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IOcspClient Interface

Allows you to send an Online Certificate Status Protocol (OCSP) request for a certificate.

Namespace: DevExpress.Office.DigitalSignatures

Assembly: DevExpress.Pdf.v23.2.Core.dll

NuGet Package: DevExpress.Pdf.Core


public interface IOcspClient

The following members return IOcspClient objects:


The OcspClient class is the default IOcspClient interface implementation.

Pass the IOcspClient instance to the Pkcs7Signer object constructor, as shown below:

using DevExpress.Pdf;
using DevExpress.Office.DigitalSignatures;
using DevExpress.Office.Tsp;

using (var signer = new PdfDocumentSigner("Document.pdf"))
    IOcspClient ocspClient = new OcspClient();
    ICrlClient crlClient = new CrlClient();

    // the freetsa client is used for demonstration purposes
    ITsaClient tsaClient = new TsaClient(new Uri(@""), PdfHashAlgorithm.SHA256);

    // Create a PKCS#7 signature:
    Pkcs7Signer pkcs7Signature = new Pkcs7Signer("Signing Documents//testcert.pfx", "123",
     HashAlgorithmType.SHA256, tsaClient, ocspClient, crlClient, PdfSignatureProfile.PAdES_BES);

    // Create a new signature field:
    var signatureFieldInfo = new PdfSignatureFieldInfo(1);
    signatureFieldInfo.Name = "SignatureField";
    signatureFieldInfo.SignatureBounds = new PdfRectangle(10, 10, 150, 150);

    // Apply a signature with a new signature:
    var signature =
    new PdfSignatureBuilder(pkcs7Signature, signatureFieldInfo);

    // Sign and save the document:
    signer.SaveDocument("SignedDocument.pdf", signature);
See Also