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using System;
using System.Text;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
namespace WebApplication4
{
public partial class _Default : System.Web.UI.Page
{
static char[] hexDigits = {
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
public static string ToHexString(byte[] bytes)
{
char[] chars = new char[bytes.Length * 2];
for (int i = 0; i < bytes.Length; i++)
{
int b = bytes[i];
chars[i * 2] = hexDigits[b >> 4];
chars[i * 2 + 1] = hexDigits[b & 0xF];
}
return new string(chars);
}
protected void btnSignature_Click(object sender, EventArgs e)
{
X509Store store = new X509Store(StoreName.My, StoreLocation.CurrentUser);
store.Open(OpenFlags.OpenExistingOnly);
X509Certificate2Collection certificates = store.Certificates;
int a = certificates.Count;
lbCertCount.Text = System.Convert.ToString(a);
if (a > 0)
{
X509Certificate2 certificate = certificates[1];
string publicKey = certificate.GetPublicKeyString();
lbMypublicKey.Text = publicKey + "<br/>";
// AsymmetricAlgorithm privateKey = certificate.PrivateKey;
RSACryptoServiceProvider privateKey = certificate.PrivateKey as RSACryptoServiceProvider;
// message simple bonjour
byte[] buffer = Encoding.Default.GetBytes("Bonjour");
byte[] signature = privateKey.SignData(buffer, new SHA1Managed());
string me = ToHexString(signature);
lbSignature.Text = me;
RSACryptoServiceProvider publicKey1 = certificate.PublicKey.Key as RSACryptoServiceProvider;
bool verify = publicKey1.VerifyData(buffer, new SHA1Managed(), signature);
if (verify == true)
{
lbControl.Text = "Signature valide";
}
else
{
lbControl.Text = "Signature non Valide";
}
}
}
}
} |
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