AzSKPreview

4.0.2

Framework/Core/SVT/Services/APIConnection.ps1

Set-StrictMode -Version Latest 
class APIConnectionControl
{
    [string] $Name = ""
    [string] $Automated = ""
    [string] $MethodName = ""
    [string] $Remarks = ""
}
class APIConnectionApprovedConnector
{
    [string] $connectorName = ""
    [APIConnectionControl[]] $ApplicableControls = @()
    [APIConnectionControl[]] $NotApplicableControls = @()
    
}
class APIConnectionNotApprovedConnector
{
    [string] $connectorName = ""
    [string] $Remarks = ""
    
}
class APIConnectionConnectorsMetadata
{
    [APIConnectionApprovedConnector[]] $ApprovedConnectors = @()
    [APIConnectionNotApprovedConnector[]] $notApprovedConnectors = @()    
}

class APIConnection: AzSVTBase
{   
    hidden [PSObject] $LogicAppObject;
    hidden [PSObject] $ResourceObject;
    hidden [APIConnectionConnectorsMetadata] $LogicAppConnectorsMetadata

    APIConnection([string] $subscriptionId, [SVTResource] $svtResource): 
        Base($subscriptionId, $svtResource) 
    { 
        $this.GetResourceObject();
        $this.LogicAppConnectorsMetadata = [APIConnectionConnectorsMetadata] ($this.LoadServerConfigFile("LogicApps.Connectors.json"));
    }

    hidden [PSObject] GetResourceObject()
    {
        $logicAppConnectors = $this.ResourceContext.ResourceName.Split("//")

        if(($logicAppConnectors | Measure-Object).count -eq 2)
        {
            $this.LogicAppObject = Get-AzResource -Name $logicAppConnectors[0] `
                                            -ResourceGroupName $this.ResourceContext.ResourceGroupName -ResourceType 'Microsoft.Logic/Workflows'
        }
        else
        {
            throw ([SuppressedException]::new(("Logic App Connector '{0}' not found under Resource Group '{1}'" -f ($this.ResourceContext.ResourceName), ($this.ResourceContext.ResourceGroupName)), [SuppressedExceptionType]::InvalidOperation))
        }
        if (-not $this.LogicAppObject) 
        {
              throw ([SuppressedException]::new(("LogicApp '{0}' not found under Resource Group '{1}'" -f ($this.ResourceContext.ResourceName), ($this.ResourceContext.ResourceGroupName)), [SuppressedExceptionType]::InvalidOperation))
        }
        else
        {
            $this.ResourceObject = $this.GetConnectorObject()
        }
        return $this.ResourceObject;
    }

    hidden [PSObject] GetConnectorObject()
    {
        if($this.ResourceContext.ResourceId -like "*/custom/*")
        {
            $Definition = $this.LogicAppObject.Properties.definition
            if($null -ne $Definition.Actions -and -not[string]::IsNullOrEmpty($this.LogicAppObject.Properties.definition.actions))
            {
                $connectorFound = ($Definition.Actions | Get-Member -MemberType *Property | Where-Object { $_.name -eq  ($this.ResourceContext.ResourceName.Split("//")[1]) -and ($Definition.Actions.($_.name).type -ne 'ApiConnection') } | Select-Object -First 1)
                if($null -ne $connectorFound)
                {
                        $Name = $connectorFound.name    
                        $Connector = New-Object PSObject
                        Add-Member -InputObject $Connector -MemberType NoteProperty -Name ConnectorName -Value $Name
                        Add-Member -InputObject $Connector -MemberType NoteProperty  -Name ConnectorType -Value $Definition.Actions.$Name.type
                        Add-Member -InputObject $Connector -MemberType NoteProperty  -Name ConnectorObj -Value $Definition.Actions.$Name
                        $this.ResourceObject = $Connector
                }
            }
            if($null -ne $Definition.triggers -and -not[string]::IsNullOrEmpty($this.LogicAppObject.Properties.definition.triggers))
            {
                $connectorFound = ($Definition.Triggers | Get-Member -MemberType *Property | Where-Object { $_.name -eq  ($this.ResourceContext.ResourceName.Split("//")[1]) -and ($Definition.Triggers.($_.name).type -ne 'ApiConnection') } | Select-Object -First 1)
                    if($null -ne $connectorFound)
                    {
                        $Name = $connectorFound.name    
                        $Connector = New-Object PSObject
                        Add-Member -InputObject $Connector -MemberType NoteProperty -Name ConnectorName -Value $Name
                        Add-Member -InputObject $Connector -MemberType NoteProperty  -Name ConnectorType -Value $Definition.Triggers.$Name.type
                        Add-Member -InputObject $Connector -MemberType NoteProperty  -Name ConnectorObj -Value $Definition.Triggers.$Name
                        $this.ResourceObject = $Connector
                    }
            }
        }
        else
        {
            $apiConObj = Get-AzResource -ResourceId $this.ResourceContext.ResourceId
            $apiName=$apiConObj.Properties.Api.Name                           
            
            $Connector = New-Object PSObject
            Add-Member -InputObject $Connector -MemberType NoteProperty -Name ConnectorName -Value $apiName   
            Add-Member -InputObject $Connector -MemberType NoteProperty  -Name ConnectorType -Value $apiName
            Add-Member -InputObject $Connector -MemberType NoteProperty  -Name ConnectorObj -Value $null

            $this.ResourceObject = $Connector
        }
        return $this.ResourceObject;
    }

    hidden [ControlResult] CheckConnectorsAADAuth([ControlResult] $controlResult)
    {
        $controlResult =  $this.GetConnectorsStatus("AAD", $controlResult)
        return $controlResult;
    }
    hidden [ControlResult] CheckConnectorsEncryptionInTransit([ControlResult] $controlResult)
    {
        $controlResult = $this.GetConnectorsStatus("EncryptionTransit", $controlResult)
        return $controlResult;
    }

    #internal functions
    
    hidden [ControlResult] CheckAadAuthForHttp([string] $remarks , [ControlResult] $childControlResult)
    {   
        $isPassed = $false        
        if(Get-Member -inputobject $this.ResourceObject.ConnectorObj.inputs -name "authentication" -Membertype Properties)
        {    
            if([Helpers]::CheckMember($this.ResourceObject.ConnectorObj.inputs.authentication,"type") -and $this.ResourceObject.ConnectorObj.inputs.authentication.type -eq "ActiveDirectoryOAuth")
            {
                $isPassed = $true
            }
        }    
        if($isPassed)    
        {
            $childControlResult.AddMessage([VerificationResult]::Passed,"AAD Authentication is used in connector - "+ $this.ResourceObject.ConnectorName)
        }
        else
        {
            $childControlResult.AddMessage([VerificationResult]::Failed, "AAD Authentication is not used in connector - "+ $this.ResourceObject.ConnectorName)
        }
        return $childControlResult
    }
    
    hidden [ControlResult] CheckEncryptionTransitForHttp([string] $remarks, [ControlResult] $childControlResult)
    {
            $isPassed = $true
            if(([Helpers]::CheckMember($this.ResourceObject.connectorObj.inputs,"uri")))
            {
                $uriString = $this.ResourceObject.ConnectorObj.inputs.uri            
                
                if(([system.Uri]$uriString).Scheme -ne 'https')
                {
                    $isPassed = $false 
                }
                if($isPassed)    
                {
                    $childControlResult.AddMessage([VerificationResult]::Passed,"Connector name : " + $this.ResourceObject.ConnectorName + "`r`nConnector URI : "+ $uriString)
                }
                else
                {
                    $childControlResult.AddMessage([VerificationResult]::Failed, `
                                                    "Must use HTTPS URI for below connector`r`n" `
                                                    + "Connector name : " + $this.ResourceObject.ConnectorName + "`r`nConnector URI : "+$uriString)
                                                    
                }
            }
            return $childControlResult
    }
    
    hidden [ControlResult] CheckEncryptionTransitForWebhook([string] $remarks , [ControlResult] $childControlResult)
    {
        $isPassed = $true            
        $subURI = ""
        $unSubURI = ""
        if(([Helpers]::CheckMember($this.ResourceObject.connectorObj.inputs,"subscribe")) -and ([Helpers]::CheckMember($this.ResourceObject.connectorObj.inputs.subscribe,"uri")))
        {
            $subURI = $this.ResourceObject.connectorObj.inputs.subscribe.uri
        }
        
        if(([Helpers]::CheckMember($this.ResourceObject.connectorObj.inputs,"unsubscribe")) -and ([Helpers]::CheckMember($this.ResourceObject.connectorObj.inputs.unsubscribe,"uri")))
        {
            $unSubURI = $this.ResourceObject.connectorObj.inputs.unsubscribe.uri 
        }

        if(($subURI -ne "" -and ([system.Uri]$subURI).Scheme -ne 'https') -or ($unSubURI -ne "" -and ([system.Uri]$unSubURI).Scheme -ne 'https'))
        {
            $isPassed = $false
        } 
        if($isPassed)    
        {
            $childControlResult.AddMessage([VerificationResult]::Passed, "Connector name : " + $this.ResourceObject.ConnectorName `
                                                                        + "`r`nWebhook subscribe URI : "+ $subURI`
                                                                        + "`r`nWebhook unsubscribe URI : "+$unSubURI)
        }
        else
        {
            $childControlResult.AddMessage([VerificationResult]::Failed, "Must use HTTPS URI(s) for below connector`r`n" `
                                                                        + "Connector name : " + $this.ResourceObject.ConnectorName `
                                                                        + "`r`nWebhook subscribe URI : "+ $subURI`
                                                                        + "`r`nWebhook unsubscribe URI : "+$unSubURI)
        }
        return $childControlResult
    }    
    
    hidden [ControlResult] GetConnectorsStatus([string] $controlName, [ControlResult] $controlResult)
    {
        $connectorName=$this.ResourceObject.ConnectorName                
        $ConnectorObj = $this.ResourceObject.ConnectorObj
        $connectorType=$this.ResourceObject.ConnectorType

        if($connectorName -eq "manual")
        {
            $connectorName = $connectorType
        }                    
                    
        #check if this connector belongs to not approved list
        $notApprovedConnector = $this.LogicAppConnectorsMetadata.NotApprovedConnectors | Where-Object {$_.connectorName -eq $connectorType}
        if($notApprovedConnector)
        {
            $controlResult.AddMessage([VerificationResult]::Failed, $notApprovedConnector.Remarks)
        }
        else
        {
            #Check if it belongs to approved connectors
            $approvedConnector = $this.LogicAppConnectorsMetadata.ApprovedConnectors | Where-Object {$_.connectorName -eq $connectorType} 
            if(($approvedConnector|Measure-Object).Count -gt 0)
            {
                #check if control is applicable on this connector
                $applicableControl = $approvedConnector.ApplicableControls | Where-Object {$_.Name -eq $controlName} 
                $notApplicableControl = $approvedConnector.NotApplicableControls | Where-Object {$_.Name -eq $controlName} 
                if(($applicableControl|Measure-Object).Count -gt 0)
                {
                    #Get method name
                    $methodName = $applicableControl.MethodName 
                    $controlResult = $this.$methodName($applicableControl.Remarks , $controlResult)
                }
                else
                {
                    $methodName = $notApplicableControl.MethodName 
                    if($notApplicableControl.Remarks -eq [string]::Empty)
                    {
                        $notApplicableControl.Remarks = "This control is not applicable on connector type - " + $connectorType 
                     }
                    $controlResult = $this.$methodName($notApplicableControl.Remarks , $controlResult)                            
                }
            }
            else
            {
                $controlResult.AddMessage([VerificationResult]::Manual, $connectorType+" connector is not evaluated yet")
            }
        }        
        return $controlResult            
    }

    hidden [ControlResult] DefaultPassed([string] $remarks,[ControlResult] $childControlResult)
    {
        $childControlResult.AddMessage([VerificationResult]::Passed, $remarks)
        return $childControlResult
    }

    hidden [ControlResult] DefaultManual([string] $remarks,[ControlResult] $childControlResult)
    {
        $childControlResult.AddMessage([VerificationResult]::Manual, $remarks)
        return $childControlResult
    }
}