David Fletcher
CC3000HostDriver for device TI CC3000 some changes were made due to mbed compiler and the use of void*
security.cpp@0:9cb694f00b7b, 2013-08-02 (annotated)
- Committer:
- dflet
- Date:
- Fri Aug 02 15:06:15 2013 +0000
- Revision:
- 0:9cb694f00b7b
First commit TI CC3000HostDriver library
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| dflet | 0:9cb694f00b7b | 1 | /***************************************************************************** |
| dflet | 0:9cb694f00b7b | 2 | * |
| dflet | 0:9cb694f00b7b | 3 | * security.c - CC3000 Host Driver Implementation. |
| dflet | 0:9cb694f00b7b | 4 | * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ |
| dflet | 0:9cb694f00b7b | 5 | * |
| dflet | 0:9cb694f00b7b | 6 | * Redistribution and use in source and binary forms, with or without |
| dflet | 0:9cb694f00b7b | 7 | * modification, are permitted provided that the following conditions |
| dflet | 0:9cb694f00b7b | 8 | * are met: |
| dflet | 0:9cb694f00b7b | 9 | * |
| dflet | 0:9cb694f00b7b | 10 | * Redistributions of source code must retain the above copyright |
| dflet | 0:9cb694f00b7b | 11 | * notice, this list of conditions and the following disclaimer. |
| dflet | 0:9cb694f00b7b | 12 | * |
| dflet | 0:9cb694f00b7b | 13 | * Redistributions in binary form must reproduce the above copyright |
| dflet | 0:9cb694f00b7b | 14 | * notice, this list of conditions and the following disclaimer in the |
| dflet | 0:9cb694f00b7b | 15 | * documentation and/or other materials provided with the |
| dflet | 0:9cb694f00b7b | 16 | * distribution. |
| dflet | 0:9cb694f00b7b | 17 | * |
| dflet | 0:9cb694f00b7b | 18 | * Neither the name of Texas Instruments Incorporated nor the names of |
| dflet | 0:9cb694f00b7b | 19 | * its contributors may be used to endorse or promote products derived |
| dflet | 0:9cb694f00b7b | 20 | * from this software without specific prior written permission. |
| dflet | 0:9cb694f00b7b | 21 | * |
| dflet | 0:9cb694f00b7b | 22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| dflet | 0:9cb694f00b7b | 23 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| dflet | 0:9cb694f00b7b | 24 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| dflet | 0:9cb694f00b7b | 25 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| dflet | 0:9cb694f00b7b | 26 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| dflet | 0:9cb694f00b7b | 27 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| dflet | 0:9cb694f00b7b | 28 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| dflet | 0:9cb694f00b7b | 29 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| dflet | 0:9cb694f00b7b | 30 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| dflet | 0:9cb694f00b7b | 31 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| dflet | 0:9cb694f00b7b | 32 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| dflet | 0:9cb694f00b7b | 33 | * |
| dflet | 0:9cb694f00b7b | 34 | *****************************************************************************/ |
| dflet | 0:9cb694f00b7b | 35 | |
| dflet | 0:9cb694f00b7b | 36 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 37 | // |
| dflet | 0:9cb694f00b7b | 38 | //! \addtogroup security_api |
| dflet | 0:9cb694f00b7b | 39 | //! @{ |
| dflet | 0:9cb694f00b7b | 40 | // |
| dflet | 0:9cb694f00b7b | 41 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 42 | |
| dflet | 0:9cb694f00b7b | 43 | #include "security.h" |
| dflet | 0:9cb694f00b7b | 44 | |
| dflet | 0:9cb694f00b7b | 45 | #ifndef CC3000_UNENCRYPTED_SMART_CONFIG |
| dflet | 0:9cb694f00b7b | 46 | // foreward sbox |
| dflet | 0:9cb694f00b7b | 47 | const unsigned char sbox[256] = { |
| dflet | 0:9cb694f00b7b | 48 | //0 1 2 3 4 5 6 7 8 9 A B C D E F |
| dflet | 0:9cb694f00b7b | 49 | 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, //0 |
| dflet | 0:9cb694f00b7b | 50 | 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, //1 |
| dflet | 0:9cb694f00b7b | 51 | 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, //2 |
| dflet | 0:9cb694f00b7b | 52 | 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, //3 |
| dflet | 0:9cb694f00b7b | 53 | 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, //4 |
| dflet | 0:9cb694f00b7b | 54 | 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, //5 |
| dflet | 0:9cb694f00b7b | 55 | 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, //6 |
| dflet | 0:9cb694f00b7b | 56 | 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, //7 |
| dflet | 0:9cb694f00b7b | 57 | 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, //8 |
| dflet | 0:9cb694f00b7b | 58 | 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, //9 |
| dflet | 0:9cb694f00b7b | 59 | 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, //A |
| dflet | 0:9cb694f00b7b | 60 | 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, //B |
| dflet | 0:9cb694f00b7b | 61 | 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, //C |
| dflet | 0:9cb694f00b7b | 62 | 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, //D |
| dflet | 0:9cb694f00b7b | 63 | 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, //E |
| dflet | 0:9cb694f00b7b | 64 | 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 }; //F |
| dflet | 0:9cb694f00b7b | 65 | // inverse sbox |
| dflet | 0:9cb694f00b7b | 66 | const unsigned char rsbox[256] = |
| dflet | 0:9cb694f00b7b | 67 | { 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb |
| dflet | 0:9cb694f00b7b | 68 | , 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb |
| dflet | 0:9cb694f00b7b | 69 | , 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e |
| dflet | 0:9cb694f00b7b | 70 | , 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25 |
| dflet | 0:9cb694f00b7b | 71 | , 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92 |
| dflet | 0:9cb694f00b7b | 72 | , 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84 |
| dflet | 0:9cb694f00b7b | 73 | , 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06 |
| dflet | 0:9cb694f00b7b | 74 | , 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b |
| dflet | 0:9cb694f00b7b | 75 | , 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73 |
| dflet | 0:9cb694f00b7b | 76 | , 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e |
| dflet | 0:9cb694f00b7b | 77 | , 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b |
| dflet | 0:9cb694f00b7b | 78 | , 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4 |
| dflet | 0:9cb694f00b7b | 79 | , 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f |
| dflet | 0:9cb694f00b7b | 80 | , 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef |
| dflet | 0:9cb694f00b7b | 81 | , 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61 |
| dflet | 0:9cb694f00b7b | 82 | , 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d }; |
| dflet | 0:9cb694f00b7b | 83 | // round constant |
| dflet | 0:9cb694f00b7b | 84 | const unsigned char Rcon[11] = { |
| dflet | 0:9cb694f00b7b | 85 | 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36}; |
| dflet | 0:9cb694f00b7b | 86 | |
| dflet | 0:9cb694f00b7b | 87 | |
| dflet | 0:9cb694f00b7b | 88 | unsigned char expandedKey[176]; |
| dflet | 0:9cb694f00b7b | 89 | |
| dflet | 0:9cb694f00b7b | 90 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 91 | // |
| dflet | 0:9cb694f00b7b | 92 | //! expandKey |
| dflet | 0:9cb694f00b7b | 93 | //! |
| dflet | 0:9cb694f00b7b | 94 | //! @param key AES128 key - 16 bytes |
| dflet | 0:9cb694f00b7b | 95 | //! @param expandedKey expanded AES128 key |
| dflet | 0:9cb694f00b7b | 96 | //! |
| dflet | 0:9cb694f00b7b | 97 | //! @return none |
| dflet | 0:9cb694f00b7b | 98 | //! |
| dflet | 0:9cb694f00b7b | 99 | //! @brief expend a 16 bytes key for AES128 implementation |
| dflet | 0:9cb694f00b7b | 100 | //! |
| dflet | 0:9cb694f00b7b | 101 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 102 | |
| dflet | 0:9cb694f00b7b | 103 | void expandKey(unsigned char *expandedKey, |
| dflet | 0:9cb694f00b7b | 104 | unsigned char *key) |
| dflet | 0:9cb694f00b7b | 105 | { |
| dflet | 0:9cb694f00b7b | 106 | unsigned short ii, buf1; |
| dflet | 0:9cb694f00b7b | 107 | for (ii=0;ii<16;ii++) |
| dflet | 0:9cb694f00b7b | 108 | expandedKey[ii] = key[ii]; |
| dflet | 0:9cb694f00b7b | 109 | for (ii=1;ii<11;ii++){ |
| dflet | 0:9cb694f00b7b | 110 | buf1 = expandedKey[ii*16 - 4]; |
| dflet | 0:9cb694f00b7b | 111 | expandedKey[ii*16 + 0] = sbox[expandedKey[ii*16 - 3]]^expandedKey[(ii-1)*16 + 0]^Rcon[ii]; |
| dflet | 0:9cb694f00b7b | 112 | expandedKey[ii*16 + 1] = sbox[expandedKey[ii*16 - 2]]^expandedKey[(ii-1)*16 + 1]; |
| dflet | 0:9cb694f00b7b | 113 | expandedKey[ii*16 + 2] = sbox[expandedKey[ii*16 - 1]]^expandedKey[(ii-1)*16 + 2]; |
| dflet | 0:9cb694f00b7b | 114 | expandedKey[ii*16 + 3] = sbox[buf1 ]^expandedKey[(ii-1)*16 + 3]; |
| dflet | 0:9cb694f00b7b | 115 | expandedKey[ii*16 + 4] = expandedKey[(ii-1)*16 + 4]^expandedKey[ii*16 + 0]; |
| dflet | 0:9cb694f00b7b | 116 | expandedKey[ii*16 + 5] = expandedKey[(ii-1)*16 + 5]^expandedKey[ii*16 + 1]; |
| dflet | 0:9cb694f00b7b | 117 | expandedKey[ii*16 + 6] = expandedKey[(ii-1)*16 + 6]^expandedKey[ii*16 + 2]; |
| dflet | 0:9cb694f00b7b | 118 | expandedKey[ii*16 + 7] = expandedKey[(ii-1)*16 + 7]^expandedKey[ii*16 + 3]; |
| dflet | 0:9cb694f00b7b | 119 | expandedKey[ii*16 + 8] = expandedKey[(ii-1)*16 + 8]^expandedKey[ii*16 + 4]; |
| dflet | 0:9cb694f00b7b | 120 | expandedKey[ii*16 + 9] = expandedKey[(ii-1)*16 + 9]^expandedKey[ii*16 + 5]; |
| dflet | 0:9cb694f00b7b | 121 | expandedKey[ii*16 +10] = expandedKey[(ii-1)*16 +10]^expandedKey[ii*16 + 6]; |
| dflet | 0:9cb694f00b7b | 122 | expandedKey[ii*16 +11] = expandedKey[(ii-1)*16 +11]^expandedKey[ii*16 + 7]; |
| dflet | 0:9cb694f00b7b | 123 | expandedKey[ii*16 +12] = expandedKey[(ii-1)*16 +12]^expandedKey[ii*16 + 8]; |
| dflet | 0:9cb694f00b7b | 124 | expandedKey[ii*16 +13] = expandedKey[(ii-1)*16 +13]^expandedKey[ii*16 + 9]; |
| dflet | 0:9cb694f00b7b | 125 | expandedKey[ii*16 +14] = expandedKey[(ii-1)*16 +14]^expandedKey[ii*16 +10]; |
| dflet | 0:9cb694f00b7b | 126 | expandedKey[ii*16 +15] = expandedKey[(ii-1)*16 +15]^expandedKey[ii*16 +11]; |
| dflet | 0:9cb694f00b7b | 127 | } |
| dflet | 0:9cb694f00b7b | 128 | |
| dflet | 0:9cb694f00b7b | 129 | } |
| dflet | 0:9cb694f00b7b | 130 | |
| dflet | 0:9cb694f00b7b | 131 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 132 | // |
| dflet | 0:9cb694f00b7b | 133 | //! galois_mul2 |
| dflet | 0:9cb694f00b7b | 134 | //! |
| dflet | 0:9cb694f00b7b | 135 | //! @param value argument to multiply |
| dflet | 0:9cb694f00b7b | 136 | //! |
| dflet | 0:9cb694f00b7b | 137 | //! @return multiplied argument |
| dflet | 0:9cb694f00b7b | 138 | //! |
| dflet | 0:9cb694f00b7b | 139 | //! @brief multiply by 2 in the galois field |
| dflet | 0:9cb694f00b7b | 140 | //! |
| dflet | 0:9cb694f00b7b | 141 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 142 | |
| dflet | 0:9cb694f00b7b | 143 | unsigned char galois_mul2(unsigned char value) |
| dflet | 0:9cb694f00b7b | 144 | { |
| dflet | 0:9cb694f00b7b | 145 | if (value>>7) |
| dflet | 0:9cb694f00b7b | 146 | { |
| dflet | 0:9cb694f00b7b | 147 | value = value << 1; |
| dflet | 0:9cb694f00b7b | 148 | return (value^0x1b); |
| dflet | 0:9cb694f00b7b | 149 | } else |
| dflet | 0:9cb694f00b7b | 150 | return value<<1; |
| dflet | 0:9cb694f00b7b | 151 | } |
| dflet | 0:9cb694f00b7b | 152 | |
| dflet | 0:9cb694f00b7b | 153 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 154 | // |
| dflet | 0:9cb694f00b7b | 155 | //! aes_encr |
| dflet | 0:9cb694f00b7b | 156 | //! |
| dflet | 0:9cb694f00b7b | 157 | //! @param[in] expandedKey expanded AES128 key |
| dflet | 0:9cb694f00b7b | 158 | //! @param[in/out] state 16 bytes of plain text and cipher text |
| dflet | 0:9cb694f00b7b | 159 | //! |
| dflet | 0:9cb694f00b7b | 160 | //! @return none |
| dflet | 0:9cb694f00b7b | 161 | //! |
| dflet | 0:9cb694f00b7b | 162 | //! @brief internal implementation of AES128 encryption. |
| dflet | 0:9cb694f00b7b | 163 | //! straight forward aes encryption implementation |
| dflet | 0:9cb694f00b7b | 164 | //! first the group of operations |
| dflet | 0:9cb694f00b7b | 165 | //! - addRoundKey |
| dflet | 0:9cb694f00b7b | 166 | //! - subbytes |
| dflet | 0:9cb694f00b7b | 167 | //! - shiftrows |
| dflet | 0:9cb694f00b7b | 168 | //! - mixcolums |
| dflet | 0:9cb694f00b7b | 169 | //! is executed 9 times, after this addroundkey to finish the 9th |
| dflet | 0:9cb694f00b7b | 170 | //! round, after that the 10th round without mixcolums |
| dflet | 0:9cb694f00b7b | 171 | //! no further subfunctions to save cycles for function calls |
| dflet | 0:9cb694f00b7b | 172 | //! no structuring with "for (....)" to save cycles. |
| dflet | 0:9cb694f00b7b | 173 | //! |
| dflet | 0:9cb694f00b7b | 174 | //! |
| dflet | 0:9cb694f00b7b | 175 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 176 | |
| dflet | 0:9cb694f00b7b | 177 | void aes_encr(unsigned char *state, unsigned char *expandedKey) |
| dflet | 0:9cb694f00b7b | 178 | { |
| dflet | 0:9cb694f00b7b | 179 | unsigned char buf1, buf2, buf3, round; |
| dflet | 0:9cb694f00b7b | 180 | |
| dflet | 0:9cb694f00b7b | 181 | for (round = 0; round < 9; round ++){ |
| dflet | 0:9cb694f00b7b | 182 | // addroundkey, sbox and shiftrows |
| dflet | 0:9cb694f00b7b | 183 | // row 0 |
| dflet | 0:9cb694f00b7b | 184 | state[ 0] = sbox[(state[ 0] ^ expandedKey[(round*16) ])]; |
| dflet | 0:9cb694f00b7b | 185 | state[ 4] = sbox[(state[ 4] ^ expandedKey[(round*16) + 4])]; |
| dflet | 0:9cb694f00b7b | 186 | state[ 8] = sbox[(state[ 8] ^ expandedKey[(round*16) + 8])]; |
| dflet | 0:9cb694f00b7b | 187 | state[12] = sbox[(state[12] ^ expandedKey[(round*16) + 12])]; |
| dflet | 0:9cb694f00b7b | 188 | // row 1 |
| dflet | 0:9cb694f00b7b | 189 | buf1 = state[1] ^ expandedKey[(round*16) + 1]; |
| dflet | 0:9cb694f00b7b | 190 | state[ 1] = sbox[(state[ 5] ^ expandedKey[(round*16) + 5])]; |
| dflet | 0:9cb694f00b7b | 191 | state[ 5] = sbox[(state[ 9] ^ expandedKey[(round*16) + 9])]; |
| dflet | 0:9cb694f00b7b | 192 | state[ 9] = sbox[(state[13] ^ expandedKey[(round*16) + 13])]; |
| dflet | 0:9cb694f00b7b | 193 | state[13] = sbox[buf1]; |
| dflet | 0:9cb694f00b7b | 194 | // row 2 |
| dflet | 0:9cb694f00b7b | 195 | buf1 = state[2] ^ expandedKey[(round*16) + 2]; |
| dflet | 0:9cb694f00b7b | 196 | buf2 = state[6] ^ expandedKey[(round*16) + 6]; |
| dflet | 0:9cb694f00b7b | 197 | state[ 2] = sbox[(state[10] ^ expandedKey[(round*16) + 10])]; |
| dflet | 0:9cb694f00b7b | 198 | state[ 6] = sbox[(state[14] ^ expandedKey[(round*16) + 14])]; |
| dflet | 0:9cb694f00b7b | 199 | state[10] = sbox[buf1]; |
| dflet | 0:9cb694f00b7b | 200 | state[14] = sbox[buf2]; |
| dflet | 0:9cb694f00b7b | 201 | // row 3 |
| dflet | 0:9cb694f00b7b | 202 | buf1 = state[15] ^ expandedKey[(round*16) + 15]; |
| dflet | 0:9cb694f00b7b | 203 | state[15] = sbox[(state[11] ^ expandedKey[(round*16) + 11])]; |
| dflet | 0:9cb694f00b7b | 204 | state[11] = sbox[(state[ 7] ^ expandedKey[(round*16) + 7])]; |
| dflet | 0:9cb694f00b7b | 205 | state[ 7] = sbox[(state[ 3] ^ expandedKey[(round*16) + 3])]; |
| dflet | 0:9cb694f00b7b | 206 | state[ 3] = sbox[buf1]; |
| dflet | 0:9cb694f00b7b | 207 | |
| dflet | 0:9cb694f00b7b | 208 | // mixcolums ////////// |
| dflet | 0:9cb694f00b7b | 209 | // col1 |
| dflet | 0:9cb694f00b7b | 210 | buf1 = state[0] ^ state[1] ^ state[2] ^ state[3]; |
| dflet | 0:9cb694f00b7b | 211 | buf2 = state[0]; |
| dflet | 0:9cb694f00b7b | 212 | buf3 = state[0]^state[1]; buf3=galois_mul2(buf3); state[0] = state[0] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 213 | buf3 = state[1]^state[2]; buf3=galois_mul2(buf3); state[1] = state[1] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 214 | buf3 = state[2]^state[3]; buf3=galois_mul2(buf3); state[2] = state[2] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 215 | buf3 = state[3]^buf2; buf3=galois_mul2(buf3); state[3] = state[3] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 216 | // col2 |
| dflet | 0:9cb694f00b7b | 217 | buf1 = state[4] ^ state[5] ^ state[6] ^ state[7]; |
| dflet | 0:9cb694f00b7b | 218 | buf2 = state[4]; |
| dflet | 0:9cb694f00b7b | 219 | buf3 = state[4]^state[5]; buf3=galois_mul2(buf3); state[4] = state[4] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 220 | buf3 = state[5]^state[6]; buf3=galois_mul2(buf3); state[5] = state[5] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 221 | buf3 = state[6]^state[7]; buf3=galois_mul2(buf3); state[6] = state[6] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 222 | buf3 = state[7]^buf2; buf3=galois_mul2(buf3); state[7] = state[7] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 223 | // col3 |
| dflet | 0:9cb694f00b7b | 224 | buf1 = state[8] ^ state[9] ^ state[10] ^ state[11]; |
| dflet | 0:9cb694f00b7b | 225 | buf2 = state[8]; |
| dflet | 0:9cb694f00b7b | 226 | buf3 = state[8]^state[9]; buf3=galois_mul2(buf3); state[8] = state[8] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 227 | buf3 = state[9]^state[10]; buf3=galois_mul2(buf3); state[9] = state[9] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 228 | buf3 = state[10]^state[11]; buf3=galois_mul2(buf3); state[10] = state[10] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 229 | buf3 = state[11]^buf2; buf3=galois_mul2(buf3); state[11] = state[11] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 230 | // col4 |
| dflet | 0:9cb694f00b7b | 231 | buf1 = state[12] ^ state[13] ^ state[14] ^ state[15]; |
| dflet | 0:9cb694f00b7b | 232 | buf2 = state[12]; |
| dflet | 0:9cb694f00b7b | 233 | buf3 = state[12]^state[13]; buf3=galois_mul2(buf3); state[12] = state[12] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 234 | buf3 = state[13]^state[14]; buf3=galois_mul2(buf3); state[13] = state[13] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 235 | buf3 = state[14]^state[15]; buf3=galois_mul2(buf3); state[14] = state[14] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 236 | buf3 = state[15]^buf2; buf3=galois_mul2(buf3); state[15] = state[15] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 237 | |
| dflet | 0:9cb694f00b7b | 238 | } |
| dflet | 0:9cb694f00b7b | 239 | // 10th round without mixcols |
| dflet | 0:9cb694f00b7b | 240 | state[ 0] = sbox[(state[ 0] ^ expandedKey[(round*16) ])]; |
| dflet | 0:9cb694f00b7b | 241 | state[ 4] = sbox[(state[ 4] ^ expandedKey[(round*16) + 4])]; |
| dflet | 0:9cb694f00b7b | 242 | state[ 8] = sbox[(state[ 8] ^ expandedKey[(round*16) + 8])]; |
| dflet | 0:9cb694f00b7b | 243 | state[12] = sbox[(state[12] ^ expandedKey[(round*16) + 12])]; |
| dflet | 0:9cb694f00b7b | 244 | // row 1 |
| dflet | 0:9cb694f00b7b | 245 | buf1 = state[1] ^ expandedKey[(round*16) + 1]; |
| dflet | 0:9cb694f00b7b | 246 | state[ 1] = sbox[(state[ 5] ^ expandedKey[(round*16) + 5])]; |
| dflet | 0:9cb694f00b7b | 247 | state[ 5] = sbox[(state[ 9] ^ expandedKey[(round*16) + 9])]; |
| dflet | 0:9cb694f00b7b | 248 | state[ 9] = sbox[(state[13] ^ expandedKey[(round*16) + 13])]; |
| dflet | 0:9cb694f00b7b | 249 | state[13] = sbox[buf1]; |
| dflet | 0:9cb694f00b7b | 250 | // row 2 |
| dflet | 0:9cb694f00b7b | 251 | buf1 = state[2] ^ expandedKey[(round*16) + 2]; |
| dflet | 0:9cb694f00b7b | 252 | buf2 = state[6] ^ expandedKey[(round*16) + 6]; |
| dflet | 0:9cb694f00b7b | 253 | state[ 2] = sbox[(state[10] ^ expandedKey[(round*16) + 10])]; |
| dflet | 0:9cb694f00b7b | 254 | state[ 6] = sbox[(state[14] ^ expandedKey[(round*16) + 14])]; |
| dflet | 0:9cb694f00b7b | 255 | state[10] = sbox[buf1]; |
| dflet | 0:9cb694f00b7b | 256 | state[14] = sbox[buf2]; |
| dflet | 0:9cb694f00b7b | 257 | // row 3 |
| dflet | 0:9cb694f00b7b | 258 | buf1 = state[15] ^ expandedKey[(round*16) + 15]; |
| dflet | 0:9cb694f00b7b | 259 | state[15] = sbox[(state[11] ^ expandedKey[(round*16) + 11])]; |
| dflet | 0:9cb694f00b7b | 260 | state[11] = sbox[(state[ 7] ^ expandedKey[(round*16) + 7])]; |
| dflet | 0:9cb694f00b7b | 261 | state[ 7] = sbox[(state[ 3] ^ expandedKey[(round*16) + 3])]; |
| dflet | 0:9cb694f00b7b | 262 | state[ 3] = sbox[buf1]; |
| dflet | 0:9cb694f00b7b | 263 | // last addroundkey |
| dflet | 0:9cb694f00b7b | 264 | state[ 0]^=expandedKey[160]; |
| dflet | 0:9cb694f00b7b | 265 | state[ 1]^=expandedKey[161]; |
| dflet | 0:9cb694f00b7b | 266 | state[ 2]^=expandedKey[162]; |
| dflet | 0:9cb694f00b7b | 267 | state[ 3]^=expandedKey[163]; |
| dflet | 0:9cb694f00b7b | 268 | state[ 4]^=expandedKey[164]; |
| dflet | 0:9cb694f00b7b | 269 | state[ 5]^=expandedKey[165]; |
| dflet | 0:9cb694f00b7b | 270 | state[ 6]^=expandedKey[166]; |
| dflet | 0:9cb694f00b7b | 271 | state[ 7]^=expandedKey[167]; |
| dflet | 0:9cb694f00b7b | 272 | state[ 8]^=expandedKey[168]; |
| dflet | 0:9cb694f00b7b | 273 | state[ 9]^=expandedKey[169]; |
| dflet | 0:9cb694f00b7b | 274 | state[10]^=expandedKey[170]; |
| dflet | 0:9cb694f00b7b | 275 | state[11]^=expandedKey[171]; |
| dflet | 0:9cb694f00b7b | 276 | state[12]^=expandedKey[172]; |
| dflet | 0:9cb694f00b7b | 277 | state[13]^=expandedKey[173]; |
| dflet | 0:9cb694f00b7b | 278 | state[14]^=expandedKey[174]; |
| dflet | 0:9cb694f00b7b | 279 | state[15]^=expandedKey[175]; |
| dflet | 0:9cb694f00b7b | 280 | } |
| dflet | 0:9cb694f00b7b | 281 | |
| dflet | 0:9cb694f00b7b | 282 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 283 | // |
| dflet | 0:9cb694f00b7b | 284 | //! aes_decr |
| dflet | 0:9cb694f00b7b | 285 | //! |
| dflet | 0:9cb694f00b7b | 286 | //! @param[in] expandedKey expanded AES128 key |
| dflet | 0:9cb694f00b7b | 287 | //! @param[in\out] state 16 bytes of cipher text and plain text |
| dflet | 0:9cb694f00b7b | 288 | //! |
| dflet | 0:9cb694f00b7b | 289 | //! @return none |
| dflet | 0:9cb694f00b7b | 290 | //! |
| dflet | 0:9cb694f00b7b | 291 | //! @brief internal implementation of AES128 decryption. |
| dflet | 0:9cb694f00b7b | 292 | //! straight forward aes decryption implementation |
| dflet | 0:9cb694f00b7b | 293 | //! the order of substeps is the exact reverse of decryption |
| dflet | 0:9cb694f00b7b | 294 | //! inverse functions: |
| dflet | 0:9cb694f00b7b | 295 | //! - addRoundKey is its own inverse |
| dflet | 0:9cb694f00b7b | 296 | //! - rsbox is inverse of sbox |
| dflet | 0:9cb694f00b7b | 297 | //! - rightshift instead of leftshift |
| dflet | 0:9cb694f00b7b | 298 | //! - invMixColumns = barreto + mixColumns |
| dflet | 0:9cb694f00b7b | 299 | //! no further subfunctions to save cycles for function calls |
| dflet | 0:9cb694f00b7b | 300 | //! no structuring with "for (....)" to save cycles |
| dflet | 0:9cb694f00b7b | 301 | //! |
| dflet | 0:9cb694f00b7b | 302 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 303 | |
| dflet | 0:9cb694f00b7b | 304 | void aes_decr(unsigned char *state, unsigned char *expandedKey) |
| dflet | 0:9cb694f00b7b | 305 | { |
| dflet | 0:9cb694f00b7b | 306 | unsigned char buf1, buf2, buf3; |
| dflet | 0:9cb694f00b7b | 307 | signed char round; |
| dflet | 0:9cb694f00b7b | 308 | round = 9; |
| dflet | 0:9cb694f00b7b | 309 | |
| dflet | 0:9cb694f00b7b | 310 | // initial addroundkey |
| dflet | 0:9cb694f00b7b | 311 | state[ 0]^=expandedKey[160]; |
| dflet | 0:9cb694f00b7b | 312 | state[ 1]^=expandedKey[161]; |
| dflet | 0:9cb694f00b7b | 313 | state[ 2]^=expandedKey[162]; |
| dflet | 0:9cb694f00b7b | 314 | state[ 3]^=expandedKey[163]; |
| dflet | 0:9cb694f00b7b | 315 | state[ 4]^=expandedKey[164]; |
| dflet | 0:9cb694f00b7b | 316 | state[ 5]^=expandedKey[165]; |
| dflet | 0:9cb694f00b7b | 317 | state[ 6]^=expandedKey[166]; |
| dflet | 0:9cb694f00b7b | 318 | state[ 7]^=expandedKey[167]; |
| dflet | 0:9cb694f00b7b | 319 | state[ 8]^=expandedKey[168]; |
| dflet | 0:9cb694f00b7b | 320 | state[ 9]^=expandedKey[169]; |
| dflet | 0:9cb694f00b7b | 321 | state[10]^=expandedKey[170]; |
| dflet | 0:9cb694f00b7b | 322 | state[11]^=expandedKey[171]; |
| dflet | 0:9cb694f00b7b | 323 | state[12]^=expandedKey[172]; |
| dflet | 0:9cb694f00b7b | 324 | state[13]^=expandedKey[173]; |
| dflet | 0:9cb694f00b7b | 325 | state[14]^=expandedKey[174]; |
| dflet | 0:9cb694f00b7b | 326 | state[15]^=expandedKey[175]; |
| dflet | 0:9cb694f00b7b | 327 | |
| dflet | 0:9cb694f00b7b | 328 | // 10th round without mixcols |
| dflet | 0:9cb694f00b7b | 329 | state[ 0] = rsbox[state[ 0]] ^ expandedKey[(round*16) ]; |
| dflet | 0:9cb694f00b7b | 330 | state[ 4] = rsbox[state[ 4]] ^ expandedKey[(round*16) + 4]; |
| dflet | 0:9cb694f00b7b | 331 | state[ 8] = rsbox[state[ 8]] ^ expandedKey[(round*16) + 8]; |
| dflet | 0:9cb694f00b7b | 332 | state[12] = rsbox[state[12]] ^ expandedKey[(round*16) + 12]; |
| dflet | 0:9cb694f00b7b | 333 | // row 1 |
| dflet | 0:9cb694f00b7b | 334 | buf1 = rsbox[state[13]] ^ expandedKey[(round*16) + 1]; |
| dflet | 0:9cb694f00b7b | 335 | state[13] = rsbox[state[ 9]] ^ expandedKey[(round*16) + 13]; |
| dflet | 0:9cb694f00b7b | 336 | state[ 9] = rsbox[state[ 5]] ^ expandedKey[(round*16) + 9]; |
| dflet | 0:9cb694f00b7b | 337 | state[ 5] = rsbox[state[ 1]] ^ expandedKey[(round*16) + 5]; |
| dflet | 0:9cb694f00b7b | 338 | state[ 1] = buf1; |
| dflet | 0:9cb694f00b7b | 339 | // row 2 |
| dflet | 0:9cb694f00b7b | 340 | buf1 = rsbox[state[ 2]] ^ expandedKey[(round*16) + 10]; |
| dflet | 0:9cb694f00b7b | 341 | buf2 = rsbox[state[ 6]] ^ expandedKey[(round*16) + 14]; |
| dflet | 0:9cb694f00b7b | 342 | state[ 2] = rsbox[state[10]] ^ expandedKey[(round*16) + 2]; |
| dflet | 0:9cb694f00b7b | 343 | state[ 6] = rsbox[state[14]] ^ expandedKey[(round*16) + 6]; |
| dflet | 0:9cb694f00b7b | 344 | state[10] = buf1; |
| dflet | 0:9cb694f00b7b | 345 | state[14] = buf2; |
| dflet | 0:9cb694f00b7b | 346 | // row 3 |
| dflet | 0:9cb694f00b7b | 347 | buf1 = rsbox[state[ 3]] ^ expandedKey[(round*16) + 15]; |
| dflet | 0:9cb694f00b7b | 348 | state[ 3] = rsbox[state[ 7]] ^ expandedKey[(round*16) + 3]; |
| dflet | 0:9cb694f00b7b | 349 | state[ 7] = rsbox[state[11]] ^ expandedKey[(round*16) + 7]; |
| dflet | 0:9cb694f00b7b | 350 | state[11] = rsbox[state[15]] ^ expandedKey[(round*16) + 11]; |
| dflet | 0:9cb694f00b7b | 351 | state[15] = buf1; |
| dflet | 0:9cb694f00b7b | 352 | |
| dflet | 0:9cb694f00b7b | 353 | for (round = 8; round >= 0; round--){ |
| dflet | 0:9cb694f00b7b | 354 | // barreto |
| dflet | 0:9cb694f00b7b | 355 | //col1 |
| dflet | 0:9cb694f00b7b | 356 | buf1 = galois_mul2(galois_mul2(state[0]^state[2])); |
| dflet | 0:9cb694f00b7b | 357 | buf2 = galois_mul2(galois_mul2(state[1]^state[3])); |
| dflet | 0:9cb694f00b7b | 358 | state[0] ^= buf1; state[1] ^= buf2; state[2] ^= buf1; state[3] ^= buf2; |
| dflet | 0:9cb694f00b7b | 359 | //col2 |
| dflet | 0:9cb694f00b7b | 360 | buf1 = galois_mul2(galois_mul2(state[4]^state[6])); |
| dflet | 0:9cb694f00b7b | 361 | buf2 = galois_mul2(galois_mul2(state[5]^state[7])); |
| dflet | 0:9cb694f00b7b | 362 | state[4] ^= buf1; state[5] ^= buf2; state[6] ^= buf1; state[7] ^= buf2; |
| dflet | 0:9cb694f00b7b | 363 | //col3 |
| dflet | 0:9cb694f00b7b | 364 | buf1 = galois_mul2(galois_mul2(state[8]^state[10])); |
| dflet | 0:9cb694f00b7b | 365 | buf2 = galois_mul2(galois_mul2(state[9]^state[11])); |
| dflet | 0:9cb694f00b7b | 366 | state[8] ^= buf1; state[9] ^= buf2; state[10] ^= buf1; state[11] ^= buf2; |
| dflet | 0:9cb694f00b7b | 367 | //col4 |
| dflet | 0:9cb694f00b7b | 368 | buf1 = galois_mul2(galois_mul2(state[12]^state[14])); |
| dflet | 0:9cb694f00b7b | 369 | buf2 = galois_mul2(galois_mul2(state[13]^state[15])); |
| dflet | 0:9cb694f00b7b | 370 | state[12] ^= buf1; state[13] ^= buf2; state[14] ^= buf1; state[15] ^= buf2; |
| dflet | 0:9cb694f00b7b | 371 | // mixcolums ////////// |
| dflet | 0:9cb694f00b7b | 372 | // col1 |
| dflet | 0:9cb694f00b7b | 373 | buf1 = state[0] ^ state[1] ^ state[2] ^ state[3]; |
| dflet | 0:9cb694f00b7b | 374 | buf2 = state[0]; |
| dflet | 0:9cb694f00b7b | 375 | buf3 = state[0]^state[1]; buf3=galois_mul2(buf3); state[0] = state[0] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 376 | buf3 = state[1]^state[2]; buf3=galois_mul2(buf3); state[1] = state[1] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 377 | buf3 = state[2]^state[3]; buf3=galois_mul2(buf3); state[2] = state[2] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 378 | buf3 = state[3]^buf2; buf3=galois_mul2(buf3); state[3] = state[3] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 379 | // col2 |
| dflet | 0:9cb694f00b7b | 380 | buf1 = state[4] ^ state[5] ^ state[6] ^ state[7]; |
| dflet | 0:9cb694f00b7b | 381 | buf2 = state[4]; |
| dflet | 0:9cb694f00b7b | 382 | buf3 = state[4]^state[5]; buf3=galois_mul2(buf3); state[4] = state[4] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 383 | buf3 = state[5]^state[6]; buf3=galois_mul2(buf3); state[5] = state[5] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 384 | buf3 = state[6]^state[7]; buf3=galois_mul2(buf3); state[6] = state[6] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 385 | buf3 = state[7]^buf2; buf3=galois_mul2(buf3); state[7] = state[7] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 386 | // col3 |
| dflet | 0:9cb694f00b7b | 387 | buf1 = state[8] ^ state[9] ^ state[10] ^ state[11]; |
| dflet | 0:9cb694f00b7b | 388 | buf2 = state[8]; |
| dflet | 0:9cb694f00b7b | 389 | buf3 = state[8]^state[9]; buf3=galois_mul2(buf3); state[8] = state[8] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 390 | buf3 = state[9]^state[10]; buf3=galois_mul2(buf3); state[9] = state[9] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 391 | buf3 = state[10]^state[11]; buf3=galois_mul2(buf3); state[10] = state[10] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 392 | buf3 = state[11]^buf2; buf3=galois_mul2(buf3); state[11] = state[11] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 393 | // col4 |
| dflet | 0:9cb694f00b7b | 394 | buf1 = state[12] ^ state[13] ^ state[14] ^ state[15]; |
| dflet | 0:9cb694f00b7b | 395 | buf2 = state[12]; |
| dflet | 0:9cb694f00b7b | 396 | buf3 = state[12]^state[13]; buf3=galois_mul2(buf3); state[12] = state[12] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 397 | buf3 = state[13]^state[14]; buf3=galois_mul2(buf3); state[13] = state[13] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 398 | buf3 = state[14]^state[15]; buf3=galois_mul2(buf3); state[14] = state[14] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 399 | buf3 = state[15]^buf2; buf3=galois_mul2(buf3); state[15] = state[15] ^ buf3 ^ buf1; |
| dflet | 0:9cb694f00b7b | 400 | |
| dflet | 0:9cb694f00b7b | 401 | // addroundkey, rsbox and shiftrows |
| dflet | 0:9cb694f00b7b | 402 | // row 0 |
| dflet | 0:9cb694f00b7b | 403 | state[ 0] = rsbox[state[ 0]] ^ expandedKey[(round*16) ]; |
| dflet | 0:9cb694f00b7b | 404 | state[ 4] = rsbox[state[ 4]] ^ expandedKey[(round*16) + 4]; |
| dflet | 0:9cb694f00b7b | 405 | state[ 8] = rsbox[state[ 8]] ^ expandedKey[(round*16) + 8]; |
| dflet | 0:9cb694f00b7b | 406 | state[12] = rsbox[state[12]] ^ expandedKey[(round*16) + 12]; |
| dflet | 0:9cb694f00b7b | 407 | // row 1 |
| dflet | 0:9cb694f00b7b | 408 | buf1 = rsbox[state[13]] ^ expandedKey[(round*16) + 1]; |
| dflet | 0:9cb694f00b7b | 409 | state[13] = rsbox[state[ 9]] ^ expandedKey[(round*16) + 13]; |
| dflet | 0:9cb694f00b7b | 410 | state[ 9] = rsbox[state[ 5]] ^ expandedKey[(round*16) + 9]; |
| dflet | 0:9cb694f00b7b | 411 | state[ 5] = rsbox[state[ 1]] ^ expandedKey[(round*16) + 5]; |
| dflet | 0:9cb694f00b7b | 412 | state[ 1] = buf1; |
| dflet | 0:9cb694f00b7b | 413 | // row 2 |
| dflet | 0:9cb694f00b7b | 414 | buf1 = rsbox[state[ 2]] ^ expandedKey[(round*16) + 10]; |
| dflet | 0:9cb694f00b7b | 415 | buf2 = rsbox[state[ 6]] ^ expandedKey[(round*16) + 14]; |
| dflet | 0:9cb694f00b7b | 416 | state[ 2] = rsbox[state[10]] ^ expandedKey[(round*16) + 2]; |
| dflet | 0:9cb694f00b7b | 417 | state[ 6] = rsbox[state[14]] ^ expandedKey[(round*16) + 6]; |
| dflet | 0:9cb694f00b7b | 418 | state[10] = buf1; |
| dflet | 0:9cb694f00b7b | 419 | state[14] = buf2; |
| dflet | 0:9cb694f00b7b | 420 | // row 3 |
| dflet | 0:9cb694f00b7b | 421 | buf1 = rsbox[state[ 3]] ^ expandedKey[(round*16) + 15]; |
| dflet | 0:9cb694f00b7b | 422 | state[ 3] = rsbox[state[ 7]] ^ expandedKey[(round*16) + 3]; |
| dflet | 0:9cb694f00b7b | 423 | state[ 7] = rsbox[state[11]] ^ expandedKey[(round*16) + 7]; |
| dflet | 0:9cb694f00b7b | 424 | state[11] = rsbox[state[15]] ^ expandedKey[(round*16) + 11]; |
| dflet | 0:9cb694f00b7b | 425 | state[15] = buf1; |
| dflet | 0:9cb694f00b7b | 426 | } |
| dflet | 0:9cb694f00b7b | 427 | |
| dflet | 0:9cb694f00b7b | 428 | } |
| dflet | 0:9cb694f00b7b | 429 | |
| dflet | 0:9cb694f00b7b | 430 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 431 | // |
| dflet | 0:9cb694f00b7b | 432 | //! aes_encrypt |
| dflet | 0:9cb694f00b7b | 433 | //! |
| dflet | 0:9cb694f00b7b | 434 | //! @param[in] key AES128 key of size 16 bytes |
| dflet | 0:9cb694f00b7b | 435 | //! @param[in\out] state 16 bytes of plain text and cipher text |
| dflet | 0:9cb694f00b7b | 436 | //! |
| dflet | 0:9cb694f00b7b | 437 | //! @return none |
| dflet | 0:9cb694f00b7b | 438 | //! |
| dflet | 0:9cb694f00b7b | 439 | //! @brief AES128 encryption: |
| dflet | 0:9cb694f00b7b | 440 | //! Given AES128 key and 16 bytes plain text, cipher text of 16 bytes |
| dflet | 0:9cb694f00b7b | 441 | //! is computed. The AES implementation is in mode ECB (Electronic |
| dflet | 0:9cb694f00b7b | 442 | //! Code Book). |
| dflet | 0:9cb694f00b7b | 443 | //! |
| dflet | 0:9cb694f00b7b | 444 | //! |
| dflet | 0:9cb694f00b7b | 445 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 446 | |
| dflet | 0:9cb694f00b7b | 447 | void aes_encrypt(unsigned char *state, |
| dflet | 0:9cb694f00b7b | 448 | unsigned char *key) |
| dflet | 0:9cb694f00b7b | 449 | { |
| dflet | 0:9cb694f00b7b | 450 | // expand the key into 176 bytes |
| dflet | 0:9cb694f00b7b | 451 | expandKey(expandedKey, key); |
| dflet | 0:9cb694f00b7b | 452 | aes_encr(state, expandedKey); |
| dflet | 0:9cb694f00b7b | 453 | } |
| dflet | 0:9cb694f00b7b | 454 | |
| dflet | 0:9cb694f00b7b | 455 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 456 | // |
| dflet | 0:9cb694f00b7b | 457 | //! aes_decrypt |
| dflet | 0:9cb694f00b7b | 458 | //! |
| dflet | 0:9cb694f00b7b | 459 | //! @param[in] key AES128 key of size 16 bytes |
| dflet | 0:9cb694f00b7b | 460 | //! @param[in\out] state 16 bytes of cipher text and plain text |
| dflet | 0:9cb694f00b7b | 461 | //! |
| dflet | 0:9cb694f00b7b | 462 | //! @return none |
| dflet | 0:9cb694f00b7b | 463 | //! |
| dflet | 0:9cb694f00b7b | 464 | //! @brief AES128 decryption: |
| dflet | 0:9cb694f00b7b | 465 | //! Given AES128 key and 16 bytes cipher text, plain text of 16 bytes |
| dflet | 0:9cb694f00b7b | 466 | //! is computed The AES implementation is in mode ECB |
| dflet | 0:9cb694f00b7b | 467 | //! (Electronic Code Book). |
| dflet | 0:9cb694f00b7b | 468 | //! |
| dflet | 0:9cb694f00b7b | 469 | //! |
| dflet | 0:9cb694f00b7b | 470 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 471 | |
| dflet | 0:9cb694f00b7b | 472 | void aes_decrypt(unsigned char *state, |
| dflet | 0:9cb694f00b7b | 473 | unsigned char *key) |
| dflet | 0:9cb694f00b7b | 474 | { |
| dflet | 0:9cb694f00b7b | 475 | expandKey(expandedKey, key); // expand the key into 176 bytes |
| dflet | 0:9cb694f00b7b | 476 | aes_decr(state, expandedKey); |
| dflet | 0:9cb694f00b7b | 477 | } |
| dflet | 0:9cb694f00b7b | 478 | |
| dflet | 0:9cb694f00b7b | 479 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 480 | // |
| dflet | 0:9cb694f00b7b | 481 | //! aes_read_key |
| dflet | 0:9cb694f00b7b | 482 | //! |
| dflet | 0:9cb694f00b7b | 483 | //! @param[out] key AES128 key of size 16 bytes |
| dflet | 0:9cb694f00b7b | 484 | //! |
| dflet | 0:9cb694f00b7b | 485 | //! @return on success 0, error otherwise. |
| dflet | 0:9cb694f00b7b | 486 | //! |
| dflet | 0:9cb694f00b7b | 487 | //! @brief Reads AES128 key from EEPROM |
| dflet | 0:9cb694f00b7b | 488 | //! Reads the AES128 key from fileID #12 in EEPROM |
| dflet | 0:9cb694f00b7b | 489 | //! returns an error if the key does not exist. |
| dflet | 0:9cb694f00b7b | 490 | //! |
| dflet | 0:9cb694f00b7b | 491 | //! |
| dflet | 0:9cb694f00b7b | 492 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 493 | |
| dflet | 0:9cb694f00b7b | 494 | signed long aes_read_key(unsigned char *key) |
| dflet | 0:9cb694f00b7b | 495 | { |
| dflet | 0:9cb694f00b7b | 496 | signed long returnValue; |
| dflet | 0:9cb694f00b7b | 497 | |
| dflet | 0:9cb694f00b7b | 498 | returnValue = nvmem_read(NVMEM_AES128_KEY_FILEID, AES128_KEY_SIZE, 0, key); |
| dflet | 0:9cb694f00b7b | 499 | |
| dflet | 0:9cb694f00b7b | 500 | return returnValue; |
| dflet | 0:9cb694f00b7b | 501 | } |
| dflet | 0:9cb694f00b7b | 502 | |
| dflet | 0:9cb694f00b7b | 503 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 504 | // |
| dflet | 0:9cb694f00b7b | 505 | //! aes_write_key |
| dflet | 0:9cb694f00b7b | 506 | //! |
| dflet | 0:9cb694f00b7b | 507 | //! @param[out] key AES128 key of size 16 bytes |
| dflet | 0:9cb694f00b7b | 508 | //! |
| dflet | 0:9cb694f00b7b | 509 | //! @return on success 0, error otherwise. |
| dflet | 0:9cb694f00b7b | 510 | //! |
| dflet | 0:9cb694f00b7b | 511 | //! @brief writes AES128 key from EEPROM |
| dflet | 0:9cb694f00b7b | 512 | //! Writes the AES128 key to fileID #12 in EEPROM |
| dflet | 0:9cb694f00b7b | 513 | //! |
| dflet | 0:9cb694f00b7b | 514 | //! |
| dflet | 0:9cb694f00b7b | 515 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 516 | |
| dflet | 0:9cb694f00b7b | 517 | signed long aes_write_key(unsigned char *key) |
| dflet | 0:9cb694f00b7b | 518 | { |
| dflet | 0:9cb694f00b7b | 519 | signed long returnValue; |
| dflet | 0:9cb694f00b7b | 520 | |
| dflet | 0:9cb694f00b7b | 521 | returnValue = nvmem_write(NVMEM_AES128_KEY_FILEID, AES128_KEY_SIZE, 0, key); |
| dflet | 0:9cb694f00b7b | 522 | |
| dflet | 0:9cb694f00b7b | 523 | return returnValue; |
| dflet | 0:9cb694f00b7b | 524 | } |
| dflet | 0:9cb694f00b7b | 525 | |
| dflet | 0:9cb694f00b7b | 526 | #endif //CC3000_UNENCRYPTED_SMART_CONFIG |
| dflet | 0:9cb694f00b7b | 527 | |
| dflet | 0:9cb694f00b7b | 528 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 529 | // |
| dflet | 0:9cb694f00b7b | 530 | // Close the Doxygen group. |
| dflet | 0:9cb694f00b7b | 531 | //! @} |
| dflet | 0:9cb694f00b7b | 532 | // |
| dflet | 0:9cb694f00b7b | 533 | //***************************************************************************** |
| dflet | 0:9cb694f00b7b | 534 |