AzSK

4.1.0

Framework/Core/SVT/Services/APIManagement.ps1

Set-StrictMode -Version Latest 
class APIManagement: AzSVTBase
{   

    hidden [PSObject] $APIMContext = $null;
    hidden [PSObject] $APIMInstance = $null;
    hidden [PSObject] $APIMAPIs = $null;
    hidden [PSObject] $APIMProducts = $null;

    hidden [PSObject] $ResourceObject;

    APIManagement([string] $subscriptionId, [SVTResource] $svtResource): 
        Base($subscriptionId, $svtResource) 
    { 
        $this.GetResourceObject();
    }

     hidden [PSObject] GetResourceObject()
    {
        if (-not $this.ResourceObject) {
            $this.ResourceObject = $this.ResourceContext.ResourceDetails
            if(-not $this.ResourceObject)
            {
                throw ([SuppressedException]::new(("Resource '{0}' not found under Resource Group '{1}'" -f ($this.ResourceContext.ResourceName), ($this.ResourceContext.ResourceGroupName)), [SuppressedExceptionType]::InvalidOperation))
            }
            elseif($this.ResourceObject)
            {
                $this.APIMContext = New-AzApiManagementContext -ResourceGroupName $this.ResourceContext.ResourceGroupName -ServiceName $this.ResourceContext.ResourceName
                $this.APIMInstance = Get-AzApiManagement -ResourceGroupName $this.ResourceContext.ResourceGroupName -Name $this.ResourceContext.ResourceName
                $this.APIMAPIs = Get-AzApiManagementApi -Context $this.APIMContext
                $this.APIMProducts = Get-AzApiManagementProduct -Context $this.APIMContext
            }
        }
        return $this.ResourceObject;
    }
    
    [ControlItem[]] ApplyServiceFilters([ControlItem[]] $controls)
    {
        $result = @();
        if($this.ResourceObject)
        {
            if($controls.Count -eq 0)
            {
                return $controls;
            }

            # Filter controls based on Tier
            if($this.APIMInstance.Sku -eq "Premium")
            {
                $result += $controls | Where-Object {$_.Tags -contains "PremiumSku" }
            }
            elseif($this.APIMInstance.Sku -eq "Standard")
            {
                $result += $controls | Where-Object {$_.Tags -contains "StandardSku" }
            }
            elseif($this.APIMInstance.Sku -eq "Basic")
            {
                $result += $controls | Where-Object {$_.Tags -contains "BasicSku" }
            }
            elseif($this.APIMInstance.Sku -eq "Developer")
            {
                $result += $controls | Where-Object {$_.Tags -contains "DeveloperSku" }
            }

            # Filter controls: API and Products
            if(-not $this.APIMAPIs)
            {
                $result = $result | Where-Object {$_.Tags -notcontains "APIMAPIs" }
            }
            if(-not $this.APIMProducts)
            {
                $result = $result | Where-Object {$_.Tags -notcontains "APIMProducts" }
            }
            
        }
        return $result;
    }

    hidden [ControlResult] CheckAPIMMetricAlert([ControlResult] $controlResult)
    {
        $this.CheckMetricAlertConfiguration($this.ControlSettings.MetricAlert.APIManagement, $controlResult, "");
        return $controlResult;
    }
    hidden [ControlResult] CheckAPIMURLScheme([ControlResult] $controlResult)
    {
        if( $null -ne $this.APIMAPIs)
        {
            $nonCompliantAPIs = $this.APIMAPIs | Where-Object {$_.Protocols.count -gt 1 -or $_.Protocols[0] -ne [Microsoft.Azure.Commands.ApiManagement.ServiceManagement.Models.PsApiManagementSchema]::Https } |`
                                Select-Object ServiceName, ResourceGroupName, Name, ApiId, Protocols, ServiceUrl
            if(($nonCompliantAPIs|Measure-Object).Count -gt 0)
            {
                $controlResult.AddMessage([VerificationResult]::Failed, "Below API(s) are configured to use non-secure HTTP access to the backend via API Management.", $nonCompliantAPIs)
                $controlResult.SetStateData("API(s) using non-secure HTTP access", $nonCompliantAPIs);
            }
            else
            {
                $controlResult.AddMessage([VerificationResult]::Passed,"")
            }
        }
        
        return $controlResult;
    }

    hidden [ControlResult] CheckSecretNamedValues([ControlResult] $controlResult)
    {
        if( $null -ne $this.APIMContext)
        {
            $allNamedValues = @()
            $allNamedValues += Get-AzApiManagementProperty -Context $this.APIMContext 
            if($allNamedValues.count -eq 0)
            {
                $controlResult.AddMessage([VerificationResult]::Passed, "No named values are present in this API Management service.")        
            }
            else
            {
                $nonsecretNamedValues = $allNamedValues | where-object {$_.Secret -eq $false}
                if(($nonsecretNamedValues |Measure-Object).Count -gt 0)
                {
                    $controlResult.AddMessage([VerificationResult]::Verify, "Below named value(s) are not marked as secret, use secret named value if it contains sensitive data.", $nonsecretNamedValues.Id)
                    $controlResult.SetStateData("Unencrypted variable(s)", $nonsecretNamedValues.Id);
                }
                else
                {
                    $controlResult.AddMessage([VerificationResult]::Passed, "")
                }
            }
        }
        return $controlResult;
    }
    
    hidden [ControlResult] CheckRequiresSubscription([ControlResult] $controlResult)
    {
        # Currently, two more subscription scopes: all APIs and a single API are available in the API Management Consumption tier only.
        # We do not recommend All APIs scope because a single key will grant access all APIs within an API Management instance.

        if($null -ne $this.APIMProducts)
        {
            $Product = $this.APIMProducts | Where-Object { ($_.State -eq [Microsoft.Azure.Commands.ApiManagement.ServiceManagement.Models.PsApiManagementProductState]::Published) -and ($_.SubscriptionRequired -eq $false )}
            if(($Product | Measure-Object).Count -gt 0)
            {
                $controlResult.AddMessage([VerificationResult]::Failed, "'Requires Subscription' option is turned OFF for below Products in '$($this.ResourceContext.ResourceName)' API Management instance.", $Product )
                $controlResult.SetStateData("API product(s) open for public access without the requirement of subscriptions", $Product);
            }
            else
            {
                $controlResult.AddMessage([VerificationResult]::Passed,"")
            }
        }
        return $controlResult;
    }

    hidden [ControlResult] CheckRequiresApproval([ControlResult] $controlResult)
    {
        if( $null -ne $this.APIMProducts)
        {
            $Product = $this.APIMProducts | Where-Object { $_.State -eq [Microsoft.Azure.Commands.ApiManagement.ServiceManagement.Models.PsApiManagementProductState]::Published }
            
            if(($null -ne $Product) -and ($Product.ApprovalRequired -contains $false))
            {
                $Product = $Product | Where-Object { $_.ApprovalRequired -eq $false}
                $controlResult.AddMessage([VerificationResult]::Verify, "'Requires Approval' option is turned OFF for below Products in '$($this.ResourceContext.ResourceName)' API Management instance.", $Product)
                $controlResult.SetStateData("API product(s) where subscription attempts are auto-approved", $Product);
            }
            else
            {
                $controlResult.AddMessage([VerificationResult]::Passed,"")
            }
        }
        return $controlResult;
    }

    hidden [ControlResult] CheckManagementAPIDisabled([ControlResult] $controlResult)
    {
        if( $null -ne $this.APIMContext)
        {
            $tenantAccess = Get-AzApiManagementTenantAccess -Context $this.APIMContext
            
            if(($null -ne $tenantAccess) -and ($tenantAccess.Enabled -eq $true))
            {
                $controlResult.AddMessage([VerificationResult]::Failed, "'Enable API Management REST API' option is turned ON.") 
            }
            else
            {
                $controlResult.AddMessage([VerificationResult]::Passed,"")
            }
        }
        return $controlResult;
    }

    hidden [ControlResult] CheckGitHubIsUsedInAPIM([ControlResult] $controlResult)
    {
        if( $null -ne $this.APIMContext)
        {
            $tenantSyncState = Get-AzApiManagementTenantSyncState -Context $this.APIMContext
            
            if(($tenantSyncState.IsGitEnabled -eq $true) -and ($tenantSyncState.CommitId -ne $null))
            {
                $controlResult.AddMessage([VerificationResult]::Verify, "Verify that constant string values, including secrets, across all API configuration and policies are not checked in Git repository.") 
            }
            else
            {
                $controlResult.AddMessage([VerificationResult]::Passed,"")
            }
        }
        return $controlResult;
    }

    hidden [ControlResult] CheckAADIdentityProviderEnabled([ControlResult] $controlResult)
    {
        if( $null -ne $this.APIMContext)
        {
            # Check if registration using 'Username and Password' is enabled
            $IsBasicRegistrationEnabled = $false
            $ResourceAppIdURI = [WebRequestHelper]::GetResourceManagerUrl()            
            $uri=[system.string]::Format($ResourceAppIdURI+"subscriptions/{0}/resourceGroups/{1}/providers/Microsoft.ApiManagement/service/{2}/tenant/settings?api-version=2018-06-01-preview",$this.SubscriptionContext.SubscriptionId,$this.ResourceContext.ResourceGroupName,$this.ResourceContext.ResourceName)
            $json=$null;
            try 
            {
                $json=[WebRequestHelper]::InvokeGetWebRequest($uri);
            } 
            catch
            {
                $json=$null;
            }
            $failMsg = ""
            if($null -ne $json)
            {
                if([Helpers]::CheckMember($json,"settings"))
                {
                    $IsBasicRegistrationEnabled = $json.settings.'CustomPortalSettings.RegistrationEnabled'
                }
                else
                {
                    $failMsg = "Unable to validate control. Please verify from portal that user registration using 'Username and Password' is disabled. To verify, go to APIM service instance -> Settings -> Identities."
                }    
            }
            
            # Check if sign in using external Identity provider is enabled
            $identityProvider = Get-AzApiManagementIdentityProvider -Context $this.APIMContext
            $nonAADIdentityProvider = $identityProvider | Where-Object { $this.ControlSettings.APIManagement.AllowedIdentityProvider -notcontains  $_.Type}
            
            # Consolidate result for attestation drift
            $result = @()
            if(($IsBasicRegistrationEnabled -eq $true) -or (-not [string]::IsNullOrEmpty($failMsg)))
            {
                $result += "Username and Password"
            }
            if(($nonAADIdentityProvider | Measure-Object).Count -gt 0)
            {
                $result += $nonAADIdentityProvider | ForEach-Object {$_.Type}
            }

            if(($result | Measure-Object).Count -gt 0)
            {        
                $controlResult.AddMessage([VerificationResult]::Verify, "$($failMsg)`r`nBelow listed Identity provider(s) are enabled in '$($this.ResourceContext.ResourceName)' API management instance. Enterprise applications using APIM must authenticate developers/applications using Azure Active Directory backed credentials.", $result)
                $controlResult.SetStateData("Sign in option enabled on developer portal other than AAD", $result);
            }
            else
            {
                $controlResult.AddMessage([VerificationResult]::Passed,"")
            }
        }
        return $controlResult;
    }

    hidden [ControlResult] CheckAPIMDeployedInVNet([ControlResult] $controlResult)
    {
        if( $null -ne $this.APIMInstance)
        {
            if($this.APIMInstance.VpnType -eq [Microsoft.Azure.Commands.ApiManagement.Models.PsApiManagementVpnType]::None)
            {
                $controlResult.AddMessage([VerificationResult]::Verify, "'$($this.ResourceContext.ResourceName)' API management instance is not deployed inside a virtual network. Consider hosting APIM within a virtual network for improved isolation.") 
            }
            else
            {
                $controlResult.AddMessage([VerificationResult]::Manual,"'$($this.ResourceContext.ResourceName)' API management instance is deployed in $($this.APIMInstance.VpnType) mode inside a virtual network.")
            }
        }
        return $controlResult;
    }

    hidden [ControlResult] CheckDefaultProductsExist([ControlResult] $controlResult)
    {
        if( $null -ne $this.APIMProducts)
        {
            $Product = $this.APIMProducts | Where-Object { ($_.ProductId -eq 'starter') -or ($_.ProductId -eq 'unlimited') }
            if(($Product | Measure-Object).Count -gt 0)
            {
                $controlResult.AddMessage([VerificationResult]::Failed, "APIM contains sample products. Delete the two sample products: Starter and Unlimited.",$Product) 
                $controlResult.SetStateData("APIM service sample product", $Product);
            }
            else
            {
                $controlResult.AddMessage([VerificationResult]::Passed,"")
            }
        }
        return $controlResult;
    }

    hidden [ControlResult] CheckClientCertAuthDisabled([ControlResult] $controlResult)
    {
        if(($null -ne $this.APIMContext) -and ($null -ne $this.APIMAPIs))
        {
            $ClientCertAuthDisabledInAPIs = ($this.APIMAPIs).ApiId | ForEach-Object {
                $apiPolicy = Get-AzApiManagementPolicy -Context $this.APIMContext -ApiId $_
                $certThumbprint = $apiPolicy | Select-Xml -XPath "//inbound//authentication-certificate" | foreach { $_.Node.thumbprint }
                if($certThumbprint -eq $null)
                {
                    $_
                }
            }

            if($null -ne $ClientCertAuthDisabledInAPIs)
            {
                $controlResult.AddMessage([VerificationResult]::Failed, "Gateway authentication using client certificate is not enabled in below APIs.", $ClientCertAuthDisabledInAPIs) 
                $controlResult.SetStateData("Gateway authentication using client certificate is not enabled in APIs", $ClientCertAuthDisabledInAPIs);
            }
            else
            {
                $controlResult.AddMessage([VerificationResult]::Passed,"")
            }
        }
        return $controlResult;
    }

    hidden [ControlResult] CheckAPIManagementCORSAllowed([ControlResult] $controlResult)
    {
        if(($null -ne $this.APIMContext) -and ($null -ne $this.APIMAPIs))
        {
            $Result = @()
            $MaxApiCount = 10
            $SleepTime = 30
            if([Helpers]::CheckMember($this.ControlSettings,"SleepTime"))
            {
                $SleepTime = $this.ControlSettings.SleepTime
            }
            if([Helpers]::CheckMember($this.ControlSettings,"MaxApiCount"))
            {
                $MaxApiCount = $this.ControlSettings.MaxApiCount
            }
            $Counter = 0
            $this.APIMAPIs | Select-Object ApiId, Name | ForEach-Object {
                #Policy Scope: API
            
                if($Counter -ge $MaxApiCount)
                {
                sleep($SleepTime)
                $Counter = 0
                }
                $Counter ++
                $APIPolicy = Get-AzApiManagementPolicy -Context $this.APIMContext -ApiId $_.ApiId
                $AllowedOrigins = ""
                $AllowedOrigins = $APIPolicy | Select-Xml -XPath "//inbound//cors//origin" | foreach { $_.Node.InnerXML }
                if($null -ne $AllowedOrigins)
                {
                    $Policy = "" | Select-Object Scope, Name, Id, AllowedOrigins
                    $Policy.Scope = "API"
                    $Policy.Name = $_.Name
                    $Policy.Id = $_.ApiId
                    $Policy.AllowedOrigins = $($AllowedOrigins -join ",")

                    $Result += $Policy
                }
                
                #Policy Scope: Operation
                Get-AzApiManagementOperation -Context $this.APIMContext -ApiId $_.ApiId | ForEach-Object {
                    $OperationPolicy = Get-AzApiManagementPolicy -Context $this.APIMContext -ApiId $_.ApiId -OperationId $_.OperationId
                    $AllowedOrigins = ""
                    $AllowedOrigins = $OperationPolicy | Select-Xml -XPath "//inbound//cors//origin" | foreach { $_.Node.InnerXML }
                    if($null -ne $AllowedOrigins)
                    {
                        $Policy = "" | Select-Object Scope, ScopeName, ScopeId, AllowedOrigins
                        $Policy.Scope = "Operation"
                        $Policy.ScopeName = $_.Name
                        $Policy.ScopeId = $_.OperationId
                        $Policy.AllowedOrigins = $($AllowedOrigins -join ",")

                        $Result += $Policy
                    }
                }
            }

            $FailedResult = $Result | Where-Object { $_.AllowedOrigins.Split(",") -contains "*" }

            if(($FailedResult | Measure-Object).Count -gt 0)
            {
                $controlResult.AddMessage([VerificationResult]::Failed  , 
                                      [MessageData]::new("CORS is enabled in APIM with access from all domains ('*') " + $this.ResourceContext.ResourceName, $FailedResult));
                $controlResult.SetStateData("CORS setting Allowed Origins", $FailedResult);
            }
            elseif(($Result | Measure-Object).Count -gt 0)
            {
                $controlResult.AddMessage([VerificationResult]::Verify,
                    [MessageData]::new("CORS is enabled in APIM with access from below custom domains."),$Result);
                $controlResult.SetStateData("CORS setting Allowed Origins",$Result);
            }
            else
            {
                $controlResult.AddMessage([VerificationResult]::Manual,
                                      [MessageData]::new("No CORS settings found for "+$this.ResourceContext.ResourceName));
            }
        }
        return $controlResult;
    }

    hidden [ControlResult] CheckRestrictedCallerIPs([ControlResult] $controlResult)
    {
        if( $null -ne $this.APIMContext)
        {
            $Result = @()
            #Policy Scope: Gobal
            $GlobalPolicy = Get-AzApiManagementPolicy -Context $this.APIMContext
            $RestrictedIPs = ""
            $RestrictedIPs = $GlobalPolicy | Select-Xml -XPath "//inbound//ip-filter" | foreach { $_.Node }
            $Policy = "" | Select Scope, ScopeName, ScopeId, Action, AddressRange, Status
            $Policy.Scope = "Global"
            $Policy.ScopeName = "NA"
            $Policy.ScopeId = "NA"
            $Policy.Action = ""
            $Policy.AddressRange = ""
            if($null -ne $RestrictedIPs)
            {
                $Policy.Action = $RestrictedIPs.Action
                $Policy.AddressRange = $RestrictedIPs | Select-Object Address, Address-Range
                $Policy.Status = 'Enabled'
            }
            else
            {
                $Policy.Status = 'Not Enabled'
            }
            $Result += $Policy
            #Policy Scope: Product
            if($null -ne $this.APIMProducts)
            {
                $this.APIMProducts | ForEach-Object {
                $ProductPolicy = Get-AzApiManagementPolicy -Context $this.APIMContext -ProductId $_.ProductId
                $RestrictedIPs = ""
                $RestrictedIPs = $ProductPolicy | Select-Xml -XPath "//inbound//ip-filter" | foreach { $_.Node }
                
                $Policy = "" | Select Scope, ScopeName, ScopeId, Action, AddressRange, Status
                $Policy.Scope = "Product"
                $Policy.ScopeName = $_.Title
                $Policy.ScopeId = $_.ProductId
                $Policy.Action = ""
                $Policy.AddressRange = ""
                if($null -ne $RestrictedIPs)
                {
                    $Policy.Action = $RestrictedIPs.Action
                    $Policy.AddressRange = $RestrictedIPs | Select-Object Address, Address-Range
                    $Policy.Status = 'Enabled'
                }
                else
                {
                    $Policy.Status = 'Not Enabled'
                }
                $Result += $Policy
            }
            }
            #Policy Scope: API
            #Policy Scope: Operation
            $MaxApiCount = 10
            $SleepTime = 30
            if([Helpers]::CheckMember($this.ControlSettings,"SleepTime"))
            {
                $SleepTime = $this.ControlSettings.SleepTime
            }
            if([Helpers]::CheckMember($this.ControlSettings,"MaxApiCount"))
            {
                $MaxApiCount = $this.ControlSettings.MaxApiCount
            }
            $Counter = 0
            if($null -ne $this.APIMAPIs)
            {
                $this.APIMAPIs | Select-Object ApiId, Name | ForEach-Object {
                    #Policy Scope: API
                    if($Counter -ge $MaxApiCount)
                    {
                        sleep($SleepTime)
                        $Counter = 0
                    }
                    $Counter ++
                    $APIPolicy = Get-AzApiManagementPolicy -Context $this.APIMContext -ApiId $_.ApiId
                    $RestrictedIPs = ""
                    $RestrictedIPs = $APIPolicy | Select-Xml -XPath "//inbound//ip-filter" | foreach { $_.Node }
                    $Policy = "" | Select Scope, ScopeName, ScopeId, Action, AddressRange, Status
                    $Policy.Scope = "API"
                    $Policy.ScopeName = $_.Name
                    $Policy.ScopeId = $_.ApiId
                    $Policy.Action = ""
                    $Policy.AddressRange = ""
                    if($null -ne $RestrictedIPs)
                    {
                        $Policy.Action = $RestrictedIPs.Action
                        $Policy.AddressRange = $RestrictedIPs | Select-Object Address, Address-Range
                        $Policy.Status = 'Enabled'
                    }
                    else
                    {
                        $Policy.Status = 'Not Enabled'
                    }
                    $Result += $Policy
                    
                    #Policy Scope: Operation
                    Get-AzApiManagementOperation -Context $this.APIMContext -ApiId $_.ApiId | ForEach-Object {
                        $OperationPolicy = Get-AzApiManagementPolicy -Context $this.APIMContext -ApiId $_.ApiId -OperationId $_.OperationId
                        $RestrictedIPs = ""
                        $RestrictedIPs = $APIPolicy | Select-Xml -XPath "//inbound//ip-filter" | foreach { $_.Node }
                        $Policy = "" | Select Scope, ScopeName, ScopeId, Action, AddressRange, Status
                        $Policy.Scope = "Operation"
                        $Policy.ScopeName = $_.Name
                        $Policy.ScopeId = $_.OperationId
                        $Policy.Action = ""
                        $Policy.AddressRange = ""
                        if($null -ne $RestrictedIPs)
                        {
                            $Policy.Action = $RestrictedIPs.Action
                            $Policy.AddressRange = $RestrictedIPs | Select-Object Address, Address-Range
                            $Policy.Status = 'Enabled'
                        }
                        else
                        {
                            $Policy.Status = 'Not Enabled'
                        }
                        $Result += $Policy
                    }
                }
            }

            #Fail control if universal address range 0.0.0.0-255.255.255.255 is used
            $anyToAnyIPFilter = @()
            $allowedIPRange = $Result | Where-Object { $_.Action -eq 'Allow' }
            if(($allowedIPRange | Measure-Object).Count -gt 0)
            {
                $anyToAnyIPFilter = $allowedIPRange | ForEach-Object {
                    $AddressRange = $_.AddressRange[0].'address-range' | Where-Object { 
                        if(($_ | Measure-Object).Count -gt 0)
                        {
                            (($_.from -eq $this.ControlSettings.IPRangeStartIP -and $_.to -eq $this.ControlSettings.IPRangeEndIP) -or `
                            ($_.from -eq $this.ControlSettings.IPRangeEndIP -and $_.to -eq $this.ControlSettings.IPRangeStartIP))
                        }
                    }; 
                    if($AddressRange)
                    {
                        return $_
                    }
                }
            }

            if(($anyToAnyIPFilter | Measure-Object).Count -gt 0)
            {
                $controlResult.AddMessage([VerificationResult]::Failed, "Below IP restriction(s) are configured in $($this.ResourceContext.ResourceName) API management instance.", $anyToAnyIPFilter)
                $controlResult.SetStateData("Restricted caller IPs",$anyToAnyIPFilter);
            }
            elseif(($Result | Measure-Object).Count -gt 0)
            {
                $controlResult.AddMessage([VerificationResult]::Verify, "Below IP restriction(s) are configured in $($this.ResourceContext.ResourceName) API management instance.", $Result)
                $controlResult.SetStateData("Restricted caller IPs",$Result);
            }
            else
            {
                $controlResult.AddMessage([VerificationResult]::Verify,"Unable to validate control. Please verify from portal that IP restirction is enabled for APIs.")
            }
        }    
        return $controlResult;
    }

    hidden [ControlResult] CheckApplicationInsightsEnabled([ControlResult] $controlResult)
    {
        if( $null -ne $this.APIMContext)
        {
            $apimLogger = Get-AzApiManagementLogger -Context $this.APIMContext | Where-Object { $_.Type -eq [Microsoft.Azure.Commands.ApiManagement.ServiceManagement.Models.PsApiManagementLoggerType]::ApplicationInsights }
            
            if($null -ne $apimLogger)
            {
                $controlResult.AddMessage([VerificationResult]::Verify, "Application Insights logger is enabled for" + $this.ResourceContext.ResourceName, $apimLogger) 
                $controlResult.SetStateData("APIs using Application Insights for logging",$apimLogger);
            }
            else
            {
                $controlResult.AddMessage([VerificationResult]::Passed,"")
            }
        }
        return $controlResult;
    }

    hidden [ControlResult] CheckGuestGroupUsedInProduct([ControlResult] $controlResult)
    {
        if(($null -ne $this.APIMContext) -and ($null -ne $this.APIMProducts))
        {
            $GuestGroupUsedInProductList = $this.APIMProducts | ForEach-Object {
                if((Get-AzApiManagementGroup -Context $this.APIMContext -ProductId $_.ProductId).GroupId -contains 'guests')
                {
                    $_
                }
            }

            if($null -ne $GuestGroupUsedInProductList)
            {
                $controlResult.AddMessage([VerificationResult]::Verify, "Guest groups is added to below products access control.", $GuestGroupUsedInProductList) 
                $controlResult.SetStateData("Products open to Guest users",$GuestGroupUsedInProductList);
            }
            else
            {
                $controlResult.AddMessage([VerificationResult]::Passed,"")
            }
        }    
        return $controlResult;
    }

    hidden [ControlResult] CheckDelegatedAuthNEnabled([ControlResult] $controlResult)
    {
        $ResourceAppIdURI = [WebRequestHelper]::GetResourceManagerUrl()            
        $uri=[system.string]::Format($ResourceAppIdURI+"subscriptions/{0}/resourceGroups/{1}/providers/Microsoft.ApiManagement/service/{2}/portalsettings/delegation?api-version=2018-06-01-preview",$this.SubscriptionContext.SubscriptionId,$this.ResourceContext.ResourceGroupName,$this.ResourceContext.ResourceName)
        $json=$null;
        try 
        {
            $json=[WebRequestHelper]::InvokeGetWebRequest($uri);
        } 
        catch
        { 
            $json=$null;
        }
        if(($null -ne $json) -and (($json | Measure-Object).Count -gt 0))
        {
            if(([Helpers]::CheckMember($json[0],"properties")) -and (($json[0].properties.subscriptions.enabled -eq $true) -or ($json[0].properties.userRegistration.enabled -eq $true)))
            {
                $controlResult.AddMessage([VerificationResult]::Verify,
                                         [MessageData]::new("Delegated authentication is enabled for $($this.ResourceContext.ResourceName). Please ensure that it is implemented securely."));
            }
            else
            {
              $controlResult.AddMessage([VerificationResult]::Passed,
                                     [MessageData]::new("Your APIM instance is not using Delegated authentication. It is specifically turned Off."));
            }
        }
        else
        {
           $controlResult.AddMessage([VerificationResult]::Verify,
                                 [MessageData]::new("Unable to validate control. Please verify from portal if the Delegated authentication is On, then it is implemented securely."));
        }
        return $controlResult;
    }

    hidden [ControlResult] CheckAPIManagementMsiEnabled([ControlResult] $controlResult)
    {
        if($null -ne $this.APIMInstance)
        {
            if(([Helpers]::CheckMember($this.APIMInstance.Identity,"Type",$false)) -and ($this.APIMInstance.Identity.type -eq [Microsoft.Azure.Commands.ApiManagement.Models.PsApiManagementServiceIdentityType]::SystemAssigned))
            {
                $controlResult.AddMessage([VerificationResult]::Passed,
                                             [MessageData]::new("Your APIM instance is using Managed Service Identity(MSI). It is specifically turned On."));
            }
            else
            {
                $controlResult.AddMessage([VerificationResult]::Failed,
                                             [MessageData]::new("Your APIM instance is not using Managed Service Identity(MSI). It is specifically turned Off."));
            }
        }    
        return $controlResult;
    }
    
    hidden [ControlResult] CheckUserAuthorizationSettingInAPI([ControlResult] $controlResult)
    {       
        $APIUserAuth = $this.CheckUserAuthorizationSettingEnabledinAPI();
        if(($APIUserAuth.Disabled | Measure-Object).Count -gt 0)
        {
            $controlResult.AddMessage([VerificationResult]::Failed, "User Authorization : OAuth 2.0 or OpenID connect is not enabled in below APIs.", $APIUserAuth.Disabled)
            $controlResult.SetStateData("User Authorization not enabled in APIs",$APIUserAuth.Disabled);
        }
        else
        {
            $controlResult.AddMessage([VerificationResult]::Passed,"")
        }
        return $controlResult;
    }

    hidden [ControlResult] CheckJWTValidatePolicyInAPI([ControlResult] $controlResult)
    {       
        $APIUserAuth = $this.CheckUserAuthorizationSettingEnabledinAPI();
        $JWTValidatePolicyNotFound = @()
        if(($APIUserAuth -ne 'ResourceNotFound') -and ($null -ne $this.APIMContext) -and ($null -ne $this.APIMAPIs))
        {
            $JWTValidatePolicyNotFound =  $this.APIMAPIs | ForEach-Object {        
                $apiPolicy = Get-AzApiManagementPolicy -Context $this.APIMContext -ApiId $_.ApiId
                $IsPolicyEnabled = $apiPolicy | Select-Xml -XPath "//inbound//validate-jwt"
                if($null -eq $IsPolicyEnabled)
                {
                    $_
                }
            }
            $Temp = @()
            if(($JWTValidatePolicyNotFound | Measure-Object).Count -gt 0 -and ($APIUserAuth.Enabled | Measure-Object).Count -gt 0)
            {
                $Temp = Compare-Object -ReferenceObject $APIUserAuth.Enabled.ApiID -DifferenceObject $JWTValidatePolicyNotFound.ApiId -IncludeEqual | Where-Object { $_.SideIndicator -eq "==" }
            }
            if(($JWTValidatePolicyNotFound | Measure-Object).Count -gt 0 -and ($APIUserAuth.Enabled | Measure-Object).Count -gt 0 -and ($Temp | Measure-Object).Count -gt 0)
            {
                $controlResult.AddMessage([VerificationResult]::Failed, "JWT Token validation not found for OAuth/OpenID connect authorization.", $Temp)
                $controlResult.SetStateData("JWT Token validation not found",$Temp);
            }
            elseif(($JWTValidatePolicyNotFound| Measure-Object).Count -gt 0)
            {
                $controlResult.AddMessage([VerificationResult]::Verify,"The 'validate-jwt' policy is not configured in below APIs.", $JWTValidatePolicyNotFound)
                $controlResult.SetStateData("JWT Token validation not found",$JWTValidatePolicyNotFound);
            }
            else
            {
                $controlResult.AddMessage([VerificationResult]::Passed,"")
            }
        }
        return $controlResult;
    }

    hidden [PSObject] CheckUserAuthorizationSettingEnabledinAPI()
    {
        if( $null -ne $this.APIMContext -and ($null -ne $this.APIMAPIs))
        {
            $ResourceAppIdURI = [WebRequestHelper]::GetResourceManagerUrl()
            $APIUserAuth = "" | Select-Object Enabled, Disabled
            $APIUserAuth.Enabled = @()
            $APIUserAuth.Disabled = @()
            $this.APIMAPIs | ForEach-Object {
                $uri=[system.string]::Format($ResourceAppIdURI+"subscriptions/{0}/resourceGroups/{1}/providers/Microsoft.ApiManagement/service/{2}/apis/{3}?api-version=2018-06-01-preview",$this.SubscriptionContext.SubscriptionId,$this.ResourceContext.ResourceGroupName,$this.ResourceContext.ResourceName,$_.ApiId)
                $json=$null;
                try 
                {     
                    $json=[WebRequestHelper]::InvokeGetWebRequest($uri);
                } 
                catch
                { 
                    $json=$null;
                }
                if(($null -ne $json) -and (($json | Measure-Object).Count -gt 0))
                {
                    if(([Helpers]::CheckMember($json[0],"properties.authenticationSettings")) -and ([Helpers]::CheckMember($json, "properties.authenticationSettings.oAuth2") -or [Helpers]::CheckMember($json, "properties.authenticationSettings.openid")))
                    {
                        $APIUserAuth.Enabled += $_
                    }
                    else
                    {
                        $APIUserAuth.Disabled += $_
                    }
                }
            }
            return $APIUserAuth;
        }
        else
        {
            return "ResourceNotFound";
        }
    }

}