DataObject 构造函数

定义

命名空间:

System.Security.Cryptography.Xml

程序集:

System.Security.Cryptography.Xml.dll

包:

System.Security.Cryptography.Xml v11.0.0-preview.4.26230.115

初始化 DataObject 类的新实例。

重载

名称	说明
DataObject()	初始化 DataObject 类的新实例。
DataObject(String, String, String, XmlElement)	使用指定的标识、MIME 类型、编码和数据初始化类的新实例 DataObject 。

DataObject()

Source:

DataObject.cs

初始化 DataObject 类的新实例。

public:
 DataObject();

public DataObject();

Public Sub New ()

示例

下面的代码示例演示如何生成包围 XML 签名。

using System;
using System.IO;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;
using System.Xml;

public class XMLdsigsample1 {

static void Main(String[] args)
{
     // Create example data to sign.
     XmlDocument document = new XmlDocument();
     XmlNode  node = document.CreateNode(XmlNodeType.Element, "", "MyElement", "samples");
     node.InnerText = "This is some text";
     document.AppendChild(node);
     Console.Error.WriteLine("Data to sign:\n" + document.OuterXml + "\n");

     // Create the SignedXml message.
     SignedXml signedXml = new SignedXml();
     RSA key = RSA.Create();
     signedXml.SigningKey = key;

     // Create a data object to hold the data to sign.
     DataObject dataObject = new DataObject();
     dataObject.Data = document.ChildNodes;
     dataObject.Id = "MyObjectId";

     // Add the data object to the signature.
     signedXml.AddObject(dataObject);

     // Create a reference to be able to package everything into the
     // message.
     Reference reference = new Reference();
     reference.Uri = "#MyObjectId";

     // Add it to the message.
     signedXml.AddReference(reference);

     // Add a KeyInfo.
     KeyInfo keyInfo = new KeyInfo();
     keyInfo.AddClause(new RSAKeyValue(key));
     signedXml.KeyInfo = keyInfo;

     // Compute the signature.
     signedXml.ComputeSignature();

     // Get the XML representation of the signature.
     XmlElement xmlSignature = signedXml.GetXml();
     Console.WriteLine(xmlSignature.OuterXml);
}
}

Imports System.IO
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml
Imports System.Xml

 _


Public Class XMLdsigsample1

   Shared Sub Main(args() As [String])
      ' Create example data to sign.
      Dim document As New XmlDocument()
      Dim node As XmlNode = document.CreateNode(XmlNodeType.Element, "", "MyElement", "samples")
      node.InnerText = "This is some text"
      document.AppendChild(node)
      Console.Error.WriteLine("Data to sign:")
      Console.Error.WriteLine()
      Console.Error.WriteLine(document.OuterXml)
      Console.Error.WriteLine()
      
      ' Create the SignedXml message.
      Dim signedXml As New SignedXml()
      Dim key As RSA = RSA.Create()
      signedXml.SigningKey = key
      
      ' Create a data object to hold the data to sign.
      Dim dataObject As New DataObject()
      dataObject.Data = document.ChildNodes
      dataObject.Id = "MyObjectId"
      
      ' Add the data object to the signature.
      signedXml.AddObject(dataObject)
      
      ' Create a reference to be able to package everything into the
      ' message.
      Dim reference As New Reference()
      reference.Uri = "#MyObjectId"
      
      ' Add it to the message.
      signedXml.AddReference(reference)
      
      ' Add a KeyInfo.
      Dim keyInfo As New KeyInfo()
      keyInfo.AddClause(New RSAKeyValue(key))
      signedXml.KeyInfo = keyInfo
      
      ' Compute the signature.
      signedXml.ComputeSignature()
      
      ' Get the XML representation of the signature.
      Dim xmlSignature As XmlElement = signedXml.GetXml()
      Console.WriteLine(xmlSignature.OuterXml)
   End Sub
End Class

下面的代码示例演示如何检查 XML 签名。

using System;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;
using System.IO;
using System.Xml;

public class Verify {

    public static void Main(String[] args)
    {

        Console.WriteLine("Verifying " + args[0] + "...");

        // Create a SignedXml.
        SignedXml signedXml = new SignedXml();

        // Load the XML.
        XmlDocument xmlDocument = new XmlDocument();
        xmlDocument.PreserveWhitespace = true;
        xmlDocument.Load(new XmlTextReader(args[0]));

        XmlNodeList nodeList = xmlDocument.GetElementsByTagName("Signature");
        signedXml.LoadXml((XmlElement)nodeList[0]);

        if (signedXml.CheckSignature()) {
            Console.WriteLine("Signature check OK");
        } else {
            Console.WriteLine("Signature check FAILED");
        }
    }
}

Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml
Imports System.IO
Imports System.Xml

 _

Public Class Verify
   
   Public Shared Sub Main(args() As [String])
      
      Console.WriteLine(("Verifying " + args(0) + "..."))
      
      ' Create a SignedXml.
      Dim signedXml As New SignedXml()
      
      ' Load the XML.
      Dim xmlDocument As New XmlDocument()
      xmlDocument.PreserveWhitespace = True
      xmlDocument.Load(New XmlTextReader(args(0)))
      
      Dim nodeList As XmlNodeList = xmlDocument.GetElementsByTagName("Signature")
      signedXml.LoadXml(CType(nodeList(0), XmlElement))
      
      If signedXml.CheckSignature() Then
         Console.WriteLine("Signature check OK")
      Else
         Console.WriteLine("Signature check FAILED")
      End If
   End Sub
End Class

注解

该 DataObject 类与 XML 签名一起使用。 初始化 DataObject后，可以分配 Data 和 Id 属性。

DataObject(String, String, String, XmlElement)

Source:

DataObject.cs

使用指定的标识、MIME 类型、编码和数据初始化类的新实例 DataObject 。

public:
 DataObject(System::String ^ id, System::String ^ mimeType, System::String ^ encoding, System::Xml::XmlElement ^ data);

public DataObject(string id, string mimeType, string encoding, System.Xml.XmlElement data);

new System.Security.Cryptography.Xml.DataObject : string * string * string * System.Xml.XmlElement -> System.Security.Cryptography.Xml.DataObject

Public Sub New (id As String, mimeType As String, encoding As String, data As XmlElement)

参数

id

String

要初始化其新实例的 DataObject 标识。

mimeType

String

用于初始化新实例的 DataObject数据的 MIME 类型。

encoding

String

用于初始化新实例的数据的 DataObject编码。

data

XmlElement

要初始化其新实例 DataObject 的数据。

例外

ArgumentNullException

参数 data 为 null.

注解

该 DataObject 类与 XML 签名一起使用。 该 id 参数引用包含要使用的数据的元素的名称。 该 data 参数引用包含参数元素的 id XML 节点列表。