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package main
import (
"context"
"io"
"net"
"net/http"
"strings"
"github.com/lxc/incus/v6/internal/server/acme"
"github.com/lxc/incus/v6/internal/server/cluster"
"github.com/lxc/incus/v6/internal/server/db/operationtype"
"github.com/lxc/incus/v6/internal/server/operations"
"github.com/lxc/incus/v6/internal/server/response"
"github.com/lxc/incus/v6/internal/server/task"
"github.com/lxc/incus/v6/internal/util"
"github.com/lxc/incus/v6/shared/api"
"github.com/lxc/incus/v6/shared/logger"
localtls "github.com/lxc/incus/v6/shared/tls"
)
var apiACME = []APIEndpoint{
acmeChallengeCmd,
}
var acmeChallengeCmd = APIEndpoint{
Path: ".well-known/acme-challenge/{token}",
Get: APIEndpointAction{Handler: acmeProvideChallenge, AllowUntrusted: true},
}
func acmeProvideChallenge(d *Daemon, r *http.Request) response.Response {
s := d.State()
// Redirect to the leader when clustered.
if s.ServerClustered {
leader, err := s.Cluster.LeaderAddress()
if err != nil {
return response.SmartError(err)
}
// This gives me the correct value
clusterAddress := s.LocalConfig.ClusterAddress()
if clusterAddress != "" && clusterAddress != leader {
// Forward the request to the leader
client, err := cluster.Connect(leader, s.Endpoints.NetworkCert(), s.ServerCert(), r, true)
if err != nil {
return response.SmartError(err)
}
return response.ForwardedResponse(client, r)
}
}
// Forward to the lego listener.
addr := s.GlobalConfig.ACMEHTTP()
if strings.HasPrefix(addr, ":") {
addr = "127.0.0.1" + addr
}
domain, _, _, _, _ := s.GlobalConfig.ACME()
client := http.Client{}
client.Transport = &http.Transport{
DialContext: func(_ context.Context, _, _ string) (net.Conn, error) {
return net.Dial("tcp", addr)
},
}
req, err := http.NewRequest("GET", "http://"+domain+r.URL.String(), nil)
if err != nil {
return response.InternalError(err)
}
req.Header = r.Header
resp, err := client.Do(req)
if err != nil {
return response.InternalError(err)
}
defer resp.Body.Close()
challenge, err := io.ReadAll(resp.Body)
if err != nil {
return response.InternalError(err)
}
return response.ManualResponse(func(w http.ResponseWriter) error {
w.Header().Set("Content-Type", "text/plain")
_, err = w.Write(challenge)
if err != nil {
return err
}
return nil
})
}
func autoRenewCertificate(ctx context.Context, d *Daemon, force bool) error {
s := d.State()
domain, email, caURL, agreeToS, challengeType := s.GlobalConfig.ACME()
if domain == "" || email == "" || !agreeToS || challengeType == "" {
return nil
}
// If we are clustered, let the leader handle the certificate renewal.
if s.ServerClustered {
leader, err := s.Cluster.LeaderAddress()
if err != nil {
return err
}
// Figure out our own cluster address.
clusterAddress := s.LocalConfig.ClusterAddress()
if clusterAddress != leader {
return nil
}
}
opRun := func(op *operations.Operation) error {
newCert, err := acme.UpdateCertificate(s, challengeType, s.ServerClustered, domain, email, caURL, force)
if err != nil {
return err
}
// If cert is nil, there's no need to update it as it's still valid.
if newCert == nil {
return nil
}
if s.ServerClustered {
req := api.ClusterCertificatePut{
ClusterCertificate: string(newCert.Certificate),
ClusterCertificateKey: string(newCert.PrivateKey),
}
err = updateClusterCertificate(s.ShutdownCtx, s, d.gateway, nil, req)
if err != nil {
return err
}
return nil
}
cert, err := localtls.KeyPairFromRaw(newCert.Certificate, newCert.PrivateKey)
if err != nil {
return err
}
s.Endpoints.NetworkUpdateCert(cert)
err = util.WriteCert(s.OS.VarDir, "server", newCert.Certificate, newCert.PrivateKey, nil)
if err != nil {
return err
}
return nil
}
op, err := operations.OperationCreate(s, "", operations.OperationClassTask, operationtype.RenewServerCertificate, nil, nil, opRun, nil, nil, nil)
if err != nil {
logger.Error("Failed creating renew server certificate operation", logger.Ctx{"err": err})
return err
}
logger.Info("Starting automatic server certificate renewal check")
err = op.Start()
if err != nil {
logger.Error("Failed starting renew server certificate operation", logger.Ctx{"err": err})
return err
}
err = op.Wait(ctx)
if err != nil {
logger.Error("Failed server certificate renewal", logger.Ctx{"err": err})
return err
}
logger.Info("Done automatic server certificate renewal check")
return nil
}
func autoRenewCertificateTask(d *Daemon) (task.Func, task.Schedule) {
f := func(ctx context.Context) {
_ = autoRenewCertificate(ctx, d, false)
}
return f, task.Daily()
}
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