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b43: Add key memory dumping

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This adds an option to dump all crypto related memory to
the kernel log.
Obviously, it should not be enabled on productive systems. ;)

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Michael Buesch 2008-12-19 20:24:30 +01:00 committed by John W. Linville
parent b929ecf796
commit 9cf7f247bd
3 changed files with 53 additions and 2 deletions
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1
drivers/net/wireless/b43/debugfs.c
View File

@ -731,6 +731,7 @@ static void b43_add_dynamic_debug(struct b43_wldev *dev)
add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, 0);
add_dyn_dbg("debug_lo", B43_DBG_LO, 0);
add_dyn_dbg("debug_firmware", B43_DBG_FIRMWARE, 0);
add_dyn_dbg("debug_keys", B43_DBG_KEYS, 0);
#undef add_dyn_dbg
}

1
drivers/net/wireless/b43/debugfs.h
View File

@ -12,6 +12,7 @@ enum b43_dyndbg { /* Dynamic debugging features */
B43_DBG_PWORK_STOP,
B43_DBG_LO,
B43_DBG_FIRMWARE,
B43_DBG_KEYS,
__B43_NR_DYNDBG,
};

53
drivers/net/wireless/b43/main.c
View File

@ -992,6 +992,52 @@ static void b43_clear_keys(struct b43_wldev *dev)
b43_key_clear(dev, i);
}
static void b43_dump_keymemory(struct b43_wldev *dev)
{
unsigned int i, index, offset;
DECLARE_MAC_BUF(macbuf);
u8 mac[ETH_ALEN];
u16 algo;
u32 rcmta0;
u16 rcmta1;
u64 hf;
struct b43_key *key;
if (!b43_debug(dev, B43_DBG_KEYS))
return;
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++) {
key = &(dev->key[index]);
printk(KERN_DEBUG "Key slot %02u: %s",
index, (key->keyconf == NULL) ? " " : "*");
offset = dev->ktp + (index * B43_SEC_KEYSIZE);
for (i = 0; i < B43_SEC_KEYSIZE; i += 2) {
u16 tmp = b43_shm_read16(dev, B43_SHM_SHARED, offset + i);
printk("%02X%02X", (tmp & 0xFF), ((tmp >> 8) & 0xFF));
}
algo = b43_shm_read16(dev, B43_SHM_SHARED,
B43_SHM_SH_KEYIDXBLOCK + (index * 2));
printk(" Algo: %04X/%02X", algo, key->algorithm);
if (index >= 4) {
rcmta0 = b43_shm_read32(dev, B43_SHM_RCMTA,
((index - 4) * 2) + 0);
rcmta1 = b43_shm_read16(dev, B43_SHM_RCMTA,
((index - 4) * 2) + 1);
*((__le32 *)(&mac[0])) = cpu_to_le32(rcmta0);
*((__le16 *)(&mac[4])) = cpu_to_le16(rcmta1);
printk(" MAC: %s",
print_mac(macbuf, mac));
} else
printk(" DEFAULT KEY");
printk("\n");
}
}
void b43_power_saving_ctl_bits(struct b43_wldev *dev, unsigned int ps_flags)
{
u32 macctl;
@ -3565,15 +3611,18 @@ static int b43_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
default:
B43_WARN_ON(1);
}
out_unlock:
spin_unlock_irqrestore(&wl->irq_lock, flags);
mutex_unlock(&wl->mutex);
if (!err) {
b43dbg(wl, "%s hardware based encryption for keyidx: %d, "
"mac: %pM\n",
cmd == SET_KEY ? "Using" : "Disabling", key->keyidx,
addr);
b43_dump_keymemory(dev);
}
spin_unlock_irqrestore(&wl->irq_lock, flags);
mutex_unlock(&wl->mutex);
return err;
}