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acmedns: fix CNAME support (#1847)

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Ludovic Fernandez 2023-02-24 09:59:23 +01:00 committed by GitHub
parent 1e2793f9ec
commit 56fda1abd8
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1 changed files with 20 additions and 12 deletions
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30
providers/dns/acmedns/acmedns.go
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@ -102,21 +102,25 @@ func (e ErrCNAMERequired) Error() string {
// one will be created and registered with the ACME DNS server and an ErrCNAMERequired error is returned.
// This will halt issuance and indicate to the user that a one-time manual setup is required for the domain.
func (d *DNSProvider) Present(domain, _, keyAuth string) error {
// Compute the challenge response FQDN and TXT value for the domain based
// on the keyAuth.
// Compute the challenge response FQDN and TXT value for the domain based on the keyAuth.
fqdn, value := dns01.GetRecord(domain, keyAuth)
// Check if credentials were previously saved for this domain.
// TODO(ldez) replace domain by FQDN to follow CNAME.
account, err := d.storage.Fetch(domain)
// Errors other than goacmeDNS.ErrDomainNotFound are unexpected.
if err != nil && !errors.Is(err, goacmedns.ErrDomainNotFound) {
return err
effectiveDomain := domain
if isCNAME(domain, fqdn) {
effectiveDomain = fqdn
}
// Check if credentials were previously saved for this domain.
account, err := d.storage.Fetch(effectiveDomain)
if err != nil {
if errors.Is(err, goacmedns.ErrDomainNotFound) {
// The account did not exist. Create a new one and return an error
// indicating the required one-time manual CNAME setup.
return d.register(domain, fqdn)
// The account did not exist.
// Create a new one and return an error indicating the required one-time manual CNAME setup.
return d.register(effectiveDomain, fqdn)
}
// Errors other than goacmeDNS.ErrDomainNotFound are unexpected.
return err
}
// Update the acme-dns TXT record.
@ -161,3 +165,7 @@ func (d *DNSProvider) register(domain, fqdn string) error {
Target: newAcct.FullDomain,
}
}
func isCNAME(domain, fqdn string) bool {
return fmt.Sprintf("_acme-challenge.%s.", domain) != fqdn
}