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key_sign.go
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key_sign.go
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package cmds
import (
"encoding/base64"
"os"
"strings"
"github.com/pkg/errors"
"github.com/spikeekips/mitum/base/key"
"github.com/spikeekips/mitum/util"
)
type SignKeyCommand struct {
*BaseCommand
Key StringLoad `arg:"" name:"privatekey" help:"privatekey" required:"true"`
Base string `arg:"" name:"signature base" help:"signature base for signing" required:"true"`
Quite bool `name:"quite" short:"q" help:"keep silence"`
}
func NewSignKeyCommand() SignKeyCommand {
return SignKeyCommand{
BaseCommand: NewBaseCommand("key-sign"),
}
}
func (cmd *SignKeyCommand) Run(version util.Version) error {
if err := cmd.Initialize(cmd, version); err != nil {
return errors.Wrap(err, "failed to initialize command")
}
var priv key.Privatekey
if k, err := loadKey(cmd.Key.Bytes()); err != nil {
if cmd.Quite {
os.Exit(1) // revive:disable-line:deep-exit
}
return err
} else if pk, ok := k.(key.Privatekey); !ok {
return errors.Errorf("not Privatekey, %T", k)
} else {
priv = pk
}
cmd.Log().Debug().Interface("key", priv).Msg("key parsed")
var base []byte
if s := strings.TrimSpace(cmd.Base); len(s) < 1 {
return errors.Errorf("empty signature base")
} else if b, err := base64.StdEncoding.DecodeString(s); err != nil {
return errors.Wrap(err, "invalid signature base; failed to decode by base64")
} else {
base = b
}
sig, err := priv.Sign(base)
if err != nil {
return errors.Wrap(err, "failed to sign base")
}
cmd.print(sig.String())
return nil
}
func loadKey(b []byte) (key.Key, error) {
s := strings.TrimSpace(string(b))
if pk, err := key.DecodeKeyFromString(s, jenc); err != nil {
return nil, err
} else if err := pk.IsValid(nil); err != nil {
return nil, err
} else {
return pk, nil
}
}