2 * Copyright (c) 2007-2008 Atheros Communications Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 /* Module Name : cwep.c */
20 /* This module contains Tx and Rx functions. */
25 /************************************************************************/
30 0x00000000L
, 0x77073096L
, 0xee0e612cL
, 0x990951baL
, 0x076dc419L
,
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,
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,
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53 0xc90c2086L
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54 0x5edef90eL
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55 0x2eb40d81L
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,
56 0x03b6e20cL
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,
57 0x73dc1683L
, 0xe3630b12L
, 0x94643b84L
, 0x0d6d6a3eL
, 0x7a6a5aa8L
,
58 0xe40ecf0bL
, 0x9309ff9dL
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, 0x7d079eb1L
, 0xf00f9344L
,
59 0x8708a3d2L
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, 0x806567cbL
,
60 0x196c3671L
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,
61 0x67dd4accL
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62 0xd6d6a3e8L
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,
63 0xa6bc5767L
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,
64 0x36034af6L
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65 0x4669be79L
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66 0xcc0c7795L
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67 0xb2bd0b28L
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68 0x2cd99e8bL
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,
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,
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,
84 void zfWEPEncrypt(zdev_t
*dev
, zbuf_t
*buf
, u8_t
*snap
, u16_t snapLen
, u16_t offset
, u8_t keyLen
, u8_t
* WepKey
, u8_t
*iv
)
101 /* Append Wep Key after IV */
102 zfMemoryCopy(&key
[3], WepKey
, keyLen
);
106 for(i
= 0; i
< 256; i
++)
109 S2
[i
] = key
[i
&(keyLen
-1)];
113 for(i
= 0; i
< 256; i
++)
115 j
= (j
+ S
[i
] + S2
[i
]) ;
118 // Swap S[i] and S[j]
127 /* For Snap Header */
128 for (ui
= 0; ui
< snapLen
; ui
++)
137 // Swap S[i] and S[j]
141 // temp = (S[i] + temp) & 255;
144 K
= S
[temp
]; // Key used to Xor with input data
147 icv
= (icv
>>8) ^ crc32_tab
[(icv
^In
)&0xff];
150 //zmw_tx_buf_writeb(dev, buf, ui, In ^ K);
153 len
= zfwBufGetSize(dev
, buf
);
155 for (ui
= offset
; ui
< len
; ui
++)
164 // Swap S[i] and S[j]
168 // temp = (S[i] + temp) & 255;
171 K
= S
[temp
]; // Key used to Xor with input data
173 In
= zmw_tx_buf_readb(dev
, buf
, ui
);
174 icv
= (icv
>>8) ^ crc32_tab
[(icv
^In
)&0xff];
176 zmw_tx_buf_writeb(dev
, buf
, ui
, In
^ K
);
177 } //End of for (ui = 0; ui < Num_Bytes; ui++)
182 for (ui
= 0; ui
< 4; ui
++)
189 // Swap S[i] and S[j]
195 K
= S
[temp
]; // Key used to Xor with input data
197 //*Out++ = (u8_t)(ltemp ^ K)&0xff;
198 zmw_tx_buf_writeb(dev
, buf
, len
+ui
, (u8_t
)(ltemp
^ K
)&0xff);
202 zfwBufSetSize(dev
, buf
, len
+4);
205 u16_t
zfWEPDecrypt(zdev_t
*dev
, zbuf_t
*buf
, u16_t offset
, u8_t keyLen
, u8_t
* WepKey
, u8_t
*iv
)
225 /* Append Wep Key after IV */
226 zfMemoryCopy(&key
[3], WepKey
, keyLen
);
230 for(i
= 0; i
< 256; i
++)
233 S2
[i
] = key
[i
&(keyLen
-1)];
237 for(i
= 0; i
< 256; i
++)
239 j
= (j
+ S
[i
] + S2
[i
]);
242 // Swap S[i] and S[j]
250 len
= zfwBufGetSize(dev
, buf
);
252 for (ui
= offset
; ui
< len
; ui
++)
261 // Swap S[i] and S[j]
265 // temp = (S[i] + temp) & 255;
268 K
= S
[temp
]; // Key used to Xor with input data
270 In
= zmw_rx_buf_readb(dev
, buf
, ui
);
272 zmw_rx_buf_writeb(dev
, buf
, ui
, In
^ K
);
273 } //End of for (ui = 0; ui < Num_Bytes; ui++)
278 for (ui
= offset
; ui
< len
- 4; ui
++)
282 In
= zmw_rx_buf_readb(dev
, buf
, ui
);
283 *icv
= (*icv
>>8) ^ crc32_tab
[(*icv
^In
)&0xff];
288 rxbuf_icv
= (zmw_rx_buf_readb(dev
, buf
, len
-4) |
289 zmw_rx_buf_readb(dev
, buf
, len
-3) << 8 |
290 zmw_rx_buf_readb(dev
, buf
, len
-2) << 16 |
291 zmw_rx_buf_readb(dev
, buf
, len
-1) << 24);
293 if (*icv
!= rxbuf_icv
)
295 return ZM_ICV_FAILURE
;
298 return ZM_ICV_SUCCESS
;