Functions/Grant-ComPermission.ps1
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# Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. function Grant-CComPermission { <# .SYNOPSIS Grants COM access permissions. .DESCRIPTION Calling this function is equivalent to opening Component Services (dcomcnfg), right-clicking `My Computer` under Component Services > Computers, choosing `Properties`, going to the `COM Security` tab, and modifying the permission after clicking the `Edit Limits...` or `Edit Default...` buttons under the `Access Permissions` section. You must set at least one of the `LocalAccess` or `RemoteAccess` switches. .OUTPUTS Carbon.Security.ComAccessRule. .LINK Get-CComPermission .LINK Revoke-CComPermission .EXAMPLE Grant-CComPermission -Access -Identity 'Users' -Allow -Default -Local Updates access permission default security to allow the local `Users` group local access permissions. .EXAMPLE Grant-CComPermission -LaunchAndActivation -Identity 'Users' -Limits -Deny -Local -Remote Updates access permission security limits to deny the local `Users` group local and remote access permissions. #> [CmdletBinding()] param( [Parameter(Mandatory=$true)] [string] $Identity, [Parameter(Mandatory=$true,ParameterSetName='DefaultAccessPermissionAllow')] [Parameter(Mandatory=$true,ParameterSetName='MachineAccessRestrictionAllow')] [Parameter(Mandatory=$true,ParameterSetName='DefaultAccessPermissionDeny')] [Parameter(Mandatory=$true,ParameterSetName='MachineAccessRestrictionDeny')] [Switch] # Grants Access Permissions. $Access, [Parameter(Mandatory=$true,ParameterSetName='DefaultLaunchPermissionAllow')] [Parameter(Mandatory=$true,ParameterSetName='MachineLaunchRestrictionAllow')] [Parameter(Mandatory=$true,ParameterSetName='DefaultLaunchPermissionDeny')] [Parameter(Mandatory=$true,ParameterSetName='MachineLaunchRestrictionDeny')] [Switch] # Grants Launch and Activation Permissions. $LaunchAndActivation, [Parameter(Mandatory=$true,ParameterSetName='DefaultAccessPermissionAllow')] [Parameter(Mandatory=$true,ParameterSetName='DefaultLaunchPermissionAllow')] [Parameter(Mandatory=$true,ParameterSetName='DefaultAccessPermissionDeny')] [Parameter(Mandatory=$true,ParameterSetName='DefaultLaunchPermissionDeny')] [Switch] # Grants default security permissions. $Default, [Parameter(Mandatory=$true,ParameterSetName='MachineAccessRestrictionAllow')] [Parameter(Mandatory=$true,ParameterSetName='MachineLaunchRestrictionAllow')] [Parameter(Mandatory=$true,ParameterSetName='MachineAccessRestrictionDeny')] [Parameter(Mandatory=$true,ParameterSetName='MachineLaunchRestrictionDeny')] [Switch] # Grants security limits permissions. $Limits, [Parameter(Mandatory=$true,ParameterSetName='DefaultAccessPermissionAllow')] [Parameter(Mandatory=$true,ParameterSetName='MachineAccessRestrictionAllow')] [Parameter(Mandatory=$true,ParameterSetName='DefaultLaunchPermissionAllow')] [Parameter(Mandatory=$true,ParameterSetName='MachineLaunchRestrictionAllow')] [Switch] # If set, allows the given permissions. $Allow, [Parameter(Mandatory=$true,ParameterSetName='DefaultAccessPermissionDeny')] [Parameter(Mandatory=$true,ParameterSetName='MachineAccessRestrictionDeny')] [Parameter(Mandatory=$true,ParameterSetName='DefaultLaunchPermissionDeny')] [Parameter(Mandatory=$true,ParameterSetName='MachineLaunchRestrictionDeny')] [Switch] # If set, denies the given permissions. $Deny, [Parameter(ParameterSetName='DefaultAccessPermissionAllow')] [Parameter(ParameterSetName='MachineAccessRestrictionAllow')] [Parameter(ParameterSetName='DefaultAccessPermissionDeny')] [Parameter(ParameterSetName='MachineAccessRestrictionDeny')] [Switch] # If set, grants local access permissions. Only valid if `Access` switch is set. $Local, [Parameter(ParameterSetName='DefaultAccessPermissionAllow')] [Parameter(ParameterSetName='MachineAccessRestrictionAllow')] [Parameter(ParameterSetName='DefaultAccessPermissionDeny')] [Parameter(ParameterSetName='MachineAccessRestrictionDeny')] [Switch] # If set, grants remote access permissions. Only valid if `Access` switch is set. $Remote, [Parameter(ParameterSetName='DefaultLaunchPermissionAllow')] [Parameter(ParameterSetName='MachineLaunchRestrictionAllow')] [Parameter(ParameterSetName='DefaultLaunchPermissionDeny')] [Parameter(ParameterSetName='MachineLaunchRestrictionDeny')] [Switch] # If set, grants local launch permissions. Only valid if `LaunchAndActivation` switch is set. $LocalLaunch, [Parameter(ParameterSetName='DefaultLaunchPermissionAllow')] [Parameter(ParameterSetName='MachineLaunchRestrictionAllow')] [Parameter(ParameterSetName='DefaultLaunchPermissionDeny')] [Parameter(ParameterSetName='MachineLaunchRestrictionDeny')] [Switch] # If set, grants remote launch permissions. Only valid if `LaunchAndActivation` switch is set. $RemoteLaunch, [Parameter(ParameterSetName='DefaultLaunchPermissionAllow')] [Parameter(ParameterSetName='MachineLaunchRestrictionAllow')] [Parameter(ParameterSetName='DefaultLaunchPermissionDeny')] [Parameter(ParameterSetName='MachineLaunchRestrictionDeny')] [Switch] # If set, grants local activation permissions. Only valid if `LaunchAndActivation` switch is set. $LocalActivation, [Parameter(ParameterSetName='DefaultLaunchPermissionAllow')] [Parameter(ParameterSetName='MachineLaunchRestrictionAllow')] [Parameter(ParameterSetName='DefaultLaunchPermissionDeny')] [Parameter(ParameterSetName='MachineLaunchRestrictionDeny')] [Switch] # If set, grants remote activation permissions. Only valid if `LaunchAndActivation` switch is set. $RemoteActivation, [Switch] # Return a `Carbon.Security.ComAccessRights` object for the permissions granted. $PassThru ) Set-StrictMode -Version 'Latest' Use-CallerPreference -Cmdlet $PSCmdlet -Session $ExecutionContext.SessionState $account = Resolve-CIdentity -Name $Identity -ErrorAction:$ErrorActionPreference if( -not $account ) { return } $comArgs = @{ } if( $pscmdlet.ParameterSetName -like 'Default*' ) { $typeDesc = 'default security permissions' $comArgs.Default = $true } else { $typeDesc = 'security limits' $comArgs.Limits = $true } if( $pscmdlet.ParameterSetName -like '*Access*' ) { $permissionsDesc = 'Access' $comArgs.Access = $true } else { $permissionsDesc = 'Launch and Activation' $comArgs.LaunchAndActivation = $true } $currentSD = Get-CComSecurityDescriptor @comArgs -ErrorAction:$ErrorActionPreference $newSd = ([wmiclass]'win32_securitydescriptor').CreateInstance() $newSd.ControlFlags = $currentSD.ControlFlags $newSd.Group = $currentSD.Group $newSd.Owner = $currentSD.Owner $trustee = ([wmiclass]'win32_trustee').CreateInstance() $trustee.SIDString = $account.Sid.Value $ace = ([wmiclass]'win32_ace').CreateInstance() $accessMask = [Carbon.Security.ComAccessRights]::Execute if( $Local -or $LocalLaunch ) { $accessMask = $accessMask -bor [Carbon.Security.ComAccessRights]::ExecuteLocal } if( $Remote -or $RemoteLaunch ) { $accessMask = $accessMask -bor [Carbon.Security.ComAccessRights]::ExecuteRemote } if( $LocalActivation ) { $accessMask = $accessMask -bor [Carbon.Security.ComAccessRights]::ActivateLocal } if( $RemoteActivation ) { $accessMask = $accessMask -bor [Carbon.Security.ComAccessRights]::ActivateRemote } Write-Verbose ("Granting {0} {1} COM {2} {3}." -f $Identity,([Carbon.Security.ComAccessRights]$accessMask),$permissionsDesc,$typeDesc) $ace.AccessMask = $accessMask $ace.Trustee = $trustee # Remove DACL for this user, if it exists, so we can replace it. $newDacl = $currentSD.DACL | Where-Object { $_.Trustee.SIDString -ne $trustee.SIDString } | ForEach-Object { $_.PsObject.BaseObject } $newDacl += $ace.PsObject.BaseObject $newSd.DACL = $newDacl $converter = New-Object Management.ManagementClass 'Win32_SecurityDescriptorHelper' $sdBytes = $converter.Win32SDToBinarySD( $newSd ) $regValueName = $pscmdlet.ParameterSetName -replace '(Allow|Deny)$','' Set-CRegistryKeyValue -Path $ComRegKeyPath -Name $regValueName -Binary $sdBytes.BinarySD -Quiet -ErrorAction:$ErrorActionPreference if( $PassThru ) { Get-CComPermission -Identity $Identity @comArgs -ErrorAction:$ErrorActionPreference } } Set-Alias -Name 'Grant-ComPermissions' -Value 'Grant-CComPermission' |