1 /* Asymmetric public-key cryptography key subtype 2 * 3 * See Documentation/security/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 _KEYS_ASYMMETRIC_SUBTYPE_H 15 #define _KEYS_ASYMMETRIC_SUBTYPE_H 16 17 #include <linux/seq_file.h> 18 #include <keys/asymmetric-type.h> 19 20 struct public_key_signature; 21 22 /* 23 * Keys of this type declare a subtype that indicates the handlers and 24 * capabilities. 25 */ 26 struct asymmetric_key_subtype { 27 struct module *owner; 28 const char *name; 29 unsigned short name_len; /* length of name */ 30 31 /* Describe a key of this subtype for /proc/keys */ 32 void (*describe)(const struct key *key, struct seq_file *m); 33 34 /* Destroy a key of this subtype */ 35 void (*destroy)(void *payload_crypto, void *payload_auth); 36 37 /* Verify the signature on a key of this subtype (optional) */ 38 int (*verify_signature)(const struct key *key, 39 const struct public_key_signature *sig); 40 }; 41 42 /** 43 * asymmetric_key_subtype - Get the subtype from an asymmetric key 44 * @key: The key of interest. 45 * 46 * Retrieves and returns the subtype pointer of the asymmetric key from the 47 * type-specific data attached to the key. 48 */ 49 static inline 50 struct asymmetric_key_subtype *asymmetric_key_subtype(const struct key *key) 51 { 52 return key->payload.data[asym_subtype]; 53 } 54 55 #endif /* _KEYS_ASYMMETRIC_SUBTYPE_H */ 56