Plugins/Hetzner.ps1
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function Get-CurrentPluginType { 'dns-01' } Function Add-DnsTxt { [CmdletBinding(DefaultParameterSetName='Secure')] param( [Parameter(Mandatory,Position = 0)] [string]$RecordName, [Parameter(Mandatory,Position = 1)] [string]$TxtValue, [Parameter(ParameterSetName='Secure',Mandatory,Position=2)] [securestring]$HetznerToken, [Parameter(ParameterSetName='DeprecatedInsecure',Mandatory,Position=2)] [string]$HetznerTokenInsecure, [Parameter(ValueFromRemainingArguments)] $ExtraParams ) $apiRoot = 'https://dns.hetzner.com/api/v1' # un-secure the password so we can add it to the auth header if ('Secure' -eq $PSCmdlet.ParameterSetName) { $HetznerTokenInsecure = [pscredential]::new('a',$HetznerToken).GetNetworkCredential().Password } $restParams = @{ Headers = @{ 'Auth-API-Token' = $HetznerTokenInsecure Accept = 'application/json' } ContentType = 'application/json' Verbose = $false } # find matching ZoneID to check, if the records exists already if (-not ($zone = Find-HetznerZone $RecordName $restParams)) { throw "Unable to find matching zone for $RecordName" } # separate the portion of the name that doesn't contain the zone name $recShort = ($RecordName -ireplace [regex]::Escape($zone.name), [string]::Empty).TrimEnd('.') # Get a list of existing TXT records for this record name try { Write-Verbose "Searching for existing TXT record" $query = "$apiRoot/records?zone_id=$($zone.id)" Write-Debug "GET $query" $recs = Invoke-RestMethod $query @restParams @Script:UseBasic -EA Stop } catch { throw } # check for a matching record $rec = $recs.records | Where-Object { $_.type -eq 'TXT' -and $_.name -eq $recShort -and $_.value -eq $TxtValue } if ($rec) { Write-Debug "Record $RecordName already contains $TxtValue. Nothing to do." } else { $queryParams = @{ Uri = "$apiRoot/records" Method = 'POST' Body = @{ name = $recShort ttl = 600 type = 'TXT' value = $TxtValue zone_id = $zone.id } | ConvertTo-Json ErrorAction = 'Stop' } try { Write-Verbose "Add Record $RecordName with value $TxtValue." Write-Debug "POST $($queryParams.Uri)`n$($queryParams.Body)" Invoke-RestMethod @queryParams @restParams @Script:UseBasic | Out-Null } catch { throw } } <# .SYNOPSIS Add a DNS TXT record to Hetzner. .DESCRIPTION Uses the Hetzner DNS API to add or update a DNS TXT record. .PARAMETER RecordName The fully qualified name of the TXT record. .PARAMETER TxtValue The value of the TXT record. .PARAMETER HetznerToken The API token for your Hetzner account. .PARAMETER HetznerTokenInsecure (DEPRECATED) The API token for your Hetzner account. .PARAMETER ExtraParams This parameter can be ignored and is only used to prevent errors when splatting with more parameters than this function supports. .EXAMPLE $token = Read-Host 'Token' -AsSecureString Add-DnsTxt '_acme-challenge.example.com' 'txt-value' -HetznerToken $token Adds or updates the specified TXT record with the specified value. #> } Function Remove-DnsTxt { [CmdletBinding(DefaultParameterSetName='Secure')] param( [Parameter(Mandatory,Position = 0)] [string]$RecordName, [Parameter(Mandatory,Position = 1)] [string]$TxtValue, [Parameter(ParameterSetName='Secure',Mandatory,Position=2)] [securestring]$HetznerToken, [Parameter(ParameterSetName='DeprecatedInsecure',Mandatory,Position=2)] [string]$HetznerTokenInsecure, [Parameter(ValueFromRemainingArguments)] $ExtraParams ) $apiRoot = 'https://dns.hetzner.com/api/v1' # un-secure the password so we can add it to the auth header if ('Secure' -eq $PSCmdlet.ParameterSetName) { $HetznerTokenInsecure = [pscredential]::new('a',$HetznerToken).GetNetworkCredential().Password } $restParams = @{ Headers = @{ 'Auth-API-Token' = $HetznerTokenInsecure Accept = 'application/json' } ContentType = 'application/json' Verbose = $false } # find matching ZoneID to check, if the records exists already if (-not ($zone = Find-HetznerZone $RecordName $restParams)) { throw "Unable to find matching zone for $RecordName" } # separate the portion of the name that doesn't contain the zone name $recShort = ($RecordName -ireplace [regex]::Escape($zone.name), [string]::Empty).TrimEnd('.') # Get a list of existing TXT records for this record name try { Write-Verbose "Searching for existing TXT record" $query = "$apiRoot/records?zone_id=$($zone.id)" Write-Debug "GET $query" $recs = Invoke-RestMethod $query @restParams @Script:UseBasic -EA Stop } catch { throw } # check for a matching record $rec = $recs.records | Where-Object { $_.type -eq 'TXT' -and $_.name -eq $recShort -and $_.value -eq $TxtValue } if ($rec) { try { Write-Verbose "Remove Record $RecordName ($($rec.Id)) with value $TxtValue." $query = "$apiRoot/records/$($rec.Id)" Write-Debug "DELETE $query" Invoke-RestMethod $query -Method Delete @restParams @Script:UseBasic -EA Stop | Out-Null } catch { throw } } else { Write-Debug "Record $RecordName with value $TxtValue doesn't exist. Nothing to do." } <# .SYNOPSIS Remove a DNS TXT record from Hetzner. .DESCRIPTION Uses the Hetzner DNS API to remove DNS TXT record. .PARAMETER RecordName The fully qualified name of the TXT record. .PARAMETER TxtValue The value of the TXT record. .PARAMETER HetznerToken The API token for your Hetzner account. .PARAMETER HetznerTokenInsecure (DEPRECATED) The API token for your Hetzner account. .PARAMETER ExtraParams This parameter can be ignored and is only used to prevent errors when splatting with more parameters than this function supports. .EXAMPLE $token = Read-Host 'Token' -AsSecureString Remove-DnsTxt '_acme-challenge.example.com' 'txt-value' -HetznerToken $token Removes the specified TXT record with the specified value. #> } function Save-DnsTxt { [CmdletBinding()] param( [Parameter(ValueFromRemainingArguments)] $ExtraParams ) <# .SYNOPSIS Not required. .DESCRIPTION This provider does not require calling this function to commit changes to DNS records. .PARAMETER ExtraParams This parameter can be ignored and is only used to prevent errors when splatting with more parameters than this function supports. #> } ############################ # Helper Functions ############################ # API Docs: https://dns.hetzner.com/api-docs/ Function Find-HetznerZone { [CmdletBinding()] param( [Parameter(Mandatory, Position=0)] [string]$RecordName, [Parameter(Mandatory, Position=1)] [hashtable]$RestParameters ) # setup a module variable to cache the record to zone mapping # so it's quicker to find later if (!$script:HetznerRecordZones) { $script:HetznerRecordZones = @{} } # check for the record in the cache if ($script:HetznerRecordZones.ContainsKey($RecordName)) { Write-Debug "Result from Cache $($script:HetznerRecordZones.$RecordName.Name)" return $script:HetznerRecordZones.$RecordName } # first, get all Zones, Zone to get is identified by 'ZoneID'. try { $response = Invoke-RestMethod -Uri "https://dns.hetzner.com/api/v1/zones" ` @RestParameters @Script:UseBasic -EA Stop } catch { throw } # We need to find the closest/deepest # sub-zone that would hold the record rather than just adding it to the apex. So for something # like _acme-challenge.site1.sub1.sub2.example.com, we'd look for zone matches in the following # order: # - site1.sub1.sub2.example.com # - sub1.sub2.example.com # - sub2.example.com # - example.com $pieces = $RecordName.Split('.') for ($i=0; $i -lt ($pieces.Count-1); $i++) { $zoneTest = $pieces[$i..($pieces.Count-1)] -join '.' Write-Debug "Checking $zoneTest" try { $query = "https://dns.hetzner.com/api/v1/zones?name=$zoneTest" Write-Debug "GET $query" $response = Invoke-RestMethod $query @RestParameters @Script:UseBasic -EA Stop } catch { if (404 -eq $_.Exception.Response.StatusCode) { Write-Debug "Zone $zoneTest does not exist" continue } else { throw } } Write-Debug "Zone $zoneTest found" $zone = $response.zones | Select-Object -First 1 id,name $script:HetznerRecordZones.$RecordName = $zone return $zone } return $null } |