357 lines
11 KiB
Go
357 lines
11 KiB
Go
package main
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import (
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"context"
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"crypto/tls"
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"crypto/x509"
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"errors"
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"fmt"
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"io/ioutil"
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"net"
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"net/http"
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"os"
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"strings"
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"time"
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"github.com/ghodss/yaml"
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grpcprometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"github.com/sirupsen/logrus"
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"github.com/spf13/cobra"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials"
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"github.com/dexidp/dex/api"
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"github.com/dexidp/dex/pkg/log"
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"github.com/dexidp/dex/server"
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"github.com/dexidp/dex/storage"
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)
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func commandServe() *cobra.Command {
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return &cobra.Command{
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Use: "serve [ config file ]",
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Short: "Connect to the storage and begin serving requests.",
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Long: ``,
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Example: "dex serve config.yaml",
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Run: func(cmd *cobra.Command, args []string) {
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if err := serve(cmd, args); err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(2)
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}
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},
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}
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}
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func serve(cmd *cobra.Command, args []string) error {
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switch len(args) {
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default:
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return errors.New("surplus arguments")
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case 0:
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// TODO(ericchiang): Consider having a default config file location.
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return errors.New("no arguments provided")
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case 1:
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}
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configFile := args[0]
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configData, err := ioutil.ReadFile(configFile)
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if err != nil {
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return fmt.Errorf("failed to read config file %s: %v", configFile, err)
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}
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var c Config
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if err := yaml.Unmarshal(configData, &c); err != nil {
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return fmt.Errorf("error parse config file %s: %v", configFile, err)
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}
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logger, err := newLogger(c.Logger.Level, c.Logger.Format)
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if err != nil {
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return fmt.Errorf("invalid config: %v", err)
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}
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if c.Logger.Level != "" {
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logger.Infof("config using log level: %s", c.Logger.Level)
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}
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// Fast checks. Perform these first for a more responsive CLI.
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checks := []struct {
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bad bool
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errMsg string
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}{
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{c.Issuer == "", "no issuer specified in config file"},
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{!c.EnablePasswordDB && len(c.StaticPasswords) != 0, "cannot specify static passwords without enabling password db"},
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{c.Storage.Config == nil, "no storage supplied in config file"},
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{c.Web.HTTP == "" && c.Web.HTTPS == "", "must supply a HTTP/HTTPS address to listen on"},
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{c.Web.HTTPS != "" && c.Web.TLSCert == "", "no cert specified for HTTPS"},
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{c.Web.HTTPS != "" && c.Web.TLSKey == "", "no private key specified for HTTPS"},
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{c.GRPC.TLSCert != "" && c.GRPC.Addr == "", "no address specified for gRPC"},
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{c.GRPC.TLSKey != "" && c.GRPC.Addr == "", "no address specified for gRPC"},
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{(c.GRPC.TLSCert == "") != (c.GRPC.TLSKey == ""), "must specific both a gRPC TLS cert and key"},
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{c.GRPC.TLSCert == "" && c.GRPC.TLSClientCA != "", "cannot specify gRPC TLS client CA without a gRPC TLS cert"},
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}
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for _, check := range checks {
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if check.bad {
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return fmt.Errorf("invalid config: %s", check.errMsg)
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}
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}
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logger.Infof("config issuer: %s", c.Issuer)
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prometheusRegistry := prometheus.NewRegistry()
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err = prometheusRegistry.Register(prometheus.NewGoCollector())
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if err != nil {
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return fmt.Errorf("failed to register Go runtime metrics: %v", err)
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}
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err = prometheusRegistry.Register(prometheus.NewProcessCollector(os.Getpid(), ""))
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if err != nil {
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return fmt.Errorf("failed to register process metrics: %v", err)
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}
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grpcMetrics := grpcprometheus.NewServerMetrics()
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err = prometheusRegistry.Register(grpcMetrics)
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if err != nil {
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return fmt.Errorf("failed to register gRPC server metrics: %v", err)
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}
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var grpcOptions []grpc.ServerOption
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if c.GRPC.TLSCert != "" {
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// Parse certificates from certificate file and key file for server.
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cert, err := tls.LoadX509KeyPair(c.GRPC.TLSCert, c.GRPC.TLSKey)
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if err != nil {
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return fmt.Errorf("invalid config: error parsing gRPC certificate file: %v", err)
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}
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tlsConfig := tls.Config{
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Certificates: []tls.Certificate{cert},
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MinVersion: tls.VersionTLS12,
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PreferServerCipherSuites: true,
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}
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if c.GRPC.TLSClientCA != "" {
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// Parse certificates from client CA file to a new CertPool.
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cPool := x509.NewCertPool()
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clientCert, err := ioutil.ReadFile(c.GRPC.TLSClientCA)
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if err != nil {
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return fmt.Errorf("invalid config: reading from client CA file: %v", err)
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}
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if cPool.AppendCertsFromPEM(clientCert) != true {
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return errors.New("invalid config: failed to parse client CA")
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}
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tlsConfig.ClientAuth = tls.RequireAndVerifyClientCert
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tlsConfig.ClientCAs = cPool
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// Only add metrics if client auth is enabled
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grpcOptions = append(grpcOptions,
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grpc.StreamInterceptor(grpcMetrics.StreamServerInterceptor()),
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grpc.UnaryInterceptor(grpcMetrics.UnaryServerInterceptor()),
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)
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}
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grpcOptions = append(grpcOptions, grpc.Creds(credentials.NewTLS(&tlsConfig)))
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}
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s, err := c.Storage.Config.Open(logger)
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if err != nil {
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return fmt.Errorf("failed to initialize storage: %v", err)
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}
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logger.Infof("config storage: %s", c.Storage.Type)
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if len(c.StaticClients) > 0 {
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for _, client := range c.StaticClients {
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logger.Infof("config static client: %s", client.Name)
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}
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s = storage.WithStaticClients(s, c.StaticClients)
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}
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if len(c.StaticPasswords) > 0 {
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passwords := make([]storage.Password, len(c.StaticPasswords))
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for i, p := range c.StaticPasswords {
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passwords[i] = storage.Password(p)
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}
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s = storage.WithStaticPasswords(s, passwords, logger)
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}
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storageConnectors := make([]storage.Connector, len(c.StaticConnectors))
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for i, c := range c.StaticConnectors {
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if c.ID == "" || c.Name == "" || c.Type == "" {
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return fmt.Errorf("invalid config: ID, Type and Name fields are required for a connector")
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}
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if c.Config == nil {
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return fmt.Errorf("invalid config: no config field for connector %q", c.ID)
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}
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logger.Infof("config connector: %s", c.ID)
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// convert to a storage connector object
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conn, err := ToStorageConnector(c)
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if err != nil {
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return fmt.Errorf("failed to initialize storage connectors: %v", err)
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}
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storageConnectors[i] = conn
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}
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if c.EnablePasswordDB {
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storageConnectors = append(storageConnectors, storage.Connector{
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ID: server.LocalConnector,
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Name: "Email",
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Type: server.LocalConnector,
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})
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logger.Infof("config connector: local passwords enabled")
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}
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s = storage.WithStaticConnectors(s, storageConnectors)
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if len(c.OAuth2.ResponseTypes) > 0 {
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logger.Infof("config response types accepted: %s", c.OAuth2.ResponseTypes)
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}
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if c.OAuth2.SkipApprovalScreen {
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logger.Infof("config skipping approval screen")
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}
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if len(c.Web.AllowedOrigins) > 0 {
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logger.Infof("config allowed origins: %s", c.Web.AllowedOrigins)
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}
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// explicitly convert to UTC.
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now := func() time.Time { return time.Now().UTC() }
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serverConfig := server.Config{
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SupportedResponseTypes: c.OAuth2.ResponseTypes,
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SkipApprovalScreen: c.OAuth2.SkipApprovalScreen,
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AllowedOrigins: c.Web.AllowedOrigins,
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Issuer: c.Issuer,
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Storage: s,
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Web: c.Frontend,
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Logger: logger,
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Now: now,
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PrometheusRegistry: prometheusRegistry,
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}
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if c.Expiry.SigningKeys != "" {
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signingKeys, err := time.ParseDuration(c.Expiry.SigningKeys)
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if err != nil {
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return fmt.Errorf("invalid config value %q for signing keys expiry: %v", c.Expiry.SigningKeys, err)
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}
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logger.Infof("config signing keys expire after: %v", signingKeys)
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serverConfig.RotateKeysAfter = signingKeys
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}
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if c.Expiry.IDTokens != "" {
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idTokens, err := time.ParseDuration(c.Expiry.IDTokens)
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if err != nil {
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return fmt.Errorf("invalid config value %q for id token expiry: %v", c.Expiry.IDTokens, err)
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}
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logger.Infof("config id tokens valid for: %v", idTokens)
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serverConfig.IDTokensValidFor = idTokens
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}
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if c.Expiry.AuthRequests != "" {
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authRequests, err := time.ParseDuration(c.Expiry.AuthRequests)
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if err != nil {
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return fmt.Errorf("invalid config value %q for auth request expiry: %v", c.Expiry.AuthRequests, err)
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}
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logger.Infof("config auth requests valid for: %v", authRequests)
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serverConfig.AuthRequestsValidFor = authRequests
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}
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serv, err := server.NewServer(context.Background(), serverConfig)
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if err != nil {
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return fmt.Errorf("failed to initialize server: %v", err)
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}
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telemetryServ := http.NewServeMux()
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telemetryServ.Handle("/metrics", promhttp.HandlerFor(prometheusRegistry, promhttp.HandlerOpts{}))
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errc := make(chan error, 3)
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if c.Telemetry.HTTP != "" {
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logger.Infof("listening (http/telemetry) on %s", c.Telemetry.HTTP)
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go func() {
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err := http.ListenAndServe(c.Telemetry.HTTP, telemetryServ)
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errc <- fmt.Errorf("listening on %s failed: %v", c.Telemetry.HTTP, err)
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}()
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}
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if c.Web.HTTP != "" {
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logger.Infof("listening (http) on %s", c.Web.HTTP)
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go func() {
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err := http.ListenAndServe(c.Web.HTTP, serv)
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errc <- fmt.Errorf("listening on %s failed: %v", c.Web.HTTP, err)
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}()
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}
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if c.Web.HTTPS != "" {
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httpsSrv := &http.Server{
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Addr: c.Web.HTTPS,
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Handler: serv,
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TLSConfig: &tls.Config{
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PreferServerCipherSuites: true,
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MinVersion: tls.VersionTLS12,
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},
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}
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logger.Infof("listening (https) on %s", c.Web.HTTPS)
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go func() {
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err = httpsSrv.ListenAndServeTLS(c.Web.TLSCert, c.Web.TLSKey)
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errc <- fmt.Errorf("listening on %s failed: %v", c.Web.HTTPS, err)
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}()
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}
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if c.GRPC.Addr != "" {
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logger.Infof("listening (grpc) on %s", c.GRPC.Addr)
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go func() {
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errc <- func() error {
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list, err := net.Listen("tcp", c.GRPC.Addr)
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if err != nil {
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return fmt.Errorf("listening on %s failed: %v", c.GRPC.Addr, err)
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}
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s := grpc.NewServer(grpcOptions...)
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api.RegisterDexServer(s, server.NewAPI(serverConfig.Storage, logger))
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grpcMetrics.InitializeMetrics(s)
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err = s.Serve(list)
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return fmt.Errorf("listening on %s failed: %v", c.GRPC.Addr, err)
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}()
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}()
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}
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return <-errc
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}
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var (
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logLevels = []string{"debug", "info", "error"}
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logFormats = []string{"json", "text"}
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)
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type utcFormatter struct {
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f logrus.Formatter
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}
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func (f *utcFormatter) Format(e *logrus.Entry) ([]byte, error) {
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e.Time = e.Time.UTC()
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return f.f.Format(e)
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}
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func newLogger(level string, format string) (log.Logger, error) {
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var logLevel logrus.Level
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switch strings.ToLower(level) {
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case "debug":
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logLevel = logrus.DebugLevel
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case "", "info":
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logLevel = logrus.InfoLevel
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case "error":
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logLevel = logrus.ErrorLevel
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default:
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return nil, fmt.Errorf("log level is not one of the supported values (%s): %s", strings.Join(logLevels, ", "), level)
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}
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var formatter utcFormatter
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switch strings.ToLower(format) {
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case "", "text":
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formatter.f = &logrus.TextFormatter{DisableColors: true}
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case "json":
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formatter.f = &logrus.JSONFormatter{}
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default:
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return nil, fmt.Errorf("log format is not one of the supported values (%s): %s", strings.Join(logFormats, ", "), format)
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}
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return &logrus.Logger{
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Out: os.Stderr,
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Formatter: &formatter,
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Level: logLevel,
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}, nil
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}
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