*
* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
*
+ * Added AEAD support to cryptd.
+ * Authors: Tadeusz Struk (tadeusz.struk@intel.com)
+ * Adrian Hoban <adrian.hoban@intel.com>
+ * Gabriele Paoloni <gabriele.paoloni@intel.com>
+ * Aidan O'Mahony (aidan.o.mahony@intel.com)
+ * Copyright (c) 2010, Intel Corporation.
+ *
* 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)
#include <crypto/algapi.h>
#include <crypto/internal/hash.h>
+#include <crypto/internal/aead.h>
#include <crypto/cryptd.h>
#include <crypto/crypto_wq.h>
#include <linux/err.h>
};
struct cryptd_queue {
- struct cryptd_cpu_queue *cpu_queue;
+ struct cryptd_cpu_queue __percpu *cpu_queue;
};
struct cryptd_instance_ctx {
struct cryptd_queue *queue;
};
+struct aead_instance_ctx {
+ struct crypto_aead_spawn aead_spawn;
+ struct cryptd_queue *queue;
+};
+
struct cryptd_blkcipher_ctx {
struct crypto_blkcipher *child;
};
struct shash_desc desc;
};
+struct cryptd_aead_ctx {
+ struct crypto_aead *child;
+};
+
+struct cryptd_aead_request_ctx {
+ crypto_completion_t complete;
+};
+
static void cryptd_queue_worker(struct work_struct *work);
static int cryptd_init_queue(struct cryptd_queue *queue,
struct cryptd_cpu_queue *cpu_queue;
cpu = get_cpu();
- cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
+ cpu_queue = this_cpu_ptr(queue->cpu_queue);
err = crypto_enqueue_request(&cpu_queue->queue, request);
queue_work_on(cpu, kcrypto_wq, &cpu_queue->work);
put_cpu();
crypto_free_blkcipher(ctx->child);
}
-static struct crypto_instance *cryptd_alloc_instance(struct crypto_alg *alg,
- unsigned int tail)
+static void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head,
+ unsigned int tail)
{
+ char *p;
struct crypto_instance *inst;
int err;
- inst = kzalloc(sizeof(*inst) + tail, GFP_KERNEL);
- if (!inst) {
- inst = ERR_PTR(-ENOMEM);
- goto out;
- }
+ p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL);
+ if (!p)
+ return ERR_PTR(-ENOMEM);
+
+ inst = (void *)(p + head);
err = -ENAMETOOLONG;
if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
inst->alg.cra_alignmask = alg->cra_alignmask;
out:
- return inst;
+ return p;
out_free_inst:
- kfree(inst);
- inst = ERR_PTR(err);
+ kfree(p);
+ p = ERR_PTR(err);
goto out;
}
-static struct crypto_instance *cryptd_alloc_blkcipher(
- struct rtattr **tb, struct cryptd_queue *queue)
+static int cryptd_create_blkcipher(struct crypto_template *tmpl,
+ struct rtattr **tb,
+ struct cryptd_queue *queue)
{
struct cryptd_instance_ctx *ctx;
struct crypto_instance *inst;
alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_BLKCIPHER,
CRYPTO_ALG_TYPE_MASK);
if (IS_ERR(alg))
- return ERR_CAST(alg);
+ return PTR_ERR(alg);
- inst = cryptd_alloc_instance(alg, sizeof(*ctx));
+ inst = cryptd_alloc_instance(alg, 0, sizeof(*ctx));
+ err = PTR_ERR(inst);
if (IS_ERR(inst))
goto out_put_alg;
inst->alg.cra_ablkcipher.encrypt = cryptd_blkcipher_encrypt_enqueue;
inst->alg.cra_ablkcipher.decrypt = cryptd_blkcipher_decrypt_enqueue;
+ err = crypto_register_instance(tmpl, inst);
+ if (err) {
+ crypto_drop_spawn(&ctx->spawn);
+out_free_inst:
+ kfree(inst);
+ }
+
out_put_alg:
crypto_mod_put(alg);
- return inst;
-
-out_free_inst:
- kfree(inst);
- inst = ERR_PTR(err);
- goto out_put_alg;
+ return err;
}
static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)
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);
return cryptd_hash_enqueue(req, cryptd_hash_digest);
}
-static struct crypto_instance *cryptd_alloc_hash(
- struct rtattr **tb, struct cryptd_queue *queue)
+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 crypto_instance *inst;
+ struct ahash_instance *inst;
struct shash_alg *salg;
struct crypto_alg *alg;
int err;
salg = shash_attr_alg(tb[1], 0, 0);
if (IS_ERR(salg))
- return ERR_CAST(salg);
+ return PTR_ERR(salg);
alg = &salg->base;
- inst = cryptd_alloc_instance(alg, sizeof(*ctx));
+ inst = cryptd_alloc_instance(alg, ahash_instance_headroom(),
+ sizeof(*ctx));
+ err = PTR_ERR(inst);
if (IS_ERR(inst))
goto out_put_alg;
- ctx = crypto_instance_ctx(inst);
+ ctx = ahash_instance_ctx(inst);
ctx->queue = queue;
- err = crypto_init_shash_spawn(&ctx->spawn, salg, inst);
+ err = crypto_init_shash_spawn(&ctx->spawn, salg,
+ ahash_crypto_instance(inst));
if (err)
goto out_free_inst;
- inst->alg.cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC;
- inst->alg.cra_type = &crypto_ahash_type;
+ inst->alg.halg.base.cra_flags = CRYPTO_ALG_ASYNC;
+
+ inst->alg.halg.digestsize = salg->digestsize;
+ inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
- inst->alg.cra_ahash.digestsize = salg->digestsize;
- inst->alg.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.cra_init = cryptd_hash_init_tfm;
- inst->alg.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;
- inst->alg.cra_ahash.init = cryptd_hash_init_enqueue;
- inst->alg.cra_ahash.update = cryptd_hash_update_enqueue;
- inst->alg.cra_ahash.final = cryptd_hash_final_enqueue;
- inst->alg.cra_ahash.setkey = cryptd_hash_setkey;
- inst->alg.cra_ahash.digest = cryptd_hash_digest_enqueue;
+ 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 inst;
+ 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 complete)
+{
+ 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 = complete;
+ 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;
+ tfm->crt_aead.reqsize = 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;
+ int err;
+
+ alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_AEAD,
+ CRYPTO_ALG_TYPE_MASK);
+ if (IS_ERR(alg))
+ return PTR_ERR(alg);
+
+ inst = cryptd_alloc_instance(alg, 0, sizeof(*ctx));
+ err = PTR_ERR(inst);
+ if (IS_ERR(inst))
+ goto out_put_alg;
+
+ ctx = crypto_instance_ctx(inst);
+ ctx->queue = queue;
+
+ err = crypto_init_spawn(&ctx->aead_spawn.base, alg, inst,
+ CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
+ if (err)
+ goto out_free_inst;
+ inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC;
+ 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) {
+ crypto_drop_spawn(&ctx->aead_spawn.base);
out_free_inst:
- kfree(inst);
- inst = ERR_PTR(err);
- goto out_put_alg;
+ kfree(inst);
+ }
+out_put_alg:
+ crypto_mod_put(alg);
+ return err;
}
static struct cryptd_queue queue;
-static struct crypto_instance *cryptd_alloc(struct rtattr **tb)
+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 ERR_CAST(algt);
+ return PTR_ERR(algt);
switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
case CRYPTO_ALG_TYPE_BLKCIPHER:
- return cryptd_alloc_blkcipher(tb, &queue);
+ return cryptd_create_blkcipher(tmpl, tb, &queue);
case CRYPTO_ALG_TYPE_DIGEST:
- return cryptd_alloc_hash(tb, &queue);
+ return cryptd_create_hash(tmpl, tb, &queue);
+ case CRYPTO_ALG_TYPE_AEAD:
+ return cryptd_create_aead(tmpl, tb, &queue);
}
- return ERR_PTR(-EINVAL);
+ 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);
- crypto_drop_spawn(&ctx->spawn);
- kfree(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",
- .alloc = cryptd_alloc,
+ .create = cryptd_create,
.free = cryptd_free,
.module = THIS_MODULE,
};
}
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;
projects / linux-flexiantxendom0-natty.git / blobdiff