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serve.go
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serve.go
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package main
import (
"context"
"crypto/tls"
"crypto/x509"
"errors"
"fmt"
"io/ioutil"
"net"
"net/http"
"os"
"strings"
"time"
"github.com/Sirupsen/logrus"
"github.com/ghodss/yaml"
"github.com/spf13/cobra"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"github.com/coreos/dex/api"
"github.com/coreos/dex/server"
"github.com/coreos/dex/storage"
)
func commandServe() *cobra.Command {
return &cobra.Command{
Use: "serve [ config file ]",
Short: "Connect to the storage and begin serving requests.",
Long: ``,
Example: "dex serve config.yaml",
Run: func(cmd *cobra.Command, args []string) {
if err := serve(cmd, args); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(2)
}
},
}
}
func serve(cmd *cobra.Command, args []string) error {
switch len(args) {
default:
return errors.New("surplus arguments")
case 0:
// TODO(ericchiang): Consider having a default config file location.
return errors.New("no arguments provided")
case 1:
}
configFile := args[0]
configData, err := ioutil.ReadFile(configFile)
if err != nil {
return fmt.Errorf("failed to read config file %s: %v", configFile, err)
}
var c Config
if err := yaml.Unmarshal(configData, &c); err != nil {
return fmt.Errorf("error parse config file %s: %v", configFile, err)
}
logger, err := newLogger(c.Logger.Level, c.Logger.Format)
if err != nil {
return fmt.Errorf("invalid config: %v", err)
}
if c.Logger.Level != "" {
logger.Infof("config using log level: %s", c.Logger.Level)
}
// Fast checks. Perform these first for a more responsive CLI.
checks := []struct {
bad bool
errMsg string
}{
{c.Issuer == "", "no issuer specified in config file"},
{len(c.Connectors) == 0 && !c.EnablePasswordDB, "no connectors supplied in config file"},
{!c.EnablePasswordDB && len(c.StaticPasswords) != 0, "cannot specify static passwords without enabling password db"},
{c.Storage.Config == nil, "no storage suppied in config file"},
{c.Web.HTTP == "" && c.Web.HTTPS == "", "must supply a HTTP/HTTPS address to listen on"},
{c.Web.HTTPS != "" && c.Web.TLSCert == "", "no cert specified for HTTPS"},
{c.Web.HTTPS != "" && c.Web.TLSKey == "", "no private key specified for HTTPS"},
{c.GRPC.TLSCert != "" && c.GRPC.Addr == "", "no address specified for gRPC"},
{c.GRPC.TLSKey != "" && c.GRPC.Addr == "", "no address specified for gRPC"},
{(c.GRPC.TLSCert == "") != (c.GRPC.TLSKey == ""), "must specific both a gRPC TLS cert and key"},
{c.GRPC.TLSCert == "" && c.GRPC.TLSClientCA != "", "cannot specify gRPC TLS client CA without a gRPC TLS cert"},
}
for _, check := range checks {
if check.bad {
return fmt.Errorf("invalid config: %s", check.errMsg)
}
}
logger.Infof("config issuer: %s", c.Issuer)
var grpcOptions []grpc.ServerOption
if c.GRPC.TLSCert != "" {
if c.GRPC.TLSClientCA != "" {
// Parse certificates from certificate file and key file for server.
cert, err := tls.LoadX509KeyPair(c.GRPC.TLSCert, c.GRPC.TLSKey)
if err != nil {
return fmt.Errorf("invalid config: error parsing gRPC certificate file: %v", err)
}
// Parse certificates from client CA file to a new CertPool.
cPool := x509.NewCertPool()
clientCert, err := ioutil.ReadFile(c.GRPC.TLSClientCA)
if err != nil {
return fmt.Errorf("invalid config: reading from client CA file: %v", err)
}
if cPool.AppendCertsFromPEM(clientCert) != true {
return errors.New("invalid config: failed to parse client CA")
}
tlsConfig := tls.Config{
Certificates: []tls.Certificate{cert},
ClientAuth: tls.RequireAndVerifyClientCert,
ClientCAs: cPool,
}
grpcOptions = append(grpcOptions, grpc.Creds(credentials.NewTLS(&tlsConfig)))
} else {
opt, err := credentials.NewServerTLSFromFile(c.GRPC.TLSCert, c.GRPC.TLSKey)
if err != nil {
return fmt.Errorf("invalid config: load grpc certs: %v", err)
}
grpcOptions = append(grpcOptions, grpc.Creds(opt))
}
}
connectors := make([]server.Connector, len(c.Connectors))
for i, conn := range c.Connectors {
if conn.ID == "" {
return fmt.Errorf("invalid config: no ID field for connector %d", i)
}
if conn.Config == nil {
return fmt.Errorf("invalid config: no config field for connector %q", conn.ID)
}
if conn.Name == "" {
return fmt.Errorf("invalid config: no Name field for connector %q", conn.ID)
}
logger.Infof("config connector: %s", conn.ID)
connectorLogger := logger.WithField("connector", conn.Name)
c, err := conn.Config.Open(connectorLogger)
if err != nil {
return fmt.Errorf("failed to create connector %s: %v", conn.ID, err)
}
connectors[i] = server.Connector{
ID: conn.ID,
DisplayName: conn.Name,
Connector: c,
}
}
if c.EnablePasswordDB {
logger.Infof("config connector: local passwords enabled")
}
s, err := c.Storage.Config.Open(logger)
if err != nil {
return fmt.Errorf("failed to initialize storage: %v", err)
}
logger.Infof("config storage: %s", c.Storage.Type)
if len(c.StaticClients) > 0 {
for _, client := range c.StaticClients {
logger.Infof("config static client: %s", client.ID)
}
s = storage.WithStaticClients(s, c.StaticClients)
}
if len(c.StaticPasswords) > 0 {
passwords := make([]storage.Password, len(c.StaticPasswords))
for i, p := range c.StaticPasswords {
passwords[i] = storage.Password(p)
}
s = storage.WithStaticPasswords(s, passwords)
}
if len(c.OAuth2.ResponseTypes) > 0 {
logger.Infof("config response types accepted: %s", c.OAuth2.ResponseTypes)
}
if c.OAuth2.SkipApprovalScreen {
logger.Infof("config skipping approval screen")
}
if len(c.Web.AllowedOrigins) > 0 {
logger.Infof("config allowed origins: %s", c.Web.AllowedOrigins)
}
// explicitly convert to UTC.
now := func() time.Time { return time.Now().UTC() }
serverConfig := server.Config{
SupportedResponseTypes: c.OAuth2.ResponseTypes,
SkipApprovalScreen: c.OAuth2.SkipApprovalScreen,
AllowedOrigins: c.Web.AllowedOrigins,
Issuer: c.Issuer,
Connectors: connectors,
Storage: s,
Web: c.Frontend,
EnablePasswordDB: c.EnablePasswordDB,
Logger: logger,
Now: now,
}
if c.Expiry.SigningKeys != "" {
signingKeys, err := time.ParseDuration(c.Expiry.SigningKeys)
if err != nil {
return fmt.Errorf("invalid config value %q for signing keys expiry: %v", c.Expiry.SigningKeys, err)
}
logger.Infof("config signing keys expire after: %v", signingKeys)
serverConfig.RotateKeysAfter = signingKeys
}
if c.Expiry.IDTokens != "" {
idTokens, err := time.ParseDuration(c.Expiry.IDTokens)
if err != nil {
return fmt.Errorf("invalid config value %q for id token expiry: %v", c.Expiry.IDTokens, err)
}
logger.Infof("config id tokens valid for: %v", idTokens)
serverConfig.IDTokensValidFor = idTokens
}
serv, err := server.NewServer(context.Background(), serverConfig)
if err != nil {
return fmt.Errorf("failed to initialize server: %v", err)
}
errc := make(chan error, 3)
if c.Web.HTTP != "" {
logger.Infof("listening (http) on %s", c.Web.HTTP)
go func() {
err := http.ListenAndServe(c.Web.HTTP, serv)
errc <- fmt.Errorf("listening on %s failed: %v", c.Web.HTTP, err)
}()
}
if c.Web.HTTPS != "" {
logger.Infof("listening (https) on %s", c.Web.HTTPS)
go func() {
err := http.ListenAndServeTLS(c.Web.HTTPS, c.Web.TLSCert, c.Web.TLSKey, serv)
errc <- fmt.Errorf("listening on %s failed: %v", c.Web.HTTPS, err)
}()
}
if c.GRPC.Addr != "" {
logger.Infof("listening (grpc) on %s", c.GRPC.Addr)
go func() {
errc <- func() error {
list, err := net.Listen("tcp", c.GRPC.Addr)
if err != nil {
return fmt.Errorf("listening on %s failed: %v", c.GRPC.Addr, err)
}
s := grpc.NewServer(grpcOptions...)
api.RegisterDexServer(s, server.NewAPI(serverConfig.Storage, logger))
err = s.Serve(list)
return fmt.Errorf("listening on %s failed: %v", c.GRPC.Addr, err)
}()
}()
}
return <-errc
}
var (
logLevels = []string{"debug", "info", "error"}
logFormats = []string{"json", "text"}
)
type utcFormatter struct {
f logrus.Formatter
}
func (f *utcFormatter) Format(e *logrus.Entry) ([]byte, error) {
e.Time = e.Time.UTC()
return f.f.Format(e)
}
func newLogger(level string, format string) (logrus.FieldLogger, error) {
var logLevel logrus.Level
switch strings.ToLower(level) {
case "debug":
logLevel = logrus.DebugLevel
case "", "info":
logLevel = logrus.InfoLevel
case "error":
logLevel = logrus.ErrorLevel
default:
return nil, fmt.Errorf("log level is not one of the supported values (%s): %s", strings.Join(logLevels, ", "), level)
}
var formatter utcFormatter
switch strings.ToLower(format) {
case "", "text":
formatter.f = &logrus.TextFormatter{DisableColors: true}
case "json":
formatter.f = &logrus.JSONFormatter{}
default:
return nil, fmt.Errorf("log format is not one of the supported values (%s): %s", strings.Join(logFormats, ", "), format)
}
return &logrus.Logger{
Out: os.Stderr,
Formatter: &formatter,
Level: logLevel,
}, nil
}