1 /* 2 * Original code based on Host AP (software wireless LAN access point) driver 3 * for Intersil Prism2/2.5/3. 4 * 5 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen 6 * <jkmaline@cc.hut.fi> 7 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi> 8 * 9 * Adaption to a generic IEEE 802.11 stack by James Ketrenos 10 * <jketreno@linux.intel.com> 11 * 12 * Copyright (c) 2004, Intel Corporation 13 * 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 17 * more details. 18 */ 19 20 /* 21 * This file defines the interface to the ieee80211 crypto module. 22 */ 23 #ifndef IEEE80211_CRYPT_H 24 #define IEEE80211_CRYPT_H 25 26 #include <linux/skbuff.h> 27 28 struct ieee80211_crypto_ops { 29 const char *name; 30 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 */ 34 void * (*init)(int keyidx); 35 36 /* deinitialize crypto context and free allocated private data */ 37 void (*deinit)(void *priv); 38 39 /* encrypt/decrypt return < 0 on error or >= 0 on success. The return 40 * value from decrypt_mpdu is passed as the keyidx value for 41 * decrypt_msdu. skb must have enough head and tail room for the 42 * encryption; if not, error will be returned; these functions are 43 * called for all MPDUs (i.e., fragments). 44 */ 45 int (*encrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv); 46 int (*decrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv); 47 48 /* These functions are called for full MSDUs, i.e. full frames. 49 * These can be NULL if full MSDU operations are not needed. */ 50 int (*encrypt_msdu)(struct sk_buff *skb, int hdr_len, void *priv); 51 int (*decrypt_msdu)(struct sk_buff *skb, int keyidx, int hdr_len, 52 void *priv); 53 54 int (*set_key)(void *key, int len, u8 *seq, void *priv); 55 int (*get_key)(void *key, int len, u8 *seq, void *priv); 56 57 /* procfs handler for printing out key information and possible 58 * statistics */ 59 char * (*print_stats)(char *p, void *priv); 60 61 /* maximum number of bytes added by encryption; encrypt buf is 62 * allocated with extra_prefix_len bytes, copy of in_buf, and 63 * extra_postfix_len; encrypt need not use all this space, but 64 * the result must start at the beginning of the buffer and correct 65 * length must be returned */ 66 int extra_prefix_len, extra_postfix_len; 67 68 struct module *owner; 69 }; 70 71 struct ieee80211_crypt_data { 72 struct list_head list; /* delayed deletion list */ 73 struct ieee80211_crypto_ops *ops; 74 void *priv; 75 atomic_t refcnt; 76 }; 77 78 int ieee80211_register_crypto_ops(struct ieee80211_crypto_ops *ops); 79 int ieee80211_unregister_crypto_ops(struct ieee80211_crypto_ops *ops); 80 struct ieee80211_crypto_ops *ieee80211_get_crypto_ops(const char *name); 81 void ieee80211_crypt_deinit_entries(struct ieee80211_device *, int); 82 void ieee80211_crypt_deinit_handler(unsigned long); 83 void ieee80211_crypt_delayed_deinit(struct ieee80211_device *ieee, 84 struct ieee80211_crypt_data **crypt); 85 86 #endif 87