mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 21:33:00 +00:00
9e2f284e14
Add helper function to determine if a given key-agreement protocol primitive is supported. Signed-off-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
151 lines
3.6 KiB
C
151 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Key-agreement Protocol Primitives (KPP)
|
|
*
|
|
* Copyright (c) 2016, Intel Corporation
|
|
* Authors: Salvatore Benedetto <salvatore.benedetto@intel.com>
|
|
*/
|
|
#include <linux/errno.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/string.h>
|
|
#include <linux/crypto.h>
|
|
#include <crypto/algapi.h>
|
|
#include <linux/cryptouser.h>
|
|
#include <linux/compiler.h>
|
|
#include <net/netlink.h>
|
|
#include <crypto/kpp.h>
|
|
#include <crypto/internal/kpp.h>
|
|
#include "internal.h"
|
|
|
|
#ifdef CONFIG_NET
|
|
static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
|
|
{
|
|
struct crypto_report_kpp rkpp;
|
|
|
|
memset(&rkpp, 0, sizeof(rkpp));
|
|
|
|
strscpy(rkpp.type, "kpp", sizeof(rkpp.type));
|
|
|
|
return nla_put(skb, CRYPTOCFGA_REPORT_KPP, sizeof(rkpp), &rkpp);
|
|
}
|
|
#else
|
|
static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
#endif
|
|
|
|
static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
|
|
__maybe_unused;
|
|
|
|
static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
|
|
{
|
|
seq_puts(m, "type : kpp\n");
|
|
}
|
|
|
|
static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm)
|
|
{
|
|
struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
|
|
struct kpp_alg *alg = crypto_kpp_alg(kpp);
|
|
|
|
alg->exit(kpp);
|
|
}
|
|
|
|
static int crypto_kpp_init_tfm(struct crypto_tfm *tfm)
|
|
{
|
|
struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
|
|
struct kpp_alg *alg = crypto_kpp_alg(kpp);
|
|
|
|
if (alg->exit)
|
|
kpp->base.exit = crypto_kpp_exit_tfm;
|
|
|
|
if (alg->init)
|
|
return alg->init(kpp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void crypto_kpp_free_instance(struct crypto_instance *inst)
|
|
{
|
|
struct kpp_instance *kpp = kpp_instance(inst);
|
|
|
|
kpp->free(kpp);
|
|
}
|
|
|
|
static const struct crypto_type crypto_kpp_type = {
|
|
.extsize = crypto_alg_extsize,
|
|
.init_tfm = crypto_kpp_init_tfm,
|
|
.free = crypto_kpp_free_instance,
|
|
#ifdef CONFIG_PROC_FS
|
|
.show = crypto_kpp_show,
|
|
#endif
|
|
.report = crypto_kpp_report,
|
|
.maskclear = ~CRYPTO_ALG_TYPE_MASK,
|
|
.maskset = CRYPTO_ALG_TYPE_MASK,
|
|
.type = CRYPTO_ALG_TYPE_KPP,
|
|
.tfmsize = offsetof(struct crypto_kpp, base),
|
|
};
|
|
|
|
struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask)
|
|
{
|
|
return crypto_alloc_tfm(alg_name, &crypto_kpp_type, type, mask);
|
|
}
|
|
EXPORT_SYMBOL_GPL(crypto_alloc_kpp);
|
|
|
|
int crypto_grab_kpp(struct crypto_kpp_spawn *spawn,
|
|
struct crypto_instance *inst,
|
|
const char *name, u32 type, u32 mask)
|
|
{
|
|
spawn->base.frontend = &crypto_kpp_type;
|
|
return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
|
|
}
|
|
EXPORT_SYMBOL_GPL(crypto_grab_kpp);
|
|
|
|
int crypto_has_kpp(const char *alg_name, u32 type, u32 mask)
|
|
{
|
|
return crypto_type_has_alg(alg_name, &crypto_kpp_type, type, mask);
|
|
}
|
|
EXPORT_SYMBOL_GPL(crypto_has_kpp);
|
|
|
|
static void kpp_prepare_alg(struct kpp_alg *alg)
|
|
{
|
|
struct crypto_alg *base = &alg->base;
|
|
|
|
base->cra_type = &crypto_kpp_type;
|
|
base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
|
|
base->cra_flags |= CRYPTO_ALG_TYPE_KPP;
|
|
}
|
|
|
|
int crypto_register_kpp(struct kpp_alg *alg)
|
|
{
|
|
struct crypto_alg *base = &alg->base;
|
|
|
|
kpp_prepare_alg(alg);
|
|
return crypto_register_alg(base);
|
|
}
|
|
EXPORT_SYMBOL_GPL(crypto_register_kpp);
|
|
|
|
void crypto_unregister_kpp(struct kpp_alg *alg)
|
|
{
|
|
crypto_unregister_alg(&alg->base);
|
|
}
|
|
EXPORT_SYMBOL_GPL(crypto_unregister_kpp);
|
|
|
|
int kpp_register_instance(struct crypto_template *tmpl,
|
|
struct kpp_instance *inst)
|
|
{
|
|
if (WARN_ON(!inst->free))
|
|
return -EINVAL;
|
|
|
|
kpp_prepare_alg(&inst->alg);
|
|
|
|
return crypto_register_instance(tmpl, kpp_crypto_instance(inst));
|
|
}
|
|
EXPORT_SYMBOL_GPL(kpp_register_instance);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("Key-agreement Protocol Primitives");
|