/*
 * 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;
        }
    }
}