Merge pull request #1872 from kmlebedev/grpc_auth

TLS allowed CommonNames

1 files changed, 59 insertions, 7 deletions

diff --git a/weed/security/tls.go b/weed/security/tls.go
index b4bf84e2d..7d3ffcdca 100644
--- a/weed/security/tls.go
+++ b/weed/security/tls.go
@@ -1,10 +1,16 @@
 package security
 
 import (
+	"context"
 	"crypto/tls"
 	"crypto/x509"
 	"github.com/chrislusf/seaweedfs/weed/util"
+	grpc_auth "github.com/grpc-ecosystem/go-grpc-middleware/auth"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/peer"
+	"google.golang.org/grpc/status"
 	"io/ioutil"
+	"strings"
 
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials"
@@ -12,21 +18,29 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/glog"
 )
 
-func LoadServerTLS(config *util.ViperProxy, component string) grpc.ServerOption {
+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
+		return nil, nil
 	}
 
 	// load cert/key, ca cert
 	cert, err := tls.LoadX509KeyPair(config.GetString(component+".cert"), config.GetString(component+".key"))
 	if err != nil {
-		glog.V(1).Infof("load cert/key error: %v", err)
-		return nil
+		glog.V(1).Infof("load cert: %s / key: %s error: %v",
+			config.GetString(component+".cert"),
+			config.GetString(component+".key"),
+			err)
+		return nil, nil
 	}
 	caCert, err := ioutil.ReadFile(config.GetString("grpc.ca"))
 	if err != nil {
-		glog.V(1).Infof("read ca cert file error: %v", err)
-		return nil
+		glog.V(1).Infof("read ca cert file %s error: %v", config.GetString("grpc.ca"), err)
+		return nil, nil
 	}
 	caCertPool := x509.NewCertPool()
 	caCertPool.AppendCertsFromPEM(caCert)
@@ -36,7 +50,20 @@ func LoadServerTLS(config *util.ViperProxy, component string) grpc.ServerOption
 		ClientAuth:   tls.RequireAndVerifyClientCert,
 	})
 
-	return grpc.Creds(ta)
+	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,
+		}
+		return grpc.Creds(ta), grpc.UnaryInterceptor(grpc_auth.UnaryServerInterceptor(auther.Authenticate))
+	}
+	return grpc.Creds(ta), nil
 }
 
 func LoadClientTLS(config *util.ViperProxy, component string) grpc.DialOption {
@@ -70,3 +97,28 @@ func LoadClientTLS(config *util.ViperProxy, component string) grpc.DialOption {
 	})
 	return grpc.WithTransportCredentials(ta)
 }
+
+func (a Authenticator) Authenticate(ctx context.Context) (newCtx context.Context, err error) {
+	p, ok := peer.FromContext(ctx)
+	if !ok {
+		return ctx, status.Error(codes.Unauthenticated, "no peer found")
+	}
+
+	tlsAuth, ok := p.AuthInfo.(credentials.TLSInfo)
+	if !ok {
+		return ctx, status.Error(codes.Unauthenticated, "unexpected peer transport credentials")
+	}
+	if len(tlsAuth.State.VerifiedChains) == 0 || len(tlsAuth.State.VerifiedChains[0]) == 0 {
+		return ctx, status.Error(codes.Unauthenticated, "could not verify peer certificate")
+	}
+
+	commonName := tlsAuth.State.VerifiedChains[0][0].Subject.CommonName
+	if a.AllowedWildcardDomain != "" && strings.HasSuffix(commonName, a.AllowedWildcardDomain) {
+		return ctx, nil
+	}
+	if _, ok := a.AllowedCommonNames[commonName]; ok {
+		return ctx, nil
+	}
+
+	return ctx, status.Errorf(codes.Unauthenticated, "invalid subject common name: %s", commonName)
+}