/// <summary>
/// Main method for running the sample.
/// </summary>
public static SampleOutputInfo[] Run(Stream input)
{
PDFRc4SecurityHandler rc4_40 = new PDFRc4SecurityHandler();
PDFFixedDocument document1 = EncryptRC4(40, rc4_40);
PDFRc4SecurityHandler rc4_128 = new PDFRc4SecurityHandler();
PDFFixedDocument document2 = EncryptRC4(128, rc4_128);
PDFAesSecurityHandler aes128 = new PDFAesSecurityHandler();
PDFFixedDocument document3 = EncryptAES(128, aes128);
PDFAesSecurityHandler aes256 = new PDFAesSecurityHandler();
PDFFixedDocument document4 = EncryptAES(256, aes256);
PDFAesSecurityHandler aes256e = new PDFAesSecurityHandler();
aes256e.UseEnhancedPasswordValidation = true;
PDFFixedDocument document5 = EncryptAES(256, aes256e);
PDFFixedDocument document6 = Decrypt(input);
SampleOutputInfo[] output = new SampleOutputInfo[]
{
new SampleOutputInfo(document1, "encryption.rc4.40bit.pdf", rc4_40),
new SampleOutputInfo(document2, "encryption.rc4.128bit.pdf", rc4_128),
new SampleOutputInfo(document3, "encryption.aes.128bit.pdf", aes128),
new SampleOutputInfo(document4, "encryption.aes.256bit.pdf", aes256),
new SampleOutputInfo(document5, "encryption.aes.256bit.enhanced.pdf", aes256e),
new SampleOutputInfo(document6, "encryption.decrypted.pdf"),
};
return(output);
}
/// <summary>
/// Generates a PDF document that is encrypted using RC4 method.
/// </summary>
/// <param name="keySize">The encryption key size.</param>
/// <param name="rc4"></param>
/// <returns></returns>
private static PDFFixedDocument EncryptRC4(int keySize, PDFRc4SecurityHandler rc4)
{
PDFFixedDocument doc = new PDFFixedDocument();
rc4.EnableContentExtractionForAccessibility = false;
rc4.EnableDocumentAssembly = false;
rc4.EnableDocumentChange = false;
rc4.EnableContentExtraction = false;
rc4.EnableFormsFill = false;
rc4.EnableAnnotationsAndFieldsEdit = false;
rc4.EnablePrint = false;
rc4.EncryptMetadata = true;
rc4.KeySize = keySize;
rc4.UserPassword = "******";
rc4.OwnerPassword = "******";
PDFPage page = doc.Pages.Add();
PDFStandardFont helvetica = new PDFStandardFont(PDFStandardFontFace.HelveticaBoldItalic, 16);
PDFBrush blackBrush = new PDFBrush();
page.Canvas.DrawString(string.Format("Encryption: RC4 {0} bit", keySize), helvetica, blackBrush, 50, 100);
return(doc);
}
