From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/staging/rtl8192e/rtllib_crypt.c | 254 ++++++++++++++++++++++++++++++++ 1 file changed, 254 insertions(+) create mode 100644 drivers/staging/rtl8192e/rtllib_crypt.c (limited to 'drivers/staging/rtl8192e/rtllib_crypt.c') diff --git a/drivers/staging/rtl8192e/rtllib_crypt.c b/drivers/staging/rtl8192e/rtllib_crypt.c new file mode 100644 index 000000000..1e6ae9bea --- /dev/null +++ b/drivers/staging/rtl8192e/rtllib_crypt.c @@ -0,0 +1,254 @@ +/* + * Host AP crypto routines + * + * Copyright (c) 2002-2003, Jouni Malinen + * Portions Copyright (C) 2004, Intel Corporation + * + * 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. + * + */ + +#include +#include +#include +#include +#include + +#include "rtllib.h" + +struct rtllib_crypto_alg { + struct list_head list; + struct lib80211_crypto_ops *ops; +}; + + +struct rtllib_crypto { + struct list_head algs; + spinlock_t lock; +}; + +static struct rtllib_crypto *hcrypt; + +void rtllib_crypt_deinit_entries(struct lib80211_crypt_info *info, + int force) +{ + struct list_head *ptr, *n; + struct lib80211_crypt_data *entry; + + for (ptr = info->crypt_deinit_list.next, n = ptr->next; + ptr != &info->crypt_deinit_list; ptr = n, n = ptr->next) { + entry = list_entry(ptr, struct lib80211_crypt_data, list); + + if (atomic_read(&entry->refcnt) != 0 && !force) + continue; + + list_del(ptr); + + if (entry->ops) + entry->ops->deinit(entry->priv); + kfree(entry); + } +} +EXPORT_SYMBOL(rtllib_crypt_deinit_entries); + +void rtllib_crypt_deinit_handler(unsigned long data) +{ + struct lib80211_crypt_info *info = (struct lib80211_crypt_info *)data; + unsigned long flags; + + spin_lock_irqsave(info->lock, flags); + rtllib_crypt_deinit_entries(info, 0); + if (!list_empty(&info->crypt_deinit_list)) { + printk(KERN_DEBUG + "%s: entries remaining in delayed crypt deletion list\n", + info->name); + info->crypt_deinit_timer.expires = jiffies + HZ; + add_timer(&info->crypt_deinit_timer); + } + spin_unlock_irqrestore(info->lock, flags); + +} +EXPORT_SYMBOL(rtllib_crypt_deinit_handler); + +void rtllib_crypt_delayed_deinit(struct lib80211_crypt_info *info, + struct lib80211_crypt_data **crypt) +{ + struct lib80211_crypt_data *tmp; + unsigned long flags; + + if (*crypt == NULL) + return; + + tmp = *crypt; + *crypt = NULL; + + /* must not run ops->deinit() while there may be pending encrypt or + * decrypt operations. Use a list of delayed deinits to avoid needing + * locking. + */ + + spin_lock_irqsave(info->lock, flags); + list_add(&tmp->list, &info->crypt_deinit_list); + if (!timer_pending(&info->crypt_deinit_timer)) { + info->crypt_deinit_timer.expires = jiffies + HZ; + add_timer(&info->crypt_deinit_timer); + } + spin_unlock_irqrestore(info->lock, flags); +} +EXPORT_SYMBOL(rtllib_crypt_delayed_deinit); + +int rtllib_register_crypto_ops(struct lib80211_crypto_ops *ops) +{ + unsigned long flags; + struct rtllib_crypto_alg *alg; + + if (hcrypt == NULL) + return -1; + + alg = kzalloc(sizeof(*alg), GFP_KERNEL); + if (alg == NULL) + return -ENOMEM; + + alg->ops = ops; + + spin_lock_irqsave(&hcrypt->lock, flags); + list_add(&alg->list, &hcrypt->algs); + spin_unlock_irqrestore(&hcrypt->lock, flags); + + printk(KERN_DEBUG "rtllib_crypt: registered algorithm '%s'\n", + ops->name); + + return 0; +} +EXPORT_SYMBOL(rtllib_register_crypto_ops); + +int rtllib_unregister_crypto_ops(struct lib80211_crypto_ops *ops) +{ + unsigned long flags; + struct list_head *ptr; + struct rtllib_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 rtllib_crypto_alg *alg = + (struct rtllib_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 "rtllib_crypt: unregistered algorithm '%s'\n", + ops->name); + kfree(del_alg); + } + + return del_alg ? 0 : -1; +} +EXPORT_SYMBOL(rtllib_unregister_crypto_ops); + + +struct lib80211_crypto_ops *rtllib_get_crypto_ops(const char *name) +{ + unsigned long flags; + struct list_head *ptr; + struct rtllib_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 rtllib_crypto_alg *alg = + (struct rtllib_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; +} +EXPORT_SYMBOL(rtllib_get_crypto_ops); + + +static void *rtllib_crypt_null_init(int keyidx) { return (void *) 1; } +static void rtllib_crypt_null_deinit(void *priv) {} + +static struct lib80211_crypto_ops rtllib_crypt_null = { + .name = "NULL", + .init = rtllib_crypt_null_init, + .deinit = rtllib_crypt_null_deinit, + .encrypt_mpdu = NULL, + .decrypt_mpdu = NULL, + .encrypt_msdu = NULL, + .decrypt_msdu = NULL, + .set_key = NULL, + .get_key = NULL, + .extra_mpdu_prefix_len = 0, + .extra_mpdu_postfix_len = 0, + .extra_msdu_prefix_len = 0, + .extra_msdu_postfix_len = 0, + .owner = THIS_MODULE, +}; + + +int __init rtllib_crypto_init(void) +{ + int ret = -ENOMEM; + + hcrypt = kzalloc(sizeof(*hcrypt), GFP_KERNEL); + if (!hcrypt) + goto out; + + INIT_LIST_HEAD(&hcrypt->algs); + spin_lock_init(&hcrypt->lock); + + ret = lib80211_register_crypto_ops(&rtllib_crypt_null); + if (ret < 0) { + kfree(hcrypt); + hcrypt = NULL; + } +out: + return ret; +} + + +void __exit rtllib_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 rtllib_crypto_alg *alg = + (struct rtllib_crypto_alg *) ptr; + list_del(ptr); + printk(KERN_DEBUG + "rtllib_crypt: unregistered algorithm '%s' (deinit)\n", + alg->ops->name); + kfree(alg); + } + + kfree(hcrypt); +} + +module_init(rtllib_crypto_init); +module_exit(rtllib_crypto_deinit); + +MODULE_LICENSE("GPL"); -- cgit v1.2.3-54-g00ecf