package main import ( "context" "flag" "io/ioutil" "log" "dim13.org/signify/b64file" "dim13.org/signify/zsig" "github.com/google/subcommands" ) // Usage: signify -S [-ez] [-x sigfile] -s seckey -m message type signCmd struct { embed bool zip bool sigFile string secFile string msgFile string } func (m *signCmd) Name() string { return "sign" } func (m *signCmd) Synopsis() string { return "sign file" } func (m *signCmd) Usage() string { return "sign [-ez] [-x sigfile] -s seckey -m message\n" } func (m *signCmd) SetFlags(f *flag.FlagSet) { f.BoolVar(&m.embed, "e", false, "embed the message") f.BoolVar(&m.zip, "z", false, "sign gzip archive") // TODO f.StringVar(&m.sigFile, "x", "", "signature file") f.StringVar(&m.secFile, "s", "", "secret file (required)") f.StringVar(&m.msgFile, "m", "", "message file (required)") } func (m *signCmd) Execute(ctx context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus { if m.secFile == "" || m.msgFile == "" { f.Usage() return subcommands.ExitUsageError } if m.sigFile == "" { m.sigFile = SigName(m.msgFile) } var err error switch { case m.zip && m.embed: f.Usage() return subcommands.ExitUsageError case m.zip: err = m.zipped() case m.embed: err = m.embedded() default: err = m.plain() } if err != nil { log.Println(err) return subcommands.ExitFailure } return subcommands.ExitSuccess } func (m *signCmd) plain() error { sec, err := openSec(m.secFile) if err != nil { return err } msg, err := ioutil.ReadFile(m.msgFile) if err != nil { return err } sig := sec.Sign(msg) comment := VerifyWith(m.secFile) fd, err := Create(m.sigFile, ModeSig) if err != nil { return err } defer fd.Close() return b64file.Encode(fd, sig, comment, nil) } func (m *signCmd) embedded() error { sec, err := openSec(m.secFile) if err != nil { return err } msg, err := ioutil.ReadFile(m.msgFile) if err != nil { return err } sig := sec.Sign(msg) comment := VerifyWith(m.secFile) fd, err := Create(m.sigFile, ModeSig) if err != nil { return err } fd.Close() return b64file.Encode(fd, sig, comment, msg) } // TODO func (m *signCmd) zipped() error { fd, err := Open(m.msgFile) if err != nil { return err } defer fd.Close() z, err := zsig.NewReader(fd) if err != nil { return err } log.Println(z) zhead, err := zsig.NewHeader(z) if err != nil { return err } log.Println(zhead) body, err := zhead.MarshalText() if err != nil { return err } log.Println(body) return nil }