workbench/devs/networks/atheros5000/encryption.c

   1 /*
   2
   3 Copyright (C) 2011 Neil Cafferkey
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful, but
  11 WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13 General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  18 MA 02111-1307, USA.
  19
  20 */
  21
  22
  23 #include <proto/exec.h>
  24
  25 #include "device.h"
  26
  27 #include "encryption_protos.h"
  28
  29 static VOID WEPEncrypt(struct DevUnit *unit, const UBYTE *data, UWORD size,
  30    UBYTE *buffer, BOOL iv_only, struct DevBase *base);
  31 static BOOL WEPDecrypt(struct DevUnit *unit, const UBYTE *data, UWORD size,
  32    UBYTE *buffer, struct DevBase *base);
  33 static VOID TKIPEncrypt(struct DevUnit *unit, UBYTE *data, UWORD size,
  34    UBYTE *buffer, BOOL iv_only, struct DevBase *base);
  35 static BOOL TKIPDecrypt(struct DevUnit *unit, UBYTE *data, UWORD size,
  36    UBYTE *buffer, BOOL iv_only, struct DevBase *base);
  37 static VOID CCMPSetIV(struct DevUnit *unit, UBYTE *data, UBYTE *buffer,
  38    struct DevBase *base);
  39 static VOID CCMPEncrypt(struct DevUnit *unit, const UBYTE *header,
  40    const UBYTE *data, UWORD size, UBYTE *buffer, struct DevBase *base);
  41 static BOOL CCMPCheckIV(struct DevUnit *unit, UBYTE *data, UWORD *key_no,
  42    struct DevBase *base);
  43 static BOOL CCMPDecrypt(struct DevUnit *unit, const UBYTE *header,
  44    const UBYTE *data, UWORD size, UBYTE *buffer, UWORD key_no,
  45    struct DevBase *base);
  46 VOID UpdateMIC(ULONG *left, ULONG *right, const ULONG *data,
  47    ULONG count);
  48 static VOID TKIPKeyMix1(UWORD *ttak, const UWORD *tk, const UWORD *ta,
  49    ULONG iv_high, struct DevBase *base);
  50 VOID TKIPKeyMix2(UBYTE *rc4_seed, const UWORD *ttak, const UWORD *tk,
  51    UWORD iv16, struct DevBase *base);
  52 VOID EOREncrypt(const ULONG *data, ULONG *buffer, ULONG *key,
  53    struct DevBase *base);
  54 static VOID AESKeyMix(ULONG *stream, const ULONG *key,
  55    struct DevBase *base);
  56 VOID AESEncrypt(const ULONG *data, ULONG *buffer, ULONG *key,
  57    struct DevBase *base);
  58
  59
  60 static const UBYTE mic_padding[] =
  61    {0x5a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
  62
  63
  64 const UWORD sbox[] =
  65 {
  66    0xC6A5, 0xF884, 0xEE99, 0xF68D, 0xFF0D, 0xD6BD, 0xDEB1, 0x9154,
  67    0x6050, 0x0203, 0xCEA9, 0x567D, 0xE719, 0xB562, 0x4DE6, 0xEC9A,
  68    0x8F45, 0x1F9D, 0x8940, 0xFA87, 0xEF15, 0xB2EB, 0x8EC9, 0xFB0B,
  69    0x41EC, 0xB367, 0x5FFD, 0x45EA, 0x23BF, 0x53F7, 0xE496, 0x9B5B,
  70    0x75C2, 0xE11C, 0x3DAE, 0x4C6A, 0x6C5A, 0x7E41, 0xF502, 0x834F,
  71    0x685C, 0x51F4, 0xD134, 0xF908, 0xE293, 0xAB73, 0x6253, 0x2A3F,
  72    0x080C, 0x9552, 0x4665, 0x9D5E, 0x3028, 0x37A1, 0x0A0F, 0x2FB5,
  73    0x0E09, 0x2436, 0x1B9B, 0xDF3D, 0xCD26, 0x4E69, 0x7FCD, 0xEA9F,
  74    0x121B, 0x1D9E, 0x5874, 0x342E, 0x362D, 0xDCB2, 0xB4EE, 0x5BFB,
  75    0xA4F6, 0x764D, 0xB761, 0x7DCE, 0x527B, 0xDD3E, 0x5E71, 0x1397,
  76    0xA6F5, 0xB968, 0x0000, 0xC12C, 0x4060, 0xE31F, 0x79C8, 0xB6ED,
  77    0xD4BE, 0x8D46, 0x67D9, 0x724B, 0x94DE, 0x98D4, 0xB0E8, 0x854A,
  78    0xBB6B, 0xC52A, 0x4FE5, 0xED16, 0x86C5, 0x9AD7, 0x6655, 0x1194,
  79    0x8ACF, 0xE910, 0x0406, 0xFE81, 0xA0F0, 0x7844, 0x25BA, 0x4BE3,
  80    0xA2F3, 0x5DFE, 0x80C0, 0x058A, 0x3FAD, 0x21BC, 0x7048, 0xF104,
  81    0x63DF, 0x77C1, 0xAF75, 0x4263, 0x2030, 0xE51A, 0xFD0E, 0xBF6D,
  82    0x814C, 0x1814, 0x2635, 0xC32F, 0xBEE1, 0x35A2, 0x88CC, 0x2E39,
  83    0x9357, 0x55F2, 0xFC82, 0x7A47, 0xC8AC, 0xBAE7, 0x322B, 0xE695,
  84    0xC0A0, 0x1998, 0x9ED1, 0xA37F, 0x4466, 0x547E, 0x3BAB, 0x0B83,
  85    0x8CCA, 0xC729, 0x6BD3, 0x283C, 0xA779, 0xBCE2, 0x161D, 0xAD76,
  86    0xDB3B, 0x6456, 0x744E, 0x141E, 0x92DB, 0x0C0A, 0x486C, 0xB8E4,
  87    0x9F5D, 0xBD6E, 0x43EF, 0xC4A6, 0x39A8, 0x31A4, 0xD337, 0xF28B,
  88    0xD532, 0x8B43, 0x6E59, 0xDAB7, 0x018C, 0xB164, 0x9CD2, 0x49E0,
  89    0xD8B4, 0xACFA, 0xF307, 0xCF25, 0xCAAF, 0xF48E, 0x47E9, 0x1018,
  90    0x6FD5, 0xF088, 0x4A6F, 0x5C72, 0x3824, 0x57F1, 0x73C7, 0x9751,
  91    0xCB23, 0xA17C, 0xE89C, 0x3E21, 0x96DD, 0x61DC, 0x0D86, 0x0F85,
  92    0xE090, 0x7C42, 0x71C4, 0xCCAA, 0x90D8, 0x0605, 0xF701, 0x1C12,
  93    0xC2A3, 0x6A5F, 0xAEF9, 0x69D0, 0x1791, 0x9958, 0x3A27, 0x27B9,
  94    0xD938, 0xEB13, 0x2BB3, 0x2233, 0xD2BB, 0xA970, 0x0789, 0x33A7,
  95    0x2DB6, 0x3C22, 0x1592, 0xC920, 0x8749, 0xAAFF, 0x5078, 0xA57A,
  96    0x038F, 0x59F8, 0x0980, 0x1A17, 0x65DA, 0xD731, 0x84C6, 0xD0B8,
  97    0x82C3, 0x29B0, 0x5A77, 0x1E11, 0x7BCB, 0xA8FC, 0x6DD6, 0x2C3A
  98 };
  99
 100
 101 const ULONG crc32[] =
 102 {
 103    0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
 104    0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
 105    0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
 106    0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
 107    0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
 108    0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
 109    0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
 110    0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
 111    0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
 112    0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
 113    0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
 114    0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
 115    0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
 116    0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
 117    0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
 118    0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
 119    0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
 120    0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
 121    0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
 122    0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
 123    0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
 124    0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
 125    0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
 126    0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
 127    0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
 128    0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
 129    0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
 130    0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
 131    0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
 132    0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
 133    0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
 134    0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
 135    0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
 136    0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
 137    0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
 138    0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
 139    0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
 140    0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
 141    0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
 142    0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
 143    0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
 144    0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
 145    0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
 146    0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
 147    0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
 148    0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
 149    0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
 150    0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
 151    0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
 152    0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
 153    0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
 154    0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
 155    0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
 156    0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
 157    0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
 158    0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
 159    0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
 160    0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
 161    0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
 162    0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
 163    0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
 164    0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
 165    0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
 166    0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
 167 };
 168
 169
 170 #define SBox(A) \
 171    ({ \
 172       UWORD _SBox_A = (A); \
 173       UBYTE _SBox_low = _SBox_A; \
 174       UBYTE _SBox_high = _SBox_A >> 8; \
 175       _SBox_A = sbox[_SBox_low] ^ FlipWord(sbox[_SBox_high]); \
 176    })
 177
 178
 179 const ULONG te0[] =
 180 {
 181    0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d,
 182    0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554,
 183    0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d,
 184    0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a,
 185    0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87,
 186    0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b,
 187    0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea,
 188    0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b,
 189    0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a,
 190    0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f,
 191    0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108,
 192    0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f,
 193    0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e,
 194    0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5,
 195    0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d,
 196    0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f,
 197    0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e,
 198    0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb,
 199    0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce,
 200    0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497,
 201    0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c,
 202    0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed,
 203    0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b,
 204    0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a,
 205    0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16,
 206    0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594,
 207    0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81,
 208    0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3,
 209    0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a,
 210    0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504,
 211    0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163,
 212    0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d,
 213    0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f,
 214    0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739,
 215    0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47,
 216    0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395,
 217    0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f,
 218    0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883,
 219    0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c,
 220    0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76,
 221    0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e,
 222    0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4,
 223    0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6,
 224    0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b,
 225    0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7,
 226    0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0,
 227    0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25,
 228    0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818,
 229    0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72,
 230    0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651,
 231    0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21,
 232    0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85,
 233    0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa,
 234    0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12,
 235    0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0,
 236    0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9,
 237    0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133,
 238    0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7,
 239    0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920,
 240    0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a,
 241    0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17,
 242    0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8,
 243    0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11,
 244    0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a
 245 };
 246
 247
 248 const ULONG te1[] =
 249 {
 250    0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b,
 251    0x0dfff2f2, 0xbdd66b6b, 0xb1de6f6f, 0x5491c5c5,
 252    0x50603030, 0x03020101, 0xa9ce6767, 0x7d562b2b,
 253    0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676,
 254    0x458fcaca, 0x9d1f8282, 0x4089c9c9, 0x87fa7d7d,
 255    0x15effafa, 0xebb25959, 0xc98e4747, 0x0bfbf0f0,
 256    0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf,
 257    0xbf239c9c, 0xf753a4a4, 0x96e47272, 0x5b9bc0c0,
 258    0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626,
 259    0x5a6c3636, 0x417e3f3f, 0x02f5f7f7, 0x4f83cccc,
 260    0x5c683434, 0xf451a5a5, 0x34d1e5e5, 0x08f9f1f1,
 261    0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515,
 262    0x0c080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3,
 263    0x28301818, 0xa1379696, 0x0f0a0505, 0xb52f9a9a,
 264    0x090e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2,
 265    0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575,
 266    0x1b120909, 0x9e1d8383, 0x74582c2c, 0x2e341a1a,
 267    0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0,
 268    0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3,
 269    0x7b522929, 0x3edde3e3, 0x715e2f2f, 0x97138484,
 270    0xf5a65353, 0x68b9d1d1, 0x00000000, 0x2cc1eded,
 271    0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b,
 272    0xbed46a6a, 0x468dcbcb, 0xd967bebe, 0x4b723939,
 273    0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf,
 274    0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb,
 275    0xc5864343, 0xd79a4d4d, 0x55663333, 0x94118585,
 276    0xcf8a4545, 0x10e9f9f9, 0x06040202, 0x81fe7f7f,
 277    0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8,
 278    0xf3a25151, 0xfe5da3a3, 0xc0804040, 0x8a058f8f,
 279    0xad3f9292, 0xbc219d9d, 0x48703838, 0x04f1f5f5,
 280    0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121,
 281    0x30201010, 0x1ae5ffff, 0x0efdf3f3, 0x6dbfd2d2,
 282    0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec,
 283    0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717,
 284    0x5793c4c4, 0xf255a7a7, 0x82fc7e7e, 0x477a3d3d,
 285    0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373,
 286    0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc,
 287    0x66442222, 0x7e542a2a, 0xab3b9090, 0x830b8888,
 288    0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414,
 289    0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb,
 290    0x3bdbe0e0, 0x56643232, 0x4e743a3a, 0x1e140a0a,
 291    0xdb924949, 0x0a0c0606, 0x6c482424, 0xe4b85c5c,
 292    0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262,
 293    0xa8399191, 0xa4319595, 0x37d3e4e4, 0x8bf27979,
 294    0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d,
 295    0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9,
 296    0xb4d86c6c, 0xfaac5656, 0x07f3f4f4, 0x25cfeaea,
 297    0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808,
 298    0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e,
 299    0x24381c1c, 0xf157a6a6, 0xc773b4b4, 0x5197c6c6,
 300    0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f,
 301    0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a,
 302    0x90e07070, 0x427c3e3e, 0xc471b5b5, 0xaacc6666,
 303    0xd8904848, 0x05060303, 0x01f7f6f6, 0x121c0e0e,
 304    0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9,
 305    0x91178686, 0x5899c1c1, 0x273a1d1d, 0xb9279e9e,
 306    0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111,
 307    0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494,
 308    0xb62d9b9b, 0x223c1e1e, 0x92158787, 0x20c9e9e9,
 309    0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf,
 310    0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d,
 311    0xda65bfbf, 0x31d7e6e6, 0xc6844242, 0xb8d06868,
 312    0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f,
 313    0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616
 314 };
 315
 316
 317 const ULONG te2[] =
 318 {
 319    0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b,
 320    0xf20dfff2, 0x6bbdd66b, 0x6fb1de6f, 0xc55491c5,
 321    0x30506030, 0x01030201, 0x67a9ce67, 0x2b7d562b,
 322    0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76,
 323    0xca458fca, 0x829d1f82, 0xc94089c9, 0x7d87fa7d,
 324    0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0,
 325    0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af,
 326    0x9cbf239c, 0xa4f753a4, 0x7296e472, 0xc05b9bc0,
 327    0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26,
 328    0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc,
 329    0x345c6834, 0xa5f451a5, 0xe534d1e5, 0xf108f9f1,
 330    0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15,
 331    0x040c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3,
 332    0x18283018, 0x96a13796, 0x050f0a05, 0x9ab52f9a,
 333    0x07090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2,
 334    0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75,
 335    0x091b1209, 0x839e1d83, 0x2c74582c, 0x1a2e341a,
 336    0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0,
 337    0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3,
 338    0x297b5229, 0xe33edde3, 0x2f715e2f, 0x84971384,
 339    0x53f5a653, 0xd168b9d1, 0x00000000, 0xed2cc1ed,
 340    0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b,
 341    0x6abed46a, 0xcb468dcb, 0xbed967be, 0x394b7239,
 342    0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf,
 343    0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb,
 344    0x43c58643, 0x4dd79a4d, 0x33556633, 0x85941185,
 345    0x45cf8a45, 0xf910e9f9, 0x02060402, 0x7f81fe7f,
 346    0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8,
 347    0x51f3a251, 0xa3fe5da3, 0x40c08040, 0x8f8a058f,
 348    0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5,
 349    0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221,
 350    0x10302010, 0xff1ae5ff, 0xf30efdf3, 0xd26dbfd2,
 351    0xcd4c81cd, 0x0c14180c, 0x13352613, 0xec2fc3ec,
 352    0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17,
 353    0xc45793c4, 0xa7f255a7, 0x7e82fc7e, 0x3d477a3d,
 354    0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673,
 355    0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc,
 356    0x22664422, 0x2a7e542a, 0x90ab3b90, 0x88830b88,
 357    0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814,
 358    0xde79a7de, 0x5ee2bc5e, 0x0b1d160b, 0xdb76addb,
 359    0xe03bdbe0, 0x32566432, 0x3a4e743a, 0x0a1e140a,
 360    0x49db9249, 0x060a0c06, 0x246c4824, 0x5ce4b85c,
 361    0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462,
 362    0x91a83991, 0x95a43195, 0xe437d3e4, 0x798bf279,
 363    0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d,
 364    0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9,
 365    0x6cb4d86c, 0x56faac56, 0xf407f3f4, 0xea25cfea,
 366    0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x08181008,
 367    0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e,
 368    0x1c24381c, 0xa6f157a6, 0xb4c773b4, 0xc65197c6,
 369    0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f,
 370    0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a,
 371    0x7090e070, 0x3e427c3e, 0xb5c471b5, 0x66aacc66,
 372    0x48d89048, 0x03050603, 0xf601f7f6, 0x0e121c0e,
 373    0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9,
 374    0x86911786, 0xc15899c1, 0x1d273a1d, 0x9eb9279e,
 375    0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211,
 376    0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394,
 377    0x9bb62d9b, 0x1e223c1e, 0x87921587, 0xe920c9e9,
 378    0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df,
 379    0x8c8f038c, 0xa1f859a1, 0x89800989, 0x0d171a0d,
 380    0xbfda65bf, 0xe631d7e6, 0x42c68442, 0x68b8d068,
 381    0x41c38241, 0x99b02999, 0x2d775a2d, 0x0f111e0f,
 382    0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16
 383 };
 384
 385
 386 const ULONG te3[] =
 387 {
 388    0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6,
 389    0xf2f20dff, 0x6b6bbdd6, 0x6f6fb1de, 0xc5c55491,
 390    0x30305060, 0x01010302, 0x6767a9ce, 0x2b2b7d56,
 391    0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec,
 392    0xcaca458f, 0x82829d1f, 0xc9c94089, 0x7d7d87fa,
 393    0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb,
 394    0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45,
 395    0x9c9cbf23, 0xa4a4f753, 0x727296e4, 0xc0c05b9b,
 396    0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c,
 397    0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83,
 398    0x34345c68, 0xa5a5f451, 0xe5e534d1, 0xf1f108f9,
 399    0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a,
 400    0x04040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d,
 401    0x18182830, 0x9696a137, 0x05050f0a, 0x9a9ab52f,
 402    0x0707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf,
 403    0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea,
 404    0x09091b12, 0x83839e1d, 0x2c2c7458, 0x1a1a2e34,
 405    0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b,
 406    0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d,
 407    0x29297b52, 0xe3e33edd, 0x2f2f715e, 0x84849713,
 408    0x5353f5a6, 0xd1d168b9, 0x00000000, 0xeded2cc1,
 409    0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6,
 410    0x6a6abed4, 0xcbcb468d, 0xbebed967, 0x39394b72,
 411    0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85,
 412    0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed,
 413    0x4343c586, 0x4d4dd79a, 0x33335566, 0x85859411,
 414    0x4545cf8a, 0xf9f910e9, 0x02020604, 0x7f7f81fe,
 415    0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b,
 416    0x5151f3a2, 0xa3a3fe5d, 0x4040c080, 0x8f8f8a05,
 417    0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1,
 418    0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342,
 419    0x10103020, 0xffff1ae5, 0xf3f30efd, 0xd2d26dbf,
 420    0xcdcd4c81, 0x0c0c1418, 0x13133526, 0xecec2fc3,
 421    0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e,
 422    0xc4c45793, 0xa7a7f255, 0x7e7e82fc, 0x3d3d477a,
 423    0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6,
 424    0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3,
 425    0x22226644, 0x2a2a7e54, 0x9090ab3b, 0x8888830b,
 426    0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28,
 427    0xdede79a7, 0x5e5ee2bc, 0x0b0b1d16, 0xdbdb76ad,
 428    0xe0e03bdb, 0x32325664, 0x3a3a4e74, 0x0a0a1e14,
 429    0x4949db92, 0x06060a0c, 0x24246c48, 0x5c5ce4b8,
 430    0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4,
 431    0x9191a839, 0x9595a431, 0xe4e437d3, 0x79798bf2,
 432    0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da,
 433    0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049,
 434    0x6c6cb4d8, 0x5656faac, 0xf4f407f3, 0xeaea25cf,
 435    0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x08081810,
 436    0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c,
 437    0x1c1c2438, 0xa6a6f157, 0xb4b4c773, 0xc6c65197,
 438    0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e,
 439    0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f,
 440    0x707090e0, 0x3e3e427c, 0xb5b5c471, 0x6666aacc,
 441    0x4848d890, 0x03030506, 0xf6f601f7, 0x0e0e121c,
 442    0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069,
 443    0x86869117, 0xc1c15899, 0x1d1d273a, 0x9e9eb927,
 444    0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322,
 445    0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733,
 446    0x9b9bb62d, 0x1e1e223c, 0x87879215, 0xe9e920c9,
 447    0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5,
 448    0x8c8c8f03, 0xa1a1f859, 0x89898009, 0x0d0d171a,
 449    0xbfbfda65, 0xe6e631d7, 0x4242c684, 0x6868b8d0,
 450    0x4141c382, 0x9999b029, 0x2d2d775a, 0x0f0f111e,
 451    0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c
 452 };
 453
 454
 455 const ULONG te4[] =
 456 {
 457    0x63636363, 0x7c7c7c7c, 0x77777777, 0x7b7b7b7b,
 458    0xf2f2f2f2, 0x6b6b6b6b, 0x6f6f6f6f, 0xc5c5c5c5,
 459    0x30303030, 0x01010101, 0x67676767, 0x2b2b2b2b,
 460    0xfefefefe, 0xd7d7d7d7, 0xabababab, 0x76767676,
 461    0xcacacaca, 0x82828282, 0xc9c9c9c9, 0x7d7d7d7d,
 462    0xfafafafa, 0x59595959, 0x47474747, 0xf0f0f0f0,
 463    0xadadadad, 0xd4d4d4d4, 0xa2a2a2a2, 0xafafafaf,
 464    0x9c9c9c9c, 0xa4a4a4a4, 0x72727272, 0xc0c0c0c0,
 465    0xb7b7b7b7, 0xfdfdfdfd, 0x93939393, 0x26262626,
 466    0x36363636, 0x3f3f3f3f, 0xf7f7f7f7, 0xcccccccc,
 467    0x34343434, 0xa5a5a5a5, 0xe5e5e5e5, 0xf1f1f1f1,
 468    0x71717171, 0xd8d8d8d8, 0x31313131, 0x15151515,
 469    0x04040404, 0xc7c7c7c7, 0x23232323, 0xc3c3c3c3,
 470    0x18181818, 0x96969696, 0x05050505, 0x9a9a9a9a,
 471    0x07070707, 0x12121212, 0x80808080, 0xe2e2e2e2,
 472    0xebebebeb, 0x27272727, 0xb2b2b2b2, 0x75757575,
 473    0x09090909, 0x83838383, 0x2c2c2c2c, 0x1a1a1a1a,
 474    0x1b1b1b1b, 0x6e6e6e6e, 0x5a5a5a5a, 0xa0a0a0a0,
 475    0x52525252, 0x3b3b3b3b, 0xd6d6d6d6, 0xb3b3b3b3,
 476    0x29292929, 0xe3e3e3e3, 0x2f2f2f2f, 0x84848484,
 477    0x53535353, 0xd1d1d1d1, 0x00000000, 0xedededed,
 478    0x20202020, 0xfcfcfcfc, 0xb1b1b1b1, 0x5b5b5b5b,
 479    0x6a6a6a6a, 0xcbcbcbcb, 0xbebebebe, 0x39393939,
 480    0x4a4a4a4a, 0x4c4c4c4c, 0x58585858, 0xcfcfcfcf,
 481    0xd0d0d0d0, 0xefefefef, 0xaaaaaaaa, 0xfbfbfbfb,
 482    0x43434343, 0x4d4d4d4d, 0x33333333, 0x85858585,
 483    0x45454545, 0xf9f9f9f9, 0x02020202, 0x7f7f7f7f,
 484    0x50505050, 0x3c3c3c3c, 0x9f9f9f9f, 0xa8a8a8a8,
 485    0x51515151, 0xa3a3a3a3, 0x40404040, 0x8f8f8f8f,
 486    0x92929292, 0x9d9d9d9d, 0x38383838, 0xf5f5f5f5,
 487    0xbcbcbcbc, 0xb6b6b6b6, 0xdadadada, 0x21212121,
 488    0x10101010, 0xffffffff, 0xf3f3f3f3, 0xd2d2d2d2,
 489    0xcdcdcdcd, 0x0c0c0c0c, 0x13131313, 0xecececec,
 490    0x5f5f5f5f, 0x97979797, 0x44444444, 0x17171717,
 491    0xc4c4c4c4, 0xa7a7a7a7, 0x7e7e7e7e, 0x3d3d3d3d,
 492    0x64646464, 0x5d5d5d5d, 0x19191919, 0x73737373,
 493    0x60606060, 0x81818181, 0x4f4f4f4f, 0xdcdcdcdc,
 494    0x22222222, 0x2a2a2a2a, 0x90909090, 0x88888888,
 495    0x46464646, 0xeeeeeeee, 0xb8b8b8b8, 0x14141414,
 496    0xdededede, 0x5e5e5e5e, 0x0b0b0b0b, 0xdbdbdbdb,
 497    0xe0e0e0e0, 0x32323232, 0x3a3a3a3a, 0x0a0a0a0a,
 498    0x49494949, 0x06060606, 0x24242424, 0x5c5c5c5c,
 499    0xc2c2c2c2, 0xd3d3d3d3, 0xacacacac, 0x62626262,
 500    0x91919191, 0x95959595, 0xe4e4e4e4, 0x79797979,
 501    0xe7e7e7e7, 0xc8c8c8c8, 0x37373737, 0x6d6d6d6d,
 502    0x8d8d8d8d, 0xd5d5d5d5, 0x4e4e4e4e, 0xa9a9a9a9,
 503    0x6c6c6c6c, 0x56565656, 0xf4f4f4f4, 0xeaeaeaea,
 504    0x65656565, 0x7a7a7a7a, 0xaeaeaeae, 0x08080808,
 505    0xbabababa, 0x78787878, 0x25252525, 0x2e2e2e2e,
 506    0x1c1c1c1c, 0xa6a6a6a6, 0xb4b4b4b4, 0xc6c6c6c6,
 507    0xe8e8e8e8, 0xdddddddd, 0x74747474, 0x1f1f1f1f,
 508    0x4b4b4b4b, 0xbdbdbdbd, 0x8b8b8b8b, 0x8a8a8a8a,
 509    0x70707070, 0x3e3e3e3e, 0xb5b5b5b5, 0x66666666,
 510    0x48484848, 0x03030303, 0xf6f6f6f6, 0x0e0e0e0e,
 511    0x61616161, 0x35353535, 0x57575757, 0xb9b9b9b9,
 512    0x86868686, 0xc1c1c1c1, 0x1d1d1d1d, 0x9e9e9e9e,
 513    0xe1e1e1e1, 0xf8f8f8f8, 0x98989898, 0x11111111,
 514    0x69696969, 0xd9d9d9d9, 0x8e8e8e8e, 0x94949494,
 515    0x9b9b9b9b, 0x1e1e1e1e, 0x87878787, 0xe9e9e9e9,
 516    0xcececece, 0x55555555, 0x28282828, 0xdfdfdfdf,
 517    0x8c8c8c8c, 0xa1a1a1a1, 0x89898989, 0x0d0d0d0d,
 518    0xbfbfbfbf, 0xe6e6e6e6, 0x42424242, 0x68686868,
 519    0x41414141, 0x99999999, 0x2d2d2d2d, 0x0f0f0f0f,
 520    0xb0b0b0b0, 0x54545454, 0xbbbbbbbb, 0x16161616
 521 };
 522
 523
 524 static const ULONG rcon[] =
 525 {
 526    0x01000000, 0x02000000, 0x04000000, 0x08000000,
 527    0x10000000, 0x20000000, 0x40000000, 0x80000000,
 528    0x1B000000, 0x36000000
 529 };
 530
 531
 532
 533 /****i* prism2.device/WriteClearFragment ***********************************
 534 *
 535 *   NAME
 536 *       WriteClearFragment -- Install unencrypted fragment data.
 537 *
 538 *   SYNOPSIS
 539 *       WriteClearFragment(unit, header, data, size,
 540 *           buffer)
 541 *
 542 *       VOID WriteClearFragment(struct DevUnit *, UBYTE *, UBYTE *, UWORD *,
 543 *           UBYTE *);
 544 *
 545 *   NOTES
 546 *       The input data address may be equal to the output buffer address,
 547 *       but they may not overlap in any other way.
 548 *
 549 ****************************************************************************
 550 *
 551 */
 552
 553 VOID WriteClearFragment(struct DevUnit *unit, UBYTE *header, UBYTE *data,
 554    UWORD *size, UBYTE *buffer, struct DevBase *base)
 555 {
 556    if(buffer != data)
 557       CopyMem(data, buffer, *size);
 558
 559    return;
 560 }
 561
 562
 563
 564 /****i* prism2.device/EncryptWEPFragment ***********************************
 565 *
 566 *   NAME
 567 *       EncryptWEPFragment -- Encrypt a fragment using the WEP cipher.
 568 *
 569 *   SYNOPSIS
 570 *       EncryptWEPFragment(unit, header, data, size,
 571 *           buffer)
 572 *
 573 *       VOID EncryptWEPFragment(struct DevUnit *, UBYTE *, UBYTE *, UWORD *,
 574 *           UBYTE *);
 575 *
 576 *   NOTES
 577 *       The input data may overlap the output buffer as long as the output
 578 *       address is not higher than the input address.
 579 *
 580 *       The output buffer must be at least 8 bytes bigger than the input
 581 *       data, so that the IV and ICV can be added.
 582 *
 583 ****************************************************************************
 584 *
 585 */
 586
 587 VOID EncryptWEPFragment(struct DevUnit *unit, UBYTE *header, UBYTE *data,
 588    UWORD *size, UBYTE *buffer, struct DevBase *base)
 589 {
 590    WEPEncrypt(unit, data, *size, buffer, FALSE, base);
 591    *size += IV_SIZE + ICV_SIZE;
 592
 593    return;
 594 }
 595
 596
 597
 598 /****i* prism2.device/WriteWEPFragment *************************************
 599 *
 600 *   NAME
 601 *       WriteWEPFragment -- Prepare a fragment to use the WEP cipher.
 602 *
 603 *   SYNOPSIS
 604 *       WriteWEPFragment(unit, header, data, size,
 605 *           buffer)
 606 *
 607 *       VOID WriteWEPFragment(struct DevUnit *, UBYTE *, UBYTE *, UWORD *,
 608 *           UBYTE *);
 609 *
 610 *   NOTES
 611 *       The input data address may be four bytes greater than the output
 612 *       buffer address, but they may not overlap in any other way.
 613 *
 614 ****************************************************************************
 615 *
 616 */
 617
 618 VOID WriteWEPFragment(struct DevUnit *unit, UBYTE *header, UBYTE *data,
 619    UWORD *size, UBYTE *buffer, struct DevBase *base)
 620 {
 621    WEPEncrypt(unit, data, *size, buffer, TRUE, base);
 622    if(buffer + IV_SIZE != data)
 623       CopyMem(data, buffer + IV_SIZE, *size);
 624    *size += IV_SIZE + ICV_SIZE;
 625
 626    return;
 627 }
 628
 629
 630
 631 /****i* prism2.device/EncryptTKIPFragment **********************************
 632 *
 633 *   NAME
 634 *       EncryptTKIPFragment -- Encrypt a fragment using the TKIP cipher.
 635 *
 636 *   SYNOPSIS
 637 *       EncryptTKIPFragment(unit, header, data,
 638 *           size, buffer)
 639 *
 640 *       VOID EncryptTKIPFragment(struct DevUnit *, UBYTE *, UBYTE *,
 641 *           UWORD *, UBYTE *);
 642 *
 643 *   NOTES
 644 *       The input data may overlap the output buffer as long as the output
 645 *       address is not higher than the input address.
 646 *
 647 *       The output buffer must be at least 12 bytes bigger than the input
 648 *       data, so that the Extended IV and the ICV can be added.
 649 *
 650 ****************************************************************************
 651 *
 652 */
 653
 654 VOID EncryptTKIPFragment(struct DevUnit *unit, UBYTE *header, UBYTE *data,
 655    UWORD *size, UBYTE *buffer, struct DevBase *base)
 656 {
 657    TKIPEncrypt(unit, data, *size, buffer, FALSE, base);
 658    *size += EIV_SIZE + ICV_SIZE;
 659
 660    return;
 661 }
 662
 663
 664
 665 /****i* prism2.device/WriteTKIPFragment ************************************
 666 *
 667 *   NAME
 668 *       WriteTKIPFragment -- Prepare a fragment to use the TKIP cipher.
 669 *
 670 *   SYNOPSIS
 671 *       WriteTKIPFragment(unit, header, data, size,
 672 *           buffer)
 673 *
 674 *       VOID WriteTKIPFragment(struct DevUnit *, UBYTE *, UBYTE *, UWORD *,
 675 *           UBYTE *);
 676 *
 677 *   NOTES
 678 *       The input data address may be eight bytes greater than the output
 679 *       buffer address, but they may not overlap in any other way.
 680 *
 681 ****************************************************************************
 682 *
 683 */
 684
 685 VOID WriteTKIPFragment(struct DevUnit *unit, UBYTE *header, UBYTE *data,
 686    UWORD *size, UBYTE *buffer, struct DevBase *base)
 687 {
 688    TKIPEncrypt(unit, data, *size, buffer, TRUE, base);
 689    if(buffer + EIV_SIZE != data)
 690       CopyMem(data, buffer + EIV_SIZE, *size);
 691    *size += EIV_SIZE + ICV_SIZE;
 692
 693    return;
 694 }
 695
 696
 697
 698 /****i* prism2.device/EncryptCCMPFragment **********************************
 699 *
 700 *   NAME
 701 *       EncryptCCMPFragment -- Encrypt a fragment using the CCMP cipher.
 702 *
 703 *   SYNOPSIS
 704 *       EncryptCCMPFragment(unit, header, data,
 705 *           size, buffer)
 706 *
 707 *       VOID EncryptCCMPFragment(struct DevUnit *, UBYTE *, UBYTE *,
 708 *           UWORD *, UBYTE *);
 709 *
 710 *   NOTES
 711 *       The input data may overlap the output buffer as long as the output
 712 *       address is not higher than the input address.
 713 *
 714 *       The output buffer must be at least 16 bytes bigger than the input
 715 *       data, so that the Extended IV and the MIC can be added.
 716 *
 717 ****************************************************************************
 718 *
 719 */
 720
 721 VOID EncryptCCMPFragment(struct DevUnit *unit, UBYTE *header, UBYTE *data,
 722    UWORD *size, UBYTE *buffer, struct DevBase *base)
 723 {
 724    CCMPSetIV(unit, data, buffer, base);
 725    CCMPEncrypt(unit, header, data, *size, buffer + EIV_SIZE, base);
 726    *size += EIV_SIZE + MIC_SIZE;
 727
 728    return;
 729 }
 730
 731
 732
 733 /****i* prism2.device/WriteCCMPFragment ************************************
 734 *
 735 *   NAME
 736 *       WriteCCMPFragment -- Prepare a fragment to use the CCMP cipher.
 737 *
 738 *   SYNOPSIS
 739 *       WriteCCMPFragment(unit, header, data, size,
 740 *           buffer)
 741 *
 742 *       VOID WriteCCMPFragment(struct DevUnit *, UBYTE *, UBYTE *, UWORD *,
 743 *           UBYTE *);
 744 *
 745 *   NOTES
 746 *       The input data address may be eight bytes greater than the output
 747 *       buffer address, but they may not overlap in any other way.
 748 *
 749 ****************************************************************************
 750 *
 751 */
 752
 753 VOID WriteCCMPFragment(struct DevUnit *unit, UBYTE *header, UBYTE *data,
 754    UWORD *size, UBYTE *buffer, struct DevBase *base)
 755 {
 756    CCMPSetIV(unit, data, buffer, base);
 757    if(buffer + EIV_SIZE != data)
 758       CopyMem(data, buffer + EIV_SIZE, *size);
 759    *size += EIV_SIZE + MIC_SIZE;
 760
 761    return;
 762 }
 763
 764
 765
 766 /****i* prism2.device/ReadClearFragment *************************************
 767 *
 768 *   NAME
 769 *       ReadClearFragment -- Extract data from an unencrypted fragment.
 770 *
 771 *   SYNOPSIS
 772 *       success = ReadClearFragment(unit, header, data, size,
 773 *           buffer)
 774 *
 775 *       BOOL ReadClearFragment(struct DevUnit *, UBYTE *, UBYTE *, UWORD *,
 776 *           UBYTE *);
 777 *
 778 ****************************************************************************
 779 *
 780 */
 781
 782 BOOL ReadClearFragment(struct DevUnit *unit, UBYTE *header, UBYTE *data,
 783    UWORD *size, UBYTE *buffer, struct DevBase *base)
 784 {
 785    CopyMem(data, buffer, *size);
 786
 787    return TRUE;
 788 }
 789
 790
 791
 792 /****i* prism2.device/DecryptWEPFragment ***********************************
 793 *
 794 *   NAME
 795 *       DecryptWEPFragment -- Decrypt a fragment using the WEP cipher.
 796 *
 797 *   SYNOPSIS
 798 *       success = DecryptWEPFragment(unit, header, data, size,
 799 *           buffer)
 800 *
 801 *       BOOL DecryptWEPFragment(struct DevUnit *, UBYTE *, UBYTE *, UWORD *,
 802 *           UBYTE *);
 803 *
 804 *   NOTES
 805 *       The input data may overlap the output buffer as long as the output
 806 *       address is not higher than the input address.
 807 *
 808 ****************************************************************************
 809 *
 810 */
 811
 812 BOOL DecryptWEPFragment(struct DevUnit *unit, UBYTE *header, UBYTE *data,
 813    UWORD *size, UBYTE *buffer, struct DevBase *base)
 814 {
 815    BOOL success;
 816
 817    success = WEPDecrypt(unit, data, *size, buffer, base);
 818    *size -= IV_SIZE + ICV_SIZE;
 819
 820    return success;
 821 }
 822
 823
 824
 825 /****i* prism2.device/ReadWEPFragment **************************************
 826 *
 827 *   NAME
 828 *       ReadWEPFragment -- Extract data from a WEP fragment.
 829 *
 830 *   SYNOPSIS
 831 *       success = ReadWEPFragment(unit, header, data, size,
 832 *           buffer)
 833 *
 834 *       BOOL ReadWEPFragment(struct DevUnit *, UBYTE *, UBYTE *, UWORD *,
 835 *           UBYTE *);
 836 *
 837 ****************************************************************************
 838 *
 839 */
 840
 841 BOOL ReadWEPFragment(struct DevUnit *unit, UBYTE *header, UBYTE *data,
 842    UWORD *size, UBYTE *buffer, struct DevBase *base)
 843 {
 844    *size -= IV_SIZE + ICV_SIZE;
 845    CopyMem(data + IV_SIZE, buffer, *size);
 846
 847    return TRUE;
 848 }
 849
 850
 851
 852 /****i* prism2.device/DecryptTKIPFragment **********************************
 853 *
 854 *   NAME
 855 *       DecryptTKIPFragment -- Decrypt a fragment using the TKIP cipher.
 856 *
 857 *   SYNOPSIS
 858 *       success = DecryptTKIPFragment(unit, header, data,
 859 *           size, buffer)
 860 *
 861 *       BOOL DecryptTKIPFragment(struct DevUnit *, UBYTE *, UBYTE *,
 862 *           UWORD *, UBYTE *);
 863 *
 864 *   NOTES
 865 *       The input data may overlap the output buffer as long as the output
 866 *       address is not higher than the input address.
 867 *
 868 ****************************************************************************
 869 *
 870 */
 871
 872 BOOL DecryptTKIPFragment(struct DevUnit *unit, UBYTE *header, UBYTE *data,
 873    UWORD *size, UBYTE *buffer, struct DevBase *base)
 874 {
 875    BOOL success;
 876
 877    success = TKIPDecrypt(unit, data, *size, buffer, FALSE,
 878       base);
 879    *size -= EIV_SIZE + ICV_SIZE;
 880
 881    return success;
 882 }
 883
 884
 885
 886 /****i* prism2.device/ReadTKIPFragment *************************************
 887 *
 888 *   NAME
 889 *       ReadTKIPFragment -- Extract data from a TKIP fragment.
 890 *
 891 *   SYNOPSIS
 892 *       success = ReadTKIPFragment(unit, header, data, size,
 893 *           buffer)
 894 *
 895 *       BOOL ReadTKIPFragment(struct DevUnit *, UBYTE *, UBYTE *, UWORD *,
 896 *           UBYTE *);
 897 *
 898 ****************************************************************************
 899 *
 900 */
 901
 902 BOOL ReadTKIPFragment(struct DevUnit *unit, UBYTE *header, UBYTE *data,
 903    UWORD *size, UBYTE *buffer, struct DevBase *base)
 904 {
 905    BOOL success;
 906
 907    success = TKIPDecrypt(unit, data, *size, buffer, TRUE,
 908       base);
 909    *size -= EIV_SIZE + ICV_SIZE;
 910    if(success)
 911       CopyMem(data + EIV_SIZE, buffer, *size);
 912
 913    return success;
 914 }
 915
 916
 917
 918 /****i* prism2.device/DecryptCCMPFragment **********************************
 919 *
 920 *   NAME
 921 *       DecryptCCMPFragment -- Decrypt a fragment using the CCMP cipher.
 922 *
 923 *   SYNOPSIS
 924 *       success = DecryptCCMPFragment(unit, header, data,
 925 *           size, buffer)
 926 *
 927 *       BOOL DecryptCCMPFragment(struct DevUnit *, UBYTE *, UBYTE *,
 928 *           UWORD *, UBYTE *);
 929 *
 930 *   NOTES
 931 *       The input data may overlap the output buffer as long as the output
 932 *       address is not higher than the input address.
 933 *
 934 ****************************************************************************
 935 *
 936 */
 937
 938 BOOL DecryptCCMPFragment(struct DevUnit *unit, UBYTE *header, UBYTE *data,
 939    UWORD *size, UBYTE *buffer, struct DevBase *base)
 940 {
 941    BOOL success = FALSE;
 942    UWORD key_no;
 943    struct CCMPKey *key;
 944
 945    if(CCMPCheckIV(unit, data, &key_no, base))
 946    {
 947       *size -= EIV_SIZE;
 948       success = CCMPDecrypt(unit, header, data + EIV_SIZE, *size, buffer,
 949          key_no, base);
 950       *size -= MIC_SIZE;
 951    }
 952
 953    /* Increment sequence counter */
 954
 955    if(success)
 956    {
 957       key = &unit->keys[key_no].u.ccmp;
 958       if(++key->rx_iv_low == 0)
 959          key->rx_iv_high++;
 960    }
 961
 962    return success;
 963 }
 964
 965
 966
 967 /****i* prism2.device/ReadCCMPFragment *************************************
 968 *
 969 *   NAME
 970 *       ReadCCMPFragment -- Extract data from a CCMP fragment.
 971 *
 972 *   SYNOPSIS
 973 *       success = ReadCCMPFragment(unit, header, data, size,
 974 *           buffer)
 975 *
 976 *       BOOL ReadCCMPFragment(struct DevUnit *, UBYTE *, UBYTE *, UWORD *,
 977 *           UBYTE *);
 978 *
 979 ****************************************************************************
 980 *
 981 */
 982
 983 BOOL ReadCCMPFragment(struct DevUnit *unit, UBYTE *header, UBYTE *data,
 984    UWORD *size, UBYTE *buffer, struct DevBase *base)
 985 {
 986    BOOL success;
 987    UWORD key_no;
 988    struct CCMPKey *key;
 989
 990    success = CCMPCheckIV(unit, data, &key_no, base);
 991    *size -= EIV_SIZE + MIC_SIZE;
 992    if(success)
 993       CopyMem(data + EIV_SIZE, buffer, *size);
 994
 995    /* Increment sequence counter */
 996
 997    if(success)
 998    {
 999       key = &unit->keys[key_no].u.ccmp;
1000       if(++key->rx_iv_low == 0)
1001          key->rx_iv_high++;
1002    }
1003
1004    return success;
1005 }
1006
1007
1008
1009 /****i* prism2.device/TKIPEncryptFrame *************************************
1010 *
1011 *   NAME
1012 *       TKIPEncryptFrame -- Append the Michael MIC to a frame.
1013 *
1014 *   SYNOPSIS
1015 *       TKIPEncryptFrame(unit, header, data, size,
1016 *           buffer)
1017 *
1018 *       VOID TKIPEncryptFrame(struct DevUnit *, UBYTE *, UBYTE *, UWORD,
1019 *           UBYTE *);
1020 *
1021 *   NOTES
1022 *       The input data address may be equal to the output buffer address,
1023 *       but they may not overlap in any other way.
1024 *
1025 *       The output buffer must be at least 8 bytes bigger than the input
1026 *       data, so that the MIC can be added.
1027 *
1028 ****************************************************************************
1029 *
1030 */
1031
1032 VOID TKIPEncryptFrame(struct DevUnit *unit, const UBYTE *header,
1033    UBYTE *data, UWORD size, UBYTE *buffer, struct DevBase *base)
1034 {
1035    ULONG *mic_key, mic[2];
1036    ULONG mic_l, mic_r, zero = 0;
1037    struct TKIPKey *key = &unit->keys[unit->tx_key_no].u.tkip;
1038
1039    /* Calculate MIC and append to packet data */
1040
1041    if(data != buffer)
1042       CopyMem(data, buffer, size);
1043
1044    mic_key = key->tx_mic_key;
1045    mic_l = LELong(mic_key[0]);
1046    mic_r = LELong(mic_key[1]);
1047    UpdateMIC(&mic_l, &mic_r, (ULONG *)header, 3);
1048    UpdateMIC(&mic_l, &mic_r, &zero, 1);
1049    CopyMem(mic_padding, buffer + size, sizeof(mic_padding));
1050    UpdateMIC(&mic_l, &mic_r, (ULONG *)buffer, size / 4 + 2);
1051    mic[0] = MakeLELong(mic_l);
1052    mic[1] = MakeLELong(mic_r);
1053    CopyMem(mic, buffer + size, sizeof(mic));
1054
1055    return;
1056 }
1057
1058
1059
1060 /****i* prism2.device/TKIPDecryptFrame *************************************
1061 *
1062 *   NAME
1063 *       TKIPDecryptFrame -- Check that a frame's MIC is correct.
1064 *
1065 *   SYNOPSIS
1066 *       success = TKIPDecryptFrame(unit, header, data, size,
1067 *           buffer, key_no)
1068 *
1069 *       BOOL TKIPDecryptFrame(struct DevUnit *, UBYTE *, UBYTE *, UWORD,
1070 *           UBYTE *, UWORD);
1071 *
1072 *   NOTES
1073 *       The input data address may be equal to the output buffer address,
1074 *       but they may not overlap in any other way.
1075 *
1076 ****************************************************************************
1077 *
1078 */
1079
1080 BOOL TKIPDecryptFrame(struct DevUnit *unit, const UBYTE *header,
1081    UBYTE *data, UWORD size, UBYTE *buffer, UWORD key_no,
1082    struct DevBase *base)
1083 {
1084    ULONG *mic_key, mic[2];
1085    ULONG mic_l, mic_r, zero = 0;
1086
1087    /* Calculate MIC and compare it with MIC received */
1088
1089    size -= sizeof(mic);
1090    CopyMem(buffer + size, mic, sizeof(mic));
1091    CopyMem(mic_padding, buffer + size, sizeof(mic_padding));
1092
1093    mic_key = unit->keys[key_no].u.tkip.rx_mic_key;
1094    mic_l = LELong(mic_key[0]);
1095    mic_r = LELong(mic_key[1]);
1096    UpdateMIC(&mic_l, &mic_r, (ULONG *)header, 3);
1097    UpdateMIC(&mic_l, &mic_r, &zero, 1);
1098    UpdateMIC(&mic_l, &mic_r, (ULONG *)buffer, size / sizeof(ULONG) + 2);
1099
1100    if(data != buffer)
1101       CopyMem(data, buffer, size);
1102
1103    return LELong(mic[0]) == mic_l && LELong(mic[1]) == mic_r;
1104 }
1105
1106
1107
1108 /****i* prism2.device/WEPEncrypt *******************************************
1109 *
1110 *   NAME
1111 *       WEPEncrypt -- Encrypt a fragment using the WEP cipher.
1112 *
1113 *   SYNOPSIS
1114 *       WEPEncrypt(unit, data, size, buffer, seed,
1115 *           iv_only)
1116 *
1117 *       VOID WEPEncrypt(struct DevUnit *, UBYTE *, UWORD, UBYTE *, UBYTE *,
1118 *           BOOL);
1119 *
1120 *   NOTES
1121 *       The input data may overlap the output buffer as long as the output
1122 *       address is at least 4 bytes lower than the input address.
1123 *
1124 ****************************************************************************
1125 *
1126 */
1127
1128 static VOID WEPEncrypt(struct DevUnit *unit, const UBYTE *data, UWORD size,
1129    UBYTE *buffer, BOOL iv_only, struct DevBase *base)
1130 {
1131    UWORD i;
1132    ULONG iv;
1133    const UBYTE *p;
1134    UBYTE seed[16], *q;
1135    struct WEPKey *key = &unit->keys[unit->tx_key_no].u.wep;
1136
1137    /* Create RC4 seed from IV and WEP key */
1138
1139    iv = MakeBELong(++key->tx_iv);
1140    for(i = 0, p = (UBYTE *)&iv + 1, q = seed; i < 3; i++)
1141       *q++ = *p++;
1142    if(!iv_only)
1143       for(i = 0, p = key->key; i < key->length; i++)
1144          *q++ = *p++;
1145
1146    /* Preface encrypted data with the IV and key ID */
1147
1148    for(i = 0; i < 3; i++)
1149       buffer[i] = seed[i];
1150    buffer[3] = unit->tx_key_no << 6;
1151
1152    /* Encrypt data and CRC */
1153
1154    if(!iv_only)
1155       RC4Encrypt(unit, data, size, buffer + 4, seed, base);
1156
1157    return;
1158 }
1159
1160
1161
1162 /****i* prism2.device/WEPDecrypt *******************************************
1163 *
1164 *   NAME
1165 *       WEPDecrypt -- Decrypt a fragment using the WEP cipher.
1166 *
1167 *   SYNOPSIS
1168 *       WEPDecrypt(unit, data, size, buffer)
1169 *
1170 *       VOID WEPDecrypt(struct DevUnit *, UBYTE *, UWORD, UBYTE *);
1171 *
1172 *   NOTES
1173 *       The input data may overlap the output buffer as long as the output
1174 *       address is not higher than the input address.
1175 *
1176 ****************************************************************************
1177 *
1178 */
1179
1180 static BOOL WEPDecrypt(struct DevUnit *unit, const UBYTE *data, UWORD size,
1181    UBYTE *buffer, struct DevBase *base)
1182 {
1183    UWORD i;
1184    const UBYTE *p;
1185    UBYTE seed[16], *q;
1186    const struct WEPKey *key = &unit->keys[data[3] >> 6].u.wep;
1187
1188    /* Create RC4 seed from IV and WEP key */
1189
1190    for(i = 0, p = data, q = seed; i < 3; i++)
1191       *q++ = *p++;
1192    for(i = 0, p = key->key; i < key->length; i++)
1193       *q++ = *p++;
1194
1195    /* Decrypt data */
1196
1197    return RC4Decrypt(unit, data + 4, size - 4, buffer, seed, base);
1198 }
1199
1200
1201
1202 /****i* prism2.device/TKIPEncrypt ******************************************
1203 *
1204 *   NAME
1205 *       TKIPEncrypt -- Encrypt a fragment using the TKIP cipher.
1206 *
1207 *   SYNOPSIS
1208 *       TKIPEncrypt(unit, data, size, buffer, iv_only)
1209 *
1210 *       VOID TKIPEncrypt(struct DevUnit *, UBYTE *, UWORD, UBYTE *, BOOL);
1211 *
1212 *   NOTES
1213 *       The input data may overlap the output buffer as long as the output
1214 *       address is not higher than the input address.
1215 *
1216 *       The output buffer must be at least 12 bytes bigger than the input
1217 *       data, so that the Extended IV and the ICV can be added.
1218 *
1219 ****************************************************************************
1220 *
1221 */
1222
1223 static VOID TKIPEncrypt(struct DevUnit *unit, UBYTE *data, UWORD size,
1224    UBYTE *buffer, BOOL iv_only, struct DevBase *base)
1225 {
1226    UBYTE seed[16];
1227    struct TKIPKey *key = &unit->keys[unit->tx_key_no].u.tkip;
1228
1229    /* Create RC4 seed from IV, TA and temporal key */
1230
1231    if(!iv_only)
1232    {
1233       if(!key->tx_ttak_set)
1234       {
1235          TKIPKeyMix1(key->tx_ttak, (UWORD *)key->key,
1236             (UWORD *)unit->address, key->tx_iv_high, base);
1237          key->tx_ttak_set = TRUE;
1238       }
1239       TKIPKeyMix2(seed, key->tx_ttak, (UWORD *)key->key, key->tx_iv_low,
1240          base);
1241    }
1242
1243    /* Preface encrypted data with IV, key ID, TKIP flag and extended IV */
1244
1245    buffer[0] = key->tx_iv_low >> 8;
1246    buffer[1] = (key->tx_iv_low >> 8 | 0x20) & 0x7f;
1247    buffer[2] = key->tx_iv_low;
1248    buffer[3] = unit->tx_key_no << 6 | 0x20;
1249    buffer += 4;
1250    *(ULONG *)buffer =
1251       MakeLELong(key->tx_iv_high);
1252    buffer += 4;
1253
1254    /* Encrypt data and CRC */
1255
1256    if(!iv_only)
1257       RC4Encrypt(unit, data, size, buffer, seed, base);
1258
1259    /* Increment 48-bit sequence counter */
1260
1261    if((++key->tx_iv_low) == 0)
1262    {
1263       key->tx_iv_high++;
1264       key->tx_ttak_set = FALSE;
1265    }
1266
1267    return;
1268 }
1269
1270
1271
1272 /****i* prism2.device/TKIPDecrypt ******************************************
1273 *
1274 *   NAME
1275 *       TKIPDecrypt -- Decrypt a fragment using the TKIP cipher.
1276 *
1277 *   SYNOPSIS
1278 *       success = TKIPDecrypt(unit, data, size, buffer, iv_only)
1279 *
1280 *       BOOL TKIPDecrypt(struct DevUnit *, UBYTE *, UWORD, UBYTE *, BOOL);
1281 *
1282 *   NOTES
1283 *       The input data may overlap the output buffer as long as the output
1284 *       address is not higher than the input address.
1285 *
1286 ****************************************************************************
1287 *
1288 */
1289
1290 static BOOL TKIPDecrypt(struct DevUnit *unit, UBYTE *data, UWORD size,
1291    UBYTE *buffer, BOOL iv_only, struct DevBase *base)
1292 {
1293    UBYTE seed[16];
1294    ULONG iv_low, iv_high;
1295    BOOL success = TRUE;
1296    UWORD key_no;
1297    struct TKIPKey *key;
1298
1299    /* Extract IV, key ID, TKIP flag and extended IV */
1300
1301    iv_low = data[0] << 8 | data[2];
1302    key_no = data[3] >> 6;
1303    data += 4;
1304    iv_high = LELong(*(ULONG *)data);
1305    data += 4;
1306
1307    /* Check for replay attack */
1308
1309    key = &unit->keys[key_no].u.tkip;
1310    if(iv_high < key->rx_iv_high
1311       || iv_high == key->rx_iv_high && iv_low < key->rx_iv_low)
1312       success = FALSE;
1313
1314    /* TO DO: replay timeout */
1315
1316    if(success && !iv_only)
1317    {
1318       /* Create RC4 seed from IV, TA and temporal key */
1319
1320       if(iv_high > key->rx_iv_high)
1321          key->rx_ttak_set = FALSE;
1322       if(!key->rx_ttak_set)
1323       {
1324          TKIPKeyMix1(key->rx_ttak,
1325             (UWORD *)unit->keys[key_no].u.tkip.key,
1326             (UWORD *)unit->bssid, iv_high, base);
1327          key->rx_ttak_set = TRUE;
1328       }
1329       TKIPKeyMix2(seed, key->rx_ttak,
1330          (UWORD *)unit->keys[key_no].u.tkip.key, iv_low, base);
1331
1332       /* Decrypt data and check ICV/CRC */
1333
1334       size -= EIV_SIZE;
1335       success = RC4Decrypt(unit, data, size, buffer, seed, base);
1336    }
1337
1338    /* Increment 48-bit sequence counter */
1339
1340    if(success)
1341    {
1342       key->rx_iv_high = iv_high;
1343       key->rx_iv_low = iv_low;
1344       if(++key->rx_iv_low == 0)
1345       {
1346          key->rx_iv_high++;
1347          key->rx_ttak_set = FALSE;
1348       }
1349    }
1350
1351    return success;
1352 }
1353
1354
1355
1356 /****i* prism2.device/CCMPSetIV ********************************************
1357 *
1358 *   NAME
1359 *       CCMPSetIV -- Add CCMP IV to a fragment.
1360 *
1361 *   SYNOPSIS
1362 *       CCMPSetIV(unit, data, buffer)
1363 *
1364 *       VOID CCMPSetIV(struct DevUnit *, UBYTE *, UBYTE *);
1365 *
1366 ****************************************************************************
1367 *
1368 */
1369
1370 static VOID CCMPSetIV(struct DevUnit *unit, UBYTE *data, UBYTE *buffer,
1371    struct DevBase *base)
1372 {
1373    struct CCMPKey *key = &unit->keys[unit->tx_key_no].u.ccmp;
1374
1375    /* Increment 48-bit sequence counter */
1376
1377    if((++key->tx_iv_low) == 0)
1378    {
1379       key->tx_iv_high++;
1380    }
1381
1382    /* Preface encrypted data with IV, key ID, CCMP flag and extended IV */
1383
1384    buffer[0] = key->tx_iv_low;
1385    buffer[1] = key->tx_iv_low >> 8;
1386    buffer[2] = 0;
1387    buffer[3] = unit->tx_key_no << 6 | 0x20;
1388    *(ULONG *)(buffer + 4) = MakeLELong(key->tx_iv_high);
1389
1390    return;
1391 }
1392
1393
1394
1395 /****i* prism2.device/CCMPEncrypt ******************************************
1396 *
1397 *   NAME
1398 *       CCMPEncrypt -- Encrypt a fragment using the CCMP cipher.
1399 *
1400 *   SYNOPSIS
1401 *       CCMPEncrypt(unit, header, data, size, buffer,
1402 *           iv_only)
1403 *
1404 *       VOID CCMPEncrypt(struct DevUnit *, UBYTE *, UBYTE *, UWORD, UBYTE *,
1405 *           BOOL);
1406 *
1407 *   NOTES
1408 *       The input data may overlap the output buffer as long as the output
1409 *       address is not higher than the input address.
1410 *
1411 *       The output buffer must be at least 16 bytes bigger than the input
1412 *       data, so that the MIC can be added.
1413 *
1414 *   INTERNALS
1415 *       For efficiency, the nonce and AAD are not constructed as separate
1416 *       entities, but immediately integrated into their corresponding CBC
1417 *       blocks.
1418 *
1419 ****************************************************************************
1420 *
1421 */
1422
1423 static VOID CCMPEncrypt(struct DevUnit *unit, const UBYTE *header,
1424    const UBYTE *data, UWORD size, UBYTE *buffer, struct DevBase *base)
1425 {
1426    struct CCMPKey *key = &unit->keys[unit->tx_key_no].u.ccmp;
1427    UBYTE aad_blocks[16 * 2], nonce_block[16],
1428       *q;
1429    const UBYTE *p;
1430    UWORD i, j, block_count;
1431    ULONG n, data_block[4], mic_block[4], key_block[4];
1432
1433    if(!key->stream_set)
1434    {
1435       AESKeyMix(key->stream, (ULONG *)key->key, base);
1436       key->stream_set = TRUE;
1437    }
1438
1439    /* Construct AAD blocks */
1440
1441    aad_blocks[0] = 0;
1442    aad_blocks[1] = 22;
1443
1444    *(UWORD *)(aad_blocks + 2) = *(UWORD *)(header + WIFI_FRM_CONTROL)
1445       & MakeLEWord(WIFI_FRM_CONTROLF_VERSION | WIFI_FRM_CONTROLF_TYPE
1446       | (1 << 7) | WIFI_FRM_CONTROLF_TODS | WIFI_FRM_CONTROLF_FROMDS
1447       | WIFI_FRM_CONTROLF_MOREFRAGS | WIFI_FRM_CONTROLF_ORDER)
1448       | MakeLEWord(WIFI_FRM_CONTROLF_WEP);
1449    CopyMem(header + WIFI_FRM_ADDRESS1, aad_blocks + 4, ETH_ADDRESSSIZE * 3);
1450    *(UWORD *)(aad_blocks + 22) =
1451       *(UWORD *)(header + WIFI_FRM_SEQCONTROL) & MakeLEWord(0xf);
1452
1453    *(ULONG *)(aad_blocks + 24) = 0;
1454    *(ULONG *)(aad_blocks + 28) = 0;
1455
1456    /* Construct nonce block */
1457
1458    nonce_block[0] = 0x59;
1459
1460    nonce_block[1] = 0;
1461    CopyMem(header + WIFI_FRM_ADDRESS2, nonce_block + 2, ETH_ADDRESSSIZE);
1462
1463    n = MakeBELong(key->tx_iv_high);
1464    for(i = 0, p = (UBYTE *)&n; i < 4; i++)
1465       nonce_block[8 + i] = p[i];
1466    n = MakeBELong(key->tx_iv_low);
1467    for(i = 0, p = (UBYTE *)&n + 2; i < 2; i++)
1468       nonce_block[12 + i] = p[i];
1469
1470    *(UWORD *)(nonce_block + 14) = MakeBEWord(size);
1471
1472    /* Initialise MIC block from nonce block */
1473
1474    AESEncrypt((ULONG *)nonce_block, mic_block, key->stream, base);
1475
1476    /* Integrate AAD into MIC */
1477
1478    for(i = 0, p = aad_blocks; i < 2; i++, p += 16)
1479    {
1480       EOREncrypt((ULONG *)p, mic_block, mic_block, base);
1481       AESEncrypt(mic_block, mic_block, key->stream,
1482          base);
1483    }
1484
1485    /* Encrypt data and calculate MIC */
1486
1487    nonce_block[0] = 0x01;
1488    block_count = (size - 1) / 16 + 1;
1489
1490    for(i = 1, j = size, p = data, q = buffer; i <= block_count; i++,
1491       p += 16, q += 16, j -= 16)
1492    {
1493       /* Update MIC */
1494
1495       if(j < 16)
1496       {
1497          data_block[0] = 0;
1498          data_block[1] = 0;
1499          data_block[2] = 0;
1500          data_block[3] = 0;
1501          CopyMem(p, data_block, j);
1502       }
1503       else
1504          CopyMem(p, data_block, 16);
1505       EOREncrypt(data_block, mic_block, mic_block, base);
1506       AESEncrypt(mic_block, mic_block, key->stream, base);
1507
1508       /* Encrypt next block */
1509
1510       *(UWORD *)(nonce_block + 14) = MakeBEWord(i);
1511       AESEncrypt((ULONG *)nonce_block, key_block, key->stream, base);
1512       EOREncrypt((ULONG *)p, (ULONG *)q, key_block, base);
1513    }
1514
1515    /* Append MIC */
1516
1517    *(UWORD *)(nonce_block + 14) = 0;
1518    AESEncrypt((ULONG *)nonce_block, key_block, key->stream, base);
1519    EOREncrypt(mic_block, mic_block, key_block, base);
1520    CopyMem(mic_block, buffer + size, MIC_SIZE);
1521
1522    return;
1523 }
1524
1525
1526
1527 /****i* prism2.device/CCMPCheckIV ******************************************
1528 *
1529 *   NAME
1530 *       CCMPCheckIV -- Process a CCMP fragment's IV.
1531 *
1532 *   SYNOPSIS
1533 *       success = CCMPCheckIV(unit, data, key_no)
1534 *
1535 *       BOOL CCMPCheckIV(struct DevUnit *, UBYTE *, UWORD);
1536 *
1537 ****************************************************************************
1538 *
1539 */
1540
1541 static BOOL CCMPCheckIV(struct DevUnit *unit, UBYTE *data, UWORD *key_no,
1542    struct DevBase *base)
1543 {
1544    BOOL success = TRUE;
1545    ULONG iv_low, iv_high;
1546    struct CCMPKey *key;
1547
1548    /* Extract sequence counter and key ID */
1549
1550    iv_low = data[1] << 8 | data[0];
1551    *key_no = data[3] >> 6;
1552    data += 4;
1553    iv_high = LELong(*(ULONG *)data);
1554
1555    /* Check for replay attack */
1556
1557    key = &unit->keys[*key_no].u.ccmp;
1558    if(iv_high < key->rx_iv_high
1559       || iv_high == key->rx_iv_high && iv_low < key->rx_iv_low)
1560       success = FALSE;
1561
1562    /* TO DO: replay timeout */
1563
1564    /* Store new sequence counter */
1565
1566    if(success)
1567    {
1568       key->rx_iv_high = iv_high;
1569       key->rx_iv_low = iv_low;
1570    }
1571
1572    return success;
1573 }
1574
1575
1576
1577 /****i* prism2.device/CCMPDecrypt ******************************************
1578 *
1579 *   NAME
1580 *       CCMPDecrypt -- Decrypt a fragment using the CCMP cipher.
1581 *
1582 *   SYNOPSIS
1583 *       success = CCMPDecrypt(unit, header, data, size, buffer,
1584 *           iv_only)
1585 *
1586 *       BOOL CCMPDecrypt(struct DevUnit *, UBYTE *, UBYTE *, UWORD, UBYTE *,
1587 *           BOOL);
1588 *
1589 *   NOTES
1590 *       The input data may overlap the output buffer as long as the output
1591 *       address is not higher than the input address.
1592 *
1593 ****************************************************************************
1594 *
1595 */
1596
1597 static BOOL CCMPDecrypt(struct DevUnit *unit, const UBYTE *header,
1598    const UBYTE *data, UWORD size, UBYTE *buffer, UWORD key_no,
1599    struct DevBase *base)
1600 {
1601    struct CCMPKey *key;
1602    UBYTE aad_blocks[16 * 2], nonce_block[16], *q;
1603    const UBYTE *p;
1604    UWORD i, j, block_count;
1605    ULONG n, mic_block[4], key_block[4];
1606    BOOL success = TRUE;
1607    ULONG data_block[4];
1608
1609    /* Get key */
1610
1611    size -= MIC_SIZE;
1612    key = &unit->keys[key_no].u.ccmp;
1613    if(!key->stream_set)
1614    {
1615       AESKeyMix(key->stream, (ULONG *)key->key, base);
1616       key->stream_set = TRUE;
1617    }
1618
1619    /* Construct AAD blocks */
1620
1621    aad_blocks[0] = 0;
1622    aad_blocks[1] = 22;
1623
1624    *(UWORD *)(aad_blocks + 2) = *(UWORD *)(header + WIFI_FRM_CONTROL)
1625       & MakeLEWord(WIFI_FRM_CONTROLF_VERSION | WIFI_FRM_CONTROLF_TYPE
1626       | (1 << 7) | WIFI_FRM_CONTROLF_TODS | WIFI_FRM_CONTROLF_FROMDS
1627       | WIFI_FRM_CONTROLF_MOREFRAGS | WIFI_FRM_CONTROLF_ORDER)
1628       | MakeLEWord(WIFI_FRM_CONTROLF_WEP);
1629    CopyMem(header + WIFI_FRM_ADDRESS1, aad_blocks + 4, ETH_ADDRESSSIZE * 3);
1630    *(UWORD *)(aad_blocks + 22) =
1631       *(UWORD *)(header + WIFI_FRM_SEQCONTROL) & MakeLEWord(0xf);
1632
1633    *(ULONG *)(aad_blocks + 24) = 0;
1634    *(ULONG *)(aad_blocks + 28) = 0;
1635
1636    /* Construct nonce block */
1637
1638    nonce_block[0] = 0x59;
1639
1640    nonce_block[1] = 0;
1641    CopyMem(header + WIFI_FRM_ADDRESS2, nonce_block + 2, ETH_ADDRESSSIZE);
1642
1643    n = MakeBELong(key->rx_iv_high);
1644    for(i = 0, p = (UBYTE *)&n; i < 4; i++)
1645       nonce_block[8 + i] = p[i];
1646    n = MakeBELong(key->rx_iv_low);
1647    for(i = 0, p = (UBYTE *)&n + 2; i < 2; i++)
1648       nonce_block[12 + i] = p[i];
1649
1650    *(UWORD *)(nonce_block + 14) = MakeBEWord(size);
1651
1652    /* Initialise MIC block from nonce block */
1653
1654    AESEncrypt((ULONG *)nonce_block, mic_block, key->stream, base);
1655
1656    /* Integrate AAD into MIC */
1657
1658    for(i = 0, p = aad_blocks; i < 2; i++, p += 16)
1659    {
1660       EOREncrypt((ULONG *)p, mic_block, mic_block, base);
1661       AESEncrypt(mic_block, mic_block, key->stream, base);
1662    }
1663
1664    /* Decrypt data and calculate MIC */
1665
1666    nonce_block[0] = 0x01;
1667    block_count = (size - 1) / 16 + 1;
1668
1669    for(i = 1, j = size, p = data, q = buffer; i <= block_count; i++,
1670       p += 16, q += 16, j -= 16)
1671    {
1672       /* Decrypt next block */
1673
1674       *(UWORD *)(nonce_block + 14) = MakeBEWord(i);
1675       AESEncrypt((ULONG *)nonce_block, key_block, key->stream, base);
1676       EOREncrypt((ULONG *)p, (ULONG *)q, key_block, base);
1677
1678       /* Update MIC */
1679
1680       if(j < 16)
1681       {
1682          data_block[0] = 0;
1683          data_block[1] = 0;
1684          data_block[2] = 0;
1685          data_block[3] = 0;
1686          CopyMem(q, data_block, j);
1687       }
1688       else
1689       {
1690          CopyMem(q, data_block, 16);
1691       }
1692       EOREncrypt(data_block, mic_block, mic_block, base);
1693       AESEncrypt(mic_block, mic_block, key->stream, base);
1694    }
1695
1696    /* Extract and check MIC */
1697
1698    *(UWORD *)(nonce_block + 14) = 0;
1699    AESEncrypt((ULONG *)nonce_block, key_block, key->stream, base);
1700    EOREncrypt(mic_block, mic_block, key_block, base);
1701    CopyMem(data + size, mic_block + MIC_SIZE / sizeof(ULONG), MIC_SIZE);
1702    if(mic_block[0] != mic_block[2] || mic_block[1] != mic_block[3])
1703       success = FALSE;
1704
1705    return success;
1706 }
1707
1708
1709
1710 /****i* prism2.device/UpdateMIC ********************************************
1711 *
1712 *   NAME
1713 *       UpdateMIC -- Include new data into a Michael MIC value.
1714 *
1715 *   SYNOPSIS
1716 *       UpdateMIC(left, right, data, count)
1717 *
1718 *       VOID UpdateMIC(ULONG *, ULONG *, ULONG *, ULONG);
1719 *
1720 ****************************************************************************
1721 *
1722 */
1723
1724 VOID UpdateMIC(ULONG *left, ULONG *right, const ULONG *data,
1725    ULONG count)
1726 {
1727    ULONG l = *left, r = *right, i;
1728
1729    for(i = 0; i < count; i++)
1730    {
1731       l ^= LELong(*data++);
1732       r ^= l << 17 | l >> (32 - 17);
1733       l += r;
1734       r ^= ((l & 0x00ff00ff) << 8) | ((l & 0xff00ff00) >> 8);
1735       l += r;
1736       r ^= l << 3 | l >> (32 - 3);
1737       l += r;
1738       r ^= l >> 2 | l << (32 - 2);
1739       l += r;
1740    }
1741
1742    *left = l;
1743    *right = r;
1744
1745    return;
1746 }
1747
1748
1749
1750 /****i* prism2.device/TKIPKeyMix1 ******************************************
1751 *
1752 *   NAME
1753 *       TKIPKeyMix1 -- Apply phase 1 of the TKIP key-mixing function.
1754 *
1755 *   SYNOPSIS
1756 *       TKIPKeyMix1(ttak, tk, ta, iv_high)
1757 *
1758 *       VOID TKIPKeyMix1(UWORD *, UWORD *, UWORD *, ULONG);
1759 *
1760 ****************************************************************************
1761 *
1762 */
1763
1764 static VOID TKIPKeyMix1(UWORD *ttak, const UWORD *tk, const UWORD *ta,
1765    ULONG iv_high, struct DevBase *base)
1766 {
1767    const UWORD *p;
1768    UWORD i, *q, *r, a;
1769
1770    ttak[0] = iv_high;
1771    ttak[1] = iv_high >> 16;
1772    ttak[2] = LEWord(ta[0]);
1773    ttak[3] = LEWord(ta[1]);
1774    ttak[4] = LEWord(ta[2]);
1775
1776    for(i = 0; i < 8; i++)
1777    {
1778       p = tk + (i & 1);
1779       q = ttak;
1780       r = ttak + 4;
1781       a = *p++;
1782       *q++ += SBox(*r ^ a);
1783       r = ttak;
1784       *q++ += SBox(*r++ ^ *++p);
1785       p += 2;
1786       *q++ += SBox(*r++ ^ *p++);
1787       *q++ += SBox(*r++ ^ *++p);
1788       *q += SBox(*r++ ^ a) + i;
1789    }
1790
1791    return;
1792 }
1793
1794
1795
1796 /****i* prism2.device/TKIPKeyMix2 ******************************************
1797 *
1798 *   NAME
1799 *       TKIPKeyMix2 -- Apply phase 2 of the TKIP key-mixing function.
1800 *
1801 *   SYNOPSIS
1802 *       TKIPKeyMix2(rc4_seed, ttak, tk, iv16)
1803 *
1804 *       VOID TKIPKeyMix2(UBYTE *, UWORD *, UWORD *, UWORD);
1805 *
1806 ****************************************************************************
1807 *
1808 */
1809
1810 VOID TKIPKeyMix2(UBYTE *rc4_seed, const UWORD *ttak, const UWORD *tk,
1811    UWORD iv16, struct DevBase *base)
1812 {
1813    const UWORD *p = ttak;
1814    UWORD i, temp_key[6], *q = temp_key, *r, a;
1815
1816    for(i = 0; i < 5; i++)
1817       *q++ = *p++;
1818    a = *q++ = ttak[4] + iv16;
1819
1820    p = tk;
1821    r = q = temp_key;
1822    *q++ += SBox(a ^ *p++);
1823    *q++ += SBox(*r++ ^ *p++);
1824    *q++ += SBox(*r++ ^ *p++);
1825    *q++ += SBox(*r++ ^ *p++);
1826    *q++ += SBox(*r++ ^ *p++);
1827    *q++ += SBox(*r++ ^ *p++);
1828
1829    q = temp_key;
1830    a = *r++ ^ *p++;
1831    *q++ += a << 15 | a >> 1;
1832    r = temp_key;
1833    a = *r++ ^ *p++;
1834    *q++ += a << 15 | a >> 1;
1835    a = *r++;
1836    *q++ += a << 15 | a >> 1;
1837    a = *r++;
1838    *q++ += a << 15 | a >> 1;
1839    a = *r++;
1840    *q++ += a << 15 | a >> 1;
1841    a = *r;
1842    *q += a << 15 | a >> 1;
1843
1844    *rc4_seed++ = iv16 >> 8;
1845    *rc4_seed++ = (iv16 >> 8 | 0x20) & 0x7f;
1846    *rc4_seed++ = iv16;
1847    *rc4_seed++ = (*q ^ tk[0]) >> 1;
1848    q = temp_key;
1849    for(i = 0; i < 6; i++)
1850    {
1851       a = *q++;
1852       *rc4_seed++ = a;
1853       *rc4_seed++ = a >> 8;
1854    }
1855
1856    return;
1857 }
1858
1859
1860
1861 /****i* prism2.device/RC4Encrypt *******************************************
1862 *
1863 *   NAME
1864 *       RC4Encrypt -- Encrypt data using the RC4 cipher, and append CRC.
1865 *
1866 *   SYNOPSIS
1867 *       RC4Encrypt(unit, data, size, buffer, seed)
1868 *
1869 *       VOID RC4Encrypt(struct DevUnit *, UBYTE *, UWORD, UBYTE *, UBYTE *);
1870 *
1871 *   NOTES
1872 *       The input data may overlap the output buffer as long as the output
1873 *       address is not higher than the input address.
1874 *
1875 ****************************************************************************
1876 *
1877 */
1878
1879 VOID RC4Encrypt(struct DevUnit *unit, const UBYTE *data, UWORD size,
1880    UBYTE *buffer, UBYTE *seed, struct DevBase *base)
1881 {
1882    UWORD i, j, k;
1883    ULONG crc = ~0;
1884    const UBYTE *p;
1885    UBYTE s[256], *q, a, b, c;
1886
1887    /* Initialise RC4 state */
1888
1889    for(i = 0; i < 256; i++)
1890       s[i] = i;
1891    for(j = i = 0; i < 256; i++)
1892    {
1893       a = s[i];
1894       j = j + seed[i & 0xf] + a & 0xff;
1895       s[i] = s[j];
1896       s[j] = a;
1897    }
1898
1899    /* Encrypt data and CRC */
1900
1901    for(p = data, q = buffer, k = j = i = 0; k < size + 4; k++)
1902    {
1903       if(k == size)
1904       {
1905          *(ULONG *)q = MakeLELong(~crc);
1906          p = q;
1907       }
1908       i = i + 1 & 0xff;
1909       a = s[i];
1910       j = j + a & 0xff;
1911       s[i] = b = s[j];
1912       s[j] = a;
1913       c = *p++;
1914       *q++ = c ^ s[a + b & 0xff];
1915       crc = crc32[(crc ^ c) & 0xff] ^ crc >> 8;
1916    }
1917
1918    return;
1919 }
1920
1921
1922 /****i* prism2.device/RC4Decrypt *******************************************
1923 *
1924 *   NAME
1925 *       RC4Decrypt -- Decrypt data using the RC4 cipher, and check CRC.
1926 *
1927 *   SYNOPSIS
1928 *       success = RC4Encrypt(unit, data, size, buffer, seed)
1929 *
1930 *       BOOL RC4Decrypt(struct DevUnit *, UBYTE *, UWORD, UBYTE *, UBYTE *);
1931 *
1932 *   NOTES
1933 *       The input data may overlap the output buffer as long as the output
1934 *       address is not higher than the input address.
1935 *
1936 *       The output buffer must be at least as big as the input data.
1937 *
1938 ****************************************************************************
1939 *
1940 */
1941
1942 BOOL RC4Decrypt(struct DevUnit *unit, const UBYTE *data, UWORD size,
1943    UBYTE *buffer, UBYTE *seed, struct DevBase *base)
1944 {
1945    UWORD i, j, k;
1946    ULONG crc = ~0;
1947    const UBYTE *p;
1948    UBYTE s[256], *q, a, b, c;
1949
1950    /* Initialise RC4 state */
1951
1952    for(i = 0; i < 256; i++)
1953       s[i] = i;
1954    for(j = i = 0; i < 256; i++)
1955    {
1956       a = s[i];
1957       j = j + seed[i & 0xf] + s[i] & 0xff;
1958       s[i] = s[j];
1959       s[j] = a;
1960    }
1961
1962    /* Decrypt data and CRC */
1963
1964    for(p = data, q = buffer, k = j = i = 0; k < size; k++)
1965    {
1966       i = i + 1 & 0xff;
1967       a = s[i];
1968       j = j + a & 0xff;
1969       b = s[j];
1970       s[j] = a;
1971       s[i] = b;
1972       c = *p++ ^ s[a + b & 0xff];
1973       if(k < size - 4)
1974          crc = crc32[(crc ^ c) & 0xff] ^ crc >> 8;
1975       *q++ = c;
1976    }
1977
1978    /* Check CRC */
1979
1980    return ~crc == LELong(*(ULONG *)(q - 4));
1981 }
1982
1983
1984 /****i* prism2.device/EOREncrypt *******************************************
1985 *
1986 *   NAME
1987 *       EOREncrypt -- Apply exclusive-or to a block.
1988 *
1989 *   SYNOPSIS
1990 *       EOREncrypt(data, buffer, key)
1991 *
1992 *       VOID EOREncrypt(UBYTE *, UBYTE *, UBYTE *);
1993 *
1994 *   NOTES
1995 *#      The input data may overlap the output buffer as long as the output
1996 *#      address is not higher than the input address.
1997 *
1998 ****************************************************************************
1999 *
2000 */
2001
2002 VOID EOREncrypt(const ULONG *data, ULONG *buffer, ULONG *key,
2003    struct DevBase *base)
2004 {
2005     *buffer++ = *data++ ^ *key++;
2006     *buffer++ = *data++ ^ *key++;
2007     *buffer++ = *data++ ^ *key++;
2008     *buffer++ = *data++ ^ *key++;
2009 }
2010
2011
2012
2013 /****i* prism2.device/AESKeyMix ********************************************
2014 *
2015 *   NAME
2016 *       AESKeyMix -- Expand an AES key into a key stream.
2017 *
2018 *   SYNOPSIS
2019 *       AESKeyMix(stream, key)
2020 *
2021 *       VOID AESKeyMix(struct DevUnit *, UBYTE *);
2022 *
2023 ****************************************************************************
2024 *
2025 */
2026
2027 static VOID AESKeyMix(ULONG *stream, const ULONG *key, struct DevBase *base)
2028 {
2029    UWORD i;
2030    ULONG n;
2031
2032    stream[0] = BELong(key[0]);
2033    stream[1] = BELong(key[1]);
2034    stream[2] = BELong(key[2]);
2035    stream[3] = BELong(key[3]);
2036
2037    for(i = 0; i < 10; i++)
2038    {
2039       n = stream[3];
2040       stream[4] = stream[0] ^ (te4[(n >> 16) & 0xff] & 0xff000000)
2041          ^ (te4[(n >> 8) & 0xff] & 0x00ff0000)
2042          ^ (te4[n & 0xff] & 0x0000ff00)
2043          ^ (te4[n >> 24] & 0x000000ff) ^ rcon[i];
2044       stream[5] = stream[1] ^ stream[4];
2045       stream[6] = stream[2] ^ stream[5];
2046       stream[7] = stream[3] ^ stream[6];
2047       stream += 4;
2048    }
2049 }
2050
2051
2052
2053 /****i* prism2.device/AESEncrypt *******************************************
2054 *
2055 *   NAME
2056 *       AESEncrypt -- Encrypt a block using the AES cipher.
2057 *
2058 *   SYNOPSIS
2059 *       AESEncrypt(data, buffer, key)
2060 *
2061 *       VOID AESEncrypt(UBYTE *, UBYTE *, UBYTE *);
2062 *
2063 ****************************************************************************
2064 *
2065 */
2066
2067 VOID AESEncrypt(const ULONG *data, ULONG *buffer, ULONG *key,
2068    struct DevBase *base)
2069 {
2070    UWORD i = 5;
2071    ULONG s0, s1, s2, s3, t0, t1, t2, t3;
2072
2073
2074    s0 = BELong(data[0]) ^ key[0];
2075    s1 = BELong(data[1]) ^ key[1];
2076    s2 = BELong(data[2]) ^ key[2];
2077    s3 = BELong(data[3]) ^ key[3];
2078
2079    while(TRUE)
2080    {
2081       t0 = te0[s0 >> 24] ^ te1[(s1 >> 16) & 0xff] ^ te2[(s2 >> 8) & 0xff]
2082          ^ te3[s3 & 0xff] ^ key[4];
2083       t1 = te0[s1 >> 24] ^ te1[(s2 >> 16) & 0xff] ^ te2[(s3 >> 8) & 0xff]
2084          ^ te3[s0 & 0xff] ^ key[5];
2085       t2 = te0[s2 >> 24] ^ te1[(s3 >> 16) & 0xff] ^ te2[(s0 >> 8) & 0xff]
2086          ^ te3[s1 & 0xff] ^ key[6];
2087       t3 = te0[s3 >> 24] ^ te1[(s0 >> 16) & 0xff] ^ te2[(s1 >> 8) & 0xff]
2088          ^ te3[s2 & 0xff] ^ key[7];
2089
2090       key += 8;
2091       if(--i == 0)
2092          break;
2093
2094       s0 = te0[t0 >> 24] ^ te1[(t1 >> 16) & 0xff] ^ te2[(t2 >> 8) & 0xff]
2095          ^ te3[t3 & 0xff] ^ key[0];
2096       s1 = te0[t1 >> 24] ^ te1[(t2 >> 16) & 0xff] ^ te2[(t3 >> 8) & 0xff]
2097          ^ te3[t0 & 0xff] ^ key[1];
2098       s2 = te0[t2 >> 24] ^ te1[(t3 >> 16) & 0xff] ^ te2[(t0 >> 8) & 0xff]
2099          ^ te3[t1 & 0xff] ^ key[2];
2100       s3 = te0[t3 >> 24] ^ te1[(t0 >> 16) & 0xff] ^ te2[(t1 >> 8) & 0xff]
2101          ^ te3[t2 & 0xff] ^ key[3];
2102    }
2103
2104    s0 = (te4[t0 >> 24] & 0xff000000) ^ (te4[(t1 >> 16) & 0xff] & 0x00ff0000)
2105       ^ (te4[(t2 >> 8) & 0xff] & 0x0000ff00) ^ (te4[t3 & 0xff] & 0x000000ff)
2106       ^ key[0];
2107    buffer[0] = MakeBELong(s0);
2108    s1 = (te4[t1 >> 24] & 0xff000000) ^ (te4[(t2 >> 16) & 0xff] & 0x00ff0000)
2109       ^ (te4[(t3 >> 8) & 0xff] & 0x0000ff00) ^ (te4[t0 & 0xff] & 0x000000ff)
2110       ^ key[1];
2111    buffer[1] = MakeBELong(s1);
2112    s2 = (te4[t2 >> 24] & 0xff000000) ^ (te4[(t3 >> 16) & 0xff] & 0x00ff0000)
2113       ^ (te4[(t0 >> 8) & 0xff] & 0x0000ff00) ^ (te4[t1 & 0xff] & 0x000000ff)
2114       ^ key[2];
2115    buffer[2] = MakeBELong(s2);
2116    s3 = (te4[t3 >> 24] & 0xff000000) ^ (te4[(t0 >> 16) & 0xff] & 0x00ff0000)
2117       ^ (te4[(t1 >> 8) & 0xff] & 0x0000ff00) ^ (te4[t2 & 0xff] & 0x000000ff)
2118       ^ key[3];
2119    buffer[3] = MakeBELong(s3);
2120
2121    return;
2122 }
2123
2124
2125