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Add aTLS endpoint to KMS (#236)

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* Move file watcher and validator to internal

* Add aTLS endpoint to KMS for Kubernetes external requests

* Update Go version in Dockerfiles

* Move most KMS packages to internal

Signed-off-by: Daniel Weiße <dw@edgeless.systems>
This commit is contained in:
Daniel Weiße 2022-06-29 16:13:01 +02:00 • committed by GitHub
parent 042f668d20
commit f9a581f329
66 changed files with 550 additions and 355 deletions
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108
kms/cmd/main.go Normal file
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package main
import (
"context"
"errors"
"flag"
"fmt"
"net"
"path/filepath"
"strconv"
"time"
"github.com/edgelesssys/constellation/internal/atls"
"github.com/edgelesssys/constellation/internal/constants"
"github.com/edgelesssys/constellation/internal/file"
"github.com/edgelesssys/constellation/internal/grpc/atlscredentials"
"github.com/edgelesssys/constellation/internal/logger"
"github.com/edgelesssys/constellation/internal/watcher"
"github.com/edgelesssys/constellation/kms/internal/server"
"github.com/edgelesssys/constellation/kms/setup"
"github.com/spf13/afero"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
func main() {
port := flag.String("port", strconv.Itoa(constants.KMSPort), "Port gRPC server listens on")
portATLS := flag.String("atls-port", strconv.Itoa(constants.KMSNodePort), "Port aTLS server listens on")
provider := flag.String("cloud-provider", "", "cloud service provider this binary is running on")
masterSecretPath := flag.String("master-secret", filepath.Join(constants.ServiceBasePath, constants.MasterSecretFilename), "Path to the Constellation master secret")
flag.Parse()
log := logger.New(logger.JSONLog, zapcore.InfoLevel)
log.With(zap.String("version", constants.VersionInfo), zap.String("cloudProvider", *provider)).
Infof("Constellation Key Management Service")
validator, err := watcher.NewValidator(log.Named("validator"), *provider, file.NewHandler(afero.NewOsFs()))
if err != nil {
flag.Usage()
log.With(zap.Error(err)).Fatalf("Failed to create validator")
}
creds := atlscredentials.New(nil, []atls.Validator{validator})
// set up Key Management Service
masterKey, err := readMainSecret(*masterSecretPath)
if err != nil {
log.With(zap.Error(err)).Fatalf("Failed to read master secret")
}
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Minute)
defer cancel()
conKMS, err := setup.SetUpKMS(ctx, setup.NoStoreURI, setup.ClusterKMSURI)
if err != nil {
log.With(zap.Error(err)).Fatalf("Failed to setup KMS")
}
if err := conKMS.CreateKEK(ctx, "Constellation", masterKey); err != nil {
log.With(zap.Error(err)).Fatalf("Failed to create KMS KEK from MasterKey")
}
// set up listeners
atlsListener, err := net.Listen("tcp", net.JoinHostPort("", *portATLS))
if err != nil {
log.With(zap.Error(err)).Fatalf("Failed to listen on port %s", *portATLS)
}
plainListener, err := net.Listen("tcp", net.JoinHostPort("", *port))
if err != nil {
log.With(zap.Error(err)).Fatalf("Failed to listen on port %s", *port)
}
// start the measurements file watcher
watcher, err := watcher.New(log.Named("fileWatcher"), validator)
if err != nil {
log.With(zap.Error(err)).Fatalf("Failed to create watcher for measurements updates")
}
defer watcher.Close()
go func() {
log.Infof("starting file watcher for measurements file %s", filepath.Join(constants.ServiceBasePath, constants.MeasurementsFilename))
if err := watcher.Watch(filepath.Join(constants.ServiceBasePath, constants.MeasurementsFilename)); err != nil {
log.With(zap.Error(err)).Fatalf("Failed to watch measurements file")
}
}()
// start the server
if err := server.New(log.Named("server"), conKMS).Run(atlsListener, plainListener, creds); err != nil {
log.With(zap.Error(err)).Fatalf("Failed to run KMS server")
}
}
// readMainSecret reads the base64 encoded main secret file from specified path and returns the secret as bytes.
func readMainSecret(fileName string) ([]byte, error) {
if fileName == "" {
return nil, errors.New("no filename to master secret provided")
}
fileHandler := file.NewHandler(afero.NewOsFs())
secretBytes, err := fileHandler.Read(fileName)
if err != nil {
return nil, err
}
if len(secretBytes) < constants.MasterSecretLengthMin {
return nil, fmt.Errorf("provided master secret is smaller than the required minimum of %d bytes", constants.MasterSecretLengthMin)
}
return secretBytes, nil
}