CredentialUIAuto.cs

using System.Windows.Automation;

// WINDOWS CREDENTIAL UI AUTOMATION by 3735943886

/*
Credential Dialog Xaml Host
 - TextBlock / WindowLogo / 
 - TextBlock /  / Windows 보안
 - Button / CloseButton / 닫기
 - ScrollViewer /  /
 - TextBlock /  / 사용자 자격 증명 입력
 - TextBlock /  / 이 자격 증명은 192.168.20.213에 연결할 때 사용됩니다.
 - TextBox / EditField_1 / 사용자 이름
 - PasswordBox / PasswordField_2 / 암호
 - Button / OkButton / 확인
 - Button / CancelButton / 취소

Credential Dialog Xaml Host
 - TextBlock / WindowLogo / 
 - TextBlock /  / Windows 보안
 - Button / CloseButton / 닫기
 - ScrollViewer /  /
 - TextBlock /  / 자격 증명이 작동하지 않습니다.
 - TextBlock /  / Windows Defender Credential Guard는 저장된 자격 증명 사용을 허용하지 않습니다. 자격 증명을 입력하세요.
 - TextBlock / StaticTextField_0 / sysadmin
 - PasswordBox / PasswordField_2 / 암호
 - TextBlock / ErrorText / 로그온하지 못했습니다.
 - Hyperlink / ChooseAnotherOption / 다른 옵션 선택
 - TextBlock /  / 다른 옵션 선택
 - Button / OkButton / 확인
 - Button / CancelButton / 취소
*/

namespace UI
{
    public class CredentialAutoInput
    {
        AutomationElement AEid = null;
        AutomationElement AEpass = null;
        AutomationElement AEbtn = null;

        public bool GetXamlCredInfo(string TargetString = null)
        {
            const string CredentialUIBrokerClass = "Credential"; // Credential Dialog Xaml Host
            const string StaticIdFieldId = "StaticTextField"; // StaticTextField_0
            const string IdFieldId = "EditField"; // EditField_1
            const string PassFieldId = "PasswordField"; // PasswordField_2
            const string BtnFieldId = "OkButton"; // OkButton

            // If addr is null, do not check the target dest
            bool bUiTarget = (TargetString == null);

            // Iterate all XAML window
            AutomationElementCollection AECtargets = AutomationElement.RootElement.FindAll(TreeScope.Children, PropertyCondition.TrueCondition);
            foreach (AutomationElement uitarget in AECtargets)
            {
                // Check if ClassName contains Credential
                if (uitarget.Current.ClassName.Contains(CredentialUIBrokerClass))
                {
                    AutomationElementCollection AECfields = uitarget.FindAll(TreeScope.Descendants, PropertyCondition.TrueCondition);
                    AEid = null; AEpass = null; AEbtn = null;

                    // Iterate all fields
                    foreach (AutomationElement field in AECfields)
                    {
                        if (field.Current.ControlType == ControlType.Text && bUiTarget == false)
                        {
                            if (field.Current.Name.Contains(TargetString)) bUiTarget = true;
                        }
                        else
                        {
                            if (field.Current.AutomationId.Contains(IdFieldId)) AEid = field;
                            else if (field.Current.AutomationId.Contains(StaticIdFieldId)) AEid = field;
                            else if (field.Current.AutomationId.Contains(PassFieldId)) AEpass = field;
                            else if (field.Current.AutomationId.Contains(BtnFieldId)) AEbtn = field;
                        }
                    }

                    // Target found
                    if (AEid != null && AEpass != null && AEbtn != null) return bUiTarget;
                }
            }

            // Target not found
            AEid = null; AEpass = null; AEbtn = null; return false;
        }

        public string GetId()
        {
            if (AEid == null) if (GetXamlCredInfo() == false) return null;
            return AEid.Current.Name;
        }

        public bool Connect(string id, string pass, string addr = null)
        {
            const string IdFieldClass = "TextBox"; // TextBox

            // Get Xaml Info
            if (AEid == null) if (GetXamlCredInfo(addr) == false) return false;

            // If Id is editbox, fill it
            if (AEid.Current.ClassName.Contains(IdFieldClass)) (AEid.GetCurrentPattern(ValuePattern.Pattern) as ValuePattern).SetValue(id);
            else if (AEid.Current.Name != id) return false;

            // Fill password
            (AEpass.GetCurrentPattern(ValuePattern.Pattern) as ValuePattern).SetValue(pass);

            // Press OK button
            (AEbtn.GetCurrentPattern(InvokePattern.Pattern) as InvokePattern).Invoke();

            return true;
        }
    }
}