package commands import ( "bytes" "context" "fmt" "net" "net/http" "os" "path/filepath" "strconv" "strings" "unicode" "github.com/pkg/errors" "github.com/smallstep/certificates/acme" "github.com/smallstep/certificates/authority/config" "github.com/smallstep/certificates/authority/provisioner" "github.com/smallstep/certificates/ca" "github.com/smallstep/certificates/db" "github.com/smallstep/certificates/pki" "github.com/urfave/cli" "go.step.sm/cli-utils/errs" "go.step.sm/cli-utils/step" ) // AppCommand is the action used as the top action. var AppCommand = cli.Command{ Name: "start", Action: appAction, UsageText: `**step-ca** [**--password-file**=] [**--ssh-host-password-file**=] [**--ssh-user-password-file**=] [**--issuer-password-file**=] [**--pidfile**=] [**--resolver**=]`, Flags: []cli.Flag{ cli.StringFlag{ Name: "password-file", Usage: `path to the containing the password to decrypt the intermediate private key.`, }, cli.StringFlag{ Name: "ssh-host-password-file", Usage: `path to the containing the password to decrypt the private key used to sign SSH host certificates. If the flag is not passed it will default to --password-file.`, }, cli.StringFlag{ Name: "ssh-user-password-file", Usage: `path to the containing the password to decrypt the private key used to sign SSH user certificates. If the flag is not passed it will default to --password-file.`, }, cli.StringFlag{ Name: "issuer-password-file", Usage: `path to the containing the password to decrypt the certificate issuer private key used in the RA mode.`, }, cli.StringFlag{ Name: "resolver", Usage: "address of a DNS resolver to be used instead of the default.", }, cli.StringFlag{ Name: "token", Usage: "token used to enable the linked ca.", EnvVar: "STEP_CA_TOKEN", }, cli.BoolFlag{ Name: "quiet", Usage: "disable startup information", EnvVar: "STEP_CA_QUIET", }, cli.StringFlag{ Name: "context", Usage: "the of the authority's context.", EnvVar: "STEP_CA_CONTEXT", }, cli.IntFlag{ Name: "acme-http-port", Usage: `the used on http-01 challenges. It can be changed for testing purposes. Requires **--insecure** flag.`, }, cli.IntFlag{ Name: "acme-tls-port", Usage: `the used on tls-alpn-01 challenges. It can be changed for testing purposes. Requires **--insecure** flag.`, }, cli.StringFlag{ Name: "pidfile", Usage: "the path to the to write the process ID.", }, cli.BoolFlag{ Name: "insecure", Usage: "enable insecure flags.", }, }, } var pidfile string // AppAction is the action used when the top command runs. func appAction(ctx *cli.Context) error { passFile := ctx.String("password-file") sshHostPassFile := ctx.String("ssh-host-password-file") sshUserPassFile := ctx.String("ssh-user-password-file") issuerPassFile := ctx.String("issuer-password-file") resolver := ctx.String("resolver") token := ctx.String("token") quiet := ctx.Bool("quiet") if ctx.NArg() > 1 { return errs.TooManyArguments(ctx) } // Allow custom ACME ports with insecure if acmePort := ctx.Int("acme-http-port"); acmePort != 0 { if ctx.Bool("insecure") { acme.InsecurePortHTTP01 = acmePort } else { return fmt.Errorf("flag '--acme-http-port' requires the '--insecure' flag") } } if acmePort := ctx.Int("acme-tls-port"); acmePort != 0 { if ctx.Bool("insecure") { acme.InsecurePortTLSALPN01 = acmePort } else { return fmt.Errorf("flag '--acme-tls-port' requires the '--insecure' flag") } } // Allow custom contexts. if caCtx := ctx.String("context"); caCtx != "" { if _, ok := step.Contexts().Get(caCtx); ok { if err := step.Contexts().SetCurrent(caCtx); err != nil { return err } } else if token == "" { return fmt.Errorf("context %q not found", caCtx) } else if err := createContext(caCtx); err != nil { return err } } var configFile string if ctx.NArg() > 0 { configFile = ctx.Args().Get(0) } else { configFile = step.CaConfigFile() } cfg, err := config.LoadConfiguration(configFile) if err != nil && token == "" { var pathErr *os.PathError if errors.As(err, &pathErr) { fmt.Println("step-ca can't find or open the configuration file for your CA.") fmt.Println("You may need to create a CA first by running `step ca init`.") fmt.Println("Documentation: https://u.step.sm/docs/ca") os.Exit(1) } fatal(err) } // Initialize a basic configuration to be used with an automatically // configured linked RA. Default configuration includes: // * badgerv2 on $(step path)/db // * JSON logger // * Default TLS options if cfg == nil { cfg = &config.Config{ SkipValidation: true, Logger: []byte(`{"format":"json"}`), DB: &db.Config{ Type: "badgerv2", DataSource: filepath.Join(step.Path(), "db"), }, AuthorityConfig: &config.AuthConfig{ DeploymentType: pki.LinkedDeployment.String(), Provisioners: provisioner.List{}, Template: &config.ASN1DN{}, Backdate: &provisioner.Duration{ Duration: config.DefaultBackdate, }, }, TLS: &config.DefaultTLSOptions, } } if cfg.AuthorityConfig != nil { if token == "" && strings.EqualFold(cfg.AuthorityConfig.DeploymentType, pki.LinkedDeployment.String()) { return errors.New(`'step-ca' requires the '--token' flag for linked deploy type. To get a linked authority token: 1. Log in or create a Certificate Manager account at ` + "\033[1mhttps://u.step.sm/linked\033[0m" + ` 2. Add a new authority and select "Link a step-ca instance" 3. Follow instructions in browser to start 'step-ca' using the '--token' flag `) } } var password []byte if passFile != "" { if password, err = os.ReadFile(passFile); err != nil { fatal(errors.Wrapf(err, "error reading %s", passFile)) } password = bytes.TrimRightFunc(password, unicode.IsSpace) } var sshHostPassword []byte if sshHostPassFile != "" { if sshHostPassword, err = os.ReadFile(sshHostPassFile); err != nil { fatal(errors.Wrapf(err, "error reading %s", sshHostPassFile)) } sshHostPassword = bytes.TrimRightFunc(sshHostPassword, unicode.IsSpace) } var sshUserPassword []byte if sshUserPassFile != "" { if sshUserPassword, err = os.ReadFile(sshUserPassFile); err != nil { fatal(errors.Wrapf(err, "error reading %s", sshUserPassFile)) } sshUserPassword = bytes.TrimRightFunc(sshUserPassword, unicode.IsSpace) } var issuerPassword []byte if issuerPassFile != "" { if issuerPassword, err = os.ReadFile(issuerPassFile); err != nil { fatal(errors.Wrapf(err, "error reading %s", issuerPassFile)) } issuerPassword = bytes.TrimRightFunc(issuerPassword, unicode.IsSpace) } if filename := ctx.String("pidfile"); filename != "" { pid := []byte(strconv.Itoa(os.Getpid()) + "\n") //nolint:gosec // 0644 (-rw-r--r--) are common permissions for a pid file if err := os.WriteFile(filename, pid, 0644); err != nil { fatal(errors.Wrap(err, "error writing pidfile")) } pidfile = filename } // replace resolver if requested if resolver != "" { net.DefaultResolver.PreferGo = true net.DefaultResolver.Dial = func(ctx context.Context, network, address string) (net.Conn, error) { return net.Dial(network, resolver) } } srv, err := ca.New(cfg, ca.WithConfigFile(configFile), ca.WithPassword(password), ca.WithSSHHostPassword(sshHostPassword), ca.WithSSHUserPassword(sshUserPassword), ca.WithIssuerPassword(issuerPassword), ca.WithLinkedCAToken(token), ca.WithQuiet(quiet), ) if err != nil { fatal(err) } go ca.StopReloaderHandler(srv) if err = srv.Run(); err != nil && !errors.Is(err, http.ErrServerClosed) { fatal(err) } if pidfile != "" { os.Remove(pidfile) } return nil } // createContext creates a new context using the given name for the context, // authority and profile. func createContext(name string) error { if err := step.Contexts().Add(&step.Context{ Name: name, Authority: name, Profile: name, }); err != nil { return fmt.Errorf("error adding context: %w", err) } if err := step.Contexts().SaveCurrent(name); err != nil { return fmt.Errorf("error saving context: %w", err) } if err := step.Contexts().SetCurrent(name); err != nil { return fmt.Errorf("error setting context: %w", err) } if err := os.MkdirAll(step.Path(), 0700); err != nil { return fmt.Errorf("error creating directory: %w", err) } return nil } // fatal writes the passed error on the standard error and exits with the exit // code 1. If the environment variable STEPDEBUG is set to 1 it shows the // stack trace of the error. func fatal(err error) { if os.Getenv("STEPDEBUG") == "1" { fmt.Fprintf(os.Stderr, "%+v\n", err) } else { fmt.Fprintln(os.Stderr, err) } if pidfile != "" { os.Remove(pidfile) } os.Exit(2) }