1 /* Asymmetric public-key algorithm definitions 2 * 3 * See Documentation/crypto/asymmetric-keys.txt 4 * 5 * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved. 6 * Written by David Howells (dhowells@redhat.com) 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public Licence 10 * as published by the Free Software Foundation; either version 11 * 2 of the Licence, or (at your option) any later version. 12 */ 13 14 #ifndef _LINUX_PUBLIC_KEY_H 15 #define _LINUX_PUBLIC_KEY_H 16 17 #include <linux/keyctl.h> 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 extern struct asymmetric_key_subtype public_key_subtype; 56 57 struct key; 58 struct key_type; 59 union key_payload; 60 61 extern int restrict_link_by_signature(struct key *dest_keyring, 62 const struct key_type *type, 63 const union key_payload *payload, 64 struct key *trust_keyring); 65 66 extern int restrict_link_by_key_or_keyring(struct key *dest_keyring, 67 const struct key_type *type, 68 const union key_payload *payload, 69 struct key *trusted); 70 71 extern int restrict_link_by_key_or_keyring_chain(struct key *trust_keyring, 72 const struct key_type *type, 73 const union key_payload *payload, 74 struct key *trusted); 75 76 extern int query_asymmetric_key(const struct kernel_pkey_params *, 77 struct kernel_pkey_query *); 78 79 extern int encrypt_blob(struct kernel_pkey_params *, const void *, void *); 80 extern int decrypt_blob(struct kernel_pkey_params *, const void *, void *); 81 extern int create_signature(struct kernel_pkey_params *, const void *, void *); 82 extern int verify_signature(const struct key *, 83 const struct public_key_signature *); 84 85 int public_key_verify_signature(const struct public_key *pkey, 86 const struct public_key_signature *sig); 87 88 #endif /* _LINUX_PUBLIC_KEY_H */ 89