crypto/kpp.c

Source file repositories/reference/linux-study-clean/crypto/kpp.c

File Facts

System
Linux kernel
Corpus path
crypto/kpp.c
Extension
.c
Size
3382 bytes
Lines
141
Domain
Kernel Services
Bucket
crypto
Inferred role
Kernel Services: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.

Dependency Surface

Detected Declarations

Annotated Snippet

// 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 <crypto/internal/kpp.h>
#include <linux/cryptouser.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/seq_file.h>
#include <linux/string.h>
#include <net/netlink.h>

#include "internal.h"

static int __maybe_unused crypto_kpp_report(
	struct sk_buff *skb, struct crypto_alg *alg)
{
	struct crypto_report_kpp rkpp = {
		.type = "kpp",
	};

	return nla_put(skb, CRYPTOCFGA_REPORT_KPP, sizeof(rkpp), &rkpp);
}

static void __maybe_unused 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
#if IS_ENABLED(CONFIG_CRYPTO_USER)
	.report = crypto_kpp_report,
#endif
	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
	.maskset = CRYPTO_ALG_TYPE_MASK,
	.type = CRYPTO_ALG_TYPE_KPP,
	.tfmsize = offsetof(struct crypto_kpp, base),
	.algsize = offsetof(struct kpp_alg, 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)

Annotation

Implementation Notes