repos / pico

ssh.go

  1package pico
  2
  3import (
  4	"context"
  5	"os"
  6	"os/signal"
  7	"syscall"
  8	"time"
  9
 10	"git.sr.ht/~rockorager/vaxis"
 11	"github.com/picosh/pico/pkg/db/postgres"
 12	"github.com/picosh/pico/pkg/pssh"
 13	"github.com/picosh/pico/pkg/send/auth"
 14	"github.com/picosh/pico/pkg/send/list"
 15	"github.com/picosh/pico/pkg/send/pipe"
 16	"github.com/picosh/pico/pkg/send/protocols/rsync"
 17	"github.com/picosh/pico/pkg/send/protocols/scp"
 18	"github.com/picosh/pico/pkg/send/protocols/sftp"
 19	"github.com/picosh/pico/pkg/shared"
 20	"github.com/picosh/pico/pkg/tui"
 21	"github.com/picosh/utils"
 22	"golang.org/x/crypto/ssh"
 23)
 24
 25func createTui(shrd *tui.SharedModel) pssh.SSHServerMiddleware {
 26	return func(next pssh.SSHServerHandler) pssh.SSHServerHandler {
 27		return func(sesh *pssh.SSHServerConnSession) error {
 28			vty, err := shared.NewVConsole(sesh)
 29			if err != nil {
 30				return err
 31			}
 32			opts := vaxis.Options{
 33				WithConsole: vty,
 34			}
 35			return tui.NewTui(opts, shrd)
 36		}
 37	}
 38}
 39
 40func StartSshServer() {
 41	appName := "pico-ssh"
 42
 43	host := utils.GetEnv("PICO_HOST", "0.0.0.0")
 44	port := utils.GetEnv("PICO_SSH_PORT", "2222")
 45	promPort := utils.GetEnv("PICO_PROM_PORT", "9222")
 46	cfg := NewConfigSite(appName)
 47	logger := cfg.Logger
 48
 49	ctx, cancel := context.WithCancel(context.Background())
 50	defer cancel()
 51
 52	dbpool := postgres.NewDB(cfg.DbURL, cfg.Logger)
 53	defer func() {
 54		_ = dbpool.Close()
 55	}()
 56
 57	handler := NewUploadHandler(
 58		dbpool,
 59		cfg,
 60	)
 61
 62	cliHandler := &CliHandler{
 63		Logger: logger,
 64		DBPool: dbpool,
 65	}
 66
 67	sshAuth := shared.NewSshAuthHandler(dbpool, logger, "pico")
 68
 69	// Create a new SSH server
 70	server, err := pssh.NewSSHServerWithConfig(
 71		ctx,
 72		logger,
 73		appName,
 74		host,
 75		port,
 76		promPort,
 77		"ssh_data/term_info_ed25519",
 78		func(conn ssh.ConnMetadata, key ssh.PublicKey) (*ssh.Permissions, error) {
 79			perms, err := sshAuth.PubkeyAuthHandler(conn, key)
 80			logger.Warn("pubkey auth handler", "err", err)
 81			if perms == nil {
 82				perms = &ssh.Permissions{
 83					Extensions: map[string]string{
 84						"pubkey": utils.KeyForKeyText(key),
 85					},
 86				}
 87			}
 88
 89			return perms, nil
 90		},
 91		[]pssh.SSHServerMiddleware{
 92			pipe.Middleware(handler, ""),
 93			list.Middleware(handler),
 94			scp.Middleware(handler),
 95			rsync.Middleware(handler),
 96			auth.Middleware(handler),
 97			func(next pssh.SSHServerHandler) pssh.SSHServerHandler {
 98				return func(sesh *pssh.SSHServerConnSession) error {
 99					shrd := &tui.SharedModel{
100						Session: sesh,
101						Cfg:     cfg,
102						Dbpool:  handler.DBPool,
103						Logger:  pssh.GetLogger(sesh),
104					}
105					return pssh.PtyMdw(createTui(shrd), 200*time.Millisecond)(next)(sesh)
106				}
107			},
108			Middleware(cliHandler),
109			pssh.LogMiddleware(handler, dbpool),
110		},
111		[]pssh.SSHServerMiddleware{
112			sftp.Middleware(handler),
113			pssh.LogMiddleware(handler, dbpool),
114		},
115		nil,
116	)
117
118	if err != nil {
119		logger.Error("failed to create ssh server", "err", err.Error())
120		os.Exit(1)
121	}
122
123	done := make(chan os.Signal, 1)
124	signal.Notify(done, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)
125	logger.Info("Starting SSH server", "addr", server.Config.ListenAddr)
126	go func() {
127		if err = server.ListenAndServe(); err != nil {
128			logger.Error("serve", "err", err.Error())
129			os.Exit(1)
130		}
131	}()
132
133	exit := func() {
134		logger.Info("stopping ssh server")
135		cancel()
136	}
137
138	<-done
139	exit()
140}