AzSK

3.4.0

Framework/Abstracts/SVTCommandBase.ps1

using namespace System.Management.Automation
Set-StrictMode -Version Latest
# Base class for SVT classes being called from PS commands
# Provides functionality to fire important events at command call
class SVTCommandBase: CommandBase {
    [string[]] $ExcludeTags = @();
    [string[]] $ControlIds = @();
    [string] $ControlIdString = "";
    [bool] $UsePartialCommits;
    [bool] $UseBaselineControls;
    [string] $PartialScanIdentifier = [string]::Empty;
    hidden [ControlStateExtension] $ControlStateExt;
    hidden [bool] $UserHasStateAccess = $false;
    [bool] $GenerateFixScript = $false;
    [bool] $IncludeUserComments = $false;
    [AttestationOptions] $AttestationOptions;
    hidden [ComplianceReportHelper] $ComplianceReportHelper = $null;
    hidden [ComplianceBase] $ComplianceBase = $null;
    hidden [string] $AttestationUniqueRunId;
    

    SVTCommandBase([string] $subscriptionId, [InvocationInfo] $invocationContext):
    Base($subscriptionId, $invocationContext) {
        [Helpers]::AbstractClass($this, [SVTCommandBase]);
        $this.CheckAndDisableAzureRMTelemetry()
        $this.AttestationUniqueRunId = $(Get-Date -format "yyyyMMdd_HHmmss");
        #Fetching the resourceInventory once for each SVT command execution
        [ResourceInventory]::Clear();
    }

    hidden [SVTEventContext] CreateSVTEventContextObject() {
        return [SVTEventContext]@{
            SubscriptionContext = $this.SubscriptionContext;
            PartialScanIdentifier = $this.PartialScanIdentifier
        };
    }

    hidden [void] CommandStarted() {
        [SVTEventContext] $arg = $this.CreateSVTEventContextObject();
        $versionMessage = $this.CheckModuleVersion();
        if ($versionMessage) {
            $arg.Messages += $versionMessage;
        }

        if ($null -ne $this.AttestationOptions -and $this.AttestationOptions.AttestControls -eq [AttestControls]::NotAttested -and $this.AttestationOptions.IsBulkClearModeOn) {
            throw [SuppressedException] ("The 'BulkClear' option does not apply to 'NotAttested' controls.`n")
        }
        #check to limit multi controlids in the bulk attestation mode
        $ctrlIds = $this.ConvertToStringArray($this.ControlIdString);
        if ($null -ne $this.AttestationOptions -and (-not [string]::IsNullOrWhiteSpace($this.AttestationOptions.JustificationText) -or $this.AttestationOptions.IsBulkClearModeOn) -and ($ctrlIds.Count -gt 1 -or $this.UseBaselineControls)) {
            if($this.UseBaselineControls)
            {
                throw [SuppressedException] ("UseBaselineControls flag should not be passed in case of Bulk attestation. This results in multiple controls. `nBulk attestation mode supports only one controlId at a time.`n")
            }
            else
            {
                throw [SuppressedException] ("Multiple controlIds specified. `nBulk attestation mode supports only one controlId at a time.`n")
            }            
        }
        
        #check and delete if older RG found. Remove this code post 8/15/2018 release
        $this.RemoveOldAzSDKRG();
        #Create necessary resources to save compliance data in user's subscription
        if($this.IsLocalComplianceStoreEnabled)
        {
            $this.ComplianceReportHelper = [ComplianceReportHelper]::new($this.SubscriptionContext, $this.GetCurrentModuleVersion());  
            if(-not $this.ComplianceReportHelper.HaveRequiredPermissions())
            {
                $this.IsLocalComplianceStoreEnabled = $false;
            }
        }
        $this.PublishEvent([SVTEvent]::CommandStarted, $arg);
    }

    [void] PostCommandStartedAction()
    {
        
    }

    hidden [void] CommandError([System.Management.Automation.ErrorRecord] $exception) {
        [SVTEventContext] $arg = $this.CreateSVTEventContextObject();
        $arg.ExceptionMessage = $exception;

        $this.PublishEvent([SVTEvent]::CommandError, $arg);
        $this.CheckAndEnableAzureRMTelemetry()
    }

    hidden [void] CommandCompleted([SVTEventContext[]] $arguments) {
        $this.PublishEvent([SVTEvent]::CommandCompleted, $arguments);
        $this.CheckAndEnableAzureRMTelemetry()
    }

    [string] EvaluateControlStatus() {
        return ([CommandBase]$this).InvokeFunction($this.RunAllControls);
    }

    # Dummy function declaration to define the function signature
    # Function is supposed to override in derived class
    hidden [SVTEventContext[]] RunAllControls() {
        return @();
    }

    hidden [void] SetSVTBaseProperties([PSObject] $svtObject) {
        $svtObject.FilterTags = $this.ConvertToStringArray($this.FilterTags);
        $svtObject.ExcludeTags = $this.ConvertToStringArray($this.ExcludeTags);
        $svtObject.ControlIds += $this.ControlIds;
        $svtObject.ControlIds += $this.ConvertToStringArray($this.ControlIdString);
        $svtObject.GenerateFixScript = $this.GenerateFixScript;
        # ToDo: remove InvocationContext, try to pass as param
        # ToDo: Assumption: usercomment will only work when storage report feature flag is enable
        $resourceId = $svtObject.GetResourceId(); 
        $svtObject.ComplianceStateData = $this.FetchComplianceStateData($resourceId);

        #Include Server Side Exclude Tags
        $svtObject.ExcludeTags += [ConfigurationManager]::GetAzSKConfigData().DefaultControlExculdeTags

        #Include Server Side Filter Tags
        $svtObject.FilterTags += [ConfigurationManager]::GetAzSKConfigData().DefaultControlFiltersTags

        #Set Partial Unique Identifier
        if($svtObject.ResourceContext)
        {
            $svtObject.PartialScanIdentifier =$this.PartialScanIdentifier
        }
        
        # ToDo: Utilize exiting functions
        $this.InitializeControlState();
        $svtObject.ControlStateExt = $this.ControlStateExt;
    }

    hidden [ComplianceStateTableEntity[]] FetchComplianceStateData([string] $resourceId)
    {
        [ComplianceStateTableEntity[]] $ComplianceStateData = @();
        if($this.IsLocalComplianceStoreEnabled)
        {
            if($null -ne $this.ComplianceReportHelper)
            {
                [string[]] $partitionKeys = @();                
                $partitionKey = [Helpers]::ComputeHash($resourceId.ToLower());                
                $partitionKeys += $partitionKey
                $ComplianceStateData = $this.ComplianceReportHelper.GetSubscriptionComplianceReport($partitionKeys);            
            }
        }
        return $ComplianceStateData;
    }

    hidden [void] InitializeControlState() {
        if (-not $this.ControlStateExt) {
            $this.ControlStateExt = [ControlStateExtension]::new($this.SubscriptionContext, $this.InvocationContext);
            $this.ControlStateExt.UniqueRunId = $this.AttestationUniqueRunId
            $this.ControlStateExt.Initialize($false);
            $this.UserHasStateAccess = $this.ControlStateExt.HasControlStateReadAccessPermissions();
        }
    }

    [void] PostCommandCompletedAction([SVTEventContext[]] $arguments) {
        if ($this.AttestationOptions -ne $null -and $this.AttestationOptions.AttestControls -ne [AttestControls]::None) {
            try {
                [SVTControlAttestation] $svtControlAttestation = [SVTControlAttestation]::new($arguments, $this.AttestationOptions, $this.SubscriptionContext, $this.InvocationContext);
                #The current context user would be able to read the storage blob only if he has minimum of contributor access.
                if ($svtControlAttestation.controlStateExtension.HasControlStateReadAccessPermissions()) {
                    if (-not [string]::IsNullOrWhiteSpace($this.AttestationOptions.JustificationText) -or $this.AttestationOptions.IsBulkClearModeOn) {
                        $this.PublishCustomMessage([Constants]::HashLine + "`n`nStarting Control Attestation workflow in bulk mode...`n`n");
                    }
                    else {
                        $this.PublishCustomMessage([Constants]::HashLine + "`n`nStarting Control Attestation workflow...`n`n");
                    }
                    [MessageData] $data = [MessageData]@{
                        Message     = ([Constants]::SingleDashLine + "`nWarning: `nPlease use utmost discretion when attesting controls. In particular, when choosing to not fix a failing control, you are taking accountability that nothing will go wrong even though security is not correctly/fully configured. `nAlso, please ensure that you provide an apt justification for each attested control to capture the rationale behind your decision.`n");
                        MessageType = [MessageType]::Warning;
                    };
                    $this.PublishCustomMessage($data)
                    $response = ""
                    while ($response.Trim() -ne "y" -and $response.Trim() -ne "n") {
                        if (-not [string]::IsNullOrEmpty($response)) {
                            Write-Host "Please select appropriate option."
                        }
                        $response = Read-Host "Do you want to continue (Y/N)"
                    }
                    if ($response.Trim() -eq "y") {
                        $svtControlAttestation.StartControlAttestation();
                    }
                    else {
                        $this.PublishCustomMessage("Exiting the control attestation process.")
                    }
                }
                else {
                    [MessageData] $data = [MessageData]@{
                        Message     = "You don't have the required permissions to perform control attestation. If you'd like to perform control attestation, please request your subscription owner to grant you 'Contributor' access to the 'AzSKRG' resource group.";
                        MessageType = [MessageType]::Error;
                    };
                    $this.PublishCustomMessage($data)
                }
            }
            catch {
                $this.CommandError($_);
            }
        }
    }

    hidden [void] CheckAndDisableAzureRMTelemetry()
    {
        #Disable AzureRM telemetry setting until scan is completed.
        #This has been added to improve the performarnce of scan commands
        #Telemetry will be re-enabled once scan is completed
        $dataCollectionPath = "$env:APPDATA\Windows Azure Powershell\AzurePSDataCollectionProfile.json"
        if(Test-Path -Path $dataCollectionPath)
        {
            $dataCollectionProfile = Get-Content -path $dataCollectionPath | ConvertFrom-Json
            if($dataCollectionProfile.enableAzureDataCollection)
            {    
                #Keep settings in
                $AzureRMDataCollectionSettingFolderpath= [Constants]::AzSKAppFolderPath + "\AzureRMDataCollectionSettings"
                if(-not (Test-Path -Path $AzureRMDataCollectionSettingFolderpath))
                {
                    mkdir -Path $AzureRMDataCollectionSettingFolderpath -Force
                }
                
                $AzureRMDataCollectionFilePath = $AzureRMDataCollectionSettingFolderpath + "\AzurePSDataCollectionProfile.json"
                if(-not (Test-Path -Path $AzureRMDataCollectionFilePath))
                {
                    Copy-Item $dataCollectionPath $AzureRMDataCollectionFilePath                    
                }
                Disable-AzureRmDataCollection  | Out-Null
            }
        }
    }
    
    hidden [void] CheckAndEnableAzureRMTelemetry()
    {
        #Enabled AzureRM telemetry which got disabled at the start of command
        $AzureRMDataCollectionSettingFilepath= [Constants]::AzSKAppFolderPath + "\AzureRMDataCollectionSettings\AzurePSDataCollectionProfile.json"
        if(Test-Path -Path $AzureRMDataCollectionSettingFilepath)
        {
            $dataCollectionProfile = Get-Content -path $AzureRMDataCollectionSettingFilepath | ConvertFrom-Json
            if($dataCollectionProfile -and $dataCollectionProfile.enableAzureDataCollection)
            {
                Enable-AzureRmDataCollection  | Out-Null
            }
        }

    }

    hidden [void] RemoveOldAzSDKRG()
    {
        $scanSource = [AzSKSettings]::GetInstance().GetScanSource();
        if($scanSource -eq "SDL" -or [string]::IsNullOrWhiteSpace($scanSource))
        {
            $olderRG = Get-AzureRmResourceGroup -Name $([OldConstants]::AzSDKRGName) -ErrorAction SilentlyContinue
            if($null -ne $olderRG)
            {
                $resources = Find-AzureRmResource -ResourceGroupNameEquals $([OldConstants]::AzSDKRGName)
                try {
                    $azsdkRGScope = "/subscriptions/$($this.SubscriptionContext.SubscriptionId)/resourceGroups/$([OldConstants]::AzSDKRGName)"
                    $resourceLocks = @();
                    $resourceLocks += Get-AzureRmResourceLock -Scope $azsdkRGScope -ErrorAction Stop
                    if($resourceLocks.Count -gt 0)
                    {
                        $resourceLocks | ForEach-Object {
                            Remove-AzureRmResourceLock -LockId $_.LockId -Force -ErrorAction Stop
                        }                 
                    }

                    if(($resources | Measure-Object).Count -gt 0)
                    {
                        $otherResources = $resources | Where-Object { -not ($_.ResourceName -like "$([OldConstants]::StorageAccountPreName)*")} 
                        if(($otherResources | Measure-Object).Count -gt 0)
                        {
                            Write-Host "WARNING: Found non DevOps Kit resources under older RG [$([OldConstants]::AzSDKRGName)] as shown below:" -ForegroundColor Yellow
                            $otherResources
                            Write-Host "We are about to delete the older resource group including all the resources inside." -ForegroundColor Yellow
                            $option = Read-Host "Do you want to continue (Y/N) ?";
                            $option = $option.Trim();
                            While($option -ne "y" -and $option -ne "n")
                            {
                                Write-Host "Provide correct option (Y/N)."
                                $option = Read-Host "Do you want to continue (Y/N) ?";
                                $option = $option.Trim();
                            }
                            if($option -eq "y")
                            {
                                Remove-AzureRmResourceGroup -Name $([OldConstants]::AzSDKRGName) -Force -AsJob
                            }
                        }
                        else
                        {
                            Remove-AzureRmResourceGroup -Name $([OldConstants]::AzSDKRGName) -Force -AsJob                            
                        }
                    }
                    else 
                    {
                        Remove-AzureRmResourceGroup -Name $([OldConstants]::AzSDKRGName) -Force -AsJob
                    }
                }
                catch {
                    #eat exception
                }  
            }          
        }
    }
}