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

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DSACryptoServiceProvider クラス

DSA アルゴリズムの暗号サービスプロバイダ (CSP : Cryptographic Service Provider) 実装にアクセスするためのラッパーオブジェクトを定義します。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
 DSACryptoServiceProvider
    Inherits DSA
    Implements ICspAsymmetricAlgorithm

Visual Basic (使用法)

Dim instance As DSACryptoServiceProvider

[ComVisibleAttribute(true)] 
public sealed class DSACryptoServiceProvider
 : DSA, ICspAsymmetricAlgorithm

C++

[ComVisibleAttribute(true)] 
public ref class DSACryptoServiceProvider sealed
 : public DSA, ICspAsymmetricAlgorithm

/** @attribute ComVisibleAttribute(true) */ 
public final class DSACryptoServiceProvider
 extends DSA implements ICspAsymmetricAlgorithm

JScript

ComVisibleAttribute(true) 
public final class DSACryptoServiceProvider
 extends DSA implements ICspAsymmetricAlgorithm

解説

DSACryptoServiceProvider クラスを使用すると、デジタル署名を作成し、データの整合性を保護できます。

公開キーシステムを使用してメッセージにデジタル署名を行うには、送信者は最初にメッセージにハッシュ関数を適用して、メッセージのダイジェストを作成します。送信者はメッセージダイジェストを自分の秘密キーで暗号化し、送信者の個人署名を作成します。受信者は、メッセージと署名を受け取ると、送信者の公開キーを使用して署名を解読してメッセージダイジェストを復元し、送信者が使用したものと同じハッシュアルゴリズムを使用してメッセージをハッシュします。受信者が計算したメッセージダイジェストが送信者から受信したメッセージダイジェストと完全に一致する場合、受信者はそのメッセージが送信中に改変されていないと確認できます。送信者の公開キーは公開されているため、その署名はだれもが検証できることに注意してください。

このアルゴリズムは、512 ビットから 1024 ビットのキー長を 64 ビット単位でサポートしています。

使用例

DSACryptoServiceProvider クラスを使用してハッシュ値のデジタル署名を作成し、署名を検証するコード例を次に示します。

Visual Basic

Imports System
Imports System.Security.Cryptography

 _

Class DSACSPSample


    Shared Sub Main()
        Try
            'Create a new instance of DSACryptoServiceProvider to generate
            'a new key pair.
            Dim DSA As New
 DSACryptoServiceProvider()

            'The hash value to sign.
            Dim HashValue As Byte()
 = {59, 4, 248, 102, 77, 97, 142, 201, 210, 12, 224, 93, 25, 41, 100, 197, 213,
 134, 130, 135}

            'The value to hold the signed value.
            Dim SignedHashValue As Byte()
 = DSASignHash(HashValue, DSA.ExportParameters(True), "SHA1")

            'Verify the hash and display the results.
            If DSAVerifyHash(HashValue, SignedHashValue, DSA.ExportParameters(False),
 "SHA1") Then
                Console.WriteLine("The hash value was verified.")
            Else
                Console.WriteLine("The hash value was not verified.")
            End If


        Catch e As ArgumentNullException
            Console.WriteLine(e.Message)
        End Try
    End Sub


    Public Shared Function
 DSASignHash(ByVal HashToSign() As Byte,
 ByVal DSAKeyInfo As DSAParameters, ByVal HashAlg As String) As
 Byte()
        Try
            'Create a new instance of DSACryptoServiceProvider.
            Dim DSA As New
 DSACryptoServiceProvider()

            'Import the key information.   
            DSA.ImportParameters(DSAKeyInfo)

            'Create an DSASignatureFormatter object and pass it the
 
            'DSACryptoServiceProvider to transfer the private key.
            Dim DSAFormatter As New
 DSASignatureFormatter(DSA)

            'Set the hash algorithm to the passed value.
            DSAFormatter.SetHashAlgorithm(HashAlg)

            'Create a signature for HashValue and return it.
            Return DSAFormatter.CreateSignature(HashToSign)
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return Nothing
        End Try
    End Function


    Public Shared Function
 DSAVerifyHash(ByVal HashValue() As Byte,
 ByVal SignedHashValue() As Byte, ByVal DSAKeyInfo As DSAParameters,
 ByVal HashAlg As String) As Boolean
        Try
            'Create a new instance of DSACryptoServiceProvider.
            Dim DSA As New
 DSACryptoServiceProvider()

            'Import the key information. 
            DSA.ImportParameters(DSAKeyInfo)

            'Create an DSASignatureDeformatter object and pass it the
 
            'DSACryptoServiceProvider to transfer the private key.
            Dim DSADeformatter As New
 DSASignatureDeformatter(DSA)

            'Set the hash algorithm to the passed value.
            DSADeformatter.SetHashAlgorithm(HashAlg)

            'Verify signature and return the result. 
            Return DSADeformatter.VerifySignature(HashValue, SignedHashValue)
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return False
        End Try
    End Function
End Class

using System;
using System.Security.Cryptography;

class DSACSPSample
{
        
    static void Main()
    {
        try
        {
            //Create a new instance of DSACryptoServiceProvider to generate
            //a new key pair.
            DSACryptoServiceProvider DSA = new DSACryptoServiceProvider();

            //The hash value to sign.
            byte[] HashValue = {59,4,248,102,77,97,142,201,210,12,224,93,25,41,100
,197,213,134,130,135};
                
            //The value to hold the signed value.
            byte[] SignedHashValue = DSASignHash(HashValue, DSA.ExportParameters(true),
 "SHA1");

            //Verify the hash and display the results.
            if(DSAVerifyHash(HashValue, SignedHashValue, DSA.ExportParameters(false),
 "SHA1"))
            {
                Console.WriteLine("The hash value was verified.");
            }
            else
            {
                Console.WriteLine("The hash value was not verified.");
            }


        }
        catch(ArgumentNullException e)
        {
            Console.WriteLine(e.Message);
        }
    }

    public static byte[] DSASignHash(byte[]
 HashToSign, DSAParameters DSAKeyInfo, string HashAlg)
    {
        try
        {
            //Create a new instance of DSACryptoServiceProvider.
            DSACryptoServiceProvider DSA = new DSACryptoServiceProvider();

            //Import the key information.   
            DSA.ImportParameters(DSAKeyInfo);

            //Create an DSASignatureFormatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the private key.
            DSASignatureFormatter DSAFormatter = new DSASignatureFormatter(DSA);

            //Set the hash algorithm to the passed value.
            DSAFormatter.SetHashAlgorithm(HashAlg);

            //Create a signature for HashValue and return it.
            return DSAFormatter.CreateSignature(HashToSign);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return null;
        }

    }

    public static bool DSAVerifyHash(byte[]
 HashValue, byte[] SignedHashValue, DSAParameters DSAKeyInfo, string
 HashAlg)
    {
        try
        {
            //Create a new instance of DSACryptoServiceProvider.
            DSACryptoServiceProvider DSA = new DSACryptoServiceProvider();

            //Import the key information. 
            DSA.ImportParameters(DSAKeyInfo);

            //Create an DSASignatureDeformatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the private key.
            DSASignatureDeformatter DSADeformatter = new DSASignatureDeformatter(DSA);
                
            //Set the hash algorithm to the passed value.
            DSADeformatter.SetHashAlgorithm(HashAlg);

            //Verify signature and return the result. 
            return DSADeformatter.VerifySignature(HashValue, SignedHashValue);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return false;
        }
            
    }

}

C++

#using <System.dll>

using namespace System;
using namespace System::Security::Cryptography;
array<Byte>^ DSASignHash( array<Byte>^HashToSign, DSAParameters DSAKeyInfo,
 String^ HashAlg )
{
   try
   {
      
      //Create a new instance of DSACryptoServiceProvider.
      DSACryptoServiceProvider^ DSA = gcnew DSACryptoServiceProvider;
      
      //Import the key information.   
      DSA->ImportParameters( DSAKeyInfo );
      
      //Create an DSASignatureFormatter object and pass it the 
      //DSACryptoServiceProvider to transfer the private key.
      DSASignatureFormatter^ DSAFormatter = gcnew DSASignatureFormatter( DSA );
      
      //Set the hash algorithm to the passed value.
      DSAFormatter->SetHashAlgorithm( HashAlg );
      
      //Create a signature for HashValue and return it.
      return DSAFormatter->CreateSignature( HashToSign );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return nullptr;
   }

}

bool DSAVerifyHash( array<Byte>^HashValue, array<Byte>^SignedHashValue,
 DSAParameters DSAKeyInfo, String^ HashAlg )
{
   try
   {
      
      //Create a new instance of DSACryptoServiceProvider.
      DSACryptoServiceProvider^ DSA = gcnew DSACryptoServiceProvider;
      
      //Import the key information. 
      DSA->ImportParameters( DSAKeyInfo );
      
      //Create an DSASignatureDeformatter Object* and pass it the 
      //DSACryptoServiceProvider to transfer the private key.
      DSASignatureDeformatter^ DSADeformatter = gcnew DSASignatureDeformatter( DSA
 );
      
      //Set the hash algorithm to the passed value.
      DSADeformatter->SetHashAlgorithm( HashAlg );
      
      //Verify signature and return the result. 
      return DSADeformatter->VerifySignature( HashValue, SignedHashValue
 );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return false;
   }

}

int main()
{
   try
   {
      
      //Create a new instance of DSACryptoServiceProvider to generate
      //a new key pair.
      DSACryptoServiceProvider^ DSA = gcnew DSACryptoServiceProvider;
      
      //The hash value to sign.
      array<Byte>^HashValue = {59,4,248,102,77,97,142,201,210,12,224,93,25
,41,100,197,213,134,130,135};
      
      //The value to hold the signed value.
      array<Byte>^SignedHashValue = DSASignHash( HashValue, DSA->ExportParameters(
 true ), "SHA1" );
      
      //Verify the hash and display the results.
      if ( DSAVerifyHash( HashValue, SignedHashValue, DSA->ExportParameters(
 false ), "SHA1" ) )
      {
         Console::WriteLine( "The hash value was verified." );
      }
      else
      {
         Console::WriteLine( "The hash value was not verified." );
      }
   }
   catch ( ArgumentNullException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

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

class DSACSPSample
{
    public static void main(String[]
 args)
    {
        try {
            // Create a new instance of DSACryptoServiceProvider to
 generate
            // a new key pair.
            DSACryptoServiceProvider dsa =  new DSACryptoServiceProvider();
            
            // The hash value to sign.
            ubyte hashValue[] =  {59, 4, 248, 102, 77, 97, 142, 201,
                210, 12, 224, 93, 25, 41, 100, 197, 213, 134, 130, 135};
            
            // The value to hold the signed value.
            ubyte signedHashValue[] = DSASignHash(hashValue,
                dsa.ExportParameters(true), "SHA1");
            
            // Verify the hash and display the results.
            if (DSAVerifyHash(hashValue, signedHashValue, 
                dsa.ExportParameters(false), "SHA1"))
 {
                Console.WriteLine("The hash value was verified.");
            }
            else {
                Console.WriteLine("The hash value was not verified.");
            }
        } 
        catch (ArgumentNullException e) {
            Console.WriteLine(e.get_Message());
        }
    } //main

    public static ubyte[] DSASignHash(ubyte
 hashToSign[], 
        DSAParameters dsaKeyInfo, String hashAlg) 
    {
        try {
            // Create a new instance of DSACryptoServiceProvider.
            DSACryptoServiceProvider dsa =  new DSACryptoServiceProvider();
            
            // Import the key information.   
            dsa.ImportParameters(dsaKeyInfo);
            
            // Create an DSASignatureFormatter object and pass it the
 
            // DSACryptoServiceProvider to transfer the private key.
            DSASignatureFormatter dsaFormatter =  new
                DSASignatureFormatter(dsa);
            
            // Set the hash algorithm to the passed value.
            dsaFormatter.SetHashAlgorithm(hashAlg);
            
            // Create a signature for HashValue and return it.
            return dsaFormatter.CreateSignature(hashToSign) ;
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
            return null ;
        }
    } //DSASignHash

    public static boolean DSAVerifyHash(ubyte
 hashValue[], 
        ubyte signedHashValue[], DSAParameters dsaKeyInfo, String hashAlg) 
    {
        try {
            // Create a new instance of DSACryptoServiceProvider.
            DSACryptoServiceProvider dsa =  new DSACryptoServiceProvider();
            
            // Import the key information. 
            dsa.ImportParameters(dsaKeyInfo);
            
            // Create an DSASignatureDeformatter object and pass it
 the 
            // DSACryptoServiceProvider to transfer the private key.
            DSASignatureDeformatter dsaDeformatter =  new 
                DSASignatureDeformatter(dsa);
            
            // Set the hash algorithm to the passed value.
            dsaDeformatter.SetHashAlgorithm(hashAlg);
            
            // Verify signature and return the result. 
            return dsaDeformatter.VerifySignature(hashValue, signedHashValue);
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
            return false ;
        }
    } //DSAVerifyHash
} //DSACSPSample

継承階層

System.Object
   System.Security.Cryptography.AsymmetricAlgorithm
     System.Security.Cryptography.DSA
      System.Security.Cryptography.DSACryptoServiceProvider

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

DSACryptoServiceProvider コンストラクタ ()

DSACryptoServiceProvider 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 DSACryptoServiceProvider

public DSACryptoServiceProvider ()

C++

public:
DSACryptoServiceProvider ()

public DSACryptoServiceProvider ()

JScript

public function DSACryptoServiceProvider ()

使用例

DSACryptoServiceProvider クラスを使用してハッシュ値のデジタル署名を作成し、署名を検証するコード例を次に示します。

Visual Basic

Imports System
Imports System.Security.Cryptography

 _

Class DSACSPSample


    Shared Sub Main()
        Try
            'Create a new instance of DSACryptoServiceProvider to generate
            'a new key pair.
            Dim DSA As New
 DSACryptoServiceProvider()

            'The hash value to sign.
            Dim HashValue As Byte()
 = {59, 4, 248, 102, 77, 97, 142, 201, 210, 12, 224, 93, 25, 41, 100, 197, 213,
 134, 130, 135}

            'The value to hold the signed value.
            Dim SignedHashValue As Byte()
 = DSASignHash(HashValue, DSA.ExportParameters(True), "SHA1")

            'Verify the hash and display the results.
            If DSAVerifyHash(HashValue, SignedHashValue, DSA.ExportParameters(False),
 "SHA1") Then
                Console.WriteLine("The hash value was verified.")
            Else
                Console.WriteLine("The hash value was not verified.")
            End If


        Catch e As ArgumentNullException
            Console.WriteLine(e.Message)
        End Try
    End Sub


    Public Shared Function
 DSASignHash(ByVal HashToSign() As Byte,
 ByVal DSAKeyInfo As DSAParameters, ByVal HashAlg As String) As
 Byte()
        Try
            'Create a new instance of DSACryptoServiceProvider.
            Dim DSA As New
 DSACryptoServiceProvider()

            'Import the key information.   
            DSA.ImportParameters(DSAKeyInfo)

            'Create an DSASignatureFormatter object and pass it the
 
            'DSACryptoServiceProvider to transfer the private key.
            Dim DSAFormatter As New
 DSASignatureFormatter(DSA)

            'Set the hash algorithm to the passed value.
            DSAFormatter.SetHashAlgorithm(HashAlg)

            'Create a signature for HashValue and return it.
            Return DSAFormatter.CreateSignature(HashToSign)
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return Nothing
        End Try
    End Function


    Public Shared Function
 DSAVerifyHash(ByVal HashValue() As Byte,
 ByVal SignedHashValue() As Byte, ByVal DSAKeyInfo As DSAParameters,
 ByVal HashAlg As String) As Boolean
        Try
            'Create a new instance of DSACryptoServiceProvider.
            Dim DSA As New
 DSACryptoServiceProvider()

            'Import the key information. 
            DSA.ImportParameters(DSAKeyInfo)

            'Create an DSASignatureDeformatter object and pass it the
 
            'DSACryptoServiceProvider to transfer the private key.
            Dim DSADeformatter As New
 DSASignatureDeformatter(DSA)

            'Set the hash algorithm to the passed value.
            DSADeformatter.SetHashAlgorithm(HashAlg)

            'Verify signature and return the result. 
            Return DSADeformatter.VerifySignature(HashValue, SignedHashValue)
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return False
        End Try
    End Function
End Class

using System;
using System.Security.Cryptography;

class DSACSPSample
{
        
    static void Main()
    {
        try
        {
            //Create a new instance of DSACryptoServiceProvider to generate
            //a new key pair.
            DSACryptoServiceProvider DSA = new DSACryptoServiceProvider();

            //The hash value to sign.
            byte[] HashValue = {59,4,248,102,77,97,142,201,210,12,224,93,25,41,100
,197,213,134,130,135};
                
            //The value to hold the signed value.
            byte[] SignedHashValue = DSASignHash(HashValue, DSA.ExportParameters(true),
 "SHA1");

            //Verify the hash and display the results.
            if(DSAVerifyHash(HashValue, SignedHashValue, DSA.ExportParameters(false),
 "SHA1"))
            {
                Console.WriteLine("The hash value was verified.");
            }
            else
            {
                Console.WriteLine("The hash value was not verified.");
            }


        }
        catch(ArgumentNullException e)
        {
            Console.WriteLine(e.Message);
        }
    }

    public static byte[] DSASignHash(byte[]
 HashToSign, DSAParameters DSAKeyInfo, string HashAlg)
    {
        try
        {
            //Create a new instance of DSACryptoServiceProvider.
            DSACryptoServiceProvider DSA = new DSACryptoServiceProvider();

            //Import the key information.   
            DSA.ImportParameters(DSAKeyInfo);

            //Create an DSASignatureFormatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the private key.
            DSASignatureFormatter DSAFormatter = new DSASignatureFormatter(DSA);

            //Set the hash algorithm to the passed value.
            DSAFormatter.SetHashAlgorithm(HashAlg);

            //Create a signature for HashValue and return it.
            return DSAFormatter.CreateSignature(HashToSign);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return null;
        }

    }

    public static bool DSAVerifyHash(byte[]
 HashValue, byte[] SignedHashValue, DSAParameters DSAKeyInfo, string
 HashAlg)
    {
        try
        {
            //Create a new instance of DSACryptoServiceProvider.
            DSACryptoServiceProvider DSA = new DSACryptoServiceProvider();

            //Import the key information. 
            DSA.ImportParameters(DSAKeyInfo);

            //Create an DSASignatureDeformatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the private key.
            DSASignatureDeformatter DSADeformatter = new DSASignatureDeformatter(DSA);
                
            //Set the hash algorithm to the passed value.
            DSADeformatter.SetHashAlgorithm(HashAlg);

            //Verify signature and return the result. 
            return DSADeformatter.VerifySignature(HashValue, SignedHashValue);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return false;
        }
            
    }

}

C++

#using <System.dll>

using namespace System;
using namespace System::Security::Cryptography;
array<Byte>^ DSASignHash( array<Byte>^HashToSign, DSAParameters DSAKeyInfo,
 String^ HashAlg )
{
   try
   {
      
      //Create a new instance of DSACryptoServiceProvider.
      DSACryptoServiceProvider^ DSA = gcnew DSACryptoServiceProvider;
      
      //Import the key information.   
      DSA->ImportParameters( DSAKeyInfo );
      
      //Create an DSASignatureFormatter object and pass it the 
      //DSACryptoServiceProvider to transfer the private key.
      DSASignatureFormatter^ DSAFormatter = gcnew DSASignatureFormatter( DSA );
      
      //Set the hash algorithm to the passed value.
      DSAFormatter->SetHashAlgorithm( HashAlg );
      
      //Create a signature for HashValue and return it.
      return DSAFormatter->CreateSignature( HashToSign );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return nullptr;
   }

}

bool DSAVerifyHash( array<Byte>^HashValue, array<Byte>^SignedHashValue,
 DSAParameters DSAKeyInfo, String^ HashAlg )
{
   try
   {
      
      //Create a new instance of DSACryptoServiceProvider.
      DSACryptoServiceProvider^ DSA = gcnew DSACryptoServiceProvider;
      
      //Import the key information. 
      DSA->ImportParameters( DSAKeyInfo );
      
      //Create an DSASignatureDeformatter Object* and pass it the 
      //DSACryptoServiceProvider to transfer the private key.
      DSASignatureDeformatter^ DSADeformatter = gcnew DSASignatureDeformatter( DSA
 );
      
      //Set the hash algorithm to the passed value.
      DSADeformatter->SetHashAlgorithm( HashAlg );
      
      //Verify signature and return the result. 
      return DSADeformatter->VerifySignature( HashValue, SignedHashValue
 );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return false;
   }

}

int main()
{
   try
   {
      
      //Create a new instance of DSACryptoServiceProvider to generate
      //a new key pair.
      DSACryptoServiceProvider^ DSA = gcnew DSACryptoServiceProvider;
      
      //The hash value to sign.
      array<Byte>^HashValue = {59,4,248,102,77,97,142,201,210,12,224,93,25
,41,100,197,213,134,130,135};
      
      //The value to hold the signed value.
      array<Byte>^SignedHashValue = DSASignHash( HashValue, DSA->ExportParameters(
 true ), "SHA1" );
      
      //Verify the hash and display the results.
      if ( DSAVerifyHash( HashValue, SignedHashValue, DSA->ExportParameters(
 false ), "SHA1" ) )
      {
         Console::WriteLine( "The hash value was verified." );
      }
      else
      {
         Console::WriteLine( "The hash value was not verified." );
      }
   }
   catch ( ArgumentNullException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

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

class DSACSPSample
{
    public static void main(String[]
 args)
    {
        try {
            // Create a new instance of DSACryptoServiceProvider to
 generate
            // a new key pair.
            DSACryptoServiceProvider dsa =  new DSACryptoServiceProvider();
            
            // The hash value to sign.
            ubyte hashValue[] =  {59, 4, 248, 102, 77, 97, 142, 201,
                210, 12, 224, 93, 25, 41, 100, 197, 213, 134, 130, 135};
            
            // The value to hold the signed value.
            ubyte signedHashValue[] = DSASignHash(hashValue,
                dsa.ExportParameters(true), "SHA1");
            
            // Verify the hash and display the results.
            if (DSAVerifyHash(hashValue, signedHashValue, 
                dsa.ExportParameters(false), "SHA1"))
 {
                Console.WriteLine("The hash value was verified.");
            }
            else {
                Console.WriteLine("The hash value was not verified.");
            }
        } 
        catch (ArgumentNullException e) {
            Console.WriteLine(e.get_Message());
        }
    } //main

    public static ubyte[] DSASignHash(ubyte
 hashToSign[], 
        DSAParameters dsaKeyInfo, String hashAlg) 
    {
        try {
            // Create a new instance of DSACryptoServiceProvider.
            DSACryptoServiceProvider dsa =  new DSACryptoServiceProvider();
            
            // Import the key information.   
            dsa.ImportParameters(dsaKeyInfo);
            
            // Create an DSASignatureFormatter object and pass it the
 
            // DSACryptoServiceProvider to transfer the private key.
            DSASignatureFormatter dsaFormatter =  new
                DSASignatureFormatter(dsa);
            
            // Set the hash algorithm to the passed value.
            dsaFormatter.SetHashAlgorithm(hashAlg);
            
            // Create a signature for HashValue and return it.
            return dsaFormatter.CreateSignature(hashToSign) ;
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
            return null ;
        }
    } //DSASignHash

    public static boolean DSAVerifyHash(ubyte
 hashValue[], 
        ubyte signedHashValue[], DSAParameters dsaKeyInfo, String hashAlg) 
    {
        try {
            // Create a new instance of DSACryptoServiceProvider.
            DSACryptoServiceProvider dsa =  new DSACryptoServiceProvider();
            
            // Import the key information. 
            dsa.ImportParameters(dsaKeyInfo);
            
            // Create an DSASignatureDeformatter object and pass it
 the 
            // DSACryptoServiceProvider to transfer the private key.
            DSASignatureDeformatter dsaDeformatter =  new 
                DSASignatureDeformatter(dsa);
            
            // Set the hash algorithm to the passed value.
            dsaDeformatter.SetHashAlgorithm(hashAlg);
            
            // Verify signature and return the result. 
            return dsaDeformatter.VerifySignature(hashValue, signedHashValue);
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
            return false ;
        }
    } //DSAVerifyHash
} //DSACSPSample

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

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

キーサイズおよび暗号サービスプロバイダ (CSP) のパラメータを指定して、DSACryptoServiceProvider 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 DSACryptoServiceProvider(dwKeySize,
 parameters)

public DSACryptoServiceProvider (
    int dwKeySize,
    CspParameters parameters
)

C++

public:
DSACryptoServiceProvider (
    int dwKeySize, 
    CspParameters^ parameters
)

public DSACryptoServiceProvider (
    int dwKeySize, 
    CspParameters parameters
)

JScript

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

パラメータ

dwKeySize: 暗号アルゴリズムで使用されるキーのサイズ (ビット単位)。

parameters: CSP のパラメータ。

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。

使用例

DSACryptoServiceProvider を作成し、新しいキーペアを生成して、このキーペアをキーコンテナ内で永続化するコード例を次に示します。

Visual Basic

Imports System.Security.Cryptography

Module DSACSPExample

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

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

            'The hash value to sign.
            Dim HashValue As Byte()
 = {59, 4, 248, 102, 77, 97, 142, 201, 210, 12, 224, _ 
                                       93, 25, 41, 100, 197, 213, 134, 130, 135}

            'The value to hold the signed value.
            Dim SignedHashValue As Byte()
 = DSASignHash(HashValue, KeyContainerName, "SHA1")

            'Verify the hash and display the results.
            If DSAVerifyHash(HashValue, SignedHashValue, KeyContainerName,
 "SHA1") Then
                Console.WriteLine("The hash value was verified.")
            Else
                Console.WriteLine("The hash value was not verified.")
            End If

            'Delete 
            DSADeleteKeyInCSP(KeyContainerName)


        Catch e As ArgumentNullException
            Console.WriteLine(e.Message)
        End Try

    End Sub

    Sub DSAPersistKeyInCSP(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(13)

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

            'Create a new instance of DSACryptoServiceProvider to generate
            'a new key pair.  Pass a key size of 1024. Pass the CspParameters
 
            'class to persist the key in the container.
            Dim DSAalg As New
 DSACryptoServiceProvider(1024, cspParams)

            'Indicate that the key was persisted.
            Console.WriteLine("The DSA key was persisted in the
 container, ""{0}"".",
 ContainerName)

            'Indicate the key size.
            Console.WriteLine("The key size is: {0}.",
 DSAalg.KeySize)

        Catch e As CryptographicException
            Console.WriteLine(e.Message)
        End Try
    End Sub


    Sub DSADeleteKeyInCSP(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(13)

            ' 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.
            Dim DSAalg As New
 DSACryptoServiceProvider(cspParams)

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

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

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


    Function DSASignHash(ByVal HashToSign()
 As Byte, ByVal ContainerName
 As String, ByVal HashAlg As String) 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(13)

            ' 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.
            Dim DSAalg As New
 DSACryptoServiceProvider(cspParams)

            'Create an DSASignatureFormatter object and pass it the
 
            'DSACryptoServiceProvider to transfer the private key.
            Dim DSAFormatter As New
 DSASignatureFormatter(DSAalg)

            'Set the hash algorithm to the passed value.
            DSAFormatter.SetHashAlgorithm(HashAlg)

            'Create a signature for HashValue and return it.
            Return DSAFormatter.CreateSignature(HashToSign)
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return Nothing
        End Try
    End Function


    Function DSAVerifyHash(ByVal HashValue()
 As Byte, ByVal SignedHashValue()
 As Byte, ByVal ContainerName As String, ByVal HashAlg
 As String) As Boolean
        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(13)

            ' 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.
            Dim DSAalg As New
 DSACryptoServiceProvider(cspParams)

            'Create an DSASignatureDeformatter object and pass it the
 
            'DSACryptoServiceProvider to transfer the private key.
            Dim DSADeformatter As New
 DSASignatureDeformatter(DSAalg)

            'Set the hash algorithm to the passed value.
            DSADeformatter.SetHashAlgorithm(HashAlg)

            'Verify signature and return the result. 
            Return DSADeformatter.VerifySignature(HashValue, SignedHashValue)
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return False
        End Try
    End Function

End Module

using System;
using System.Security.Cryptography;

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

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

            //The hash value to sign.
            byte[] HashValue = {59,4,248,102,77,97,142,201,210,12,224,93,25,41,100
,197,213,134,130,135};
                
            //The value to hold the signed value.
            byte[] SignedHashValue = DSASignHash(HashValue, KeyContainerName, "SHA1");

            //Verify the hash and display the results.
            if(DSAVerifyHash(HashValue, SignedHashValue, KeyContainerName,
 "SHA1"))
            {
                Console.WriteLine("The hash value was verified.");
            }
            else
            {
                Console.WriteLine("The hash value was not verified.");
            }

            //Delete 
            DSADeleteKeyInCSP(KeyContainerName);


        }
        catch(ArgumentNullException e)
        {
            Console.WriteLine(e.Message);
        }
    }

    public static void DSAPersistKeyInCSP(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(13);

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

            //Create a new instance of DSACryptoServiceProvider to generate
            //a new key pair.  Pass a key size of 1024. Pass the CspParameters
 
            //class to persist the key in the container.
            DSACryptoServiceProvider DSAalg = new DSACryptoServiceProvider(1024,
 cspParams);

            //Indicate that the key was persisted.
            Console.WriteLine("The DSA key was persisted in
 the container, \"{0}\".", ContainerName);
      
            //Indicate the key size.
            Console.WriteLine("The key size is: {0}.", DSAalg.KeySize);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

        }
    }

    public static void DSADeleteKeyInCSP(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(13);

            // 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.
            DSACryptoServiceProvider DSAalg = new DSACryptoServiceProvider(cspParams);

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

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

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

        }
    }

    public static byte[] DSASignHash(byte[]
 HashToSign, string ContainerName, string
 HashAlg)
    {
        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(13);

            // 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.
            DSACryptoServiceProvider DSAalg = new DSACryptoServiceProvider(cspParams);

            //Create an DSASignatureFormatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the private key.
            DSASignatureFormatter DSAFormatter = new DSASignatureFormatter(DSAalg);

            //Set the hash algorithm to the passed value.
            DSAFormatter.SetHashAlgorithm(HashAlg);

            //Create a signature for HashValue and return it.
            return DSAFormatter.CreateSignature(HashToSign);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return null;
        }
    }

    public static bool DSAVerifyHash(byte[]
 HashValue, byte[] SignedHashValue, string ContainerName, string
 HashAlg)
    {
        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(13);

            // 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.
            DSACryptoServiceProvider DSAalg = new DSACryptoServiceProvider(cspParams);

            //Create an DSASignatureDeformatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the private key.
            DSASignatureDeformatter DSADeformatter = new DSASignatureDeformatter(DSAalg);
                
            //Set the hash algorithm to the passed value.
            DSADeformatter.SetHashAlgorithm(HashAlg);

            //Verify signature and return the result. 
            return DSADeformatter.VerifySignature(HashValue, SignedHashValue);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return false;
        }        
    }
}

C++

using namespace System;
using namespace System::Security::Cryptography;
void DSAPersistKeyInCSP( 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( 13 );
      
      // Specify the container name using the passed variable.
      cspParams->KeyContainerName = ContainerName;
      
      //Create a new instance of DSACryptoServiceProvider to generate
      //a new key pair.  Pass a key size of 1024. Pass the CspParameters
 
      //class to persist the key in the container.
      DSACryptoServiceProvider^ DSAalg = gcnew DSACryptoServiceProvider( 1024,cspParams
 );
      
      //Indicate that the key was persisted.
      Console::WriteLine( "The DSA key was persisted in the
 container, \"{0}\".", ContainerName );
      
      //Indicate the key size.
      Console::WriteLine( "The key size is: {0}.", DSAalg->KeySize );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

void DSADeleteKeyInCSP( 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( 13 );
      
      // 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.
      DSACryptoServiceProvider^ DSAalg = gcnew DSACryptoServiceProvider( cspParams
 );
      
      //Delete the key entry in the container.
      DSAalg->PersistKeyInCsp = false;
      
      //Call Clear to release resources and delete the key from the
 container.
      DSAalg->Clear();
      
      //Indicate that the key was persisted.
      Console::WriteLine( "The DSA key was deleted from the container, \"{0}\".",
 ContainerName );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

array<Byte>^ DSASignHash( array<Byte>^HashToSign, String^ ContainerName,
 String^ HashAlg )
{
   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( 13 );
      
      // 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.
      DSACryptoServiceProvider^ DSAalg = gcnew DSACryptoServiceProvider( cspParams
 );
      
      //Create an DSASignatureFormatter object and pass it the 
      //DSACryptoServiceProvider to transfer the private key.
      DSASignatureFormatter^ DSAFormatter = gcnew DSASignatureFormatter( DSAalg );
      
      //Set the hash algorithm to the passed value.
      DSAFormatter->SetHashAlgorithm( HashAlg );
      
      //Create a signature for HashValue and return it.
      return DSAFormatter->CreateSignature( HashToSign );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return nullptr;
   }

}

bool DSAVerifyHash( array<Byte>^HashValue, array<Byte>^SignedHashValue,
 String^ ContainerName, String^ HashAlg )
{
   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( 13 );
      
      // 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.
      DSACryptoServiceProvider^ DSAalg = gcnew DSACryptoServiceProvider( cspParams
 );
      
      //Create an DSASignatureDeformatter object and pass it the 
      //DSACryptoServiceProvider to transfer the private key.
      DSASignatureDeformatter^ DSADeformatter = gcnew DSASignatureDeformatter( DSAalg
 );
      
      //Set the hash algorithm to the passed value.
      DSADeformatter->SetHashAlgorithm( HashAlg );
      
      //Verify signature and return the result. 
      return DSADeformatter->VerifySignature( HashValue, SignedHashValue
 );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return false;
   }

}

int main()
{
   try
   {
      String^ KeyContainerName = "MyKeyContainer";
      
      //Create a new key and persist it in 
      //the key container.
      DSAPersistKeyInCSP( KeyContainerName );
      
      //The hash value to sign.
      array<Byte>^HashValue = {59,4,248,102,77,97,142,201,210,12,224,93,25
,41,100,197,213,134,130,135};
      
      //The value to hold the signed value.
      array<Byte>^SignedHashValue = DSASignHash( HashValue, KeyContainerName,
 "SHA1" );
      
      //Verify the hash and display the results.
      if ( DSAVerifyHash( HashValue, SignedHashValue, KeyContainerName,
 "SHA1" ) )
      {
         Console::WriteLine( "The hash value was verified." );
      }
      else
      {
         Console::WriteLine( "The hash value was not verified." );
      }
      
      //Delete 
      DSADeleteKeyInCSP( KeyContainerName );
   }
   catch ( ArgumentNullException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

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

class DSACSPExample
{
    public static void main(String
 args[])
    {
        try {
            String keyContainerName = "MyKeyContainer";
            //Create a new key and persist it in 
            //the key container.
            DSAPersistKeyInCSP(keyContainerName);
            //The hash value to sign.
            ubyte hashValue[] =  { 59, 4, 248, 102, 77, 97, 142, 201, 210, 12, 
                224, 93, 25, 41, 100, 197, 213, 134, 130, 135 };
            //The value to hold the signed value.
            ubyte signedHashValue[] = DSASignHash(hashValue, keyContainerName,
                "SHA1");
            //Verify the hash and display the results.
            if (DSAVerifyHash(hashValue, signedHashValue, keyContainerName,
 
                "SHA1")) {
                Console.WriteLine("The hash value was verified.");
            }
            else {
                Console.WriteLine("The hash value was not verified.");
            }
            //Delete 
            DSADeleteKeyInCSP(keyContainerName);
        }
        catch (ArgumentNullException e) {
            Console.WriteLine(e.get_Message());
        }
    } //main

    public static void DSAPersistKeyInCSP(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(13);
            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = containerName;
            //Create a new instance of DSACryptoServiceProvider to generate
            //a new key pair.  Pass a key size of 1024. Pass the CspParameters
 
            //class to persist the key in the container.
            DSACryptoServiceProvider dsaAlg = new DSACryptoServiceProvider(1024
,
                cspParams);
            //Indicate that the key was persisted.
            Console.WriteLine("The DSA key was persisted in
 the container," 
                + " \"{0}\".", containerName);
            //Indicate the key size.
            Console.WriteLine("The key size is: {0}.", System.Convert.ToString(
                dsaAlg.get_KeySize()));
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
        }
    } //DSAPersistKeyInCSP

    public static void DSADeleteKeyInCSP(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(13);
            // 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.
            DSACryptoServiceProvider dsaAlg = 
                new DSACryptoServiceProvider(cspParams);
            //Delete the key entry in the container.
            dsaAlg.set_PersistKeyInCsp(false);
            //Call Clear to release resources and delete the key from
 the 
            //container.
            dsaAlg.Clear();
            //Indicate that the key was persisted.
            Console.WriteLine("The DSA key was deleted from the container, "
 
                + "\"{0}\".", containerName);
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
        }
    } //DSADeleteKeyInCSP

    public static ubyte[] DSASignHash(ubyte
 hashToSign[], String containerName,
        String hashAlg)
    {
        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(13);
            // 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.
            DSACryptoServiceProvider dsaAlg = 
                new DSACryptoServiceProvider(cspParams);
            //Create an DSASignatureFormatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the private key.
            DSASignatureFormatter dsaFormatter = 
                new DSASignatureFormatter(dsaAlg);
            //Set the hash algorithm to the passed value.
            dsaFormatter.SetHashAlgorithm(hashAlg);
            //Create a signature for hashValue and return it.
            return dsaFormatter.CreateSignature(hashToSign);
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());

            return null;
        }
    } //DSASignHash

    public static boolean DSAVerifyHash(ubyte
 hashValue[], 
        ubyte signedHashValue[], String containerName, String hashAlg)
    {
        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(13);
            // 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.
            DSACryptoServiceProvider dsaAlg = 
                new DSACryptoServiceProvider(cspParams);
            //Create an DSASignatureDeformatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the private key.
            DSASignatureDeformatter dsaDeformatter = 
                new DSASignatureDeformatter(dsaAlg);
            //Set the hash algorithm to the passed value.
            dsaDeformatter.SetHashAlgorithm(hashAlg);
            //Verify signature and return the result. 
            return dsaDeformatter.VerifySignature(hashValue, signedHashValue);
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());

            return false;
        }
    } //DSAVerifyHash
} //DSACSPExample

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

DSACryptoServiceProvider コンストラクタ (CspParameters)

暗号サービスプロバイダ (CSP) のパラメータを指定して、DSACryptoServiceProvider 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 DSACryptoServiceProvider(parameters)

public DSACryptoServiceProvider (
    CspParameters parameters
)

C++

public:
DSACryptoServiceProvider (
    CspParameters^ parameters
)

public DSACryptoServiceProvider (
    CspParameters parameters
)

JScript

public function DSACryptoServiceProvider (
    parameters : CspParameters
)

パラメータ

parameters: CSP のパラメータ。

使用例

DSACryptoServiceProvider を作成し、新しいキーペアを生成して、このキーペアをキーコンテナ内で永続化するコード例を次に示します。

Visual Basic

Imports System.Security.Cryptography

Module DSACSPExample

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

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

            'The hash value to sign.
            Dim HashValue As Byte()
 = {59, 4, 248, 102, 77, 97, 142, 201, 210, 12, 224, _ 
                                       93, 25, 41, 100, 197, 213, 134, 130, 135}

            'The value to hold the signed value.
            Dim SignedHashValue As Byte()
 = DSASignHash(HashValue, KeyContainerName, "SHA1")

            'Verify the hash and display the results.
            If DSAVerifyHash(HashValue, SignedHashValue, KeyContainerName,
 "SHA1") Then
                Console.WriteLine("The hash value was verified.")
            Else
                Console.WriteLine("The hash value was not verified.")
            End If

            'Delete 
            DSADeleteKeyInCSP(KeyContainerName)


        Catch e As ArgumentNullException
            Console.WriteLine(e.Message)
        End Try

    End Sub

    Sub DSAPersistKeyInCSP(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(13)

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

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

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


    Sub DSADeleteKeyInCSP(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(13)

            ' 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.
            Dim DSAalg As New
 DSACryptoServiceProvider(cspParams)

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

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

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


    Function DSASignHash(ByVal HashToSign()
 As Byte, ByVal ContainerName
 As String, ByVal HashAlg As String) 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(13)

            ' 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.
            Dim DSAalg As New
 DSACryptoServiceProvider(cspParams)

            'Create an DSASignatureFormatter object and pass it the
 
            'DSACryptoServiceProvider to transfer the private key.
            Dim DSAFormatter As New
 DSASignatureFormatter(DSAalg)

            'Set the hash algorithm to the passed value.
            DSAFormatter.SetHashAlgorithm(HashAlg)

            'Create a signature for HashValue and return it.
            Return DSAFormatter.CreateSignature(HashToSign)
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return Nothing
        End Try
    End Function


    Function DSAVerifyHash(ByVal HashValue()
 As Byte, ByVal SignedHashValue()
 As Byte, ByVal ContainerName As String, ByVal HashAlg
 As String) As Boolean
        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(13)

            ' 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.
            Dim DSAalg As New
 DSACryptoServiceProvider(cspParams)

            'Create an DSASignatureDeformatter object and pass it the
 
            'DSACryptoServiceProvider to transfer the private key.
            Dim DSADeformatter As New
 DSASignatureDeformatter(DSAalg)

            'Set the hash algorithm to the passed value.
            DSADeformatter.SetHashAlgorithm(HashAlg)

            'Verify signature and return the result. 
            Return DSADeformatter.VerifySignature(HashValue, SignedHashValue)
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return False
        End Try
    End Function

End Module

using System;
using System.Security.Cryptography;

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

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

            //The hash value to sign.
            byte[] HashValue = {59,4,248,102,77,97,142,201,210,12,224,93,25,41,100
,197,213,134,130,135};
                
            //The value to hold the signed value.
            byte[] SignedHashValue = DSASignHash(HashValue, KeyContainerName, "SHA1");

            //Verify the hash and display the results.
            if(DSAVerifyHash(HashValue, SignedHashValue, KeyContainerName,
 "SHA1"))
            {
                Console.WriteLine("The hash value was verified.");
            }
            else
            {
                Console.WriteLine("The hash value was not verified.");
            }

            //Delete 
            DSADeleteKeyInCSP(KeyContainerName);


        }
        catch(ArgumentNullException e)
        {
            Console.WriteLine(e.Message);
        }
    }

    public static void DSAPersistKeyInCSP(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(13);

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

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

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

        }
    }

    public static void DSADeleteKeyInCSP(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(13);

            // 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.
            DSACryptoServiceProvider DSAalg = new DSACryptoServiceProvider(cspParams);

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

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

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

        }
    }

    public static byte[] DSASignHash(byte[]
 HashToSign, string ContainerName, string
 HashAlg)
    {
        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(13);

            // 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.
            DSACryptoServiceProvider DSAalg = new DSACryptoServiceProvider(cspParams);

            //Create an DSASignatureFormatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the private key.
            DSASignatureFormatter DSAFormatter = new DSASignatureFormatter(DSAalg);

            //Set the hash algorithm to the passed value.
            DSAFormatter.SetHashAlgorithm(HashAlg);

            //Create a signature for HashValue and return it.
            return DSAFormatter.CreateSignature(HashToSign);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return null;
        }
    }

    public static bool DSAVerifyHash(byte[]
 HashValue, byte[] SignedHashValue, string ContainerName, string
 HashAlg)
    {
        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(13);

            // 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.
            DSACryptoServiceProvider DSAalg = new DSACryptoServiceProvider(cspParams);

            //Create an DSASignatureDeformatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the private key.
            DSASignatureDeformatter DSADeformatter = new DSASignatureDeformatter(DSAalg);
                
            //Set the hash algorithm to the passed value.
            DSADeformatter.SetHashAlgorithm(HashAlg);

            //Verify signature and return the result. 
            return DSADeformatter.VerifySignature(HashValue, SignedHashValue);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return false;
        }        
    }
}

C++

using namespace System;
using namespace System::Security::Cryptography;
void DSAPersistKeyInCSP( 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( 13 );
      
      // Specify the container name using the passed variable.
      cspParams->KeyContainerName = ContainerName;
      
      //Create a new instance of DSACryptoServiceProvider to generate
      //a new key pair.  Pass the CspParameters class to persist the
 
      //key in the container.
      DSACryptoServiceProvider^ DSAalg = gcnew DSACryptoServiceProvider( cspParams
 );
      
      //Indicate that the key was persisted.
      Console::WriteLine( "The DSA key was persisted in the
 container, \"{0}\".", ContainerName );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

void DSADeleteKeyInCSP( 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( 13 );
      
      // 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.
      DSACryptoServiceProvider^ DSAalg = gcnew DSACryptoServiceProvider( cspParams
 );
      
      //Delete the key entry in the container.
      DSAalg->PersistKeyInCsp = false;
      
      //Call Clear to release resources and delete the key from the
 container.
      DSAalg->Clear();
      
      //Indicate that the key was persisted.
      Console::WriteLine( "The DSA key was deleted from the container, \"{0}\".",
 ContainerName );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

array<Byte>^ DSASignHash( array<Byte>^HashToSign, String^ ContainerName,
 String^ HashAlg )
{
   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( 13 );
      
      // 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.
      DSACryptoServiceProvider^ DSAalg = gcnew DSACryptoServiceProvider( cspParams
 );
      
      //Create an DSASignatureFormatter object and pass it the 
      //DSACryptoServiceProvider to transfer the private key.
      DSASignatureFormatter^ DSAFormatter = gcnew DSASignatureFormatter( DSAalg );
      
      //Set the hash algorithm to the passed value.
      DSAFormatter->SetHashAlgorithm( HashAlg );
      
      //Create a signature for HashValue and return it.
      return DSAFormatter->CreateSignature( HashToSign );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return nullptr;
   }

}

bool DSAVerifyHash( array<Byte>^HashValue, array<Byte>^SignedHashValue,
 String^ ContainerName, String^ HashAlg )
{
   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( 13 );
      
      // 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.
      DSACryptoServiceProvider^ DSAalg = gcnew DSACryptoServiceProvider( cspParams
 );
      
      //Create an DSASignatureDeformatter object and pass it the 
      //DSACryptoServiceProvider to transfer the private key.
      DSASignatureDeformatter^ DSADeformatter = gcnew DSASignatureDeformatter( DSAalg
 );
      
      //Set the hash algorithm to the passed value.
      DSADeformatter->SetHashAlgorithm( HashAlg );
      
      //Verify signature and return the result. 
      return DSADeformatter->VerifySignature( HashValue, SignedHashValue
 );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return false;
   }

}

int main()
{
   try
   {
      String^ KeyContainerName = "MyKeyContainer";
      
      //Create a new key and persist it in 
      //the key container.
      DSAPersistKeyInCSP( KeyContainerName );
      
      //The hash value to sign.
      array<Byte>^HashValue = {59,4,248,102,77,97,142,201,210,12,224,93,25
,41,100,197,213,134,130,135};
      
      //The value to hold the signed value.
      array<Byte>^SignedHashValue = DSASignHash( HashValue, KeyContainerName,
 "SHA1" );
      
      //Verify the hash and display the results.
      if ( DSAVerifyHash( HashValue, SignedHashValue, KeyContainerName,
 "SHA1" ) )
      {
         Console::WriteLine( "The hash value was verified." );
      }
      else
      {
         Console::WriteLine( "The hash value was not verified." );
      }
      
      //Delete 
      DSADeleteKeyInCSP( KeyContainerName );
   }
   catch ( ArgumentNullException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

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

class DSACSPExample
{
    public static void main(String
 args[])
    {
        try {
            String keyContainerName = "MyKeyContainer";
            //Create a new key and persist it in 
            //the key container.
            DSAPersistKeyInCSP(keyContainerName);
            //The hash value to sign.
            ubyte hashValue[] =  { 59, 4, 248, 102, 77, 97, 142, 201, 210, 12, 
                224, 93, 25, 41, 100, 197, 213, 134, 130, 135 };
            //The value to hold the signed value.
            ubyte signedHashValue[] = DSASignHash(hashValue, keyContainerName, 
                "SHA1");
            //Verify the hash and display the results.
            if (DSAVerifyHash(hashValue, signedHashValue, keyContainerName,
 
                "SHA1")) {
                Console.WriteLine("The hash value was verified.");
            }
            else {
                Console.WriteLine("The hash value was not verified.");
            }
            //Delete 
            DSADeleteKeyInCSP(keyContainerName);
        }
        catch (ArgumentNullException e) {
            Console.WriteLine(e.get_Message());
        }
    } //main

    public static void DSAPersistKeyInCSP(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(13);
            // Specify the container name using the passed variable.
            cspParams.KeyContainerName = containerName;
            //Create a new instance of DSACryptoServiceProvider to generate
            //a new key pair.  Pass the CspParameters class to persist
 the 
            //key in the container.
            DSACryptoServiceProvider dsaAlg = 
                new DSACryptoServiceProvider(cspParams);
            //Indicate that the key was persisted.
            Console.WriteLine("The DSA key was persisted in
 the container, " 
                + "\"{0}\".", containerName);
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
        }
    } //DSAPersistKeyInCSP

    public static void DSADeleteKeyInCSP(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(13);
            // 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.
            DSACryptoServiceProvider dsaAlg = 
                new DSACryptoServiceProvider(cspParams);
            //Delete the key entry in the container.
            dsaAlg.set_PersistKeyInCsp(false);
            //Call Clear to release resources and delete the key from
 
            // the container.
            dsaAlg.Clear();
            //Indicate that the key was persisted.
            Console.WriteLine("The DSA key was deleted from the container, "
 
                + "\"{0}\".", containerName);
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
        }
    } //DSADeleteKeyInCSP

    public static ubyte[] DSASignHash(ubyte
 hashToSign[], String containerName, 
        String hashAlg)
    {
        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(13);
            // 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.
            DSACryptoServiceProvider dsaAlg = 
                new DSACryptoServiceProvider(cspParams);
            //Create an DSASignatureFormatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the private key.
            DSASignatureFormatter dsaFormatter = 
                new DSASignatureFormatter(dsaAlg);
            //Set the hash algorithm to the passed value.
            dsaFormatter.SetHashAlgorithm(hashAlg);
            //Create a signature for hashValue and return it.
            return dsaFormatter.CreateSignature(hashToSign);
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
            return null;
        }
    } //DSASignHash

    public static boolean DSAVerifyHash(ubyte
 hashValue[], 
        ubyte signedHashValue[], String containerName, String hashAlg)
    {
        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(13);
            // 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.
            DSACryptoServiceProvider dsaAlg = 
                new DSACryptoServiceProvider(cspParams);
            //Create an DSASignatureDeformatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the private key.
            DSASignatureDeformatter dsaDeformatter = 
                new DSASignatureDeformatter(dsaAlg);
            //Set the hash algorithm to the passed value.
            dsaDeformatter.SetHashAlgorithm(hashAlg);
            //Verify signature and return the result. 
            return dsaDeformatter.VerifySignature(hashValue, signedHashValue);
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
            return false;
        }
    } //DSAVerifyHash
} //DSACSPExample

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

DSACryptoServiceProvider コンストラクタ

DSACryptoServiceProvider 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
DSACryptoServiceProvider ()	DSACryptoServiceProvider 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。
DSACryptoServiceProvider (CspParameters)	暗号サービスプロバイダ (CSP) のパラメータを指定して、DSACryptoServiceProvider 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。
DSACryptoServiceProvider (Int32)	キーのサイズを指定して、DSACryptoServiceProvider 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。
DSACryptoServiceProvider (Int32, CspParameters)	キーサイズおよび暗号サービスプロバイダ (CSP) のパラメータを指定して、DSACryptoServiceProvider 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

DSACryptoServiceProvider コンストラクタ (Int32)

キーのサイズを指定して、DSACryptoServiceProvider 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 DSACryptoServiceProvider(dwKeySize)

public DSACryptoServiceProvider (
    int dwKeySize
)

C++

public:
DSACryptoServiceProvider (
    int dwKeySize
)

public DSACryptoServiceProvider (
    int dwKeySize
)

JScript

public function DSACryptoServiceProvider (
    dwKeySize : int
)

パラメータ

dwKeySize: 非対称アルゴリズムで使用されるキーのサイズ (ビット単位)。

使用例

DSACryptoServiceProvider を作成し、新しいキーペアを生成して、このキーペアをキーコンテナ内で永続化するコード例を次に示します。

Visual Basic

Imports System.Security.Cryptography

Module DSACSPExample

    Sub Main()
        Try
            'Create a new instance of DSACryptoServiceProvider to generate
            'a new key pair.  This constructor specifies that the key-length
            'will be 1024.
            Dim DSAalg As New
 DSACryptoServiceProvider(1024)

            'The hash value to sign.
            Dim HashValue As Byte()
 = {59, 4, 248, 102, 77, 97, 142, 201, 210, _
                                       12, 224, 93, 25, 41, 100, 197, 213, 134, _
                                       130, 135}

            'The value to hold the signed value.
            Dim SignedHashValue As Byte()
 = DSASignHash(HashValue, DSAalg.ExportParameters(True), "SHA1")

            'Verify the hash and display the results.
            If DSAVerifyHash(HashValue, SignedHashValue, DSAalg.ExportParameters(False),
 "SHA1") Then
                Console.WriteLine("The hash value was verified.")
            Else
                Console.WriteLine("The hash value was not verified.")
            End If


        Catch e As ArgumentNullException
            Console.WriteLine(e.Message)
        End Try

    End Sub

    Function DSASignHash(ByVal HashToSign()
 As Byte, ByVal DSAKeyInfo
 As DSAParameters, ByVal HashAlg As String) As Byte()
        Try
            'Create a new instance of DSACryptoServiceProvider.
            Dim DSA As New
 DSACryptoServiceProvider

            'Import the key information.   
            DSA.ImportParameters(DSAKeyInfo)

            'Create an DSASignatureFormatter object and pass it the
 
            'DSACryptoServiceProvider to transfer the private key.
            Dim DSAFormatter As New
 DSASignatureFormatter(DSA)

            'Set the hash algorithm to the passed value.
            DSAFormatter.SetHashAlgorithm(HashAlg)

            'Create a signature for HashValue and return it.
            Return DSAFormatter.CreateSignature(HashToSign)
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return Nothing
        End Try
    End Function


    Function DSAVerifyHash(ByVal HashValue()
 As Byte, ByVal SignedHashValue()
 As Byte, ByVal DSAKeyInfo As DSAParameters, ByVal HashAlg As
 String) As Boolean
        Try
            'Create a new instance of DSACryptoServiceProvider.
            Dim DSA As New
 DSACryptoServiceProvider

            'Import the key information. 
            DSA.ImportParameters(DSAKeyInfo)

            'Create an DSASignatureDeformatter object and pass it the
 
            'DSACryptoServiceProvider to transfer the private key.
            Dim DSADeformatter As New
 DSASignatureDeformatter(DSA)

            'Set the hash algorithm to the passed value.
            DSADeformatter.SetHashAlgorithm(HashAlg)

            'Verify signature and return the result. 
            Return DSADeformatter.VerifySignature(HashValue, SignedHashValue)
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return False
        End Try
    End Function

End Module

using System;
using System.Security.Cryptography;

class DSACSPExample
{
    static void Main()
    {
        try
        {
            //Create a new instance of DSACryptoServiceProvider to generate
            //a new key pair.  This constructor specifies that the key-length
            //will be 1024.
            DSACryptoServiceProvider DSAalg = new DSACryptoServiceProvider(1024);

            //The hash value to sign.
            byte[] HashValue = {59,4,248,102,77,97,142,201,210,12,224,93,25,41,100
,197,213,134,130,135};
                
            //The value to hold the signed value.
            byte[] SignedHashValue = DSASignHash(HashValue, DSAalg.ExportParameters(true),
 "SHA1");

            //Verify the hash and display the results.
            if(DSAVerifyHash(HashValue, SignedHashValue, DSAalg.ExportParameters(false),
 "SHA1"))
            {
                Console.WriteLine("The hash value was verified.");
            }
            else
            {
                Console.WriteLine("The hash value was not verified.");
            }


        }
        catch(ArgumentNullException e)
        {
            Console.WriteLine(e.Message);
        }
    }

    public static byte[] DSASignHash(byte[]
 HashToSign, DSAParameters DSAKeyInfo, string HashAlg)
    {
        try
        {
            //Create a new instance of DSACryptoServiceProvider.
            DSACryptoServiceProvider DSA = new DSACryptoServiceProvider();

            //Import the key information.   
            DSA.ImportParameters(DSAKeyInfo);

            //Create an DSASignatureFormatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the private key.
            DSASignatureFormatter DSAFormatter = new DSASignatureFormatter(DSA);

            //Set the hash algorithm to the passed value.
            DSAFormatter.SetHashAlgorithm(HashAlg);

            //Create a signature for HashValue and return it.
            return DSAFormatter.CreateSignature(HashToSign);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return null;
        }
    }

    public static bool DSAVerifyHash(byte[]
 HashValue, byte[] SignedHashValue, DSAParameters DSAKeyInfo, string
 HashAlg)
    {
        try
        {
            //Create a new instance of DSACryptoServiceProvider.
            DSACryptoServiceProvider DSA = new DSACryptoServiceProvider();

            //Import the key information. 
            DSA.ImportParameters(DSAKeyInfo);

            //Create an DSASignatureDeformatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the private key.
            DSASignatureDeformatter DSADeformatter = new DSASignatureDeformatter(DSA);
                
            //Set the hash algorithm to the passed value.
            DSADeformatter.SetHashAlgorithm(HashAlg);

            //Verify signature and return the result. 
            return DSADeformatter.VerifySignature(HashValue, SignedHashValue);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return false;
        }        
    }
}

C++

using namespace System;
using namespace System::Security::Cryptography;
array<Byte>^ DSASignHash( array<Byte>^HashToSign, DSAParameters DSAKeyInfo,
 String^ HashAlg )
{
   try
   {
      
      //Create a new instance of DSACryptoServiceProvider.
      DSACryptoServiceProvider^ DSA = gcnew DSACryptoServiceProvider;
      
      //Import the key information.   
      DSA->ImportParameters( DSAKeyInfo );
      
      //Create an DSASignatureFormatter object and pass it the 
      //DSACryptoServiceProvider to transfer the private key.
      DSASignatureFormatter^ DSAFormatter = gcnew DSASignatureFormatter( DSA );
      
      //Set the hash algorithm to the passed value.
      DSAFormatter->SetHashAlgorithm( HashAlg );
      
      //Create a signature for HashValue and return it.
      return DSAFormatter->CreateSignature( HashToSign );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return nullptr;
   }

}

bool DSAVerifyHash( array<Byte>^HashValue, array<Byte>^SignedHashValue,
 DSAParameters DSAKeyInfo, String^ HashAlg )
{
   try
   {
      
      //Create a new instance of DSACryptoServiceProvider.
      DSACryptoServiceProvider^ DSA = gcnew DSACryptoServiceProvider;
      
      //Import the key information. 
      DSA->ImportParameters( DSAKeyInfo );
      
      //Create an DSASignatureDeformatter object and pass it the 
      //DSACryptoServiceProvider to transfer the private key.
      DSASignatureDeformatter^ DSADeformatter = gcnew DSASignatureDeformatter( DSA
 );
      
      //Set the hash algorithm to the passed value.
      DSADeformatter->SetHashAlgorithm( HashAlg );
      
      //Verify signature and return the result. 
      return DSADeformatter->VerifySignature( HashValue, SignedHashValue
 );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return false;
   }

}

int main()
{
   try
   {
      
      //Create a new instance of DSACryptoServiceProvider to generate
      //a new key pair.  This constructor specifies that the key-length
      //will be 1024.
      DSACryptoServiceProvider^ DSAalg = gcnew DSACryptoServiceProvider( 1024 );
      
      //The hash value to sign.
      array<Byte>^HashValue = {59,4,248,102,77,97,142,201,210,12,224,93,25
,41,100,197,213,134,130,135};
      
      //The value to hold the signed value.
      array<Byte>^SignedHashValue = DSASignHash( HashValue, DSAalg->ExportParameters(
 true ), "SHA1" );
      
      //Verify the hash and display the results.
      if ( DSAVerifyHash( HashValue, SignedHashValue, DSAalg->ExportParameters(
 false ), "SHA1" ) )
      {
         Console::WriteLine( "The hash value was verified." );
      }
      else
      {
         Console::WriteLine( "The hash value was not verified." );
      }
   }
   catch ( ArgumentNullException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

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

class DSACSPExample
{
    public static void main(String
 args[])
    {
        try {
            //Create a new instance of DSACryptoServiceProvider to generate
            //a new key pair.  This constructor specifies that the key-length
            //will be 1024.
            DSACryptoServiceProvider dsaAlg = 
                new DSACryptoServiceProvider(1024);
            //The hash value to sign.
            ubyte hashValue[] =  { 59, 4, 248, 102, 77, 97, 142, 201, 210, 12, 
                224, 93, 25, 41, 100, 197, 213, 134, 130, 135 };
            //The value to hold the signed value.
            ubyte signedHashValue[] = DSASignHash(hashValue, 
                    dsaAlg.ExportParameters(true), "SHA1");
            //Verify the hash and display the results.
            if (DSAVerifyHash(hashValue, signedHashValue, 
                dsaAlg.ExportParameters(false), "SHA1"))
 {
                Console.WriteLine("The hash value was verified.");
            }
            else {
                Console.WriteLine("The hash value was not verified.");
            }
        }
        catch (ArgumentNullException e) {
            Console.WriteLine(e.get_Message());
        }
    } //main

    public static ubyte[] DSASignHash(ubyte
 hashToSign[], 
        DSAParameters dsaKeyInfo, 
        String hashAlg)
    {
        try {
            //Create a new instance of DSACryptoServiceProvider.
            DSACryptoServiceProvider dsa = new DSACryptoServiceProvider();
            //Import the key information.   
            dsa.ImportParameters(dsaKeyInfo);
            //Create an DSASignatureFormatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the private key.
            DSASignatureFormatter dsaFormatter = new DSASignatureFormatter(dsa);
            //Set the hash algorithm to the passed value.
            dsaFormatter.SetHashAlgorithm(hashAlg);
            //Create a signature for hashValue and return it.
            return dsaFormatter.CreateSignature(hashToSign);
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
            return null;
        }
    } //DSASignHash

    public static boolean DSAVerifyHash(ubyte
 hashValue[], 
        ubyte signedHashValue[], 
        DSAParameters dsaKeyInfo, String hashAlg)
    {
        try {
            //Create a new instance of DSACryptoServiceProvider.
            DSACryptoServiceProvider dsa = new DSACryptoServiceProvider();
            //Import the key information. 
            dsa.ImportParameters(dsaKeyInfo);
            //Create an DSASignatureDeformatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the private key.
            DSASignatureDeformatter dsaDeformatter = 
                new DSASignatureDeformatter(dsa);
            //Set the hash algorithm to the passed value.
            dsaDeformatter.SetHashAlgorithm(hashAlg);
            //Verify signature and return the result. 
            return dsaDeformatter.VerifySignature(hashValue, signedHashValue);
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
            return false;
        }
    } //DSAVerifyHash
} //DSACSPExample

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

DSACryptoServiceProvider フィールド

プロテクトフィールドプロテクトフィールド

	名前	説明
	KeySizeValue	非対称アルゴリズムで使用されるキーモジュラスのサイズをビット単位で表します。 ( AsymmetricAlgorithm から継承されます。)
	LegalKeySizesValue	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指定します。 ( AsymmetricAlgorithm から継承されます。)

参照

その他の技術情報

暗号サービス

DSACryptoServiceProvider 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。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。非対称アルゴリズムで使用されるキーのサイズをビット単位で取得します。
	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。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

DSACryptoServiceProvider メソッド

パブリックメソッドパブリックメソッド

( プロテクトメソッドも参照)

	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。非対称アルゴリズムを実行するために使用する暗号オブジェクトを作成します。 ( DSA から継承されます。)
	CreateSignature	オーバーライドされます。指定したデータに対する DSA 署名を作成します。
	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	DSACryptoServiceProvider 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。 DSAParameters をエクスポートします。
	FromXmlString	XML 文字列から DSA オブジェクトを再構築します。 ( DSA 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	DSA 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 DSAParameters 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 DSA オブジェクトの XML 文字列形式を作成して返します。 ( DSA 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。
	VerifySignature	オーバーライドされます。指定したデータに対する DSA 署名を検証します。

プロテクトメソッド

	名前	説明
	Dispose	オーバーライドされます。 DSACryptoServiceProvider によって使用されているアンマネージリソースを解放し、オプションでマネージリソースも解放します。
	Finalize	オーバーライドされます。
	MemberwiseClone	現在の Object の簡易コピーを作成します。 ( Object から継承されます。)

参照

その他の技術情報

暗号サービス

DSACryptoServiceProvider メンバ

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

プロテクトフィールド

	名前	説明
	KeySizeValue	非対称アルゴリズムで使用されるキーモジュラスのサイズをビット単位で表します。(AsymmetricAlgorithm から継承されます。)
	LegalKeySizesValue	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指定します。(AsymmetricAlgorithm から継承されます。)

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。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。非対称アルゴリズムで使用されるキーのサイズをビット単位で取得します。
	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。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

( プロテクトメソッドも参照)

	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。非対称アルゴリズムを実行するために使用する暗号オブジェクトを作成します。 (DSA から継承されます。)
	CreateSignature	オーバーライドされます。指定したデータに対する DSA 署名を作成します。
	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	DSACryptoServiceProvider 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。 DSAParameters をエクスポートします。
	FromXmlString	XML 文字列から DSA オブジェクトを再構築します。 (DSA 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	DSA 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 DSAParameters 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 DSA オブジェクトの XML 文字列形式を作成して返します。 (DSA 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。
	VerifySignature	オーバーライドされます。指定したデータに対する DSA 署名を検証します。

プロテクトメソッド

	名前	説明
	Dispose	オーバーライドされます。 DSACryptoServiceProvider によって使用されているアンマネージリソースを解放し、オプションでマネージリソースも解放します。
	Finalize	オーバーライドされます。
	MemberwiseClone	現在の Object の簡易コピーを作成します。 (Object から継承されます。)

参照

その他の技術情報

暗号サービス

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DSACryptoServiceProviderとは？わかりやすく解説

DSACryptoServiceProvider クラス

DSACryptoServiceProvider コンストラクタ ()

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

DSACryptoServiceProvider コンストラクタ (CspParameters)

DSACryptoServiceProvider コンストラクタ

関連項目

その他の技術情報

DSACryptoServiceProvider コンストラクタ (Int32)

DSACryptoServiceProvider フィールド

関連項目

その他の技術情報

DSACryptoServiceProvider プロパティ

関連項目

その他の技術情報

DSACryptoServiceProvider メソッド

関連項目

その他の技術情報

DSACryptoServiceProvider メンバ

関連項目

その他の技術情報

「DSACryptoServiceProvider」の関連用語


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DSACryptoServiceProviderとは？ わかりやすく解説

DSACryptoServiceProvider クラス

DSACryptoServiceProvider コンストラクタ ()

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

DSACryptoServiceProvider コンストラクタ (CspParameters)

DSACryptoServiceProvider コンストラクタ

関連項目

その他の技術情報

DSACryptoServiceProvider コンストラクタ (Int32)

DSACryptoServiceProvider フィールド

関連項目

その他の技術情報

DSACryptoServiceProvider プロパティ

関連項目

その他の技術情報

DSACryptoServiceProvider メソッド

関連項目

その他の技術情報

DSACryptoServiceProvider メンバ

関連項目

その他の技術情報

急上昇のことば

「DSACryptoServiceProvider」の関連用語

DSACryptoServiceProviderとは？わかりやすく解説