ADD: @marshmellow42's decrypt crypto-1 method,

[proxmark3-svn] / client / util.c

diff --git a/client/util.c b/client/util.c
index cea9f7d734a81150d1f5536118364552dcbfa807..79744d1eb42ce807600a4c3c7217b969223f1347 100644 (file)
--- a/client/util.c
+++ b/client/util.c
@@ -20,7 +20,6 @@ int ukbhit(void)
   int error;
   static struct termios Otty, Ntty;
 
-
   tcgetattr( 0, &Otty);
   Ntty = Otty;
 
@@ -108,7 +107,7 @@ 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];
@@ -117,7 +116,7 @@ char * sprint_hex(const uint8_t * data, const size_t len) {
        size_t i;
 
        for (i=0; i < maxLen; ++i, tmp += 3)
-               sprintf(tmp, "%02x ", data[i]);
+               sprintf(tmp, "%02X ", data[i]);
 
        return buf;
 }
@@ -248,7 +247,7 @@ 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 +332,28 @@ 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;
@@ -444,3 +464,27 @@ 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];
+}
+
+
+uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
+       
+       int i = start;
+       int j = len-1;
+
+       if (len > 32) return 0;
+
+       uint32_t tmp = 0;
+       for (; j >= 0; --j, ++i)
+               tmp     |= bits[i] << j;
+
+       return tmp;
+}