extern uschar *b64encode(const uschar *, int);
extern uschar *b64encode_taint(const uschar *, int, const void *);
-extern int b64decode(const uschar *, uschar **);
+extern int b64decode(const uschar *, uschar **, const void *);
extern int bdat_getc(unsigned);
extern uschar *bdat_getbuf(unsigned *);
extern BOOL bdat_hasc(void);