rebase: add kube-storage/replication to go.mod

add dependent kube-storage/replication package
to the vendor.

update grpc to latest release v1.35.0.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/google.golang.org/grpc/credentials/credentials.go

@@ -25,9 +25,11 @@ package credentials // import "google.golang.org/grpc/credentials"
 import (
 	"context"
 	"errors"
+	"fmt"
 	"net"
 
 	"github.com/golang/protobuf/proto"
+	"google.golang.org/grpc/attributes"
 	"google.golang.org/grpc/internal"
 )
 
@@ -50,6 +52,50 @@ type PerRPCCredentials interface {
 	RequireTransportSecurity() bool
 }
 
+// SecurityLevel defines the protection level on an established connection.
+//
+// This API is experimental.
+type SecurityLevel int
+
+const (
+	// InvalidSecurityLevel indicates an invalid security level.
+	// The zero SecurityLevel value is invalid for backward compatibility.
+	InvalidSecurityLevel SecurityLevel = iota
+	// NoSecurity indicates a connection is insecure.
+	NoSecurity
+	// IntegrityOnly indicates a connection only provides integrity protection.
+	IntegrityOnly
+	// PrivacyAndIntegrity indicates a connection provides both privacy and integrity protection.
+	PrivacyAndIntegrity
+)
+
+// String returns SecurityLevel in a string format.
+func (s SecurityLevel) String() string {
+	switch s {
+	case NoSecurity:
+		return "NoSecurity"
+	case IntegrityOnly:
+		return "IntegrityOnly"
+	case PrivacyAndIntegrity:
+		return "PrivacyAndIntegrity"
+	}
+	return fmt.Sprintf("invalid SecurityLevel: %v", int(s))
+}
+
+// CommonAuthInfo contains authenticated information common to AuthInfo implementations.
+// It should be embedded in a struct implementing AuthInfo to provide additional information
+// about the credentials.
+//
+// This API is experimental.
+type CommonAuthInfo struct {
+	SecurityLevel SecurityLevel
+}
+
+// GetCommonAuthInfo returns the pointer to CommonAuthInfo struct.
+func (c CommonAuthInfo) GetCommonAuthInfo() CommonAuthInfo {
+	return c
+}
+
 // ProtocolInfo provides information regarding the gRPC wire protocol version,
 // security protocol, security protocol version in use, server name, etc.
 type ProtocolInfo struct {
@@ -57,13 +103,19 @@ type ProtocolInfo struct {
 	ProtocolVersion string
 	// SecurityProtocol is the security protocol in use.
 	SecurityProtocol string
-	// SecurityVersion is the security protocol version.
+	// SecurityVersion is the security protocol version.  It is a static version string from the
+	// credentials, not a value that reflects per-connection protocol negotiation.  To retrieve
+	// details about the credentials used for a connection, use the Peer's AuthInfo field instead.
+	//
+	// Deprecated: please use Peer.AuthInfo.
 	SecurityVersion string
 	// ServerName is the user-configured server name.
 	ServerName string
 }
 
 // AuthInfo defines the common interface for the auth information the users are interested in.
+// A struct that implements AuthInfo should embed CommonAuthInfo by including additional
+// information about the credentials in it.
 type AuthInfo interface {
 	AuthType() string
 }
@@ -75,20 +127,25 @@ var ErrConnDispatched = errors.New("credentials: rawConn is dispatched out of gR
 // TransportCredentials defines the common interface for all the live gRPC wire
 // protocols and supported transport security protocols (e.g., TLS, SSL).
 type TransportCredentials interface {
-	// ClientHandshake does the authentication handshake specified by the corresponding
-	// authentication protocol on rawConn for clients. It returns the authenticated
-	// connection and the corresponding auth information about the connection.
-	// Implementations must use the provided context to implement timely cancellation.
-	// gRPC will try to reconnect if the error returned is a temporary error
-	// (io.EOF, context.DeadlineExceeded or err.Temporary() == true).
-	// If the returned error is a wrapper error, implementations should make sure that
+	// ClientHandshake does the authentication handshake specified by the
+	// corresponding authentication protocol on rawConn for clients. It returns
+	// the authenticated connection and the corresponding auth information
+	// about the connection.  The auth information should embed CommonAuthInfo
+	// to return additional information about the credentials. Implementations
+	// must use the provided context to implement timely cancellation.  gRPC
+	// will try to reconnect if the error returned is a temporary error
+	// (io.EOF, context.DeadlineExceeded or err.Temporary() == true).  If the
+	// returned error is a wrapper error, implementations should make sure that
 	// the error implements Temporary() to have the correct retry behaviors.
+	// Additionally, ClientHandshakeInfo data will be available via the context
+	// passed to this call.
 	//
 	// If the returned net.Conn is closed, it MUST close the net.Conn provided.
 	ClientHandshake(context.Context, string, net.Conn) (net.Conn, AuthInfo, error)
 	// ServerHandshake does the authentication handshake for servers. It returns
 	// the authenticated connection and the corresponding auth information about
-	// the connection.
+	// the connection. The auth information should embed CommonAuthInfo to return additional information
+	// about the credentials.
 	//
 	// If the returned net.Conn is closed, it MUST close the net.Conn provided.
 	ServerHandshake(net.Conn) (net.Conn, AuthInfo, error)
@@ -127,6 +184,8 @@ type Bundle interface {
 type RequestInfo struct {
 	// The method passed to Invoke or NewStream for this RPC. (For proto methods, this has the format "/some.Service/Method")
 	Method string
+	// AuthInfo contains the information from a security handshake (TransportCredentials.ClientHandshake, TransportCredentials.ServerHandshake)
+	AuthInfo AuthInfo
 }
 
 // requestInfoKey is a struct to be used as the key when attaching a RequestInfo to a context object.
@@ -140,10 +199,63 @@ func RequestInfoFromContext(ctx context.Context) (ri RequestInfo, ok bool) {
 	return
 }
 
+// ClientHandshakeInfo holds data to be passed to ClientHandshake. This makes
+// it possible to pass arbitrary data to the handshaker from gRPC, resolver,
+// balancer etc. Individual credential implementations control the actual
+// format of the data that they are willing to receive.
+//
+// This API is experimental.
+type ClientHandshakeInfo struct {
+	// Attributes contains the attributes for the address. It could be provided
+	// by the gRPC, resolver, balancer etc.
+	Attributes *attributes.Attributes
+}
+
+// clientHandshakeInfoKey is a struct used as the key to store
+// ClientHandshakeInfo in a context.
+type clientHandshakeInfoKey struct{}
+
+// ClientHandshakeInfoFromContext returns the ClientHandshakeInfo struct stored
+// in ctx.
+//
+// This API is experimental.
+func ClientHandshakeInfoFromContext(ctx context.Context) ClientHandshakeInfo {
+	chi, _ := ctx.Value(clientHandshakeInfoKey{}).(ClientHandshakeInfo)
+	return chi
+}
+
+// CheckSecurityLevel checks if a connection's security level is greater than or equal to the specified one.
+// It returns success if 1) the condition is satisified or 2) AuthInfo struct does not implement GetCommonAuthInfo() method
+// or 3) CommonAuthInfo.SecurityLevel has an invalid zero value. For 2) and 3), it is for the purpose of backward-compatibility.
+//
+// This API is experimental.
+func CheckSecurityLevel(ai AuthInfo, level SecurityLevel) error {
+	type internalInfo interface {
+		GetCommonAuthInfo() CommonAuthInfo
+	}
+	if ai == nil {
+		return errors.New("AuthInfo is nil")
+	}
+	if ci, ok := ai.(internalInfo); ok {
+		// CommonAuthInfo.SecurityLevel has an invalid value.
+		if ci.GetCommonAuthInfo().SecurityLevel == InvalidSecurityLevel {
+			return nil
+		}
+		if ci.GetCommonAuthInfo().SecurityLevel < level {
+			return fmt.Errorf("requires SecurityLevel %v; connection has %v", level, ci.GetCommonAuthInfo().SecurityLevel)
+		}
+	}
+	// The condition is satisfied or AuthInfo struct does not implement GetCommonAuthInfo() method.
+	return nil
+}
+
 func init() {
 	internal.NewRequestInfoContext = func(ctx context.Context, ri RequestInfo) context.Context {
 		return context.WithValue(ctx, requestInfoKey{}, ri)
 	}
+	internal.NewClientHandshakeInfoContext = func(ctx context.Context, chi ClientHandshakeInfo) context.Context {
+		return context.WithValue(ctx, clientHandshakeInfoKey{}, chi)
+	}
 }
 
 // ChannelzSecurityInfo defines the interface that security protocols should implement

vendor/google.golang.org/grpc/credentials/internal/syscallconn.go

@@ -1,61 +0,0 @@
-// +build !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 internal contains credentials-internal code.
-package internal
-
-import (
-	"net"
-	"syscall"
-)
-
-type sysConn = syscall.Conn
-
-// syscallConn keeps reference of rawConn to support syscall.Conn for channelz.
-// SyscallConn() (the method in interface syscall.Conn) is explicitly
-// implemented on this type,
-//
-// Interface syscall.Conn is implemented by most net.Conn implementations (e.g.
-// TCPConn, UnixConn), but is not part of net.Conn interface. So wrapper conns
-// that embed net.Conn don't implement syscall.Conn. (Side note: tls.Conn
-// doesn't embed net.Conn, so even if syscall.Conn is part of net.Conn, it won't
-// help here).
-type syscallConn struct {
-	net.Conn
-	// sysConn is a type alias of syscall.Conn. It's necessary because the name
-	// `Conn` collides with `net.Conn`.
-	sysConn
-}
-
-// WrapSyscallConn tries to wrap rawConn and newConn into a net.Conn that
-// implements syscall.Conn. rawConn will be used to support syscall, and newConn
-// will be used for read/write.
-//
-// This function returns newConn if rawConn doesn't implement syscall.Conn.
-func WrapSyscallConn(rawConn, newConn net.Conn) net.Conn {
-	sysConn, ok := rawConn.(syscall.Conn)
-	if !ok {
-		return newConn
-	}
-	return &syscallConn{
-		Conn:    newConn,
-		sysConn: sysConn,
-	}
-}

vendor/google.golang.org/grpc/credentials/internal/syscallconn_appengine.go

@@ -1,30 +0,0 @@
-// +build 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 internal
-
-import (
-	"net"
-)
-
-// WrapSyscallConn returns newConn on appengine.
-func WrapSyscallConn(rawConn, newConn net.Conn) net.Conn {
-	return newConn
-}

vendor/google.golang.org/grpc/credentials/tls.go

@@ -25,14 +25,18 @@ import (
 	"fmt"
 	"io/ioutil"
 	"net"
+	"net/url"
 
-	"google.golang.org/grpc/credentials/internal"
+	credinternal "google.golang.org/grpc/internal/credentials"
 )
 
 // TLSInfo contains the auth information for a TLS authenticated connection.
 // It implements the AuthInfo interface.
 type TLSInfo struct {
 	State tls.ConnectionState
+	CommonAuthInfo
+	// This API is experimental.
+	SPIFFEID *url.URL
 }
 
 // AuthType returns the type of TLSInfo as a string.
@@ -68,7 +72,7 @@ func (c tlsCreds) Info() ProtocolInfo {
 
 func (c *tlsCreds) ClientHandshake(ctx context.Context, authority string, rawConn net.Conn) (_ net.Conn, _ AuthInfo, err error) {
 	// use local cfg to avoid clobbering ServerName if using multiple endpoints
-	cfg := cloneTLSConfig(c.config)
+	cfg := credinternal.CloneTLSConfig(c.config)
 	if cfg.ServerName == "" {
 		serverName, _, err := net.SplitHostPort(authority)
 		if err != nil {
@@ -81,24 +85,48 @@ func (c *tlsCreds) ClientHandshake(ctx context.Context, authority string, rawCon
 	errChannel := make(chan error, 1)
 	go func() {
 		errChannel <- conn.Handshake()
+		close(errChannel)
 	}()
 	select {
 	case err := <-errChannel:
 		if err != nil {
+			conn.Close()
 			return nil, nil, err
 		}
 	case <-ctx.Done():
+		conn.Close()
 		return nil, nil, ctx.Err()
 	}
-	return internal.WrapSyscallConn(rawConn, conn), TLSInfo{conn.ConnectionState()}, nil
+	tlsInfo := TLSInfo{
+		State: conn.ConnectionState(),
+		CommonAuthInfo: CommonAuthInfo{
+			SecurityLevel: PrivacyAndIntegrity,
+		},
+	}
+	id := credinternal.SPIFFEIDFromState(conn.ConnectionState())
+	if id != nil {
+		tlsInfo.SPIFFEID = id
+	}
+	return credinternal.WrapSyscallConn(rawConn, conn), tlsInfo, nil
 }
 
 func (c *tlsCreds) ServerHandshake(rawConn net.Conn) (net.Conn, AuthInfo, error) {
 	conn := tls.Server(rawConn, c.config)
 	if err := conn.Handshake(); err != nil {
+		conn.Close()
 		return nil, nil, err
 	}
-	return internal.WrapSyscallConn(rawConn, conn), TLSInfo{conn.ConnectionState()}, nil
+	tlsInfo := TLSInfo{
+		State: conn.ConnectionState(),
+		CommonAuthInfo: CommonAuthInfo{
+			SecurityLevel: PrivacyAndIntegrity,
+		},
+	}
+	id := credinternal.SPIFFEIDFromState(conn.ConnectionState())
+	if id != nil {
+		tlsInfo.SPIFFEID = id
+	}
+	return credinternal.WrapSyscallConn(rawConn, conn), tlsInfo, nil
 }
 
 func (c *tlsCreds) Clone() TransportCredentials {
@@ -110,36 +138,33 @@ func (c *tlsCreds) OverrideServerName(serverNameOverride string) error {
 	return nil
 }
 
-const alpnProtoStrH2 = "h2"
-
-func appendH2ToNextProtos(ps []string) []string {
-	for _, p := range ps {
-		if p == alpnProtoStrH2 {
-			return ps
-		}
-	}
-	ret := make([]string, 0, len(ps)+1)
-	ret = append(ret, ps...)
-	return append(ret, alpnProtoStrH2)
-}
-
 // NewTLS uses c to construct a TransportCredentials based on TLS.
 func NewTLS(c *tls.Config) TransportCredentials {
-	tc := &tlsCreds{cloneTLSConfig(c)}
-	tc.config.NextProtos = appendH2ToNextProtos(tc.config.NextProtos)
+	tc := &tlsCreds{credinternal.CloneTLSConfig(c)}
+	tc.config.NextProtos = credinternal.AppendH2ToNextProtos(tc.config.NextProtos)
 	return tc
 }
 
-// NewClientTLSFromCert constructs TLS credentials from the input certificate for client.
+// NewClientTLSFromCert constructs TLS credentials from the provided root
+// certificate authority certificate(s) to validate server connections. If
+// certificates to establish the identity of the client need to be included in
+// the credentials (eg: for mTLS), use NewTLS instead, where a complete
+// tls.Config can be specified.
 // serverNameOverride is for testing only. If set to a non empty string,
-// it will override the virtual host name of authority (e.g. :authority header field) in requests.
+// it will override the virtual host name of authority (e.g. :authority header
+// field) in requests.
 func NewClientTLSFromCert(cp *x509.CertPool, serverNameOverride string) TransportCredentials {
 	return NewTLS(&tls.Config{ServerName: serverNameOverride, RootCAs: cp})
 }
 
-// NewClientTLSFromFile constructs TLS credentials from the input certificate file for client.
+// NewClientTLSFromFile constructs TLS credentials from the provided root
+// certificate authority certificate file(s) to validate server connections. If
+// certificates to establish the identity of the client need to be included in
+// the credentials (eg: for mTLS), use NewTLS instead, where a complete
+// tls.Config can be specified.
 // serverNameOverride is for testing only. If set to a non empty string,
-// it will override the virtual host name of authority (e.g. :authority header field) in requests.
+// it will override the virtual host name of authority (e.g. :authority header
+// field) in requests.
 func NewClientTLSFromFile(certFile, serverNameOverride string) (TransportCredentials, error) {
 	b, err := ioutil.ReadFile(certFile)
 	if err != nil {
@@ -170,7 +195,10 @@ func NewServerTLSFromFile(certFile, keyFile string) (TransportCredentials, error
 // TLSChannelzSecurityValue defines the struct that TLS protocol should return
 // from GetSecurityValue(), containing security info like cipher and certificate used.
 //
-// This API is EXPERIMENTAL.
+// Experimental
+//
+// Notice: This type is EXPERIMENTAL and may be changed or removed in a
+// later release.
 type TLSChannelzSecurityValue struct {
 	ChannelzSecurityValue
 	StandardName      string
@@ -203,18 +231,3 @@ var cipherSuiteLookup = map[uint16]string{
 	tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305:    "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305",
 	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.
-//
-// If cfg is nil, a new zero tls.Config is returned.
-//
-// TODO: inline this function if possible.
-func cloneTLSConfig(cfg *tls.Config) *tls.Config {
-	if cfg == nil {
-		return &tls.Config{}
-	}
-
-	return cfg.Clone()
-}