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cc3000_hostdriver_mbedsocket
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cc3000_security.cpp
00001 /***************************************************************************** 00002 * 00003 * C++ interface/implementation created by Martin Kojtal (0xc0170). Thanks to 00004 * Jim Carver and Frank Vannieuwkerke for their inital cc3000 mbed port and 00005 * provided help. 00006 * 00007 * This version of "host driver" uses CC3000 Host Driver Implementation. Thus 00008 * read the following copyright: 00009 * 00010 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ 00011 * 00012 * Redistribution and use in source and binary forms, with or without 00013 * modification, are permitted provided that the following conditions 00014 * are met: 00015 * 00016 * Redistributions of source code must retain the above copyright 00017 * notice, this list of conditions and the following disclaimer. 00018 * 00019 * Redistributions in binary form must reproduce the above copyright 00020 * notice, this list of conditions and the following disclaimer in the 00021 * documentation and/or other materials provided with the 00022 * distribution. 00023 * 00024 * Neither the name of Texas Instruments Incorporated nor the names of 00025 * its contributors may be used to endorse or promote products derived 00026 * from this software without specific prior written permission. 00027 * 00028 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 00029 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00030 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 00031 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 00032 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00033 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00034 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00035 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 00036 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00037 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 00038 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00039 * 00040 *****************************************************************************/ 00041 #include "cc3000.h" 00042 00043 namespace mbed_cc3000 { 00044 00045 #ifndef CC3000_UNENCRYPTED_SMART_CONFIG 00046 00047 // forward sbox 00048 static const uint8_t sbox[256] = { 00049 //0 1 2 3 4 5 6 7 8 9 A B C D E F 00050 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, //0 00051 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, //1 00052 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, //2 00053 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, //3 00054 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, //4 00055 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, //5 00056 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, //6 00057 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, //7 00058 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, //8 00059 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, //9 00060 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, //A 00061 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, //B 00062 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, //C 00063 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, //D 00064 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, //E 00065 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 }; //F 00066 // inverse sbox 00067 static const uint8_t rsbox[256] = 00068 { 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb 00069 , 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb 00070 , 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e 00071 , 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25 00072 , 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92 00073 , 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84 00074 , 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06 00075 , 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b 00076 , 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73 00077 , 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e 00078 , 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b 00079 , 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4 00080 , 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f 00081 , 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef 00082 , 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61 00083 , 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d }; 00084 // round constant 00085 static const uint8_t Rcon[11] = {0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36}; 00086 00087 void cc3000_security::expandKey(uint8_t *expanded_key, uint8_t *key) { 00088 uint16_t ii, buf1; 00089 for (ii=0;ii<16;ii++) 00090 expanded_key[ii] = key[ii]; 00091 for (ii=1;ii<11;ii++) 00092 { 00093 buf1 = expanded_key[ii*16 - 4]; 00094 expanded_key[ii*16 + 0] = sbox[expanded_key[ii*16 - 3]]^expanded_key[(ii-1)*16 + 0]^Rcon[ii]; 00095 expanded_key[ii*16 + 1] = sbox[expanded_key[ii*16 - 2]]^expanded_key[(ii-1)*16 + 1]; 00096 expanded_key[ii*16 + 2] = sbox[expanded_key[ii*16 - 1]]^expanded_key[(ii-1)*16 + 2]; 00097 expanded_key[ii*16 + 3] = sbox[buf1 ]^expanded_key[(ii-1)*16 + 3]; 00098 expanded_key[ii*16 + 4] = expanded_key[(ii-1)*16 + 4]^expanded_key[ii*16 + 0]; 00099 expanded_key[ii*16 + 5] = expanded_key[(ii-1)*16 + 5]^expanded_key[ii*16 + 1]; 00100 expanded_key[ii*16 + 6] = expanded_key[(ii-1)*16 + 6]^expanded_key[ii*16 + 2]; 00101 expanded_key[ii*16 + 7] = expanded_key[(ii-1)*16 + 7]^expanded_key[ii*16 + 3]; 00102 expanded_key[ii*16 + 8] = expanded_key[(ii-1)*16 + 8]^expanded_key[ii*16 + 4]; 00103 expanded_key[ii*16 + 9] = expanded_key[(ii-1)*16 + 9]^expanded_key[ii*16 + 5]; 00104 expanded_key[ii*16 +10] = expanded_key[(ii-1)*16 +10]^expanded_key[ii*16 + 6]; 00105 expanded_key[ii*16 +11] = expanded_key[(ii-1)*16 +11]^expanded_key[ii*16 + 7]; 00106 expanded_key[ii*16 +12] = expanded_key[(ii-1)*16 +12]^expanded_key[ii*16 + 8]; 00107 expanded_key[ii*16 +13] = expanded_key[(ii-1)*16 +13]^expanded_key[ii*16 + 9]; 00108 expanded_key[ii*16 +14] = expanded_key[(ii-1)*16 +14]^expanded_key[ii*16 +10]; 00109 expanded_key[ii*16 +15] = expanded_key[(ii-1)*16 +15]^expanded_key[ii*16 +11]; 00110 } 00111 } 00112 00113 uint8_t cc3000_security::galois_mul2(uint8_t value) { 00114 if (value >> 7) { 00115 value = value << 1; 00116 return (value ^ 0x1b); 00117 } else { 00118 return (value << 1); 00119 } 00120 } 00121 00122 void cc3000_security::aes_encr(uint8_t *state, uint8_t *expanded_key) { 00123 uint8_t buf1, buf2, buf3, round; 00124 00125 for (round = 0; round < 9; round ++) 00126 { 00127 // addroundkey, sbox and shiftrows 00128 // row 0 00129 state[ 0] = sbox[(state[ 0] ^ expanded_key[(round*16) ])]; 00130 state[ 4] = sbox[(state[ 4] ^ expanded_key[(round*16) + 4])]; 00131 state[ 8] = sbox[(state[ 8] ^ expanded_key[(round*16) + 8])]; 00132 state[12] = sbox[(state[12] ^ expanded_key[(round*16) + 12])]; 00133 // row 1 00134 buf1 = state[1] ^ expanded_key[(round*16) + 1]; 00135 state[ 1] = sbox[(state[ 5] ^ expanded_key[(round*16) + 5])]; 00136 state[ 5] = sbox[(state[ 9] ^ expanded_key[(round*16) + 9])]; 00137 state[ 9] = sbox[(state[13] ^ expanded_key[(round*16) + 13])]; 00138 state[13] = sbox[buf1]; 00139 // row 2 00140 buf1 = state[2] ^ expanded_key[(round*16) + 2]; 00141 buf2 = state[6] ^ expanded_key[(round*16) + 6]; 00142 state[ 2] = sbox[(state[10] ^ expanded_key[(round*16) + 10])]; 00143 state[ 6] = sbox[(state[14] ^ expanded_key[(round*16) + 14])]; 00144 state[10] = sbox[buf1]; 00145 state[14] = sbox[buf2]; 00146 // row 3 00147 buf1 = state[15] ^ expanded_key[(round*16) + 15]; 00148 state[15] = sbox[(state[11] ^ expanded_key[(round*16) + 11])]; 00149 state[11] = sbox[(state[ 7] ^ expanded_key[(round*16) + 7])]; 00150 state[ 7] = sbox[(state[ 3] ^ expanded_key[(round*16) + 3])]; 00151 state[ 3] = sbox[buf1]; 00152 00153 // mixcolums ////////// 00154 // col1 00155 buf1 = state[0] ^ state[1] ^ state[2] ^ state[3]; 00156 buf2 = state[0]; 00157 buf3 = state[0]^state[1]; buf3=galois_mul2(buf3); state[0] = state[0] ^ buf3 ^ buf1; 00158 buf3 = state[1]^state[2]; buf3=galois_mul2(buf3); state[1] = state[1] ^ buf3 ^ buf1; 00159 buf3 = state[2]^state[3]; buf3=galois_mul2(buf3); state[2] = state[2] ^ buf3 ^ buf1; 00160 buf3 = state[3]^buf2; buf3=galois_mul2(buf3); state[3] = state[3] ^ buf3 ^ buf1; 00161 // col2 00162 buf1 = state[4] ^ state[5] ^ state[6] ^ state[7]; 00163 buf2 = state[4]; 00164 buf3 = state[4]^state[5]; buf3=galois_mul2(buf3); state[4] = state[4] ^ buf3 ^ buf1; 00165 buf3 = state[5]^state[6]; buf3=galois_mul2(buf3); state[5] = state[5] ^ buf3 ^ buf1; 00166 buf3 = state[6]^state[7]; buf3=galois_mul2(buf3); state[6] = state[6] ^ buf3 ^ buf1; 00167 buf3 = state[7]^buf2; buf3=galois_mul2(buf3); state[7] = state[7] ^ buf3 ^ buf1; 00168 // col3 00169 buf1 = state[8] ^ state[9] ^ state[10] ^ state[11]; 00170 buf2 = state[8]; 00171 buf3 = state[8]^state[9]; buf3=galois_mul2(buf3); state[8] = state[8] ^ buf3 ^ buf1; 00172 buf3 = state[9]^state[10]; buf3=galois_mul2(buf3); state[9] = state[9] ^ buf3 ^ buf1; 00173 buf3 = state[10]^state[11]; buf3=galois_mul2(buf3); state[10] = state[10] ^ buf3 ^ buf1; 00174 buf3 = state[11]^buf2; buf3=galois_mul2(buf3); state[11] = state[11] ^ buf3 ^ buf1; 00175 // col4 00176 buf1 = state[12] ^ state[13] ^ state[14] ^ state[15]; 00177 buf2 = state[12]; 00178 buf3 = state[12]^state[13]; buf3=galois_mul2(buf3); state[12] = state[12] ^ buf3 ^ buf1; 00179 buf3 = state[13]^state[14]; buf3=galois_mul2(buf3); state[13] = state[13] ^ buf3 ^ buf1; 00180 buf3 = state[14]^state[15]; buf3=galois_mul2(buf3); state[14] = state[14] ^ buf3 ^ buf1; 00181 buf3 = state[15]^buf2; buf3=galois_mul2(buf3); state[15] = state[15] ^ buf3 ^ buf1; 00182 00183 } 00184 // 10th round without mixcols 00185 state[ 0] = sbox[(state[ 0] ^ expanded_key[(round*16) ])]; 00186 state[ 4] = sbox[(state[ 4] ^ expanded_key[(round*16) + 4])]; 00187 state[ 8] = sbox[(state[ 8] ^ expanded_key[(round*16) + 8])]; 00188 state[12] = sbox[(state[12] ^ expanded_key[(round*16) + 12])]; 00189 // row 1 00190 buf1 = state[1] ^ expanded_key[(round*16) + 1]; 00191 state[ 1] = sbox[(state[ 5] ^ expanded_key[(round*16) + 5])]; 00192 state[ 5] = sbox[(state[ 9] ^ expanded_key[(round*16) + 9])]; 00193 state[ 9] = sbox[(state[13] ^ expanded_key[(round*16) + 13])]; 00194 state[13] = sbox[buf1]; 00195 // row 2 00196 buf1 = state[2] ^ expanded_key[(round*16) + 2]; 00197 buf2 = state[6] ^ expanded_key[(round*16) + 6]; 00198 state[ 2] = sbox[(state[10] ^ expanded_key[(round*16) + 10])]; 00199 state[ 6] = sbox[(state[14] ^ expanded_key[(round*16) + 14])]; 00200 state[10] = sbox[buf1]; 00201 state[14] = sbox[buf2]; 00202 // row 3 00203 buf1 = state[15] ^ expanded_key[(round*16) + 15]; 00204 state[15] = sbox[(state[11] ^ expanded_key[(round*16) + 11])]; 00205 state[11] = sbox[(state[ 7] ^ expanded_key[(round*16) + 7])]; 00206 state[ 7] = sbox[(state[ 3] ^ expanded_key[(round*16) + 3])]; 00207 state[ 3] = sbox[buf1]; 00208 // last addroundkey 00209 state[ 0]^=expanded_key[160]; 00210 state[ 1]^=expanded_key[161]; 00211 state[ 2]^=expanded_key[162]; 00212 state[ 3]^=expanded_key[163]; 00213 state[ 4]^=expanded_key[164]; 00214 state[ 5]^=expanded_key[165]; 00215 state[ 6]^=expanded_key[166]; 00216 state[ 7]^=expanded_key[167]; 00217 state[ 8]^=expanded_key[168]; 00218 state[ 9]^=expanded_key[169]; 00219 state[10]^=expanded_key[170]; 00220 state[11]^=expanded_key[171]; 00221 state[12]^=expanded_key[172]; 00222 state[13]^=expanded_key[173]; 00223 state[14]^=expanded_key[174]; 00224 state[15]^=expanded_key[175]; 00225 } 00226 00227 void cc3000_security::aes_decr(uint8_t *state, uint8_t *expanded_key) { 00228 uint8_t buf1, buf2, buf3; 00229 int8_t round; 00230 round = 9; 00231 00232 // initial addroundkey 00233 state[ 0]^=expanded_key[160]; 00234 state[ 1]^=expanded_key[161]; 00235 state[ 2]^=expanded_key[162]; 00236 state[ 3]^=expanded_key[163]; 00237 state[ 4]^=expanded_key[164]; 00238 state[ 5]^=expanded_key[165]; 00239 state[ 6]^=expanded_key[166]; 00240 state[ 7]^=expanded_key[167]; 00241 state[ 8]^=expanded_key[168]; 00242 state[ 9]^=expanded_key[169]; 00243 state[10]^=expanded_key[170]; 00244 state[11]^=expanded_key[171]; 00245 state[12]^=expanded_key[172]; 00246 state[13]^=expanded_key[173]; 00247 state[14]^=expanded_key[174]; 00248 state[15]^=expanded_key[175]; 00249 00250 // 10th round without mixcols 00251 state[ 0] = rsbox[state[ 0]] ^ expanded_key[(round*16) ]; 00252 state[ 4] = rsbox[state[ 4]] ^ expanded_key[(round*16) + 4]; 00253 state[ 8] = rsbox[state[ 8]] ^ expanded_key[(round*16) + 8]; 00254 state[12] = rsbox[state[12]] ^ expanded_key[(round*16) + 12]; 00255 // row 1 00256 buf1 = rsbox[state[13]] ^ expanded_key[(round*16) + 1]; 00257 state[13] = rsbox[state[ 9]] ^ expanded_key[(round*16) + 13]; 00258 state[ 9] = rsbox[state[ 5]] ^ expanded_key[(round*16) + 9]; 00259 state[ 5] = rsbox[state[ 1]] ^ expanded_key[(round*16) + 5]; 00260 state[ 1] = buf1; 00261 // row 2 00262 buf1 = rsbox[state[ 2]] ^ expanded_key[(round*16) + 10]; 00263 buf2 = rsbox[state[ 6]] ^ expanded_key[(round*16) + 14]; 00264 state[ 2] = rsbox[state[10]] ^ expanded_key[(round*16) + 2]; 00265 state[ 6] = rsbox[state[14]] ^ expanded_key[(round*16) + 6]; 00266 state[10] = buf1; 00267 state[14] = buf2; 00268 // row 3 00269 buf1 = rsbox[state[ 3]] ^ expanded_key[(round*16) + 15]; 00270 state[ 3] = rsbox[state[ 7]] ^ expanded_key[(round*16) + 3]; 00271 state[ 7] = rsbox[state[11]] ^ expanded_key[(round*16) + 7]; 00272 state[11] = rsbox[state[15]] ^ expanded_key[(round*16) + 11]; 00273 state[15] = buf1; 00274 00275 for (round = 8; round >= 0; round--) 00276 { 00277 // barreto 00278 //col1 00279 buf1 = galois_mul2(galois_mul2(state[0]^state[2])); 00280 buf2 = galois_mul2(galois_mul2(state[1]^state[3])); 00281 state[0] ^= buf1; state[1] ^= buf2; state[2] ^= buf1; state[3] ^= buf2; 00282 //col2 00283 buf1 = galois_mul2(galois_mul2(state[4]^state[6])); 00284 buf2 = galois_mul2(galois_mul2(state[5]^state[7])); 00285 state[4] ^= buf1; state[5] ^= buf2; state[6] ^= buf1; state[7] ^= buf2; 00286 //col3 00287 buf1 = galois_mul2(galois_mul2(state[8]^state[10])); 00288 buf2 = galois_mul2(galois_mul2(state[9]^state[11])); 00289 state[8] ^= buf1; state[9] ^= buf2; state[10] ^= buf1; state[11] ^= buf2; 00290 //col4 00291 buf1 = galois_mul2(galois_mul2(state[12]^state[14])); 00292 buf2 = galois_mul2(galois_mul2(state[13]^state[15])); 00293 state[12] ^= buf1; state[13] ^= buf2; state[14] ^= buf1; state[15] ^= buf2; 00294 // mixcolums ////////// 00295 // col1 00296 buf1 = state[0] ^ state[1] ^ state[2] ^ state[3]; 00297 buf2 = state[0]; 00298 buf3 = state[0]^state[1]; buf3=galois_mul2(buf3); state[0] = state[0] ^ buf3 ^ buf1; 00299 buf3 = state[1]^state[2]; buf3=galois_mul2(buf3); state[1] = state[1] ^ buf3 ^ buf1; 00300 buf3 = state[2]^state[3]; buf3=galois_mul2(buf3); state[2] = state[2] ^ buf3 ^ buf1; 00301 buf3 = state[3]^buf2; buf3=galois_mul2(buf3); state[3] = state[3] ^ buf3 ^ buf1; 00302 // col2 00303 buf1 = state[4] ^ state[5] ^ state[6] ^ state[7]; 00304 buf2 = state[4]; 00305 buf3 = state[4]^state[5]; buf3=galois_mul2(buf3); state[4] = state[4] ^ buf3 ^ buf1; 00306 buf3 = state[5]^state[6]; buf3=galois_mul2(buf3); state[5] = state[5] ^ buf3 ^ buf1; 00307 buf3 = state[6]^state[7]; buf3=galois_mul2(buf3); state[6] = state[6] ^ buf3 ^ buf1; 00308 buf3 = state[7]^buf2; buf3=galois_mul2(buf3); state[7] = state[7] ^ buf3 ^ buf1; 00309 // col3 00310 buf1 = state[8] ^ state[9] ^ state[10] ^ state[11]; 00311 buf2 = state[8]; 00312 buf3 = state[8]^state[9]; buf3=galois_mul2(buf3); state[8] = state[8] ^ buf3 ^ buf1; 00313 buf3 = state[9]^state[10]; buf3=galois_mul2(buf3); state[9] = state[9] ^ buf3 ^ buf1; 00314 buf3 = state[10]^state[11]; buf3=galois_mul2(buf3); state[10] = state[10] ^ buf3 ^ buf1; 00315 buf3 = state[11]^buf2; buf3=galois_mul2(buf3); state[11] = state[11] ^ buf3 ^ buf1; 00316 // col4 00317 buf1 = state[12] ^ state[13] ^ state[14] ^ state[15]; 00318 buf2 = state[12]; 00319 buf3 = state[12]^state[13]; buf3=galois_mul2(buf3); state[12] = state[12] ^ buf3 ^ buf1; 00320 buf3 = state[13]^state[14]; buf3=galois_mul2(buf3); state[13] = state[13] ^ buf3 ^ buf1; 00321 buf3 = state[14]^state[15]; buf3=galois_mul2(buf3); state[14] = state[14] ^ buf3 ^ buf1; 00322 buf3 = state[15]^buf2; buf3=galois_mul2(buf3); state[15] = state[15] ^ buf3 ^ buf1; 00323 00324 // addroundkey, rsbox and shiftrows 00325 // row 0 00326 state[ 0] = rsbox[state[ 0]] ^ expanded_key[(round*16) ]; 00327 state[ 4] = rsbox[state[ 4]] ^ expanded_key[(round*16) + 4]; 00328 state[ 8] = rsbox[state[ 8]] ^ expanded_key[(round*16) + 8]; 00329 state[12] = rsbox[state[12]] ^ expanded_key[(round*16) + 12]; 00330 // row 1 00331 buf1 = rsbox[state[13]] ^ expanded_key[(round*16) + 1]; 00332 state[13] = rsbox[state[ 9]] ^ expanded_key[(round*16) + 13]; 00333 state[ 9] = rsbox[state[ 5]] ^ expanded_key[(round*16) + 9]; 00334 state[ 5] = rsbox[state[ 1]] ^ expanded_key[(round*16) + 5]; 00335 state[ 1] = buf1; 00336 // row 2 00337 buf1 = rsbox[state[ 2]] ^ expanded_key[(round*16) + 10]; 00338 buf2 = rsbox[state[ 6]] ^ expanded_key[(round*16) + 14]; 00339 state[ 2] = rsbox[state[10]] ^ expanded_key[(round*16) + 2]; 00340 state[ 6] = rsbox[state[14]] ^ expanded_key[(round*16) + 6]; 00341 state[10] = buf1; 00342 state[14] = buf2; 00343 // row 3 00344 buf1 = rsbox[state[ 3]] ^ expanded_key[(round*16) + 15]; 00345 state[ 3] = rsbox[state[ 7]] ^ expanded_key[(round*16) + 3]; 00346 state[ 7] = rsbox[state[11]] ^ expanded_key[(round*16) + 7]; 00347 state[11] = rsbox[state[15]] ^ expanded_key[(round*16) + 11]; 00348 state[15] = buf1; 00349 } 00350 } 00351 00352 void cc3000_security::aes_encrypt(uint8_t *state, uint8_t *key) { 00353 // expand the key into 176 bytes 00354 expandKey(_expanded_key, key); 00355 aes_encr(state, _expanded_key); 00356 } 00357 00358 void cc3000_security::aes_decrypt(uint8_t *state, uint8_t *key) { 00359 expandKey(_expanded_key, key); // expand the key into 176 bytes 00360 aes_decr(state, _expanded_key); 00361 } 00362 00363 int32_t cc3000_security::aes_read_key(uint8_t *key) { 00364 int32_t returnValue; 00365 00366 returnValue = nvmem_read(NVMEM_AES128_KEY_FILEID, AES128_KEY_SIZE, 0, key); 00367 00368 return returnValue; 00369 } 00370 00371 int32_t cc3000_security::aes_write_key(uint8_t *key) { 00372 int32_t returnValue; 00373 00374 returnValue = nvmem_write(NVMEM_AES128_KEY_FILEID, AES128_KEY_SIZE, 0, key); 00375 00376 return returnValue; 00377 } 00378 #endif 00379 00380 } // mbed_cc3000 namespace 00381
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