minor cleanups

[proxmark3-svn] / client / util.c

diff --git a/client/util.c b/client/util.c
index 0dd6905e7d7754750d84a2bff4634067f2b8623a..5e9fce858fe9606da93830da0eb9b4c4970883b9 100644 (file)
--- a/client/util.c
+++ b/client/util.c
@@ -108,12 +108,12 @@ void print_hex(const uint8_t * data, const size_t len)
        printf("\n");
 }
 
-char * sprint_hex(const uint8_t * data, const size_t len) {
+char *sprint_hex(const uint8_t *data, const size_t len) {
        
        int maxLen = ( len > 1024/3) ? 1024/3 : len;
        static char buf[1024];
        memset(buf, 0x00, 1024);
-       char * tmp = buf;
+       char *tmp = buf;
        size_t i;
 
        for (i=0; i < maxLen; ++i, tmp += 3)
@@ -124,7 +124,7 @@ 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 > 1024) ? 1024 : len;
+       int maxLen = ( len > 1020) ? 1020 : len;
        static char buf[1024];
        memset(buf, 0x00, 1024);
        char *tmp = buf;
@@ -333,7 +333,28 @@ 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;
@@ -394,7 +415,7 @@ int hextobinstring(char *target, char *source)
 
 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
 // return number of bits converted
-int binarraytohex(char *target, char *source, int length)
+int binarraytohex(char *target,char *source, int length)
 {
     unsigned char i, x;
     int j = length;
@@ -444,3 +465,12 @@ void wiegand_add_parity(char *target, char *source, char length)
     target += length;
     *(target)= GetParity(source + length / 2, ODD, length / 2);
 }
+
+void xor(unsigned char *dst, unsigned char *src, size_t len) {
+   for( ; len > 0; len--,dst++,src++)
+       *dst ^= *src;
+}
+
+int32_t le24toh (uint8_t data[3]) {
+    return (data[2] << 16) | (data[1] << 8) | data[0];
+}