使用ITextSharp和XML签名对Pdf进行签名

我试图使用远程web服务来唱pdf,该服务返回一个XML签名,该签名由 PKCS#1

deferred asynchronously .

PKCS#7

添加空签名字段并获取Pdf可签名字节的代码

public static string GetBytesToSign(string unsignedPdf, string tempPdf, string signatureFieldName)
{
    if (File.Exists(tempPdf))
        File.Delete(tempPdf);

    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 Rectangle(36, 748, 250, 400), 1, signatureFieldName);

            IExternalSignatureContainer external = new ExternalBlankSignatureContainer(PdfName.ADOBE_PPKLITE, PdfName.ADBE_PKCS7_DETACHED);

            MakeSignature.SignExternalContainer(appearance, external, 8192);

            byte[] array = SHA256Managed.Create().ComputeHash(appearance.GetRangeStream());

            return Convert.ToBase64String(array);
        }
    }
}

打开临时Pdf并嵌入接收到的签名的代码

public static void EmbedSignature(string tempPdf, string signedPdf, string signatureFieldName, string signature)
{
    byte[] signedBytes = Convert.FromBase64String(signature);

    using (PdfReader reader = new PdfReader(tempPdf))
    {
        using (FileStream os = File.OpenWrite(signedPdf))
        {
            IExternalSignatureContainer external = new MyExternalSignatureContainer(signedBytes);
            MakeSignature.SignDeferred(reader, signatureFieldName, os, external);
        }
    }
}

<SignatureValue Id="Signature-xxx-SIG">
RMFbYIigsrjYQEc4PCoHMMg8vwz/hYrCjj0IR+835BZZ/TsTMHZhMVnu2KQZi1UL
dWMeuhTxagBmjdBSzGiy1OEdH5r0FM77Of4Zz99o/aAhYqr3qpOETGgNn9GHlphL
5FSPYbNsq2rDHA8FsNdqNdb6qJUZYsfYvuhJaUMstBXeL/dLIT46t7ySCQ7CGjE5
mpD1AG8M+TVWf4ut5tucZuZV9PMQB3tyoarQD5RoUv872RzB5IorcIhLnf+O6E6o
EF0HuGitRhN9bbPgdLaUma5MNjKCaeQTpCXp3KXwi8VoQGd5fpUBZbAKtMpKeCts
RAOk1O4uk/4poic4IGPhDw==
</SignatureValue>
<KeyInfo>

<KeyValue>
<RSAKeyValue>

<Modulus>
AI5T0zOBBD4i7Cb1v8wDL0+By8i1h2U0HDFQ73/iNBkM9Gd7mUU0i2A9wJTeiktS
IeBU/JLzqVp7vK857dZlrlT9qiH2cNQufh+q2MpNk7wtPcDACVedVkBUNkIgoXBy
g4cGmAYoWBsD2zDXiZXukStjUWws+/xCU0hADIelFONr141zRHindfq86QrDTC7q
bHBtDT7dJckWzaDPHf3Xlej+U/A1x/8kd504VZaFQfAPYBOgGPY918G1HjBtlajR
nyrl10LuV708IHZtAmKmEfdZOeq//9OGZZLh2nJ86b5Fa6XPFhxzLx/ugBS/8GHt
iVYeJOlfHXRl5w2k2Vv/ssU=
</Modulus>

<Exponent>AQAB</Exponent>

</RSAKeyValue>
</KeyValue>

<X509Data>
<X509Certificate>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</X509Certificate>
</X509Data>

</KeyInfo>

当我使用返回的 PKCS#1 .

自 BlankSignatureContainer ADBE_PKCS7_DETACHED PKCS#1 ? 或者我应该/可以创建 PKCS#7 来自的消息 和用户证书,并使用此格式代替?

我还可以在请求签名之前检索最终用户证书。

<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope">
   <soap:Body>
      <ns1:MSS_ProfileQueryResponse xmlns:ns1="/mobilesignature/validation/soap">
         <MSS_ProfileResp MinorVersion="1" MajorVersion="1" xmlns:ns2="http://www.w3.org/2000/09/xmldsig#" xmlns:ns3="http://www.w3.org/2001/04/xmlenc#" xmlns:ns4="http://www.w3.org/2003/05/soap-envelope" xmlns:ns5="http://uri.etsi.org/TS102204/v1.1.2#">
            <ns5:AP_Info Instant="2017-09-16T04:54:43.260Z" AP_PWD="turkcell123" AP_TransID="_1371012883260" AP_ID="http://turkcell.com.tr"/>
            <ns5:MSSP_Info Instant="2017-09-16T13:33:36.316+02:00">
               <ns5:MSSP_ID/>
            </ns5:MSSP_Info>
            <ns5:SignatureProfile>
               <ns5:mssURI>http://MobileSignature/profile2</ns5:mssURI>
               <ns5:CertIssuerDN> Mobil NES Hizmet Saglayicisi S2</ns5:CertIssuerDN>
               <ns5:CertSerialNumber>71408272140747005781907792964830346324</ns5:CertSerialNumber>
               <ns5:CertHash>
                  <ns5:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
                  <ns5:DigestValue>e1yKlaPIU95phxxYvrUsmSQDpKqKU60/b+a8BLw1wNM=</ns5:DigestValue>
               </ns5:CertHash>
               <ns5:msspUrl>http://localhost</ns5:msspUrl>
               <ns5:certIssuerDN-DER>MG8xCzAJBgNVBAYTAlRSMSgwJgYDVQQKDB9FbGVrdHJvbmlrIEJpbGdpIEd1dmVubGlnaSBBLlMuMTYwNAYDVQQDDC1URVNUIFR1cmtjZWxsIE1vYmlsIE5FUyBIaXptZXQgU2FnbGF5aWNpc2kgUzI=</ns5:certIssuerDN-DER>
            </ns5:SignatureProfile>
            <ns5:Status>
               <ns5:StatusCode Value="100"/>
               <ns5:StatusMessage>REQUEST_OK</ns5:StatusMessage>
            </ns5:Status>
         </MSS_ProfileResp>
      </ns1:MSS_ProfileQueryResponse>
   </soap:Body>
</soap:Envelope>

public static byte[] GetBytesToSign(string unsignedPdf, string tempPdf, string signatureFieldName, byte[] x509Signature)
{
    if (File.Exists(tempPdf))
        File.Delete(tempPdf);

    var chain = new List<Org.BouncyCastle.X509.X509Certificate>
    {
        Org.BouncyCastle.Security.DotNetUtilities.FromX509Certificate(new X509Certificate2(x509Signature))
    };

    Org.BouncyCastle.X509.X509Certificate certificate = chain.ElementAt(0);

    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 Rectangle(36, 748, 250, 400), 1, signatureFieldName);

            appearance.Certificate = chain[0];

            IExternalSignatureContainer external = new ExternalBlankSignatureContainer(PdfName.ADOBE_PPKLITE, PdfName.ADBE_PKCS7_DETACHED);

            MakeSignature.SignExternalContainer(appearance, external, 8192);

            Stream data = appearance.GetRangeStream();

            byte[] hash = DigestAlgorithms.Digest(data, "SHA256");

            var signature = new PdfPKCS7(null, chain, "SHA256", false);

            byte[] signatureHash = signature.getAuthenticatedAttributeBytes(hash, null, null, CryptoStandard.CMS);

            _signature = signature;
            _apperance = appearance;
            _hash = hash;
            _signatureHash = signatureHash;

            return signatureHash;
        }
    }
}

public static void EmbedSignature(string tempPdf, string signedPdf, string signatureFieldName, byte[] signedBytes)
{
    using (PdfReader reader = new PdfReader(tempPdf))
    {
        using (FileStream os = File.OpenWrite(signedPdf))
        {
            _signature.SetExternalDigest(signedBytes, null, "RSA");

            byte[] encodedSignature = _signature.GetEncodedPKCS7(_hash, null, null, null, CryptoStandard.CMS);

            IExternalSignatureContainer external = new MyExternalSignatureContainer(encodedSignature);

            MakeSignature.SignDeferred(reader, signatureFieldName, os, external);
        }
    }
}