使用 iTextSharp 5.3.3 和 USB 令牌签署 PDF [英] Sign PDF with iTextSharp 5.3.3 and USB token
本文介绍了使用 iTextSharp 5.3.3 和 USB 令牌签署 PDF的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我是 iTextSharp(和 StackOverFlow)的新手.我正在尝试使用外部 USB 令牌在 C# 中签署 PDF.我尝试使用从互联网上挖掘的以下代码.
I'm new to iTextSharp (and StackOverFlow). I'm trying to sign a PDF in C# using external USB token. I try using the follow code I've digged from the internet.
Org.BouncyCastle.X509.X509CertificateParser cp = new Org.BouncyCastle.X509.X509CertificateParser();
//Get Sertifiacte
X509Certificate2 certClient = null;
X509Store st = new X509Store(StoreName.My, StoreLocation.CurrentUser);
st.Open(OpenFlags.MaxAllowed);
X509Certificate2Collection collection = X509Certificate2UI.SelectFromCollection(st.Certificates, "Please choose certificate:", "", X509SelectionFlag.SingleSelection);
if (collection.Count > 0){
certClient = collection[0];
}
st.Close();
//Get Cert Chain
IList<Org.BouncyCastle.X509.X509Certificate> chain = new List<Org.BouncyCastle.X509.X509Certificate>();
X509Chain x509chain = new X509Chain();
x509chain.Build(certClient );
foreach (X509ChainElement x509ChainElement in x509chain.ChainElements){
chain.Add(DotNetUtilities.FromX509Certificate(x509ChainElement.Certificate));
}
PdfReader reader = new PdfReader(sourceDocument);
FileStream resStream = new FileStream(resultDocument, FileMode.Create, FileAccess.ReadWrite);
PdfStamper stamper = PdfStamper.CreateSignature(reader, resStream , ' ', null, true);
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
appearance.Reason = reason;
appearance.Location = location;
appearance.SetVisibleSignature(new iTextSharp.text.Rectangle(20, 10, 170, 60), 1, "Signed");
X509Certificate2Signature es = new X509Certificate2Signature(certClient, "SHA-1");
MakeSignature.SignDetached(appearance, es, chain, null, null, null, 0, CryptoStandard.CMS);
问题是我收到一个异常:
The problem is that I receive an exception:
System.Security.Cryptography.CryptographicException was unhandled
Message=Invalid type specified.
Source=mscorlib
StackTrace:
at System.Security.Cryptography.CryptographicException.ThrowCryptographicException(Int32 hr)
at System.Security.Cryptography.Utils._GetKeyParameter(SafeKeyHandle hKey, UInt32 paramID)
at System.Security.Cryptography.Utils.GetKeyPairHelper(CspAlgorithmType keyType, CspParameters parameters, Boolean randomKeyContainer, Int32 dwKeySize, SafeProvHandle& safeProvHandle, SafeKeyHandle& safeKeyHandle)
at System.Security.Cryptography.RSACryptoServiceProvider.GetKeyPair()
at System.Security.Cryptography.RSACryptoServiceProvider..ctor(Int32 dwKeySize, CspParameters parameters, Boolean useDefaultKeySize)
at System.Security.Cryptography.X509Certificates.X509Certificate2.get_PrivateKey()
at iTextSharp.text.pdf.security.X509Certificate2Signature..ctor(X509Certificate2 certificate, String hashAlgorithm)
at WindowsFormsApplication1.PDFSignerHelper.signPdfFile(String sourceDocument, String resultDocument, X509Certificate2 certClient, String reason, String location)
InnerException:
推荐答案
这种方法很适合我们(iTextSharp 5.3.3).我们使用智能卡和 USB 令牌(供应商 - www.author.kiev.ua):
This approach works fine for us (iTextSharp 5.3.3). We use smart-card and USB-token (vendor - www.author.kiev.ua):
X509Store store = new X509Store(StoreLocation.CurrentUser);
store.Open(OpenFlags.ReadOnly);
X509Certificate2Collection sel = X509Certificate2UI.SelectFromCollection(store.Certificates, null, null, X509SelectionFlag.SingleSelection);
X509Certificate2 cert = sel[0];
Org.BouncyCastle.X509.X509CertificateParser cp = new Org.BouncyCastle.X509.X509CertificateParser();
Org.BouncyCastle.X509.X509Certificate[] chain = new Org.BouncyCastle.X509.X509Certificate[] {
cp.ReadCertificate(cert.RawData)};
IExternalSignature externalSignature = new X509Certificate2Signature(cert, "SHA-1");
PdfReader pdfReader = new PdfReader(pathToBasePdf);
signedPdf = new FileStream(pathToBasePdf, FileMode.Create);
pdfStamper = PdfStamper.CreateSignature(pdfReader, signedPdf, ' ');
PdfSignatureAppearance signatureAppearance = pdfStamper.SignatureAppearance;
signatureAppearance.SignatureGraphic = Image.GetInstance(pathToSignatureImage);
signatureAppearance.SetVisibleSignature(new Rectangle(100, 100, 250, 150), pdfReader.NumberOfPages, "Signature");
signatureAppearance.SignatureRenderingMode = PdfSignatureAppearance.RenderingMode.GRAPHIC_AND_DESCRIPTION;
MakeSignature.SignDetached(signatureAppearance, externalSignature, chain, null, null, null, 0, CryptoStandard.CMS);
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