98 lines
2.3 KiB
Go
98 lines
2.3 KiB
Go
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// Package ns1 implements a DNS provider for solving the DNS-01 challenge
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// using NS1 DNS.
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package ns1
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import (
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"fmt"
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"net/http"
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"os"
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"time"
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"github.com/xenolf/lego/acme"
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"gopkg.in/ns1/ns1-go.v2/rest"
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"gopkg.in/ns1/ns1-go.v2/rest/model/dns"
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)
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// DNSProvider is an implementation of the acme.ChallengeProvider interface.
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type DNSProvider struct {
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client *rest.Client
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}
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// NewDNSProvider returns a DNSProvider instance configured for NS1.
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// Credentials must be passed in the environment variables: NS1_API_KEY.
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func NewDNSProvider() (*DNSProvider, error) {
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key := os.Getenv("NS1_API_KEY")
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if key == "" {
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return nil, fmt.Errorf("NS1 credentials missing")
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}
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return NewDNSProviderCredentials(key)
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}
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// NewDNSProviderCredentials uses the supplied credentials to return a
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// DNSProvider instance configured for NS1.
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func NewDNSProviderCredentials(key string) (*DNSProvider, error) {
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if key == "" {
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return nil, fmt.Errorf("NS1 credentials missing")
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}
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httpClient := &http.Client{Timeout: time.Second * 10}
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client := rest.NewClient(httpClient, rest.SetAPIKey(key))
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return &DNSProvider{client}, nil
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}
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// Present creates a TXT record to fulfil the dns-01 challenge.
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func (c *DNSProvider) Present(domain, token, keyAuth string) error {
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fqdn, value, ttl := acme.DNS01Record(domain, keyAuth)
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zone, err := c.getHostedZone(domain)
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if err != nil {
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return err
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}
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record := c.newTxtRecord(zone, fqdn, value, ttl)
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_, err = c.client.Records.Create(record)
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if err != nil && err != rest.ErrRecordExists {
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return err
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}
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return nil
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}
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// CleanUp removes the TXT record matching the specified parameters.
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func (c *DNSProvider) CleanUp(domain, token, keyAuth string) error {
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fqdn, _, _ := acme.DNS01Record(domain, keyAuth)
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zone, err := c.getHostedZone(domain)
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if err != nil {
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return err
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}
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name := acme.UnFqdn(fqdn)
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_, err = c.client.Records.Delete(zone.Zone, name, "TXT")
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return err
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}
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func (c *DNSProvider) getHostedZone(domain string) (*dns.Zone, error) {
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zone, _, err := c.client.Zones.Get(domain)
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if err != nil {
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return nil, err
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}
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return zone, nil
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}
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func (c *DNSProvider) newTxtRecord(zone *dns.Zone, fqdn, value string, ttl int) *dns.Record {
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name := acme.UnFqdn(fqdn)
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return &dns.Record{
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Type: "TXT",
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Zone: zone.Zone,
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Domain: name,
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TTL: ttl,
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Answers: []*dns.Answer{
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{Rdata: []string{value}},
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},
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}
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}
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