-char* base64( const void* binaryData, int len, int *flen );
-unsigned char* unbase64( const char* ascii, int len, int *flen );
+#include "system.h"
+
+
+int base64_encoded_size(int);
+int base64_decoded_size(const char *);
+
+void base64_encode(char *, const void *, int);
+void base64_decode(byte *, const char *);