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5a30771832
Provide the missing asymmetric key subops for new key type ops. This include query, encrypt, decrypt and create signature. Verify signature already exists. Also provided are accessor functions for this: int query_asymmetric_key(const struct key *key, struct kernel_pkey_query *info); int encrypt_blob(struct kernel_pkey_params *params, const void *data, void *enc); int decrypt_blob(struct kernel_pkey_params *params, const void *enc, void *data); int create_signature(struct kernel_pkey_params *params, const void *data, void *enc); The public_key_signature struct gains an encoding field to carry the encoding for verify_signature(). Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Marcel Holtmann <marcel@holtmann.org> Reviewed-by: Marcel Holtmann <marcel@holtmann.org> Reviewed-by: Denis Kenzior <denkenz@gmail.com> Tested-by: Denis Kenzior <denkenz@gmail.com> Signed-off-by: James Morris <james.morris@microsoft.com>
65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
/* Asymmetric public-key cryptography key subtype
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*
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* See Documentation/crypto/asymmetric-keys.txt
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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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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