如何使用 C# 从安全令牌中获取信息

Question

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被用于这样做的信息。

这是我目前的代码：

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？

其他信息和更新：

• “令牌名称”总是匹配所有者的名称（拥有 USB 的用户 令牌）
• 好像不行，可能有网络服务或者 我需要打电话才能直接获取信息 来自证书颁发机构。

Answer 1

当我最初问这个问题时，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问出来。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);

来源：

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