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podświetlone jako qbasic (dodał(a) rzepson99 @ 2022-11-14 16:45:01)

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USING SYSTEM;
USING SYSTEM.Collections.Generic;
USING SYSTEM.ComponentModel;
USING SYSTEM.DATA;
USING SYSTEM.Drawing;
USING SYSTEM.Linq;
USING SYSTEM.Text;
USING SYSTEM.Threading.Tasks;
USING SYSTEM.Windows.Forms;
USING SYSTEM.Security.Cryptography;
 
namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public STRING publicKeyString;
        public STRING privateKeyString;
        public STRING encryptedText;
        public STRING decryptedText;
        public Form1()
        {
            InitializeComponent();
 
        }
 
            private void btnPublic_key_Click(object sender, EventArgs e)
        {
            var cryptoServiceProvider = new RSACryptoServiceProvider(2048); //2048 - Długość klucza
            var publicKey = cryptoServiceProvider.ExportParameters(false); //Generowanie klucza publiczny
            publicKeyString = GetKeyString(publicKey);
            lblPublic_Key.Text = publicKeyString;
 
        }
 
 
        private void btnPrivate_key_Click(object sender, EventArgs e)
        {
            var cryptoServiceProvider = new RSACryptoServiceProvider(2048); //2048 - Długość klucza
            var privateKey = cryptoServiceProvider.ExportParameters(true); //Generowanie klucza prywatnego
            STRING privateKeyString = GetKeyString(privateKey);
            lblPrivate_Key.Text = privateKeyString;
        }
 
        public STATIC STRING GetKeyString(RSAParameters publicKey)
        {
 
            var stringWriter = new SYSTEM.IO.StringWriter();
            var xmlSerializer = new SYSTEM.Xml.Serialization.XmlSerializer(typeof(RSAParameters));
            xmlSerializer.Serialize(stringWriter, publicKey);
            RETURN stringWriter.ToString();
        }
 
        private void btnEncryptiontext_Click(object sender, EventArgs e)
        {
            STRING tekst = textBox_text.Text;
            STRING encryptedText = Encrypt(tekst, publicKeyString); //Szyfrowanie za pomocą klucza publicznego
            lbl_Encryptiontxt.Text = encryptedText;
 
            IF (publicKeyString == null)
            {
                MessageBox.Show("Najpierw wygeneruj kklucz", "Error");
 
            }
        }
 
        public STATIC STRING Encrypt(STRING tekst, STRING publicKeyString)
        {
 
 
 
            var bytesToEncrypt = Encoding.UTF8.GetBytes(tekst);
 
            USING (var rsa = new RSACryptoServiceProvider(2048))
            {
                try
                {
                    IF (publicKeyString == null)
                    {
                        MessageBox.Show("Najpierw wygeneruj kklucz", "Error");
 
                    }
                    ELSE
                    {
                        rsa.FromXmlString(publicKeyString.ToString());
                    }
                        var encryptedData = rsa.Encrypt(bytesToEncrypt, true);
                        var base64Encrypted = Convert.ToBase64String(encryptedData);
                        RETURN base64Encrypted;
 
                }
                finally
                {
                    rsa.PersistKeyInCsp = false;
                }
            }
        }
 
        private void btn_Decrypttxt_Click(object sender, EventArgs e)
        {
            STRING decryptedText = Decrypt(encryptedText, privateKeyString);
            lbl_Decryptiontxt.Text = decryptedText;
        }
 
        public STATIC STRING Decrypt(STRING encryptedText, STRING privateKeyString)
        {
            var bytesToDescrypt = Encoding.UTF8.GetBytes(encryptedText);
 
            USING (var rsa = new RSACryptoServiceProvider(2048))
            {
                try
                {
 
                    // server decrypting DATA with private KEY                    
                    rsa.FromXmlString(privateKeyString);
 
                    var resultBytes = Convert.FromBase64String(encryptedText);
                    var decryptedBytes = rsa.Decrypt(resultBytes, true);
                    var decryptedData = Encoding.UTF8.GetString(decryptedBytes);
                    RETURN decryptedData.ToString();
                }
                finally
                {
                    rsa.PersistKeyInCsp = false;
                }
            }
        }
    }
}
 
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