CertificateObject: Enable auto-reload for cacert & Add buildChain & Fixes (#3607)

common/protocol/tls/cert/cert.go

@@ -149,10 +149,6 @@ func Generate(parent *Certificate, opts ...Option) (*Certificate, error) {
 		BasicConstraintsValid: true,
 	}
 
-	for _, opt := range opts {
-		opt(template)
-	}
-
 	parentCert := template
 	if parent != nil {
 		pCert, err := x509.ParseCertificate(parent.Certificate)
@@ -162,6 +158,17 @@ func Generate(parent *Certificate, opts ...Option) (*Certificate, error) {
 		parentCert = pCert
 	}
 
+	if parentCert.NotAfter.Before(template.NotAfter) {
+		template.NotAfter = parentCert.NotAfter
+	}
+	if parentCert.NotBefore.After(template.NotBefore) {
+		template.NotBefore = parentCert.NotBefore
+	}
+
+	for _, opt := range opts {
+		opt(template)
+	}
+
 	derBytes, err := x509.CreateCertificate(rand.Reader, template, parentCert, publicKey(selfKey), parentKey)
 	if err != nil {
 		return nil, errors.New("failed to create certificate").Base(err)

infra/conf/transport_internet.go

@@ -385,6 +385,7 @@ type TLSCertConfig struct {
 	Usage          string   `json:"usage"`
 	OcspStapling   uint64   `json:"ocspStapling"`
 	OneTimeLoading bool     `json:"oneTimeLoading"`
+	BuildChain     bool     `json:"buildChain"`
 }
 
 // Build implements Buildable.
@@ -423,6 +424,7 @@ func (c *TLSCertConfig) Build() (*tls.Certificate, error) {
 		certificate.OneTimeLoading = c.OneTimeLoading
 	}
 	certificate.OcspStapling = c.OcspStapling
+	certificate.BuildChain = c.BuildChain
 
 	return certificate, nil
 }

transport/internet/tls/config.go

@@ -10,6 +10,7 @@ import (
 	"strings"
 	"sync"
 	"time"
+	"bytes"
 
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
@@ -50,72 +51,84 @@ func (c *Config) BuildCertificates() []*tls.Certificate {
 		if entry.Usage != Certificate_ENCIPHERMENT {
 			continue
 		}
-		keyPair, err := tls.X509KeyPair(entry.Certificate, entry.Key)
-		if err != nil {
-			errors.LogWarningInner(context.Background(), err, "ignoring invalid X509 key pair")
-			continue
+		getX509KeyPair := func() *tls.Certificate {
+			keyPair, err := tls.X509KeyPair(entry.Certificate, entry.Key)
+			if err != nil {
+				errors.LogWarningInner(context.Background(), err, "ignoring invalid X509 key pair")
+				return nil
+			}
+			keyPair.Leaf, err = x509.ParseCertificate(keyPair.Certificate[0])
+			if err != nil {
+				errors.LogWarningInner(context.Background(), err, "ignoring invalid certificate")
+				return nil
+			}
+			return &keyPair
 		}
-		keyPair.Leaf, err = x509.ParseCertificate(keyPair.Certificate[0])
-		if err != nil {
-			errors.LogWarningInner(context.Background(), err, "ignoring invalid certificate")
+		if keyPair := getX509KeyPair(); keyPair != nil {
+			certs = append(certs, keyPair)
+		} else {
 			continue
 		}
-		certs = append(certs, &keyPair)
-		if !entry.OneTimeLoading {
-			var isOcspstapling bool
-			hotReloadCertInterval := uint64(3600)
-			if entry.OcspStapling != 0 {
-				hotReloadCertInterval = entry.OcspStapling
-				isOcspstapling = true
+		index := len(certs) - 1
+		setupOcspTicker(entry, func(isReloaded, isOcspstapling bool){
+			cert := certs[index]
+			if isReloaded {
+				if newKeyPair := getX509KeyPair(); newKeyPair != nil {
+					cert = newKeyPair
+				} else {
+					return
+				}
 			}
-			index := len(certs) - 1
-			go func(entry *Certificate, cert *tls.Certificate, index int) {
-				t := time.NewTicker(time.Duration(hotReloadCertInterval) * time.Second)
-				for {
-					if entry.CertificatePath != "" && entry.KeyPath != "" {
-						newCert, err := filesystem.ReadFile(entry.CertificatePath)
-						if err != nil {
-							errors.LogErrorInner(context.Background(), err, "failed to parse certificate")
-							<-t.C
-							continue
-						}
-						newKey, err := filesystem.ReadFile(entry.KeyPath)
-						if err != nil {
-							errors.LogErrorInner(context.Background(), err, "failed to parse key")
-							<-t.C
-							continue
-						}
-						if string(newCert) != string(entry.Certificate) && string(newKey) != string(entry.Key) {
-							newKeyPair, err := tls.X509KeyPair(newCert, newKey)
-							if err != nil {
-								errors.LogErrorInner(context.Background(), err, "ignoring invalid X509 key pair")
-								<-t.C
-								continue
-							}
-							if newKeyPair.Leaf, err = x509.ParseCertificate(newKeyPair.Certificate[0]); err != nil {
-								errors.LogErrorInner(context.Background(), err, "ignoring invalid certificate")
-								<-t.C
-								continue
-							}
-							cert = &newKeyPair
-						}
-					}
-					if isOcspstapling {
-						if newOCSPData, err := ocsp.GetOCSPForCert(cert.Certificate); err != nil {
-							errors.LogWarningInner(context.Background(), err, "ignoring invalid OCSP")
-						} else if string(newOCSPData) != string(cert.OCSPStaple) {
-							cert.OCSPStaple = newOCSPData
-						}
-					}
-					certs[index] = cert
-					<-t.C
+			if isOcspstapling {
+				if newOCSPData, err := ocsp.GetOCSPForCert(cert.Certificate); err != nil {
+					errors.LogWarningInner(context.Background(), err, "ignoring invalid OCSP")
+				} else if string(newOCSPData) != string(cert.OCSPStaple) {
+					cert.OCSPStaple = newOCSPData
 				}
-			}(entry, certs[index], index)
-		}
+			}
+			certs[index] = cert
+		})
 	}
 	return certs
 }
 
+func setupOcspTicker(entry *Certificate, callback func(isReloaded, isOcspstapling bool)) {
+	go func() {
+		if entry.OneTimeLoading {
+			return
+		}
+		var isOcspstapling bool
+		hotReloadCertInterval := uint64(3600)
+		if entry.OcspStapling != 0 {
+			hotReloadCertInterval = entry.OcspStapling
+			isOcspstapling = true
+		}
+		t := time.NewTicker(time.Duration(hotReloadCertInterval) * time.Second)
+		for {
+			var isReloaded bool
+			if entry.CertificatePath != "" && entry.KeyPath != "" {
+				newCert, err := filesystem.ReadFile(entry.CertificatePath)
+				if err != nil {
+					errors.LogErrorInner(context.Background(), err, "failed to parse certificate")
+					return
+				}
+				newKey, err := filesystem.ReadFile(entry.KeyPath)
+				if err != nil {
+					errors.LogErrorInner(context.Background(), err, "failed to parse key")
+					return
+				}
+				if string(newCert) != string(entry.Certificate) || string(newKey) != string(entry.Key) {
+					entry.Certificate = newCert
+					entry.Key = newKey
+					isReloaded = true
+				}
+			}
+			callback(isReloaded, isOcspstapling)
+			<-t.C
+		}
+	}()
+}
+
 func isCertificateExpired(c *tls.Certificate) bool {
 	if c.Leaf == nil && len(c.Certificate) > 0 {
 		if pc, err := x509.ParseCertificate(c.Certificate[0]); err == nil {
@@ -137,6 +150,9 @@ func issueCertificate(rawCA *Certificate, domain string) (*tls.Certificate, erro
 		return nil, errors.New("failed to generate new certificate for ", domain).Base(err)
 	}
 	newCertPEM, newKeyPEM := newCert.ToPEM()
+	if rawCA.BuildChain {
+		newCertPEM = bytes.Join([][]byte{newCertPEM, rawCA.Certificate}, []byte("\n"))
+	}
 	cert, err := tls.X509KeyPair(newCertPEM, newKeyPEM)
 	return &cert, err
 }
@@ -146,6 +162,7 @@ func (c *Config) getCustomCA() []*Certificate {
 	for _, certificate := range c.Certificate {
 		if certificate.Usage == Certificate_AUTHORITY_ISSUE {
 			certs = append(certs, certificate)
+			setupOcspTicker(certificate, func(isReloaded, isOcspstapling bool){ })
 		}
 	}
 	return certs

transport/internet/tls/config.pb.go

@@ -86,6 +86,7 @@ type Certificate struct {
 	KeyPath string `protobuf:"bytes,6,opt,name=key_path,json=keyPath,proto3" json:"key_path,omitempty"`
 	// If true, one-Time Loading
 	OneTimeLoading bool `protobuf:"varint,7,opt,name=One_time_loading,json=OneTimeLoading,proto3" json:"One_time_loading,omitempty"`
+	BuildChain     bool `protobuf:"varint,8,opt,name=build_chain,json=buildChain,proto3" json:"build_chain,omitempty"`
 }
 
 func (x *Certificate) Reset() {
@@ -169,6 +170,13 @@ func (x *Certificate) GetOneTimeLoading() bool {
 	return false
 }
 
+func (x *Certificate) GetBuildChain() bool {
+	if x != nil {
+		return x.BuildChain
+	}
+	return false
+}
+
 type Config struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -359,7 +367,7 @@ var file_transport_internet_tls_config_proto_rawDesc = []byte{
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 }
 
 var (

transport/internet/tls/config.proto

@@ -31,6 +31,8 @@ message Certificate {
 
   // If true, one-Time Loading
   bool One_time_loading = 7;
+
+  bool build_chain = 8;
 }
 
 message Config {