public virtual void AES256IGEDecrypt(string sourceFile, string destFile, byte[] iv, byte[] key)
{
int num1;
File file = new File(sourceFile);
File file2 = new File(destFile);
AESFastEngine engine = new AESFastEngine();
engine.init(false, new KeyParameter(key));
byte[] buffer = CryptoUtils.substring(iv, 0x10, 0x10);
byte[] buffer2 = CryptoUtils.substring(iv, 0, 0x10);
BufferedInputStream.__ <clinit>();
BufferedInputStream stream = new BufferedInputStream(new FileInputStream(file));
BufferedOutputStream stream2 = new BufferedOutputStream(new FileOutputStream(file2));
byte[] buffer3 = new byte[0x10];
Label_0060:
num1 = stream.read(buffer3);
if (num1 <= 0)
{
stream2.flush();
stream2.close();
stream.close();
}
else
{
byte[] @in = new byte[0x10];
int index = 0;
while (true)
{
if (index >= 0x10)
{
break;
}
@in[index] = (byte)((sbyte)(buffer3[index] ^ buffer[index]));
index++;
}
engine.processBlock(@in, 0, @in, 0);
index = 0;
while (true)
{
if (index >= 0x10)
{
break;
}
@in[index] = (byte)((sbyte)(@in[index] ^ buffer2[index]));
index++;
}
buffer2 = buffer3;
buffer = @in;
buffer3 = new byte[0x10];
stream2.write(@in);
goto Label_0060;
}
}
public virtual void AES256IGEEncrypt(byte[] src, byte[] dest, int len, byte[] iv, byte[] key)
{
AESFastEngine engine = new AESFastEngine();
engine.init(true, new KeyParameter(key));
int num = len / 0x10;
byte[] buffer = iv;
byte[] buffer2 = iv;
int num2 = 0x10;
int num3 = 0;
for (int i = 0; i < num; i++)
{
int inOff = i * 0x10;
int num6 = 0;
while (true)
{
if (num6 >= 0x10)
{
break;
}
dest[inOff + num6] = (byte)((sbyte)(src[inOff + num6] ^ buffer2[num3 + num6]));
num6++;
}
engine.processBlock(dest, inOff, dest, inOff);
num6 = 0;
while (true)
{
if (num6 >= 0x10)
{
break;
}
dest[inOff + num6] = (byte)((sbyte)(dest[inOff + num6] ^ buffer[num2 + num6]));
num6++;
}
buffer = src;
num2 = inOff;
buffer2 = dest;
num3 = inOff;
}
}
public virtual void AES256IGEDecrypt(byte[] src, byte[] dest, int len, byte[] iv, byte[] key)
{
int expressionStack_AF_0;
AESFastEngine engine = new AESFastEngine();
engine.init(false, new KeyParameter(key));
int num = len / 0x10;
byte[] buffer = iv;
byte[] buffer2 = iv;
int num2 = 0x10;
int num3 = 0;
int num4 = 0;
Label_0029:
if (num4 >= num)
{
return;
}
int inOff = num4 * 0x10;
int num6 = 0;
while (true)
{
if (num6 >= 0x10)
{
break;
}
dest[inOff + num6] = (byte)((sbyte)(src[inOff + num6] ^ buffer[num2 + num6]));
num6++;
}
engine.processBlock(dest, inOff, dest, inOff);
num6 = 0;
while (true)
{
if (num6 >= 0x10)
{
break;
}
dest[inOff + num6] = (byte)((sbyte)(dest[inOff + num6] ^ buffer2[num3 + num6]));
num6++;
}
buffer2 = src;
num3 = inOff;
buffer = dest;
num2 = inOff;
if (0x1f != -1)
{
int expressionStack_AE_1 = num4;
int expressionStack_AE_0 = 0x1f;
expressionStack_AF_0 = expressionStack_AE_1 % expressionStack_AE_0;
goto Label_00AF;
}
else
{
int expressionStack_A9_1 = num4;
}
expressionStack_AF_0 = 0;
Label_00AF:
if (expressionStack_AF_0 == 0x20)
{
try
{
Thread.sleep(10L);
}
catch (InterruptedException exception1)
{
InterruptedException exception2 = ByteCodeHelper.MapException <InterruptedException>(exception1, 1);
Throwable.instancehelper_printStackTrace(exception2);
}
}
num4++;
goto Label_0029;
}