/// <summary>Entry point to encrypt a PDF document.</summary>
/// <param name="reader">the read PDF</param>
/// <param name="os">the output destination</param>
/// <param name="newInfo">
/// an optional
/// <c>String</c>
/// map to add or change
/// the info dictionary. Entries with
/// <see langword="null"/>
/// values delete the key in the original info dictionary
/// </param>
public void Encrypt(PdfReader reader, Stream os, IDictionary <String, String> newInfo)
{
WriterProperties writerProperties = new WriterProperties();
writerProperties.encryptionProperties = properties;
PdfWriter writer = new PdfWriter(os, writerProperties);
StampingProperties stampingProperties = new StampingProperties();
stampingProperties.SetEventCountingMetaInfo(metaInfo);
PdfDocument document = new PdfDocument(reader, writer, stampingProperties);
document.GetDocumentInfo().SetMoreInfo(newInfo);
document.Close();
}
/// <summary>Create a PdfWriter writing to the passed filename and using the passed writer properties.</summary>
/// <param name="filename">filename of the resulting pdf.</param>
/// <param name="properties">writerproperties to use.</param>
/// <exception cref="System.IO.FileNotFoundException"/>
public PdfWriter(String filename, WriterProperties properties)
: this(FileUtil.GetBufferedOutputStream(filename), properties)
{
}
