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package integration
import (
"context"
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"fmt"
"log/slog"
"net"
"net/http"
"strings"
"testing"
"github.com/caddyserver/caddy/v2"
"github.com/caddyserver/caddy/v2/caddytest"
"github.com/mholt/acmez/v3"
"github.com/mholt/acmez/v3/acme"
smallstepacme "github.com/smallstep/certificates/acme"
"go.uber.org/zap"
"go.uber.org/zap/exp/zapslog"
)
const acmeChallengePort = 9081
// Test the basic functionality of Caddy's ACME server
func TestACMEServerWithDefaults(t *testing.T) {
ctx := context.Background()
logger, err := zap.NewDevelopment()
if err != nil {
t.Error(err)
return
}
tester := caddytest.NewTester(t)
tester.InitServer(`
{
skip_install_trust
admin localhost:2999
http_port 9080
https_port 9443
local_certs
}
acme.localhost {
acme_server
}
`, "caddyfile")
client := acmez.Client{
Client: &acme.Client{
Directory: "https://acme.localhost:9443/acme/local/directory",
HTTPClient: tester.Client,
Logger: slog.New(zapslog.NewHandler(logger.Core())),
},
ChallengeSolvers: map[string]acmez.Solver{
acme.ChallengeTypeHTTP01: &naiveHTTPSolver{logger: logger},
},
}
accountPrivateKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
t.Errorf("generating account key: %v", err)
}
account := acme.Account{
Contact: []string{"mailto:you@example.com"},
TermsOfServiceAgreed: true,
PrivateKey: accountPrivateKey,
}
account, err = client.NewAccount(ctx, account)
if err != nil {
t.Errorf("new account: %v", err)
return
}
// Every certificate needs a key.
certPrivateKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
t.Errorf("generating certificate key: %v", err)
return
}
certs, err := client.ObtainCertificateForSANs(ctx, account, certPrivateKey, []string{"localhost"})
if err != nil {
t.Errorf("obtaining certificate: %v", err)
return
}
// ACME servers should usually give you the entire certificate chain
// in PEM format, and sometimes even alternate chains! It's up to you
// which one(s) to store and use, but whatever you do, be sure to
// store the certificate and key somewhere safe and secure, i.e. don't
// lose them!
for _, cert := range certs {
t.Logf("Certificate %q:\n%s\n\n", cert.URL, cert.ChainPEM)
}
}
func TestACMEServerWithMismatchedChallenges(t *testing.T) {
ctx := context.Background()
logger := caddy.Log().Named("acmez")
tester := caddytest.NewTester(t)
tester.InitServer(`
{
skip_install_trust
admin localhost:2999
http_port 9080
https_port 9443
local_certs
}
acme.localhost {
acme_server {
challenges tls-alpn-01
}
}
`, "caddyfile")
client := acmez.Client{
Client: &acme.Client{
Directory: "https://acme.localhost:9443/acme/local/directory",
HTTPClient: tester.Client,
Logger: slog.New(zapslog.NewHandler(logger.Core())),
},
ChallengeSolvers: map[string]acmez.Solver{
acme.ChallengeTypeHTTP01: &naiveHTTPSolver{logger: logger},
},
}
accountPrivateKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
t.Errorf("generating account key: %v", err)
}
account := acme.Account{
Contact: []string{"mailto:you@example.com"},
TermsOfServiceAgreed: true,
PrivateKey: accountPrivateKey,
}
account, err = client.NewAccount(ctx, account)
if err != nil {
t.Errorf("new account: %v", err)
return
}
// Every certificate needs a key.
certPrivateKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
t.Errorf("generating certificate key: %v", err)
return
}
certs, err := client.ObtainCertificateForSANs(ctx, account, certPrivateKey, []string{"localhost"})
if len(certs) > 0 {
t.Errorf("expected '0' certificates, but received '%d'", len(certs))
}
if err == nil {
t.Error("expected errors, but received none")
}
const expectedErrMsg = "no solvers available for remaining challenges (configured=[http-01] offered=[tls-alpn-01] remaining=[tls-alpn-01])"
if !strings.Contains(err.Error(), expectedErrMsg) {
t.Errorf(`received error message does not match expectation: expected="%s" received="%s"`, expectedErrMsg, err.Error())
}
}
// naiveHTTPSolver is a no-op acmez.Solver for example purposes only.
type naiveHTTPSolver struct {
srv *http.Server
logger *zap.Logger
}
func (s *naiveHTTPSolver) Present(ctx context.Context, challenge acme.Challenge) error {
smallstepacme.InsecurePortHTTP01 = acmeChallengePort
s.srv = &http.Server{
Addr: fmt.Sprintf(":%d", acmeChallengePort),
Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
host, _, err := net.SplitHostPort(r.Host)
if err != nil {
host = r.Host
}
s.logger.Info("received request on challenge server", zap.String("path", r.URL.Path))
if r.Method == "GET" && r.URL.Path == challenge.HTTP01ResourcePath() && strings.EqualFold(host, challenge.Identifier.Value) {
w.Header().Add("Content-Type", "text/plain")
w.Write([]byte(challenge.KeyAuthorization))
r.Close = true
s.logger.Info("served key authentication",
zap.String("identifier", challenge.Identifier.Value),
zap.String("challenge", "http-01"),
zap.String("remote", r.RemoteAddr),
)
}
}),
}
l, err := net.Listen("tcp", fmt.Sprintf(":%d", acmeChallengePort))
if err != nil {
return err
}
s.logger.Info("present challenge", zap.Any("challenge", challenge))
go s.srv.Serve(l)
return nil
}
func (s naiveHTTPSolver) CleanUp(ctx context.Context, challenge acme.Challenge) error {
smallstepacme.InsecurePortHTTP01 = 0
s.logger.Info("cleanup", zap.Any("challenge", challenge))
if s.srv != nil {
s.srv.Close()
}
return nil
}
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