2 * Original code based on Host AP (software wireless LAN access point) driver
3 * for Intersil Prism2/2.5/3.
5 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
7 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
9 * Adaption to a generic IEEE 802.11 stack by James Ketrenos
10 * <jketreno@linux.intel.com>
12 * Copyright (c) 2004, Intel Corporation
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation. See README and COPYING for
21 * This file defines the interface to the ieee80211 crypto module.
23 #ifndef IEEE80211_CRYPT_H
24 #define IEEE80211_CRYPT_H
26 #include <linux/skbuff.h>
28 struct ieee80211_crypto_ops {
31 /* init new crypto context (e.g., allocate private data space,
32 * select IV, etc.); returns NULL on failure or pointer to allocated
33 * private data on success
35 void * (*init)(int keyidx);
37 /* deinitialize crypto context and free allocated private data */
38 void (*deinit)(void *priv);
40 /* encrypt/decrypt return < 0 on error or >= 0 on success. The return
41 * value from decrypt_mpdu is passed as the keyidx value for
42 * decrypt_msdu. skb must have enough head and tail room for the
43 * encryption; if not, error will be returned; these functions are
44 * called for all MPDUs (i.e., fragments).
46 int (*encrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv);
47 int (*decrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv);
49 /* These functions are called for full MSDUs, i.e. full frames.
50 * These can be NULL if full MSDU operations are not needed.
52 int (*encrypt_msdu)(struct sk_buff *skb, int hdr_len, void *priv);
53 int (*decrypt_msdu)(struct sk_buff *skb, int keyidx, int hdr_len,
56 int (*set_key)(void *key, int len, u8 *seq, void *priv);
57 int (*get_key)(void *key, int len, u8 *seq, void *priv);
59 /* procfs handler for printing out key information and possible
62 char * (*print_stats)(char *p, void *priv);
64 /* maximum number of bytes added by encryption; encrypt buf is
65 * allocated with extra_prefix_len bytes, copy of in_buf, and
66 * extra_postfix_len; encrypt need not use all this space, but
67 * the result must start at the beginning of the buffer and correct
68 * length must be returned
70 int extra_prefix_len, extra_postfix_len;
75 struct ieee80211_crypt_data {
76 struct list_head list; /* delayed deletion list */
77 struct ieee80211_crypto_ops *ops;
82 int ieee80211_register_crypto_ops(struct ieee80211_crypto_ops *ops);
83 int ieee80211_unregister_crypto_ops(struct ieee80211_crypto_ops *ops);
84 struct ieee80211_crypto_ops *ieee80211_get_crypto_ops(const char *name);
85 void ieee80211_crypt_deinit_entries(struct ieee80211_device *ieee, int force);
86 void ieee80211_crypt_deinit_handler(unsigned long data);
87 void ieee80211_crypt_delayed_deinit(struct ieee80211_device *ieee,
88 struct ieee80211_crypt_data **crypt);