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Windows Privileges - moved util code to it's own C# util (#48897)
* Windows Privileges - moved util code to it's own C# util * Rename Enabler class to PrivilegeEnabler to remove ambiguity * rename Utils to PrivilegeUtil * fix missing util name changes
This commit is contained in:
Jordan Borean
GitHub
parent
695feea541
commit
4019d4f6d1
9 changed files with 811 additions and 488 deletions
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@ -1,5 +1,5 @@
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# Copyright (c) 2017 Ansible Project
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# Simplified BSD License (see licenses/simplified_bsd.txt or https://opensource.org/licenses/BSD-2-Clause)
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# Copyright (c) 2017 Ansible Project
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# Simplified BSD License (see licenses/simplified_bsd.txt or https://opensource.org/licenses/BSD-2-Clause)
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#Requires -Module Ansible.ModuleUtils.PrivilegeUtil
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@ -408,7 +408,6 @@ namespace Ansible
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Add-Type -TypeDefinition $link_util
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$env:TMP = $original_tmp
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Import-PrivilegeUtil
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# enable the SeBackupPrivilege if it is disabled
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$state = Get-AnsiblePrivilege -Name SeBackupPrivilege
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if ($state -eq $false) {
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@ -1,424 +1,24 @@
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# Copyright (c) 2018 Ansible Project
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# Simplified BSD License (see licenses/simplified_bsd.txt or https://opensource.org/licenses/BSD-2-Clause)
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# store in separate variables to make it easier for other module_utils to
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# share this code in their own c# code
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$ansible_privilege_util_namespaces = @(
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"Microsoft.Win32.SafeHandles",
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"System",
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"System.Collections.Generic",
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"System.Linq",
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"System.Runtime.InteropServices",
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"System.Security.Principal",
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"System.Text"
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)
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$ansible_privilege_util_code = @'
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namespace Ansible.PrivilegeUtil
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{
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[Flags]
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public enum PrivilegeAttributes : uint
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{
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Disabled = 0x00000000,
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EnabledByDefault = 0x00000001,
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Enabled = 0x00000002,
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Removed = 0x00000004,
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UsedForAccess = 0x80000000,
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}
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internal class NativeHelpers
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{
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[StructLayout(LayoutKind.Sequential)]
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internal struct LUID
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{
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public UInt32 LowPart;
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public Int32 HighPart;
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}
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[StructLayout(LayoutKind.Sequential)]
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internal struct LUID_AND_ATTRIBUTES
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{
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public LUID Luid;
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public PrivilegeAttributes Attributes;
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}
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[StructLayout(LayoutKind.Sequential)]
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internal struct TOKEN_PRIVILEGES
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{
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public UInt32 PrivilegeCount;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 1)]
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public LUID_AND_ATTRIBUTES[] Privileges;
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}
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}
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internal class NativeMethods
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{
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[DllImport("advapi32.dll", SetLastError = true)]
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internal static extern bool AdjustTokenPrivileges(
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IntPtr TokenHandle,
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[MarshalAs(UnmanagedType.Bool)] bool DisableAllPrivileges,
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IntPtr NewState,
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UInt32 BufferLength,
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IntPtr PreviousState,
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out UInt32 ReturnLength);
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[DllImport("kernel32.dll")]
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internal static extern bool CloseHandle(
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IntPtr hObject);
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[DllImport("kernel32")]
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internal static extern SafeWaitHandle GetCurrentProcess();
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[DllImport("advapi32.dll", SetLastError = true)]
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internal static extern bool GetTokenInformation(
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IntPtr TokenHandle,
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UInt32 TokenInformationClass,
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IntPtr TokenInformation,
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UInt32 TokenInformationLength,
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out UInt32 ReturnLength);
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[DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
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internal static extern bool LookupPrivilegeName(
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string lpSystemName,
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ref NativeHelpers.LUID lpLuid,
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StringBuilder lpName,
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ref UInt32 cchName);
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[DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
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internal static extern bool LookupPrivilegeValue(
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string lpSystemName,
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string lpName,
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out NativeHelpers.LUID lpLuid);
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[DllImport("advapi32.dll", SetLastError = true)]
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internal static extern bool OpenProcessToken(
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SafeHandle ProcessHandle,
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TokenAccessLevels DesiredAccess,
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out IntPtr TokenHandle);
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}
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public class Win32Exception : System.ComponentModel.Win32Exception
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{
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private string _msg;
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public Win32Exception(string message) : this(Marshal.GetLastWin32Error(), message) { }
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public Win32Exception(int errorCode, string message) : base(errorCode)
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{
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_msg = String.Format("{0} ({1}, Win32ErrorCode {2})", message, base.Message, errorCode);
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}
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public override string Message { get { return _msg; } }
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public static explicit operator Win32Exception(string message) { return new Win32Exception(message); }
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}
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public class Privileges
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{
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private static readonly UInt32 TOKEN_PRIVILEGES = 3;
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public static bool CheckPrivilegeName(string name)
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{
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NativeHelpers.LUID luid;
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if (!NativeMethods.LookupPrivilegeValue(null, name, out luid))
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{
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int errCode = Marshal.GetLastWin32Error();
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if (errCode != 1313) // ERROR_NO_SUCH_PRIVILEGE
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throw new Win32Exception(errCode, String.Format("LookupPrivilegeValue({0}) failed", name));
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return false;
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}
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else
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{
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return true;
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}
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}
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public static Dictionary<string, bool?> DisablePrivilege(SafeHandle token, string privilege)
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{
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return SetTokenPrivileges(token, new Dictionary<string, bool?>() { { privilege, false } });
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}
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public static Dictionary<string, bool?> DisableAllPrivileges(SafeHandle token)
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{
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return AdjustTokenPrivileges(token, null);
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}
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public static Dictionary<string, bool?> EnablePrivilege(SafeHandle token, string privilege)
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{
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return SetTokenPrivileges(token, new Dictionary<string, bool?>() { { privilege, true } });
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}
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public static Dictionary<String, PrivilegeAttributes> GetAllPrivilegeInfo(SafeHandle token)
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{
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IntPtr hToken = IntPtr.Zero;
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if (!NativeMethods.OpenProcessToken(token, TokenAccessLevels.Query, out hToken))
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throw new Win32Exception("OpenProcessToken() failed");
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Dictionary<String, PrivilegeAttributes> info = new Dictionary<String, PrivilegeAttributes>();
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try
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{
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UInt32 tokenLength = 0;
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NativeMethods.GetTokenInformation(hToken, TOKEN_PRIVILEGES, IntPtr.Zero, 0, out tokenLength);
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NativeHelpers.LUID_AND_ATTRIBUTES[] privileges;
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IntPtr privilegesPtr = Marshal.AllocHGlobal((int)tokenLength);
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try
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{
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if (!NativeMethods.GetTokenInformation(hToken, TOKEN_PRIVILEGES, privilegesPtr, tokenLength, out tokenLength))
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throw new Win32Exception("GetTokenInformation() for TOKEN_PRIVILEGES failed");
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NativeHelpers.TOKEN_PRIVILEGES privilegeInfo = (NativeHelpers.TOKEN_PRIVILEGES)Marshal.PtrToStructure(privilegesPtr, typeof(NativeHelpers.TOKEN_PRIVILEGES));
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privileges = new NativeHelpers.LUID_AND_ATTRIBUTES[privilegeInfo.PrivilegeCount];
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PtrToStructureArray(privileges, IntPtr.Add(privilegesPtr, Marshal.SizeOf(privilegeInfo.PrivilegeCount)));
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}
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finally
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{
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Marshal.FreeHGlobal(privilegesPtr);
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}
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info = privileges.ToDictionary(p => GetPrivilegeName(p.Luid), p => p.Attributes);
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}
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finally
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{
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NativeMethods.CloseHandle(hToken);
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}
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return info;
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}
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public static SafeWaitHandle GetCurrentProcess()
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{
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return NativeMethods.GetCurrentProcess();
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}
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public static void RemovePrivilege(SafeHandle token, string privilege)
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{
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SetTokenPrivileges(token, new Dictionary<string, bool?>() { { privilege, null } });
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}
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public static Dictionary<string, bool?> SetTokenPrivileges(SafeHandle token, Dictionary<string, bool?> state)
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{
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NativeHelpers.LUID_AND_ATTRIBUTES[] privilegeAttr = new NativeHelpers.LUID_AND_ATTRIBUTES[state.Count];
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int i = 0;
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foreach (KeyValuePair<string, bool?> entry in state)
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{
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NativeHelpers.LUID luid;
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if (!NativeMethods.LookupPrivilegeValue(null, entry.Key, out luid))
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throw new Win32Exception(String.Format("LookupPrivilegeValue({0}) failed", entry.Key));
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PrivilegeAttributes attributes;
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switch (entry.Value)
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{
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case true:
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attributes = PrivilegeAttributes.Enabled;
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break;
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case false:
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attributes = PrivilegeAttributes.Disabled;
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break;
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default:
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attributes = PrivilegeAttributes.Removed;
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break;
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}
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privilegeAttr[i].Luid = luid;
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privilegeAttr[i].Attributes = attributes;
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i++;
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}
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return AdjustTokenPrivileges(token, privilegeAttr);
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}
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private static Dictionary<string, bool?> AdjustTokenPrivileges(SafeHandle token, NativeHelpers.LUID_AND_ATTRIBUTES[] newState)
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{
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bool disableAllPrivileges;
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IntPtr newStatePtr;
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NativeHelpers.LUID_AND_ATTRIBUTES[] oldStatePrivileges;
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UInt32 returnLength;
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if (newState == null)
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{
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disableAllPrivileges = true;
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newStatePtr = IntPtr.Zero;
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}
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else
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{
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disableAllPrivileges = false;
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// Need to manually marshal the bytes requires for newState as the constant size
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// of LUID_AND_ATTRIBUTES is set to 1 and can't be overridden at runtime, TOKEN_PRIVILEGES
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// always contains at least 1 entry so we need to calculate the extra size if there are
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// nore than 1 LUID_AND_ATTRIBUTES entry
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int tokenPrivilegesSize = Marshal.SizeOf(typeof(NativeHelpers.TOKEN_PRIVILEGES));
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int luidAttrSize = 0;
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if (newState.Length > 1)
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luidAttrSize = Marshal.SizeOf(typeof(NativeHelpers.LUID_AND_ATTRIBUTES)) * (newState.Length - 1);
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int totalSize = tokenPrivilegesSize + luidAttrSize;
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byte[] newStateBytes = new byte[totalSize];
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// get the first entry that includes the struct details
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NativeHelpers.TOKEN_PRIVILEGES tokenPrivileges = new NativeHelpers.TOKEN_PRIVILEGES()
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{
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PrivilegeCount = (UInt32)newState.Length,
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Privileges = new NativeHelpers.LUID_AND_ATTRIBUTES[1],
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};
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if (newState.Length > 0)
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tokenPrivileges.Privileges[0] = newState[0];
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int offset = StructureToBytes(tokenPrivileges, newStateBytes, 0);
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// copy the remaining LUID_AND_ATTRIBUTES (if any)
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for (int i = 1; i < newState.Length; i++)
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offset += StructureToBytes(newState[i], newStateBytes, offset);
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// finally create the pointer to the byte array we just created
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newStatePtr = Marshal.AllocHGlobal(newStateBytes.Length);
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Marshal.Copy(newStateBytes, 0, newStatePtr, newStateBytes.Length);
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}
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try
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{
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IntPtr hToken = IntPtr.Zero;
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if (!NativeMethods.OpenProcessToken(token, TokenAccessLevels.Query | TokenAccessLevels.AdjustPrivileges, out hToken))
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throw new Win32Exception("OpenProcessToken() failed with Query and AdjustPrivileges");
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try
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{
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IntPtr oldStatePtr = Marshal.AllocHGlobal(0);
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if (!NativeMethods.AdjustTokenPrivileges(hToken, disableAllPrivileges, newStatePtr, 0, oldStatePtr, out returnLength))
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{
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int errCode = Marshal.GetLastWin32Error();
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if (errCode != 122) // ERROR_INSUFFICIENT_BUFFER
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throw new Win32Exception(errCode, "AdjustTokenPrivileges() failed to get old state size");
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}
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// resize the oldStatePtr based on the length returned from Windows
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Marshal.FreeHGlobal(oldStatePtr);
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oldStatePtr = Marshal.AllocHGlobal((int)returnLength);
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try
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{
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bool res = NativeMethods.AdjustTokenPrivileges(hToken, disableAllPrivileges, newStatePtr, returnLength, oldStatePtr, out returnLength);
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int errCode = Marshal.GetLastWin32Error();
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// even when res == true, ERROR_NOT_ALL_ASSIGNED may be set as the last error code
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if (!res || errCode != 0)
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throw new Win32Exception(errCode, "AdjustTokenPrivileges() failed");
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// Marshal the oldStatePtr to the struct
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NativeHelpers.TOKEN_PRIVILEGES oldState = (NativeHelpers.TOKEN_PRIVILEGES)Marshal.PtrToStructure(oldStatePtr, typeof(NativeHelpers.TOKEN_PRIVILEGES));
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oldStatePrivileges = new NativeHelpers.LUID_AND_ATTRIBUTES[oldState.PrivilegeCount];
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PtrToStructureArray(oldStatePrivileges, IntPtr.Add(oldStatePtr, Marshal.SizeOf(oldState.PrivilegeCount)));
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}
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finally
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{
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Marshal.FreeHGlobal(oldStatePtr);
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}
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}
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finally
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{
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NativeMethods.CloseHandle(hToken);
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}
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}
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finally
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{
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if (newStatePtr != IntPtr.Zero)
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Marshal.FreeHGlobal(newStatePtr);
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}
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return oldStatePrivileges.ToDictionary(p => GetPrivilegeName(p.Luid), p => (bool?)p.Attributes.HasFlag(PrivilegeAttributes.Enabled));
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}
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private static string GetPrivilegeName(NativeHelpers.LUID luid)
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{
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UInt32 nameLen = 0;
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NativeMethods.LookupPrivilegeName(null, ref luid, null, ref nameLen);
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StringBuilder name = new StringBuilder((int)(nameLen + 1));
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if (!NativeMethods.LookupPrivilegeName(null, ref luid, name, ref nameLen))
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throw new Win32Exception("LookupPrivilegeName() failed");
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return name.ToString();
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}
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private static void PtrToStructureArray<T>(T[] array, IntPtr ptr)
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{
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IntPtr ptrOffset = ptr;
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for (int i = 0; i < array.Length; i++, ptrOffset = IntPtr.Add(ptrOffset, Marshal.SizeOf(typeof(T))))
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array[i] = (T)Marshal.PtrToStructure(ptrOffset, typeof(T));
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}
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private static int StructureToBytes<T>(T structure, byte[] array, int offset)
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{
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int size = Marshal.SizeOf(structure);
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IntPtr structPtr = Marshal.AllocHGlobal(size);
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try
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{
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Marshal.StructureToPtr(structure, structPtr, false);
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Marshal.Copy(structPtr, array, offset, size);
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}
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finally
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{
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Marshal.FreeHGlobal(structPtr);
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}
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return size;
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}
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}
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}
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'@
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#AnsibleRequires -CSharpUtil Ansible.Privilege
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Function Import-PrivilegeUtil {
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<#
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.SYNOPSIS
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Compiles the C# code that can be used to manage Windows privileges from an
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Ansible module. Once this function is called, the following PowerShell
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cmdlets can be used;
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Get-AnsiblePrivilege
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Set-AnsiblePrivilege
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The above cmdlets give the ability to manage permissions on the current
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process token but the underlying .NET classes are also exposed for greater
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control. The following functions can be used by calling the .NET class
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[Ansible.PrivilegeUtil.Privileges]::CheckPrivilegeName($name)
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[Ansible.PrivilegeUtil.Privileges]::DisablePrivilege($process, $name)
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[Ansible.PrivilegeUtil.Privileges]::DisableAllPrivileges($process)
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[Ansible.PrivilegeUtil.Privileges]::EnablePrivilege($process, $name)
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[Ansible.PrivilegeUtil.Privileges]::GetAllPrivilegeInfo($process)
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[Ansible.PrivilegeUtil.Privileges]::RemovePrivilege($process, $name)
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[Ansible.PrivilegeUtil.Privileges]::SetTokenPrivileges($process, $new_state)
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Here is a brief explanation of each type of arg
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$process = The process handle to manipulate, use '[Ansible.PrivilegeUtils.Privileges]::GetCurrentProcess()' to get the current process handle
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$name = The name of the privilege, this is the constant value from https://docs.microsoft.com/en-us/windows/desktop/SecAuthZ/privilege-constants, e.g. SeAuditPrivilege
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$new_state = 'System.Collections.Generic.Dictionary`2[[System.String], [System.Nullable`1[System.Boolean]]]'
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The key is the constant name as a string, the value is a ternary boolean where
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true - will enable the privilege
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false - will disable the privilege
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null - will remove the privilege
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Each method that changes the privilege state will return a dictionary that
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can be used as the $new_state arg of SetTokenPrivileges to undo and revert
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back to the original state. If you remove a privilege then this is
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irreversible and won't be part of the returned dict
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No-op, as the C# types are automatically loaded.
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#>
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[CmdletBinding()]
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# build the C# code to compile
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$namespace_import = ($ansible_privilege_util_namespaces | ForEach-Object { "using $_;" }) -join "`r`n"
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$platform_util = "$namespace_import`r`n`r`n$ansible_privilege_util_code"
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# FUTURE: find a better way to get the _ansible_remote_tmp variable
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# this is used to force csc to compile the C# code in the remote tmp
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# specified
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$original_tmp = $env:TMP
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$remote_tmp = $original_tmp
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$module_params = Get-Variable -Name complex_args -ErrorAction SilentlyContinue
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if ($module_params) {
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if ($module_params.Value.ContainsKey("_ansible_remote_tmp") ) {
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$remote_tmp = $module_params.Value["_ansible_remote_tmp"]
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$remote_tmp = [System.Environment]::ExpandEnvironmentVariables($remote_tmp)
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Param()
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$msg = "Import-PrivilegeUtil is deprecated and no longer needed, this cmdlet will be removed in a future version"
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if ((Get-Command -Name Add-DeprecationWarning -ErrorAction SilentlyContinue) -and (Get-Variable -Name result -ErrorAction SilentlyContinue)) {
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Add-DeprecationWarning -obj $result.Value -message $msg -version 2.12
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} else {
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$module = Get-Variable -Name module -ErrorAction SilentlyContinue
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if ($null -ne $module -and $module.Value.GetType().FullName -eq "Ansible.Basic.AnsibleModule") {
|
||||
$module.Value.Deprecate($msg, "2.12")
|
||||
}
|
||||
}
|
||||
|
||||
$env:TMP = $remote_tmp
|
||||
Add-Type -TypeDefinition $platform_util
|
||||
$env:TMP = $original_tmp
|
||||
}
|
||||
|
||||
Function Get-AnsiblePrivilege {
|
||||
|
|
@ -440,15 +40,15 @@ Function Get-AnsiblePrivilege {
|
|||
[Parameter(Mandatory=$true)][String]$Name
|
||||
)
|
||||
|
||||
if (-not [Ansible.PrivilegeUtil.Privileges]::CheckPrivilegeName($Name)) {
|
||||
if (-not [Ansible.Privilege.PrivilegeUtil]::CheckPrivilegeName($Name)) {
|
||||
throw [System.ArgumentException] "Invalid privilege name '$Name'"
|
||||
}
|
||||
|
||||
$process_token = [Ansible.PrivilegeUtil.Privileges]::GetCurrentProcess()
|
||||
$privilege_info = [Ansible.PrivilegeUtil.Privileges]::GetAllPrivilegeInfo($process_token)
|
||||
$process_token = [Ansible.Privilege.PrivilegeUtil]::GetCurrentProcess()
|
||||
$privilege_info = [Ansible.Privilege.PrivilegeUtil]::GetAllPrivilegeInfo($process_token)
|
||||
if ($privilege_info.ContainsKey($Name)) {
|
||||
$status = $privilege_info.$Name
|
||||
return $status.HasFlag([Ansible.PrivilegeUtil.PrivilegeAttributes]::Enabled)
|
||||
return $status.HasFlag([Ansible.Privilege.PrivilegeAttributes]::Enabled)
|
||||
} else {
|
||||
return $null
|
||||
}
|
||||
|
|
@ -487,13 +87,13 @@ Function Set-AnsiblePrivilege {
|
|||
throw [System.InvalidOperationException] "Cannot $($action.ToLower()) the privilege '$Name' as it has been removed from the token"
|
||||
}
|
||||
|
||||
$process_token = [Ansible.PrivilegeUtil.Privileges]::GetCurrentProcess()
|
||||
$process_token = [Ansible.Privilege.PrivilegeUtil]::GetCurrentProcess()
|
||||
if ($PSCmdlet.ShouldProcess($Name, "$action the privilege $Name")) {
|
||||
$new_state = New-Object -TypeName 'System.Collections.Generic.Dictionary`2[[System.String], [System.Nullable`1[System.Boolean]]]'
|
||||
$new_state.Add($Name, $Value)
|
||||
[Ansible.PrivilegeUtil.Privileges]::SetTokenPrivileges($process_token, $new_state) > $null
|
||||
[Ansible.Privilege.PrivilegeUtil]::SetTokenPrivileges($process_token, $new_state) > $null
|
||||
}
|
||||
}
|
||||
|
||||
Export-ModuleMember -Function Import-PrivilegeUtil, Get-AnsiblePrivilege, Set-AnsiblePrivilege `
|
||||
-Variable ansible_privilege_util_namespaces, ansible_privilege_util_code
|
||||
Export-ModuleMember -Function Import-PrivilegeUtil, Get-AnsiblePrivilege, Set-AnsiblePrivilege
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue