Digital Signatures

// PM> Install-Package IronPdf
using IronPdf;


//Cryptographically sign an existing PDF in 1 line of code!
new IronPdf.Signing.PdfSignature("Iron.p12", "123456").SignPdfFile("any.pdf");
 



/***** Advanced example for more control *****/
 
// Step 1. Create a PDF
IronPdf.ChromePdfRenderer Renderer = new IronPdf.ChromePdfRenderer();
PdfDocument doc = Renderer.RenderHtmlAsPdf("<h1>Testing 2048 bit digital security</h1>");

// Step 2. Create a Signature.
// You may create a .pfx or .p12 PDF signing certificate using Adobe Acrobat Reader. 
// Read: https://helpx.adobe.com/acrobat/using/digital-ids.html

var signature = new IronPdf.Signing.PdfSignature("Iron.pfx", "123456");

// Step 3. Optional signing options and a handwritten signature graphic
signature.SigningContact = "support@ironsoftware.com";
signature.SigningLocation = "Chicago, USA";
signature.SigningReason = "To show how to sign a PDF";
signature.LoadSignatureImageFromFile("handwriting.png");

//Step 4. Sign the PDF with the PdfSignature. Multiple signing certificates may be used
doc.SignPdfWithDigitalSignature(signature);

//Step 4. The PDF is not signed until saved to file, steam or byte array.
doc.SaveAs("signed.pdf");

' PM> Install-Package IronPdf
Imports IronPdf


'Cryptographically sign an existing PDF in 1 line of code!
Call (New IronPdf.Signing.PdfSignature("Iron.p12", "123456")).SignPdfFile("any.pdf")




'''*** Advanced example for more control ****

' Step 1. Create a PDF
Dim Renderer As New IronPdf.ChromePdfRenderer()
Dim doc As PdfDocument = Renderer.RenderHtmlAsPdf("<h1>Testing 2048 bit digital security</h1>")

' Step 2. Create a Signature.
' You may create a .pfx or .p12 PDF signing certificate using Adobe Acrobat Reader. 
' Read: https://helpx.adobe.com/acrobat/using/digital-ids.html

Dim signature = New IronPdf.Signing.PdfSignature("Iron.pfx", "123456")

' Step 3. Optional signing options and a handwritten signature graphic
signature.SigningContact = "support@ironsoftware.com"
signature.SigningLocation = "Chicago, USA"
signature.SigningReason = "To show how to sign a PDF"
signature.LoadSignatureImageFromFile("handwriting.png")

'Step 4. Sign the PDF with the PdfSignature. Multiple signing certificates may be used
doc.SignPdfWithDigitalSignature(signature)

'Step 4. The PDF is not signed until saved to file, steam or byte array.
doc.SaveAs("signed.pdf")