PKCS#11Interop.X509Store 找不到私钥

Question

Pkcs11X509Certificate 无法在某些令牌中找到私钥。

Pkcs11X509Certificate.GetRSAPrivateKey() 产生空值。然后，当我运行 SignedXml.ComputeSignature() 时，我收到以下错误：

System.Security.Cryptography.CryptographicException: '未加载签名密钥。'

Answer 1

将以下代码（概念证明）添加到 Pkcs11X509Certificate.FindKey 可以正常工作。 基本上我从搜索模板属性中删除了 CKA.CKA_LABEL 并找到了证书私钥。

// Contrary to what PKCS#11 specification suggests, subject of the private key is not readable even after login.
// So if we cannot find private key with subject, we will search for private keys without subject. 
if (keyHandle == null)
{
    searchTemplate = new List<IObjectAttribute>()
    {
        session.Factories.ObjectAttributeFactory.Create(CKA.CKA_CLASS, keyClass),
        session.Factories.ObjectAttributeFactory.Create(CKA.CKA_TOKEN, true),
        session.Factories.ObjectAttributeFactory.Create(CKA.CKA_ID, ckaId),
        //session.Factories.ObjectAttributeFactory.Create(CKA.CKA_LABEL, ckaLabel),
    };

    foreach (IObjectHandle foundObjectHandle in session.FindAllObjects(searchTemplate))
    {
        keyHandle = foundObjectHandle;
        break;
    }
}