#include<sys/types.h>

struct packedkey { 
   short int pk_daycut;   
   unsigned char pk_root[3];
   unsigned char pk_tomorrow[4];
   unsigned char pk_today[8]; 
   char pk_key_serial_number[12]; 
   char spare[3]; 
};
typedef struct packedkey PACKEDKEY;

struct Keyinfo { 
  short int DayCut;
  char Root[23];
  char Tomorrow[32]; 
  char Today[64]; 
};
typedef struct Keyinfo KeyInfo;

extern short int Year /* 0x2585e */;
extern short int Month /* 0x25892 */;
extern short int Day /* 0x2592c */;
extern short int Hour /* 0x2580c */;

short int LoadKeyInfo2 (struct packedkey /* id 5 */ *pk /* 0x44 */, caddr_t keyfile /* 0x48 */, caddr_t username /* 0x4c */);
void GenerateChallengeBits (short int Randnum /* 0xffffffee */, caddr_t Stim /* 0x48 */);
short int VerifyResponse(struct packedkey *PackedKeyInfo, caddr_t Stim, caddr_t Answer);
static void unpack(struct packedkey *packedp, struct Keyinfo *unpackedp);
static void UnMapAnswer(caddr_t Answer, caddr_t f);
static void MapAnswer(caddr_t Answer, caddr_t f);
caddr_t PrintBitStr(caddr_t data, int count, caddr_t addendum);
void GetDate();
static short unsigned int GetChanges(short unsigned int DayCut /*0xffffffee*/, char Isodd /*0xffffffed*/);
void ApplyChanges(caddr_t Td0 /*0x44*/, caddr_t Tm0 /*0x48*/, short unsigned int ChgCount /*0xffffffee*/, caddr_t Td1 /*0x50*/);
static void InvertAnswer(caddr_t f0 /*0x44*/, caddr_t Td /*0x48*/, caddr_t f1 /*0x4c*/);
static void DeriveAnswer(caddr_t f0 /*0x44*/, caddr_t Td /*0x48*/, caddr_t f1 /*0x4c*/);
static char nnot(char c /* 0xffffffef */);
int HexToVal(caddr_t buf /*0x44*/, caddr_t data /*0x48*/, int count /*0x4c*/);
unsigned char hch2val (char a_byte /* 0xffffffef */);
static short unsigned int ord (short unsigned int c /* 0xffffffee */);