5 files changed, 119 insertions, 4 deletions
diff --git a/vendor/google.golang.org/grpc/credentials/credentials.go b/vendor/google.golang.org/grpc/credentials/credentials.go
index 3351bf0ee..1dae57ab1 100644
--- a/vendor/google.golang.org/grpc/credentials/credentials.go
+++ b/vendor/google.golang.org/grpc/credentials/credentials.go
@@ -31,6 +31,7 @@ import (
 	"net"
 	"strings"
 
+	"github.com/golang/protobuf/proto"
 	"golang.org/x/net/context"
 )
 
@@ -118,6 +119,18 @@ func (t TLSInfo) AuthType() string {
 	return "tls"
 }
 
+// GetChannelzSecurityValue returns security info requested by channelz.
+func (t TLSInfo) GetChannelzSecurityValue() ChannelzSecurityValue {
+	v := &TLSChannelzSecurityValue{
+		StandardName: cipherSuiteLookup[t.State.CipherSuite],
+	}
+	// Currently there's no way to get LocalCertificate info from tls package.
+	if len(t.State.PeerCertificates) > 0 {
+		v.RemoteCertificate = t.State.PeerCertificates[0].Raw
+	}
+	return v
+}
+
 // tlsCreds is the credentials required for authenticating a connection using TLS.
 type tlsCreds struct {
 	// TLS configuration
@@ -155,7 +168,7 @@ func (c *tlsCreds) ClientHandshake(ctx context.Context, authority string, rawCon
 	case <-ctx.Done():
 		return nil, nil, ctx.Err()
 	}
-	return conn, TLSInfo{conn.ConnectionState()}, nil
+	return tlsConn{Conn: conn, rawConn: rawConn}, TLSInfo{conn.ConnectionState()}, nil
 }
 
 func (c *tlsCreds) ServerHandshake(rawConn net.Conn) (net.Conn, AuthInfo, error) {
@@ -163,7 +176,7 @@ func (c *tlsCreds) ServerHandshake(rawConn net.Conn) (net.Conn, AuthInfo, error)
 	if err := conn.Handshake(); err != nil {
 		return nil, nil, err
 	}
-	return conn, TLSInfo{conn.ConnectionState()}, nil
+	return tlsConn{Conn: conn, rawConn: rawConn}, TLSInfo{conn.ConnectionState()}, nil
 }
 
 func (c *tlsCreds) Clone() TransportCredentials {
@@ -218,3 +231,63 @@ func NewServerTLSFromFile(certFile, keyFile string) (TransportCredentials, error
 	}
 	return NewTLS(&tls.Config{Certificates: []tls.Certificate{cert}}), nil
 }
+
+// ChannelzSecurityInfo defines the interface that security protocols should implement
+// in order to provide security info to channelz.
+type ChannelzSecurityInfo interface {
+	GetSecurityValue() ChannelzSecurityValue
+}
+
+// ChannelzSecurityValue defines the interface that GetSecurityValue() return value
+// should satisfy. This interface should only be satisfied by *TLSChannelzSecurityValue
+// and *OtherChannelzSecurityValue.
+type ChannelzSecurityValue interface {
+	isChannelzSecurityValue()
+}
+
+// TLSChannelzSecurityValue defines the struct that TLS protocol should return
+// from GetSecurityValue(), containing security info like cipher and certificate used.
+type TLSChannelzSecurityValue struct {
+	StandardName      string
+	LocalCertificate  []byte
+	RemoteCertificate []byte
+}
+
+func (*TLSChannelzSecurityValue) isChannelzSecurityValue() {}
+
+// OtherChannelzSecurityValue defines the struct that non-TLS protocol should return
+// from GetSecurityValue(), which contains protocol specific security info. Note
+// the Value field will be sent to users of channelz requesting channel info, and
+// thus sensitive info should better be avoided.
+type OtherChannelzSecurityValue struct {
+	Name  string
+	Value proto.Message
+}
+
+func (*OtherChannelzSecurityValue) isChannelzSecurityValue() {}
+
+type tlsConn struct {
+	*tls.Conn
+	rawConn net.Conn
+}
+
+var cipherSuiteLookup = map[uint16]string{
+	tls.TLS_RSA_WITH_RC4_128_SHA:                "TLS_RSA_WITH_RC4_128_SHA",
+	tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA:           "TLS_RSA_WITH_3DES_EDE_CBC_SHA",
+	tls.TLS_RSA_WITH_AES_128_CBC_SHA:            "TLS_RSA_WITH_AES_128_CBC_SHA",
+	tls.TLS_RSA_WITH_AES_256_CBC_SHA:            "TLS_RSA_WITH_AES_256_CBC_SHA",
+	tls.TLS_RSA_WITH_AES_128_GCM_SHA256:         "TLS_RSA_WITH_AES_128_GCM_SHA256",
+	tls.TLS_RSA_WITH_AES_256_GCM_SHA384:         "TLS_RSA_WITH_AES_256_GCM_SHA384",
+	tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA:        "TLS_ECDHE_ECDSA_WITH_RC4_128_SHA",
+	tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA:    "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA",
+	tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA:    "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA",
+	tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA:          "TLS_ECDHE_RSA_WITH_RC4_128_SHA",
+	tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA:     "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA",
+	tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA:      "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA",
+	tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA:      "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA",
+	tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256:   "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
+	tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256: "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
+	tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384:   "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
+	tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384: "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384",
+	tls.TLS_FALLBACK_SCSV:                       "TLS_FALLBACK_SCSV",
+}
diff --git a/vendor/google.golang.org/grpc/credentials/credentials_util_pre_go17.go b/vendor/google.golang.org/grpc/credentials/go16.go
index d6bbcc9fd..d6bbcc9fd 100644
--- a/vendor/google.golang.org/grpc/credentials/credentials_util_pre_go17.go
+++ b/vendor/google.golang.org/grpc/credentials/go16.go
diff --git a/vendor/google.golang.org/grpc/credentials/credentials_util_go17.go b/vendor/google.golang.org/grpc/credentials/go17.go
index 60409aac0..fbd500002 100644
--- a/vendor/google.golang.org/grpc/credentials/credentials_util_go17.go
+++ b/vendor/google.golang.org/grpc/credentials/go17.go
@@ -1,5 +1,4 @@
-// +build go1.7
-// +build !go1.8
+// +build go1.7,!go1.8
 
 /*
  *
diff --git a/vendor/google.golang.org/grpc/credentials/credentials_util_go18.go b/vendor/google.golang.org/grpc/credentials/go18.go
index 93f0e1d8d..db30d46cc 100644
--- a/vendor/google.golang.org/grpc/credentials/credentials_util_go18.go
+++ b/vendor/google.golang.org/grpc/credentials/go18.go
@@ -24,6 +24,14 @@ import (
 	"crypto/tls"
 )
 
+func init() {
+	cipherSuiteLookup[tls.TLS_RSA_WITH_AES_128_CBC_SHA256] = "TLS_RSA_WITH_AES_128_CBC_SHA256"
+	cipherSuiteLookup[tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256] = "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256"
+	cipherSuiteLookup[tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256] = "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256"
+	cipherSuiteLookup[tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305] = "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305"
+	cipherSuiteLookup[tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305] = "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305"
+}
+
 // cloneTLSConfig returns a shallow clone of the exported
 // fields of cfg, ignoring the unexported sync.Once, which
 // contains a mutex and must not be copied.
diff --git a/vendor/google.golang.org/grpc/credentials/go19.go b/vendor/google.golang.org/grpc/credentials/go19.go
new file mode 100644
index 000000000..2a4ca1a57
--- /dev/null
+++ b/vendor/google.golang.org/grpc/credentials/go19.go
@@ -0,0 +1,35 @@
+// +build go1.9,!appengine
+
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package credentials
+
+import (
+	"errors"
+	"syscall"
+)
+
+// implements the syscall.Conn interface
+func (c tlsConn) SyscallConn() (syscall.RawConn, error) {
+	conn, ok := c.rawConn.(syscall.Conn)
+	if !ok {
+		return nil, errors.New("RawConn does not implement syscall.Conn")
+	}
+	return conn.SyscallConn()
+}