533 lines
23 KiB
C#
533 lines
23 KiB
C#
/*
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* SecureBlackbox 2024 .NET Edition - Sample Project
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*
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* This sample project demonstrates the usage of SecureBlackbox in a
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* simple, straightforward way. It is not intended to be a complete
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* application. Error handling and other checks are simplified for clarity.
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*
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* www.nsoftware.com/secureblackbox
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*
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* This code is subject to the terms and conditions specified in the
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* corresponding product license agreement which outlines the authorized
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* usage and restrictions.
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*
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*/
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using System;
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using System.Windows.Forms;
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using nsoftware.SecureBlackbox;
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namespace PDFEncryptorDemo
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{
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public class MainForm : System.Windows.Forms.Form
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{
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private System.Windows.Forms.Button btnBrowseSource;
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private System.Windows.Forms.Button btnBrowseDest;
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private System.Windows.Forms.Label lSource;
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private System.Windows.Forms.Label lDest;
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private System.Windows.Forms.TextBox tbSource;
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private System.Windows.Forms.TextBox tbDest;
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private System.Windows.Forms.GroupBox gbEncProps;
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private System.Windows.Forms.Label lEncryptionAlgorithm;
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private System.Windows.Forms.ComboBox cbEncryptionAlgorithm;
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private System.Windows.Forms.CheckBox cbEncryptMetadata;
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private System.Windows.Forms.RadioButton rbPasswordEncryption;
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private System.Windows.Forms.RadioButton rbPublicKeyEncryption;
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private System.Windows.Forms.TextBox tbPassword;
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private System.Windows.Forms.Label lCertificate;
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private System.Windows.Forms.Button btnBrowseCert;
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private System.Windows.Forms.TextBox tbCert;
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private System.Windows.Forms.Label lCertPassword;
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private System.Windows.Forms.TextBox tbCertPassword;
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private System.Windows.Forms.Button btnEncrypt;
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private System.Windows.Forms.Button btnCancel;
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private System.Windows.Forms.OpenFileDialog openPDFDialog;
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private System.Windows.Forms.SaveFileDialog savePDFDialog;
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private System.Windows.Forms.OpenFileDialog openCertDialog;
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private System.Windows.Forms.Label lInfo;
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private System.Windows.Forms.Label lPassword;
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/// <summary>
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/// Required designer variable.
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/// </summary>
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private System.ComponentModel.Container components = null;
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public MainForm()
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{
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//
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// Required for Windows Form Designer support
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//
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InitializeComponent();
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//
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// TODO: Add any constructor code after InitializeComponent call
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//
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}
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/// <summary>
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/// Clean up any resources being used.
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/// </summary>
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protected override void Dispose(bool disposing)
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{
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if (disposing)
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{
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if (components != null)
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{
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components.Dispose();
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}
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}
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base.Dispose(disposing);
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}
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#region Windows Form Designer generated code
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/// <summary>
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/// Required method for Designer support - do not modify
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/// the contents of this method with the code editor.
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/// </summary>
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private void InitializeComponent()
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{
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this.tbSource = new System.Windows.Forms.TextBox();
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this.tbDest = new System.Windows.Forms.TextBox();
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this.btnBrowseSource = new System.Windows.Forms.Button();
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this.btnBrowseDest = new System.Windows.Forms.Button();
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this.lSource = new System.Windows.Forms.Label();
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this.lDest = new System.Windows.Forms.Label();
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this.gbEncProps = new System.Windows.Forms.GroupBox();
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this.lPassword = new System.Windows.Forms.Label();
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this.tbCertPassword = new System.Windows.Forms.TextBox();
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this.btnBrowseCert = new System.Windows.Forms.Button();
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this.lCertPassword = new System.Windows.Forms.Label();
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this.lCertificate = new System.Windows.Forms.Label();
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this.tbCert = new System.Windows.Forms.TextBox();
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this.tbPassword = new System.Windows.Forms.TextBox();
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this.rbPublicKeyEncryption = new System.Windows.Forms.RadioButton();
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this.rbPasswordEncryption = new System.Windows.Forms.RadioButton();
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this.cbEncryptMetadata = new System.Windows.Forms.CheckBox();
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this.cbEncryptionAlgorithm = new System.Windows.Forms.ComboBox();
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this.lEncryptionAlgorithm = new System.Windows.Forms.Label();
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this.btnEncrypt = new System.Windows.Forms.Button();
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this.btnCancel = new System.Windows.Forms.Button();
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this.openPDFDialog = new System.Windows.Forms.OpenFileDialog();
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this.savePDFDialog = new System.Windows.Forms.SaveFileDialog();
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this.openCertDialog = new System.Windows.Forms.OpenFileDialog();
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this.lInfo = new System.Windows.Forms.Label();
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this.gbEncProps.SuspendLayout();
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this.SuspendLayout();
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//
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// tbSource
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//
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this.tbSource.Location = new System.Drawing.Point(8, 75);
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this.tbSource.Name = "tbSource";
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this.tbSource.Size = new System.Drawing.Size(288, 21);
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this.tbSource.TabIndex = 1;
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//
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// tbDest
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//
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this.tbDest.Location = new System.Drawing.Point(8, 123);
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this.tbDest.Name = "tbDest";
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this.tbDest.Size = new System.Drawing.Size(288, 21);
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this.tbDest.TabIndex = 4;
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//
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// btnBrowseSource
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//
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this.btnBrowseSource.Location = new System.Drawing.Point(304, 72);
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this.btnBrowseSource.Name = "btnBrowseSource";
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this.btnBrowseSource.Size = new System.Drawing.Size(75, 25);
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this.btnBrowseSource.TabIndex = 2;
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this.btnBrowseSource.Text = "Browse...";
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this.btnBrowseSource.Click += new System.EventHandler(this.btnBrowseSource_Click);
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//
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// btnBrowseDest
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//
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this.btnBrowseDest.Location = new System.Drawing.Point(304, 120);
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this.btnBrowseDest.Name = "btnBrowseDest";
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this.btnBrowseDest.Size = new System.Drawing.Size(75, 25);
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this.btnBrowseDest.TabIndex = 5;
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this.btnBrowseDest.Text = "Browse...";
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this.btnBrowseDest.Click += new System.EventHandler(this.btnBrowseDest_Click);
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//
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// lSource
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//
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this.lSource.AutoSize = true;
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this.lSource.Location = new System.Drawing.Point(8, 57);
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this.lSource.Name = "lSource";
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this.lSource.Size = new System.Drawing.Size(83, 13);
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this.lSource.TabIndex = 0;
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this.lSource.Text = "Source PDF file:";
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//
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// lDest
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//
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this.lDest.AutoSize = true;
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this.lDest.Location = new System.Drawing.Point(8, 105);
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this.lDest.Name = "lDest";
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this.lDest.Size = new System.Drawing.Size(104, 13);
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this.lDest.TabIndex = 3;
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this.lDest.Text = "Destination PDF file:";
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//
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// gbEncProps
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//
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this.gbEncProps.Controls.Add(this.lPassword);
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this.gbEncProps.Controls.Add(this.tbCertPassword);
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this.gbEncProps.Controls.Add(this.btnBrowseCert);
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this.gbEncProps.Controls.Add(this.lCertPassword);
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this.gbEncProps.Controls.Add(this.lCertificate);
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this.gbEncProps.Controls.Add(this.tbCert);
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this.gbEncProps.Controls.Add(this.tbPassword);
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this.gbEncProps.Controls.Add(this.rbPublicKeyEncryption);
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this.gbEncProps.Controls.Add(this.rbPasswordEncryption);
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this.gbEncProps.Controls.Add(this.cbEncryptMetadata);
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this.gbEncProps.Controls.Add(this.cbEncryptionAlgorithm);
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this.gbEncProps.Controls.Add(this.lEncryptionAlgorithm);
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this.gbEncProps.Location = new System.Drawing.Point(8, 153);
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this.gbEncProps.Name = "gbEncProps";
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this.gbEncProps.Size = new System.Drawing.Size(368, 273);
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this.gbEncProps.TabIndex = 6;
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this.gbEncProps.TabStop = false;
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this.gbEncProps.Text = "Encryption properties";
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//
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// lPassword
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//
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this.lPassword.AutoSize = true;
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this.lPassword.Enabled = false;
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this.lPassword.Location = new System.Drawing.Point(40, 99);
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this.lPassword.Name = "lPassword";
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this.lPassword.Size = new System.Drawing.Size(57, 13);
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this.lPassword.TabIndex = 4;
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this.lPassword.Text = "Password:";
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//
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// tbCertPassword
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//
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this.tbCertPassword.Enabled = false;
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this.tbCertPassword.Location = new System.Drawing.Point(40, 243);
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this.tbCertPassword.Name = "tbCertPassword";
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this.tbCertPassword.PasswordChar = '*';
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this.tbCertPassword.Size = new System.Drawing.Size(128, 21);
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this.tbCertPassword.TabIndex = 11;
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//
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// btnBrowseCert
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//
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this.btnBrowseCert.Enabled = false;
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this.btnBrowseCert.Location = new System.Drawing.Point(278, 194);
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this.btnBrowseCert.Name = "btnBrowseCert";
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this.btnBrowseCert.Size = new System.Drawing.Size(75, 25);
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this.btnBrowseCert.TabIndex = 9;
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this.btnBrowseCert.Text = "Browse...";
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this.btnBrowseCert.Click += new System.EventHandler(this.btnBrowseCert_Click);
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//
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// lCertPassword
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//
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this.lCertPassword.AutoSize = true;
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this.lCertPassword.Enabled = false;
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this.lCertPassword.Location = new System.Drawing.Point(40, 227);
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this.lCertPassword.Name = "lCertPassword";
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this.lCertPassword.Size = new System.Drawing.Size(110, 13);
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this.lCertPassword.TabIndex = 10;
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this.lCertPassword.Text = "Certificate password:";
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//
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// lCertificate
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//
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this.lCertificate.AutoSize = true;
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this.lCertificate.Enabled = false;
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this.lCertificate.Location = new System.Drawing.Point(40, 179);
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this.lCertificate.Name = "lCertificate";
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this.lCertificate.Size = new System.Drawing.Size(113, 13);
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this.lCertificate.TabIndex = 7;
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this.lCertificate.Text = "Encryption certificate:";
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//
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// tbCert
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//
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this.tbCert.Enabled = false;
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this.tbCert.Location = new System.Drawing.Point(40, 197);
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this.tbCert.Name = "tbCert";
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this.tbCert.Size = new System.Drawing.Size(232, 21);
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this.tbCert.TabIndex = 8;
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//
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// tbPassword
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//
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this.tbPassword.Location = new System.Drawing.Point(40, 118);
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this.tbPassword.Name = "tbPassword";
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this.tbPassword.PasswordChar = '*';
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this.tbPassword.Size = new System.Drawing.Size(128, 21);
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this.tbPassword.TabIndex = 5;
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//
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// rbPublicKeyEncryption
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//
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this.rbPublicKeyEncryption.Location = new System.Drawing.Point(16, 151);
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this.rbPublicKeyEncryption.Name = "rbPublicKeyEncryption";
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this.rbPublicKeyEncryption.Size = new System.Drawing.Size(304, 24);
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this.rbPublicKeyEncryption.TabIndex = 6;
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this.rbPublicKeyEncryption.Text = "Public key encryption";
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this.rbPublicKeyEncryption.CheckedChanged += new System.EventHandler(this.rbPasswordEncryption_CheckedChanged);
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//
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// rbPasswordEncryption
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//
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this.rbPasswordEncryption.Checked = true;
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this.rbPasswordEncryption.Location = new System.Drawing.Point(16, 72);
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this.rbPasswordEncryption.Name = "rbPasswordEncryption";
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this.rbPasswordEncryption.Size = new System.Drawing.Size(272, 24);
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this.rbPasswordEncryption.TabIndex = 3;
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this.rbPasswordEncryption.TabStop = true;
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this.rbPasswordEncryption.Text = "Password encryption";
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this.rbPasswordEncryption.CheckedChanged += new System.EventHandler(this.rbPasswordEncryption_CheckedChanged);
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//
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// cbEncryptMetadata
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//
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this.cbEncryptMetadata.AutoSize = true;
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this.cbEncryptMetadata.Checked = true;
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this.cbEncryptMetadata.CheckState = System.Windows.Forms.CheckState.Checked;
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this.cbEncryptMetadata.Location = new System.Drawing.Point(184, 40);
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this.cbEncryptMetadata.Name = "cbEncryptMetadata";
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this.cbEncryptMetadata.Size = new System.Drawing.Size(162, 17);
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this.cbEncryptMetadata.TabIndex = 2;
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this.cbEncryptMetadata.Text = "Encrypt document metadata";
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//
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// cbEncryptionAlgorithm
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//
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this.cbEncryptionAlgorithm.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
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this.cbEncryptionAlgorithm.Items.AddRange(new object[] {
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"RC4/40 bits (Acrobat 4)",
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"RC4/128 bits (Acrobat 5)",
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"AES/128 bits (Acrobat 6, 7)",
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"AES/256 bits (Acrobat 9)",
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"AES/256 bits (Acrobat X)"});
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this.cbEncryptionAlgorithm.Location = new System.Drawing.Point(16, 40);
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this.cbEncryptionAlgorithm.Name = "cbEncryptionAlgorithm";
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this.cbEncryptionAlgorithm.Size = new System.Drawing.Size(152, 21);
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this.cbEncryptionAlgorithm.TabIndex = 1;
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//
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// lEncryptionAlgorithm
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//
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this.lEncryptionAlgorithm.AutoSize = true;
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this.lEncryptionAlgorithm.Location = new System.Drawing.Point(16, 24);
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this.lEncryptionAlgorithm.Name = "lEncryptionAlgorithm";
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this.lEncryptionAlgorithm.Size = new System.Drawing.Size(109, 13);
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this.lEncryptionAlgorithm.TabIndex = 0;
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this.lEncryptionAlgorithm.Text = "Encryption algorithm:";
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//
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// btnEncrypt
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//
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this.btnEncrypt.DialogResult = System.Windows.Forms.DialogResult.OK;
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this.btnEncrypt.Location = new System.Drawing.Point(125, 435);
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this.btnEncrypt.Name = "btnEncrypt";
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this.btnEncrypt.Size = new System.Drawing.Size(75, 25);
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this.btnEncrypt.TabIndex = 7;
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this.btnEncrypt.Text = "Encrypt";
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this.btnEncrypt.Click += new System.EventHandler(this.btnEncrypt_Click);
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//
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// btnCancel
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//
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this.btnCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
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this.btnCancel.Location = new System.Drawing.Point(205, 435);
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this.btnCancel.Name = "btnCancel";
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this.btnCancel.Size = new System.Drawing.Size(75, 25);
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this.btnCancel.TabIndex = 8;
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this.btnCancel.Text = "Cancel";
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this.btnCancel.Click += new System.EventHandler(this.btnCancel_Click);
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//
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// openPDFDialog
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//
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this.openPDFDialog.Filter = "PDF files (*.pdf)|*.pdf|All files (*.*)|*.*";
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this.openPDFDialog.InitialDirectory = ".";
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//
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// savePDFDialog
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//
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this.savePDFDialog.Filter = "PDF files (*.pdf)|*.pdf|All files (*.*)|*.*";
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this.savePDFDialog.InitialDirectory = ".";
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//
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// openCertDialog
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//
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this.openCertDialog.Filter = "Raw X.509 certificate (*.cer, *.csr, *.crt)|*.CER;*.CSR;*.CRT|Base64-encoded X.50" +
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"9 certificate (*.pem)|*.PEM|PKCS#12 certificate (*.pfx, *.p12)|*.PFX; *.P12|All " +
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"files (*.*)|*.*";
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this.openCertDialog.InitialDirectory = ".";
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//
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// lInfo
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//
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this.lInfo.ForeColor = System.Drawing.SystemColors.Highlight;
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this.lInfo.Location = new System.Drawing.Point(8, 8);
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this.lInfo.Name = "lInfo";
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this.lInfo.Size = new System.Drawing.Size(371, 49);
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this.lInfo.TabIndex = 9;
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this.lInfo.Text = "This sample illustrates the use of PDFEncryptor component for encrypting PDF docu" +
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"ments. Please pick the encryption type and specify either encryption password or" +
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" certificate and then click \'Encrypt\'";
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this.lInfo.UseMnemonic = false;
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//
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// MainForm
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//
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this.AcceptButton = this.btnEncrypt;
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this.AutoScaleBaseSize = new System.Drawing.Size(5, 14);
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this.CancelButton = this.btnCancel;
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this.ClientSize = new System.Drawing.Size(389, 467);
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this.Controls.Add(this.lInfo);
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this.Controls.Add(this.btnCancel);
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this.Controls.Add(this.btnEncrypt);
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this.Controls.Add(this.gbEncProps);
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this.Controls.Add(this.lDest);
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this.Controls.Add(this.lSource);
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this.Controls.Add(this.btnBrowseDest);
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this.Controls.Add(this.btnBrowseSource);
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this.Controls.Add(this.tbDest);
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this.Controls.Add(this.tbSource);
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this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
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this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
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this.MaximizeBox = false;
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this.Name = "MainForm";
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this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
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this.Text = "PDF Encryptor demo";
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this.Load += new System.EventHandler(this.MainForm_Load);
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this.gbEncProps.ResumeLayout(false);
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this.gbEncProps.PerformLayout();
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this.ResumeLayout(false);
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this.PerformLayout();
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}
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#endregion
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/// <summary>
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/// The main entry point for the application.
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/// </summary>
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[STAThread]
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static void Main()
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{
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Application.Run(new MainForm());
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}
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private void btnBrowseSource_Click(object sender, System.EventArgs e)
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{
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openPDFDialog.FileName = tbSource.Text;
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if (openPDFDialog.ShowDialog() == DialogResult.OK)
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tbSource.Text = openPDFDialog.FileName;
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}
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private void btnBrowseDest_Click(object sender, System.EventArgs e)
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{
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savePDFDialog.FileName = tbDest.Text;
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if (savePDFDialog.ShowDialog() == DialogResult.OK)
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tbDest.Text = savePDFDialog.FileName;
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}
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private void btnBrowseCert_Click(object sender, System.EventArgs e)
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{
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openCertDialog.FileName = tbCert.Text;
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if (openCertDialog.ShowDialog() == DialogResult.OK)
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tbCert.Text = openCertDialog.FileName;
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}
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private void rbPasswordEncryption_CheckedChanged(object sender, System.EventArgs e)
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{
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tbPassword.Enabled = rbPasswordEncryption.Checked;
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lPassword.Enabled = rbPasswordEncryption.Checked;
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tbCert.Enabled = !rbPasswordEncryption.Checked;
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tbCertPassword.Enabled = !rbPasswordEncryption.Checked;
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btnBrowseCert.Enabled = !rbPasswordEncryption.Checked;
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lCertificate.Enabled = !rbPasswordEncryption.Checked;
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lCertPassword.Enabled = !rbPasswordEncryption.Checked;
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if (rbPasswordEncryption.Checked)
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{
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if (cbEncryptionAlgorithm.Items.Count == 4)
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cbEncryptionAlgorithm.Items.Add("AES/256 bits (Acrobat X)");
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}
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else
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{
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if (cbEncryptionAlgorithm.Items.Count == 5)
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cbEncryptionAlgorithm.Items.RemoveAt(4);
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}
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}
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public Certificate LoadCertificate(string file, string password)
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{
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Certificate cert = null;
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if (file.Length > 0)
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{
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try
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{
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CertificateManager certmanager = new CertificateManager();
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certmanager.ImportFromFile(file, password);
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cert = certmanager.Certificate;
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}
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catch (Exception e)
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{
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MessageBox.Show("Cannot load certificate!");
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}
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|
}
|
|
|
|
return cert;
|
|
}
|
|
|
|
private void btnEncrypt_Click(object sender, System.EventArgs e)
|
|
{
|
|
using (PDFEncryptor PDFEncryptor = new PDFEncryptor())
|
|
{
|
|
try
|
|
{
|
|
PDFEncryptor.InputFile = tbSource.Text;
|
|
PDFEncryptor.OutputFile = tbDest.Text;
|
|
|
|
if (rbPasswordEncryption.Checked)
|
|
{
|
|
PDFEncryptor.UserPassword = tbPassword.Text;
|
|
PDFEncryptor.OwnerPassword = tbPassword.Text;
|
|
}
|
|
else
|
|
{
|
|
PDFEncryptor.EncryptionCertificate = LoadCertificate(tbCert.Text, tbCertPassword.Text);
|
|
}
|
|
|
|
PDFEncryptor.EncryptMetadata = cbEncryptMetadata.Checked;
|
|
|
|
if (cbEncryptionAlgorithm.SelectedIndex <= 1)
|
|
{
|
|
PDFEncryptor.EncryptionAlgorithm = "RC4";
|
|
if (cbEncryptionAlgorithm.SelectedIndex == 1)
|
|
PDFEncryptor.Config("RC4KeyBits=40");
|
|
else
|
|
PDFEncryptor.Config("RC4KeyBits=128");
|
|
}
|
|
else if (cbEncryptionAlgorithm.SelectedIndex == 2)
|
|
{
|
|
PDFEncryptor.EncryptionAlgorithm = "AES128";
|
|
}
|
|
else if (cbEncryptionAlgorithm.SelectedIndex > 3)
|
|
{
|
|
PDFEncryptor.EncryptionAlgorithm = "AES256";
|
|
if (PDFEncryptor.EncryptionCertificate == null)
|
|
{
|
|
if (cbEncryptionAlgorithm.SelectedIndex == 3)
|
|
PDFEncryptor.Config("HardenedKeyGeneration=false");
|
|
else
|
|
PDFEncryptor.Config("HardenedKeyGeneration=true");
|
|
}
|
|
}
|
|
|
|
PDFEncryptor.Encrypt();
|
|
|
|
MessageBox.Show("PDF document successfully encrypted", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
MessageBox.Show("Error: " + ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
|
|
}
|
|
}
|
|
|
|
this.Close();
|
|
}
|
|
|
|
private void MainForm_Load(object sender, System.EventArgs e)
|
|
{
|
|
cbEncryptionAlgorithm.SelectedIndex = 2;
|
|
}
|
|
|
|
private void btnCancel_Click(object sender, System.EventArgs e)
|
|
{
|
|
this.Close();
|
|
}
|
|
}
|
|
}
|
|
|
|
|