2 * Host AP crypto routines
4 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
5 * Portions Copyright (C) 2004, Intel Corporation <jketreno@linux.intel.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation. See README and COPYING for
14 //#include <linux/config.h>
15 #include <linux/version.h>
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/slab.h>
19 #include <asm/string.h>
20 #include <asm/errno.h>
22 #if (LINUX_VERSION_CODE<KERNEL_VERSION(2,6,18))
23 #include<linux/config.h>
26 #include "ieee80211.h"
28 MODULE_AUTHOR("Jouni Malinen");
29 MODULE_DESCRIPTION("HostAP crypto");
30 MODULE_LICENSE("GPL");
32 struct ieee80211_crypto_alg
{
33 struct list_head list
;
34 struct ieee80211_crypto_ops
*ops
;
38 struct ieee80211_crypto
{
39 struct list_head algs
;
43 static struct ieee80211_crypto
*hcrypt
;
45 void ieee80211_crypt_deinit_entries(struct ieee80211_device
*ieee
,
48 struct list_head
*ptr
, *n
;
49 struct ieee80211_crypt_data
*entry
;
51 for (ptr
= ieee
->crypt_deinit_list
.next
, n
= ptr
->next
;
52 ptr
!= &ieee
->crypt_deinit_list
; ptr
= n
, n
= ptr
->next
) {
53 entry
= list_entry(ptr
, struct ieee80211_crypt_data
, list
);
55 if (atomic_read(&entry
->refcnt
) != 0 && !force
)
61 entry
->ops
->deinit(entry
->priv
);
62 module_put(entry
->ops
->owner
);
68 void ieee80211_crypt_deinit_handler(unsigned long data
)
70 struct ieee80211_device
*ieee
= (struct ieee80211_device
*)data
;
73 spin_lock_irqsave(&ieee
->lock
, flags
);
74 ieee80211_crypt_deinit_entries(ieee
, 0);
75 if (!list_empty(&ieee
->crypt_deinit_list
)) {
76 printk(KERN_DEBUG
"%s: entries remaining in delayed crypt "
77 "deletion list\n", ieee
->dev
->name
);
78 ieee
->crypt_deinit_timer
.expires
= jiffies
+ HZ
;
79 add_timer(&ieee
->crypt_deinit_timer
);
81 spin_unlock_irqrestore(&ieee
->lock
, flags
);
85 void ieee80211_crypt_delayed_deinit(struct ieee80211_device
*ieee
,
86 struct ieee80211_crypt_data
**crypt
)
88 struct ieee80211_crypt_data
*tmp
;
97 /* must not run ops->deinit() while there may be pending encrypt or
98 * decrypt operations. Use a list of delayed deinits to avoid needing
101 spin_lock_irqsave(&ieee
->lock
, flags
);
102 list_add(&tmp
->list
, &ieee
->crypt_deinit_list
);
103 if (!timer_pending(&ieee
->crypt_deinit_timer
)) {
104 ieee
->crypt_deinit_timer
.expires
= jiffies
+ HZ
;
105 add_timer(&ieee
->crypt_deinit_timer
);
107 spin_unlock_irqrestore(&ieee
->lock
, flags
);
110 int ieee80211_register_crypto_ops(struct ieee80211_crypto_ops
*ops
)
113 struct ieee80211_crypto_alg
*alg
;
118 alg
= kmalloc(sizeof(*alg
), GFP_KERNEL
);
122 memset(alg
, 0, sizeof(*alg
));
125 spin_lock_irqsave(&hcrypt
->lock
, flags
);
126 list_add(&alg
->list
, &hcrypt
->algs
);
127 spin_unlock_irqrestore(&hcrypt
->lock
, flags
);
129 printk(KERN_DEBUG
"ieee80211_crypt: registered algorithm '%s'\n",
135 int ieee80211_unregister_crypto_ops(struct ieee80211_crypto_ops
*ops
)
138 struct list_head
*ptr
;
139 struct ieee80211_crypto_alg
*del_alg
= NULL
;
144 spin_lock_irqsave(&hcrypt
->lock
, flags
);
145 for (ptr
= hcrypt
->algs
.next
; ptr
!= &hcrypt
->algs
; ptr
= ptr
->next
) {
146 struct ieee80211_crypto_alg
*alg
=
147 (struct ieee80211_crypto_alg
*) ptr
;
148 if (alg
->ops
== ops
) {
149 list_del(&alg
->list
);
154 spin_unlock_irqrestore(&hcrypt
->lock
, flags
);
157 printk(KERN_DEBUG
"ieee80211_crypt: unregistered algorithm "
158 "'%s'\n", ops
->name
);
162 return del_alg
? 0 : -1;
166 struct ieee80211_crypto_ops
* ieee80211_get_crypto_ops(const char *name
)
169 struct list_head
*ptr
;
170 struct ieee80211_crypto_alg
*found_alg
= NULL
;
175 spin_lock_irqsave(&hcrypt
->lock
, flags
);
176 for (ptr
= hcrypt
->algs
.next
; ptr
!= &hcrypt
->algs
; ptr
= ptr
->next
) {
177 struct ieee80211_crypto_alg
*alg
=
178 (struct ieee80211_crypto_alg
*) ptr
;
179 if (strcmp(alg
->ops
->name
, name
) == 0) {
184 spin_unlock_irqrestore(&hcrypt
->lock
, flags
);
187 return found_alg
->ops
;
193 static void * ieee80211_crypt_null_init(int keyidx
) { return (void *) 1; }
194 static void ieee80211_crypt_null_deinit(void *priv
) {}
196 static struct ieee80211_crypto_ops ieee80211_crypt_null
= {
198 .init
= ieee80211_crypt_null_init
,
199 .deinit
= ieee80211_crypt_null_deinit
,
200 .encrypt_mpdu
= NULL
,
201 .decrypt_mpdu
= NULL
,
202 .encrypt_msdu
= NULL
,
203 .decrypt_msdu
= NULL
,
206 .extra_prefix_len
= 0,
207 .extra_postfix_len
= 0,
208 .owner
= THIS_MODULE
,
212 int ieee80211_crypto_init(void)
216 hcrypt
= kmalloc(sizeof(*hcrypt
), GFP_KERNEL
);
220 memset(hcrypt
, 0, sizeof(*hcrypt
));
221 INIT_LIST_HEAD(&hcrypt
->algs
);
222 spin_lock_init(&hcrypt
->lock
);
224 ret
= ieee80211_register_crypto_ops(&ieee80211_crypt_null
);
234 void ieee80211_crypto_deinit(void)
236 struct list_head
*ptr
, *n
;
237 struct ieee80211_crypto_alg
*alg
= NULL
;
242 list_for_each_safe(ptr
, n
, &hcrypt
->algs
) {
243 alg
= list_entry(ptr
, struct ieee80211_crypto_alg
, list
);
247 "ieee80211_crypt: unregistered algorithm '%s' (deinit)\n",
256 EXPORT_SYMBOL(ieee80211_crypt_deinit_entries
);
257 EXPORT_SYMBOL(ieee80211_crypt_deinit_handler
);
258 EXPORT_SYMBOL(ieee80211_crypt_delayed_deinit
);
260 EXPORT_SYMBOL(ieee80211_register_crypto_ops
);
261 EXPORT_SYMBOL(ieee80211_unregister_crypto_ops
);
262 EXPORT_SYMBOL(ieee80211_get_crypto_ops
);
265 //module_init(ieee80211_crypto_init);
266 //module_exit(ieee80211_crypto_deinit);