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package packet
import (
"io"
"github.com/ProtonMail/go-crypto/openpgp/errors"
)
type Marker struct{}
const markerString = "PGP"
// parse just checks if the packet contains "PGP".
func (m *Marker) parse(reader io.Reader) error {
var buffer [3]byte
if _, err := io.ReadFull(reader, buffer[:]); err != nil {
return err
}
if string(buffer[:]) != markerString {
return errors.StructuralError("invalid marker packet")
}
return nil
}
// SerializeMarker writes a marker packet to writer.
func SerializeMarker(writer io.Writer) error {
err := serializeHeader(writer, packetTypeMarker, len(markerString))
if err != nil {
return err
}
_, err = writer.Write([]byte(markerString))
return err
}
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