C# SignedCms.ComputeSignature抛出“；对象标识符的格式不正确"；

最近开始抛出此异常，代码运行正常：

public byte[] Sign(CmsMessage cmsMessage, CspKeyInfo keyInfo)
{
    ContentInfo contentInfo = new ContentInfo(new Oid(cmsMessage.ContentTypeOid), cmsMessage.Content);

    var cspObj = new CspParameters()
    {
        ProviderName = keyInfo.ProviderName,
        ProviderType = keyInfo.ProviderType,
        KeyNumber = (int)KeyNumber.Signature,
        Flags = CspProviderFlags.UseExistingKey,
        KeyContainerName = keyInfo.ContainerName
    };
    var signer = new CmsSigner(cspObj)
    {
        DigestAlgorithm = new Oid(cmsMessage.SignerHashAlgorithmOid)
    };

    signer.SignedAttributes.Add(new Pkcs9SigningTime());

    var signedCms = new SignedCms(contentInfo, cmsMessage.Detached);
    signedCms.ComputeSignature(signer);
    var encodeByteBlock = (ByteBlock)signedCms.Encode();
    return encodeByteBlock;
}

signer

的

SignerIdentifierType

是

SubjectKeyIdentifier

但它在

ComputeSignature

对象标识符的格式不正确

虚拟证书具有私钥（

HasPrivateKey

为

true

）