diff options
Diffstat (limited to 'drivers/staging/otus/80211core/cwep.c')
-rw-r--r-- | drivers/staging/otus/80211core/cwep.c | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/drivers/staging/otus/80211core/cwep.c b/drivers/staging/otus/80211core/cwep.c new file mode 100644 index 00000000000..ec31bb1ac28 --- /dev/null +++ b/drivers/staging/otus/80211core/cwep.c @@ -0,0 +1,299 @@ +/* + * Copyright (c) 2007-2008 Atheros Communications Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ +/* */ +/* Module Name : cwep.c */ +/* */ +/* Abstract */ +/* This module contains Tx and Rx functions. */ +/* */ +/* NOTES */ +/* None */ +/* */ +/************************************************************************/ +#include "cprecomp.h" + +u32_t crc32_tab[] = +{ + 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L, + 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L, + 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L, + 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL, + 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L, + 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L, + 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L, + 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL, + 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L, + 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL, + 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L, + 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L, + 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L, + 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL, + 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL, + 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L, + 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL, + 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L, + 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L, + 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L, + 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL, + 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L, + 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L, + 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL, + 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L, + 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L, + 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L, + 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L, + 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L, + 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL, + 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL, + 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L, + 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L, + 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL, + 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL, + 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L, + 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL, + 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L, + 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL, + 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L, + 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL, + 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L, + 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L, + 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL, + 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L, + 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L, + 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, + 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L, + 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L, + 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L, + 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, + 0x2d02ef8dL +}; + +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) +{ + u8_t S[256],S2[256]; + u16_t ui; + u16_t i; + u16_t j; + u8_t temp; + u8_t K; + u32_t ltemp; + u16_t len; + u32_t icv; + u8_t key[32]; + + key[0] = iv[0]; + key[1] = iv[1]; + key[2] = iv[2]; + + /* Append Wep Key after IV */ + zfMemoryCopy(&key[3], WepKey, keyLen); + + keyLen += 3; + + for(i = 0; i < 256; i++) + { + S[i] = (u8_t)i; + S2[i] = key[i&(keyLen-1)]; + } + + j = 0; + for(i = 0; i < 256; i++) + { + j = (j + S[i] + S2[i]) ; + j&=255 ; + + // Swap S[i] and S[j] + temp = S[i]; + S[i] = S[j]; + S[j] = temp; + } + + i = j = 0; + icv = -1; + + /* For Snap Header */ + for (ui = 0; ui < snapLen; ui++) + { + u8_t In; + + i++; + i &= 255; + j += S[i]; + j &= 255; + + // Swap S[i] and S[j] + temp = S[i]; + S[i] = S[j]; + S[j] = temp; +// temp = (S[i] + temp) & 255; + temp += S[i]; + temp &=255; + K = S[temp]; // Key used to Xor with input data + + In = snap[ui]; + icv = (icv>>8) ^ crc32_tab[(icv^In)&0xff]; + + snap[ui] = In ^ K; + //zmw_tx_buf_writeb(dev, buf, ui, In ^ K); + } + + len = zfwBufGetSize(dev, buf); + + for (ui = offset; ui < len; ui++) + { + u8_t In; + + i++; + i &= 255; + j += S[i]; + j &= 255; + + // Swap S[i] and S[j] + temp = S[i]; + S[i] = S[j]; + S[j] = temp; +// temp = (S[i] + temp) & 255; + temp += S[i]; + temp &=255; + K = S[temp]; // Key used to Xor with input data + + In = zmw_tx_buf_readb(dev, buf, ui); + icv = (icv>>8) ^ crc32_tab[(icv^In)&0xff]; + + zmw_tx_buf_writeb(dev, buf, ui, In ^ K); + } //End of for (ui = 0; ui < Num_Bytes; ui++) + + icv = ~(icv); + ltemp = (u32_t) icv; + + for (ui = 0; ui < 4; ui++) + { + i ++; + i &= 255; + j += S[i]; + j &= 255; + + // Swap S[i] and S[j] + temp = S[i]; + S[i] = S[j]; + S[j] = temp; + temp += S[i]; + temp &= 255; + K = S[temp]; // Key used to Xor with input data + + //*Out++ = (u8_t)(ltemp ^ K)&0xff; + zmw_tx_buf_writeb(dev, buf, len+ui, (u8_t)(ltemp ^ K)&0xff); + ltemp >>= 8; + } + + zfwBufSetSize(dev, buf, len+4); +} + +u16_t zfWEPDecrypt(zdev_t *dev, zbuf_t *buf, u16_t offset, u8_t keyLen, u8_t* WepKey, u8_t *iv) +{ + u8_t S[256]; + u8_t S2[256]; + u16_t ui; + u16_t i; + u16_t j; + u32_t icv_tmp; + u32_t *icv; + u32_t rxbuf_icv; + u8_t temp; + u8_t K; + u16_t len; + u8_t key[32]; + + /* Retrieve IV */ + key[0] = iv[0]; + key[1] = iv[1]; + key[2] = iv[2]; + + /* Append Wep Key after IV */ + zfMemoryCopy(&key[3], WepKey, keyLen); + + keyLen += 3; + + for(i = 0; i < 256; i++) + { + S[i] = (u8_t)i; + S2[i] = key[i&(keyLen-1)]; + } + + j = 0; + for(i = 0; i < 256; i++) + { + j = (j + S[i] + S2[i]); + j&=255 ; + + // Swap S[i] and S[j] + temp = S[i]; + S[i] = S[j]; + S[j] = temp; + } + + i = j = 0; + + len = zfwBufGetSize(dev, buf); + + for (ui = offset; ui < len; ui++) + { + u8_t In; + + i++; + i &= 255; + j += S[i]; + j &= 255; + + // Swap S[i] and S[j] + temp = S[i]; + S[i] = S[j]; + S[j] = temp; +// temp = (S[i] + temp) & 255; + temp += S[i]; + temp &=255; + K = S[temp]; // Key used to Xor with input data + + In = zmw_rx_buf_readb(dev, buf, ui); + + zmw_rx_buf_writeb(dev, buf, ui, In ^ K); + } //End of for (ui = 0; ui < Num_Bytes; ui++) + + icv = &icv_tmp; + *icv = -1; + + for (ui = offset; ui < len - 4; ui++) + { + u8_t In; + + In = zmw_rx_buf_readb(dev, buf, ui); + *icv = (*icv>>8) ^ crc32_tab[(*icv^In)&0xff]; + } + + *icv = ~*icv; + + rxbuf_icv = (zmw_rx_buf_readb(dev, buf, len-4) | + zmw_rx_buf_readb(dev, buf, len-3) << 8 | + zmw_rx_buf_readb(dev, buf, len-2) << 16 | + zmw_rx_buf_readb(dev, buf, len-1) << 24); + + if (*icv != rxbuf_icv) + { + return ZM_ICV_FAILURE; + } + + return ZM_ICV_SUCCESS; +} |