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.NET Framework 4.5.2+
.NET Framework 4.5.2+
.NET Standard 2.0+

PdfDocumentSigner.AddToDss(String, IList<Byte[]>, IList<Byte[]>, IList<Byte[]>) Method

Adds information about the specified signature to the Document Security Store (DSS).

Namespace: DevExpress.Pdf

Assembly: DevExpress.Docs.v20.2.dll

Declaration

public void AddToDss(
    string signatureFieldName,
    IList<byte[]> certificates,
    IList<byte[]> crls,
    IList<byte[]> ocsp
)
Public Sub AddToDss(
    signatureFieldName As String,
    certificates As IList(Of Byte()),
    crls As IList(Of Byte()),
    ocsp As IList(Of Byte())
)

Parameters

Name Type Description
signatureFieldName String

The name of the form field that contains the target signature.

certificates IList<Byte[]>

A list of certificates used to create the certificate chain.

crls IList<Byte[]>

A list of DER-encoded CertificateList ASN.1 objects (rfc5280) that contain the Certificate Revocation List (CRL) for every certificate in the chain (except the root certificate).

ocsp IList<Byte[]>

A list of DER-encoded OCSPResponse ASN.1 objects (rfc6960) that contain the OCSP server response for every certificate in the chain except root.

Exceptions

Type Description
ArgumentException

Occurs if the specified form field is not signed.

Remarks

The code sample below retrieves the name of the first signature field, adds the related signature's information to the DSS, and applies a timestamp to the document.

using (var signer = new PdfDocumentSigner(@"signed.pdf"))
{
    ITsaClient tsaClient = new TsaClient(new Uri(@"https://freetsa.org/tsr"), HashAlgorithmType.SHA256);

    string signatureName = signer.GetSignatureFieldNames(false)[0];

   //Create a provider that retrieves certificates from a store:
    using (var certificateStoreProvider =
    new CertificateStoreProvider(new X509Store(StoreLocation.CurrentUser), true))
    {
        //Add the signature to the security store
        //And specify the CrlClient and OcspClient objects
        //Used to check the certificates' revocation status
        signer.AddToDss(signatureName, new CrlClient(), new OcspClient(), certificateStoreProvider);
    }
    signer.SaveDocument(@"signedLTV.pdf", new[] { new PdfSignatureBuilder(new PdfTimeStamp(tsaClient)) });
}
See Also