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JunielKatarn/ActivateProject64.cs

Created February 28, 2022 04:37
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Revisions

  1. JunielKatarn created this gist Feb 28, 2022.
    61 changes: 61 additions & 0 deletions ActivateProject64.cs
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,61 @@
    using ICSharpCode.SharpZipLib.Zip.Compression.Streams;
    using Microsoft.Win32;
    using System.Security.Cryptography;
    using System.Text;

    class Program
    {
    static void Main()
    {
    var regBytes = (byte[])Registry.GetValue(@"HKEY_CURRENT_USER\Software\Project64", "user", null)!;

    // Back up
    Registry.SetValue(@"HKEY_CURRENT_USER\Software\Project64", "user.bak", regBytes);

    // "Decrypt"
    for (int i = 0; i < regBytes.Length; i++)
    {
    regBytes[i] ^= 0xAA;
    }

    // Expand
    byte[] plainBytes;
    using (var inpStream = new MemoryStream(regBytes))
    using (var outStream = new MemoryStream())
    using (var infStream = new InflaterInputStream(inpStream))
    {
    infStream.CopyTo(outStream);
    plainBytes = outStream.ToArray();
    }

    // As per 2022-02-07, SupportInfo::Validated offset is 1,224
    plainBytes[1224] = 1;

    // Compute Hash
    var md5 = HashAlgorithm.Create("MD5")!;
    var hash = md5.ComputeHash(plainBytes, 0, plainBytes.Length - 32)!;
    var hashString = BitConverter.ToString(hash).Replace("-", "");
    var hashStringBytes = Encoding.ASCII.GetBytes(hashString);
    hashStringBytes.CopyTo(plainBytes, plainBytes.Length - hashStringBytes.Length);

    // Compress
    using (var outStream = new MemoryStream())
    using (var defStream = new DeflaterOutputStream(outStream))
    {
    defStream.Write(plainBytes, 0, plainBytes.Length);
    defStream.Flush();
    defStream.Dispose(); // Else, risk getting an incomplete stream below.

    regBytes = outStream.ToArray();
    }

    // "Encrypt"
    for (int i = 0; i < regBytes.Length; i++)
    {
    regBytes[i] ^= 0xAA;
    }

    // Update registry
    Registry.SetValue(@"HKEY_CURRENT_USER\Software\Project64", "user", regBytes);
    }
    }