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-rw-r--r--crypto/pcrypt.c386
1 files changed, 386 insertions, 0 deletions
diff --git a/crypto/pcrypt.c b/crypto/pcrypt.c
new file mode 100644
index 000000000..005a36cb2
--- /dev/null
+++ b/crypto/pcrypt.c
@@ -0,0 +1,386 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * pcrypt - Parallel crypto wrapper.
+ *
+ * Copyright (C) 2009 secunet Security Networks AG
+ * Copyright (C) 2009 Steffen Klassert <steffen.klassert@secunet.com>
+ */
+
+#include <crypto/algapi.h>
+#include <crypto/internal/aead.h>
+#include <linux/atomic.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/kobject.h>
+#include <linux/cpu.h>
+#include <crypto/pcrypt.h>
+
+static struct padata_instance *pencrypt;
+static struct padata_instance *pdecrypt;
+static struct kset *pcrypt_kset;
+
+struct pcrypt_instance_ctx {
+ struct crypto_aead_spawn spawn;
+ struct padata_shell *psenc;
+ struct padata_shell *psdec;
+ atomic_t tfm_count;
+};
+
+struct pcrypt_aead_ctx {
+ struct crypto_aead *child;
+ unsigned int cb_cpu;
+};
+
+static inline struct pcrypt_instance_ctx *pcrypt_tfm_ictx(
+ struct crypto_aead *tfm)
+{
+ return aead_instance_ctx(aead_alg_instance(tfm));
+}
+
+static int pcrypt_aead_setkey(struct crypto_aead *parent,
+ const u8 *key, unsigned int keylen)
+{
+ struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
+
+ return crypto_aead_setkey(ctx->child, key, keylen);
+}
+
+static int pcrypt_aead_setauthsize(struct crypto_aead *parent,
+ unsigned int authsize)
+{
+ struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
+
+ return crypto_aead_setauthsize(ctx->child, authsize);
+}
+
+static void pcrypt_aead_serial(struct padata_priv *padata)
+{
+ struct pcrypt_request *preq = pcrypt_padata_request(padata);
+ struct aead_request *req = pcrypt_request_ctx(preq);
+
+ aead_request_complete(req->base.data, padata->info);
+}
+
+static void pcrypt_aead_done(struct crypto_async_request *areq, int err)
+{
+ struct aead_request *req = areq->data;
+ struct pcrypt_request *preq = aead_request_ctx(req);
+ struct padata_priv *padata = pcrypt_request_padata(preq);
+
+ padata->info = err;
+
+ padata_do_serial(padata);
+}
+
+static void pcrypt_aead_enc(struct padata_priv *padata)
+{
+ struct pcrypt_request *preq = pcrypt_padata_request(padata);
+ struct aead_request *req = pcrypt_request_ctx(preq);
+ int ret;
+
+ ret = crypto_aead_encrypt(req);
+
+ if (ret == -EINPROGRESS)
+ return;
+
+ padata->info = ret;
+ padata_do_serial(padata);
+}
+
+static int pcrypt_aead_encrypt(struct aead_request *req)
+{
+ int err;
+ struct pcrypt_request *preq = aead_request_ctx(req);
+ struct aead_request *creq = pcrypt_request_ctx(preq);
+ struct padata_priv *padata = pcrypt_request_padata(preq);
+ struct crypto_aead *aead = crypto_aead_reqtfm(req);
+ struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
+ u32 flags = aead_request_flags(req);
+ struct pcrypt_instance_ctx *ictx;
+
+ ictx = pcrypt_tfm_ictx(aead);
+
+ memset(padata, 0, sizeof(struct padata_priv));
+
+ padata->parallel = pcrypt_aead_enc;
+ padata->serial = pcrypt_aead_serial;
+
+ aead_request_set_tfm(creq, ctx->child);
+ aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
+ pcrypt_aead_done, req);
+ aead_request_set_crypt(creq, req->src, req->dst,
+ req->cryptlen, req->iv);
+ aead_request_set_ad(creq, req->assoclen);
+
+ err = padata_do_parallel(ictx->psenc, padata, &ctx->cb_cpu);
+ if (!err)
+ return -EINPROGRESS;
+ if (err == -EBUSY)
+ return -EAGAIN;
+
+ return err;
+}
+
+static void pcrypt_aead_dec(struct padata_priv *padata)
+{
+ struct pcrypt_request *preq = pcrypt_padata_request(padata);
+ struct aead_request *req = pcrypt_request_ctx(preq);
+ int ret;
+
+ ret = crypto_aead_decrypt(req);
+
+ if (ret == -EINPROGRESS)
+ return;
+
+ padata->info = ret;
+ padata_do_serial(padata);
+}
+
+static int pcrypt_aead_decrypt(struct aead_request *req)
+{
+ int err;
+ struct pcrypt_request *preq = aead_request_ctx(req);
+ struct aead_request *creq = pcrypt_request_ctx(preq);
+ struct padata_priv *padata = pcrypt_request_padata(preq);
+ struct crypto_aead *aead = crypto_aead_reqtfm(req);
+ struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
+ u32 flags = aead_request_flags(req);
+ struct pcrypt_instance_ctx *ictx;
+
+ ictx = pcrypt_tfm_ictx(aead);
+
+ memset(padata, 0, sizeof(struct padata_priv));
+
+ padata->parallel = pcrypt_aead_dec;
+ padata->serial = pcrypt_aead_serial;
+
+ aead_request_set_tfm(creq, ctx->child);
+ aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
+ pcrypt_aead_done, req);
+ aead_request_set_crypt(creq, req->src, req->dst,
+ req->cryptlen, req->iv);
+ aead_request_set_ad(creq, req->assoclen);
+
+ err = padata_do_parallel(ictx->psdec, padata, &ctx->cb_cpu);
+ if (!err)
+ return -EINPROGRESS;
+ if (err == -EBUSY)
+ return -EAGAIN;
+
+ return err;
+}
+
+static int pcrypt_aead_init_tfm(struct crypto_aead *tfm)
+{
+ int cpu, cpu_index;
+ struct aead_instance *inst = aead_alg_instance(tfm);
+ struct pcrypt_instance_ctx *ictx = aead_instance_ctx(inst);
+ struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
+ struct crypto_aead *cipher;
+
+ cpu_index = (unsigned int)atomic_inc_return(&ictx->tfm_count) %
+ cpumask_weight(cpu_online_mask);
+
+ ctx->cb_cpu = cpumask_first(cpu_online_mask);
+ for (cpu = 0; cpu < cpu_index; cpu++)
+ ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask);
+
+ cipher = crypto_spawn_aead(&ictx->spawn);
+
+ if (IS_ERR(cipher))
+ return PTR_ERR(cipher);
+
+ ctx->child = cipher;
+ crypto_aead_set_reqsize(tfm, sizeof(struct pcrypt_request) +
+ sizeof(struct aead_request) +
+ crypto_aead_reqsize(cipher));
+
+ return 0;
+}
+
+static void pcrypt_aead_exit_tfm(struct crypto_aead *tfm)
+{
+ struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
+
+ crypto_free_aead(ctx->child);
+}
+
+static void pcrypt_free(struct aead_instance *inst)
+{
+ struct pcrypt_instance_ctx *ctx = aead_instance_ctx(inst);
+
+ crypto_drop_aead(&ctx->spawn);
+ padata_free_shell(ctx->psdec);
+ padata_free_shell(ctx->psenc);
+ kfree(inst);
+}
+
+static int pcrypt_init_instance(struct crypto_instance *inst,
+ struct crypto_alg *alg)
+{
+ if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
+ "pcrypt(%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 + 100;
+ inst->alg.cra_blocksize = alg->cra_blocksize;
+ inst->alg.cra_alignmask = alg->cra_alignmask;
+
+ return 0;
+}
+
+static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb,
+ struct crypto_attr_type *algt)
+{
+ struct pcrypt_instance_ctx *ctx;
+ struct aead_instance *inst;
+ struct aead_alg *alg;
+ u32 mask = crypto_algt_inherited_mask(algt);
+ int err;
+
+ inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
+ if (!inst)
+ return -ENOMEM;
+
+ err = -ENOMEM;
+
+ ctx = aead_instance_ctx(inst);
+ ctx->psenc = padata_alloc_shell(pencrypt);
+ if (!ctx->psenc)
+ goto err_free_inst;
+
+ ctx->psdec = padata_alloc_shell(pdecrypt);
+ if (!ctx->psdec)
+ goto err_free_inst;
+
+ err = crypto_grab_aead(&ctx->spawn, aead_crypto_instance(inst),
+ crypto_attr_alg_name(tb[1]), 0, mask);
+ if (err)
+ goto err_free_inst;
+
+ alg = crypto_spawn_aead_alg(&ctx->spawn);
+ err = pcrypt_init_instance(aead_crypto_instance(inst), &alg->base);
+ if (err)
+ goto err_free_inst;
+
+ inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC;
+
+ inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
+ inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
+
+ inst->alg.base.cra_ctxsize = sizeof(struct pcrypt_aead_ctx);
+
+ inst->alg.init = pcrypt_aead_init_tfm;
+ inst->alg.exit = pcrypt_aead_exit_tfm;
+
+ inst->alg.setkey = pcrypt_aead_setkey;
+ inst->alg.setauthsize = pcrypt_aead_setauthsize;
+ inst->alg.encrypt = pcrypt_aead_encrypt;
+ inst->alg.decrypt = pcrypt_aead_decrypt;
+
+ inst->free = pcrypt_free;
+
+ err = aead_register_instance(tmpl, inst);
+ if (err) {
+err_free_inst:
+ pcrypt_free(inst);
+ }
+ return err;
+}
+
+static int pcrypt_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_AEAD:
+ return pcrypt_create_aead(tmpl, tb, algt);
+ }
+
+ return -EINVAL;
+}
+
+static int pcrypt_sysfs_add(struct padata_instance *pinst, const char *name)
+{
+ int ret;
+
+ pinst->kobj.kset = pcrypt_kset;
+ ret = kobject_add(&pinst->kobj, NULL, "%s", name);
+ if (!ret)
+ kobject_uevent(&pinst->kobj, KOBJ_ADD);
+
+ return ret;
+}
+
+static int pcrypt_init_padata(struct padata_instance **pinst, const char *name)
+{
+ int ret = -ENOMEM;
+
+ *pinst = padata_alloc(name);
+ if (!*pinst)
+ return ret;
+
+ ret = pcrypt_sysfs_add(*pinst, name);
+ if (ret)
+ padata_free(*pinst);
+
+ return ret;
+}
+
+static struct crypto_template pcrypt_tmpl = {
+ .name = "pcrypt",
+ .create = pcrypt_create,
+ .module = THIS_MODULE,
+};
+
+static int __init pcrypt_init(void)
+{
+ int err = -ENOMEM;
+
+ pcrypt_kset = kset_create_and_add("pcrypt", NULL, kernel_kobj);
+ if (!pcrypt_kset)
+ goto err;
+
+ err = pcrypt_init_padata(&pencrypt, "pencrypt");
+ if (err)
+ goto err_unreg_kset;
+
+ err = pcrypt_init_padata(&pdecrypt, "pdecrypt");
+ if (err)
+ goto err_deinit_pencrypt;
+
+ return crypto_register_template(&pcrypt_tmpl);
+
+err_deinit_pencrypt:
+ padata_free(pencrypt);
+err_unreg_kset:
+ kset_unregister(pcrypt_kset);
+err:
+ return err;
+}
+
+static void __exit pcrypt_exit(void)
+{
+ crypto_unregister_template(&pcrypt_tmpl);
+
+ padata_free(pencrypt);
+ padata_free(pdecrypt);
+
+ kset_unregister(pcrypt_kset);
+}
+
+subsys_initcall(pcrypt_init);
+module_exit(pcrypt_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
+MODULE_DESCRIPTION("Parallel crypto wrapper");
+MODULE_ALIAS_CRYPTO("pcrypt");