RSACryptoServiceProviderとは何？わかりやすく解説 Weblio辞書

.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

RSACryptoServiceProvider クラス

暗号サービスプロバイダ (CSP : Cryptographic Service Provider) によって提供された RSA アルゴリズムの実装を使用して、非対称暗号化および復号化を実行します。このクラスは継承できません。

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

Visual Basic (宣言)

<ComVisibleAttribute(True)> _
Public NotInheritable Class
 RSACryptoServiceProvider
    Inherits RSA
    Implements ICspAsymmetricAlgorithm

Visual Basic (使用法)

Dim instance As RSACryptoServiceProvider

[ComVisibleAttribute(true)] 
public sealed class RSACryptoServiceProvider
 : RSA, ICspAsymmetricAlgorithm

C++

[ComVisibleAttribute(true)] 
public ref class RSACryptoServiceProvider sealed
 : public RSA, ICspAsymmetricAlgorithm

/** @attribute ComVisibleAttribute(true) */ 
public final class RSACryptoServiceProvider
 extends RSA implements ICspAsymmetricAlgorithm

JScript

ComVisibleAttribute(true) 
public final class RSACryptoServiceProvider
 extends RSA implements ICspAsymmetricAlgorithm

解説

これは RSA の既定の実装です。

Microsoft Enhanced Cryptographic Provider がインストールされている場合、RSACryptoServiceProvider は 384 ビットから 16384 ビットのキー長を 8 ビット単位でサポートします。Microsoft ベース暗号化プロバイダがインストールされている場合は、384 ビットから 512 ビットのキー長を 8 ビット単位でサポートします。

Topic	Location
方法 : XML ドキュメントのデジタル署名を検証する	.NET Framework: セキュリティ
方法 : キーコンテナに非対称キーを格納する	.NET Framework: セキュリティ
方法 : デジタル署名で XML ドキュメントに署名する	.NET Framework: セキュリティ
方法 : 非対称キーで XML 要素を復号化する	.NET Framework: セキュリティ
方法 : 非対称キーで XML 要素を暗号化する	.NET Framework: セキュリティ

使用例

RSACryptoServiceProvider クラスを使用して、文字列をバイト配列に暗号化し、そのバイトを文字列に復号化するコード例を次に示します。

Visual Basic

Imports System
Imports System.Security.Cryptography
Imports System.Text

 _

Class RSACSPSample


    Shared Sub Main()
        Try
            'Create a UnicodeEncoder to convert between byte array and
 string.
            Dim ByteConverter As New
 UnicodeEncoding()

            'Create byte arrays to hold original, encrypted, and decrypted
 data.
            Dim dataToEncrypt As Byte()
 = ByteConverter.GetBytes("Data to Encrypt")
            Dim encryptedData() As Byte
            Dim decryptedData() As Byte

            'Create a new instance of RSACryptoServiceProvider to generate
            'public and private key data.
            Dim RSA As New
 RSACryptoServiceProvider()

            'Pass the data to ENCRYPT, the public key information 
            '(using RSACryptoServiceProvider.ExportParameters(false)
,
            'and a boolean flag specifying no OAEP padding.
            encryptedData = RSAEncrypt(dataToEncrypt, RSA.ExportParameters(False),
 False)

            'Pass the data to DECRYPT, the private key information 
            '(using RSACryptoServiceProvider.ExportParameters(true)
,
            'and a boolean flag specifying no OAEP padding.
            decryptedData = RSADecrypt(encryptedData, RSA.ExportParameters(True),
 False)

            'Display the decrypted plaintext to the console. 
            Console.WriteLine("Decrypted plaintext: {0}",
 ByteConverter.GetString(decryptedData))
        Catch e As ArgumentNullException
            'Catch this exception in case the encryption did
            'not succeed.
            Console.WriteLine("Encryption failed.")
        End Try
    End Sub


    Public Shared Function
 RSAEncrypt(ByVal DataToEncrypt() As Byte,
 ByVal RSAKeyInfo As RSAParameters, ByVal DoOAEPPadding As Boolean)
 As Byte()
        Try
            'Create a new instance of RSACryptoServiceProvider.
            Dim RSA As New
 RSACryptoServiceProvider()

            'Import the RSA Key information. This only needs
            'toinclude the public key information.
            RSA.ImportParameters(RSAKeyInfo)

            'Encrypt the passed byte array and specify OAEP padding.
  
            'OAEP padding is only available on Microsoft Windows XP
 or
            'later.  
            Return RSA.Encrypt(DataToEncrypt, DoOAEPPadding)
            'Catch and display a CryptographicException  
            'to the console.
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return Nothing
        End Try
    End Function


    Public Shared Function
 RSADecrypt(ByVal DataToDecrypt() As Byte,
 ByVal RSAKeyInfo As RSAParameters, ByVal DoOAEPPadding As Boolean)
 As Byte()
        Try
            'Create a new instance of RSACryptoServiceProvider.
            Dim RSA As New
 RSACryptoServiceProvider()

            'Import the RSA Key information. This needs
            'to include the private key information.
            RSA.ImportParameters(RSAKeyInfo)

            'Decrypt the passed byte array and specify OAEP padding.
  
            'OAEP padding is only available on Microsoft Windows XP
 or
            'later.  
            Return RSA.Decrypt(DataToDecrypt, DoOAEPPadding)
            'Catch and display a CryptographicException  
            'to the console.
        Catch e As CryptographicException
            Console.WriteLine(e.ToString())

            Return Nothing
        End Try
    End Function
End Class

using System;
using System.Security.Cryptography;
using System.Text;

class RSACSPSample
{

    static void Main()
    {
        try
        {
            //Create a UnicodeEncoder to convert between byte array
 and string.
            UnicodeEncoding ByteConverter = new UnicodeEncoding();

            //Create byte arrays to hold original, encrypted, and decrypted
 data.
            byte[] dataToEncrypt = ByteConverter.GetBytes("Data to Encrypt");
            byte[] encryptedData;
            byte[] decryptedData;
            
            //Create a new instance of RSACryptoServiceProvider to generate
            //public and private key data.
            RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();

            //Pass the data to ENCRYPT, the public key information 
            //(using RSACryptoServiceProvider.ExportParameters(false)
,
            //and a boolean flag specifying no OAEP padding.
            encryptedData = RSAEncrypt(dataToEncrypt,RSA.ExportParameters(false),
 false);

            //Pass the data to DECRYPT, the private key information
 
            //(using RSACryptoServiceProvider.ExportParameters(true)
,
            //and a boolean flag specifying no OAEP padding.
            decryptedData = RSADecrypt(encryptedData,RSA.ExportParameters(true),
 false);

            //Display the decrypted plaintext to the console. 
            Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));
        }
        catch(ArgumentNullException)
        {
            //Catch this exception in case the encryption did
            //not succeed.
            Console.WriteLine("Encryption failed.");

        }
    }

    static public byte[] RSAEncrypt(byte[]
 DataToEncrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding)
    {
        try
        {    
            //Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();

            //Import the RSA Key information. This only needs
            //toinclude the public key information.
            RSA.ImportParameters(RSAKeyInfo);

            //Encrypt the passed byte array and specify OAEP padding.
  
            //OAEP padding is only available on Microsoft Windows XP
 or
            //later.  
            return RSA.Encrypt(DataToEncrypt, DoOAEPPadding);
        }
        //Catch and display a CryptographicException  
        //to the console.
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return null;
        }

    }

    static public byte[] RSADecrypt(byte[]
 DataToDecrypt, RSAParameters RSAKeyInfo,bool DoOAEPPadding)
    {
        try
        {
            //Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();

            //Import the RSA Key information. This needs
            //to include the private key information.
            RSA.ImportParameters(RSAKeyInfo);

            //Decrypt the passed byte array and specify OAEP padding.
  
            //OAEP padding is only available on Microsoft Windows XP
 or
            //later.  
            return RSA.Decrypt(DataToDecrypt, DoOAEPPadding);
        }
        //Catch and display a CryptographicException  
        //to the console.
        catch(CryptographicException e)
        {
            Console.WriteLine(e.ToString());

            return null;
        }

    }
}

C++

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
array<Byte>^ RSAEncrypt( array<Byte>^DataToEncrypt, RSAParameters RSAKeyInfo,
 bool DoOAEPPadding )
{
   try
   {
      
      //Create a new instance of RSACryptoServiceProvider.
      RSACryptoServiceProvider^ RSA = gcnew RSACryptoServiceProvider;
      
      //Import the RSA Key information. This only needs
      //toinclude the public key information.
      RSA->ImportParameters( RSAKeyInfo );
      
      //Encrypt the passed byte array and specify OAEP padding.  
      //OAEP padding is only available on Microsoft Windows XP or
      //later.  
      return RSA->Encrypt( DataToEncrypt, DoOAEPPadding );
   }
   //Catch and display a CryptographicException  
   //to the console.
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return nullptr;
   }

}

array<Byte>^ RSADecrypt( array<Byte>^DataToDecrypt, RSAParameters RSAKeyInfo,
 bool DoOAEPPadding )
{
   try
   {
      
      //Create a new instance of RSACryptoServiceProvider.
      RSACryptoServiceProvider^ RSA = gcnew RSACryptoServiceProvider;
      
      //Import the RSA Key information. This needs
      //to include the private key information.
      RSA->ImportParameters( RSAKeyInfo );
      
      //Decrypt the passed byte array and specify OAEP padding.  
      //OAEP padding is only available on Microsoft Windows XP or
      //later.  
      return RSA->Decrypt( DataToDecrypt, DoOAEPPadding );
   }
   //Catch and display a CryptographicException  
   //to the console.
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e );
      return nullptr;
   }

}

int main()
{
   try
   {
      
      //Create a UnicodeEncoder to convert between byte array and string.
      UnicodeEncoding^ ByteConverter = gcnew UnicodeEncoding;
      
      //Create byte arrays to hold original, encrypted, and decrypted
 data.
      array<Byte>^dataToEncrypt = ByteConverter->GetBytes( "Data to
 Encrypt" );
      array<Byte>^encryptedData;
      array<Byte>^decryptedData;
      
      //Create a new instance of RSACryptoServiceProvider to generate
      //public and private key data.
      RSACryptoServiceProvider^ RSA = gcnew RSACryptoServiceProvider;
      
      //Pass the data to ENCRYPT, the public key information 
      //(using RSACryptoServiceProvider.ExportParameters(false),
      //and a boolean flag specifying no OAEP padding.
      encryptedData = RSAEncrypt( dataToEncrypt, RSA->ExportParameters( false
 ), false );
      
      //Pass the data to DECRYPT, the private key information 
      //(using RSACryptoServiceProvider.ExportParameters(true),
      //and a boolean flag specifying no OAEP padding.
      decryptedData = RSADecrypt( encryptedData, RSA->ExportParameters( true
 ), false );
      
      //Display the decrypted plaintext to the console. 
      Console::WriteLine( "Decrypted plaintext: {0}", ByteConverter->GetString(
 decryptedData ) );
   }
   catch ( ArgumentNullException^ ) 
   {
      
      //Catch this exception in case the encryption did
      //not succeed.
      Console::WriteLine( "Encryption failed." );
   }

}

import System.*;
import System.Security.Cryptography.*;
import System.Text.*;

class RSACSPSample
{
    public static void main(String[]
 args)
    {
        try {
            // Create a UnicodeEncoder to convert between byte array
 and string.
            UnicodeEncoding byteConverter =  new UnicodeEncoding();
            
            // Create byte arrays to hold original, encrypted, 
            // and decrypted data.
            ubyte dataToEncrypt[] = byteConverter.GetBytes("Data to Encrypt");
            ubyte encryptedData[];
            ubyte decryptedData[];
            
            // Create a new instance of RSACryptoServiceProvider to
 generate
            // public and private key data.
            RSACryptoServiceProvider rsa =  new RSACryptoServiceProvider();
            
            // Pass the data to ENCRYPT, the public key information
 
            // (using RSACryptoServiceProvider.ExportParameters(false)
,
            // and a boolean flag specifying no OAEP padding.
            encryptedData = RSAEncrypt(dataToEncrypt, 
                rsa.ExportParameters(false), false);
            
            // Pass the data to DECRYPT, the private key information
 
            //(using RSACryptoServiceProvider.ExportParameters(true)
,
            // and a boolean flag specifying no OAEP padding.
            decryptedData = RSADecrypt(encryptedData, 
                rsa.ExportParameters(true), false);
            
            // Display the decrypted plaintext to the console. 
            Console.WriteLine("Decrypted plaintext: {0}", 
                byteConverter.GetString(decryptedData));
        }
        catch (ArgumentNullException exp) {
            //Catch this exception in case the encryption did
            //not succeed.
            Console.WriteLine("Encryption failed.");
        }
    } //main 

    public static ubyte[] RSAEncrypt(ubyte
 dataToEncrypt[], 
        RSAParameters rsaKeyInfo, boolean doOaepPadding) 
    {
        try {
            // Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider rsa =  new RSACryptoServiceProvider();
            
            // Import the rsa Key information. This only needs
            // toinclude the public key information.
            rsa.ImportParameters(rsaKeyInfo);
            
            // Encrypt the passed byte array and specify OAEP padding.
  
            // OAEP padding is only available on Microsoft Windows XP
 or
            // later.  
            return rsa.Encrypt(dataToEncrypt, doOaepPadding) ;
        }
        // Catch and display a CryptographicException  
        // to the console.
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
            return null ;
        }
    } //RSAEncrypt

    public static ubyte[] RSADecrypt(ubyte
 dataToDecrypt[], 
        RSAParameters rsaKeyInfo, boolean doOaepPadding) 
    {
        try {
            // Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider rsa =  new RSACryptoServiceProvider();
            
            // Import the rsa Key information. This needs
            // to include the private key information.
            rsa.ImportParameters(rsaKeyInfo);
            
            // Decrypt the passed byte array and specify OAEP padding.
  
            // OAEP padding is only available on Microsoft Windows XP
 or
            // later.  
            return rsa.Decrypt(dataToDecrypt, doOaepPadding) ;
        }
        // Catch and display a CryptographicException  
        // to the console.
        catch (CryptographicException e) {
            Console.WriteLine(e.ToString());
            return null ;
        }
    } //RSADecrypt
} //RSACSPSample

RSACryptoServiceProvider を使用して作成したキー情報を RSAParameters オブジェクトにエクスポートするコード例を次に示します。

Visual Basic

Try

    'Create a new RSACryptoServiceProvider object. 
    Dim RSA As New RSACryptoServiceProvider()

    'Export the key information to an RSAParameters object.
    'Pass false to export the public key information or pass
    'true to export public and private key information.
    Dim RSAParams As RSAParameters = RSA.ExportParameters(False)


Catch e As CryptographicException
    'Catch this exception in case the encryption did
    'not succeed.
    Console.WriteLine(e.Message)
End Try

try
{
    //Create a new RSACryptoServiceProvider object.
    RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();


    //Export the key information to an RSAParameters object.
    //Pass false to export the public key information or pass
    //true to export public and private key information.
    RSAParameters RSAParams = RSA.ExportParameters(false);


}
catch(CryptographicException e)
{
    //Catch this exception in case the encryption did
    //not succeed.
    Console.WriteLine(e.Message);

}

C++

try
{
   //Create a new RSACryptoServiceProvider Object*.
   RSACryptoServiceProvider^ RSA = gcnew RSACryptoServiceProvider;
   
   //Export the key information to an RSAParameters object.
   //Pass false to export the public key information or pass
   //true to export public and private key information.
   RSAParameters RSAParams = RSA->ExportParameters( false );
}
catch ( CryptographicException^ e ) 
{
   //Catch this exception in case the encryption did
   //not succeed.
   Console::WriteLine( e->Message );
}

try {
    // Create a new RSACryptoServiceProvider object.
    RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();

    // Export the key information to an RSAParameters object.
    // Pass false to export the public key information or pass
    // true to export public and private key information.
    RSAParameters rsaParams = rsa.ExportParameters(false);
}
catch (CryptographicException e) {
    // Catch this exception in case the encryption did
    // not succeed.
    Console.WriteLine(e.get_Message());
}

継承階層

System.Object
   System.Security.Cryptography.AsymmetricAlgorithm
     System.Security.Cryptography.RSA
      System.Security.Cryptography.RSACryptoServiceProvider

スレッドセーフ

この型の public static (Visual Basic では Shared) メンバはすべて、スレッドセーフです。インスタンスメンバの場合は、スレッドセーフであるとは限りません。

プラットフォーム

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0

参照

関連項目
RSACryptoServiceProvider メンバ
System.Security.Cryptography 名前空間
その他の技術情報
暗号サービス

RSACryptoServiceProvider コンストラクタ ()

既定のキーを使用して、RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。

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

Visual Basic (宣言)

Public Sub New

Visual Basic (使用法)

Dim instance As New RSACryptoServiceProvider

public RSACryptoServiceProvider ()

C++

public:
RSACryptoServiceProvider ()

public RSACryptoServiceProvider ()

JScript

public function RSACryptoServiceProvider ()

例外

例外の種類	条件
CryptographicException	暗号サービスプロバイダ (CSP) を取得できません。

解説

既定のキーが見つからない場合は、新しいキーが作成されます。

このコンストラクタは、セッションキーの暗号化に適した Exchange キーペアを作成し、セッションキーを安全に格納して他のユーザーと交換できるようにします。生成されたキーは、アンマネージ CAPI (Microsoft Cryptographic API) で使用する AT_KEYEXCHANGE 値を使用して生成されたキーに対応します。

使用例

RSACryptoServiceProvider クラスを使用して、文字列をバイト配列に暗号化し、そのバイトを文字列に復号化するコード例を次に示します。

Visual Basic

Imports System
Imports System.Security.Cryptography
Imports System.Text

 _

Class RSACSPSample


    Shared Sub Main()
        Try
            'Create a UnicodeEncoder to convert between byte array and
 string.
            Dim ByteConverter As New
 UnicodeEncoding()

            'Create byte arrays to hold original, encrypted, and decrypted
 data.
            Dim dataToEncrypt As Byte()
 = ByteConverter.GetBytes("Data to Encrypt")
            Dim encryptedData() As Byte
            Dim decryptedData() As Byte

            'Create a new instance of RSACryptoServiceProvider to generate
            'public and private key data.
            Dim RSA As New
 RSACryptoServiceProvider()

            'Pass the data to ENCRYPT, the public key information 
            '(using RSACryptoServiceProvider.ExportParameters(false)
,
            'and a boolean flag specifying no OAEP padding.
            encryptedData = RSAEncrypt(dataToEncrypt, RSA.ExportParameters(False),
 False)

            'Pass the data to DECRYPT, the private key information 
            '(using RSACryptoServiceProvider.ExportParameters(true)
,
            'and a boolean flag specifying no OAEP padding.
            decryptedData = RSADecrypt(encryptedData, RSA.ExportParameters(True),
 False)

            'Display the decrypted plaintext to the console. 
            Console.WriteLine("Decrypted plaintext: {0}",
 ByteConverter.GetString(decryptedData))
        Catch e As ArgumentNullException
            'Catch this exception in case the encryption did
            'not succeed.
            Console.WriteLine("Encryption failed.")
        End Try
    End Sub


    Public Shared Function
 RSAEncrypt(ByVal DataToEncrypt() As Byte,
 ByVal RSAKeyInfo As RSAParameters, ByVal DoOAEPPadding As Boolean)
 As Byte()
        Try
            'Create a new instance of RSACryptoServiceProvider.
            Dim RSA As New
 RSACryptoServiceProvider()

            'Import the RSA Key information. This only needs
            'toinclude the public key information.
            RSA.ImportParameters(RSAKeyInfo)

            'Encrypt the passed byte array and specify OAEP padding.
  
            'OAEP padding is only available on Microsoft Windows XP
 or
            'later.  
            Return RSA.Encrypt(DataToEncrypt, DoOAEPPadding)
            'Catch and display a CryptographicException  
            'to the console.
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return Nothing
        End Try
    End Function


    Public Shared Function
 RSADecrypt(ByVal DataToDecrypt() As Byte,
 ByVal RSAKeyInfo As RSAParameters, ByVal DoOAEPPadding As Boolean)
 As Byte()
        Try
            'Create a new instance of RSACryptoServiceProvider.
            Dim RSA As New
 RSACryptoServiceProvider()

            'Import the RSA Key information. This needs
            'to include the private key information.
            RSA.ImportParameters(RSAKeyInfo)

            'Decrypt the passed byte array and specify OAEP padding.
  
            'OAEP padding is only available on Microsoft Windows XP
 or
            'later.  
            Return RSA.Decrypt(DataToDecrypt, DoOAEPPadding)
            'Catch and display a CryptographicException  
            'to the console.
        Catch e As CryptographicException
            Console.WriteLine(e.ToString())

            Return Nothing
        End Try
    End Function
End Class

using System;
using System.Security.Cryptography;
using System.Text;

class RSACSPSample
{

    static void Main()
    {
        try
        {
            //Create a UnicodeEncoder to convert between byte array
 and string.
            UnicodeEncoding ByteConverter = new UnicodeEncoding();

            //Create byte arrays to hold original, encrypted, and decrypted
 data.
            byte[] dataToEncrypt = ByteConverter.GetBytes("Data to Encrypt");
            byte[] encryptedData;
            byte[] decryptedData;
            
            //Create a new instance of RSACryptoServiceProvider to generate
            //public and private key data.
            RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();

            //Pass the data to ENCRYPT, the public key information 
            //(using RSACryptoServiceProvider.ExportParameters(false)
,
            //and a boolean flag specifying no OAEP padding.
            encryptedData = RSAEncrypt(dataToEncrypt,RSA.ExportParameters(false),
 false);

            //Pass the data to DECRYPT, the private key information
 
            //(using RSACryptoServiceProvider.ExportParameters(true)
,
            //and a boolean flag specifying no OAEP padding.
            decryptedData = RSADecrypt(encryptedData,RSA.ExportParameters(true),
 false);

            //Display the decrypted plaintext to the console. 
            Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));
        }
        catch(ArgumentNullException)
        {
            //Catch this exception in case the encryption did
            //not succeed.
            Console.WriteLine("Encryption failed.");

        }
    }

    static public byte[] RSAEncrypt(byte[]
 DataToEncrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding)
    {
        try
        {    
            //Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();

            //Import the RSA Key information. This only needs
            //toinclude the public key information.
            RSA.ImportParameters(RSAKeyInfo);

            //Encrypt the passed byte array and specify OAEP padding.
  
            //OAEP padding is only available on Microsoft Windows XP
 or
            //later.  
            return RSA.Encrypt(DataToEncrypt, DoOAEPPadding);
        }
        //Catch and display a CryptographicException  
        //to the console.
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return null;
        }

    }

    static public byte[] RSADecrypt(byte[]
 DataToDecrypt, RSAParameters RSAKeyInfo,bool DoOAEPPadding)
    {
        try
        {
            //Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();

            //Import the RSA Key information. This needs
            //to include the private key information.
            RSA.ImportParameters(RSAKeyInfo);

            //Decrypt the passed byte array and specify OAEP padding.
  
            //OAEP padding is only available on Microsoft Windows XP
 or
            //later.  
            return RSA.Decrypt(DataToDecrypt, DoOAEPPadding);
        }
        //Catch and display a CryptographicException  
        //to the console.
        catch(CryptographicException e)
        {
            Console.WriteLine(e.ToString());

            return null;
        }

    }
}

C++

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
array<Byte>^ RSAEncrypt( array<Byte>^DataToEncrypt, RSAParameters RSAKeyInfo,
 bool DoOAEPPadding )
{
   try
   {
      
      //Create a new instance of RSACryptoServiceProvider.
      RSACryptoServiceProvider^ RSA = gcnew RSACryptoServiceProvider;
      
      //Import the RSA Key information. This only needs
      //toinclude the public key information.
      RSA->ImportParameters( RSAKeyInfo );
      
      //Encrypt the passed byte array and specify OAEP padding.  
      //OAEP padding is only available on Microsoft Windows XP or
      //later.  
      return RSA->Encrypt( DataToEncrypt, DoOAEPPadding );
   }
   //Catch and display a CryptographicException  
   //to the console.
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return nullptr;
   }

}

array<Byte>^ RSADecrypt( array<Byte>^DataToDecrypt, RSAParameters RSAKeyInfo,
 bool DoOAEPPadding )
{
   try
   {
      
      //Create a new instance of RSACryptoServiceProvider.
      RSACryptoServiceProvider^ RSA = gcnew RSACryptoServiceProvider;
      
      //Import the RSA Key information. This needs
      //to include the private key information.
      RSA->ImportParameters( RSAKeyInfo );
      
      //Decrypt the passed byte array and specify OAEP padding.  
      //OAEP padding is only available on Microsoft Windows XP or
      //later.  
      return RSA->Decrypt( DataToDecrypt, DoOAEPPadding );
   }
   //Catch and display a CryptographicException  
   //to the console.
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e );
      return nullptr;
   }

}

int main()
{
   try
   {
      
      //Create a UnicodeEncoder to convert between byte array and string.
      UnicodeEncoding^ ByteConverter = gcnew UnicodeEncoding;
      
      //Create byte arrays to hold original, encrypted, and decrypted
 data.
      array<Byte>^dataToEncrypt = ByteConverter->GetBytes( "Data to
 Encrypt" );
      array<Byte>^encryptedData;
      array<Byte>^decryptedData;
      
      //Create a new instance of RSACryptoServiceProvider to generate
      //public and private key data.
      RSACryptoServiceProvider^ RSA = gcnew RSACryptoServiceProvider;
      
      //Pass the data to ENCRYPT, the public key information 
      //(using RSACryptoServiceProvider.ExportParameters(false),
      //and a boolean flag specifying no OAEP padding.
      encryptedData = RSAEncrypt( dataToEncrypt, RSA->ExportParameters( false
 ), false );
      
      //Pass the data to DECRYPT, the private key information 
      //(using RSACryptoServiceProvider.ExportParameters(true),
      //and a boolean flag specifying no OAEP padding.
      decryptedData = RSADecrypt( encryptedData, RSA->ExportParameters( true
 ), false );
      
      //Display the decrypted plaintext to the console. 
      Console::WriteLine( "Decrypted plaintext: {0}", ByteConverter->GetString(
 decryptedData ) );
   }
   catch ( ArgumentNullException^ ) 
   {
      
      //Catch this exception in case the encryption did
      //not succeed.
      Console::WriteLine( "Encryption failed." );
   }

}

import System.*;
import System.Security.Cryptography.*;
import System.Text.*;

class RSACSPSample
{
    public static void main(String[]
 args)
    {
        try {
            // Create a UnicodeEncoder to convert between byte array
 and string.
            UnicodeEncoding byteConverter =  new UnicodeEncoding();
            
            // Create byte arrays to hold original, encrypted, 
            // and decrypted data.
            ubyte dataToEncrypt[] = byteConverter.GetBytes("Data to Encrypt");
            ubyte encryptedData[];
            ubyte decryptedData[];
            
            // Create a new instance of RSACryptoServiceProvider to
 generate
            // public and private key data.
            RSACryptoServiceProvider rsa =  new RSACryptoServiceProvider();
            
            // Pass the data to ENCRYPT, the public key information
 
            // (using RSACryptoServiceProvider.ExportParameters(false)
,
            // and a boolean flag specifying no OAEP padding.
            encryptedData = RSAEncrypt(dataToEncrypt, 
                rsa.ExportParameters(false), false);
            
            // Pass the data to DECRYPT, the private key information
 
            //(using RSACryptoServiceProvider.ExportParameters(true)
,
            // and a boolean flag specifying no OAEP padding.
            decryptedData = RSADecrypt(encryptedData, 
                rsa.ExportParameters(true), false);
            
            // Display the decrypted plaintext to the console. 
            Console.WriteLine("Decrypted plaintext: {0}", 
                byteConverter.GetString(decryptedData));
        }
        catch (ArgumentNullException exp) {
            //Catch this exception in case the encryption did
            //not succeed.
            Console.WriteLine("Encryption failed.");
        }
    } //main 

    public static ubyte[] RSAEncrypt(ubyte
 dataToEncrypt[], 
        RSAParameters rsaKeyInfo, boolean doOaepPadding) 
    {
        try {
            // Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider rsa =  new RSACryptoServiceProvider();
            
            // Import the rsa Key information. This only needs
            // toinclude the public key information.
            rsa.ImportParameters(rsaKeyInfo);
            
            // Encrypt the passed byte array and specify OAEP padding.
  
            // OAEP padding is only available on Microsoft Windows XP
 or
            // later.  
            return rsa.Encrypt(dataToEncrypt, doOaepPadding) ;
        }
        // Catch and display a CryptographicException  
        // to the console.
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
            return null ;
        }
    } //RSAEncrypt

    public static ubyte[] RSADecrypt(ubyte
 dataToDecrypt[], 
        RSAParameters rsaKeyInfo, boolean doOaepPadding) 
    {
        try {
            // Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider rsa =  new RSACryptoServiceProvider();
            
            // Import the rsa Key information. This needs
            // to include the private key information.
            rsa.ImportParameters(rsaKeyInfo);
            
            // Decrypt the passed byte array and specify OAEP padding.
  
            // OAEP padding is only available on Microsoft Windows XP
 or
            // later.  
            return rsa.Decrypt(dataToDecrypt, doOaepPadding) ;
        }
        // Catch and display a CryptographicException  
        // to the console.
        catch (CryptographicException e) {
            Console.WriteLine(e.ToString());
            return null ;
        }
    } //RSADecrypt
} //RSACSPSample

.NET Framework のセキュリティ

SecurityPermission (アンマネージコードを呼び出すために必要なアクセス許可)。SecurityPermissionFlag.UnmanagedCode (関連する列挙体)。

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
.NET Compact Framework
サポート対象 : 2.0

参照

関連項目
RSACryptoServiceProvider クラス
RSACryptoServiceProvider メンバ
System.Security.Cryptography 名前空間
その他の技術情報
暗号サービス

RSACryptoServiceProvider コンストラクタ (CspParameters)

指定したパラメータを使用して、RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。

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

Visual Basic (宣言)

Public Sub New ( _
    parameters As CspParameters _
)

Visual Basic (使用法)

Dim parameters As CspParameters

Dim instance As New RSACryptoServiceProvider(parameters)

public RSACryptoServiceProvider (
    CspParameters parameters
)

C++

public:
RSACryptoServiceProvider (
    CspParameters^ parameters
)

public RSACryptoServiceProvider (
    CspParameters parameters
)

JScript

public function RSACryptoServiceProvider (
    parameters : CspParameters
)

パラメータ

parameters: 暗号サービスプロバイダ (CSP) に渡すパラメータ。

例外

例外の種類	条件
CryptographicException	CSP を取得できません。

解説

このコンストラクタは、parameters パラメータの KeyContainerName フィールドを使用して指定したキーコンテナを作成または再利用します。

既定では、このコンストラクタは、セッションキーの暗号化に適した Exchange キーペアを作成し、セッションキーを安全に格納して他のユーザーと交換できるようにします。生成されたキーは、アンマネージ CAPI (Microsoft Cryptographic API) で使用する AT_KEYEXCHANGE 値を使用して生成されたキーに対応します。

(デジタル署名済みの) メッセージまたはファイルの認証に適した Signature キーペアを作成するには、parameters パラメータの KeyNumber フィールドを Signature 値に設定します。この種類のキーは、CAPI で使用される AT_SIGNATURE 値に対応します。

Exchange 値を指定して RSACryptoServiceProvider オブジェクトを作成し、Signature 値を指定して別の RSACryptoServiceProvider オブジェクトを作成する場合に、両方のオブジェクトに同じキーコンテナ名が指定されていると、両方のキーが 1 つのコンテナに格納されます。

RSACryptoServiceProvider クラスを使用して厳密な名前の署名と互換性のあるキーを作成するには、Signature キーペアを作成する必要があります。

使用例

RSACryptoServiceProvider オブジェクトを作成し、新しいキーを生成して、このキーをキーコンテナ内に格納するコード例を次に示します。

Visual Basic

Imports System.Security.Cryptography
Imports System.Text

Module RSACSPExample

    Sub Main()
        Try
            Dim KeyContainerName As String
 = "MyKeyContainer"

            'Create a new key and persist it in 
            'the key container.
            RSAPersistKeyInCSP(KeyContainerName)

            'Create a UnicodeEncoder to convert between byte array and
 string.
            Dim ByteConverter As New
 UnicodeEncoding

            'Create byte arrays to hold original, encrypted, and decrypted
 data.
            Dim dataToEncrypt As Byte()
 = ByteConverter.GetBytes("Data to Encrypt")
            Dim encryptedData() As Byte
            Dim decryptedData() As Byte

            'Pass the data to ENCRYPT, the name of the key container,
 
            'and a boolean flag specifying no OAEP padding.
            encryptedData = RSAEncrypt(dataToEncrypt, KeyContainerName, False)

            'Pass the data to DECRYPT, the name of the key container,
 
            'and a boolean flag specifying no OAEP padding.
            decryptedData = RSADecrypt(encryptedData, KeyContainerName, False)

            'Display the decrypted plaintext to the console. 
            Console.WriteLine("Decrypted plaintext: {0}",
 ByteConverter.GetString(decryptedData))

            RSADeleteKeyInCSP(KeyContainerName)
        Catch e As ArgumentNullException
            'Catch this exception in case the encryption did
            'not succeed.
            Console.WriteLine("Encryption failed.")
        End Try
    End Sub


    Sub RSAPersistKeyInCSP(ByVal ContainerName
 As String)
        Try
            ' Create a new instance of CspParameters.  Pass
            ' 13 to specify a DSA container or 1 to specify
            ' an RSA container.  The default is 1.
            Dim cspParams As New
 CspParameters

            ' Specify the container name using the passed variable.
            cspParams.KeyContainerName = ContainerName

            'Create a new instance of RSACryptoServiceProvider to generate
            'a new key pair.  Pass the CspParameters class to persist
 the 
            'key in the container.
            Dim RSAalg As New
 RSACryptoServiceProvider(cspParams)

            'Indicate that the key was persisted.
            Console.WriteLine("The RSA key was persisted in the
 container, ""{0}"".",
 ContainerName)
        Catch e As CryptographicException
            Console.WriteLine(e.Message)
        End Try
    End Sub


    Sub RSADeleteKeyInCSP(ByVal ContainerName
 As String)
        Try
            ' Create a new instance of CspParameters.  Pass
            ' 13 to specify a DSA container or 1 to specify
            ' an RSA container.  The default is 1.
            Dim cspParams As New
 CspParameters

            ' Specify the container name using the passed variable.
            cspParams.KeyContainerName = ContainerName

            'Create a new instance of RSACryptoServiceProvider. 
            'Pass the CspParameters class to use the 
            'key in the container.
            Dim RSAalg As New
 RSACryptoServiceProvider(cspParams)

            'Delete the key entry in the container.
            RSAalg.PersistKeyInCsp = False

            'Call Clear to release resources and delete the key from
 the container.
            RSAalg.Clear()

            'Indicate that the key was persisted.
            Console.WriteLine("The RSA key was deleted from the
 container, ""{0}"".",
 ContainerName)
        Catch e As CryptographicException
            Console.WriteLine(e.Message)
        End Try
    End Sub


    Function RSAEncrypt(ByVal DataToEncrypt()
 As Byte, ByVal ContainerName
 As String, ByVal DoOAEPPadding As Boolean) As Byte()
        Try
            ' Create a new instance of CspParameters.  Pass
            ' 13 to specify a DSA container or 1 to specify
            ' an RSA container.  The default is 1.
            Dim cspParams As New
 CspParameters

            ' Specify the container name using the passed variable.
            cspParams.KeyContainerName = ContainerName

            'Create a new instance of RSACryptoServiceProvider.
            'Pass the CspParameters class to use the key 
            'from the key in the container.
            Dim RSAalg As New
 RSACryptoServiceProvider(cspParams)

            'Encrypt the passed byte array and specify OAEP padding.
  
            'OAEP padding is only available on Microsoft Windows XP
 or
            'later.  
            Return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding)
            'Catch and display a CryptographicException  
            'to the console.
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return Nothing
        End Try
    End Function


    Function RSADecrypt(ByVal DataToDecrypt()
 As Byte, ByVal ContainerName
 As String, ByVal DoOAEPPadding As Boolean) As Byte()
        Try
            ' Create a new instance of CspParameters.  Pass
            ' 13 to specify a DSA container or 1 to specify
            ' an RSA container.  The default is 1.
            Dim cspParams As New
 CspParameters

            ' Specify the container name using the passed variable.
            cspParams.KeyContainerName = ContainerName

            'Create a new instance of RSACryptoServiceProvider.
            'Pass the CspParameters class to use the key 
            'from the key in the container.
            Dim RSAalg As New
 RSACryptoServiceProvider(cspParams)

            'Decrypt the passed byte array and specify OAEP padding.
  
            'OAEP padding is only available on Microsoft Windows XP
 or
            'later.  
            Return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding)
            'Catch and display a CryptographicException  
            'to the console.
        Catch e As CryptographicException
            Console.WriteLine(e.ToString())

            Return Nothing
        End Try
    End Function

End Module

using System;
using System.Security.Cryptography;
using System.Text;

class RSACSPSample
{

    static void Main()
    {
        try
        {
            string KeyContainerName = "MyKeyContainer";

            //Create a new key and persist it in 
            //the key container.
            RSAPersistKeyInCSP(KeyContainerName);

            //Create a UnicodeEncoder to convert between byte array
 and string.
            UnicodeEncoding ByteConverter = new UnicodeEncoding();

            //Create byte arrays to hold original, encrypted, and decrypted
 data.
            byte[] dataToEncrypt = ByteConverter.GetBytes("Data to Encrypt");
            byte[] encryptedData;
            byte[] decryptedData;

            //Pass the data to ENCRYPT, the name of the key container
,
            //and a boolean flag specifying no OAEP padding.
            encryptedData = RSAEncrypt(dataToEncrypt,KeyContainerName, false);

            //Pass the data to DECRYPT, the name of the key container
,
            //and a boolean flag specifying no OAEP padding.
            decryptedData = RSADecrypt(encryptedData,KeyContainerName, false);

            //Display the decrypted plaintext to the console. 
            Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));

            RSADeleteKeyInCSP(KeyContainerName);
        }
        catch(ArgumentNullException)
        {
            //Catch this exception in case the encryption did
            //not succeed.
            Console.WriteLine("Encryption failed.");

        }
    }

    public static void RSAPersistKeyInCSP(string
 ContainerName)
    {
        try
        {
            // Create a new instance of CspParameters.  Pass
            // 13 to specify a DSA container or 1 to specify
            // an RSA container.  The default is 1.
            CspParameters cspParams = new CspParameters();

            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = ContainerName;

            //Create a new instance of RSACryptoServiceProvider to generate
            //a new key pair.  Pass the CspParameters class to persist
 the 
            //key in the container.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);

            //Indicate that the key was persisted.
            Console.WriteLine("The RSA key was persisted in
 the container, \"{0}\".", ContainerName);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

        }
    }

    public static void RSADeleteKeyInCSP(string
 ContainerName)
    {
        try
        {
            // Create a new instance of CspParameters.  Pass
            // 13 to specify a DSA container or 1 to specify
            // an RSA container.  The default is 1.
            CspParameters cspParams = new CspParameters();

            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = ContainerName;

            //Create a new instance of RSACryptoServiceProvider. 
            //Pass the CspParameters class to use the 
            //key in the container.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);

            //Delete the key entry in the container.
            RSAalg.PersistKeyInCsp = false;

            //Call Clear to release resources and delete the key from
 the container.
            RSAalg.Clear();

            //Indicate that the key was persisted.
            Console.WriteLine("The RSA key was deleted from the container, \"{0}\".",
 ContainerName);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

        }
    }

    static public byte[] RSAEncrypt(byte[]
 DataToEncrypt, string ContainerName, bool
 DoOAEPPadding)
    {
        try
        {    
            // Create a new instance of CspParameters.  Pass
            // 13 to specify a DSA container or 1 to specify
            // an RSA container.  The default is 1.
            CspParameters cspParams = new CspParameters();

            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = ContainerName;

            //Create a new instance of RSACryptoServiceProvider.
            //Pass the CspParameters class to use the key 
            //from the key in the container.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);

            //Encrypt the passed byte array and specify OAEP padding.
  
            //OAEP padding is only available on Microsoft Windows XP
 or
            //later.  
            return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding);
        }
            //Catch and display a CryptographicException  
            //to the console.
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return null;
        }

    }

    static public byte[] RSADecrypt(byte[]
 DataToDecrypt, string ContainerName, bool
 DoOAEPPadding)
    {
        try
        {
            // Create a new instance of CspParameters.  Pass
            // 13 to specify a DSA container or 1 to specify
            // an RSA container.  The default is 1.
            CspParameters cspParams = new CspParameters();

            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = ContainerName;

            //Create a new instance of RSACryptoServiceProvider.
            //Pass the CspParameters class to use the key 
            //from the key in the container.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);

            //Decrypt the passed byte array and specify OAEP padding.
  
            //OAEP padding is only available on Microsoft Windows XP
 or
            //later.  
            return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding);
        }
            //Catch and display a CryptographicException  
            //to the console.
        catch(CryptographicException e)
        {
            Console.WriteLine(e.ToString());

            return null;
        }

    }
}

C++

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
void RSAPersistKeyInCSP( String^ ContainerName )
{
   try
   {
      
      // Create a new instance of CspParameters.  Pass
      // 13 to specify a DSA container or 1 to specify
      // an RSA container.  The default is 1.
      CspParameters^ cspParams = gcnew CspParameters;
      
      // Specify the container name using the passed variable.
      cspParams->KeyContainerName = ContainerName;
      
      //Create a new instance of RSACryptoServiceProvider to generate
      //a new key pair.  Pass the CspParameters class to persist the
 
      //key in the container.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( cspParams
 );
      
      //Indicate that the key was persisted.
      Console::WriteLine( "The RSA key was persisted in the
 container, \"{0}\".", ContainerName );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

void RSADeleteKeyInCSP( String^ ContainerName )
{
   try
   {
      
      // Create a new instance of CspParameters.  Pass
      // 13 to specify a DSA container or 1 to specify
      // an RSA container.  The default is 1.
      CspParameters^ cspParams = gcnew CspParameters;
      
      // Specify the container name using the passed variable.
      cspParams->KeyContainerName = ContainerName;
      
      //Create a new instance of RSACryptoServiceProvider. 
      //Pass the CspParameters class to use the 
      //key in the container.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( cspParams
 );
      
      //Delete the key entry in the container.
      RSAalg->PersistKeyInCsp = false;
      
      //Call Clear to release resources and delete the key from the
 container.
      RSAalg->Clear();
      
      //Indicate that the key was persisted.
      Console::WriteLine( "The RSA key was deleted from the container, \"{0}\".",
 ContainerName );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

array<Byte>^ RSAEncrypt( array<Byte>^DataToEncrypt, String^ ContainerName,
 bool DoOAEPPadding )
{
   try
   {
      
      // Create a new instance of CspParameters.  Pass
      // 13 to specify a DSA container or 1 to specify
      // an RSA container.  The default is 1.
      CspParameters^ cspParams = gcnew CspParameters;
      
      // Specify the container name using the passed variable.
      cspParams->KeyContainerName = ContainerName;
      
      //Create a new instance of RSACryptoServiceProvider.
      //Pass the CspParameters class to use the key 
      //from the key in the container.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( cspParams
 );
      
      //Encrypt the passed byte array and specify OAEP padding.  
      //OAEP padding is only available on Microsoft Windows XP or
      //later.  
      return RSAalg->Encrypt( DataToEncrypt, DoOAEPPadding
 );
   }
   //Catch and display a CryptographicException  
   //to the console.
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return nullptr;
   }

}

array<Byte>^ RSADecrypt( array<Byte>^DataToDecrypt, String^ ContainerName,
 bool DoOAEPPadding )
{
   try
   {
      
      // Create a new instance of CspParameters.  Pass
      // 13 to specify a DSA container or 1 to specify
      // an RSA container.  The default is 1.
      CspParameters^ cspParams = gcnew CspParameters;
      
      // Specify the container name using the passed variable.
      cspParams->KeyContainerName = ContainerName;
      
      //Create a new instance of RSACryptoServiceProvider.
      //Pass the CspParameters class to use the key 
      //from the key in the container.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( cspParams
 );
      
      //Decrypt the passed byte array and specify OAEP padding.  
      //OAEP padding is only available on Microsoft Windows XP or
      //later.  
      return RSAalg->Decrypt( DataToDecrypt, DoOAEPPadding
 );
   }
   //Catch and display a CryptographicException  
   //to the console.
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e );
      return nullptr;
   }

}

int main()
{
   try
   {
      String^ KeyContainerName = "MyKeyContainer";
      
      //Create a new key and persist it in 
      //the key container.
      RSAPersistKeyInCSP( KeyContainerName );
      
      //Create a UnicodeEncoder to convert between byte array and string.
      UnicodeEncoding^ ByteConverter = gcnew UnicodeEncoding;
      
      //Create byte arrays to hold original, encrypted, and decrypted
 data.
      array<Byte>^dataToEncrypt = ByteConverter->GetBytes( "Data to
 Encrypt" );
      array<Byte>^encryptedData;
      array<Byte>^decryptedData;
      
      //Pass the data to ENCRYPT, the name of the key container,
      //and a boolean flag specifying no OAEP padding.
      encryptedData = RSAEncrypt( dataToEncrypt, KeyContainerName, false
 );
      
      //Pass the data to DECRYPT, the name of the key container,
      //and a boolean flag specifying no OAEP padding.
      decryptedData = RSADecrypt( encryptedData, KeyContainerName, false
 );
      
      //Display the decrypted plaintext to the console. 
      Console::WriteLine( "Decrypted plaintext: {0}", ByteConverter->GetString(
 decryptedData ) );
      RSADeleteKeyInCSP( KeyContainerName );
   }
   catch ( ArgumentNullException^ ) 
   {
      
      //Catch this exception in case the encryption did
      //not succeed.
      Console::WriteLine( "Encryption failed." );
   }

}

import System.*;
import System.Security.Cryptography.*;
import System.Text.*;

class RSACSPSample
{
    public static void main(String[]
 args)
    {
        try {
            String keyContainerName = "MyKeyContainer";

            // Create a new key and persist it in 
            // the key container.
            RSAPersistKeyInCSP(keyContainerName);

            // Create a UnicodeEncoder to convert between byte array
 and string.
            UnicodeEncoding byteConverter = new UnicodeEncoding();

            // Create byte arrays to hold original, encrypted, and decrypted
 
            // data.
            ubyte dataToEncrypt[] = byteConverter.GetBytes("Data to Encrypt");
            ubyte encryptedData[];
            ubyte decryptedData[];

            // Pass the data to ENCRYPT, the name of the key container
,
            // and a boolean flag specifying no OAEP padding.
            encryptedData = RSAEncrypt(dataToEncrypt, keyContainerName, false);

            // Pass the data to DECRYPT, the name of the key container
,
            // and a boolean flag specifying no OAEP padding.
            decryptedData = RSADecrypt(encryptedData, keyContainerName, false);

            // Display the decrypted plaintext to the console. 
            Console.WriteLine("Decrypted plaintext: {0}", 
                byteConverter.GetString(decryptedData));
            RSADeleteKeyInCSP(keyContainerName);
        }
        catch (ArgumentNullException exp) {
            // Catch this exception in case the encryption did
            // not succeed.
            Console.WriteLine("Encryption failed.");
        }
    } //main

    public static void RSAPersistKeyInCSP(String
 containerName)
    {
        try {
            // Create a new instance of CspParameters.  Pass
            // 13 to specify a DSA container or 1 to specify
            // an RSA container.  The default is 1.
            CspParameters cspParams = new CspParameters();

            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = containerName;

            // Create a new instance of RSACryptoServiceProvider to
 generate
            // a new key pair.  Pass the CspParameters class to persist
 the 
            // key in the container.
            RSACryptoServiceProvider rsaAlg = 
                new RSACryptoServiceProvider(cspParams);

            // Indicate that the key was persisted.
            Console.WriteLine("The RSA key was persisted in
 the container, "
                + "\"{0}\".", containerName);
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
        }
    } //RSAPersistKeyInCSP

    public static void RSADeleteKeyInCSP(String
 containerName)
    {
        try {
            // Create a new instance of CspParameters.  Pass
            // 13 to specify a DSA container or 1 to specify
            // an RSA container.  The default is 1.
            CspParameters cspParams = new CspParameters();

            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = containerName;

            // Create a new instance of RSACryptoServiceProvider. 
            // Pass the CspParameters class to use the 
            // key in the container.
            RSACryptoServiceProvider rsaAlg = 
                new RSACryptoServiceProvider(cspParams);

            // Delete the key entry in the container.
            rsaAlg.set_PersistKeyInCsp(false);

            // Call Clear to release resources and delete the key from
 the 
            // container.
            rsaAlg.Clear();

            // Indicate that the key was persisted.
            Console.WriteLine("The RSA key was deleted from the container, "
                + "\"{0}\".", containerName);
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
        }
    } //RSADeleteKeyInCSP

    public static ubyte[] RSAEncrypt(ubyte[]
 dataToEncrypt, 
        String containerName, boolean doOAEPPadding)
    {
        try {
            // Create a new instance of CspParameters.  Pass
            // 13 to specify a DSA container or 1 to specify
            // an RSA container.  The default is 1.
            CspParameters cspParams = new CspParameters();

            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = containerName;

            // Create a new instance of RSACryptoServiceProvider.
            // Pass the CspParameters class to use the key 
            // from the key in the container.
            RSACryptoServiceProvider rsaAlg = 
                new RSACryptoServiceProvider(cspParams);

            // Encrypt the passed byte array and specify OAEP padding.
  
            // OAEP padding is only available on Microsoft Windows XP
 or
            // later.  
            return rsaAlg.Encrypt(dataToEncrypt, doOAEPPadding);
        }
            // Catch and display a CryptographicException  
            // to the console.
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
            return null;
        }
    } //RSAEncrypt

    public static ubyte[] RSADecrypt(ubyte
 dataToDecrypt[], 
        String containerName, boolean doOAEPPadding)
    {
        try {
            // Create a new instance of CspParameters.  Pass
            // 13 to specify a DSA container or 1 to specify
            // an RSA container.  The default is 1.
            CspParameters cspParams = new CspParameters();

            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = containerName;

            // Create a new instance of RSACryptoServiceProvider.
            // Pass the CspParameters class to use the key 
            // from the key in the container.
            RSACryptoServiceProvider rsaAlg = 
                new RSACryptoServiceProvider(cspParams);

            // Decrypt the passed byte array and specify OAEP padding.
  
            // OAEP padding is only available on Microsoft Windows XP
 or
            // later.  
            return rsaAlg.Decrypt(dataToDecrypt, doOAEPPadding);
        }
            // Catch and display a CryptographicException  
            // to the console.
        catch (CryptographicException e) {
            Console.WriteLine(e.ToString());
            return null;
        }
    } //RSADecrypt
} //RSACSPSample

.NET Framework のセキュリティ

SecurityPermission (アンマネージコードを呼び出すために必要なアクセス許可)。SecurityPermissionFlag.UnmanagedCode (関連する列挙体)。

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
.NET Compact Framework
サポート対象 : 2.0

参照

関連項目
RSACryptoServiceProvider クラス
RSACryptoServiceProvider メンバ
System.Security.Cryptography 名前空間
その他の技術情報
暗号サービス

RSACryptoServiceProvider コンストラクタ (Int32, CspParameters)

キーサイズとパラメータを指定して、RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。

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

Visual Basic (宣言)

Public Sub New ( _
    dwKeySize As Integer, _
    parameters As CspParameters _
)

Visual Basic (使用法)

Dim dwKeySize As Integer
Dim parameters As CspParameters

Dim instance As New RSACryptoServiceProvider(dwKeySize,
 parameters)

public RSACryptoServiceProvider (
    int dwKeySize,
    CspParameters parameters
)

C++

public:
RSACryptoServiceProvider (
    int dwKeySize, 
    CspParameters^ parameters
)

public RSACryptoServiceProvider (
    int dwKeySize, 
    CspParameters parameters
)

JScript

public function RSACryptoServiceProvider (
    dwKeySize : int, 
    parameters : CspParameters
)

パラメータ

dwKeySize: 使用するキーのサイズ (ビット単位)。

parameters: 暗号サービスプロバイダ (CSP) に渡すパラメータ。

例外

例外の種類	条件
CryptographicException	CSP を取得できません。またはキーを作成できません。

例外の種類

条件

CryptographicException

CSP を取得できません。

または

キーを作成できません。

解説

このコンストラクタは、parameters パラメータの KeyContainerName フィールドを使用して指定したキーコンテナを作成または再利用します。

(デジタル署名済みの) メッセージまたはファイルの認証に適した Signature キーペアを作成するには、parameters パラメータの KeyNumber フィールドの値を Signature に設定します。この種類のキーは、CAPI で使用される AT_SIGNATURE 値に対応します。

RSACryptoServiceProvider クラスを使用して厳密な名前の署名と互換性のあるキーを作成するには、Signature キーペアを作成する必要があります。

使用例

RSACryptoServiceProvider を作成し、新しいキーを生成して、このキーをキーコンテナ内に格納するコード例を次に示します。

Visual Basic

Imports System.Security.Cryptography
Imports System.Text

Module RSACSPExample

    Sub Main()
        Try
            Dim KeyContainerName As String
 = "MyKeyContainer"

            'Create a new key and persist it in 
            'the key container.
            RSAPersistKeyInCSP(KeyContainerName)

            'Create a UnicodeEncoder to convert between byte array and
 string.
            Dim ByteConverter As New
 UnicodeEncoding

            'Create byte arrays to hold original, encrypted, and decrypted
 data.
            Dim dataToEncrypt As Byte()
 = ByteConverter.GetBytes("Data to Encrypt")
            Dim encryptedData() As Byte
            Dim decryptedData() As Byte

            'Pass the data to ENCRYPT, the name of the key container,
 
            'and a boolean flag specifying no OAEP padding.
            encryptedData = RSAEncrypt(dataToEncrypt, KeyContainerName, False)

            'Pass the data to DECRYPT, the name of the key container,
 
            'and a boolean flag specifying no OAEP padding.
            decryptedData = RSADecrypt(encryptedData, KeyContainerName, False)

            'Display the decrypted plaintext to the console. 
            Console.WriteLine("Decrypted plaintext: {0}",
 ByteConverter.GetString(decryptedData))

            RSADeleteKeyInCSP(KeyContainerName)
        Catch e As ArgumentNullException
            'Catch this exception in case the encryption did
            'not succeed.
            Console.WriteLine("Encryption failed.")
        End Try
    End Sub


    Sub RSAPersistKeyInCSP(ByVal ContainerName
 As String)
        Try
            ' Create a new instance of CspParameters.  Pass
            ' 13 to specify a DSA container or 1 to specify
            ' an RSA container.  The default is 1.
            Dim cspParams As New
 CspParameters

            ' Specify the container name using the passed variable.
            cspParams.KeyContainerName = ContainerName

            'Create a new instance of RSACryptoServiceProvider to generate
            'a new key pair.  Pass the CspParameters class to persist
 the 
            'key in the container.
            Dim RSAalg As New
 RSACryptoServiceProvider(2048, cspParams)

            'Indicate that the key was persisted.
            Console.WriteLine("The RSA key with a key-size of
 {0} was persisted in the container, ""{1}"".",
 _
                              RSAalg.KeySize, ContainerName)
        Catch e As CryptographicException
            Console.WriteLine(e.Message)
        End Try
    End Sub


    Sub RSADeleteKeyInCSP(ByVal ContainerName
 As String)
        Try
            ' Create a new instance of CspParameters.  Pass
            ' 13 to specify a DSA container or 1 to specify
            ' an RSA container.  The default is 1.
            Dim cspParams As New
 CspParameters

            ' Specify the container name using the passed variable.
            cspParams.KeyContainerName = ContainerName

            'Create a new instance of RSACryptoServiceProvider. 
            'Pass the CspParameters class to use the 
            'key in the container.
            Dim RSAalg As New
 RSACryptoServiceProvider(cspParams)

            'Delete the key entry in the container.
            RSAalg.PersistKeyInCsp = False

            'Call Clear to release resources and delete the key from
 the container.
            RSAalg.Clear()

            'Indicate that the key was persisted.
            Console.WriteLine("The RSA key was deleted from the
 container, ""{0}"".",
 ContainerName)
        Catch e As CryptographicException
            Console.WriteLine(e.Message)
        End Try
    End Sub


    Function RSAEncrypt(ByVal DataToEncrypt()
 As Byte, ByVal ContainerName
 As String, ByVal DoOAEPPadding As Boolean) As Byte()
        Try
            ' Create a new instance of CspParameters.  Pass
            ' 13 to specify a DSA container or 1 to specify
            ' an RSA container.  The default is 1.
            Dim cspParams As New
 CspParameters

            ' Specify the container name using the passed variable.
            cspParams.KeyContainerName = ContainerName

            'Create a new instance of RSACryptoServiceProvider.
            'Pass the CspParameters class to use the key 
            'from the key in the container.
            Dim RSAalg As New
 RSACryptoServiceProvider(cspParams)

            'Encrypt the passed byte array and specify OAEP padding.
  
            'OAEP padding is only available on Microsoft Windows XP
 or
            'later.  
            Return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding)
            'Catch and display a CryptographicException  
            'to the console.
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return Nothing
        End Try
    End Function


    Function RSADecrypt(ByVal DataToDecrypt()
 As Byte, ByVal ContainerName
 As String, ByVal DoOAEPPadding As Boolean) As Byte()
        Try
            ' Create a new instance of CspParameters.  Pass
            ' 13 to specify a DSA container or 1 to specify
            ' an RSA container.  The default is 1.
            Dim cspParams As New
 CspParameters

            ' Specify the container name using the passed variable.
            cspParams.KeyContainerName = ContainerName

            'Create a new instance of RSACryptoServiceProvider.
            'Pass the CspParameters class to use the key 
            'from the key in the container.
            Dim RSAalg As New
 RSACryptoServiceProvider(cspParams)

            'Decrypt the passed byte array and specify OAEP padding.
  
            'OAEP padding is only available on Microsoft Windows XP
 or
            'later.  
            Return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding)
            'Catch and display a CryptographicException  
            'to the console.
        Catch e As CryptographicException
            Console.WriteLine(e.ToString())

            Return Nothing
        End Try
    End Function

End Module

using System;
using System.Security.Cryptography;
using System.Text;

class RSACSPSample
{

    static void Main()
    {
        try
        {
            string KeyContainerName = "MyKeyContainer";

            //Create a new key and persist it in 
            //the key container.
            RSAPersistKeyInCSP(KeyContainerName);

            //Create a UnicodeEncoder to convert between byte array
 and string.
            UnicodeEncoding ByteConverter = new UnicodeEncoding();

            //Create byte arrays to hold original, encrypted, and decrypted
 data.
            byte[] dataToEncrypt = ByteConverter.GetBytes("Data to Encrypt");
            byte[] encryptedData;
            byte[] decryptedData;

            //Pass the data to ENCRYPT, the name of the key container
,
            //and a boolean flag specifying no OAEP padding.
            encryptedData = RSAEncrypt(dataToEncrypt,KeyContainerName, false);

            //Pass the data to DECRYPT, the name of the key container
,
            //and a boolean flag specifying no OAEP padding.
            decryptedData = RSADecrypt(encryptedData,KeyContainerName, false);

            //Display the decrypted plaintext to the console. 
            Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));

            RSADeleteKeyInCSP(KeyContainerName);
        }
        catch(ArgumentNullException)
        {
            //Catch this exception in case the encryption did
            //not succeed.
            Console.WriteLine("Encryption failed.");

        }
    }

    public static void RSAPersistKeyInCSP(string
 ContainerName)
    {
        try
        {
            // Create a new instance of CspParameters.  Pass
            // 13 to specify a DSA container or 1 to specify
            // an RSA container.  The default is 1.
            CspParameters cspParams = new CspParameters();

            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = ContainerName;

            //Create a new instance of RSACryptoServiceProvider to generate
            //a new key pair.  Pass the CspParameters class to persist
 the 
            //key in the container.  Pass an intger of 2048 to specify
 the 
            //key-size.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(
 2048, cspParams);

            //Indicate that the key was persisted.
            Console.WriteLine("The RSA key with a key-size of {0} was persisted
 in the container, \"{1}\".", 
                              RSAalg.KeySize , ContainerName);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

        }
    }

    public static void RSADeleteKeyInCSP(string
 ContainerName)
    {
        try
        {
            // Create a new instance of CspParameters.  Pass
            // 13 to specify a DSA container or 1 to specify
            // an RSA container.  The default is 1.
            CspParameters cspParams = new CspParameters();

            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = ContainerName;

            //Create a new instance of DSACryptoServiceProvider. 
            //Pass the CspParameters class to use the 
            //key in the container.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);

            //Delete the key entry in the container.
            RSAalg.PersistKeyInCsp = false;

            //Call Clear to release resources and delete the key from
 the container.
            RSAalg.Clear();

            //Indicate that the key was persisted.
            Console.WriteLine("The RSA key was deleted from the container, \"{0}\".",
 ContainerName);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

        }
    }

    static public byte[] RSAEncrypt(byte[]
 DataToEncrypt, string ContainerName, bool
 DoOAEPPadding)
    {
        try
        {    
            // Create a new instance of CspParameters.  Pass
            // 13 to specify a DSA container or 1 to specify
            // an RSA container.  The default is 1.
            CspParameters cspParams = new CspParameters();

            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = ContainerName;

            //Create a new instance of DSACryptoServiceProvider.
            //Pass the CspParameters class to use the key 
            //from the key in the container.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);

            //Encrypt the passed byte array and specify OAEP padding.
  
            //OAEP padding is only available on Microsoft Windows XP
 or
            //later.  
            return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding);
        }
            //Catch and display a CryptographicException  
            //to the console.
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return null;
        }

    }

    static public byte[] RSADecrypt(byte[]
 DataToDecrypt, string ContainerName, bool
 DoOAEPPadding)
    {
        try
        {
            // Create a new instance of CspParameters.  Pass
            // 13 to specify a DSA container or 1 to specify
            // an RSA container.  The default is 1.
            CspParameters cspParams = new CspParameters();

            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = ContainerName;

            //Create a new instance of DSACryptoServiceProvider.
            //Pass the CspParameters class to use the key 
            //from the key in the container.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);

            //Decrypt the passed byte array and specify OAEP padding.
  
            //OAEP padding is only available on Microsoft Windows XP
 or
            //later.  
            return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding);
        }
            //Catch and display a CryptographicException  
            //to the console.
        catch(CryptographicException e)
        {
            Console.WriteLine(e.ToString());

            return null;
        }

    }
}

C++

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
void RSAPersistKeyInCSP( String^ ContainerName )
{
   try
   {
      
      // Create a new instance of CspParameters.  Pass
      // 13 to specify a DSA container or 1 to specify
      // an RSA container.  The default is 1.
      CspParameters^ cspParams = gcnew CspParameters;
      
      // Specify the container name using the passed variable.
      cspParams->KeyContainerName = ContainerName;
      
      //Create a new instance of RSACryptoServiceProvider to generate
      //a new key pair.  Pass the CspParameters class to persist the
 
      //key in the container.  Pass an intger of 2048 to specify the
 
      //key-size.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( 2048,cspParams
 );
      
      //Indicate that the key was persisted.
      Console::WriteLine( "The RSA key with a key-size of {0} was persisted
 in the container, \"{1}\".", RSAalg->KeySize,
 ContainerName );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

void RSADeleteKeyInCSP( String^ ContainerName )
{
   try
   {
      
      // Create a new instance of CspParameters.  Pass
      // 13 to specify a DSA container or 1 to specify
      // an RSA container.  The default is 1.
      CspParameters^ cspParams = gcnew CspParameters;
      
      // Specify the container name using the passed variable.
      cspParams->KeyContainerName = ContainerName;
      
      //Create a new instance of DSACryptoServiceProvider. 
      //Pass the CspParameters class to use the 
      //key in the container.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( cspParams
 );
      
      //Delete the key entry in the container.
      RSAalg->PersistKeyInCsp = false;
      
      //Call Clear to release resources and delete the key from the
 container.
      RSAalg->Clear();
      
      //Indicate that the key was persisted.
      Console::WriteLine( "The RSA key was deleted from the container, \"{0}\".",
 ContainerName );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

array<Byte>^ RSAEncrypt( array<Byte>^DataToEncrypt, String^ ContainerName,
 bool DoOAEPPadding )
{
   try
   {
      
      // Create a new instance of CspParameters.  Pass
      // 13 to specify a DSA container or 1 to specify
      // an RSA container.  The default is 1.
      CspParameters^ cspParams = gcnew CspParameters;
      
      // Specify the container name using the passed variable.
      cspParams->KeyContainerName = ContainerName;
      
      //Create a new instance of DSACryptoServiceProvider.
      //Pass the CspParameters class to use the key 
      //from the key in the container.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( cspParams
 );
      
      //Encrypt the passed byte array and specify OAEP padding.  
      //OAEP padding is only available on Microsoft Windows XP or
      //later.  
      return RSAalg->Encrypt( DataToEncrypt, DoOAEPPadding
 );
   }
   //Catch and display a CryptographicException  
   //to the console.
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return nullptr;
   }

}

array<Byte>^ RSADecrypt( array<Byte>^DataToDecrypt, String^ ContainerName,
 bool DoOAEPPadding )
{
   try
   {
      
      // Create a new instance of CspParameters.  Pass
      // 13 to specify a DSA container or 1 to specify
      // an RSA container.  The default is 1.
      CspParameters^ cspParams = gcnew CspParameters;
      
      // Specify the container name using the passed variable.
      cspParams->KeyContainerName = ContainerName;
      
      //Create a new instance of DSACryptoServiceProvider.
      //Pass the CspParameters class to use the key 
      //from the key in the container.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( cspParams
 );
      
      //Decrypt the passed byte array and specify OAEP padding.  
      //OAEP padding is only available on Microsoft Windows XP or
      //later.  
      return RSAalg->Decrypt( DataToDecrypt, DoOAEPPadding
 );
   }
   //Catch and display a CryptographicException  
   //to the console.
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e );
      return nullptr;
   }

}

int main()
{
   try
   {
      String^ KeyContainerName = "MyKeyContainer";
      
      //Create a new key and persist it in 
      //the key container.
      RSAPersistKeyInCSP( KeyContainerName );
      
      //Create a UnicodeEncoder to convert between byte array and string.
      UnicodeEncoding^ ByteConverter = gcnew UnicodeEncoding;
      
      //Create byte arrays to hold original, encrypted, and decrypted
 data.
      array<Byte>^dataToEncrypt = ByteConverter->GetBytes( "Data to
 Encrypt" );
      array<Byte>^encryptedData;
      array<Byte>^decryptedData;
      
      //Pass the data to ENCRYPT, the name of the key container,
      //and a boolean flag specifying no OAEP padding.
      encryptedData = RSAEncrypt( dataToEncrypt, KeyContainerName, false
 );
      
      //Pass the data to DECRYPT, the name of the key container,
      //and a boolean flag specifying no OAEP padding.
      decryptedData = RSADecrypt( encryptedData, KeyContainerName, false
 );
      
      //Display the decrypted plaintext to the console. 
      Console::WriteLine( "Decrypted plaintext: {0}", ByteConverter->GetString(
 decryptedData ) );
      RSADeleteKeyInCSP( KeyContainerName );
   }
   catch ( ArgumentNullException^ ) 
   {
      
      //Catch this exception in case the encryption did
      //not succeed.
      Console::WriteLine( "Encryption failed." );
   }

}

import System.*;
import System.Security.Cryptography.*;
import System.Text.*;

class RSACSPSample
{
    public static void main(String[]
 args)
    {
        try {
            String keyContainerName = "MyKeyContainer";

            // Create a new key and persist it in 
            // the key container.
            RSAPersistKeyInCSP(keyContainerName);

            // Create a UnicodeEncoder to convert between byte array
 and string.
            UnicodeEncoding byteConverter = new UnicodeEncoding();

            // Create byte arrays to hold original, encrypted, and decrypted
 
            // data.
            ubyte dataToEncrypt[] = byteConverter.GetBytes("Data to Encrypt");
            ubyte encryptedData[];
            ubyte decryptedData[];

            // Pass the data to ENCRYPT, the name of the key container
,
            // and a boolean flag specifying no OAEP padding.
            encryptedData = RSAEncrypt(dataToEncrypt, keyContainerName, false);

            // Pass the data to DECRYPT, the name of the key container
,
            // and a boolean flag specifying no OAEP padding.
            decryptedData = RSADecrypt(encryptedData, keyContainerName, false);

            // Display the decrypted plaintext to the console. 
            Console.WriteLine("Decrypted plaintext: {0}", 
                byteConverter.GetString(decryptedData));
            RSADeleteKeyInCSP(keyContainerName);
        }
        catch (ArgumentNullException exp) {
            // Catch this exception in case the encryption did
            // not succeed.
            Console.WriteLine("Encryption failed.");
        }
    } //main

    public static void RSAPersistKeyInCSP(String
 containerName)
    {
        try {
            // Create a new instance of CspParameters.  Pass
            // 13 to specify a DSA container or 1 to specify
            // an RSA container.  The default is 1.
            CspParameters cspParams = new CspParameters();

            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = containerName;

            // Create a new instance of RSACryptoServiceProvider to
 generate
            // a new key pair.  Pass the CspParameters class to persist
 the 
            // key in the container.  Pass an intger of 2048 to specify
 the 
            // key-size.
            RSACryptoServiceProvider rsaAlg = 
                new RSACryptoServiceProvider(2048, cspParams);

            // Indicate that the key was persisted.
            Console.WriteLine("The RSA key with a key-size of {0} was "
                + "persisted in the container, \"{1}\".",
 
                System.Convert.ToString(rsaAlg.get_KeySize()), containerName);
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
        }
    } //RSAPersistKeyInCSP

    public static void RSADeleteKeyInCSP(String
 containerName)
    {
        try {
            // Create a new instance of CspParameters.  Pass
            // 13 to specify a DSA container or 1 to specify
            // an RSA container.  The default is 1.
            CspParameters cspParams = new CspParameters();

            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = containerName;

            // Create a new instance of DSACryptoServiceProvider. 
            // Pass the CspParameters class to use the 
            // key in the container.
            RSACryptoServiceProvider rsaAlg = 
                new RSACryptoServiceProvider(cspParams);

            // Delete the key entry in the container.
            rsaAlg.set_PersistKeyInCsp(false);

            // Call Clear to release resources and delete the key from
 
            // the container.
            rsaAlg.Clear();

            // Indicate that the key was persisted.
            Console.WriteLine("The RSA key was deleted from the container, "
                + "\"{0}\".", containerName);
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
        }
    } //RSADeleteKeyInCSP

    public static ubyte[] RSAEncrypt(ubyte
 dataToEncrypt[], 
        String containerName, boolean doOAEPPadding)
    {
        try {
            // Create a new instance of CspParameters.  Pass
            // 13 to specify a DSA container or 1 to specify
            // an RSA container.  The default is 1.
            CspParameters cspParams = new CspParameters();

            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = containerName;

            // Create a new instance of DSACryptoServiceProvider.
            // Pass the CspParameters class to use the key 
            // from the key in the container.
            RSACryptoServiceProvider rsaAlg = 
                new RSACryptoServiceProvider(cspParams);

            // Encrypt the passed byte array and specify OAEP padding.
  
            // OAEP padding is only available on Microsoft Windows XP
 or
            // later.  
            return rsaAlg.Encrypt(dataToEncrypt, doOAEPPadding);
        }
        // Catch and display a CryptographicException  
        // to the console.
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
            return null;
        }
    } //RSAEncrypt

    public static ubyte[] RSADecrypt(ubyte[]
 dataToDecrypt, 
        String containerName, boolean doOAEPPadding)
    {
        try {
            // Create a new instance of CspParameters.  Pass
            // 13 to specify a DSA container or 1 to specify
            // an RSA container.  The default is 1.
            CspParameters cspParams = new CspParameters();

            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = containerName;

            // Create a new instance of DSACryptoServiceProvider.
            // Pass the CspParameters class to use the key 
            // from the key in the container.
            RSACryptoServiceProvider rsaAlg = 
                new RSACryptoServiceProvider(cspParams);

            // Decrypt the passed byte array and specify OAEP padding.
  
            // OAEP padding is only available on Microsoft Windows XP
 or
            // later.  
            return rsaAlg.Decrypt(dataToDecrypt, doOAEPPadding);
        }
        // Catch and display a CryptographicException  
        // to the console.
        catch (CryptographicException e) {
            Console.WriteLine(e.ToString());
            return null;
        }
    } //RSADecrypt
} //RSACSPSample

.NET Framework のセキュリティ

SecurityPermission (アンマネージコードを呼び出すために必要なアクセス許可)。SecurityPermissionFlag.UnmanagedCode (関連する列挙体)。

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
.NET Compact Framework
サポート対象 : 2.0

参照

関連項目
RSACryptoServiceProvider クラス
RSACryptoServiceProvider メンバ
System.Security.Cryptography 名前空間
その他の技術情報
暗号サービス

RSACryptoServiceProvider コンストラクタ

RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。
オーバーロードの一覧

名前	説明
RSACryptoServiceProvider ()	既定のキーを使用して、RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。 .NET Compact Framework によってサポートされています。
RSACryptoServiceProvider (CspParameters)	指定したパラメータを使用して、RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。 .NET Compact Framework によってサポートされています。
RSACryptoServiceProvider (Int32)	キーのサイズを指定して、RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。 .NET Compact Framework によってサポートされています。
RSACryptoServiceProvider (Int32, CspParameters)	キーサイズとパラメータを指定して、RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。 .NET Compact Framework によってサポートされています。

参照

その他の技術情報

暗号サービス

RSACryptoServiceProvider コンストラクタ (Int32)

キーのサイズを指定して、RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。

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

Visual Basic (宣言)

Public Sub New ( _
    dwKeySize As Integer _
)

Visual Basic (使用法)

Dim dwKeySize As Integer

Dim instance As New RSACryptoServiceProvider(dwKeySize)

public RSACryptoServiceProvider (
    int dwKeySize
)

C++

public:
RSACryptoServiceProvider (
    int dwKeySize
)

public RSACryptoServiceProvider (
    int dwKeySize
)

JScript

public function RSACryptoServiceProvider (
    dwKeySize : int
)

パラメータ

dwKeySize: 使用するキーのサイズ (ビット単位)。

例外

例外の種類	条件
CryptographicException	暗号サービスプロバイダ (CSP) を取得できません。

解説

既定のキーが見つからない場合は、新しいキーが作成されます。

使用例

RSACryptoServiceProvider を作成し、新しいキーを生成して、このキーをキーコンテナ内に格納するコード例を次に示します。

Visual Basic

Imports System.Security.Cryptography
Imports System.Text

Module RSACSPExample

    Sub Main()
        Try
            'Create a UnicodeEncoder to convert between byte array and
 string.
            Dim ByteConverter As New
 UnicodeEncoding

            'Create byte arrays to hold original, encrypted, and decrypted
 data.
            Dim dataToEncrypt As Byte()
 = ByteConverter.GetBytes("Data to Encrypt")
            Dim encryptedData() As Byte
            Dim decryptedData() As Byte

            'Create a new instance of RSACryptoServiceProvider to generate
            'public and private key data.  Pass an integer specifying
 a key-
            'length of 2048.
            Dim RSAalg As New
 RSACryptoServiceProvider(2048)

            'Display the key-legth to the console.
            Console.WriteLine("A new key pair of legth {0} was
 created", RSAalg.KeySize)

            'Pass the data to ENCRYPT, the public key information 
            '(using RSACryptoServiceProvider.ExportParameters(false)
,
            'and a boolean flag specifying no OAEP padding.
            encryptedData = RSAEncrypt(dataToEncrypt, RSAalg.ExportParameters(False),
 False)

            'Pass the data to DECRYPT, the private key information 
            '(using RSACryptoServiceProvider.ExportParameters(true)
,
            'and a boolean flag specifying no OAEP padding.
            decryptedData = RSADecrypt(encryptedData, RSAalg.ExportParameters(True),
 False)

            'Display the decrypted plaintext to the console. 
            Console.WriteLine("Decrypted plaintext: {0}",
 ByteConverter.GetString(decryptedData))
        Catch e As ArgumentNullException
            'Catch this exception in case the encryption did
            'not succeed.
            Console.WriteLine("Encryption failed.")
        End Try
    End Sub 'Main


    Function RSAEncrypt(ByVal DataToEncrypt()
 As Byte, ByVal RSAKeyInfo
 As RSAParameters, ByVal DoOAEPPadding As Boolean) As Byte()
        Try
            'Create a new instance of RSACryptoServiceProvider.
            Dim RSAalg As New
 RSACryptoServiceProvider

            'Import the RSA Key information. This only needs
            'toinclude the public key information.
            RSAalg.ImportParameters(RSAKeyInfo)

            'Encrypt the passed byte array and specify OAEP padding.
  
            'OAEP padding is only available on Microsoft Windows XP
 or
            'later.  
            Return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding)
            'Catch and display a CryptographicException  
            'to the console.
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return Nothing
        End Try
    End Function 


    Function RSADecrypt(ByVal DataToDecrypt()
 As Byte, ByVal RSAKeyInfo
 As RSAParameters, ByVal DoOAEPPadding As Boolean) As Byte()
        Try
            'Create a new instance of RSACryptoServiceProvider.
            Dim RSAalg As New
 RSACryptoServiceProvider

            'Import the RSA Key information. This needs
            'to include the private key information.
            RSAalg.ImportParameters(RSAKeyInfo)

            'Decrypt the passed byte array and specify OAEP padding.
  
            'OAEP padding is only available on Microsoft Windows XP
 or
            'later.  
            Return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding)
            'Catch and display a CryptographicException  
            'to the console.
        Catch e As CryptographicException
            Console.WriteLine(e.ToString())

            Return Nothing
        End Try
    End Function  

End Module

using System;
using System.Security.Cryptography;
using System.Text;

class RSACSPSample
{

    static void Main()
    {
        try
        {
            //Create a UnicodeEncoder to convert between byte array
 and string.
            UnicodeEncoding ByteConverter = new UnicodeEncoding();

            //Create byte arrays to hold original, encrypted, and decrypted
 data.
            byte[] dataToEncrypt = ByteConverter.GetBytes("Data to Encrypt");
            byte[] encryptedData;
            byte[] decryptedData;
            
            //Create a new instance of RSACryptoServiceProvider to generate
            //public and private key data.  Pass an integer specifying
 a key-
            //length of 2048.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(2048);

            //Display the key-legth to the console.
            Console.WriteLine("A new key pair of legth {0}
 was created", RSAalg.KeySize);

            //Pass the data to ENCRYPT, the public key information 
            //(using RSACryptoServiceProvider.ExportParameters(false)
,
            //and a boolean flag specifying no OAEP padding.
            encryptedData = RSAEncrypt(dataToEncrypt,RSAalg.ExportParameters(false),
 false);

            //Pass the data to DECRYPT, the private key information
 
            //(using RSACryptoServiceProvider.ExportParameters(true)
,
            //and a boolean flag specifying no OAEP padding.
            decryptedData = RSADecrypt(encryptedData,RSAalg.ExportParameters(true),
 false);

            //Display the decrypted plaintext to the console. 
            Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));
        }
        catch(ArgumentNullException)
        {
            //Catch this exception in case the encryption did
            //not succeed.
            Console.WriteLine("Encryption failed.");

        }
    }

    static public byte[] RSAEncrypt(byte[]
 DataToEncrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding)
    {
        try
        {    
            //Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();

            //Import the RSA Key information. This only needs
            //toinclude the public key information.
            RSAalg.ImportParameters(RSAKeyInfo);

            //Encrypt the passed byte array and specify OAEP padding.
  
            //OAEP padding is only available on Microsoft Windows XP
 or
            //later.  
            return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding);
        }
            //Catch and display a CryptographicException  
            //to the console.
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return null;
        }

    }

    static public byte[] RSADecrypt(byte[]
 DataToDecrypt, RSAParameters RSAKeyInfo,bool DoOAEPPadding)
    {
        try
        {
            //Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();

            //Import the RSA Key information. This needs
            //to include the private key information.
            RSAalg.ImportParameters(RSAKeyInfo);

            //Decrypt the passed byte array and specify OAEP padding.
  
            //OAEP padding is only available on Microsoft Windows XP
 or
            //later.  
            return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding);
        }
            //Catch and display a CryptographicException  
            //to the console.
        catch(CryptographicException e)
        {
            Console.WriteLine(e.ToString());

            return null;
        }

    }
}

C++

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
array<Byte>^ RSAEncrypt( array<Byte>^DataToEncrypt, RSAParameters RSAKeyInfo,
 bool DoOAEPPadding )
{
   try
   {
      
      //Create a new instance of RSACryptoServiceProvider.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider;
      
      //Import the RSA Key information. This only needs
      //toinclude the public key information.
      RSAalg->ImportParameters( RSAKeyInfo );
      
      //Encrypt the passed byte array and specify OAEP padding.  
      //OAEP padding is only available on Microsoft Windows XP or
      //later.  
      return RSAalg->Encrypt( DataToEncrypt, DoOAEPPadding
 );
   }
   //Catch and display a CryptographicException  
   //to the console.
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return nullptr;
   }

}

array<Byte>^ RSADecrypt( array<Byte>^DataToDecrypt, RSAParameters RSAKeyInfo,
 bool DoOAEPPadding )
{
   try
   {
      
      //Create a new instance of RSACryptoServiceProvider.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider;
      
      //Import the RSA Key information. This needs
      //to include the private key information.
      RSAalg->ImportParameters( RSAKeyInfo );
      
      //Decrypt the passed byte array and specify OAEP padding.  
      //OAEP padding is only available on Microsoft Windows XP or
      //later.  
      return RSAalg->Decrypt( DataToDecrypt, DoOAEPPadding
 );
   }
   //Catch and display a CryptographicException  
   //to the console.
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e );
      return nullptr;
   }

}

int main()
{
   try
   {
      
      //Create a UnicodeEncoder to convert between byte array and string.
      UnicodeEncoding^ ByteConverter = gcnew UnicodeEncoding;
      
      //Create byte arrays to hold original, encrypted, and decrypted
 data.
      array<Byte>^dataToEncrypt = ByteConverter->GetBytes( "Data to
 Encrypt" );
      array<Byte>^encryptedData;
      array<Byte>^decryptedData;
      
      //Create a new instance of RSACryptoServiceProvider to generate
      //public and private key data.  Pass an integer specifying a key-
      //length of 2048.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( 2048 );
      
      //Display the key-legth to the console.
      Console::WriteLine( "A new key pair of legth {0} was
 created", RSAalg->KeySize );
      
      //Pass the data to ENCRYPT, the public key information 
      //(using RSACryptoServiceProvider.ExportParameters(false),
      //and a boolean flag specifying no OAEP padding.
      encryptedData = RSAEncrypt( dataToEncrypt, RSAalg->ExportParameters( false
 ), false );
      
      //Pass the data to DECRYPT, the private key information 
      //(using RSACryptoServiceProvider.ExportParameters(true),
      //and a boolean flag specifying no OAEP padding.
      decryptedData = RSADecrypt( encryptedData, RSAalg->ExportParameters( true
 ), false );
      
      //Display the decrypted plaintext to the console. 
      Console::WriteLine( "Decrypted plaintext: {0}", ByteConverter->GetString(
 decryptedData ) );
   }
   catch ( ArgumentNullException^ ) 
   {
      
      //Catch this exception in case the encryption did
      //not succeed.
      Console::WriteLine( "Encryption failed." );
   }

}

import System.*;
import System.Security.Cryptography.*;
import System.Text.*;

class RSACSPSample
{
    public static void main(String[]
 args)
    {
        try {
            // Create a UnicodeEncoder to convert between byte array
 and string.
            UnicodeEncoding byteConverter = new UnicodeEncoding();

            // Create byte arrays to hold original, encrypted, and decrypted
 
            // data.
            ubyte dataToEncrypt[] = byteConverter.GetBytes("Data to Encrypt");
            ubyte encryptedData[];
            ubyte decryptedData[];

            // Create a new instance of RSACryptoServiceProvider to
 generate
            // public and private key data.  Pass an integer specifying
 a key-
            // length of 2048.
            RSACryptoServiceProvider rsaAlg = new RSACryptoServiceProvider(2048);

            //Display the key-legth to the console.
            Console.WriteLine("A new key pair of legth {0}
 was created", 
                System.Convert.ToString(rsaAlg.get_KeySize()));

            // Pass the data to ENCRYPT, the public key information
 
            // (using RSACryptoServiceProvider.ExportParameters(false)
,
            // and a boolean flag specifying no OAEP padding.
            encryptedData = RSAEncrypt(dataToEncrypt, 
                rsaAlg.ExportParameters(false), false);

            // Pass the data to DECRYPT, the private key information
 
            // (using RSACryptoServiceProvider.ExportParameters(true)
,
            // and a boolean flag specifying no OAEP padding.
            decryptedData = RSADecrypt(encryptedData, 
                rsaAlg.ExportParameters(true), false);

            //Display the decrypted plaintext to the console. 
            Console.WriteLine("Decrypted plaintext: {0}", 
                byteConverter.GetString(decryptedData));
        }
        catch (ArgumentNullException exp) {
            // Catch this exception in case the encryption did
            // not succeed.
            Console.WriteLine("Encryption failed.");
        }
    } //main

    public static ubyte[] RSAEncrypt(ubyte
 dataToEncrypt[], 
        RSAParameters rsaKeyInfo, boolean doOAEPPadding)
    {
        try {
            // Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider rsaAlg = new RSACryptoServiceProvider();

            // Import the RSA Key information. This only needs
            // toinclude the public key information.
            rsaAlg.ImportParameters(rsaKeyInfo);

            // Encrypt the passed byte array and specify OAEP padding.
  
            // OAEP padding is only available on Microsoft Windows XP
 or
            // later.  
            return rsaAlg.Encrypt(dataToEncrypt, doOAEPPadding);
        }
        // Catch and display a CryptographicException  
        // to the console.
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
            return null;
        }
    } //RSAEncrypt

    public static ubyte[] RSADecrypt(ubyte
 dataToDecrypt[], 
        RSAParameters rsaKeyInfo, boolean doOAEPPadding)
    {
        try {
            // Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider rsaAlg = new RSACryptoServiceProvider();

            // Import the RSA Key information. This needs
            // to include the private key information.
            rsaAlg.ImportParameters(rsaKeyInfo);

            // Decrypt the passed byte array and specify OAEP padding.
  
            // OAEP padding is only available on Microsoft Windows XP
 or
            // later.  
            return rsaAlg.Decrypt(dataToDecrypt, doOAEPPadding);
        }
            // Catch and display a CryptographicException  
            // to the console.
        catch (CryptographicException e) {
            Console.WriteLine(e.ToString());
            return null;
        }
    } //RSADecrypt
} //RSACSPSample

.NET Framework のセキュリティ

SecurityPermission (アンマネージコードを呼び出すために必要なアクセス許可)。SecurityPermissionFlag.UnmanagedCode (関連する列挙体)。

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
.NET Compact Framework
サポート対象 : 2.0

参照

関連項目
RSACryptoServiceProvider クラス
RSACryptoServiceProvider メンバ
System.Security.Cryptography 名前空間
その他の技術情報
暗号サービス

RSACryptoServiceProvider プロパティ

パブリックプロパティパブリックプロパティ

	名前	説明
	KeyExchangeAlgorithm	オーバーライドされます。 RSA のこの実装で使用できるキー交換アルゴリズムの名前を取得します。
	KeySize	オーバーライドされます。現在のキーのサイズを取得します。
	LegalKeySizes	非対称アルゴリズムでサポートされているキーサイズを取得します。 ( AsymmetricAlgorithm から継承されます。)
	SignatureAlgorithm	オーバーライドされます。 RSA のこの実装で使用できる署名アルゴリズムの名前を取得します。
	UseMachineKeyStore	ユーザープロファイルストアの代わりに、コンピュータのキーストアでキーを永続化する必要があるかどうかを示す値を取得または設定します。

参照

その他の技術情報

暗号サービス

RSACryptoServiceProvider メソッド

パブリックメソッドパブリックメソッド

	名前	説明
	Clear	AsymmetricAlgorithm クラスによって使用されているすべてのリソースを解放します。 ( AsymmetricAlgorithm から継承されます。)
	Create	オーバーロードされます。 RSA の特定の実装のインスタンス化を許可します。 ( RSA から継承されます。)
	Decrypt	RSA アルゴリズムでデータを復号化します。
	DecryptValue	オーバーライドされます。このメソッドは、現在のバージョンではサポートされていません。
	Encrypt	RSA アルゴリズムでデータを暗号化します。
	EncryptValue	オーバーライドされます。このメソッドは、現在のバージョンではサポートされていません。
	Equals	オーバーロードされます。 2 つの Object インスタンスが等しいかどうかを判断します。 ( Object から継承されます。)
	ExportCspBlob	RSACryptoServiceProvider オブジェクトに関連付けられたキー情報を含む BLOB をエクスポートします。
	ExportParameters	オーバーライドされます。 RSAParameters をエクスポートします。
	FromXmlString	XML 文字列のキー情報から RSA オブジェクトを初期化します。 ( RSA から継承されます。)
	GetHashCode	特定の型のハッシュ関数として機能します。GetHashCode は、ハッシュアルゴリズムや、ハッシュテーブルのようなデータ構造での使用に適しています。 ( Object から継承されます。)
	GetType	現在のインスタンスの Type を取得します。 ( Object から継承されます。)
	ImportCspBlob	RSA キー情報を表す BLOB をインポートします。
	ImportParameters	オーバーライドされます。指定した RSAParameters をインポートします。
	ReferenceEquals	指定した複数の Object インスタンスが同一かどうかを判断します。 ( Object から継承されます。)
	SignData	オーバーロードされます。指定したデータのハッシュ値を計算し、算出された値に署名します。
	SignHash	指定したハッシュ値を秘密キーで暗号化することにより、そのハッシュ値の署名を計算します。
	ToString	現在の Object を表す String を返します。 ( Object から継承されます。)
	ToXmlString	現在の RSA オブジェクトを格納している XML 文字列を作成して返します。 ( RSA から継承されます。)
	VerifyData	指定した署名データを、指定したデータに対して計算された署名と比較することによって検証します。
	VerifyHash	指定した署名データを、指定したハッシュ値に対して計算された署名と比較することによって検証します。

参照

その他の技術情報

暗号サービス

RSACryptoServiceProvider メンバ

RSACryptoServiceProvider データ型で公開されるメンバを以下の表に示します。

パブリックコンストラクタ

	名前	説明
	RSACryptoServiceProvider	オーバーロードされます。 RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。

パブリックプロパティ

	名前	説明
	KeyExchangeAlgorithm	オーバーライドされます。 RSA のこの実装で使用できるキー交換アルゴリズムの名前を取得します。
	KeySize	オーバーライドされます。現在のキーのサイズを取得します。
	LegalKeySizes	非対称アルゴリズムでサポートされているキーサイズを取得します。(AsymmetricAlgorithm から継承されます。)
	SignatureAlgorithm	オーバーライドされます。 RSA のこの実装で使用できる署名アルゴリズムの名前を取得します。
	UseMachineKeyStore	ユーザープロファイルストアの代わりに、コンピュータのキーストアでキーを永続化する必要があるかどうかを示す値を取得または設定します。

パブリックメソッド

	名前	説明
	Clear	AsymmetricAlgorithm クラスによって使用されているすべてのリソースを解放します。 (AsymmetricAlgorithm から継承されます。)
	Create	オーバーロードされます。 RSA の特定の実装のインスタンス化を許可します。 (RSA から継承されます。)
	Decrypt	RSA アルゴリズムでデータを復号化します。
	DecryptValue	オーバーライドされます。このメソッドは、現在のバージョンではサポートされていません。
	Encrypt	RSA アルゴリズムでデータを暗号化します。
	EncryptValue	オーバーライドされます。このメソッドは、現在のバージョンではサポートされていません。
	Equals	オーバーロードされます。 2 つの Object インスタンスが等しいかどうかを判断します。 (Object から継承されます。)
	ExportCspBlob	RSACryptoServiceProvider オブジェクトに関連付けられたキー情報を含む BLOB をエクスポートします。
	ExportParameters	オーバーライドされます。 RSAParameters をエクスポートします。
	FromXmlString	XML 文字列のキー情報から RSA オブジェクトを初期化します。 (RSA から継承されます。)
	GetHashCode	特定の型のハッシュ関数として機能します。GetHashCode は、ハッシュアルゴリズムや、ハッシュテーブルのようなデータ構造での使用に適しています。 (Object から継承されます。)
	GetType	現在のインスタンスの Type を取得します。 (Object から継承されます。)
	ImportCspBlob	RSA キー情報を表す BLOB をインポートします。
	ImportParameters	オーバーライドされます。指定した RSAParameters をインポートします。
	ReferenceEquals	指定した複数の Object インスタンスが同一かどうかを判断します。 (Object から継承されます。)
	SignData	オーバーロードされます。指定したデータのハッシュ値を計算し、算出された値に署名します。
	SignHash	指定したハッシュ値を秘密キーで暗号化することにより、そのハッシュ値の署名を計算します。
	ToString	現在の Object を表す String を返します。 (Object から継承されます。)
	ToXmlString	現在の RSA オブジェクトを格納している XML 文字列を作成して返します。 (RSA から継承されます。)
	VerifyData	指定した署名データを、指定したデータに対して計算された署名と比較することによって検証します。
	VerifyHash	指定した署名データを、指定したハッシュ値に対して計算された署名と比較することによって検証します。