185 lines
5.5 KiB
Go
185 lines
5.5 KiB
Go
package oraclecloud
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import (
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"context"
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"errors"
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"fmt"
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"net/http"
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"time"
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"github.com/go-acme/lego/v3/challenge/dns01"
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"github.com/go-acme/lego/v3/platform/config/env"
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"github.com/oracle/oci-go-sdk/common"
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"github.com/oracle/oci-go-sdk/dns"
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)
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// Config is used to configure the creation of the DNSProvider
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type Config struct {
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CompartmentID string
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OCIConfigProvider common.ConfigurationProvider
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PropagationTimeout time.Duration
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PollingInterval time.Duration
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TTL int
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HTTPClient *http.Client
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}
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// NewDefaultConfig returns a default configuration for the DNSProvider
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func NewDefaultConfig() *Config {
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return &Config{
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TTL: env.GetOrDefaultInt("OCI_TTL", dns01.DefaultTTL),
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PropagationTimeout: env.GetOrDefaultSecond("OCI_PROPAGATION_TIMEOUT", dns01.DefaultPropagationTimeout),
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PollingInterval: env.GetOrDefaultSecond("OCI_POLLING_INTERVAL", dns01.DefaultPollingInterval),
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HTTPClient: &http.Client{
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Timeout: env.GetOrDefaultSecond("OCI_HTTP_TIMEOUT", 60*time.Second),
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},
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}
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}
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// DNSProvider is an implementation of the challenge.Provider interface.
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type DNSProvider struct {
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client *dns.DnsClient
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config *Config
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}
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// NewDNSProvider returns a DNSProvider instance configured for OracleCloud.
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func NewDNSProvider() (*DNSProvider, error) {
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values, err := env.Get(ociPrivkey, ociTenancyOCID, ociUserOCID, ociPubkeyFingerprint, ociRegion, "OCI_COMPARTMENT_OCID")
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if err != nil {
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return nil, fmt.Errorf("oraclecloud: %w", err)
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}
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config := NewDefaultConfig()
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config.CompartmentID = values["OCI_COMPARTMENT_OCID"]
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config.OCIConfigProvider = newConfigProvider(values)
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return NewDNSProviderConfig(config)
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}
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// NewDNSProviderConfig return a DNSProvider instance configured for OracleCloud.
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func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
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if config == nil {
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return nil, errors.New("oraclecloud: the configuration of the DNS provider is nil")
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}
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if config.CompartmentID == "" {
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return nil, errors.New("oraclecloud: CompartmentID is missing")
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}
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if config.OCIConfigProvider == nil {
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return nil, errors.New("oraclecloud: OCIConfigProvider is missing")
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}
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client, err := dns.NewDnsClientWithConfigurationProvider(config.OCIConfigProvider)
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if err != nil {
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return nil, fmt.Errorf("oraclecloud: %w", err)
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}
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if config.HTTPClient != nil {
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client.HTTPClient = config.HTTPClient
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}
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return &DNSProvider{client: &client, config: config}, nil
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}
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// Present creates a TXT record to fulfill the dns-01 challenge
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func (d *DNSProvider) Present(domain, token, keyAuth string) error {
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fqdn, value := dns01.GetRecord(domain, keyAuth)
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zoneNameOrID, err1 := dns01.FindZoneByFqdn(dns01.ToFqdn(domain))
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if err1 != nil {
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return fmt.Errorf("oraclecloud: could not find zone for domain %q and fqdn %q : %w", domain, fqdn, err1)
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}
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// generate request to dns.PatchDomainRecordsRequest
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recordOperation := dns.RecordOperation{
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Domain: common.String(dns01.UnFqdn(fqdn)),
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Rdata: common.String(value),
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Rtype: common.String("TXT"),
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Ttl: common.Int(d.config.TTL),
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IsProtected: common.Bool(false),
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}
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request := dns.PatchDomainRecordsRequest{
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CompartmentId: common.String(d.config.CompartmentID),
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ZoneNameOrId: common.String(zoneNameOrID),
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Domain: common.String(dns01.UnFqdn(fqdn)),
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PatchDomainRecordsDetails: dns.PatchDomainRecordsDetails{
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Items: []dns.RecordOperation{recordOperation},
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},
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}
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_, err := d.client.PatchDomainRecords(context.Background(), request)
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if err != nil {
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return fmt.Errorf("oraclecloud: %w", 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 (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
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fqdn, value := dns01.GetRecord(domain, keyAuth)
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zoneNameOrID, err1 := dns01.FindZoneByFqdn(dns01.ToFqdn(domain))
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if err1 != nil {
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return fmt.Errorf("oraclecloud: could not find zone for domain %q and fqdn %q : %w", domain, fqdn, err1)
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}
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// search to TXT record's hash to delete
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getRequest := dns.GetDomainRecordsRequest{
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ZoneNameOrId: common.String(zoneNameOrID),
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Domain: common.String(dns01.UnFqdn(fqdn)),
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CompartmentId: common.String(d.config.CompartmentID),
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Rtype: common.String("TXT"),
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}
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ctx := context.Background()
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domainRecords, err := d.client.GetDomainRecords(ctx, getRequest)
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if err != nil {
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return fmt.Errorf("oraclecloud: %w", err)
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}
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if *domainRecords.OpcTotalItems == 0 {
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return errors.New("oraclecloud: no record to CleanUp")
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}
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var deleteHash *string
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for _, record := range domainRecords.RecordCollection.Items {
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if record.Rdata != nil && *record.Rdata == `"`+value+`"` {
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deleteHash = record.RecordHash
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break
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}
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}
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if deleteHash == nil {
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return errors.New("oraclecloud: no record to CleanUp")
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}
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recordOperation := dns.RecordOperation{
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RecordHash: deleteHash,
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Operation: dns.RecordOperationOperationRemove,
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}
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patchRequest := dns.PatchDomainRecordsRequest{
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ZoneNameOrId: common.String(zoneNameOrID),
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Domain: common.String(dns01.UnFqdn(fqdn)),
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PatchDomainRecordsDetails: dns.PatchDomainRecordsDetails{
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Items: []dns.RecordOperation{recordOperation},
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},
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CompartmentId: common.String(d.config.CompartmentID),
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}
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_, err = d.client.PatchDomainRecords(ctx, patchRequest)
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if err != nil {
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return fmt.Errorf("oraclecloud: %w", err)
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}
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return nil
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}
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// Timeout returns the timeout and interval to use when checking for DNS propagation.
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// Adjusting here to cope with spikes in propagation times.
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func (d *DNSProvider) Timeout() (timeout, interval time.Duration) {
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return d.config.PropagationTimeout, d.config.PollingInterval
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}
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