diff options
author | Greg Kroah-Hartman <gregkh@suse.de> | 2008-10-02 14:29:28 -0400 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-10-10 18:31:10 -0400 |
commit | 00b3ed1685089ff52169a715de11106ed37df087 (patch) | |
tree | 27fff3d6498ca0f5975f8b0ac1c09beda5f9b1da /drivers/staging/wlan-ng/p80211wep.c | |
parent | 66101de10957e07a6fd0365d5af9adf650246d14 (diff) |
Staging: add wlan-ng prism2 usb driver
This adds the wlan-ng prism2 USB driver to the drivers/staging tree.
The code was originally written by the linux-wlan-ng team, patched by
some Novell engineers to properly work on newer kernels, and then hacked
into place in order to get it to build properly in a single subdirectory
within the kernel tree by me.
It supports a wide range of older USB prism2 devices, and contains a
80211 stack to support this single driver.
Cc: Christian Zoz <zoz@suse.de>
Cc: Andreas Gruenbacher <agruen@suse.de>
Cc: linux-wireless <linux-wireless@vger.kernel.org>
Cc: John Linville <linville@tuxdriver.com>
Cc: Helmut Schaa <helmut.schaa@googlemail.com>
Cc: linux-wlan-ng <solomon@linux-wlan.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/wlan-ng/p80211wep.c')
-rw-r--r-- | drivers/staging/wlan-ng/p80211wep.c | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/drivers/staging/wlan-ng/p80211wep.c b/drivers/staging/wlan-ng/p80211wep.c new file mode 100644 index 00000000000..53fe2985971 --- /dev/null +++ b/drivers/staging/wlan-ng/p80211wep.c | |||
@@ -0,0 +1,317 @@ | |||
1 | /* src/p80211/p80211wep.c | ||
2 | * | ||
3 | * WEP encode/decode for P80211. | ||
4 | * | ||
5 | * Copyright (C) 2002 AbsoluteValue Systems, Inc. All Rights Reserved. | ||
6 | * -------------------------------------------------------------------- | ||
7 | * | ||
8 | * linux-wlan | ||
9 | * | ||
10 | * The contents of this file are subject to the Mozilla Public | ||
11 | * License Version 1.1 (the "License"); you may not use this file | ||
12 | * except in compliance with the License. You may obtain a copy of | ||
13 | * the License at http://www.mozilla.org/MPL/ | ||
14 | * | ||
15 | * Software distributed under the License is distributed on an "AS | ||
16 | * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or | ||
17 | * implied. See the License for the specific language governing | ||
18 | * rights and limitations under the License. | ||
19 | * | ||
20 | * Alternatively, the contents of this file may be used under the | ||
21 | * terms of the GNU Public License version 2 (the "GPL"), in which | ||
22 | * case the provisions of the GPL are applicable instead of the | ||
23 | * above. If you wish to allow the use of your version of this file | ||
24 | * only under the terms of the GPL and not to allow others to use | ||
25 | * your version of this file under the MPL, indicate your decision | ||
26 | * by deleting the provisions above and replace them with the notice | ||
27 | * and other provisions required by the GPL. If you do not delete | ||
28 | * the provisions above, a recipient may use your version of this | ||
29 | * file under either the MPL or the GPL. | ||
30 | * | ||
31 | * -------------------------------------------------------------------- | ||
32 | * | ||
33 | * Inquiries regarding the linux-wlan Open Source project can be | ||
34 | * made directly to: | ||
35 | * | ||
36 | * AbsoluteValue Systems Inc. | ||
37 | * info@linux-wlan.com | ||
38 | * http://www.linux-wlan.com | ||
39 | * | ||
40 | * -------------------------------------------------------------------- | ||
41 | * | ||
42 | * Portions of the development of this software were funded by | ||
43 | * Intersil Corporation as part of PRISM(R) chipset product development. | ||
44 | * | ||
45 | * -------------------------------------------------------------------- | ||
46 | */ | ||
47 | |||
48 | /*================================================================*/ | ||
49 | /* System Includes */ | ||
50 | |||
51 | |||
52 | #include <linux/version.h> | ||
53 | |||
54 | #include <linux/netdevice.h> | ||
55 | #include <linux/wireless.h> | ||
56 | #include <linux/slab.h> | ||
57 | #include <linux/random.h> | ||
58 | |||
59 | #include "version.h" | ||
60 | #include "wlan_compat.h" | ||
61 | |||
62 | // #define WEP_DEBUG | ||
63 | |||
64 | /*================================================================*/ | ||
65 | /* Project Includes */ | ||
66 | |||
67 | #include "version.h" | ||
68 | #include "p80211hdr.h" | ||
69 | #include "p80211types.h" | ||
70 | #include "p80211msg.h" | ||
71 | #include "p80211conv.h" | ||
72 | #include "p80211netdev.h" | ||
73 | |||
74 | /*================================================================*/ | ||
75 | /* Local Constants */ | ||
76 | |||
77 | #define SSWAP(a,b) {UINT8 tmp = s[a]; s[a] = s[b]; s[b] = tmp;} | ||
78 | #define WEP_KEY(x) (((x) & 0xC0) >> 6) | ||
79 | |||
80 | /*================================================================*/ | ||
81 | /* Local Macros */ | ||
82 | |||
83 | |||
84 | /*================================================================*/ | ||
85 | /* Local Types */ | ||
86 | |||
87 | |||
88 | /*================================================================*/ | ||
89 | /* Local Static Definitions */ | ||
90 | |||
91 | static const UINT32 wep_crc32_table[256] = { | ||
92 | 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L, | ||
93 | 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L, | ||
94 | 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L, | ||
95 | 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL, | ||
96 | 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L, | ||
97 | 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L, | ||
98 | 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L, | ||
99 | 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL, | ||
100 | 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L, | ||
101 | 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL, | ||
102 | 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L, | ||
103 | 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L, | ||
104 | 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L, | ||
105 | 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL, | ||
106 | 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL, | ||
107 | 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L, | ||
108 | 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL, | ||
109 | 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L, | ||
110 | 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L, | ||
111 | 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L, | ||
112 | 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL, | ||
113 | 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L, | ||
114 | 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L, | ||
115 | 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL, | ||
116 | 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L, | ||
117 | 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L, | ||
118 | 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L, | ||
119 | 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L, | ||
120 | 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L, | ||
121 | 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL, | ||
122 | 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL, | ||
123 | 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L, | ||
124 | 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L, | ||
125 | 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL, | ||
126 | 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL, | ||
127 | 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L, | ||
128 | 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL, | ||
129 | 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L, | ||
130 | 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL, | ||
131 | 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L, | ||
132 | 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL, | ||
133 | 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L, | ||
134 | 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L, | ||
135 | 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL, | ||
136 | 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L, | ||
137 | 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L, | ||
138 | 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, | ||
139 | 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L, | ||
140 | 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L, | ||
141 | 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L, | ||
142 | 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, | ||
143 | 0x2d02ef8dL | ||
144 | }; | ||
145 | |||
146 | /*================================================================*/ | ||
147 | /* Local Function Declarations */ | ||
148 | |||
149 | /*================================================================*/ | ||
150 | /* Function Definitions */ | ||
151 | |||
152 | /* keylen in bytes! */ | ||
153 | |||
154 | int wep_change_key(wlandevice_t *wlandev, int keynum, UINT8* key, int keylen) | ||
155 | { | ||
156 | if (keylen < 0) return -1; | ||
157 | if (keylen >= MAX_KEYLEN) return -1; | ||
158 | if (key == NULL) return -1; | ||
159 | if (keynum < 0) return -1; | ||
160 | if (keynum >= NUM_WEPKEYS) return -1; | ||
161 | |||
162 | |||
163 | #ifdef WEP_DEBUG | ||
164 | printk(KERN_DEBUG "WEP key %d len %d = %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n", keynum, keylen, key[0], key[1], key[2], key[3], key[4], key[5], key[6], key[7]); | ||
165 | #endif | ||
166 | |||
167 | wlandev->wep_keylens[keynum] = keylen; | ||
168 | memcpy(wlandev->wep_keys[keynum], key, keylen); | ||
169 | |||
170 | return 0; | ||
171 | } | ||
172 | |||
173 | /* | ||
174 | 4-byte IV at start of buffer, 4-byte ICV at end of buffer. | ||
175 | if successful, buf start is payload begin, length -= 8; | ||
176 | */ | ||
177 | int wep_decrypt(wlandevice_t *wlandev, UINT8 *buf, UINT32 len, int key_override, UINT8 *iv, UINT8 *icv) | ||
178 | { | ||
179 | UINT32 i, j, k, crc, keylen; | ||
180 | UINT8 s[256], key[64], c_crc[4]; | ||
181 | UINT8 keyidx; | ||
182 | |||
183 | /* Needs to be at least 8 bytes of payload */ | ||
184 | if (len <= 0) return -1; | ||
185 | |||
186 | /* initialize the first bytes of the key from the IV */ | ||
187 | key[0] = iv[0]; | ||
188 | key[1] = iv[1]; | ||
189 | key[2] = iv[2]; | ||
190 | keyidx = WEP_KEY(iv[3]); | ||
191 | |||
192 | if (key_override >= 0) | ||
193 | keyidx = key_override; | ||
194 | |||
195 | if (keyidx >= NUM_WEPKEYS) return -2; | ||
196 | |||
197 | keylen = wlandev->wep_keylens[keyidx]; | ||
198 | |||
199 | if (keylen == 0) return -3; | ||
200 | |||
201 | /* copy the rest of the key over from the designated key */ | ||
202 | memcpy(key+3, wlandev->wep_keys[keyidx], keylen); | ||
203 | |||
204 | keylen+=3; /* add in IV bytes */ | ||
205 | |||
206 | #ifdef WEP_DEBUG | ||
207 | printk(KERN_DEBUG "D %d: %02x %02x %02x (%d %d) %02x:%02x:%02x:%02x:%02x\n", len, key[0], key[1], key[2], keyidx, keylen, key[3], key[4], key[5], key[6], key[7]); | ||
208 | #endif | ||
209 | |||
210 | /* set up the RC4 state */ | ||
211 | for (i = 0; i < 256; i++) | ||
212 | s[i] = i; | ||
213 | j = 0; | ||
214 | for (i = 0; i < 256; i++) { | ||
215 | j = (j + s[i] + key[i % keylen]) & 0xff; | ||
216 | SSWAP(i,j); | ||
217 | } | ||
218 | |||
219 | /* Apply the RC4 to the data, update the CRC32 */ | ||
220 | crc = ~0; | ||
221 | i = j = 0; | ||
222 | for (k = 0; k < len; k++) { | ||
223 | i = (i+1) & 0xff; | ||
224 | j = (j+s[i]) & 0xff; | ||
225 | SSWAP(i,j); | ||
226 | buf[k] ^= s[(s[i] + s[j]) & 0xff]; | ||
227 | crc = wep_crc32_table[(crc ^ buf[k]) & 0xff] ^ (crc >> 8); | ||
228 | } | ||
229 | crc = ~crc; | ||
230 | |||
231 | /* now let's check the crc */ | ||
232 | c_crc[0] = crc; | ||
233 | c_crc[1] = crc >> 8; | ||
234 | c_crc[2] = crc >> 16; | ||
235 | c_crc[3] = crc >> 24; | ||
236 | |||
237 | for (k = 0; k < 4; k++) { | ||
238 | i = (i + 1) & 0xff; | ||
239 | j = (j+s[i]) & 0xff; | ||
240 | SSWAP(i,j); | ||
241 | if ((c_crc[k] ^ s[(s[i] + s[j]) & 0xff]) != icv[k]) | ||
242 | return -(4 | (k << 4)) ; /* ICV mismatch */ | ||
243 | } | ||
244 | |||
245 | return 0; | ||
246 | } | ||
247 | |||
248 | /* encrypts in-place. */ | ||
249 | int wep_encrypt(wlandevice_t *wlandev, UINT8 *buf, UINT8 *dst, UINT32 len, int keynum, UINT8 *iv, UINT8 *icv) | ||
250 | { | ||
251 | UINT32 i, j, k, crc, keylen; | ||
252 | UINT8 s[256], key[64]; | ||
253 | |||
254 | /* no point in WEPping an empty frame */ | ||
255 | if (len <= 0) return -1; | ||
256 | |||
257 | /* we need to have a real key.. */ | ||
258 | if (keynum >= NUM_WEPKEYS) return -2; | ||
259 | keylen = wlandev->wep_keylens[keynum]; | ||
260 | if (keylen <= 0) return -3; | ||
261 | |||
262 | /* use a random IV. And skip known weak ones. */ | ||
263 | get_random_bytes(iv, 3); | ||
264 | while ((iv[1] == 0xff) && (iv[0] >= 3) && (iv[0] < keylen)) | ||
265 | get_random_bytes(iv, 3); | ||
266 | |||
267 | iv[3] = (keynum & 0x03) << 6; | ||
268 | |||
269 | key[0] = iv[0]; | ||
270 | key[1] = iv[1]; | ||
271 | key[2] = iv[2]; | ||
272 | |||
273 | /* copy the rest of the key over from the designated key */ | ||
274 | memcpy(key+3, wlandev->wep_keys[keynum], keylen); | ||
275 | |||
276 | keylen+=3; /* add in IV bytes */ | ||
277 | |||
278 | #ifdef WEP_DEBUG | ||
279 | printk(KERN_DEBUG "E %d (%d/%d %d) %02x %02x %02x %02x:%02x:%02x:%02x:%02x\n", len, iv[3], keynum, keylen, key[0], key[1], key[2], key[3], key[4], key[5], key[6], key[7]); | ||
280 | #endif | ||
281 | |||
282 | /* set up the RC4 state */ | ||
283 | for (i = 0; i < 256; i++) | ||
284 | s[i] = i; | ||
285 | j = 0; | ||
286 | for (i = 0; i < 256; i++) { | ||
287 | j = (j + s[i] + key[i % keylen]) & 0xff; | ||
288 | SSWAP(i,j); | ||
289 | } | ||
290 | |||
291 | /* Update CRC32 then apply RC4 to the data */ | ||
292 | crc = ~0; | ||
293 | i = j = 0; | ||
294 | for (k = 0; k < len; k++) { | ||
295 | crc = wep_crc32_table[(crc ^ buf[k]) & 0xff] ^ (crc >> 8); | ||
296 | i = (i+1) & 0xff; | ||
297 | j = (j+s[i]) & 0xff; | ||
298 | SSWAP(i,j); | ||
299 | dst[k] = buf[k] ^ s[(s[i] + s[j]) & 0xff]; | ||
300 | } | ||
301 | crc = ~crc; | ||
302 | |||
303 | /* now let's encrypt the crc */ | ||
304 | icv[0] = crc; | ||
305 | icv[1] = crc >> 8; | ||
306 | icv[2] = crc >> 16; | ||
307 | icv[3] = crc >> 24; | ||
308 | |||
309 | for (k = 0; k < 4; k++) { | ||
310 | i = (i + 1) & 0xff; | ||
311 | j = (j+s[i]) & 0xff; | ||
312 | SSWAP(i,j); | ||
313 | icv[k] ^= s[(s[i] + s[j]) & 0xff]; | ||
314 | } | ||
315 | |||
316 | return 0; | ||
317 | } | ||