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/* SPDX-License-Identifier: GPL-2.0-or-later */ /* Asymmetric public-key algorithm definitions * * See Documentation/crypto/asymmetric-keys.rst * * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved. * Written by David Howells ([email protected]) */ #ifndef _LINUX_PUBLIC_KEY_H #define _LINUX_PUBLIC_KEY_H #include <linux/keyctl.h> #include <linux/oid_registry.h> /* * Cryptographic data for the public-key subtype of the asymmetric key type. * * Note that this may include private part of the key as well as the public * part. */ struct public_key { void *key; u32 keylen; enum OID algo; void *params; u32 paramlen; bool key_is_private; const char *id_type; const char *pkey_algo; }; extern void public_key_free(struct public_key *key); /* * Public key cryptography signature data */ struct public_key_signature { struct asymmetric_key_id *auth_ids[2]; u8 *s; /* Signature */ u8 *digest; u32 s_size; /* Number of bytes in signature */ u32 digest_size; /* Number of bytes in digest */ const char *pkey_algo; const char *hash_algo; const char *encoding; const void *data; unsigned int data_size; }; extern void public_key_signature_free(struct public_key_signature *sig); extern struct asymmetric_key_subtype public_key_subtype; struct key; struct key_type; union key_payload; extern int restrict_link_by_signature(struct key *dest_keyring, const struct key_type *type, const union key_payload *payload, struct key *trust_keyring); extern int restrict_link_by_key_or_keyring(struct key *dest_keyring, const struct key_type *type, const union key_payload *payload, struct key *trusted); extern int restrict_link_by_key_or_keyring_chain(struct key *trust_keyring, const struct key_type *type, const union key_payload *payload, struct key *trusted); extern int query_asymmetric_key(const struct kernel_pkey_params *, struct kernel_pkey_query *); extern int encrypt_blob(struct kernel_pkey_params *, const void *, void *); extern int decrypt_blob(struct kernel_pkey_params *, const void *, void *); extern int create_signature(struct kernel_pkey_params *, const void *, void *); extern int verify_signature(const struct key *, const struct public_key_signature *); int public_key_verify_signature(const struct public_key *pkey, const struct public_key_signature *sig); #endif /* _LINUX_PUBLIC_KEY_H */