private string SignAndEncryptAttachment(byte[] data, string key, IList<string> recipients)
{
try
{
if (!PromptForPasswordAndKey())
return null;
var context = new CryptoContext(Passphrase);
var crypto = new PgpCrypto(context);
var headers = GetEncryptedMailHeaders();
return crypto.SignAndEncryptBinary(data, key, recipients, headers);
}
catch (Exception ex)
{
Passphrase = null;
ShowErrorBox(ex.Message);
throw;
}
}
