David Fletcher / Mbed 2 deprecated CC3000WebServer

A Port of TI's Webserver for the CC3000

Dependencies:   mbed

CC3000HostDriver/security.cpp@2:e6a185df9e4c, 2013-09-16 (annotated)

Committer:
dflet
Date:
Mon Sep 16 18:37:14 2013 +0000
Revision:
2:e6a185df9e4c
Parent:
0:6ad60d78b315 
ADC and Leds now work on board and config.html page.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dflet 0:6ad60d78b315 1 /*****************************************************************************
dflet 0:6ad60d78b315 2 *
dflet 0:6ad60d78b315 3 * security.c - CC3000 Host Driver Implementation.
dflet 0:6ad60d78b315 4 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
dflet 0:6ad60d78b315 5 *
dflet 0:6ad60d78b315 6 * Redistribution and use in source and binary forms, with or without
dflet 0:6ad60d78b315 7 * modification, are permitted provided that the following conditions
dflet 0:6ad60d78b315 8 * are met:
dflet 0:6ad60d78b315 9 *
dflet 0:6ad60d78b315 10 * Redistributions of source code must retain the above copyright
dflet 0:6ad60d78b315 11 * notice, this list of conditions and the following disclaimer.
dflet 0:6ad60d78b315 12 *
dflet 0:6ad60d78b315 13 * Redistributions in binary form must reproduce the above copyright
dflet 0:6ad60d78b315 14 * notice, this list of conditions and the following disclaimer in the
dflet 0:6ad60d78b315 15 * documentation and/or other materials provided with the
dflet 0:6ad60d78b315 16 * distribution.
dflet 0:6ad60d78b315 17 *
dflet 0:6ad60d78b315 18 * Neither the name of Texas Instruments Incorporated nor the names of
dflet 0:6ad60d78b315 19 * its contributors may be used to endorse or promote products derived
dflet 0:6ad60d78b315 20 * from this software without specific prior written permission.
dflet 0:6ad60d78b315 21 *
dflet 0:6ad60d78b315 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
dflet 0:6ad60d78b315 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
dflet 0:6ad60d78b315 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
dflet 0:6ad60d78b315 25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
dflet 0:6ad60d78b315 26 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
dflet 0:6ad60d78b315 27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
dflet 0:6ad60d78b315 28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
dflet 0:6ad60d78b315 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
dflet 0:6ad60d78b315 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
dflet 0:6ad60d78b315 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
dflet 0:6ad60d78b315 32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
dflet 0:6ad60d78b315 33 *
dflet 0:6ad60d78b315 34 *****************************************************************************/
dflet 0:6ad60d78b315 35
dflet 0:6ad60d78b315 36 //*****************************************************************************
dflet 0:6ad60d78b315 37 //
dflet 0:6ad60d78b315 38 //! \addtogroup security_api
dflet 0:6ad60d78b315 39 //! @{
dflet 0:6ad60d78b315 40 //
dflet 0:6ad60d78b315 41 //*****************************************************************************
dflet 0:6ad60d78b315 42
dflet 0:6ad60d78b315 43 #include "security.h"
dflet 0:6ad60d78b315 44
dflet 0:6ad60d78b315 45 #ifndef CC3000_UNENCRYPTED_SMART_CONFIG
dflet 0:6ad60d78b315 46 // foreward sbox
dflet 0:6ad60d78b315 47 const unsigned char sbox[256] = {
dflet 0:6ad60d78b315 48 //0 1 2 3 4 5 6 7 8 9 A B C D E F
dflet 0:6ad60d78b315 49 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, //0
dflet 0:6ad60d78b315 50 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, //1
dflet 0:6ad60d78b315 51 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, //2
dflet 0:6ad60d78b315 52 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, //3
dflet 0:6ad60d78b315 53 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, //4
dflet 0:6ad60d78b315 54 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, //5
dflet 0:6ad60d78b315 55 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, //6
dflet 0:6ad60d78b315 56 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, //7
dflet 0:6ad60d78b315 57 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, //8
dflet 0:6ad60d78b315 58 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, //9
dflet 0:6ad60d78b315 59 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, //A
dflet 0:6ad60d78b315 60 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, //B
dflet 0:6ad60d78b315 61 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, //C
dflet 0:6ad60d78b315 62 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, //D
dflet 0:6ad60d78b315 63 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, //E
dflet 0:6ad60d78b315 64 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 }; //F
dflet 0:6ad60d78b315 65 // inverse sbox
dflet 0:6ad60d78b315 66 const unsigned char rsbox[256] =
dflet 0:6ad60d78b315 67 { 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb
dflet 0:6ad60d78b315 68 , 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb
dflet 0:6ad60d78b315 69 , 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e
dflet 0:6ad60d78b315 70 , 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25
dflet 0:6ad60d78b315 71 , 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92
dflet 0:6ad60d78b315 72 , 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84
dflet 0:6ad60d78b315 73 , 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06
dflet 0:6ad60d78b315 74 , 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b
dflet 0:6ad60d78b315 75 , 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73
dflet 0:6ad60d78b315 76 , 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e
dflet 0:6ad60d78b315 77 , 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b
dflet 0:6ad60d78b315 78 , 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4
dflet 0:6ad60d78b315 79 , 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f
dflet 0:6ad60d78b315 80 , 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef
dflet 0:6ad60d78b315 81 , 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61
dflet 0:6ad60d78b315 82 , 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d };
dflet 0:6ad60d78b315 83 // round constant
dflet 0:6ad60d78b315 84 const unsigned char Rcon[11] = {
dflet 0:6ad60d78b315 85 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36};
dflet 0:6ad60d78b315 86
dflet 0:6ad60d78b315 87
dflet 0:6ad60d78b315 88 unsigned char expandedKey[176];
dflet 0:6ad60d78b315 89
dflet 0:6ad60d78b315 90 //*****************************************************************************
dflet 0:6ad60d78b315 91 //
dflet 0:6ad60d78b315 92 //! expandKey
dflet 0:6ad60d78b315 93 //!
dflet 0:6ad60d78b315 94 //! @param key AES128 key - 16 bytes
dflet 0:6ad60d78b315 95 //! @param expandedKey expanded AES128 key
dflet 0:6ad60d78b315 96 //!
dflet 0:6ad60d78b315 97 //! @return none
dflet 0:6ad60d78b315 98 //!
dflet 0:6ad60d78b315 99 //! @brief expend a 16 bytes key for AES128 implementation
dflet 0:6ad60d78b315 100 //!
dflet 0:6ad60d78b315 101 //*****************************************************************************
dflet 0:6ad60d78b315 102
dflet 0:6ad60d78b315 103 void expandKey(unsigned char *expandedKey,
dflet 0:6ad60d78b315 104 unsigned char *key)
dflet 0:6ad60d78b315 105 {
dflet 0:6ad60d78b315 106 unsigned short ii, buf1;
dflet 0:6ad60d78b315 107 for (ii=0;ii<16;ii++)
dflet 0:6ad60d78b315 108 expandedKey[ii] = key[ii];
dflet 0:6ad60d78b315 109 for (ii=1;ii<11;ii++){
dflet 0:6ad60d78b315 110 buf1 = expandedKey[ii*16 - 4];
dflet 0:6ad60d78b315 111 expandedKey[ii*16 + 0] = sbox[expandedKey[ii*16 - 3]]^expandedKey[(ii-1)*16 + 0]^Rcon[ii];
dflet 0:6ad60d78b315 112 expandedKey[ii*16 + 1] = sbox[expandedKey[ii*16 - 2]]^expandedKey[(ii-1)*16 + 1];
dflet 0:6ad60d78b315 113 expandedKey[ii*16 + 2] = sbox[expandedKey[ii*16 - 1]]^expandedKey[(ii-1)*16 + 2];
dflet 0:6ad60d78b315 114 expandedKey[ii*16 + 3] = sbox[buf1 ]^expandedKey[(ii-1)*16 + 3];
dflet 0:6ad60d78b315 115 expandedKey[ii*16 + 4] = expandedKey[(ii-1)*16 + 4]^expandedKey[ii*16 + 0];
dflet 0:6ad60d78b315 116 expandedKey[ii*16 + 5] = expandedKey[(ii-1)*16 + 5]^expandedKey[ii*16 + 1];
dflet 0:6ad60d78b315 117 expandedKey[ii*16 + 6] = expandedKey[(ii-1)*16 + 6]^expandedKey[ii*16 + 2];
dflet 0:6ad60d78b315 118 expandedKey[ii*16 + 7] = expandedKey[(ii-1)*16 + 7]^expandedKey[ii*16 + 3];
dflet 0:6ad60d78b315 119 expandedKey[ii*16 + 8] = expandedKey[(ii-1)*16 + 8]^expandedKey[ii*16 + 4];
dflet 0:6ad60d78b315 120 expandedKey[ii*16 + 9] = expandedKey[(ii-1)*16 + 9]^expandedKey[ii*16 + 5];
dflet 0:6ad60d78b315 121 expandedKey[ii*16 +10] = expandedKey[(ii-1)*16 +10]^expandedKey[ii*16 + 6];
dflet 0:6ad60d78b315 122 expandedKey[ii*16 +11] = expandedKey[(ii-1)*16 +11]^expandedKey[ii*16 + 7];
dflet 0:6ad60d78b315 123 expandedKey[ii*16 +12] = expandedKey[(ii-1)*16 +12]^expandedKey[ii*16 + 8];
dflet 0:6ad60d78b315 124 expandedKey[ii*16 +13] = expandedKey[(ii-1)*16 +13]^expandedKey[ii*16 + 9];
dflet 0:6ad60d78b315 125 expandedKey[ii*16 +14] = expandedKey[(ii-1)*16 +14]^expandedKey[ii*16 +10];
dflet 0:6ad60d78b315 126 expandedKey[ii*16 +15] = expandedKey[(ii-1)*16 +15]^expandedKey[ii*16 +11];
dflet 0:6ad60d78b315 127 }
dflet 0:6ad60d78b315 128
dflet 0:6ad60d78b315 129 }
dflet 0:6ad60d78b315 130
dflet 0:6ad60d78b315 131 //*****************************************************************************
dflet 0:6ad60d78b315 132 //
dflet 0:6ad60d78b315 133 //! galois_mul2
dflet 0:6ad60d78b315 134 //!
dflet 0:6ad60d78b315 135 //! @param value argument to multiply
dflet 0:6ad60d78b315 136 //!
dflet 0:6ad60d78b315 137 //! @return multiplied argument
dflet 0:6ad60d78b315 138 //!
dflet 0:6ad60d78b315 139 //! @brief multiply by 2 in the galois field
dflet 0:6ad60d78b315 140 //!
dflet 0:6ad60d78b315 141 //*****************************************************************************
dflet 0:6ad60d78b315 142
dflet 0:6ad60d78b315 143 unsigned char galois_mul2(unsigned char value)
dflet 0:6ad60d78b315 144 {
dflet 0:6ad60d78b315 145 if (value>>7)
dflet 0:6ad60d78b315 146 {
dflet 0:6ad60d78b315 147 value = value << 1;
dflet 0:6ad60d78b315 148 return (value^0x1b);
dflet 0:6ad60d78b315 149 } else
dflet 0:6ad60d78b315 150 return value<<1;
dflet 0:6ad60d78b315 151 }
dflet 0:6ad60d78b315 152
dflet 0:6ad60d78b315 153 //*****************************************************************************
dflet 0:6ad60d78b315 154 //
dflet 0:6ad60d78b315 155 //! aes_encr
dflet 0:6ad60d78b315 156 //!
dflet 0:6ad60d78b315 157 //! @param[in] expandedKey expanded AES128 key
dflet 0:6ad60d78b315 158 //! @param[in/out] state 16 bytes of plain text and cipher text
dflet 0:6ad60d78b315 159 //!
dflet 0:6ad60d78b315 160 //! @return none
dflet 0:6ad60d78b315 161 //!
dflet 0:6ad60d78b315 162 //! @brief internal implementation of AES128 encryption.
dflet 0:6ad60d78b315 163 //! straight forward aes encryption implementation
dflet 0:6ad60d78b315 164 //! first the group of operations
dflet 0:6ad60d78b315 165 //! - addRoundKey
dflet 0:6ad60d78b315 166 //! - subbytes
dflet 0:6ad60d78b315 167 //! - shiftrows
dflet 0:6ad60d78b315 168 //! - mixcolums
dflet 0:6ad60d78b315 169 //! is executed 9 times, after this addroundkey to finish the 9th
dflet 0:6ad60d78b315 170 //! round, after that the 10th round without mixcolums
dflet 0:6ad60d78b315 171 //! no further subfunctions to save cycles for function calls
dflet 0:6ad60d78b315 172 //! no structuring with "for (....)" to save cycles.
dflet 0:6ad60d78b315 173 //!
dflet 0:6ad60d78b315 174 //!
dflet 0:6ad60d78b315 175 //*****************************************************************************
dflet 0:6ad60d78b315 176
dflet 0:6ad60d78b315 177 void aes_encr(unsigned char *state, unsigned char *expandedKey)
dflet 0:6ad60d78b315 178 {
dflet 0:6ad60d78b315 179 unsigned char buf1, buf2, buf3, round;
dflet 0:6ad60d78b315 180
dflet 0:6ad60d78b315 181 for (round = 0; round < 9; round ++){
dflet 0:6ad60d78b315 182 // addroundkey, sbox and shiftrows
dflet 0:6ad60d78b315 183 // row 0
dflet 0:6ad60d78b315 184 state[ 0] = sbox[(state[ 0] ^ expandedKey[(round*16) ])];
dflet 0:6ad60d78b315 185 state[ 4] = sbox[(state[ 4] ^ expandedKey[(round*16) + 4])];
dflet 0:6ad60d78b315 186 state[ 8] = sbox[(state[ 8] ^ expandedKey[(round*16) + 8])];
dflet 0:6ad60d78b315 187 state[12] = sbox[(state[12] ^ expandedKey[(round*16) + 12])];
dflet 0:6ad60d78b315 188 // row 1
dflet 0:6ad60d78b315 189 buf1 = state[1] ^ expandedKey[(round*16) + 1];
dflet 0:6ad60d78b315 190 state[ 1] = sbox[(state[ 5] ^ expandedKey[(round*16) + 5])];
dflet 0:6ad60d78b315 191 state[ 5] = sbox[(state[ 9] ^ expandedKey[(round*16) + 9])];
dflet 0:6ad60d78b315 192 state[ 9] = sbox[(state[13] ^ expandedKey[(round*16) + 13])];
dflet 0:6ad60d78b315 193 state[13] = sbox[buf1];
dflet 0:6ad60d78b315 194 // row 2
dflet 0:6ad60d78b315 195 buf1 = state[2] ^ expandedKey[(round*16) + 2];
dflet 0:6ad60d78b315 196 buf2 = state[6] ^ expandedKey[(round*16) + 6];
dflet 0:6ad60d78b315 197 state[ 2] = sbox[(state[10] ^ expandedKey[(round*16) + 10])];
dflet 0:6ad60d78b315 198 state[ 6] = sbox[(state[14] ^ expandedKey[(round*16) + 14])];
dflet 0:6ad60d78b315 199 state[10] = sbox[buf1];
dflet 0:6ad60d78b315 200 state[14] = sbox[buf2];
dflet 0:6ad60d78b315 201 // row 3
dflet 0:6ad60d78b315 202 buf1 = state[15] ^ expandedKey[(round*16) + 15];
dflet 0:6ad60d78b315 203 state[15] = sbox[(state[11] ^ expandedKey[(round*16) + 11])];
dflet 0:6ad60d78b315 204 state[11] = sbox[(state[ 7] ^ expandedKey[(round*16) + 7])];
dflet 0:6ad60d78b315 205 state[ 7] = sbox[(state[ 3] ^ expandedKey[(round*16) + 3])];
dflet 0:6ad60d78b315 206 state[ 3] = sbox[buf1];
dflet 0:6ad60d78b315 207
dflet 0:6ad60d78b315 208 // mixcolums //////////
dflet 0:6ad60d78b315 209 // col1
dflet 0:6ad60d78b315 210 buf1 = state[0] ^ state[1] ^ state[2] ^ state[3];
dflet 0:6ad60d78b315 211 buf2 = state[0];
dflet 0:6ad60d78b315 212 buf3 = state[0]^state[1]; buf3=galois_mul2(buf3); state[0] = state[0] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 213 buf3 = state[1]^state[2]; buf3=galois_mul2(buf3); state[1] = state[1] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 214 buf3 = state[2]^state[3]; buf3=galois_mul2(buf3); state[2] = state[2] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 215 buf3 = state[3]^buf2; buf3=galois_mul2(buf3); state[3] = state[3] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 216 // col2
dflet 0:6ad60d78b315 217 buf1 = state[4] ^ state[5] ^ state[6] ^ state[7];
dflet 0:6ad60d78b315 218 buf2 = state[4];
dflet 0:6ad60d78b315 219 buf3 = state[4]^state[5]; buf3=galois_mul2(buf3); state[4] = state[4] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 220 buf3 = state[5]^state[6]; buf3=galois_mul2(buf3); state[5] = state[5] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 221 buf3 = state[6]^state[7]; buf3=galois_mul2(buf3); state[6] = state[6] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 222 buf3 = state[7]^buf2; buf3=galois_mul2(buf3); state[7] = state[7] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 223 // col3
dflet 0:6ad60d78b315 224 buf1 = state[8] ^ state[9] ^ state[10] ^ state[11];
dflet 0:6ad60d78b315 225 buf2 = state[8];
dflet 0:6ad60d78b315 226 buf3 = state[8]^state[9]; buf3=galois_mul2(buf3); state[8] = state[8] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 227 buf3 = state[9]^state[10]; buf3=galois_mul2(buf3); state[9] = state[9] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 228 buf3 = state[10]^state[11]; buf3=galois_mul2(buf3); state[10] = state[10] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 229 buf3 = state[11]^buf2; buf3=galois_mul2(buf3); state[11] = state[11] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 230 // col4
dflet 0:6ad60d78b315 231 buf1 = state[12] ^ state[13] ^ state[14] ^ state[15];
dflet 0:6ad60d78b315 232 buf2 = state[12];
dflet 0:6ad60d78b315 233 buf3 = state[12]^state[13]; buf3=galois_mul2(buf3); state[12] = state[12] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 234 buf3 = state[13]^state[14]; buf3=galois_mul2(buf3); state[13] = state[13] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 235 buf3 = state[14]^state[15]; buf3=galois_mul2(buf3); state[14] = state[14] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 236 buf3 = state[15]^buf2; buf3=galois_mul2(buf3); state[15] = state[15] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 237
dflet 0:6ad60d78b315 238 }
dflet 0:6ad60d78b315 239 // 10th round without mixcols
dflet 0:6ad60d78b315 240 state[ 0] = sbox[(state[ 0] ^ expandedKey[(round*16) ])];
dflet 0:6ad60d78b315 241 state[ 4] = sbox[(state[ 4] ^ expandedKey[(round*16) + 4])];
dflet 0:6ad60d78b315 242 state[ 8] = sbox[(state[ 8] ^ expandedKey[(round*16) + 8])];
dflet 0:6ad60d78b315 243 state[12] = sbox[(state[12] ^ expandedKey[(round*16) + 12])];
dflet 0:6ad60d78b315 244 // row 1
dflet 0:6ad60d78b315 245 buf1 = state[1] ^ expandedKey[(round*16) + 1];
dflet 0:6ad60d78b315 246 state[ 1] = sbox[(state[ 5] ^ expandedKey[(round*16) + 5])];
dflet 0:6ad60d78b315 247 state[ 5] = sbox[(state[ 9] ^ expandedKey[(round*16) + 9])];
dflet 0:6ad60d78b315 248 state[ 9] = sbox[(state[13] ^ expandedKey[(round*16) + 13])];
dflet 0:6ad60d78b315 249 state[13] = sbox[buf1];
dflet 0:6ad60d78b315 250 // row 2
dflet 0:6ad60d78b315 251 buf1 = state[2] ^ expandedKey[(round*16) + 2];
dflet 0:6ad60d78b315 252 buf2 = state[6] ^ expandedKey[(round*16) + 6];
dflet 0:6ad60d78b315 253 state[ 2] = sbox[(state[10] ^ expandedKey[(round*16) + 10])];
dflet 0:6ad60d78b315 254 state[ 6] = sbox[(state[14] ^ expandedKey[(round*16) + 14])];
dflet 0:6ad60d78b315 255 state[10] = sbox[buf1];
dflet 0:6ad60d78b315 256 state[14] = sbox[buf2];
dflet 0:6ad60d78b315 257 // row 3
dflet 0:6ad60d78b315 258 buf1 = state[15] ^ expandedKey[(round*16) + 15];
dflet 0:6ad60d78b315 259 state[15] = sbox[(state[11] ^ expandedKey[(round*16) + 11])];
dflet 0:6ad60d78b315 260 state[11] = sbox[(state[ 7] ^ expandedKey[(round*16) + 7])];
dflet 0:6ad60d78b315 261 state[ 7] = sbox[(state[ 3] ^ expandedKey[(round*16) + 3])];
dflet 0:6ad60d78b315 262 state[ 3] = sbox[buf1];
dflet 0:6ad60d78b315 263 // last addroundkey
dflet 0:6ad60d78b315 264 state[ 0]^=expandedKey[160];
dflet 0:6ad60d78b315 265 state[ 1]^=expandedKey[161];
dflet 0:6ad60d78b315 266 state[ 2]^=expandedKey[162];
dflet 0:6ad60d78b315 267 state[ 3]^=expandedKey[163];
dflet 0:6ad60d78b315 268 state[ 4]^=expandedKey[164];
dflet 0:6ad60d78b315 269 state[ 5]^=expandedKey[165];
dflet 0:6ad60d78b315 270 state[ 6]^=expandedKey[166];
dflet 0:6ad60d78b315 271 state[ 7]^=expandedKey[167];
dflet 0:6ad60d78b315 272 state[ 8]^=expandedKey[168];
dflet 0:6ad60d78b315 273 state[ 9]^=expandedKey[169];
dflet 0:6ad60d78b315 274 state[10]^=expandedKey[170];
dflet 0:6ad60d78b315 275 state[11]^=expandedKey[171];
dflet 0:6ad60d78b315 276 state[12]^=expandedKey[172];
dflet 0:6ad60d78b315 277 state[13]^=expandedKey[173];
dflet 0:6ad60d78b315 278 state[14]^=expandedKey[174];
dflet 0:6ad60d78b315 279 state[15]^=expandedKey[175];
dflet 0:6ad60d78b315 280 }
dflet 0:6ad60d78b315 281
dflet 0:6ad60d78b315 282 //*****************************************************************************
dflet 0:6ad60d78b315 283 //
dflet 0:6ad60d78b315 284 //! aes_decr
dflet 0:6ad60d78b315 285 //!
dflet 0:6ad60d78b315 286 //! @param[in] expandedKey expanded AES128 key
dflet 0:6ad60d78b315 287 //! @param[in\out] state 16 bytes of cipher text and plain text
dflet 0:6ad60d78b315 288 //!
dflet 0:6ad60d78b315 289 //! @return none
dflet 0:6ad60d78b315 290 //!
dflet 0:6ad60d78b315 291 //! @brief internal implementation of AES128 decryption.
dflet 0:6ad60d78b315 292 //! straight forward aes decryption implementation
dflet 0:6ad60d78b315 293 //! the order of substeps is the exact reverse of decryption
dflet 0:6ad60d78b315 294 //! inverse functions:
dflet 0:6ad60d78b315 295 //! - addRoundKey is its own inverse
dflet 0:6ad60d78b315 296 //! - rsbox is inverse of sbox
dflet 0:6ad60d78b315 297 //! - rightshift instead of leftshift
dflet 0:6ad60d78b315 298 //! - invMixColumns = barreto + mixColumns
dflet 0:6ad60d78b315 299 //! no further subfunctions to save cycles for function calls
dflet 0:6ad60d78b315 300 //! no structuring with "for (....)" to save cycles
dflet 0:6ad60d78b315 301 //!
dflet 0:6ad60d78b315 302 //*****************************************************************************
dflet 0:6ad60d78b315 303
dflet 0:6ad60d78b315 304 void aes_decr(unsigned char *state, unsigned char *expandedKey)
dflet 0:6ad60d78b315 305 {
dflet 0:6ad60d78b315 306 unsigned char buf1, buf2, buf3;
dflet 0:6ad60d78b315 307 signed char round;
dflet 0:6ad60d78b315 308 round = 9;
dflet 0:6ad60d78b315 309
dflet 0:6ad60d78b315 310 // initial addroundkey
dflet 0:6ad60d78b315 311 state[ 0]^=expandedKey[160];
dflet 0:6ad60d78b315 312 state[ 1]^=expandedKey[161];
dflet 0:6ad60d78b315 313 state[ 2]^=expandedKey[162];
dflet 0:6ad60d78b315 314 state[ 3]^=expandedKey[163];
dflet 0:6ad60d78b315 315 state[ 4]^=expandedKey[164];
dflet 0:6ad60d78b315 316 state[ 5]^=expandedKey[165];
dflet 0:6ad60d78b315 317 state[ 6]^=expandedKey[166];
dflet 0:6ad60d78b315 318 state[ 7]^=expandedKey[167];
dflet 0:6ad60d78b315 319 state[ 8]^=expandedKey[168];
dflet 0:6ad60d78b315 320 state[ 9]^=expandedKey[169];
dflet 0:6ad60d78b315 321 state[10]^=expandedKey[170];
dflet 0:6ad60d78b315 322 state[11]^=expandedKey[171];
dflet 0:6ad60d78b315 323 state[12]^=expandedKey[172];
dflet 0:6ad60d78b315 324 state[13]^=expandedKey[173];
dflet 0:6ad60d78b315 325 state[14]^=expandedKey[174];
dflet 0:6ad60d78b315 326 state[15]^=expandedKey[175];
dflet 0:6ad60d78b315 327
dflet 0:6ad60d78b315 328 // 10th round without mixcols
dflet 0:6ad60d78b315 329 state[ 0] = rsbox[state[ 0]] ^ expandedKey[(round*16) ];
dflet 0:6ad60d78b315 330 state[ 4] = rsbox[state[ 4]] ^ expandedKey[(round*16) + 4];
dflet 0:6ad60d78b315 331 state[ 8] = rsbox[state[ 8]] ^ expandedKey[(round*16) + 8];
dflet 0:6ad60d78b315 332 state[12] = rsbox[state[12]] ^ expandedKey[(round*16) + 12];
dflet 0:6ad60d78b315 333 // row 1
dflet 0:6ad60d78b315 334 buf1 = rsbox[state[13]] ^ expandedKey[(round*16) + 1];
dflet 0:6ad60d78b315 335 state[13] = rsbox[state[ 9]] ^ expandedKey[(round*16) + 13];
dflet 0:6ad60d78b315 336 state[ 9] = rsbox[state[ 5]] ^ expandedKey[(round*16) + 9];
dflet 0:6ad60d78b315 337 state[ 5] = rsbox[state[ 1]] ^ expandedKey[(round*16) + 5];
dflet 0:6ad60d78b315 338 state[ 1] = buf1;
dflet 0:6ad60d78b315 339 // row 2
dflet 0:6ad60d78b315 340 buf1 = rsbox[state[ 2]] ^ expandedKey[(round*16) + 10];
dflet 0:6ad60d78b315 341 buf2 = rsbox[state[ 6]] ^ expandedKey[(round*16) + 14];
dflet 0:6ad60d78b315 342 state[ 2] = rsbox[state[10]] ^ expandedKey[(round*16) + 2];
dflet 0:6ad60d78b315 343 state[ 6] = rsbox[state[14]] ^ expandedKey[(round*16) + 6];
dflet 0:6ad60d78b315 344 state[10] = buf1;
dflet 0:6ad60d78b315 345 state[14] = buf2;
dflet 0:6ad60d78b315 346 // row 3
dflet 0:6ad60d78b315 347 buf1 = rsbox[state[ 3]] ^ expandedKey[(round*16) + 15];
dflet 0:6ad60d78b315 348 state[ 3] = rsbox[state[ 7]] ^ expandedKey[(round*16) + 3];
dflet 0:6ad60d78b315 349 state[ 7] = rsbox[state[11]] ^ expandedKey[(round*16) + 7];
dflet 0:6ad60d78b315 350 state[11] = rsbox[state[15]] ^ expandedKey[(round*16) + 11];
dflet 0:6ad60d78b315 351 state[15] = buf1;
dflet 0:6ad60d78b315 352
dflet 0:6ad60d78b315 353 for (round = 8; round >= 0; round--){
dflet 0:6ad60d78b315 354 // barreto
dflet 0:6ad60d78b315 355 //col1
dflet 0:6ad60d78b315 356 buf1 = galois_mul2(galois_mul2(state[0]^state[2]));
dflet 0:6ad60d78b315 357 buf2 = galois_mul2(galois_mul2(state[1]^state[3]));
dflet 0:6ad60d78b315 358 state[0] ^= buf1; state[1] ^= buf2; state[2] ^= buf1; state[3] ^= buf2;
dflet 0:6ad60d78b315 359 //col2
dflet 0:6ad60d78b315 360 buf1 = galois_mul2(galois_mul2(state[4]^state[6]));
dflet 0:6ad60d78b315 361 buf2 = galois_mul2(galois_mul2(state[5]^state[7]));
dflet 0:6ad60d78b315 362 state[4] ^= buf1; state[5] ^= buf2; state[6] ^= buf1; state[7] ^= buf2;
dflet 0:6ad60d78b315 363 //col3
dflet 0:6ad60d78b315 364 buf1 = galois_mul2(galois_mul2(state[8]^state[10]));
dflet 0:6ad60d78b315 365 buf2 = galois_mul2(galois_mul2(state[9]^state[11]));
dflet 0:6ad60d78b315 366 state[8] ^= buf1; state[9] ^= buf2; state[10] ^= buf1; state[11] ^= buf2;
dflet 0:6ad60d78b315 367 //col4
dflet 0:6ad60d78b315 368 buf1 = galois_mul2(galois_mul2(state[12]^state[14]));
dflet 0:6ad60d78b315 369 buf2 = galois_mul2(galois_mul2(state[13]^state[15]));
dflet 0:6ad60d78b315 370 state[12] ^= buf1; state[13] ^= buf2; state[14] ^= buf1; state[15] ^= buf2;
dflet 0:6ad60d78b315 371 // mixcolums //////////
dflet 0:6ad60d78b315 372 // col1
dflet 0:6ad60d78b315 373 buf1 = state[0] ^ state[1] ^ state[2] ^ state[3];
dflet 0:6ad60d78b315 374 buf2 = state[0];
dflet 0:6ad60d78b315 375 buf3 = state[0]^state[1]; buf3=galois_mul2(buf3); state[0] = state[0] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 376 buf3 = state[1]^state[2]; buf3=galois_mul2(buf3); state[1] = state[1] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 377 buf3 = state[2]^state[3]; buf3=galois_mul2(buf3); state[2] = state[2] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 378 buf3 = state[3]^buf2; buf3=galois_mul2(buf3); state[3] = state[3] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 379 // col2
dflet 0:6ad60d78b315 380 buf1 = state[4] ^ state[5] ^ state[6] ^ state[7];
dflet 0:6ad60d78b315 381 buf2 = state[4];
dflet 0:6ad60d78b315 382 buf3 = state[4]^state[5]; buf3=galois_mul2(buf3); state[4] = state[4] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 383 buf3 = state[5]^state[6]; buf3=galois_mul2(buf3); state[5] = state[5] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 384 buf3 = state[6]^state[7]; buf3=galois_mul2(buf3); state[6] = state[6] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 385 buf3 = state[7]^buf2; buf3=galois_mul2(buf3); state[7] = state[7] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 386 // col3
dflet 0:6ad60d78b315 387 buf1 = state[8] ^ state[9] ^ state[10] ^ state[11];
dflet 0:6ad60d78b315 388 buf2 = state[8];
dflet 0:6ad60d78b315 389 buf3 = state[8]^state[9]; buf3=galois_mul2(buf3); state[8] = state[8] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 390 buf3 = state[9]^state[10]; buf3=galois_mul2(buf3); state[9] = state[9] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 391 buf3 = state[10]^state[11]; buf3=galois_mul2(buf3); state[10] = state[10] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 392 buf3 = state[11]^buf2; buf3=galois_mul2(buf3); state[11] = state[11] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 393 // col4
dflet 0:6ad60d78b315 394 buf1 = state[12] ^ state[13] ^ state[14] ^ state[15];
dflet 0:6ad60d78b315 395 buf2 = state[12];
dflet 0:6ad60d78b315 396 buf3 = state[12]^state[13]; buf3=galois_mul2(buf3); state[12] = state[12] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 397 buf3 = state[13]^state[14]; buf3=galois_mul2(buf3); state[13] = state[13] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 398 buf3 = state[14]^state[15]; buf3=galois_mul2(buf3); state[14] = state[14] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 399 buf3 = state[15]^buf2; buf3=galois_mul2(buf3); state[15] = state[15] ^ buf3 ^ buf1;
dflet 0:6ad60d78b315 400
dflet 0:6ad60d78b315 401 // addroundkey, rsbox and shiftrows
dflet 0:6ad60d78b315 402 // row 0
dflet 0:6ad60d78b315 403 state[ 0] = rsbox[state[ 0]] ^ expandedKey[(round*16) ];
dflet 0:6ad60d78b315 404 state[ 4] = rsbox[state[ 4]] ^ expandedKey[(round*16) + 4];
dflet 0:6ad60d78b315 405 state[ 8] = rsbox[state[ 8]] ^ expandedKey[(round*16) + 8];
dflet 0:6ad60d78b315 406 state[12] = rsbox[state[12]] ^ expandedKey[(round*16) + 12];
dflet 0:6ad60d78b315 407 // row 1
dflet 0:6ad60d78b315 408 buf1 = rsbox[state[13]] ^ expandedKey[(round*16) + 1];
dflet 0:6ad60d78b315 409 state[13] = rsbox[state[ 9]] ^ expandedKey[(round*16) + 13];
dflet 0:6ad60d78b315 410 state[ 9] = rsbox[state[ 5]] ^ expandedKey[(round*16) + 9];
dflet 0:6ad60d78b315 411 state[ 5] = rsbox[state[ 1]] ^ expandedKey[(round*16) + 5];
dflet 0:6ad60d78b315 412 state[ 1] = buf1;
dflet 0:6ad60d78b315 413 // row 2
dflet 0:6ad60d78b315 414 buf1 = rsbox[state[ 2]] ^ expandedKey[(round*16) + 10];
dflet 0:6ad60d78b315 415 buf2 = rsbox[state[ 6]] ^ expandedKey[(round*16) + 14];
dflet 0:6ad60d78b315 416 state[ 2] = rsbox[state[10]] ^ expandedKey[(round*16) + 2];
dflet 0:6ad60d78b315 417 state[ 6] = rsbox[state[14]] ^ expandedKey[(round*16) + 6];
dflet 0:6ad60d78b315 418 state[10] = buf1;
dflet 0:6ad60d78b315 419 state[14] = buf2;
dflet 0:6ad60d78b315 420 // row 3
dflet 0:6ad60d78b315 421 buf1 = rsbox[state[ 3]] ^ expandedKey[(round*16) + 15];
dflet 0:6ad60d78b315 422 state[ 3] = rsbox[state[ 7]] ^ expandedKey[(round*16) + 3];
dflet 0:6ad60d78b315 423 state[ 7] = rsbox[state[11]] ^ expandedKey[(round*16) + 7];
dflet 0:6ad60d78b315 424 state[11] = rsbox[state[15]] ^ expandedKey[(round*16) + 11];
dflet 0:6ad60d78b315 425 state[15] = buf1;
dflet 0:6ad60d78b315 426 }
dflet 0:6ad60d78b315 427
dflet 0:6ad60d78b315 428 }
dflet 0:6ad60d78b315 429
dflet 0:6ad60d78b315 430 //*****************************************************************************
dflet 0:6ad60d78b315 431 //
dflet 0:6ad60d78b315 432 //! aes_encrypt
dflet 0:6ad60d78b315 433 //!
dflet 0:6ad60d78b315 434 //! @param[in] key AES128 key of size 16 bytes
dflet 0:6ad60d78b315 435 //! @param[in\out] state 16 bytes of plain text and cipher text
dflet 0:6ad60d78b315 436 //!
dflet 0:6ad60d78b315 437 //! @return none
dflet 0:6ad60d78b315 438 //!
dflet 0:6ad60d78b315 439 //! @brief AES128 encryption:
dflet 0:6ad60d78b315 440 //! Given AES128 key and 16 bytes plain text, cipher text of 16 bytes
dflet 0:6ad60d78b315 441 //! is computed. The AES implementation is in mode ECB (Electronic
dflet 0:6ad60d78b315 442 //! Code Book).
dflet 0:6ad60d78b315 443 //!
dflet 0:6ad60d78b315 444 //!
dflet 0:6ad60d78b315 445 //*****************************************************************************
dflet 0:6ad60d78b315 446
dflet 0:6ad60d78b315 447 void aes_encrypt(unsigned char *state,
dflet 0:6ad60d78b315 448 unsigned char *key)
dflet 0:6ad60d78b315 449 {
dflet 0:6ad60d78b315 450 // expand the key into 176 bytes
dflet 0:6ad60d78b315 451 expandKey(expandedKey, key);
dflet 0:6ad60d78b315 452 aes_encr(state, expandedKey);
dflet 0:6ad60d78b315 453 }
dflet 0:6ad60d78b315 454
dflet 0:6ad60d78b315 455 //*****************************************************************************
dflet 0:6ad60d78b315 456 //
dflet 0:6ad60d78b315 457 //! aes_decrypt
dflet 0:6ad60d78b315 458 //!
dflet 0:6ad60d78b315 459 //! @param[in] key AES128 key of size 16 bytes
dflet 0:6ad60d78b315 460 //! @param[in\out] state 16 bytes of cipher text and plain text
dflet 0:6ad60d78b315 461 //!
dflet 0:6ad60d78b315 462 //! @return none
dflet 0:6ad60d78b315 463 //!
dflet 0:6ad60d78b315 464 //! @brief AES128 decryption:
dflet 0:6ad60d78b315 465 //! Given AES128 key and 16 bytes cipher text, plain text of 16 bytes
dflet 0:6ad60d78b315 466 //! is computed The AES implementation is in mode ECB
dflet 0:6ad60d78b315 467 //! (Electronic Code Book).
dflet 0:6ad60d78b315 468 //!
dflet 0:6ad60d78b315 469 //!
dflet 0:6ad60d78b315 470 //*****************************************************************************
dflet 0:6ad60d78b315 471
dflet 0:6ad60d78b315 472 void aes_decrypt(unsigned char *state,
dflet 0:6ad60d78b315 473 unsigned char *key)
dflet 0:6ad60d78b315 474 {
dflet 0:6ad60d78b315 475 expandKey(expandedKey, key); // expand the key into 176 bytes
dflet 0:6ad60d78b315 476 aes_decr(state, expandedKey);
dflet 0:6ad60d78b315 477 }
dflet 0:6ad60d78b315 478
dflet 0:6ad60d78b315 479 //*****************************************************************************
dflet 0:6ad60d78b315 480 //
dflet 0:6ad60d78b315 481 //! aes_read_key
dflet 0:6ad60d78b315 482 //!
dflet 0:6ad60d78b315 483 //! @param[out] key AES128 key of size 16 bytes
dflet 0:6ad60d78b315 484 //!
dflet 0:6ad60d78b315 485 //! @return on success 0, error otherwise.
dflet 0:6ad60d78b315 486 //!
dflet 0:6ad60d78b315 487 //! @brief Reads AES128 key from EEPROM
dflet 0:6ad60d78b315 488 //! Reads the AES128 key from fileID #12 in EEPROM
dflet 0:6ad60d78b315 489 //! returns an error if the key does not exist.
dflet 0:6ad60d78b315 490 //!
dflet 0:6ad60d78b315 491 //!
dflet 0:6ad60d78b315 492 //*****************************************************************************
dflet 0:6ad60d78b315 493
dflet 0:6ad60d78b315 494 signed long aes_read_key(unsigned char *key)
dflet 0:6ad60d78b315 495 {
dflet 0:6ad60d78b315 496 signed long returnValue;
dflet 0:6ad60d78b315 497
dflet 0:6ad60d78b315 498 returnValue = nvmem_read(NVMEM_AES128_KEY_FILEID, AES128_KEY_SIZE, 0, key);
dflet 0:6ad60d78b315 499
dflet 0:6ad60d78b315 500 return returnValue;
dflet 0:6ad60d78b315 501 }
dflet 0:6ad60d78b315 502
dflet 0:6ad60d78b315 503 //*****************************************************************************
dflet 0:6ad60d78b315 504 //
dflet 0:6ad60d78b315 505 //! aes_write_key
dflet 0:6ad60d78b315 506 //!
dflet 0:6ad60d78b315 507 //! @param[out] key AES128 key of size 16 bytes
dflet 0:6ad60d78b315 508 //!
dflet 0:6ad60d78b315 509 //! @return on success 0, error otherwise.
dflet 0:6ad60d78b315 510 //!
dflet 0:6ad60d78b315 511 //! @brief writes AES128 key from EEPROM
dflet 0:6ad60d78b315 512 //! Writes the AES128 key to fileID #12 in EEPROM
dflet 0:6ad60d78b315 513 //!
dflet 0:6ad60d78b315 514 //!
dflet 0:6ad60d78b315 515 //*****************************************************************************
dflet 0:6ad60d78b315 516
dflet 0:6ad60d78b315 517 signed long aes_write_key(unsigned char *key)
dflet 0:6ad60d78b315 518 {
dflet 0:6ad60d78b315 519 signed long returnValue;
dflet 0:6ad60d78b315 520
dflet 0:6ad60d78b315 521 returnValue = nvmem_write(NVMEM_AES128_KEY_FILEID, AES128_KEY_SIZE, 0, key);
dflet 0:6ad60d78b315 522
dflet 0:6ad60d78b315 523 return returnValue;
dflet 0:6ad60d78b315 524 }
dflet 0:6ad60d78b315 525
dflet 0:6ad60d78b315 526 #endif //CC3000_UNENCRYPTED_SMART_CONFIG
dflet 0:6ad60d78b315 527
dflet 0:6ad60d78b315 528 //*****************************************************************************
dflet 0:6ad60d78b315 529 //
dflet 0:6ad60d78b315 530 // Close the Doxygen group.
dflet 0:6ad60d78b315 531 //! @}
dflet 0:6ad60d78b315 532 //
dflet 0:6ad60d78b315 533 //*****************************************************************************
dflet 0:6ad60d78b315 534