DataObject.Id プロパティとは何？わかりやすく解説 Weblio辞書

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.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

DataObject.Id プロパティ

現在の DataObject オブジェクトの ID を取得または設定します。

名前空間: System.Security.Cryptography.Xml
アセンブリ: System.Security (system.security.dll 内)
構文

Visual Basic (宣言)

Public Property Id As String

Visual Basic (使用法)

Dim instance As DataObject
Dim value As String

value = instance.Id

instance.Id = value

public string Id { get;
 set; }

C++

public:
property String^ Id {
    String^ get ();
    void set (String^ value);
}

/** @property */
public String get_Id ()

/** @property */
public void set_Id (String value)

JScript

public function get Id ()
 : String

public function set Id (value
 : String)

プロパティ値
使用するデータを含む要素の名前。

解説

ID は、別の場所から DataObject を参照するために使用されます。このプロパティの既定値は null 参照 (Visual Basic では Nothing) です。これは、ID が存在しないことを意味します。このプロパティは、通常 SignedInfo プロパティで参照されます。

使用例

エンベロープの XML 署名を生成する方法を次のコード例に示します。

Visual Basic

Imports System
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 'Main
End Class 'XMLdsigsample1

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);
}

}

C++

#using <System.dll>
#using <System.Xml.dll>
#using <System.Security.dll>

using namespace System;
using namespace System::IO;
using namespace System::Security::Cryptography;
using namespace System::Security::Cryptography::Xml;
using namespace System::Xml;
int main()
{
   
   // Create example data to sign.
   XmlDocument^ document = gcnew 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{0}\n", document->OuterXml
 );
   
   // Create the SignedXml message.
   SignedXml^ signedXml = gcnew SignedXml;
   RSA^ key = RSA::Create();
   signedXml->SigningKey = key;
   
   // Create a data object to hold the data to sign.
   DataObject^ dataObject = gcnew 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 = gcnew Reference;
   reference->Uri = "#MyObjectId";
   
   // Add it to the message.
   signedXml->AddReference( reference );
   
   // Add a KeyInfo.
   KeyInfo^ keyInfo = gcnew KeyInfo;
   keyInfo->AddClause( gcnew 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 );
}

import System.*;
import System.IO.*;
import System.Security.Cryptography.*;
import System.Security.Cryptography.Xml.*;
import System.Xml.*;

public class XmlDsigSample1
{
    public static void main(String[]
 args)
    {
        // Create example data to sign.
        XmlDocument document = new XmlDocument();
        XmlNode node = document.CreateNode(XmlNodeType.Element, "",
            "MyElement", "samples");
        node.set_InnerText("This is some text");
        document.AppendChild(node);
        Console.get_Error().WriteLine("Data to sign:\n" +
            document.get_OuterXml() + "\n");
        // Create the SignedXml message.
        SignedXml signedXml = new SignedXml();
        RSA key = RSA.Create();
        signedXml.set_SigningKey(key);
        // Create a data object to hold the data to sign.
        DataObject dataObject = new DataObject();
        dataObject.set_Data(document.get_ChildNodes());
        dataObject.set_Id("MyObjectId");
        // Add the data object to the signature.
        signedXml.AddObject(dataObject);
        // Create a reference to be able to
        Reference reference = new Reference();
        reference.set_Uri("#MyObjectId");
        // Add it to the message.
        signedXml.AddReference(reference);
        // Add a KeyInfo.
        KeyInfo keyInfo = new KeyInfo();
        keyInfo.AddClause(new RSAKeyValue(key));
        signedXml.set_KeyInfo(keyInfo);
        // Compute the signature.
        signedXml.ComputeSignature();
        // Get the XML representation of the signature.
        XmlElement xmlSignature = signedXml.GetXml();
        Console.WriteLine(xmlSignature.get_OuterXml());
    } //main
} //XmlDsigSample1

XML 署名を確認する方法を次のコード例に示します。

Visual Basic

Imports System
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 'Main 
End Class 'Verify

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");
        }

    }
}

C++

#using <System.dll>
#using <System.Security.dll>
#using <System.Xml.dll>

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Security::Cryptography::Xml;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   array<String^>^args = System::Environment::GetCommandLineArgs();
   Console::WriteLine( "Verifying {0}...", args[ 1 ] );

   // Create a SignedXml.
   SignedXml^ signedXml = gcnew SignedXml;

   // Load the XML.
   XmlDocument^ xmlDocument = gcnew XmlDocument;
   xmlDocument->PreserveWhitespace = true;
   xmlDocument->Load( gcnew XmlTextReader( args[ 1 ] ) );
   XmlNodeList^ nodeList = xmlDocument->GetElementsByTagName( "Signature"
 );
   signedXml->LoadXml( safe_cast<XmlElement^>(nodeList[ 0 ]) );
   if ( signedXml->CheckSignature() )
   {
      Console::WriteLine( "Signature check OK" );
   }
   else
   {
      Console::WriteLine( "Signature check FAILED" );
   }
}

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0

参照

関連項目
DataObject クラス
DataObject メンバ
System.Security.Cryptography.Xml 名前空間

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