mirror of
https://github.com/torvalds/linux.git
synced 2024-12-21 10:31:54 +00:00
4adb474b6b
No functional change. Signed-off-by: David Kilroy <kilroyd@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/* Orinoco MIC helpers
|
|
*
|
|
* See copyright notice in main.c
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/string.h>
|
|
#include <linux/if_ether.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/crypto.h>
|
|
|
|
#include "orinoco.h"
|
|
#include "mic.h"
|
|
|
|
/********************************************************************/
|
|
/* Michael MIC crypto setup */
|
|
/********************************************************************/
|
|
int orinoco_mic_init(struct orinoco_private *priv)
|
|
{
|
|
priv->tx_tfm_mic = crypto_alloc_hash("michael_mic", 0, 0);
|
|
if (IS_ERR(priv->tx_tfm_mic)) {
|
|
printk(KERN_DEBUG "orinoco_mic_init: could not allocate "
|
|
"crypto API michael_mic\n");
|
|
priv->tx_tfm_mic = NULL;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
priv->rx_tfm_mic = crypto_alloc_hash("michael_mic", 0, 0);
|
|
if (IS_ERR(priv->rx_tfm_mic)) {
|
|
printk(KERN_DEBUG "orinoco_mic_init: could not allocate "
|
|
"crypto API michael_mic\n");
|
|
priv->rx_tfm_mic = NULL;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void orinoco_mic_free(struct orinoco_private *priv)
|
|
{
|
|
if (priv->tx_tfm_mic)
|
|
crypto_free_hash(priv->tx_tfm_mic);
|
|
if (priv->rx_tfm_mic)
|
|
crypto_free_hash(priv->rx_tfm_mic);
|
|
}
|
|
|
|
int orinoco_mic(struct crypto_hash *tfm_michael, u8 *key,
|
|
u8 *da, u8 *sa, u8 priority,
|
|
u8 *data, size_t data_len, u8 *mic)
|
|
{
|
|
struct hash_desc desc;
|
|
struct scatterlist sg[2];
|
|
u8 hdr[ETH_HLEN + 2]; /* size of header + padding */
|
|
|
|
if (tfm_michael == NULL) {
|
|
printk(KERN_WARNING "orinoco_mic: tfm_michael == NULL\n");
|
|
return -1;
|
|
}
|
|
|
|
/* Copy header into buffer. We need the padding on the end zeroed */
|
|
memcpy(&hdr[0], da, ETH_ALEN);
|
|
memcpy(&hdr[ETH_ALEN], sa, ETH_ALEN);
|
|
hdr[ETH_ALEN*2] = priority;
|
|
hdr[ETH_ALEN*2+1] = 0;
|
|
hdr[ETH_ALEN*2+2] = 0;
|
|
hdr[ETH_ALEN*2+3] = 0;
|
|
|
|
/* Use scatter gather to MIC header and data in one go */
|
|
sg_init_table(sg, 2);
|
|
sg_set_buf(&sg[0], hdr, sizeof(hdr));
|
|
sg_set_buf(&sg[1], data, data_len);
|
|
|
|
if (crypto_hash_setkey(tfm_michael, key, MIC_KEYLEN))
|
|
return -1;
|
|
|
|
desc.tfm = tfm_michael;
|
|
desc.flags = 0;
|
|
return crypto_hash_digest(&desc, sg, data_len + sizeof(hdr),
|
|
mic);
|
|
}
|