OptionalkeyThe symmetric key to use to decrypt the envelope's subject (ur:crypto-key)
OptionalpasswordThe password to derive the symmetric key
Use SSH_ASKPASS to read the password
OptionalrecipientThe recipient's private key (ur:crypto-prvkey-base or ur:crypto-prvkeys)
OptionalsshThe SSH identity to use to decrypt the envelope's subject
OptionalenvelopeThe envelope to decrypt
Command arguments for the decrypt command.