projects / deliverable / linux.git / blame
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|---|---|---|
| 60c778b2 | 1 | /* SCTP kernel implementation |
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2 | * (C) Copyright 2007 Hewlett-Packard Development Company, L.P. |
| 3 | * | |
| 60c778b2 | 4 | * This file is part of the SCTP kernel implementation |
| 1f485649 | 5 | * |
| 60c778b2 | 6 | * This SCTP implementation is free software; |
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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 | * | |
| 60c778b2 | 12 | * This SCTP implementation is distributed in the hope that it |
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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; | |
| 65b07e5d | 46 | struct sctp_hmacalgo; |
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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); | |
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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, | |
| d06f6082 | 106 | __be16 hmac_id); |
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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); | |
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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 | ||
| 1f485649 | 127 | #endif |