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113 lines
3.7 KiB
113 lines
3.7 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* SCTP kernel implementation |
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* (C) Copyright 2007 Hewlett-Packard Development Company, L.P. |
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* |
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* This file is part of the SCTP kernel implementation |
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* |
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* Please send any bug reports or fixes you make to the |
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* email address(es): |
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* lksctp developers <[email protected]> |
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* |
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* Written or modified by: |
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* Vlad Yasevich <[email protected]> |
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*/ |
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#ifndef __sctp_auth_h__ |
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#define __sctp_auth_h__ |
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#include <linux/list.h> |
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#include <linux/refcount.h> |
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struct sctp_endpoint; |
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struct sctp_association; |
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struct sctp_authkey; |
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struct sctp_hmacalgo; |
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struct crypto_shash; |
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/* |
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* Define a generic struct that will hold all the info |
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* necessary for an HMAC transform |
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*/ |
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struct sctp_hmac { |
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__u16 hmac_id; /* one of the above ids */ |
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char *hmac_name; /* name for loading */ |
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__u16 hmac_len; /* length of the signature */ |
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}; |
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/* This is generic structure that containst authentication bytes used |
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* as keying material. It's a what is referred to as byte-vector all |
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* over SCTP-AUTH |
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*/ |
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struct sctp_auth_bytes { |
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refcount_t refcnt; |
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__u32 len; |
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__u8 data[]; |
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}; |
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/* Definition for a shared key, weather endpoint or association */ |
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struct sctp_shared_key { |
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struct list_head key_list; |
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struct sctp_auth_bytes *key; |
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refcount_t refcnt; |
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__u16 key_id; |
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__u8 deactivated; |
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}; |
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#define key_for_each(__key, __list_head) \ |
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list_for_each_entry(__key, __list_head, key_list) |
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#define key_for_each_safe(__key, __tmp, __list_head) \ |
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list_for_each_entry_safe(__key, __tmp, __list_head, key_list) |
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static inline void sctp_auth_key_hold(struct sctp_auth_bytes *key) |
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{ |
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if (!key) |
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return; |
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refcount_inc(&key->refcnt); |
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} |
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void sctp_auth_key_put(struct sctp_auth_bytes *key); |
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struct sctp_shared_key *sctp_auth_shkey_create(__u16 key_id, gfp_t gfp); |
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void sctp_auth_destroy_keys(struct list_head *keys); |
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int sctp_auth_asoc_init_active_key(struct sctp_association *asoc, gfp_t gfp); |
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struct sctp_shared_key *sctp_auth_get_shkey( |
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const struct sctp_association *asoc, |
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__u16 key_id); |
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int sctp_auth_asoc_copy_shkeys(const struct sctp_endpoint *ep, |
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struct sctp_association *asoc, |
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gfp_t gfp); |
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int sctp_auth_init_hmacs(struct sctp_endpoint *ep, gfp_t gfp); |
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void sctp_auth_destroy_hmacs(struct crypto_shash *auth_hmacs[]); |
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struct sctp_hmac *sctp_auth_get_hmac(__u16 hmac_id); |
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struct sctp_hmac *sctp_auth_asoc_get_hmac(const struct sctp_association *asoc); |
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void sctp_auth_asoc_set_default_hmac(struct sctp_association *asoc, |
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struct sctp_hmac_algo_param *hmacs); |
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int sctp_auth_asoc_verify_hmac_id(const struct sctp_association *asoc, |
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__be16 hmac_id); |
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int sctp_auth_send_cid(enum sctp_cid chunk, |
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const struct sctp_association *asoc); |
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int sctp_auth_recv_cid(enum sctp_cid chunk, |
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const struct sctp_association *asoc); |
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void sctp_auth_calculate_hmac(const struct sctp_association *asoc, |
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struct sk_buff *skb, struct sctp_auth_chunk *auth, |
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struct sctp_shared_key *ep_key, gfp_t gfp); |
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void sctp_auth_shkey_release(struct sctp_shared_key *sh_key); |
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void sctp_auth_shkey_hold(struct sctp_shared_key *sh_key); |
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/* API Helpers */ |
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int sctp_auth_ep_add_chunkid(struct sctp_endpoint *ep, __u8 chunk_id); |
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int sctp_auth_ep_set_hmacs(struct sctp_endpoint *ep, |
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struct sctp_hmacalgo *hmacs); |
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int sctp_auth_set_key(struct sctp_endpoint *ep, struct sctp_association *asoc, |
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struct sctp_authkey *auth_key); |
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int sctp_auth_set_active_key(struct sctp_endpoint *ep, |
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struct sctp_association *asoc, __u16 key_id); |
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int sctp_auth_del_key_id(struct sctp_endpoint *ep, |
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struct sctp_association *asoc, __u16 key_id); |
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int sctp_auth_deact_key_id(struct sctp_endpoint *ep, |
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struct sctp_association *asoc, __u16 key_id); |
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int sctp_auth_init(struct sctp_endpoint *ep, gfp_t gfp); |
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void sctp_auth_free(struct sctp_endpoint *ep); |
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#endif
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