www.pudn.com > schdlock.zip > LOCKD2.C

#include 
#include 
#include 
#include 
#include 
void ReadStr(char *str) 
{ 
 unsigned char Plength=1; 
 unsigned xx,yy,x; 
 union REGS r; 
 xx=wherex(); 
 yy=wherey(); 
 x=xx; 
 do{ 
     gotoxy(xx,yy); 
     r.h.ah=0; 
     int86(0x16,&r,&r); 
     if((r.h.ah!=28)&&(r.h.ah!=14)&&(r.h.ah!=1)) 
     { 
      *(str+Plength)=(r.h.al-20)|0x80; 
      gotoxy(xx,yy); 
      putch('*'); 
      xx++; 
      Plength++; 
     } 
     else if(r.h.ah==14) 
          { 
           xx--; 
           if(xx1)Plength--; 
          } 
          else if(r.h.ah==1)Plength=0; 
    }while((r.h.ah!=28)&&(r.h.ah!=1)&&(Plength<15)); 
    *(str+0)=Plength-1; 
} 
int CheckPass(char *src,char *dest) 
{ 
 unsigned char Plength,p2; 
 Plength=*(src+0); 
 p2=*(dest+0); 
 if(Plength!=p2)return -1; 
 while(Plength>0) 
 { 
  if(*(src+Plength)!=*(dest+Plength))return -1; 
  Plength--; 
 } 
 return 1; 
} 
int CopyPass(char *src,char *dest) 
{ 
 char Plength; 
 Plength=*(src+0); 
 while(Plength>=0) 
 { 
  *(dest+Plength)=*(src+Plength); 
  Plength--; 
 } 
 return 0; 
} 
int main() 
{ 
 unsigned char buf[512],part[512],temp[512],k; 
 int i,flag,lock=0,wrong=0; 
 char *pass; 
 char passwd1[16],passwd2[16]; 
 printf("Yaking (R) Logic Driver D: Locker version 2.1\n"); 
 printf("Copyright (C) 1997.12 ,Yaking Software Studio.\n\n"); 
 if(biosdisk(0x02,0x80,0,0,1,1,buf)) 
 { 
   printf("Read Master Boot Sector error!\a\n"); 
   exit(0); 
 } 
 if(biosdisk(0x02,0x80,0,0,14,1,part)||biosdisk(0x02,0x80,0,0,14,1,temp)) 
 { 
   printf("Read Backup Info error!\a\n"); 
   exit(0); 
 } 
 if((buf[0x182]=='B')&&(buf[0x183]=='a')&&(buf[0x184]=='b')&&(buf[0x185]=='y') 
  &&(buf[0x186]=='s')&&(buf[0x187]=='o')&&(buf[0x188]=='f')&&(buf[0x189]=='t') 
  &&(buf[0x18A]==' ')&&(buf[0x18B]=='L')&&(buf[0x18C]=='o')&&(buf[0x18D]=='c') 
  &&(buf[0x18E]=='k')&&(buf[0x18F]=='d')&&(buf[0x190]==' ')&&(buf[0x191]=='v') 
  &&(buf[0x192]=='2')&&(buf[0x193]=='.')&&(buf[0x194]=='0'))lock=1; 
 if(part[0x1BE]==0x10&&part[0x1BF]==0x11)flag=1; 
 else flag=0; 
 for(i=0;i<16;i++) 
 { 
  if(temp[i]!=0&&temp[i]!=0xFF)temp[i]=~temp[i]; 
  if(temp[i]!=buf[0x1BE+i])wrong=1; 
 } 
 switch(lock) 
 { 
  case 1: 
       if(wrong) 
       { 
	printf("Backup Info was destroyed by Virus or other programs!\a\n"); 
        printf("Use HDMBG.EXE to restore Partition.\n"); 
        exit(0); 
       } 
       if(flag==1) 
       { 
        printf("Logic Driver D: has been locked before.\n"); 
        printf("Unlock it?(Y/N)"); 
        k=getch(); 
        k=k|0x20; 
        if(k=='y') 
	{ 
	 printf("\nPassword: "); 
	 ReadStr(passwd1); 
	 pass=part+0x5E; 
	 CopyPass(pass,passwd2); 
	 if(CheckPass(passwd2,passwd1)!=1) 
	 { 
	  printf("\n\aPassword error! Unlock failed."); 
	  exit(1); 
	 } 
	 part[0x1BE]=0x00;part[0x1BF]=0x00; 
	 for(i=0;i<48;i++) 
	 { 
	  if(part[i+16]!=0x00&&part[i+16]!=0xFF)buf[0x1CE+i]=~part[16+i]; 
	 } 
	 if(biosdisk(0x03,0x80,0,0,1,1,buf)||biosdisk(0x03,0x80,0,0,14,1,part)) 
	 { 
	  printf("\nUnlock Driver D: error!\a\n"); 
	  exit(0); 
	 } 
	 printf("\nUnlock Driver D: ok.\n"); 
	 break; 
	} 
	else return 0; 
       } 
       if(flag==0) 
       { 
	part[0x1BE]=0x10;part[0x1BF]=0x11; 
	for(i=0;i<48;i++)buf[0x1CE+i]=0; 
	if(biosdisk(0x03,0x80,0,0,1,1,buf)||biosdisk(0x03,0x80,0,0,14,1,part)) 
	{ 
	 printf("Lock Driver D: failed!\a\n"); 
	 exit(0); 
	} 
	printf("Locked Driver D: ok.\n"); 
	break; 
       } 
  case 0: 
       printf("Are you using Yakingsoft-Locker v2.1 on this Hard Disk first?\n\a"); 
       printf("If yes.Please use HDMBG.EXE to Backup Master Boot Sector!\n"); 
       printf("\nAfter do it...\n"); 
       printf("If you can't unlock Driver D:,HDMBG.EXE can help you to restore Partition.\n"); 
       printf("\nQuit and Use HDMBG.EXE to Backup?(Y/N)"); 
       k=getch();k=k|0x20; 
       if(k=='y'){exit(0);} 
       buf[0x182]='B';buf[0x183]='a';buf[0x184]='b';buf[0x185]='y'; 
       buf[0x186]='s';buf[0x187]='o';buf[0x188]='f';buf[0x189]='t'; 
       buf[0x18A]=' ';buf[0x18B]='L';buf[0x18C]='o';buf[0x18D]='c'; 
       buf[0x18E]='k';buf[0x18F]='d';buf[0x190]=' ';buf[0x191]='v'; 
       buf[0x192]='2';buf[0x193]='.';buf[0x194]='0'; 
       for(i=0;i<32;i++)buf[0x195+i]=0x00; 
       for(i=0;i<512;i++) 
       {part[i]=0x00;} 
       part[0x1BE]=0x10;part[0x1BF]=0x11; 
       for(i=0;i<16;i++) 
       { 
	if(buf[0x1BE+i]!=0x00&&buf[0x1BE+i]!=0xFF)part[i]=~buf[0x1BE+i]; 
       } 
       for(i=0;i<48;i++) 
       { 
	if(buf[0x1CE+i]!=0x00&&buf[0x1CE+i]!=0xFF)part[16+i]=~buf[0x1CE+i]; 
	buf[0x1CE+i]=0x00; 
       } 
       printf("\nPassword: "); 
       ReadStr(passwd1); 
       printf("\nVerify  : "); 
       ReadStr(passwd2); 
       if(CheckPass(passwd1,passwd2)!=1) 
       { 
	printf("\n\aPassword verify error!!! "); 
	exit(1); 
       } 
       pass=part+0x5E; 
       CopyPass(passwd1,pass); 
       if(biosdisk(0x03,0x80,0,0,1,1,buf)||biosdisk(0x03,0x80,0,0,14,1,part)) 
       { 
	printf("\nLock Driver D: failed!\a\n"); 
	exit(0); 
       } 
       printf("\nLocked Driver D: ok.\n"); 
       break; 
  } 
  printf("Reboot system to enable the change?(Y/N)"); 
  k=getch();k=k|0x20; 
  if(k=='y') 
  { 
   asm mov ax,0xf000 
   asm push ax 
   asm mov ax,0xfff0 
   asm push ax 
   asm retf 
  } 
  return 0; 
}