/// <summary>
/// Generates a PDF document that is encrypted using AES method.
/// </summary>
/// <param name="keySize">The encryption key size.</param>
/// <param name="aes"></param>
/// <returns></returns>
private static PdfFixedDocument EncryptAES(int keySize, PdfAesSecurityHandler aes)
{
PdfFixedDocument doc = new PdfFixedDocument();
aes.EnableContentExtractionForAccessibility = false;
aes.EnableDocumentAssembly = false;
aes.EnableDocumentChange = false;
aes.EnableContentExtraction = false;
aes.EnableFormsFill = false;
aes.EnableAnnotationsAndFieldsEdit = false;
aes.EnablePrint = false;
aes.EncryptMetadata = true;
aes.KeySize = keySize;
aes.UserPassword = "******";
aes.OwnerPassword = "******";
PdfPage page = doc.Pages.Add();
PdfStandardFont helvetica = new PdfStandardFont(PdfStandardFontFace.HelveticaBoldItalic, 16);
PdfBrush blackBrush = new PdfBrush();
string text = string.Format("Encryption: AES {0} bit", keySize);
if ((aes.KeySize == 256) && aes.UseEnhancedPasswordValidation)
{
text = text + " with enhanced password validation (Acrobat X or later)";
}
page.Graphics.DrawString(text, helvetica, blackBrush, 50, 100);
return doc;
}
/// <summary>
/// Generates a PDF document that is encrypted using AES method.
/// </summary>
/// <param name="keySize">The encryption key size.</param>
/// <param name="aes"></param>
/// <returns></returns>
private static PdfFixedDocument EncryptAES(int keySize, PdfAesSecurityHandler aes)
{
PdfFixedDocument doc = new PdfFixedDocument();
aes.EnableContentExtractionForAccessibility = false;
aes.EnableDocumentAssembly = false;
aes.EnableDocumentChange = false;
aes.EnableContentExtraction = false;
aes.EnableFormsFill = false;
aes.EnableAnnotationsAndFieldsEdit = false;
aes.EnablePrint = false;
aes.EncryptMetadata = true;
aes.KeySize = keySize;
aes.UserPassword = "******";
aes.OwnerPassword = "******";
PdfPage page = doc.Pages.Add();
PdfStandardFont helvetica = new PdfStandardFont(PdfStandardFontFace.HelveticaBoldItalic, 16);
PdfBrush blackBrush = new PdfBrush();
string text = string.Format("Encryption: AES {0} bit", keySize);
if ((aes.KeySize == 256) && aes.UseEnhancedPasswordValidation)
{
text = text + " with enhanced password validation (Acrobat X or later)";
}
page.Graphics.DrawString(text, helvetica, blackBrush, 50, 100);
return(doc);
}
/// <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, "xfinium.pdf.sample.encryption.rc4.40bit.pdf", rc4_40),
new SampleOutputInfo(document2, "xfinium.pdf.sample.encryption.rc4.128bit.pdf", rc4_128),
new SampleOutputInfo(document3, "xfinium.pdf.sample.encryption.aes.128bit.pdf", aes128),
new SampleOutputInfo(document4, "xfinium.pdf.sample.encryption.aes.256bit.pdf", aes256),
new SampleOutputInfo(document5, "xfinium.pdf.sample.encryption.aes.256bit.enhanced.pdf", aes256e),
new SampleOutputInfo(document6, "xfinium.pdf.sample.encryption.decrypted.pdf"),
};
return output;
}
/// <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, "xfinium.pdf.sample.encryption.rc4.40bit.pdf", rc4_40),
new SampleOutputInfo(document2, "xfinium.pdf.sample.encryption.rc4.128bit.pdf", rc4_128),
new SampleOutputInfo(document3, "xfinium.pdf.sample.encryption.aes.128bit.pdf", aes128),
new SampleOutputInfo(document4, "xfinium.pdf.sample.encryption.aes.256bit.pdf", aes256),
new SampleOutputInfo(document5, "xfinium.pdf.sample.encryption.aes.256bit.enhanced.pdf", aes256e),
new SampleOutputInfo(document6, "xfinium.pdf.sample.encryption.decrypted.pdf"),
};
return(output);
}