1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */ 2*4882a593Smuzhiyun /* Asymmetric public-key algorithm definitions 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * See Documentation/crypto/asymmetric-keys.rst 5*4882a593Smuzhiyun * 6*4882a593Smuzhiyun * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved. 7*4882a593Smuzhiyun * Written by David Howells (dhowells@redhat.com) 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #ifndef _LINUX_PUBLIC_KEY_H 11*4882a593Smuzhiyun #define _LINUX_PUBLIC_KEY_H 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #include <linux/keyctl.h> 14*4882a593Smuzhiyun #include <linux/oid_registry.h> 15*4882a593Smuzhiyun #include <crypto/akcipher.h> 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun /* 18*4882a593Smuzhiyun * Cryptographic data for the public-key subtype of the asymmetric key type. 19*4882a593Smuzhiyun * 20*4882a593Smuzhiyun * Note that this may include private part of the key as well as the public 21*4882a593Smuzhiyun * part. 22*4882a593Smuzhiyun */ 23*4882a593Smuzhiyun struct public_key { 24*4882a593Smuzhiyun void *key; 25*4882a593Smuzhiyun u32 keylen; 26*4882a593Smuzhiyun enum OID algo; 27*4882a593Smuzhiyun void *params; 28*4882a593Smuzhiyun u32 paramlen; 29*4882a593Smuzhiyun bool key_is_private; 30*4882a593Smuzhiyun const char *id_type; 31*4882a593Smuzhiyun const char *pkey_algo; 32*4882a593Smuzhiyun }; 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun extern void public_key_free(struct public_key *key); 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun /* 37*4882a593Smuzhiyun * Public key cryptography signature data 38*4882a593Smuzhiyun */ 39*4882a593Smuzhiyun struct public_key_signature { 40*4882a593Smuzhiyun struct asymmetric_key_id *auth_ids[2]; 41*4882a593Smuzhiyun u8 *s; /* Signature */ 42*4882a593Smuzhiyun u32 s_size; /* Number of bytes in signature */ 43*4882a593Smuzhiyun u8 *digest; 44*4882a593Smuzhiyun u8 digest_size; /* Number of bytes in digest */ 45*4882a593Smuzhiyun const char *pkey_algo; 46*4882a593Smuzhiyun const char *hash_algo; 47*4882a593Smuzhiyun const char *encoding; 48*4882a593Smuzhiyun const void *data; 49*4882a593Smuzhiyun unsigned int data_size; 50*4882a593Smuzhiyun }; 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun extern void public_key_signature_free(struct public_key_signature *sig); 53*4882a593Smuzhiyun 54*4882a593Smuzhiyun extern struct asymmetric_key_subtype public_key_subtype; 55*4882a593Smuzhiyun 56*4882a593Smuzhiyun struct key; 57*4882a593Smuzhiyun struct key_type; 58*4882a593Smuzhiyun union key_payload; 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun extern int restrict_link_by_signature(struct key *dest_keyring, 61*4882a593Smuzhiyun const struct key_type *type, 62*4882a593Smuzhiyun const union key_payload *payload, 63*4882a593Smuzhiyun struct key *trust_keyring); 64*4882a593Smuzhiyun 65*4882a593Smuzhiyun extern int restrict_link_by_key_or_keyring(struct key *dest_keyring, 66*4882a593Smuzhiyun const struct key_type *type, 67*4882a593Smuzhiyun const union key_payload *payload, 68*4882a593Smuzhiyun struct key *trusted); 69*4882a593Smuzhiyun 70*4882a593Smuzhiyun extern int restrict_link_by_key_or_keyring_chain(struct key *trust_keyring, 71*4882a593Smuzhiyun const struct key_type *type, 72*4882a593Smuzhiyun const union key_payload *payload, 73*4882a593Smuzhiyun struct key *trusted); 74*4882a593Smuzhiyun 75*4882a593Smuzhiyun extern int query_asymmetric_key(const struct kernel_pkey_params *, 76*4882a593Smuzhiyun struct kernel_pkey_query *); 77*4882a593Smuzhiyun 78*4882a593Smuzhiyun extern int encrypt_blob(struct kernel_pkey_params *, const void *, void *); 79*4882a593Smuzhiyun extern int decrypt_blob(struct kernel_pkey_params *, const void *, void *); 80*4882a593Smuzhiyun extern int create_signature(struct kernel_pkey_params *, const void *, void *); 81*4882a593Smuzhiyun extern int verify_signature(const struct key *, 82*4882a593Smuzhiyun const struct public_key_signature *); 83*4882a593Smuzhiyun 84*4882a593Smuzhiyun int public_key_verify_signature(const struct public_key *pkey, 85*4882a593Smuzhiyun const struct public_key_signature *sig); 86*4882a593Smuzhiyun 87*4882a593Smuzhiyun #endif /* _LINUX_PUBLIC_KEY_H */ 88