extern uint CRCTab[256];
 
 void CryptData::SetKey13(const char *Password)
 {
   Key13[0]=Key13[1]=Key13[2]=0;
   for (size_t I=0;Password[I]!=0;I++)
   {
     byte P=Password[I];
     Key13[0]+=P;
     Key13[1]^=P;
     Key13[2]+=P;
     Key13[2]=(byte)rotls(Key13[2],1,8);
   }
 }
 
 
 void CryptData::SetKey15(const char *Password)
 {
   InitCRC32(CRCTab);
   uint PswCRC=CRC32(0xffffffff,Password,strlen(Password));
   Key15[0]=PswCRC&0xffff;
   Key15[1]=(PswCRC>>16)&0xffff;
   Key15[2]=Key15[3]=0;
   for (size_t I=0;Password[I]!=0;I++)
   {
     byte P=Password[I];
     Key15[2]^=P^CRCTab[P];
     Key15[3]+=P+(CRCTab[P]>>16);
   }
 }
 
 
 void CryptData::SetAV15Encryption()
 {
   InitCRC32(CRCTab);
   Method=CRYPT_RAR15;
   Key15[0]=0x4765;
   Key15[1]=0x9021;
   Key15[2]=0x7382;
   Key15[3]=0x5215;
 }
 
 
 void CryptData::SetCmt13Encryption()
 {
   Method=CRYPT_RAR13;
   Key13[0]=0;
   Key13[1]=7;
   Key13[2]=77;
 }
 
 
 void CryptData::Decrypt13(byte *Data,size_t Count)
 {
   while (Count--)
   {
     Key13[1]+=Key13[2];
     Key13[0]+=Key13[1];
     *Data-=Key13[0];
     Data++;
   }
 }
 
 
 void CryptData::Crypt15(byte *Data,size_t Count)
 {
   while (Count--)
   {
     Key15[0]+=0x1234;
     Key15[1]^=CRCTab[(Key15[0] & 0x1fe)>>1];
     Key15[2]-=CRCTab[(Key15[0] & 0x1fe)>>1]>>16;
     Key15[0]^=Key15[2];
     Key15[3]=rotrs(Key15[3]&0xffff,1,16)^Key15[1];
     Key15[3]=rotrs(Key15[3]&0xffff,1,16);
     Key15[0]^=Key15[3];
     *Data^=(byte)(Key15[0]>>8);
     Data++;
   }
 }