1 /*
2 * AES (Rijndael) cipher
3 * Copyright (c) 2003-2012, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #ifndef AES_I_H
10 #define AES_I_H
11
12 #include "aes.h"
13
14 /* #define FULL_UNROLL */
15 #define AES_SMALL_TABLES
16
17 extern const u32 Te0[256];
18 extern const u32 Te1[256];
19 extern const u32 Te2[256];
20 extern const u32 Te3[256];
21 extern const u32 Te4[256];
22 extern const u32 Td0[256];
23 extern const u32 Td1[256];
24 extern const u32 Td2[256];
25 extern const u32 Td3[256];
26 extern const u32 Td4[256];
27 extern const u32 rcon[10];
28 extern const u8 Td4s[256];
29 extern const u8 rcons[10];
30
31 #ifndef AES_SMALL_TABLES
32
33 #define RCON(i) rcon[(i)]
34
35 #define TE0(i) Te0[((i) >> 24) & 0xff]
36 #define TE1(i) Te1[((i) >> 16) & 0xff]
37 #define TE2(i) Te2[((i) >> 8) & 0xff]
38 #define TE3(i) Te3[(i) & 0xff]
39 #define TE41(i) (Te4[((i) >> 24) & 0xff] & 0xff000000)
40 #define TE42(i) (Te4[((i) >> 16) & 0xff] & 0x00ff0000)
41 #define TE43(i) (Te4[((i) >> 8) & 0xff] & 0x0000ff00)
42 #define TE44(i) (Te4[(i) & 0xff] & 0x000000ff)
43 #define TE421(i) (Te4[((i) >> 16) & 0xff] & 0xff000000)
44 #define TE432(i) (Te4[((i) >> 8) & 0xff] & 0x00ff0000)
45 #define TE443(i) (Te4[(i) & 0xff] & 0x0000ff00)
46 #define TE414(i) (Te4[((i) >> 24) & 0xff] & 0x000000ff)
47 #define TE411(i) (Te4[((i) >> 24) & 0xff] & 0xff000000)
48 #define TE422(i) (Te4[((i) >> 16) & 0xff] & 0x00ff0000)
49 #define TE433(i) (Te4[((i) >> 8) & 0xff] & 0x0000ff00)
50 #define TE444(i) (Te4[(i) & 0xff] & 0x000000ff)
51 #define TE4(i) (Te4[(i)] & 0x000000ff)
52
53 #define TD0(i) Td0[((i) >> 24) & 0xff]
54 #define TD1(i) Td1[((i) >> 16) & 0xff]
55 #define TD2(i) Td2[((i) >> 8) & 0xff]
56 #define TD3(i) Td3[(i) & 0xff]
57 #define TD41(i) (Td4[((i) >> 24) & 0xff] & 0xff000000)
58 #define TD42(i) (Td4[((i) >> 16) & 0xff] & 0x00ff0000)
59 #define TD43(i) (Td4[((i) >> 8) & 0xff] & 0x0000ff00)
60 #define TD44(i) (Td4[(i) & 0xff] & 0x000000ff)
61 #define TD0_(i) Td0[(i) & 0xff]
62 #define TD1_(i) Td1[(i) & 0xff]
63 #define TD2_(i) Td2[(i) & 0xff]
64 #define TD3_(i) Td3[(i) & 0xff]
65
66 #else /* AES_SMALL_TABLES */
67
68 #define RCON(i) ((u32) rcons[(i)] << 24)
69
rotr(u32 val,int bits)70 static inline u32 rotr(u32 val, int bits)
71 {
72 return (val >> bits) | (val << (32 - bits));
73 }
74
75 #define TE0(i) Te0[((i) >> 24) & 0xff]
76 #define TE1(i) rotr(Te0[((i) >> 16) & 0xff], 8)
77 #define TE2(i) rotr(Te0[((i) >> 8) & 0xff], 16)
78 #define TE3(i) rotr(Te0[(i) & 0xff], 24)
79 #define TE41(i) ((Te0[((i) >> 24) & 0xff] << 8) & 0xff000000)
80 #define TE42(i) (Te0[((i) >> 16) & 0xff] & 0x00ff0000)
81 #define TE43(i) (Te0[((i) >> 8) & 0xff] & 0x0000ff00)
82 #define TE44(i) ((Te0[(i) & 0xff] >> 8) & 0x000000ff)
83 #define TE421(i) ((Te0[((i) >> 16) & 0xff] << 8) & 0xff000000)
84 #define TE432(i) (Te0[((i) >> 8) & 0xff] & 0x00ff0000)
85 #define TE443(i) (Te0[(i) & 0xff] & 0x0000ff00)
86 #define TE414(i) ((Te0[((i) >> 24) & 0xff] >> 8) & 0x000000ff)
87 #define TE411(i) ((Te0[((i) >> 24) & 0xff] << 8) & 0xff000000)
88 #define TE422(i) (Te0[((i) >> 16) & 0xff] & 0x00ff0000)
89 #define TE433(i) (Te0[((i) >> 8) & 0xff] & 0x0000ff00)
90 #define TE444(i) ((Te0[(i) & 0xff] >> 8) & 0x000000ff)
91 #define TE4(i) ((Te0[(i)] >> 8) & 0x000000ff)
92
93 #define TD0(i) Td0[((i) >> 24) & 0xff]
94 #define TD1(i) rotr(Td0[((i) >> 16) & 0xff], 8)
95 #define TD2(i) rotr(Td0[((i) >> 8) & 0xff], 16)
96 #define TD3(i) rotr(Td0[(i) & 0xff], 24)
97 #define TD41(i) ((u32) Td4s[((i) >> 24) & 0xff] << 24)
98 #define TD42(i) ((u32) Td4s[((i) >> 16) & 0xff] << 16)
99 #define TD43(i) ((u32) Td4s[((i) >> 8) & 0xff] << 8)
100 #define TD44(i) ((u32) Td4s[(i) & 0xff])
101 #define TD0_(i) Td0[(i) & 0xff]
102 #define TD1_(i) rotr(Td0[(i) & 0xff], 8)
103 #define TD2_(i) rotr(Td0[(i) & 0xff], 16)
104 #define TD3_(i) rotr(Td0[(i) & 0xff], 24)
105
106 #endif /* AES_SMALL_TABLES */
107
108 #ifdef _MSC_VER
109 #define SWAP(x) (_lrotl(x, 8) & 0x00ff00ff | _lrotr(x, 8) & 0xff00ff00)
110 #define GETU32(p) SWAP(*((u32 *)(p)))
111 #define PUTU32(ct, st) { *((u32 *)(ct)) = SWAP((st)); }
112 #else
113 #define GETU32(pt) (((u32)(pt)[0] << 24) ^ ((u32)(pt)[1] << 16) ^ \
114 ((u32)(pt)[2] << 8) ^ ((u32)(pt)[3]))
115 #define PUTU32(ct, st) { \
116 (ct)[0] = (u8)((st) >> 24); (ct)[1] = (u8)((st) >> 16); \
117 (ct)[2] = (u8)((st) >> 8); (ct)[3] = (u8)(st); }
118 #endif
119
120 #define AES_PRIV_SIZE (4 * 4 * 15 + 4)
121 #define AES_PRIV_NR_POS (4 * 15)
122
123 int rijndaelKeySetupEnc(u32 rk[], const u8 cipherKey[], int keyBits);
124
125 #endif /* AES_I_H */
126