linux/drivers/staging/rtl8192e/rtllib_crypt_wep.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Host AP crypt: host-based WEP encryption implementation for Host AP driver
 *
 * Copyright (c) 2002-2004, Jouni Malinen <[email protected]>
 */

#include <crypto/arc4.h>
#include <linux/fips.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/random.h>
#include <linux/skbuff.h>
#include <linux/string.h>
#include "rtllib.h"

#include <linux/crc32.h>

struct prism2_wep_data { … };

static void *prism2_wep_init(int keyidx)
{ … }

static void prism2_wep_deinit(void *priv)
{ … }

/* Perform WEP encryption on given skb that has at least 4 bytes of headroom
 * for IV and 4 bytes of tailroom for ICV. Both IV and ICV will be transmitted,
 * so the payload length increases with 8 bytes.
 *
 * WEP frame payload: IV + TX key idx, RC4(data), ICV = RC4(CRC32(data))
 */
static int prism2_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
{ … }

/* Perform WEP decryption on given struct buffer. Buffer includes whole WEP
 * part of the frame: IV (4 bytes), encrypted payload (including SNAP header),
 * ICV (4 bytes). len includes both IV and ICV.
 *
 * Returns 0 if frame was decrypted successfully and ICV was correct and -1 on
 * failure. If frame is OK, IV and ICV will be removed.
 */
static int prism2_wep_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
{ … }

static int prism2_wep_set_key(void *key, int len, u8 *seq, void *priv)
{ … }

static int prism2_wep_get_key(void *key, int len, u8 *seq, void *priv)
{ … }

static void prism2_wep_print_stats(struct seq_file *m, void *priv)
{ … }

static struct lib80211_crypto_ops rtllib_crypt_wep = …;

static int __init rtllib_crypto_wep_init(void)
{ … }

static void __exit rtllib_crypto_wep_exit(void)
{ … }

module_init(rtllib_crypto_wep_init);
module_exit(rtllib_crypto_wep_exit);

MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;