Question

我正在尝试在MakeSignature.SignExternalContainer中添加公钥字符串但是有错误，

的字符串sing_test =＆＃34; 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 + ySbGqJtUd9xbhlQIDAQABo4IBHTCCARkwEQYDVR0OBAoECEwFNGCDXdKgMIG7BgNVHSAEgbMwgbAwga0GB2CCZGQCBAIwgaEwQQYIKwYBBQUHAgEWNWh0dHBzOi8vbnNkbC5lZ292LWNhLmNvLmluL3JlcG9zaXRvcnkvbnNkbGVnb3ZjcHMucGRmMFwGCCsGAQUFBwICMFAaTkFhZGhhYXIgZS1LWUMtQmlvbWV0cmljIENsYXNzIENlcnRpZmljYXRlIElzc3VlZCBieSBOU0RMIGUtR292IElzc3VpbmcgQ0EgVGVzdDAhBgNVHREEGjAYgRZtYW5pc2hiZW5kcmVAZ21haWwuY29tMBMGA1UdIwQMMAqACEBuFJI2LqIcMA4GA1UdDwEB / wQEAwIGwDANBgkqhkiG9w0BAQsFAAOCAQEADbuOkgWKquflIrqDsB93L5aa + VxjFHvB914UD IllO4MYTo / UVgDN2iANiJ2HOjFkY0VhdnuJKp0cjDSywP6mTXs0VUf70DEL5sZpjfnoJK ++ Eb6FlDHHMKflMkG / ja3b6FWK1W / 1L0 / yjYpjl4E2Uu5tq0T3k4ZOPd / LBD3OeudKZM1IPaT95Zd8JRqwz6LsyYx1SvXqLtrRUb8eIauvAJ92prvovxusvupzolB3AOCkwEr6jqGXOiwssEnqUCuUd3CVXWUxL5TzWW9oCPIDAKbUyyVWtntorVFfKmzvWDCV42jkHrf9J1snbr4DyjNhkOSQr6cDZfg0uK2gKWfBcA ==＆＃34 ;;

byte[] rawData = System.Convert.FromBase64String(sing_test );

    public static byte[] GetBytesToSign(string unsignedPdf, string tempPdf, string signatureFieldName)
    {
        using (PdfReader reader = new PdfReader(unsignedPdf))
        {
            using (FileStream os = File.OpenWrite(tempPdf))
            {
                PdfStamper stamper = PdfStamper.CreateSignature(reader, os, '\0');
                PdfSignatureAppearance appearance = stamper.SignatureAppearance;
                appearance.SetVisibleSignature(new iTextSharp.text.Rectangle(36, 748, 144, 780), 1, signatureFieldName);
                IExternalSignatureContainer external = new ExternalBlankSignatureContainer(PdfName.ADOBE_PPKMS, PdfName.ADBE_PKCS7_SHA1);
                MakeSignature.SignExternalContainer(appearance, external, 8192);
                stamper.Close();
                return SHA1Managed.Create().ComputeHash(appearance.GetRangeStream());
            }
        }
    }

public static void EmbedSignature(string tempPdf, string signedPdf, string signatureFieldName, byte[] signedBytes)
{
    using (PdfReader reader = new PdfReader(tempPdf))
    {
        using (FileStream os = File.OpenWrite(signedPdf))
        {
            PdfStamper st = PdfStamper.CreateSignature(reader, os, '\0', null, true);               
            PdfSignatureAppearance sap = st.SignatureAppearance;
            sap.Reason = "Testing";
            sap.Location = "Test";
            sap.SetVisibleSignature(new iTextSharp.text.Rectangle(250, 50, 50, 100), 1, null);
            IExternalSignatureContainer external = new MyExternalSignatureContainer(signedBytes);
            try
            {
               MakeSignature.SignExternalContainer(sap, external, 8192);
            }
            catch (Exception ex) {  }
            st.Close();
        }
    }
}

private class MyExternalSignatureContainer : IExternalSignatureContainer
{
    private readonly byte[] signedBytes;

    public MyExternalSignatureContainer(byte[] signedBytes)
    {
        this.signedBytes = signedBytes;
    }

    public byte[] Sign(Stream data)
    {
        return signedBytes;
    }

    public void ModifySigningDictionary(PdfDictionary signDic)
    {
    }
}

得到错误.. 签名验证期间出错。 BER解码时遇到错误：

...谢谢

如何使用iTextSharp和c＃

0 个答案: