Passwords, Security & Metadata

import {PdfDocument} from "@ironsoftware/ironpdf";

(async () => {
    // Import a PDF document or create a new PDF from Html
    const pdf = await PdfDocument.open("encrypted.pdf", "password");

    // Create an empty Map
    const newMetadata = new Map();

    // Add key-value pairs of metadata
    newMetadata.set("Author", "Satoshi Nakamoto");
    newMetadata.set("Keywords", "SEO, Friendly");

    await pdf.overrideMetadata(newMetadata);

    await pdf.removePasswordsAndEncryption();
    // Make PDF read-only
    await pdf.makePdfDocumentReadOnly("secret-key");

    // Configure permissions
    const permissions = {
        AllowAnnotations: false,
        AllowExtractContent: false,
        AllowFillForms: false,
        AllowPrint: true,
    };

    await pdf.setPermission(permissions);
    
    // Change or set the document encrpytion password
    await pdf.saveAs("secured.pdf", {
        ownerPassword: "top-secret",
        userPassword: "my-password",
    });
})();

Passwords, Security & Metadata

IronPDF allows the ability to encrypt, decrypt, modify metadata, and set certain permissions regarding annotations, copying and pasting content, form fields, and printing.

To open a password-protected PDF document, use the open method and provide the password as the second parameter. Setting metadata requires creating a new map and inputting key-value pairs corresponding to the metadata information. Pass the new metadata map into the overrideMetadata method to override the old metadata.

using IronPdf;
using System.Collections.Generic;

class PDFExample
{
    static void Main()
    {
        // Assuming pdfPath is the path to your PDF document
        string pdfPath = "path/to/your/document.pdf";
        string password = "yourPassword";

        // Open a password-protected PDF
        PdfDocument pdf = PdfDocument.Load(pdfPath, password);

        // Create new metadata to override existing metadata
        Dictionary<string, string> newMetadata = new Dictionary<string, string>
        {
            { "Title", "New Title" },
            { "Author", "Author Name" },
            { "Subject", "Subject Content" }
        };

        // Override old metadata with new metadata
        pdf.OverrideMetadata(newMetadata);
    }
}

using IronPdf;
using System.Collections.Generic;

class PDFExample
{
    static void Main()
    {
        // Assuming pdfPath is the path to your PDF document
        string pdfPath = "path/to/your/document.pdf";
        string password = "yourPassword";

        // Open a password-protected PDF
        PdfDocument pdf = PdfDocument.Load(pdfPath, password);

        // Create new metadata to override existing metadata
        Dictionary<string, string> newMetadata = new Dictionary<string, string>
        {
            { "Title", "New Title" },
            { "Author", "Author Name" },
            { "Subject", "Subject Content" }
        };

        // Override old metadata with new metadata
        pdf.OverrideMetadata(newMetadata);
    }
}

Imports IronPdf
Imports System.Collections.Generic

Friend Class PDFExample
	Shared Sub Main()
		' Assuming pdfPath is the path to your PDF document
		Dim pdfPath As String = "path/to/your/document.pdf"
		Dim password As String = "yourPassword"

		' Open a password-protected PDF
		Dim pdf As PdfDocument = PdfDocument.Load(pdfPath, password)

		' Create new metadata to override existing metadata
		Dim newMetadata As New Dictionary(Of String, String) From {
			{"Title", "New Title"},
			{"Author", "Author Name"},
			{"Subject", "Subject Content"}
		}

		' Override old metadata with new metadata
		pdf.OverrideMetadata(newMetadata)
	End Sub
End Class

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The removePasswordsAndEncryption method is used to remove any passwords from the document. The makePdfDocumentReadOnly method will make this PDF document read-only, encrypting content at 128 bits and disallowing copy and paste of content, annotations, and form editing.

class PDFSecurity
{
    static void MakeReadOnly(string pdfPath, string outputPdfPath)
    {
        // Load the PDF document
        PdfDocument pdf = PdfDocument.Load(pdfPath);

        // Remove passwords and encryption
        pdf.RemovePasswordsAndEncryption();

        // Make the PDF document read-only
        pdf.MakePdfDocumentReadOnly();

        // Save the changes to a new PDF
        pdf.SaveAs(outputPdfPath);
    }
}

class PDFSecurity
{
    static void MakeReadOnly(string pdfPath, string outputPdfPath)
    {
        // Load the PDF document
        PdfDocument pdf = PdfDocument.Load(pdfPath);

        // Remove passwords and encryption
        pdf.RemovePasswordsAndEncryption();

        // Make the PDF document read-only
        pdf.MakePdfDocumentReadOnly();

        // Save the changes to a new PDF
        pdf.SaveAs(outputPdfPath);
    }
}

Friend Class PDFSecurity
	Private Shared Sub MakeReadOnly(ByVal pdfPath As String, ByVal outputPdfPath As String)
		' Load the PDF document
		Dim pdf As PdfDocument = PdfDocument.Load(pdfPath)

		' Remove passwords and encryption
		pdf.RemovePasswordsAndEncryption()

		' Make the PDF document read-only
		pdf.MakePdfDocumentReadOnly()

		' Save the changes to a new PDF
		pdf.SaveAs(outputPdfPath)
	End Sub
End Class

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Configure permissions by creating a permission object with permission settings and pass it to the setPermission method.

class PDFPermissions
{
    static void SetPermissions(string pdfPath, string outputPdfPath)
    {
        // Load PDF
        PdfDocument pdf = PdfDocument.Load(pdfPath);

        // Configure permissions
        PdfPermissions permissions = new PdfPermissions
        {
            AllowCopyContent = false,
            AllowEditAnnotations = false,
            AllowEditContent = false,
            AllowPrint = false
        };

        // Set the permission settings for the PDF
        pdf.SetPermissions(permissions);

        // Save the permission-changed document
        pdf.SaveAs(outputPdfPath);
    }
}

class PDFPermissions
{
    static void SetPermissions(string pdfPath, string outputPdfPath)
    {
        // Load PDF
        PdfDocument pdf = PdfDocument.Load(pdfPath);

        // Configure permissions
        PdfPermissions permissions = new PdfPermissions
        {
            AllowCopyContent = false,
            AllowEditAnnotations = false,
            AllowEditContent = false,
            AllowPrint = false
        };

        // Set the permission settings for the PDF
        pdf.SetPermissions(permissions);

        // Save the permission-changed document
        pdf.SaveAs(outputPdfPath);
    }
}

Friend Class PDFPermissions
	Private Shared Sub SetPermissions(ByVal pdfPath As String, ByVal outputPdfPath As String)
		' Load PDF
		Dim pdf As PdfDocument = PdfDocument.Load(pdfPath)

		' Configure permissions
		Dim permissions As New PdfPermissions With {
			.AllowCopyContent = False,
			.AllowEditAnnotations = False,
			.AllowEditContent = False,
			.AllowPrint = False
		}

		' Set the permission settings for the PDF
		pdf.SetPermissions(permissions)

		' Save the permission-changed document
		pdf.SaveAs(outputPdfPath)
	End Sub
End Class

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Lastly, the saveAs method can facilitate an object with ownerPassword and userPassword properties to be set respectively.

class PDFSaveWithPassword
{
    static void SaveWithPassword(string pdfPath, string outputPdfPath, string ownerPassword, string userPassword)
    {
        // Load PDF
        PdfDocument pdf = PdfDocument.Load(pdfPath);

        // Save the PDF with owner and user passwords specified
        pdf.SaveAs(outputPdfPath, ownerPassword, userPassword);
    }
}

class PDFSaveWithPassword
{
    static void SaveWithPassword(string pdfPath, string outputPdfPath, string ownerPassword, string userPassword)
    {
        // Load PDF
        PdfDocument pdf = PdfDocument.Load(pdfPath);

        // Save the PDF with owner and user passwords specified
        pdf.SaveAs(outputPdfPath, ownerPassword, userPassword);
    }
}

Friend Class PDFSaveWithPassword
	Private Shared Sub SaveWithPassword(ByVal pdfPath As String, ByVal outputPdfPath As String, ByVal ownerPassword As String, ByVal userPassword As String)
		' Load PDF
		Dim pdf As PdfDocument = PdfDocument.Load(pdfPath)

		' Save the PDF with owner and user passwords specified
		pdf.SaveAs(outputPdfPath, ownerPassword, userPassword)
	End Sub
End Class

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For more detailed information about the capabilities and uses of IronPDF, visit the IronPDF product page or explore more about Iron Software's other products on their website.