* of the GNU Lesser General Public License.
*/
-uns base64_encode(byte *dest, byte *src, uns len);
-uns base64_decode(byte *dest, byte *src, uns len);
+uns base64_encode(byte *dest, const byte *src, uns len);
+uns base64_decode(byte *dest, const byte *src, uns len);
/*
* Use this macro to calculate buffer size.