671 lines
28 KiB
C#
671 lines
28 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 CAdESVerifierDemo
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{
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/// <summary>
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/// Summary description for frmMain.
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/// </summary>
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public class frmMain : System.Windows.Forms.Form
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{
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private System.Windows.Forms.Label lbInputFile;
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private System.Windows.Forms.TextBox edInputFile;
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private System.Windows.Forms.Button sbBrowseInputFile;
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private System.Windows.Forms.OpenFileDialog dlgOpen;
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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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private System.Windows.Forms.Button btnVerify;
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private SignForm frmSign = null;
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private CAdESVerifier verifier;
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private TextBox edDataFile;
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private Button sbBrowseDataFile;
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private Label lDataFile;
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private SaveFileDialog dlgSave;
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private Label label5;
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private GroupBox groupBox4;
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private GroupBox groupBox3;
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public ListView lvTrustedCertificates;
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private ColumnHeader columnHeader3;
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private ColumnHeader columnHeader4;
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private Button btnRemoveTrusted;
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private Button btnAddTrusted;
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public CheckBox cbPerformRevocationCheck;
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private GroupBox groupBox2;
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public ListView lvKnownCertificates;
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private ColumnHeader columnHeader1;
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private ColumnHeader columnHeader2;
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private Button btnRemoveKnown;
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private Button bthAddKnown;
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public CheckBox cbIgnoreChainValidationErrors;
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public CheckBox cbForceCompleteChainValidation;
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private OpenFileDialog openDialogCert;
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public CheckBox cbOfflineMode;
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private CheckBox cbDetached;
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public frmMain()
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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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verifier = new CAdESVerifier();
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verifier.OnSignatureFound += new CAdESVerifier.OnSignatureFoundHandler(SignatureFound);
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frmSign = new SignForm(verifier);
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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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frmSign.Dispose();
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verifier.Dispose();
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}
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}
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base.Dispose(disposing);
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}
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private void SignatureFound(object s, CAdESVerifierSignatureFoundEventArgs e)
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{
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if (e.CertFound)
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{
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e.ValidateSignature = true;
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e.ValidateChain = true;
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}
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else
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{
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SignForm dlg = new SignForm(verifier);
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dlg.edIssuerRDN.Text = e.IssuerRDN;
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dlg.edSerialNumber.Text = BitConverter.ToString(e.SerialNumber);
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dlg.edSubjectKeyID.Text = BitConverter.ToString(e.SubjectKeyID);
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dlg.UpdateCertificates();
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if (dlg.ShowDialog() == DialogResult.OK)
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{
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e.ValidateSignature = true;
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e.ValidateChain = true;
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}
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else
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{
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e.ValidateSignature = false;
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e.ValidateChain = false;
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}
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}
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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.lbInputFile = new System.Windows.Forms.Label();
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this.edInputFile = new System.Windows.Forms.TextBox();
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this.sbBrowseInputFile = new System.Windows.Forms.Button();
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this.btnVerify = new System.Windows.Forms.Button();
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this.dlgOpen = new System.Windows.Forms.OpenFileDialog();
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this.edDataFile = new System.Windows.Forms.TextBox();
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this.sbBrowseDataFile = new System.Windows.Forms.Button();
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this.lDataFile = new System.Windows.Forms.Label();
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this.cbDetached = new System.Windows.Forms.CheckBox();
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this.dlgSave = new System.Windows.Forms.SaveFileDialog();
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this.label5 = new System.Windows.Forms.Label();
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this.groupBox4 = new System.Windows.Forms.GroupBox();
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this.groupBox3 = new System.Windows.Forms.GroupBox();
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this.lvTrustedCertificates = new System.Windows.Forms.ListView();
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this.columnHeader3 = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
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this.columnHeader4 = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
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this.btnRemoveTrusted = new System.Windows.Forms.Button();
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this.btnAddTrusted = new System.Windows.Forms.Button();
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this.cbPerformRevocationCheck = new System.Windows.Forms.CheckBox();
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this.groupBox2 = new System.Windows.Forms.GroupBox();
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this.lvKnownCertificates = new System.Windows.Forms.ListView();
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this.columnHeader1 = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
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this.columnHeader2 = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
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this.btnRemoveKnown = new System.Windows.Forms.Button();
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this.bthAddKnown = new System.Windows.Forms.Button();
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this.cbIgnoreChainValidationErrors = new System.Windows.Forms.CheckBox();
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this.cbForceCompleteChainValidation = new System.Windows.Forms.CheckBox();
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this.openDialogCert = new System.Windows.Forms.OpenFileDialog();
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this.cbOfflineMode = new System.Windows.Forms.CheckBox();
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this.groupBox4.SuspendLayout();
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this.groupBox3.SuspendLayout();
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this.groupBox2.SuspendLayout();
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this.SuspendLayout();
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//
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// lbInputFile
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//
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this.lbInputFile.Location = new System.Drawing.Point(8, 36);
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this.lbInputFile.Name = "lbInputFile";
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this.lbInputFile.Size = new System.Drawing.Size(60, 13);
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this.lbInputFile.TabIndex = 0;
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this.lbInputFile.Text = "Input file:";
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//
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// edInputFile
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//
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this.edInputFile.Location = new System.Drawing.Point(73, 33);
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this.edInputFile.Name = "edInputFile";
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this.edInputFile.Size = new System.Drawing.Size(347, 20);
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this.edInputFile.TabIndex = 1;
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//
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// sbBrowseInputFile
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//
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this.sbBrowseInputFile.Location = new System.Drawing.Point(426, 30);
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this.sbBrowseInputFile.Name = "sbBrowseInputFile";
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this.sbBrowseInputFile.Size = new System.Drawing.Size(75, 25);
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this.sbBrowseInputFile.TabIndex = 2;
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this.sbBrowseInputFile.Text = "Browse ...";
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this.sbBrowseInputFile.Click += new System.EventHandler(this.sbBrowseXMLFile_Click);
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//
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// btnVerify
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//
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this.btnVerify.Location = new System.Drawing.Point(655, 300);
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this.btnVerify.Name = "btnVerify";
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this.btnVerify.Size = new System.Drawing.Size(75, 25);
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this.btnVerify.TabIndex = 8;
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this.btnVerify.Text = "Verify";
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this.btnVerify.Click += new System.EventHandler(this.btnVerify_Click);
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//
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// edDataFile
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//
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this.edDataFile.Location = new System.Drawing.Point(73, 97);
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this.edDataFile.Name = "edDataFile";
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this.edDataFile.Size = new System.Drawing.Size(347, 20);
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this.edDataFile.TabIndex = 10;
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//
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// sbBrowseDataFile
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//
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this.sbBrowseDataFile.Location = new System.Drawing.Point(426, 94);
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this.sbBrowseDataFile.Name = "sbBrowseDataFile";
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this.sbBrowseDataFile.Size = new System.Drawing.Size(75, 25);
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this.sbBrowseDataFile.TabIndex = 11;
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this.sbBrowseDataFile.Text = "Browse ...";
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this.sbBrowseDataFile.Click += new System.EventHandler(this.sbBrowseDataFile_Click);
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//
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// lDataFile
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//
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this.lDataFile.Location = new System.Drawing.Point(8, 100);
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this.lDataFile.Name = "lDataFile";
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this.lDataFile.Size = new System.Drawing.Size(60, 13);
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this.lDataFile.TabIndex = 9;
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this.lDataFile.Text = "Output file:";
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//
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// cbDetached
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//
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this.cbDetached.AutoSize = true;
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this.cbDetached.Location = new System.Drawing.Point(11, 68);
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this.cbDetached.Name = "cbDetached";
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this.cbDetached.Size = new System.Drawing.Size(73, 17);
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this.cbDetached.TabIndex = 12;
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this.cbDetached.Text = "Detached";
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this.cbDetached.UseVisualStyleBackColor = true;
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this.cbDetached.CheckedChanged += new System.EventHandler(this.cbDetached_CheckedChanged);
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//
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// label5
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//
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this.label5.ForeColor = System.Drawing.SystemColors.Highlight;
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this.label5.Location = new System.Drawing.Point(5, 5);
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this.label5.Name = "label5";
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this.label5.Size = new System.Drawing.Size(725, 13);
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this.label5.TabIndex = 71;
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this.label5.Text = "This sample shows processing of CAdES signatures. Please select a .p7s or .p7m fi" +
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"le, tune up validation settings, and click \'Verify\' when ready.";
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//
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// groupBox4
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//
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this.groupBox4.Controls.Add(this.cbOfflineMode);
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this.groupBox4.Controls.Add(this.groupBox3);
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this.groupBox4.Controls.Add(this.cbPerformRevocationCheck);
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this.groupBox4.Controls.Add(this.groupBox2);
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this.groupBox4.Controls.Add(this.cbIgnoreChainValidationErrors);
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this.groupBox4.Controls.Add(this.cbForceCompleteChainValidation);
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this.groupBox4.Location = new System.Drawing.Point(5, 125);
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this.groupBox4.Name = "groupBox4";
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this.groupBox4.Size = new System.Drawing.Size(725, 160);
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this.groupBox4.TabIndex = 72;
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this.groupBox4.TabStop = false;
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this.groupBox4.Text = "Validation settings ";
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//
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// groupBox3
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//
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this.groupBox3.Controls.Add(this.lvTrustedCertificates);
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this.groupBox3.Controls.Add(this.btnRemoveTrusted);
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this.groupBox3.Controls.Add(this.btnAddTrusted);
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this.groupBox3.Location = new System.Drawing.Point(370, 60);
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this.groupBox3.Name = "groupBox3";
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this.groupBox3.Size = new System.Drawing.Size(350, 95);
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this.groupBox3.TabIndex = 17;
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this.groupBox3.TabStop = false;
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this.groupBox3.Text = "Trusted Certificates";
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//
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// lvTrustedCertificates
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//
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this.lvTrustedCertificates.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
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this.columnHeader3,
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this.columnHeader4});
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this.lvTrustedCertificates.HideSelection = false;
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this.lvTrustedCertificates.Location = new System.Drawing.Point(5, 20);
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this.lvTrustedCertificates.Name = "lvTrustedCertificates";
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this.lvTrustedCertificates.Size = new System.Drawing.Size(260, 70);
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this.lvTrustedCertificates.TabIndex = 4;
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this.lvTrustedCertificates.UseCompatibleStateImageBehavior = false;
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this.lvTrustedCertificates.View = System.Windows.Forms.View.Details;
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//
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// columnHeader3
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//
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this.columnHeader3.Text = "Serial";
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this.columnHeader3.Width = 90;
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//
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// columnHeader4
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//
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this.columnHeader4.Text = "Issuer";
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this.columnHeader4.Width = 160;
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//
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// btnRemoveTrusted
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//
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this.btnRemoveTrusted.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
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this.btnRemoveTrusted.Location = new System.Drawing.Point(270, 51);
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this.btnRemoveTrusted.Name = "btnRemoveTrusted";
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this.btnRemoveTrusted.Size = new System.Drawing.Size(75, 25);
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this.btnRemoveTrusted.TabIndex = 3;
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this.btnRemoveTrusted.Text = "Remove";
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this.btnRemoveTrusted.Click += new System.EventHandler(this.btnRemoveTrusted_Click);
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//
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// btnAddTrusted
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//
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this.btnAddTrusted.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
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this.btnAddTrusted.Location = new System.Drawing.Point(270, 20);
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this.btnAddTrusted.Name = "btnAddTrusted";
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this.btnAddTrusted.Size = new System.Drawing.Size(75, 25);
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this.btnAddTrusted.TabIndex = 2;
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this.btnAddTrusted.Text = "Add";
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this.btnAddTrusted.Click += new System.EventHandler(this.btnAddTrusted_Click);
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//
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// cbPerformRevocationCheck
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//
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this.cbPerformRevocationCheck.AutoSize = true;
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this.cbPerformRevocationCheck.Location = new System.Drawing.Point(411, 29);
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this.cbPerformRevocationCheck.Name = "cbPerformRevocationCheck";
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this.cbPerformRevocationCheck.Size = new System.Drawing.Size(148, 17);
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this.cbPerformRevocationCheck.TabIndex = 40;
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this.cbPerformRevocationCheck.Text = "Perform revocation check";
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//
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// groupBox2
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//
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this.groupBox2.Controls.Add(this.lvKnownCertificates);
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this.groupBox2.Controls.Add(this.btnRemoveKnown);
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this.groupBox2.Controls.Add(this.bthAddKnown);
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this.groupBox2.Location = new System.Drawing.Point(5, 60);
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this.groupBox2.Name = "groupBox2";
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this.groupBox2.Size = new System.Drawing.Size(350, 95);
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this.groupBox2.TabIndex = 16;
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this.groupBox2.TabStop = false;
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this.groupBox2.Text = "Known Certificates";
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//
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// lvKnownCertificates
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//
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this.lvKnownCertificates.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
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this.columnHeader1,
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this.columnHeader2});
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this.lvKnownCertificates.HideSelection = false;
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this.lvKnownCertificates.Location = new System.Drawing.Point(5, 20);
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this.lvKnownCertificates.Name = "lvKnownCertificates";
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this.lvKnownCertificates.Size = new System.Drawing.Size(260, 70);
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this.lvKnownCertificates.TabIndex = 4;
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this.lvKnownCertificates.UseCompatibleStateImageBehavior = false;
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this.lvKnownCertificates.View = System.Windows.Forms.View.Details;
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//
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// columnHeader1
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//
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this.columnHeader1.Text = "Serial";
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this.columnHeader1.Width = 90;
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//
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// columnHeader2
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//
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this.columnHeader2.Text = "Issuer";
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this.columnHeader2.Width = 160;
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//
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// btnRemoveKnown
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//
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this.btnRemoveKnown.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
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this.btnRemoveKnown.Location = new System.Drawing.Point(270, 51);
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this.btnRemoveKnown.Name = "btnRemoveKnown";
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this.btnRemoveKnown.Size = new System.Drawing.Size(75, 25);
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this.btnRemoveKnown.TabIndex = 3;
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this.btnRemoveKnown.Text = "Remove";
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this.btnRemoveKnown.Click += new System.EventHandler(this.btnRemoveKnown_Click);
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//
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// bthAddKnown
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//
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this.bthAddKnown.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
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this.bthAddKnown.Location = new System.Drawing.Point(270, 20);
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this.bthAddKnown.Name = "bthAddKnown";
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this.bthAddKnown.Size = new System.Drawing.Size(75, 25);
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this.bthAddKnown.TabIndex = 2;
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this.bthAddKnown.Text = "Add";
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this.bthAddKnown.Click += new System.EventHandler(this.bthAddKnown_Click);
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//
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// cbIgnoreChainValidationErrors
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//
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this.cbIgnoreChainValidationErrors.AutoSize = true;
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this.cbIgnoreChainValidationErrors.Location = new System.Drawing.Point(10, 29);
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this.cbIgnoreChainValidationErrors.Name = "cbIgnoreChainValidationErrors";
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this.cbIgnoreChainValidationErrors.Size = new System.Drawing.Size(162, 17);
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this.cbIgnoreChainValidationErrors.TabIndex = 41;
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this.cbIgnoreChainValidationErrors.Text = "Ignore chain validation errors";
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//
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// cbForceCompleteChainValidation
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//
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this.cbForceCompleteChainValidation.AutoSize = true;
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this.cbForceCompleteChainValidation.Location = new System.Drawing.Point(208, 29);
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this.cbForceCompleteChainValidation.Name = "cbForceCompleteChainValidation";
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this.cbForceCompleteChainValidation.Size = new System.Drawing.Size(176, 17);
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this.cbForceCompleteChainValidation.TabIndex = 43;
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this.cbForceCompleteChainValidation.Text = "Force complete chain validation";
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//
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// openDialogCert
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//
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this.openDialogCert.Filter = "PKCS#12 files (*.pfx)|*.pfx|All files (*.*)|*.*";
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this.openDialogCert.InitialDirectory = ".";
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this.openDialogCert.Title = "Please select a certificate to decrypt the document";
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//
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// cbOfflineMode
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//
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this.cbOfflineMode.AutoSize = true;
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this.cbOfflineMode.Location = new System.Drawing.Point(584, 29);
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this.cbOfflineMode.Name = "cbOfflineMode";
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this.cbOfflineMode.Size = new System.Drawing.Size(86, 17);
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this.cbOfflineMode.TabIndex = 50;
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this.cbOfflineMode.Text = "Offline Mode";
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//
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// frmMain
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//
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this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
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this.ClientSize = new System.Drawing.Size(734, 331);
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this.Controls.Add(this.groupBox4);
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this.Controls.Add(this.label5);
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this.Controls.Add(this.cbDetached);
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this.Controls.Add(this.edDataFile);
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this.Controls.Add(this.sbBrowseDataFile);
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this.Controls.Add(this.lDataFile);
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this.Controls.Add(this.edInputFile);
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this.Controls.Add(this.btnVerify);
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this.Controls.Add(this.sbBrowseInputFile);
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this.Controls.Add(this.lbInputFile);
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this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
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this.MaximizeBox = false;
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this.Name = "frmMain";
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this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
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this.Text = "CAdES Verifier Demo";
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this.groupBox4.ResumeLayout(false);
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this.groupBox4.PerformLayout();
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this.groupBox3.ResumeLayout(false);
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this.groupBox2.ResumeLayout(false);
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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 frmMain());
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}
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private void sbBrowseXMLFile_Click(object sender, System.EventArgs e)
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{
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dlgOpen.InitialDirectory = Application.StartupPath;
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dlgOpen.FileName = edInputFile.Text;
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if (dlgOpen.ShowDialog() == DialogResult.OK)
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edInputFile.Text = dlgOpen.FileName;
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}
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private void btnVerify_Click(object sender, EventArgs e)
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{
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try
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{
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verifier.InputFile = edInputFile.Text;
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if (cbPerformRevocationCheck.Checked)
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{
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verifier.RevocationCheck = CAdESVerifierRevocationChecks.crcAuto;
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}
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else
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{
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verifier.RevocationCheck = CAdESVerifierRevocationChecks.crcNone;
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}
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verifier.IgnoreChainValidationErrors = cbIgnoreChainValidationErrors.Checked;
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if (cbForceCompleteChainValidation.Checked)
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verifier.Config("ForceCompleteChainValidation=true");
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else
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verifier.Config("ForceCompleteChainValidation=false");
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verifier.OfflineMode = cbOfflineMode.Checked;
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verifier.Detached = cbDetached.Checked;
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if (cbDetached.Checked)
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{
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verifier.DataFile = edDataFile.Text;
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}
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else
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{
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verifier.OutputFile = edDataFile.Text;
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}
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verifier.Verify();
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switch (verifier.Signatures[0].SignatureValidationResult)
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{
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case SignatureValidities.svtSignerNotFound:
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{
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MessageBox.Show("Signer not found", "", MessageBoxButtons.OK, MessageBoxIcon.Error);
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break;
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}
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case SignatureValidities.svtFailure:
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{
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MessageBox.Show("Signature verification failed", "", MessageBoxButtons.OK, MessageBoxIcon.Error);
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break;
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}
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case SignatureValidities.svtCorrupted:
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{
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MessageBox.Show("Signature is invalid", "", MessageBoxButtons.OK, MessageBoxIcon.Error);
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break;
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}
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default:
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{
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MessageBox.Show("Signature validated successfully", "", MessageBoxButtons.OK, MessageBoxIcon.Information);
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break;
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}
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}
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}
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catch (Exception ex)
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{
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MessageBox.Show(ex.Message);
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}
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}
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private void cbDetached_CheckedChanged(object sender, EventArgs e)
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{
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if (cbDetached.Checked)
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{
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lDataFile.Text = "Data file:";
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}
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else
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{
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lDataFile.Text = "Output file:";
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}
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}
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private void sbBrowseDataFile_Click(object sender, EventArgs e)
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{
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if (cbDetached.Checked)
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{
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dlgOpen.FileName = edDataFile.Text;
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if (dlgOpen.ShowDialog() == DialogResult.OK)
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edDataFile.Text = dlgOpen.FileName;
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}
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else
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{
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dlgSave.FileName = edDataFile.Text;
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if (dlgSave.ShowDialog() == DialogResult.OK)
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edDataFile.Text = dlgSave.FileName;
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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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}
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return cert;
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}
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private string RequestPassword()
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{
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frmRequestPassword dlg = new frmRequestPassword();
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string s = "";
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if (dlg.ShowDialog() == DialogResult.OK)
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{
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s = dlg.tbInput.Text;
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}
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dlg.Dispose();
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return s;
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}
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public void UpdateKnownCertificates()
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{
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lvKnownCertificates.BeginUpdate();
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lvKnownCertificates.Items.Clear();
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for (int i = 0; i < verifier.KnownCertificates.Count; i++)
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{
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string s = verifier.KnownCertificates[i].Issuer;
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if (s == "")
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s = "<unknown>";
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ListViewItem Item = lvKnownCertificates.Items.Add(BitConverter.ToString(verifier.KnownCertificates[i].SerialNumber));
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Item.SubItems.Add(s);
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}
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lvKnownCertificates.EndUpdate();
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}
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public void UpdateTrustedCertificates()
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{
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lvTrustedCertificates.BeginUpdate();
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lvTrustedCertificates.Items.Clear();
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for (int i = 0; i < verifier.TrustedCertificates.Count; i++)
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{
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string s = verifier.TrustedCertificates[i].Issuer;
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if (s == "")
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s = "<unknown>";
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ListViewItem Item = lvTrustedCertificates.Items.Add(BitConverter.ToString(verifier.TrustedCertificates[i].SerialNumber));
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Item.SubItems.Add(s);
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}
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lvTrustedCertificates.EndUpdate();
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}
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private void bthAddKnown_Click(object sender, EventArgs e)
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{
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openDialogCert.Title = "Select certificate file";
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openDialogCert.Filter = "PEM-encoded certificate (*.pem)|*.PEM|DER-encoded certificate (*.cer)|*.CER|PFX-encoded certificate (*.pfx)|*.PFX";
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if (openDialogCert.ShowDialog() == DialogResult.OK)
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{
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Certificate cert = LoadCertificate(openDialogCert.FileName, RequestPassword());
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verifier.KnownCertificates.Add(cert);
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UpdateKnownCertificates();
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}
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}
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private void btnRemoveKnown_Click(object sender, EventArgs e)
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{
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if (lvKnownCertificates.SelectedItems.Count > 0)
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{
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verifier.KnownCertificates.RemoveAt(lvKnownCertificates.SelectedItems[0].Index);
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UpdateKnownCertificates();
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}
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}
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private void btnAddTrusted_Click(object sender, EventArgs e)
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{
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openDialogCert.Title = "Select certificate file";
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openDialogCert.Filter = "PEM-encoded certificate (*.pem)|*.PEM|DER-encoded certificate (*.cer)|*.CER|PFX-encoded certificate (*.pfx)|*.PFX";
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if (openDialogCert.ShowDialog() == DialogResult.OK)
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{
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Certificate cert = LoadCertificate(openDialogCert.FileName, RequestPassword());
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verifier.TrustedCertificates.Add(cert);
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UpdateTrustedCertificates();
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}
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}
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private void btnRemoveTrusted_Click(object sender, EventArgs e)
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{
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if (lvTrustedCertificates.SelectedItems.Count > 0)
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{
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verifier.TrustedCertificates.RemoveAt(lvTrustedCertificates.SelectedItems[0].Index);
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UpdateTrustedCertificates();
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}
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}
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}
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}
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