*: adjust TLS behaviour for dumpling and lightning

br/pkg/lightning/common/security.go

@@ -17,97 +17,62 @@ package common
 import (
 	"context"
 	"crypto/tls"
-	"crypto/x509"
 	"net"
 	"net/http"
 	"net/http/httptest"
-	"os"
 
 	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/br/pkg/httputil"
+	"github.com/pingcap/tidb/util"
 	"github.com/tikv/client-go/v2/config"
 	pd "github.com/tikv/pd/client"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials"
 )
 
 type TLS struct {
-	caPath   string
-	certPath string
-	keyPath  string
-	inner    *tls.Config
-	client   *http.Client
-	url      string
+	caPath    string
+	certPath  string
+	keyPath   string
+	caBytes   []byte
+	certBytes []byte
+	keyBytes  []byte
+	inner     *tls.Config
+	client    *http.Client
+	url       string
 }
 
-// ToTLSConfig constructs a `*tls.Config` from the CA, certification and key
-// paths.
-//
-// If the CA path is empty, returns nil.
-func ToTLSConfig(caPath, certPath, keyPath string) (*tls.Config, error) {
-	if len(caPath) == 0 {
-		return nil, nil
-	}
-
-	// Create a certificate pool from CA
-	certPool := x509.NewCertPool()
-	ca, err := os.ReadFile(caPath)
+// NewTLS constructs a new HTTP client with TLS configured with the CA,
+// certificate and key paths.
+func NewTLS(caPath, certPath, keyPath, host string, caBytes, certBytes, keyBytes []byte) (*TLS, error) {
+	inner, err := util.NewTLSConfig(
+		util.WithCAPath(caPath),
+		util.WithCertAndKeyPath(certPath, keyPath),
+		util.WithCAContent(caBytes),
+		util.WithCertAndKeyContent(certBytes, keyBytes),
+	)
 	if err != nil {
-		return nil, errors.Annotate(err, "could not read ca certificate")
-	}
-
-	// Append the certificates from the CA
-	if !certPool.AppendCertsFromPEM(ca) {
-		return nil, errors.New("failed to append ca certs")
-	}
-
-	tlsConfig := &tls.Config{
-		RootCAs:    certPool,
-		NextProtos: []string{"h2", "http/1.1"}, // specify `h2` to let Go use HTTP/2.
-		MinVersion: tls.VersionTLS12,
-	}
-
-	if len(certPath) != 0 && len(keyPath) != 0 {
-		loadCert := func() (*tls.Certificate, error) {
-			cert, err := tls.LoadX509KeyPair(certPath, keyPath)
-			if err != nil {
-				return nil, errors.Annotate(err, "could not load client key pair")
-			}
-			return &cert, nil
-		}
-		tlsConfig.GetClientCertificate = func(*tls.CertificateRequestInfo) (*tls.Certificate, error) {
-			return loadCert()
-		}
-		tlsConfig.GetCertificate = func(info *tls.ClientHelloInfo) (*tls.Certificate, error) {
-			return loadCert()
-		}
+		return nil, errors.Trace(err)
 	}
-	return tlsConfig, nil
-}
 
-// NewTLS constructs a new HTTP client with TLS configured with the CA,
-// certificate and key paths.
-//
-// If the CA path is empty, returns an instance where TLS is disabled.
-func NewTLS(caPath, certPath, keyPath, host string) (*TLS, error) {
-	if len(caPath) == 0 {
+	if inner == nil {
 		return &TLS{
 			inner:  nil,
 			client: &http.Client{},
 			url:    "http://" + host,
 		}, nil
 	}
-	inner, err := ToTLSConfig(caPath, certPath, keyPath)
-	if err != nil {
-		return nil, errors.Trace(err)
-	}
+
 	return &TLS{
-		caPath:   caPath,
-		certPath: certPath,
-		keyPath:  keyPath,
-		inner:    inner,
-		client:   httputil.NewClient(inner),
-		url:      "https://" + host,
+		caPath:    caPath,
+		certPath:  certPath,
+		keyPath:   keyPath,
+		caBytes:   caBytes,
+		certBytes: certBytes,
+		keyBytes:  keyBytes,
+		inner:     inner,
+		client:    httputil.NewClient(inner),
+		url:       "https://" + host,
 	}, nil
 }
 
@@ -129,11 +94,9 @@ func (tc *TLS) WithHost(host string) *TLS {
 	} else {
 		url = "http://" + host
 	}
-	return &TLS{
-		inner:  tc.inner,
-		client: tc.client,
-		url:    url,
-	}
+	shallowClone := *tc
+	shallowClone.url = url
+	return &shallowClone
 }
 
 // ToGRPCDialOption constructs a gRPC dial option.
@@ -156,14 +119,20 @@ func (tc *TLS) GetJSON(ctx context.Context, path string, v interface{}) error {
 	return GetJSON(ctx, tc.client, tc.url+path, v)
 }
 
+// ToPDSecurityOption converts the TLS configuration to a PD security option.
 func (tc *TLS) ToPDSecurityOption() pd.SecurityOption {
 	return pd.SecurityOption{
-		CAPath:   tc.caPath,
-		CertPath: tc.certPath,
-		KeyPath:  tc.keyPath,
+		CAPath:       tc.caPath,
+		CertPath:     tc.certPath,
+		KeyPath:      tc.keyPath,
+		SSLCABytes:   tc.caBytes,
+		SSLCertBytes: tc.certBytes,
+		SSLKEYBytes:  tc.keyBytes,
 	}
 }
 
+// ToTiKVSecurityConfig converts the TLS configuration to a TiKV security config.
+// TODO: TiKV does not support pass in content.
 func (tc *TLS) ToTiKVSecurityConfig() config.Security {
 	return config.Security{
 		ClusterSSLCA:    tc.caPath,

br/pkg/lightning/common/security_test.go

@@ -42,7 +42,7 @@ func TestGetJSONInsecure(t *testing.T) {
 	u, err := url.Parse(mockServer.URL)
 	require.NoError(t, err)
 
-	tls, err := common.NewTLS("", "", "", u.Host)
+	tls, err := common.NewTLS("", "", "", u.Host, nil, nil, nil)
 	require.NoError(t, err)
 
 	var result struct{ Path string }
@@ -73,15 +73,8 @@ func TestGetJSONSecure(t *testing.T) {
 func TestInvalidTLS(t *testing.T) {
 	tempDir := t.TempDir()
 	caPath := filepath.Join(tempDir, "ca.pem")
-	_, err := common.NewTLS(caPath, "", "", "localhost")
-	require.Regexp(t, "could not read ca certificate:.*", err.Error())
 
-	err = os.WriteFile(caPath, []byte("invalid ca content"), 0o644)
-	require.NoError(t, err)
-	_, err = common.NewTLS(caPath, "", "", "localhost")
-	require.Regexp(t, "failed to append ca certs", err.Error())
-
-	err = os.WriteFile(caPath, []byte(`-----BEGIN CERTIFICATE-----
+	caContent := []byte(`-----BEGIN CERTIFICATE-----
 MIIBITCBxwIUf04/Hucshr7AynmgF8JeuFUEf9EwCgYIKoZIzj0EAwIwEzERMA8G
 A1UEAwwIYnJfdGVzdHMwHhcNMjIwNDEzMDcyNDQxWhcNMjIwNDE1MDcyNDQxWjAT
 MREwDwYDVQQDDAhicl90ZXN0czBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABL+X
@@ -90,20 +83,19 @@ wczUg0AbaFFaCI+FAk3K9vbB9JeIORgGKS+F1TKip5tvm96g7S5lq8SgY38SXVc3
 ze4ZnCkwJdP2VdpI3WZsoI7zAiEAjP8X1c0iFwYxdAbQAveX+9msVrzyUpZOohi4
 RtgQTNI=
 -----END CERTIFICATE-----
-`), 0o644)
+`)
+	err := os.WriteFile(caPath, caContent, 0o644)
 	require.NoError(t, err)
 
 	certPath := filepath.Join(tempDir, "test.pem")
 	keyPath := filepath.Join(tempDir, "test.key")
-	tls, err := common.NewTLS(caPath, certPath, keyPath, "localhost")
-	_, err = tls.TLSConfig().GetCertificate(nil)
-	require.Regexp(t, "could not load client key pair: open.*", err.Error())
 
-	err = os.WriteFile(certPath, []byte("invalid cert content"), 0o644)
+	certContent := []byte("invalid cert content")
+	err = os.WriteFile(certPath, certContent, 0o644)
 	require.NoError(t, err)
-	err = os.WriteFile(keyPath, []byte("invalid key content"), 0o600)
+	keyContent := []byte("invalid key content")
+	err = os.WriteFile(keyPath, keyContent, 0o600)
 	require.NoError(t, err)
-	tls, err = common.NewTLS(caPath, certPath, keyPath, "localhost")
-	_, err = tls.TLSConfig().GetCertificate(nil)
-	require.Regexp(t, "could not load client key pair: tls.*", err.Error())
+	_, err = common.NewTLS(caPath, "", "", "localhost", caContent, certContent, keyContent)
+	require.ErrorContains(t, err, "tls: failed to find any PEM data in certificate input")
 }

br/pkg/lightning/config/config.go

@@ -32,11 +32,13 @@ import (
 	"github.com/BurntSushi/toml"
 	"github.com/docker/go-units"
 	gomysql "github.com/go-sql-driver/mysql"
+	"github.com/google/uuid"
 	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/br/pkg/lightning/common"
 	"github.com/pingcap/tidb/br/pkg/lightning/log"
 	tidbcfg "github.com/pingcap/tidb/config"
 	"github.com/pingcap/tidb/parser/mysql"
+	"github.com/pingcap/tidb/util"
 	filter "github.com/pingcap/tidb/util/table-filter"
 	router "github.com/pingcap/tidb/util/table-router"
 	"go.uber.org/atomic"
@@ -155,7 +157,15 @@ func (cfg *Config) String() string {
 
 func (cfg *Config) ToTLS() (*common.TLS, error) {
 	hostPort := net.JoinHostPort(cfg.TiDB.Host, strconv.Itoa(cfg.TiDB.StatusPort))
-	return common.NewTLS(cfg.Security.CAPath, cfg.Security.CertPath, cfg.Security.KeyPath, hostPort)
+	return common.NewTLS(
+		cfg.Security.CAPath,
+		cfg.Security.CertPath,
+		cfg.Security.KeyPath,
+		hostPort,
+		cfg.Security.CABytes,
+		cfg.Security.CertBytes,
+		cfg.Security.KeyBytes,
+	)
 }
 
 type Lightning struct {
@@ -559,6 +569,11 @@ type Security struct {
 	// TLSConfigName is used to set tls config for lightning in DM, so we don't expose this field to user
 	// DM may running many lightning instances at same time, so we need to set different tls config name for each lightning
 	TLSConfigName string `toml:"-" json:"-"`
+
+	// When DM/engine uses lightning as a library, it can directly pass in the content
+	CABytes   []byte `toml:"-" json:"-"`
+	CertBytes []byte `toml:"-" json:"-"`
+	KeyBytes  []byte `toml:"-" json:"-"`
 }
 
 // RegisterMySQL registers the TLS config with name "cluster" or security.TLSConfigName
@@ -567,7 +582,13 @@ func (sec *Security) RegisterMySQL() error {
 	if sec == nil {
 		return nil
 	}
-	tlsConfig, err := common.ToTLSConfig(sec.CAPath, sec.CertPath, sec.KeyPath)
+
+	tlsConfig, err := util.NewTLSConfig(
+		util.WithCAPath(sec.CAPath),
+		util.WithCertAndKeyPath(sec.CertPath, sec.KeyPath),
+		util.WithCAContent(sec.CABytes),
+		util.WithCertAndKeyContent(sec.CertBytes, sec.KeyBytes),
+	)
 	if err != nil {
 		return errors.Trace(err)
 	}
@@ -1151,9 +1172,11 @@ func (cfg *Config) CheckAndAdjustSecurity() error {
 
 	switch cfg.TiDB.TLS {
 	case "":
-		if len(cfg.TiDB.Security.CAPath) > 0 {
+		if len(cfg.TiDB.Security.CAPath) > 0 || len(cfg.TiDB.Security.CABytes) > 0 ||
+			len(cfg.TiDB.Security.CertPath) > 0 || len(cfg.TiDB.Security.CertBytes) > 0 ||
+			len(cfg.TiDB.Security.KeyPath) > 0 || len(cfg.TiDB.Security.KeyBytes) > 0 {
 			if cfg.TiDB.Security.TLSConfigName == "" {
-				cfg.TiDB.Security.TLSConfigName = "cluster" // adjust this the default value
+				cfg.TiDB.Security.TLSConfigName = uuid.NewString() // adjust this the default value
 			}
 			cfg.TiDB.TLS = cfg.TiDB.Security.TLSConfigName
 		} else {

br/pkg/lightning/config/config_test.go

@@ -279,6 +279,7 @@ func TestAdjustWillBatchImportRatioInvalid(t *testing.T) {
 }
 
 func TestAdjustSecuritySection(t *testing.T) {
+	uuidHolder := "<uuid>"
 	testCases := []struct {
 		input       string
 		expectedCA  string
@@ -302,7 +303,7 @@ func TestAdjustSecuritySection(t *testing.T) {
 				ca-path = "/path/to/ca.pem"
 			`,
 			expectedCA:  "/path/to/ca.pem",
-			expectedTLS: "cluster",
+			expectedTLS: uuidHolder,
 		},
 		{
 			input: `
@@ -321,7 +322,7 @@ func TestAdjustSecuritySection(t *testing.T) {
 				ca-path = "/path/to/ca2.pem"
 			`,
 			expectedCA:  "/path/to/ca2.pem",
-			expectedTLS: "cluster",
+			expectedTLS: uuidHolder,
 		},
 		{
 			input: `
@@ -330,7 +331,7 @@ func TestAdjustSecuritySection(t *testing.T) {
 				ca-path = "/path/to/ca2.pem"
 			`,
 			expectedCA:  "/path/to/ca2.pem",
-			expectedTLS: "cluster",
+			expectedTLS: uuidHolder,
 		},
 		{
 			input: `
@@ -356,7 +357,11 @@ func TestAdjustSecuritySection(t *testing.T) {
 		err = cfg.Adjust(context.Background())
 		require.NoError(t, err, comment)
 		require.Equal(t, tc.expectedCA, cfg.TiDB.Security.CAPath, comment)
-		require.Equal(t, tc.expectedTLS, cfg.TiDB.TLS, comment)
+		if tc.expectedTLS == uuidHolder {
+			require.NotEmpty(t, cfg.TiDB.TLS, comment)
+		} else {
+			require.Equal(t, tc.expectedTLS, cfg.TiDB.TLS, comment)
+		}
 	}
 	// test different tls config name
 	cfg := config.NewConfig()

br/pkg/lightning/lightning.go

@@ -96,7 +96,15 @@ func New(globalCfg *config.GlobalConfig) *Lightning {
 		os.Exit(1)
 	}
 
-	tls, err := common.NewTLS(globalCfg.Security.CAPath, globalCfg.Security.CertPath, globalCfg.Security.KeyPath, globalCfg.App.StatusAddr)
+	tls, err := common.NewTLS(
+		globalCfg.Security.CAPath,
+		globalCfg.Security.CertPath,
+		globalCfg.Security.KeyPath,
+		globalCfg.App.StatusAddr,
+		globalCfg.Security.CABytes,
+		globalCfg.Security.CertBytes,
+		globalCfg.Security.KeyBytes,
+	)
 	if err != nil {
 		log.L().Fatal("failed to load TLS certificates", zap.Error(err))
 	}