I'm facing a new situation involving a program, written in .NET Framework 4.0/C#, which has to encode/decode and sign messages to be sent/received in a particular kind of WAN. This is the current scenario, which is working fine. We have a .p12 file (which contains the sender certificate) and a .cer file (which contains the receiver certificate), which are both installed in the pc. The scenario is working using SHA1 and PKCS#7 at 1024 bit, so the following piece of code works:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography.X509Certificates;
using System.Security.Cryptography.Pkcs;
using System.Security.Cryptography;
using System.Windows;
using System.Windows.Controls;
using System.Collections;
private static string senderCert = "sendername"; //the name registered in .p12 file
private static string receiverCert = "receivername"; //the name registered in .cer file
/// ///verify that the receiving message is signed
///and returns the data without sign
///
/// dataflow with sign
///
public static byte[] Verify(this byte[] signedData)
{
X509Certificate2 certPub = GetReceiverCert();
if (certPub == null) return null;

    ContentInfo decodeContentInfo = new ContentInfo(signedData);
    SignedCms decodeCMS = new SignedCms(decodeContentInfo, false);

    try
    {
        //decode the message, if it isn't signed, raise an exception
        decodeCMS.Decode(signedData);
        SignerInfo signerInfo = decodeCMS.SignerInfos\[0\];

        X509Certificate2Collection certCollection = new 
                    X509Certificate2Collection(certPub);                
        return decodeCMS.ContentInfo.Content;
    }
    catch (CryptographicException err)
    {
        Logger.Log(err);
        return null;
    }
}

/// /// Returns the certificate used to sign the sending messages
/// 
/// 
private static X509Certificate2 GetSenderCert()
{
    //Open the personal certificates folder
    X509Store storeMy = new X509Store(StoreName.My, StoreLocation.CurrentUser);
    storeMy.Open(OpenFlags.ReadOnly);

    //find the proper certificate
    X509Certificate2Collection certColl = storeMy.Certificates.Find 
    (X509FindType.

Thanks a lot, I made the changes and now the running is quite good! Bye Nino Look Torino 2006 - - - - - FORZA ITALIA!!!

HumanOsc wrote:

1.) You can use the SelectedIndex Property to check if an item is selected... if(listView.SelectedIndex == -1) return;

I don't have the definition SelectedIndex inside ListView. ('System.Windows.Forms.ListView' does not contain a definition for 'SelectedIndex')... I use VS .Net 2003 with CF 1.0. I used this code, but I'm not sure if it has the same effect... if (listViewCatalogo.SelectedIndices[0] == -1) return; Another question. In which point of the program should I use this code? Inside the definition of listViewCatalogo_SelectedIndexChanged event? When I deploy I have the same errors. If I declare the control inside or outside the while clause I have this message: Error: index (I mean, the variable passed to the last testing form(FormProdotto).

sorry, it was my first message and it was very important for me, I'll remember for the next time! thank you

Hi to all. I have a problem with my thesis. I'm realizing an application with VS .Net 2003 for PDA in C#. I have a catalog stored into the PDA and I want to navigate into it. I've builded a database which consists of 4 important tables: three categories tables (First, Second and Third) and the "Products" table. I use a ListView object to navigate inside the categories. The code is this (I bolded the important part): using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data.SqlServerCe; using System.Data.SqlClient; using System.Data; using System.Reflection; using System.IO; namespace SmartDeviceApplication3 { /// /// Form per sfogliare il catalogo - Form to navigate inside the catalog /// public class FormSfogliaCatalogo : System.Windows.Forms.Form { private System.Windows.Forms.Panel panel1; private System.Windows.Forms.Label label8; private System.Windows.Forms.Label label7; private System.Windows.Forms.Label label6; private System.Windows.Forms.Label label5; private System.Windows.Forms.PictureBox pictureBox3; private System.Windows.Forms.PictureBox pictureBox2; private System.Windows.Forms.PictureBox pictureBox1; private System.Windows.Forms.PictureBox pictureBox4; private System.Windows.Forms.MainMenu mainMenu1; private System.Windows.Forms.ListView listViewCatalogo; public FormSfogliaCatalogo() { // // Required for Windows Form Designer support // InitializeComponent(); listViewCatalogo.Activation = ItemActivation.OneClick; listViewCatalogo.View = System.Windows.Forms.View.SmallIcon; //Declare the connection variable SqlCeConnection sqlConn1 = new SqlCeConnection(); try { // Open a connection to the database sqlConn1.ConnectionString = "Data Source =\\My Documents\\db.sdf"; sqlConn1.Open(); SqlCeCommand searchCommand = new SqlCeCommand(); searchCommand.Connection = sqlConn1; searchCommand.CommandText = "SELECT * FROM TIPOLOGIA_PRIMARIA"; // it means select * from first category // Execute and return the rows in the data reader object SqlCeDataReader dR; dR = searchCommand.ExecuteReader(CommandBehavior.CloseConnection); int nFields = dR.FieldCount; // Setup the columns in the listview using the fields in the table listViewCatalogo.Clear(); listViewCatalogo.Columns.Add("Categoria", -1, HorizontalAlignment.Left); // Fill the rows in the l