Moving passwords.

TonyZero12 · August 2023

Is there a way to migrate my %localappdata%\LINQPad\Passwords to a new laptop? Or backup this file in my 1Password?

I am not familiar with how DPAPI decrypts these passwords. I assume the key to them is somewhere I would not be able to migrate?

JoeAlbahari · August 2023

There is no export/import feature - you would have to write this yourself. If you want to go down this path, press Shift+Alt+R to bring up ILSpy, then take a look at LINQPad's PasswordManager class - this has the info you need.

CraigVenz · October 16

Having had to just do this myself, thought I'd post here.

void Main()
{
  Util.HtmlHead.AddStyles("table tr td:nth-child(2) { word-wrap: break-word; max-width: 1000px }");

  var userDataFiles = new DirectoryInfo(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "LINQPad", "UserData"))
      .Dump("UserData Folder Path")
      .EnumerateFiles()
      .OrderByDescending(x=>x.LastWriteTime);

  userDataFiles.Select(x => new {
        x.Name,
        Content = x.OpenText().Using(f =>
        {
            var str = new char[250];
            f.ReadBlock(str, 0, (int)Math.Min(f.BaseStream.Length, 250L));
            var sb = new StringBuilder().Append(new string(str).TrimEnd('\0'))
                                        .Append(f.BaseStream.Length > 250 ? "..." : string.Empty);
            return sb.ToString();
        }),
        LastWrite = x.LastWriteTime.Humanize(),
        File = new Hyperlink("Open", _ => Shortcuts.OpenNotepadPP(x.FullName))
  })
  .Dump("LoadString keys");

  new Button("Export User Data", _ => {
        new TextArea(JsonConvert.SerializeObject(userDataFiles.ToDictionary(df => df.Name, df => Convert.ToBase64String(df.ReadAllBytes())))).Dump();
  }).Dump();

  var passwords = new DirectoryInfo(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "LINQPad", "Passwords")).Dump("Passwords Folder Path")
    .EnumerateFiles()
    .OrderByDescending(x => x.LastWriteTime)
    .Select(x =>
    {
        var name = Encoding.UTF8.GetString(Enumerable.Range(0, x.Name.Length)
                                                     .Where(x => x % 2 == 0)
                                                     .Select(i => Convert.ToByte(x.Name.Substring(i, 2), 16))
                                                     .ToArray());
        return new {
            Name = name,
            LastWrite = x.LastWriteTime.Humanize(),
            Content = Util.OnDemand("Click to show", () => Util.GetPassword(name))
        };
    })
    .Dump("Passwords");

    new Button("Export Passwords", _ => {
        new TextArea(JsonConvert.SerializeObject(passwords.ToDictionary(df => df.Name, df => Convert.ToBase64String(Encoding.UTF8.GetBytes(Util.GetPassword(df.Name)))))).Dump();
    }).Dump();
}

public static class Shortcuts
{
    static string Quote(string s) => s.Contains(" ") ? $"\"{s}\"" : s;
    public static void OpenNotepadPP(string f)
    {
        var progDir = Environment.GetEnvironmentVariable("ProgramFiles(x86)");
        var npDir = Path.Combine("Notepad++", "notepad++.exe");
        Util.Cmd($"{Quote(Path.Combine(progDir, npDir))} {Quote(f)}");
    }
    public static byte[] ReadAllBytes(this FileInfo f) => !f.Exists ? Array.Empty<byte>() : File.ReadAllBytes(f.FullName);
    public static TReturn? Using<TDisposable, TReturn>(this TDisposable disposable, Func<TDisposable, TReturn> workFunc) where TDisposable : IDisposable
    {
        using (disposable)
        {
            return workFunc(disposable);
        }
    }
}

and to import afterwards:

const string LoadStringType = "Util.LoadString";
const string PasswordType = "Util.Password";
var importType = new SelectBox(SelectBoxKind.DropDown, new[] { LoadStringType, PasswordType }).Dump("Import type");
var ta = new TextArea().Dump("Paste your json here");
new Button("Import",_ => {
    var dict = JsonConvert.DeserializeObject<Dictionary<string,string>>(ta.Text);
    Action<string,string> importFunc = importType.SelectedOption switch {
        LoadStringType => (a,b) => Util.SaveString(a,b),
        PasswordType => (a,b) => Util.SetPassword(a,b)
    };
    foreach (var pair in dict)
    {
        Console.WriteLine("Saving string '{0}'", pair.Key);
        importFunc(pair.Key, Encoding.UTF8.GetString(Convert.FromBase64String(pair.Value)));
    }
}).Dump();

Export requires the Humanizer nuget package.Both use Newtonsoft.Json, obviously.

Moving passwords.

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