dex/cmd/dex-overlord/main.go
Bobby Rullo 55040c55fa server, integration, cmd: Protect Admin API
Admin API now requires a 128 byte base64 encoded secret to be passed in
Authorization header, closing up a potential security hole for those
who expose this service.
2015-10-01 13:15:45 -07:00

146 lines
4.1 KiB
Go

package main
import (
"expvar"
"flag"
"fmt"
"net/http"
"net/url"
"os"
"time"
"github.com/coreos/go-oidc/key"
"github.com/coreos/dex/admin"
"github.com/coreos/dex/db"
pflag "github.com/coreos/dex/pkg/flag"
"github.com/coreos/dex/pkg/log"
ptime "github.com/coreos/dex/pkg/time"
"github.com/coreos/dex/server"
"github.com/coreos/dex/user"
)
var version = "DEV"
func init() {
expvar.NewString("dex.version").Set(version)
}
func main() {
fs := flag.NewFlagSet("dex-overlord", flag.ExitOnError)
keySecrets := pflag.NewBase64List(32)
fs.Var(keySecrets, "key-secrets", "A comma-separated list of base64 encoded 32 byte strings used as symmetric keys used to encrypt/decrypt signing key data in DB. The first key is considered the active key and used for encryption, while the others are used to decrypt.")
dbURL := fs.String("db-url", "", "DSN-formatted database connection string")
dbMigrate := fs.Bool("db-migrate", true, "perform database migrations when starting up overlord. This includes the initial DB objects creation.")
keyPeriod := fs.Duration("key-period", 24*time.Hour, "length of time for-which a given key will be valid")
gcInterval := fs.Duration("gc-interval", time.Hour, "length of time between garbage collection runs")
adminListen := fs.String("admin-listen", "http://127.0.0.1:5557", "scheme, host and port for listening for administrative operation requests ")
adminAPISecret := pflag.NewBase64(server.AdminAPISecretLength)
fs.Var(adminAPISecret, "admin-api-secret", fmt.Sprintf("A base64-encoded %d byte string which is used to protect the Admin API.", server.AdminAPISecretLength))
localConnectorID := fs.String("local-connector", "local", "ID of the local connector")
logDebug := fs.Bool("log-debug", false, "log debug-level information")
logTimestamps := fs.Bool("log-timestamps", false, "prefix log lines with timestamps")
if err := fs.Parse(os.Args[1:]); err != nil {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(1)
}
if err := pflag.SetFlagsFromEnv(fs, "DEX_OVERLORD"); err != nil {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(1)
}
if *logDebug {
log.EnableDebug()
}
if *logTimestamps {
log.EnableTimestamps()
}
adminURL, err := url.Parse(*adminListen)
if err != nil {
log.Fatalf("Unable to use --admin-listen flag: %v", err)
}
dbCfg := db.Config{
DSN: *dbURL,
MaxIdleConnections: 1,
MaxOpenConnections: 1,
}
dbc, err := db.NewConnection(dbCfg)
if err != nil {
log.Fatalf(err.Error())
}
if *dbMigrate {
var sleep time.Duration
for {
var err error
var migrations int
if migrations, err = db.MigrateToLatest(dbc); err == nil {
log.Infof("Performed %d db migrations", migrations)
break
}
sleep = ptime.ExpBackoff(sleep, time.Minute)
log.Errorf("Unable to migrate database, retrying in %v: %v", sleep, err)
time.Sleep(sleep)
}
}
userRepo := db.NewUserRepo(dbc)
pwiRepo := db.NewPasswordInfoRepo(dbc)
userManager := user.NewManager(userRepo,
pwiRepo, db.TransactionFactory(dbc), user.ManagerOptions{})
adminAPI := admin.NewAdminAPI(userManager, userRepo, pwiRepo, *localConnectorID)
kRepo, err := db.NewPrivateKeySetRepo(dbc, keySecrets.BytesSlice()...)
if err != nil {
log.Fatalf(err.Error())
}
var sleep time.Duration
for {
var done bool
_, err := kRepo.Get()
switch err {
case nil:
done = true
case key.ErrorNoKeys:
done = true
case db.ErrorCannotDecryptKeys:
log.Fatalf("Cannot decrypt keys using any of the given key secrets. The key secrets must be changed to include one that can decrypt the existing keys, or the existing keys must be deleted.")
}
if done {
break
}
sleep = ptime.ExpBackoff(sleep, time.Minute)
log.Errorf("Unable to get keys from repository, retrying in %v: %v", sleep, err)
time.Sleep(sleep)
}
krot := key.NewPrivateKeyRotator(kRepo, *keyPeriod)
s := server.NewAdminServer(adminAPI, krot, adminAPISecret.String())
h := s.HTTPHandler()
httpsrv := &http.Server{
Addr: adminURL.Host,
Handler: h,
}
gc := db.NewGarbageCollector(dbc, *gcInterval)
log.Infof("Binding to %s...", httpsrv.Addr)
go func() {
log.Fatal(httpsrv.ListenAndServe())
}()
gc.Run()
<-krot.Run()
}