11

我需要让我的应用程序的用户使用他们的个人 USB 安全令牌签署他们的批准。

我已经成功地签署了数据，但我无法获得有关谁的令牌已用于这样做的信息。

这是我到目前为止的代码：

CspParameters csp = new CspParameters(1, "SafeNet RSA CSP");
csp.Flags = CspProviderFlags.UseDefaultKeyContainer;            
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(csp);
// Create some data to sign. 
byte[] data = new byte[] { 0, 1, 2, 3, 4, 5, 6, 7 };
Console.WriteLine("Data         : " + BitConverter.ToString(data));
// Sign the data using the Smart Card CryptoGraphic Provider.            
byte[] sig = rsa.SignData(data, "SHA1");            
Console.WriteLine("Signature    : " + BitConverter.ToString(sig));

令牌信息中有一个字段称为“令牌名称”。如何访问该字段以验证已使用哪个令牌签署批准？

在此处输入图像描述

附加信息和更新：

  • “令牌名称”始终匹配所有者的名称（拥有 USB 令牌的用户）
  • 似乎无法完成，也许有一个网络服务或我需要调用的东西才能直接从证书颁发机构获取信息。
4

1 回答 1

8

当我最初提出这个问题时，我对数字证书的理解非常基础，所以这个问题没有被正确地提出。现在我知道我需要从智能卡设备访问证书，查询其属性并测试用户是否可以为其输入正确的 PIN。

这是我以前这样做的代码：

//Prompt the user with the list of certificates on the local store.
//The user have to select the certificate he wants to use for signing.
//Note: All certificates form the USB device are automatically copied to the local store as soon the device is plugged in.
X509Store store = new X509Store(StoreLocation.CurrentUser);
store.Open(OpenFlags.ReadOnly);
X509CertificateCollection certificates = X509Certificate2UI.SelectFromCollection(store.Certificates,
                                                                                "Certificados conocidos",
                                                                                "Por favor seleccione el certificado con el cual desea firmar",
                                                                                X509SelectionFlag.SingleSelection
                                                                                );
store.Close();
X509Certificate2 certificate = null;
if (certificates.Count != 0)
{
    //The selected certificate
    certificate = (X509Certificate2)certificates[0];
}
else
{
    //The user didn't select a certificate
    return "El usuario canceló la selección de un certificado";
}
//Check certificate's atributes to identify the type of certificate (censored)
if (certificate.Issuer != "CN=............................., OU=................., O=..., C=US")
{
    //The selected certificate is not of the needed type
    return "El certificado seleccionado no corresponde a un token ...";
}
//Check if the certificate is issued to the current user
if (!certificate.Subject.ToUpper().Contains(("E=" + pUserADLogin + "@censoreddomain.com").ToUpper()))
{
    return "El certificado seleccionado no corresponde al usuario actual";
}
//Check if the token is currently plugged in
XmlDocument xmlDoc = new XmlDocument();
XmlElement element = xmlDoc.CreateElement("Content", SignedXml.XmlDsigNamespaceUrl.ToString());
element.InnerText = "comodin";
xmlDoc.AppendChild(element);
SignedXml signedXml = new SignedXml();
try
{
    signedXml.SigningKey = certificate.PrivateKey;
}
catch
{
    //USB Token is not plugged in
    return "El token no se encuentra conectado al equipo";
}
DataObject dataObject = new DataObject();
dataObject.Data = xmlDoc.ChildNodes;
dataObject.Id = "CONTENT";
signedXml.AddObject(dataObject);
Reference reference = new Reference();
reference.Uri = "#CONTENT";
signedXml.AddReference(reference);
//Attempt to sign the data. The user will be prompted to enter his PIN
try
{
    signedXml.ComputeSignature();
}
catch
{
    //User didn't enter the correct PIN
    return "Hubo un error confirmando la identidad del usuario";
}
//The user has signed with the correct token
return String.Format("El usuario {0} ha firmado exitosamente usando el token con serial {1}", pUserADLogin, certificate.SerialNumber);

资料来源：

http://stormimon.developpez.com/dotnet/signature-electronique/（法语） https://www.simple-talk.com/content/print.aspx?article=1713（英文）

于 2013-03-05T20:27:19.287 回答