/// <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.Canvas.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, "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);
}
static void Main(string[] args)
{
string supportPath = "..\\..\\..\\..\\..\\SupportFiles\\";
PDFMerger merger = new PDFMerger();
merger.AppendFile(supportPath + "content.pdf");
merger.AppendFile(supportPath + "formfill.pdf");
merger.AppendFile(supportPath + "encrypted.pdf", "pdf4net");
PDFAesSecurityHandler aes256e = new PDFAesSecurityHandler();
aes256e.KeySize = 256;
aes256e.UseEnhancedPasswordValidation = true;
aes256e.UserPassword = "******";
merger.Save("mergeandencrypt.pdf", aes256e);
Console.WriteLine("Merged file saved with success to current folder.");
}
// For this sample to work, the following file
// need to exist: multicolumntextandimages.pdf.
// Compile the corresponding sample to get this file
public static void EncryptFile()
{
//PDF4NET v5:
//PDFSecurityManager securityManager = new PDFSecurityManager();
//securityManager.KeySize = EncryptionKeySize.Use128BitKey;
//securityManager.UserPassword = Encoding.ASCII.GetBytes("userpass");
//securityManager.OwnerPassword = Encoding.ASCII.GetBytes("ownerpass");
//securityManager.AllowPrint = false;
//securityManager.FullQualityPrint = true;
//securityManager.AllowModifyDocument = false;
//securityManager.AllowExtractContent = false;
//securityManager.AllowInteractiveEdit = false;
//securityManager.AllowFormsFill = true;
//securityManager.AllowAccessibilityExtractContent = true;
//securityManager.AllowAssembleDocument = false;
//PDFFile.EncryptFile(securityManager,
// "Sample_MultiColumnTextAndImages.pdf", "Sample_MultiColumnTextAndImages-Secure.pdf");
PDFFixedDocument document = new PDFFixedDocument("..\\..\\..\\..\\..\\SupportFiles\\content.pdf");
PDFAesSecurityHandler aesSecurityHandler = new PDFAesSecurityHandler();
aesSecurityHandler.KeySize = 256;
aesSecurityHandler.UserPassword = "******";
aesSecurityHandler.OwnerPassword = "******";
aesSecurityHandler.EnablePrint = false;
aesSecurityHandler.HighQualityPrint = true;
aesSecurityHandler.EnableDocumentChange = false;
aesSecurityHandler.EnableContentExtraction = false;
aesSecurityHandler.EnableAnnotationsAndFieldsEdit = false;
aesSecurityHandler.EnableFormsFill = true;
aesSecurityHandler.EnableContentExtractionForAccessibility = true;
aesSecurityHandler.EnableDocumentAssembly = false;
document.Save("content-secure.pdf", aesSecurityHandler);
// or
//PDFDocument doc =
// PDFFile.EncryptFile( securityManager, "multicolumntextandimages-secure.pdf" );
////Serial number goes here
//doc.SerialNumber = "serial number goes here";
//doc.Save( stream );
}
static void Main(string[] args)
{
// Create the pdf document
//PDF4NET v5: PDFDocument pdfDoc = new PDFDocument();
PDFFixedDocument pdfDoc = new PDFFixedDocument();
// set the security options
//PDF4NET v5: pdfDoc.SecurityManager = new PDFSecurityManager();
PDFAesSecurityHandler aesSecurityHandler = new PDFAesSecurityHandler();
// use 128 bit encryption
//PDF4NET v5: pdfDoc.SecurityManager.KeySize = EncryptionKeySize.Use128BitKey;
aesSecurityHandler.KeySize = 256;
// set user password to "userpass"
//PDF4NET v5: pdfDoc.SecurityManager.UserPassword = Encoding.ASCII.GetBytes("userpass");
aesSecurityHandler.UserPassword = "******";
// set owner password to "ownerpass"
//PDF4NET v5: pdfDoc.SecurityManager.OwnerPassword = Encoding.ASCII.GetBytes("ownerpass");
aesSecurityHandler.OwnerPassword = "******";
// allow to print the pdf document
//PDF4NET v5: pdfDoc.SecurityManager.AllowPrint = true;
aesSecurityHandler.EnablePrint = true;
// do not allow high quality print
//PDF4NET v5: pdfDoc.SecurityManager.FullQualityPrint = false;
aesSecurityHandler.HighQualityPrint = false;
// do not alow to modify the document
//PDF4NET v5: pdfDoc.SecurityManager.AllowModifyDocument = false;
aesSecurityHandler.EnableDocumentChange = false;
// do not allow to extract content (text and images) from the document
//PDF4NET v5: pdfDoc.SecurityManager.AllowExtractContent = false;
aesSecurityHandler.EnableContentExtraction = false;
// do not allow to fill forms or to create annotations
//PDF4NET v5: pdfDoc.SecurityManager.AllowInteractiveEdit = false;
aesSecurityHandler.EnableAnnotationsAndFieldsEdit = false;
// do not allow forms fill
//PDF4NET v5: pdfDoc.SecurityManager.AllowFormsFill = false;
aesSecurityHandler.EnableFormsFill = false;
// allow to extract content in support for accessibility
//PDF4NET v5: pdfDoc.SecurityManager.AllowAccessibilityExtractContent = true;
aesSecurityHandler.EnableContentExtractionForAccessibility = true;
// do not allow to assemble document
//PDF4NET v5: pdfDoc.SecurityManager.AllowAssembleDocument = false;
aesSecurityHandler.EnableDocumentAssembly = false;
// Create one page
//PDF4NET v5: PDFPage pdfPage = pdfDoc.AddPage();
PDFPage pdfPage = pdfDoc.Pages.Add();
// Draw "Encrypted Hello world" in the center of the page
//PDF4NET v5:
//pdfPage.Canvas.DrawText("Encrypted",
// new PDFFont(PDFFontFace.Helvetica, 100), new PDFPen(new PDFRgbColor(255, 0, 0), 1),
// new PDFBrush(new PDFRgbColor(0, 0, 255)), pdfPage.Width / 2, pdfPage.Height / 2 - 3,
// 0, PDFTextAlign.BottomCenter);
PDFStringLayoutOptions slo = new PDFStringLayoutOptions();
slo.X = pdfPage.Width / 2;
slo.Y = pdfPage.Height / 2 - 3;
slo.HorizontalAlign = PDFStringHorizontalAlign.Center;
slo.VerticalAlign = PDFStringVerticalAlign.Bottom;
PDFStringAppearanceOptions sao = new PDFStringAppearanceOptions();
sao.Font = new PDFStandardFont(PDFStandardFontFace.Helvetica, 100);
sao.Pen = new PDFPen(new PDFRgbColor(255, 0, 0), 1);
sao.Brush = new PDFBrush(new PDFRgbColor(0, 0, 255));
pdfPage.Canvas.DrawString("Encrypted", sao, slo);
slo.Y = pdfPage.Height / 2 + 3;
slo.VerticalAlign = PDFStringVerticalAlign.Top;
pdfPage.Canvas.DrawString("Hello world !", sao, slo);
// Save the document to disk
//PDF4NET v5:pdfDoc.Save("Sample_Encryption.pdf");
pdfDoc.Save("Sample_Encryption.pdf", aesSecurityHandler);
}
