| Vlad Yasevich | 1f48564 | 2007-10-09 01:15:59 -0700 | [diff] [blame] | 1 | /* SCTP kernel reference Implementation |
| 2 | * (C) Copyright 2007 Hewlett-Packard Development Company, L.P. |
| 3 | * |
| 4 | * This file is part of the SCTP kernel reference Implementation |
| 5 | * |
| 6 | * The SCTP reference implementation is free software; |
| 7 | * you can redistribute it and/or modify it under the terms of |
| 8 | * the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2, or (at your option) |
| 10 | * any later version. |
| 11 | * |
| 12 | * The SCTP reference implementation is distributed in the hope that it |
| 13 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
| 14 | * ************************ |
| 15 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 16 | * See the GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with GNU CC; see the file COPYING. If not, write to |
| 20 | * the Free Software Foundation, 59 Temple Place - Suite 330, |
| 21 | * Boston, MA 02111-1307, USA. |
| 22 | * |
| 23 | * Please send any bug reports or fixes you make to the |
| 24 | * email address(es): |
| 25 | * lksctp developers <lksctp-developers@lists.sourceforge.net> |
| 26 | * |
| 27 | * Or submit a bug report through the following website: |
| 28 | * http://www.sf.net/projects/lksctp |
| 29 | * |
| 30 | * Written or modified by: |
| 31 | * Vlad Yasevich <vladislav.yasevich@hp.com> |
| 32 | * |
| 33 | * Any bugs reported given to us we will try to fix... any fixes shared will |
| 34 | * be incorporated into the next SCTP release. |
| 35 | */ |
| 36 | |
| 37 | #ifndef __sctp_auth_h__ |
| 38 | #define __sctp_auth_h__ |
| 39 | |
| 40 | #include <linux/list.h> |
| 41 | #include <linux/crypto.h> |
| 42 | |
| 43 | struct sctp_endpoint; |
| 44 | struct sctp_association; |
| 45 | struct sctp_authkey; |
| Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 46 | struct sctp_hmacalgo; |
| Vlad Yasevich | 1f48564 | 2007-10-09 01:15:59 -0700 | [diff] [blame] | 47 | |
| 48 | /* |
| 49 | * Define a generic struct that will hold all the info |
| 50 | * necessary for an HMAC transform |
| 51 | */ |
| 52 | struct sctp_hmac { |
| 53 | __u16 hmac_id; /* one of the above ids */ |
| 54 | char *hmac_name; /* name for loading */ |
| 55 | __u16 hmac_len; /* length of the signature */ |
| 56 | }; |
| 57 | |
| 58 | /* This is generic structure that containst authentication bytes used |
| 59 | * as keying material. It's a what is referred to as byte-vector all |
| 60 | * over SCTP-AUTH |
| 61 | */ |
| 62 | struct sctp_auth_bytes { |
| 63 | atomic_t refcnt; |
| 64 | __u32 len; |
| 65 | __u8 data[]; |
| 66 | }; |
| 67 | |
| 68 | /* Definition for a shared key, weather endpoint or association */ |
| 69 | struct sctp_shared_key { |
| 70 | struct list_head key_list; |
| 71 | __u16 key_id; |
| 72 | struct sctp_auth_bytes *key; |
| 73 | }; |
| 74 | |
| 75 | #define key_for_each(__key, __list_head) \ |
| 76 | list_for_each_entry(__key, __list_head, key_list) |
| 77 | |
| 78 | #define key_for_each_safe(__key, __tmp, __list_head) \ |
| 79 | list_for_each_entry_safe(__key, __tmp, __list_head, key_list) |
| 80 | |
| 81 | static inline void sctp_auth_key_hold(struct sctp_auth_bytes *key) |
| 82 | { |
| 83 | if (!key) |
| 84 | return; |
| 85 | |
| 86 | atomic_inc(&key->refcnt); |
| 87 | } |
| 88 | |
| 89 | void sctp_auth_key_put(struct sctp_auth_bytes *key); |
| 90 | struct sctp_shared_key *sctp_auth_shkey_create(__u16 key_id, gfp_t gfp); |
| Vlad Yasevich | 1f48564 | 2007-10-09 01:15:59 -0700 | [diff] [blame] | 91 | void sctp_auth_destroy_keys(struct list_head *keys); |
| 92 | int sctp_auth_asoc_init_active_key(struct sctp_association *asoc, gfp_t gfp); |
| 93 | struct sctp_shared_key *sctp_auth_get_shkey( |
| 94 | const struct sctp_association *asoc, |
| 95 | __u16 key_id); |
| 96 | int sctp_auth_asoc_copy_shkeys(const struct sctp_endpoint *ep, |
| 97 | struct sctp_association *asoc, |
| 98 | gfp_t gfp); |
| 99 | int sctp_auth_init_hmacs(struct sctp_endpoint *ep, gfp_t gfp); |
| 100 | void sctp_auth_destroy_hmacs(struct crypto_hash *auth_hmacs[]); |
| 101 | struct sctp_hmac *sctp_auth_get_hmac(__u16 hmac_id); |
| 102 | struct sctp_hmac *sctp_auth_asoc_get_hmac(const struct sctp_association *asoc); |
| 103 | void sctp_auth_asoc_set_default_hmac(struct sctp_association *asoc, |
| 104 | struct sctp_hmac_algo_param *hmacs); |
| 105 | int sctp_auth_asoc_verify_hmac_id(const struct sctp_association *asoc, |
| Al Viro | d06f608 | 2007-10-29 05:03:23 +0000 | [diff] [blame] | 106 | __be16 hmac_id); |
| Vlad Yasevich | 1f48564 | 2007-10-09 01:15:59 -0700 | [diff] [blame] | 107 | int sctp_auth_send_cid(sctp_cid_t chunk, const struct sctp_association *asoc); |
| 108 | int sctp_auth_recv_cid(sctp_cid_t chunk, const struct sctp_association *asoc); |
| 109 | void sctp_auth_calculate_hmac(const struct sctp_association *asoc, |
| 110 | struct sk_buff *skb, |
| 111 | struct sctp_auth_chunk *auth, gfp_t gfp); |
| Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 112 | |
| 113 | /* API Helpers */ |
| 114 | int sctp_auth_ep_add_chunkid(struct sctp_endpoint *ep, __u8 chunk_id); |
| 115 | int sctp_auth_ep_set_hmacs(struct sctp_endpoint *ep, |
| 116 | struct sctp_hmacalgo *hmacs); |
| 117 | int sctp_auth_set_key(struct sctp_endpoint *ep, |
| 118 | struct sctp_association *asoc, |
| 119 | struct sctp_authkey *auth_key); |
| 120 | int sctp_auth_set_active_key(struct sctp_endpoint *ep, |
| 121 | struct sctp_association *asoc, |
| 122 | __u16 key_id); |
| 123 | int sctp_auth_del_key_id(struct sctp_endpoint *ep, |
| 124 | struct sctp_association *asoc, |
| 125 | __u16 key_id); |
| 126 | |
| Vlad Yasevich | 1f48564 | 2007-10-09 01:15:59 -0700 | [diff] [blame] | 127 | #endif |