文字列を読み取り可能な文字列として暗号化および復号化したかったのです。
これは、C#Visual Studio 2019 WinFormsでの非常に単純な簡単な例@Pradip
です。
右クリックプロジェクト>プロパティ>設定>を作成username
してpassword
設定を。
これで、作成したばかりの設定を活用できます。ここで私は、保存username
とpassword
しか暗号化password
して、それの立派値フィールド内をuser.config
ファイル。
user.config
ファイル内の暗号化された文字列の例。
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<userSettings>
<secure_password_store.Properties.Settings>
<setting name="username" serializeAs="String">
<value>admin</value>
</setting>
<setting name="password" serializeAs="String">
<value>AQAAANCMnd8BFdERjHoAwE/Cl+sBAAAAQpgaPYIUq064U3o6xXkQOQAAAAACAAAAAAAQZgAAAAEAACAAAABlQQ8OcONYBr9qUhH7NeKF8bZB6uCJa5uKhk97NdH93AAAAAAOgAAAAAIAACAAAAC7yQicDYV5DiNp0fHXVEDZ7IhOXOrsRUbcY0ziYYTlKSAAAACVDQ+ICHWooDDaUywJeUOV9sRg5c8q6/vizdq8WtPVbkAAAADciZskoSw3g6N9EpX/8FOv+FeExZFxsm03i8vYdDHUVmJvX33K03rqiYF2qzpYCaldQnRxFH9wH2ZEHeSRPeiG</value>
</setting>
</secure_password_store.Properties.Settings>
</userSettings>
</configuration>
完全なコード
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Security;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace secure_password_store
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Exit_Click(object sender, EventArgs e)
{
Application.Exit();
}
private void Login_Click(object sender, EventArgs e)
{
if (checkBox1.Checked == true)
{
Properties.Settings.Default.username = textBox1.Text;
Properties.Settings.Default.password = EncryptString(ToSecureString(textBox2.Text));
Properties.Settings.Default.Save();
}
else if (checkBox1.Checked == false)
{
Properties.Settings.Default.username = "";
Properties.Settings.Default.password = "";
Properties.Settings.Default.Save();
}
MessageBox.Show("{\"data\": \"some data\"}","Login Message Alert",MessageBoxButtons.OK, MessageBoxIcon.Information);
}
private void DecryptString_Click(object sender, EventArgs e)
{
SecureString password = DecryptString(Properties.Settings.Default.password);
string readable = ToInsecureString(password);
textBox4.AppendText(readable + Environment.NewLine);
}
private void Form_Load(object sender, EventArgs e)
{
//textBox1.Text = "UserName";
//textBox2.Text = "Password";
if (Properties.Settings.Default.username != string.Empty)
{
textBox1.Text = Properties.Settings.Default.username;
checkBox1.Checked = true;
SecureString password = DecryptString(Properties.Settings.Default.password);
string readable = ToInsecureString(password);
textBox2.Text = readable;
}
groupBox1.Select();
}
static byte[] entropy = Encoding.Unicode.GetBytes("SaLtY bOy 6970 ePiC");
public static string EncryptString(SecureString input)
{
byte[] encryptedData = ProtectedData.Protect(Encoding.Unicode.GetBytes(ToInsecureString(input)),entropy,DataProtectionScope.CurrentUser);
return Convert.ToBase64String(encryptedData);
}
public static SecureString DecryptString(string encryptedData)
{
try
{
byte[] decryptedData = ProtectedData.Unprotect(Convert.FromBase64String(encryptedData),entropy,DataProtectionScope.CurrentUser);
return ToSecureString(Encoding.Unicode.GetString(decryptedData));
}
catch
{
return new SecureString();
}
}
public static SecureString ToSecureString(string input)
{
SecureString secure = new SecureString();
foreach (char c in input)
{
secure.AppendChar(c);
}
secure.MakeReadOnly();
return secure;
}
public static string ToInsecureString(SecureString input)
{
string returnValue = string.Empty;
IntPtr ptr = System.Runtime.InteropServices.Marshal.SecureStringToBSTR(input);
try
{
returnValue = System.Runtime.InteropServices.Marshal.PtrToStringBSTR(ptr);
}
finally
{
System.Runtime.InteropServices.Marshal.ZeroFreeBSTR(ptr);
}
return returnValue;
}
private void EncryptString_Click(object sender, EventArgs e)
{
Properties.Settings.Default.password = EncryptString(ToSecureString(textBox2.Text));
textBox3.AppendText(Properties.Settings.Default.password.ToString() + Environment.NewLine);
}
}
}