public void generateOpcodeTable(int key)
{
if (key == 0)
{
byte[] opcodes = new byte[0xd1]; // d0 + 1
for (int i = 0; i < opcodes.Length; i++)
{
opcodes[i] = (byte)i;
}
short[] exOpcodes = new short[0x4e];
for (int i = 0; i < exOpcodes.Length; i++)
{
exOpcodes[i] = (byte)i;
}
_table = new OpCodeTable(opcodes, exOpcodes);
}
else
{
_table = OpcodeObfuscator.getObfuscatedTable(key);
}
}
public static OpCodeTable getObfuscatedTable(int key)
{
byte[] array = new byte[0xd1];
for (int i = 0; i < array.Length; i++)
{
array[i] = (byte)i;
}
byte tmp;
byte opcode;
int edx = 0;
int ecx = 2;
int edi = 1;
int subKey;
int j = 0;
do
{
//MOVZX EAX,AX
key = rotateKey(key);
subKey = key >> 16;
subKey &= 0x7FFF;
//System.err.printf("SubKey1: %04X\n" , eax);
// CDQ
edx = 0;
// IDIV ECX
//edxeax = (edx << 32) + eax;
//eax = (int) (edxeax / ecx);
edx = subKey % ecx++;
//System.err.printf("SubKey2: %04X - EDX: %04X\n" , eax, edx);
// INC EDI
edi++;
// SKIPPED: DEC EBX (ZF enabler)
// SKIPPED: MOVZX EDX,DL
// MOV CL,BYTE PTR DS:[EDX+ESI+4174]
opcode = array[edx];
// MOV DL,BYTE PTR DS:[EDI-1]
tmp = array[edi - 1];
// MOV BYTE PTR DS:[EAX],DL
array[edx] = tmp;
// MOV BYTE PTR DS:[EDI-1],CL
array[edi - 1] = opcode;
}while (++j < 0xd0);
OpcodeObfuscator.revertOpcodeToOriginal(array, (byte)0x12);
OpcodeObfuscator.revertOpcodeToOriginal(array, (byte)0xb1);
/*for (int i = 0; i < array.length; i++)
* {
* System.err.printf("array[%02X] = %02X\n", i, array[i]);
* }*/
short[] exOpcodes = OpcodeObfuscator.shuffleEx(key);
return(new OpCodeTable(array, exOpcodes));
}