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crypto/cryptd.c
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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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* This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. * */ #include <crypto/algapi.h> |
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#include <crypto/internal/hash.h> |
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#include <crypto/internal/aead.h> |
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#include <crypto/cryptd.h> |
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#include <crypto/crypto_wq.h> |
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#include <linux/atomic.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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#define CRYPTD_MAX_CPU_QLEN 1000 |
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|
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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 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_blkcipher_ctx { |
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atomic_t refcnt; |
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struct crypto_blkcipher *child; }; struct cryptd_blkcipher_request_ctx { crypto_completion_t complete; }; |
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struct cryptd_hash_ctx { |
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atomic_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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atomic_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); } 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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struct crypto_tfm *tfm; atomic_t *refcnt; bool may_backlog; |
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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); may_backlog = request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG; if (err == -EBUSY && !may_backlog) goto out_put_cpu; |
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queue_work_on(cpu, kcrypto_wq, &cpu_queue->work); |
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if (!atomic_read(refcnt)) goto out_put_cpu; tfm = request->tfm; atomic_inc(refcnt); 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) queue_work(kcrypto_wq, &cpu_queue->work); } 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_blkcipher_setkey(struct crypto_ablkcipher *parent, const u8 *key, unsigned int keylen) { struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(parent); struct crypto_blkcipher *child = ctx->child; int err; crypto_blkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); crypto_blkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) & CRYPTO_TFM_REQ_MASK); err = crypto_blkcipher_setkey(child, key, keylen); crypto_ablkcipher_set_flags(parent, crypto_blkcipher_get_flags(child) & CRYPTO_TFM_RES_MASK); return err; } static void cryptd_blkcipher_crypt(struct ablkcipher_request *req, struct crypto_blkcipher *child, int err, int (*crypt)(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int len)) { struct cryptd_blkcipher_request_ctx *rctx; |
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struct cryptd_blkcipher_ctx *ctx; struct crypto_ablkcipher *tfm; |
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struct blkcipher_desc desc; |
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int refcnt; |
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rctx = ablkcipher_request_ctx(req); |
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if (unlikely(err == -EINPROGRESS)) goto out; |
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desc.tfm = child; desc.info = req->info; desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP; err = crypt(&desc, req->dst, req->src, req->nbytes); req->base.complete = rctx->complete; |
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out: |
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tfm = crypto_ablkcipher_reqtfm(req); ctx = crypto_ablkcipher_ctx(tfm); refcnt = atomic_read(&ctx->refcnt); |
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local_bh_disable(); |
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rctx->complete(&req->base, err); |
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local_bh_enable(); |
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if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt)) crypto_free_ablkcipher(tfm); |
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} static void cryptd_blkcipher_encrypt(struct crypto_async_request *req, int err) { struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm); struct crypto_blkcipher *child = ctx->child; cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err, crypto_blkcipher_crt(child)->encrypt); } static void cryptd_blkcipher_decrypt(struct crypto_async_request *req, int err) { struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm); struct crypto_blkcipher *child = ctx->child; cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err, crypto_blkcipher_crt(child)->decrypt); } static int cryptd_blkcipher_enqueue(struct ablkcipher_request *req, |
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crypto_completion_t compl) |
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{ struct cryptd_blkcipher_request_ctx *rctx = ablkcipher_request_ctx(req); struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); |
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struct cryptd_queue *queue; |
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queue = cryptd_get_queue(crypto_ablkcipher_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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} static int cryptd_blkcipher_encrypt_enqueue(struct ablkcipher_request *req) { return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_encrypt); } static int cryptd_blkcipher_decrypt_enqueue(struct ablkcipher_request *req) { return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_decrypt); } static int cryptd_blkcipher_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_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm); struct crypto_blkcipher *cipher; cipher = crypto_spawn_blkcipher(spawn); if (IS_ERR(cipher)) return PTR_ERR(cipher); ctx->child = cipher; tfm->crt_ablkcipher.reqsize = sizeof(struct cryptd_blkcipher_request_ctx); return 0; } static void cryptd_blkcipher_exit_tfm(struct crypto_tfm *tfm) { struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm); |
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crypto_free_blkcipher(ctx->child); } |
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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 void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head, unsigned int tail) |
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{ |
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char *p; |
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struct crypto_instance *inst; |
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int err; |
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p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL); if (!p) return ERR_PTR(-ENOMEM); inst = (void *)(p + head); |
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err = cryptd_init_instance(inst, alg); if (err) |
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goto out_free_inst; |
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out: |
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return p; |
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out_free_inst: |
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kfree(p); p = ERR_PTR(err); |
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goto out; } |
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static int cryptd_create_blkcipher(struct crypto_template *tmpl, 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; struct crypto_alg *alg; |
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u32 type = CRYPTO_ALG_TYPE_BLKCIPHER; u32 mask = CRYPTO_ALG_TYPE_MASK; |
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int err; |
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|
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cryptd_check_internal(tb, &type, &mask); alg = crypto_get_attr_alg(tb, type, mask); |
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if (IS_ERR(alg)) |
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return PTR_ERR(alg); |
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inst = cryptd_alloc_instance(alg, 0, sizeof(*ctx)); |
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err = PTR_ERR(inst); |
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if (IS_ERR(inst)) goto out_put_alg; |
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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; |
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type = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC; if (alg->cra_flags & CRYPTO_ALG_INTERNAL) type |= CRYPTO_ALG_INTERNAL; inst->alg.cra_flags = type; |
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inst->alg.cra_type = &crypto_ablkcipher_type; inst->alg.cra_ablkcipher.ivsize = alg->cra_blkcipher.ivsize; inst->alg.cra_ablkcipher.min_keysize = alg->cra_blkcipher.min_keysize; inst->alg.cra_ablkcipher.max_keysize = alg->cra_blkcipher.max_keysize; |
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inst->alg.cra_ablkcipher.geniv = alg->cra_blkcipher.geniv; |
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inst->alg.cra_ctxsize = sizeof(struct cryptd_blkcipher_ctx); inst->alg.cra_init = cryptd_blkcipher_init_tfm; inst->alg.cra_exit = cryptd_blkcipher_exit_tfm; inst->alg.cra_ablkcipher.setkey = cryptd_blkcipher_setkey; inst->alg.cra_ablkcipher.encrypt = cryptd_blkcipher_encrypt_enqueue; inst->alg.cra_ablkcipher.decrypt = cryptd_blkcipher_decrypt_enqueue; |
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err = crypto_register_instance(tmpl, inst); if (err) { crypto_drop_spawn(&ctx->spawn); out_free_inst: kfree(inst); } |
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out_put_alg: crypto_mod_put(alg); |
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return err; |
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} |
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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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int err; |
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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); err = crypto_shash_setkey(child, key, keylen); crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) & CRYPTO_TFM_RES_MASK); |
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return err; } 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); int refcnt = atomic_read(&ctx->refcnt); local_bh_disable(); rctx->complete(&req->base, err); local_bh_enable(); if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt)) 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; desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP; |
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err = crypto_shash_init(desc); |
b8a28251c [CRYPTO] cryptd: ... |
494 495 496 497 |
req->base.complete = rctx->complete; out: |
81760ea6a crypto: cryptd - ... |
498 |
cryptd_hash_complete(req, err); |
b8a28251c [CRYPTO] cryptd: ... |
499 500 501 502 503 504 505 506 507 |
} 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) { |
46309d893 crypto: cryptd - ... |
508 |
struct ahash_request *req = ahash_request_cast(req_async); |
b8a28251c [CRYPTO] cryptd: ... |
509 |
struct cryptd_hash_request_ctx *rctx; |
b8a28251c [CRYPTO] cryptd: ... |
510 511 512 513 514 |
rctx = ahash_request_ctx(req); if (unlikely(err == -EINPROGRESS)) goto out; |
46309d893 crypto: cryptd - ... |
515 |
err = shash_ahash_update(req, &rctx->desc); |
b8a28251c [CRYPTO] cryptd: ... |
516 517 518 519 |
req->base.complete = rctx->complete; out: |
81760ea6a crypto: cryptd - ... |
520 |
cryptd_hash_complete(req, err); |
b8a28251c [CRYPTO] cryptd: ... |
521 522 523 524 525 526 527 528 529 |
} 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) { |
46309d893 crypto: cryptd - ... |
530 531 |
struct ahash_request *req = ahash_request_cast(req_async); struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
b8a28251c [CRYPTO] cryptd: ... |
532 533 534 |
if (unlikely(err == -EINPROGRESS)) goto out; |
46309d893 crypto: cryptd - ... |
535 |
err = crypto_shash_final(&rctx->desc, req->result); |
b8a28251c [CRYPTO] cryptd: ... |
536 537 538 539 |
req->base.complete = rctx->complete; out: |
81760ea6a crypto: cryptd - ... |
540 |
cryptd_hash_complete(req, err); |
b8a28251c [CRYPTO] cryptd: ... |
541 542 543 544 545 546 |
} static int cryptd_hash_final_enqueue(struct ahash_request *req) { return cryptd_hash_enqueue(req, cryptd_hash_final); } |
6fba00d17 crypto: cryptd - ... |
547 548 549 550 551 552 553 554 555 556 557 558 559 |
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: |
81760ea6a crypto: cryptd - ... |
560 |
cryptd_hash_complete(req, err); |
6fba00d17 crypto: cryptd - ... |
561 562 563 564 565 566 |
} static int cryptd_hash_finup_enqueue(struct ahash_request *req) { return cryptd_hash_enqueue(req, cryptd_hash_finup); } |
b8a28251c [CRYPTO] cryptd: ... |
567 568 |
static void cryptd_hash_digest(struct crypto_async_request *req_async, int err) { |
46309d893 crypto: cryptd - ... |
569 570 571 572 573 |
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 [CRYPTO] cryptd: ... |
574 575 576 |
if (unlikely(err == -EINPROGRESS)) goto out; |
46309d893 crypto: cryptd - ... |
577 578 |
desc->tfm = child; desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP; |
b8a28251c [CRYPTO] cryptd: ... |
579 |
|
46309d893 crypto: cryptd - ... |
580 |
err = shash_ahash_digest(req, desc); |
b8a28251c [CRYPTO] cryptd: ... |
581 582 583 584 |
req->base.complete = rctx->complete; out: |
81760ea6a crypto: cryptd - ... |
585 |
cryptd_hash_complete(req, err); |
b8a28251c [CRYPTO] cryptd: ... |
586 587 588 589 590 591 |
} static int cryptd_hash_digest_enqueue(struct ahash_request *req) { return cryptd_hash_enqueue(req, cryptd_hash_digest); } |
6fba00d17 crypto: cryptd - ... |
592 593 594 595 596 597 598 599 600 |
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 crypto: cryptd - ... |
601 602 603 604 605 606 |
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; desc->flags = req->base.flags; |
6fba00d17 crypto: cryptd - ... |
607 |
|
0bd222359 crypto: cryptd - ... |
608 |
return crypto_shash_import(desc, in); |
6fba00d17 crypto: cryptd - ... |
609 |
} |
9cd899a32 crypto: cryptd - ... |
610 611 |
static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb, struct cryptd_queue *queue) |
b8a28251c [CRYPTO] cryptd: ... |
612 |
{ |
46309d893 crypto: cryptd - ... |
613 |
struct hashd_instance_ctx *ctx; |
0b535adfb crypto: cryptd - ... |
614 |
struct ahash_instance *inst; |
46309d893 crypto: cryptd - ... |
615 |
struct shash_alg *salg; |
b8a28251c [CRYPTO] cryptd: ... |
616 |
struct crypto_alg *alg; |
466a7b9e3 crypto: cryptd - ... |
617 618 |
u32 type = 0; u32 mask = 0; |
46309d893 crypto: cryptd - ... |
619 |
int err; |
b8a28251c [CRYPTO] cryptd: ... |
620 |
|
466a7b9e3 crypto: cryptd - ... |
621 622 623 |
cryptd_check_internal(tb, &type, &mask); salg = shash_attr_alg(tb[1], type, mask); |
46309d893 crypto: cryptd - ... |
624 |
if (IS_ERR(salg)) |
9cd899a32 crypto: cryptd - ... |
625 |
return PTR_ERR(salg); |
b8a28251c [CRYPTO] cryptd: ... |
626 |
|
46309d893 crypto: cryptd - ... |
627 |
alg = &salg->base; |
0b535adfb crypto: cryptd - ... |
628 629 |
inst = cryptd_alloc_instance(alg, ahash_instance_headroom(), sizeof(*ctx)); |
05ed8758f crypto: cryptd - ... |
630 |
err = PTR_ERR(inst); |
b8a28251c [CRYPTO] cryptd: ... |
631 632 |
if (IS_ERR(inst)) goto out_put_alg; |
0b535adfb crypto: cryptd - ... |
633 |
ctx = ahash_instance_ctx(inst); |
46309d893 crypto: cryptd - ... |
634 |
ctx->queue = queue; |
0b535adfb crypto: cryptd - ... |
635 636 |
err = crypto_init_shash_spawn(&ctx->spawn, salg, ahash_crypto_instance(inst)); |
46309d893 crypto: cryptd - ... |
637 638 |
if (err) goto out_free_inst; |
466a7b9e3 crypto: cryptd - ... |
639 640 641 642 |
type = CRYPTO_ALG_ASYNC; if (alg->cra_flags & CRYPTO_ALG_INTERNAL) type |= CRYPTO_ALG_INTERNAL; inst->alg.halg.base.cra_flags = type; |
b8a28251c [CRYPTO] cryptd: ... |
643 |
|
0b535adfb crypto: cryptd - ... |
644 |
inst->alg.halg.digestsize = salg->digestsize; |
1a0783402 crypto: cryptd - ... |
645 |
inst->alg.halg.statesize = salg->statesize; |
0b535adfb crypto: cryptd - ... |
646 |
inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx); |
b8a28251c [CRYPTO] cryptd: ... |
647 |
|
0b535adfb crypto: cryptd - ... |
648 649 |
inst->alg.halg.base.cra_init = cryptd_hash_init_tfm; inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm; |
b8a28251c [CRYPTO] cryptd: ... |
650 |
|
0b535adfb crypto: cryptd - ... |
651 652 653 |
inst->alg.init = cryptd_hash_init_enqueue; inst->alg.update = cryptd_hash_update_enqueue; inst->alg.final = cryptd_hash_final_enqueue; |
6fba00d17 crypto: cryptd - ... |
654 655 656 |
inst->alg.finup = cryptd_hash_finup_enqueue; inst->alg.export = cryptd_hash_export; inst->alg.import = cryptd_hash_import; |
0b535adfb crypto: cryptd - ... |
657 658 |
inst->alg.setkey = cryptd_hash_setkey; inst->alg.digest = cryptd_hash_digest_enqueue; |
b8a28251c [CRYPTO] cryptd: ... |
659 |
|
0b535adfb crypto: cryptd - ... |
660 |
err = ahash_register_instance(tmpl, inst); |
9cd899a32 crypto: cryptd - ... |
661 662 663 664 665 |
if (err) { crypto_drop_shash(&ctx->spawn); out_free_inst: kfree(inst); } |
b8a28251c [CRYPTO] cryptd: ... |
666 667 |
out_put_alg: crypto_mod_put(alg); |
9cd899a32 crypto: cryptd - ... |
668 |
return err; |
b8a28251c [CRYPTO] cryptd: ... |
669 |
} |
92b9876bd crypto: cryptd - ... |
670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 |
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 crypto: cryptd - ... |
687 688 689 690 691 692 |
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 crypto: cryptd - ... |
693 |
struct cryptd_aead_ctx *ctx; |
ec9f2006f crypto: cryptd - ... |
694 |
crypto_completion_t compl; |
81760ea6a crypto: cryptd - ... |
695 696 |
struct crypto_aead *tfm; int refcnt; |
ec9f2006f crypto: cryptd - ... |
697 |
|
298c926c6 crypto: cryptd - ... |
698 |
rctx = aead_request_ctx(req); |
ec9f2006f crypto: cryptd - ... |
699 |
compl = rctx->complete; |
298c926c6 crypto: cryptd - ... |
700 |
|
31bd44e76 crypto: cryptd - ... |
701 |
tfm = crypto_aead_reqtfm(req); |
298c926c6 crypto: cryptd - ... |
702 703 704 705 |
if (unlikely(err == -EINPROGRESS)) goto out; aead_request_set_tfm(req, child); err = crypt( req ); |
81760ea6a crypto: cryptd - ... |
706 |
|
298c926c6 crypto: cryptd - ... |
707 |
out: |
81760ea6a crypto: cryptd - ... |
708 709 |
ctx = crypto_aead_ctx(tfm); refcnt = atomic_read(&ctx->refcnt); |
298c926c6 crypto: cryptd - ... |
710 |
local_bh_disable(); |
ec9f2006f crypto: cryptd - ... |
711 |
compl(&req->base, err); |
298c926c6 crypto: cryptd - ... |
712 |
local_bh_enable(); |
81760ea6a crypto: cryptd - ... |
713 714 715 |
if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt)) crypto_free_aead(tfm); |
298c926c6 crypto: cryptd - ... |
716 717 718 719 720 721 722 723 724 |
} 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 crypto: cryptd - ... |
725 |
cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt); |
298c926c6 crypto: cryptd - ... |
726 727 728 729 730 731 732 733 734 |
} 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 crypto: cryptd - ... |
735 |
cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt); |
298c926c6 crypto: cryptd - ... |
736 737 738 |
} static int cryptd_aead_enqueue(struct aead_request *req, |
3e3dc25fe crypto: Resolve s... |
739 |
crypto_completion_t compl) |
298c926c6 crypto: cryptd - ... |
740 741 742 743 744 745 |
{ 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 crypto: Resolve s... |
746 |
req->base.complete = compl; |
298c926c6 crypto: cryptd - ... |
747 748 749 750 751 752 753 754 755 756 757 758 |
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 crypto: cryptd - ... |
759 |
static int cryptd_aead_init_tfm(struct crypto_aead *tfm) |
298c926c6 crypto: cryptd - ... |
760 |
{ |
f614e546f crypto: cryptd - ... |
761 762 |
struct aead_instance *inst = aead_alg_instance(tfm); struct aead_instance_ctx *ictx = aead_instance_ctx(inst); |
298c926c6 crypto: cryptd - ... |
763 |
struct crypto_aead_spawn *spawn = &ictx->aead_spawn; |
f614e546f crypto: cryptd - ... |
764 |
struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm); |
298c926c6 crypto: cryptd - ... |
765 766 767 768 769 |
struct crypto_aead *cipher; cipher = crypto_spawn_aead(spawn); if (IS_ERR(cipher)) return PTR_ERR(cipher); |
298c926c6 crypto: cryptd - ... |
770 |
ctx->child = cipher; |
ec9f2006f crypto: cryptd - ... |
771 772 773 |
crypto_aead_set_reqsize( tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx), crypto_aead_reqsize(cipher))); |
298c926c6 crypto: cryptd - ... |
774 775 |
return 0; } |
f614e546f crypto: cryptd - ... |
776 |
static void cryptd_aead_exit_tfm(struct crypto_aead *tfm) |
298c926c6 crypto: cryptd - ... |
777 |
{ |
f614e546f crypto: cryptd - ... |
778 |
struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm); |
298c926c6 crypto: cryptd - ... |
779 780 781 782 783 784 785 786 |
crypto_free_aead(ctx->child); } static int cryptd_create_aead(struct crypto_template *tmpl, struct rtattr **tb, struct cryptd_queue *queue) { struct aead_instance_ctx *ctx; |
f614e546f crypto: cryptd - ... |
787 788 |
struct aead_instance *inst; struct aead_alg *alg; |
9b8c456e0 crypto: cryptd - ... |
789 790 |
const char *name; u32 type = 0; |
ec9f2006f crypto: cryptd - ... |
791 |
u32 mask = CRYPTO_ALG_ASYNC; |
298c926c6 crypto: cryptd - ... |
792 |
int err; |
466a7b9e3 crypto: cryptd - ... |
793 |
cryptd_check_internal(tb, &type, &mask); |
9b8c456e0 crypto: cryptd - ... |
794 795 796 |
name = crypto_attr_alg_name(tb[1]); if (IS_ERR(name)) return PTR_ERR(name); |
298c926c6 crypto: cryptd - ... |
797 |
|
9b8c456e0 crypto: cryptd - ... |
798 799 800 |
inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); if (!inst) return -ENOMEM; |
298c926c6 crypto: cryptd - ... |
801 |
|
f614e546f crypto: cryptd - ... |
802 |
ctx = aead_instance_ctx(inst); |
298c926c6 crypto: cryptd - ... |
803 |
ctx->queue = queue; |
f614e546f crypto: cryptd - ... |
804 |
crypto_set_aead_spawn(&ctx->aead_spawn, aead_crypto_instance(inst)); |
9b8c456e0 crypto: cryptd - ... |
805 |
err = crypto_grab_aead(&ctx->aead_spawn, name, type, mask); |
298c926c6 crypto: cryptd - ... |
806 807 |
if (err) goto out_free_inst; |
f614e546f crypto: cryptd - ... |
808 809 |
alg = crypto_spawn_aead_alg(&ctx->aead_spawn); err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base); |
9b8c456e0 crypto: cryptd - ... |
810 811 |
if (err) goto out_drop_aead; |
f614e546f crypto: cryptd - ... |
812 |
inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC | |
5e4b8c1fc crypto: aead - Re... |
813 |
(alg->base.cra_flags & CRYPTO_ALG_INTERNAL); |
f614e546f crypto: cryptd - ... |
814 |
inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx); |
298c926c6 crypto: cryptd - ... |
815 |
|
f614e546f crypto: cryptd - ... |
816 817 818 819 820 821 822 823 824 825 826 |
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; err = aead_register_instance(tmpl, inst); |
298c926c6 crypto: cryptd - ... |
827 |
if (err) { |
9b8c456e0 crypto: cryptd - ... |
828 829 |
out_drop_aead: crypto_drop_aead(&ctx->aead_spawn); |
298c926c6 crypto: cryptd - ... |
830 831 832 |
out_free_inst: kfree(inst); } |
298c926c6 crypto: cryptd - ... |
833 834 |
return err; } |
254eff771 crypto: cryptd - ... |
835 |
static struct cryptd_queue queue; |
124b53d02 [CRYPTO] cryptd: ... |
836 |
|
9cd899a32 crypto: cryptd - ... |
837 |
static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb) |
124b53d02 [CRYPTO] cryptd: ... |
838 839 840 841 842 |
{ struct crypto_attr_type *algt; algt = crypto_get_attr_type(tb); if (IS_ERR(algt)) |
9cd899a32 crypto: cryptd - ... |
843 |
return PTR_ERR(algt); |
124b53d02 [CRYPTO] cryptd: ... |
844 845 846 |
switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) { case CRYPTO_ALG_TYPE_BLKCIPHER: |
9cd899a32 crypto: cryptd - ... |
847 |
return cryptd_create_blkcipher(tmpl, tb, &queue); |
b8a28251c [CRYPTO] cryptd: ... |
848 |
case CRYPTO_ALG_TYPE_DIGEST: |
9cd899a32 crypto: cryptd - ... |
849 |
return cryptd_create_hash(tmpl, tb, &queue); |
298c926c6 crypto: cryptd - ... |
850 851 |
case CRYPTO_ALG_TYPE_AEAD: return cryptd_create_aead(tmpl, tb, &queue); |
124b53d02 [CRYPTO] cryptd: ... |
852 |
} |
9cd899a32 crypto: cryptd - ... |
853 |
return -EINVAL; |
124b53d02 [CRYPTO] cryptd: ... |
854 855 856 857 858 |
} static void cryptd_free(struct crypto_instance *inst) { struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst); |
0b535adfb crypto: cryptd - ... |
859 |
struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst); |
298c926c6 crypto: cryptd - ... |
860 |
struct aead_instance_ctx *aead_ctx = crypto_instance_ctx(inst); |
0b535adfb crypto: cryptd - ... |
861 862 863 864 865 866 |
switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) { case CRYPTO_ALG_TYPE_AHASH: crypto_drop_shash(&hctx->spawn); kfree(ahash_instance(inst)); return; |
298c926c6 crypto: cryptd - ... |
867 |
case CRYPTO_ALG_TYPE_AEAD: |
f614e546f crypto: cryptd - ... |
868 869 |
crypto_drop_aead(&aead_ctx->aead_spawn); kfree(aead_instance(inst)); |
298c926c6 crypto: cryptd - ... |
870 871 872 873 |
return; default: crypto_drop_spawn(&ctx->spawn); kfree(inst); |
0b535adfb crypto: cryptd - ... |
874 |
} |
124b53d02 [CRYPTO] cryptd: ... |
875 876 877 878 |
} static struct crypto_template cryptd_tmpl = { .name = "cryptd", |
9cd899a32 crypto: cryptd - ... |
879 |
.create = cryptd_create, |
124b53d02 [CRYPTO] cryptd: ... |
880 881 882 |
.free = cryptd_free, .module = THIS_MODULE, }; |
1cac2cbc7 crypto: cryptd - ... |
883 884 885 886 |
struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name, u32 type, u32 mask) { char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; |
81760ea6a crypto: cryptd - ... |
887 |
struct cryptd_blkcipher_ctx *ctx; |
505fd21d6 crypto: cryptd - ... |
888 |
struct crypto_tfm *tfm; |
1cac2cbc7 crypto: cryptd - ... |
889 890 891 892 |
if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) return ERR_PTR(-EINVAL); |
c012a79d0 crypto: cryptod -... |
893 |
type = crypto_skcipher_type(type); |
505fd21d6 crypto: cryptd - ... |
894 895 896 |
mask &= ~CRYPTO_ALG_TYPE_MASK; mask |= (CRYPTO_ALG_GENIV | CRYPTO_ALG_TYPE_BLKCIPHER_MASK); tfm = crypto_alloc_base(cryptd_alg_name, type, mask); |
1cac2cbc7 crypto: cryptd - ... |
897 898 |
if (IS_ERR(tfm)) return ERR_CAST(tfm); |
505fd21d6 crypto: cryptd - ... |
899 900 |
if (tfm->__crt_alg->cra_module != THIS_MODULE) { crypto_free_tfm(tfm); |
1cac2cbc7 crypto: cryptd - ... |
901 902 |
return ERR_PTR(-EINVAL); } |
81760ea6a crypto: cryptd - ... |
903 904 |
ctx = crypto_tfm_ctx(tfm); atomic_set(&ctx->refcnt, 1); |
505fd21d6 crypto: cryptd - ... |
905 |
return __cryptd_ablkcipher_cast(__crypto_ablkcipher_cast(tfm)); |
1cac2cbc7 crypto: cryptd - ... |
906 907 908 909 910 911 912 913 914 |
} EXPORT_SYMBOL_GPL(cryptd_alloc_ablkcipher); struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm) { struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base); return ctx->child; } EXPORT_SYMBOL_GPL(cryptd_ablkcipher_child); |
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bool cryptd_ablkcipher_queued(struct cryptd_ablkcipher *tfm) { struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base); return atomic_read(&ctx->refcnt) - 1; } EXPORT_SYMBOL_GPL(cryptd_ablkcipher_queued); |
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void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm) { |
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struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base); if (atomic_dec_and_test(&ctx->refcnt)) crypto_free_ablkcipher(&tfm->base); |
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} EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher); |
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struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name, u32 type, u32 mask) { char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; |
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struct cryptd_hash_ctx *ctx; |
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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); } |
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ctx = crypto_ahash_ctx(tfm); atomic_set(&ctx->refcnt, 1); |
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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); |
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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); |
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bool cryptd_ahash_queued(struct cryptd_ahash *tfm) { struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); return atomic_read(&ctx->refcnt) - 1; } EXPORT_SYMBOL_GPL(cryptd_ahash_queued); |
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void cryptd_free_ahash(struct cryptd_ahash *tfm) { |
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struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); if (atomic_dec_and_test(&ctx->refcnt)) crypto_free_ahash(&tfm->base); |
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} EXPORT_SYMBOL_GPL(cryptd_free_ahash); |
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struct cryptd_aead *cryptd_alloc_aead(const char *alg_name, u32 type, u32 mask) { char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; |
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struct cryptd_aead_ctx *ctx; |
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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); } |
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ctx = crypto_aead_ctx(tfm); atomic_set(&ctx->refcnt, 1); |
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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); |
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bool cryptd_aead_queued(struct cryptd_aead *tfm) { struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base); return atomic_read(&ctx->refcnt) - 1; } EXPORT_SYMBOL_GPL(cryptd_aead_queued); |
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void cryptd_free_aead(struct cryptd_aead *tfm) { |
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struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base); if (atomic_dec_and_test(&ctx->refcnt)) crypto_free_aead(&tfm->base); |
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} EXPORT_SYMBOL_GPL(cryptd_free_aead); |
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static int __init cryptd_init(void) { int err; |
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err = cryptd_init_queue(&queue, CRYPTD_MAX_CPU_QLEN); |
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if (err) return err; err = crypto_register_template(&cryptd_tmpl); if (err) |
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cryptd_fini_queue(&queue); |
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return err; } static void __exit cryptd_exit(void) { |
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cryptd_fini_queue(&queue); |
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crypto_unregister_template(&cryptd_tmpl); } |
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subsys_initcall(cryptd_init); |
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module_exit(cryptd_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Software async crypto daemon"); |
4943ba16b crypto: include c... |
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MODULE_ALIAS_CRYPTO("cryptd"); |