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	pgsdb "github.com/picosh/pico/pkg/apps/pgs/db"
 12	"github.com/picosh/pico/pkg/db/postgres"
 13	"github.com/picosh/pico/pkg/pssh"
 14	"github.com/picosh/pico/pkg/send/auth"
 15	"github.com/picosh/pico/pkg/send/list"
 16	"github.com/picosh/pico/pkg/send/pipe"
 17	"github.com/picosh/pico/pkg/send/protocols/rsync"
 18	"github.com/picosh/pico/pkg/send/protocols/scp"
 19	"github.com/picosh/pico/pkg/send/protocols/sftp"
 20	"github.com/picosh/pico/pkg/shared"
 21	"github.com/picosh/pico/pkg/tui"
 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 := shared.GetEnv("PICO_HOST", "0.0.0.0")
 44	port := shared.GetEnv("PICO_SSH_PORT", "2222")
 45	promPort := shared.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	pgsDB := pgsdb.NewDBWithConn(dbpool.Db, cfg.Logger)
 58
 59	handler := NewUploadHandler(
 60		dbpool,
 61		cfg,
 62	)
 63
 64	cliHandler := &CliHandler{
 65		Logger: logger,
 66		DBPool: dbpool,
 67	}
 68
 69	sshAuth := shared.NewSshAuthHandler(dbpool, logger, "pico")
 70
 71	// Create a new SSH server
 72	server, err := pssh.NewSSHServerWithConfig(
 73		ctx,
 74		logger,
 75		appName,
 76		host,
 77		port,
 78		promPort,
 79		"ssh_data/term_info_ed25519",
 80		func(conn ssh.ConnMetadata, key ssh.PublicKey) (*ssh.Permissions, error) {
 81			perms, err := sshAuth.PubkeyAuthHandler(conn, key)
 82			logger.Warn("pubkey auth handler", "err", err)
 83			if perms == nil {
 84				perms = &ssh.Permissions{
 85					Extensions: map[string]string{
 86						"pubkey": shared.KeyForKeyText(key),
 87					},
 88				}
 89			}
 90
 91			return perms, nil
 92		},
 93		[]pssh.SSHServerMiddleware{
 94			pipe.Middleware(handler, ""),
 95			list.Middleware(handler),
 96			scp.Middleware(handler),
 97			rsync.Middleware(handler),
 98			auth.Middleware(handler),
 99			func(next pssh.SSHServerHandler) pssh.SSHServerHandler {
100				return func(sesh *pssh.SSHServerConnSession) error {
101					shrd := &tui.SharedModel{
102						Session: sesh,
103						Cfg:     cfg,
104						Dbpool:  handler.DBPool,
105						PgsDB:   pgsDB,
106						Logger:  pssh.GetLogger(sesh),
107					}
108					return pssh.PtyMdw(createTui(shrd), 200*time.Millisecond)(next)(sesh)
109				}
110			},
111			Middleware(cliHandler),
112			pssh.LogMiddleware(handler, dbpool),
113		},
114		[]pssh.SSHServerMiddleware{
115			sftp.Middleware(handler),
116			pssh.LogMiddleware(handler, dbpool),
117		},
118		nil,
119	)
120
121	if err != nil {
122		logger.Error("failed to create ssh server", "err", err.Error())
123		os.Exit(1)
124	}
125
126	done := make(chan os.Signal, 1)
127	signal.Notify(done, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)
128	logger.Info("Starting SSH server", "addr", server.Config.ListenAddr)
129	go func() {
130		if err = server.ListenAndServe(); err != nil {
131			logger.Error("serve", "err", err.Error())
132			os.Exit(1)
133		}
134	}()
135
136	exit := func() {
137		logger.Info("stopping ssh server")
138		cancel()
139	}
140
141	<-done
142	exit()
143}