internal/functions/Build-ExemptionsPlan.ps1
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function Build-ExemptionsPlan { [CmdletBinding()] param ( [string] $ExemptionsRootFolder, [string] $ExemptionsAreNotManagedMessage, [hashtable] $PacEnvironment, [hashtable] $AllAssignments, [hashtable] $Assignments, [hashtable] $DeployedExemptions, [hashtable] $Exemptions ) Write-Information "===================================================================================================" Write-Information "Processing Policy Exemption files in folder '$ExemptionsRootFolder'" Write-Information "===================================================================================================" if ($ExemptionsAreNotManagedMessage -eq "") { [array] $exemptionFiles = @() # Do not manage exemptions if directory does not exist $exemptionFiles += Get-ChildItem -Path $ExemptionsRootFolder -Recurse -File -Filter "*.json" $exemptionFiles += Get-ChildItem -Path $ExemptionsRootFolder -Recurse -File -Filter "*.jsonc" $exemptionFiles += Get-ChildItem -Path $ExemptionsRootFolder -Recurse -File -Filter "*.csv" $allExemptions = @{} $deployedManagedExemptions = $DeployedExemptions.managed $deleteCandidates = Get-HashtableShallowClone $deployedManagedExemptions $replacedAssignments = $Assignments.replace if ($exemptionFiles.Length -eq 0) { Write-Warning "No Policy Exemption files found." Write-Warning "All exemptions will be deleted!" Write-Information "" } else { Write-Information "Number of Policy Exemption files = $($exemptionFiles.Length)" $now = Get-Date -AsUTC $numberOfFilesWithErrors = 0 foreach ($file in $exemptionFiles) { #region read each file $extension = $file.Extension $fullName = $file.FullName Write-Information "Processing file '$($fullName)'" $errorInfo = New-ErrorInfo -FileName $fullName $exemptionsArray = @() $isXls = $false if ($extension -eq ".json" -or $extension -eq ".jsonc") { $content = Get-Content -Path $fullName -Raw -ErrorAction Stop if (!(Test-Json $content)) { Build-ErrorString -ErrorInfo $errorInfo -ErrorText "Invalid JSON" } else { $jsonObj = ConvertFrom-Json $content -AsHashTable -Depth 100 Write-Information "" if ($null -ne $jsonObj) { $jsonExemptions = $jsonObj.exemptions if ($null -ne $jsonExemptions -and $jsonExemptions.Count -gt 0) { $exemptionsArray += $jsonExemptions } } } } elseif ($extension -eq ".csv") { $content = Get-Content -Path $fullName -Raw -ErrorAction Stop $xlsExemptions = ($content | ConvertFrom-Csv -ErrorAction Stop) if ($xlsExemptions.Count -gt 0) { $exemptionsArray += $xlsExemptions } } #endregion read each file #region validate file contents if ($errorInfo.hasErrors) { Confirm-PolicyDefinitionUsedExists } $entryNumber = $isXls ? 1 : 0 foreach ($row in $emptionsArray) { $name = $row.name $displayName = $row.displayName $exemptionCategory = $row.exemptionCategory $scope = $row.scope $policyAssignmentId = $row.policyAssignmentId $description = $row.description $assignmentScopeValidation = $row.assignmentScopeValidation $resourceSelectors = $row.resourceSelectors $policyDefinitionReferenceIds = $row.policyDefinitionReferenceIds $metadata = $row.metadata if ($isXls) { if ([string]::IsNullOrWhitespace($name) ` -and [string]::IsNullOrWhitespace($displayName) ` -and [string]::IsNullOrWhitespace($exemptionCategory) ` -and [string]::IsNullOrWhitespace($scope) ` -and [string]::IsNullOrWhitespace($policyAssignmentId) ` -and [string]::IsNullOrWhitespace($description) ` -and [string]::IsNullOrWhitespace($assignmentScopeValidation) ` -and [string]::IsNullOrWhitespace($resourceSelectors) ` -and [string]::IsNullOrWhitespace($policyDefinitionReferenceIds) ` -and [string]::IsNullOrWhitespace($metadata)) { #ignore empty lines from CSV # Write-Warning "Ignoring empty line in file" continue } } if ([string]::IsNullOrWhitespace($name)) { Add-ErrorMessage -ErrorInfo $errorInfo -ErrorString "required name missing" -EntryNumber $entryNumber } if ([string]::IsNullOrWhitespace($displayName)) { Add-ErrorMessage -ErrorInfo $errorInfo -ErrorString "required displayName missing" -EntryNumber $entryNumber } if ([string]::IsNullOrWhitespace($exemptionCategory)) { Add-ErrorMessage -ErrorInfo $errorInfo -ErrorString "required exemptionCategory missing" -EntryNumber $entryNumber } else { if ($exemptionCategory -ne "Waiver" -and $exemptionCategory -ne "Mitigated") { Add-ErrorMessage -ErrorInfo $errorInfo -ErrorString "invalid exemptionCategory '$exemptionCategory' (must be 'Waiver' or 'Mitigated')" -EntryNumber $entryNumber } } if ([string]::IsNullOrWhitespace($scope)) { Add-ErrorMessage -ErrorInfo $errorInfo -ErrorString "required scope missing" -EntryNumber $entryNumber } if ([string]::IsNullOrWhitespace($policyAssignmentId)) { Add-ErrorMessage -ErrorInfo $errorInfo -ErrorString "required policyAssignmentId missing" -EntryNumber $entryNumber } if (-not [string]::IsNullOrWhitespace($description)) { if ($description.Length -gt 1024) { Add-ErrorMessage -ErrorInfo $errorInfo -ErrorString "description too long (max 1024 characters)" -EntryNumber $entryNumber } } if ([string]::IsNullOrWhitespace($assignmentScopeValidation)) { $assignmentScopeValidation = "Default" } else { if ($assignmentScopeValidation -ne "Default" -and $assignmentScopeValidation -ne "DoNotValidate") { Add-ErrorMessage -ErrorInfo $errorInfo -ErrorString "invalid assignmentScopeValidation '$assignmentScopeValidation' (must be 'Default' or 'DoNotValidate')" -EntryNumber $entryNumber } } #region Convert complex fields from CSV if ($isXls) { # Convert referenceIds into array (if cell empty, set to empty array) $policyDefinitionReferenceIds = @() $step1 = $row.policyDefinitionReferenceIds if (-not [string]::IsNullOrWhiteSpace($step1)) { $step2 = $step1.Trim() $step3 = $step2 -split "," foreach ($item in $step3) { $step4 = $item.Trim() if ($step4.Length -gt 0) { $policyDefinitionReferenceIds += $step4 } } } # Convert resourceSelectors into array (if cell empty, set to Snull) $resourceSelectors = $null $step1 = $row.resourceSelectors if (-not [string]::IsNullOrWhiteSpace($step1)) { $step2 = $step1.Trim() if ($step2.StartsWith("{") -and (Test-Json $step2)) { $step3 = ConvertFrom-Json $step2 -AsHashTable -Depth 100 if ($step3 -ne @{}) { $resourceSelectors = $step3 } } else { Add-ErrorMessage -ErrorInfo $errorInfo -ErrorString "invalid resourceSelectors format, must be empty or legal JSON: '$step2'" -EntryNumber $entryNumber } } # Convert metadata JSON to object $metadata = $null $step1 = $row.metadata if (-not [string]::IsNullOrWhiteSpace($step1)) { $step2 = $step1.Trim() if ($step2.StartsWith("{") -and (Test-Json $step2)) { $step3 = ConvertFrom-Json $step2 -AsHashTable -Depth 100 if ($step3 -ne @{}) { $metadata = $step3 } } else { Add-ErrorMessage -ErrorInfo $errorInfo -ErrorString "invalid metadata format, must be empty or legal JSON: '$step2'" -EntryNumber $entryNumber } } } $expiresOn = $null $expiresOnRaw = $exemptionRaw.expiresOn if (-not [string]::IsNullOrWhitespace($expiresOnRaw)) { if ($expiresOnRaw -is [datetime]) { $expiresOn = $expiresOnRaw } elseif ($expiresOnRaw -is [string]) { try { $expiresOn = [datetime]::Parse($expiresOnRaw, $null, [System.Globalization.DateTimeStyles]::AssumeUniversal -bor [System.Globalization.DateTimeStyles]::AdjustToUniversal) } catch { Add-ErrorMessage -ErrorInfo $errorInfo -ErrorString $_ -EntryNumber $entryNumber } } else { Add-ErrorMessage -ErrorInfo $errorInfo -ErrorString "invalid expiresOn format, must be empty or a valid date/time: '$expiresOnRaw'" -EntryNumber $entryNumber } } $id = "$scope/providers/Microsoft.Authorization/policyExemptions/$name" if ($allExemptions.ContainsKey($id)) { Add-ErrorMessage -ErrorInfo $errorInfo -ErrorString "duplicate exemption id (name=$name, scope=$scope)" -EntryNumber $entryNumber } else { $allExemptions.Add($id, $true) } if ($errorInfo.hasErrors) { continue } $exemption = [PSCustomObject]@{ name = $name displayName = $displayName description = $description exemptionCategory = $exemptionCategory expiresOn = $expiresOn scope = $scope policyAssignmentId = $policyAssignmentId assignmentScopeValidation = $assignmentScopeValidation resourceSelectors = $resourceSelectors policyDefinitionReferenceIds = $policyDefinitionReferenceIds metadata = $metadata } #region expiresOn $expired = $false $expiresOn = $exemptionRaw.expiresOn if ($null -ne $expiresOn) { $expired = $expiresOn -lt $now $null = $exemption.Add("expiresOn", $expiresOn) } #endregion expiresOn # Filter orphaned and expired Exemptions in definitions; deleteCandidates will delete it from environment if it is still deployed if ($expired) { Write-Warning "Expired exemption (name=$name, scope=$scope) in definitions" continue } if (!$AllAssignments.ContainsKey($policyAssignmentId)) { Write-Warning "Orphaned exemption (name=$name, scope=$scope) in definitions" continue } # Calculate desired state mandated changes if ($deployedManagedExemptions.ContainsKey($id)) { $deleteCandidates.Remove($id) $deployedManagedExemption = $deployedManagedExemptions.$id if ($deployedManagedExemption.policyAssignmentId -ne $policyAssignmentId) { # Replaced Assignment Write-Information "Replace(assignment) '$($name)', '$($scope)'" $null = $Exemptions.replace.Add($id, $exemption) $Exemptions.numberOfChanges++ } elseif ($replacedAssignments.ContainsKey($policyAssignmentId)) { # Replaced Assignment Write-Information "Replace(reference) '$($name)', '$($scope)'" $null = $Exemptions.replace.Add($id, $exemption) $Exemptions.numberOfChanges++ } else { # Maybe update existing Exemption $displayNameMatches = $deployedManagedExemption.displayName -eq $displayName $descriptionMatches = ($deployedManagedExemption.description -eq $description) ` -or ([string]::IsNullOrWhiteSpace($deployedManagedExemption.description) -and [string]::IsNullOrWhiteSpace($description)) $exemptionCategoryMatches = $deployedManagedExemption.exemptionCategory -eq $exemptionCategory $expiresOnMatches = $deployedManagedExemption.expiresOn -eq $expiresOn $clearExpiration = $false if (-not $expiresOnMatches) { if ($null -eq $expiresOn) { $null = $exemption.Add("clearExpiration", $true) $clearExpiration = $true } } $policyDefinitionReferenceIdsMatches = Confirm-ObjectValueEqualityDeep $deployedManagedExemption.policyDefinitionReferenceIds $policyDefinitionReferenceIds $metadataMatches = Confirm-MetadataMatches ` -ExistingMetadataObj $deployedManagedExemption.metadata ` -DefinedMetadataObj $metadata $assignmentScopeValidationMatches = ($deployedManagedExemption.assignmentScopeValidation -eq $assignmentScopeValidation) ` -or ($null -eq $deployedManagedExemption.assignmentScopeValidation -and ($assignmentScopeValidation -eq "Default" -or $null -eq $assignmentScopeValidation)) $resourceSelectorsMatches = Confirm-ObjectValueEqualityDeep $deployedManagedExemption.resourceSelectors $resourceSelectors # Update Exemption in Azure if necessary if ($displayNameMatches -and $descriptionMatches -and $exemptionCategoryMatches -and $expiresOnMatches ` -and $policyDefinitionReferenceIdsMatches -and $metadataMatches -and (-not $clearExpiration) ` -and $assignmentScopeValidationMatches -and $resourceSelectorsMatches) { $Exemptions.numberUnchanged += 1 } else { # One or more properties have changed $changesStrings = @() if (!$displayNameMatches) { $changesStrings += "displayName" } if (!$descriptionMatches) { $changesStrings += "description" } if (!$policyDefinitionReferenceIdsMatches) { $changesStrings += "referenceIds" } if (!$metadataMatches) { $changesStrings += "metadata" } if (!$exemptionCategoryMatches) { $changesStrings += "exemptionCategory" } if ($clearExpiration) { $changesStrings += "clearExpiration" } elseif (!$expiresOnMatches) { $changesStrings += "expiresOn" } if (!$assignmentScopeValidationMatches) { $changesStrings += "assignmentScopeValidation" } if (!$resourceSelectorsMatches) { $changesStrings += "resourceSelectors" } $changesString = $changesStrings -join "," $Exemptions.numberOfChanges++ $null = $Exemptions.update.Add($id, $exemption) Write-Information "Update($changesString) '$($name)', '$($scope)'" } } } else { # Create Exemption Write-Information "New '$($name)', '$($scope)'" $null = $Exemptions.new.Add($id, $exemption) $Exemptions.numberOfChanges++ } } if ($errorInfo.hasErrors) { $errorText = Get-ErrorTextFromInfo -ErrorInfo $errorInfo Write-Error $errorText -ErrorAction Continue $numberOfFilesWithErrors++ continue } } if ($numberOfFilesWithErrors -gt 0) { Write-Error "There were errors in $numberOfFilesWithErrors file(s)." -ErrorAction Stop } $Exemptions.numberOfOrphans = $DeployedExemptions.orphaned.psbase.Count foreach ($exemption in $DeployedExemptions.orphaned.Values) { # delete all orphaned exemptions Write-Warning "Delete(orphaned) '$($exemption.name)', '$($exemption.scope)'" $null = $Exemptions.delete[$exemption.id] = $exemption $Exemptions.numberOfChanges++ } $strategy = $PacEnvironment.desiredState.strategy foreach ($id in $deleteCandidates.Keys) { $exemption = $DeployedExemptions.managed[$id] $pacOwner = $exemption.pacOwner $shallDelete = Confirm-DeleteForStrategy -PacOwner $pacOwner -Strategy $strategy if ($shallDelete) { Write-Information "Delete '$($exemption.name)', '$($exemption.scope)'" $null = $Exemptions.delete[$exemption.id] = $exemption $Exemptions.numberOfChanges++ } else { # Write-Information "No delete($pacOwner,$strategy) '$($exemption.name)', '$($exemption.scope)'" } } Write-Information "" if ($Exemptions.numberUnchanged -gt 0) { Write-Information "$($Exemptions.numberUnchanged) unchanged Exemptions" } if ($Exemptions.numberOfOrphans -gt 0) { Write-Information "$($Exemptions.numberOfOrphans) orphaned Exemptions" } } Write-Information "" } } |