/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* Asymmetric public-key cryptography key subtype
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*
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* See Documentation/crypto/asymmetric-keys.rst
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*
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* Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*/
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#ifndef _KEYS_ASYMMETRIC_SUBTYPE_H
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#define _KEYS_ASYMMETRIC_SUBTYPE_H
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#include <linux/seq_file.h>
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#include <keys/asymmetric-type.h>
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struct kernel_pkey_query;
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struct kernel_pkey_params;
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struct public_key_signature;
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/*
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* Keys of this type declare a subtype that indicates the handlers and
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* capabilities.
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*/
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struct asymmetric_key_subtype {
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struct module *owner;
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const char *name;
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unsigned short name_len; /* length of name */
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/* Describe a key of this subtype for /proc/keys */
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void (*describe)(const struct key *key, struct seq_file *m);
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/* Destroy a key of this subtype */
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void (*destroy)(void *payload_crypto, void *payload_auth);
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int (*query)(const struct kernel_pkey_params *params,
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struct kernel_pkey_query *info);
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/* Encrypt/decrypt/sign data */
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int (*eds_op)(struct kernel_pkey_params *params,
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const void *in, void *out);
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/* Verify the signature on a key of this subtype (optional) */
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int (*verify_signature)(const struct key *key,
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const struct public_key_signature *sig);
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};
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/**
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* asymmetric_key_subtype - Get the subtype from an asymmetric key
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* @key: The key of interest.
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*
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* Retrieves and returns the subtype pointer of the asymmetric key from the
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* type-specific data attached to the key.
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*/
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static inline
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struct asymmetric_key_subtype *asymmetric_key_subtype(const struct key *key)
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{
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return key->payload.data[asym_subtype];
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}
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#endif /* _KEYS_ASYMMETRIC_SUBTYPE_H */
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