drivers/usb/net/Zydas/zdencrypt.c

   1 #ifndef _ZD_ENCRYPT_C
   2 #define _ZD_ENCRYPT_C
   3
   4 #if defined(PHY_1202)
   5 #include "zd80211.h"
   6
   7 const unsigned int crc32_tab[] = {
   8        0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
   9        0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
  10        0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
  11        0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
  12        0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
  13        0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
  14        0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
  15        0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
  16        0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
  17        0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
  18        0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
  19        0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
  20        0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
  21        0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
  22        0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
  23        0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
  24        0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
  25        0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
  26        0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
  27        0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
  28        0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
  29        0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
  30        0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
  31        0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
  32        0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
  33        0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
  34        0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
  35        0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
  36        0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
  37        0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
  38        0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
  39        0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
  40        0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
  41        0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
  42        0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
  43        0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
  44        0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
  45        0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
  46        0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
  47        0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
  48        0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
  49        0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
  50        0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
  51        0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
  52        0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
  53        0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
  54        0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
  55        0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
  56        0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
  57        0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
  58        0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
  59        0x2d02ef8dL
  60 };
  61
  62
  63 U8 S[256];
  64 void initWepState(void)
  65 {
  66         int i;
  67
  68         for (i=0; i<256; i++){
  69                 S[i] = i;
  70         }
  71 }
  72
  73
  74 void zd_EncryptData (
  75         U8              Wep_Key_Len,
  76     U8*         Wep_Key,
  77     U8*         Wep_Iv,
  78     U16         Num_Bytes,
  79     U8*         Inbuf,
  80     U8*         Outbuf,
  81     U32*        Icv)
  82 {
  83         U8  S2[256], Se[256];
  84         register U16 ui;
  85         register U16 i;
  86         register U16 j;
  87         register U8  temp;
  88         U8  keylen = Wep_Key_Len + 3;
  89         U8  K;
  90         U8  *In = Inbuf;
  91         U8  *Out = Outbuf;
  92         U32 ltemp;
  93
  94     for (i=0; i<256; i++){
  95         if ((i&(keylen-1)) < 3)
  96             S2[i] = Wep_Iv[i & (keylen-1)];
  97         else
  98             S2[i] = Wep_Key[(i & (keylen-1)) - 3];
  99     }
 100
 101     memcpy(Se, S, 256);
 102
 103     j = 0;
 104     for (i=0; i<256; i++){
 105             j = (j + Se[i] + S2[i]) ;
 106         j &= 255 ;
 107
 108         // Swap S[i] and S[j]
 109         temp = Se[i];
 110         Se[i] = Se[j];
 111         Se[j] = temp;
 112     }
 113
 114     i = j = 0;
 115     *Icv = -1;
 116     for (ui=0; ui<Num_Bytes; ui++){
 117         i++;
 118         i &= 255;
 119         j += Se[i];
 120         j &= 255;
 121
 122         // Swap S[i] and S[j]
 123         temp = Se[i];
 124         Se[i] = Se[j];
 125         Se[j] = temp;
 126 //          temp = (S[i] + temp) & 255;
 127         temp += Se[i];
 128         temp &= 255;
 129         K = Se[temp];        // Key used to Xor with input data
 130
 131         *Icv =  (*Icv >> 8) ^ crc32_tab[(*Icv ^ *In) & 0xff];
 132
 133         *Out = *In ^ K;                 // XOR
 134         In++;
 135         Out++;
 136     } //End of for (ui = 0; ui < Num_Bytes; ui++)
 137
 138     *Icv = ~(*Icv);
 139     ltemp = *Icv;
 140     for (ui=0; ui<4; ui++){
 141         i ++;
 142         i &= 255;
 143         j += Se[i];
 144         j &= 255;
 145
 146         // Swap S[i] and S[j]
 147         temp = Se[i];
 148         Se[i] = Se[j];
 149         Se[j] = temp;
 150         temp += Se[i];
 151         temp &= 255;
 152         K = Se[temp];        // Key used to Xor with input data
 153
 154         *Out++ = (U8) (ltemp ^ K) & 0xff;
 155         ltemp >>= 8;
 156     }
 157 }
 158
 159
 160 BOOLEAN zd_DecryptData (
 161         U8              Wep_Key_Len,
 162         U8*     Wep_Key,
 163         U8*     Wep_Iv,
 164         U16     Num_Bytes,      //include IVC
 165         U8*     Inbuf,
 166         U8*     Outbuf,         //the same with InBuf
 167         U32*    Icv)
 168 {
 169         U8   S2[256], Sd[256];
 170         register U16  ui;
 171         register U16  i;
 172         register U16  j;
 173         U8   keylen = Wep_Key_Len + 3;
 174         register U8   temp;
 175         U8   K;
 176         U8   *In = Inbuf;
 177         U8   *Out = Outbuf;
 178
 179         for (i=0; i<256; i++){
 180         if ((i&(keylen-1)) < 3)
 181                 S2[i] = Wep_Iv[i&(keylen-1)];
 182         else
 183             S2[i] = Wep_Key[(i&(keylen-1))-3];
 184     }
 185
 186     memcpy(Sd, S, 256);
 187
 188     j = 0;
 189     for (i=0; i<256; i++){
 190         j = (j + Sd[i] + S2[i]) & 255;
 191         // Swap S[i] and S[j]
 192         temp = Sd[i];
 193         Sd[i] = Sd[j];
 194         Sd[j] = temp;
 195     }
 196
 197     i = j = 0;
 198     // Decrypt Decrypted Data and Decrypted ICV
 199     for (ui = 0; ui < Num_Bytes; ui++){
 200         i++;
 201         i &= 255;
 202         j += Sd[i];
 203         j &= 255;
 204
 205         // Swap S[i] and S[j]
 206         temp = Sd[i];
 207         Sd[i] = Sd[j];
 208         Sd[j] = temp;
 209         temp += Sd[i];
 210         temp &= 255;
 211         K = Sd[temp];        // Key used to Xor with input data
 212
 213         *Out = *In ^ K;     // decrypt
 214         In++;
 215         Out++;
 216     } //End of for (ui = 0; ui < Num_Bytes; ui++)
 217
 218     // Inverse Decrypted ICV
 219     Outbuf[Num_Bytes-4] = ~Outbuf[Num_Bytes-4];
 220     Outbuf[Num_Bytes-3] = ~Outbuf[Num_Bytes-3];
 221     Outbuf[Num_Bytes-2] = ~Outbuf[Num_Bytes-2];
 222     Outbuf[Num_Bytes-1] = ~Outbuf[Num_Bytes-1];
 223
 224     //Check ICV
 225     *Icv = -1;
 226     for (ui = 0; ui < Num_Bytes; ui++){
 227         *Icv = (*Icv>>8) ^ crc32_tab[(*Icv ^ Outbuf[ui]) & 0xff];
 228     }
 229
 230     if (*Icv == 0)
 231         return 1;
 232     else
 233        return 0;
 234 }
 235 #endif
 236 #endif