diff options
Diffstat (limited to 'drivers/staging/wlan-ng/p80211wep.c')
| -rw-r--r-- | drivers/staging/wlan-ng/p80211wep.c | 207 |
1 files changed, 0 insertions, 207 deletions
diff --git a/drivers/staging/wlan-ng/p80211wep.c b/drivers/staging/wlan-ng/p80211wep.c deleted file mode 100644 index e7b26b057124..000000000000 --- a/drivers/staging/wlan-ng/p80211wep.c +++ /dev/null @@ -1,207 +0,0 @@ -// SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1) -/* - * - * WEP encode/decode for P80211. - * - * Copyright (C) 2002 AbsoluteValue Systems, Inc. All Rights Reserved. - * -------------------------------------------------------------------- - * - * linux-wlan - * - * -------------------------------------------------------------------- - * - * Inquiries regarding the linux-wlan Open Source project can be - * made directly to: - * - * AbsoluteValue Systems Inc. - * info@linux-wlan.com - * http://www.linux-wlan.com - * - * -------------------------------------------------------------------- - * - * Portions of the development of this software were funded by - * Intersil Corporation as part of PRISM(R) chipset product development. - * - * -------------------------------------------------------------------- - */ - -/*================================================================*/ -/* System Includes */ - -#include <linux/crc32.h> -#include <linux/netdevice.h> -#include <linux/wireless.h> -#include <linux/random.h> -#include <linux/kernel.h> -#include "p80211hdr.h" -#include "p80211types.h" -#include "p80211msg.h" -#include "p80211conv.h" -#include "p80211netdev.h" - -#define WEP_KEY(x) (((x) & 0xC0) >> 6) - -/* keylen in bytes! */ - -int wep_change_key(struct wlandevice *wlandev, int keynum, u8 *key, int keylen) -{ - if (keylen < 0) - return -1; - if (keylen >= MAX_KEYLEN) - return -1; - if (!key) - return -1; - if (keynum < 0) - return -1; - if (keynum >= NUM_WEPKEYS) - return -1; - - wlandev->wep_keylens[keynum] = keylen; - memcpy(wlandev->wep_keys[keynum], key, keylen); - - return 0; -} - -/* - * 4-byte IV at start of buffer, 4-byte ICV at end of buffer. - * if successful, buf start is payload begin, length -= 8; - */ -int wep_decrypt(struct wlandevice *wlandev, u8 *buf, u32 len, int key_override, - u8 *iv, u8 *icv) -{ - u32 i, j, k, crc, keylen; - u8 s[256], key[64], c_crc[4]; - u8 keyidx; - - /* Needs to be at least 8 bytes of payload */ - if (len <= 0) - return -1; - - /* initialize the first bytes of the key from the IV */ - key[0] = iv[0]; - key[1] = iv[1]; - key[2] = iv[2]; - keyidx = WEP_KEY(iv[3]); - - if (key_override >= 0) - keyidx = key_override; - - if (keyidx >= NUM_WEPKEYS) - return -2; - - keylen = wlandev->wep_keylens[keyidx]; - - if (keylen == 0) - return -3; - - /* copy the rest of the key over from the designated key */ - memcpy(key + 3, wlandev->wep_keys[keyidx], keylen); - - keylen += 3; /* add in IV bytes */ - - /* set up the RC4 state */ - for (i = 0; i < 256; i++) - s[i] = i; - j = 0; - for (i = 0; i < 256; i++) { - j = (j + s[i] + key[i % keylen]) & 0xff; - swap(i, j); - } - - /* Apply the RC4 to the data, update the CRC32 */ - i = 0; - j = 0; - for (k = 0; k < len; k++) { - i = (i + 1) & 0xff; - j = (j + s[i]) & 0xff; - swap(i, j); - buf[k] ^= s[(s[i] + s[j]) & 0xff]; - } - crc = ~crc32_le(~0, buf, len); - - /* now let's check the crc */ - c_crc[0] = crc; - c_crc[1] = crc >> 8; - c_crc[2] = crc >> 16; - c_crc[3] = crc >> 24; - - for (k = 0; k < 4; k++) { - i = (i + 1) & 0xff; - j = (j + s[i]) & 0xff; - swap(i, j); - if ((c_crc[k] ^ s[(s[i] + s[j]) & 0xff]) != icv[k]) - return -(4 | (k << 4)); /* ICV mismatch */ - } - - return 0; -} - -/* encrypts in-place. */ -int wep_encrypt(struct wlandevice *wlandev, u8 *buf, - u8 *dst, u32 len, int keynum, u8 *iv, u8 *icv) -{ - u32 i, j, k, crc, keylen; - u8 s[256], key[64]; - - /* no point in WEPping an empty frame */ - if (len <= 0) - return -1; - - /* we need to have a real key.. */ - if (keynum >= NUM_WEPKEYS) - return -2; - keylen = wlandev->wep_keylens[keynum]; - if (keylen <= 0) - return -3; - - /* use a random IV. And skip known weak ones. */ - get_random_bytes(iv, 3); - while ((iv[1] == 0xff) && (iv[0] >= 3) && (iv[0] < keylen)) - get_random_bytes(iv, 3); - - iv[3] = (keynum & 0x03) << 6; - - key[0] = iv[0]; - key[1] = iv[1]; - key[2] = iv[2]; - - /* copy the rest of the key over from the designated key */ - memcpy(key + 3, wlandev->wep_keys[keynum], keylen); - - keylen += 3; /* add in IV bytes */ - - /* set up the RC4 state */ - for (i = 0; i < 256; i++) - s[i] = i; - j = 0; - for (i = 0; i < 256; i++) { - j = (j + s[i] + key[i % keylen]) & 0xff; - swap(i, j); - } - - /* Update CRC32 then apply RC4 to the data */ - i = 0; - j = 0; - for (k = 0; k < len; k++) { - i = (i + 1) & 0xff; - j = (j + s[i]) & 0xff; - swap(i, j); - dst[k] = buf[k] ^ s[(s[i] + s[j]) & 0xff]; - } - crc = ~crc32_le(~0, buf, len); - - /* now let's encrypt the crc */ - icv[0] = crc; - icv[1] = crc >> 8; - icv[2] = crc >> 16; - icv[3] = crc >> 24; - - for (k = 0; k < 4; k++) { - i = (i + 1) & 0xff; - j = (j + s[i]) & 0xff; - swap(i, j); - icv[k] ^= s[(s[i] + s[j]) & 0xff]; - } - - return 0; -} |