HashAlgorithm
PdfDigitalSignatureDetails.HashAlgorithm property
获取或设置哈希算法。
public PdfDigitalSignatureHashAlgorithm HashAlgorithm { get; set; }
评论
默认值是 SHA-256 算法。
例子
演示如何签署生成的 PDF 文档。
Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);
builder.Writeln("Contents of signed PDF.");
CertificateHolder certificateHolder = CertificateHolder.Create(MyDir + "morzal.pfx", "aw");
// 创建一个“PdfSaveOptions”对象，我们可以将其传递给文档的“Save”方法
// 修改该方法将文档转换为 .PDF 的方式。
PdfSaveOptions options = new PdfSaveOptions();
// 将“SaveOptions”对象的“DigitalSignatureDetails”对象配置为
// 当我们使用“Save”方法呈现文档时对文档进行数字签名。
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);
