extern void hex2bin(char *src, char *dst, int length);
extern void bin2hex(char *src, char *dst, int length);
+extern int b64encode(const char *src, char *dst, int length);
+extern int b64decode(const char *src, char *dst, int length);
+
#ifdef HAVE_MINGW
extern const char *winerror(int);
#define strerror(x) ((x)>0?strerror(x):winerror(GetLastError()))