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package security
import (
"crypto/tls"
"crypto/x509"
"fmt"
"os"
"slices"
"strings"
"time"
"github.com/seaweedfs/seaweedfs/weed/util/log"
"github.com/seaweedfs/seaweedfs/weed/util"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
"google.golang.org/grpc/credentials/tls/certprovider/pemfile"
"google.golang.org/grpc/security/advancedtls"
)
const CredRefreshingInterval = time.Duration(5) * time.Hour
type Authenticator struct {
AllowedWildcardDomain string
AllowedCommonNames map[string]bool
}
func LoadServerTLS(config *util.ViperProxy, component string) (grpc.ServerOption, grpc.ServerOption) {
if config == nil {
return nil, nil
}
serverOptions := pemfile.Options{
CertFile: config.GetString(component + ".cert"),
KeyFile: config.GetString(component + ".key"),
RefreshDuration: CredRefreshingInterval,
}
if serverOptions.CertFile == "" || serverOptions.KeyFile == "" {
return nil, nil
}
serverIdentityProvider, err := pemfile.NewProvider(serverOptions)
if err != nil {
log.Warningf("pemfile.NewProvider(%v) %v failed: %v", serverOptions, component, err)
return nil, nil
}
serverRootOptions := pemfile.Options{
RootFile: config.GetString("grpc.ca"),
RefreshDuration: CredRefreshingInterval,
}
serverRootProvider, err := pemfile.NewProvider(serverRootOptions)
if err != nil {
log.Warningf("pemfile.NewProvider(%v) failed: %v", serverRootOptions, err)
return nil, nil
}
// Start a server and create a client using advancedtls API with Provider.
options := &advancedtls.Options{
IdentityOptions: advancedtls.IdentityCertificateOptions{
IdentityProvider: serverIdentityProvider,
},
RootOptions: advancedtls.RootCertificateOptions{
RootProvider: serverRootProvider,
},
RequireClientCert: true,
VerificationType: advancedtls.CertVerification,
}
options.MinTLSVersion, err = TlsVersionByName(config.GetString("tls.min_version"))
if err != nil {
log.Warningf("tls min version parse failed, %v", err)
return nil, nil
}
options.MaxTLSVersion, err = TlsVersionByName(config.GetString("tls.max_version"))
if err != nil {
log.Warningf("tls max version parse failed, %v", err)
return nil, nil
}
options.CipherSuites, err = TlsCipherSuiteByNames(config.GetString("tls.cipher_suites"))
if err != nil {
log.Warningf("tls cipher suite parse failed, %v", err)
return nil, nil
}
allowedCommonNames := config.GetString(component + ".allowed_commonNames")
allowedWildcardDomain := config.GetString("grpc.allowed_wildcard_domain")
if allowedCommonNames != "" || allowedWildcardDomain != "" {
allowedCommonNamesMap := make(map[string]bool)
for _, s := range strings.Split(allowedCommonNames, ",") {
allowedCommonNamesMap[s] = true
}
auther := Authenticator{
AllowedCommonNames: allowedCommonNamesMap,
AllowedWildcardDomain: allowedWildcardDomain,
}
options.AdditionalPeerVerification = auther.Authenticate
} else {
options.AdditionalPeerVerification = func(params *advancedtls.HandshakeVerificationInfo) (*advancedtls.PostHandshakeVerificationResults, error) {
return &advancedtls.PostHandshakeVerificationResults{}, nil
}
}
ta, err := advancedtls.NewServerCreds(options)
if err != nil {
log.Warningf("advancedtls.NewServerCreds(%v) failed: %v", options, err)
return nil, nil
}
return grpc.Creds(ta), nil
}
func LoadClientTLS(config *util.ViperProxy, component string) grpc.DialOption {
if config == nil {
return grpc.WithTransportCredentials(insecure.NewCredentials())
}
certFileName, keyFileName, caFileName := config.GetString(component+".cert"), config.GetString(component+".key"), config.GetString("grpc.ca")
if certFileName == "" || keyFileName == "" || caFileName == "" {
return grpc.WithTransportCredentials(insecure.NewCredentials())
}
clientOptions := pemfile.Options{
CertFile: certFileName,
KeyFile: keyFileName,
RefreshDuration: CredRefreshingInterval,
}
clientProvider, err := pemfile.NewProvider(clientOptions)
if err != nil {
log.Warningf("pemfile.NewProvider(%v) failed %v", clientOptions, err)
return grpc.WithTransportCredentials(insecure.NewCredentials())
}
clientRootOptions := pemfile.Options{
RootFile: config.GetString("grpc.ca"),
RefreshDuration: CredRefreshingInterval,
}
clientRootProvider, err := pemfile.NewProvider(clientRootOptions)
if err != nil {
log.Warningf("pemfile.NewProvider(%v) failed: %v", clientRootOptions, err)
return grpc.WithTransportCredentials(insecure.NewCredentials())
}
options := &advancedtls.Options{
IdentityOptions: advancedtls.IdentityCertificateOptions{
IdentityProvider: clientProvider,
},
AdditionalPeerVerification: func(params *advancedtls.HandshakeVerificationInfo) (*advancedtls.PostHandshakeVerificationResults, error) {
return &advancedtls.PostHandshakeVerificationResults{}, nil
},
RootOptions: advancedtls.RootCertificateOptions{
RootProvider: clientRootProvider,
},
VerificationType: advancedtls.CertVerification,
}
ta, err := advancedtls.NewClientCreds(options)
if err != nil {
log.Warningf("advancedtls.NewClientCreds(%v) failed: %v", options, err)
return grpc.WithTransportCredentials(insecure.NewCredentials())
}
return grpc.WithTransportCredentials(ta)
}
func LoadClientTLSHTTP(clientCertFile string) *tls.Config {
clientCerts, err := os.ReadFile(clientCertFile)
if err != nil {
log.Fatal(err)
}
certPool := x509.NewCertPool()
ok := certPool.AppendCertsFromPEM(clientCerts)
if !ok {
log.Fatalf("Error processing client certificate in %s\n", clientCertFile)
}
return &tls.Config{
ClientCAs: certPool,
ClientAuth: tls.RequireAndVerifyClientCert,
}
}
func (a Authenticator) Authenticate(params *advancedtls.HandshakeVerificationInfo) (*advancedtls.PostHandshakeVerificationResults, error) {
if a.AllowedWildcardDomain != "" && strings.HasSuffix(params.Leaf.Subject.CommonName, a.AllowedWildcardDomain) {
return &advancedtls.PostHandshakeVerificationResults{}, nil
}
if _, ok := a.AllowedCommonNames[params.Leaf.Subject.CommonName]; ok {
return &advancedtls.PostHandshakeVerificationResults{}, nil
}
err := fmt.Errorf("Authenticate: invalid subject client common name: %s", params.Leaf.Subject.CommonName)
log.Error(err)
return nil, err
}
func FixTlsConfig(viper *util.ViperProxy, config *tls.Config) error {
var err error
config.MinVersion, err = TlsVersionByName(viper.GetString("tls.min_version"))
if err != nil {
return err
}
config.MaxVersion, err = TlsVersionByName(viper.GetString("tls.max_version"))
if err != nil {
return err
}
config.CipherSuites, err = TlsCipherSuiteByNames(viper.GetString("tls.cipher_suites"))
return err
}
func TlsVersionByName(name string) (uint16, error) {
switch name {
case "":
return 0, nil
case "SSLv3":
return tls.VersionSSL30, nil
case "TLS 1.0":
return tls.VersionTLS10, nil
case "TLS 1.1":
return tls.VersionTLS11, nil
case "TLS 1.2":
return tls.VersionTLS12, nil
case "TLS 1.3":
return tls.VersionTLS13, nil
default:
return 0, fmt.Errorf("invalid tls version %s", name)
}
}
func TlsCipherSuiteByNames(cipherSuiteNames string) ([]uint16, error) {
cipherSuiteNames = strings.TrimSpace(cipherSuiteNames)
if cipherSuiteNames == "" {
return nil, nil
}
names := strings.Split(cipherSuiteNames, ",")
cipherSuites := tls.CipherSuites()
cipherIds := make([]uint16, 0, len(names))
for _, name := range names {
name = strings.TrimSpace(name)
index := slices.IndexFunc(cipherSuites, func(suite *tls.CipherSuite) bool {
return name == suite.Name
})
if index == -1 {
return nil, fmt.Errorf("invalid tls cipher suite name %s", name)
}
cipherIds = append(cipherIds, cipherSuites[index].ID)
}
return cipherIds, nil
}
|
