AzSK.ADO

1.0.0

Framework/Managers/PartialScanManager.ps1

Set-StrictMode -Version Latest

class PartialScanManager
{
    hidden [string] $subId = $null;
    hidden [PSObject] $ScanPendingForResources = $null;
    hidden [string] $ResourceScanTrackerFileName=$null;
    hidden [PartialScanResourceMap] $ResourceScanTrackerObj = $null
    [PSObject] $ControlSettings;
    hidden [ActiveStatus] $ActiveStatus = [ActiveStatus]::NotStarted;
    hidden [string] $CAScanProgressSnapshotsContainerName = [Constants]::CAScanProgressSnapshotsContainerName
    hidden [string] $AzSKTempStatePath = (Join-Path $([Constants]::AzSKAppFolderPath) "TempState" | Join-Path -ChildPath "PartialScanData");
    hidden [bool] $StoreResTrackerLocally = $false;
    hidden [string] $scanSource = $null;
    hidden [bool] $isRTFAlreadyAvailable = $false;
    hidden [bool] $isDurableStorageFound = $false;
    hidden [string] $masterFilePath;
    $storageContext = $null;


    hidden static [PartialScanManager] $Instance = $null;
    
    static [PartialScanManager] GetInstance([PSObject] $StorageAccount, [string] $SubscriptionId)
    {
        if ( $null -eq  [PartialScanManager]::Instance)
        {
            [PartialScanManager]::Instance = [PartialScanManager]::new($SubscriptionId);
        }
        [PartialScanManager]::Instance.subId = $SubscriptionId;
        return [PartialScanManager]::Instance
    }

    static [PartialScanManager] GetInstance()
    {
        if ( $null -eq  [PartialScanManager]::Instance)
        {
            [PartialScanManager]::Instance = [PartialScanManager]::new();
        }
        return [PartialScanManager]::Instance
    }
    static [void] ClearInstance()
    {
       [PartialScanManager]::Instance = $null
    }
    PartialScanManager([string] $SubscriptionId)
    {
        $this.ControlSettings = [ConfigurationManager]::LoadServerConfigFile("ControlSettings.json");
        $this.subId = $SubscriptionId;
        if ([string]::isnullorwhitespace($this.ResourceScanTrackerFileName))
        {
           if([ConfigurationManager]::GetAzSKSettings().IsCentralScanModeOn)
           {
                $this.ResourceScanTrackerFileName = Join-Path $SubscriptionId $([Constants]::ResourceScanTrackerCMBlobName)
           }
           else
           {
                $this.ResourceScanTrackerFileName = Join-Path $SubscriptionId $([Constants]::ResourceScanTrackerBlobName)
           }
        }
        $this.GetResourceScanTrackerObject();
    }

    PartialScanManager()
    {
        $this.ControlSettings = [ConfigurationManager]::LoadServerConfigFile("ControlSettings.json");
        if ([string]::isnullorwhitespace($this.ResourceScanTrackerFileName))
        {
            $this.ResourceScanTrackerFileName =  [Constants]::ResourceScanTrackerBlobName
        }
        $this.GetResourceScanTrackerObject();
    }

     hidden [void] GetResourceTrackerFile($subId)
    {
        $this.scanSource = [AzSKSettings]::GetInstance().GetScanSource();
        $this.subId = $subId

        #Validating the configuration of storing resource tracker file
        if($null -ne $this.ControlSettings.PartialScan)
        {
            $this.StoreResTrackerLocally = [Bool]::Parse($this.ControlSettings.PartialScan.StoreResourceTrackerLocally);
        }

        #Use local Resource Tracker files for partial scanning
        if ($this.StoreResTrackerLocally) 
        {
            if($null -eq $this.ScanPendingForResources)
            {
                if(![string]::isnullorwhitespace($this.subId)){
                    if(Test-Path (Join-Path (Join-Path $this.AzSKTempStatePath $this.subId) $this.ResourceScanTrackerFileName))    
                    {
                        $this.ScanPendingForResources = Get-Content (Join-Path (Join-Path $this.AzSKTempStatePath $this.subId) $this.ResourceScanTrackerFileName) -Raw
                    }
                    $this.masterFilePath = (Join-Path (Join-Path $this.AzSKTempStatePath $this.subId) $this.ResourceScanTrackerFileName)
                }
                else {
                    $this.masterFilePath = (Join-Path $this.AzSKTempStatePath $this.ResourceScanTrackerFileName)
                }
            }
        }

        If ($this.scanSource -eq "CA") # use storage in ADOScannerRG in case of CA scan
        {
            try {
                #Validate if Storage is found
                $keys = Get-AzStorageAccountKey -ResourceGroupName $env:StorageRG -Name $env:StorageName
                $this.StorageContext = New-AzStorageContext -StorageAccountName $env:StorageName -StorageAccountKey $keys[0].Value -Protocol Https
                $containerObject = Get-AzStorageContainer -Context $this.StorageContext -Name $this.CAScanProgressSnapshotsContainerName -ErrorAction SilentlyContinue
                    
                #If checkpoint container is found then get ResourceTracker.json (if exists)
                if($null -ne $containerObject)
                {
                    $controlStateBlob = Get-AzStorageBlob -Container $this.CAScanProgressSnapshotsContainerName -Context $this.StorageContext -Blob (Join-Path $this.subId.ToLower() $this.ResourceScanTrackerFileName) -ErrorAction SilentlyContinue

                    #If controlStateBlob is null then it will get created when we first write the resource tracker file to storage
                    #If its not null this means Resource tracker file has been found in storage and will be used to continue pending scan
                    if ($null -ne $controlStateBlob)
                    {
                        if ($null -ne $this.masterFilePath)
                        {
                            if (-not (Test-Path $this.masterFilePath))
                            {
                                $filePath = $this.masterFilePath.Replace($this.ResourceScanTrackerFileName, "")
                                New-Item -ItemType Directory -Path $filePath
                                New-Item -Path $filePath -Name $this.ResourceScanTrackerFileName -ItemType "file" 
                            }
                            Get-AzStorageBlobContent -CloudBlob $controlStateBlob.ICloudBlob -Context $this.StorageContext -Destination $this.masterFilePath -Force                
                            $this.ScanPendingForResources  = Get-ChildItem -Path $this.masterFilePath -Force | Get-Content | ConvertFrom-Json
                        }
                    }
                    $this.isDurableStorageFound = $true
                }
                #If checkpoint container is not found then create new
                else {
                    $containerObject = New-AzStorageContainer -Name $this.CAScanProgressSnapshotsContainerName -Context $this.StorageContext -ErrorAction SilentlyContinue
                    if ($null -ne $containerObject )
                    {
                        $this.isDurableStorageFound = $true
                    }
                    else 
                    {
                        $this.PublishCustomMessage("Could not find/create partial scan container in storage.", [MessageType]::Warning);
                    }
                }
            }
            catch {
                $this.PublishCustomMessage("Exception when trying to find/create partial scan container: $_.", [MessageType]::Warning);
                #Eat exception
            }

        }
        
        elseif ($this.scanSource -eq "CICD") # use extension storage in case of CICD partial scan
        {
                if(![string]::isnullorwhitespace($this.subId))
                {
                    $rmContext = [ContextHelper]::GetCurrentContext();
                    $user = "";
                    $base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("{0}:{1}" -f $user,$rmContext.AccessToken)))
                    $uri= "";

                    if (Test-Path env:partialScanURI)
                    {
                        #Uri is created in cicd task based on jobid
                        $uri = $env:partialScanURI
                    }
                    else {
                        $uri = [Constants]::StorageUri -f $this.subId, $this.subId, "ResourceTrackerFile"
                    }

                    try {
                        $webRequestResult = Invoke-RestMethod -Uri $uri -Method Get -ContentType "application/json" -Headers @{Authorization=("Basic {0}" -f $base64AuthInfo)}
                        $this.ScanPendingForResources = $webRequestResult.value | ConvertFrom-Json
                        $this.isRTFAlreadyAvailable = $true;
                    }
                    catch
                    {
                        $this.ScanPendingForResources = $null
                        $this.isRTFAlreadyAvailable = $false;
                    }    
                }
        }
        
    }

    #Update resource status in ResourceMapTable object
    [void] UpdateResourceStatus([string] $resourceId, [ScanState] $state)
    {
        $resourceValues = @();
        #$this.GetResourceScanTrackerObject();
        if($this.IsListAvailableAndActive())
        {
            $resourceValue = $this.ResourceScanTrackerObj.ResourceMapTable | Where-Object { $_.Id -eq $resourceId};
            if($null -ne $resourceValue)
            {
                $resourceValue.ModifiedDate = [DateTime]::UtcNow;
                $resourceValue.State = $state;
            }
            else
            {
                $resourceValue = [PartialScanResource]@{
                    Id = $resourceId;
                    State = $state;
                    ScanRetryCount = 1;
                    CreatedDate = [DateTime]::UtcNow;
                    ModifiedDate = [DateTime]::UtcNow;
                }
                $this.ResourceScanTrackerObj.ResourceMapTable +=$resourceValue;
            }
        }
    }

    [void] UpdateResourceScanRetryCount([string] $resourceId)
    {
        $resourceValues = @();
        if($this.IsListAvailableAndActive())
        {
            $resourceValue = $this.ResourceScanTrackerObj.ResourceMapTable | Where-Object { $_.Id -eq $resourceId};
            if($null -ne $resourceValue)
            {
                $resourceValue.ModifiedDate = [DateTime]::UtcNow;
                $resourceValue.ScanRetryCount = $resourceValue.ScanRetryCount + 1;
                if($resourceValue.ScanRetryCount -ge [Constants]::PartialScanMaxRetryCount)
                {
                    $resourceValue.State = [ScanState]::ERR
                }
            }
            else
            {
                #do nothing
            }
        }
    }

    # Method to remove obsolete Resource Tracker file
    [void] RemovePartialScanData()
    {
        If ($this.scanSource -eq "CICD")
        {
            if($null -ne $this.ResourceScanTrackerObj)
            {
                $rmContext = [ContextHelper]::GetCurrentContext();
                $user = "";
                $base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("{0}:{1}" -f $user,$rmContext.AccessToken)))
                $uri ="";

                if (Test-Path env:partialScanURI)
                    {
                        #Uri is created by cicd task based on jobid
                        $uri = $env:partialScanURI
                    }
                else {
                    $uri = [Constants]::StorageUri -f $this.subId, $this.subId, "ResourceTrackerFile"
                }
                
                try {
                    if ($this.ResourceScanTrackerObj.ResourceMapTable -ne $null){
                        $webRequestResult = Invoke-WebRequest -Uri $uri -Method Delete -ContentType "application/json" -Headers @{Authorization = ("Basic {0}" -f $base64AuthInfo) } 
                        $this.ResourceScanTrackerObj = $null
                    }
                }
                catch {
                    #do nothing
                }
            }
        }
        elseif ($this.scanSource -eq "CA" -and $this.isDurableStorageFound) {
            $controlStateBlob = Get-AzStorageBlob -Container $this.CAScanProgressSnapshotsContainerName -Context $this.storageContext -Blob (Join-Path $this.subId.ToLower() $this.ResourceScanTrackerFileName) -ErrorAction SilentlyContinue

            #Move resource tracker file to archive folder
            if($null -ne $controlStateBlob)
            {
                $archiveName = "Checkpoint_" +(Get-Date).ToUniversalTime().ToString("yyyyMMddHHmmss") + ".json";
                Set-AzStorageBlobContent -File $this.masterFilePath -Container $this.CAScanProgressSnapshotsContainerName -Blob (Join-Path $this.subId.ToLower() (Join-Path "Archive" $archiveName)) -BlobType Block -Context $this.storageContext -Force
                Remove-AzStorageBlob -CloudBlob $controlStateBlob.ICloudBlob -Force -Context $this.StorageContext 
            }    
        }

        #Use local Resource Tracker files for partial scanning
        if ($this.StoreResTrackerLocally) 
            {
            if($null -ne $this.ResourceScanTrackerObj)
            {
                if(![string]::isnullorwhitespace($this.subId)){
                    if(Test-Path (Join-Path $this.AzSKTempStatePath $this.subId))
                    {
                        Remove-Item -Path (Join-Path (Join-Path $this.AzSKTempStatePath $this.subId) $this.ResourceScanTrackerFileName)
                        
                        <#Create archive folder if not exists
                        if(-not (Test-Path (Join-Path (Join-Path $this.AzSKTempStatePath $this.subId) "archive")))
                        {
                            New-Item -ItemType Directory -Path (Join-Path (Join-Path $this.AzSKTempStatePath $this.subId) "archive")
                        }
                        $timestamp =(Get-Date -format "yyMMddHHmmss")
                        Move-Item -Path (Join-Path (Join-Path $this.AzSKTempStatePath $this.subId) $this.ResourceScanTrackerFileName) -Destination (Join-Path (Join-Path (Join-Path $this.AzSKTempStatePath $this.subId) "archive")"Checkpoint_$($timestamp)")
                        #>
                    }
                }
                $this.ResourceScanTrackerObj = $null
            }
        }
    }

    #Method to fetch all applicable resources as per input command (including those with "COMP" status in ResourceTracker file)
    [void] CreateResourceMasterList([PSObject] $resourceIds)
    {
        if(($resourceIds | Measure-Object).Count -gt 0)
        {
            $resourceIdMap = @();
            $resourceIds | ForEach-Object {
                $resourceId = $_;
                $resourceValue = [PartialScanResource]@{
                    Id = $resourceId;
                    State = [ScanState]::INIT;
                    ScanRetryCount = 0;
                    CreatedDate = [DateTime]::UtcNow;
                    ModifiedDate = [DateTime]::UtcNow;
                }
                #$resourceIdMap.Add($hashId,$resourceValue);
                $resourceIdMap +=$resourceValue
            }
            $masterControlBlob = [PartialScanResourceMap]@{
                Id = [DateTime]::UtcNow.ToString("yyyyMMdd_HHmmss");
                CreatedDate = [DateTime]::UtcNow;
                ResourceMapTable = $resourceIdMap;
            }

            if ($this.ScanPendingForResources -ne $null -and $this.scanSource -eq "CICD"){
                $this.ResourceScanTrackerObj = [PartialScanResourceMap]@{
                    Id = $this.ScanPendingForResources.Id;
                    CreatedDate = $this.ScanPendingForResources.CreatedDate;
                    ResourceMapTable = $this.ScanPendingForResources.ResourceMapTable.value;
                }
            }
            else{
                $this.ResourceScanTrackerObj = $masterControlBlob;
            }

            $this.WriteToResourceTrackerFile();
            $this.WriteToDurableStorage();

            $this.ActiveStatus = [ActiveStatus]::Yes;
        }
    }

    [void] WriteToResourceTrackerFile()
    {
        If ($this.StoreResTrackerLocally) 
        {
            if($null -ne $this.ResourceScanTrackerObj)
            {
                if(![string]::isnullorwhitespace($this.subId)){
                    if(-not (Test-Path (Join-Path $this.AzSKTempStatePath $this.subId)))
                    {
                        New-Item -ItemType Directory -Path (Join-Path $this.AzSKTempStatePath $this.subId) -ErrorAction Stop | Out-Null
                    }    
                }
                else{
                    if(-not (Test-Path "$this.AzSKTempStatePath"))
                    {
                        New-Item -ItemType Directory -Path "$this.AzSKTempStatePath" -ErrorAction Stop | Out-Null
                    }
                }
                [JsonHelper]::ConvertToJsonCustom($this.ResourceScanTrackerObj) | Out-File $this.masterFilePath -Force
            }
        }
    }

    [void] WriteToDurableStorage()
    {
        If ($this.scanSource -eq "CICD")
        {
            if($null -ne $this.ResourceScanTrackerObj)
            {
                if(![string]::isnullorwhitespace($this.subId))
                {
                    $rmContext = [ContextHelper]::GetCurrentContext();
                    $user = "";
                    $uri = "";
                    $base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("{0}:{1}" -f $user,$rmContext.AccessToken)))
                    $scanObject = $this.ResourceScanTrackerObj | ConvertTo-Json
                    $body = "";

                    if (Test-Path env:partialScanURI)
                    {
                        $uri = $env:partialScanURI
                        $JobId ="";
                        $JobId = $uri.Replace('?','/').Split('/')[$JobId.Length -2]
                        if ($this.isRTFAlreadyAvailable -eq $true){
                            $body = @{"id" = $Jobid; "__etag"=-1; "value"= $scanObject;} | ConvertTo-Json
                        }
                        else{
                            $body = @{"id" = $Jobid; "value"= $scanObject;} | ConvertTo-Json
                        }
                    }
                    else {
                        $uri = [Constants]::StorageUri -f $this.subId, $this.subId, "ResourceTrackerFile"
                        if ($this.isRTFAlreadyAvailable -eq $true){
                            $body = @{"id" = "ResourceTrackerFile";"__etag"=-1; "value"= $scanObject;} | ConvertTo-Json
                        }
                        else{
                            $body = @{"id" = "ResourceTrackerFile"; "value"= $scanObject;} | ConvertTo-Json
                        }
                    }

                    try {
                        $webRequestResult = Invoke-WebRequest -Uri $uri -Method Put -ContentType "application/json" -Headers @{Authorization = ("Basic {0}" -f $base64AuthInfo) } -Body $body 
                        $this.isRTFAlreadyAvailable = $true;
                    }
                    catch
                    {
                        write-host "Could not update resource tracker file."
                    }        
                }
            }
        }
        elseif ($this.scanSource -eq "CA" -and $this.isDurableStorageFound) 
        {
            Set-AzStorageBlobContent -File $this.masterFilePath -Container $this.CAScanProgressSnapshotsContainerName -Blob (Join-Path $this.subId.ToLower() $this.ResourceScanTrackerFileName) -BlobType Block -Context $this.StorageContext -Force
        }
    }

    #Method to fetch ResourceTrackerFile as an object
    hidden [void] GetResourceScanTrackerObject()
    {
            if($null -eq $this.ScanPendingForResources)
            {
                return;
            }
            If ($this.scanSource -eq "CICD") # use extension storage in case of CICD partial scan
            {
                if(![string]::isnullorwhitespace($this.ScanPendingForResources))
                {
                    $this.ResourceScanTrackerObj = [PartialScanResourceMap]@{
                        Id = $this.ScanPendingForResources.Id;
                        CreatedDate = $this.ScanPendingForResources.CreatedDate;
                        ResourceMapTable = $this.ScanPendingForResources.ResourceMapTable.value;
                    }
                }
            }
            elseif ($this.StoreResTrackerLocally) 
            {
                if(![string]::isnullorwhitespace($this.subId)){
                    if(-not (Test-Path (Join-Path $this.AzSKTempStatePath $this.subId)))
                    {
                        New-Item -ItemType Directory -Path (Join-Path $this.AzSKTempStatePath $this.subId) -ErrorAction Stop | Out-Null
                    }
                }
                else{
                    if(-not (Test-Path "$this.AzSKTempStatePath"))
                    {
                        New-Item -ItemType Directory -Path "$this.AzSKTempStatePath" -ErrorAction Stop | Out-Null
                    }
                }
                $this.ResourceScanTrackerObj = Get-content $this.masterFilePath | ConvertFrom-Json
            }
    }

    [ActiveStatus] IsPartialScanInProgress($subId)
    {
        $this.GetResourceTrackerFile($subId);
        if($null -ne $this.ControlSettings.PartialScan)
        {
            $resourceTrackerFileValidforDays = [Int32]::Parse($this.ControlSettings.PartialScan.ResourceTrackerValidforDays);
            $this.GetResourceScanTrackerObject();
            if($null -eq $this.ResourceScanTrackerObj)
            {
                return $this.ActiveStatus = [ActiveStatus]::No;
            }
            $shouldStopScanning = ($this.ResourceScanTrackerObj.ResourceMapTable | Where-Object {$_.State -notin ([ScanState]::COMP,[ScanState]::ERR)} |  Measure-Object).Count -eq 0
            if($this.ResourceScanTrackerObj.CreatedDate.AddDays($resourceTrackerFileValidforDays) -lt [DateTime]::UtcNow -or $shouldStopScanning)
            {
                $this.RemovePartialScanData();
                $this.ScanPendingForResources = $null;
                return $this.ActiveStatus = [ActiveStatus]::No;
            }
            return $this.ActiveStatus = [ActiveStatus]::Yes
        }
        else
        {
            $this.ScanPendingForResources = $null;
            return $this.ActiveStatus = [ActiveStatus]::No;
        }
    }

    [PSObject] GetNonScannedResources()
    {
        $nonScannedResources = @();
        $this.GetResourceScanTrackerObject();
        if($this.IsListAvailableAndActive())
        {
            $nonScannedResources +=[PartialScanResource[]] $this.ResourceScanTrackerObj.ResourceMapTable | Where-Object {$_.State -eq [ScanState]::INIT}
            return $nonScannedResources;
        }
        return $null;
    }

    [PSObject] GetAllListedResources()
    {
        $nonScannedResources = @();
        $this.GetResourceScanTrackerObject();
        if($this.IsListAvailableAndActive())
        {
            $nonScannedResources += $this.ResourceScanTrackerObj.ResourceMapTable
            return $nonScannedResources;
        }
        return $null;
    }

    [Bool] IsListAvailableAndActive()
    {
        if($null -ne $this.ResourceScanTrackerObj -and $this.ActiveStatus -eq [ActiveStatus]::Yes -and $null -ne $this.ResourceScanTrackerObj.ResourceMapTable)
        {
            return $true
        }
        else
        {
            return $false
        }
    }
}