PdfDigitalSignatureHashAlgorithm enumeration

Specifies a digital hash algorithm used by a digital signature.

public enum PdfDigitalSignatureHashAlgorithm


Sha2560SHA-256 hash algorithm.
Sha3841SHA-384 hash algorithm.
Sha5122SHA-512 hash algorithm.
RipeMD1603RIPEMD-160 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 = new DateTime(2015, 7, 20);
options.DigitalSignatureDetails =
    new PdfDigitalSignatureDetails(certificateHolder, "Test Signing", "My Office", signingTime);
options.DigitalSignatureDetails.HashAlgorithm = PdfDigitalSignatureHashAlgorithm.RipeMD160;

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

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

See Also