1007 lines
26 KiB
C
1007 lines
26 KiB
C
/*
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* Software async crypto daemon.
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*
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* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
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*
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* Added AEAD support to cryptd.
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* Authors: Tadeusz Struk (tadeusz.struk@intel.com)
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* Adrian Hoban <adrian.hoban@intel.com>
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* Gabriele Paoloni <gabriele.paoloni@intel.com>
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* Aidan O'Mahony (aidan.o.mahony@intel.com)
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* Copyright (c) 2010, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#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/err.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/scatterlist.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#define CRYPTD_MAX_CPU_QLEN 100
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struct cryptd_cpu_queue {
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struct crypto_queue queue;
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struct work_struct work;
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};
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struct cryptd_queue {
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struct cryptd_cpu_queue __percpu *cpu_queue;
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};
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struct cryptd_instance_ctx {
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struct crypto_spawn spawn;
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struct cryptd_queue *queue;
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};
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struct hashd_instance_ctx {
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struct crypto_shash_spawn spawn;
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struct cryptd_queue *queue;
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};
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struct aead_instance_ctx {
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struct crypto_aead_spawn aead_spawn;
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struct cryptd_queue *queue;
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};
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struct cryptd_blkcipher_ctx {
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struct crypto_blkcipher *child;
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};
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struct cryptd_blkcipher_request_ctx {
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crypto_completion_t complete;
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};
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struct cryptd_hash_ctx {
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struct crypto_shash *child;
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};
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struct cryptd_hash_request_ctx {
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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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struct crypto_aead *child;
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};
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struct cryptd_aead_request_ctx {
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crypto_completion_t complete;
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};
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static void cryptd_queue_worker(struct work_struct *work);
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static int cryptd_init_queue(struct cryptd_queue *queue,
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unsigned int max_cpu_qlen)
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{
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int cpu;
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struct cryptd_cpu_queue *cpu_queue;
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queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue);
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if (!queue->cpu_queue)
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return -ENOMEM;
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for_each_possible_cpu(cpu) {
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cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
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crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
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INIT_WORK(&cpu_queue->work, cryptd_queue_worker);
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}
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return 0;
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}
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static void cryptd_fini_queue(struct cryptd_queue *queue)
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{
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int cpu;
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struct cryptd_cpu_queue *cpu_queue;
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for_each_possible_cpu(cpu) {
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cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
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BUG_ON(cpu_queue->queue.qlen);
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}
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free_percpu(queue->cpu_queue);
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}
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static int cryptd_enqueue_request(struct cryptd_queue *queue,
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struct crypto_async_request *request)
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{
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int cpu, err;
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struct cryptd_cpu_queue *cpu_queue;
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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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queue_work_on(cpu, kcrypto_wq, &cpu_queue->work);
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put_cpu();
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return err;
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}
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/* Called in workqueue context, do one real cryption work (via
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* req->complete) and reschedule itself if there are more work to
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* do. */
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static void cryptd_queue_worker(struct work_struct *work)
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{
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struct cryptd_cpu_queue *cpu_queue;
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struct crypto_async_request *req, *backlog;
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cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
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/*
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* Only handle one request at a time to avoid hogging crypto workqueue.
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* preempt_disable/enable is used to prevent being preempted by
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* cryptd_enqueue_request(). local_bh_disable/enable is used to prevent
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* cryptd_enqueue_request() being accessed from software interrupts.
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*/
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local_bh_disable();
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preempt_disable();
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backlog = crypto_get_backlog(&cpu_queue->queue);
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req = crypto_dequeue_request(&cpu_queue->queue);
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preempt_enable();
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local_bh_enable();
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if (!req)
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return;
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if (backlog)
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backlog->complete(backlog, -EINPROGRESS);
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req->complete(req, 0);
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if (cpu_queue->queue.qlen)
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queue_work(kcrypto_wq, &cpu_queue->work);
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}
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static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm)
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{
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struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
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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,
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u32 *mask)
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{
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struct crypto_attr_type *algt;
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algt = crypto_get_attr_type(tb);
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if (IS_ERR(algt))
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return;
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if ((algt->type & CRYPTO_ALG_INTERNAL))
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*type |= CRYPTO_ALG_INTERNAL;
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if ((algt->mask & CRYPTO_ALG_INTERNAL))
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*mask |= CRYPTO_ALG_INTERNAL;
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}
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static int cryptd_blkcipher_setkey(struct crypto_ablkcipher *parent,
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const u8 *key, unsigned int keylen)
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{
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struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(parent);
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struct crypto_blkcipher *child = ctx->child;
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int err;
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crypto_blkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
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crypto_blkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) &
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CRYPTO_TFM_REQ_MASK);
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err = crypto_blkcipher_setkey(child, key, keylen);
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crypto_ablkcipher_set_flags(parent, crypto_blkcipher_get_flags(child) &
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CRYPTO_TFM_RES_MASK);
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return err;
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}
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static void cryptd_blkcipher_crypt(struct ablkcipher_request *req,
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struct crypto_blkcipher *child,
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int err,
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int (*crypt)(struct blkcipher_desc *desc,
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struct scatterlist *dst,
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struct scatterlist *src,
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unsigned int len))
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{
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struct cryptd_blkcipher_request_ctx *rctx;
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struct blkcipher_desc desc;
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rctx = ablkcipher_request_ctx(req);
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if (unlikely(err == -EINPROGRESS))
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goto out;
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desc.tfm = child;
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desc.info = req->info;
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desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
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err = crypt(&desc, req->dst, req->src, req->nbytes);
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req->base.complete = rctx->complete;
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out:
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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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}
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static void cryptd_blkcipher_encrypt(struct crypto_async_request *req, int err)
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{
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struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
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struct crypto_blkcipher *child = ctx->child;
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cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
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crypto_blkcipher_crt(child)->encrypt);
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}
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static void cryptd_blkcipher_decrypt(struct crypto_async_request *req, int err)
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{
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struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
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struct crypto_blkcipher *child = ctx->child;
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cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
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crypto_blkcipher_crt(child)->decrypt);
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}
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static int cryptd_blkcipher_enqueue(struct ablkcipher_request *req,
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crypto_completion_t compl)
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{
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struct cryptd_blkcipher_request_ctx *rctx = ablkcipher_request_ctx(req);
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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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}
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static int cryptd_blkcipher_encrypt_enqueue(struct ablkcipher_request *req)
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{
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return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_encrypt);
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}
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static int cryptd_blkcipher_decrypt_enqueue(struct ablkcipher_request *req)
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{
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return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_decrypt);
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}
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static int cryptd_blkcipher_init_tfm(struct crypto_tfm *tfm)
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{
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struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
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struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
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struct crypto_spawn *spawn = &ictx->spawn;
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struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
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struct crypto_blkcipher *cipher;
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cipher = crypto_spawn_blkcipher(spawn);
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if (IS_ERR(cipher))
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return PTR_ERR(cipher);
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ctx->child = cipher;
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tfm->crt_ablkcipher.reqsize =
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sizeof(struct cryptd_blkcipher_request_ctx);
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return 0;
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}
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static void cryptd_blkcipher_exit_tfm(struct crypto_tfm *tfm)
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{
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struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
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crypto_free_blkcipher(ctx->child);
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}
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static int cryptd_init_instance(struct crypto_instance *inst,
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struct crypto_alg *alg)
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{
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if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
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"cryptd(%s)",
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alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
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return -ENAMETOOLONG;
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memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
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inst->alg.cra_priority = alg->cra_priority + 50;
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inst->alg.cra_blocksize = alg->cra_blocksize;
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inst->alg.cra_alignmask = alg->cra_alignmask;
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return 0;
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}
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static void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head,
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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);
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if (!p)
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return ERR_PTR(-ENOMEM);
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inst = (void *)(p + head);
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err = cryptd_init_instance(inst, alg);
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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);
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p = ERR_PTR(err);
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goto out;
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}
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static int cryptd_create_blkcipher(struct crypto_template *tmpl,
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struct rtattr **tb,
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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;
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struct crypto_alg *alg;
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u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
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u32 mask = CRYPTO_ALG_TYPE_MASK;
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int err;
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cryptd_check_internal(tb, &type, &mask);
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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))
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goto out_put_alg;
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ctx = crypto_instance_ctx(inst);
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ctx->queue = queue;
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err = crypto_init_spawn(&ctx->spawn, alg, inst,
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CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
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if (err)
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goto out_free_inst;
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type = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC;
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if (alg->cra_flags & CRYPTO_ALG_INTERNAL)
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type |= CRYPTO_ALG_INTERNAL;
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inst->alg.cra_flags = type;
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inst->alg.cra_type = &crypto_ablkcipher_type;
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inst->alg.cra_ablkcipher.ivsize = alg->cra_blkcipher.ivsize;
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inst->alg.cra_ablkcipher.min_keysize = alg->cra_blkcipher.min_keysize;
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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);
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inst->alg.cra_init = cryptd_blkcipher_init_tfm;
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inst->alg.cra_exit = cryptd_blkcipher_exit_tfm;
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inst->alg.cra_ablkcipher.setkey = cryptd_blkcipher_setkey;
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inst->alg.cra_ablkcipher.encrypt = cryptd_blkcipher_encrypt_enqueue;
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inst->alg.cra_ablkcipher.decrypt = cryptd_blkcipher_decrypt_enqueue;
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err = crypto_register_instance(tmpl, inst);
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if (err) {
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crypto_drop_spawn(&ctx->spawn);
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out_free_inst:
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kfree(inst);
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}
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out_put_alg:
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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)
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{
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struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
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struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);
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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);
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if (IS_ERR(hash))
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return PTR_ERR(hash);
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ctx->child = hash;
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crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
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sizeof(struct cryptd_hash_request_ctx) +
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crypto_shash_descsize(hash));
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return 0;
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}
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static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
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{
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struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
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crypto_free_shash(ctx->child);
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}
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static int cryptd_hash_setkey(struct crypto_ahash *parent,
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const u8 *key, unsigned int keylen)
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{
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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);
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crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &
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CRYPTO_TFM_REQ_MASK);
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err = crypto_shash_setkey(child, key, keylen);
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crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) &
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CRYPTO_TFM_RES_MASK);
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return err;
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}
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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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{
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struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
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struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
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struct cryptd_queue *queue =
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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_init(struct crypto_async_request *req_async, int err)
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{
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struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
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struct crypto_shash *child = ctx->child;
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struct ahash_request *req = ahash_request_cast(req_async);
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struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
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struct shash_desc *desc = &rctx->desc;
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if (unlikely(err == -EINPROGRESS))
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goto out;
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desc->tfm = child;
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desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
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err = crypto_shash_init(desc);
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req->base.complete = rctx->complete;
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out:
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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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}
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static int cryptd_hash_init_enqueue(struct ahash_request *req)
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{
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return cryptd_hash_enqueue(req, cryptd_hash_init);
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}
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static void cryptd_hash_update(struct crypto_async_request *req_async, int err)
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{
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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);
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if (unlikely(err == -EINPROGRESS))
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goto out;
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err = shash_ahash_update(req, &rctx->desc);
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req->base.complete = rctx->complete;
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out:
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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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}
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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)
|
|
{
|
|
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:
|
|
local_bh_disable();
|
|
rctx->complete(&req->base, err);
|
|
local_bh_enable();
|
|
}
|
|
|
|
static int cryptd_hash_final_enqueue(struct ahash_request *req)
|
|
{
|
|
return cryptd_hash_enqueue(req, cryptd_hash_final);
|
|
}
|
|
|
|
static void cryptd_hash_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:
|
|
local_bh_disable();
|
|
rctx->complete(&req->base, err);
|
|
local_bh_enable();
|
|
}
|
|
|
|
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;
|
|
desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
|
|
|
|
err = shash_ahash_digest(req, desc);
|
|
|
|
req->base.complete = rctx->complete;
|
|
|
|
out:
|
|
local_bh_disable();
|
|
rctx->complete(&req->base, err);
|
|
local_bh_enable();
|
|
}
|
|
|
|
static int cryptd_hash_digest_enqueue(struct ahash_request *req)
|
|
{
|
|
return cryptd_hash_enqueue(req, cryptd_hash_digest);
|
|
}
|
|
|
|
static 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 cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
|
|
|
|
return crypto_shash_import(&rctx->desc, in);
|
|
}
|
|
|
|
static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
|
|
struct cryptd_queue *queue)
|
|
{
|
|
struct hashd_instance_ctx *ctx;
|
|
struct ahash_instance *inst;
|
|
struct shash_alg *salg;
|
|
struct crypto_alg *alg;
|
|
u32 type = 0;
|
|
u32 mask = 0;
|
|
int err;
|
|
|
|
cryptd_check_internal(tb, &type, &mask);
|
|
|
|
salg = shash_attr_alg(tb[1], type, mask);
|
|
if (IS_ERR(salg))
|
|
return PTR_ERR(salg);
|
|
|
|
alg = &salg->base;
|
|
inst = cryptd_alloc_instance(alg, ahash_instance_headroom(),
|
|
sizeof(*ctx));
|
|
err = PTR_ERR(inst);
|
|
if (IS_ERR(inst))
|
|
goto out_put_alg;
|
|
|
|
ctx = ahash_instance_ctx(inst);
|
|
ctx->queue = queue;
|
|
|
|
err = crypto_init_shash_spawn(&ctx->spawn, salg,
|
|
ahash_crypto_instance(inst));
|
|
if (err)
|
|
goto out_free_inst;
|
|
|
|
type = CRYPTO_ALG_ASYNC;
|
|
if (alg->cra_flags & CRYPTO_ALG_INTERNAL)
|
|
type |= CRYPTO_ALG_INTERNAL;
|
|
inst->alg.halg.base.cra_flags = type;
|
|
|
|
inst->alg.halg.digestsize = salg->digestsize;
|
|
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;
|
|
inst->alg.setkey = cryptd_hash_setkey;
|
|
inst->alg.digest = cryptd_hash_digest_enqueue;
|
|
|
|
err = ahash_register_instance(tmpl, inst);
|
|
if (err) {
|
|
crypto_drop_shash(&ctx->spawn);
|
|
out_free_inst:
|
|
kfree(inst);
|
|
}
|
|
|
|
out_put_alg:
|
|
crypto_mod_put(alg);
|
|
return err;
|
|
}
|
|
|
|
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;
|
|
rctx = aead_request_ctx(req);
|
|
|
|
if (unlikely(err == -EINPROGRESS))
|
|
goto out;
|
|
aead_request_set_tfm(req, child);
|
|
err = crypt( req );
|
|
req->base.complete = rctx->complete;
|
|
out:
|
|
local_bh_disable();
|
|
rctx->complete(&req->base, err);
|
|
local_bh_enable();
|
|
}
|
|
|
|
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_crt(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_crt(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_tfm *tfm)
|
|
{
|
|
struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
|
|
struct aead_instance_ctx *ictx = crypto_instance_ctx(inst);
|
|
struct crypto_aead_spawn *spawn = &ictx->aead_spawn;
|
|
struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
struct crypto_aead *cipher;
|
|
|
|
cipher = crypto_spawn_aead(spawn);
|
|
if (IS_ERR(cipher))
|
|
return PTR_ERR(cipher);
|
|
|
|
crypto_aead_set_flags(cipher, CRYPTO_TFM_REQ_MAY_SLEEP);
|
|
ctx->child = cipher;
|
|
crypto_aead_set_reqsize(__crypto_aead_cast(tfm),
|
|
sizeof(struct cryptd_aead_request_ctx));
|
|
return 0;
|
|
}
|
|
|
|
static void cryptd_aead_exit_tfm(struct crypto_tfm *tfm)
|
|
{
|
|
struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
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;
|
|
struct crypto_instance *inst;
|
|
struct crypto_alg *alg;
|
|
const char *name;
|
|
u32 type = 0;
|
|
u32 mask = 0;
|
|
int err;
|
|
|
|
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 = crypto_instance_ctx(inst);
|
|
ctx->queue = queue;
|
|
|
|
crypto_set_aead_spawn(&ctx->aead_spawn, inst);
|
|
err = crypto_grab_aead(&ctx->aead_spawn, name, type, mask);
|
|
if (err)
|
|
goto out_free_inst;
|
|
|
|
alg = crypto_aead_spawn_alg(&ctx->aead_spawn);
|
|
err = cryptd_init_instance(inst, alg);
|
|
if (err)
|
|
goto out_drop_aead;
|
|
|
|
type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC;
|
|
if (alg->cra_flags & CRYPTO_ALG_INTERNAL)
|
|
type |= CRYPTO_ALG_INTERNAL;
|
|
inst->alg.cra_flags = type;
|
|
inst->alg.cra_type = alg->cra_type;
|
|
inst->alg.cra_ctxsize = sizeof(struct cryptd_aead_ctx);
|
|
inst->alg.cra_init = cryptd_aead_init_tfm;
|
|
inst->alg.cra_exit = cryptd_aead_exit_tfm;
|
|
inst->alg.cra_aead.setkey = alg->cra_aead.setkey;
|
|
inst->alg.cra_aead.setauthsize = alg->cra_aead.setauthsize;
|
|
inst->alg.cra_aead.geniv = alg->cra_aead.geniv;
|
|
inst->alg.cra_aead.ivsize = alg->cra_aead.ivsize;
|
|
inst->alg.cra_aead.maxauthsize = alg->cra_aead.maxauthsize;
|
|
inst->alg.cra_aead.encrypt = cryptd_aead_encrypt_enqueue;
|
|
inst->alg.cra_aead.decrypt = cryptd_aead_decrypt_enqueue;
|
|
inst->alg.cra_aead.givencrypt = alg->cra_aead.givencrypt;
|
|
inst->alg.cra_aead.givdecrypt = alg->cra_aead.givdecrypt;
|
|
|
|
err = crypto_register_instance(tmpl, inst);
|
|
if (err) {
|
|
out_drop_aead:
|
|
crypto_drop_aead(&ctx->aead_spawn);
|
|
out_free_inst:
|
|
kfree(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_BLKCIPHER:
|
|
return cryptd_create_blkcipher(tmpl, tb, &queue);
|
|
case CRYPTO_ALG_TYPE_DIGEST:
|
|
return cryptd_create_hash(tmpl, tb, &queue);
|
|
case CRYPTO_ALG_TYPE_AEAD:
|
|
return cryptd_create_aead(tmpl, tb, &queue);
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void cryptd_free(struct crypto_instance *inst)
|
|
{
|
|
struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst);
|
|
struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst);
|
|
struct aead_instance_ctx *aead_ctx = crypto_instance_ctx(inst);
|
|
|
|
switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) {
|
|
case CRYPTO_ALG_TYPE_AHASH:
|
|
crypto_drop_shash(&hctx->spawn);
|
|
kfree(ahash_instance(inst));
|
|
return;
|
|
case CRYPTO_ALG_TYPE_AEAD:
|
|
crypto_drop_spawn(&aead_ctx->aead_spawn.base);
|
|
kfree(inst);
|
|
return;
|
|
default:
|
|
crypto_drop_spawn(&ctx->spawn);
|
|
kfree(inst);
|
|
}
|
|
}
|
|
|
|
static struct crypto_template cryptd_tmpl = {
|
|
.name = "cryptd",
|
|
.create = cryptd_create,
|
|
.free = cryptd_free,
|
|
.module = THIS_MODULE,
|
|
};
|
|
|
|
struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name,
|
|
u32 type, u32 mask)
|
|
{
|
|
char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
|
|
struct crypto_tfm *tfm;
|
|
|
|
if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
|
|
"cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
|
|
return ERR_PTR(-EINVAL);
|
|
type &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV);
|
|
type |= CRYPTO_ALG_TYPE_BLKCIPHER;
|
|
mask &= ~CRYPTO_ALG_TYPE_MASK;
|
|
mask |= (CRYPTO_ALG_GENIV | CRYPTO_ALG_TYPE_BLKCIPHER_MASK);
|
|
tfm = crypto_alloc_base(cryptd_alg_name, type, mask);
|
|
if (IS_ERR(tfm))
|
|
return ERR_CAST(tfm);
|
|
if (tfm->__crt_alg->cra_module != THIS_MODULE) {
|
|
crypto_free_tfm(tfm);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
return __cryptd_ablkcipher_cast(__crypto_ablkcipher_cast(tfm));
|
|
}
|
|
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);
|
|
|
|
void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm)
|
|
{
|
|
crypto_free_ablkcipher(&tfm->base);
|
|
}
|
|
EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher);
|
|
|
|
struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
|
|
u32 type, u32 mask)
|
|
{
|
|
char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
|
|
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);
|
|
}
|
|
|
|
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);
|
|
|
|
void cryptd_free_ahash(struct cryptd_ahash *tfm)
|
|
{
|
|
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 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);
|
|
}
|
|
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);
|
|
|
|
void cryptd_free_aead(struct cryptd_aead *tfm)
|
|
{
|
|
crypto_free_aead(&tfm->base);
|
|
}
|
|
EXPORT_SYMBOL_GPL(cryptd_free_aead);
|
|
|
|
static int __init cryptd_init(void)
|
|
{
|
|
int err;
|
|
|
|
err = cryptd_init_queue(&queue, CRYPTD_MAX_CPU_QLEN);
|
|
if (err)
|
|
return err;
|
|
|
|
err = crypto_register_template(&cryptd_tmpl);
|
|
if (err)
|
|
cryptd_fini_queue(&queue);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __exit cryptd_exit(void)
|
|
{
|
|
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");
|