Akshay Mishra
to be used with the DSPLoRa module (minor changes wrt transmit power)
Fork of
LoRaWAN-lib
by 
S P
crypto/aes.cpp@0:91d1a7783bb9, 2015-10-20 (annotated)
- Committer:
- mluis
- Date:
- Tue Oct 20 13:21:26 2015 +0000
- Revision:
- 0:91d1a7783bb9
Library creation synchronized with GitHub LoRaMac-node v3.4 (https://github.com/Lora-net/LoRaMac-node)
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| mluis | 0:91d1a7783bb9 | 1 | /* |
| mluis | 0:91d1a7783bb9 | 2 | --------------------------------------------------------------------------- |
| mluis | 0:91d1a7783bb9 | 3 | Copyright (c) 1998-2008, Brian Gladman, Worcester, UK. All rights reserved. |
| mluis | 0:91d1a7783bb9 | 4 | |
| mluis | 0:91d1a7783bb9 | 5 | LICENSE TERMS |
| mluis | 0:91d1a7783bb9 | 6 | |
| mluis | 0:91d1a7783bb9 | 7 | The redistribution and use of this software (with or without changes) |
| mluis | 0:91d1a7783bb9 | 8 | is allowed without the payment of fees or royalties provided that: |
| mluis | 0:91d1a7783bb9 | 9 | |
| mluis | 0:91d1a7783bb9 | 10 | 1. source code distributions include the above copyright notice, this |
| mluis | 0:91d1a7783bb9 | 11 | list of conditions and the following disclaimer; |
| mluis | 0:91d1a7783bb9 | 12 | |
| mluis | 0:91d1a7783bb9 | 13 | 2. binary distributions include the above copyright notice, this list |
| mluis | 0:91d1a7783bb9 | 14 | of conditions and the following disclaimer in their documentation; |
| mluis | 0:91d1a7783bb9 | 15 | |
| mluis | 0:91d1a7783bb9 | 16 | 3. the name of the copyright holder is not used to endorse products |
| mluis | 0:91d1a7783bb9 | 17 | built using this software without specific written permission. |
| mluis | 0:91d1a7783bb9 | 18 | |
| mluis | 0:91d1a7783bb9 | 19 | DISCLAIMER |
| mluis | 0:91d1a7783bb9 | 20 | |
| mluis | 0:91d1a7783bb9 | 21 | This software is provided 'as is' with no explicit or implied warranties |
| mluis | 0:91d1a7783bb9 | 22 | in respect of its properties, including, but not limited to, correctness |
| mluis | 0:91d1a7783bb9 | 23 | and/or fitness for purpose. |
| mluis | 0:91d1a7783bb9 | 24 | --------------------------------------------------------------------------- |
| mluis | 0:91d1a7783bb9 | 25 | Issue 09/09/2006 |
| mluis | 0:91d1a7783bb9 | 26 | |
| mluis | 0:91d1a7783bb9 | 27 | This is an AES implementation that uses only 8-bit byte operations on the |
| mluis | 0:91d1a7783bb9 | 28 | cipher state (there are options to use 32-bit types if available). |
| mluis | 0:91d1a7783bb9 | 29 | |
| mluis | 0:91d1a7783bb9 | 30 | The combination of mix columns and byte substitution used here is based on |
| mluis | 0:91d1a7783bb9 | 31 | that developed by Karl Malbrain. His contribution is acknowledged. |
| mluis | 0:91d1a7783bb9 | 32 | */ |
| mluis | 0:91d1a7783bb9 | 33 | |
| mluis | 0:91d1a7783bb9 | 34 | /* define if you have a fast memcpy function on your system */ |
| mluis | 0:91d1a7783bb9 | 35 | #if 0 |
| mluis | 0:91d1a7783bb9 | 36 | # define HAVE_MEMCPY |
| mluis | 0:91d1a7783bb9 | 37 | # include <string.h> |
| mluis | 0:91d1a7783bb9 | 38 | # if defined( _MSC_VER ) |
| mluis | 0:91d1a7783bb9 | 39 | # include <intrin.h> |
| mluis | 0:91d1a7783bb9 | 40 | # pragma intrinsic( memcpy ) |
| mluis | 0:91d1a7783bb9 | 41 | # endif |
| mluis | 0:91d1a7783bb9 | 42 | #endif |
| mluis | 0:91d1a7783bb9 | 43 | |
| mluis | 0:91d1a7783bb9 | 44 | |
| mluis | 0:91d1a7783bb9 | 45 | #include "mbed.h" |
| mluis | 0:91d1a7783bb9 | 46 | |
| mluis | 0:91d1a7783bb9 | 47 | /* define if you have fast 32-bit types on your system */ |
| mluis | 0:91d1a7783bb9 | 48 | #if 1 |
| mluis | 0:91d1a7783bb9 | 49 | # define HAVE_UINT_32T |
| mluis | 0:91d1a7783bb9 | 50 | #endif |
| mluis | 0:91d1a7783bb9 | 51 | |
| mluis | 0:91d1a7783bb9 | 52 | /* define if you don't want any tables */ |
| mluis | 0:91d1a7783bb9 | 53 | #if 1 |
| mluis | 0:91d1a7783bb9 | 54 | # define USE_TABLES |
| mluis | 0:91d1a7783bb9 | 55 | #endif |
| mluis | 0:91d1a7783bb9 | 56 | |
| mluis | 0:91d1a7783bb9 | 57 | /* On Intel Core 2 duo VERSION_1 is faster */ |
| mluis | 0:91d1a7783bb9 | 58 | |
| mluis | 0:91d1a7783bb9 | 59 | /* alternative versions (test for performance on your system) */ |
| mluis | 0:91d1a7783bb9 | 60 | #if 1 |
| mluis | 0:91d1a7783bb9 | 61 | # define VERSION_1 |
| mluis | 0:91d1a7783bb9 | 62 | #endif |
| mluis | 0:91d1a7783bb9 | 63 | |
| mluis | 0:91d1a7783bb9 | 64 | #include "aes.h" |
| mluis | 0:91d1a7783bb9 | 65 | |
| mluis | 0:91d1a7783bb9 | 66 | #if defined( HAVE_UINT_32T ) |
| mluis | 0:91d1a7783bb9 | 67 | typedef unsigned long uint_32t; |
| mluis | 0:91d1a7783bb9 | 68 | #endif |
| mluis | 0:91d1a7783bb9 | 69 | |
| mluis | 0:91d1a7783bb9 | 70 | /* functions for finite field multiplication in the AES Galois field */ |
| mluis | 0:91d1a7783bb9 | 71 | |
| mluis | 0:91d1a7783bb9 | 72 | #define WPOLY 0x011b |
| mluis | 0:91d1a7783bb9 | 73 | #define BPOLY 0x1b |
| mluis | 0:91d1a7783bb9 | 74 | #define DPOLY 0x008d |
| mluis | 0:91d1a7783bb9 | 75 | |
| mluis | 0:91d1a7783bb9 | 76 | #define f1(x) (x) |
| mluis | 0:91d1a7783bb9 | 77 | #define f2(x) ((x << 1) ^ (((x >> 7) & 1) * WPOLY)) |
| mluis | 0:91d1a7783bb9 | 78 | #define f4(x) ((x << 2) ^ (((x >> 6) & 1) * WPOLY) ^ (((x >> 6) & 2) * WPOLY)) |
| mluis | 0:91d1a7783bb9 | 79 | #define f8(x) ((x << 3) ^ (((x >> 5) & 1) * WPOLY) ^ (((x >> 5) & 2) * WPOLY) \ |
| mluis | 0:91d1a7783bb9 | 80 | ^ (((x >> 5) & 4) * WPOLY)) |
| mluis | 0:91d1a7783bb9 | 81 | #define d2(x) (((x) >> 1) ^ ((x) & 1 ? DPOLY : 0)) |
| mluis | 0:91d1a7783bb9 | 82 | |
| mluis | 0:91d1a7783bb9 | 83 | #define f3(x) (f2(x) ^ x) |
| mluis | 0:91d1a7783bb9 | 84 | #define f9(x) (f8(x) ^ x) |
| mluis | 0:91d1a7783bb9 | 85 | #define fb(x) (f8(x) ^ f2(x) ^ x) |
| mluis | 0:91d1a7783bb9 | 86 | #define fd(x) (f8(x) ^ f4(x) ^ x) |
| mluis | 0:91d1a7783bb9 | 87 | #define fe(x) (f8(x) ^ f4(x) ^ f2(x)) |
| mluis | 0:91d1a7783bb9 | 88 | |
| mluis | 0:91d1a7783bb9 | 89 | #if defined( USE_TABLES ) |
| mluis | 0:91d1a7783bb9 | 90 | |
| mluis | 0:91d1a7783bb9 | 91 | #define sb_data(w) { /* S Box data values */ \ |
| mluis | 0:91d1a7783bb9 | 92 | w(0x63), w(0x7c), w(0x77), w(0x7b), w(0xf2), w(0x6b), w(0x6f), w(0xc5),\ |
| mluis | 0:91d1a7783bb9 | 93 | w(0x30), w(0x01), w(0x67), w(0x2b), w(0xfe), w(0xd7), w(0xab), w(0x76),\ |
| mluis | 0:91d1a7783bb9 | 94 | w(0xca), w(0x82), w(0xc9), w(0x7d), w(0xfa), w(0x59), w(0x47), w(0xf0),\ |
| mluis | 0:91d1a7783bb9 | 95 | w(0xad), w(0xd4), w(0xa2), w(0xaf), w(0x9c), w(0xa4), w(0x72), w(0xc0),\ |
| mluis | 0:91d1a7783bb9 | 96 | w(0xb7), w(0xfd), w(0x93), w(0x26), w(0x36), w(0x3f), w(0xf7), w(0xcc),\ |
| mluis | 0:91d1a7783bb9 | 97 | w(0x34), w(0xa5), w(0xe5), w(0xf1), w(0x71), w(0xd8), w(0x31), w(0x15),\ |
| mluis | 0:91d1a7783bb9 | 98 | w(0x04), w(0xc7), w(0x23), w(0xc3), w(0x18), w(0x96), w(0x05), w(0x9a),\ |
| mluis | 0:91d1a7783bb9 | 99 | w(0x07), w(0x12), w(0x80), w(0xe2), w(0xeb), w(0x27), w(0xb2), w(0x75),\ |
| mluis | 0:91d1a7783bb9 | 100 | w(0x09), w(0x83), w(0x2c), w(0x1a), w(0x1b), w(0x6e), w(0x5a), w(0xa0),\ |
| mluis | 0:91d1a7783bb9 | 101 | w(0x52), w(0x3b), w(0xd6), w(0xb3), w(0x29), w(0xe3), w(0x2f), w(0x84),\ |
| mluis | 0:91d1a7783bb9 | 102 | w(0x53), w(0xd1), w(0x00), w(0xed), w(0x20), w(0xfc), w(0xb1), w(0x5b),\ |
| mluis | 0:91d1a7783bb9 | 103 | w(0x6a), w(0xcb), w(0xbe), w(0x39), w(0x4a), w(0x4c), w(0x58), w(0xcf),\ |
| mluis | 0:91d1a7783bb9 | 104 | w(0xd0), w(0xef), w(0xaa), w(0xfb), w(0x43), w(0x4d), w(0x33), w(0x85),\ |
| mluis | 0:91d1a7783bb9 | 105 | w(0x45), w(0xf9), w(0x02), w(0x7f), w(0x50), w(0x3c), w(0x9f), w(0xa8),\ |
| mluis | 0:91d1a7783bb9 | 106 | w(0x51), w(0xa3), w(0x40), w(0x8f), w(0x92), w(0x9d), w(0x38), w(0xf5),\ |
| mluis | 0:91d1a7783bb9 | 107 | w(0xbc), w(0xb6), w(0xda), w(0x21), w(0x10), w(0xff), w(0xf3), w(0xd2),\ |
| mluis | 0:91d1a7783bb9 | 108 | w(0xcd), w(0x0c), w(0x13), w(0xec), w(0x5f), w(0x97), w(0x44), w(0x17),\ |
| mluis | 0:91d1a7783bb9 | 109 | w(0xc4), w(0xa7), w(0x7e), w(0x3d), w(0x64), w(0x5d), w(0x19), w(0x73),\ |
| mluis | 0:91d1a7783bb9 | 110 | w(0x60), w(0x81), w(0x4f), w(0xdc), w(0x22), w(0x2a), w(0x90), w(0x88),\ |
| mluis | 0:91d1a7783bb9 | 111 | w(0x46), w(0xee), w(0xb8), w(0x14), w(0xde), w(0x5e), w(0x0b), w(0xdb),\ |
| mluis | 0:91d1a7783bb9 | 112 | w(0xe0), w(0x32), w(0x3a), w(0x0a), w(0x49), w(0x06), w(0x24), w(0x5c),\ |
| mluis | 0:91d1a7783bb9 | 113 | w(0xc2), w(0xd3), w(0xac), w(0x62), w(0x91), w(0x95), w(0xe4), w(0x79),\ |
| mluis | 0:91d1a7783bb9 | 114 | w(0xe7), w(0xc8), w(0x37), w(0x6d), w(0x8d), w(0xd5), w(0x4e), w(0xa9),\ |
| mluis | 0:91d1a7783bb9 | 115 | w(0x6c), w(0x56), w(0xf4), w(0xea), w(0x65), w(0x7a), w(0xae), w(0x08),\ |
| mluis | 0:91d1a7783bb9 | 116 | w(0xba), w(0x78), w(0x25), w(0x2e), w(0x1c), w(0xa6), w(0xb4), w(0xc6),\ |
| mluis | 0:91d1a7783bb9 | 117 | w(0xe8), w(0xdd), w(0x74), w(0x1f), w(0x4b), w(0xbd), w(0x8b), w(0x8a),\ |
| mluis | 0:91d1a7783bb9 | 118 | w(0x70), w(0x3e), w(0xb5), w(0x66), w(0x48), w(0x03), w(0xf6), w(0x0e),\ |
| mluis | 0:91d1a7783bb9 | 119 | w(0x61), w(0x35), w(0x57), w(0xb9), w(0x86), w(0xc1), w(0x1d), w(0x9e),\ |
| mluis | 0:91d1a7783bb9 | 120 | w(0xe1), w(0xf8), w(0x98), w(0x11), w(0x69), w(0xd9), w(0x8e), w(0x94),\ |
| mluis | 0:91d1a7783bb9 | 121 | w(0x9b), w(0x1e), w(0x87), w(0xe9), w(0xce), w(0x55), w(0x28), w(0xdf),\ |
| mluis | 0:91d1a7783bb9 | 122 | w(0x8c), w(0xa1), w(0x89), w(0x0d), w(0xbf), w(0xe6), w(0x42), w(0x68),\ |
| mluis | 0:91d1a7783bb9 | 123 | w(0x41), w(0x99), w(0x2d), w(0x0f), w(0xb0), w(0x54), w(0xbb), w(0x16) } |
| mluis | 0:91d1a7783bb9 | 124 | |
| mluis | 0:91d1a7783bb9 | 125 | #define isb_data(w) { /* inverse S Box data values */ \ |
| mluis | 0:91d1a7783bb9 | 126 | w(0x52), w(0x09), w(0x6a), w(0xd5), w(0x30), w(0x36), w(0xa5), w(0x38),\ |
| mluis | 0:91d1a7783bb9 | 127 | w(0xbf), w(0x40), w(0xa3), w(0x9e), w(0x81), w(0xf3), w(0xd7), w(0xfb),\ |
| mluis | 0:91d1a7783bb9 | 128 | w(0x7c), w(0xe3), w(0x39), w(0x82), w(0x9b), w(0x2f), w(0xff), w(0x87),\ |
| mluis | 0:91d1a7783bb9 | 129 | w(0x34), w(0x8e), w(0x43), w(0x44), w(0xc4), w(0xde), w(0xe9), w(0xcb),\ |
| mluis | 0:91d1a7783bb9 | 130 | w(0x54), w(0x7b), w(0x94), w(0x32), w(0xa6), w(0xc2), w(0x23), w(0x3d),\ |
| mluis | 0:91d1a7783bb9 | 131 | w(0xee), w(0x4c), w(0x95), w(0x0b), w(0x42), w(0xfa), w(0xc3), w(0x4e),\ |
| mluis | 0:91d1a7783bb9 | 132 | w(0x08), w(0x2e), w(0xa1), w(0x66), w(0x28), w(0xd9), w(0x24), w(0xb2),\ |
| mluis | 0:91d1a7783bb9 | 133 | w(0x76), w(0x5b), w(0xa2), w(0x49), w(0x6d), w(0x8b), w(0xd1), w(0x25),\ |
| mluis | 0:91d1a7783bb9 | 134 | w(0x72), w(0xf8), w(0xf6), w(0x64), w(0x86), w(0x68), w(0x98), w(0x16),\ |
| mluis | 0:91d1a7783bb9 | 135 | w(0xd4), w(0xa4), w(0x5c), w(0xcc), w(0x5d), w(0x65), w(0xb6), w(0x92),\ |
| mluis | 0:91d1a7783bb9 | 136 | w(0x6c), w(0x70), w(0x48), w(0x50), w(0xfd), w(0xed), w(0xb9), w(0xda),\ |
| mluis | 0:91d1a7783bb9 | 137 | w(0x5e), w(0x15), w(0x46), w(0x57), w(0xa7), w(0x8d), w(0x9d), w(0x84),\ |
| mluis | 0:91d1a7783bb9 | 138 | w(0x90), w(0xd8), w(0xab), w(0x00), w(0x8c), w(0xbc), w(0xd3), w(0x0a),\ |
| mluis | 0:91d1a7783bb9 | 139 | w(0xf7), w(0xe4), w(0x58), w(0x05), w(0xb8), w(0xb3), w(0x45), w(0x06),\ |
| mluis | 0:91d1a7783bb9 | 140 | w(0xd0), w(0x2c), w(0x1e), w(0x8f), w(0xca), w(0x3f), w(0x0f), w(0x02),\ |
| mluis | 0:91d1a7783bb9 | 141 | w(0xc1), w(0xaf), w(0xbd), w(0x03), w(0x01), w(0x13), w(0x8a), w(0x6b),\ |
| mluis | 0:91d1a7783bb9 | 142 | w(0x3a), w(0x91), w(0x11), w(0x41), w(0x4f), w(0x67), w(0xdc), w(0xea),\ |
| mluis | 0:91d1a7783bb9 | 143 | w(0x97), w(0xf2), w(0xcf), w(0xce), w(0xf0), w(0xb4), w(0xe6), w(0x73),\ |
| mluis | 0:91d1a7783bb9 | 144 | w(0x96), w(0xac), w(0x74), w(0x22), w(0xe7), w(0xad), w(0x35), w(0x85),\ |
| mluis | 0:91d1a7783bb9 | 145 | w(0xe2), w(0xf9), w(0x37), w(0xe8), w(0x1c), w(0x75), w(0xdf), w(0x6e),\ |
| mluis | 0:91d1a7783bb9 | 146 | w(0x47), w(0xf1), w(0x1a), w(0x71), w(0x1d), w(0x29), w(0xc5), w(0x89),\ |
| mluis | 0:91d1a7783bb9 | 147 | w(0x6f), w(0xb7), w(0x62), w(0x0e), w(0xaa), w(0x18), w(0xbe), w(0x1b),\ |
| mluis | 0:91d1a7783bb9 | 148 | w(0xfc), w(0x56), w(0x3e), w(0x4b), w(0xc6), w(0xd2), w(0x79), w(0x20),\ |
| mluis | 0:91d1a7783bb9 | 149 | w(0x9a), w(0xdb), w(0xc0), w(0xfe), w(0x78), w(0xcd), w(0x5a), w(0xf4),\ |
| mluis | 0:91d1a7783bb9 | 150 | w(0x1f), w(0xdd), w(0xa8), w(0x33), w(0x88), w(0x07), w(0xc7), w(0x31),\ |
| mluis | 0:91d1a7783bb9 | 151 | w(0xb1), w(0x12), w(0x10), w(0x59), w(0x27), w(0x80), w(0xec), w(0x5f),\ |
| mluis | 0:91d1a7783bb9 | 152 | w(0x60), w(0x51), w(0x7f), w(0xa9), w(0x19), w(0xb5), w(0x4a), w(0x0d),\ |
| mluis | 0:91d1a7783bb9 | 153 | w(0x2d), w(0xe5), w(0x7a), w(0x9f), w(0x93), w(0xc9), w(0x9c), w(0xef),\ |
| mluis | 0:91d1a7783bb9 | 154 | w(0xa0), w(0xe0), w(0x3b), w(0x4d), w(0xae), w(0x2a), w(0xf5), w(0xb0),\ |
| mluis | 0:91d1a7783bb9 | 155 | w(0xc8), w(0xeb), w(0xbb), w(0x3c), w(0x83), w(0x53), w(0x99), w(0x61),\ |
| mluis | 0:91d1a7783bb9 | 156 | w(0x17), w(0x2b), w(0x04), w(0x7e), w(0xba), w(0x77), w(0xd6), w(0x26),\ |
| mluis | 0:91d1a7783bb9 | 157 | w(0xe1), w(0x69), w(0x14), w(0x63), w(0x55), w(0x21), w(0x0c), w(0x7d) } |
| mluis | 0:91d1a7783bb9 | 158 | |
| mluis | 0:91d1a7783bb9 | 159 | #define mm_data(w) { /* basic data for forming finite field tables */ \ |
| mluis | 0:91d1a7783bb9 | 160 | w(0x00), w(0x01), w(0x02), w(0x03), w(0x04), w(0x05), w(0x06), w(0x07),\ |
| mluis | 0:91d1a7783bb9 | 161 | w(0x08), w(0x09), w(0x0a), w(0x0b), w(0x0c), w(0x0d), w(0x0e), w(0x0f),\ |
| mluis | 0:91d1a7783bb9 | 162 | w(0x10), w(0x11), w(0x12), w(0x13), w(0x14), w(0x15), w(0x16), w(0x17),\ |
| mluis | 0:91d1a7783bb9 | 163 | w(0x18), w(0x19), w(0x1a), w(0x1b), w(0x1c), w(0x1d), w(0x1e), w(0x1f),\ |
| mluis | 0:91d1a7783bb9 | 164 | w(0x20), w(0x21), w(0x22), w(0x23), w(0x24), w(0x25), w(0x26), w(0x27),\ |
| mluis | 0:91d1a7783bb9 | 165 | w(0x28), w(0x29), w(0x2a), w(0x2b), w(0x2c), w(0x2d), w(0x2e), w(0x2f),\ |
| mluis | 0:91d1a7783bb9 | 166 | w(0x30), w(0x31), w(0x32), w(0x33), w(0x34), w(0x35), w(0x36), w(0x37),\ |
| mluis | 0:91d1a7783bb9 | 167 | w(0x38), w(0x39), w(0x3a), w(0x3b), w(0x3c), w(0x3d), w(0x3e), w(0x3f),\ |
| mluis | 0:91d1a7783bb9 | 168 | w(0x40), w(0x41), w(0x42), w(0x43), w(0x44), w(0x45), w(0x46), w(0x47),\ |
| mluis | 0:91d1a7783bb9 | 169 | w(0x48), w(0x49), w(0x4a), w(0x4b), w(0x4c), w(0x4d), w(0x4e), w(0x4f),\ |
| mluis | 0:91d1a7783bb9 | 170 | w(0x50), w(0x51), w(0x52), w(0x53), w(0x54), w(0x55), w(0x56), w(0x57),\ |
| mluis | 0:91d1a7783bb9 | 171 | w(0x58), w(0x59), w(0x5a), w(0x5b), w(0x5c), w(0x5d), w(0x5e), w(0x5f),\ |
| mluis | 0:91d1a7783bb9 | 172 | w(0x60), w(0x61), w(0x62), w(0x63), w(0x64), w(0x65), w(0x66), w(0x67),\ |
| mluis | 0:91d1a7783bb9 | 173 | w(0x68), w(0x69), w(0x6a), w(0x6b), w(0x6c), w(0x6d), w(0x6e), w(0x6f),\ |
| mluis | 0:91d1a7783bb9 | 174 | w(0x70), w(0x71), w(0x72), w(0x73), w(0x74), w(0x75), w(0x76), w(0x77),\ |
| mluis | 0:91d1a7783bb9 | 175 | w(0x78), w(0x79), w(0x7a), w(0x7b), w(0x7c), w(0x7d), w(0x7e), w(0x7f),\ |
| mluis | 0:91d1a7783bb9 | 176 | w(0x80), w(0x81), w(0x82), w(0x83), w(0x84), w(0x85), w(0x86), w(0x87),\ |
| mluis | 0:91d1a7783bb9 | 177 | w(0x88), w(0x89), w(0x8a), w(0x8b), w(0x8c), w(0x8d), w(0x8e), w(0x8f),\ |
| mluis | 0:91d1a7783bb9 | 178 | w(0x90), w(0x91), w(0x92), w(0x93), w(0x94), w(0x95), w(0x96), w(0x97),\ |
| mluis | 0:91d1a7783bb9 | 179 | w(0x98), w(0x99), w(0x9a), w(0x9b), w(0x9c), w(0x9d), w(0x9e), w(0x9f),\ |
| mluis | 0:91d1a7783bb9 | 180 | w(0xa0), w(0xa1), w(0xa2), w(0xa3), w(0xa4), w(0xa5), w(0xa6), w(0xa7),\ |
| mluis | 0:91d1a7783bb9 | 181 | w(0xa8), w(0xa9), w(0xaa), w(0xab), w(0xac), w(0xad), w(0xae), w(0xaf),\ |
| mluis | 0:91d1a7783bb9 | 182 | w(0xb0), w(0xb1), w(0xb2), w(0xb3), w(0xb4), w(0xb5), w(0xb6), w(0xb7),\ |
| mluis | 0:91d1a7783bb9 | 183 | w(0xb8), w(0xb9), w(0xba), w(0xbb), w(0xbc), w(0xbd), w(0xbe), w(0xbf),\ |
| mluis | 0:91d1a7783bb9 | 184 | w(0xc0), w(0xc1), w(0xc2), w(0xc3), w(0xc4), w(0xc5), w(0xc6), w(0xc7),\ |
| mluis | 0:91d1a7783bb9 | 185 | w(0xc8), w(0xc9), w(0xca), w(0xcb), w(0xcc), w(0xcd), w(0xce), w(0xcf),\ |
| mluis | 0:91d1a7783bb9 | 186 | w(0xd0), w(0xd1), w(0xd2), w(0xd3), w(0xd4), w(0xd5), w(0xd6), w(0xd7),\ |
| mluis | 0:91d1a7783bb9 | 187 | w(0xd8), w(0xd9), w(0xda), w(0xdb), w(0xdc), w(0xdd), w(0xde), w(0xdf),\ |
| mluis | 0:91d1a7783bb9 | 188 | w(0xe0), w(0xe1), w(0xe2), w(0xe3), w(0xe4), w(0xe5), w(0xe6), w(0xe7),\ |
| mluis | 0:91d1a7783bb9 | 189 | w(0xe8), w(0xe9), w(0xea), w(0xeb), w(0xec), w(0xed), w(0xee), w(0xef),\ |
| mluis | 0:91d1a7783bb9 | 190 | w(0xf0), w(0xf1), w(0xf2), w(0xf3), w(0xf4), w(0xf5), w(0xf6), w(0xf7),\ |
| mluis | 0:91d1a7783bb9 | 191 | w(0xf8), w(0xf9), w(0xfa), w(0xfb), w(0xfc), w(0xfd), w(0xfe), w(0xff) } |
| mluis | 0:91d1a7783bb9 | 192 | |
| mluis | 0:91d1a7783bb9 | 193 | static const uint_8t sbox[256] = sb_data(f1); |
| mluis | 0:91d1a7783bb9 | 194 | |
| mluis | 0:91d1a7783bb9 | 195 | #if defined( AES_DEC_PREKEYED ) |
| mluis | 0:91d1a7783bb9 | 196 | static const uint_8t isbox[256] = isb_data(f1); |
| mluis | 0:91d1a7783bb9 | 197 | #endif |
| mluis | 0:91d1a7783bb9 | 198 | |
| mluis | 0:91d1a7783bb9 | 199 | static const uint_8t gfm2_sbox[256] = sb_data(f2); |
| mluis | 0:91d1a7783bb9 | 200 | static const uint_8t gfm3_sbox[256] = sb_data(f3); |
| mluis | 0:91d1a7783bb9 | 201 | |
| mluis | 0:91d1a7783bb9 | 202 | #if defined( AES_DEC_PREKEYED ) |
| mluis | 0:91d1a7783bb9 | 203 | static const uint_8t gfmul_9[256] = mm_data(f9); |
| mluis | 0:91d1a7783bb9 | 204 | static const uint_8t gfmul_b[256] = mm_data(fb); |
| mluis | 0:91d1a7783bb9 | 205 | static const uint_8t gfmul_d[256] = mm_data(fd); |
| mluis | 0:91d1a7783bb9 | 206 | static const uint_8t gfmul_e[256] = mm_data(fe); |
| mluis | 0:91d1a7783bb9 | 207 | #endif |
| mluis | 0:91d1a7783bb9 | 208 | |
| mluis | 0:91d1a7783bb9 | 209 | #define s_box(x) sbox[(x)] |
| mluis | 0:91d1a7783bb9 | 210 | #if defined( AES_DEC_PREKEYED ) |
| mluis | 0:91d1a7783bb9 | 211 | #define is_box(x) isbox[(x)] |
| mluis | 0:91d1a7783bb9 | 212 | #endif |
| mluis | 0:91d1a7783bb9 | 213 | #define gfm2_sb(x) gfm2_sbox[(x)] |
| mluis | 0:91d1a7783bb9 | 214 | #define gfm3_sb(x) gfm3_sbox[(x)] |
| mluis | 0:91d1a7783bb9 | 215 | #if defined( AES_DEC_PREKEYED ) |
| mluis | 0:91d1a7783bb9 | 216 | #define gfm_9(x) gfmul_9[(x)] |
| mluis | 0:91d1a7783bb9 | 217 | #define gfm_b(x) gfmul_b[(x)] |
| mluis | 0:91d1a7783bb9 | 218 | #define gfm_d(x) gfmul_d[(x)] |
| mluis | 0:91d1a7783bb9 | 219 | #define gfm_e(x) gfmul_e[(x)] |
| mluis | 0:91d1a7783bb9 | 220 | #endif |
| mluis | 0:91d1a7783bb9 | 221 | #else |
| mluis | 0:91d1a7783bb9 | 222 | |
| mluis | 0:91d1a7783bb9 | 223 | /* this is the high bit of x right shifted by 1 */ |
| mluis | 0:91d1a7783bb9 | 224 | /* position. Since the starting polynomial has */ |
| mluis | 0:91d1a7783bb9 | 225 | /* 9 bits (0x11b), this right shift keeps the */ |
| mluis | 0:91d1a7783bb9 | 226 | /* values of all top bits within a byte */ |
| mluis | 0:91d1a7783bb9 | 227 | |
| mluis | 0:91d1a7783bb9 | 228 | static uint_8t hibit(const uint_8t x) |
| mluis | 0:91d1a7783bb9 | 229 | { uint_8t r = (uint_8t)((x >> 1) | (x >> 2)); |
| mluis | 0:91d1a7783bb9 | 230 | |
| mluis | 0:91d1a7783bb9 | 231 | r |= (r >> 2); |
| mluis | 0:91d1a7783bb9 | 232 | r |= (r >> 4); |
| mluis | 0:91d1a7783bb9 | 233 | return (r + 1) >> 1; |
| mluis | 0:91d1a7783bb9 | 234 | } |
| mluis | 0:91d1a7783bb9 | 235 | |
| mluis | 0:91d1a7783bb9 | 236 | /* return the inverse of the finite field element x */ |
| mluis | 0:91d1a7783bb9 | 237 | |
| mluis | 0:91d1a7783bb9 | 238 | static uint_8t gf_inv(const uint_8t x) |
| mluis | 0:91d1a7783bb9 | 239 | { uint_8t p1 = x, p2 = BPOLY, n1 = hibit(x), n2 = 0x80, v1 = 1, v2 = 0; |
| mluis | 0:91d1a7783bb9 | 240 | |
| mluis | 0:91d1a7783bb9 | 241 | if(x < 2) |
| mluis | 0:91d1a7783bb9 | 242 | return x; |
| mluis | 0:91d1a7783bb9 | 243 | |
| mluis | 0:91d1a7783bb9 | 244 | for( ; ; ) |
| mluis | 0:91d1a7783bb9 | 245 | { |
| mluis | 0:91d1a7783bb9 | 246 | if(n1) |
| mluis | 0:91d1a7783bb9 | 247 | while(n2 >= n1) /* divide polynomial p2 by p1 */ |
| mluis | 0:91d1a7783bb9 | 248 | { |
| mluis | 0:91d1a7783bb9 | 249 | n2 /= n1; /* shift smaller polynomial left */ |
| mluis | 0:91d1a7783bb9 | 250 | p2 ^= (p1 * n2) & 0xff; /* and remove from larger one */ |
| mluis | 0:91d1a7783bb9 | 251 | v2 ^= (v1 * n2); /* shift accumulated value and */ |
| mluis | 0:91d1a7783bb9 | 252 | n2 = hibit(p2); /* add into result */ |
| mluis | 0:91d1a7783bb9 | 253 | } |
| mluis | 0:91d1a7783bb9 | 254 | else |
| mluis | 0:91d1a7783bb9 | 255 | return v1; |
| mluis | 0:91d1a7783bb9 | 256 | |
| mluis | 0:91d1a7783bb9 | 257 | if(n2) /* repeat with values swapped */ |
| mluis | 0:91d1a7783bb9 | 258 | while(n1 >= n2) |
| mluis | 0:91d1a7783bb9 | 259 | { |
| mluis | 0:91d1a7783bb9 | 260 | n1 /= n2; |
| mluis | 0:91d1a7783bb9 | 261 | p1 ^= p2 * n1; |
| mluis | 0:91d1a7783bb9 | 262 | v1 ^= v2 * n1; |
| mluis | 0:91d1a7783bb9 | 263 | n1 = hibit(p1); |
| mluis | 0:91d1a7783bb9 | 264 | } |
| mluis | 0:91d1a7783bb9 | 265 | else |
| mluis | 0:91d1a7783bb9 | 266 | return v2; |
| mluis | 0:91d1a7783bb9 | 267 | } |
| mluis | 0:91d1a7783bb9 | 268 | } |
| mluis | 0:91d1a7783bb9 | 269 | |
| mluis | 0:91d1a7783bb9 | 270 | /* The forward and inverse affine transformations used in the S-box */ |
| mluis | 0:91d1a7783bb9 | 271 | uint_8t fwd_affine(const uint_8t x) |
| mluis | 0:91d1a7783bb9 | 272 | { |
| mluis | 0:91d1a7783bb9 | 273 | #if defined( HAVE_UINT_32T ) |
| mluis | 0:91d1a7783bb9 | 274 | uint_32t w = x; |
| mluis | 0:91d1a7783bb9 | 275 | w ^= (w << 1) ^ (w << 2) ^ (w << 3) ^ (w << 4); |
| mluis | 0:91d1a7783bb9 | 276 | return 0x63 ^ ((w ^ (w >> 8)) & 0xff); |
| mluis | 0:91d1a7783bb9 | 277 | #else |
| mluis | 0:91d1a7783bb9 | 278 | return 0x63 ^ x ^ (x << 1) ^ (x << 2) ^ (x << 3) ^ (x << 4) |
| mluis | 0:91d1a7783bb9 | 279 | ^ (x >> 7) ^ (x >> 6) ^ (x >> 5) ^ (x >> 4); |
| mluis | 0:91d1a7783bb9 | 280 | #endif |
| mluis | 0:91d1a7783bb9 | 281 | } |
| mluis | 0:91d1a7783bb9 | 282 | |
| mluis | 0:91d1a7783bb9 | 283 | uint_8t inv_affine(const uint_8t x) |
| mluis | 0:91d1a7783bb9 | 284 | { |
| mluis | 0:91d1a7783bb9 | 285 | #if defined( HAVE_UINT_32T ) |
| mluis | 0:91d1a7783bb9 | 286 | uint_32t w = x; |
| mluis | 0:91d1a7783bb9 | 287 | w = (w << 1) ^ (w << 3) ^ (w << 6); |
| mluis | 0:91d1a7783bb9 | 288 | return 0x05 ^ ((w ^ (w >> 8)) & 0xff); |
| mluis | 0:91d1a7783bb9 | 289 | #else |
| mluis | 0:91d1a7783bb9 | 290 | return 0x05 ^ (x << 1) ^ (x << 3) ^ (x << 6) |
| mluis | 0:91d1a7783bb9 | 291 | ^ (x >> 7) ^ (x >> 5) ^ (x >> 2); |
| mluis | 0:91d1a7783bb9 | 292 | #endif |
| mluis | 0:91d1a7783bb9 | 293 | } |
| mluis | 0:91d1a7783bb9 | 294 | |
| mluis | 0:91d1a7783bb9 | 295 | #define s_box(x) fwd_affine(gf_inv(x)) |
| mluis | 0:91d1a7783bb9 | 296 | #define is_box(x) gf_inv(inv_affine(x)) |
| mluis | 0:91d1a7783bb9 | 297 | #define gfm2_sb(x) f2(s_box(x)) |
| mluis | 0:91d1a7783bb9 | 298 | #define gfm3_sb(x) f3(s_box(x)) |
| mluis | 0:91d1a7783bb9 | 299 | #define gfm_9(x) f9(x) |
| mluis | 0:91d1a7783bb9 | 300 | #define gfm_b(x) fb(x) |
| mluis | 0:91d1a7783bb9 | 301 | #define gfm_d(x) fd(x) |
| mluis | 0:91d1a7783bb9 | 302 | #define gfm_e(x) fe(x) |
| mluis | 0:91d1a7783bb9 | 303 | |
| mluis | 0:91d1a7783bb9 | 304 | #endif |
| mluis | 0:91d1a7783bb9 | 305 | |
| mluis | 0:91d1a7783bb9 | 306 | #if defined( HAVE_MEMCPY ) |
| mluis | 0:91d1a7783bb9 | 307 | # define block_copy_nn(d, s, l) memcpy(d, s, l) |
| mluis | 0:91d1a7783bb9 | 308 | # define block_copy(d, s) memcpy(d, s, N_BLOCK) |
| mluis | 0:91d1a7783bb9 | 309 | #else |
| mluis | 0:91d1a7783bb9 | 310 | # define block_copy_nn(d, s, l) copy_block_nn(d, s, l) |
| mluis | 0:91d1a7783bb9 | 311 | # define block_copy(d, s) copy_block(d, s) |
| mluis | 0:91d1a7783bb9 | 312 | #endif |
| mluis | 0:91d1a7783bb9 | 313 | |
| mluis | 0:91d1a7783bb9 | 314 | static void copy_block( void *d, const void *s ) |
| mluis | 0:91d1a7783bb9 | 315 | { |
| mluis | 0:91d1a7783bb9 | 316 | #if defined( HAVE_UINT_32T ) |
| mluis | 0:91d1a7783bb9 | 317 | ((uint_32t*)d)[ 0] = ((uint_32t*)s)[ 0]; |
| mluis | 0:91d1a7783bb9 | 318 | ((uint_32t*)d)[ 1] = ((uint_32t*)s)[ 1]; |
| mluis | 0:91d1a7783bb9 | 319 | ((uint_32t*)d)[ 2] = ((uint_32t*)s)[ 2]; |
| mluis | 0:91d1a7783bb9 | 320 | ((uint_32t*)d)[ 3] = ((uint_32t*)s)[ 3]; |
| mluis | 0:91d1a7783bb9 | 321 | #else |
| mluis | 0:91d1a7783bb9 | 322 | ((uint_8t*)d)[ 0] = ((uint_8t*)s)[ 0]; |
| mluis | 0:91d1a7783bb9 | 323 | ((uint_8t*)d)[ 1] = ((uint_8t*)s)[ 1]; |
| mluis | 0:91d1a7783bb9 | 324 | ((uint_8t*)d)[ 2] = ((uint_8t*)s)[ 2]; |
| mluis | 0:91d1a7783bb9 | 325 | ((uint_8t*)d)[ 3] = ((uint_8t*)s)[ 3]; |
| mluis | 0:91d1a7783bb9 | 326 | ((uint_8t*)d)[ 4] = ((uint_8t*)s)[ 4]; |
| mluis | 0:91d1a7783bb9 | 327 | ((uint_8t*)d)[ 5] = ((uint_8t*)s)[ 5]; |
| mluis | 0:91d1a7783bb9 | 328 | ((uint_8t*)d)[ 6] = ((uint_8t*)s)[ 6]; |
| mluis | 0:91d1a7783bb9 | 329 | ((uint_8t*)d)[ 7] = ((uint_8t*)s)[ 7]; |
| mluis | 0:91d1a7783bb9 | 330 | ((uint_8t*)d)[ 8] = ((uint_8t*)s)[ 8]; |
| mluis | 0:91d1a7783bb9 | 331 | ((uint_8t*)d)[ 9] = ((uint_8t*)s)[ 9]; |
| mluis | 0:91d1a7783bb9 | 332 | ((uint_8t*)d)[10] = ((uint_8t*)s)[10]; |
| mluis | 0:91d1a7783bb9 | 333 | ((uint_8t*)d)[11] = ((uint_8t*)s)[11]; |
| mluis | 0:91d1a7783bb9 | 334 | ((uint_8t*)d)[12] = ((uint_8t*)s)[12]; |
| mluis | 0:91d1a7783bb9 | 335 | ((uint_8t*)d)[13] = ((uint_8t*)s)[13]; |
| mluis | 0:91d1a7783bb9 | 336 | ((uint_8t*)d)[14] = ((uint_8t*)s)[14]; |
| mluis | 0:91d1a7783bb9 | 337 | ((uint_8t*)d)[15] = ((uint_8t*)s)[15]; |
| mluis | 0:91d1a7783bb9 | 338 | #endif |
| mluis | 0:91d1a7783bb9 | 339 | } |
| mluis | 0:91d1a7783bb9 | 340 | |
| mluis | 0:91d1a7783bb9 | 341 | static void copy_block_nn( uint_8t * d, const uint_8t *s, uint_8t nn ) |
| mluis | 0:91d1a7783bb9 | 342 | { |
| mluis | 0:91d1a7783bb9 | 343 | while( nn-- ) |
| mluis | 0:91d1a7783bb9 | 344 | //*((uint_8t*)d)++ = *((uint_8t*)s)++; |
| mluis | 0:91d1a7783bb9 | 345 | *d++ = *s++; |
| mluis | 0:91d1a7783bb9 | 346 | } |
| mluis | 0:91d1a7783bb9 | 347 | |
| mluis | 0:91d1a7783bb9 | 348 | static void xor_block( void *d, const void *s ) |
| mluis | 0:91d1a7783bb9 | 349 | { |
| mluis | 0:91d1a7783bb9 | 350 | #if defined( HAVE_UINT_32T ) |
| mluis | 0:91d1a7783bb9 | 351 | ((uint_32t*)d)[ 0] ^= ((uint_32t*)s)[ 0]; |
| mluis | 0:91d1a7783bb9 | 352 | ((uint_32t*)d)[ 1] ^= ((uint_32t*)s)[ 1]; |
| mluis | 0:91d1a7783bb9 | 353 | ((uint_32t*)d)[ 2] ^= ((uint_32t*)s)[ 2]; |
| mluis | 0:91d1a7783bb9 | 354 | ((uint_32t*)d)[ 3] ^= ((uint_32t*)s)[ 3]; |
| mluis | 0:91d1a7783bb9 | 355 | #else |
| mluis | 0:91d1a7783bb9 | 356 | ((uint_8t*)d)[ 0] ^= ((uint_8t*)s)[ 0]; |
| mluis | 0:91d1a7783bb9 | 357 | ((uint_8t*)d)[ 1] ^= ((uint_8t*)s)[ 1]; |
| mluis | 0:91d1a7783bb9 | 358 | ((uint_8t*)d)[ 2] ^= ((uint_8t*)s)[ 2]; |
| mluis | 0:91d1a7783bb9 | 359 | ((uint_8t*)d)[ 3] ^= ((uint_8t*)s)[ 3]; |
| mluis | 0:91d1a7783bb9 | 360 | ((uint_8t*)d)[ 4] ^= ((uint_8t*)s)[ 4]; |
| mluis | 0:91d1a7783bb9 | 361 | ((uint_8t*)d)[ 5] ^= ((uint_8t*)s)[ 5]; |
| mluis | 0:91d1a7783bb9 | 362 | ((uint_8t*)d)[ 6] ^= ((uint_8t*)s)[ 6]; |
| mluis | 0:91d1a7783bb9 | 363 | ((uint_8t*)d)[ 7] ^= ((uint_8t*)s)[ 7]; |
| mluis | 0:91d1a7783bb9 | 364 | ((uint_8t*)d)[ 8] ^= ((uint_8t*)s)[ 8]; |
| mluis | 0:91d1a7783bb9 | 365 | ((uint_8t*)d)[ 9] ^= ((uint_8t*)s)[ 9]; |
| mluis | 0:91d1a7783bb9 | 366 | ((uint_8t*)d)[10] ^= ((uint_8t*)s)[10]; |
| mluis | 0:91d1a7783bb9 | 367 | ((uint_8t*)d)[11] ^= ((uint_8t*)s)[11]; |
| mluis | 0:91d1a7783bb9 | 368 | ((uint_8t*)d)[12] ^= ((uint_8t*)s)[12]; |
| mluis | 0:91d1a7783bb9 | 369 | ((uint_8t*)d)[13] ^= ((uint_8t*)s)[13]; |
| mluis | 0:91d1a7783bb9 | 370 | ((uint_8t*)d)[14] ^= ((uint_8t*)s)[14]; |
| mluis | 0:91d1a7783bb9 | 371 | ((uint_8t*)d)[15] ^= ((uint_8t*)s)[15]; |
| mluis | 0:91d1a7783bb9 | 372 | #endif |
| mluis | 0:91d1a7783bb9 | 373 | } |
| mluis | 0:91d1a7783bb9 | 374 | |
| mluis | 0:91d1a7783bb9 | 375 | static void copy_and_key( void *d, const void *s, const void *k ) |
| mluis | 0:91d1a7783bb9 | 376 | { |
| mluis | 0:91d1a7783bb9 | 377 | #if defined( HAVE_UINT_32T ) |
| mluis | 0:91d1a7783bb9 | 378 | ((uint_32t*)d)[ 0] = ((uint_32t*)s)[ 0] ^ ((uint_32t*)k)[ 0]; |
| mluis | 0:91d1a7783bb9 | 379 | ((uint_32t*)d)[ 1] = ((uint_32t*)s)[ 1] ^ ((uint_32t*)k)[ 1]; |
| mluis | 0:91d1a7783bb9 | 380 | ((uint_32t*)d)[ 2] = ((uint_32t*)s)[ 2] ^ ((uint_32t*)k)[ 2]; |
| mluis | 0:91d1a7783bb9 | 381 | ((uint_32t*)d)[ 3] = ((uint_32t*)s)[ 3] ^ ((uint_32t*)k)[ 3]; |
| mluis | 0:91d1a7783bb9 | 382 | #elif 1 |
| mluis | 0:91d1a7783bb9 | 383 | ((uint_8t*)d)[ 0] = ((uint_8t*)s)[ 0] ^ ((uint_8t*)k)[ 0]; |
| mluis | 0:91d1a7783bb9 | 384 | ((uint_8t*)d)[ 1] = ((uint_8t*)s)[ 1] ^ ((uint_8t*)k)[ 1]; |
| mluis | 0:91d1a7783bb9 | 385 | ((uint_8t*)d)[ 2] = ((uint_8t*)s)[ 2] ^ ((uint_8t*)k)[ 2]; |
| mluis | 0:91d1a7783bb9 | 386 | ((uint_8t*)d)[ 3] = ((uint_8t*)s)[ 3] ^ ((uint_8t*)k)[ 3]; |
| mluis | 0:91d1a7783bb9 | 387 | ((uint_8t*)d)[ 4] = ((uint_8t*)s)[ 4] ^ ((uint_8t*)k)[ 4]; |
| mluis | 0:91d1a7783bb9 | 388 | ((uint_8t*)d)[ 5] = ((uint_8t*)s)[ 5] ^ ((uint_8t*)k)[ 5]; |
| mluis | 0:91d1a7783bb9 | 389 | ((uint_8t*)d)[ 6] = ((uint_8t*)s)[ 6] ^ ((uint_8t*)k)[ 6]; |
| mluis | 0:91d1a7783bb9 | 390 | ((uint_8t*)d)[ 7] = ((uint_8t*)s)[ 7] ^ ((uint_8t*)k)[ 7]; |
| mluis | 0:91d1a7783bb9 | 391 | ((uint_8t*)d)[ 8] = ((uint_8t*)s)[ 8] ^ ((uint_8t*)k)[ 8]; |
| mluis | 0:91d1a7783bb9 | 392 | ((uint_8t*)d)[ 9] = ((uint_8t*)s)[ 9] ^ ((uint_8t*)k)[ 9]; |
| mluis | 0:91d1a7783bb9 | 393 | ((uint_8t*)d)[10] = ((uint_8t*)s)[10] ^ ((uint_8t*)k)[10]; |
| mluis | 0:91d1a7783bb9 | 394 | ((uint_8t*)d)[11] = ((uint_8t*)s)[11] ^ ((uint_8t*)k)[11]; |
| mluis | 0:91d1a7783bb9 | 395 | ((uint_8t*)d)[12] = ((uint_8t*)s)[12] ^ ((uint_8t*)k)[12]; |
| mluis | 0:91d1a7783bb9 | 396 | ((uint_8t*)d)[13] = ((uint_8t*)s)[13] ^ ((uint_8t*)k)[13]; |
| mluis | 0:91d1a7783bb9 | 397 | ((uint_8t*)d)[14] = ((uint_8t*)s)[14] ^ ((uint_8t*)k)[14]; |
| mluis | 0:91d1a7783bb9 | 398 | ((uint_8t*)d)[15] = ((uint_8t*)s)[15] ^ ((uint_8t*)k)[15]; |
| mluis | 0:91d1a7783bb9 | 399 | #else |
| mluis | 0:91d1a7783bb9 | 400 | block_copy(d, s); |
| mluis | 0:91d1a7783bb9 | 401 | xor_block(d, k); |
| mluis | 0:91d1a7783bb9 | 402 | #endif |
| mluis | 0:91d1a7783bb9 | 403 | } |
| mluis | 0:91d1a7783bb9 | 404 | |
| mluis | 0:91d1a7783bb9 | 405 | static void add_round_key( uint_8t d[N_BLOCK], const uint_8t k[N_BLOCK] ) |
| mluis | 0:91d1a7783bb9 | 406 | { |
| mluis | 0:91d1a7783bb9 | 407 | xor_block(d, k); |
| mluis | 0:91d1a7783bb9 | 408 | } |
| mluis | 0:91d1a7783bb9 | 409 | |
| mluis | 0:91d1a7783bb9 | 410 | static void shift_sub_rows( uint_8t st[N_BLOCK] ) |
| mluis | 0:91d1a7783bb9 | 411 | { uint_8t tt; |
| mluis | 0:91d1a7783bb9 | 412 | |
| mluis | 0:91d1a7783bb9 | 413 | st[ 0] = s_box(st[ 0]); st[ 4] = s_box(st[ 4]); |
| mluis | 0:91d1a7783bb9 | 414 | st[ 8] = s_box(st[ 8]); st[12] = s_box(st[12]); |
| mluis | 0:91d1a7783bb9 | 415 | |
| mluis | 0:91d1a7783bb9 | 416 | tt = st[1]; st[ 1] = s_box(st[ 5]); st[ 5] = s_box(st[ 9]); |
| mluis | 0:91d1a7783bb9 | 417 | st[ 9] = s_box(st[13]); st[13] = s_box( tt ); |
| mluis | 0:91d1a7783bb9 | 418 | |
| mluis | 0:91d1a7783bb9 | 419 | tt = st[2]; st[ 2] = s_box(st[10]); st[10] = s_box( tt ); |
| mluis | 0:91d1a7783bb9 | 420 | tt = st[6]; st[ 6] = s_box(st[14]); st[14] = s_box( tt ); |
| mluis | 0:91d1a7783bb9 | 421 | |
| mluis | 0:91d1a7783bb9 | 422 | tt = st[15]; st[15] = s_box(st[11]); st[11] = s_box(st[ 7]); |
| mluis | 0:91d1a7783bb9 | 423 | st[ 7] = s_box(st[ 3]); st[ 3] = s_box( tt ); |
| mluis | 0:91d1a7783bb9 | 424 | } |
| mluis | 0:91d1a7783bb9 | 425 | |
| mluis | 0:91d1a7783bb9 | 426 | #if defined( AES_DEC_PREKEYED ) |
| mluis | 0:91d1a7783bb9 | 427 | |
| mluis | 0:91d1a7783bb9 | 428 | static void inv_shift_sub_rows( uint_8t st[N_BLOCK] ) |
| mluis | 0:91d1a7783bb9 | 429 | { uint_8t tt; |
| mluis | 0:91d1a7783bb9 | 430 | |
| mluis | 0:91d1a7783bb9 | 431 | st[ 0] = is_box(st[ 0]); st[ 4] = is_box(st[ 4]); |
| mluis | 0:91d1a7783bb9 | 432 | st[ 8] = is_box(st[ 8]); st[12] = is_box(st[12]); |
| mluis | 0:91d1a7783bb9 | 433 | |
| mluis | 0:91d1a7783bb9 | 434 | tt = st[13]; st[13] = is_box(st[9]); st[ 9] = is_box(st[5]); |
| mluis | 0:91d1a7783bb9 | 435 | st[ 5] = is_box(st[1]); st[ 1] = is_box( tt ); |
| mluis | 0:91d1a7783bb9 | 436 | |
| mluis | 0:91d1a7783bb9 | 437 | tt = st[2]; st[ 2] = is_box(st[10]); st[10] = is_box( tt ); |
| mluis | 0:91d1a7783bb9 | 438 | tt = st[6]; st[ 6] = is_box(st[14]); st[14] = is_box( tt ); |
| mluis | 0:91d1a7783bb9 | 439 | |
| mluis | 0:91d1a7783bb9 | 440 | tt = st[3]; st[ 3] = is_box(st[ 7]); st[ 7] = is_box(st[11]); |
| mluis | 0:91d1a7783bb9 | 441 | st[11] = is_box(st[15]); st[15] = is_box( tt ); |
| mluis | 0:91d1a7783bb9 | 442 | } |
| mluis | 0:91d1a7783bb9 | 443 | |
| mluis | 0:91d1a7783bb9 | 444 | #endif |
| mluis | 0:91d1a7783bb9 | 445 | |
| mluis | 0:91d1a7783bb9 | 446 | #if defined( VERSION_1 ) |
| mluis | 0:91d1a7783bb9 | 447 | static void mix_sub_columns( uint_8t dt[N_BLOCK] ) |
| mluis | 0:91d1a7783bb9 | 448 | { uint_8t st[N_BLOCK]; |
| mluis | 0:91d1a7783bb9 | 449 | block_copy(st, dt); |
| mluis | 0:91d1a7783bb9 | 450 | #else |
| mluis | 0:91d1a7783bb9 | 451 | static void mix_sub_columns( uint_8t dt[N_BLOCK], uint_8t st[N_BLOCK] ) |
| mluis | 0:91d1a7783bb9 | 452 | { |
| mluis | 0:91d1a7783bb9 | 453 | #endif |
| mluis | 0:91d1a7783bb9 | 454 | dt[ 0] = gfm2_sb(st[0]) ^ gfm3_sb(st[5]) ^ s_box(st[10]) ^ s_box(st[15]); |
| mluis | 0:91d1a7783bb9 | 455 | dt[ 1] = s_box(st[0]) ^ gfm2_sb(st[5]) ^ gfm3_sb(st[10]) ^ s_box(st[15]); |
| mluis | 0:91d1a7783bb9 | 456 | dt[ 2] = s_box(st[0]) ^ s_box(st[5]) ^ gfm2_sb(st[10]) ^ gfm3_sb(st[15]); |
| mluis | 0:91d1a7783bb9 | 457 | dt[ 3] = gfm3_sb(st[0]) ^ s_box(st[5]) ^ s_box(st[10]) ^ gfm2_sb(st[15]); |
| mluis | 0:91d1a7783bb9 | 458 | |
| mluis | 0:91d1a7783bb9 | 459 | dt[ 4] = gfm2_sb(st[4]) ^ gfm3_sb(st[9]) ^ s_box(st[14]) ^ s_box(st[3]); |
| mluis | 0:91d1a7783bb9 | 460 | dt[ 5] = s_box(st[4]) ^ gfm2_sb(st[9]) ^ gfm3_sb(st[14]) ^ s_box(st[3]); |
| mluis | 0:91d1a7783bb9 | 461 | dt[ 6] = s_box(st[4]) ^ s_box(st[9]) ^ gfm2_sb(st[14]) ^ gfm3_sb(st[3]); |
| mluis | 0:91d1a7783bb9 | 462 | dt[ 7] = gfm3_sb(st[4]) ^ s_box(st[9]) ^ s_box(st[14]) ^ gfm2_sb(st[3]); |
| mluis | 0:91d1a7783bb9 | 463 | |
| mluis | 0:91d1a7783bb9 | 464 | dt[ 8] = gfm2_sb(st[8]) ^ gfm3_sb(st[13]) ^ s_box(st[2]) ^ s_box(st[7]); |
| mluis | 0:91d1a7783bb9 | 465 | dt[ 9] = s_box(st[8]) ^ gfm2_sb(st[13]) ^ gfm3_sb(st[2]) ^ s_box(st[7]); |
| mluis | 0:91d1a7783bb9 | 466 | dt[10] = s_box(st[8]) ^ s_box(st[13]) ^ gfm2_sb(st[2]) ^ gfm3_sb(st[7]); |
| mluis | 0:91d1a7783bb9 | 467 | dt[11] = gfm3_sb(st[8]) ^ s_box(st[13]) ^ s_box(st[2]) ^ gfm2_sb(st[7]); |
| mluis | 0:91d1a7783bb9 | 468 | |
| mluis | 0:91d1a7783bb9 | 469 | dt[12] = gfm2_sb(st[12]) ^ gfm3_sb(st[1]) ^ s_box(st[6]) ^ s_box(st[11]); |
| mluis | 0:91d1a7783bb9 | 470 | dt[13] = s_box(st[12]) ^ gfm2_sb(st[1]) ^ gfm3_sb(st[6]) ^ s_box(st[11]); |
| mluis | 0:91d1a7783bb9 | 471 | dt[14] = s_box(st[12]) ^ s_box(st[1]) ^ gfm2_sb(st[6]) ^ gfm3_sb(st[11]); |
| mluis | 0:91d1a7783bb9 | 472 | dt[15] = gfm3_sb(st[12]) ^ s_box(st[1]) ^ s_box(st[6]) ^ gfm2_sb(st[11]); |
| mluis | 0:91d1a7783bb9 | 473 | } |
| mluis | 0:91d1a7783bb9 | 474 | |
| mluis | 0:91d1a7783bb9 | 475 | #if defined( AES_DEC_PREKEYED ) |
| mluis | 0:91d1a7783bb9 | 476 | |
| mluis | 0:91d1a7783bb9 | 477 | #if defined( VERSION_1 ) |
| mluis | 0:91d1a7783bb9 | 478 | static void inv_mix_sub_columns( uint_8t dt[N_BLOCK] ) |
| mluis | 0:91d1a7783bb9 | 479 | { uint_8t st[N_BLOCK]; |
| mluis | 0:91d1a7783bb9 | 480 | block_copy(st, dt); |
| mluis | 0:91d1a7783bb9 | 481 | #else |
| mluis | 0:91d1a7783bb9 | 482 | static void inv_mix_sub_columns( uint_8t dt[N_BLOCK], uint_8t st[N_BLOCK] ) |
| mluis | 0:91d1a7783bb9 | 483 | { |
| mluis | 0:91d1a7783bb9 | 484 | #endif |
| mluis | 0:91d1a7783bb9 | 485 | dt[ 0] = is_box(gfm_e(st[ 0]) ^ gfm_b(st[ 1]) ^ gfm_d(st[ 2]) ^ gfm_9(st[ 3])); |
| mluis | 0:91d1a7783bb9 | 486 | dt[ 5] = is_box(gfm_9(st[ 0]) ^ gfm_e(st[ 1]) ^ gfm_b(st[ 2]) ^ gfm_d(st[ 3])); |
| mluis | 0:91d1a7783bb9 | 487 | dt[10] = is_box(gfm_d(st[ 0]) ^ gfm_9(st[ 1]) ^ gfm_e(st[ 2]) ^ gfm_b(st[ 3])); |
| mluis | 0:91d1a7783bb9 | 488 | dt[15] = is_box(gfm_b(st[ 0]) ^ gfm_d(st[ 1]) ^ gfm_9(st[ 2]) ^ gfm_e(st[ 3])); |
| mluis | 0:91d1a7783bb9 | 489 | |
| mluis | 0:91d1a7783bb9 | 490 | dt[ 4] = is_box(gfm_e(st[ 4]) ^ gfm_b(st[ 5]) ^ gfm_d(st[ 6]) ^ gfm_9(st[ 7])); |
| mluis | 0:91d1a7783bb9 | 491 | dt[ 9] = is_box(gfm_9(st[ 4]) ^ gfm_e(st[ 5]) ^ gfm_b(st[ 6]) ^ gfm_d(st[ 7])); |
| mluis | 0:91d1a7783bb9 | 492 | dt[14] = is_box(gfm_d(st[ 4]) ^ gfm_9(st[ 5]) ^ gfm_e(st[ 6]) ^ gfm_b(st[ 7])); |
| mluis | 0:91d1a7783bb9 | 493 | dt[ 3] = is_box(gfm_b(st[ 4]) ^ gfm_d(st[ 5]) ^ gfm_9(st[ 6]) ^ gfm_e(st[ 7])); |
| mluis | 0:91d1a7783bb9 | 494 | |
| mluis | 0:91d1a7783bb9 | 495 | dt[ 8] = is_box(gfm_e(st[ 8]) ^ gfm_b(st[ 9]) ^ gfm_d(st[10]) ^ gfm_9(st[11])); |
| mluis | 0:91d1a7783bb9 | 496 | dt[13] = is_box(gfm_9(st[ 8]) ^ gfm_e(st[ 9]) ^ gfm_b(st[10]) ^ gfm_d(st[11])); |
| mluis | 0:91d1a7783bb9 | 497 | dt[ 2] = is_box(gfm_d(st[ 8]) ^ gfm_9(st[ 9]) ^ gfm_e(st[10]) ^ gfm_b(st[11])); |
| mluis | 0:91d1a7783bb9 | 498 | dt[ 7] = is_box(gfm_b(st[ 8]) ^ gfm_d(st[ 9]) ^ gfm_9(st[10]) ^ gfm_e(st[11])); |
| mluis | 0:91d1a7783bb9 | 499 | |
| mluis | 0:91d1a7783bb9 | 500 | dt[12] = is_box(gfm_e(st[12]) ^ gfm_b(st[13]) ^ gfm_d(st[14]) ^ gfm_9(st[15])); |
| mluis | 0:91d1a7783bb9 | 501 | dt[ 1] = is_box(gfm_9(st[12]) ^ gfm_e(st[13]) ^ gfm_b(st[14]) ^ gfm_d(st[15])); |
| mluis | 0:91d1a7783bb9 | 502 | dt[ 6] = is_box(gfm_d(st[12]) ^ gfm_9(st[13]) ^ gfm_e(st[14]) ^ gfm_b(st[15])); |
| mluis | 0:91d1a7783bb9 | 503 | dt[11] = is_box(gfm_b(st[12]) ^ gfm_d(st[13]) ^ gfm_9(st[14]) ^ gfm_e(st[15])); |
| mluis | 0:91d1a7783bb9 | 504 | } |
| mluis | 0:91d1a7783bb9 | 505 | |
| mluis | 0:91d1a7783bb9 | 506 | #endif |
| mluis | 0:91d1a7783bb9 | 507 | |
| mluis | 0:91d1a7783bb9 | 508 | #if defined( AES_ENC_PREKEYED ) || defined( AES_DEC_PREKEYED ) |
| mluis | 0:91d1a7783bb9 | 509 | |
| mluis | 0:91d1a7783bb9 | 510 | /* Set the cipher key for the pre-keyed version */ |
| mluis | 0:91d1a7783bb9 | 511 | |
| mluis | 0:91d1a7783bb9 | 512 | return_type aes_set_key( const unsigned char key[], length_type keylen, aes_context ctx[1] ) |
| mluis | 0:91d1a7783bb9 | 513 | { |
| mluis | 0:91d1a7783bb9 | 514 | uint_8t cc, rc, hi; |
| mluis | 0:91d1a7783bb9 | 515 | |
| mluis | 0:91d1a7783bb9 | 516 | switch( keylen ) |
| mluis | 0:91d1a7783bb9 | 517 | { |
| mluis | 0:91d1a7783bb9 | 518 | case 16: |
| mluis | 0:91d1a7783bb9 | 519 | case 24: |
| mluis | 0:91d1a7783bb9 | 520 | case 32: |
| mluis | 0:91d1a7783bb9 | 521 | break; |
| mluis | 0:91d1a7783bb9 | 522 | default: |
| mluis | 0:91d1a7783bb9 | 523 | ctx->rnd = 0; |
| mluis | 0:91d1a7783bb9 | 524 | return ( uint_8t )-1; |
| mluis | 0:91d1a7783bb9 | 525 | } |
| mluis | 0:91d1a7783bb9 | 526 | block_copy_nn(ctx->ksch, key, keylen); |
| mluis | 0:91d1a7783bb9 | 527 | hi = (keylen + 28) << 2; |
| mluis | 0:91d1a7783bb9 | 528 | ctx->rnd = (hi >> 4) - 1; |
| mluis | 0:91d1a7783bb9 | 529 | for( cc = keylen, rc = 1; cc < hi; cc += 4 ) |
| mluis | 0:91d1a7783bb9 | 530 | { uint_8t tt, t0, t1, t2, t3; |
| mluis | 0:91d1a7783bb9 | 531 | |
| mluis | 0:91d1a7783bb9 | 532 | t0 = ctx->ksch[cc - 4]; |
| mluis | 0:91d1a7783bb9 | 533 | t1 = ctx->ksch[cc - 3]; |
| mluis | 0:91d1a7783bb9 | 534 | t2 = ctx->ksch[cc - 2]; |
| mluis | 0:91d1a7783bb9 | 535 | t3 = ctx->ksch[cc - 1]; |
| mluis | 0:91d1a7783bb9 | 536 | if( cc % keylen == 0 ) |
| mluis | 0:91d1a7783bb9 | 537 | { |
| mluis | 0:91d1a7783bb9 | 538 | tt = t0; |
| mluis | 0:91d1a7783bb9 | 539 | t0 = s_box(t1) ^ rc; |
| mluis | 0:91d1a7783bb9 | 540 | t1 = s_box(t2); |
| mluis | 0:91d1a7783bb9 | 541 | t2 = s_box(t3); |
| mluis | 0:91d1a7783bb9 | 542 | t3 = s_box(tt); |
| mluis | 0:91d1a7783bb9 | 543 | rc = f2(rc); |
| mluis | 0:91d1a7783bb9 | 544 | } |
| mluis | 0:91d1a7783bb9 | 545 | else if( keylen > 24 && cc % keylen == 16 ) |
| mluis | 0:91d1a7783bb9 | 546 | { |
| mluis | 0:91d1a7783bb9 | 547 | t0 = s_box(t0); |
| mluis | 0:91d1a7783bb9 | 548 | t1 = s_box(t1); |
| mluis | 0:91d1a7783bb9 | 549 | t2 = s_box(t2); |
| mluis | 0:91d1a7783bb9 | 550 | t3 = s_box(t3); |
| mluis | 0:91d1a7783bb9 | 551 | } |
| mluis | 0:91d1a7783bb9 | 552 | tt = cc - keylen; |
| mluis | 0:91d1a7783bb9 | 553 | ctx->ksch[cc + 0] = ctx->ksch[tt + 0] ^ t0; |
| mluis | 0:91d1a7783bb9 | 554 | ctx->ksch[cc + 1] = ctx->ksch[tt + 1] ^ t1; |
| mluis | 0:91d1a7783bb9 | 555 | ctx->ksch[cc + 2] = ctx->ksch[tt + 2] ^ t2; |
| mluis | 0:91d1a7783bb9 | 556 | ctx->ksch[cc + 3] = ctx->ksch[tt + 3] ^ t3; |
| mluis | 0:91d1a7783bb9 | 557 | } |
| mluis | 0:91d1a7783bb9 | 558 | return 0; |
| mluis | 0:91d1a7783bb9 | 559 | } |
| mluis | 0:91d1a7783bb9 | 560 | |
| mluis | 0:91d1a7783bb9 | 561 | #endif |
| mluis | 0:91d1a7783bb9 | 562 | |
| mluis | 0:91d1a7783bb9 | 563 | #if defined( AES_ENC_PREKEYED ) |
| mluis | 0:91d1a7783bb9 | 564 | |
| mluis | 0:91d1a7783bb9 | 565 | /* Encrypt a single block of 16 bytes */ |
| mluis | 0:91d1a7783bb9 | 566 | |
| mluis | 0:91d1a7783bb9 | 567 | return_type aes_encrypt( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK], const aes_context ctx[1] ) |
| mluis | 0:91d1a7783bb9 | 568 | { |
| mluis | 0:91d1a7783bb9 | 569 | if( ctx->rnd ) |
| mluis | 0:91d1a7783bb9 | 570 | { |
| mluis | 0:91d1a7783bb9 | 571 | uint_8t s1[N_BLOCK], r; |
| mluis | 0:91d1a7783bb9 | 572 | copy_and_key( s1, in, ctx->ksch ); |
| mluis | 0:91d1a7783bb9 | 573 | |
| mluis | 0:91d1a7783bb9 | 574 | for( r = 1 ; r < ctx->rnd ; ++r ) |
| mluis | 0:91d1a7783bb9 | 575 | #if defined( VERSION_1 ) |
| mluis | 0:91d1a7783bb9 | 576 | { |
| mluis | 0:91d1a7783bb9 | 577 | mix_sub_columns( s1 ); |
| mluis | 0:91d1a7783bb9 | 578 | add_round_key( s1, ctx->ksch + r * N_BLOCK); |
| mluis | 0:91d1a7783bb9 | 579 | } |
| mluis | 0:91d1a7783bb9 | 580 | #else |
| mluis | 0:91d1a7783bb9 | 581 | { uint_8t s2[N_BLOCK]; |
| mluis | 0:91d1a7783bb9 | 582 | mix_sub_columns( s2, s1 ); |
| mluis | 0:91d1a7783bb9 | 583 | copy_and_key( s1, s2, ctx->ksch + r * N_BLOCK); |
| mluis | 0:91d1a7783bb9 | 584 | } |
| mluis | 0:91d1a7783bb9 | 585 | #endif |
| mluis | 0:91d1a7783bb9 | 586 | shift_sub_rows( s1 ); |
| mluis | 0:91d1a7783bb9 | 587 | copy_and_key( out, s1, ctx->ksch + r * N_BLOCK ); |
| mluis | 0:91d1a7783bb9 | 588 | } |
| mluis | 0:91d1a7783bb9 | 589 | else |
| mluis | 0:91d1a7783bb9 | 590 | return ( uint_8t )-1; |
| mluis | 0:91d1a7783bb9 | 591 | return 0; |
| mluis | 0:91d1a7783bb9 | 592 | } |
| mluis | 0:91d1a7783bb9 | 593 | |
| mluis | 0:91d1a7783bb9 | 594 | /* CBC encrypt a number of blocks (input and return an IV) */ |
| mluis | 0:91d1a7783bb9 | 595 | |
| mluis | 0:91d1a7783bb9 | 596 | return_type aes_cbc_encrypt( const unsigned char *in, unsigned char *out, |
| mluis | 0:91d1a7783bb9 | 597 | int n_block, unsigned char iv[N_BLOCK], const aes_context ctx[1] ) |
| mluis | 0:91d1a7783bb9 | 598 | { |
| mluis | 0:91d1a7783bb9 | 599 | |
| mluis | 0:91d1a7783bb9 | 600 | while(n_block--) |
| mluis | 0:91d1a7783bb9 | 601 | { |
| mluis | 0:91d1a7783bb9 | 602 | xor_block(iv, in); |
| mluis | 0:91d1a7783bb9 | 603 | if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS) |
| mluis | 0:91d1a7783bb9 | 604 | return EXIT_FAILURE; |
| mluis | 0:91d1a7783bb9 | 605 | //memcpy(out, iv, N_BLOCK); |
| mluis | 0:91d1a7783bb9 | 606 | block_copy(out, iv); |
| mluis | 0:91d1a7783bb9 | 607 | in += N_BLOCK; |
| mluis | 0:91d1a7783bb9 | 608 | out += N_BLOCK; |
| mluis | 0:91d1a7783bb9 | 609 | } |
| mluis | 0:91d1a7783bb9 | 610 | return EXIT_SUCCESS; |
| mluis | 0:91d1a7783bb9 | 611 | } |
| mluis | 0:91d1a7783bb9 | 612 | |
| mluis | 0:91d1a7783bb9 | 613 | #endif |
| mluis | 0:91d1a7783bb9 | 614 | |
| mluis | 0:91d1a7783bb9 | 615 | #if defined( AES_DEC_PREKEYED ) |
| mluis | 0:91d1a7783bb9 | 616 | |
| mluis | 0:91d1a7783bb9 | 617 | /* Decrypt a single block of 16 bytes */ |
| mluis | 0:91d1a7783bb9 | 618 | |
| mluis | 0:91d1a7783bb9 | 619 | return_type aes_decrypt( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK], const aes_context ctx[1] ) |
| mluis | 0:91d1a7783bb9 | 620 | { |
| mluis | 0:91d1a7783bb9 | 621 | if( ctx->rnd ) |
| mluis | 0:91d1a7783bb9 | 622 | { |
| mluis | 0:91d1a7783bb9 | 623 | uint_8t s1[N_BLOCK], r; |
| mluis | 0:91d1a7783bb9 | 624 | copy_and_key( s1, in, ctx->ksch + ctx->rnd * N_BLOCK ); |
| mluis | 0:91d1a7783bb9 | 625 | inv_shift_sub_rows( s1 ); |
| mluis | 0:91d1a7783bb9 | 626 | |
| mluis | 0:91d1a7783bb9 | 627 | for( r = ctx->rnd ; --r ; ) |
| mluis | 0:91d1a7783bb9 | 628 | #if defined( VERSION_1 ) |
| mluis | 0:91d1a7783bb9 | 629 | { |
| mluis | 0:91d1a7783bb9 | 630 | add_round_key( s1, ctx->ksch + r * N_BLOCK ); |
| mluis | 0:91d1a7783bb9 | 631 | inv_mix_sub_columns( s1 ); |
| mluis | 0:91d1a7783bb9 | 632 | } |
| mluis | 0:91d1a7783bb9 | 633 | #else |
| mluis | 0:91d1a7783bb9 | 634 | { uint_8t s2[N_BLOCK]; |
| mluis | 0:91d1a7783bb9 | 635 | copy_and_key( s2, s1, ctx->ksch + r * N_BLOCK ); |
| mluis | 0:91d1a7783bb9 | 636 | inv_mix_sub_columns( s1, s2 ); |
| mluis | 0:91d1a7783bb9 | 637 | } |
| mluis | 0:91d1a7783bb9 | 638 | #endif |
| mluis | 0:91d1a7783bb9 | 639 | copy_and_key( out, s1, ctx->ksch ); |
| mluis | 0:91d1a7783bb9 | 640 | } |
| mluis | 0:91d1a7783bb9 | 641 | else |
| mluis | 0:91d1a7783bb9 | 642 | return -1; |
| mluis | 0:91d1a7783bb9 | 643 | return 0; |
| mluis | 0:91d1a7783bb9 | 644 | } |
| mluis | 0:91d1a7783bb9 | 645 | |
| mluis | 0:91d1a7783bb9 | 646 | /* CBC decrypt a number of blocks (input and return an IV) */ |
| mluis | 0:91d1a7783bb9 | 647 | |
| mluis | 0:91d1a7783bb9 | 648 | return_type aes_cbc_decrypt( const unsigned char *in, unsigned char *out, |
| mluis | 0:91d1a7783bb9 | 649 | int n_block, unsigned char iv[N_BLOCK], const aes_context ctx[1] ) |
| mluis | 0:91d1a7783bb9 | 650 | { |
| mluis | 0:91d1a7783bb9 | 651 | while(n_block--) |
| mluis | 0:91d1a7783bb9 | 652 | { uint_8t tmp[N_BLOCK]; |
| mluis | 0:91d1a7783bb9 | 653 | |
| mluis | 0:91d1a7783bb9 | 654 | //memcpy(tmp, in, N_BLOCK); |
| mluis | 0:91d1a7783bb9 | 655 | block_copy(tmp, in); |
| mluis | 0:91d1a7783bb9 | 656 | if(aes_decrypt(in, out, ctx) != EXIT_SUCCESS) |
| mluis | 0:91d1a7783bb9 | 657 | return EXIT_FAILURE; |
| mluis | 0:91d1a7783bb9 | 658 | xor_block(out, iv); |
| mluis | 0:91d1a7783bb9 | 659 | //memcpy(iv, tmp, N_BLOCK); |
| mluis | 0:91d1a7783bb9 | 660 | block_copy(iv, tmp); |
| mluis | 0:91d1a7783bb9 | 661 | in += N_BLOCK; |
| mluis | 0:91d1a7783bb9 | 662 | out += N_BLOCK; |
| mluis | 0:91d1a7783bb9 | 663 | } |
| mluis | 0:91d1a7783bb9 | 664 | return EXIT_SUCCESS; |
| mluis | 0:91d1a7783bb9 | 665 | } |
| mluis | 0:91d1a7783bb9 | 666 | |
| mluis | 0:91d1a7783bb9 | 667 | #endif |
| mluis | 0:91d1a7783bb9 | 668 | |
| mluis | 0:91d1a7783bb9 | 669 | #if defined( AES_ENC_128_OTFK ) |
| mluis | 0:91d1a7783bb9 | 670 | |
| mluis | 0:91d1a7783bb9 | 671 | /* The 'on the fly' encryption key update for for 128 bit keys */ |
| mluis | 0:91d1a7783bb9 | 672 | |
| mluis | 0:91d1a7783bb9 | 673 | static void update_encrypt_key_128( uint_8t k[N_BLOCK], uint_8t *rc ) |
| mluis | 0:91d1a7783bb9 | 674 | { uint_8t cc; |
| mluis | 0:91d1a7783bb9 | 675 | |
| mluis | 0:91d1a7783bb9 | 676 | k[0] ^= s_box(k[13]) ^ *rc; |
| mluis | 0:91d1a7783bb9 | 677 | k[1] ^= s_box(k[14]); |
| mluis | 0:91d1a7783bb9 | 678 | k[2] ^= s_box(k[15]); |
| mluis | 0:91d1a7783bb9 | 679 | k[3] ^= s_box(k[12]); |
| mluis | 0:91d1a7783bb9 | 680 | *rc = f2( *rc ); |
| mluis | 0:91d1a7783bb9 | 681 | |
| mluis | 0:91d1a7783bb9 | 682 | for(cc = 4; cc < 16; cc += 4 ) |
| mluis | 0:91d1a7783bb9 | 683 | { |
| mluis | 0:91d1a7783bb9 | 684 | k[cc + 0] ^= k[cc - 4]; |
| mluis | 0:91d1a7783bb9 | 685 | k[cc + 1] ^= k[cc - 3]; |
| mluis | 0:91d1a7783bb9 | 686 | k[cc + 2] ^= k[cc - 2]; |
| mluis | 0:91d1a7783bb9 | 687 | k[cc + 3] ^= k[cc - 1]; |
| mluis | 0:91d1a7783bb9 | 688 | } |
| mluis | 0:91d1a7783bb9 | 689 | } |
| mluis | 0:91d1a7783bb9 | 690 | |
| mluis | 0:91d1a7783bb9 | 691 | /* Encrypt a single block of 16 bytes with 'on the fly' 128 bit keying */ |
| mluis | 0:91d1a7783bb9 | 692 | |
| mluis | 0:91d1a7783bb9 | 693 | void aes_encrypt_128( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK], |
| mluis | 0:91d1a7783bb9 | 694 | const unsigned char key[N_BLOCK], unsigned char o_key[N_BLOCK] ) |
| mluis | 0:91d1a7783bb9 | 695 | { uint_8t s1[N_BLOCK], r, rc = 1; |
| mluis | 0:91d1a7783bb9 | 696 | |
| mluis | 0:91d1a7783bb9 | 697 | if(o_key != key) |
| mluis | 0:91d1a7783bb9 | 698 | block_copy( o_key, key ); |
| mluis | 0:91d1a7783bb9 | 699 | copy_and_key( s1, in, o_key ); |
| mluis | 0:91d1a7783bb9 | 700 | |
| mluis | 0:91d1a7783bb9 | 701 | for( r = 1 ; r < 10 ; ++r ) |
| mluis | 0:91d1a7783bb9 | 702 | #if defined( VERSION_1 ) |
| mluis | 0:91d1a7783bb9 | 703 | { |
| mluis | 0:91d1a7783bb9 | 704 | mix_sub_columns( s1 ); |
| mluis | 0:91d1a7783bb9 | 705 | update_encrypt_key_128( o_key, &rc ); |
| mluis | 0:91d1a7783bb9 | 706 | add_round_key( s1, o_key ); |
| mluis | 0:91d1a7783bb9 | 707 | } |
| mluis | 0:91d1a7783bb9 | 708 | #else |
| mluis | 0:91d1a7783bb9 | 709 | { uint_8t s2[N_BLOCK]; |
| mluis | 0:91d1a7783bb9 | 710 | mix_sub_columns( s2, s1 ); |
| mluis | 0:91d1a7783bb9 | 711 | update_encrypt_key_128( o_key, &rc ); |
| mluis | 0:91d1a7783bb9 | 712 | copy_and_key( s1, s2, o_key ); |
| mluis | 0:91d1a7783bb9 | 713 | } |
| mluis | 0:91d1a7783bb9 | 714 | #endif |
| mluis | 0:91d1a7783bb9 | 715 | |
| mluis | 0:91d1a7783bb9 | 716 | shift_sub_rows( s1 ); |
| mluis | 0:91d1a7783bb9 | 717 | update_encrypt_key_128( o_key, &rc ); |
| mluis | 0:91d1a7783bb9 | 718 | copy_and_key( out, s1, o_key ); |
| mluis | 0:91d1a7783bb9 | 719 | } |
| mluis | 0:91d1a7783bb9 | 720 | |
| mluis | 0:91d1a7783bb9 | 721 | #endif |
| mluis | 0:91d1a7783bb9 | 722 | |
| mluis | 0:91d1a7783bb9 | 723 | #if defined( AES_DEC_128_OTFK ) |
| mluis | 0:91d1a7783bb9 | 724 | |
| mluis | 0:91d1a7783bb9 | 725 | /* The 'on the fly' decryption key update for for 128 bit keys */ |
| mluis | 0:91d1a7783bb9 | 726 | |
| mluis | 0:91d1a7783bb9 | 727 | static void update_decrypt_key_128( uint_8t k[N_BLOCK], uint_8t *rc ) |
| mluis | 0:91d1a7783bb9 | 728 | { uint_8t cc; |
| mluis | 0:91d1a7783bb9 | 729 | |
| mluis | 0:91d1a7783bb9 | 730 | for( cc = 12; cc > 0; cc -= 4 ) |
| mluis | 0:91d1a7783bb9 | 731 | { |
| mluis | 0:91d1a7783bb9 | 732 | k[cc + 0] ^= k[cc - 4]; |
| mluis | 0:91d1a7783bb9 | 733 | k[cc + 1] ^= k[cc - 3]; |
| mluis | 0:91d1a7783bb9 | 734 | k[cc + 2] ^= k[cc - 2]; |
| mluis | 0:91d1a7783bb9 | 735 | k[cc + 3] ^= k[cc - 1]; |
| mluis | 0:91d1a7783bb9 | 736 | } |
| mluis | 0:91d1a7783bb9 | 737 | *rc = d2(*rc); |
| mluis | 0:91d1a7783bb9 | 738 | k[0] ^= s_box(k[13]) ^ *rc; |
| mluis | 0:91d1a7783bb9 | 739 | k[1] ^= s_box(k[14]); |
| mluis | 0:91d1a7783bb9 | 740 | k[2] ^= s_box(k[15]); |
| mluis | 0:91d1a7783bb9 | 741 | k[3] ^= s_box(k[12]); |
| mluis | 0:91d1a7783bb9 | 742 | } |
| mluis | 0:91d1a7783bb9 | 743 | |
| mluis | 0:91d1a7783bb9 | 744 | /* Decrypt a single block of 16 bytes with 'on the fly' 128 bit keying */ |
| mluis | 0:91d1a7783bb9 | 745 | |
| mluis | 0:91d1a7783bb9 | 746 | void aes_decrypt_128( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK], |
| mluis | 0:91d1a7783bb9 | 747 | const unsigned char key[N_BLOCK], unsigned char o_key[N_BLOCK] ) |
| mluis | 0:91d1a7783bb9 | 748 | { |
| mluis | 0:91d1a7783bb9 | 749 | uint_8t s1[N_BLOCK], r, rc = 0x6c; |
| mluis | 0:91d1a7783bb9 | 750 | if(o_key != key) |
| mluis | 0:91d1a7783bb9 | 751 | block_copy( o_key, key ); |
| mluis | 0:91d1a7783bb9 | 752 | |
| mluis | 0:91d1a7783bb9 | 753 | copy_and_key( s1, in, o_key ); |
| mluis | 0:91d1a7783bb9 | 754 | inv_shift_sub_rows( s1 ); |
| mluis | 0:91d1a7783bb9 | 755 | |
| mluis | 0:91d1a7783bb9 | 756 | for( r = 10 ; --r ; ) |
| mluis | 0:91d1a7783bb9 | 757 | #if defined( VERSION_1 ) |
| mluis | 0:91d1a7783bb9 | 758 | { |
| mluis | 0:91d1a7783bb9 | 759 | update_decrypt_key_128( o_key, &rc ); |
| mluis | 0:91d1a7783bb9 | 760 | add_round_key( s1, o_key ); |
| mluis | 0:91d1a7783bb9 | 761 | inv_mix_sub_columns( s1 ); |
| mluis | 0:91d1a7783bb9 | 762 | } |
| mluis | 0:91d1a7783bb9 | 763 | #else |
| mluis | 0:91d1a7783bb9 | 764 | { uint_8t s2[N_BLOCK]; |
| mluis | 0:91d1a7783bb9 | 765 | update_decrypt_key_128( o_key, &rc ); |
| mluis | 0:91d1a7783bb9 | 766 | copy_and_key( s2, s1, o_key ); |
| mluis | 0:91d1a7783bb9 | 767 | inv_mix_sub_columns( s1, s2 ); |
| mluis | 0:91d1a7783bb9 | 768 | } |
| mluis | 0:91d1a7783bb9 | 769 | #endif |
| mluis | 0:91d1a7783bb9 | 770 | update_decrypt_key_128( o_key, &rc ); |
| mluis | 0:91d1a7783bb9 | 771 | copy_and_key( out, s1, o_key ); |
| mluis | 0:91d1a7783bb9 | 772 | } |
| mluis | 0:91d1a7783bb9 | 773 | |
| mluis | 0:91d1a7783bb9 | 774 | #endif |
| mluis | 0:91d1a7783bb9 | 775 | |
| mluis | 0:91d1a7783bb9 | 776 | #if defined( AES_ENC_256_OTFK ) |
| mluis | 0:91d1a7783bb9 | 777 | |
| mluis | 0:91d1a7783bb9 | 778 | /* The 'on the fly' encryption key update for for 256 bit keys */ |
| mluis | 0:91d1a7783bb9 | 779 | |
| mluis | 0:91d1a7783bb9 | 780 | static void update_encrypt_key_256( uint_8t k[2 * N_BLOCK], uint_8t *rc ) |
| mluis | 0:91d1a7783bb9 | 781 | { uint_8t cc; |
| mluis | 0:91d1a7783bb9 | 782 | |
| mluis | 0:91d1a7783bb9 | 783 | k[0] ^= s_box(k[29]) ^ *rc; |
| mluis | 0:91d1a7783bb9 | 784 | k[1] ^= s_box(k[30]); |
| mluis | 0:91d1a7783bb9 | 785 | k[2] ^= s_box(k[31]); |
| mluis | 0:91d1a7783bb9 | 786 | k[3] ^= s_box(k[28]); |
| mluis | 0:91d1a7783bb9 | 787 | *rc = f2( *rc ); |
| mluis | 0:91d1a7783bb9 | 788 | |
| mluis | 0:91d1a7783bb9 | 789 | for(cc = 4; cc < 16; cc += 4) |
| mluis | 0:91d1a7783bb9 | 790 | { |
| mluis | 0:91d1a7783bb9 | 791 | k[cc + 0] ^= k[cc - 4]; |
| mluis | 0:91d1a7783bb9 | 792 | k[cc + 1] ^= k[cc - 3]; |
| mluis | 0:91d1a7783bb9 | 793 | k[cc + 2] ^= k[cc - 2]; |
| mluis | 0:91d1a7783bb9 | 794 | k[cc + 3] ^= k[cc - 1]; |
| mluis | 0:91d1a7783bb9 | 795 | } |
| mluis | 0:91d1a7783bb9 | 796 | |
| mluis | 0:91d1a7783bb9 | 797 | k[16] ^= s_box(k[12]); |
| mluis | 0:91d1a7783bb9 | 798 | k[17] ^= s_box(k[13]); |
| mluis | 0:91d1a7783bb9 | 799 | k[18] ^= s_box(k[14]); |
| mluis | 0:91d1a7783bb9 | 800 | k[19] ^= s_box(k[15]); |
| mluis | 0:91d1a7783bb9 | 801 | |
| mluis | 0:91d1a7783bb9 | 802 | for( cc = 20; cc < 32; cc += 4 ) |
| mluis | 0:91d1a7783bb9 | 803 | { |
| mluis | 0:91d1a7783bb9 | 804 | k[cc + 0] ^= k[cc - 4]; |
| mluis | 0:91d1a7783bb9 | 805 | k[cc + 1] ^= k[cc - 3]; |
| mluis | 0:91d1a7783bb9 | 806 | k[cc + 2] ^= k[cc - 2]; |
| mluis | 0:91d1a7783bb9 | 807 | k[cc + 3] ^= k[cc - 1]; |
| mluis | 0:91d1a7783bb9 | 808 | } |
| mluis | 0:91d1a7783bb9 | 809 | } |
| mluis | 0:91d1a7783bb9 | 810 | |
| mluis | 0:91d1a7783bb9 | 811 | /* Encrypt a single block of 16 bytes with 'on the fly' 256 bit keying */ |
| mluis | 0:91d1a7783bb9 | 812 | |
| mluis | 0:91d1a7783bb9 | 813 | void aes_encrypt_256( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK], |
| mluis | 0:91d1a7783bb9 | 814 | const unsigned char key[2 * N_BLOCK], unsigned char o_key[2 * N_BLOCK] ) |
| mluis | 0:91d1a7783bb9 | 815 | { |
| mluis | 0:91d1a7783bb9 | 816 | uint_8t s1[N_BLOCK], r, rc = 1; |
| mluis | 0:91d1a7783bb9 | 817 | if(o_key != key) |
| mluis | 0:91d1a7783bb9 | 818 | { |
| mluis | 0:91d1a7783bb9 | 819 | block_copy( o_key, key ); |
| mluis | 0:91d1a7783bb9 | 820 | block_copy( o_key + 16, key + 16 ); |
| mluis | 0:91d1a7783bb9 | 821 | } |
| mluis | 0:91d1a7783bb9 | 822 | copy_and_key( s1, in, o_key ); |
| mluis | 0:91d1a7783bb9 | 823 | |
| mluis | 0:91d1a7783bb9 | 824 | for( r = 1 ; r < 14 ; ++r ) |
| mluis | 0:91d1a7783bb9 | 825 | #if defined( VERSION_1 ) |
| mluis | 0:91d1a7783bb9 | 826 | { |
| mluis | 0:91d1a7783bb9 | 827 | mix_sub_columns(s1); |
| mluis | 0:91d1a7783bb9 | 828 | if( r & 1 ) |
| mluis | 0:91d1a7783bb9 | 829 | add_round_key( s1, o_key + 16 ); |
| mluis | 0:91d1a7783bb9 | 830 | else |
| mluis | 0:91d1a7783bb9 | 831 | { |
| mluis | 0:91d1a7783bb9 | 832 | update_encrypt_key_256( o_key, &rc ); |
| mluis | 0:91d1a7783bb9 | 833 | add_round_key( s1, o_key ); |
| mluis | 0:91d1a7783bb9 | 834 | } |
| mluis | 0:91d1a7783bb9 | 835 | } |
| mluis | 0:91d1a7783bb9 | 836 | #else |
| mluis | 0:91d1a7783bb9 | 837 | { uint_8t s2[N_BLOCK]; |
| mluis | 0:91d1a7783bb9 | 838 | mix_sub_columns( s2, s1 ); |
| mluis | 0:91d1a7783bb9 | 839 | if( r & 1 ) |
| mluis | 0:91d1a7783bb9 | 840 | copy_and_key( s1, s2, o_key + 16 ); |
| mluis | 0:91d1a7783bb9 | 841 | else |
| mluis | 0:91d1a7783bb9 | 842 | { |
| mluis | 0:91d1a7783bb9 | 843 | update_encrypt_key_256( o_key, &rc ); |
| mluis | 0:91d1a7783bb9 | 844 | copy_and_key( s1, s2, o_key ); |
| mluis | 0:91d1a7783bb9 | 845 | } |
| mluis | 0:91d1a7783bb9 | 846 | } |
| mluis | 0:91d1a7783bb9 | 847 | #endif |
| mluis | 0:91d1a7783bb9 | 848 | |
| mluis | 0:91d1a7783bb9 | 849 | shift_sub_rows( s1 ); |
| mluis | 0:91d1a7783bb9 | 850 | update_encrypt_key_256( o_key, &rc ); |
| mluis | 0:91d1a7783bb9 | 851 | copy_and_key( out, s1, o_key ); |
| mluis | 0:91d1a7783bb9 | 852 | } |
| mluis | 0:91d1a7783bb9 | 853 | |
| mluis | 0:91d1a7783bb9 | 854 | #endif |
| mluis | 0:91d1a7783bb9 | 855 | |
| mluis | 0:91d1a7783bb9 | 856 | #if defined( AES_DEC_256_OTFK ) |
| mluis | 0:91d1a7783bb9 | 857 | |
| mluis | 0:91d1a7783bb9 | 858 | /* The 'on the fly' encryption key update for for 256 bit keys */ |
| mluis | 0:91d1a7783bb9 | 859 | |
| mluis | 0:91d1a7783bb9 | 860 | static void update_decrypt_key_256( uint_8t k[2 * N_BLOCK], uint_8t *rc ) |
| mluis | 0:91d1a7783bb9 | 861 | { uint_8t cc; |
| mluis | 0:91d1a7783bb9 | 862 | |
| mluis | 0:91d1a7783bb9 | 863 | for(cc = 28; cc > 16; cc -= 4) |
| mluis | 0:91d1a7783bb9 | 864 | { |
| mluis | 0:91d1a7783bb9 | 865 | k[cc + 0] ^= k[cc - 4]; |
| mluis | 0:91d1a7783bb9 | 866 | k[cc + 1] ^= k[cc - 3]; |
| mluis | 0:91d1a7783bb9 | 867 | k[cc + 2] ^= k[cc - 2]; |
| mluis | 0:91d1a7783bb9 | 868 | k[cc + 3] ^= k[cc - 1]; |
| mluis | 0:91d1a7783bb9 | 869 | } |
| mluis | 0:91d1a7783bb9 | 870 | |
| mluis | 0:91d1a7783bb9 | 871 | k[16] ^= s_box(k[12]); |
| mluis | 0:91d1a7783bb9 | 872 | k[17] ^= s_box(k[13]); |
| mluis | 0:91d1a7783bb9 | 873 | k[18] ^= s_box(k[14]); |
| mluis | 0:91d1a7783bb9 | 874 | k[19] ^= s_box(k[15]); |
| mluis | 0:91d1a7783bb9 | 875 | |
| mluis | 0:91d1a7783bb9 | 876 | for(cc = 12; cc > 0; cc -= 4) |
| mluis | 0:91d1a7783bb9 | 877 | { |
| mluis | 0:91d1a7783bb9 | 878 | k[cc + 0] ^= k[cc - 4]; |
| mluis | 0:91d1a7783bb9 | 879 | k[cc + 1] ^= k[cc - 3]; |
| mluis | 0:91d1a7783bb9 | 880 | k[cc + 2] ^= k[cc - 2]; |
| mluis | 0:91d1a7783bb9 | 881 | k[cc + 3] ^= k[cc - 1]; |
| mluis | 0:91d1a7783bb9 | 882 | } |
| mluis | 0:91d1a7783bb9 | 883 | |
| mluis | 0:91d1a7783bb9 | 884 | *rc = d2(*rc); |
| mluis | 0:91d1a7783bb9 | 885 | k[0] ^= s_box(k[29]) ^ *rc; |
| mluis | 0:91d1a7783bb9 | 886 | k[1] ^= s_box(k[30]); |
| mluis | 0:91d1a7783bb9 | 887 | k[2] ^= s_box(k[31]); |
| mluis | 0:91d1a7783bb9 | 888 | k[3] ^= s_box(k[28]); |
| mluis | 0:91d1a7783bb9 | 889 | } |
| mluis | 0:91d1a7783bb9 | 890 | |
| mluis | 0:91d1a7783bb9 | 891 | /* Decrypt a single block of 16 bytes with 'on the fly' |
| mluis | 0:91d1a7783bb9 | 892 | 256 bit keying |
| mluis | 0:91d1a7783bb9 | 893 | */ |
| mluis | 0:91d1a7783bb9 | 894 | void aes_decrypt_256( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK], |
| mluis | 0:91d1a7783bb9 | 895 | const unsigned char key[2 * N_BLOCK], unsigned char o_key[2 * N_BLOCK] ) |
| mluis | 0:91d1a7783bb9 | 896 | { |
| mluis | 0:91d1a7783bb9 | 897 | uint_8t s1[N_BLOCK], r, rc = 0x80; |
| mluis | 0:91d1a7783bb9 | 898 | |
| mluis | 0:91d1a7783bb9 | 899 | if(o_key != key) |
| mluis | 0:91d1a7783bb9 | 900 | { |
| mluis | 0:91d1a7783bb9 | 901 | block_copy( o_key, key ); |
| mluis | 0:91d1a7783bb9 | 902 | block_copy( o_key + 16, key + 16 ); |
| mluis | 0:91d1a7783bb9 | 903 | } |
| mluis | 0:91d1a7783bb9 | 904 | |
| mluis | 0:91d1a7783bb9 | 905 | copy_and_key( s1, in, o_key ); |
| mluis | 0:91d1a7783bb9 | 906 | inv_shift_sub_rows( s1 ); |
| mluis | 0:91d1a7783bb9 | 907 | |
| mluis | 0:91d1a7783bb9 | 908 | for( r = 14 ; --r ; ) |
| mluis | 0:91d1a7783bb9 | 909 | #if defined( VERSION_1 ) |
| mluis | 0:91d1a7783bb9 | 910 | { |
| mluis | 0:91d1a7783bb9 | 911 | if( ( r & 1 ) ) |
| mluis | 0:91d1a7783bb9 | 912 | { |
| mluis | 0:91d1a7783bb9 | 913 | update_decrypt_key_256( o_key, &rc ); |
| mluis | 0:91d1a7783bb9 | 914 | add_round_key( s1, o_key + 16 ); |
| mluis | 0:91d1a7783bb9 | 915 | } |
| mluis | 0:91d1a7783bb9 | 916 | else |
| mluis | 0:91d1a7783bb9 | 917 | add_round_key( s1, o_key ); |
| mluis | 0:91d1a7783bb9 | 918 | inv_mix_sub_columns( s1 ); |
| mluis | 0:91d1a7783bb9 | 919 | } |
| mluis | 0:91d1a7783bb9 | 920 | #else |
| mluis | 0:91d1a7783bb9 | 921 | { uint_8t s2[N_BLOCK]; |
| mluis | 0:91d1a7783bb9 | 922 | if( ( r & 1 ) ) |
| mluis | 0:91d1a7783bb9 | 923 | { |
| mluis | 0:91d1a7783bb9 | 924 | update_decrypt_key_256( o_key, &rc ); |
| mluis | 0:91d1a7783bb9 | 925 | copy_and_key( s2, s1, o_key + 16 ); |
| mluis | 0:91d1a7783bb9 | 926 | } |
| mluis | 0:91d1a7783bb9 | 927 | else |
| mluis | 0:91d1a7783bb9 | 928 | copy_and_key( s2, s1, o_key ); |
| mluis | 0:91d1a7783bb9 | 929 | inv_mix_sub_columns( s1, s2 ); |
| mluis | 0:91d1a7783bb9 | 930 | } |
| mluis | 0:91d1a7783bb9 | 931 | #endif |
| mluis | 0:91d1a7783bb9 | 932 | copy_and_key( out, s1, o_key ); |
| mluis | 0:91d1a7783bb9 | 933 | } |
| mluis | 0:91d1a7783bb9 | 934 | |
| mluis | 0:91d1a7783bb9 | 935 | #endif |