#ifndef _PCSC_CR_H
#define _PCSC_CR_H
-long pcsc_cr(unsigned char *chal, int csize, unsigned char *resp, int *rsize);
+int pcsc_option(const char *option);
+long pcsc_cr(const unsigned char *chal, const int csize,
+ unsigned char *resp, int *rsize);
char *pcsc_errstr(long err);
#endif