DSCResources/MSFT_IntuneDerivedCredential/MSFT_IntuneDerivedCredential.psm1

function Get-TargetResource {
    [CmdletBinding()]
    [OutputType([System.Collections.Hashtable])]
    param (

        #region resource params

        [Parameter()]
        [System.String]
        $Id,

        [Parameter(Mandatory = $true)]
        [System.String]
        $DisplayName,

        [Parameter()]
        [System.String]
        $HelpUrl,

        [Parameter()]
        [ValidateSet('intercede', 'entrustData', 'purebred')]
        [System.String]
        $Issuer,

        [Parameter()]
        [ValidateSet('none', 'email', 'companyPortal', 'companyPortal,email')]
        [System.String]
        $NotificationType = 'none',

        [Parameter()]
        [System.Int32]
        $RenewalThresholdPercentage,

        #endregion resource params

        [Parameter()]
        [ValidateSet('Present', 'Absent')]
        [System.String]
        $Ensure = 'Present',

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $Credential,

        [Parameter()]
        [System.String]
        $ApplicationId,

        [Parameter()]
        [System.String]
        $TenantId,

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $ApplicationSecret,

        [Parameter()]
        [System.String]
        $CertificateThumbprint,

        [Parameter()]
        [Switch]
        $ManagedIdentity,

        [Parameter()]
        [System.String[]]
        $AccessTokens

    )

    New-M365DSCConnection -Workload 'MicrosoftGraph' `
        -InboundParameters $PSBoundParameters | Out-Null

    #Ensure the proper dependencies are installed in the current environment.
    Confirm-M365DSCDependencies

    #region Telemetry
    $ResourceName = $MyInvocation.MyCommand.ModuleName.Replace('MSFT_', '')
    $CommandName = $MyInvocation.MyCommand
    $data = Format-M365DSCTelemetryParameters -ResourceName $ResourceName `
        -CommandName $CommandName `
        -Parameters $PSBoundParameters
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

    $nullResult = $PSBoundParameters
    $nullResult.Ensure = 'Absent'

    try
    {
        $instance = $null
        if ($null -ne $Script:exportedInstances -and $Script:ExportMode)
        {
            $instance = $Script:exportedInstances | Where-Object -FilterScript {$_.Id -eq $Id}
        }

        if ($null -eq $instance)
        {
            $instance = Get-MgBetaDeviceManagementDerivedCredential -DeviceManagementDerivedCredentialSettingsId $Id -ErrorAction SilentlyContinue

            if ($null -eq $instance)
            {
                Write-Verbose -Message "Could not find Derived Credential by Id {$Id}."

                if (-Not [string]::IsNullOrEmpty($DisplayName))
                {
                    $instance = Get-MgBetaDeviceManagementDerivedCredential `
                        -Filter "DisplayName eq '$DisplayName'" `
                        -ErrorAction SilentlyContinue

                    if ($null -eq $instance)
                    {
                        Write-Verbose -Message "Could not find Derived Credential by DisplayName {$DisplayName}."
                        return $nullResult
                    }
                }
            }
        }

        $results = @{
            Ensure                      = 'Present'
            Id                          = $instance.Id
            DisplayName                 = $instance.DisplayName
            HelpUrl                     = $instance.HelpUrl
            Issuer                      = $instance.Issuer.ToString()
            NotificationType            = $instance.NotificationType.ToString()
            RenewalThresholdPercentage  = $instance.RenewalThresholdPercentage
            Credential                  = $Credential
            ApplicationId               = $ApplicationId
            TenantId                    = $TenantId
            CertificateThumbprint       = $CertificateThumbprint
            ApplicationSecret           = $ApplicationSecret
            ManagedIdentity             = $ManagedIdentity.IsPresent
            AccessTokens                = $AccessTokens
        }

        return [System.Collections.Hashtable] $results
    }
    catch
    {
        Write-Verbose -Message $_
        New-M365DSCLogEntry -Message 'Error retrieving data:' `
            -Exception $_ `
            -Source $($MyInvocation.MyCommand.Source) `
            -TenantId $TenantId `
            -Credential $Credential

        return $nullResult
    }
}

function Set-TargetResource {
    [CmdletBinding()]
    param (

        #region resource params

        [Parameter()]
        [System.String]
        $Id,

        [Parameter(Mandatory = $true)]
        [System.String]
        $DisplayName,

        [Parameter()]
        [System.String]
        $HelpUrl,

        [Parameter()]
        [ValidateSet('intercede', 'entrustData', 'purebred')]
        [System.String]
        $Issuer,

        [Parameter()]
        [System.Int32]
        $RenewalThresholdPercentage,

        #endregion resource params

        [Parameter()]
        [ValidateSet('none', 'email', 'companyPortal', 'companyPortal,email')]
        [System.String]
        $NotificationType = 'none',

        [Parameter()]
        [ValidateSet('Present', 'Absent')]
        [System.String]
        $Ensure='Present',

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $Credential,

        [Parameter()]
        [System.String]
        $ApplicationId,

        [Parameter()]
        [System.String]
        $TenantId,

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $ApplicationSecret,

        [Parameter()]
        [System.String]
        $CertificateThumbprint,

        [Parameter()]
        [Switch]
        $ManagedIdentity,

        [Parameter()]
        [System.String[]]
        $AccessTokens
    )

    #Ensure the proper dependencies are installed in the current environment.
    Confirm-M365DSCDependencies

    #region Telemetry
    $ResourceName = $MyInvocation.MyCommand.ModuleName.Replace('MSFT_', '')
    $CommandName = $MyInvocation.MyCommand
    $data = Format-M365DSCTelemetryParameters -ResourceName $ResourceName `
        -CommandName $CommandName `
        -Parameters $PSBoundParameters
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

    $currentInstance = Get-TargetResource @PSBoundParameters

    $setParameters = Remove-M365DSCAuthenticationParameter -BoundParameters $PSBoundParameters
    $setParameters.Remove('Id') | Out-Null

    # CREATE
    if ($Ensure -eq 'Present' -and $currentInstance.Ensure -eq 'Absent')
    {
        Write-Verbose -Message "Creating an Intune Derived Credential with DisplayName {$DisplayName}"

        New-MgBetaDeviceManagementDerivedCredential @SetParameters
    }
    # UPDATE is not supported API, it always creates a new Derived Credential instance
    # REMOVE
    elseif ($Ensure -eq 'Absent' -and $currentInstance.Ensure -eq 'Present')
    {
        Write-Verbose -Message "Removing the Intune Derived Credential with DisplayName {$DisplayName}"

        Remove-MgBetaDeviceManagementDerivedCredential -DeviceManagementDerivedCredentialSettingsId $currentInstance.Id -Confirm:$false
    }
}

function Test-TargetResource {
    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param (

        #region resource params

        [Parameter()]
        [System.String]
        $Id,

        [Parameter(Mandatory = $true)]
        [System.String]
        $DisplayName,

        [Parameter()]
        [System.String]
        $HelpUrl,

        [Parameter()]
        [ValidateSet('intercede', 'entrustData', 'purebred')]
        [System.String]
        $Issuer,

        [Parameter()]
        [ValidateSet('none', 'email', 'companyPortal', 'companyPortal,email')]
        [System.String]
        $NotificationType = 'none',

        [Parameter()]
        [System.Int32]
        $RenewalThresholdPercentage,

        #endregion resource params

        [Parameter()]
        [ValidateSet('Present', 'Absent')]
        [System.String]
        $Ensure = 'Present',

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $Credential,

        [Parameter()]
        [System.String]
        $ApplicationId,

        [Parameter()]
        [System.String]
        $TenantId,

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $ApplicationSecret,

        [Parameter()]
        [System.String]
        $CertificateThumbprint,

        [Parameter()]
        [Switch]
        $ManagedIdentity,

        [Parameter()]
        [System.String[]]
        $AccessTokens
    )

    Confirm-M365DSCDependencies

    #region Telemetry
    $ResourceName = $MyInvocation.MyCommand.ModuleName.Replace('MSFT_', '')
    $CommandName = $MyInvocation.MyCommand
    $data = Format-M365DSCTelemetryParameters -ResourceName $ResourceName `
        -CommandName $CommandName `
        -Parameters $PSBoundParameters
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

    $CurrentValues = Get-TargetResource @PSBoundParameters
    $ValuesToCheck = ([Hashtable]$PSBoundParameters).Clone()

    if ($CurrentValues.Ensure -ne $Ensure)
    {
        Write-Verbose -Message "Test-TargetResource returned $false"
        return $false
    }
    $testResult = $true

    $ValuesToCheck = Remove-M365DSCAuthenticationParameter -BoundParameters $ValuesToCheck
    $ValuesToCheck.Remove('Id') | Out-Null

    Write-Verbose -Message "Current Values: $(Convert-M365DscHashtableToString -Hashtable $CurrentValues)"
    Write-Verbose -Message "Target Values: $(Convert-M365DscHashtableToString -Hashtable $ValuesToCheck)"

    if ($testResult)
    {
        $testResult = Test-M365DSCParameterState -CurrentValues $CurrentValues `
            -Source $($MyInvocation.MyCommand.Source) `
            -DesiredValues $PSBoundParameters `
            -ValuesToCheck $ValuesToCheck.Keys
    }

    Write-Verbose -Message "Test-TargetResource returned $testResult"

    return $testResult
}

function Export-TargetResource {
    [CmdletBinding()]
    [OutputType([System.String])]
    param (

        #region resource params

        [Parameter()]
        [System.String]
        $Id,

        [Parameter()]
        [System.String]
        $DisplayName,

        [Parameter()]
        [System.String]
        $HelpUrl,

        [Parameter()]
        [ValidateSet('intercede', 'entrustData', 'purebred')]
        [System.String]
        $Issuer,

        [Parameter()]
        [ValidateSet('none', 'email', 'companyPortal', 'companyPortal,email')]
        [System.String]
        $NotificationType = 'none',

        [Parameter()]
        [System.Int32]
        $RenewalThresholdPercentage,

        #endregion resource params

        [Parameter()]
        [ValidateSet('Present', 'Absent')]
        [System.String]
        $Ensure = 'Present',

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $Credential,

        [Parameter()]
        [System.String]
        $ApplicationId,

        [Parameter()]
        [System.String]
        $TenantId,

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $ApplicationSecret,

        [Parameter()]
        [System.String]
        $CertificateThumbprint,

        [Parameter()]
        [Switch]
        $ManagedIdentity,

        [Parameter()]
        [System.String[]]
        $AccessTokens
    )

    $ConnectionMode = New-M365DSCConnection -Workload 'MicrosoftGraph' `
    -InboundParameters $PSBoundParameters

    #Ensure the proper dependencies are installed in the current environment.
    Confirm-M365DSCDependencies

    #region Telemetry
    $ResourceName = $MyInvocation.MyCommand.ModuleName.Replace('MSFT_', '')
    $CommandName = $MyInvocation.MyCommand
    $data = Format-M365DSCTelemetryParameters -ResourceName $ResourceName `
        -CommandName $CommandName `
        -Parameters $PSBoundParameters
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

    try
    {
        $Script:ExportMode = $true
        [array] $Script:exportedInstances = Get-MgBetaDeviceManagementDerivedCredential -ErrorAction Stop

        $i = 1
        $dscContent = ''
        if ($Script:exportedInstances.Length -eq 0)
        {
            Write-Host $Global:M365DSCEmojiGreenCheckMark
        }
        else
        {
            Write-Host "`r`n" -NoNewline
        }
        foreach ($config in $Script:exportedInstances)
        {
            $displayedKey = $config.Id
            Write-Host " |---[$i/$($Script:exportedInstances.Count)] $displayedKey" -NoNewline

            $params = @{
                Ensure                      = 'Present'
                Id                          = $config.Id
                DisplayName                 = $config.DisplayName
                HelpUrl                     = $config.HelpUrl
                Issuer                      = $config.Issuer.ToString()
                NotificationType            = $config.NotificationType.ToString()
                RenewalThresholdPercentage  = $config.RenewalThresholdPercentage
                Credential                  = $Credential
                AccessTokens                = $AccessTokens
                ApplicationId               = $ApplicationId
                TenantId                    = $TenantId
                ApplicationSecret           = $ApplicationSecret
                CertificateThumbprint       = $CertificateThumbprint
                ManagedIdentity             = $ManagedIdentity.IsPresent
            }

            $Results = Get-TargetResource @Params
            $Results = Update-M365DSCExportAuthenticationResults -ConnectionMode $ConnectionMode `
                -Results $Results

            $currentDSCBlock = Get-M365DSCExportContentForResource -ResourceName $ResourceName `
                -ConnectionMode $ConnectionMode `
                -ModulePath $PSScriptRoot `
                -Results $Results `
                -Credential $Credential
            $dscContent += $currentDSCBlock
            Save-M365DSCPartialExport -Content $currentDSCBlock `
                -FileName $Global:PartialExportFileName
            $i++
            Write-Host $Global:M365DSCEmojiGreenCheckMark
        }

        return $dscContent
    }
    catch
    {
        Write-Host $Global:M365DSCEmojiRedX

        New-M365DSCLogEntry -Message 'Error during Export:' `
            -Exception $_ `
            -Source $($MyInvocation.MyCommand.Source) `
            -TenantId $TenantId `
            -Credential $Credential

        return ''
    }
}

Export-ModuleMember -Function *-TargetResource