void pdkim_init (void);
DLLEXPORT
-pdkim_ctx *pdkim_init_sign (char *, char *, char *, int, BOOL);
+pdkim_ctx *pdkim_init_sign (char *, char *, char *, int,
+ BOOL, int(*)(char *, char *));
DLLEXPORT
pdkim_ctx *pdkim_init_verify (int(*)(char *, char *), BOOL);