CipherData 类

定义

public ref class CipherData sealed

public sealed class CipherData

type CipherData = class

Public NotInheritable Class CipherData

继承

Object

CipherData

示例

下面的代码示例使用 EncryptedData 类创建包含 <EncryptedData><CipherData> 元素的元素，然后将 XML 写入 XML 文件。

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

/// This sample used the EncryptedData class to create a EncryptedData element
/// and write it to an XML file.
namespace EncryptedDataSample
{
    class Sample1
    {
        [STAThread]
        static void Main(string[] args)
        {
            // Create a new CipherData object.
            CipherData cd = new CipherData();
            // Assign a byte array to be the CipherValue. This is a byte array representing encrypted data.
            cd.CipherValue = new byte[8];
            // Create a new EncryptedData object.
            EncryptedData ed = new EncryptedData();
            //Add an encryption method to the object.
            ed.Id = "ED";
            ed.EncryptionMethod = new EncryptionMethod("http://www.w3.org/2001/04/xmlenc#aes128-cbc");
            ed.CipherData = cd;

            //Add key information to the object.
            KeyInfo ki = new KeyInfo();
            ki.AddClause(new KeyInfoRetrievalMethod("#EK", "http://www.w3.org/2001/04/xmlenc#EncryptedKey"));
            ed.KeyInfo = ki;

            // Create new XML document and put encrypted data into it.
            XmlDocument doc = new XmlDocument();
            XmlElement encryptionPropertyElement = (XmlElement)doc.CreateElement("EncryptionProperty", EncryptedXml.XmlEncNamespaceUrl);
            EncryptionProperty ep = new EncryptionProperty(encryptionPropertyElement);
            ed.AddProperty(ep);

            // Output the resulting XML information into a file.
            string path = @"c:\test\MyTest.xml";
            File.WriteAllText(path,ed.GetXml().OuterXml);
            //Console.WriteLine(ed.GetXml().OuterXml);
        }
    }
}

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


'/ This sample used the EncryptedData class to create a EncryptedData element
'/ and write it to an XML file.
Module EncryptedDataSample1

    Sub Main()
        ' Create a new CipherData object.
        Dim cd As New CipherData
        ' Assign a byte array to the CipherValue.
        cd.CipherValue = New Byte(7) {}
        ' Create a new EncryptedData object.
        Dim ed As New EncryptedData
        'Add an encryption method to the object.
        ed.Id = "ED"
        ed.EncryptionMethod = New EncryptionMethod("http://www.w3.org/2001/04/xmlenc#aes128-cbc")
        ed.CipherData = cd

        'Add key information to the object.
        Dim ki As New KeyInfo
        ki.AddClause(New KeyInfoRetrievalMethod("#EK", "http://www.w3.org/2001/04/xmlenc#EncryptedKey"))
        ed.KeyInfo = ki

        ' Create new XML document and put encrypted data into it.
        Dim doc As New XmlDocument
        Dim encryptionPropertyElement As XmlElement = CType(doc.CreateElement("EncryptionProperty", EncryptedXml.XmlEncNamespaceUrl), XmlElement)
        Dim ep As New EncryptionProperty(encryptionPropertyElement)
        ed.AddProperty(ep)

        ' Output the resulting XML information into a file.
        Dim path As String = "c:\test\MyTest.xml"
        File.WriteAllText(path, ed.GetXml().OuterXml)
        'End Sub
    End Sub

End Module

注解

类 CipherData 表示 <CipherData> XML 加密中的 元素。 它是提供加密数据的必需元素。 它必须包含作为元素的 base64 编码文本的 <CipherValue> 加密数据，或者使用 元素提供对包含加密数据的外部位置的 <CipherReference> 引用。

在许多情况下，无需直接创建 类的新实例 CipherData 。 、 EncryptedXmlEncryptedData和 EncryptedKey 类会为你创建实例。