Rafael Azuero Hurtado / smallAES

Small AES_ECB with T-box

Dependents:   BLE_LED_ADC_BBC BLE_BBC_LSM303 BLE_BBC_LSM303_MAG BLE_BBC_LSM303_MAG ... more

small_aes.h@0:27d3a972ad80, 2012-10-10 (annotated)

Committer:
razueroh
Date:
Wed Oct 10 14:09:25 2012 +0000
Revision:
0:27d3a972ad80
Child:
1:0075ec28b9dd
Small AES_ECB

Who changed what in which revision?

UserRevisionLine numberNew contents of line
razueroh 0:27d3a972ad80 1 /* small_aes.h
razueroh 0:27d3a972ad80 2 *
razueroh 0:27d3a972ad80 3 * Copyright (c) 2012 Rafael Azuero Hurtado - German Londoño Paez
razueroh 0:27d3a972ad80 4 *
razueroh 0:27d3a972ad80 5 * This program is free software: you can redistribute it and/or modify
razueroh 0:27d3a972ad80 6 * it under the terms of the GNU General Public License as published by
razueroh 0:27d3a972ad80 7 * the Free Software Foundation, either version 3 of the License, or
razueroh 0:27d3a972ad80 8 * (at your option) any later version.
razueroh 0:27d3a972ad80 9 *
razueroh 0:27d3a972ad80 10 * This program is distributed in the hope that it will be useful,
razueroh 0:27d3a972ad80 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
razueroh 0:27d3a972ad80 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
razueroh 0:27d3a972ad80 13 * GNU General Public License for more details.
razueroh 0:27d3a972ad80 14 *
razueroh 0:27d3a972ad80 15 * You should have received a copy of the GNU General Public License
razueroh 0:27d3a972ad80 16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
razueroh 0:27d3a972ad80 17 */
razueroh 0:27d3a972ad80 18
razueroh 0:27d3a972ad80 19 /**
razueroh 0:27d3a972ad80 20 * @file small_aes.h
razueroh 0:27d3a972ad80 21 * @brief Small AES with T-box
razueroh 0:27d3a972ad80 22 */
razueroh 0:27d3a972ad80 23
razueroh 0:27d3a972ad80 24 #ifndef _SMALL_AES_H_
razueroh 0:27d3a972ad80 25 #define _SMALL_AES_H_
razueroh 0:27d3a972ad80 26
razueroh 0:27d3a972ad80 27 #include "mbed.h"
razueroh 0:27d3a972ad80 28
razueroh 0:27d3a972ad80 29 #ifdef __cplusplus
razueroh 0:27d3a972ad80 30 extern "C" {
razueroh 0:27d3a972ad80 31 #endif
razueroh 0:27d3a972ad80 32
razueroh 0:27d3a972ad80 33 enum {
razueroh 0:27d3a972ad80 34 SMALL_AES_ENCRYPTION = 0,
razueroh 0:27d3a972ad80 35 SMALL_AES_DECRYPTION = 1,
razueroh 0:27d3a972ad80 36 SMALL_AES_BLOCK_SIZE = 16
razueroh 0:27d3a972ad80 37 };
razueroh 0:27d3a972ad80 38
razueroh 0:27d3a972ad80 39 typedef struct AES {
razueroh 0:27d3a972ad80 40 unsigned int key[60];
razueroh 0:27d3a972ad80 41 unsigned int rounds;
razueroh 0:27d3a972ad80 42
razueroh 0:27d3a972ad80 43 unsigned int reg[SMALL_AES_BLOCK_SIZE / sizeof(unsigned int)];
razueroh 0:27d3a972ad80 44 } AES;
razueroh 0:27d3a972ad80 45
razueroh 0:27d3a972ad80 46 /**
razueroh 0:27d3a972ad80 47 * @fn int aesSetKey(AES* aes, const unsigned char *key, unsigned int len, int dir)
razueroh 0:27d3a972ad80 48 * @brief Sets AES key
razueroh 0:27d3a972ad80 49 * @param aes The AES struct
razueroh 0:27d3a972ad80 50 * @param key The key bytes
razueroh 0:27d3a972ad80 51 * @param len The Key length
razueroh 0:27d3a972ad80 52 * @param dir If encrypt or decrypt
razueroh 0:27d3a972ad80 53 */
razueroh 0:27d3a972ad80 54 int aesSetKey(AES* aes, const unsigned char *key, unsigned int len, int dir);
razueroh 0:27d3a972ad80 55
razueroh 0:27d3a972ad80 56 /**
razueroh 0:27d3a972ad80 57 * @fn void aesEncrypt(AES* aes, const unsigned char *inBlock, unsigned char *outBlock)
razueroh 0:27d3a972ad80 58 * @brief Encrypts a 16-byte block
razueroh 0:27d3a972ad80 59 * @param aes The AES struct
razueroh 0:27d3a972ad80 60 * @param inBlock The 16-byte input block
razueroh 0:27d3a972ad80 61 * @param outBlock The 16-byte output block
razueroh 0:27d3a972ad80 62 */
razueroh 0:27d3a972ad80 63 void aesEncrypt(AES* aes, const unsigned char *inBlock, unsigned char *outBlock);
razueroh 0:27d3a972ad80 64
razueroh 0:27d3a972ad80 65 /**
razueroh 0:27d3a972ad80 66 * @fn void aesDecrypt(AES* aes, const unsigned char *inBlock, unsigned char *outBlock)
razueroh 0:27d3a972ad80 67 * @brief Decrypts a 16-byte block
razueroh 0:27d3a972ad80 68 * @param aes The AES struct
razueroh 0:27d3a972ad80 69 * @param inBlock The 16-byte input block
razueroh 0:27d3a972ad80 70 * @param outBlock The 16-byte output block
razueroh 0:27d3a972ad80 71 */
razueroh 0:27d3a972ad80 72 void aesDecrypt(AES* aes, const unsigned char *inBlock, unsigned char *outBlock);
razueroh 0:27d3a972ad80 73
razueroh 0:27d3a972ad80 74 /**
razueroh 0:27d3a972ad80 75 * @fn void aesEcbEncrypt(AES* aes, unsigned char *output, const unsigned char *input, unsigned int inputSize)
razueroh 0:27d3a972ad80 76 * @brief Encrypts a n-byte block with AES-ECB
razueroh 0:27d3a972ad80 77 * @param aes The AES struct
razueroh 0:27d3a972ad80 78 * @param output The input data
razueroh 0:27d3a972ad80 79 * @param input The output data
razueroh 0:27d3a972ad80 80 * @param inputSize The input data size in bytes
razueroh 0:27d3a972ad80 81 */
razueroh 0:27d3a972ad80 82 void aesEcbEncrypt(AES* aes, unsigned char *output, const unsigned char *input, unsigned int inputSize);
razueroh 0:27d3a972ad80 83
razueroh 0:27d3a972ad80 84 /**
razueroh 0:27d3a972ad80 85 * @fn void aesEcbDecrypt(AES* aes, unsigned char *output, const unsigned char *input, unsigned int inputSize)
razueroh 0:27d3a972ad80 86 * @brief Decrypts a n-bytes block with AES-ECB
razueroh 0:27d3a972ad80 87 * @param aes The AES struct
razueroh 0:27d3a972ad80 88 * @param output The input data
razueroh 0:27d3a972ad80 89 * @param input The output data
razueroh 0:27d3a972ad80 90 * @param inputSize The input data size in bytes
razueroh 0:27d3a972ad80 91 */
razueroh 0:27d3a972ad80 92 void aesEcbDecrypt(AES* aes, unsigned char *output, const unsigned char *input, unsigned int inputSize);
razueroh 0:27d3a972ad80 93
razueroh 0:27d3a972ad80 94 /**
razueroh 0:27d3a972ad80 95 * @fn unsigned int byteReverseWord32(unsigned int value)
razueroh 0:27d3a972ad80 96 * @brief Converts a big-endian 32-bit word to little-endian format
razueroh 0:27d3a972ad80 97 * @param value The big-endian 32-bit word
razueroh 0:27d3a972ad80 98 */
razueroh 0:27d3a972ad80 99 unsigned int byteReverseWord32(unsigned int value);
razueroh 0:27d3a972ad80 100
razueroh 0:27d3a972ad80 101 /**
razueroh 0:27d3a972ad80 102 * @fn void byteReverseWords(unsigned int *out, const unsigned int *in, unsigned int byteCount)
razueroh 0:27d3a972ad80 103 * @brief Converts a big-endian block to little-endian format
razueroh 0:27d3a972ad80 104 * @param out The output block
razueroh 0:27d3a972ad80 105 * @param in The input block
razueroh 0:27d3a972ad80 106 * @param byteCount The Number of bytes
razueroh 0:27d3a972ad80 107 */
razueroh 0:27d3a972ad80 108 void byteReverseWords(unsigned int *out, const unsigned int *in, unsigned int byteCount);
razueroh 0:27d3a972ad80 109
razueroh 0:27d3a972ad80 110 /**
razueroh 0:27d3a972ad80 111 * @fn unsigned int rotlFixed(unsigned int x, unsigned int y)
razueroh 0:27d3a972ad80 112 * @brief Rotates a 32-bit word n-bytes to the left
razueroh 0:27d3a972ad80 113 * @param x The32-bit word
razueroh 0:27d3a972ad80 114 * @param y The number of bytes to rotate
razueroh 0:27d3a972ad80 115 */
razueroh 0:27d3a972ad80 116 unsigned int rotlFixed(unsigned int x, unsigned int y);
razueroh 0:27d3a972ad80 117
razueroh 0:27d3a972ad80 118 /**
razueroh 0:27d3a972ad80 119 * @fn unsigned int rotrFixed(unsigned int x, unsigned int y)
razueroh 0:27d3a972ad80 120 * @brief Rotates a 32-bit word n-bytes to the right
razueroh 0:27d3a972ad80 121 * @param x The 32-bit word
razueroh 0:27d3a972ad80 122 * @param y The number of bytes to rotate
razueroh 0:27d3a972ad80 123 */
razueroh 0:27d3a972ad80 124 unsigned int rotrFixed(unsigned int x, unsigned int y);
razueroh 0:27d3a972ad80 125
razueroh 0:27d3a972ad80 126
razueroh 0:27d3a972ad80 127 #ifdef __cplusplus
razueroh 0:27d3a972ad80 128 } /* extern "C" */
razueroh 0:27d3a972ad80 129 #endif
razueroh 0:27d3a972ad80 130
razueroh 0:27d3a972ad80 131 #endif