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
23extern const u32 Te0[256];
24extern const u32 Te1[256];
25extern const u32 Te2[256];
26extern const u32 Te3[256];
27extern const u32 Te4[256];
28extern const u32 Td0[256];
29extern const u32 Td1[256];
30extern const u32 Td2[256];
31extern const u32 Td3[256];
32extern const u32 Td4[256];
33extern const u32 rcon[10];
34extern const u8 Td4s[256];
35extern 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
72static 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
120void rijndaelKeySetupEnc(u32 rk[/*44*/], const u8 cipherKey[]);
121
122#endif /* AES_I_H */
123