Plugins/Dynu.ps1
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function Get-CurrentPluginType { 'dns-01' } function Add-DnsTxt { [CmdletBinding()] param( [Parameter(Mandatory,Position=0)] [string]$RecordName, [Parameter(Mandatory,Position=1)] [string]$TxtValue, [Parameter(Mandatory,Position=2)] [string]$DynuClientID, [Parameter(Mandatory,Position=3)] [string]$DynuSecret, [Parameter(ValueFromRemainingArguments)] $ExtraParams ) $apiBase = 'https://api.dynu.com/v2' $RecordName = $RecordName.ToLower() # authenticate $token = Get-DynuAccessToken $DynuClientID $DynuSecret $headers = @{ Accept = 'application/json' Authorization = "Bearer $token" } # The v2 API has a super convenient method for querying a record entirely based on hostname # so we don't have to deal with the typical find zone id rigamarole. try { $response = Invoke-RestMethod "$apiBase/dns/record/$($RecordName)?recordType=TXT" ` -Headers $headers @script:UseBasic } catch { throw } if ($response.dnsRecords -and $TxtValue -in $response.dnsRecords.textData) { # nothing to do Write-Debug "Record $RecordName already contains $TxtValue. Nothing to do." } else { # if there's at least one record in the response, we can get the zone ID from it, otherwise # we need to query for the zone ID in before we can add the new record if ($response.dnsRecords.Count -gt 0) { $zoneID = $response.dnsRecords[0].domainId $recNode = $response.dnsRecords[0].nodeName } else { # query the zone info try { $zoneResp = Invoke-RestMethod "$apiBase/dns/getroot/$RecordName" ` -Headers $headers @script:UseBasic } catch { throw } if ($zoneResp -and $zoneResp.id) { $zoneID = $zoneResp.id $recNode = $zoneResp.node } else { throw "No zone info returned for $RecordName from Dynu" } } # now that we have the zone ID, we can add the new record $bodyJson = @{ nodeName = $recNode recordType = 'TXT' textData = $TxtValue state = $true } | ConvertTo-Json -Compress try { Write-Verbose "Adding a TXT record for $RecordName with value $TxtValue" Invoke-RestMethod "$apiBase/dns/$zoneID/record" -Method Post -Body $bodyJson ` -Headers $headers -ContentType 'application/json' @script:UseBasic | Out-Null } catch { throw } } <# .SYNOPSIS Add a DNS TXT record to Dynu .DESCRIPTION Adds the TXT record to the Dynu zone .PARAMETER RecordName The fully qualified name of the TXT record. .PARAMETER TxtValue The value of the TXT record. .PARAMETER DynuClientID The API Client ID for the Dynu account. Can be found at https://www.dynu.com/en-US/ControlPanel/APICredentials .PARAMETER DynuSecret The API Secret for the Dynu account. Can be found at https://www.dynu.com/en-US/ControlPanel/APICredentials .PARAMETER ExtraParams This parameter can be ignored and is only used to prevent errors when splatting with more parameters than this function supports. .EXAMPLE Add-DnsTxt '_acme-challenge.example.com' 'txt-value' 'client-id' 'client-secret' Adds a TXT record for the specified domain with the specified value. #> } function Remove-DnsTxt { [CmdletBinding()] param( [Parameter(Mandatory,Position=0)] [string]$RecordName, [Parameter(Mandatory,Position=1)] [string]$TxtValue, [Parameter(Mandatory,Position=2)] [string]$DynuClientID, [Parameter(Mandatory,Position=3)] [string]$DynuSecret, [Parameter(ValueFromRemainingArguments)] $ExtraParams ) $apiBase = 'https://api.dynu.com/v2' $RecordName = $RecordName.ToLower() # authenticate $token = Get-DynuAccessToken $DynuClientID $DynuSecret $headers = @{ Accept = 'application/json' Authorization = "Bearer $token" } # The v2 API has a super convenient method for querying a record entirely based on hostname # so we don't have to deal with the typical find zone id rigamarole. try { $response = Invoke-RestMethod "$apiBase/dns/record/$($RecordName)?recordType=TXT" ` -Headers $headers @script:UseBasic } catch { throw } if ($response.dnsRecords -and $TxtValue -in $response.dnsRecords.textData) { # grab the record and delete it $rec = $response.dnsRecords | Where-Object { $_.textData -eq $TxtValue } try { Write-Verbose "Deleting $RecordName with value $TxtValue" Invoke-RestMethod "$apiBase/dns/$($rec.domainId)/record/$($rec.id)" -Method Delete ` -Headers $headers @script:UseBasic | Out-Null } catch { throw } } else { # nothing to do Write-Debug "Record $RecordName with value $TxtValue doesn't exist. Nothing to do." } <# .SYNOPSIS Remove a DNS TXT record from Dynu .DESCRIPTION Removes the TXT record from the Dynu zone .PARAMETER RecordName The fully qualified name of the TXT record. .PARAMETER TxtValue The value of the TXT record. .PARAMETER DynuClientID The API Client ID for the Dynu account. Can be found at https://www.dynu.com/en-US/ControlPanel/APICredentials .PARAMETER DynuSecret The API Secret for the Dynu account. Can be found at https://www.dynu.com/en-US/ControlPanel/APICredentials .PARAMETER ExtraParams This parameter can be ignored and is only used to prevent errors when splatting with more parameters than this function supports. .EXAMPLE Remove-DnsTxt '_acme-challenge.example.com' 'txt-value' 'client-id' 'client-secret' Removes a TXT record for the specified domain with the specified value. #> } function Save-DnsTxt { [CmdletBinding()] param( [Parameter(ValueFromRemainingArguments)] $ExtraParams ) <# .SYNOPSIS Not required .DESCRIPTION This provider does not require calling this function to save DNS records. .PARAMETER ExtraParams This parameter can be ignored and is only used to prevent errors when splatting with more parameters than this function supports. #> } ############################ # Helper Functions ############################ # API Docs # https://www.dynu.com/en-US/Resources/API function Get-DynuAccessToken { [CmdletBinding()] param( [Parameter(Mandatory, Position = 0)] [string]$DynuClientID, [Parameter(Mandatory, Position = 1)] [string]$DynuSecret ) if ($script:DynuAccessToken -and ($script:DynuAccessToken.Expiry -lt (Get-DateTimeOffsetNow))) { return $script:DynuAccessToken.AccessToken } # Dynu's web server requires the credentials to be passed on the first call, so we can't just # use the -Credential parameter because it only adds credentials after passing nothing and getting # an auth challenge response. $encodedCreds = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes("${DynuClientID}:${DynuSecret}")) $headers = @{ Accept = 'application/json' Authorization = "Basic $encodedCreds" } try { $response = Invoke-RestMethod -Uri "https://api.dynu.com/v2/oauth2/token" -Headers $headers @script:UseBasic } catch { throw } if (-not $response.access_token) { Write-Debug ($response | ConvertTo-Json) throw "Access token not found in OAuth2 response from Dynu" } $script:DynuAccessToken = @{ AccessToken = $response.access_token Expiry = (Get-DateTimeOffsetNow).AddSeconds($response.expires_in - 300) } return $script:DynuAccessToken.AccessToken } |