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提交 b453872c 编写于 作者: J Jeff Garzik
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[NET] ieee80211 subsystem 

Contributors:
Host AP contributors
James Ketrenos <jketreno@linux.intel.com>
Francois Romieu <romieu@fr.zoreil.com>
Adrian Bunk <bunk@stusta.de>
Matthew Galgoci <mgalgoci@parcelfarce.linux.th
eplanet.co.uk>
上级 fff9cfd9
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Showing with 5195 addition and 116 deletion
drivers/net/wireless/atmel.c
浏览文件 @ b453872c
......@@ -68,7 +68,7 @@
#include <linux/device.h>
#include <linux/moduleparam.h>
#include <linux/firmware.h>
#include "ieee802_11.h"
#include <net/ieee80211.h>
#include "atmel.h"
#define DRIVER_MAJOR 0
......@@ -618,12 +618,12 @@ static int atmel_lock_mac(struct atmel_private *priv);
static void atmel_wmem32(struct atmel_private *priv, u16 pos, u32 data);
static void atmel_command_irq(struct atmel_private *priv);
static int atmel_validate_channel(struct atmel_private *priv, int channel);
static void atmel_management_frame(struct atmel_private *priv, struct ieee802_11_hdr *header,
static void atmel_management_frame(struct atmel_private *priv, struct ieee80211_hdr *header,
u16 frame_len, u8 rssi);
static void atmel_management_timer(u_long a);
static void atmel_send_command(struct atmel_private *priv, int command, void *cmd, int cmd_size);
static int atmel_send_command_wait(struct atmel_private *priv, int command, void *cmd, int cmd_size);
static void atmel_transmit_management_frame(struct atmel_private *priv, struct ieee802_11_hdr *header,
static void atmel_transmit_management_frame(struct atmel_private *priv, struct ieee80211_hdr *header,
u8 *body, int body_len);
static u8 atmel_get_mib8(struct atmel_private *priv, u8 type, u8 index);
......@@ -827,7 +827,7 @@ static void tx_update_descriptor(struct atmel_private *priv, int is_bcast, u16 l
static int start_tx (struct sk_buff *skb, struct net_device *dev)
{
struct atmel_private *priv = netdev_priv(dev);
struct ieee802_11_hdr header;
struct ieee80211_hdr header;
unsigned long flags;
u16 buff, frame_ctl, len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
u8 SNAP_RFC1024[6] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
......@@ -863,17 +863,17 @@ static int start_tx (struct sk_buff *skb, struct net_device *dev)
return 1;
}
frame_ctl = IEEE802_11_FTYPE_DATA;
frame_ctl = IEEE80211_FTYPE_DATA;
header.duration_id = 0;
header.seq_ctl = 0;
if (priv->wep_is_on)
frame_ctl |= IEEE802_11_FCTL_WEP;
frame_ctl |= IEEE80211_FCTL_WEP;
if (priv->operating_mode == IW_MODE_ADHOC) {
memcpy(&header.addr1, skb->data, 6);
memcpy(&header.addr2, dev->dev_addr, 6);
memcpy(&header.addr3, priv->BSSID, 6);
} else {
frame_ctl |= IEEE802_11_FCTL_TODS;
frame_ctl |= IEEE80211_FCTL_TODS;
memcpy(&header.addr1, priv->CurrentBSSID, 6);
memcpy(&header.addr2, dev->dev_addr, 6);
memcpy(&header.addr3, skb->data, 6);
......@@ -902,7 +902,7 @@ static int start_tx (struct sk_buff *skb, struct net_device *dev)
}
static void atmel_transmit_management_frame(struct atmel_private *priv,
struct ieee802_11_hdr *header,
struct ieee80211_hdr *header,
u8 *body, int body_len)
{
u16 buff;
......@@ -917,7 +917,7 @@ static void atmel_transmit_management_frame(struct atmel_private *priv,
tx_update_descriptor(priv, header->addr1[0] & 0x01, len, buff, TX_PACKET_TYPE_MGMT);
}
static void fast_rx_path(struct atmel_private *priv, struct ieee802_11_hdr *header,
static void fast_rx_path(struct atmel_private *priv, struct ieee80211_hdr *header,
u16 msdu_size, u16 rx_packet_loc, u32 crc)
{
/* fast path: unfragmented packet copy directly into skbuf */
......@@ -955,7 +955,7 @@ static void fast_rx_path(struct atmel_private *priv, struct ieee802_11_hdr *head
}
memcpy(skbp, header->addr1, 6); /* destination address */
if (le16_to_cpu(header->frame_ctl) & IEEE802_11_FCTL_FROMDS)
if (le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_FROMDS)
memcpy(&skbp[6], header->addr3, 6);
else
memcpy(&skbp[6], header->addr2, 6); /* source address */
......@@ -990,14 +990,14 @@ static int probe_crc(struct atmel_private *priv, u16 packet_loc, u16 msdu_size)
return (crc ^ 0xffffffff) == netcrc;
}
static void frag_rx_path(struct atmel_private *priv, struct ieee802_11_hdr *header,
static void frag_rx_path(struct atmel_private *priv, struct ieee80211_hdr *header,
u16 msdu_size, u16 rx_packet_loc, u32 crc, u16 seq_no, u8 frag_no, int more_frags)
{
u8 mac4[6];
u8 source[6];
struct sk_buff *skb;
if (le16_to_cpu(header->frame_ctl) & IEEE802_11_FCTL_FROMDS)
if (le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_FROMDS)
memcpy(source, header->addr3, 6);
else
memcpy(source, header->addr2, 6);
......@@ -1082,7 +1082,7 @@ static void frag_rx_path(struct atmel_private *priv, struct ieee802_11_hdr *head
static void rx_done_irq(struct atmel_private *priv)
{
int i;
struct ieee802_11_hdr header;
struct ieee80211_hdr header;
for (i = 0;
atmel_rmem8(priv, atmel_rx(priv, RX_DESC_FLAGS_OFFSET, priv->rx_desc_head)) == RX_DESC_FLAG_VALID &&
......@@ -1117,7 +1117,7 @@ static void rx_done_irq(struct atmel_private *priv)
/* probe for CRC use here if needed once five packets have arrived with
the same crc status, we assume we know what's happening and stop probing */
if (priv->probe_crc) {
if (!priv->wep_is_on || !(frame_ctl & IEEE802_11_FCTL_WEP)) {
if (!priv->wep_is_on || !(frame_ctl & IEEE80211_FCTL_WEP)) {
priv->do_rx_crc = probe_crc(priv, rx_packet_loc, msdu_size);
} else {
priv->do_rx_crc = probe_crc(priv, rx_packet_loc + 24, msdu_size - 24);
......@@ -1132,16 +1132,16 @@ static void rx_done_irq(struct atmel_private *priv)
}
/* don't CRC header when WEP in use */
if (priv->do_rx_crc && (!priv->wep_is_on || !(frame_ctl & IEEE802_11_FCTL_WEP))) {
if (priv->do_rx_crc && (!priv->wep_is_on || !(frame_ctl & IEEE80211_FCTL_WEP))) {
crc = crc32_le(0xffffffff, (unsigned char *)&header, 24);
}
msdu_size -= 24; /* header */
if ((frame_ctl & IEEE802_11_FCTL_FTYPE) == IEEE802_11_FTYPE_DATA) {
if ((frame_ctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) {
int more_fragments = frame_ctl & IEEE802_11_FCTL_MOREFRAGS;
u8 packet_fragment_no = seq_control & IEEE802_11_SCTL_FRAG;
u16 packet_sequence_no = (seq_control & IEEE802_11_SCTL_SEQ) >> 4;
int more_fragments = frame_ctl & IEEE80211_FCTL_MOREFRAGS;
u8 packet_fragment_no = seq_control & IEEE80211_SCTL_FRAG;
u16 packet_sequence_no = (seq_control & IEEE80211_SCTL_SEQ) >> 4;
if (!more_fragments && packet_fragment_no == 0 ) {
fast_rx_path(priv, &header, msdu_size, rx_packet_loc, crc);
......@@ -1151,7 +1151,7 @@ static void rx_done_irq(struct atmel_private *priv)
}
}
if ((frame_ctl & IEEE802_11_FCTL_FTYPE) == IEEE802_11_FTYPE_MGMT) {
if ((frame_ctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
/* copy rest of packet into buffer */
atmel_copy_to_host(priv->dev, (unsigned char *)&priv->rx_buf, rx_packet_loc + 24, msdu_size);
......@@ -2663,10 +2663,10 @@ static void handle_beacon_probe(struct atmel_private *priv, u16 capability, u8 c
static void send_authentication_request(struct atmel_private *priv, u8 *challenge, int challenge_len)
{
struct ieee802_11_hdr header;
struct ieee80211_hdr header;
struct auth_body auth;
header.frame_ctl = cpu_to_le16(IEEE802_11_FTYPE_MGMT | IEEE802_11_STYPE_AUTH);
header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH);
header.duration_id = cpu_to_le16(0x8000);
header.seq_ctl = 0;
memcpy(header.addr1, priv->CurrentBSSID, 6);
......@@ -2677,7 +2677,7 @@ static void send_authentication_request(struct atmel_private *priv, u8 *challeng
auth.alg = cpu_to_le16(C80211_MGMT_AAN_SHAREDKEY);
/* no WEP for authentication frames with TrSeqNo 1 */
if (priv->CurrentAuthentTransactionSeqNum != 1)
header.frame_ctl |= cpu_to_le16(IEEE802_11_FCTL_WEP);
header.frame_ctl |= cpu_to_le16(IEEE80211_FCTL_WEP);
} else {
auth.alg = cpu_to_le16(C80211_MGMT_AAN_OPENSYSTEM);
}
......@@ -2701,7 +2701,7 @@ static void send_association_request(struct atmel_private *priv, int is_reassoc)
{
u8 *ssid_el_p;
int bodysize;
struct ieee802_11_hdr header;
struct ieee80211_hdr header;
struct ass_req_format {
u16 capability;
u16 listen_interval;
......@@ -2714,8 +2714,8 @@ static void send_association_request(struct atmel_private *priv, int is_reassoc)
u8 rates[4];
} body;
header.frame_ctl = cpu_to_le16(IEEE802_11_FTYPE_MGMT |
(is_reassoc ? IEEE802_11_STYPE_REASSOC_REQ : IEEE802_11_STYPE_ASSOC_REQ));
header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_MGMT |
(is_reassoc ? IEEE80211_STYPE_REASSOC_REQ : IEEE80211_STYPE_ASSOC_REQ));
header.duration_id = cpu_to_le16(0x8000);
header.seq_ctl = 0;
......@@ -2751,9 +2751,9 @@ static void send_association_request(struct atmel_private *priv, int is_reassoc)
atmel_transmit_management_frame(priv, &header, (void *)&body, bodysize);
}
static int is_frame_from_current_bss(struct atmel_private *priv, struct ieee802_11_hdr *header)
static int is_frame_from_current_bss(struct atmel_private *priv, struct ieee80211_hdr *header)
{
if (le16_to_cpu(header->frame_ctl) & IEEE802_11_FCTL_FROMDS)
if (le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_FROMDS)
return memcmp(header->addr3, priv->CurrentBSSID, 6) == 0;
else
return memcmp(header->addr2, priv->CurrentBSSID, 6) == 0;
......@@ -2801,7 +2801,7 @@ static int retrieve_bss(struct atmel_private *priv)
}
static void store_bss_info(struct atmel_private *priv, struct ieee802_11_hdr *header,
static void store_bss_info(struct atmel_private *priv, struct ieee80211_hdr *header,
u16 capability, u16 beacon_period, u8 channel, u8 rssi,
u8 ssid_len, u8 *ssid, int is_beacon)
{
......@@ -3085,12 +3085,12 @@ static void atmel_smooth_qual(struct atmel_private *priv)
}
/* deals with incoming managment frames. */
static void atmel_management_frame(struct atmel_private *priv, struct ieee802_11_hdr *header,
static void atmel_management_frame(struct atmel_private *priv, struct ieee80211_hdr *header,
u16 frame_len, u8 rssi)
{
u16 subtype;
switch (subtype = le16_to_cpu(header->frame_ctl) & IEEE802_11_FCTL_STYPE) {
switch (subtype = le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_STYPE) {
case C80211_SUBTYPE_MGMT_BEACON :
case C80211_SUBTYPE_MGMT_ProbeResponse:
......
drivers/net/wireless/ieee802_11.h 已删除 100644 → 0
浏览文件 @ fff9cfd9
#ifndef _IEEE802_11_H
#define _IEEE802_11_H
#define IEEE802_11_DATA_LEN 2304
/* Maximum size for the MA-UNITDATA primitive, 802.11 standard section
6.2.1.1.2.
The figure in section 7.1.2 suggests a body size of up to 2312
bytes is allowed, which is a bit confusing, I suspect this
represents the 2304 bytes of real data, plus a possible 8 bytes of
WEP IV and ICV. (this interpretation suggested by Ramiro Barreiro) */
#define IEEE802_11_HLEN 30
#define IEEE802_11_FRAME_LEN (IEEE802_11_DATA_LEN + IEEE802_11_HLEN)
struct ieee802_11_hdr {
u16 frame_ctl;
u16 duration_id;
u8 addr1[ETH_ALEN];
u8 addr2[ETH_ALEN];
u8 addr3[ETH_ALEN];
u16 seq_ctl;
u8 addr4[ETH_ALEN];
} __attribute__ ((packed));
/* Frame control field constants */
#define IEEE802_11_FCTL_VERS 0x0002
#define IEEE802_11_FCTL_FTYPE 0x000c
#define IEEE802_11_FCTL_STYPE 0x00f0
#define IEEE802_11_FCTL_TODS 0x0100
#define IEEE802_11_FCTL_FROMDS 0x0200
#define IEEE802_11_FCTL_MOREFRAGS 0x0400
#define IEEE802_11_FCTL_RETRY 0x0800
#define IEEE802_11_FCTL_PM 0x1000
#define IEEE802_11_FCTL_MOREDATA 0x2000
#define IEEE802_11_FCTL_WEP 0x4000
#define IEEE802_11_FCTL_ORDER 0x8000
#define IEEE802_11_FTYPE_MGMT 0x0000
#define IEEE802_11_FTYPE_CTL 0x0004
#define IEEE802_11_FTYPE_DATA 0x0008
/* management */
#define IEEE802_11_STYPE_ASSOC_REQ 0x0000
#define IEEE802_11_STYPE_ASSOC_RESP 0x0010
#define IEEE802_11_STYPE_REASSOC_REQ 0x0020
#define IEEE802_11_STYPE_REASSOC_RESP 0x0030
#define IEEE802_11_STYPE_PROBE_REQ 0x0040
#define IEEE802_11_STYPE_PROBE_RESP 0x0050
#define IEEE802_11_STYPE_BEACON 0x0080
#define IEEE802_11_STYPE_ATIM 0x0090
#define IEEE802_11_STYPE_DISASSOC 0x00A0
#define IEEE802_11_STYPE_AUTH 0x00B0
#define IEEE802_11_STYPE_DEAUTH 0x00C0
/* control */
#define IEEE802_11_STYPE_PSPOLL 0x00A0
#define IEEE802_11_STYPE_RTS 0x00B0
#define IEEE802_11_STYPE_CTS 0x00C0
#define IEEE802_11_STYPE_ACK 0x00D0
#define IEEE802_11_STYPE_CFEND 0x00E0
#define IEEE802_11_STYPE_CFENDACK 0x00F0
/* data */
#define IEEE802_11_STYPE_DATA 0x0000
#define IEEE802_11_STYPE_DATA_CFACK 0x0010
#define IEEE802_11_STYPE_DATA_CFPOLL 0x0020
#define IEEE802_11_STYPE_DATA_CFACKPOLL 0x0030
#define IEEE802_11_STYPE_NULLFUNC 0x0040
#define IEEE802_11_STYPE_CFACK 0x0050
#define IEEE802_11_STYPE_CFPOLL 0x0060
#define IEEE802_11_STYPE_CFACKPOLL 0x0070
#define IEEE802_11_SCTL_FRAG 0x000F
#define IEEE802_11_SCTL_SEQ 0xFFF0
#endif /* _IEEE802_11_H */
drivers/net/wireless/orinoco.c
浏览文件 @ b453872c
......@@ -464,6 +464,8 @@
#include <linux/etherdevice.h>
#include <linux/wireless.h>
#include <net/ieee80211.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/system.h>
......@@ -471,7 +473,6 @@
#include "hermes.h"
#include "hermes_rid.h"
#include "orinoco.h"
#include "ieee802_11.h"
/********************************************************************/
/* Module information */
......@@ -509,7 +510,7 @@ MODULE_PARM_DESC(suppress_linkstatus, "Don't log link status changes");
/********************************************************************/
#define ORINOCO_MIN_MTU 256
#define ORINOCO_MAX_MTU (IEEE802_11_DATA_LEN - ENCAPS_OVERHEAD)
#define ORINOCO_MAX_MTU (IEEE80211_DATA_LEN - ENCAPS_OVERHEAD)
#define SYMBOL_MAX_VER_LEN (14)
#define USER_BAP 0
......@@ -760,7 +761,7 @@ static int orinoco_change_mtu(struct net_device *dev, int new_mtu)
if ( (new_mtu < ORINOCO_MIN_MTU) || (new_mtu > ORINOCO_MAX_MTU) )
return -EINVAL;
if ( (new_mtu + ENCAPS_OVERHEAD + IEEE802_11_HLEN) >
if ( (new_mtu + ENCAPS_OVERHEAD + IEEE80211_HLEN) >
(priv->nicbuf_size - ETH_HLEN) )
return -EINVAL;
......@@ -1104,7 +1105,7 @@ static void __orinoco_ev_rx(struct net_device *dev, hermes_t *hw)
stats->rx_dropped++;
goto drop;
}
if (length > IEEE802_11_DATA_LEN) {
if (length > IEEE80211_DATA_LEN) {
printk(KERN_WARNING "%s: Oversized frame received (%d bytes)\n",
dev->name, length);
stats->rx_length_errors++;
......@@ -2264,7 +2265,7 @@ static int orinoco_init(struct net_device *dev)
/* No need to lock, the hw_unavailable flag is already set in
* alloc_orinocodev() */
priv->nicbuf_size = IEEE802_11_FRAME_LEN + ETH_HLEN;
priv->nicbuf_size = IEEE80211_FRAME_LEN + ETH_HLEN;
/* Initialize the firmware */
err = hermes_init(hw);
......
drivers/net/wireless/wl3501.h
浏览文件 @ b453872c
......@@ -2,7 +2,7 @@
#define __WL3501_H__
#include <linux/spinlock.h>
#include "ieee802_11.h"
#include <net/ieee80211.h>
/* define for WLA 2.0 */
#define WL3501_BLKSZ 256
......@@ -548,7 +548,7 @@ struct wl3501_80211_tx_plcp_hdr {
struct wl3501_80211_tx_hdr {
struct wl3501_80211_tx_plcp_hdr pclp_hdr;
struct ieee802_11_hdr mac_hdr;
struct ieee80211_hdr mac_hdr;
} __attribute__ ((packed));
/*
......
include/net/ieee80211.h 0 → 100644
浏览文件 @ b453872c
此差异已折叠。
include/net/ieee80211_crypt.h 0 → 100644
浏览文件 @ b453872c
/*
* Original code based on Host AP (software wireless LAN access point) driver
* for Intersil Prism2/2.5/3.
*
* Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
* <jkmaline@cc.hut.fi>
* Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
*
* Adaption to a generic IEEE 802.11 stack by James Ketrenos
* <jketreno@linux.intel.com>
*
* 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.
*/
/*
* This file defines the interface to the ieee80211 crypto module.
*/
#ifndef IEEE80211_CRYPT_H
#define IEEE80211_CRYPT_H
#include <linux/skbuff.h>
struct ieee80211_crypto_ops {
const char *name;
/* init new crypto context (e.g., allocate private data space,
* select IV, etc.); returns NULL on failure or pointer to allocated
* private data on success */
void * (*init)(int keyidx);
/* deinitialize crypto context and free allocated private data */
void (*deinit)(void *priv);
/* encrypt/decrypt return < 0 on error or >= 0 on success. The return
* value from decrypt_mpdu is passed as the keyidx value for
* decrypt_msdu. skb must have enough head and tail room for the
* encryption; if not, error will be returned; these functions are
* called for all MPDUs (i.e., fragments).
*/
int (*encrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv);
int (*decrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv);
/* These functions are called for full MSDUs, i.e. full frames.
* These can be NULL if full MSDU operations are not needed. */
int (*encrypt_msdu)(struct sk_buff *skb, int hdr_len, void *priv);
int (*decrypt_msdu)(struct sk_buff *skb, int keyidx, int hdr_len,
void *priv);
int (*set_key)(void *key, int len, u8 *seq, void *priv);
int (*get_key)(void *key, int len, u8 *seq, void *priv);
/* procfs handler for printing out key information and possible
* statistics */
char * (*print_stats)(char *p, void *priv);
/* maximum number of bytes added by encryption; encrypt buf is
* allocated with extra_prefix_len bytes, copy of in_buf, and
* extra_postfix_len; encrypt need not use all this space, but
* the result must start at the beginning of the buffer and correct
* length must be returned */
int extra_prefix_len, extra_postfix_len;
struct module *owner;
};
struct ieee80211_crypt_data {
struct list_head list; /* delayed deletion list */
struct ieee80211_crypto_ops *ops;
void *priv;
atomic_t refcnt;
};
int ieee80211_register_crypto_ops(struct ieee80211_crypto_ops *ops);
int ieee80211_unregister_crypto_ops(struct ieee80211_crypto_ops *ops);
struct ieee80211_crypto_ops * ieee80211_get_crypto_ops(const char *name);
void ieee80211_crypt_deinit_entries(struct ieee80211_device *, int);
void ieee80211_crypt_deinit_handler(unsigned long);
void ieee80211_crypt_delayed_deinit(struct ieee80211_device *ieee,
struct ieee80211_crypt_data **crypt);
#endif
net/Kconfig
浏览文件 @ b453872c
......@@ -640,6 +640,8 @@ source "net/irda/Kconfig"
source "net/bluetooth/Kconfig"
source "net/ieee80211/Kconfig"
source "drivers/net/Kconfig"
endmenu
......
net/Makefile
浏览文件 @ b453872c
......@@ -42,6 +42,7 @@ obj-$(CONFIG_DECNET) += decnet/
obj-$(CONFIG_ECONET) += econet/
obj-$(CONFIG_VLAN_8021Q) += 8021q/
obj-$(CONFIG_IP_SCTP) += sctp/
obj-$(CONFIG_IEEE80211) += ieee80211/
ifeq ($(CONFIG_NET),y)
obj-$(CONFIG_SYSCTL) += sysctl_net.o
......
net/ieee80211/Kconfig 0 → 100644
浏览文件 @ b453872c
config IEEE80211
tristate "Generic IEEE 802.11 Networking Stack"
select NET_RADIO
---help---
This option enables the hardware independent IEEE 802.11
networking stack.
config IEEE80211_DEBUG
bool "Enable full debugging output"
depends on IEEE80211
---help---
This option will enable debug tracing output for the
ieee80211 network stack.
This will result in the kernel module being ~70k larger. You
can control which debug output is sent to the kernel log by
setting the value in
/proc/net/ieee80211/debug_level
For example:
% echo 0x00000FFO > /proc/net/ieee80211/debug_level
For a list of values you can assign to debug_level, you
can look at the bit mask values in <net/ieee80211.h>
If you are not trying to debug or develop the ieee80211
subsystem, you most likely want to say N here.
config IEEE80211_CRYPT_WEP
tristate "IEEE 802.11 WEP encryption (802.1x)"
depends on IEEE80211
select CRYPTO
select CRYPTO_ARC4
select CRC32
---help---
Include software based cipher suites in support of IEEE
802.11's WEP. This is needed for WEP as well as 802.1x.
This can be compiled as a modules and it will be called
"ieee80211_crypt_wep".
config IEEE80211_CRYPT_CCMP
tristate "IEEE 802.11i CCMP support"
depends on IEEE80211
select CRYPTO_AES
---help---
Include software based cipher suites in support of IEEE 802.11i
(aka TGi, WPA, WPA2, WPA-PSK, etc.) for use with CCMP enabled
networks.
This can be compiled as a modules and it will be called
"ieee80211_crypt_ccmp".
config IEEE80211_CRYPT_TKIP
tristate "IEEE 802.11i TKIP encryption"
depends on IEEE80211
select CRYPTO_MICHAEL_MIC
---help---
Include software based cipher suites in support of IEEE 802.11i
(aka TGi, WPA, WPA2, WPA-PSK, etc.) for use with TKIP enabled
networks.
This can be compiled as a modules and it will be called
"ieee80211_crypt_tkip".
net/ieee80211/Makefile 0 → 100644
浏览文件 @ b453872c
obj-$(CONFIG_IEEE80211) += ieee80211.o
obj-$(CONFIG_IEEE80211) += ieee80211_crypt.o
obj-$(CONFIG_IEEE80211_CRYPT_WEP) += ieee80211_crypt_wep.o
obj-$(CONFIG_IEEE80211_CRYPT_CCMP) += ieee80211_crypt_ccmp.o
obj-$(CONFIG_IEEE80211_CRYPT_TKIP) += ieee80211_crypt_tkip.o
ieee80211-objs := \
ieee80211_module.o \
ieee80211_tx.o \
ieee80211_rx.o \
ieee80211_wx.o
net/ieee80211/ieee80211_crypt.c 0 → 100644
浏览文件 @ b453872c
/*
* Host AP crypto routines
*
* Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
* Portions Copyright (C) 2004, Intel Corporation <jketreno@linux.intel.com>
*
* 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 <linux/config.h>
#include <linux/version.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <asm/string.h>
#include <asm/errno.h>
#include <net/ieee80211.h>
MODULE_AUTHOR("Jouni Malinen");
MODULE_DESCRIPTION("HostAP crypto");
MODULE_LICENSE("GPL");
struct ieee80211_crypto_alg {
struct list_head list;
struct ieee80211_crypto_ops *ops;
};
struct ieee80211_crypto {
struct list_head algs;
spinlock_t lock;
};
static struct ieee80211_crypto *hcrypt;
void ieee80211_crypt_deinit_entries(struct ieee80211_device *ieee,
int force)
{
struct list_head *ptr, *n;
struct ieee80211_crypt_data *entry;
for (ptr = ieee->crypt_deinit_list.next, n = ptr->next;
ptr != &ieee->crypt_deinit_list; ptr = n, n = ptr->next) {
entry = list_entry(ptr, struct ieee80211_crypt_data, list);
if (atomic_read(&entry->refcnt) != 0 && !force)
continue;
list_del(ptr);
if (entry->ops) {
entry->ops->deinit(entry->priv);
module_put(entry->ops->owner);
}
kfree(entry);
}
}
void ieee80211_crypt_deinit_handler(unsigned long data)
{
struct ieee80211_device *ieee = (struct ieee80211_device *)data;
unsigned long flags;
spin_lock_irqsave(&ieee->lock, flags);
ieee80211_crypt_deinit_entries(ieee, 0);
if (!list_empty(&ieee->crypt_deinit_list)) {
printk(KERN_DEBUG "%s: entries remaining in delayed crypt "
"deletion list\n", ieee->dev->name);
ieee->crypt_deinit_timer.expires = jiffies + HZ;
add_timer(&ieee->crypt_deinit_timer);
}
spin_unlock_irqrestore(&ieee->lock, flags);
}
void ieee80211_crypt_delayed_deinit(struct ieee80211_device *ieee,
struct ieee80211_crypt_data **crypt)
{
struct ieee80211_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(&ieee->lock, flags);
list_add(&tmp->list, &ieee->crypt_deinit_list);
if (!timer_pending(&ieee->crypt_deinit_timer)) {
ieee->crypt_deinit_timer.expires = jiffies + HZ;
add_timer(&ieee->crypt_deinit_timer);
}
spin_unlock_irqrestore(&ieee->lock, flags);
}
int ieee80211_register_crypto_ops(struct ieee80211_crypto_ops *ops)
{
unsigned long flags;
struct ieee80211_crypto_alg *alg;
if (hcrypt == NULL)
return -1;
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 "ieee80211_crypt: registered algorithm '%s'\n",
ops->name);
return 0;
}
int ieee80211_unregister_crypto_ops(struct ieee80211_crypto_ops *ops)
{
unsigned long flags;
struct list_head *ptr;
struct ieee80211_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 ieee80211_crypto_alg *alg =
(struct ieee80211_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 "ieee80211_crypt: unregistered algorithm "
"'%s'\n", ops->name);
kfree(del_alg);
}
return del_alg ? 0 : -1;
}
struct ieee80211_crypto_ops * ieee80211_get_crypto_ops(const char *name)
{
unsigned long flags;
struct list_head *ptr;
struct ieee80211_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 ieee80211_crypto_alg *alg =
(struct ieee80211_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 * ieee80211_crypt_null_init(int keyidx) { return (void *) 1; }
static void ieee80211_crypt_null_deinit(void *priv) {}
static struct ieee80211_crypto_ops ieee80211_crypt_null = {
.name = "NULL",
.init = ieee80211_crypt_null_init,
.deinit = ieee80211_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,
.owner = THIS_MODULE,
};
static int __init ieee80211_crypto_init(void)
{
int ret = -ENOMEM;
hcrypt = kmalloc(sizeof(*hcrypt), GFP_KERNEL);
if (!hcrypt)
goto out;
memset(hcrypt, 0, sizeof(*hcrypt));
INIT_LIST_HEAD(&hcrypt->algs);
spin_lock_init(&hcrypt->lock);
ret = ieee80211_register_crypto_ops(&ieee80211_crypt_null);
if (ret < 0) {
kfree(hcrypt);
hcrypt = NULL;
}
out:
return ret;
}
static void __exit ieee80211_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 ieee80211_crypto_alg *alg =
(struct ieee80211_crypto_alg *) ptr;
list_del(ptr);
printk(KERN_DEBUG "ieee80211_crypt: unregistered algorithm "
"'%s' (deinit)\n", alg->ops->name);
kfree(alg);
}
kfree(hcrypt);
}
EXPORT_SYMBOL(ieee80211_crypt_deinit_entries);
EXPORT_SYMBOL(ieee80211_crypt_deinit_handler);
EXPORT_SYMBOL(ieee80211_crypt_delayed_deinit);
EXPORT_SYMBOL(ieee80211_register_crypto_ops);
EXPORT_SYMBOL(ieee80211_unregister_crypto_ops);
EXPORT_SYMBOL(ieee80211_get_crypto_ops);
module_init(ieee80211_crypto_init);
module_exit(ieee80211_crypto_deinit);
net/ieee80211/ieee80211_crypt_ccmp.c 0 → 100644
浏览文件 @ b453872c
/*
* Host AP crypt: host-based CCMP encryption implementation for Host AP driver
*
* Copyright (c) 2003-2004, 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.
*/
#include <linux/config.h>
#include <linux/version.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/random.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/if_ether.h>
#include <linux/if_arp.h>
#include <asm/string.h>
#include <linux/wireless.h>
#include <net/ieee80211.h>
#include <linux/crypto.h>
#include <asm/scatterlist.h>
MODULE_AUTHOR("Jouni Malinen");
MODULE_DESCRIPTION("Host AP crypt: CCMP");
MODULE_LICENSE("GPL");
#define AES_BLOCK_LEN 16
#define CCMP_HDR_LEN 8
#define CCMP_MIC_LEN 8
#define CCMP_TK_LEN 16
#define CCMP_PN_LEN 6
struct ieee80211_ccmp_data {
u8 key[CCMP_TK_LEN];
int key_set;
u8 tx_pn[CCMP_PN_LEN];
u8 rx_pn[CCMP_PN_LEN];
u32 dot11RSNAStatsCCMPFormatErrors;
u32 dot11RSNAStatsCCMPReplays;
u32 dot11RSNAStatsCCMPDecryptErrors;
int key_idx;
struct crypto_tfm *tfm;
/* scratch buffers for virt_to_page() (crypto API) */
u8 tx_b0[AES_BLOCK_LEN], tx_b[AES_BLOCK_LEN],
tx_e[AES_BLOCK_LEN], tx_s0[AES_BLOCK_LEN];
u8 rx_b0[AES_BLOCK_LEN], rx_b[AES_BLOCK_LEN], rx_a[AES_BLOCK_LEN];
};
void ieee80211_ccmp_aes_encrypt(struct crypto_tfm *tfm,
const u8 pt[16], u8 ct[16])
{
struct scatterlist src, dst;
src.page = virt_to_page(pt);
src.offset = offset_in_page(pt);
src.length = AES_BLOCK_LEN;
dst.page = virt_to_page(ct);
dst.offset = offset_in_page(ct);
dst.length = AES_BLOCK_LEN;
crypto_cipher_encrypt(tfm, &dst, &src, AES_BLOCK_LEN);
}
static void * ieee80211_ccmp_init(int key_idx)
{
struct ieee80211_ccmp_data *priv;
priv = kmalloc(sizeof(*priv), GFP_ATOMIC);
if (priv == NULL)
goto fail;
memset(priv, 0, sizeof(*priv));
priv->key_idx = key_idx;
priv->tfm = crypto_alloc_tfm("aes", 0);
if (priv->tfm == NULL) {
printk(KERN_DEBUG "ieee80211_crypt_ccmp: could not allocate "
"crypto API aes\n");
goto fail;
}
return priv;
fail:
if (priv) {
if (priv->tfm)
crypto_free_tfm(priv->tfm);
kfree(priv);
}
return NULL;
}
static void ieee80211_ccmp_deinit(void *priv)
{
struct ieee80211_ccmp_data *_priv = priv;
if (_priv && _priv->tfm)
crypto_free_tfm(_priv->tfm);
kfree(priv);
}
static inline void xor_block(u8 *b, u8 *a, size_t len)
{
int i;
for (i = 0; i < len; i++)
b[i] ^= a[i];
}
static void ccmp_init_blocks(struct crypto_tfm *tfm,
struct ieee80211_hdr *hdr,
u8 *pn, size_t dlen, u8 *b0, u8 *auth,
u8 *s0)
{
u8 *pos, qc = 0;
size_t aad_len;
u16 fc;
int a4_included, qc_included;
u8 aad[2 * AES_BLOCK_LEN];
fc = le16_to_cpu(hdr->frame_ctl);
a4_included = ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS));
qc_included = ((WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA) &&
(WLAN_FC_GET_STYPE(fc) & 0x08));
aad_len = 22;
if (a4_included)
aad_len += 6;
if (qc_included) {
pos = (u8 *) &hdr->addr4;
if (a4_included)
pos += 6;
qc = *pos & 0x0f;
aad_len += 2;
}
/* CCM Initial Block:
* Flag (Include authentication header, M=3 (8-octet MIC),
* L=1 (2-octet Dlen))
* Nonce: 0x00 | A2 | PN
* Dlen */
b0[0] = 0x59;
b0[1] = qc;
memcpy(b0 + 2, hdr->addr2, ETH_ALEN);
memcpy(b0 + 8, pn, CCMP_PN_LEN);
b0[14] = (dlen >> 8) & 0xff;
b0[15] = dlen & 0xff;
/* AAD:
* FC with bits 4..6 and 11..13 masked to zero; 14 is always one
* A1 | A2 | A3
* SC with bits 4..15 (seq#) masked to zero
* A4 (if present)
* QC (if present)
*/
pos = (u8 *) hdr;
aad[0] = 0; /* aad_len >> 8 */
aad[1] = aad_len & 0xff;
aad[2] = pos[0] & 0x8f;
aad[3] = pos[1] & 0xc7;
memcpy(aad + 4, hdr->addr1, 3 * ETH_ALEN);
pos = (u8 *) &hdr->seq_ctl;
aad[22] = pos[0] & 0x0f;
aad[23] = 0; /* all bits masked */
memset(aad + 24, 0, 8);
if (a4_included)
memcpy(aad + 24, hdr->addr4, ETH_ALEN);
if (qc_included) {
aad[a4_included ? 30 : 24] = qc;
/* rest of QC masked */
}
/* Start with the first block and AAD */
ieee80211_ccmp_aes_encrypt(tfm, b0, auth);
xor_block(auth, aad, AES_BLOCK_LEN);
ieee80211_ccmp_aes_encrypt(tfm, auth, auth);
xor_block(auth, &aad[AES_BLOCK_LEN], AES_BLOCK_LEN);
ieee80211_ccmp_aes_encrypt(tfm, auth, auth);
b0[0] &= 0x07;
b0[14] = b0[15] = 0;
ieee80211_ccmp_aes_encrypt(tfm, b0, s0);
}
static int ieee80211_ccmp_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
{
struct ieee80211_ccmp_data *key = priv;
int data_len, i, blocks, last, len;
u8 *pos, *mic;
struct ieee80211_hdr *hdr;
u8 *b0 = key->tx_b0;
u8 *b = key->tx_b;
u8 *e = key->tx_e;
u8 *s0 = key->tx_s0;
if (skb_headroom(skb) < CCMP_HDR_LEN ||
skb_tailroom(skb) < CCMP_MIC_LEN ||
skb->len < hdr_len)
return -1;
data_len = skb->len - hdr_len;
pos = skb_push(skb, CCMP_HDR_LEN);
memmove(pos, pos + CCMP_HDR_LEN, hdr_len);
pos += hdr_len;
mic = skb_put(skb, CCMP_MIC_LEN);
i = CCMP_PN_LEN - 1;
while (i >= 0) {
key->tx_pn[i]++;
if (key->tx_pn[i] != 0)
break;
i--;
}
*pos++ = key->tx_pn[5];
*pos++ = key->tx_pn[4];
*pos++ = 0;
*pos++ = (key->key_idx << 6) | (1 << 5) /* Ext IV included */;
*pos++ = key->tx_pn[3];
*pos++ = key->tx_pn[2];
*pos++ = key->tx_pn[1];
*pos++ = key->tx_pn[0];
hdr = (struct ieee80211_hdr *) skb->data;
ccmp_init_blocks(key->tfm, hdr, key->tx_pn, data_len, b0, b, s0);
blocks = (data_len + AES_BLOCK_LEN - 1) / AES_BLOCK_LEN;
last = data_len % AES_BLOCK_LEN;
for (i = 1; i <= blocks; i++) {
len = (i == blocks && last) ? last : AES_BLOCK_LEN;
/* Authentication */
xor_block(b, pos, len);
ieee80211_ccmp_aes_encrypt(key->tfm, b, b);
/* Encryption, with counter */
b0[14] = (i >> 8) & 0xff;
b0[15] = i & 0xff;
ieee80211_ccmp_aes_encrypt(key->tfm, b0, e);
xor_block(pos, e, len);
pos += len;
}
for (i = 0; i < CCMP_MIC_LEN; i++)
mic[i] = b[i] ^ s0[i];
return 0;
}
static int ieee80211_ccmp_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
{
struct ieee80211_ccmp_data *key = priv;
u8 keyidx, *pos;
struct ieee80211_hdr *hdr;
u8 *b0 = key->rx_b0;
u8 *b = key->rx_b;
u8 *a = key->rx_a;
u8 pn[6];
int i, blocks, last, len;
size_t data_len = skb->len - hdr_len - CCMP_HDR_LEN - CCMP_MIC_LEN;
u8 *mic = skb->data + skb->len - CCMP_MIC_LEN;
if (skb->len < hdr_len + CCMP_HDR_LEN + CCMP_MIC_LEN) {
key->dot11RSNAStatsCCMPFormatErrors++;
return -1;
}
hdr = (struct ieee80211_hdr *) skb->data;
pos = skb->data + hdr_len;
keyidx = pos[3];
if (!(keyidx & (1 << 5))) {
if (net_ratelimit()) {
printk(KERN_DEBUG "CCMP: received packet without ExtIV"
" flag from " MAC_FMT "\n", MAC_ARG(hdr->addr2));
}
key->dot11RSNAStatsCCMPFormatErrors++;
return -2;
}
keyidx >>= 6;
if (key->key_idx != keyidx) {
printk(KERN_DEBUG "CCMP: RX tkey->key_idx=%d frame "
"keyidx=%d priv=%p\n", key->key_idx, keyidx, priv);
return -6;
}
if (!key->key_set) {
if (net_ratelimit()) {
printk(KERN_DEBUG "CCMP: received packet from " MAC_FMT
" with keyid=%d that does not have a configured"
" key\n", MAC_ARG(hdr->addr2), keyidx);
}
return -3;
}
pn[0] = pos[7];
pn[1] = pos[6];
pn[2] = pos[5];
pn[3] = pos[4];
pn[4] = pos[1];
pn[5] = pos[0];
pos += 8;
if (memcmp(pn, key->rx_pn, CCMP_PN_LEN) <= 0) {
if (net_ratelimit()) {
printk(KERN_DEBUG "CCMP: replay detected: STA=" MAC_FMT
" previous PN %02x%02x%02x%02x%02x%02x "
"received PN %02x%02x%02x%02x%02x%02x\n",
MAC_ARG(hdr->addr2), MAC_ARG(key->rx_pn),
MAC_ARG(pn));
}
key->dot11RSNAStatsCCMPReplays++;
return -4;
}
ccmp_init_blocks(key->tfm, hdr, pn, data_len, b0, a, b);
xor_block(mic, b, CCMP_MIC_LEN);
blocks = (data_len + AES_BLOCK_LEN - 1) / AES_BLOCK_LEN;
last = data_len % AES_BLOCK_LEN;
for (i = 1; i <= blocks; i++) {
len = (i == blocks && last) ? last : AES_BLOCK_LEN;
/* Decrypt, with counter */
b0[14] = (i >> 8) & 0xff;
b0[15] = i & 0xff;
ieee80211_ccmp_aes_encrypt(key->tfm, b0, b);
xor_block(pos, b, len);
/* Authentication */
xor_block(a, pos, len);
ieee80211_ccmp_aes_encrypt(key->tfm, a, a);
pos += len;
}
if (memcmp(mic, a, CCMP_MIC_LEN) != 0) {
if (net_ratelimit()) {
printk(KERN_DEBUG "CCMP: decrypt failed: STA="
MAC_FMT "\n", MAC_ARG(hdr->addr2));
}
key->dot11RSNAStatsCCMPDecryptErrors++;
return -5;
}
memcpy(key->rx_pn, pn, CCMP_PN_LEN);
/* Remove hdr and MIC */
memmove(skb->data + CCMP_HDR_LEN, skb->data, hdr_len);
skb_pull(skb, CCMP_HDR_LEN);
skb_trim(skb, skb->len - CCMP_MIC_LEN);
return keyidx;
}
static int ieee80211_ccmp_set_key(void *key, int len, u8 *seq, void *priv)
{
struct ieee80211_ccmp_data *data = priv;
int keyidx;
struct crypto_tfm *tfm = data->tfm;
keyidx = data->key_idx;
memset(data, 0, sizeof(*data));
data->key_idx = keyidx;
data->tfm = tfm;
if (len == CCMP_TK_LEN) {
memcpy(data->key, key, CCMP_TK_LEN);
data->key_set = 1;
if (seq) {
data->rx_pn[0] = seq[5];
data->rx_pn[1] = seq[4];
data->rx_pn[2] = seq[3];
data->rx_pn[3] = seq[2];
data->rx_pn[4] = seq[1];
data->rx_pn[5] = seq[0];
}
crypto_cipher_setkey(data->tfm, data->key, CCMP_TK_LEN);
} else if (len == 0)
data->key_set = 0;
else
return -1;
return 0;
}
static int ieee80211_ccmp_get_key(void *key, int len, u8 *seq, void *priv)
{
struct ieee80211_ccmp_data *data = priv;
if (len < CCMP_TK_LEN)
return -1;
if (!data->key_set)
return 0;
memcpy(key, data->key, CCMP_TK_LEN);
if (seq) {
seq[0] = data->tx_pn[5];
seq[1] = data->tx_pn[4];
seq[2] = data->tx_pn[3];
seq[3] = data->tx_pn[2];
seq[4] = data->tx_pn[1];
seq[5] = data->tx_pn[0];
}
return CCMP_TK_LEN;
}
static char * ieee80211_ccmp_print_stats(char *p, void *priv)
{
struct ieee80211_ccmp_data *ccmp = priv;
p += sprintf(p, "key[%d] alg=CCMP key_set=%d "
"tx_pn=%02x%02x%02x%02x%02x%02x "
"rx_pn=%02x%02x%02x%02x%02x%02x "
"format_errors=%d replays=%d decrypt_errors=%d\n",
ccmp->key_idx, ccmp->key_set,
MAC_ARG(ccmp->tx_pn), MAC_ARG(ccmp->rx_pn),
ccmp->dot11RSNAStatsCCMPFormatErrors,
ccmp->dot11RSNAStatsCCMPReplays,
ccmp->dot11RSNAStatsCCMPDecryptErrors);
return p;
}
static struct ieee80211_crypto_ops ieee80211_crypt_ccmp = {
.name = "CCMP",
.init = ieee80211_ccmp_init,
.deinit = ieee80211_ccmp_deinit,
.encrypt_mpdu = ieee80211_ccmp_encrypt,
.decrypt_mpdu = ieee80211_ccmp_decrypt,
.encrypt_msdu = NULL,
.decrypt_msdu = NULL,
.set_key = ieee80211_ccmp_set_key,
.get_key = ieee80211_ccmp_get_key,
.print_stats = ieee80211_ccmp_print_stats,
.extra_prefix_len = CCMP_HDR_LEN,
.extra_postfix_len = CCMP_MIC_LEN,
.owner = THIS_MODULE,
};
static int __init ieee80211_crypto_ccmp_init(void)
{
return ieee80211_register_crypto_ops(&ieee80211_crypt_ccmp);
}
static void __exit ieee80211_crypto_ccmp_exit(void)
{
ieee80211_unregister_crypto_ops(&ieee80211_crypt_ccmp);
}
module_init(ieee80211_crypto_ccmp_init);
module_exit(ieee80211_crypto_ccmp_exit);
net/ieee80211/ieee80211_crypt_tkip.c 0 → 100644
浏览文件 @ b453872c
/*
* Host AP crypt: host-based TKIP encryption implementation for Host AP driver
*
* Copyright (c) 2003-2004, 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.
*/
#include <linux/config.h>
#include <linux/version.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/random.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/if_ether.h>
#include <linux/if_arp.h>
#include <asm/string.h>
#include <net/ieee80211.h>
#include <linux/crypto.h>
#include <asm/scatterlist.h>
#include <linux/crc32.h>
MODULE_AUTHOR("Jouni Malinen");
MODULE_DESCRIPTION("Host AP crypt: TKIP");
MODULE_LICENSE("GPL");
struct ieee80211_tkip_data {
#define TKIP_KEY_LEN 32
u8 key[TKIP_KEY_LEN];
int key_set;
u32 tx_iv32;
u16 tx_iv16;
u16 tx_ttak[5];
int tx_phase1_done;
u32 rx_iv32;
u16 rx_iv16;
u16 rx_ttak[5];
int rx_phase1_done;
u32 rx_iv32_new;
u16 rx_iv16_new;
u32 dot11RSNAStatsTKIPReplays;
u32 dot11RSNAStatsTKIPICVErrors;
u32 dot11RSNAStatsTKIPLocalMICFailures;
int key_idx;
struct crypto_tfm *tfm_arc4;
struct crypto_tfm *tfm_michael;
/* scratch buffers for virt_to_page() (crypto API) */
u8 rx_hdr[16], tx_hdr[16];
};
static void * ieee80211_tkip_init(int key_idx)
{
struct ieee80211_tkip_data *priv;
priv = kmalloc(sizeof(*priv), GFP_ATOMIC);
if (priv == NULL)
goto fail;
memset(priv, 0, sizeof(*priv));
priv->key_idx = key_idx;
priv->tfm_arc4 = crypto_alloc_tfm("arc4", 0);
if (priv->tfm_arc4 == NULL) {
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
"crypto API arc4\n");
goto fail;
}
priv->tfm_michael = crypto_alloc_tfm("michael_mic", 0);
if (priv->tfm_michael == NULL) {
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
"crypto API michael_mic\n");
goto fail;
}
return priv;
fail:
if (priv) {
if (priv->tfm_michael)
crypto_free_tfm(priv->tfm_michael);
if (priv->tfm_arc4)
crypto_free_tfm(priv->tfm_arc4);
kfree(priv);
}
return NULL;
}
static void ieee80211_tkip_deinit(void *priv)
{
struct ieee80211_tkip_data *_priv = priv;
if (_priv && _priv->tfm_michael)
crypto_free_tfm(_priv->tfm_michael);
if (_priv && _priv->tfm_arc4)
crypto_free_tfm(_priv->tfm_arc4);
kfree(priv);
}
static inline u16 RotR1(u16 val)
{
return (val >> 1) | (val << 15);
}
static inline u8 Lo8(u16 val)
{
return val & 0xff;
}
static inline u8 Hi8(u16 val)
{
return val >> 8;
}
static inline u16 Lo16(u32 val)
{
return val & 0xffff;
}
static inline u16 Hi16(u32 val)
{
return val >> 16;
}
static inline u16 Mk16(u8 hi, u8 lo)
{
return lo | (((u16) hi) << 8);
}
static inline u16 Mk16_le(u16 *v)
{
return le16_to_cpu(*v);
}
static const u16 Sbox[256] =
{
0xC6A5, 0xF884, 0xEE99, 0xF68D, 0xFF0D, 0xD6BD, 0xDEB1, 0x9154,
0x6050, 0x0203, 0xCEA9, 0x567D, 0xE719, 0xB562, 0x4DE6, 0xEC9A,
0x8F45, 0x1F9D, 0x8940, 0xFA87, 0xEF15, 0xB2EB, 0x8EC9, 0xFB0B,
0x41EC, 0xB367, 0x5FFD, 0x45EA, 0x23BF, 0x53F7, 0xE496, 0x9B5B,
0x75C2, 0xE11C, 0x3DAE, 0x4C6A, 0x6C5A, 0x7E41, 0xF502, 0x834F,
0x685C, 0x51F4, 0xD134, 0xF908, 0xE293, 0xAB73, 0x6253, 0x2A3F,
0x080C, 0x9552, 0x4665, 0x9D5E, 0x3028, 0x37A1, 0x0A0F, 0x2FB5,
0x0E09, 0x2436, 0x1B9B, 0xDF3D, 0xCD26, 0x4E69, 0x7FCD, 0xEA9F,
0x121B, 0x1D9E, 0x5874, 0x342E, 0x362D, 0xDCB2, 0xB4EE, 0x5BFB,
0xA4F6, 0x764D, 0xB761, 0x7DCE, 0x527B, 0xDD3E, 0x5E71, 0x1397,
0xA6F5, 0xB968, 0x0000, 0xC12C, 0x4060, 0xE31F, 0x79C8, 0xB6ED,
0xD4BE, 0x8D46, 0x67D9, 0x724B, 0x94DE, 0x98D4, 0xB0E8, 0x854A,
0xBB6B, 0xC52A, 0x4FE5, 0xED16, 0x86C5, 0x9AD7, 0x6655, 0x1194,
0x8ACF, 0xE910, 0x0406, 0xFE81, 0xA0F0, 0x7844, 0x25BA, 0x4BE3,
0xA2F3, 0x5DFE, 0x80C0, 0x058A, 0x3FAD, 0x21BC, 0x7048, 0xF104,
0x63DF, 0x77C1, 0xAF75, 0x4263, 0x2030, 0xE51A, 0xFD0E, 0xBF6D,
0x814C, 0x1814, 0x2635, 0xC32F, 0xBEE1, 0x35A2, 0x88CC, 0x2E39,
0x9357, 0x55F2, 0xFC82, 0x7A47, 0xC8AC, 0xBAE7, 0x322B, 0xE695,
0xC0A0, 0x1998, 0x9ED1, 0xA37F, 0x4466, 0x547E, 0x3BAB, 0x0B83,
0x8CCA, 0xC729, 0x6BD3, 0x283C, 0xA779, 0xBCE2, 0x161D, 0xAD76,
0xDB3B, 0x6456, 0x744E, 0x141E, 0x92DB, 0x0C0A, 0x486C, 0xB8E4,
0x9F5D, 0xBD6E, 0x43EF, 0xC4A6, 0x39A8, 0x31A4, 0xD337, 0xF28B,
0xD532, 0x8B43, 0x6E59, 0xDAB7, 0x018C, 0xB164, 0x9CD2, 0x49E0,
0xD8B4, 0xACFA, 0xF307, 0xCF25, 0xCAAF, 0xF48E, 0x47E9, 0x1018,
0x6FD5, 0xF088, 0x4A6F, 0x5C72, 0x3824, 0x57F1, 0x73C7, 0x9751,
0xCB23, 0xA17C, 0xE89C, 0x3E21, 0x96DD, 0x61DC, 0x0D86, 0x0F85,
0xE090, 0x7C42, 0x71C4, 0xCCAA, 0x90D8, 0x0605, 0xF701, 0x1C12,
0xC2A3, 0x6A5F, 0xAEF9, 0x69D0, 0x1791, 0x9958, 0x3A27, 0x27B9,
0xD938, 0xEB13, 0x2BB3, 0x2233, 0xD2BB, 0xA970, 0x0789, 0x33A7,
0x2DB6, 0x3C22, 0x1592, 0xC920, 0x8749, 0xAAFF, 0x5078, 0xA57A,
0x038F, 0x59F8, 0x0980, 0x1A17, 0x65DA, 0xD731, 0x84C6, 0xD0B8,
0x82C3, 0x29B0, 0x5A77, 0x1E11, 0x7BCB, 0xA8FC, 0x6DD6, 0x2C3A,
};
static inline u16 _S_(u16 v)
{
u16 t = Sbox[Hi8(v)];
return Sbox[Lo8(v)] ^ ((t << 8) | (t >> 8));
}
#define PHASE1_LOOP_COUNT 8
static void tkip_mixing_phase1(u16 *TTAK, const u8 *TK, const u8 *TA, u32 IV32)
{
int i, j;
/* Initialize the 80-bit TTAK from TSC (IV32) and TA[0..5] */
TTAK[0] = Lo16(IV32);
TTAK[1] = Hi16(IV32);
TTAK[2] = Mk16(TA[1], TA[0]);
TTAK[3] = Mk16(TA[3], TA[2]);
TTAK[4] = Mk16(TA[5], TA[4]);
for (i = 0; i < PHASE1_LOOP_COUNT; i++) {
j = 2 * (i & 1);
TTAK[0] += _S_(TTAK[4] ^ Mk16(TK[1 + j], TK[0 + j]));
TTAK[1] += _S_(TTAK[0] ^ Mk16(TK[5 + j], TK[4 + j]));
TTAK[2] += _S_(TTAK[1] ^ Mk16(TK[9 + j], TK[8 + j]));
TTAK[3] += _S_(TTAK[2] ^ Mk16(TK[13 + j], TK[12 + j]));
TTAK[4] += _S_(TTAK[3] ^ Mk16(TK[1 + j], TK[0 + j])) + i;
}
}
static void tkip_mixing_phase2(u8 *WEPSeed, const u8 *TK, const u16 *TTAK,
u16 IV16)
{
/* Make temporary area overlap WEP seed so that the final copy can be
* avoided on little endian hosts. */
u16 *PPK = (u16 *) &WEPSeed[4];
/* Step 1 - make copy of TTAK and bring in TSC */
PPK[0] = TTAK[0];
PPK[1] = TTAK[1];
PPK[2] = TTAK[2];
PPK[3] = TTAK[3];
PPK[4] = TTAK[4];
PPK[5] = TTAK[4] + IV16;
/* Step 2 - 96-bit bijective mixing using S-box */
PPK[0] += _S_(PPK[5] ^ Mk16_le((u16 *) &TK[0]));
PPK[1] += _S_(PPK[0] ^ Mk16_le((u16 *) &TK[2]));
PPK[2] += _S_(PPK[1] ^ Mk16_le((u16 *) &TK[4]));
PPK[3] += _S_(PPK[2] ^ Mk16_le((u16 *) &TK[6]));
PPK[4] += _S_(PPK[3] ^ Mk16_le((u16 *) &TK[8]));
PPK[5] += _S_(PPK[4] ^ Mk16_le((u16 *) &TK[10]));
PPK[0] += RotR1(PPK[5] ^ Mk16_le((u16 *) &TK[12]));
PPK[1] += RotR1(PPK[0] ^ Mk16_le((u16 *) &TK[14]));
PPK[2] += RotR1(PPK[1]);
PPK[3] += RotR1(PPK[2]);
PPK[4] += RotR1(PPK[3]);
PPK[5] += RotR1(PPK[4]);
/* Step 3 - bring in last of TK bits, assign 24-bit WEP IV value
* WEPSeed[0..2] is transmitted as WEP IV */
WEPSeed[0] = Hi8(IV16);
WEPSeed[1] = (Hi8(IV16) | 0x20) & 0x7F;
WEPSeed[2] = Lo8(IV16);
WEPSeed[3] = Lo8((PPK[5] ^ Mk16_le((u16 *) &TK[0])) >> 1);
#ifdef __BIG_ENDIAN
{
int i;
for (i = 0; i < 6; i++)
PPK[i] = (PPK[i] << 8) | (PPK[i] >> 8);
}
#endif
}
static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
{
struct ieee80211_tkip_data *tkey = priv;
int len;
u8 rc4key[16], *pos, *icv;
struct ieee80211_hdr *hdr;
u32 crc;
struct scatterlist sg;
if (skb_headroom(skb) < 8 || skb_tailroom(skb) < 4 ||
skb->len < hdr_len)
return -1;
hdr = (struct ieee80211_hdr *) skb->data;
if (!tkey->tx_phase1_done) {
tkip_mixing_phase1(tkey->tx_ttak, tkey->key, hdr->addr2,
tkey->tx_iv32);
tkey->tx_phase1_done = 1;
}
tkip_mixing_phase2(rc4key, tkey->key, tkey->tx_ttak, tkey->tx_iv16);
len = skb->len - hdr_len;
pos = skb_push(skb, 8);
memmove(pos, pos + 8, hdr_len);
pos += hdr_len;
icv = skb_put(skb, 4);
*pos++ = rc4key[0];
*pos++ = rc4key[1];
*pos++ = rc4key[2];
*pos++ = (tkey->key_idx << 6) | (1 << 5) /* Ext IV included */;
*pos++ = tkey->tx_iv32 & 0xff;
*pos++ = (tkey->tx_iv32 >> 8) & 0xff;
*pos++ = (tkey->tx_iv32 >> 16) & 0xff;
*pos++ = (tkey->tx_iv32 >> 24) & 0xff;
crc = ~crc32_le(~0, pos, len);
icv[0] = crc;
icv[1] = crc >> 8;
icv[2] = crc >> 16;
icv[3] = crc >> 24;
crypto_cipher_setkey(tkey->tfm_arc4, rc4key, 16);
sg.page = virt_to_page(pos);
sg.offset = offset_in_page(pos);
sg.length = len + 4;
crypto_cipher_encrypt(tkey->tfm_arc4, &sg, &sg, len + 4);
tkey->tx_iv16++;
if (tkey->tx_iv16 == 0) {
tkey->tx_phase1_done = 0;
tkey->tx_iv32++;
}
return 0;
}
static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
{
struct ieee80211_tkip_data *tkey = priv;
u8 rc4key[16];
u8 keyidx, *pos;
u32 iv32;
u16 iv16;
struct ieee80211_hdr *hdr;
u8 icv[4];
u32 crc;
struct scatterlist sg;
int plen;
if (skb->len < hdr_len + 8 + 4)
return -1;
hdr = (struct ieee80211_hdr *) skb->data;
pos = skb->data + hdr_len;
keyidx = pos[3];
if (!(keyidx & (1 << 5))) {
if (net_ratelimit()) {
printk(KERN_DEBUG "TKIP: received packet without ExtIV"
" flag from " MAC_FMT "\n", MAC_ARG(hdr->addr2));
}
return -2;
}
keyidx >>= 6;
if (tkey->key_idx != keyidx) {
printk(KERN_DEBUG "TKIP: RX tkey->key_idx=%d frame "
"keyidx=%d priv=%p\n", tkey->key_idx, keyidx, priv);
return -6;
}
if (!tkey->key_set) {
if (net_ratelimit()) {
printk(KERN_DEBUG "TKIP: received packet from " MAC_FMT
" with keyid=%d that does not have a configured"
" key\n", MAC_ARG(hdr->addr2), keyidx);
}
return -3;
}
iv16 = (pos[0] << 8) | pos[2];
iv32 = pos[4] | (pos[5] << 8) | (pos[6] << 16) | (pos[7] << 24);
pos += 8;
if (iv32 < tkey->rx_iv32 ||
(iv32 == tkey->rx_iv32 && iv16 <= tkey->rx_iv16)) {
if (net_ratelimit()) {
printk(KERN_DEBUG "TKIP: replay detected: STA=" MAC_FMT
" previous TSC %08x%04x received TSC "
"%08x%04x\n", MAC_ARG(hdr->addr2),
tkey->rx_iv32, tkey->rx_iv16, iv32, iv16);
}
tkey->dot11RSNAStatsTKIPReplays++;
return -4;
}
if (iv32 != tkey->rx_iv32 || !tkey->rx_phase1_done) {
tkip_mixing_phase1(tkey->rx_ttak, tkey->key, hdr->addr2, iv32);
tkey->rx_phase1_done = 1;
}
tkip_mixing_phase2(rc4key, tkey->key, tkey->rx_ttak, iv16);
plen = skb->len - hdr_len - 12;
crypto_cipher_setkey(tkey->tfm_arc4, rc4key, 16);
sg.page = virt_to_page(pos);
sg.offset = offset_in_page(pos);
sg.length = plen + 4;
crypto_cipher_decrypt(tkey->tfm_arc4, &sg, &sg, plen + 4);
crc = ~crc32_le(~0, pos, plen);
icv[0] = crc;
icv[1] = crc >> 8;
icv[2] = crc >> 16;
icv[3] = crc >> 24;
if (memcmp(icv, pos + plen, 4) != 0) {
if (iv32 != tkey->rx_iv32) {
/* Previously cached Phase1 result was already lost, so
* it needs to be recalculated for the next packet. */
tkey->rx_phase1_done = 0;
}
if (net_ratelimit()) {
printk(KERN_DEBUG "TKIP: ICV error detected: STA="
MAC_FMT "\n", MAC_ARG(hdr->addr2));
}
tkey->dot11RSNAStatsTKIPICVErrors++;
return -5;
}
/* Update real counters only after Michael MIC verification has
* completed */
tkey->rx_iv32_new = iv32;
tkey->rx_iv16_new = iv16;
/* Remove IV and ICV */
memmove(skb->data + 8, skb->data, hdr_len);
skb_pull(skb, 8);
skb_trim(skb, skb->len - 4);
return keyidx;
}
static int michael_mic(struct ieee80211_tkip_data *tkey, u8 *key, u8 *hdr,
u8 *data, size_t data_len, u8 *mic)
{
struct scatterlist sg[2];
if (tkey->tfm_michael == NULL) {
printk(KERN_WARNING "michael_mic: tfm_michael == NULL\n");
return -1;
}
sg[0].page = virt_to_page(hdr);
sg[0].offset = offset_in_page(hdr);
sg[0].length = 16;
sg[1].page = virt_to_page(data);
sg[1].offset = offset_in_page(data);
sg[1].length = data_len;
crypto_digest_init(tkey->tfm_michael);
crypto_digest_setkey(tkey->tfm_michael, key, 8);
crypto_digest_update(tkey->tfm_michael, sg, 2);
crypto_digest_final(tkey->tfm_michael, mic);
return 0;
}
static void michael_mic_hdr(struct sk_buff *skb, u8 *hdr)
{
struct ieee80211_hdr *hdr11;
hdr11 = (struct ieee80211_hdr *) skb->data;
switch (le16_to_cpu(hdr11->frame_ctl) &
(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
case IEEE80211_FCTL_TODS:
memcpy(hdr, hdr11->addr3, ETH_ALEN); /* DA */
memcpy(hdr + ETH_ALEN, hdr11->addr2, ETH_ALEN); /* SA */
break;
case IEEE80211_FCTL_FROMDS:
memcpy(hdr, hdr11->addr1, ETH_ALEN); /* DA */
memcpy(hdr + ETH_ALEN, hdr11->addr3, ETH_ALEN); /* SA */
break;
case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
memcpy(hdr, hdr11->addr3, ETH_ALEN); /* DA */
memcpy(hdr + ETH_ALEN, hdr11->addr4, ETH_ALEN); /* SA */
break;
case 0:
memcpy(hdr, hdr11->addr1, ETH_ALEN); /* DA */
memcpy(hdr + ETH_ALEN, hdr11->addr2, ETH_ALEN); /* SA */
break;
}
hdr[12] = 0; /* priority */
hdr[13] = hdr[14] = hdr[15] = 0; /* reserved */
}
static int ieee80211_michael_mic_add(struct sk_buff *skb, int hdr_len, void *priv)
{
struct ieee80211_tkip_data *tkey = priv;
u8 *pos;
if (skb_tailroom(skb) < 8 || skb->len < hdr_len) {
printk(KERN_DEBUG "Invalid packet for Michael MIC add "
"(tailroom=%d hdr_len=%d skb->len=%d)\n",
skb_tailroom(skb), hdr_len, skb->len);
return -1;
}
michael_mic_hdr(skb, tkey->tx_hdr);
pos = skb_put(skb, 8);
if (michael_mic(tkey, &tkey->key[16], tkey->tx_hdr,
skb->data + hdr_len, skb->len - 8 - hdr_len, pos))
return -1;
return 0;
}
#if WIRELESS_EXT >= 18
static void ieee80211_michael_mic_failure(struct net_device *dev,
struct ieee80211_hdr *hdr,
int keyidx)
{
union iwreq_data wrqu;
struct iw_michaelmicfailure ev;
/* TODO: needed parameters: count, keyid, key type, TSC */
memset(&ev, 0, sizeof(ev));
ev.flags = keyidx & IW_MICFAILURE_KEY_ID;
if (hdr->addr1[0] & 0x01)
ev.flags |= IW_MICFAILURE_GROUP;
else
ev.flags |= IW_MICFAILURE_PAIRWISE;
ev.src_addr.sa_family = ARPHRD_ETHER;
memcpy(ev.src_addr.sa_data, hdr->addr2, ETH_ALEN);
memset(&wrqu, 0, sizeof(wrqu));
wrqu.data.length = sizeof(ev);
wireless_send_event(dev, IWEVMICHAELMICFAILURE, &wrqu, (char *) &ev);
}
#elif WIRELESS_EXT >= 15
static void ieee80211_michael_mic_failure(struct net_device *dev,
struct ieee80211_hdr *hdr,
int keyidx)
{
union iwreq_data wrqu;
char buf[128];
/* TODO: needed parameters: count, keyid, key type, TSC */
sprintf(buf, "MLME-MICHAELMICFAILURE.indication(keyid=%d %scast addr="
MAC_FMT ")", keyidx, hdr->addr1[0] & 0x01 ? "broad" : "uni",
MAC_ARG(hdr->addr2));
memset(&wrqu, 0, sizeof(wrqu));
wrqu.data.length = strlen(buf);
wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
}
#else /* WIRELESS_EXT >= 15 */
static inline void ieee80211_michael_mic_failure(struct net_device *dev,
struct ieee80211_hdr *hdr,
int keyidx)
{
}
#endif /* WIRELESS_EXT >= 15 */
static int ieee80211_michael_mic_verify(struct sk_buff *skb, int keyidx,
int hdr_len, void *priv)
{
struct ieee80211_tkip_data *tkey = priv;
u8 mic[8];
if (!tkey->key_set)
return -1;
michael_mic_hdr(skb, tkey->rx_hdr);
if (michael_mic(tkey, &tkey->key[24], tkey->rx_hdr,
skb->data + hdr_len, skb->len - 8 - hdr_len, mic))
return -1;
if (memcmp(mic, skb->data + skb->len - 8, 8) != 0) {
struct ieee80211_hdr *hdr;
hdr = (struct ieee80211_hdr *) skb->data;
printk(KERN_DEBUG "%s: Michael MIC verification failed for "
"MSDU from " MAC_FMT " keyidx=%d\n",
skb->dev ? skb->dev->name : "N/A", MAC_ARG(hdr->addr2),
keyidx);
if (skb->dev)
ieee80211_michael_mic_failure(skb->dev, hdr, keyidx);
tkey->dot11RSNAStatsTKIPLocalMICFailures++;
return -1;
}
/* Update TSC counters for RX now that the packet verification has
* completed. */
tkey->rx_iv32 = tkey->rx_iv32_new;
tkey->rx_iv16 = tkey->rx_iv16_new;
skb_trim(skb, skb->len - 8);
return 0;
}
static int ieee80211_tkip_set_key(void *key, int len, u8 *seq, void *priv)
{
struct ieee80211_tkip_data *tkey = priv;
int keyidx;
struct crypto_tfm *tfm = tkey->tfm_michael;
struct crypto_tfm *tfm2 = tkey->tfm_arc4;
keyidx = tkey->key_idx;
memset(tkey, 0, sizeof(*tkey));
tkey->key_idx = keyidx;
tkey->tfm_michael = tfm;
tkey->tfm_arc4 = tfm2;
if (len == TKIP_KEY_LEN) {
memcpy(tkey->key, key, TKIP_KEY_LEN);
tkey->key_set = 1;
tkey->tx_iv16 = 1; /* TSC is initialized to 1 */
if (seq) {
tkey->rx_iv32 = (seq[5] << 24) | (seq[4] << 16) |
(seq[3] << 8) | seq[2];
tkey->rx_iv16 = (seq[1] << 8) | seq[0];
}
} else if (len == 0)
tkey->key_set = 0;
else
return -1;
return 0;
}
static int ieee80211_tkip_get_key(void *key, int len, u8 *seq, void *priv)
{
struct ieee80211_tkip_data *tkey = priv;
if (len < TKIP_KEY_LEN)
return -1;
if (!tkey->key_set)
return 0;
memcpy(key, tkey->key, TKIP_KEY_LEN);
if (seq) {
/* Return the sequence number of the last transmitted frame. */
u16 iv16 = tkey->tx_iv16;
u32 iv32 = tkey->tx_iv32;
if (iv16 == 0)
iv32--;
iv16--;
seq[0] = tkey->tx_iv16;
seq[1] = tkey->tx_iv16 >> 8;
seq[2] = tkey->tx_iv32;
seq[3] = tkey->tx_iv32 >> 8;
seq[4] = tkey->tx_iv32 >> 16;
seq[5] = tkey->tx_iv32 >> 24;
}
return TKIP_KEY_LEN;
}
static char * ieee80211_tkip_print_stats(char *p, void *priv)
{
struct ieee80211_tkip_data *tkip = priv;
p += sprintf(p, "key[%d] alg=TKIP key_set=%d "
"tx_pn=%02x%02x%02x%02x%02x%02x "
"rx_pn=%02x%02x%02x%02x%02x%02x "
"replays=%d icv_errors=%d local_mic_failures=%d\n",
tkip->key_idx, tkip->key_set,
(tkip->tx_iv32 >> 24) & 0xff,
(tkip->tx_iv32 >> 16) & 0xff,
(tkip->tx_iv32 >> 8) & 0xff,
tkip->tx_iv32 & 0xff,
(tkip->tx_iv16 >> 8) & 0xff,
tkip->tx_iv16 & 0xff,
(tkip->rx_iv32 >> 24) & 0xff,
(tkip->rx_iv32 >> 16) & 0xff,
(tkip->rx_iv32 >> 8) & 0xff,
tkip->rx_iv32 & 0xff,
(tkip->rx_iv16 >> 8) & 0xff,
tkip->rx_iv16 & 0xff,
tkip->dot11RSNAStatsTKIPReplays,
tkip->dot11RSNAStatsTKIPICVErrors,
tkip->dot11RSNAStatsTKIPLocalMICFailures);
return p;
}
static struct ieee80211_crypto_ops ieee80211_crypt_tkip = {
.name = "TKIP",
.init = ieee80211_tkip_init,
.deinit = ieee80211_tkip_deinit,
.encrypt_mpdu = ieee80211_tkip_encrypt,
.decrypt_mpdu = ieee80211_tkip_decrypt,
.encrypt_msdu = ieee80211_michael_mic_add,
.decrypt_msdu = ieee80211_michael_mic_verify,
.set_key = ieee80211_tkip_set_key,
.get_key = ieee80211_tkip_get_key,
.print_stats = ieee80211_tkip_print_stats,
.extra_prefix_len = 4 + 4, /* IV + ExtIV */
.extra_postfix_len = 8 + 4, /* MIC + ICV */
.owner = THIS_MODULE,
};
static int __init ieee80211_crypto_tkip_init(void)
{
return ieee80211_register_crypto_ops(&ieee80211_crypt_tkip);
}
static void __exit ieee80211_crypto_tkip_exit(void)
{
ieee80211_unregister_crypto_ops(&ieee80211_crypt_tkip);
}
module_init(ieee80211_crypto_tkip_init);
module_exit(ieee80211_crypto_tkip_exit);
net/ieee80211/ieee80211_crypt_wep.c 0 → 100644
浏览文件 @ b453872c
/*
* Host AP crypt: host-based WEP encryption implementation for Host AP driver
*
* Copyright (c) 2002-2004, 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.
*/
#include <linux/config.h>
#include <linux/version.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/random.h>
#include <linux/skbuff.h>
#include <asm/string.h>
#include <net/ieee80211.h>
#include <linux/crypto.h>
#include <asm/scatterlist.h>
#include <linux/crc32.h>
MODULE_AUTHOR("Jouni Malinen");
MODULE_DESCRIPTION("Host AP crypt: WEP");
MODULE_LICENSE("GPL");
struct prism2_wep_data {
u32 iv;
#define WEP_KEY_LEN 13
u8 key[WEP_KEY_LEN + 1];
u8 key_len;
u8 key_idx;
struct crypto_tfm *tfm;
};
static void * prism2_wep_init(int keyidx)
{
struct prism2_wep_data *priv;
priv = kmalloc(sizeof(*priv), GFP_ATOMIC);
if (priv == NULL)
goto fail;
memset(priv, 0, sizeof(*priv));
priv->key_idx = keyidx;
priv->tfm = crypto_alloc_tfm("arc4", 0);
if (priv->tfm == NULL) {
printk(KERN_DEBUG "ieee80211_crypt_wep: could not allocate "
"crypto API arc4\n");
goto fail;
}
/* start WEP IV from a random value */
get_random_bytes(&priv->iv, 4);
return priv;
fail:
if (priv) {
if (priv->tfm)
crypto_free_tfm(priv->tfm);
kfree(priv);
}
return NULL;
}
static void prism2_wep_deinit(void *priv)
{
struct prism2_wep_data *_priv = priv;
if (_priv && _priv->tfm)
crypto_free_tfm(_priv->tfm);
kfree(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)
{
struct prism2_wep_data *wep = priv;
u32 crc, klen, len;
u8 key[WEP_KEY_LEN + 3];
u8 *pos, *icv;
struct scatterlist sg;
if (skb_headroom(skb) < 4 || skb_tailroom(skb) < 4 ||
skb->len < hdr_len)
return -1;
len = skb->len - hdr_len;
pos = skb_push(skb, 4);
memmove(pos, pos + 4, hdr_len);
pos += hdr_len;
klen = 3 + wep->key_len;
wep->iv++;
/* Fluhrer, Mantin, and Shamir have reported weaknesses in the key
* scheduling algorithm of RC4. At least IVs (KeyByte + 3, 0xff, N)
* can be used to speedup attacks, so avoid using them. */
if ((wep->iv & 0xff00) == 0xff00) {
u8 B = (wep->iv >> 16) & 0xff;
if (B >= 3 && B < klen)
wep->iv += 0x0100;
}
/* Prepend 24-bit IV to RC4 key and TX frame */
*pos++ = key[0] = (wep->iv >> 16) & 0xff;
*pos++ = key[1] = (wep->iv >> 8) & 0xff;
*pos++ = key[2] = wep->iv & 0xff;
*pos++ = wep->key_idx << 6;
/* Copy rest of the WEP key (the secret part) */
memcpy(key + 3, wep->key, wep->key_len);
/* Append little-endian CRC32 and encrypt it to produce ICV */
crc = ~crc32_le(~0, pos, len);
icv = skb_put(skb, 4);
icv[0] = crc;
icv[1] = crc >> 8;
icv[2] = crc >> 16;
icv[3] = crc >> 24;
crypto_cipher_setkey(wep->tfm, key, klen);
sg.page = virt_to_page(pos);
sg.offset = offset_in_page(pos);
sg.length = len + 4;
crypto_cipher_encrypt(wep->tfm, &sg, &sg, len + 4);
return 0;
}
/* Perform WEP decryption on given 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)
{
struct prism2_wep_data *wep = priv;
u32 crc, klen, plen;
u8 key[WEP_KEY_LEN + 3];
u8 keyidx, *pos, icv[4];
struct scatterlist sg;
if (skb->len < hdr_len + 8)
return -1;
pos = skb->data + hdr_len;
key[0] = *pos++;
key[1] = *pos++;
key[2] = *pos++;
keyidx = *pos++ >> 6;
if (keyidx != wep->key_idx)
return -1;
klen = 3 + wep->key_len;
/* Copy rest of the WEP key (the secret part) */
memcpy(key + 3, wep->key, wep->key_len);
/* Apply RC4 to data and compute CRC32 over decrypted data */
plen = skb->len - hdr_len - 8;
crypto_cipher_setkey(wep->tfm, key, klen);
sg.page = virt_to_page(pos);
sg.offset = offset_in_page(pos);
sg.length = plen + 4;
crypto_cipher_decrypt(wep->tfm, &sg, &sg, plen + 4);
crc = ~crc32_le(~0, pos, plen);
icv[0] = crc;
icv[1] = crc >> 8;
icv[2] = crc >> 16;
icv[3] = crc >> 24;
if (memcmp(icv, pos + plen, 4) != 0) {
/* ICV mismatch - drop frame */
return -2;
}
/* Remove IV and ICV */
memmove(skb->data + 4, skb->data, hdr_len);
skb_pull(skb, 4);
skb_trim(skb, skb->len - 4);
return 0;
}
static int prism2_wep_set_key(void *key, int len, u8 *seq, void *priv)
{
struct prism2_wep_data *wep = priv;
if (len < 0 || len > WEP_KEY_LEN)
return -1;
memcpy(wep->key, key, len);
wep->key_len = len;
return 0;
}
static int prism2_wep_get_key(void *key, int len, u8 *seq, void *priv)
{
struct prism2_wep_data *wep = priv;
if (len < wep->key_len)
return -1;
memcpy(key, wep->key, wep->key_len);
return wep->key_len;
}
static char * prism2_wep_print_stats(char *p, void *priv)
{
struct prism2_wep_data *wep = priv;
p += sprintf(p, "key[%d] alg=WEP len=%d\n",
wep->key_idx, wep->key_len);
return p;
}
static struct ieee80211_crypto_ops ieee80211_crypt_wep = {
.name = "WEP",
.init = prism2_wep_init,
.deinit = prism2_wep_deinit,
.encrypt_mpdu = prism2_wep_encrypt,
.decrypt_mpdu = prism2_wep_decrypt,
.encrypt_msdu = NULL,
.decrypt_msdu = NULL,
.set_key = prism2_wep_set_key,
.get_key = prism2_wep_get_key,
.print_stats = prism2_wep_print_stats,
.extra_prefix_len = 4, /* IV */
.extra_postfix_len = 4, /* ICV */
.owner = THIS_MODULE,
};
static int __init ieee80211_crypto_wep_init(void)
{
return ieee80211_register_crypto_ops(&ieee80211_crypt_wep);
}
static void __exit ieee80211_crypto_wep_exit(void)
{
ieee80211_unregister_crypto_ops(&ieee80211_crypt_wep);
}
module_init(ieee80211_crypto_wep_init);
module_exit(ieee80211_crypto_wep_exit);
net/ieee80211/ieee80211_module.c 0 → 100644
浏览文件 @ b453872c
/*******************************************************************************
Copyright(c) 2004 Intel Corporation. All rights reserved.
Portions of this file are based on the WEP enablement code provided by the
Host AP project hostap-drivers v0.1.3
Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
<jkmaline@cc.hut.fi>
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 version 2 of the GNU General Public License as
published by the Free Software Foundation.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59
Temple Place - Suite 330, Boston, MA 02111-1307, USA.
The full GNU General Public License is included in this distribution in the
file called LICENSE.
Contact Information:
James P. Ketrenos <ipw2100-admin@linux.intel.com>
Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*******************************************************************************/
#include <linux/compiler.h>
#include <linux/config.h>
#include <linux/errno.h>
#include <linux/if_arp.h>
#include <linux/in6.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/tcp.h>
#include <linux/types.h>
#include <linux/version.h>
#include <linux/wireless.h>
#include <linux/etherdevice.h>
#include <asm/uaccess.h>
#include <net/arp.h>
#include <net/ieee80211.h>
MODULE_DESCRIPTION("802.11 data/management/control stack");
MODULE_AUTHOR("Copyright (C) 2004 Intel Corporation <jketreno@linux.intel.com>");
MODULE_LICENSE("GPL");
#define DRV_NAME "ieee80211"
static inline int ieee80211_networks_allocate(struct ieee80211_device *ieee)
{
if (ieee->networks)
return 0;
ieee->networks = kmalloc(
MAX_NETWORK_COUNT * sizeof(struct ieee80211_network),
GFP_KERNEL);
if (!ieee->networks) {
printk(KERN_WARNING "%s: Out of memory allocating beacons\n",
ieee->dev->name);
return -ENOMEM;
}
memset(ieee->networks, 0,
MAX_NETWORK_COUNT * sizeof(struct ieee80211_network));
return 0;
}
static inline void ieee80211_networks_free(struct ieee80211_device *ieee)
{
if (!ieee->networks)
return;
kfree(ieee->networks);
ieee->networks = NULL;
}
static inline void ieee80211_networks_initialize(struct ieee80211_device *ieee)
{
int i;
INIT_LIST_HEAD(&ieee->network_free_list);
INIT_LIST_HEAD(&ieee->network_list);
for (i = 0; i < MAX_NETWORK_COUNT; i++)
list_add_tail(&ieee->networks[i].list, &ieee->network_free_list);
}
struct net_device *alloc_ieee80211(int sizeof_priv)
{
struct ieee80211_device *ieee;
struct net_device *dev;
int err;
IEEE80211_DEBUG_INFO("Initializing...\n");
dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv);
if (!dev) {
IEEE80211_ERROR("Unable to network device.\n");
goto failed;
}
ieee = netdev_priv(dev);
dev->hard_start_xmit = ieee80211_xmit;
ieee->dev = dev;
err = ieee80211_networks_allocate(ieee);
if (err) {
IEEE80211_ERROR("Unable to allocate beacon storage: %d\n",
err);
goto failed;
}
ieee80211_networks_initialize(ieee);
/* Default fragmentation threshold is maximum payload size */
ieee->fts = DEFAULT_FTS;
ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
ieee->open_wep = 1;
/* Default to enabling full open WEP with host based encrypt/decrypt */
ieee->host_encrypt = 1;
ieee->host_decrypt = 1;
ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
INIT_LIST_HEAD(&ieee->crypt_deinit_list);
init_timer(&ieee->crypt_deinit_timer);
ieee->crypt_deinit_timer.data = (unsigned long)ieee;
ieee->crypt_deinit_timer.function = ieee80211_crypt_deinit_handler;
spin_lock_init(&ieee->lock);
ieee->wpa_enabled = 0;
ieee->tkip_countermeasures = 0;
ieee->drop_unencrypted = 0;
ieee->privacy_invoked = 0;
ieee->ieee802_1x = 1;
return dev;
failed:
if (dev)
free_netdev(dev);
return NULL;
}
void free_ieee80211(struct net_device *dev)
{
struct ieee80211_device *ieee = netdev_priv(dev);
int i;
del_timer_sync(&ieee->crypt_deinit_timer);
ieee80211_crypt_deinit_entries(ieee, 1);
for (i = 0; i < WEP_KEYS; i++) {
struct ieee80211_crypt_data *crypt = ieee->crypt[i];
if (crypt) {
if (crypt->ops) {
crypt->ops->deinit(crypt->priv);
module_put(crypt->ops->owner);
}
kfree(crypt);
ieee->crypt[i] = NULL;
}
}
ieee80211_networks_free(ieee);
free_netdev(dev);
}
#ifdef CONFIG_IEEE80211_DEBUG
static int debug = 0;
u32 ieee80211_debug_level = 0;
struct proc_dir_entry *ieee80211_proc = NULL;
static int show_debug_level(char *page, char **start, off_t offset,
int count, int *eof, void *data)
{
return snprintf(page, count, "0x%08X\n", ieee80211_debug_level);
}
static int store_debug_level(struct file *file, const char *buffer,
unsigned long count, void *data)
{
char buf[] = "0x00000000";
unsigned long len = min(sizeof(buf) - 1, (u32)count);
char *p = (char *)buf;
unsigned long val;
if (copy_from_user(buf, buffer, len))
return count;
buf[len] = 0;
if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
p++;
if (p[0] == 'x' || p[0] == 'X')
p++;
val = simple_strtoul(p, &p, 16);
} else
val = simple_strtoul(p, &p, 10);
if (p == buf)
printk(KERN_INFO DRV_NAME
": %s is not in hex or decimal form.\n", buf);
else
ieee80211_debug_level = val;
return strnlen(buf, count);
}
static int __init ieee80211_init(void)
{
struct proc_dir_entry *e;
ieee80211_debug_level = debug;
ieee80211_proc = create_proc_entry(DRV_NAME, S_IFDIR, proc_net);
if (ieee80211_proc == NULL) {
IEEE80211_ERROR("Unable to create " DRV_NAME
" proc directory\n");
return -EIO;
}
e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
ieee80211_proc);
if (!e) {
remove_proc_entry(DRV_NAME, proc_net);
ieee80211_proc = NULL;
return -EIO;
}
e->read_proc = show_debug_level;
e->write_proc = store_debug_level;
e->data = NULL;
return 0;
}
static void __exit ieee80211_exit(void)
{
if (ieee80211_proc) {
remove_proc_entry("debug_level", ieee80211_proc);
remove_proc_entry(DRV_NAME, proc_net);
ieee80211_proc = NULL;
}
}
#include <linux/moduleparam.h>
module_param(debug, int, 0444);
MODULE_PARM_DESC(debug, "debug output mask");
module_exit(ieee80211_exit);
module_init(ieee80211_init);
#endif
EXPORT_SYMBOL(alloc_ieee80211);
EXPORT_SYMBOL(free_ieee80211);
net/ieee80211/ieee80211_rx.c 0 → 100644
浏览文件 @ b453872c
此差异已折叠。
net/ieee80211/ieee80211_tx.c 0 → 100644
浏览文件 @ b453872c
此差异已折叠。
net/ieee80211/ieee80211_wx.c 0 → 100644
浏览文件 @ b453872c
此差异已折叠。
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