mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-22 16:36:27 +01:00
425 lines
14 KiB
Go
425 lines
14 KiB
Go
/*
|
|
*
|
|
* Copyright 2021 Google LLC
|
|
*
|
|
* 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
|
|
*
|
|
* https://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 s2a provides the S2A transport credentials used by a gRPC
|
|
// application.
|
|
package s2a
|
|
|
|
import (
|
|
"context"
|
|
"crypto/tls"
|
|
"errors"
|
|
"fmt"
|
|
"net"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/golang/protobuf/proto"
|
|
"github.com/google/s2a-go/fallback"
|
|
"github.com/google/s2a-go/internal/handshaker"
|
|
"github.com/google/s2a-go/internal/handshaker/service"
|
|
"github.com/google/s2a-go/internal/tokenmanager"
|
|
"github.com/google/s2a-go/internal/v2"
|
|
"github.com/google/s2a-go/retry"
|
|
"google.golang.org/grpc/credentials"
|
|
"google.golang.org/grpc/grpclog"
|
|
|
|
commonpb "github.com/google/s2a-go/internal/proto/common_go_proto"
|
|
s2av2pb "github.com/google/s2a-go/internal/proto/v2/s2a_go_proto"
|
|
)
|
|
|
|
const (
|
|
s2aSecurityProtocol = "tls"
|
|
// defaultTimeout specifies the default server handshake timeout.
|
|
defaultTimeout = 30.0 * time.Second
|
|
)
|
|
|
|
// s2aTransportCreds are the transport credentials required for establishing
|
|
// a secure connection using the S2A. They implement the
|
|
// credentials.TransportCredentials interface.
|
|
type s2aTransportCreds struct {
|
|
info *credentials.ProtocolInfo
|
|
minTLSVersion commonpb.TLSVersion
|
|
maxTLSVersion commonpb.TLSVersion
|
|
// tlsCiphersuites contains the ciphersuites used in the S2A connection.
|
|
// Note that these are currently unconfigurable.
|
|
tlsCiphersuites []commonpb.Ciphersuite
|
|
// localIdentity should only be used by the client.
|
|
localIdentity *commonpb.Identity
|
|
// localIdentities should only be used by the server.
|
|
localIdentities []*commonpb.Identity
|
|
// targetIdentities should only be used by the client.
|
|
targetIdentities []*commonpb.Identity
|
|
isClient bool
|
|
s2aAddr string
|
|
ensureProcessSessionTickets *sync.WaitGroup
|
|
}
|
|
|
|
// NewClientCreds returns a client-side transport credentials object that uses
|
|
// the S2A to establish a secure connection with a server.
|
|
func NewClientCreds(opts *ClientOptions) (credentials.TransportCredentials, error) {
|
|
if opts == nil {
|
|
return nil, errors.New("nil client options")
|
|
}
|
|
var targetIdentities []*commonpb.Identity
|
|
for _, targetIdentity := range opts.TargetIdentities {
|
|
protoTargetIdentity, err := toProtoIdentity(targetIdentity)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
targetIdentities = append(targetIdentities, protoTargetIdentity)
|
|
}
|
|
localIdentity, err := toProtoIdentity(opts.LocalIdentity)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if opts.EnableLegacyMode {
|
|
return &s2aTransportCreds{
|
|
info: &credentials.ProtocolInfo{
|
|
SecurityProtocol: s2aSecurityProtocol,
|
|
},
|
|
minTLSVersion: commonpb.TLSVersion_TLS1_3,
|
|
maxTLSVersion: commonpb.TLSVersion_TLS1_3,
|
|
tlsCiphersuites: []commonpb.Ciphersuite{
|
|
commonpb.Ciphersuite_AES_128_GCM_SHA256,
|
|
commonpb.Ciphersuite_AES_256_GCM_SHA384,
|
|
commonpb.Ciphersuite_CHACHA20_POLY1305_SHA256,
|
|
},
|
|
localIdentity: localIdentity,
|
|
targetIdentities: targetIdentities,
|
|
isClient: true,
|
|
s2aAddr: opts.S2AAddress,
|
|
ensureProcessSessionTickets: opts.EnsureProcessSessionTickets,
|
|
}, nil
|
|
}
|
|
verificationMode := getVerificationMode(opts.VerificationMode)
|
|
var fallbackFunc fallback.ClientHandshake
|
|
if opts.FallbackOpts != nil && opts.FallbackOpts.FallbackClientHandshakeFunc != nil {
|
|
fallbackFunc = opts.FallbackOpts.FallbackClientHandshakeFunc
|
|
}
|
|
return v2.NewClientCreds(opts.S2AAddress, localIdentity, verificationMode, fallbackFunc, opts.getS2AStream, opts.serverAuthorizationPolicy)
|
|
}
|
|
|
|
// NewServerCreds returns a server-side transport credentials object that uses
|
|
// the S2A to establish a secure connection with a client.
|
|
func NewServerCreds(opts *ServerOptions) (credentials.TransportCredentials, error) {
|
|
if opts == nil {
|
|
return nil, errors.New("nil server options")
|
|
}
|
|
var localIdentities []*commonpb.Identity
|
|
for _, localIdentity := range opts.LocalIdentities {
|
|
protoLocalIdentity, err := toProtoIdentity(localIdentity)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
localIdentities = append(localIdentities, protoLocalIdentity)
|
|
}
|
|
if opts.EnableLegacyMode {
|
|
return &s2aTransportCreds{
|
|
info: &credentials.ProtocolInfo{
|
|
SecurityProtocol: s2aSecurityProtocol,
|
|
},
|
|
minTLSVersion: commonpb.TLSVersion_TLS1_3,
|
|
maxTLSVersion: commonpb.TLSVersion_TLS1_3,
|
|
tlsCiphersuites: []commonpb.Ciphersuite{
|
|
commonpb.Ciphersuite_AES_128_GCM_SHA256,
|
|
commonpb.Ciphersuite_AES_256_GCM_SHA384,
|
|
commonpb.Ciphersuite_CHACHA20_POLY1305_SHA256,
|
|
},
|
|
localIdentities: localIdentities,
|
|
isClient: false,
|
|
s2aAddr: opts.S2AAddress,
|
|
}, nil
|
|
}
|
|
verificationMode := getVerificationMode(opts.VerificationMode)
|
|
return v2.NewServerCreds(opts.S2AAddress, localIdentities, verificationMode, opts.getS2AStream)
|
|
}
|
|
|
|
// ClientHandshake initiates a client-side TLS handshake using the S2A.
|
|
func (c *s2aTransportCreds) ClientHandshake(ctx context.Context, serverAuthority string, rawConn net.Conn) (net.Conn, credentials.AuthInfo, error) {
|
|
if !c.isClient {
|
|
return nil, nil, errors.New("client handshake called using server transport credentials")
|
|
}
|
|
|
|
// Connect to the S2A.
|
|
hsConn, err := service.Dial(c.s2aAddr)
|
|
if err != nil {
|
|
grpclog.Infof("Failed to connect to S2A: %v", err)
|
|
return nil, nil, err
|
|
}
|
|
|
|
var cancel context.CancelFunc
|
|
ctx, cancel = context.WithCancel(ctx)
|
|
defer cancel()
|
|
|
|
opts := &handshaker.ClientHandshakerOptions{
|
|
MinTLSVersion: c.minTLSVersion,
|
|
MaxTLSVersion: c.maxTLSVersion,
|
|
TLSCiphersuites: c.tlsCiphersuites,
|
|
TargetIdentities: c.targetIdentities,
|
|
LocalIdentity: c.localIdentity,
|
|
TargetName: serverAuthority,
|
|
EnsureProcessSessionTickets: c.ensureProcessSessionTickets,
|
|
}
|
|
chs, err := handshaker.NewClientHandshaker(ctx, hsConn, rawConn, c.s2aAddr, opts)
|
|
if err != nil {
|
|
grpclog.Infof("Call to handshaker.NewClientHandshaker failed: %v", err)
|
|
return nil, nil, err
|
|
}
|
|
defer func() {
|
|
if err != nil {
|
|
if closeErr := chs.Close(); closeErr != nil {
|
|
grpclog.Infof("Close failed unexpectedly: %v", err)
|
|
err = fmt.Errorf("%v: close unexpectedly failed: %v", err, closeErr)
|
|
}
|
|
}
|
|
}()
|
|
|
|
secConn, authInfo, err := chs.ClientHandshake(context.Background())
|
|
if err != nil {
|
|
grpclog.Infof("Handshake failed: %v", err)
|
|
return nil, nil, err
|
|
}
|
|
return secConn, authInfo, nil
|
|
}
|
|
|
|
// ServerHandshake initiates a server-side TLS handshake using the S2A.
|
|
func (c *s2aTransportCreds) ServerHandshake(rawConn net.Conn) (net.Conn, credentials.AuthInfo, error) {
|
|
if c.isClient {
|
|
return nil, nil, errors.New("server handshake called using client transport credentials")
|
|
}
|
|
|
|
// Connect to the S2A.
|
|
hsConn, err := service.Dial(c.s2aAddr)
|
|
if err != nil {
|
|
grpclog.Infof("Failed to connect to S2A: %v", err)
|
|
return nil, nil, err
|
|
}
|
|
|
|
ctx, cancel := context.WithTimeout(context.Background(), defaultTimeout)
|
|
defer cancel()
|
|
|
|
opts := &handshaker.ServerHandshakerOptions{
|
|
MinTLSVersion: c.minTLSVersion,
|
|
MaxTLSVersion: c.maxTLSVersion,
|
|
TLSCiphersuites: c.tlsCiphersuites,
|
|
LocalIdentities: c.localIdentities,
|
|
}
|
|
shs, err := handshaker.NewServerHandshaker(ctx, hsConn, rawConn, c.s2aAddr, opts)
|
|
if err != nil {
|
|
grpclog.Infof("Call to handshaker.NewServerHandshaker failed: %v", err)
|
|
return nil, nil, err
|
|
}
|
|
defer func() {
|
|
if err != nil {
|
|
if closeErr := shs.Close(); closeErr != nil {
|
|
grpclog.Infof("Close failed unexpectedly: %v", err)
|
|
err = fmt.Errorf("%v: close unexpectedly failed: %v", err, closeErr)
|
|
}
|
|
}
|
|
}()
|
|
|
|
secConn, authInfo, err := shs.ServerHandshake(context.Background())
|
|
if err != nil {
|
|
grpclog.Infof("Handshake failed: %v", err)
|
|
return nil, nil, err
|
|
}
|
|
return secConn, authInfo, nil
|
|
}
|
|
|
|
func (c *s2aTransportCreds) Info() credentials.ProtocolInfo {
|
|
return *c.info
|
|
}
|
|
|
|
func (c *s2aTransportCreds) Clone() credentials.TransportCredentials {
|
|
info := *c.info
|
|
var localIdentity *commonpb.Identity
|
|
if c.localIdentity != nil {
|
|
localIdentity = proto.Clone(c.localIdentity).(*commonpb.Identity)
|
|
}
|
|
var localIdentities []*commonpb.Identity
|
|
if c.localIdentities != nil {
|
|
localIdentities = make([]*commonpb.Identity, len(c.localIdentities))
|
|
for i, localIdentity := range c.localIdentities {
|
|
localIdentities[i] = proto.Clone(localIdentity).(*commonpb.Identity)
|
|
}
|
|
}
|
|
var targetIdentities []*commonpb.Identity
|
|
if c.targetIdentities != nil {
|
|
targetIdentities = make([]*commonpb.Identity, len(c.targetIdentities))
|
|
for i, targetIdentity := range c.targetIdentities {
|
|
targetIdentities[i] = proto.Clone(targetIdentity).(*commonpb.Identity)
|
|
}
|
|
}
|
|
return &s2aTransportCreds{
|
|
info: &info,
|
|
minTLSVersion: c.minTLSVersion,
|
|
maxTLSVersion: c.maxTLSVersion,
|
|
tlsCiphersuites: c.tlsCiphersuites,
|
|
localIdentity: localIdentity,
|
|
localIdentities: localIdentities,
|
|
targetIdentities: targetIdentities,
|
|
isClient: c.isClient,
|
|
s2aAddr: c.s2aAddr,
|
|
}
|
|
}
|
|
|
|
func (c *s2aTransportCreds) OverrideServerName(serverNameOverride string) error {
|
|
c.info.ServerName = serverNameOverride
|
|
return nil
|
|
}
|
|
|
|
// TLSClientConfigOptions specifies parameters for creating client TLS config.
|
|
type TLSClientConfigOptions struct {
|
|
// ServerName is required by s2a as the expected name when verifying the hostname found in server's certificate.
|
|
// tlsConfig, _ := factory.Build(ctx, &s2a.TLSClientConfigOptions{
|
|
// ServerName: "example.com",
|
|
// })
|
|
ServerName string
|
|
}
|
|
|
|
// TLSClientConfigFactory defines the interface for a client TLS config factory.
|
|
type TLSClientConfigFactory interface {
|
|
Build(ctx context.Context, opts *TLSClientConfigOptions) (*tls.Config, error)
|
|
}
|
|
|
|
// NewTLSClientConfigFactory returns an instance of s2aTLSClientConfigFactory.
|
|
func NewTLSClientConfigFactory(opts *ClientOptions) (TLSClientConfigFactory, error) {
|
|
if opts == nil {
|
|
return nil, fmt.Errorf("opts must be non-nil")
|
|
}
|
|
if opts.EnableLegacyMode {
|
|
return nil, fmt.Errorf("NewTLSClientConfigFactory only supports S2Av2")
|
|
}
|
|
tokenManager, err := tokenmanager.NewSingleTokenAccessTokenManager()
|
|
if err != nil {
|
|
// The only possible error is: access token not set in the environment,
|
|
// which is okay in environments other than serverless.
|
|
grpclog.Infof("Access token manager not initialized: %v", err)
|
|
return &s2aTLSClientConfigFactory{
|
|
s2av2Address: opts.S2AAddress,
|
|
tokenManager: nil,
|
|
verificationMode: getVerificationMode(opts.VerificationMode),
|
|
serverAuthorizationPolicy: opts.serverAuthorizationPolicy,
|
|
}, nil
|
|
}
|
|
return &s2aTLSClientConfigFactory{
|
|
s2av2Address: opts.S2AAddress,
|
|
tokenManager: tokenManager,
|
|
verificationMode: getVerificationMode(opts.VerificationMode),
|
|
serverAuthorizationPolicy: opts.serverAuthorizationPolicy,
|
|
}, nil
|
|
}
|
|
|
|
type s2aTLSClientConfigFactory struct {
|
|
s2av2Address string
|
|
tokenManager tokenmanager.AccessTokenManager
|
|
verificationMode s2av2pb.ValidatePeerCertificateChainReq_VerificationMode
|
|
serverAuthorizationPolicy []byte
|
|
}
|
|
|
|
func (f *s2aTLSClientConfigFactory) Build(
|
|
ctx context.Context, opts *TLSClientConfigOptions) (*tls.Config, error) {
|
|
serverName := ""
|
|
if opts != nil && opts.ServerName != "" {
|
|
serverName = opts.ServerName
|
|
}
|
|
return v2.NewClientTLSConfig(ctx, f.s2av2Address, f.tokenManager, f.verificationMode, serverName, f.serverAuthorizationPolicy)
|
|
}
|
|
|
|
func getVerificationMode(verificationMode VerificationModeType) s2av2pb.ValidatePeerCertificateChainReq_VerificationMode {
|
|
switch verificationMode {
|
|
case ConnectToGoogle:
|
|
return s2av2pb.ValidatePeerCertificateChainReq_CONNECT_TO_GOOGLE
|
|
case Spiffe:
|
|
return s2av2pb.ValidatePeerCertificateChainReq_SPIFFE
|
|
default:
|
|
return s2av2pb.ValidatePeerCertificateChainReq_UNSPECIFIED
|
|
}
|
|
}
|
|
|
|
// NewS2ADialTLSContextFunc returns a dialer which establishes an MTLS connection using S2A.
|
|
// Example use with http.RoundTripper:
|
|
//
|
|
// dialTLSContext := s2a.NewS2aDialTLSContextFunc(&s2a.ClientOptions{
|
|
// S2AAddress: s2aAddress, // required
|
|
// })
|
|
// transport := http.DefaultTransport
|
|
// transport.DialTLSContext = dialTLSContext
|
|
func NewS2ADialTLSContextFunc(opts *ClientOptions) func(ctx context.Context, network, addr string) (net.Conn, error) {
|
|
|
|
return func(ctx context.Context, network, addr string) (net.Conn, error) {
|
|
|
|
fallback := func(err error) (net.Conn, error) {
|
|
if opts.FallbackOpts != nil && opts.FallbackOpts.FallbackDialer != nil &&
|
|
opts.FallbackOpts.FallbackDialer.Dialer != nil && opts.FallbackOpts.FallbackDialer.ServerAddr != "" {
|
|
fbDialer := opts.FallbackOpts.FallbackDialer
|
|
grpclog.Infof("fall back to dial: %s", fbDialer.ServerAddr)
|
|
fbConn, fbErr := fbDialer.Dialer.DialContext(ctx, network, fbDialer.ServerAddr)
|
|
if fbErr != nil {
|
|
return nil, fmt.Errorf("error fallback to %s: %v; S2A error: %w", fbDialer.ServerAddr, fbErr, err)
|
|
}
|
|
return fbConn, nil
|
|
}
|
|
return nil, err
|
|
}
|
|
|
|
factory, err := NewTLSClientConfigFactory(opts)
|
|
if err != nil {
|
|
grpclog.Infof("error creating S2A client config factory: %v", err)
|
|
return fallback(err)
|
|
}
|
|
|
|
serverName, _, err := net.SplitHostPort(addr)
|
|
if err != nil {
|
|
serverName = addr
|
|
}
|
|
timeoutCtx, cancel := context.WithTimeout(ctx, v2.GetS2ATimeout())
|
|
defer cancel()
|
|
|
|
var s2aTLSConfig *tls.Config
|
|
retry.Run(timeoutCtx,
|
|
func() error {
|
|
s2aTLSConfig, err = factory.Build(timeoutCtx, &TLSClientConfigOptions{
|
|
ServerName: serverName,
|
|
})
|
|
return err
|
|
})
|
|
if err != nil {
|
|
grpclog.Infof("error building S2A TLS config: %v", err)
|
|
return fallback(err)
|
|
}
|
|
|
|
s2aDialer := &tls.Dialer{
|
|
Config: s2aTLSConfig,
|
|
}
|
|
var c net.Conn
|
|
retry.Run(timeoutCtx,
|
|
func() error {
|
|
c, err = s2aDialer.DialContext(timeoutCtx, network, addr)
|
|
return err
|
|
})
|
|
if err != nil {
|
|
grpclog.Infof("error dialing with S2A to %s: %v", addr, err)
|
|
return fallback(err)
|
|
}
|
|
grpclog.Infof("success dialing MTLS to %s with S2A", addr)
|
|
return c, nil
|
|
}
|
|
}
|