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PdfDigitalSignatureHashAlgorithm Enumeration

Specifies a digital hash algorithm used by a digital signature.

Namespace:  Aspose.Words.Saving
Assembly:  Aspose.Words (in Aspose.Words.dll) Version: 21.5.0


public enum PdfDigitalSignatureHashAlgorithm


  Member nameValueDescription
Sha10 SHA-1 hash algorithm.
Sha2561 SHA-256 hash algorithm.
Sha3842 SHA-384 hash algorithm.
Sha5123 SHA-512 hash algorithm.
Md54 SHA-1 hash algorithm.


Shows how to sign a generated PDF document.
Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);
builder.Writeln("Contents of signed PDF.");

CertificateHolder certificateHolder = CertificateHolder.Create(MyDir + "morzal.pfx", "aw");

// Create a "PdfSaveOptions" object that we can pass to the document's "Save" method
// to modify how that method converts the document to .PDF.
PdfSaveOptions options = new PdfSaveOptions();

// Configure the "DigitalSignatureDetails" object of the "SaveOptions" object to
// digitally sign the document as we render it with the "Save" method.
DateTime signingTime = DateTime.Now;
options.DigitalSignatureDetails =
    new PdfDigitalSignatureDetails(certificateHolder, "Test Signing", "My Office", signingTime);
options.DigitalSignatureDetails.HashAlgorithm = PdfDigitalSignatureHashAlgorithm.Sha256;

Assert.AreEqual("Test Signing", options.DigitalSignatureDetails.Reason);
Assert.AreEqual("My Office", options.DigitalSignatureDetails.Location);
Assert.AreEqual(signingTime.ToUniversalTime(), options.DigitalSignatureDetails.SignatureDate.ToUniversalTime());

doc.Save(ArtifactsDir + "PdfSaveOptions.PdfDigitalSignature.pdf", options);

ExpandedSee Also