Package clearsign generates and processes OpenPGP, clear-signed data. See RFC 4880, section 7.
Clearsigned messages are cryptographically signed, but the contents of the message are kept in plaintext so that it can be read without special tools.
func Encode(w io.Writer, privateKey *packet.PrivateKey, config *packet.Config) (plaintext io.WriteCloser, err error)
Encode returns a WriteCloser which will clear-sign a message with privateKey and write it to w. If config is nil, sensible defaults are used.
A Block represents a clearsigned message. A signature on a Block can be checked by passing Bytes into openpgp.CheckDetachedSignature.
Decode finds the first clearsigned message in data and returns it, as well as the suffix of data which remains after the message.