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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* Asymmetric public-key cryptography key subtype
 *
 * See Documentation/crypto/asymmetric-keys.rst
 *
 * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 */

#ifndef _KEYS_ASYMMETRIC_SUBTYPE_H
#define _KEYS_ASYMMETRIC_SUBTYPE_H

#include <linux/seq_file.h>
#include <keys/asymmetric-type.h>

struct kernel_pkey_query;
struct kernel_pkey_params;
struct public_key_signature;

/*
 * Keys of this type declare a subtype that indicates the handlers and
 * capabilities.
 */
struct asymmetric_key_subtype {
	struct module		*owner;
	const char		*name;
	unsigned short		name_len;	/* length of name */

	/* Describe a key of this subtype for /proc/keys */
	void (*describe)(const struct key *key, struct seq_file *m);

	/* Destroy a key of this subtype */
	void (*destroy)(void *payload_crypto, void *payload_auth);

	int (*query)(const struct kernel_pkey_params *params,
		     struct kernel_pkey_query *info);

	/* Encrypt/decrypt/sign data */
	int (*eds_op)(struct kernel_pkey_params *params,
		      const void *in, void *out);

	/* Verify the signature on a key of this subtype (optional) */
	int (*verify_signature)(const struct key *key,
				const struct public_key_signature *sig);
};

/**
 * asymmetric_key_subtype - Get the subtype from an asymme