securebb-win-demos/PDF Signer (WinForms)/pdfsigner.cs

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2024-08-08 13:09:34 +06:00
/*
* SecureBlackbox 2024 .NET Edition - Sample Project
*
* This sample project demonstrates the usage of SecureBlackbox in a
* simple, straightforward way. It is not intended to be a complete
* application. Error handling and other checks are simplified for clarity.
*
* www.nsoftware.com/secureblackbox
*
* This code is subject to the terms and conditions specified in the
* corresponding product license agreement which outlines the authorized
* usage and restrictions.
*
*/
using System;
using System.Windows.Forms;
using nsoftware.SecureBlackbox;
namespace PDFSignerDemo
{
/// <summary>
/// Summary description for frmMain.
/// </summary>
public class MainForm : System.Windows.Forms.Form
{
private System.Windows.Forms.Label lbInputFile;
private System.Windows.Forms.TextBox edInputFile;
private System.Windows.Forms.Button sbBrowseInputFile;
private System.Windows.Forms.OpenFileDialog dlgOpen;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
private System.Windows.Forms.Button btnSign;
private TextBox edOutputFile;
private Button button1;
private Label label2;
private SaveFileDialog dlgSave;
public CheckBox cbVisible;
public TextBox edTimestampServer;
public CheckBox cbTimestamp;
private Label label1;
private ComboBox cbLevel;
private Button btnBrowseCert;
private TextBox edCertPassword;
private TextBox edSigningCertificate;
private Label lCertPassword;
private Label label6;
private Label label7;
private GroupBox groupBox5;
private ComboBox cbHashAlgorithm;
private Label label4;
private ComboBox cbSignatureType;
private Label label3;
private PDFSigner signer;
public MainForm()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
signer = new PDFSigner();
cbSignatureType.SelectedIndex = 1;
cbLevel.SelectedIndex = 5;
cbHashAlgorithm.SelectedIndex = 2;
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (components != null)
{
components.Dispose();
signer.Dispose();
}
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.lbInputFile = new System.Windows.Forms.Label();
this.edInputFile = new System.Windows.Forms.TextBox();
this.sbBrowseInputFile = new System.Windows.Forms.Button();
this.btnSign = new System.Windows.Forms.Button();
this.dlgOpen = new System.Windows.Forms.OpenFileDialog();
this.edOutputFile = new System.Windows.Forms.TextBox();
this.button1 = new System.Windows.Forms.Button();
this.label2 = new System.Windows.Forms.Label();
this.dlgSave = new System.Windows.Forms.SaveFileDialog();
this.cbVisible = new System.Windows.Forms.CheckBox();
this.edTimestampServer = new System.Windows.Forms.TextBox();
this.cbTimestamp = new System.Windows.Forms.CheckBox();
this.label1 = new System.Windows.Forms.Label();
this.cbLevel = new System.Windows.Forms.ComboBox();
this.btnBrowseCert = new System.Windows.Forms.Button();
this.edCertPassword = new System.Windows.Forms.TextBox();
this.edSigningCertificate = new System.Windows.Forms.TextBox();
this.lCertPassword = new System.Windows.Forms.Label();
this.label6 = new System.Windows.Forms.Label();
this.label7 = new System.Windows.Forms.Label();
this.groupBox5 = new System.Windows.Forms.GroupBox();
this.cbSignatureType = new System.Windows.Forms.ComboBox();
this.label3 = new System.Windows.Forms.Label();
this.cbHashAlgorithm = new System.Windows.Forms.ComboBox();
this.label4 = new System.Windows.Forms.Label();
this.groupBox5.SuspendLayout();
this.SuspendLayout();
//
// lbInputFile
//
this.lbInputFile.AutoSize = true;
this.lbInputFile.Location = new System.Drawing.Point(14, 33);
this.lbInputFile.Name = "lbInputFile";
this.lbInputFile.Size = new System.Drawing.Size(50, 13);
this.lbInputFile.TabIndex = 0;
this.lbInputFile.Text = "Input file:";
//
// edInputFile
//
this.edInputFile.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.edInputFile.Location = new System.Drawing.Point(70, 30);
this.edInputFile.Name = "edInputFile";
this.edInputFile.Size = new System.Drawing.Size(296, 20);
this.edInputFile.TabIndex = 1;
//
// sbBrowseInputFile
//
this.sbBrowseInputFile.Location = new System.Drawing.Point(372, 27);
this.sbBrowseInputFile.Name = "sbBrowseInputFile";
this.sbBrowseInputFile.Size = new System.Drawing.Size(75, 25);
this.sbBrowseInputFile.TabIndex = 2;
this.sbBrowseInputFile.Text = "Browse...";
this.sbBrowseInputFile.Click += new System.EventHandler(this.sbBrowseInputFile_Click);
//
// btnSign
//
this.btnSign.Location = new System.Drawing.Point(586, 231);
this.btnSign.Name = "btnSign";
this.btnSign.Size = new System.Drawing.Size(75, 25);
this.btnSign.TabIndex = 8;
this.btnSign.Text = "Sign";
this.btnSign.Click += new System.EventHandler(this.btnSign_Click);
//
// edOutputFile
//
this.edOutputFile.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.edOutputFile.Location = new System.Drawing.Point(70, 60);
this.edOutputFile.Name = "edOutputFile";
this.edOutputFile.Size = new System.Drawing.Size(296, 20);
this.edOutputFile.TabIndex = 3;
//
// button1
//
this.button1.Location = new System.Drawing.Point(372, 57);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(75, 25);
this.button1.TabIndex = 4;
this.button1.Text = "Browse...";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// label2
//
this.label2.AutoSize = true;
this.label2.Location = new System.Drawing.Point(6, 63);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(58, 13);
this.label2.TabIndex = 18;
this.label2.Text = "Output file:";
//
// cbVisible
//
this.cbVisible.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.cbVisible.AutoSize = true;
this.cbVisible.Location = new System.Drawing.Point(536, 103);
this.cbVisible.Name = "cbVisible";
this.cbVisible.Size = new System.Drawing.Size(102, 17);
this.cbVisible.TabIndex = 8;
this.cbVisible.Text = "Visible signature";
//
// edTimestampServer
//
this.edTimestampServer.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.edTimestampServer.Location = new System.Drawing.Point(10, 98);
this.edTimestampServer.Name = "edTimestampServer";
this.edTimestampServer.Size = new System.Drawing.Size(351, 20);
this.edTimestampServer.TabIndex = 5;
this.edTimestampServer.Text = "http://";
//
// cbTimestamp
//
this.cbTimestamp.AutoSize = true;
this.cbTimestamp.Location = new System.Drawing.Point(10, 78);
this.cbTimestamp.Name = "cbTimestamp";
this.cbTimestamp.Size = new System.Drawing.Size(207, 17);
this.cbTimestamp.TabIndex = 4;
this.cbTimestamp.Text = "Request a timestamp from TSA server:";
//
// label1
//
this.label1.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(494, 52);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(36, 13);
this.label1.TabIndex = 34;
this.label1.Text = "Level:";
//
// cbLevel
//
this.cbLevel.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.cbLevel.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
this.cbLevel.FormattingEnabled = true;
this.cbLevel.Items.AddRange(new object[] {
"Generic/Legacy",
"Baseline B",
"Baseline T",
"Baseline LT",
"Baseline LTA",
"BES",
"EPES",
"LTV"});
this.cbLevel.Location = new System.Drawing.Point(536, 49);
this.cbLevel.Name = "cbLevel";
this.cbLevel.Size = new System.Drawing.Size(128, 21);
this.cbLevel.TabIndex = 6;
//
// btnBrowseCert
//
this.btnBrowseCert.Location = new System.Drawing.Point(367, 21);
this.btnBrowseCert.Name = "btnBrowseCert";
this.btnBrowseCert.Size = new System.Drawing.Size(75, 25);
this.btnBrowseCert.TabIndex = 2;
this.btnBrowseCert.Text = "Browse...";
this.btnBrowseCert.Click += new System.EventHandler(this.btnBrowseCert_Click);
//
// edCertPassword
//
this.edCertPassword.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.edCertPassword.Location = new System.Drawing.Point(107, 51);
this.edCertPassword.Name = "edCertPassword";
this.edCertPassword.PasswordChar = '*';
this.edCertPassword.Size = new System.Drawing.Size(230, 20);
this.edCertPassword.TabIndex = 3;
//
// edSigningCertificate
//
this.edSigningCertificate.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.edSigningCertificate.Location = new System.Drawing.Point(107, 24);
this.edSigningCertificate.Name = "edSigningCertificate";
this.edSigningCertificate.Size = new System.Drawing.Size(254, 20);
this.edSigningCertificate.TabIndex = 1;
//
// lCertPassword
//
this.lCertPassword.AutoSize = true;
this.lCertPassword.Location = new System.Drawing.Point(45, 54);
this.lCertPassword.Name = "lCertPassword";
this.lCertPassword.Size = new System.Drawing.Size(56, 13);
this.lCertPassword.TabIndex = 40;
this.lCertPassword.Text = "Password:";
//
// label6
//
this.label6.AutoSize = true;
this.label6.Location = new System.Drawing.Point(7, 27);
this.label6.Name = "label6";
this.label6.Size = new System.Drawing.Size(94, 13);
this.label6.TabIndex = 44;
this.label6.Text = "Signing certificate:";
//
// label7
//
this.label7.AutoSize = true;
this.label7.ForeColor = System.Drawing.SystemColors.Highlight;
this.label7.Location = new System.Drawing.Point(5, 5);
this.label7.Name = "label7";
this.label7.Size = new System.Drawing.Size(643, 13);
this.label7.TabIndex = 45;
this.label7.Text = "This sample illustrates the use of PDFSigner component for signing PDF documents." +
" Please pick the signing certificate and click \'Sign\'. ";
//
// groupBox5
//
this.groupBox5.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.groupBox5.Controls.Add(this.cbSignatureType);
this.groupBox5.Controls.Add(this.label3);
this.groupBox5.Controls.Add(this.edTimestampServer);
this.groupBox5.Controls.Add(this.cbHashAlgorithm);
this.groupBox5.Controls.Add(this.cbTimestamp);
this.groupBox5.Controls.Add(this.label4);
this.groupBox5.Controls.Add(this.cbLevel);
this.groupBox5.Controls.Add(this.cbVisible);
this.groupBox5.Controls.Add(this.label6);
this.groupBox5.Controls.Add(this.btnBrowseCert);
this.groupBox5.Controls.Add(this.label1);
this.groupBox5.Controls.Add(this.edCertPassword);
this.groupBox5.Controls.Add(this.lCertPassword);
this.groupBox5.Controls.Add(this.edSigningCertificate);
this.groupBox5.Location = new System.Drawing.Point(5, 95);
this.groupBox5.Name = "groupBox5";
this.groupBox5.Size = new System.Drawing.Size(670, 130);
this.groupBox5.TabIndex = 5;
this.groupBox5.TabStop = false;
this.groupBox5.Text = "Signing options ";
//
// cbSignatureType
//
this.cbSignatureType.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.cbSignatureType.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
this.cbSignatureType.FormattingEnabled = true;
this.cbSignatureType.Items.AddRange(new object[] {
"Legacy",
"PAdES",
"DocumentTimestamp"});
this.cbSignatureType.Location = new System.Drawing.Point(536, 24);
this.cbSignatureType.Name = "cbSignatureType";
this.cbSignatureType.Size = new System.Drawing.Size(128, 21);
this.cbSignatureType.TabIndex = 47;
this.cbSignatureType.SelectionChangeCommitted += new System.EventHandler(this.cbSignatureType_SelectionChangeCommitted);
//
// label3
//
this.label3.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.label3.AutoSize = true;
this.label3.Location = new System.Drawing.Point(448, 27);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(82, 13);
this.label3.TabIndex = 48;
this.label3.Text = "Signature Type:";
//
// cbHashAlgorithm
//
this.cbHashAlgorithm.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.cbHashAlgorithm.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
this.cbHashAlgorithm.Items.AddRange(new object[] {
"SHA1",
"MD5",
"SHA256",
"SHA384",
"SHA512",
"RIPEMD160"});
this.cbHashAlgorithm.Location = new System.Drawing.Point(536, 76);
this.cbHashAlgorithm.Name = "cbHashAlgorithm";
this.cbHashAlgorithm.Size = new System.Drawing.Size(128, 21);
this.cbHashAlgorithm.TabIndex = 7;
//
// label4
//
this.label4.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.label4.AutoSize = true;
this.label4.Location = new System.Drawing.Point(450, 79);
this.label4.Name = "label4";
this.label4.Size = new System.Drawing.Size(80, 13);
this.label4.TabIndex = 46;
this.label4.Text = "Hash algorithm:";
//
// MainForm
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(681, 263);
this.Controls.Add(this.groupBox5);
this.Controls.Add(this.label7);
this.Controls.Add(this.edOutputFile);
this.Controls.Add(this.button1);
this.Controls.Add(this.label2);
this.Controls.Add(this.edInputFile);
this.Controls.Add(this.btnSign);
this.Controls.Add(this.sbBrowseInputFile);
this.Controls.Add(this.lbInputFile);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
this.MaximizeBox = false;
this.Name = "MainForm";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "PDF Signer Demo";
this.groupBox5.ResumeLayout(false);
this.groupBox5.PerformLayout();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new MainForm());
}
private void sbBrowseInputFile_Click(object sender, System.EventArgs e)
{
dlgOpen.InitialDirectory = Application.StartupPath;
dlgOpen.Filter = "PDF files (*.pdf)|*.pdf|All files (*.*)|*.*";
dlgOpen.FileName = edInputFile.Text;
if (dlgOpen.ShowDialog() == DialogResult.OK)
edInputFile.Text = dlgOpen.FileName;
}
public Certificate LoadCertificate(string file, string password)
{
Certificate cert = null;
if (file.Length > 0)
{
try
{
CertificateManager certmanager = new CertificateManager();
certmanager.ImportFromFile(file, password);
cert = certmanager.Certificate;
}
catch (Exception e)
{
MessageBox.Show("Cannot load certificate!");
}
}
return cert;
}
private void btnSign_Click(object sender, System.EventArgs e)
{
signer.InputFile = edInputFile.Text;
signer.OutputFile = edOutputFile.Text;
signer.SigningCertificate = LoadCertificate(edSigningCertificate.Text, edCertPassword.Text);
if (signer.SigningCertificate.KeyAlgorithm.Contains("id-dsa"))
{
MessageBox.Show("The certificate was found to contain a DSA key. The hash algorithm has been switched to SHA1.");
signer.NewSignature.HashAlgorithm = "SHA1";
}
if (cbSignatureType.SelectedIndex == 0)
signer.NewSignature.SignatureType = PDFSignatureTypes.pstLegacy;
else if (cbSignatureType.SelectedIndex == 2)
signer.NewSignature.SignatureType = PDFSignatureTypes.pstDocumentTimestamp;
else
{
signer.NewSignature.SignatureType = PDFSignatureTypes.pstPAdES;
switch (cbLevel.SelectedIndex)
{
case 0: signer.NewSignature.Level = PAdESSignatureLevels.paslGeneric; break;
case 1: signer.NewSignature.Level = PAdESSignatureLevels.paslBaselineB; break;
case 2: signer.NewSignature.Level = PAdESSignatureLevels.paslBaselineT; break;
case 3: signer.NewSignature.Level = PAdESSignatureLevels.paslBaselineLT; break;
case 4: signer.NewSignature.Level = PAdESSignatureLevels.paslBaselineLTA; break;
case 5: signer.NewSignature.Level = PAdESSignatureLevels.paslBES; break;
case 6: signer.NewSignature.Level = PAdESSignatureLevels.paslEPES; break;
case 7: signer.NewSignature.Level = PAdESSignatureLevels.paslLTV; break;
}
}
signer.NewSignature.HashAlgorithm = cbHashAlgorithm.Text;
signer.Widget.Invisible = !cbVisible.Checked;
signer.NewSignature.PolicyID = "1.2.3.4.5";
if (cbTimestamp.Checked)
signer.TimestampServer = edTimestampServer.Text;
else
signer.TimestampServer = "";
try
{
signer.Sign();
MessageBox.Show("PDF file successfully signed");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void button1_Click(object sender, EventArgs e)
{
dlgSave.InitialDirectory = Application.StartupPath;
dlgSave.Filter = "PDF files (*.pdf)|*.pdf|All files (*.*)|*.*";
dlgSave.FileName = edInputFile.Text;
if (dlgSave.ShowDialog() == DialogResult.OK)
edOutputFile.Text = dlgSave.FileName;
}
private string RequestPassword()
{
frmRequestPassword dlg = new frmRequestPassword();
string s = "";
if (dlg.ShowDialog() == DialogResult.OK)
{
s = dlg.tbInput.Text;
}
dlg.Dispose();
return s;
}
private void btnBrowseCert_Click(object sender, EventArgs e)
{
dlgOpen.Filter = "PEM-encoded certificate (*.pem)|*.PEM|DER-encoded certificate (*.cer)|*.CER|PFX-encoded certificate (*.pfx)|*.PFX";
if (dlgOpen.ShowDialog() == DialogResult.OK)
edSigningCertificate.Text = dlgOpen.FileName;
}
private void cbSignatureType_SelectionChangeCommitted(object sender, EventArgs e)
{
cbLevel.Enabled = cbSignatureType.SelectedIndex == 1;
}
}
}