AzSK.ADO

1.16.0

Framework/Helpers/IdentityHelpers.ps1

                                Set-StrictMode -Version Latest 

class IdentityHelpers

{

    static hidden [bool] $hasGraphAccess = $false

    static hidden [string] $graphAccessToken = $null

    static hidden [string] $ALTControlEvaluationMethod

    static hidden [bool] $hasSIPAccess = $false

    static hidden [string] $dataExplorerAccessToken = $null

    hidden static [bool] IsAltAccount($SignInName, $graphToken)

    {

        $isAltAccount = $false

        $headers = @{"Authorization"= ("Bearer " + $graphToken); "Content-Type"="application/json"}

        $uri=""

        $graphURI = [WebRequestHelper]::GetGraphUrl()

        if (-not [string]::IsNullOrWhiteSpace($SignInName))

        {

            $uri = [string]::Format('{0}/v1.0/users/{1}?$select=onPremisesExtensionAttributes', $graphURI, $SignInName)

        }

        else

        {

            return $false

        }

        try

        { 

            $responseObj = [WebRequestHelper]::InvokeGetWebRequest($uri, $headers);

            if ($null -ne $responseObj -and ($responseObj | Measure-Object).Count -gt 0)

            {

                # extensionAttribute contains 15 different values which define unique properties for users.

                $extensionAttributes = $responseObj.onPremisesExtensionAttributes

                #"extensionAttribute2" contains the integer values which represents the different types of users.

                #"extensionAttribute2: -10" => SC-ALT Accounts

                if($extensionAttributes.extensionAttribute2 -eq "-10")

                {

                    $isAltAccount = $true

                }

            }

        } 

        catch

        { 

            return $false;

        }

        return $isAltAccount

    }

    hidden static [bool] IsServiceAccount($SignInName, $subjectKind, $graphToken)

    {

        $isServiceAccount = $false

        $headers = @{"Authorization"= ("Bearer " + $graphToken); "Content-Type"="application/json"}

        $uri=""

        $graphURI = [WebRequestHelper]::GetGraphUrl()

        if($subjectKind -eq "User")

        {

            if (-not [string]::IsNullOrWhiteSpace($SignInName))

            {

                $uri = [string]::Format('{0}/v1.0/users/{1}?$select=onPremisesImmutableId,onPremisesExtensionAttributes', $graphURI, $SignInName)

            }

            else

            {

                return $false

            }

        }

        else

        {

            return $false

        }

        try

        { 

            $responseObj = [WebRequestHelper]::InvokeGetWebRequest($uri, $headers);

            if ($null -ne $responseObj -and ($responseObj | Measure-Object).Count -gt 0)

            {

                # extensionAttribute contains 15 different values which define unique properties for users.

                $extensionAttributes = $responseObj.onPremisesExtensionAttributes

                #"extensionAttribute2" contains the integer values which represents the different types of users.

                #"extensionAttribute2: -9" => Service Accounts

                if($extensionAttributes.extensionAttribute2 -eq "-9")

                {

                    $isServiceAccount = $true

                }

            }

        } 

        catch

        { 

            return $false;

        }

        return $isServiceAccount

    }

    hidden static [bool] IsADObjectGUID($immutableId){        

        try {

            $decodedII = [system.convert]::frombase64string($immutableId)

            $guid = [GUID]$decodedII    

        }

        catch {

            return $false

        }

        return $true

    }

    static CheckGraphAccess()

    {

        # In CA mode, we use azure context to fetch the graph access token, because VSTS authentication is not supported in CA.

        $useAzContext = $false

        $scanSource = [AzSKSettings]::GetInstance().GetScanSource();

        if ($scanSource -eq 'CICD') {

            [IdentityHelpers]::hasGraphAccess = $false

        }

        else

        {

            if ($scanSource -eq "CA") {

                $useAzContext = $true

            }

            $graphUri = [WebRequestHelper]::GetGraphUrl()

            $uri = $GraphUri + "/v1.0/users?`$top=1"

            [IdentityHelpers]::graphAccessToken = [ContextHelper]::GetGraphAccessToken($useAzContext)

            if (-not [string]::IsNullOrWhiteSpace([IdentityHelpers]::graphAccessToken))

            {

                $header = @{

                    "Authorization"= ("Bearer " + [IdentityHelpers]::graphAccessToken); 

                    "Content-Type"="application/json"

                };

                try

                {

                    $webResponse = [WebRequestHelper]::InvokeGetWebRequest($uri, $header);

                    [IdentityHelpers]::hasGraphAccess = $true;

                }

                catch

                {

                    [IdentityHelpers]::hasGraphAccess = $false;

                }

            }

        }

    }

    static CheckSIPAccess()

    {

        # In CA mode, we use azure context to fetch the data explorer access token, because VSTS authentication is not supported in CA.

        $useAzContext = $false

        $scanSource = [AzSKSettings]::GetInstance().GetScanSource();

        if ($scanSource -eq 'CICD') {

            [IdentityHelpers]::hasSIPAccess = $false

        }

        else

        {

            if ($scanSource -eq "CA") {

                $useAzContext = $true

            }

            [IdentityHelpers]::dataExplorerAccessToken = [ContextHelper]::GetDataExplorerAccessToken($useAzContext)

            if (-not [string]::IsNullOrWhiteSpace([IdentityHelpers]::dataExplorerAccessToken))

            {

                $header = @{

                    "Authorization" = "Bearer " + [IdentityHelpers]::dataExplorerAccessToken

                }

                $apiURL = "https://dsresip.kusto.windows.net/v2/rest/query" 

                # making a samlple api call, just to check if user has access to required SIP database.                                                                   

                $inputbody = "{`"db`": `"AADUsersData`",`"csl`": `"UsersInfo | take 1`"}"

                try

                {

                    $kustoResponse = Invoke-RestMethod -Uri $apiURL -Method Post  -ContentType "application/json; charset=utf-8" -Headers $header -Body $inputbody; 

                    [IdentityHelpers]::hasSIPAccess = $true;

                }

                catch

                {

                    [IdentityHelpers]::hasSIPAccess = $false;

                }

            }

        }

    }

    #This method differentiate human accounts and service account from the list.

    hidden static [PSObject] DistinguishHumanAndServiceAccount([PSObject] $allMembers, $orgName)

    {

        $humanAccount = @(); 

        $serviceAccount = @();

        $defaultSvcAcc = @(); #"Account Service ($orgName)" # This is default service account automatically added by ADO.

        $allMembers | ForEach-Object{

            if (-not [string]::IsNullOrEmpty($_.mailAddress)) 

            {

                $isServiceAccount = [IdentityHelpers]::IsServiceAccount($_.mailAddress, $_.subjectKind, [IdentityHelpers]::graphAccessToken)

                if ($isServiceAccount)

                {

                    $serviceAccount += $_

                }

                else

                {

                    $humanAccount += $_

                }

            }

            else {

                $defaultSvcAcc += $_

            }

        }

        if ($null -ne $defaultSvcAcc -and $defaultSvcAcc.Count -gt 0) {

            $serviceAccount += $defaultSvcAcc

        }

        $adminMembers = @{serviceAccount = $serviceAccount; humanAccount = $humanAccount;};

        return $adminMembers

    }

    #This method differentiate alt accounts and non-alt account from the list.

    hidden static [PSObject] DistinguishAltAndNonAltAccount([PSObject] $allMembers)

    {

        $altAccount = @(); 

        $nonAltAccount = @();

        $allMembers | ForEach-Object{

            $isAltAccount = [IdentityHelpers]::IsAltAccount($_.mailAddress, [IdentityHelpers]::graphAccessToken)

            if ($isAltAccount)

            {

                $altAccount += $_

            }

            else

            {

                $nonAltAccount += $_

            }

        }

        $adminMembers = @{altAccount = $altAccount; nonAltAccount = $nonAltAccount;};

        return $adminMembers

    }

}

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