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 /* 18 * Cryptographic data for the public-key subtype of the asymmetric key type. 19 * 20 * Note that this may include private part of the key as well as the public 21 * part. 22 */ 23 struct public_key { 24 void *key; 25 u32 keylen; 26 const char *id_type; 27 const char *pkey_algo; 28 }; 29 30 extern void public_key_free(struct public_key *key); 31 32 /* 33 * Public key cryptography signature data 34 */ 35 struct public_key_signature { 36 struct asymmetric_key_id *auth_ids[2]; 37 u8 *s; /* Signature */ 38 u32 s_size; /* Number of bytes in signature */ 39 u8 *digest; 40 u8 digest_size; /* Number of bytes in digest */ 41 const char *pkey_algo; 42 const char *hash_algo; 43 }; 44 45 extern void public_key_signature_free(struct public_key_signature *sig); 46 47 extern struct asymmetric_key_subtype public_key_subtype; 48 49 struct key; 50 struct key_type; 51 union key_payload; 52 53 extern int restrict_link_by_signature(struct key *dest_keyring, 54 const struct key_type *type, 55 const union key_payload *payload, 56 struct key *trust_keyring); 57 58 extern int restrict_link_by_key_or_keyring(struct key *dest_keyring, 59 const struct key_type *type, 60 const union key_payload *payload, 61 struct key *trusted); 62 63 extern int restrict_link_by_key_or_keyring_chain(struct key *trust_keyring, 64 const struct key_type *type, 65 const union key_payload *payload, 66 struct key *trusted); 67 68 extern int verify_signature(const struct key *key, 69 const struct public_key_signature *sig); 70 71 int public_key_verify_signature(const struct public_key *pkey, 72 const struct public_key_signature *sig); 73 74 #endif /* _LINUX_PUBLIC_KEY_H */ 75