Commit 66d2d089 authored by Michael Buesch's avatar Michael Buesch Committed by John W. Linville
Browse files

b43: Fix hardware key index handling



This fixes the hardware encryption keys index and array size handling.

Thanks to Gregor Kowski for reporting this issue.
Signed-off-by: default avatarMichael Buesch <mb@bu3sch.de>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 5ba63533
......@@ -493,6 +493,10 @@ enum {
/* Max size of a security key */
#define B43_SEC_KEYSIZE 16
/* Max number of group keys */
#define B43_NR_GROUP_KEYS 4
/* Max number of pairwise keys */
#define B43_NR_PAIRWISE_KEYS 50
/* Security algorithms. */
enum {
B43_SEC_ALGO_NONE = 0, /* unencrypted, as of TX header. */
......@@ -819,8 +823,7 @@ struct b43_wldev {
/* encryption/decryption */
u16 ktp; /* Key table pointer */
u8 max_nr_keys;
struct b43_key key[58];
struct b43_key key[B43_NR_GROUP_KEYS * 2 + B43_NR_PAIRWISE_KEYS];
/* Firmware data */
struct b43_firmware fw;
......
......@@ -796,18 +796,19 @@ static void key_write(struct b43_wldev *dev,
static void keymac_write(struct b43_wldev *dev, u8 index, const u8 *addr)
{
u32 addrtmp[2] = { 0, 0, };
u8 per_sta_keys_start = 8;
u8 pairwise_keys_start = B43_NR_GROUP_KEYS * 2;
if (b43_new_kidx_api(dev))
per_sta_keys_start = 4;
pairwise_keys_start = B43_NR_GROUP_KEYS;
B43_WARN_ON(index < per_sta_keys_start);
/* We have two default TX keys and possibly two default RX keys.
B43_WARN_ON(index < pairwise_keys_start);
/* We have four default TX keys and possibly four default RX keys.
* Physical mac 0 is mapped to physical key 4 or 8, depending
* on the firmware version.
* So we must adjust the index here.
*/
index -= per_sta_keys_start;
index -= pairwise_keys_start;
B43_WARN_ON(index >= B43_NR_PAIRWISE_KEYS);
if (addr) {
addrtmp[0] = addr[0];
......@@ -818,27 +819,11 @@ static void keymac_write(struct b43_wldev *dev, u8 index, const u8 *addr)
addrtmp[1] |= ((u32) (addr[5]) << 8);
}
if (dev->dev->id.revision >= 5) {
/* Receive match transmitter address mechanism */
b43_shm_write32(dev, B43_SHM_RCMTA,
(index * 2) + 0, addrtmp[0]);
b43_shm_write16(dev, B43_SHM_RCMTA,
(index * 2) + 1, addrtmp[1]);
} else {
/* RXE (Receive Engine) and
* PSM (Programmable State Machine) mechanism
*/
if (index < 8) {
/* TODO write to RCM 16, 19, 22 and 25 */
} else {
b43_shm_write32(dev, B43_SHM_SHARED,
B43_SHM_SH_PSM + (index * 6) + 0,
addrtmp[0]);
b43_shm_write16(dev, B43_SHM_SHARED,
B43_SHM_SH_PSM + (index * 6) + 4,
addrtmp[1]);
}
}
/* Receive match transmitter address (RCMTA) mechanism */
b43_shm_write32(dev, B43_SHM_RCMTA,
(index * 2) + 0, addrtmp[0]);
b43_shm_write16(dev, B43_SHM_RCMTA,
(index * 2) + 1, addrtmp[1]);
}
static void do_key_write(struct b43_wldev *dev,
......@@ -846,20 +831,20 @@ static void do_key_write(struct b43_wldev *dev,
const u8 *key, size_t key_len, const u8 *mac_addr)
{
u8 buf[B43_SEC_KEYSIZE] = { 0, };
u8 per_sta_keys_start = 8;
u8 pairwise_keys_start = B43_NR_GROUP_KEYS * 2;
if (b43_new_kidx_api(dev))
per_sta_keys_start = 4;
pairwise_keys_start = B43_NR_GROUP_KEYS;
B43_WARN_ON(index >= dev->max_nr_keys);
B43_WARN_ON(index >= ARRAY_SIZE(dev->key));
B43_WARN_ON(key_len > B43_SEC_KEYSIZE);
if (index >= per_sta_keys_start)
if (index >= pairwise_keys_start)
keymac_write(dev, index, NULL); /* First zero out mac. */
if (key)
memcpy(buf, key, key_len);
key_write(dev, index, algorithm, buf);
if (index >= per_sta_keys_start)
if (index >= pairwise_keys_start)
keymac_write(dev, index, mac_addr);
dev->key[index].algorithm = algorithm;
......@@ -872,21 +857,24 @@ static int b43_key_write(struct b43_wldev *dev,
struct ieee80211_key_conf *keyconf)
{
int i;
int sta_keys_start;
int pairwise_keys_start;
if (key_len > B43_SEC_KEYSIZE)
return -EINVAL;
for (i = 0; i < dev->max_nr_keys; i++) {
for (i = 0; i < ARRAY_SIZE(dev->key); i++) {
/* Check that we don't already have this key. */
B43_WARN_ON(dev->key[i].keyconf == keyconf);
}
if (index < 0) {
/* Pairwise key. Get an empty slot for the key. */
if (b43_new_kidx_api(dev))
sta_keys_start = 4;
pairwise_keys_start = B43_NR_GROUP_KEYS;
else
sta_keys_start = 8;
for (i = sta_keys_start; i < dev->max_nr_keys; i++) {
pairwise_keys_start = B43_NR_GROUP_KEYS * 2;
for (i = pairwise_keys_start;
i < pairwise_keys_start + B43_NR_PAIRWISE_KEYS;
i++) {
B43_WARN_ON(i >= ARRAY_SIZE(dev->key));
if (!dev->key[i].keyconf) {
/* found empty */
index = i;
......@@ -914,7 +902,7 @@ static int b43_key_write(struct b43_wldev *dev,
static int b43_key_clear(struct b43_wldev *dev, int index)
{
if (B43_WARN_ON((index < 0) || (index >= dev->max_nr_keys)))
if (B43_WARN_ON((index < 0) || (index >= ARRAY_SIZE(dev->key))))
return -EINVAL;
do_key_write(dev, index, B43_SEC_ALGO_NONE,
NULL, B43_SEC_KEYSIZE, NULL);
......@@ -929,15 +917,19 @@ static int b43_key_clear(struct b43_wldev *dev, int index)
static void b43_clear_keys(struct b43_wldev *dev)
{
int i;
int i, count;
for (i = 0; i < dev->max_nr_keys; i++)
if (b43_new_kidx_api(dev))
count = B43_NR_GROUP_KEYS + B43_NR_PAIRWISE_KEYS;
else
count = B43_NR_GROUP_KEYS * 2 + B43_NR_PAIRWISE_KEYS;
for (i = 0; i < count; i++)
b43_key_clear(dev, i);
}
static void b43_dump_keymemory(struct b43_wldev *dev)
{
unsigned int i, index, offset;
unsigned int i, index, count, offset, pairwise_keys_start;
u8 mac[ETH_ALEN];
u16 algo;
u32 rcmta0;
......@@ -951,7 +943,14 @@ static void b43_dump_keymemory(struct b43_wldev *dev)
hf = b43_hf_read(dev);
b43dbg(dev->wl, "Hardware key memory dump: USEDEFKEYS=%u\n",
!!(hf & B43_HF_USEDEFKEYS));
for (index = 0; index < dev->max_nr_keys; index++) {
if (b43_new_kidx_api(dev)) {
pairwise_keys_start = B43_NR_GROUP_KEYS;
count = B43_NR_GROUP_KEYS + B43_NR_PAIRWISE_KEYS;
} else {
pairwise_keys_start = B43_NR_GROUP_KEYS * 2;
count = B43_NR_GROUP_KEYS * 2 + B43_NR_PAIRWISE_KEYS;
}
for (index = 0; index < count; index++) {
key = &(dev->key[index]);
printk(KERN_DEBUG "Key slot %02u: %s",
index, (key->keyconf == NULL) ? " " : "*");
......@@ -965,11 +964,11 @@ static void b43_dump_keymemory(struct b43_wldev *dev)
B43_SHM_SH_KEYIDXBLOCK + (index * 2));
printk(" Algo: %04X/%02X", algo, key->algorithm);
if (index >= 4) {
if (index >= pairwise_keys_start) {
rcmta0 = b43_shm_read32(dev, B43_SHM_RCMTA,
((index - 4) * 2) + 0);
((index - pairwise_keys_start) * 2) + 0);
rcmta1 = b43_shm_read16(dev, B43_SHM_RCMTA,
((index - 4) * 2) + 1);
((index - pairwise_keys_start) * 2) + 1);
*((__le32 *)(&mac[0])) = cpu_to_le32(rcmta0);
*((__le16 *)(&mac[4])) = cpu_to_le16(rcmta1);
printk(" MAC: %pM", mac);
......@@ -2876,17 +2875,14 @@ error:
static void b43_security_init(struct b43_wldev *dev)
{
dev->max_nr_keys = (dev->dev->id.revision >= 5) ? 58 : 20;
B43_WARN_ON(dev->max_nr_keys > ARRAY_SIZE(dev->key));
dev->ktp = b43_shm_read16(dev, B43_SHM_SHARED, B43_SHM_SH_KTP);
/* KTP is a word address, but we address SHM bytewise.
* So multiply by two.
*/
dev->ktp *= 2;
if (dev->dev->id.revision >= 5) {
/* Number of RCMTA address slots */
b43_write16(dev, B43_MMIO_RCMTA_COUNT, dev->max_nr_keys - 8);
}
/* Number of RCMTA address slots */
b43_write16(dev, B43_MMIO_RCMTA_COUNT, B43_NR_PAIRWISE_KEYS);
/* Clear the key memory. */
b43_clear_keys(dev);
}
......
......@@ -237,7 +237,7 @@ int b43_generate_txhdr(struct b43_wldev *dev,
int wlhdr_len;
size_t iv_len;
B43_WARN_ON(key_idx >= dev->max_nr_keys);
B43_WARN_ON(key_idx >= ARRAY_SIZE(dev->key));
key = &(dev->key[key_idx]);
if (unlikely(!key->keyconf)) {
......@@ -578,7 +578,7 @@ void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
* key index, but the ucode passed it slightly different.
*/
keyidx = b43_kidx_to_raw(dev, keyidx);
B43_WARN_ON(keyidx >= dev->max_nr_keys);
B43_WARN_ON(keyidx >= ARRAY_SIZE(dev->key));
if (dev->key[keyidx].algorithm != B43_SEC_ALGO_NONE) {
wlhdr_len = ieee80211_hdrlen(fctl);
......
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