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