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Support OverrideDomain is DNS01Solver #160

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merged 3 commits into from Mar 7, 2022
Merged

Support OverrideDomain is DNS01Solver #160

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631af55
Add OverrideDomain option to DNS01Solver
crccw Feb 20, 2022
ba5037f
Update solvers.go
mholt Mar 5, 2022
4be5af5
Only check the authoritative NS when OverrideDomain is set
crccw Mar 7, 2022
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17 changes: 16 additions & 1 deletion solvers.go
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Expand Up @@ -252,13 +252,21 @@ type DNS01Solver struct {
// Preferred DNS resolver(s) to use when doing DNS lookups.
Resolvers []string

// Override the domain to set the TXT record on. This is
// to delegate the challenge to a different domain. Note
// that the solver doesn't follow CNAME/NS record.
OverrideDomain string

txtRecords map[string]dnsPresentMemory // keyed by domain name
txtRecordsMu sync.Mutex
}

// Present creates the DNS TXT record for the given ACME challenge.
func (s *DNS01Solver) Present(ctx context.Context, challenge acme.Challenge) error {
dnsName := challenge.DNS01TXTRecordName()
if s.OverrideDomain != "" {
dnsName = s.OverrideDomain
}
keyAuth := challenge.DNS01KeyAuthorization()

// multiple identifiers can have the same ACME challenge
Expand Down Expand Up @@ -304,6 +312,9 @@ func (s *DNS01Solver) Present(ctx context.Context, challenge acme.Challenge) err
// timeout, whichever is first.
func (s *DNS01Solver) Wait(ctx context.Context, challenge acme.Challenge) error {
dnsName := challenge.DNS01TXTRecordName()
if s.OverrideDomain != "" {
dnsName = s.OverrideDomain
}
keyAuth := challenge.DNS01KeyAuthorization()

timeout := s.PropagationTimeout
Expand All @@ -323,7 +334,11 @@ func (s *DNS01Solver) Wait(ctx context.Context, challenge acme.Challenge) error
return ctx.Err()
}
var ready bool
ready, err = checkDNSPropagation(dnsName, keyAuth, resolvers)
if s.OverrideDomain == "" {
ready, err = checkDNSPropagation(dnsName, keyAuth, resolvers)
} else {
ready, err = checkAuthoritativeNss(dnsName, keyAuth, resolvers)
}
if err != nil {
return fmt.Errorf("checking DNS propagation of %s: %w", dnsName, err)
}
Expand Down