Code improved for less memory

[proxmark3-svn] / client / loclass / cipherutils.c

diff --git a/client/loclass/cipherutils.c b/client/loclass/cipherutils.c
index 685a3815bc2d4ad4c8742496a81a502f131daa07..b5e365bf45780c34e1911f185080ba85d6b08739 100644 (file)
--- a/client/loclass/cipherutils.c
+++ b/client/loclass/cipherutils.c
@@ -1,5 +1,17 @@
 /*****************************************************************************
 /*****************************************************************************

- * This file is part of iClassCipher. It is a reconstructon of the cipher engine
+ * 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
  * used in iClass, and RFID techology.
  *
  * The implementation is based on the work performed by


@@ -10,7 +22,7 @@
  *
  * 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
  *
  * 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.
+ * 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
  *
  * This file is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of


@@ -18,15 +30,16 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License

- * along with IClassCipher.  If not, see <http://www.gnu.org/licenses/>.
+ * along with loclass.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ * 

  ****************************************************************************/
 
  ****************************************************************************/
 

-#include "cipherutils.h"
-#include "../util.h"

 #include <stdint.h>
 #include <stdio.h>
 #include <string.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <string.h>

-
+#include "fileutils.h"
+#include "cipherutils.h"

 /**
  *
  * @brief Return and remove the first bit (x0) in the stream : <x0 x1 x2 x3 ... xn >
 /**
  *
  * @brief Return and remove the first bit (x0) in the stream : <x0 x1 x2 x3 ... xn >


@@ -101,6 +114,24 @@ int numBits(BitstreamOut *stream)
        return stream->numbits;
 }
 
        return stream->numbits;
 }
 

+void x_num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
+{
+       while (len--) {
+               dest[len] = (uint8_t) n;
+               n >>= 8;
+       }
+}
+
+uint64_t x_bytes_to_num(uint8_t* src, size_t len)
+{
+       uint64_t num = 0;
+       while (len--)
+       {
+               num = (num << 8) | (*src);
+               src++;
+       }
+       return num;
+}

 uint8_t reversebytes(uint8_t b) {
        b = (b & 0xF0) >> 4 | (b & 0x0F) << 4;
        b = (b & 0xCC) >> 2 | (b & 0x33) << 2;
 uint8_t reversebytes(uint8_t b) {
        b = (b & 0xF0) >> 4 | (b & 0x0F) << 4;
        b = (b & 0xCC) >> 2 | (b & 0x33) << 2;


@@ -115,13 +146,76 @@ void reverse_arraybytes(uint8_t* arr, size_t len)
                arr[i] = reversebytes(arr[i]);
        }
 }
                arr[i] = reversebytes(arr[i]);
        }
 }

+void reverse_arraycopy(uint8_t* arr, uint8_t* dest, size_t len)
+{
+       uint8_t i;
+       for( i =0; i< len ; i++)
+       {
+               dest[i] = reversebytes(arr[i]);
+       }
+}

 
 

+void printarr(char * name, uint8_t* arr, int len)
+{
+       int cx;
+       size_t outsize = 40+strlen(name)+len*5;
+       char* output = malloc(outsize);
+       memset(output, 0,outsize);
+
+       int i ;
+       cx = snprintf(output,outsize, "uint8_t %s[] = {", name);
+       for(i =0 ;  i< len ; i++)
+       {
+               cx += snprintf(output+cx,outsize-cx,"0x%02x,",*(arr+i));//5 bytes per byte
+       }
+       cx += snprintf(output+cx,outsize-cx,"};");
+       prnlog(output);
+       free(output);
+}
+
+void printvar(char * name, uint8_t* arr, int len)
+{
+       int cx;
+       size_t outsize = 40+strlen(name)+len*2;
+       char* output = malloc(outsize);
+       memset(output, 0,outsize);
+
+       int i ;
+       cx = snprintf(output,outsize,"%s = ", name);
+       for(i =0 ;  i< len ; i++)
+       {
+               cx += snprintf(output+cx,outsize-cx,"%02x",*(arr+i));//2 bytes per byte
+       }
+
+       prnlog(output);
+       free(output);
+}
+
+void printarr_human_readable(char * title, uint8_t* arr, int len)
+{
+       int cx;
+       size_t outsize = 100+strlen(title)+len*4;
+       char* output = malloc(outsize);
+       memset(output, 0,outsize);
+
+
+       int i;
+       cx = snprintf(output,outsize,  "\n\t%s\n", title);
+       for(i =0 ;  i< len ; i++)
+       {
+               if(i % 16 == 0)
+                       cx += snprintf(output+cx,outsize-cx,"\n%02x| ", i );
+               cx += snprintf(output+cx,outsize-cx, "%02x ",*(arr+i));
+       }
+       prnlog(output);
+       free(output);
+}

 
 //-----------------------------
 // Code for testing below
 //-----------------------------
 
 
 //-----------------------------
 // Code for testing below
 //-----------------------------
 

-
+#ifndef ON_DEVICE

 int testBitStream()
 {
        uint8_t input [] = {0xDE,0xAD,0xBE,0xEF,0xDE,0xAD,0xBE,0xEF};
 int testBitStream()
 {
        uint8_t input [] = {0xDE,0xAD,0xBE,0xEF,0xDE,0xAD,0xBE,0xEF};


@@ -137,14 +231,14 @@ int testBitStream()
        }
        if(memcmp(input, output, sizeof(input)) == 0)
        {
        }
        if(memcmp(input, output, sizeof(input)) == 0)
        {

-               printf("Bitstream test 1 ok\n");
+               prnlog("    Bitstream test 1 ok");

        }else
        {
        }else
        {

-               printf("Bitstream test 1 failed\n");
+               prnlog("    Bitstream test 1 failed");

                uint8_t i;
                for(i = 0 ; i < sizeof(input) ; i++)
                {
                uint8_t i;
                for(i = 0 ; i < sizeof(input) ; i++)
                {

-                       printf("IN %02x, OUT %02x\n", input[i], output[i]);
+                       prnlog("    IN %02x, OUT %02x", input[i], output[i]);

                }
                return 1;
        }
                }
                return 1;
        }


@@ -171,14 +265,14 @@ int testReversedBitstream()
        }
        if(memcmp(input, output, sizeof(input)) == 0)
        {
        }
        if(memcmp(input, output, sizeof(input)) == 0)
        {

-               printf("Bitstream test 2 ok\n");
+               prnlog("    Bitstream test 2 ok");

        }else
        {
        }else
        {

-               printf("Bitstream test 2 failed\n");
+               prnlog("    Bitstream test 2 failed");

                uint8_t i;
                for(i = 0 ; i < sizeof(input) ; i++)
                {
                uint8_t i;
                for(i = 0 ; i < sizeof(input) ; i++)
                {

-                       printf("IN %02x, MIDDLE: %02x, OUT %02x\n", input[i],reverse[i], output[i]);
+                       prnlog("    IN %02x, MIDDLE: %02x, OUT %02x", input[i],reverse[i], output[i]);

                }
                return 1;
        }
                }
                return 1;
        }


@@ -188,8 +282,10 @@ int testReversedBitstream()
 
 int testCipherUtils(void)
 {
 
 int testCipherUtils(void)
 {

+       prnlog("[+] Testing some internals...");

        int retval = 0;
        retval |= testBitStream();
        retval |= testReversedBitstream();
        return retval;
 }
        int retval = 0;
        retval |= testBitStream();
        retval |= testReversedBitstream();
        return retval;
 }

+#endif