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 #if CONFIG_IS_ENABLED(MBEDTLS_LIB_X509) 16 #include <library/common.h> 17 #include <mbedtls/pk.h> 18 #include <mbedtls/x509_crt.h> 19 #include <mbedtls/md.h> 20 #endif 21 #else 22 #include <linux/keyctl.h> 23 #endif 24 #include <linux/oid_registry.h> 25 26 /* 27 * Cryptographic data for the public-key subtype of the asymmetric key type. 28 * 29 * Note that this may include private part of the key as well as the public 30 * part. 31 */ 32 struct public_key { 33 void *key; 34 u32 keylen; 35 enum OID algo; 36 void *params; 37 u32 paramlen; 38 bool key_is_private; 39 const char *id_type; 40 const char *pkey_algo; 41 }; 42 43 extern void public_key_free(struct public_key *key); 44 45 /* 46 * Public key cryptography signature data 47 */ 48 struct public_key_signature { 49 struct asymmetric_key_id *auth_ids[2]; 50 u8 *s; /* Signature */ 51 u32 s_size; /* Number of bytes in signature */ 52 u8 *digest; 53 u8 digest_size; /* Number of bytes in digest */ 54 const char *pkey_algo; 55 const char *hash_algo; 56 const char *encoding; 57 }; 58 59 extern void public_key_signature_free(struct public_key_signature *sig); 60 61 #ifndef __UBOOT__ 62 extern struct asymmetric_key_subtype public_key_subtype; 63 64 struct key; 65 struct key_type; 66 union key_payload; 67 68 extern int restrict_link_by_signature(struct key *dest_keyring, 69 const struct key_type *type, 70 const union key_payload *payload, 71 struct key *trust_keyring); 72 73 extern int restrict_link_by_key_or_keyring(struct key *dest_keyring, 74 const struct key_type *type, 75 const union key_payload *payload, 76 struct key *trusted); 77 78 extern int restrict_link_by_key_or_keyring_chain(struct key *trust_keyring, 79 const struct key_type *type, 80 const union key_payload *payload, 81 struct key *trusted); 82 83 extern int query_asymmetric_key(const struct kernel_pkey_params *, 84 struct kernel_pkey_query *); 85 86 extern int encrypt_blob(struct kernel_pkey_params *, const void *, void *); 87 extern int decrypt_blob(struct kernel_pkey_params *, const void *, void *); 88 extern int create_signature(struct kernel_pkey_params *, const void *, void *); 89 extern int verify_signature(const struct key *, 90 const struct public_key_signature *); 91 #endif /* __UBOOT__ */ 92 93 int public_key_verify_signature(const struct public_key *pkey, 94 const struct public_key_signature *sig); 95 96 #endif /* _LINUX_PUBLIC_KEY_H */ 97