rename folder extensions -> services

Signed-off-by: Christian Richter <crichter@owncloud.com>

services/idp/pkg/command/server.go

@@ -0,0 +1,198 @@
+package command
+
+import (
+	"bytes"
+	"context"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+	"errors"
+	"fmt"
+	"io"
+	"io/fs"
+	"os"
+	"path/filepath"
+
+	"github.com/oklog/run"
+	"github.com/owncloud/ocis/v2/extensions/idp/pkg/config"
+	"github.com/owncloud/ocis/v2/extensions/idp/pkg/config/parser"
+	"github.com/owncloud/ocis/v2/extensions/idp/pkg/logging"
+	"github.com/owncloud/ocis/v2/extensions/idp/pkg/metrics"
+	"github.com/owncloud/ocis/v2/extensions/idp/pkg/server/debug"
+	"github.com/owncloud/ocis/v2/extensions/idp/pkg/server/http"
+	"github.com/owncloud/ocis/v2/extensions/idp/pkg/tracing"
+	"github.com/owncloud/ocis/v2/ocis-pkg/version"
+	"github.com/urfave/cli/v2"
+)
+
+const _rsaKeySize = 4096
+
+// Server is the entrypoint for the server command.
+func Server(cfg *config.Config) *cli.Command {
+	return &cli.Command{
+		Name:     "server",
+		Usage:    fmt.Sprintf("start %s extension without runtime (unsupervised mode)", cfg.Service.Name),
+		Category: "server",
+		Before: func(c *cli.Context) error {
+			err := parser.ParseConfig(cfg)
+			if err != nil {
+				fmt.Printf("%v", err)
+				os.Exit(1)
+			}
+
+			if cfg.IDP.EncryptionSecretFile != "" {
+				if err := ensureEncryptionSecretExists(cfg.IDP.EncryptionSecretFile); err != nil {
+					return err
+				}
+				if err := ensureSigningPrivateKeyExists(cfg.IDP.SigningPrivateKeyFiles); err != nil {
+					return err
+				}
+			}
+			return err
+		},
+		Action: func(c *cli.Context) error {
+			logger := logging.Configure(cfg.Service.Name, cfg.Log)
+			err := tracing.Configure(cfg)
+			if err != nil {
+				return err
+			}
+			var (
+				gr          = run.Group{}
+				ctx, cancel = func() (context.Context, context.CancelFunc) {
+					if cfg.Context == nil {
+						return context.WithCancel(context.Background())
+					}
+					return context.WithCancel(cfg.Context)
+				}()
+				metrics = metrics.New()
+			)
+
+			defer cancel()
+
+			metrics.BuildInfo.WithLabelValues(version.GetString()).Set(1)
+
+			{
+				server, err := http.Server(
+					http.Logger(logger),
+					http.Context(ctx),
+					http.Config(cfg),
+					http.Metrics(metrics),
+				)
+
+				if err != nil {
+					logger.Info().
+						Err(err).
+						Str("transport", "http").
+						Msg("Failed to initialize server")
+
+					return err
+				}
+
+				gr.Add(func() error {
+					return server.Run()
+				}, func(_ error) {
+					logger.Info().
+						Str("transport", "http").
+						Msg("Shutting down server")
+
+					cancel()
+				})
+			}
+
+			{
+				server, err := debug.Server(
+					debug.Logger(logger),
+					debug.Context(ctx),
+					debug.Config(cfg),
+				)
+
+				if err != nil {
+					logger.Info().Err(err).Str("transport", "debug").Msg("Failed to initialize server")
+					return err
+				}
+
+				gr.Add(server.ListenAndServe, func(_ error) {
+					_ = server.Shutdown(ctx)
+					cancel()
+				})
+			}
+
+			return gr.Run()
+		},
+	}
+}
+
+func ensureEncryptionSecretExists(path string) error {
+	_, err := os.Stat(path)
+	if err == nil {
+		// If the file exists we can just return
+		return nil
+	}
+	if !errors.Is(err, fs.ErrNotExist) {
+		return err
+	}
+
+	dir := filepath.Dir(path)
+	err = os.MkdirAll(dir, 0700)
+	if err != nil {
+		return err
+	}
+
+	f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0600)
+	if err != nil {
+		return nil
+	}
+	defer f.Close()
+
+	secret := make([]byte, 32)
+	_, err = rand.Read(secret)
+	if err != nil {
+		return err
+	}
+	_, err = io.Copy(f, bytes.NewReader(secret))
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func ensureSigningPrivateKeyExists(paths []string) error {
+	for _, path := range paths {
+		_, err := os.Stat(path)
+		if err == nil {
+			// If the file exists we can just return
+			return nil
+		}
+		if !errors.Is(err, fs.ErrNotExist) {
+			return err
+		}
+
+		dir := filepath.Dir(path)
+		err = os.MkdirAll(dir, 0700)
+		if err != nil {
+			return err
+		}
+
+		f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0600)
+		if err != nil {
+			return nil
+		}
+		defer f.Close()
+
+		pk, err := rsa.GenerateKey(rand.Reader, _rsaKeySize)
+		if err != nil {
+			return err
+		}
+
+		pb := &pem.Block{
+			Type:  "RSA PRIVATE KEY",
+			Bytes: x509.MarshalPKCS1PrivateKey(pk),
+		}
+		if err := pem.Encode(f, pb); err != nil {
+			return err
+		}
+	}
+	return nil
+}