Porting of PHP openssl encryption

CSharp · Console

/Program.cs

using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;

public class Program
{
	public static void Main()
	{
		string message = "My secret message 1234";
        string password = "3d756227f8be6f85";
		string ivstr = "ba7e0bb79b61f82d";  
		
		Program p=new Program();

        string encrypted = p.EncryptString(message, password, ivstr);
        string decrypted = p.DecryptString(encrypted, password, ivstr);
		        

		Console.WriteLine(encrypted);
        Console.WriteLine(decrypted);
		
	}
	
	public  string EncryptString(string plainText, string password,string ivstr)
    {
		 byte[] key = Encoding.UTF8.GetBytes(password);
		 byte[] iv = Encoding.UTF8.GetBytes(ivstr);
        // Instantiate a new Aes object to perform string symmetric encryption
        Aes encryptor = Aes.Create();

        encryptor.Mode = CipherMode.CBC;

        // Set key and IV
        byte[] aesKey = new byte[16];
        Array.Copy(key, 0, aesKey, 0, 16);
        encryptor.Key = aesKey;
        encryptor.IV = iv;

        // Instantiate a new MemoryStream object to contain the encrypted bytes
        MemoryStream memoryStream = new MemoryStream();

        // Instantiate a new encryptor from our Aes object
        ICryptoTransform aesEncryptor = encryptor.CreateEncryptor();

        // Instantiate a new CryptoStream object to process the data and write it to the 
        // memory stream
        CryptoStream cryptoStream = new CryptoStream(memoryStream, aesEncryptor, CryptoStreamMode.Write);

        // Convert the plainText string into a byte array
        byte[] plainBytes = Encoding.ASCII.GetBytes(plainText);

        // Encrypt the input plaintext string
        cryptoStream.Write(plainBytes, 0, plainBytes.Length);

        // Complete the encryption process
        cryptoStream.FlushFinalBlock();

        // Convert the encrypted data from a MemoryStream to a byte array
        byte[] cipherBytes = memoryStream.ToArray();

        // Close both the MemoryStream and the CryptoStream
        memoryStream.Close();
        cryptoStream.Close();

        // Convert the encrypted byte array to a base64 encoded string
        string cipherText = Convert.ToBase64String(cipherBytes, 0, cipherBytes.Length);

        // Return the encrypted data as a string
        return cipherText;
    }

    public  string DecryptString(string cipherText,  string password,string ivstr)
    {
		 byte[] key = Encoding.UTF8.GetBytes(password);
		 byte[] iv = Encoding.UTF8.GetBytes(ivstr);
		
        // Instantiate a new Aes object to perform string symmetric encryption
        Aes encryptor = Aes.Create();

        encryptor.Mode = CipherMode.CBC;

        // Set key and IV
        byte[] aesKey = new byte[16];
        Array.Copy(key, 0, aesKey, 0, 16);
        encryptor.Key = aesKey;
        encryptor.IV = iv;

        // Instantiate a new MemoryStream object to contain the encrypted bytes
        MemoryStream memoryStream = new MemoryStream();

        // Instantiate a new encryptor from our Aes object
        ICryptoTransform aesDecryptor = encryptor.CreateDecryptor();

        // Instantiate a new CryptoStream object to process the data and write it to the 
        // memory stream
        CryptoStream cryptoStream = new CryptoStream(memoryStream, aesDecryptor, CryptoStreamMode.Write);

        // Will contain decrypted plaintext
        string plainText = String.Empty;

        try
        {
            // Convert the ciphertext string into a byte array
            byte[] cipherBytes = Convert.FromBase64String(cipherText);

            // Decrypt the input ciphertext string
            cryptoStream.Write(cipherBytes, 0, cipherBytes.Length);

            // Complete the decryption process
            cryptoStream.FlushFinalBlock();

            // Convert the decrypted data from a MemoryStream to a byte array
            byte[] plainBytes = memoryStream.ToArray();

            // Convert the decrypted byte array to string
            plainText = Encoding.ASCII.GetString(plainBytes, 0, plainBytes.Length);
        }
        finally
        {
            // Close both the MemoryStream and the CryptoStream
            memoryStream.Close();
            cryptoStream.Close();
        }

        // Return the decrypted data as a string
        return plainText;
    }
	
	
	
}