datagrip-decrypt-password.linq

<Query Kind="Program">
  <NuGetReference>YamlDotNet</NuGetReference>
  <Namespace>YamlDotNet.Serialization</Namespace>
  <Namespace>YamlDotNet.Core</Namespace>
  <Namespace>System.Security.Cryptography</Namespace>
  <Namespace>System.Runtime.InteropServices</Namespace>
</Query>

void Main()
{
  var key = "Proxy Config Sec";
  var path = @"C:\Users\user\AppData\Roaming\JetBrains\DataGrip2023.3\c.pwd";
  var deserializer = new DeserializerBuilder()
      .WithTypeConverter(new ByteArrayConverter())
      .WithTagMapping("tag:yaml.org,2002:binary", typeof(byte[]))
  .Build();
  Dictionary<object, object> yamlObject = (Dictionary<object, object>)deserializer.Deserialize(File.ReadAllText(path))!;
  var data = (byte[])yamlObject["value"];
  data = ProtectedData.Unprotect(data, null, DataProtectionScope.CurrentUser);
  var span = new Span<byte>(data);
  MemoryExtensions.Reverse(span[..4]);
  var ivlen = MemoryMarshal.Read<int>(span[..4]);
  var iv = span[4..(4 + ivlen)];
  data = span[(4 + ivlen)..].ToArray();
  using var aesAlg = Aes.Create();
  aesAlg.Key = Encoding.ASCII.GetBytes(key);
  aesAlg.IV = iv.ToArray();
  var decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
  using var msDecrypt = new MemoryStream(data);
  using var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read);
  using var msPlain = new MemoryStream();
  csDecrypt.CopyTo(msPlain);
  var decryptedBytes = msPlain.ToArray();
  Console.WriteLine(Encoding.UTF8.GetString(decryptedBytes));
}

public class ByteArrayConverter : IYamlTypeConverter
{
	public bool Accepts(Type type)
	{
		return type == typeof(byte[]);
	}

	public object ReadYaml(YamlDotNet.Core.IParser parser, Type type)
	{
		var scalar = (YamlDotNet.Core.Events.Scalar)parser.Current;
		var bytes = Convert.FromBase64String(scalar.Value);
		parser.MoveNext();
		return bytes;
	}

	public void WriteYaml(YamlDotNet.Core.IEmitter emitter, object value, Type type)
	{
		var bytes = (byte[])value;
		emitter.Emit(new YamlDotNet.Core.Events.Scalar(
			null,
			"tag:yaml.org,2002:binary",
			Convert.ToBase64String(bytes),
			ScalarStyle.Plain,
			false,
			false
		));
	}
}