65 lines
2.5 KiB
C
65 lines
2.5 KiB
C
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//-----------------------------------------------------------------------------
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// Borrowed initially from https://github.com/holiman/loclass
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// More recently from https://github.com/RfidResearchGroup/proxmark3
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// Copyright (C) 2014 Martin Holst Swende
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// Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// See LICENSE.txt for the text of the license.
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//-----------------------------------------------------------------------------
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// WARNING
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//
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// THIS CODE IS CREATED FOR EXPERIMENTATION AND EDUCATIONAL USE ONLY.
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//
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// USAGE OF THIS CODE IN OTHER WAYS MAY INFRINGE UPON THE INTELLECTUAL
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// PROPERTY OF OTHER PARTIES, SUCH AS INSIDE SECURE AND HID GLOBAL,
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// AND MAY EXPOSE YOU TO AN INFRINGEMENT ACTION FROM THOSE PARTIES.
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//
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// THIS CODE SHOULD NEVER BE USED TO INFRINGE PATENTS OR INTELLECTUAL PROPERTY RIGHTS.
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//-----------------------------------------------------------------------------
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// It is a reconstruction of the cipher engine used in iClass, and RFID techology.
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//
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// The implementation is based on the work performed by
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// Flavio D. Garcia, Gerhard de Koning Gans, Roel Verdult and
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// Milosch Meriac in the paper "Dismantling IClass".
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//-----------------------------------------------------------------------------
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#ifndef CIPHERUTILS_H
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#define CIPHERUTILS_H
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#include <stdint.h>
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#include <stdbool.h>
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#include <stdlib.h>
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typedef struct {
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uint8_t *buffer;
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uint8_t numbits;
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uint8_t position;
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} BitstreamIn_t;
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typedef struct {
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uint8_t *buffer;
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uint8_t numbits;
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uint8_t position;
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} BitstreamOut_t;
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bool headBit(BitstreamIn_t *stream);
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bool tailBit(BitstreamIn_t *stream);
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void pushBit(BitstreamOut_t *stream, bool bit);
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int bitsLeft(BitstreamIn_t *stream);
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void push6bits(BitstreamOut_t *stream, uint8_t bits);
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void x_num_to_bytes(uint64_t n, size_t len, uint8_t *dest);
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uint64_t x_bytes_to_num(uint8_t *src, size_t len);
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uint8_t reversebytes(uint8_t b);
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void reverse_arraybytes(uint8_t *arr, size_t len);
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void reverse_arraycopy(uint8_t *arr, uint8_t *dest, size_t len);
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#endif // CIPHERUTILS_H
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