functions/Backup-DbaDbMasterKey.ps1
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function Backup-DbaDbMasterKey { <# .SYNOPSIS Backs up specified database master key. .DESCRIPTION Backs up specified database master key. .PARAMETER SqlInstance The target SQL Server instance or instances. .PARAMETER SqlCredential Login to the target instance using alternative credentials. Accepts PowerShell credentials (Get-Credential). Windows Authentication, SQL Server Authentication, Active Directory - Password, and Active Directory - Integrated are all supported. For MFA support, please use Connect-DbaInstance. .PARAMETER Database Backup master key from specific database(s). .PARAMETER ExcludeDatabase The database(s) to exclude - this list is auto-populated from the server. .PARAMETER Path The directory to export the key. If no path is specified, the default backup directory for the instance will be used. .PARAMETER Credential Pass a credential object for the password .PARAMETER SecurePassword The password to encrypt the exported key. This must be a SecureString. .PARAMETER InputObject Database object piped in from Get-DbaDatabase .PARAMETER WhatIf Shows what would happen if the command were to run. No actions are actually performed. .PARAMETER Confirm Prompts you for confirmation before executing any changing operations within the command. .PARAMETER EnableException By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message. This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting. Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch. .NOTES Tags: Certificate, Database Author: Chrissy LeMaire (@cl), netnerds.net Website: https://dbatools.io Copyright: (c) 2018 by dbatools, licensed under MIT License: MIT https://opensource.org/licenses/MIT .EXAMPLE PS C:\> Backup-DbaDbMasterKey -SqlInstance server1\sql2016 ``` ComputerName : SERVER1 InstanceName : SQL2016 SqlInstance : SERVER1\SQL2016 Database : master Filename : E:\MSSQL13.SQL2016\MSSQL\Backup\server1$sql2016-master-20170614162311.key Status : Success ``` Prompts for export password, then logs into server1\sql2016 with Windows credentials then backs up all database keys to the default backup directory. .EXAMPLE PS C:\> Backup-DbaDbMasterKey -SqlInstance Server1 -Database db1 -Path \\nas\sqlbackups\keys Logs into sql2016 with Windows credentials then backs up db1's keys to the \\nas\sqlbackups\keys directory. #> [CmdletBinding(SupportsShouldProcess, ConfirmImpact = 'Low')] param ( [DbaInstanceParameter[]]$SqlInstance, [PSCredential]$SqlCredential, [PSCredential]$Credential, [string[]]$Database, [string[]]$ExcludeDatabase, [Alias("Password")] [Security.SecureString]$SecurePassword, [string]$Path, [parameter(ValueFromPipeline)] [Microsoft.SqlServer.Management.Smo.Database[]]$InputObject, [switch]$EnableException ) begin { if ($Credential) { $SecurePassword = $Credential.Password } } process { foreach ($instance in $SqlInstance) { $InputObject += Get-DbaDatabase -SqlInstance $SqlInstance -SqlCredential $SqlCredential -Database $Database -ExcludeDatabase $ExcludeDatabase } foreach ($db in $InputObject) { $server = $db.Parent if (Test-Bound -ParameterName Path -Not) { $Path = $server.BackupDirectory } if (-not $Path) { Stop-Function -Message "Path discovery failed. Please explicitly specify -Path" -Target $server -Continue } if (!(Test-DbaPath -SqlInstance $server -Path $Path)) { Stop-Function -Message "$instance cannot access $Path" -Target $server -ErrorRecord $_ -Continue } if (!$db.IsAccessible) { Write-Message -Level Warning -Message "Database $db is not accessible. Skipping." continue } $masterkey = $db.MasterKey if (!$masterkey) { Write-Message -Message "No master key exists in the $db database on $instance" -Target $db -Level Verbose continue } # If you pass a password param, then you will not be prompted for each database, but it wouldn't be a good idea to build in insecurity if (-not $SecurePassword -and -not $Credential) { $SecurePassword = Read-Host -AsSecureString -Prompt "You must enter Service Key password for $instance" $SecurePassword2 = Read-Host -AsSecureString -Prompt "Type the password again" if (([System.Runtime.InteropServices.marshal]::PtrToStringAuto([System.Runtime.InteropServices.marshal]::SecureStringToBSTR($SecurePassword))) -ne ([System.Runtime.InteropServices.marshal]::PtrToStringAuto([System.Runtime.InteropServices.marshal]::SecureStringToBSTR($SecurePassword2)))) { Stop-Function -Message "Passwords do not match" -Continue } } $time = (Get-Date -Format yyyMMddHHmmss) $dbname = $db.name $Path = $Path.TrimEnd("\") $fileinstance = $instance.ToString().Replace('\', '$') $filename = "$Path\$fileinstance-$dbname-$time.key" if ($Pscmdlet.ShouldProcess($instance, "Backing up master key to $filename")) { try { $masterkey.Export($filename, [System.Runtime.InteropServices.marshal]::PtrToStringAuto([System.Runtime.InteropServices.marshal]::SecureStringToBSTR($SecurePassword))) $status = "Success" } catch { $status = "Failure" Write-Message -Level Warning -Message "Backup failure: $($_.Exception.InnerException)" } Add-Member -Force -InputObject $masterkey -MemberType NoteProperty -Name ComputerName -value $server.ComputerName Add-Member -Force -InputObject $masterkey -MemberType NoteProperty -Name InstanceName -value $server.ServiceName Add-Member -Force -InputObject $masterkey -MemberType NoteProperty -Name SqlInstance -value $server.DomainInstanceName Add-Member -Force -InputObject $masterkey -MemberType NoteProperty -Name Database -value $dbname Add-Member -Force -InputObject $masterkey -MemberType NoteProperty -Name Filename -value $filename Add-Member -Force -InputObject $masterkey -MemberType NoteProperty -Name Status -value $status Select-DefaultView -InputObject $masterkey -Property ComputerName, InstanceName, SqlInstance, Database, 'Filename as Path', Status } } } } |