set_flags(child, crypto_skcipher_get_flags(parent) & |
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CRYPTO_TFM_REQ_MASK); |
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return crypto_sync_skcipher_setkey(child, key, keylen); |
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} 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); |
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int refcnt = refcount_read(&ctx->refcnt); |
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local_bh_disable(); rctx->complete(&req->base, err); local_bh_enable(); |
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if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt)) |
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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); |
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struct crypto_sync_skcipher *child = ctx->child; SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child); |
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if (unlikely(err == -EINPROGRESS)) goto out; |
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skcipher_request_set_sync_tfm(subreq, child); |
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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); |
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struct crypto_sync_skcipher *child = ctx->child; SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child); |
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if (unlikely(err == -EINPROGRESS)) goto out; |
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skcipher_request_set_sync_tfm(subreq, child); |
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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); |
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ctx->child = (struct crypto_sync_skcipher *)cipher; |
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crypto_skcipher_set_reqsize( tfm, sizeof(struct cryptd_skcipher_request_ctx)); return 0; } static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm) { struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
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crypto_free_sync_skcipher(ctx->child); |
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} static void cryptd_skcipher_free(struct skcipher_instance *inst) { struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst); crypto_drop_skcipher(&ctx->spawn); |
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kfree(inst); |
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} static int cryptd_create_skcipher(struct crypto_template *tmpl, struct rtattr **tb, struct cryptd_queue *queue) { struct skcipherd_instance_ctx *ctx; struct skcipher_instance *inst; struct skcipher_alg *alg; const char *name; u32 type; u32 mask; int err; type = 0; mask = CRYPTO_ALG_ASYNC; cryptd_check_internal(tb, &type, &mask); name = crypto_attr_alg_name(tb[1]); if (IS_ERR(name)) return PTR_ERR(name); inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); if (!inst) return -ENOMEM; ctx = skcipher_instance_ctx(inst); ctx->queue = queue; |
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err = crypto_grab_skcipher(&ctx->spawn, skcipher_crypto_instance(inst), name, type, mask); |
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if (err) goto out_free_inst; alg = crypto_spawn_skcipher_alg(&ctx->spawn); err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base); if (err) goto out_drop_skcipher; 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) { out_drop_skcipher: crypto_drop_skcipher(&ctx->spawn); out_free_inst: kfree(inst); } return err; } |
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static int cryptd_hash_init_tfm(struct crypto_tfm *tfm) { struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); |
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struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst); 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_shash *hash; |
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hash = crypto_spawn_shash(spawn); if (IS_ERR(hash)) return PTR_ERR(hash); |
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ctx->child = hash; |
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crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), sizeof(struct cryptd_hash_request_ctx) + crypto_shash_descsize(hash)); |
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return 0; } static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm) { struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm); |
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crypto_free_shash(ctx->child); |
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} static int cryptd_hash_setkey(struct crypto_ahash *parent, const u8 *key, unsigned int keylen) { struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent); |
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struct crypto_shash *child = ctx->child; |
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crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK); crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) & CRYPTO_TFM_REQ_MASK); |
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return crypto_shash_setkey(child, key, keylen); |
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} static int cryptd_hash_enqueue(struct ahash_request *req, |
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crypto_completion_t compl) |
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{ struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); |
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struct cryptd_queue *queue = cryptd_get_queue(crypto_ahash_tfm(tfm)); |
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rctx->complete = req->base.complete; |
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req->base.complete = compl; |
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return cryptd_enqueue_request(queue, &req->base); |
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} |
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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); |
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int refcnt = refcount_read(&ctx->refcnt); |
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local_bh_disable(); rctx->complete(&req->base, err); local_bh_enable(); |
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if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt)) |
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crypto_free_ahash(tfm); } |
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static void cryptd_hash_init(struct crypto_async_request *req_async, int err) { |
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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; |
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if (unlikely(err == -EINPROGRESS)) goto out; |
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desc->tfm = child; |
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err = crypto_shash_init(desc); |
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req->base.complete = rctx->complete; out: |
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cryptd_hash_complete(req, err); |
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} 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) { |
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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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rctx = ahash_request_ctx(req); if (unlikely(err == -EINPROGRESS)) goto out; |
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err = shash_ahash_update(req, &rctx->desc); |
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req->base.complete = rctx->complete; out: |
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cryptd_hash_complete(req, err); |
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} 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) { |
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struct ahash_request *req = ahash_request_cast(req_async); struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
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if (unlikely(err == -EINPROGRESS)) goto out; |
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err = crypto_shash_final(&rctx->desc, req->result); |
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req->base.complete = rctx->complete; out: |
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cryptd_hash_complete(req, err); |
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} static int cryptd_hash_final_enqueue(struct ahash_request *req) { return cryptd_hash_enqueue(req, cryptd_hash_final); } |
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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: |
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cryptd_hash_complete(req, err); |
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|
557 558 559 560 561 562 |
} static int cryptd_hash_finup_enqueue(struct ahash_request *req) { return cryptd_hash_enqueue(req, cryptd_hash_finup); } |
b8a28251c
|
563 564 |
static void cryptd_hash_digest(struct crypto_async_request *req_async, int err) { |
46309d893
|
565 566 567 568 569 |
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; |
b8a28251c
|
570 571 572 |
if (unlikely(err == -EINPROGRESS)) goto out; |
46309d893
|
573 |
desc->tfm = child; |
b8a28251c
|
574 |
|
46309d893
|
575 |
err = shash_ahash_digest(req, desc); |
b8a28251c
|
576 577 578 579 |
req->base.complete = rctx->complete; out: |
81760ea6a
|
580 |
cryptd_hash_complete(req, err); |
b8a28251c
|
581 582 583 584 585 586 |
} static int cryptd_hash_digest_enqueue(struct ahash_request *req) { return cryptd_hash_enqueue(req, cryptd_hash_digest); } |
6fba00d17
|
587 588 589 590 591 592 593 594 595 |
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) { |
0bd222359
|
596 597 598 599 600 |
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; |
6fba00d17
|
601 |
|
0bd222359
|
602 |
return crypto_shash_import(desc, in); |
6fba00d17
|
603 |
} |
758ec5ac5
|
604 605 606 607 608 609 610 |
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); } |
9cd899a32
|
611 612 |
static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb, struct cryptd_queue *queue) |
b8a28251c
|
613 |
{ |
46309d893
|
614 |
struct hashd_instance_ctx *ctx; |
0b535adfb
|
615 |
struct ahash_instance *inst; |
218c5035f
|
616 |
struct shash_alg *alg; |
466a7b9e3
|
617 618 |
u32 type = 0; u32 mask = 0; |
46309d893
|
619 |
int err; |
b8a28251c
|
620 |
|
466a7b9e3
|
621 |
cryptd_check_internal(tb, &type, &mask); |
218c5035f
|
622 623 624 |
inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); if (!inst) return -ENOMEM; |
b8a28251c
|
625 |
|
0b535adfb
|
626 |
ctx = ahash_instance_ctx(inst); |
46309d893
|
627 |
ctx->queue = queue; |
218c5035f
|
628 629 |
err = crypto_grab_shash(&ctx->spawn, ahash_crypto_instance(inst), crypto_attr_alg_name(tb[1]), type, mask); |
46309d893
|
630 |
if (err) |
218c5035f
|
631 632 633 634 635 636 |
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; |
46309d893
|
637 |
|
a208fa8f3
|
638 |
inst->alg.halg.base.cra_flags = CRYPTO_ALG_ASYNC | |
218c5035f
|
639 640 |
(alg->base.cra_flags & (CRYPTO_ALG_INTERNAL | CRYPTO_ALG_OPTIONAL_KEY)); |
b8a28251c
|
641 |
|
218c5035f
|
642 643 |
inst->alg.halg.digestsize = alg->digestsize; inst->alg.halg.statesize = alg->statesize; |
0b535adfb
|
644 |
inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx); |
b8a28251c
|
645 |
|
0b535adfb
|
646 647 |
inst->alg.halg.base.cra_init = cryptd_hash_init_tfm; inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm; |
b8a28251c
|
648 |
|
0b535adfb
|
649 650 651 |
inst->alg.init = cryptd_hash_init_enqueue; inst->alg.update = cryptd_hash_update_enqueue; inst->alg.final = cryptd_hash_final_enqueue; |
6fba00d17
|
652 653 654 |
inst->alg.finup = cryptd_hash_finup_enqueue; inst->alg.export = cryptd_hash_export; inst->alg.import = cryptd_hash_import; |
218c5035f
|
655 |
if (crypto_shash_alg_has_setkey(alg)) |
841a3ff32
|
656 |
inst->alg.setkey = cryptd_hash_setkey; |
0b535adfb
|
657 |
inst->alg.digest = cryptd_hash_digest_enqueue; |
b8a28251c
|
658 |
|
758ec5ac5
|
659 |
inst->free = cryptd_hash_free; |
0b535adfb
|
660 |
err = ahash_register_instance(tmpl, inst); |
9cd899a32
|
661 |
if (err) { |
218c5035f
|
662 |
err_free_inst: |
9cd899a32
|
663 |
crypto_drop_shash(&ctx->spawn); |
9cd899a32
|
664 665 |
kfree(inst); } |
9cd899a32
|
666 |
return err; |
b8a28251c
|
667 |
} |
92b9876bd
|
668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 |
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); } |
298c926c6
|
685 686 687 688 689 690 |
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; |
81760ea6a
|
691 |
struct cryptd_aead_ctx *ctx; |
ec9f2006f
|
692 |
crypto_completion_t compl; |
81760ea6a
|
693 694 |
struct crypto_aead *tfm; int refcnt; |
ec9f2006f
|
695 |
|
298c926c6
|
696 |
rctx = aead_request_ctx(req); |
ec9f2006f
|
697 |
compl = rctx->complete; |
298c926c6
|
698 |
|
31bd44e76
|
699 |
tfm = crypto_aead_reqtfm(req); |
298c926c6
|
700 701 702 703 |
if (unlikely(err == -EINPROGRESS)) goto out; aead_request_set_tfm(req, child); err = crypt( req ); |
81760ea6a
|
704 |
|
298c926c6
|
705 |
out: |
81760ea6a
|
706 |
ctx = crypto_aead_ctx(tfm); |
43b970fa8
|
707 |
refcnt = refcount_read(&ctx->refcnt); |
81760ea6a
|
708 |
|
298c926c6
|
709 |
local_bh_disable(); |
ec9f2006f
|
710 |
compl(&req->base, err); |
298c926c6
|
711 |
local_bh_enable(); |
81760ea6a
|
712 |
|
43b970fa8
|
713 |
if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt)) |
81760ea6a
|
714 |
crypto_free_aead(tfm); |
298c926c6
|
715 716 717 718 719 720 721 722 723 |
} 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); |
ba3749a71
|
724 |
cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt); |
298c926c6
|
725 726 727 728 729 730 731 732 733 |
} 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); |
ba3749a71
|
734 |
cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt); |
298c926c6
|
735 736 737 |
} static int cryptd_aead_enqueue(struct aead_request *req, |
3e3dc25fe
|
738 |
crypto_completion_t compl) |
298c926c6
|
739 740 741 742 743 744 |
{ 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; |
3e3dc25fe
|
745 |
req->base.complete = compl; |
298c926c6
|
746 747 748 749 750 751 752 753 754 755 756 757 |
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 ); } |
f614e546f
|
758 |
static int cryptd_aead_init_tfm(struct crypto_aead *tfm) |
298c926c6
|
759 |
{ |
f614e546f
|
760 761 |
struct aead_instance *inst = aead_alg_instance(tfm); struct aead_instance_ctx *ictx = aead_instance_ctx(inst); |
298c926c6
|
762 |
struct crypto_aead_spawn *spawn = &ictx->aead_spawn; |
f614e546f
|
763 |
struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm); |
298c926c6
|
764 765 766 767 768 |
struct crypto_aead *cipher; cipher = crypto_spawn_aead(spawn); if (IS_ERR(cipher)) return PTR_ERR(cipher); |
298c926c6
|
769 |
ctx->child = cipher; |
ec9f2006f
|
770 771 772 |
crypto_aead_set_reqsize( tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx), crypto_aead_reqsize(cipher))); |
298c926c6
|
773 774 |
return 0; } |
f614e546f
|
775 |
static void cryptd_aead_exit_tfm(struct crypto_aead *tfm) |
298c926c6
|
776 |
{ |
f614e546f
|
777 |
struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm); |
298c926c6
|
778 779 |
crypto_free_aead(ctx->child); } |
758ec5ac5
|
780 781 782 783 784 785 786 |
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); } |
298c926c6
|
787 788 789 790 791 |
static int cryptd_create_aead(struct crypto_template *tmpl, struct rtattr **tb, struct cryptd_queue *queue) { struct aead_instance_ctx *ctx; |
f614e546f
|
792 793 |
struct aead_instance *inst; struct aead_alg *alg; |
9b8c456e0
|
794 795 |
const char *name; u32 type = 0; |
ec9f2006f
|
796 |
u32 mask = CRYPTO_ALG_ASYNC; |
298c926c6
|
797 |
int err; |
466a7b9e3
|
798 |
cryptd_check_internal(tb, &type, &mask); |
9b8c456e0
|
799 800 801 |
name = crypto_attr_alg_name(tb[1]); if (IS_ERR(name)) return PTR_ERR(name); |
298c926c6
|
802 |
|
9b8c456e0
|
803 804 805 |
inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); if (!inst) return -ENOMEM; |
298c926c6
|
806 |
|
f614e546f
|
807 |
ctx = aead_instance_ctx(inst); |
298c926c6
|
808 |
ctx->queue = queue; |
cd900f0ca
|
809 810 |
err = crypto_grab_aead(&ctx->aead_spawn, aead_crypto_instance(inst), name, type, mask); |
298c926c6
|
811 812 |
if (err) goto out_free_inst; |
f614e546f
|
813 814 |
alg = crypto_spawn_aead_alg(&ctx->aead_spawn); err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base); |
9b8c456e0
|
815 816 |
if (err) goto out_drop_aead; |
f614e546f
|
817 |
inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC | |
5e4b8c1fc
|
818 |
(alg->base.cra_flags & CRYPTO_ALG_INTERNAL); |
f614e546f
|
819 |
inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx); |
298c926c6
|
820 |
|
f614e546f
|
821 822 823 824 825 826 827 828 829 |
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; |
758ec5ac5
|
830 |
inst->free = cryptd_aead_free; |
f614e546f
|
831 |
err = aead_register_instance(tmpl, inst); |
298c926c6
|
832 |
if (err) { |
9b8c456e0
|
833 834 |
out_drop_aead: crypto_drop_aead(&ctx->aead_spawn); |
298c926c6
|
835 836 837 |
out_free_inst: kfree(inst); } |
298c926c6
|
838 839 |
return err; } |
254eff771
|
840 |
static struct cryptd_queue queue; |
124b53d02
|
841 |
|
9cd899a32
|
842 |
static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb) |
124b53d02
|
843 844 845 846 847 |
{ struct crypto_attr_type *algt; algt = crypto_get_attr_type(tb); if (IS_ERR(algt)) |
9cd899a32
|
848 |
return PTR_ERR(algt); |
124b53d02
|
849 850 |
switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) { |
c65058b75
|
851 |
case CRYPTO_ALG_TYPE_SKCIPHER: |
4e0958d19
|
852 |
return cryptd_create_skcipher(tmpl, tb, &queue); |
84ede58df
|
853 |
case CRYPTO_ALG_TYPE_HASH: |
9cd899a32
|
854 |
return cryptd_create_hash(tmpl, tb, &queue); |
298c926c6
|
855 856 |
case CRYPTO_ALG_TYPE_AEAD: return cryptd_create_aead(tmpl, tb, &queue); |
124b53d02
|
857 |
} |
9cd899a32
|
858 |
return -EINVAL; |
124b53d02
|
859 |
} |
124b53d02
|
860 861 |
static struct crypto_template cryptd_tmpl = { .name = "cryptd", |
9cd899a32
|
862 |
.create = cryptd_create, |
124b53d02
|
863 864 |
.module = THIS_MODULE, }; |
4e0958d19
|
865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 |
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); |
43b970fa8
|
886 |
refcount_set(&ctx->refcnt, 1); |
4e0958d19
|
887 888 889 890 891 892 893 894 |
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); |
36b3875a9
|
895 |
return &ctx->child->base; |
4e0958d19
|
896 897 898 899 900 901 |
} EXPORT_SYMBOL_GPL(cryptd_skcipher_child); bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm) { struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); |
43b970fa8
|
902 |
return refcount_read(&ctx->refcnt) - 1; |
4e0958d19
|
903 904 905 906 907 908 |
} EXPORT_SYMBOL_GPL(cryptd_skcipher_queued); void cryptd_free_skcipher(struct cryptd_skcipher *tfm) { struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); |
43b970fa8
|
909 |
if (refcount_dec_and_test(&ctx->refcnt)) |
4e0958d19
|
910 911 912 |
crypto_free_skcipher(&tfm->base); } EXPORT_SYMBOL_GPL(cryptd_free_skcipher); |
ace136636
|
913 914 915 916 |
struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name, u32 type, u32 mask) { char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; |
81760ea6a
|
917 |
struct cryptd_hash_ctx *ctx; |
ace136636
|
918 919 920 921 922 923 924 925 926 927 928 929 |
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); } |
81760ea6a
|
930 |
ctx = crypto_ahash_ctx(tfm); |
43b970fa8
|
931 |
refcount_set(&ctx->refcnt, 1); |
81760ea6a
|
932 |
|
ace136636
|
933 934 935 936 937 938 939 940 941 942 943 |
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); |
0e1227d35
|
944 945 946 947 948 949 |
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); |
81760ea6a
|
950 951 952 |
bool cryptd_ahash_queued(struct cryptd_ahash *tfm) { struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); |
43b970fa8
|
953 |
return refcount_read(&ctx->refcnt) - 1; |
81760ea6a
|
954 955 |
} EXPORT_SYMBOL_GPL(cryptd_ahash_queued); |
ace136636
|
956 957 |
void cryptd_free_ahash(struct cryptd_ahash *tfm) { |
81760ea6a
|
958 |
struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); |
43b970fa8
|
959 |
if (refcount_dec_and_test(&ctx->refcnt)) |
81760ea6a
|
960 |
crypto_free_ahash(&tfm->base); |
ace136636
|
961 962 |
} EXPORT_SYMBOL_GPL(cryptd_free_ahash); |
298c926c6
|
963 964 965 966 |
struct cryptd_aead *cryptd_alloc_aead(const char *alg_name, u32 type, u32 mask) { char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; |
81760ea6a
|
967 |
struct cryptd_aead_ctx *ctx; |
298c926c6
|
968 969 970 971 972 973 974 975 976 977 978 979 |
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); } |
81760ea6a
|
980 981 |
ctx = crypto_aead_ctx(tfm); |
43b970fa8
|
982 |
refcount_set(&ctx->refcnt, 1); |
81760ea6a
|
983 |
|
298c926c6
|
984 985 986 987 988 989 990 991 992 993 994 |
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); |
81760ea6a
|
995 996 997 |
bool cryptd_aead_queued(struct cryptd_aead *tfm) { struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base); |
43b970fa8
|
998 |
return refcount_read(&ctx->refcnt) - 1; |
81760ea6a
|
999 1000 |
} EXPORT_SYMBOL_GPL(cryptd_aead_queued); |
298c926c6
|
1001 1002 |
void cryptd_free_aead(struct cryptd_aead *tfm) { |
81760ea6a
|
1003 |
struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base); |
43b970fa8
|
1004 |
if (refcount_dec_and_test(&ctx->refcnt)) |
81760ea6a
|
1005 |
crypto_free_aead(&tfm->base); |
298c926c6
|
1006 1007 |
} EXPORT_SYMBOL_GPL(cryptd_free_aead); |
124b53d02
|
1008 1009 1010 |
static int __init cryptd_init(void) { int err; |
3e56e1686
|
1011 1012 1013 1014 |
cryptd_wq = alloc_workqueue("cryptd", WQ_MEM_RECLAIM | WQ_CPU_INTENSIVE, 1); if (!cryptd_wq) return -ENOMEM; |
c3a536056
|
1015 |
err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen); |
124b53d02
|
1016 |
if (err) |
3e56e1686
|
1017 |
goto err_destroy_wq; |
124b53d02
|
1018 1019 1020 |
err = crypto_register_template(&cryptd_tmpl); if (err) |
3e56e1686
|
1021 |
goto err_fini_queue; |
124b53d02
|
1022 |
|
3e56e1686
|
1023 1024 1025 1026 1027 1028 |
return 0; err_fini_queue: cryptd_fini_queue(&queue); err_destroy_wq: destroy_workqueue(cryptd_wq); |
124b53d02
|
1029 1030 1031 1032 1033 |
return err; } static void __exit cryptd_exit(void) { |
3e56e1686
|
1034 |
destroy_workqueue(cryptd_wq); |
254eff771
|
1035 |
cryptd_fini_queue(&queue); |
124b53d02
|
1036 1037 |
crypto_unregister_template(&cryptd_tmpl); } |
b2bac6acf
|
1038 |
subsys_initcall(cryptd_init); |
124b53d02
|
1039 1040 1041 1042 |
module_exit(cryptd_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Software async crypto daemon"); |
4943ba16b
|
1043 |
MODULE_ALIAS_CRYPTO("cryptd"); |