CHG: textual change in README.md

[proxmark3-svn] / client / util.c

diff --git a/client/util.c b/client/util.c
index a3672130685ba7e838e51efefb7979dd4719b42d..586d930b263d68bebb653d889a75aea281969fba 100644 (file)
--- a/client/util.c
+++ b/client/util.c
@@ -21,14 +21,14 @@ int ukbhit(void)
   int error;
   static struct termios Otty, Ntty;
 
-  tcgetattr( 0, &Otty);
+  if ( tcgetattr( 0, &Otty) == -1) return -1;
   Ntty = Otty;
 
-  Ntty.c_iflag          = 0;       /* input mode                */
-  Ntty.c_oflag          = 0;       /* output mode               */
-  Ntty.c_lflag         &= ~ICANON; /* raw mode */
-  Ntty.c_cc[VMIN]       = CMIN;    /* minimum time to wait      */
-  Ntty.c_cc[VTIME]      = CTIME;   /* minimum characters to wait for */
+  Ntty.c_iflag         = 0;       /* input mode                */
+  Ntty.c_oflag         = 0;       /* output mode               */
+  Ntty.c_lflag         &= ~ICANON; /* raw mode */
+  Ntty.c_cc[VMIN]      = CMIN;    /* minimum time to wait      */
+  Ntty.c_cc[VTIME]     = CTIME;   /* minimum characters to wait for */
 
   if (0 == (error = tcsetattr(0, TCSANOW, &Ntty))) {
     error += ioctl(0, FIONREAD, &cnt);
@@ -97,14 +97,26 @@ void FillFileNameByUID(char *fileName, uint8_t * uid, char *ext, int byteCount)
 }
 
 // printing and converting functions
-
-void print_hex(const uint8_t * data, const size_t len)
-{
+void print_hex(const uint8_t * data, const size_t len) {
        size_t i;
-
-       for (i=0; i < len; i++)
+       for (i=0; i < len; ++i)
                printf("%02x ", data[i]);
+       printf("\n");
+}
+void print_hex_break(const uint8_t *data, const size_t len, uint8_t breaks) {
+
+       int rownum = 0;
+       printf("[%02d] | ", rownum);
+       for (int i = 0; i < len; ++i) {
 
+               printf("%02X ", data[i]);
+               
+               // check if a line break is needed
+               if ( breaks > 0 && !((i+1) % breaks) && (i+1 < len) ) {
+                       ++rownum;
+                       printf("\n[%02d] | ", rownum);
+               }
+       }
        printf("\n");
 }
 
@@ -137,7 +149,7 @@ char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t brea
 
        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++) {
+       for (size_t out_index=0; out_index < max_len-2; 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
@@ -158,9 +170,10 @@ char *sprint_bin(const uint8_t *data, const size_t len) {
 
 char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
        static char buf[1024];
-       memset(buf, 0x00, 1024);
        char *tmp = buf;
-       sprintf(tmp, "%s| %s", sprint_hex(data, len) , data);   
+       memset(buf, 0x00, 1024);
+       size_t max_len = (len > 1010) ? 1010 : len;
+       sprintf(tmp, "%s| %s", sprint_hex(data, max_len) , data);       
        return buf;
 }
 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
@@ -463,11 +476,9 @@ void binarraytobinstring(char *target, char *source,  int length)
 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
 {
     int x;
-
-    for(x= 0 ; length > 0 ; --length)
+    for( x = 0 ; length > 0 ; --length)
         x += bits[length - 1];
     x %= 2;
-
     return x ^ type;
 }
 
@@ -503,11 +514,20 @@ uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
        return tmp;
 }
 
-// RotateLeft - Ultralight, Desfire
-void rol(uint8_t *data, const size_t len){
+// 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;
+}
+
+uint32_t SwapBits(uint32_t value, int nrbits) {
+       uint32_t newvalue = 0;
+       for(int i = 0; i < nrbits; i++) {
+               newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
+       }
+       return newvalue;
 }
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