c# - C# での Apple Passbook のコンテンツへの署名

Question

これが私のコードです

static void Main(string[] args)
    {
        try
        {
            ContentInfo contentInfo = new ContentInfo(File.ReadAllBytes(@"D:\prj\temp\manifest.json"));
            SignedCms signedCms = new SignedCms(SubjectIdentifierType.IssuerAndSerialNumber, contentInfo);
            var signer = new CmsSigner(new X509Certificate2(@"D:\prj\temp\Shooger_Passbook_withoutKey.p12", "xxxxxxxxx"));
            signer.Certificates.Add(new X509Certificate2(@"D:\prj\temp\AppleIncRootCertificate.cer"));
            signer.Certificates.Add(new X509Certificate2(@"D:\prj\temp\AppleWWDRCA.cer"));
            signer.IncludeOption = X509IncludeOption.WholeChain;
            signer.SignedAttributes.Add(new Pkcs9SigningTime());
            signedCms.ComputeSignature(signer, false);

            byte[] myCmsMessage = signedCms.Encode();
            File.WriteAllBytes(@"D:\prj\temp\signature", myCmsMessage);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.ToString());
        }
    }

「内部証明書チェーンエラーが発生しました。」がスローされる理由を誰か教えてもらえますか?