cWindowsServiceDSC.psm1
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enum Ensure { Absent Present } enum StartupType { Automatic AutomaticDelayed Disabled Manual } enum RecoveryType { Restart Reboot } function Set-CurrentRecoveryType { param($original, [WindowsServiceDSC]$strongTypedOutput) switch -Wildcard ($original) { "*RESTART*" { $strongTypedOutput.ServiceCurrentRecoveryType += 'Restart' break } "*REBOOT*" { $strongTypedOutput.ServiceCurrentRecoveryType += 'Reboot' break } } } <# .SYNOPSIS Grants the 'Log on as a service' right to the user with the given username. .PARAMETER Username The username of the user to grant 'Log on as a service' right to #> function Grant-LogOnAsServiceRight { [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [System.String] $Username ) $logOnAsServiceText = @" namespace LogOnAsServiceHelper { using Microsoft.Win32.SafeHandles; using System; using System.Runtime.ConstrainedExecution; using System.Runtime.InteropServices; using System.Security; public class NativeMethods { #region constants // from ntlsa.h private const int POLICY_LOOKUP_NAMES = 0x00000800; private const int POLICY_CREATE_ACCOUNT = 0x00000010; private const uint ACCOUNT_ADJUST_SYSTEM_ACCESS = 0x00000008; private const uint ACCOUNT_VIEW = 0x00000001; private const uint SECURITY_ACCESS_SERVICE_LOGON = 0x00000010; // from LsaUtils.h private const uint STATUS_OBJECT_NAME_NOT_FOUND = 0xC0000034; // from lmcons.h private const int UNLEN = 256; private const int DNLEN = 15; // Extra characteres for '\', '@' etc. private const int EXTRA_LENGTH = 3; #endregion constants #region interop structures /// <summary> /// Used to open a policy, but not containing anything meaqningful /// </summary> [StructLayout(LayoutKind.Sequential)] private struct LSA_OBJECT_ATTRIBUTES { public UInt32 Length; public IntPtr RootDirectory; public IntPtr ObjectName; public UInt32 Attributes; public IntPtr SecurityDescriptor; public IntPtr SecurityQualityOfService; public void Initialize() { this.Length = 0; this.RootDirectory = IntPtr.Zero; this.ObjectName = IntPtr.Zero; this.Attributes = 0; this.SecurityDescriptor = IntPtr.Zero; this.SecurityQualityOfService = IntPtr.Zero; } } /// <summary> /// LSA string /// </summary> [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)] private struct LSA_UNICODE_STRING { internal ushort Length; internal ushort MaximumLength; [MarshalAs(UnmanagedType.LPWStr)] internal string Buffer; internal void Set(string src) { this.Buffer = src; this.Length = (ushort)(src.Length * sizeof(char)); this.MaximumLength = (ushort)(this.Length + sizeof(char)); } } /// <summary> /// Structure used as the last parameter for LSALookupNames /// </summary> [StructLayout(LayoutKind.Sequential)] private struct LSA_TRANSLATED_SID2 { public uint Use; public IntPtr SID; public int DomainIndex; public uint Flags; }; #endregion interop structures #region safe handles /// <summary> /// Handle for LSA objects including Policy and Account /// </summary> private class LsaSafeHandle : SafeHandleZeroOrMinusOneIsInvalid { [DllImport("advapi32.dll")] private static extern uint LsaClose(IntPtr ObjectHandle); /// <summary> /// Prevents a default instance of the LsaPolicySafeHAndle class from being created. /// </summary> private LsaSafeHandle(): base(true) { } /// <summary> /// Calls NativeMethods.CloseHandle(handle) /// </summary> /// <returns>the return of NativeMethods.CloseHandle(handle)</returns> [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)] protected override bool ReleaseHandle() { long returnValue = LsaSafeHandle.LsaClose(this.handle); return returnValue != 0; } } /// <summary> /// Handle for IntPtrs returned from Lsa calls that have to be freed with /// LsaFreeMemory /// </summary> private class SafeLsaMemoryHandle : SafeHandleZeroOrMinusOneIsInvalid { [DllImport("advapi32")] internal static extern int LsaFreeMemory(IntPtr Buffer); private SafeLsaMemoryHandle() : base(true) { } private SafeLsaMemoryHandle(IntPtr handle) : base(true) { SetHandle(handle); } private static SafeLsaMemoryHandle InvalidHandle { get { return new SafeLsaMemoryHandle(IntPtr.Zero); } } override protected bool ReleaseHandle() { return SafeLsaMemoryHandle.LsaFreeMemory(handle) == 0; } internal IntPtr Memory { get { return this.handle; } } } #endregion safe handles #region interop function declarations /// <summary> /// Opens LSA Policy /// </summary> [DllImport("advapi32.dll", SetLastError = true, PreserveSig = true)] private static extern uint LsaOpenPolicy( IntPtr SystemName, ref LSA_OBJECT_ATTRIBUTES ObjectAttributes, uint DesiredAccess, out LsaSafeHandle PolicyHandle ); /// <summary> /// Convert the name into a SID which is used in remaining calls /// </summary> [DllImport("advapi32", CharSet = CharSet.Unicode, SetLastError = true), SuppressUnmanagedCodeSecurityAttribute] private static extern uint LsaLookupNames2( LsaSafeHandle PolicyHandle, uint Flags, uint Count, LSA_UNICODE_STRING[] Names, out SafeLsaMemoryHandle ReferencedDomains, out SafeLsaMemoryHandle Sids ); /// <summary> /// Opens the LSA account corresponding to the user's SID /// </summary> [DllImport("advapi32.dll", SetLastError = true, PreserveSig = true)] private static extern uint LsaOpenAccount( LsaSafeHandle PolicyHandle, IntPtr Sid, uint Access, out LsaSafeHandle AccountHandle); /// <summary> /// Creates an LSA account corresponding to the user's SID /// </summary> [DllImport("advapi32.dll", SetLastError = true, PreserveSig = true)] private static extern uint LsaCreateAccount( LsaSafeHandle PolicyHandle, IntPtr Sid, uint Access, out LsaSafeHandle AccountHandle); /// <summary> /// Gets the LSA Account access /// </summary> [DllImport("advapi32.dll", SetLastError = true, PreserveSig = true)] private static extern uint LsaGetSystemAccessAccount( LsaSafeHandle AccountHandle, out uint SystemAccess); /// <summary> /// Sets the LSA Account access /// </summary> [DllImport("advapi32.dll", SetLastError = true, PreserveSig = true)] private static extern uint LsaSetSystemAccessAccount( LsaSafeHandle AccountHandle, uint SystemAccess); #endregion interop function declarations /// <summary> /// Sets the Log On As A Service Policy for <paramref name="userName"/>, if not already set. /// </summary> /// <param name="userName">the user name we want to allow logging on as a service</param> /// <exception cref="ArgumentNullException">If the <paramref name="userName"/> is null or empty.</exception> /// <exception cref="InvalidOperationException">In the following cases: /// Failure opening the LSA Policy. /// The <paramref name="userName"/> is too large. /// Failure looking up the user name. /// Failure opening LSA account (other than account not found). /// Failure creating LSA account. /// Failure getting LSA account policy access. /// Failure setting LSA account policy access. /// </exception> public static void SetLogOnAsServicePolicy(string userName) { if (String.IsNullOrEmpty(userName)) { throw new ArgumentNullException("userName"); } LSA_OBJECT_ATTRIBUTES objectAttributes = new LSA_OBJECT_ATTRIBUTES(); objectAttributes.Initialize(); // All handles are delcared in advance so they can be closed on finally LsaSafeHandle policyHandle = null; SafeLsaMemoryHandle referencedDomains = null; SafeLsaMemoryHandle sids = null; LsaSafeHandle accountHandle = null; try { uint status = LsaOpenPolicy( IntPtr.Zero, ref objectAttributes, POLICY_LOOKUP_NAMES | POLICY_CREATE_ACCOUNT, out policyHandle); if (status != 0) { throw new InvalidOperationException("CannotOpenPolicyErrorMessage"); } // Unicode strings have a maximum length of 32KB. We don't want to create // LSA strings with more than that. User lengths are much smaller so this check // ensures userName's length is useful if (userName.Length > UNLEN + DNLEN + EXTRA_LENGTH) { throw new InvalidOperationException("UserNameTooLongErrorMessage"); } LSA_UNICODE_STRING lsaUserName = new LSA_UNICODE_STRING(); lsaUserName.Set(userName); LSA_UNICODE_STRING[] names = new LSA_UNICODE_STRING[1]; names[0].Set(userName); status = LsaLookupNames2( policyHandle, 0, 1, new LSA_UNICODE_STRING[] { lsaUserName }, out referencedDomains, out sids); if (status != 0) { throw new InvalidOperationException("CannotLookupNamesErrorMessage"); } LSA_TRANSLATED_SID2 sid = (LSA_TRANSLATED_SID2)Marshal.PtrToStructure(sids.Memory, typeof(LSA_TRANSLATED_SID2)); status = LsaOpenAccount(policyHandle, sid.SID, ACCOUNT_VIEW | ACCOUNT_ADJUST_SYSTEM_ACCESS, out accountHandle); uint currentAccess = 0; if (status == 0) { status = LsaGetSystemAccessAccount(accountHandle, out currentAccess); if (status != 0) { throw new InvalidOperationException("CannotGetAccountAccessErrorMessage"); } } else if (status == STATUS_OBJECT_NAME_NOT_FOUND) { status = LsaCreateAccount( policyHandle, sid.SID, ACCOUNT_ADJUST_SYSTEM_ACCESS, out accountHandle); if (status != 0) { throw new InvalidOperationException("CannotCreateAccountAccessErrorMessage"); } } else { throw new InvalidOperationException("CannotOpenAccountErrorMessage"); } if ((currentAccess & SECURITY_ACCESS_SERVICE_LOGON) == 0) { status = LsaSetSystemAccessAccount( accountHandle, currentAccess | SECURITY_ACCESS_SERVICE_LOGON); if (status != 0) { throw new InvalidOperationException("CannotSetAccountAccessErrorMessage"); } } } finally { if (policyHandle != null) { policyHandle.Close(); } if (referencedDomains != null) { referencedDomains.Close(); } if (sids != null) { sids.Close(); } if (accountHandle != null) { accountHandle.Close(); } } } } } "@ try { $null = [LogOnAsServiceHelper.NativeMethods] } catch { $null = Add-Type $logOnAsServiceText -PassThru } if ($Username.StartsWith('.\')) { $Username = $Username.Substring(2) } try { [LogOnAsServiceHelper.NativeMethods]::SetLogOnAsServicePolicy($Username) } catch { throw } } <# .SYNOPSIS Converts the given username to the string version of it that would be expected in a service's StartName property. .PARAMETER Username The username to convert. #> function ConvertTo-StartName { [OutputType([System.String])] [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [System.String] $Username ) $startName = $Username if ($Username -ieq 'NetworkService' -or $Username -ieq 'LocalService' -or $Username -ieq 'LocalSystem') { $startName = "NT Authority\$Username" return $startName } if (-not $Username.Contains('\') -and -not $Username.Contains('@')) { $startName = ".\$Username" return $startName } if ($Username.StartsWith("$env:computerName\")) { $startName = $Username.Replace($env:computerName, '.') return $startName } return $startName } [DscResource()] class WindowsServiceDSC { [DscProperty(Key)] [String]$ServiceName [DscProperty(NotConfigurable)] [Ensure]$ServiceExists [DscProperty(NotConfigurable)] [StartupType]$ServiceCurrentStartupType [DscProperty(NotConfigurable)] [RecoveryType[]]$ServiceCurrentRecoveryType [DscProperty(NotConfigurable)] [String]$ServiceUser [DscProperty(Mandatory = $true)] [Ensure]$Ensure [DscProperty(Mandatory = $false)] [RecoveryType]$RecoveryType = [RecoveryType]::Restart [DscProperty(Mandatory = $false)] [StartupType]$StartupType = [StartupType]::Automatic [DscProperty(Mandatory = $false)] [System.Management.Automation.PSCredential] [System.Management.Automation.Credential()] $Credential = (New-Object -TypeName pscredential -ArgumentList 'NT AUTHORITY\SYSTEM', $(ConvertTo-SecureString -AsPlainText -Force -string 'whatever')) # Gets the resource's current state. [WindowsServiceDSC] Get() { try { Get-Service $this.ServiceName -ErrorAction 'stop' $this.ServiceExists = 'Present' $servieConfig = (sc.exe qc "$($this.ServiceName)")[4].trim() switch ($servieConfig) { "START_TYPE : 2 AUTO_START" { $this.ServiceCurrentStartupType = 'Automatic' } "START_TYPE : 2 AUTO_START (DELAYED)" { $this.ServiceCurrentStartupType = 'AutomaticDelayed' } "START_TYPE : 3 DEMAND_START" { $this.ServiceCurrentStartupType = 'Manual' } "START_TYPE : 4 DISABLED" { $this.ServiceCurrentStartupType = 'Disabled' } } $serviceRecoveryConfig = (sc.exe qfailure "$($this.ServiceName)").trim() #First Failure Recovery Set-CurrentRecoveryType $serviceRecoveryConfig[6] ([ref]$this) #Second Failure Recovery Set-CurrentRecoveryType $serviceRecoveryConfig[7] ([ref]$this) #Third Failure Recovery Set-CurrentRecoveryType $serviceRecoveryConfig[8] ([ref]$this) $this.ServiceUser = (Get-WmiObject -Class Win32_Service -Filter "name='$($this.ServiceName)'").Startname } catch #[Microsoft.PowerShell.Commands.ServiceCommandException] Cannot find this exception type { $this.ServiceExists = 'Absent' } return $this } # Sets the desired state of the resource. [void] Set() { Write-Verbose "Desired State is: $($this.ServiceName) $($this.Ensure)" Write-Verbose "Desired State is: $($this.ServiceName) StartupType $($this.StartupType))" Write-Verbose "Desired State is: $($this.ServiceName) RecoveryType $($this.RecoveryType)" Write-Verbose "Desired State is: $($this.ServiceName) ServiceUser $($this.ServiceUser)" $ServiceInfo = $this.Get() if ($ServiceInfo.ServiceCurrentStartupType -ne $this.StartupType) { Write-Verbose "Setting $($this.ServiceName) StartupType to $($this.StartupType)" switch ($this.StartupType) { 'Automatic' { sc.exe config ($this.ServiceName) start= auto | Write-Verbose break } 'AutomaticDelayed' { sc.exe config ($this.ServiceName) start= delayed-auto | Write-Verbose break } 'Disabled' { sc.exe config ($this.ServiceName) start= disabled | Write-Verbose break } 'Manual' { sc.exe config ($this.ServiceName) start= demand | Write-Verbose break } } } if ($ServiceInfo.ServiceCurrentRecoveryType.Where{ $_ -notin $this.RecoveryType } -or $ServiceInfo.ServiceCurrentRecoveryType.Where{ ![string]::IsNullOrWhiteSpace($_) }.count -ne 3) { Write-Verbose "Setting $($this.ServiceName) RecoveryType to $($this.RecoveryType)" switch ($this.RecoveryType) { 'Restart' { sc.exe failure ($this.ServiceName) reset= 3600 actions= restart/60000/restart/60000/restart/60000 | Write-Verbose break } 'REBOOT' { sc.exe failure ($this.ServiceName) reset= 3600 actions= reboot/60000/reboot/60000/reboot/60000 | Write-Verbose break } } } if ($ServiceInfo.ServiceUser -ne $this.Credential.UserName) { $serviceCimInstance = Get-CimInstance -ClassName 'Win32_Service' -Filter "Name='$($this.ServiceName)'" $changeServiceArguments = @{} Write-Verbose "Setting Service $($this.Servicename) User from $($ServiceInfo.ServiceUser) to $($this.Credential.UserName)" $startName = ConvertTo-StartName -Username $this.Credential.UserName Write-Verbose "The service startName is $startName" Grant-LogOnAsServiceRight -Username $startName $changeServiceArguments['StartName'] = $startName If($this.Credential.GetNetworkCredential().Password) { $changeServiceArguments['StartPassword'] = $this.Credential.GetNetworkCredential().Password } $changeServiceResult = Invoke-CimMethod -InputObject $ServiceCimInstance -MethodName 'Change' -Arguments $changeServiceArguments if ($changeServiceResult.ReturnValue -ne 0) { throw "Service $($this.Servicename) credential change failed with error code $($changeServiceResult.ReturnValue)" } } } # Tests if the resource is in the desired state. [bool] Test() { $ServiceInfo = $this.Get() if ($ServiceInfo.ServiceExists -ne $this.Ensure) { Write-Verbose "$($this.ServiceName) expects to be $($this.Ensure), But $($ServiceInfo.ServiceExists)" return $false } if ($ServiceInfo.ServiceCurrentStartupType -ne $this.StartupType) { Write-Verbose "$($this.ServiceName) StartupType expects to be $($this.StartupType), But $($ServiceInfo.ServiceCurrentStartupType)" return $false } if ($ServiceInfo.ServiceCurrentRecoveryType.Where{ $_ -notin $this.RecoveryType } -or $ServiceInfo.ServiceCurrentRecoveryType.Where{ ![string]::IsNullOrWhiteSpace($_) }.count -ne 3) { Write-Verbose "$($this.ServiceName) RecoveryType expects to be $($this.RecoveryType), But $($ServiceInfo.ServiceCurrentRecoveryType)" return $false } if ($ServiceInfo.ServiceUser -ne $this.Credential.UserName) { Write-Verbose "$($this.ServiceName) User expects to be $($this.Credential.UserName), But $($ServiceInfo.ServiceUser)" return $false } Write-Verbose "$($this.ServiceName) RecoveryType: $($this.ServiceCurrentRecoveryType):$($this.ServiceCurrentRecoveryType.count), StartupType: $($this.ServiceCurrentStartupType)" return $true } } |