Class PdfSignatureExtensions

A class that represents a PDF signing certificate (.PFX or .p12) format which can be used to digitally sign a PDF. This protecting it from alteration.

Inheritance

System.Object

PdfSignatureExtensions

Namespace: IronPdf.Signing

Assembly: IronPdf.dll

Syntax

public static class PdfSignatureExtensions : Object

Methods

SignPdfFile(PdfSignature, String, Boolean, String, String)

Signs an existing PDF file.

Declaration

public static bool SignPdfFile(this PdfSignature signature, string pdfFilePath, bool removeOldSignatures = false, string userPassword = null, string ownerPassword = null)

Parameters

Type	Name	Description
PdfSignature	signature
System.String	pdfFilePath	The PDF file path.
System.Boolean	removeOldSignatures	if set to `true` old digital signatures are removed to ensure signing validity.
System.String	userPassword	Optional user password if the PDF document is encrypted.
System.String	ownerPassword	Optional owner password if the PDF document is encrypted.

Returns

Type	Description
System.Boolean	`true` if successful.