Heroic Robotics / cc3000_hostdriver_mbedsocket

cc3000 driver with expanded buffers.

Fork of cc3000_hostdriver_mbedsocket by Martin Kojtal

cc3000_security.cpp@0:615c697c33b0, 2013-09-19 (annotated)

Committer:
Kojto
Date:
Thu Sep 19 07:55:14 2013 +0000
Revision:
0:615c697c33b0
Child:
45:50ab13d8f2dc
initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Kojto 0:615c697c33b0 1 /*****************************************************************************
Kojto 0:615c697c33b0 2 *
Kojto 0:615c697c33b0 3 * C++ interface/implementation created by Martin Kojtal (0xc0170). Thanks to
Kojto 0:615c697c33b0 4 * Jim Carver and Frank Vannieuwkerke for their inital cc3000 mbed port and
Kojto 0:615c697c33b0 5 * provided help.
Kojto 0:615c697c33b0 6 *
Kojto 0:615c697c33b0 7 * This version of "host driver" uses CC3000 Host Driver Implementation. Thus
Kojto 0:615c697c33b0 8 * read the following copyright:
Kojto 0:615c697c33b0 9 *
Kojto 0:615c697c33b0 10 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
Kojto 0:615c697c33b0 11 *
Kojto 0:615c697c33b0 12 * Redistribution and use in source and binary forms, with or without
Kojto 0:615c697c33b0 13 * modification, are permitted provided that the following conditions
Kojto 0:615c697c33b0 14 * are met:
Kojto 0:615c697c33b0 15 *
Kojto 0:615c697c33b0 16 * Redistributions of source code must retain the above copyright
Kojto 0:615c697c33b0 17 * notice, this list of conditions and the following disclaimer.
Kojto 0:615c697c33b0 18 *
Kojto 0:615c697c33b0 19 * Redistributions in binary form must reproduce the above copyright
Kojto 0:615c697c33b0 20 * notice, this list of conditions and the following disclaimer in the
Kojto 0:615c697c33b0 21 * documentation and/or other materials provided with the
Kojto 0:615c697c33b0 22 * distribution.
Kojto 0:615c697c33b0 23 *
Kojto 0:615c697c33b0 24 * Neither the name of Texas Instruments Incorporated nor the names of
Kojto 0:615c697c33b0 25 * its contributors may be used to endorse or promote products derived
Kojto 0:615c697c33b0 26 * from this software without specific prior written permission.
Kojto 0:615c697c33b0 27 *
Kojto 0:615c697c33b0 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
Kojto 0:615c697c33b0 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
Kojto 0:615c697c33b0 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
Kojto 0:615c697c33b0 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
Kojto 0:615c697c33b0 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
Kojto 0:615c697c33b0 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
Kojto 0:615c697c33b0 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
Kojto 0:615c697c33b0 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
Kojto 0:615c697c33b0 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
Kojto 0:615c697c33b0 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
Kojto 0:615c697c33b0 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Kojto 0:615c697c33b0 39 *
Kojto 0:615c697c33b0 40 *****************************************************************************/
Kojto 0:615c697c33b0 41 #include "cc3000.h"
Kojto 0:615c697c33b0 42
Kojto 0:615c697c33b0 43 namespace mbed_cc3000 {
Kojto 0:615c697c33b0 44
Kojto 0:615c697c33b0 45 #ifndef CC3000_UNENCRYPTED_SMART_CONFIG
Kojto 0:615c697c33b0 46
Kojto 0:615c697c33b0 47 // forward sbox
Kojto 0:615c697c33b0 48 static const uint8_t sbox[256] = {
Kojto 0:615c697c33b0 49 //0 1 2 3 4 5 6 7 8 9 A B C D E F
Kojto 0:615c697c33b0 50 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, //0
Kojto 0:615c697c33b0 51 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, //1
Kojto 0:615c697c33b0 52 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, //2
Kojto 0:615c697c33b0 53 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, //3
Kojto 0:615c697c33b0 54 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, //4
Kojto 0:615c697c33b0 55 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, //5
Kojto 0:615c697c33b0 56 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, //6
Kojto 0:615c697c33b0 57 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, //7
Kojto 0:615c697c33b0 58 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, //8
Kojto 0:615c697c33b0 59 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, //9
Kojto 0:615c697c33b0 60 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, //A
Kojto 0:615c697c33b0 61 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, //B
Kojto 0:615c697c33b0 62 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, //C
Kojto 0:615c697c33b0 63 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, //D
Kojto 0:615c697c33b0 64 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, //E
Kojto 0:615c697c33b0 65 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 }; //F
Kojto 0:615c697c33b0 66 // inverse sbox
Kojto 0:615c697c33b0 67 static const uint8_t rsbox[256] =
Kojto 0:615c697c33b0 68 { 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb
Kojto 0:615c697c33b0 69 , 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb
Kojto 0:615c697c33b0 70 , 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e
Kojto 0:615c697c33b0 71 , 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25
Kojto 0:615c697c33b0 72 , 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92
Kojto 0:615c697c33b0 73 , 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84
Kojto 0:615c697c33b0 74 , 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06
Kojto 0:615c697c33b0 75 , 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b
Kojto 0:615c697c33b0 76 , 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73
Kojto 0:615c697c33b0 77 , 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e
Kojto 0:615c697c33b0 78 , 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b
Kojto 0:615c697c33b0 79 , 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4
Kojto 0:615c697c33b0 80 , 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f
Kojto 0:615c697c33b0 81 , 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef
Kojto 0:615c697c33b0 82 , 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61
Kojto 0:615c697c33b0 83 , 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d };
Kojto 0:615c697c33b0 84 // round constant
Kojto 0:615c697c33b0 85 static const uint8_t Rcon[11] = {0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36};
Kojto 0:615c697c33b0 86
Kojto 0:615c697c33b0 87 void cc3000_security::expandKey(uint8_t *expanded_key, uint8_t *key) {
Kojto 0:615c697c33b0 88 uint16_t ii, buf1;
Kojto 0:615c697c33b0 89 for (ii=0;ii<16;ii++)
Kojto 0:615c697c33b0 90 expanded_key[ii] = key[ii];
Kojto 0:615c697c33b0 91 for (ii=1;ii<11;ii++)
Kojto 0:615c697c33b0 92 {
Kojto 0:615c697c33b0 93 buf1 = expanded_key[ii*16 - 4];
Kojto 0:615c697c33b0 94 expanded_key[ii*16 + 0] = sbox[expanded_key[ii*16 - 3]]^expanded_key[(ii-1)*16 + 0]^Rcon[ii];
Kojto 0:615c697c33b0 95 expanded_key[ii*16 + 1] = sbox[expanded_key[ii*16 - 2]]^expanded_key[(ii-1)*16 + 1];
Kojto 0:615c697c33b0 96 expanded_key[ii*16 + 2] = sbox[expanded_key[ii*16 - 1]]^expanded_key[(ii-1)*16 + 2];
Kojto 0:615c697c33b0 97 expanded_key[ii*16 + 3] = sbox[buf1 ]^expanded_key[(ii-1)*16 + 3];
Kojto 0:615c697c33b0 98 expanded_key[ii*16 + 4] = expanded_key[(ii-1)*16 + 4]^expanded_key[ii*16 + 0];
Kojto 0:615c697c33b0 99 expanded_key[ii*16 + 5] = expanded_key[(ii-1)*16 + 5]^expanded_key[ii*16 + 1];
Kojto 0:615c697c33b0 100 expanded_key[ii*16 + 6] = expanded_key[(ii-1)*16 + 6]^expanded_key[ii*16 + 2];
Kojto 0:615c697c33b0 101 expanded_key[ii*16 + 7] = expanded_key[(ii-1)*16 + 7]^expanded_key[ii*16 + 3];
Kojto 0:615c697c33b0 102 expanded_key[ii*16 + 8] = expanded_key[(ii-1)*16 + 8]^expanded_key[ii*16 + 4];
Kojto 0:615c697c33b0 103 expanded_key[ii*16 + 9] = expanded_key[(ii-1)*16 + 9]^expanded_key[ii*16 + 5];
Kojto 0:615c697c33b0 104 expanded_key[ii*16 +10] = expanded_key[(ii-1)*16 +10]^expanded_key[ii*16 + 6];
Kojto 0:615c697c33b0 105 expanded_key[ii*16 +11] = expanded_key[(ii-1)*16 +11]^expanded_key[ii*16 + 7];
Kojto 0:615c697c33b0 106 expanded_key[ii*16 +12] = expanded_key[(ii-1)*16 +12]^expanded_key[ii*16 + 8];
Kojto 0:615c697c33b0 107 expanded_key[ii*16 +13] = expanded_key[(ii-1)*16 +13]^expanded_key[ii*16 + 9];
Kojto 0:615c697c33b0 108 expanded_key[ii*16 +14] = expanded_key[(ii-1)*16 +14]^expanded_key[ii*16 +10];
Kojto 0:615c697c33b0 109 expanded_key[ii*16 +15] = expanded_key[(ii-1)*16 +15]^expanded_key[ii*16 +11];
Kojto 0:615c697c33b0 110 }
Kojto 0:615c697c33b0 111 }
Kojto 0:615c697c33b0 112
Kojto 0:615c697c33b0 113 uint8_t cc3000_security::galois_mul2(uint8_t value) {
Kojto 0:615c697c33b0 114 if (value >> 7) {
Kojto 0:615c697c33b0 115 value = value << 1;
Kojto 0:615c697c33b0 116 return (value ^ 0x1b);
Kojto 0:615c697c33b0 117 } else {
Kojto 0:615c697c33b0 118 return (value << 1);
Kojto 0:615c697c33b0 119 }
Kojto 0:615c697c33b0 120 }
Kojto 0:615c697c33b0 121
Kojto 0:615c697c33b0 122 void cc3000_security::aes_encr(uint8_t *state, uint8_t *expanded_key) {
Kojto 0:615c697c33b0 123 uint8_t buf1, buf2, buf3, round;
Kojto 0:615c697c33b0 124
Kojto 0:615c697c33b0 125 for (round = 0; round < 9; round ++)
Kojto 0:615c697c33b0 126 {
Kojto 0:615c697c33b0 127 // addroundkey, sbox and shiftrows
Kojto 0:615c697c33b0 128 // row 0
Kojto 0:615c697c33b0 129 state[ 0] = sbox[(state[ 0] ^ expanded_key[(round*16) ])];
Kojto 0:615c697c33b0 130 state[ 4] = sbox[(state[ 4] ^ expanded_key[(round*16) + 4])];
Kojto 0:615c697c33b0 131 state[ 8] = sbox[(state[ 8] ^ expanded_key[(round*16) + 8])];
Kojto 0:615c697c33b0 132 state[12] = sbox[(state[12] ^ expanded_key[(round*16) + 12])];
Kojto 0:615c697c33b0 133 // row 1
Kojto 0:615c697c33b0 134 buf1 = state[1] ^ expanded_key[(round*16) + 1];
Kojto 0:615c697c33b0 135 state[ 1] = sbox[(state[ 5] ^ expanded_key[(round*16) + 5])];
Kojto 0:615c697c33b0 136 state[ 5] = sbox[(state[ 9] ^ expanded_key[(round*16) + 9])];
Kojto 0:615c697c33b0 137 state[ 9] = sbox[(state[13] ^ expanded_key[(round*16) + 13])];
Kojto 0:615c697c33b0 138 state[13] = sbox[buf1];
Kojto 0:615c697c33b0 139 // row 2
Kojto 0:615c697c33b0 140 buf1 = state[2] ^ expanded_key[(round*16) + 2];
Kojto 0:615c697c33b0 141 buf2 = state[6] ^ expanded_key[(round*16) + 6];
Kojto 0:615c697c33b0 142 state[ 2] = sbox[(state[10] ^ expanded_key[(round*16) + 10])];
Kojto 0:615c697c33b0 143 state[ 6] = sbox[(state[14] ^ expanded_key[(round*16) + 14])];
Kojto 0:615c697c33b0 144 state[10] = sbox[buf1];
Kojto 0:615c697c33b0 145 state[14] = sbox[buf2];
Kojto 0:615c697c33b0 146 // row 3
Kojto 0:615c697c33b0 147 buf1 = state[15] ^ expanded_key[(round*16) + 15];
Kojto 0:615c697c33b0 148 state[15] = sbox[(state[11] ^ expanded_key[(round*16) + 11])];
Kojto 0:615c697c33b0 149 state[11] = sbox[(state[ 7] ^ expanded_key[(round*16) + 7])];
Kojto 0:615c697c33b0 150 state[ 7] = sbox[(state[ 3] ^ expanded_key[(round*16) + 3])];
Kojto 0:615c697c33b0 151 state[ 3] = sbox[buf1];
Kojto 0:615c697c33b0 152
Kojto 0:615c697c33b0 153 // mixcolums //////////
Kojto 0:615c697c33b0 154 // col1
Kojto 0:615c697c33b0 155 buf1 = state[0] ^ state[1] ^ state[2] ^ state[3];
Kojto 0:615c697c33b0 156 buf2 = state[0];
Kojto 0:615c697c33b0 157 buf3 = state[0]^state[1]; buf3=galois_mul2(buf3); state[0] = state[0] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 158 buf3 = state[1]^state[2]; buf3=galois_mul2(buf3); state[1] = state[1] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 159 buf3 = state[2]^state[3]; buf3=galois_mul2(buf3); state[2] = state[2] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 160 buf3 = state[3]^buf2; buf3=galois_mul2(buf3); state[3] = state[3] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 161 // col2
Kojto 0:615c697c33b0 162 buf1 = state[4] ^ state[5] ^ state[6] ^ state[7];
Kojto 0:615c697c33b0 163 buf2 = state[4];
Kojto 0:615c697c33b0 164 buf3 = state[4]^state[5]; buf3=galois_mul2(buf3); state[4] = state[4] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 165 buf3 = state[5]^state[6]; buf3=galois_mul2(buf3); state[5] = state[5] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 166 buf3 = state[6]^state[7]; buf3=galois_mul2(buf3); state[6] = state[6] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 167 buf3 = state[7]^buf2; buf3=galois_mul2(buf3); state[7] = state[7] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 168 // col3
Kojto 0:615c697c33b0 169 buf1 = state[8] ^ state[9] ^ state[10] ^ state[11];
Kojto 0:615c697c33b0 170 buf2 = state[8];
Kojto 0:615c697c33b0 171 buf3 = state[8]^state[9]; buf3=galois_mul2(buf3); state[8] = state[8] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 172 buf3 = state[9]^state[10]; buf3=galois_mul2(buf3); state[9] = state[9] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 173 buf3 = state[10]^state[11]; buf3=galois_mul2(buf3); state[10] = state[10] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 174 buf3 = state[11]^buf2; buf3=galois_mul2(buf3); state[11] = state[11] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 175 // col4
Kojto 0:615c697c33b0 176 buf1 = state[12] ^ state[13] ^ state[14] ^ state[15];
Kojto 0:615c697c33b0 177 buf2 = state[12];
Kojto 0:615c697c33b0 178 buf3 = state[12]^state[13]; buf3=galois_mul2(buf3); state[12] = state[12] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 179 buf3 = state[13]^state[14]; buf3=galois_mul2(buf3); state[13] = state[13] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 180 buf3 = state[14]^state[15]; buf3=galois_mul2(buf3); state[14] = state[14] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 181 buf3 = state[15]^buf2; buf3=galois_mul2(buf3); state[15] = state[15] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 182
Kojto 0:615c697c33b0 183 }
Kojto 0:615c697c33b0 184 // 10th round without mixcols
Kojto 0:615c697c33b0 185 state[ 0] = sbox[(state[ 0] ^ expanded_key[(round*16) ])];
Kojto 0:615c697c33b0 186 state[ 4] = sbox[(state[ 4] ^ expanded_key[(round*16) + 4])];
Kojto 0:615c697c33b0 187 state[ 8] = sbox[(state[ 8] ^ expanded_key[(round*16) + 8])];
Kojto 0:615c697c33b0 188 state[12] = sbox[(state[12] ^ expanded_key[(round*16) + 12])];
Kojto 0:615c697c33b0 189 // row 1
Kojto 0:615c697c33b0 190 buf1 = state[1] ^ expanded_key[(round*16) + 1];
Kojto 0:615c697c33b0 191 state[ 1] = sbox[(state[ 5] ^ expanded_key[(round*16) + 5])];
Kojto 0:615c697c33b0 192 state[ 5] = sbox[(state[ 9] ^ expanded_key[(round*16) + 9])];
Kojto 0:615c697c33b0 193 state[ 9] = sbox[(state[13] ^ expanded_key[(round*16) + 13])];
Kojto 0:615c697c33b0 194 state[13] = sbox[buf1];
Kojto 0:615c697c33b0 195 // row 2
Kojto 0:615c697c33b0 196 buf1 = state[2] ^ expanded_key[(round*16) + 2];
Kojto 0:615c697c33b0 197 buf2 = state[6] ^ expanded_key[(round*16) + 6];
Kojto 0:615c697c33b0 198 state[ 2] = sbox[(state[10] ^ expanded_key[(round*16) + 10])];
Kojto 0:615c697c33b0 199 state[ 6] = sbox[(state[14] ^ expanded_key[(round*16) + 14])];
Kojto 0:615c697c33b0 200 state[10] = sbox[buf1];
Kojto 0:615c697c33b0 201 state[14] = sbox[buf2];
Kojto 0:615c697c33b0 202 // row 3
Kojto 0:615c697c33b0 203 buf1 = state[15] ^ expanded_key[(round*16) + 15];
Kojto 0:615c697c33b0 204 state[15] = sbox[(state[11] ^ expanded_key[(round*16) + 11])];
Kojto 0:615c697c33b0 205 state[11] = sbox[(state[ 7] ^ expanded_key[(round*16) + 7])];
Kojto 0:615c697c33b0 206 state[ 7] = sbox[(state[ 3] ^ expanded_key[(round*16) + 3])];
Kojto 0:615c697c33b0 207 state[ 3] = sbox[buf1];
Kojto 0:615c697c33b0 208 // last addroundkey
Kojto 0:615c697c33b0 209 state[ 0]^=expanded_key[160];
Kojto 0:615c697c33b0 210 state[ 1]^=expanded_key[161];
Kojto 0:615c697c33b0 211 state[ 2]^=expanded_key[162];
Kojto 0:615c697c33b0 212 state[ 3]^=expanded_key[163];
Kojto 0:615c697c33b0 213 state[ 4]^=expanded_key[164];
Kojto 0:615c697c33b0 214 state[ 5]^=expanded_key[165];
Kojto 0:615c697c33b0 215 state[ 6]^=expanded_key[166];
Kojto 0:615c697c33b0 216 state[ 7]^=expanded_key[167];
Kojto 0:615c697c33b0 217 state[ 8]^=expanded_key[168];
Kojto 0:615c697c33b0 218 state[ 9]^=expanded_key[169];
Kojto 0:615c697c33b0 219 state[10]^=expanded_key[170];
Kojto 0:615c697c33b0 220 state[11]^=expanded_key[171];
Kojto 0:615c697c33b0 221 state[12]^=expanded_key[172];
Kojto 0:615c697c33b0 222 state[13]^=expanded_key[173];
Kojto 0:615c697c33b0 223 state[14]^=expanded_key[174];
Kojto 0:615c697c33b0 224 state[15]^=expanded_key[175];
Kojto 0:615c697c33b0 225 }
Kojto 0:615c697c33b0 226
Kojto 0:615c697c33b0 227 void cc3000_security::aes_decr(uint8_t *state, uint8_t *expanded_key) {
Kojto 0:615c697c33b0 228 uint8_t buf1, buf2, buf3;
Kojto 0:615c697c33b0 229 int8_t round;
Kojto 0:615c697c33b0 230 round = 9;
Kojto 0:615c697c33b0 231
Kojto 0:615c697c33b0 232 // initial addroundkey
Kojto 0:615c697c33b0 233 state[ 0]^=expanded_key[160];
Kojto 0:615c697c33b0 234 state[ 1]^=expanded_key[161];
Kojto 0:615c697c33b0 235 state[ 2]^=expanded_key[162];
Kojto 0:615c697c33b0 236 state[ 3]^=expanded_key[163];
Kojto 0:615c697c33b0 237 state[ 4]^=expanded_key[164];
Kojto 0:615c697c33b0 238 state[ 5]^=expanded_key[165];
Kojto 0:615c697c33b0 239 state[ 6]^=expanded_key[166];
Kojto 0:615c697c33b0 240 state[ 7]^=expanded_key[167];
Kojto 0:615c697c33b0 241 state[ 8]^=expanded_key[168];
Kojto 0:615c697c33b0 242 state[ 9]^=expanded_key[169];
Kojto 0:615c697c33b0 243 state[10]^=expanded_key[170];
Kojto 0:615c697c33b0 244 state[11]^=expanded_key[171];
Kojto 0:615c697c33b0 245 state[12]^=expanded_key[172];
Kojto 0:615c697c33b0 246 state[13]^=expanded_key[173];
Kojto 0:615c697c33b0 247 state[14]^=expanded_key[174];
Kojto 0:615c697c33b0 248 state[15]^=expanded_key[175];
Kojto 0:615c697c33b0 249
Kojto 0:615c697c33b0 250 // 10th round without mixcols
Kojto 0:615c697c33b0 251 state[ 0] = rsbox[state[ 0]] ^ expanded_key[(round*16) ];
Kojto 0:615c697c33b0 252 state[ 4] = rsbox[state[ 4]] ^ expanded_key[(round*16) + 4];
Kojto 0:615c697c33b0 253 state[ 8] = rsbox[state[ 8]] ^ expanded_key[(round*16) + 8];
Kojto 0:615c697c33b0 254 state[12] = rsbox[state[12]] ^ expanded_key[(round*16) + 12];
Kojto 0:615c697c33b0 255 // row 1
Kojto 0:615c697c33b0 256 buf1 = rsbox[state[13]] ^ expanded_key[(round*16) + 1];
Kojto 0:615c697c33b0 257 state[13] = rsbox[state[ 9]] ^ expanded_key[(round*16) + 13];
Kojto 0:615c697c33b0 258 state[ 9] = rsbox[state[ 5]] ^ expanded_key[(round*16) + 9];
Kojto 0:615c697c33b0 259 state[ 5] = rsbox[state[ 1]] ^ expanded_key[(round*16) + 5];
Kojto 0:615c697c33b0 260 state[ 1] = buf1;
Kojto 0:615c697c33b0 261 // row 2
Kojto 0:615c697c33b0 262 buf1 = rsbox[state[ 2]] ^ expanded_key[(round*16) + 10];
Kojto 0:615c697c33b0 263 buf2 = rsbox[state[ 6]] ^ expanded_key[(round*16) + 14];
Kojto 0:615c697c33b0 264 state[ 2] = rsbox[state[10]] ^ expanded_key[(round*16) + 2];
Kojto 0:615c697c33b0 265 state[ 6] = rsbox[state[14]] ^ expanded_key[(round*16) + 6];
Kojto 0:615c697c33b0 266 state[10] = buf1;
Kojto 0:615c697c33b0 267 state[14] = buf2;
Kojto 0:615c697c33b0 268 // row 3
Kojto 0:615c697c33b0 269 buf1 = rsbox[state[ 3]] ^ expanded_key[(round*16) + 15];
Kojto 0:615c697c33b0 270 state[ 3] = rsbox[state[ 7]] ^ expanded_key[(round*16) + 3];
Kojto 0:615c697c33b0 271 state[ 7] = rsbox[state[11]] ^ expanded_key[(round*16) + 7];
Kojto 0:615c697c33b0 272 state[11] = rsbox[state[15]] ^ expanded_key[(round*16) + 11];
Kojto 0:615c697c33b0 273 state[15] = buf1;
Kojto 0:615c697c33b0 274
Kojto 0:615c697c33b0 275 for (round = 8; round >= 0; round--)
Kojto 0:615c697c33b0 276 {
Kojto 0:615c697c33b0 277 // barreto
Kojto 0:615c697c33b0 278 //col1
Kojto 0:615c697c33b0 279 buf1 = galois_mul2(galois_mul2(state[0]^state[2]));
Kojto 0:615c697c33b0 280 buf2 = galois_mul2(galois_mul2(state[1]^state[3]));
Kojto 0:615c697c33b0 281 state[0] ^= buf1; state[1] ^= buf2; state[2] ^= buf1; state[3] ^= buf2;
Kojto 0:615c697c33b0 282 //col2
Kojto 0:615c697c33b0 283 buf1 = galois_mul2(galois_mul2(state[4]^state[6]));
Kojto 0:615c697c33b0 284 buf2 = galois_mul2(galois_mul2(state[5]^state[7]));
Kojto 0:615c697c33b0 285 state[4] ^= buf1; state[5] ^= buf2; state[6] ^= buf1; state[7] ^= buf2;
Kojto 0:615c697c33b0 286 //col3
Kojto 0:615c697c33b0 287 buf1 = galois_mul2(galois_mul2(state[8]^state[10]));
Kojto 0:615c697c33b0 288 buf2 = galois_mul2(galois_mul2(state[9]^state[11]));
Kojto 0:615c697c33b0 289 state[8] ^= buf1; state[9] ^= buf2; state[10] ^= buf1; state[11] ^= buf2;
Kojto 0:615c697c33b0 290 //col4
Kojto 0:615c697c33b0 291 buf1 = galois_mul2(galois_mul2(state[12]^state[14]));
Kojto 0:615c697c33b0 292 buf2 = galois_mul2(galois_mul2(state[13]^state[15]));
Kojto 0:615c697c33b0 293 state[12] ^= buf1; state[13] ^= buf2; state[14] ^= buf1; state[15] ^= buf2;
Kojto 0:615c697c33b0 294 // mixcolums //////////
Kojto 0:615c697c33b0 295 // col1
Kojto 0:615c697c33b0 296 buf1 = state[0] ^ state[1] ^ state[2] ^ state[3];
Kojto 0:615c697c33b0 297 buf2 = state[0];
Kojto 0:615c697c33b0 298 buf3 = state[0]^state[1]; buf3=galois_mul2(buf3); state[0] = state[0] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 299 buf3 = state[1]^state[2]; buf3=galois_mul2(buf3); state[1] = state[1] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 300 buf3 = state[2]^state[3]; buf3=galois_mul2(buf3); state[2] = state[2] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 301 buf3 = state[3]^buf2; buf3=galois_mul2(buf3); state[3] = state[3] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 302 // col2
Kojto 0:615c697c33b0 303 buf1 = state[4] ^ state[5] ^ state[6] ^ state[7];
Kojto 0:615c697c33b0 304 buf2 = state[4];
Kojto 0:615c697c33b0 305 buf3 = state[4]^state[5]; buf3=galois_mul2(buf3); state[4] = state[4] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 306 buf3 = state[5]^state[6]; buf3=galois_mul2(buf3); state[5] = state[5] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 307 buf3 = state[6]^state[7]; buf3=galois_mul2(buf3); state[6] = state[6] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 308 buf3 = state[7]^buf2; buf3=galois_mul2(buf3); state[7] = state[7] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 309 // col3
Kojto 0:615c697c33b0 310 buf1 = state[8] ^ state[9] ^ state[10] ^ state[11];
Kojto 0:615c697c33b0 311 buf2 = state[8];
Kojto 0:615c697c33b0 312 buf3 = state[8]^state[9]; buf3=galois_mul2(buf3); state[8] = state[8] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 313 buf3 = state[9]^state[10]; buf3=galois_mul2(buf3); state[9] = state[9] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 314 buf3 = state[10]^state[11]; buf3=galois_mul2(buf3); state[10] = state[10] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 315 buf3 = state[11]^buf2; buf3=galois_mul2(buf3); state[11] = state[11] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 316 // col4
Kojto 0:615c697c33b0 317 buf1 = state[12] ^ state[13] ^ state[14] ^ state[15];
Kojto 0:615c697c33b0 318 buf2 = state[12];
Kojto 0:615c697c33b0 319 buf3 = state[12]^state[13]; buf3=galois_mul2(buf3); state[12] = state[12] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 320 buf3 = state[13]^state[14]; buf3=galois_mul2(buf3); state[13] = state[13] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 321 buf3 = state[14]^state[15]; buf3=galois_mul2(buf3); state[14] = state[14] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 322 buf3 = state[15]^buf2; buf3=galois_mul2(buf3); state[15] = state[15] ^ buf3 ^ buf1;
Kojto 0:615c697c33b0 323
Kojto 0:615c697c33b0 324 // addroundkey, rsbox and shiftrows
Kojto 0:615c697c33b0 325 // row 0
Kojto 0:615c697c33b0 326 state[ 0] = rsbox[state[ 0]] ^ expanded_key[(round*16) ];
Kojto 0:615c697c33b0 327 state[ 4] = rsbox[state[ 4]] ^ expanded_key[(round*16) + 4];
Kojto 0:615c697c33b0 328 state[ 8] = rsbox[state[ 8]] ^ expanded_key[(round*16) + 8];
Kojto 0:615c697c33b0 329 state[12] = rsbox[state[12]] ^ expanded_key[(round*16) + 12];
Kojto 0:615c697c33b0 330 // row 1
Kojto 0:615c697c33b0 331 buf1 = rsbox[state[13]] ^ expanded_key[(round*16) + 1];
Kojto 0:615c697c33b0 332 state[13] = rsbox[state[ 9]] ^ expanded_key[(round*16) + 13];
Kojto 0:615c697c33b0 333 state[ 9] = rsbox[state[ 5]] ^ expanded_key[(round*16) + 9];
Kojto 0:615c697c33b0 334 state[ 5] = rsbox[state[ 1]] ^ expanded_key[(round*16) + 5];
Kojto 0:615c697c33b0 335 state[ 1] = buf1;
Kojto 0:615c697c33b0 336 // row 2
Kojto 0:615c697c33b0 337 buf1 = rsbox[state[ 2]] ^ expanded_key[(round*16) + 10];
Kojto 0:615c697c33b0 338 buf2 = rsbox[state[ 6]] ^ expanded_key[(round*16) + 14];
Kojto 0:615c697c33b0 339 state[ 2] = rsbox[state[10]] ^ expanded_key[(round*16) + 2];
Kojto 0:615c697c33b0 340 state[ 6] = rsbox[state[14]] ^ expanded_key[(round*16) + 6];
Kojto 0:615c697c33b0 341 state[10] = buf1;
Kojto 0:615c697c33b0 342 state[14] = buf2;
Kojto 0:615c697c33b0 343 // row 3
Kojto 0:615c697c33b0 344 buf1 = rsbox[state[ 3]] ^ expanded_key[(round*16) + 15];
Kojto 0:615c697c33b0 345 state[ 3] = rsbox[state[ 7]] ^ expanded_key[(round*16) + 3];
Kojto 0:615c697c33b0 346 state[ 7] = rsbox[state[11]] ^ expanded_key[(round*16) + 7];
Kojto 0:615c697c33b0 347 state[11] = rsbox[state[15]] ^ expanded_key[(round*16) + 11];
Kojto 0:615c697c33b0 348 state[15] = buf1;
Kojto 0:615c697c33b0 349 }
Kojto 0:615c697c33b0 350 }
Kojto 0:615c697c33b0 351
Kojto 0:615c697c33b0 352 void cc3000_security::aes_encrypt(uint8_t *state, uint8_t *key) {
Kojto 0:615c697c33b0 353 // expand the key into 176 bytes
Kojto 0:615c697c33b0 354 expandKey(_expanded_key, key);
Kojto 0:615c697c33b0 355 aes_encr(state, _expanded_key);
Kojto 0:615c697c33b0 356 }
Kojto 0:615c697c33b0 357
Kojto 0:615c697c33b0 358 void cc3000_security::aes_decrypt(uint8_t *state, uint8_t *key) {
Kojto 0:615c697c33b0 359 expandKey(_expanded_key, key); // expand the key into 176 bytes
Kojto 0:615c697c33b0 360 aes_decr(state, _expanded_key);
Kojto 0:615c697c33b0 361 }
Kojto 0:615c697c33b0 362
Kojto 0:615c697c33b0 363 int32_t cc3000_security::aes_read_key(uint8_t *key) {
Kojto 0:615c697c33b0 364 int32_t returnValue;
Kojto 0:615c697c33b0 365
Kojto 0:615c697c33b0 366 returnValue = nvmem_read(NVMEM_AES128_KEY_FILEID, AES128_KEY_SIZE, 0, key);
Kojto 0:615c697c33b0 367
Kojto 0:615c697c33b0 368 return returnValue;
Kojto 0:615c697c33b0 369 }
Kojto 0:615c697c33b0 370
Kojto 0:615c697c33b0 371 int32_t cc3000_security::aes_write_key(uint8_t *key) {
Kojto 0:615c697c33b0 372 int32_t returnValue;
Kojto 0:615c697c33b0 373
Kojto 0:615c697c33b0 374 returnValue = nvmem_write(NVMEM_AES128_KEY_FILEID, AES128_KEY_SIZE, 0, key);
Kojto 0:615c697c33b0 375
Kojto 0:615c697c33b0 376 return returnValue;
Kojto 0:615c697c33b0 377 }
Kojto 0:615c697c33b0 378 #endif
Kojto 0:615c697c33b0 379
Kojto 0:615c697c33b0 380 } /* end of cc3000 namespace */
Kojto 0:615c697c33b0 381