public string DecodeAndSaveFile(string retornoFilePath) { var key = this.GetCryptKey(); var fileName = Path.GetFileName(retornoFilePath); try { var wis = new br.com.bradesco.webta.security.crypto.WEBTAInputStream( fileName, Path.GetDirectoryName(retornoFilePath), key); int readBytes = 0; byte[] aux = new byte[512]; var baos = new java.io.ByteArrayOutputStream(); while ((readBytes = wis.read(aux, 0, aux.Length)) > 0) { baos.write(aux, 0, readBytes); } var outputFile = string.Concat(Path.Combine(Path.GetDirectoryName(retornoFilePath), Path.GetFileNameWithoutExtension(fileName)), ".out.RET"); File.WriteAllText(outputFile, baos.toString()); wis.close(); return(outputFile); } catch (Exception ex) { throw new Exception(string.Format("Falha ao descriptografar o arquivo '{0}'.", fileName), ex); } }