Some more nasty bugs fixed in the lf t55xx manchester_decode method.

[proxmark3-svn] / client / ui.c

diff --git a/client/ui.c b/client/ui.c
index 966ab2ca12f696501340b06fdafd7b981c5906fc..816bff44058dea8230617a1da3ad8e466b00d45d 100644 (file)
--- a/client/ui.c
+++ b/client/ui.c
@@ -95,14 +95,14 @@ void SetLogFilename(char *fn)
   logfilename = fn;
 }
 
-int manchester_decode( int * data, const size_t len, uint8_t * dataout){
+int manchester_decode( int * data, const size_t len, uint8_t * dataout,  size_t dataoutlen){
        
        int bitlength = 0;
        int i, clock, high, low, startindex;
        low = startindex = 0;
        high = 1;
-       uint8_t * bitStream =  (uint8_t* ) malloc(sizeof(uint8_t) * len);       
-       memset(bitStream, 0x00, len);
+       uint8_t * bitStream =  (uint8_t* ) malloc(sizeof(uint8_t) * dataoutlen);        
+       memset(bitStream, 0x00, dataoutlen);    
        
        /* Detect high and lows */
        for (i = 0; i < len; i++) {
@@ -116,12 +116,12 @@ int manchester_decode( int * data, const size_t len, uint8_t * dataout){
        clock = GetT55x7Clock( data, len, high );       
        startindex = DetectFirstTransition(data, len, high);
   
-       PrintAndLog(" Clock       : %d", clock);
+       //PrintAndLog(" Clock       : %d", clock);
 
        if (high != 1)
-               bitlength = ManchesterConvertFrom255(data, len, bitStream, high, low, clock, startindex);
+               bitlength = ManchesterConvertFrom255(data, len, bitStream, dataoutlen, high, low, clock, startindex);
        else
-               bitlength= ManchesterConvertFrom1(data, len, bitStream, clock, startindex);
+               bitlength= ManchesterConvertFrom1(data, len, bitStream, dataoutlen, clock, startindex);
 
        memcpy(dataout, bitStream, bitlength);
        free(bitStream);
@@ -192,7 +192,7 @@ int manchester_decode( int * data, const size_t len, uint8_t * dataout){
        return i;
  }
 
- int ManchesterConvertFrom255(const int * data, const size_t len, uint8_t * dataout, int high, int low, int clock, int startIndex){
+ int ManchesterConvertFrom255(const int * data, const size_t len, uint8_t * dataout, int dataoutlen, int high, int low, int clock, int startIndex){
 
        int i, j, z, hithigh, hitlow, bitIndex, startType;
        i = 0;
@@ -205,7 +205,7 @@ int manchester_decode( int * data, const size_t len, uint8_t * dataout){
        int firstST = 0;
 
        // i = clock frame of data
-       for (; i < (int)(len / clock); i++)
+       for (; i < (int)(len/clock); i++)
        {
                hithigh = 0;
                hitlow = 0;
@@ -261,11 +261,13 @@ int manchester_decode( int * data, const size_t len, uint8_t * dataout){
                
                if ( firstST == 4)
                        break;
+               if ( bitIndex >= dataoutlen-1 )
+                       break;
        }
        return bitIndex;
  }
  
- int ManchesterConvertFrom1(const int * data, const size_t len, uint8_t * dataout, int clock, int startIndex){
+ int ManchesterConvertFrom1(const int * data, const size_t len, uint8_t * dataout,int dataoutlen, int clock, int startIndex){
 
        PrintAndLog(" Path B");