aboutsummaryrefslogtreecommitdiffstats
path: root/wlantest/wep.c
diff options
context:
space:
mode:
Diffstat (limited to 'wlantest/wep.c')
-rw-r--r--wlantest/wep.c103
1 files changed, 0 insertions, 103 deletions
diff --git a/wlantest/wep.c b/wlantest/wep.c
deleted file mode 100644
index c4137f3..0000000
--- a/wlantest/wep.c
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
- * Wired Equivalent Privacy (WEP)
- * Copyright (c) 2010, Jouni Malinen <j@w1.fi>
- *
- * This software may be distributed under the terms of the BSD license.
- * See README for more details.
- */
-
-#include "utils/includes.h"
-
-#include "utils/common.h"
-#include "common/ieee802_11_defs.h"
-#include "wlantest.h"
-
-
-void wep_crypt(u8 *key, u8 *buf, size_t plen)
-{
- u32 i, j, k;
- u8 S[256];
-#define S_SWAP(a,b) do { u8 t = S[a]; S[a] = S[b]; S[b] = t; } while(0)
- u8 *pos;
-
- /* Setup 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 & 0x0f]) & 0xff;
- S_SWAP(i, j);
- }
-
- /* Apply RC4 to data */
- pos = buf;
- i = j = 0;
- for (k = 0; k < plen; k++) {
- i = (i + 1) & 0xff;
- j = (j + S[i]) & 0xff;
- S_SWAP(i, j);
- *pos ^= S[(S[i] + S[j]) & 0xff];
- pos++;
- }
-}
-
-
-static int try_wep(const u8 *key, size_t key_len, const u8 *data,
- size_t data_len, u8 *plain)
-{
- u32 icv, rx_icv;
- u8 k[16];
- int i, j;
-
- for (i = 0, j = 0; i < sizeof(k); i++) {
- k[i] = key[j];
- j++;
- if (j >= key_len)
- j = 0;
- }
-
- os_memcpy(plain, data, data_len);
- wep_crypt(k, plain, data_len);
- icv = crc32(plain, data_len - 4);
- rx_icv = WPA_GET_LE32(plain + data_len - 4);
- if (icv != rx_icv)
- return -1;
-
- return 0;
-}
-
-
-u8 * wep_decrypt(struct wlantest *wt, const struct ieee80211_hdr *hdr,
- const u8 *data, size_t data_len, size_t *decrypted_len)
-{
- u8 *plain;
- struct wlantest_wep *w;
- int found = 0;
- u8 key[16];
-
- if (dl_list_empty(&wt->wep))
- return NULL;
-
- if (data_len < 4 + 4)
- return NULL;
- plain = os_malloc(data_len - 4);
- if (plain == NULL)
- return NULL;
-
- dl_list_for_each(w, &wt->wep, struct wlantest_wep, list) {
- os_memcpy(key, data, 3);
- os_memcpy(key + 3, w->key, w->key_len);
- if (try_wep(key, 3 + w->key_len, data + 4, data_len - 4, plain)
- == 0) {
- found = 1;
- break;
- }
- }
- if (!found) {
- os_free(plain);
- return NULL;
- }
-
- *decrypted_len = data_len - 4 - 4;
- return plain;
-}