LoadPubkeysFromExchange loads a public key from key exchange.

LoadSecretKeyFromReader reads secret key from an io.Reader, and saves it into its place.

SavePubkeyExchange saves public OpenPGP key into key exchange.

SaveSecretExchange saves secret key into key exchange, encrypted with OpenPGP key.

SecretKeyFromExchange loads data from an encrypted secret key into provided object, and then saves it.

UpdateSecretExchangeKeys updates all key exchange secret keys with new data.