1 files changed, 167 insertions, 0 deletions

diff --git a/drivers/net/wireless/hostap/hostap_crypt.c b/drivers/net/wireless/hostap/hostap_crypt.c
new file mode 100644
index 000000000000..de5390d502f1
--- /dev/null
+++ b/drivers/net/wireless/hostap/hostap_crypt.c
@@ -0,0 +1,167 @@
+/*
+ * Host AP crypto routines
+ *
+ * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation. See README and COPYING for
+ * more details.
+ */
+
+struct hostap_crypto_alg {
+        struct list_head list;
+        struct hostap_crypto_ops *ops;
+};
+
+
+struct hostap_crypto {
+        struct list_head algs;
+        spinlock_t lock;
+};
+
+static struct hostap_crypto *hcrypt;
+
+
+int hostap_register_crypto_ops(struct hostap_crypto_ops *ops)
+{
+        unsigned long flags;
+        struct hostap_crypto_alg *alg;
+
+        if (hcrypt == NULL)
+                return -1;
+
+        alg = (struct hostap_crypto_alg *) kmalloc(sizeof(*alg), GFP_KERNEL);
+        if (alg == NULL)
+                return -ENOMEM;
+
+        memset(alg, 0, sizeof(*alg));
+        alg->ops = ops;
+
+        spin_lock_irqsave(&hcrypt->lock, flags);
+        list_add(&alg->list, &hcrypt->algs);
+        spin_unlock_irqrestore(&hcrypt->lock, flags);
+
+        printk(KERN_DEBUG "hostap_crypt: registered algorithm '%s'\n",
+               ops->name);
+
+        return 0;
+}
+
+
+int hostap_unregister_crypto_ops(struct hostap_crypto_ops *ops)
+{
+        unsigned long flags;
+        struct list_head *ptr;
+        struct hostap_crypto_alg *del_alg = NULL;
+
+        if (hcrypt == NULL)
+                return -1;
+
+        spin_lock_irqsave(&hcrypt->lock, flags);
+        for (ptr = hcrypt->algs.next; ptr != &hcrypt->algs; ptr = ptr->next) {
+                struct hostap_crypto_alg *alg =
+                        (struct hostap_crypto_alg *) ptr;
+                if (alg->ops == ops) {
+                        list_del(&alg->list);
+                        del_alg = alg;
+                        break;
+                }
+        }
+        spin_unlock_irqrestore(&hcrypt->lock, flags);
+
+        if (del_alg) {
+                printk(KERN_DEBUG "hostap_crypt: unregistered algorithm "
+                       "'%s'\n", ops->name);
+                kfree(del_alg);
+        }
+
+        return del_alg ? 0 : -1;
+}
+
+
+struct hostap_crypto_ops * hostap_get_crypto_ops(const char *name)
+{
+        unsigned long flags;
+        struct list_head *ptr;
+        struct hostap_crypto_alg *found_alg = NULL;
+
+        if (hcrypt == NULL)
+                return NULL;
+
+        spin_lock_irqsave(&hcrypt->lock, flags);
+        for (ptr = hcrypt->algs.next; ptr != &hcrypt->algs; ptr = ptr->next) {
+                struct hostap_crypto_alg *alg =
+                        (struct hostap_crypto_alg *) ptr;
+                if (strcmp(alg->ops->name, name) == 0) {
+                        found_alg = alg;
+                        break;
+                }
+        }
+        spin_unlock_irqrestore(&hcrypt->lock, flags);
+
+        if (found_alg)
+                return found_alg->ops;
+        else
+                return NULL;
+}
+
+
+static void * hostap_crypt_null_init(int keyidx) { return (void *) 1; }
+static void hostap_crypt_null_deinit(void *priv) {}
+
+static struct hostap_crypto_ops hostap_crypt_null = {
+        .name                   = "NULL",
+        .init                   = hostap_crypt_null_init,
+        .deinit                 = hostap_crypt_null_deinit,
+        .encrypt_mpdu           = NULL,
+        .decrypt_mpdu           = NULL,
+        .encrypt_msdu           = NULL,
+        .decrypt_msdu           = NULL,
+        .set_key                = NULL,
+        .get_key                = NULL,
+        .extra_prefix_len       = 0,
+        .extra_postfix_len      = 0
+};
+
+
+static int __init hostap_crypto_init(void)
+{
+        hcrypt = (struct hostap_crypto *) kmalloc(sizeof(*hcrypt), GFP_KERNEL);
+        if (hcrypt == NULL)
+                return -ENOMEM;
+
+        memset(hcrypt, 0, sizeof(*hcrypt));
+        INIT_LIST_HEAD(&hcrypt->algs);
+        spin_lock_init(&hcrypt->lock);
+
+        (void) hostap_register_crypto_ops(&hostap_crypt_null);
+
+        return 0;
+}
+
+
+static void __exit hostap_crypto_deinit(void)
+{
+        struct list_head *ptr, *n;
+
+        if (hcrypt == NULL)
+                return;
+
+        for (ptr = hcrypt->algs.next, n = ptr->next; ptr != &hcrypt->algs;
+             ptr = n, n = ptr->next) {
+                struct hostap_crypto_alg *alg =
+                        (struct hostap_crypto_alg *) ptr;
+                list_del(ptr);
+                printk(KERN_DEBUG "hostap_crypt: unregistered algorithm "
+                       "'%s' (deinit)\n", alg->ops->name);
+                kfree(alg);
+        }
+
+        kfree(hcrypt);
+}
+
+
+EXPORT_SYMBOL(hostap_register_crypto_ops);
+EXPORT_SYMBOL(hostap_unregister_crypto_ops);
+EXPORT_SYMBOL(hostap_get_crypto_ops);