CipherData 建構函式

定義

命名空間:

System.Security.Cryptography.Xml

組件:

System.Security.Cryptography.Xml.dll

初始化 CipherData 類別的新執行個體。

多載

名稱	Description
CipherData()	初始化 CipherData 類別的新執行個體。
CipherData(Byte[])	以位元組陣列作為CipherValue值初始化該CipherData類別的新實例。
CipherData(CipherReference)	使用CipherReference物件初始化該類別的新實例CipherData。

CipherData()

來源:

CipherData.cs

初始化 CipherData 類別的新執行個體。

public:
 CipherData();

public CipherData();

Public Sub New ()

範例

以下程式碼範例說明如何建立該類別的新實例 CipherData 。 整個範例可在課程主題中找到 CipherData 。

// 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 CipherData object.
Dim cd As New CipherData
' Assign a byte array to the CipherValue.
cd.CipherValue = New Byte(7) {}

備註

此建構器 CipherData 建立一個物件 <CipherData> ，代表該元素在 XML 加密中。 該 <CipherData> 元素是 XML 加密中必須的元素。

CipherData(Byte[])

來源:

CipherData.cs

以位元組陣列作為CipherValue值初始化該CipherData類別的新實例。

public:
 CipherData(cli::array <System::Byte> ^ cipherValue);

public CipherData(byte[] cipherValue);

new System.Security.Cryptography.Xml.CipherData : byte[] -> System.Security.Cryptography.Xml.CipherData

Public Sub New (cipherValue As Byte())

參數

cipherValue

Byte[]

用於元素的加密資料 <CipherValue> 。

例外狀況

ArgumentNullException

參數 cipherValue 為 null。

CryptographicException

CipherValue該物業已經設定好。

範例

以下程式碼範例說明如何建立該類別的新實例 CipherData 。

// Create a new CipherData object using a byte array to represent encrypted data.
Byte[] sampledata = new byte[8];
CipherData cd = new CipherData(sampledata);

    ' Create a new CipherData object using a byte array to represent encrypted data.
Dim sampledata(7) As Byte
    Dim cd As New CipherData(sampledata)

備註

此建構器 CipherData 建立一個物件 <CipherData> ，代表該元素在 XML 加密中。 建構子將 cipherValue 該屬性的值 CipherValue 指派為實際加密的資料。

備註

元素 <CipherData> 可以同時擁有 a CipherReference 元素或 CipherValue 子元素，但不能同時擁有。 若兩者都被分配到同一CipherData物件，則為拋出 ACryptographicException。

CipherData(CipherReference)

來源:

CipherData.cs

使用CipherReference物件初始化該類別的新實例CipherData。

public:
 CipherData(System::Security::Cryptography::Xml::CipherReference ^ cipherReference);

public CipherData(System.Security.Cryptography.Xml.CipherReference cipherReference);

new System.Security.Cryptography.Xml.CipherData : System.Security.Cryptography.Xml.CipherReference -> System.Security.Cryptography.Xml.CipherData

Public Sub New (cipherReference As CipherReference)

參數

cipherReference

CipherReference

CipherReference要用的物品。

例外狀況

ArgumentNullException

參數 cipherReference 為 null。

CryptographicException

CipherValue該物業已經設定好。

範例

以下程式碼範例展示了如何利用CipherReference資訊建立該類別的新實例CipherData。

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

/// This sample used the EncryptedData class to create an encrypted data element
/// and write it to an XML file. It demonstrates the use of CipherReference.
namespace EncryptedDataSample
{
    class Example
    {
        [STAThread]
        static void Main(string[] args)
        {
            //Create a URI string.
            String uri = "http://www.woodgrovebank.com/document.xml";
            // Create a Base64 transform. The input content retrieved from the
            // URI should be Base64-decoded before other processing.
            Transform base64 = new XmlDsigBase64Transform();
            //Create a transform chain and add the transform to it.
            TransformChain tc = new TransformChain();
            tc.Add(base64);
            //Create <CipherReference> information.
            CipherReference reference = new CipherReference(uri, tc);

            // Create a new CipherData object using the CipherReference information.
            // Note that you cannot assign both a CipherReference and a CipherValue
            // to a CipherData object.
            CipherData cd = new CipherData(reference);

            // 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.
            try
            {
                string path = @"c:\test\MyTest.xml";

                File.WriteAllText(path, ed.GetXml().OuterXml);
            }
            catch (IOException e)
            {
                Console.WriteLine("File IO error. {0}", e);
            }
        }
    }
}

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. It demonstrates the use of CipherReference.
Module Module1

    Sub Main()
        ' Create a URI string.
        Dim uri As String = "http://www.woodgrovebank.com/document.xml"
        ' Create a Base64 transform. The input content retrieved from the
        ' URI should be Base64-decoded before other processing.
        Dim base64 As Transform = New XmlDsigBase64Transform
        Dim tc As New TransformChain
        tc.Add(base64)
        ' Create <CipherReference> information.
        Dim reference As CipherReference = New CipherReference(uri, tc)

        ' Create a new CipherData object.
        ' Note that you cannot assign both a CipherReference and a CipherValue
        ' to a CipherData object.
        Dim cd As CipherData = New CipherData(Reference)

        ' 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 Module

備註

此建構器會建立 CipherData 一個物件，以 XML 加密表示該 <CipherData> 元素，並將該值指派 cipherReference 給該 CipherReference 屬性。 物件 CipherReference 代表 <CipherReference> 該元素，提供加密資料的位置。

備註

一個 CipherData 物件可以擁有一個 CipherReference 性質或一個 CipherValue 性質，但不能同時擁有兩者。 若兩者都被分配到同一CipherData物件，則為拋出 ACryptographicException。