lib/keychain.h

   1 /* key-chain for authentication.
   2  * Copyright (C) 2000 Kunihiro Ishiguro
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published
   8  * by the Free Software Foundation; either version 2, or (at your
   9  * option) any later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef _ZEBRA_KEYCHAIN_H
  22 #define _ZEBRA_KEYCHAIN_H
  23
  24 #include "qobj.h"
  25
  26 #ifdef __cplusplus
  27 extern "C" {
  28 #endif
  29
  30 enum keychain_hash_algo {
  31         KEYCHAIN_ALGO_NULL,
  32         KEYCHAIN_ALGO_MD5,
  33         KEYCHAIN_ALGO_HMAC_SHA1,
  34         KEYCHAIN_ALGO_HMAC_SHA256,
  35         KEYCHAIN_ALGO_HMAC_SHA384,
  36         KEYCHAIN_ALGO_HMAC_SHA512,
  37         KEYCHAIN_ALGO_MAX
  38 };
  39
  40 #define KEYCHAIN_MD5_HASH_SIZE 16
  41 #define KEYCHAIN_HMAC_SHA1_HASH_SIZE 20
  42 #define KEYCHAIN_HMAC_SHA256_HASH_SIZE 32
  43 #define KEYCHAIN_HMAC_SHA384_HASH_SIZE 48
  44 #define KEYCHAIN_HMAC_SHA512_HASH_SIZE 64
  45 #define KEYCHAIN_MAX_HASH_SIZE 64
  46
  47 #define KEYCHAIN_ALGO_MD5_INTERNAL_BLK_SIZE 16
  48 #define KEYCHAIN_ALGO_SHA1_INTERNAL_BLK_SIZE 64
  49 #define KEYCHAIN_ALGO_SHA256_INTERNAL_BLK_SIZE 64
  50 #define KEYCHAIN_ALGO_SHA384_INTERNAL_BLK_SIZE 128
  51 #define KEYCHAIN_ALGO_SHA512_INTERNAL_BLK_SIZE 128
  52 #define KEYCHAIN_ALGO_MAX_INTERNAL_BLK_SIZE 128
  53
  54 struct keychain_algo_info {
  55         enum keychain_hash_algo key;
  56         const char *name;
  57         uint16_t length;
  58         uint16_t block;
  59         const char *desc;
  60 };
  61
  62 extern const struct keychain_algo_info algo_info[];
  63 uint16_t keychain_get_block_size(enum keychain_hash_algo key);
  64 uint16_t keychain_get_hash_len(enum keychain_hash_algo key);
  65 const char *keychain_get_description(enum keychain_hash_algo key);
  66 struct keychain_algo_info
  67 keychain_get_hash_algo_info(enum keychain_hash_algo key);
  68 enum keychain_hash_algo keychain_get_algo_id_by_name(const char *name);
  69 const char *keychain_get_algo_name_by_id(enum keychain_hash_algo key);
  70
  71 struct keychain {
  72         char *name;
  73
  74         struct list *key;
  75
  76         QOBJ_FIELDS;
  77 };
  78 DECLARE_QOBJ_TYPE(keychain);
  79
  80 struct key_range {
  81         time_t start;
  82         time_t end;
  83
  84         uint8_t duration;
  85 };
  86
  87 struct key {
  88         uint32_t index;
  89
  90         char *string;
  91         enum keychain_hash_algo hash_algo;
  92         struct key_range send;
  93         struct key_range accept;
  94
  95         QOBJ_FIELDS;
  96 };
  97 DECLARE_QOBJ_TYPE(key);
  98
  99 extern void keychain_init(void);
 100 extern struct keychain *keychain_lookup(const char *);
 101 extern struct key *key_lookup_for_accept(const struct keychain *, uint32_t);
 102 extern struct key *key_match_for_accept(const struct keychain *, const char *);
 103 extern struct key *key_lookup_for_send(const struct keychain *);
 104 const char *keychain_algo_str(enum keychain_hash_algo hash_algo);
 105 #ifdef __cplusplus
 106 }
 107 #endif
 108
 109 #endif /* _ZEBRA_KEYCHAIN_H */