fix bug in lf standalone mode

[proxmark3-svn] / client / util.c

diff --git a/client/util.c b/client/util.c
index 9f2142c6a4114d7c2e6f50f6ac97fca70c709522..c4f7d200f61bb096949c2e5939c9c48349da7431 100644 (file)
--- a/client/util.c
+++ b/client/util.c
@@ -9,11 +9,13 @@
 //-----------------------------------------------------------------------------
 
 #include "util.h"
+#define MAX_BIN_BREAK_LENGTH   (3072+384+1)
 
 #ifndef _WIN32
 #include <termios.h>
 #include <sys/ioctl.h> 
 
+
 int ukbhit(void)
 {
   int cnt = 0;
@@ -123,16 +125,30 @@ char *sprint_hex(const uint8_t *data, const size_t len) {
 }
 
 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
-       
-       int maxLen = ( len > 1020) ? 1020 : len;
-       static char buf[1024];
-       memset(buf, 0x00, 1024);
+       // make sure we don't go beyond our char array memory
+       int max_len;
+       if (breaks==0)
+               max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
+       else
+               max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
+
+       static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
+       //clear memory
+       memset(buf, 0x00, sizeof(buf));
        char *tmp = buf;
 
-       for (size_t i=0; i < maxLen; ++i){
-               sprintf(tmp++, "%u", data[i]);
-               if (breaks > 0 && !((i+1) % breaks))
+       size_t in_index = 0;
+       // loop through the out_index to make sure we don't go too far
+       for (size_t out_index=0; out_index < max_len; out_index++) {
+               // set character
+               sprintf(tmp++, "%u", data[in_index]);
+               // check if a line break is needed and we have room to print it in our array
+               if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
+                       // increment and print line break
+                       out_index++;
                        sprintf(tmp++, "%s","\n");
+               }
+               in_index++;
        }
 
        return buf;
@@ -160,6 +176,13 @@ uint64_t bytes_to_num(uint8_t* src, size_t len)
        return num;
 }
 
+void num_to_bytebits(uint64_t  n, size_t len, uint8_t *dest) {
+       while (len--) {
+               dest[len] = n & 1;
+               n >>= 1;
+       }
+}
+
 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
 // to
 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
@@ -248,7 +271,7 @@ char param_getchar(const char *line, int paramnum)
 
 uint8_t param_get8(const char *line, int paramnum)
 {
-       return param_get8ex(line, paramnum, 10, 0);
+       return param_get8ex(line, paramnum, 0, 10);
 }
 
 /**
@@ -333,7 +356,28 @@ int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
 
        return 0;
 }
+int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
+{
+       int bg, en, temp, i;
 
+       //if (hexcnt % 2)
+       //      return 1;
+       
+       if (param_getptr(line, &bg, &en, paramnum)) return 1;
+
+       *hexcnt = en - bg + 1;
+       if (*hexcnt % 2) //error if not complete hex bytes
+               return 1;
+
+       for(i = 0; i < *hexcnt; i += 2) {
+               if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) )   return 1;
+               
+               sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
+               data[i / 2] = temp & 0xff;
+       }       
+
+       return 0;
+}
 int param_getstr(const char *line, int paramnum, char * str)
 {
        int bg, en;
@@ -425,7 +469,7 @@ void binarraytobinstring(char *target, char *source,  int length)
 }
 
 // return parity bit required to match type
-uint8_t GetParity( char *bits, uint8_t type, int length)
+uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
 {
     int x;
 
@@ -437,7 +481,7 @@ uint8_t GetParity( char *bits, uint8_t type, int length)
 }
 
 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
-void wiegand_add_parity(char *target, char *source, char length)
+void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
 {
     *(target++)= GetParity(source, EVEN, length / 2);
     memcpy(target, source, length);
@@ -453,3 +497,13 @@ void xor(unsigned char *dst, unsigned char *src, size_t len) {
 int32_t le24toh (uint8_t data[3]) {
     return (data[2] << 16) | (data[1] << 8) | data[0];
 }
+
+// RotateLeft - Ultralight, Desfire, works on byte level
+// 00-01-02  >> 01-02-00
+void rol(uint8_t *data, const size_t len){
+    uint8_t first = data[0];
+    for (size_t i = 0; i < len-1; i++) {
+        data[i] = data[i+1];
+    }
+    data[len-1] = first;
+}