using System;
using System.Windows.Forms;
using nsoftware.SecureBlackbox;

namespace PDFVerifierDemo
{
	/// <summary>
	/// Summary description for SignForm.
	/// </summary>
	public class SignForm : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button btnCancel;
		private System.Windows.Forms.Button btnOK;
		private System.Windows.Forms.OpenFileDialog dlgOpen;
		/// <summary>
		/// Required designer variable.
		/// </summary>
        private System.ComponentModel.Container components = null;
        public TextBox edSignatureName;
        private Label lbSignatureName;
        public TextBox edSerialNumber;
        private Label label1;
        public TextBox edSubjectKeyID;
        private Label label2;
        public TextBox edIssuerRDN;
        private Label label3;
        private GroupBox gbSigningCertificates;
        public ListView lvKnownCertificates;
        private ColumnHeader chSerial;
        private ColumnHeader chIssuer;
        private Button btnRemove;
        private Button btnAdd;
        private PDFVerifier FVerifier = null;

        public SignForm(PDFVerifier verifier)
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

            //
            // TODO: Add any constructor code after InitializeComponent call
            //

            FVerifier = verifier;
        }

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if(components != null)
				{
					components.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.btnCancel = new System.Windows.Forms.Button();
            this.btnOK = new System.Windows.Forms.Button();
            this.dlgOpen = new System.Windows.Forms.OpenFileDialog();
            this.edSignatureName = new System.Windows.Forms.TextBox();
            this.lbSignatureName = new System.Windows.Forms.Label();
            this.edSerialNumber = new System.Windows.Forms.TextBox();
            this.label1 = new System.Windows.Forms.Label();
            this.edSubjectKeyID = new System.Windows.Forms.TextBox();
            this.label2 = new System.Windows.Forms.Label();
            this.edIssuerRDN = new System.Windows.Forms.TextBox();
            this.label3 = new System.Windows.Forms.Label();
            this.gbSigningCertificates = new System.Windows.Forms.GroupBox();
            this.lvKnownCertificates = new System.Windows.Forms.ListView();
            this.chSerial = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
            this.chIssuer = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
            this.btnRemove = new System.Windows.Forms.Button();
            this.btnAdd = new System.Windows.Forms.Button();
            this.gbSigningCertificates.SuspendLayout();
            this.SuspendLayout();
            // 
            // btnCancel
            // 
            this.btnCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
            this.btnCancel.Location = new System.Drawing.Point(250, 255);
            this.btnCancel.Name = "btnCancel";
            this.btnCancel.Size = new System.Drawing.Size(75, 25);
            this.btnCancel.TabIndex = 7;
            this.btnCancel.Text = "Cancel";
            // 
            // btnOK
            // 
            this.btnOK.DialogResult = System.Windows.Forms.DialogResult.OK;
            this.btnOK.Location = new System.Drawing.Point(165, 255);
            this.btnOK.Name = "btnOK";
            this.btnOK.Size = new System.Drawing.Size(75, 25);
            this.btnOK.TabIndex = 6;
            this.btnOK.Text = "OK";
            // 
            // edSignatureName
            // 
            this.edSignatureName.Enabled = false;
            this.edSignatureName.Location = new System.Drawing.Point(100, 20);
            this.edSignatureName.Name = "edSignatureName";
            this.edSignatureName.ReadOnly = true;
            this.edSignatureName.Size = new System.Drawing.Size(220, 20);
            this.edSignatureName.TabIndex = 20;
            // 
            // lbSignatureName
            // 
            this.lbSignatureName.AutoSize = true;
            this.lbSignatureName.Location = new System.Drawing.Point(7, 23);
            this.lbSignatureName.Name = "lbSignatureName";
            this.lbSignatureName.Size = new System.Drawing.Size(84, 13);
            this.lbSignatureName.TabIndex = 19;
            this.lbSignatureName.Text = "Signature name:";
            // 
            // edSerialNumber
            // 
            this.edSerialNumber.Enabled = false;
            this.edSerialNumber.Location = new System.Drawing.Point(100, 80);
            this.edSerialNumber.Name = "edSerialNumber";
            this.edSerialNumber.ReadOnly = true;
            this.edSerialNumber.Size = new System.Drawing.Size(220, 20);
            this.edSerialNumber.TabIndex = 22;
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(7, 83);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(76, 13);
            this.label1.TabIndex = 21;
            this.label1.Text = "Serial Number:";
            // 
            // edSubjectKeyID
            // 
            this.edSubjectKeyID.Enabled = false;
            this.edSubjectKeyID.Location = new System.Drawing.Point(100, 110);
            this.edSubjectKeyID.Name = "edSubjectKeyID";
            this.edSubjectKeyID.ReadOnly = true;
            this.edSubjectKeyID.Size = new System.Drawing.Size(220, 20);
            this.edSubjectKeyID.TabIndex = 24;
            // 
            // label2
            // 
            this.label2.AutoSize = true;
            this.label2.Location = new System.Drawing.Point(7, 113);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(78, 13);
            this.label2.TabIndex = 23;
            this.label2.Text = "Subject KeyID:";
            // 
            // edIssuerRDN
            // 
            this.edIssuerRDN.Enabled = false;
            this.edIssuerRDN.Location = new System.Drawing.Point(100, 50);
            this.edIssuerRDN.Name = "edIssuerRDN";
            this.edIssuerRDN.ReadOnly = true;
            this.edIssuerRDN.Size = new System.Drawing.Size(220, 20);
            this.edIssuerRDN.TabIndex = 26;
            // 
            // label3
            // 
            this.label3.AutoSize = true;
            this.label3.Location = new System.Drawing.Point(7, 53);
            this.label3.Name = "label3";
            this.label3.Size = new System.Drawing.Size(65, 13);
            this.label3.TabIndex = 25;
            this.label3.Text = "Issuer RDN:";
            // 
            // gbSigningCertificates
            // 
            this.gbSigningCertificates.Controls.Add(this.lvKnownCertificates);
            this.gbSigningCertificates.Controls.Add(this.btnRemove);
            this.gbSigningCertificates.Controls.Add(this.btnAdd);
            this.gbSigningCertificates.Location = new System.Drawing.Point(5, 145);
            this.gbSigningCertificates.Name = "gbSigningCertificates";
            this.gbSigningCertificates.Size = new System.Drawing.Size(320, 100);
            this.gbSigningCertificates.TabIndex = 27;
            this.gbSigningCertificates.TabStop = false;
            this.gbSigningCertificates.Text = "Known Certificates";
            // 
            // lvKnownCertificates
            // 
            this.lvKnownCertificates.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
            | System.Windows.Forms.AnchorStyles.Left) 
            | System.Windows.Forms.AnchorStyles.Right)));
            this.lvKnownCertificates.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
            this.chSerial,
            this.chIssuer});
            this.lvKnownCertificates.HideSelection = false;
            this.lvKnownCertificates.Location = new System.Drawing.Point(5, 20);
            this.lvKnownCertificates.Name = "lvKnownCertificates";
            this.lvKnownCertificates.Size = new System.Drawing.Size(230, 75);
            this.lvKnownCertificates.TabIndex = 4;
            this.lvKnownCertificates.UseCompatibleStateImageBehavior = false;
            this.lvKnownCertificates.View = System.Windows.Forms.View.Details;
            // 
            // chSerial
            // 
            this.chSerial.Text = "Serial";
            this.chSerial.Width = 90;
            // 
            // chIssuer
            // 
            this.chIssuer.Text = "Issuer";
            this.chIssuer.Width = 130;
            // 
            // btnRemove
            // 
            this.btnRemove.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
            this.btnRemove.Location = new System.Drawing.Point(240, 50);
            this.btnRemove.Name = "btnRemove";
            this.btnRemove.Size = new System.Drawing.Size(75, 25);
            this.btnRemove.TabIndex = 3;
            this.btnRemove.Text = "Remove";
            this.btnRemove.Click += new System.EventHandler(this.btnRemove_Click);
            // 
            // btnAdd
            // 
            this.btnAdd.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
            this.btnAdd.Location = new System.Drawing.Point(240, 20);
            this.btnAdd.Name = "btnAdd";
            this.btnAdd.Size = new System.Drawing.Size(75, 25);
            this.btnAdd.TabIndex = 2;
            this.btnAdd.Text = "Add";
            this.btnAdd.Click += new System.EventHandler(this.btnAdd_Click);
            // 
            // SignForm
            // 
            this.AcceptButton = this.btnOK;
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.CancelButton = this.btnCancel;
            this.ClientSize = new System.Drawing.Size(329, 286);
            this.Controls.Add(this.gbSigningCertificates);
            this.Controls.Add(this.edIssuerRDN);
            this.Controls.Add(this.label3);
            this.Controls.Add(this.edSubjectKeyID);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.edSerialNumber);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.edSignatureName);
            this.Controls.Add(this.lbSignatureName);
            this.Controls.Add(this.btnCancel);
            this.Controls.Add(this.btnOK);
            this.Cursor = System.Windows.Forms.Cursors.Default;
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
            this.MaximizeBox = false;
            this.Name = "SignForm";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
            this.Text = "Signature Options";
            this.gbSigningCertificates.ResumeLayout(false);
            this.ResumeLayout(false);
            this.PerformLayout();

		}
        #endregion

        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 string RequestPassword()
        {
            frmRequestPassword dlg = new frmRequestPassword();
            string s = "";
            if (dlg.ShowDialog() == DialogResult.OK)
            {
                s = dlg.tbInput.Text;
            }
            dlg.Dispose();
            return s;
        }

        public void UpdateCertificates()
        {
            lvKnownCertificates.BeginUpdate();
            lvKnownCertificates.Items.Clear();

            for (int i = 0; i < FVerifier.KnownCertificates.Count; i++)
            {
                string s = FVerifier.KnownCertificates[i].Issuer;
                if (s == "")
                    s = "<unknown>";
                
                ListViewItem Item = lvKnownCertificates.Items.Add(BitConverter.ToString(FVerifier.KnownCertificates[i].SerialNumber));
                Item.SubItems.Add(s);
            }

            lvKnownCertificates.EndUpdate();
        }

        private void btnAdd_Click(object sender, EventArgs e)
        {
            dlgOpen.Title = "Select certificate file";
            dlgOpen.Filter = "PEM-encoded certificate (*.pem)|*.PEM|DER-encoded certificate (*.cer)|*.CER|PFX-encoded certificate (*.pfx)|*.PFX";
            if (dlgOpen.ShowDialog() == DialogResult.OK)
            {
                Certificate cert = LoadCertificate(dlgOpen.FileName, RequestPassword());
                FVerifier.KnownCertificates.Add(cert);

                UpdateCertificates();
            }
        }

        private void btnRemove_Click(object sender, EventArgs e)
        {
            if (lvKnownCertificates.SelectedItems.Count > 0)
            {
                FVerifier.KnownCertificates.RemoveAt(lvKnownCertificates.SelectedItems[0].Index);

                UpdateCertificates();
            }
        }
    }
}