fpga: added iCLASS on deviceside

armsrc/optimized_cipherutils.h

@@ -0,0 +1,66 @@
+/*****************************************************************************
+ * WARNING
+ *
+ * THIS CODE IS CREATED FOR EXPERIMENTATION AND EDUCATIONAL USE ONLY.
+ *
+ * USAGE OF THIS CODE IN OTHER WAYS MAY INFRINGE UPON THE INTELLECTUAL
+ * PROPERTY OF OTHER PARTIES, SUCH AS INSIDE SECURE AND HID GLOBAL,
+ * AND MAY EXPOSE YOU TO AN INFRINGEMENT ACTION FROM THOSE PARTIES.
+ *
+ * THIS CODE SHOULD NEVER BE USED TO INFRINGE PATENTS OR INTELLECTUAL PROPERTY RIGHTS.
+ *
+ *****************************************************************************
+ *
+ * This file is part of loclass. It is a reconstructon of the cipher engine
+ * used in iClass, and RFID techology.
+ *
+ * The implementation is based on the work performed by
+ * Flavio D. Garcia, Gerhard de Koning Gans, Roel Verdult and
+ * Milosch Meriac in the paper "Dismantling IClass".
+ *
+ * Copyright (C) 2014 Martin Holst Swende
+ *
+ * This is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation, or, at your option, any later version.
+ *
+ * This file is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with loclass.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ ****************************************************************************/
+#ifndef CIPHERUTILS_H
+#define CIPHERUTILS_H
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+typedef struct {
+    uint8_t *buffer;
+    uint8_t numbits;
+    uint8_t position;
+} BitstreamIn;
+
+typedef struct {
+    uint8_t *buffer;
+    uint8_t numbits;
+    uint8_t position;
+} BitstreamOut;
+
+bool headBit(BitstreamIn *stream);
+bool tailBit(BitstreamIn *stream);
+void pushBit(BitstreamOut *stream, bool bit);
+int bitsLeft(BitstreamIn *stream);
+
+void push6bits(BitstreamOut *stream, uint8_t bits);
+void x_num_to_bytes(uint64_t n, size_t len, uint8_t *dest);
+uint64_t x_bytes_to_num(uint8_t *src, size_t len);
+uint8_t reversebytes(uint8_t b);
+void reverse_arraybytes(uint8_t *arr, size_t len);
+void reverse_arraycopy(uint8_t *arr, uint8_t *dest, size_t len);
+#endif // CIPHERUTILS_H