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solved new crackme

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This commit is contained in:
Chenx221 2024-09-30 13:57:55 +08:00
parent 1d06e419c4
commit f6f6fd0444
Signed by: chenx221
GPG Key ID: D7A9EC07024C3021
13 changed files with 781 additions and 0 deletions
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bengaly_crkme/CRACKME1.EXE Normal file
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bengaly_crkme/CRACKME1_FIX.EXE Normal file
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bengaly_crkme/keygen/keygen1.deps.json Normal file
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{
"runtimeTarget": {
"name": ".NETCoreApp,Version=v8.0",
"signature": ""
},
"compilationOptions": {},
"targets": {
".NETCoreApp,Version=v8.0": {
"keygen1/1.0.0": {
"runtime": {
"keygen1.dll": {}
}
}
}
},
"libraries": {
"keygen1/1.0.0": {
"type": "project",
"serviceable": false,
"sha512": ""
}
}
}

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bengaly_crkme/keygen/keygen1.dll Normal file
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bengaly_crkme/keygen/keygen1.exe Normal file
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bengaly_crkme/keygen/keygen1.runtimeconfig.json Normal file
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{
"runtimeOptions": {
"tfm": "net8.0",
"frameworks": [
{
"name": "Microsoft.NETCore.App",
"version": "8.0.0"
},
{
"name": "Microsoft.WindowsDesktop.App",
"version": "8.0.0"
}
],
"configProperties": {
"System.Reflection.Metadata.MetadataUpdater.IsSupported": false,
"System.Runtime.Serialization.EnableUnsafeBinaryFormatterSerialization": true
}
}
}

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bengaly_crkme/solve.md Normal file
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不清楚是不是兼容问题，这个crackme在winxp、win7都无法显示窗体
1. 修bug
排查了一下
```assembly
0040108B | 6A 00 | push 0 |
0040108D | 6A 00 | push 0 |
0040108F | 6A 00 | push 0 |
00401091 | 68 1F304000 | push crackme1.40301F | 40301F:"MainWindow"
00401096 | FF35 3C314000 | push dword ptr ds:[40313C] |
0040109C | E8 1F020000 | call <JMP.&_CreateDialogParamA@20> |
```
这里call完之后返回值为null，错误`0x57F`
尝试下修一下
```assembly
00401096 | FF35 3C314000 | push dword ptr ds:[40313C] | Patch
00401096 | 6A 00 | push 0 |
00401098 | 90 | nop |
00401099 | 90 | nop |
0040109A | 90 | nop |
0040109B | 90 | nop |
```
2. name
```assembly
0040124B | 55 | push ebp |
0040124C | 8BEC | mov ebp,esp |
0040124E | 53 | push ebx |
0040124F | 51 | push ecx | ecx:_lstrlenA@4+2F
00401250 | 52 | push edx |
00401251 | 57 | push edi |
00401252 | 56 | push esi |
00401253 | 55 | push ebp |
00401254 | 33D2 | xor edx,edx |
00401256 | 8B75 08 | mov esi,dword ptr ss:[ebp+8] |
00401259 | 8B4D 0C | mov ecx,dword ptr ss:[ebp+C] | ecx:_lstrlenA@4+2F
0040125C | 49 | dec ecx | ecx:_lstrlenA@4+2F
0040125D | 0FBE06 | movsx eax,byte ptr ds:[esi] | 循环
00401260 | 2B05 00304000 | sub eax,dword ptr ds:[403000] |
00401266 | 0FBE5E 01 | movsx ebx,byte ptr ds:[esi+1] |
0040126A | 2B1D 04304000 | sub ebx,dword ptr ds:[403004] |
00401270 | 0FAFC3 | imul eax,ebx |
00401273 | 03D0 | add edx,eax |
00401275 | 46 | inc esi |
00401276 | E2 E5 | loop crackme1_fix.40125D |
00401278 | 8BC2 | mov eax,edx |
0040127A | 5D | pop ebp |
0040127B | 5E | pop esi |
0040127C | 5F | pop edi |
0040127D | 5A | pop edx |
0040127E | 59 | pop ecx | ecx:_lstrlenA@4+2F
0040127F | 5B | pop ebx |
00401280 | C9 | leave |
00401281 | C2 0800 | ret 8 |
```
```c#
string name = "userinput";
int ecx = name.Length - 1;
int index = 0;
int edx = 0;
while (ecx > 0)
{
char c = (char)(name[index] - '*');
char c2 = (char)(name[index + 1] - 'A');
c = (char)(c * c2);
edx += (int)c;
index++;
ecx--;
}
```
Name（不能使用数字）会计算出一个edx值
3. Serial
```assembly
00401284 | 55 | push ebp |
00401285 | 8BEC | mov ebp,esp |
00401287 | 53 | push ebx |
00401288 | 51 | push ecx | ecx:_lstrlenA@4+2F
00401289 | 52 | push edx |
0040128A | 56 | push esi |
0040128B | 57 | push edi |
0040128C | 55 | push ebp |
0040128D | 8B75 08 | mov esi,dword ptr ss:[ebp+8] |
00401290 | 8B4D 0C | mov ecx,dword ptr ss:[ebp+C] | ecx:_lstrlenA@4+2F
00401293 | 33D2 | xor edx,edx |
00401295 | 0FB64431 FF | movzx eax,byte ptr ds:[ecx+esi-1] |
0040129A | 83E8 30 | sub eax,30 |
0040129D | 51 | push ecx | ecx:_lstrlenA@4+2F
0040129E | 8BD9 | mov ebx,ecx | ecx:_lstrlenA@4+2F
004012A0 | 2B4D 0C | sub ecx,dword ptr ss:[ebp+C] | ecx:_lstrlenA@4+2F
004012A3 | F7D9 | neg ecx | ecx:_lstrlenA@4+2F
004012A5 | 85C9 | test ecx,ecx | ecx:_lstrlenA@4+2F
004012A7 | 74 05 | je crackme1_fix.4012AE |
004012A9 | 6BC0 0A | imul eax,eax,A |
004012AC | E2 FB | loop crackme1_fix.4012A9 |
004012AE | 59 | pop ecx | ecx:_lstrlenA@4+2F
004012AF | 03D0 | add edx,eax |
004012B1 | E2 E2 | loop crackme1_fix.401295 |
004012B3 | 8BC2 | mov eax,edx |
004012B5 | 5D | pop ebp |
004012B6 | 5F | pop edi |
004012B7 | 5E | pop esi |
004012B8 | 5A | pop edx |
004012B9 | 59 | pop ecx | ecx:_lstrlenA@4+2F
004012BA | 5B | pop ebx |
004012BB | C9 | leave |
004012BC | C2 0800 | ret 8 |
```
这里似乎只是将传入的serial字符串转成整形，后面比较用

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bengaly_crkme/source/keygen1.sln Normal file
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Microsoft Visual Studio Solution File, Format Version 12.00
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MinimumVisualStudioVersion = 10.0.40219.1
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "keygen1", "keygen1\keygen1.csproj", "{D0E162E3-FC99-4405-BEE1-AB85D9D41DA9}"
EndProject
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "keygen2", "keygen2\keygen2.csproj", "{2446CB50-1882-4219-9DB0-E7F5517E6E20}"
EndProject
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "keygen3", "keygen3\keygen3.csproj", "{BC47A6DE-7F9D-4D65-A996-69FB778C95F3}"
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "GiveMeSerial", "GiveMeSerial\GiveMeSerial.vcxproj", "{E3604156-7DF2-4B5F-AECA-64786B92F38C}"
EndProject
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219
bengaly_crkme/source/keygen1/Form1.Designer.cs generated Normal file
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namespace keygen1
{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
button1 = new Button();
label1 = new Label();
textBox1 = new TextBox();
label2 = new Label();
textBox2 = new TextBox();
label3 = new Label();
checkBox1 = new CheckBox();
button2 = new Button();
button3 = new Button();
label4 = new Label();
textBox3 = new TextBox();
button4 = new Button();
label5 = new Label();
textBox4 = new TextBox();
SuspendLayout();
//
// button1
//
button1.Location = new Point(393, 2);
button1.Name = "button1";
button1.Size = new Size(93, 172);
button1.TabIndex = 0;
button1.Text = "Generate";
button1.UseVisualStyleBackColor = true;
button1.Click += Button1_Click;
//
// label1
//
label1.AutoSize = true;
label1.Location = new Point(30, 18);
label1.Name = "label1";
label1.Size = new Size(39, 15);
label1.TabIndex = 1;
label1.Text = "Name";
//
// textBox1
//
textBox1.Location = new Point(75, 14);
textBox1.Name = "textBox1";
textBox1.Size = new Size(262, 23);
textBox1.TabIndex = 2;
//
// label2
//
label2.AutoSize = true;
label2.Location = new Point(34, 51);
label2.Name = "label2";
label2.Size = new Size(35, 15);
label2.TabIndex = 3;
label2.Text = "Serial";
//
// textBox2
//
textBox2.Location = new Point(75, 47);
textBox2.Name = "textBox2";
textBox2.Size = new Size(262, 23);
textBox2.TabIndex = 4;
//
// label3
//
label3.AutoSize = true;
label3.Location = new Point(312, 155);
label3.Name = "label3";
label3.Size = new Size(75, 15);
label3.TabIndex = 5;
label3.Text = "By Chenx221";
//
// checkBox1
//
checkBox1.AutoSize = true;
checkBox1.Location = new Point(75, 155);
checkBox1.Name = "checkBox1";
checkBox1.Size = new Size(89, 19);
checkBox1.TabIndex = 6;
checkBox1.Text = "Auto Mode ";
checkBox1.UseVisualStyleBackColor = true;
//
// button2
//
button2.Location = new Point(343, 13);
button2.Name = "button2";
button2.Size = new Size(44, 24);
button2.TabIndex = 7;
button2.Text = "Copy";
button2.UseVisualStyleBackColor = true;
button2.Click += Button2_Click;
//
// button3
//
button3.Location = new Point(343, 47);
button3.Name = "button3";
button3.Size = new Size(44, 23);
button3.TabIndex = 8;
button3.Text = "Copy";
button3.UseVisualStyleBackColor = true;
button3.Click += Button3_Click;
//
// label4
//
label4.AutoSize = true;
label4.Location = new Point(10, 82);
label4.Name = "label4";
label4.Size = new Size(59, 15);
label4.TabIndex = 9;
label4.Text = "Company";
label4.Visible = false;
//
// textBox3
//
textBox3.Location = new Point(75, 79);
textBox3.Name = "textBox3";
textBox3.Size = new Size(262, 23);
textBox3.TabIndex = 10;
textBox3.Visible = false;
//
// button4
//
button4.Location = new Point(343, 79);
button4.Name = "button4";
button4.Size = new Size(44, 23);
button4.TabIndex = 11;
button4.Text = "Copy";
button4.UseVisualStyleBackColor = true;
button4.Visible = false;
button4.Click += Button4_Click;
//
// label5
//
label5.AutoSize = true;
label5.Location = new Point(31, 116);
label5.Name = "label5";
label5.Size = new Size(35, 15);
label5.TabIndex = 12;
label5.Text = "Serial";
label5.Visible = false;
//
// textBox4
//
textBox4.Location = new Point(75, 113);
textBox4.Name = "textBox4";
textBox4.Size = new Size(262, 23);
textBox4.TabIndex = 13;
textBox4.Visible = false;
//
// Form1
//
AutoScaleDimensions = new SizeF(7F, 15F);
AutoScaleMode = AutoScaleMode.Font;
ClientSize = new Size(491, 183);
Controls.Add(textBox4);
Controls.Add(label5);
Controls.Add(button4);
Controls.Add(textBox3);
Controls.Add(label4);
Controls.Add(button3);
Controls.Add(button2);
Controls.Add(checkBox1);
Controls.Add(label3);
Controls.Add(textBox2);
Controls.Add(label2);
Controls.Add(textBox1);
Controls.Add(label1);
Controls.Add(button1);
FormBorderStyle = FormBorderStyle.FixedSingle;
MaximizeBox = false;
Name = "Form1";
Text = "KeyGen For bengaly_crkme";
ResumeLayout(false);
PerformLayout();
}
#endregion
private Button button1;
private Label label1;
private TextBox textBox1;
private Label label2;
private TextBox textBox2;
private Label label3;
private CheckBox checkBox1;
private Button button2;
private Button button3;
private Label label4;
private TextBox textBox3;
private Button button4;
private Label label5;
private TextBox textBox4;
}
}

151
bengaly_crkme/source/keygen1/Form1.cs Normal file
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using System.Runtime.InteropServices;
using System.Text;
using System.Text.RegularExpressions;
using static System.Windows.Forms.VisualStyles.VisualStyleElement.TaskbarClock;
namespace keygen1
{
public partial class Form1 : Form
{
[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
static extern IntPtr FindWindow(string? lpClassName, string lpWindowName);
[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr GetDlgItem(IntPtr hDlg, int nIDDlgItem);
[DllImport("user32.dll", CharSet = CharSet.Unicode, SetLastError = false)]
static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, StringBuilder? lParam);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = false)]
static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
const uint WM_SETTEXT = 0x000C;
const uint BM_CLICK = 0x00F5;
public Form1()
{
InitializeComponent();
}
private void Button1_Click(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(textBox1.Text))
{
MessageBox.Show("Name不能为空");
return;
}
//if (string.IsNullOrEmpty(textBox2.Text))
//{
// MessageBox.Show("First Name不能为空");
// return;
//}
//if (string.IsNullOrEmpty(textBox3.Text))
//{
// MessageBox.Show("Company不能为空");
// return;
//}
//Generate(textBox1.Text, textBox2.Text, textBox3.Text);
Generate(textBox1.Text);
}
private void Generate(string username)
{
if (username.Length <= 1)
{
MessageBox.Show("Name长度需大于1位");
return;
}
if(Regex.IsMatch(username, @"\d"))
{
MessageBox.Show("Name不允许包含数字");
return;
}
string? key = GenerateKey(username);
if (key == null)
{
MessageBox.Show("生成Key失败");
return;
}
//if (!int.TryParse(username, out int serial1))
//{
// MessageBox.Show("Serial1不是有效数字");
// return;
//}
//string key = GenerateKey(serial1);
//textBox4.Text = string.Join("-", key);
textBox2.Text = key;
if (checkBox1.Checked) AutoMode(username,key);
//禁用，由于controlId不固定
}
private static string? GenerateKey(string name)
{
int edx = 0;
for (int index = 0; index < name.Length - 1; index++)
{
char c = (char)((name[index] - '*') * (name[index + 1] - 'A'));
edx += c;
}
return edx.ToString();
}
private static void AutoMode(string username, string key)
{
string windowTitle = "Crack The Hell Out Of Me By Bengaly";
IntPtr hWnd = FindWindow(null, windowTitle);
if (hWnd == IntPtr.Zero)
{
MessageBox.Show("窗口未找到");
return;
}
int usernameControlId = 0x6A;
int serialControlId = 0x6B;
int submitButtonId = 0x6C;
IntPtr usernameHwnd = GetDlgItem(hWnd, usernameControlId);
IntPtr serialHwnd = GetDlgItem(hWnd, serialControlId);
IntPtr submitButtonHwnd = GetDlgItem(hWnd, submitButtonId);
if (usernameHwnd == IntPtr.Zero || serialHwnd == IntPtr.Zero || submitButtonHwnd == IntPtr.Zero)
{
MessageBox.Show("控件未找到");
return;
}
StringBuilder usernameToSet = new(username);
StringBuilder serialToSet = new(key);
SendMessage(usernameHwnd, WM_SETTEXT, IntPtr.Zero, usernameToSet);
SendMessage(serialHwnd, WM_SETTEXT, IntPtr.Zero, serialToSet);
SendMessage(submitButtonHwnd, BM_CLICK, IntPtr.Zero, IntPtr.Zero);
}
private void Button2_Click(object sender, EventArgs e)
{
if (!string.IsNullOrEmpty(textBox1.Text))
{
Clipboard.SetText(textBox1.Text);
}
}
private void Button3_Click(object sender, EventArgs e)
{
if (!string.IsNullOrEmpty(textBox2.Text))
{
Clipboard.SetText(textBox2.Text);
}
}
private void Button4_Click(object sender, EventArgs e)
{
if (!string.IsNullOrEmpty(textBox3.Text))
{
Clipboard.SetText(textBox3.Text);
}
}
}
}

120
bengaly_crkme/source/keygen1/Form1.resx Normal file
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@ -0,0 +1,120 @@
<?xml version="1.0" encoding="utf-8"?>
<root>
<!--
Microsoft ResX Schema
Version 2.0
The primary goals of this format is to allow a simple XML format
that is mostly human readable. The generation and parsing of the
various data types are done through the TypeConverter classes
associated with the data types.
Example:
... ado.net/XML headers & schema ...
<resheader name="resmimetype">text/microsoft-resx</resheader>
<resheader name="version">2.0</resheader>
<resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
<resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
<data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
<data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
<data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
<value>[base64 mime encoded serialized .NET Framework object]</value>
</data>
<data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
<value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
<comment>This is a comment</comment>
</data>
There are any number of "resheader" rows that contain simple
name/value pairs.
Each data row contains a name, and value. The row also contains a
type or mimetype. Type corresponds to a .NET class that support
text/value conversion through the TypeConverter architecture.
Classes that don't support this are serialized and stored with the
mimetype set.
The mimetype is used for serialized objects, and tells the
ResXResourceReader how to depersist the object. This is currently not
extensible. For a given mimetype the value must be set accordingly:
Note - application/x-microsoft.net.object.binary.base64 is the format
that the ResXResourceWriter will generate, however the reader can
read any of the formats listed below.
mimetype: application/x-microsoft.net.object.binary.base64
value : The object must be serialized with
: System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
: and then encoded with base64 encoding.
mimetype: application/x-microsoft.net.object.soap.base64
value : The object must be serialized with
: System.Runtime.Serialization.Formatters.Soap.SoapFormatter
: and then encoded with base64 encoding.
mimetype: application/x-microsoft.net.object.bytearray.base64
value : The object must be serialized into a byte array
: using a System.ComponentModel.TypeConverter
: and then encoded with base64 encoding.
-->
<xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
<xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
<xsd:element name="root" msdata:IsDataSet="true">
<xsd:complexType>
<xsd:choice maxOccurs="unbounded">
<xsd:element name="metadata">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="value" type="xsd:string" minOccurs="0" />
</xsd:sequence>
<xsd:attribute name="name" use="required" type="xsd:string" />
<xsd:attribute name="type" type="xsd:string" />
<xsd:attribute name="mimetype" type="xsd:string" />
<xsd:attribute ref="xml:space" />
</xsd:complexType>
</xsd:element>
<xsd:element name="assembly">
<xsd:complexType>
<xsd:attribute name="alias" type="xsd:string" />
<xsd:attribute name="name" type="xsd:string" />
</xsd:complexType>
</xsd:element>
<xsd:element name="data">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
<xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
</xsd:sequence>
<xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
<xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
<xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
<xsd:attribute ref="xml:space" />
</xsd:complexType>
</xsd:element>
<xsd:element name="resheader">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
</xsd:sequence>
<xsd:attribute name="name" type="xsd:string" use="required" />
</xsd:complexType>
</xsd:element>
</xsd:choice>
</xsd:complexType>
</xsd:element>
</xsd:schema>
<resheader name="resmimetype">
<value>text/microsoft-resx</value>
</resheader>
<resheader name="version">
<value>2.0</value>
</resheader>
<resheader name="reader">
<value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
</resheader>
<resheader name="writer">
<value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
</resheader>
</root>

17
bengaly_crkme/source/keygen1/Program.cs Normal file
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namespace keygen1
{
internal static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
// To customize application configuration such as set high DPI settings or default font,
// see https://aka.ms/applicationconfiguration.
ApplicationConfiguration.Initialize();
Application.Run(new Form1());
}
}
}

31
bengaly_crkme/source/keygen1/keygen1.csproj Normal file
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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>WinExe</OutputType>
<TargetFramework>net8.0-windows</TargetFramework>
<Nullable>enable</Nullable>
<UseWindowsForms>true</UseWindowsForms>
<ImplicitUsings>enable</ImplicitUsings>
<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
<Platforms>AnyCPU;x86</Platforms>
<Authors>chenx221</Authors>
<Company>chenx221</Company>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
<DebugType>portable</DebugType>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x86'">
<DebugType>portable</DebugType>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
<DebugType>portable</DebugType>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x86'">
<DebugType>portable</DebugType>
</PropertyGroup>
</Project>