reject connections based on CRL file

e2e/ctl_v3_kv_test.go

@@ -16,6 +16,7 @@ package e2e
 
 import (
 	"fmt"
+	"strings"
 	"testing"
 )
 
@@ -49,6 +50,29 @@ func TestCtlV3DelClientTLS(t *testing.T) { testCtl(t, delTest, withCfg(configCli
 func TestCtlV3DelPeerTLS(t *testing.T)   { testCtl(t, delTest, withCfg(configPeerTLS)) }
 func TestCtlV3DelTimeout(t *testing.T)   { testCtl(t, delTest, withDialTimeout(0)) }
 
+func TestCtlV3GetRevokedCRL(t *testing.T) {
+	cfg := etcdProcessClusterConfig{
+		clusterSize:           1,
+		initialToken:          "new",
+		clientTLS:             clientTLS,
+		isClientCRL:           true,
+		clientCertAuthEnabled: true,
+	}
+	testCtl(t, testGetRevokedCRL, withCfg(cfg))
+}
+
+func testGetRevokedCRL(cx ctlCtx) {
+	// test reject
+	if err := ctlV3Put(cx, "k", "v", ""); err == nil || !strings.Contains(err.Error(), "code = Internal") {
+		cx.t.Fatalf("expected reset connection, got %v", err)
+	}
+	// test accept
+	cx.epc.cfg.isClientCRL = false
+	if err := ctlV3Put(cx, "k", "v", ""); err != nil {
+		cx.t.Fatal(err)
+	}
+}
+
 func putTest(cx ctlCtx) {
 	key, value := "foo", "bar"
 

e2e/ctl_v3_test.go

@@ -180,6 +180,10 @@ func (cx *ctlCtx) prefixArgs(eps []string) []string {
 		if cx.epc.cfg.isClientAutoTLS {
 			fmap["insecure-transport"] = "false"
 			fmap["insecure-skip-tls-verify"] = "true"
+		} else if cx.epc.cfg.isClientCRL {
+			fmap["cacert"] = caPath
+			fmap["cert"] = revokedCertPath
+			fmap["key"] = revokedPrivateKeyPath
 		} else {
 			fmap["cacert"] = caPath
 			fmap["cert"] = certPath

e2e/etcd_test.go

@@ -35,6 +35,10 @@ var (
 	certPath       string
 	privateKeyPath string
 	caPath         string
+
+	crlPath               string
+	revokedCertPath       string
+	revokedPrivateKeyPath string
 )
 
 type clientConnType int
@@ -175,10 +179,12 @@ type etcdProcessClusterConfig struct {
 	isPeerTLS             bool
 	isPeerAutoTLS         bool
 	isClientAutoTLS       bool
-	forceNewCluster       bool
-	initialToken          string
-	quotaBackendBytes     int64
-	noStrictReconfig      bool
+	isClientCRL           bool
+
+	forceNewCluster   bool
+	initialToken      string
+	quotaBackendBytes int64
+	noStrictReconfig  bool
 }
 
 // newEtcdProcessCluster launches a new cluster from etcd processes, returning
@@ -228,6 +234,10 @@ func (cfg *etcdProcessClusterConfig) etcdProcessConfigs() []*etcdProcessConfig {
 	privateKeyPath = certDir + "/server.key.insecure"
 	caPath = certDir + "/ca.crt"
 
+	revokedCertPath = certDir + "/server-revoked.crt"
+	revokedPrivateKeyPath = certDir + "/server-revoked.key.insecure"
+	crlPath = certDir + "/revoke.crl"
+
 	if cfg.basePort == 0 {
 		cfg.basePort = etcdProcessBasePort
 	}
@@ -384,6 +394,11 @@ func (cfg *etcdProcessClusterConfig) tlsArgs() (args []string) {
 			args = append(args, tlsPeerArgs...)
 		}
 	}
+
+	if cfg.isClientCRL {
+		args = append(args, "--client-crl-file", crlPath, "--client-cert-auth")
+	}
+
 	return args
 }
 

embed/etcd.go

@@ -16,7 +16,6 @@ package embed
 
 import (
 	"context"
-	"crypto/tls"
 	"fmt"
 	"io/ioutil"
 	defaultLog "log"
@@ -365,12 +364,8 @@ func startClientListeners(cfg *Config) (sctxs map[string]*serveCtx, err error) {
 }
 
 func (e *Etcd) serve() (err error) {
-	var ctlscfg *tls.Config
 	if !e.cfg.ClientTLSInfo.Empty() {
 		plog.Infof("ClientTLS: %s", e.cfg.ClientTLSInfo)
-		if ctlscfg, err = e.cfg.ClientTLSInfo.ServerConfig(); err != nil {
-			return err
-		}
 	}
 
 	if e.cfg.CorsInfo.String() != "" {
@@ -394,7 +389,7 @@ func (e *Etcd) serve() (err error) {
 	}
 	for _, sctx := range e.sctxs {
 		go func(s *serveCtx) {
-			e.errHandler(s.serve(e.Server, ctlscfg, v2h, e.errHandler))
+			e.errHandler(s.serve(e.Server, &e.cfg.ClientTLSInfo, v2h, e.errHandler))
 		}(sctx)
 	}
 	return nil

embed/serve.go

@@ -15,7 +15,6 @@
 package embed
 
 import (
-	"crypto/tls"
 	"io/ioutil"
 	defaultLog "log"
 	"net"
@@ -33,6 +32,7 @@ import (
 	"github.com/coreos/etcd/etcdserver/api/v3rpc"
 	etcdservergw "github.com/coreos/etcd/etcdserver/etcdserverpb/gw"
 	"github.com/coreos/etcd/pkg/debugutil"
+	"github.com/coreos/etcd/pkg/transport"
 
 	"github.com/cockroachdb/cmux"
 	gw "github.com/grpc-ecosystem/grpc-gateway/runtime"
@@ -65,7 +65,7 @@ func newServeCtx() *serveCtx {
 // serve accepts incoming connections on the listener l,
 // creating a new service goroutine for each. The service goroutines
 // read requests and then call handler to reply to them.
-func (sctx *serveCtx) serve(s *etcdserver.EtcdServer, tlscfg *tls.Config, handler http.Handler, errHandler func(error)) error {
+func (sctx *serveCtx) serve(s *etcdserver.EtcdServer, tlsinfo *transport.TLSInfo, handler http.Handler, errHandler func(error)) error {
 	logger := defaultLog.New(ioutil.Discard, "etcdhttp", 0)
 	<-s.ReadyNotify()
 	plog.Info("ready to serve client requests")
@@ -106,6 +106,10 @@ func (sctx *serveCtx) serve(s *etcdserver.EtcdServer, tlscfg *tls.Config, handle
 	}
 
 	if sctx.secure {
+		tlscfg, tlsErr := tlsinfo.ServerConfig()
+		if tlsErr != nil {
+			return tlsErr
+		}
 		gs := v3rpc.Server(s, tlscfg)
 		sctx.grpcServerC <- gs
 		v3electionpb.RegisterElectionServer(gs, servElection)
@@ -125,7 +129,10 @@ func (sctx *serveCtx) serve(s *etcdserver.EtcdServer, tlscfg *tls.Config, handle
 			return err
 		}
 
-		tlsl := tls.NewListener(m.Match(cmux.Any()), tlscfg)
+		tlsl, lerr := transport.NewTLSListener(m.Match(cmux.Any()), tlsinfo)
+		if lerr != nil {
+			return lerr
+		}
 		// TODO: add debug flag; enable logging when debug flag is set
 		httpmux := sctx.createMux(gwmux, handler)
 

etcdmain/config.go

@@ -179,6 +179,7 @@ func newConfig() *config {
 	fs.StringVar(&cfg.ClientTLSInfo.CertFile, "cert-file", "", "Path to the client server TLS cert file.")
 	fs.StringVar(&cfg.ClientTLSInfo.KeyFile, "key-file", "", "Path to the client server TLS key file.")
 	fs.BoolVar(&cfg.ClientTLSInfo.ClientCertAuth, "client-cert-auth", false, "Enable client cert authentication.")
+	fs.StringVar(&cfg.ClientTLSInfo.CRLFile, "client-crl-file", "", "Path to the client certificate revocation list file.")
 	fs.StringVar(&cfg.ClientTLSInfo.TrustedCAFile, "trusted-ca-file", "", "Path to the client server TLS trusted CA key file.")
 	fs.BoolVar(&cfg.ClientAutoTLS, "auto-tls", false, "Client TLS using generated certificates")
 	fs.StringVar(&cfg.PeerTLSInfo.CAFile, "peer-ca-file", "", "DEPRECATED: Path to the peer server TLS CA file.")
@@ -187,6 +188,7 @@ func newConfig() *config {
 	fs.BoolVar(&cfg.PeerTLSInfo.ClientCertAuth, "peer-client-cert-auth", false, "Enable peer client cert authentication.")
 	fs.StringVar(&cfg.PeerTLSInfo.TrustedCAFile, "peer-trusted-ca-file", "", "Path to the peer server TLS trusted CA file.")
 	fs.BoolVar(&cfg.PeerAutoTLS, "peer-auto-tls", false, "Peer TLS using generated certificates")
+	fs.StringVar(&cfg.PeerTLSInfo.CRLFile, "peer-crl-file", "", "Path to the peer certificate revocation list file.")
 
 	// logging
 	fs.BoolVar(&cfg.Debug, "debug", false, "Enable debug-level logging for etcd.")

etcdmain/help.go

@@ -128,6 +128,8 @@ security flags:
 		path to the client server TLS key file.
 	--client-cert-auth 'false'
 		enable client cert authentication.
+	--client-crl-file ''
+		path to the client certificate revocation list file.
 	--trusted-ca-file ''
 		path to the client server TLS trusted CA key file.
 	--auto-tls 'false'
@@ -144,6 +146,8 @@ security flags:
 		path to the peer server TLS trusted CA file.
 	--peer-auto-tls 'false'
 		peer TLS using self-generated certificates if --peer-key-file and --peer-cert-file are not provided.
+	--peer-crl-file ''
+		path to the peer certificate revocation list file.
 
 logging flags
 

integration/fixtures/ca-csr.json

@@ -0,0 +1,19 @@
+{
+  "key": {
+    "algo": "rsa",
+    "size": 4096
+  },
+  "names": [
+    {
+      "O": "etcd",
+      "OU": "etcd Security",
+      "L": "San Francisco",
+      "ST": "California",
+      "C": "USA"
+    }
+  ],
+  "CN": "ca",
+  "ca": {
+    "expiry": "87600h"
+  }
+}

integration/fixtures/ca.crt

@@ -1,23 +1,33 @@
 -----BEGIN CERTIFICATE-----
-MIID2zCCAsOgAwIBAgIUZXdXtcOe421Geq9VjM35+SRJUS8wDQYJKoZIhvcNAQEL
-BQAwdTEMMAoGA1UEBhMDVVNBMRMwEQYDVQQIEwpDYWxpZm9ybmlhMRYwFAYDVQQH
-Ew1TYW4gRnJhbmNpc2NvMRAwDgYDVQQKEwdldGNkLWNhMQswCQYDVQQLEwJDQTEZ
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-MBQGA1UEBxMNU2FuIEZyYW5jaXNjbzEQMA4GA1UEChMHZXRjZC1jYTELMAkGA1UE
-CxMCQ0ExGTAXBgNVBAMTEEF1dG9nZW5lcmF0ZWQgQ0EwggEiMA0GCSqGSIb3DQEB
-AQUAA4IBDwAwggEKAoIBAQDBMoRjH0ULs+0cRZWZ8BGJ7Fmf152J9uUE3/NgYV3M
-4Ntu6l3IYALXT5QSHQZIz5425HP6827mwAOZ/bk6E3yzq6XR/vHzxPFLzBMzFuq/
-elQA4nb7eYHICriEFUdJo2EUg3lSD3m6Deof/NjPMgUHtuvhn1OJMezaALZiMZ0K
-9B9/1ktW4Roi6FMVFfJM5rKr9EIz6P2mFUpVHI7KSGbeuHiTPq0FLVv7wFPxRFX5
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+zceob2+4yKU2W+OQNeVChUzc
 -----END CERTIFICATE-----

integration/fixtures/gencert.json

@@ -0,0 +1,13 @@
+{
+  "signing": {
+    "default": {
+        "usages": [
+          "signing",
+          "key encipherment",
+          "server auth",
+          "client auth"
+        ],
+        "expiry": "87600h"
+    }
+  }
+}

integration/fixtures/gencerts.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+
+if ! [[ "$0" =~ "./gencerts.sh" ]]; then
+	echo "must be run from 'fixtures'"
+	exit 255
+fi
+
+if ! which cfssl; then
+	echo "cfssl is not installed"
+	exit 255
+fi
+
+cfssl gencert --initca=true ./ca-csr.json | cfssljson --bare ./ca
+mv ca.pem ca.crt
+
+cfssl gencert \
+    --ca ./ca.crt \
+    --ca-key ./ca-key.pem \
+    --config ./gencert.json \
+    ./server-ca-csr.json | cfssljson --bare ./server
+mv server.pem server.crt
+mv server-key.pem server.key.insecure
+
+cfssl gencert --ca ./ca.crt \
+    --ca-key ./ca-key.pem \
+    --config ./gencert.json \
+    ./server-ca-csr.json 2>revoked.stderr | cfssljson --bare ./server-revoked
+mv server-revoked.pem server-revoked.crt
+mv server-revoked-key.pem server-revoked.key.insecure
+
+grep serial revoked.stderr | awk ' { print $9 } ' >revoke.txt
+cfssl gencrl revoke.txt ca.crt ca-key.pem | base64 -d >revoke.crl
+
+rm -f *.csr *.pem *.stderr *.txt

integration/fixtures/server-ca-csr.json

@@ -0,0 +1,20 @@
+{
+  "key": {
+    "algo": "rsa",
+    "size": 4096
+  },
+  "names": [
+    {
+      "O": "etcd",
+      "OU": "etcd Security",
+      "L": "San Francisco",
+      "ST": "California",
+      "C": "USA"
+    }
+  ],
+  "CN": "example.com",
+  "hosts": [
+    "127.0.0.1",
+    "localhost"
+  ]
+}

integration/fixtures/server-revoked.crt

@@ -0,0 +1,35 @@
+-----BEGIN CERTIFICATE-----
+MIIGEjCCA/qgAwIBAgIUAyLIF+/vIdTKKf1wxsU+CfQkuvAwDQYJKoZIhvcNAQEN
+BQAwbzEMMAoGA1UEBhMDVVNBMRMwEQYDVQQIEwpDYWxpZm9ybmlhMRYwFAYDVQQH
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+-----END CERTIFICATE-----