711 lines
32 KiB
C#
711 lines
32 KiB
C#
using Microsoft.Win32.SafeHandles;
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Runtime.InteropServices;
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using System.Security.AccessControl;
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using System.Security.Principal;
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using System.Text;
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using Ansible.AccessToken;
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using Ansible.Process;
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namespace Ansible.Become
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{
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internal class NativeHelpers
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{
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[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
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public struct KERB_S4U_LOGON
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{
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public UInt32 MessageType;
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public UInt32 Flags;
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public LSA_UNICODE_STRING ClientUpn;
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public LSA_UNICODE_STRING ClientRealm;
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}
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[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
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public struct LSA_STRING
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{
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public UInt16 Length;
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public UInt16 MaximumLength;
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[MarshalAs(UnmanagedType.LPStr)] public string Buffer;
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public static implicit operator string(LSA_STRING s)
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{
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return s.Buffer;
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}
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public static implicit operator LSA_STRING(string s)
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{
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if (s == null)
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s = "";
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LSA_STRING lsaStr = new LSA_STRING
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{
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Buffer = s,
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Length = (UInt16)s.Length,
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MaximumLength = (UInt16)(s.Length + 1),
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};
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return lsaStr;
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}
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}
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[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
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public struct LSA_UNICODE_STRING
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{
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public UInt16 Length;
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public UInt16 MaximumLength;
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public IntPtr Buffer;
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}
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[StructLayout(LayoutKind.Sequential)]
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public struct SECURITY_LOGON_SESSION_DATA
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{
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public UInt32 Size;
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public Luid LogonId;
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public LSA_UNICODE_STRING UserName;
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public LSA_UNICODE_STRING LogonDomain;
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public LSA_UNICODE_STRING AuthenticationPackage;
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public SECURITY_LOGON_TYPE LogonType;
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}
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[StructLayout(LayoutKind.Sequential)]
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public struct TOKEN_SOURCE
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{
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)] public char[] SourceName;
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public Luid SourceIdentifier;
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}
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public enum SECURITY_LOGON_TYPE
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{
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System = 0, // Used only by the System account
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Interactive = 2,
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Network,
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Batch,
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Service,
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Proxy,
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Unlock,
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NetworkCleartext,
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NewCredentials,
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RemoteInteractive,
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CachedInteractive,
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CachedRemoteInteractive,
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CachedUnlock
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}
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[Flags]
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public enum ProcessChildProcessPolicyFlags
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{
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None = 0x0,
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NoChildProcessCreation = 0x1,
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AuditNoChildProcessCreation = 0x2,
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AllowSecureProcessCreation = 0x4,
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}
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}
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internal class NativeMethods
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{
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public const int ProcessChildProcessPolicy = 13;
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[DllImport("advapi32.dll", SetLastError = true)]
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public static extern bool AllocateLocallyUniqueId(
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out Luid Luid);
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[DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
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public static extern bool CreateProcessWithTokenW(
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SafeNativeHandle hToken,
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LogonFlags dwLogonFlags,
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[MarshalAs(UnmanagedType.LPWStr)] string lpApplicationName,
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StringBuilder lpCommandLine,
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Process.NativeHelpers.ProcessCreationFlags dwCreationFlags,
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Process.SafeMemoryBuffer lpEnvironment,
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[MarshalAs(UnmanagedType.LPWStr)] string lpCurrentDirectory,
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Process.NativeHelpers.STARTUPINFOEX lpStartupInfo,
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out Process.NativeHelpers.PROCESS_INFORMATION lpProcessInformation);
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[DllImport("kernel32.dll")]
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public static extern UInt32 GetCurrentThreadId();
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[DllImport("kernel32.dll", SetLastError = true)]
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public static extern bool GetProcessMitigationPolicy(
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SafeNativeHandle hProcess,
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int MitigationPolicy,
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ref NativeHelpers.ProcessChildProcessPolicyFlags lpBuffer,
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IntPtr dwLength);
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[DllImport("user32.dll", SetLastError = true)]
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public static extern NoopSafeHandle GetProcessWindowStation();
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[DllImport("user32.dll", SetLastError = true)]
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public static extern NoopSafeHandle GetThreadDesktop(
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UInt32 dwThreadId);
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[DllImport("secur32.dll", SetLastError = true)]
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public static extern UInt32 LsaDeregisterLogonProcess(
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IntPtr LsaHandle);
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[DllImport("secur32.dll", SetLastError = true)]
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public static extern UInt32 LsaFreeReturnBuffer(
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IntPtr Buffer);
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[DllImport("secur32.dll", SetLastError = true)]
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public static extern UInt32 LsaGetLogonSessionData(
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ref Luid LogonId,
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out SafeLsaMemoryBuffer ppLogonSessionData);
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[DllImport("secur32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
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public static extern UInt32 LsaLogonUser(
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SafeLsaHandle LsaHandle,
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NativeHelpers.LSA_STRING OriginName,
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LogonType LogonType,
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UInt32 AuthenticationPackage,
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IntPtr AuthenticationInformation,
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UInt32 AuthenticationInformationLength,
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IntPtr LocalGroups,
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NativeHelpers.TOKEN_SOURCE SourceContext,
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out SafeLsaMemoryBuffer ProfileBuffer,
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out UInt32 ProfileBufferLength,
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out Luid LogonId,
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out SafeNativeHandle Token,
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out IntPtr Quotas,
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out UInt32 SubStatus);
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[DllImport("secur32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
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public static extern UInt32 LsaLookupAuthenticationPackage(
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SafeLsaHandle LsaHandle,
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NativeHelpers.LSA_STRING PackageName,
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out UInt32 AuthenticationPackage);
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[DllImport("advapi32.dll")]
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public static extern UInt32 LsaNtStatusToWinError(
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UInt32 Status);
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[DllImport("secur32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
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public static extern UInt32 LsaRegisterLogonProcess(
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NativeHelpers.LSA_STRING LogonProcessName,
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out SafeLsaHandle LsaHandle,
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out IntPtr SecurityMode);
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}
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internal class SafeLsaHandle : SafeHandleZeroOrMinusOneIsInvalid
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{
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public SafeLsaHandle() : base(true) { }
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protected override bool ReleaseHandle()
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{
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UInt32 res = NativeMethods.LsaDeregisterLogonProcess(handle);
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return res == 0;
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}
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}
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internal class SafeLsaMemoryBuffer : SafeHandleZeroOrMinusOneIsInvalid
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{
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public SafeLsaMemoryBuffer() : base(true) { }
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protected override bool ReleaseHandle()
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{
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UInt32 res = NativeMethods.LsaFreeReturnBuffer(handle);
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return res == 0;
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}
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}
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internal class NoopSafeHandle : SafeHandle
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{
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public NoopSafeHandle() : base(IntPtr.Zero, false) { }
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public override bool IsInvalid { get { return false; } }
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protected override bool ReleaseHandle() { return true; }
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}
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[Flags]
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public enum LogonFlags
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{
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None = 0x00000000,
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WithProfile = 0x00000001,
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NetcredentialsOnly = 0x00000002
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}
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public class BecomeUtil
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{
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private static List<string> SERVICE_SIDS = new List<string>()
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{
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"S-1-5-18", // NT AUTHORITY\SYSTEM
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"S-1-5-19", // NT AUTHORITY\LocalService
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"S-1-5-20" // NT AUTHORITY\NetworkService
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};
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private static int WINDOWS_STATION_ALL_ACCESS = 0x000F037F;
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private static int DESKTOP_RIGHTS_ALL_ACCESS = 0x000F01FF;
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private static bool _getProcessMitigationPolicySupported = true;
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public static Result CreateProcessAsUser(string username, string password, string command)
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{
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return CreateProcessAsUser(username, password, LogonFlags.WithProfile, LogonType.Interactive,
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null, command, null, null, "");
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}
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public static Result CreateProcessAsUser(string username, string password, LogonFlags logonFlags, LogonType logonType,
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string lpApplicationName, string lpCommandLine, string lpCurrentDirectory, IDictionary environment,
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string stdin)
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{
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byte[] stdinBytes;
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if (String.IsNullOrEmpty(stdin))
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stdinBytes = new byte[0];
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else
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{
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if (!stdin.EndsWith(Environment.NewLine))
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stdin += Environment.NewLine;
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stdinBytes = new UTF8Encoding(false).GetBytes(stdin);
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}
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return CreateProcessAsUser(username, password, logonFlags, logonType, lpApplicationName, lpCommandLine,
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lpCurrentDirectory, environment, stdinBytes);
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}
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/// <summary>
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/// Creates a process as another user account. This method will attempt to run as another user with the
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/// highest possible permissions available. The main privilege required is the SeDebugPrivilege, without
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/// this privilege you can only run as a local or domain user if the username and password is specified.
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/// </summary>
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/// <param name="username">The username of the runas user</param>
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/// <param name="password">The password of the runas user</param>
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/// <param name="logonFlags">LogonFlags to control how to logon a user when the password is specified</param>
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/// <param name="logonType">Controls what type of logon is used, this only applies when the password is specified</param>
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/// <param name="lpApplicationName">The name of the executable or batch file to executable</param>
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/// <param name="lpCommandLine">The command line to execute, typically this includes lpApplication as the first argument</param>
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/// <param name="lpCurrentDirectory">The full path to the current directory for the process, null will have the same cwd as the calling process</param>
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/// <param name="environment">A dictionary of key/value pairs to define the new process environment</param>
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/// <param name="stdin">Bytes sent to the stdin pipe</param>
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/// <returns>Ansible.Process.Result object that contains the command output and return code</returns>
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public static Result CreateProcessAsUser(string username, string password, LogonFlags logonFlags, LogonType logonType,
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string lpApplicationName, string lpCommandLine, string lpCurrentDirectory, IDictionary environment, byte[] stdin)
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{
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// While we use STARTUPINFOEX having EXTENDED_STARTUPINFO_PRESENT causes a parameter validation error
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Process.NativeHelpers.ProcessCreationFlags creationFlags = Process.NativeHelpers.ProcessCreationFlags.CREATE_UNICODE_ENVIRONMENT;
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Process.NativeHelpers.PROCESS_INFORMATION pi = new Process.NativeHelpers.PROCESS_INFORMATION();
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Process.NativeHelpers.STARTUPINFOEX si = new Process.NativeHelpers.STARTUPINFOEX();
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si.startupInfo.dwFlags = Process.NativeHelpers.StartupInfoFlags.USESTDHANDLES;
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SafeFileHandle stdoutRead, stdoutWrite, stderrRead, stderrWrite, stdinRead, stdinWrite;
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ProcessUtil.CreateStdioPipes(si, out stdoutRead, out stdoutWrite, out stderrRead, out stderrWrite,
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out stdinRead, out stdinWrite);
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FileStream stdinStream = new FileStream(stdinWrite, FileAccess.Write);
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// $null from PowerShell ends up as an empty string, we need to convert back as an empty string doesn't
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// make sense for these parameters
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if (lpApplicationName == "")
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lpApplicationName = null;
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if (lpCurrentDirectory == "")
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lpCurrentDirectory = null;
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// A user may have 2 tokens, 1 limited and 1 elevated. GetUserTokens will return both token to ensure
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// we don't close one of the pairs while the process is still running. If the process tries to retrieve
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// one of the pairs and the token handle is closed then it will fail with ERROR_NO_SUCH_LOGON_SESSION.
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List<SafeNativeHandle> userTokens = GetUserTokens(username, password, logonType);
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try
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{
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using (Process.SafeMemoryBuffer lpEnvironment = ProcessUtil.CreateEnvironmentPointer(environment))
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{
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bool launchSuccess = false;
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StringBuilder commandLine = new StringBuilder(lpCommandLine);
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foreach (SafeNativeHandle token in userTokens)
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{
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// GetUserTokens could return null if an elevated token could not be retrieved.
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if (token == null)
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continue;
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if (NativeMethods.CreateProcessWithTokenW(token, logonFlags, lpApplicationName,
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commandLine, creationFlags, lpEnvironment, lpCurrentDirectory, si, out pi))
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{
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launchSuccess = true;
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break;
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}
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}
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if (!launchSuccess)
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throw new Process.Win32Exception("CreateProcessWithTokenW() failed");
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}
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return ProcessUtil.WaitProcess(stdoutRead, stdoutWrite, stderrRead, stderrWrite, stdinStream, stdin,
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pi.hProcess);
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}
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finally
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{
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userTokens.Where(t => t != null).ToList().ForEach(t => t.Dispose());
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}
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}
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private static List<SafeNativeHandle> GetUserTokens(string username, string password, LogonType logonType)
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{
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List<SafeNativeHandle> userTokens = new List<SafeNativeHandle>();
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SafeNativeHandle systemToken = null;
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bool impersonated = false;
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string becomeSid = username;
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if (logonType != LogonType.NewCredentials)
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{
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// If prefixed with .\, we are becoming a local account, strip the prefix
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if (username.StartsWith(".\\"))
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username = username.Substring(2);
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NTAccount account = new NTAccount(username);
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becomeSid = ((SecurityIdentifier)account.Translate(typeof(SecurityIdentifier))).Value;
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// Grant access to the current Windows Station and Desktop to the become user
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GrantAccessToWindowStationAndDesktop(account);
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// Try and impersonate a SYSTEM token, we need a SYSTEM token to either become a well known service
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// account or have administrative rights on the become access token.
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// If we ultimately are becoming the SYSTEM account we want the token with the most privileges available.
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// https://github.com/ansible/ansible/issues/71453
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bool usedForProcess = becomeSid == "S-1-5-18";
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systemToken = GetPrimaryTokenForUser(new SecurityIdentifier("S-1-5-18"),
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new List<string>() { "SeTcbPrivilege" }, usedForProcess);
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if (systemToken != null)
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{
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try
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{
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TokenUtil.ImpersonateToken(systemToken);
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impersonated = true;
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}
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catch (Process.Win32Exception) { } // We tried, just rely on current user's permissions.
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}
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}
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// We require impersonation if becoming a service sid or becoming a user without a password
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if (!impersonated && (SERVICE_SIDS.Contains(becomeSid) || String.IsNullOrEmpty(password)))
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throw new Exception("Failed to get token for NT AUTHORITY\\SYSTEM required for become as a service account or an account without a password");
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try
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{
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if (becomeSid == "S-1-5-18")
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userTokens.Add(systemToken);
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// Cannot use String.IsEmptyOrNull() as an empty string is an account that doesn't have a pass.
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// We only use S4U if no password was defined or it was null
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else if (!SERVICE_SIDS.Contains(becomeSid) && password == null && logonType != LogonType.NewCredentials)
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{
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// If no password was specified, try and duplicate an existing token for that user or use S4U to
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// generate one without network credentials
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SecurityIdentifier sid = new SecurityIdentifier(becomeSid);
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SafeNativeHandle becomeToken = GetPrimaryTokenForUser(sid);
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if (becomeToken != null)
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{
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userTokens.Add(GetElevatedToken(becomeToken));
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userTokens.Add(becomeToken);
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}
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else
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{
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becomeToken = GetS4UTokenForUser(sid, logonType);
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userTokens.Add(null);
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userTokens.Add(becomeToken);
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}
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}
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else
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{
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string domain = null;
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switch (becomeSid)
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{
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case "S-1-5-19":
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logonType = LogonType.Service;
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domain = "NT AUTHORITY";
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username = "LocalService";
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break;
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case "S-1-5-20":
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logonType = LogonType.Service;
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domain = "NT AUTHORITY";
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username = "NetworkService";
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break;
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default:
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// Trying to become a local or domain account
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if (username.Contains(@"\"))
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{
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string[] userSplit = username.Split(new char[1] { '\\' }, 2);
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domain = userSplit[0];
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username = userSplit[1];
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}
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else if (!username.Contains("@"))
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domain = ".";
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break;
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}
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SafeNativeHandle hToken = TokenUtil.LogonUser(username, domain, password, logonType,
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LogonProvider.Default);
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// Get the elevated token for a local/domain accounts only
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if (!SERVICE_SIDS.Contains(becomeSid))
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userTokens.Add(GetElevatedToken(hToken));
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userTokens.Add(hToken);
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}
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}
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finally
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{
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if (impersonated)
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TokenUtil.RevertToSelf();
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}
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return userTokens;
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}
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private static SafeNativeHandle GetPrimaryTokenForUser(
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SecurityIdentifier sid,
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List<string> requiredPrivileges = null,
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bool usedForProcess = false)
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{
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// According to CreateProcessWithTokenW we require a token with
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// TOKEN_QUERY, TOKEN_DUPLICATE and TOKEN_ASSIGN_PRIMARY
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// Also add in TOKEN_IMPERSONATE so we can get an impersonated token
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TokenAccessLevels dwAccess = TokenAccessLevels.Query |
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TokenAccessLevels.Duplicate |
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TokenAccessLevels.AssignPrimary |
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TokenAccessLevels.Impersonate;
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SafeNativeHandle userToken = null;
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int privilegeCount = 0;
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// If we are using this token for the process, we need to check the
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// process mitigation policy allows child processes to be created.
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var processFilter = usedForProcess
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? (Func<System.Diagnostics.Process, SafeNativeHandle, bool>)((p, t) =>
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{
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return GetProcessChildProcessPolicyFlags(t) == NativeHelpers.ProcessChildProcessPolicyFlags.None;
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})
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: ((p, t) => true);
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foreach (SafeNativeHandle hToken in TokenUtil.EnumerateUserTokens(sid, dwAccess, processFilter))
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{
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// Filter out any Network logon tokens, using become with that is useless when S4U
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// can give us a Batch logon
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NativeHelpers.SECURITY_LOGON_TYPE tokenLogonType = GetTokenLogonType(hToken);
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if (tokenLogonType == NativeHelpers.SECURITY_LOGON_TYPE.Network)
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continue;
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List<string> actualPrivileges = TokenUtil.GetTokenPrivileges(hToken).Select(x => x.Name).ToList();
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// If the token has less or the same number of privileges than the current token, skip it.
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if (usedForProcess && privilegeCount >= actualPrivileges.Count)
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continue;
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// Check that the required privileges are on the token
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if (requiredPrivileges != null)
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{
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int missing = requiredPrivileges.Where(x => !actualPrivileges.Contains(x)).Count();
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if (missing > 0)
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continue;
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}
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// Duplicate the token to convert it to a primary token with the access level required.
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try
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{
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userToken = TokenUtil.DuplicateToken(hToken, TokenAccessLevels.MaximumAllowed,
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SecurityImpersonationLevel.Anonymous, TokenType.Primary);
|
|
privilegeCount = actualPrivileges.Count;
|
|
}
|
|
catch (Process.Win32Exception)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
// If we don't care about getting the token with the most privileges, escape the loop as we already
|
|
// have a token.
|
|
if (!usedForProcess)
|
|
break;
|
|
}
|
|
|
|
return userToken;
|
|
}
|
|
|
|
private static SafeNativeHandle GetS4UTokenForUser(SecurityIdentifier sid, LogonType logonType)
|
|
{
|
|
NTAccount becomeAccount = (NTAccount)sid.Translate(typeof(NTAccount));
|
|
string[] userSplit = becomeAccount.Value.Split(new char[1] { '\\' }, 2);
|
|
string domainName = userSplit[0];
|
|
string username = userSplit[1];
|
|
bool domainUser = domainName.ToLowerInvariant() != Environment.MachineName.ToLowerInvariant();
|
|
|
|
NativeHelpers.LSA_STRING logonProcessName = "ansible";
|
|
SafeLsaHandle lsaHandle;
|
|
IntPtr securityMode;
|
|
UInt32 res = NativeMethods.LsaRegisterLogonProcess(logonProcessName, out lsaHandle, out securityMode);
|
|
if (res != 0)
|
|
throw new Process.Win32Exception((int)NativeMethods.LsaNtStatusToWinError(res), "LsaRegisterLogonProcess() failed");
|
|
|
|
using (lsaHandle)
|
|
{
|
|
NativeHelpers.LSA_STRING packageName = domainUser ? "Kerberos" : "MICROSOFT_AUTHENTICATION_PACKAGE_V1_0";
|
|
UInt32 authPackage;
|
|
res = NativeMethods.LsaLookupAuthenticationPackage(lsaHandle, packageName, out authPackage);
|
|
if (res != 0)
|
|
throw new Process.Win32Exception((int)NativeMethods.LsaNtStatusToWinError(res),
|
|
String.Format("LsaLookupAuthenticationPackage({0}) failed", (string)packageName));
|
|
|
|
int usernameLength = username.Length * sizeof(char);
|
|
int domainLength = domainName.Length * sizeof(char);
|
|
int authInfoLength = (Marshal.SizeOf(typeof(NativeHelpers.KERB_S4U_LOGON)) + usernameLength + domainLength);
|
|
IntPtr authInfo = Marshal.AllocHGlobal((int)authInfoLength);
|
|
try
|
|
{
|
|
IntPtr usernamePtr = IntPtr.Add(authInfo, Marshal.SizeOf(typeof(NativeHelpers.KERB_S4U_LOGON)));
|
|
IntPtr domainPtr = IntPtr.Add(usernamePtr, usernameLength);
|
|
|
|
// KERB_S4U_LOGON has the same structure as MSV1_0_S4U_LOGON (local accounts)
|
|
NativeHelpers.KERB_S4U_LOGON s4uLogon = new NativeHelpers.KERB_S4U_LOGON
|
|
{
|
|
MessageType = 12, // KerbS4ULogon
|
|
Flags = 0,
|
|
ClientUpn = new NativeHelpers.LSA_UNICODE_STRING
|
|
{
|
|
Length = (UInt16)usernameLength,
|
|
MaximumLength = (UInt16)usernameLength,
|
|
Buffer = usernamePtr,
|
|
},
|
|
ClientRealm = new NativeHelpers.LSA_UNICODE_STRING
|
|
{
|
|
Length = (UInt16)domainLength,
|
|
MaximumLength = (UInt16)domainLength,
|
|
Buffer = domainPtr,
|
|
},
|
|
};
|
|
Marshal.StructureToPtr(s4uLogon, authInfo, false);
|
|
Marshal.Copy(username.ToCharArray(), 0, usernamePtr, username.Length);
|
|
Marshal.Copy(domainName.ToCharArray(), 0, domainPtr, domainName.Length);
|
|
|
|
Luid sourceLuid;
|
|
if (!NativeMethods.AllocateLocallyUniqueId(out sourceLuid))
|
|
throw new Process.Win32Exception("AllocateLocallyUniqueId() failed");
|
|
|
|
NativeHelpers.TOKEN_SOURCE tokenSource = new NativeHelpers.TOKEN_SOURCE
|
|
{
|
|
SourceName = "ansible\0".ToCharArray(),
|
|
SourceIdentifier = sourceLuid,
|
|
};
|
|
|
|
// Only Batch or Network will work with S4U, prefer Batch but use Network if asked
|
|
LogonType lsaLogonType = logonType == LogonType.Network
|
|
? LogonType.Network
|
|
: LogonType.Batch;
|
|
SafeLsaMemoryBuffer profileBuffer;
|
|
UInt32 profileBufferLength;
|
|
Luid logonId;
|
|
SafeNativeHandle hToken;
|
|
IntPtr quotas;
|
|
UInt32 subStatus;
|
|
|
|
res = NativeMethods.LsaLogonUser(lsaHandle, logonProcessName, lsaLogonType, authPackage,
|
|
authInfo, (UInt32)authInfoLength, IntPtr.Zero, tokenSource, out profileBuffer, out profileBufferLength,
|
|
out logonId, out hToken, out quotas, out subStatus);
|
|
if (res != 0)
|
|
throw new Process.Win32Exception((int)NativeMethods.LsaNtStatusToWinError(res),
|
|
String.Format("LsaLogonUser() failed with substatus {0}", subStatus));
|
|
|
|
profileBuffer.Dispose();
|
|
return hToken;
|
|
}
|
|
finally
|
|
{
|
|
Marshal.FreeHGlobal(authInfo);
|
|
}
|
|
}
|
|
}
|
|
|
|
private static SafeNativeHandle GetElevatedToken(SafeNativeHandle hToken)
|
|
{
|
|
TokenElevationType tet = TokenUtil.GetTokenElevationType(hToken);
|
|
// We already have the best token we can get, no linked token is really available.
|
|
if (tet != TokenElevationType.Limited)
|
|
return null;
|
|
|
|
SafeNativeHandle linkedToken = TokenUtil.GetTokenLinkedToken(hToken);
|
|
TokenStatistics tokenStats = TokenUtil.GetTokenStatistics(linkedToken);
|
|
|
|
// We can only use a token if it's a primary one (we had the SeTcbPrivilege set)
|
|
if (tokenStats.TokenType == TokenType.Primary)
|
|
return linkedToken;
|
|
else
|
|
return null;
|
|
}
|
|
|
|
private static NativeHelpers.ProcessChildProcessPolicyFlags GetProcessChildProcessPolicyFlags(SafeNativeHandle processHandle)
|
|
{
|
|
// Because this is only used to check the policy, we ignore any
|
|
// errors and pretend that the policy is None.
|
|
NativeHelpers.ProcessChildProcessPolicyFlags policy = NativeHelpers.ProcessChildProcessPolicyFlags.None;
|
|
|
|
if (_getProcessMitigationPolicySupported)
|
|
{
|
|
try
|
|
{
|
|
if (NativeMethods.GetProcessMitigationPolicy(
|
|
processHandle,
|
|
NativeMethods.ProcessChildProcessPolicy,
|
|
ref policy,
|
|
(IntPtr)4))
|
|
{
|
|
return policy;
|
|
}
|
|
}
|
|
catch (EntryPointNotFoundException)
|
|
{
|
|
// If the function is not available, we won't try to call it again
|
|
_getProcessMitigationPolicySupported = false;
|
|
}
|
|
}
|
|
|
|
return policy;
|
|
}
|
|
|
|
private static NativeHelpers.SECURITY_LOGON_TYPE GetTokenLogonType(SafeNativeHandle hToken)
|
|
{
|
|
TokenStatistics stats = TokenUtil.GetTokenStatistics(hToken);
|
|
|
|
SafeLsaMemoryBuffer sessionDataPtr;
|
|
UInt32 res = NativeMethods.LsaGetLogonSessionData(ref stats.AuthenticationId, out sessionDataPtr);
|
|
if (res != 0)
|
|
// Default to Network, if we weren't able to get the actual type treat it as an error and assume
|
|
// we don't want to run a process with the token
|
|
return NativeHelpers.SECURITY_LOGON_TYPE.Network;
|
|
|
|
using (sessionDataPtr)
|
|
{
|
|
NativeHelpers.SECURITY_LOGON_SESSION_DATA sessionData = (NativeHelpers.SECURITY_LOGON_SESSION_DATA)Marshal.PtrToStructure(
|
|
sessionDataPtr.DangerousGetHandle(), typeof(NativeHelpers.SECURITY_LOGON_SESSION_DATA));
|
|
return sessionData.LogonType;
|
|
}
|
|
}
|
|
|
|
private static void GrantAccessToWindowStationAndDesktop(IdentityReference account)
|
|
{
|
|
GrantAccess(account, NativeMethods.GetProcessWindowStation(), WINDOWS_STATION_ALL_ACCESS);
|
|
GrantAccess(account, NativeMethods.GetThreadDesktop(NativeMethods.GetCurrentThreadId()), DESKTOP_RIGHTS_ALL_ACCESS);
|
|
}
|
|
|
|
private static void GrantAccess(IdentityReference account, NoopSafeHandle handle, int accessMask)
|
|
{
|
|
GenericSecurity security = new GenericSecurity(false, ResourceType.WindowObject, handle, AccessControlSections.Access);
|
|
security.AddAccessRule(new GenericAccessRule(account, accessMask, AccessControlType.Allow));
|
|
security.Persist(handle, AccessControlSections.Access);
|
|
}
|
|
|
|
private class GenericSecurity : NativeObjectSecurity
|
|
{
|
|
public GenericSecurity(bool isContainer, ResourceType resType, SafeHandle objectHandle, AccessControlSections sectionsRequested)
|
|
: base(isContainer, resType, objectHandle, sectionsRequested) { }
|
|
public new void Persist(SafeHandle handle, AccessControlSections includeSections) { base.Persist(handle, includeSections); }
|
|
public new void AddAccessRule(AccessRule rule) { base.AddAccessRule(rule); }
|
|
public override Type AccessRightType { get { throw new NotImplementedException(); } }
|
|
public override AccessRule AccessRuleFactory(System.Security.Principal.IdentityReference identityReference, int accessMask, bool isInherited,
|
|
InheritanceFlags inheritanceFlags, PropagationFlags propagationFlags, AccessControlType type)
|
|
{ throw new NotImplementedException(); }
|
|
public override Type AccessRuleType { get { return typeof(AccessRule); } }
|
|
public override AuditRule AuditRuleFactory(System.Security.Principal.IdentityReference identityReference, int accessMask, bool isInherited,
|
|
InheritanceFlags inheritanceFlags, PropagationFlags propagationFlags, AuditFlags flags)
|
|
{ throw new NotImplementedException(); }
|
|
public override Type AuditRuleType { get { return typeof(AuditRule); } }
|
|
}
|
|
|
|
private class GenericAccessRule : AccessRule
|
|
{
|
|
public GenericAccessRule(IdentityReference identity, int accessMask, AccessControlType type) :
|
|
base(identity, accessMask, false, InheritanceFlags.None, PropagationFlags.None, type)
|
|
{ }
|
|
}
|
|
}
|
|
} |