src/crypto/aes_i.h

   1 /*
   2  * AES (Rijndael) cipher
   3  * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
   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 version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #ifndef AES_I_H
  16 #define AES_I_H
  17
  18 #include "aes.h"
  19
  20 /* #define FULL_UNROLL */
  21 #define AES_SMALL_TABLES
  22
  23 extern const u32 Te0[256];
  24 extern const u32 Te1[256];
  25 extern const u32 Te2[256];
  26 extern const u32 Te3[256];
  27 extern const u32 Te4[256];
  28 extern const u32 Td0[256];
  29 extern const u32 Td1[256];
  30 extern const u32 Td2[256];
  31 extern const u32 Td3[256];
  32 extern const u32 Td4[256];
  33 extern const u32 rcon[10];
  34 extern const u8 Td4s[256];
  35 extern const u8 rcons[10];
  36
  37 #ifndef AES_SMALL_TABLES
  38
  39 #define RCON(i) rcon[(i)]
  40
  41 #define TE0(i) Te0[((i) >> 24) & 0xff]
  42 #define TE1(i) Te1[((i) >> 16) & 0xff]
  43 #define TE2(i) Te2[((i) >> 8) & 0xff]
  44 #define TE3(i) Te3[(i) & 0xff]
  45 #define TE41(i) (Te4[((i) >> 24) & 0xff] & 0xff000000)
  46 #define TE42(i) (Te4[((i) >> 16) & 0xff] & 0x00ff0000)
  47 #define TE43(i) (Te4[((i) >> 8) & 0xff] & 0x0000ff00)
  48 #define TE44(i) (Te4[(i) & 0xff] & 0x000000ff)
  49 #define TE421(i) (Te4[((i) >> 16) & 0xff] & 0xff000000)
  50 #define TE432(i) (Te4[((i) >> 8) & 0xff] & 0x00ff0000)
  51 #define TE443(i) (Te4[(i) & 0xff] & 0x0000ff00)
  52 #define TE414(i) (Te4[((i) >> 24) & 0xff] & 0x000000ff)
  53 #define TE4(i) (Te4[(i)] & 0x000000ff)
  54
  55 #define TD0(i) Td0[((i) >> 24) & 0xff]
  56 #define TD1(i) Td1[((i) >> 16) & 0xff]
  57 #define TD2(i) Td2[((i) >> 8) & 0xff]
  58 #define TD3(i) Td3[(i) & 0xff]
  59 #define TD41(i) (Td4[((i) >> 24) & 0xff] & 0xff000000)
  60 #define TD42(i) (Td4[((i) >> 16) & 0xff] & 0x00ff0000)
  61 #define TD43(i) (Td4[((i) >> 8) & 0xff] & 0x0000ff00)
  62 #define TD44(i) (Td4[(i) & 0xff] & 0x000000ff)
  63 #define TD0_(i) Td0[(i) & 0xff]
  64 #define TD1_(i) Td1[(i) & 0xff]
  65 #define TD2_(i) Td2[(i) & 0xff]
  66 #define TD3_(i) Td3[(i) & 0xff]
  67
  68 #else /* AES_SMALL_TABLES */
  69
  70 #define RCON(i) (rcons[(i)] << 24)
  71
  72 static inline u32 rotr(u32 val, int bits)
  73 {
  74         return (val >> bits) | (val << (32 - bits));
  75 }
  76
  77 #define TE0(i) Te0[((i) >> 24) & 0xff]
  78 #define TE1(i) rotr(Te0[((i) >> 16) & 0xff], 8)
  79 #define TE2(i) rotr(Te0[((i) >> 8) & 0xff], 16)
  80 #define TE3(i) rotr(Te0[(i) & 0xff], 24)
  81 #define TE41(i) ((Te0[((i) >> 24) & 0xff] << 8) & 0xff000000)
  82 #define TE42(i) (Te0[((i) >> 16) & 0xff] & 0x00ff0000)
  83 #define TE43(i) (Te0[((i) >> 8) & 0xff] & 0x0000ff00)
  84 #define TE44(i) ((Te0[(i) & 0xff] >> 8) & 0x000000ff)
  85 #define TE421(i) ((Te0[((i) >> 16) & 0xff] << 8) & 0xff000000)
  86 #define TE432(i) (Te0[((i) >> 8) & 0xff] & 0x00ff0000)
  87 #define TE443(i) (Te0[(i) & 0xff] & 0x0000ff00)
  88 #define TE414(i) ((Te0[((i) >> 24) & 0xff] >> 8) & 0x000000ff)
  89 #define TE4(i) ((Te0[(i)] >> 8) & 0x000000ff)
  90
  91 #define TD0(i) Td0[((i) >> 24) & 0xff]
  92 #define TD1(i) rotr(Td0[((i) >> 16) & 0xff], 8)
  93 #define TD2(i) rotr(Td0[((i) >> 8) & 0xff], 16)
  94 #define TD3(i) rotr(Td0[(i) & 0xff], 24)
  95 #define TD41(i) (Td4s[((i) >> 24) & 0xff] << 24)
  96 #define TD42(i) (Td4s[((i) >> 16) & 0xff] << 16)
  97 #define TD43(i) (Td4s[((i) >> 8) & 0xff] << 8)
  98 #define TD44(i) (Td4s[(i) & 0xff])
  99 #define TD0_(i) Td0[(i) & 0xff]
 100 #define TD1_(i) rotr(Td0[(i) & 0xff], 8)
 101 #define TD2_(i) rotr(Td0[(i) & 0xff], 16)
 102 #define TD3_(i) rotr(Td0[(i) & 0xff], 24)
 103
 104 #endif /* AES_SMALL_TABLES */
 105
 106 #ifdef _MSC_VER
 107 #define SWAP(x) (_lrotl(x, 8) & 0x00ff00ff | _lrotr(x, 8) & 0xff00ff00)
 108 #define GETU32(p) SWAP(*((u32 *)(p)))
 109 #define PUTU32(ct, st) { *((u32 *)(ct)) = SWAP((st)); }
 110 #else
 111 #define GETU32(pt) (((u32)(pt)[0] << 24) ^ ((u32)(pt)[1] << 16) ^ \
 112 ((u32)(pt)[2] <<  8) ^ ((u32)(pt)[3]))
 113 #define PUTU32(ct, st) { \
 114 (ct)[0] = (u8)((st) >> 24); (ct)[1] = (u8)((st) >> 16); \
 115 (ct)[2] = (u8)((st) >>  8); (ct)[3] = (u8)(st); }
 116 #endif
 117
 118 #define AES_PRIV_SIZE (4 * 44)
 119
 120 void rijndaelKeySetupEnc(u32 rk[/*44*/], const u8 cipherKey[]);
 121
 122 #endif /* AES_I_H */