| 1 | /***************************************************************************** |
| 2 | * WARNING |
| 3 | * |
| 4 | * THIS CODE IS CREATED FOR EXPERIMENTATION AND EDUCATIONAL USE ONLY. |
| 5 | * |
| 6 | * USAGE OF THIS CODE IN OTHER WAYS MAY INFRINGE UPON THE INTELLECTUAL |
| 7 | * PROPERTY OF OTHER PARTIES, SUCH AS INSIDE SECURE AND HID GLOBAL, |
| 8 | * AND MAY EXPOSE YOU TO AN INFRINGEMENT ACTION FROM THOSE PARTIES. |
| 9 | * |
| 10 | * THIS CODE SHOULD NEVER BE USED TO INFRINGE PATENTS OR INTELLECTUAL PROPERTY RIGHTS. |
| 11 | * |
| 12 | ***************************************************************************** |
| 13 | * |
| 14 | * This file is part of loclass. It is a reconstructon of the cipher engine |
| 15 | * used in iClass, and RFID techology. |
| 16 | * |
| 17 | * The implementation is based on the work performed by |
| 18 | * Flavio D. Garcia, Gerhard de Koning Gans, Roel Verdult and |
| 19 | * Milosch Meriac in the paper "Dismantling IClass". |
| 20 | * |
| 21 | * Copyright (C) 2014 Martin Holst Swende |
| 22 | * |
| 23 | * This is free software: you can redistribute it and/or modify |
| 24 | * it under the terms of the GNU General Public License version 2 as published |
| 25 | * by the Free Software Foundation. |
| 26 | * |
| 27 | * This file is distributed in the hope that it will be useful, |
| 28 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 29 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 30 | * GNU General Public License for more details. |
| 31 | * |
| 32 | * You should have received a copy of the GNU General Public License |
| 33 | * along with loclass. If not, see <http://www.gnu.org/licenses/>. |
| 34 | * |
| 35 | * |
| 36 | * |
| 37 | ****************************************************************************/ |
| 38 | |
| 39 | |
| 40 | #ifndef CIPHERUTILS_H |
| 41 | #define CIPHERUTILS_H |
| 42 | #include <stdint.h> |
| 43 | #include <stdbool.h> |
| 44 | #include <stdlib.h> |
| 45 | |
| 46 | typedef struct { |
| 47 | uint8_t * buffer; |
| 48 | uint8_t numbits; |
| 49 | uint8_t position; |
| 50 | } BitstreamIn; |
| 51 | |
| 52 | typedef struct { |
| 53 | uint8_t * buffer; |
| 54 | uint8_t numbits; |
| 55 | uint8_t position; |
| 56 | }BitstreamOut; |
| 57 | |
| 58 | bool headBit( BitstreamIn *stream); |
| 59 | bool tailBit( BitstreamIn *stream); |
| 60 | void pushBit( BitstreamOut *stream, bool bit); |
| 61 | int bitsLeft( BitstreamIn *stream); |
| 62 | #ifndef ON_DEVICE |
| 63 | int testCipherUtils(void); |
| 64 | int testMAC(); |
| 65 | #endif |
| 66 | void push6bits( BitstreamOut* stream, uint8_t bits); |
| 67 | void EncryptDES(bool key[56], bool outBlk[64], bool inBlk[64], int verbose) ; |
| 68 | void x_num_to_bytes(uint64_t n, size_t len, uint8_t* dest); |
| 69 | uint64_t x_bytes_to_num(uint8_t* src, size_t len); |
| 70 | uint8_t reversebytes(uint8_t b); |
| 71 | void reverse_arraybytes(uint8_t* arr, size_t len); |
| 72 | void reverse_arraycopy(uint8_t* arr, uint8_t* dest, size_t len); |
| 73 | void printarr(char * name, uint8_t* arr, int len); |
| 74 | void printvar(char * name, uint8_t* arr, int len); |
| 75 | void printarr_human_readable(char * title, uint8_t* arr, int len); |
| 76 | #endif // CIPHERUTILS_H |