1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* Asymmetric public-key algorithm definitions 3 * 4 * See Documentation/crypto/asymmetric-keys.txt 5 * 6 * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved. 7 * Written by David Howells (dhowells@redhat.com) 8 */ 9 10 #ifndef _LINUX_PUBLIC_KEY_H 11 #define _LINUX_PUBLIC_KEY_H 12 13 #ifdef __UBOOT__ 14 #include <linux/types.h> 15 #else 16 #include <linux/keyctl.h> 17 #endif 18 #include <linux/oid_registry.h> 19 20 /* 21 * Cryptographic data for the public-key subtype of the asymmetric key type. 22 * 23 * Note that this may include private part of the key as well as the public 24 * part. 25 */ 26 struct public_key { 27 void *key; 28 u32 keylen; 29 enum OID algo; 30 void *params; 31 u32 paramlen; 32 bool key_is_private; 33 const char *id_type; 34 const char *pkey_algo; 35 }; 36 37 extern void public_key_free(struct public_key *key); 38 39 /* 40 * Public key cryptography signature data 41 */ 42 struct public_key_signature { 43 struct asymmetric_key_id *auth_ids[2]; 44 u8 *s; /* Signature */ 45 u32 s_size; /* Number of bytes in signature */ 46 u8 *digest; 47 u8 digest_size; /* Number of bytes in digest */ 48 const char *pkey_algo; 49 const char *hash_algo; 50 const char *encoding; 51 }; 52 53 extern void public_key_signature_free(struct public_key_signature *sig); 54 55 #ifndef __UBOOT__ 56 extern struct asymmetric_key_subtype public_key_subtype; 57 58 struct key; 59 struct key_type; 60 union key_payload; 61 62 extern int restrict_link_by_signature(struct key *dest_keyring, 63 const struct key_type *type, 64 const union key_payload *payload, 65 struct key *trust_keyring); 66 67 extern int restrict_link_by_key_or_keyring(struct key *dest_keyring, 68 const struct key_type *type, 69 const union key_payload *payload, 70 struct key *trusted); 71 72 extern int restrict_link_by_key_or_keyring_chain(struct key *trust_keyring, 73 const struct key_type *type, 74 const union key_payload *payload, 75 struct key *trusted); 76 77 extern int query_asymmetric_key(const struct kernel_pkey_params *, 78 struct kernel_pkey_query *); 79 80 extern int encrypt_blob(struct kernel_pkey_params *, const void *, void *); 81 extern int decrypt_blob(struct kernel_pkey_params *, const void *, void *); 82 extern int create_signature(struct kernel_pkey_params *, const void *, void *); 83 extern int verify_signature(const struct key *, 84 const struct public_key_signature *); 85 #endif /* __UBOOT__ */ 86 87 int public_key_verify_signature(const struct public_key *pkey, 88 const struct public_key_signature *sig); 89 90 #endif /* _LINUX_PUBLIC_KEY_H */ 91