C#对Java的SHA256withRSA的验签问题

Question

现在我对java平台返回的签名验签无法通过。下面是我的验签方法，这样的写法是不是错的？正确的验签应该是怎样的？麻烦指导一下。

X509Certificate2 signerCert = new X509Certificate2(".cer的路径");
            byte[] DeFormaterSingature = Convert.FromBase64String("平台返回的签名值");
            var key = (RSACryptoServiceProvider)signerCert.PublicKey.Key;
            var rt= key.VerifyData(System.Text.Encoding.UTF8.GetBytes("待签名数据"), CryptoConfig.MapNameToOID("SHA256"), DeFormaterSingature);

Answer 1

//验签方法
public bool Verifycer(string content, string signedString)
{
try
{
this.cfg = Utils.loadCfg_hz();
string merCertFile1 = XXXXX;//证书地址
X509Certificate2 signerCert = new X509Certificate2( merCertFile1);
SignedCms sign = new SignedCms(new ContentInfo(
Encoding.UTF8.GetBytes(content)), true);
sign.Decode(Convert.FromBase64String(signedString));
sign.CheckSignature(new X509Certificate2Collection(signerCert), true);
return true;

    }
    catch (Exception ex)
    {
        return false;
    }
}