char *str; des_cblock (*key1); des_cblock (*key2);
const char *str; des_cblock key1; des_cblock key2;
void des_string_to_2keys(str, key1, key2)char *str;des_cblock (*key1);des_cblock (*key2);	{	des_key_schedule ks;	int i,length;	register unsigned char j;	memset(key1,0,8);	memset(key2,0,8);	length=strlen(str);#ifdef OLD_STR_TO_KEY	if (length <= 8)		{		for (i=0; i<length; i++)			{			(*key2)[i]=(*key1)[i]=(str[i]<<1);			}		}	else		{		for (i=0; i<length; i++)			{			if ((i/8)&1)				(*key2)[i%8]^=(str[i]<<1);			else				(*key1)[i%8]^=(str[i]<<1);			}		}#else /* MIT COMPATIBLE */	for (i=0; i<length; i++)		{		j=str[i];		if ((i%32) < 16)			{			if ((i%16) < 8)				(*key1)[i%8]^=(j<<1);			else				(*key2)[i%8]^=(j<<1);			}		else			{			j=((j<<4)&0xf0)|((j>>4)&0x0f);			j=((j<<2)&0xcc)|((j>>2)&0x33);			j=((j<<1)&0xaa)|((j>>1)&0x55);			if ((i%16) < 8)				(*key1)[7-(i%8)]^=j;			else				(*key2)[7-(i%8)]^=j;			}		}	if (length <= 8) memcpy(key2,key1,8);#endif	des_set_odd_parity((des_cblock *)key1);	des_set_odd_parity((des_cblock *)key2);	i=des_check_key;	des_check_key=0;	des_set_key((des_cblock *)key1,ks);	des_cbc_cksum((des_cblock *)str,(des_cblock *)key1,(long)length,ks,		(des_cblock *)key1);	des_set_key((des_cblock *)key2,ks);	des_cbc_cksum((des_cblock *)str,(des_cblock *)key2,(long)length,ks,		(des_cblock *)key2);	des_check_key=i;	memset(ks,0,sizeof(ks));	des_set_odd_parity(key1);	des_set_odd_parity(key2);	}