RSACryptoServiceProvider コンストラクター
定義
重要
一部の情報は、リリース前に大きく変更される可能性があるプレリリースされた製品に関するものです。 Microsoft は、ここに記載されている情報について、明示または黙示を問わず、一切保証しません。
RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。
オーバーロード
| RSACryptoServiceProvider() |
ランダムなキーのペアで、RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。 |
| RSACryptoServiceProvider(Int32) |
指定したキー サイズのランダムなキー ペアで、RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。 |
| RSACryptoServiceProvider(CspParameters) |
指定したパラメーターを使用して、RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。 |
| RSACryptoServiceProvider(Int32, CspParameters) |
指定されたキー サイズおよびパラメーターを使用して、RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。 |
RSACryptoServiceProvider()
ランダムなキーのペアで、RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。
public:
RSACryptoServiceProvider();public RSACryptoServiceProvider ();[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public RSACryptoServiceProvider ();Public Sub New ()- 属性
例外
暗号化サービス プロバイダー (CSP) を取得できません。
例
次のコード例では、 クラスを RSACryptoServiceProvider 使用して文字列をバイト配列に暗号化し、バイトを文字列に復号化します。
using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
array<Byte>^ RSAEncrypt( array<Byte>^DataToEncrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding )
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider^ RSA = gcnew RSACryptoServiceProvider;
//Import the RSA Key information. This only needs
//toinclude the public key information.
RSA->ImportParameters( RSAKeyInfo );
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
array<Byte>^encryptedData = RSA->Encrypt( DataToEncrypt, DoOAEPPadding );
delete RSA;
return encryptedData;
}
//Catch and display a CryptographicException
//to the console.
catch ( CryptographicException^ e )
{
Console::WriteLine( e->Message );
return nullptr;
}
}
array<Byte>^ RSADecrypt( array<Byte>^DataToDecrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding )
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider^ RSA = gcnew RSACryptoServiceProvider;
//Import the RSA Key information. This needs
//to include the private key information.
RSA->ImportParameters( RSAKeyInfo );
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
array<Byte>^decryptedData = RSA->Decrypt( DataToDecrypt, DoOAEPPadding );
delete RSA;
return decryptedData;
}
//Catch and display a CryptographicException
//to the console.
catch ( CryptographicException^ e )
{
Console::WriteLine( e );
return nullptr;
}
}
int main()
{
try
{
//Create a UnicodeEncoder to convert between byte array and string.
UnicodeEncoding^ ByteConverter = gcnew UnicodeEncoding;
//Create byte arrays to hold original, encrypted, and decrypted data.
array<Byte>^dataToEncrypt = ByteConverter->GetBytes( "Data to Encrypt" );
array<Byte>^encryptedData;
array<Byte>^decryptedData;
//Create a new instance of RSACryptoServiceProvider to generate
//public and private key data.
RSACryptoServiceProvider^ RSA = gcnew RSACryptoServiceProvider;
//Pass the data to ENCRYPT, the public key information
//(using RSACryptoServiceProvider.ExportParameters(false),
//and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt( dataToEncrypt, RSA->ExportParameters( false ), false );
//Pass the data to DECRYPT, the private key information
//(using RSACryptoServiceProvider.ExportParameters(true),
//and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt( encryptedData, RSA->ExportParameters( true ), false );
//Display the decrypted plaintext to the console.
Console::WriteLine( "Decrypted plaintext: {0}", ByteConverter->GetString( decryptedData ) );
delete RSA;
}
catch ( ArgumentNullException^ )
{
//Catch this exception in case the encryption did
//not succeed.
Console::WriteLine( "Encryption failed." );
}
}
using System;
using System.Security.Cryptography;
using System.Text;
class RSACSPSample
{
static void Main()
{
try
{
//Create a UnicodeEncoder to convert between byte array and string.
UnicodeEncoding ByteConverter = new UnicodeEncoding();
//Create byte arrays to hold original, encrypted, and decrypted data.
byte[] dataToEncrypt = ByteConverter.GetBytes("Data to Encrypt");
byte[] encryptedData;
byte[] decryptedData;
//Create a new instance of RSACryptoServiceProvider to generate
//public and private key data.
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider())
{
//Pass the data to ENCRYPT, the public key information
//(using RSACryptoServiceProvider.ExportParameters(false),
//and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt, RSA.ExportParameters(false), false);
//Pass the data to DECRYPT, the private key information
//(using RSACryptoServiceProvider.ExportParameters(true),
//and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData, RSA.ExportParameters(true), false);
//Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));
}
}
catch (ArgumentNullException)
{
//Catch this exception in case the encryption did
//not succeed.
Console.WriteLine("Encryption failed.");
}
}
public static byte[] RSAEncrypt(byte[] DataToEncrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding)
{
try
{
byte[] encryptedData;
//Create a new instance of RSACryptoServiceProvider.
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider())
{
//Import the RSA Key information. This only needs
//to include the public key information.
RSA.ImportParameters(RSAKeyInfo);
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
encryptedData = RSA.Encrypt(DataToEncrypt, DoOAEPPadding);
}
return encryptedData;
}
//Catch and display a CryptographicException
//to the console.
catch (CryptographicException e)
{
Console.WriteLine(e.Message);
return null;
}
}
public static byte[] RSADecrypt(byte[] DataToDecrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding)
{
try
{
byte[] decryptedData;
//Create a new instance of RSACryptoServiceProvider.
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider())
{
//Import the RSA Key information. This needs
//to include the private key information.
RSA.ImportParameters(RSAKeyInfo);
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
decryptedData = RSA.Decrypt(DataToDecrypt, DoOAEPPadding);
}
return decryptedData;
}
//Catch and display a CryptographicException
//to the console.
catch (CryptographicException e)
{
Console.WriteLine(e.ToString());
return null;
}
}
}
Imports System.Security.Cryptography
Imports System.Text
_
Class RSACSPSample
Shared Sub Main()
Try
'Create a UnicodeEncoder to convert between byte array and string.
Dim ByteConverter As New UnicodeEncoding()
'Create byte arrays to hold original, encrypted, and decrypted data.
Dim dataToEncrypt As Byte() = ByteConverter.GetBytes("Data to Encrypt")
Dim encryptedData() As Byte
Dim decryptedData() As Byte
'Create a new instance of RSACryptoServiceProvider to generate
'public and private key data.
Using RSA As New RSACryptoServiceProvider
'Pass the data to ENCRYPT, the public key information
'(using RSACryptoServiceProvider.ExportParameters(false),
'and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt, RSA.ExportParameters(False), False)
'Pass the data to DECRYPT, the private key information
'(using RSACryptoServiceProvider.ExportParameters(true),
'and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData, RSA.ExportParameters(True), False)
'Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData))
End Using
Catch e As ArgumentNullException
'Catch this exception in case the encryption did
'not succeed.
Console.WriteLine("Encryption failed.")
End Try
End Sub
Public Shared Function RSAEncrypt(ByVal DataToEncrypt() As Byte, ByVal RSAKeyInfo As RSAParameters, ByVal DoOAEPPadding As Boolean) As Byte()
Try
Dim encryptedData() As Byte
'Create a new instance of RSACryptoServiceProvider.
Using RSA As New RSACryptoServiceProvider
'Import the RSA Key information. This only needs
'toinclude the public key information.
RSA.ImportParameters(RSAKeyInfo)
'Encrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
encryptedData = RSA.Encrypt(DataToEncrypt, DoOAEPPadding)
End Using
Return encryptedData
'Catch and display a CryptographicException
'to the console.
Catch e As CryptographicException
Console.WriteLine(e.Message)
Return Nothing
End Try
End Function
Public Shared Function RSADecrypt(ByVal DataToDecrypt() As Byte, ByVal RSAKeyInfo As RSAParameters, ByVal DoOAEPPadding As Boolean) As Byte()
Try
Dim decryptedData() As Byte
'Create a new instance of RSACryptoServiceProvider.
Using RSA As New RSACryptoServiceProvider
'Import the RSA Key information. This needs
'to include the private key information.
RSA.ImportParameters(RSAKeyInfo)
'Decrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
decryptedData = RSA.Decrypt(DataToDecrypt, DoOAEPPadding)
'Catch and display a CryptographicException
'to the console.
End Using
Return decryptedData
Catch e As CryptographicException
Console.WriteLine(e.ToString())
Return Nothing
End Try
End Function
End Class
注釈
このコンストラクターは、セッション キーを Exchange 暗号化するのに適したキー ペアを作成し、他のユーザーと安全に格納および交換できるようにします。 生成されたキーは、アンマネージド Microsoft Cryptographic API (CAPI) で使用される値を使用して AT_KEYEXCHANGE 生成されたキーに対応します。
このコンストラクターは、新しい公開キーと秘密キーペアをすぐに生成しません。 キーが必要になる前に ImportParameters 、 メソッドまたはその他のキー インポート メソッドを介してキーが読み込まれない場合は、必要に応じて 1024 ビットエフェメラル キーが作成されます。
こちらもご覧ください
適用対象
RSACryptoServiceProvider(Int32)
指定したキー サイズのランダムなキー ペアで、RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。
public:
RSACryptoServiceProvider(int dwKeySize);public RSACryptoServiceProvider (int dwKeySize);[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public RSACryptoServiceProvider (int dwKeySize);new System.Security.Cryptography.RSACryptoServiceProvider : int -> System.Security.Cryptography.RSACryptoServiceProvider[<System.Runtime.Versioning.UnsupportedOSPlatform("browser")>]
new System.Security.Cryptography.RSACryptoServiceProvider : int -> System.Security.Cryptography.RSACryptoServiceProviderPublic Sub New (dwKeySize As Integer)パラメーター
- dwKeySize
- Int32
使用するキーのサイズ (ビット単位)。
- 属性
例外
暗号化サービス プロバイダー (CSP) を取得できません。
例
次のコード例では、 を RSACryptoServiceProvider作成し、新しいキーを生成し、キー コンテナーに格納します。
using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
array<Byte>^ RSAEncrypt( array<Byte>^DataToEncrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding )
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider;
//Import the RSA Key information. This only needs
//toinclude the public key information.
RSAalg->ImportParameters( RSAKeyInfo );
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg->Encrypt( DataToEncrypt, DoOAEPPadding );
}
//Catch and display a CryptographicException
//to the console.
catch ( CryptographicException^ e )
{
Console::WriteLine( e->Message );
return nullptr;
}
}
array<Byte>^ RSADecrypt( array<Byte>^DataToDecrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding )
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider;
//Import the RSA Key information. This needs
//to include the private key information.
RSAalg->ImportParameters( RSAKeyInfo );
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg->Decrypt( DataToDecrypt, DoOAEPPadding );
}
//Catch and display a CryptographicException
//to the console.
catch ( CryptographicException^ e )
{
Console::WriteLine( e );
return nullptr;
}
}
int main()
{
try
{
//Create a UnicodeEncoder to convert between byte array and string.
UnicodeEncoding^ ByteConverter = gcnew UnicodeEncoding;
//Create byte arrays to hold original, encrypted, and decrypted data.
array<Byte>^dataToEncrypt = ByteConverter->GetBytes( "Data to Encrypt" );
array<Byte>^encryptedData;
array<Byte>^decryptedData;
//Create a new instance of RSACryptoServiceProvider to generate
//public and private key data. Pass an integer specifying a key-
//length of 2048.
RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( 2048 );
//Display the key-legth to the console.
Console::WriteLine( "A new key pair of legth {0} was created", RSAalg->KeySize );
//Pass the data to ENCRYPT, the public key information
//(using RSACryptoServiceProvider.ExportParameters(false),
//and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt( dataToEncrypt, RSAalg->ExportParameters( false ), false );
//Pass the data to DECRYPT, the private key information
//(using RSACryptoServiceProvider.ExportParameters(true),
//and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt( encryptedData, RSAalg->ExportParameters( true ), false );
//Display the decrypted plaintext to the console.
Console::WriteLine( "Decrypted plaintext: {0}", ByteConverter->GetString( decryptedData ) );
}
catch ( ArgumentNullException^ )
{
//Catch this exception in case the encryption did
//not succeed.
Console::WriteLine( "Encryption failed." );
}
}
using System;
using System.Security.Cryptography;
using System.Text;
class RSACSPSample
{
static void Main()
{
try
{
//Create a UnicodeEncoder to convert between byte array and string.
UnicodeEncoding ByteConverter = new UnicodeEncoding();
//Create byte arrays to hold original, encrypted, and decrypted data.
byte[] dataToEncrypt = ByteConverter.GetBytes("Data to Encrypt");
byte[] encryptedData;
byte[] decryptedData;
//Create a new instance of RSACryptoServiceProvider to generate
//public and private key data. Pass an integer specifying a key-
//length of 2048.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(2048);
//Display the key-legth to the console.
Console.WriteLine("A new key pair of legth {0} was created", RSAalg.KeySize);
//Pass the data to ENCRYPT, the public key information
//(using RSACryptoServiceProvider.ExportParameters(false),
//and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt,RSAalg.ExportParameters(false), false);
//Pass the data to DECRYPT, the private key information
//(using RSACryptoServiceProvider.ExportParameters(true),
//and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData,RSAalg.ExportParameters(true), false);
//Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));
}
catch(ArgumentNullException)
{
//Catch this exception in case the encryption did
//not succeed.
Console.WriteLine("Encryption failed.");
}
}
static public byte[] RSAEncrypt(byte[] DataToEncrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding)
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();
//Import the RSA Key information. This only needs
//toinclude the public key information.
RSAalg.ImportParameters(RSAKeyInfo);
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
return null;
}
}
static public byte[] RSADecrypt(byte[] DataToDecrypt, RSAParameters RSAKeyInfo,bool DoOAEPPadding)
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();
//Import the RSA Key information. This needs
//to include the private key information.
RSAalg.ImportParameters(RSAKeyInfo);
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.ToString());
return null;
}
}
}
Imports System.Security.Cryptography
Imports System.Text
Module RSACSPExample
Sub Main()
Try
'Create a UnicodeEncoder to convert between byte array and string.
Dim ByteConverter As New UnicodeEncoding
'Create byte arrays to hold original, encrypted, and decrypted data.
Dim dataToEncrypt As Byte() = ByteConverter.GetBytes("Data to Encrypt")
Dim encryptedData() As Byte
Dim decryptedData() As Byte
'Create a new instance of RSACryptoServiceProvider to generate
'public and private key data. Pass an integer specifying a key-
'length of 2048.
Dim RSAalg As New RSACryptoServiceProvider(2048)
'Display the key-legth to the console.
Console.WriteLine("A new key pair of legth {0} was created", RSAalg.KeySize)
'Pass the data to ENCRYPT, the public key information
'(using RSACryptoServiceProvider.ExportParameters(false),
'and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt, RSAalg.ExportParameters(False), False)
'Pass the data to DECRYPT, the private key information
'(using RSACryptoServiceProvider.ExportParameters(true),
'and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData, RSAalg.ExportParameters(True), False)
'Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData))
Catch e As ArgumentNullException
'Catch this exception in case the encryption did
'not succeed.
Console.WriteLine("Encryption failed.")
End Try
End Sub
Function RSAEncrypt(ByVal DataToEncrypt() As Byte, ByVal RSAKeyInfo As RSAParameters, ByVal DoOAEPPadding As Boolean) As Byte()
Try
'Create a new instance of RSACryptoServiceProvider.
Dim RSAalg As New RSACryptoServiceProvider
'Import the RSA Key information. This only needs
'toinclude the public key information.
RSAalg.ImportParameters(RSAKeyInfo)
'Encrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
Return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding)
'Catch and display a CryptographicException
'to the console.
Catch e As CryptographicException
Console.WriteLine(e.Message)
Return Nothing
End Try
End Function
Function RSADecrypt(ByVal DataToDecrypt() As Byte, ByVal RSAKeyInfo As RSAParameters, ByVal DoOAEPPadding As Boolean) As Byte()
Try
'Create a new instance of RSACryptoServiceProvider.
Dim RSAalg As New RSACryptoServiceProvider
'Import the RSA Key information. This needs
'to include the private key information.
RSAalg.ImportParameters(RSAKeyInfo)
'Decrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
Return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding)
'Catch and display a CryptographicException
'to the console.
Catch e As CryptographicException
Console.WriteLine(e.ToString())
Return Nothing
End Try
End Function
End Module
注釈
このコンストラクターは、セッション キーを Exchange 暗号化するのに適したキー ペアを作成し、他のユーザーと安全に格納および交換できるようにします。 生成されたキーは、アンマネージド Microsoft Cryptographic API (CAPI) で使用される値を使用して AT_KEYEXCHANGE 生成されたキーに対応します。
このコンストラクターは、新しい公開キーと秘密キーペアをすぐに生成しません。
キーが必要になる前に ImportParameters 、 メソッドまたはその他のキー インポート メソッドを介してキーが読み込まれない dwKeySize場合は、必要に応じて -bit エフェメラル キーが作成されます。
こちらもご覧ください
適用対象
RSACryptoServiceProvider(CspParameters)
指定したパラメーターを使用して、RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。
public:
RSACryptoServiceProvider(System::Security::Cryptography::CspParameters ^ parameters);[System.Runtime.Versioning.SupportedOSPlatform("windows")]
public RSACryptoServiceProvider (System.Security.Cryptography.CspParameters? parameters);public RSACryptoServiceProvider (System.Security.Cryptography.CspParameters parameters);[<System.Runtime.Versioning.SupportedOSPlatform("windows")>]
new System.Security.Cryptography.RSACryptoServiceProvider : System.Security.Cryptography.CspParameters -> System.Security.Cryptography.RSACryptoServiceProvidernew System.Security.Cryptography.RSACryptoServiceProvider : System.Security.Cryptography.CspParameters -> System.Security.Cryptography.RSACryptoServiceProviderPublic Sub New (parameters As CspParameters)パラメーター
- parameters
- CspParameters
暗号化サービス プロバイダー (CSP) に渡すパラメーター。
- 属性
例外
CSP を取得できません。
例
次のコード例では、オブジェクトを RSACryptoServiceProvider 作成し、新しいキーを生成し、キー コンテナーに格納します。
using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
void RSAPersistKeyInCSP( String^ ContainerName )
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters^ cspParams = gcnew CspParameters;
// Specify the container name using the passed variable.
cspParams->KeyContainerName = ContainerName;
//Create a new instance of RSACryptoServiceProvider to generate
//a new key pair. Pass the CspParameters class to persist the
//key in the container.
RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( cspParams );
//Indicate that the key was persisted.
Console::WriteLine( "The RSA key was persisted in the container, \"{0}\".", ContainerName );
}
catch ( CryptographicException^ e )
{
Console::WriteLine( e->Message );
}
}
void RSADeleteKeyInCSP( String^ ContainerName )
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters^ cspParams = gcnew CspParameters;
// Specify the container name using the passed variable.
cspParams->KeyContainerName = ContainerName;
//Create a new instance of RSACryptoServiceProvider.
//Pass the CspParameters class to use the
//key in the container.
RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( cspParams );
//Delete the key entry in the container.
RSAalg->PersistKeyInCsp = false;
//Call Clear to release resources and delete the key from the container.
RSAalg->Clear();
//Indicate that the key was persisted.
Console::WriteLine( "The RSA key was deleted from the container, \"{0}\".", ContainerName );
}
catch ( CryptographicException^ e )
{
Console::WriteLine( e->Message );
}
}
array<Byte>^ RSAEncrypt( array<Byte>^DataToEncrypt, String^ ContainerName, bool DoOAEPPadding )
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters^ cspParams = gcnew CspParameters;
// Specify the container name using the passed variable.
cspParams->KeyContainerName = ContainerName;
//Create a new instance of RSACryptoServiceProvider.
//Pass the CspParameters class to use the key
//from the key in the container.
RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( cspParams );
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg->Encrypt( DataToEncrypt, DoOAEPPadding );
}
//Catch and display a CryptographicException
//to the console.
catch ( CryptographicException^ e )
{
Console::WriteLine( e->Message );
return nullptr;
}
}
array<Byte>^ RSADecrypt( array<Byte>^DataToDecrypt, String^ ContainerName, bool DoOAEPPadding )
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters^ cspParams = gcnew CspParameters;
// Specify the container name using the passed variable.
cspParams->KeyContainerName = ContainerName;
//Create a new instance of RSACryptoServiceProvider.
//Pass the CspParameters class to use the key
//from the key in the container.
RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( cspParams );
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg->Decrypt( DataToDecrypt, DoOAEPPadding );
}
//Catch and display a CryptographicException
//to the console.
catch ( CryptographicException^ e )
{
Console::WriteLine( e );
return nullptr;
}
}
int main()
{
try
{
String^ KeyContainerName = "MyKeyContainer";
//Create a new key and persist it in
//the key container.
RSAPersistKeyInCSP( KeyContainerName );
//Create a UnicodeEncoder to convert between byte array and string.
UnicodeEncoding^ ByteConverter = gcnew UnicodeEncoding;
//Create byte arrays to hold original, encrypted, and decrypted data.
array<Byte>^dataToEncrypt = ByteConverter->GetBytes( "Data to Encrypt" );
array<Byte>^encryptedData;
array<Byte>^decryptedData;
//Pass the data to ENCRYPT, the name of the key container,
//and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt( dataToEncrypt, KeyContainerName, false );
//Pass the data to DECRYPT, the name of the key container,
//and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt( encryptedData, KeyContainerName, false );
//Display the decrypted plaintext to the console.
Console::WriteLine( "Decrypted plaintext: {0}", ByteConverter->GetString( decryptedData ) );
RSADeleteKeyInCSP( KeyContainerName );
}
catch ( ArgumentNullException^ )
{
//Catch this exception in case the encryption did
//not succeed.
Console::WriteLine( "Encryption failed." );
}
}
using System;
using System.Security.Cryptography;
using System.Text;
class RSACSPSample
{
static void Main()
{
try
{
string KeyContainerName = "MyKeyContainer";
//Create a new key and persist it in
//the key container.
RSAPersistKeyInCSP(KeyContainerName);
//Create a UnicodeEncoder to convert between byte array and string.
UnicodeEncoding ByteConverter = new UnicodeEncoding();
//Create byte arrays to hold original, encrypted, and decrypted data.
byte[] dataToEncrypt = ByteConverter.GetBytes("Data to Encrypt");
byte[] encryptedData;
byte[] decryptedData;
//Pass the data to ENCRYPT, the name of the key container,
//and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt,KeyContainerName, false);
//Pass the data to DECRYPT, the name of the key container,
//and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData,KeyContainerName, false);
//Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));
RSADeleteKeyInCSP(KeyContainerName);
}
catch(ArgumentNullException)
{
//Catch this exception in case the encryption did
//not succeed.
Console.WriteLine("Encryption failed.");
}
}
public static void RSAPersistKeyInCSP(string ContainerName)
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters cspParams = new CspParameters();
// Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName;
//Create a new instance of RSACryptoServiceProvider to generate
//a new key pair. Pass the CspParameters class to persist the
//key in the container.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);
//Indicate that the key was persisted.
Console.WriteLine("The RSA key was persisted in the container, \"{0}\".", ContainerName);
}
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
}
}
public static void RSADeleteKeyInCSP(string ContainerName)
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters cspParams = new CspParameters();
// Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName;
//Create a new instance of RSACryptoServiceProvider.
//Pass the CspParameters class to use the
//key in the container.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);
//Delete the key entry in the container.
RSAalg.PersistKeyInCsp = false;
//Call Clear to release resources and delete the key from the container.
RSAalg.Clear();
//Indicate that the key was persisted.
Console.WriteLine("The RSA key was deleted from the container, \"{0}\".", ContainerName);
}
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
}
}
static public byte[] RSAEncrypt(byte[] DataToEncrypt, string ContainerName, bool DoOAEPPadding)
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters cspParams = new CspParameters();
// Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName;
//Create a new instance of RSACryptoServiceProvider.
//Pass the CspParameters class to use the key
//from the key in the container.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
return null;
}
}
static public byte[] RSADecrypt(byte[] DataToDecrypt, string ContainerName, bool DoOAEPPadding)
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters cspParams = new CspParameters();
// Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName;
//Create a new instance of RSACryptoServiceProvider.
//Pass the CspParameters class to use the key
//from the key in the container.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.ToString());
return null;
}
}
}
Imports System.Security.Cryptography
Imports System.Text
Module RSACSPExample
Sub Main()
Try
Dim KeyContainerName As String = "MyKeyContainer"
'Create a new key and persist it in
'the key container.
RSAPersistKeyInCSP(KeyContainerName)
'Create a UnicodeEncoder to convert between byte array and string.
Dim ByteConverter As New UnicodeEncoding
'Create byte arrays to hold original, encrypted, and decrypted data.
Dim dataToEncrypt As Byte() = ByteConverter.GetBytes("Data to Encrypt")
Dim encryptedData() As Byte
Dim decryptedData() As Byte
'Pass the data to ENCRYPT, the name of the key container,
'and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt, KeyContainerName, False)
'Pass the data to DECRYPT, the name of the key container,
'and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData, KeyContainerName, False)
'Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData))
RSADeleteKeyInCSP(KeyContainerName)
Catch e As ArgumentNullException
'Catch this exception in case the encryption did
'not succeed.
Console.WriteLine("Encryption failed.")
End Try
End Sub
Sub RSAPersistKeyInCSP(ByVal ContainerName As String)
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters
' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName
'Create a new instance of RSACryptoServiceProvider to generate
'a new key pair. Pass the CspParameters class to persist the
'key in the container.
Dim RSAalg As New RSACryptoServiceProvider(cspParams)
'Indicate that the key was persisted.
Console.WriteLine("The RSA key was persisted in the container, ""{0}"".", ContainerName)
Catch e As CryptographicException
Console.WriteLine(e.Message)
End Try
End Sub
Sub RSADeleteKeyInCSP(ByVal ContainerName As String)
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters
' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName
'Create a new instance of RSACryptoServiceProvider.
'Pass the CspParameters class to use the
'key in the container.
Dim RSAalg As New RSACryptoServiceProvider(cspParams)
'Delete the key entry in the container.
RSAalg.PersistKeyInCsp = False
'Call Clear to release resources and delete the key from the container.
RSAalg.Clear()
'Indicate that the key was persisted.
Console.WriteLine("The RSA key was deleted from the container, ""{0}"".", ContainerName)
Catch e As CryptographicException
Console.WriteLine(e.Message)
End Try
End Sub
Function RSAEncrypt(ByVal DataToEncrypt() As Byte, ByVal ContainerName As String, ByVal DoOAEPPadding As Boolean) As Byte()
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters
' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName
'Create a new instance of RSACryptoServiceProvider.
'Pass the CspParameters class to use the key
'from the key in the container.
Dim RSAalg As New RSACryptoServiceProvider(cspParams)
'Encrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
Return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding)
'Catch and display a CryptographicException
'to the console.
Catch e As CryptographicException
Console.WriteLine(e.Message)
Return Nothing
End Try
End Function
Function RSADecrypt(ByVal DataToDecrypt() As Byte, ByVal ContainerName As String, ByVal DoOAEPPadding As Boolean) As Byte()
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters
' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName
'Create a new instance of RSACryptoServiceProvider.
'Pass the CspParameters class to use the key
'from the key in the container.
Dim RSAalg As New RSACryptoServiceProvider(cspParams)
'Decrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
Return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding)
'Catch and display a CryptographicException
'to the console.
Catch e As CryptographicException
Console.WriteLine(e.ToString())
Return Nothing
End Try
End Function
End Module
注釈
このコンストラクターは、 パラメーターの フィールドparametersを使用して指定されたキー コンテナーをKeyContainerName作成または再利用します。
既定では、このコンストラクターはセッション キーを Exchange 暗号化するのに適したキー ペアを作成し、他のユーザーと安全に格納および交換できるようにします。 生成されたキーは、アンマネージド Microsoft Cryptographic API (CAPI) で使用される値を使用して AT_KEYEXCHANGE 生成されたキーに対応します。
パラメーターの フィールドを Signature 値に設定KeyNumberすることで、メッセージまたはファイルの認証 (デジタル署名) に適したキー ペアをparametersSignature作成できます。 この種類のキーは、CAPI で使用される値に対応します AT_SIGNATURE 。
値を指定してオブジェクトをRSACryptoServiceProviderExchange作成し、その値を指定して別RSACryptoServiceProviderのオブジェクトをSignature作成すると、両方のオブジェクトが同じキー コンテナー名を指定した場合、両方のキーが 1 つのコンテナーに配置されます。
クラスを使用して厳密な名前の署名と互換性のあるキーを RSACryptoServiceProvider 作成するには、キー ペアを作成する Signature 必要があります。
こちらもご覧ください
適用対象
RSACryptoServiceProvider(Int32, CspParameters)
指定されたキー サイズおよびパラメーターを使用して、RSACryptoServiceProvider クラスの新しいインスタンスを初期化します。
public:
RSACryptoServiceProvider(int dwKeySize, System::Security::Cryptography::CspParameters ^ parameters);[System.Runtime.Versioning.SupportedOSPlatform("windows")]
public RSACryptoServiceProvider (int dwKeySize, System.Security.Cryptography.CspParameters? parameters);public RSACryptoServiceProvider (int dwKeySize, System.Security.Cryptography.CspParameters parameters);[<System.Runtime.Versioning.SupportedOSPlatform("windows")>]
new System.Security.Cryptography.RSACryptoServiceProvider : int * System.Security.Cryptography.CspParameters -> System.Security.Cryptography.RSACryptoServiceProvidernew System.Security.Cryptography.RSACryptoServiceProvider : int * System.Security.Cryptography.CspParameters -> System.Security.Cryptography.RSACryptoServiceProviderPublic Sub New (dwKeySize As Integer, parameters As CspParameters)パラメーター
- dwKeySize
- Int32
使用するキーのサイズ (ビット単位)。
- parameters
- CspParameters
暗号化サービス プロバイダー (CSP) に渡すパラメーター。
- 属性
例外
例
次のコード例では、 を RSACryptoServiceProvider作成し、新しいキーを生成し、キー コンテナーに格納します。
using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
void RSAPersistKeyInCSP( String^ ContainerName )
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters^ cspParams = gcnew CspParameters;
// Specify the container name using the passed variable.
cspParams->KeyContainerName = ContainerName;
//Create a new instance of RSACryptoServiceProvider to generate
//a new key pair. Pass the CspParameters class to persist the
//key in the container. Pass an intger of 2048 to specify the
//key-size.
RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( 2048,cspParams );
//Indicate that the key was persisted.
Console::WriteLine( "The RSA key with a key-size of {0} was persisted in the container, \"{1}\".", RSAalg->KeySize, ContainerName );
}
catch ( CryptographicException^ e )
{
Console::WriteLine( e->Message );
}
}
void RSADeleteKeyInCSP( String^ ContainerName )
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters^ cspParams = gcnew CspParameters;
// Specify the container name using the passed variable.
cspParams->KeyContainerName = ContainerName;
//Create a new instance of DSACryptoServiceProvider.
//Pass the CspParameters class to use the
//key in the container.
RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( cspParams );
//Delete the key entry in the container.
RSAalg->PersistKeyInCsp = false;
//Call Clear to release resources and delete the key from the container.
RSAalg->Clear();
//Indicate that the key was persisted.
Console::WriteLine( "The RSA key was deleted from the container, \"{0}\".", ContainerName );
}
catch ( CryptographicException^ e )
{
Console::WriteLine( e->Message );
}
}
array<Byte>^ RSAEncrypt( array<Byte>^DataToEncrypt, String^ ContainerName, bool DoOAEPPadding )
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters^ cspParams = gcnew CspParameters;
// Specify the container name using the passed variable.
cspParams->KeyContainerName = ContainerName;
//Create a new instance of DSACryptoServiceProvider.
//Pass the CspParameters class to use the key
//from the key in the container.
RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( cspParams );
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg->Encrypt( DataToEncrypt, DoOAEPPadding );
}
//Catch and display a CryptographicException
//to the console.
catch ( CryptographicException^ e )
{
Console::WriteLine( e->Message );
return nullptr;
}
}
array<Byte>^ RSADecrypt( array<Byte>^DataToDecrypt, String^ ContainerName, bool DoOAEPPadding )
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters^ cspParams = gcnew CspParameters;
// Specify the container name using the passed variable.
cspParams->KeyContainerName = ContainerName;
//Create a new instance of DSACryptoServiceProvider.
//Pass the CspParameters class to use the key
//from the key in the container.
RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( cspParams );
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg->Decrypt( DataToDecrypt, DoOAEPPadding );
}
//Catch and display a CryptographicException
//to the console.
catch ( CryptographicException^ e )
{
Console::WriteLine( e );
return nullptr;
}
}
int main()
{
try
{
String^ KeyContainerName = "MyKeyContainer";
//Create a new key and persist it in
//the key container.
RSAPersistKeyInCSP( KeyContainerName );
//Create a UnicodeEncoder to convert between byte array and string.
UnicodeEncoding^ ByteConverter = gcnew UnicodeEncoding;
//Create byte arrays to hold original, encrypted, and decrypted data.
array<Byte>^dataToEncrypt = ByteConverter->GetBytes( "Data to Encrypt" );
array<Byte>^encryptedData;
array<Byte>^decryptedData;
//Pass the data to ENCRYPT, the name of the key container,
//and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt( dataToEncrypt, KeyContainerName, false );
//Pass the data to DECRYPT, the name of the key container,
//and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt( encryptedData, KeyContainerName, false );
//Display the decrypted plaintext to the console.
Console::WriteLine( "Decrypted plaintext: {0}", ByteConverter->GetString( decryptedData ) );
RSADeleteKeyInCSP( KeyContainerName );
}
catch ( ArgumentNullException^ )
{
//Catch this exception in case the encryption did
//not succeed.
Console::WriteLine( "Encryption failed." );
}
}
using System;
using System.Security.Cryptography;
using System.Text;
class RSACSPSample
{
static void Main()
{
try
{
string KeyContainerName = "MyKeyContainer";
//Create a new key and persist it in
//the key container.
RSAPersistKeyInCSP(KeyContainerName);
//Create a UnicodeEncoder to convert between byte array and string.
UnicodeEncoding ByteConverter = new UnicodeEncoding();
//Create byte arrays to hold original, encrypted, and decrypted data.
byte[] dataToEncrypt = ByteConverter.GetBytes("Data to Encrypt");
byte[] encryptedData;
byte[] decryptedData;
//Pass the data to ENCRYPT, the name of the key container,
//and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt,KeyContainerName, false);
//Pass the data to DECRYPT, the name of the key container,
//and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData,KeyContainerName, false);
//Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));
RSADeleteKeyInCSP(KeyContainerName);
}
catch(ArgumentNullException)
{
//Catch this exception in case the encryption did
//not succeed.
Console.WriteLine("Encryption failed.");
}
}
public static void RSAPersistKeyInCSP(string ContainerName)
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters cspParams = new CspParameters();
// Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName;
//Create a new instance of RSACryptoServiceProvider to generate
//a new key pair. Pass the CspParameters class to persist the
//key in the container. Pass an intger of 2048 to specify the
//key-size.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider( 2048, cspParams);
//Indicate that the key was persisted.
Console.WriteLine("The RSA key with a key-size of {0} was persisted in the container, \"{1}\".",
RSAalg.KeySize , ContainerName);
}
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
}
}
public static void RSADeleteKeyInCSP(string ContainerName)
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters cspParams = new CspParameters();
// Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName;
//Create a new instance of DSACryptoServiceProvider.
//Pass the CspParameters class to use the
//key in the container.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);
//Delete the key entry in the container.
RSAalg.PersistKeyInCsp = false;
//Call Clear to release resources and delete the key from the container.
RSAalg.Clear();
//Indicate that the key was persisted.
Console.WriteLine("The RSA key was deleted from the container, \"{0}\".", ContainerName);
}
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
}
}
static public byte[] RSAEncrypt(byte[] DataToEncrypt, string ContainerName, bool DoOAEPPadding)
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters cspParams = new CspParameters();
// Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName;
//Create a new instance of DSACryptoServiceProvider.
//Pass the CspParameters class to use the key
//from the key in the container.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
return null;
}
}
static public byte[] RSADecrypt(byte[] DataToDecrypt, string ContainerName, bool DoOAEPPadding)
{
try
{
// Create a new instance of CspParameters. Pass
// 13 to specify a DSA container or 1 to specify
// an RSA container. The default is 1.
CspParameters cspParams = new CspParameters();
// Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName;
//Create a new instance of DSACryptoServiceProvider.
//Pass the CspParameters class to use the key
//from the key in the container.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(cspParams);
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.ToString());
return null;
}
}
}
Imports System.Security.Cryptography
Imports System.Text
Module RSACSPExample
Sub Main()
Try
Dim KeyContainerName As String = "MyKeyContainer"
'Create a new key and persist it in
'the key container.
RSAPersistKeyInCSP(KeyContainerName)
'Create a UnicodeEncoder to convert between byte array and string.
Dim ByteConverter As New UnicodeEncoding
'Create byte arrays to hold original, encrypted, and decrypted data.
Dim dataToEncrypt As Byte() = ByteConverter.GetBytes("Data to Encrypt")
Dim encryptedData() As Byte
Dim decryptedData() As Byte
'Pass the data to ENCRYPT, the name of the key container,
'and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt, KeyContainerName, False)
'Pass the data to DECRYPT, the name of the key container,
'and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData, KeyContainerName, False)
'Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData))
RSADeleteKeyInCSP(KeyContainerName)
Catch e As ArgumentNullException
'Catch this exception in case the encryption did
'not succeed.
Console.WriteLine("Encryption failed.")
End Try
End Sub
Sub RSAPersistKeyInCSP(ByVal ContainerName As String)
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters
' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName
'Create a new instance of RSACryptoServiceProvider to generate
'a new key pair. Pass the CspParameters class to persist the
'key in the container.
Dim RSAalg As New RSACryptoServiceProvider(2048, cspParams)
'Indicate that the key was persisted.
Console.WriteLine("The RSA key with a key-size of {0} was persisted in the container, ""{1}"".", _
RSAalg.KeySize, ContainerName)
Catch e As CryptographicException
Console.WriteLine(e.Message)
End Try
End Sub
Sub RSADeleteKeyInCSP(ByVal ContainerName As String)
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters
' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName
'Create a new instance of RSACryptoServiceProvider.
'Pass the CspParameters class to use the
'key in the container.
Dim RSAalg As New RSACryptoServiceProvider(cspParams)
'Delete the key entry in the container.
RSAalg.PersistKeyInCsp = False
'Call Clear to release resources and delete the key from the container.
RSAalg.Clear()
'Indicate that the key was persisted.
Console.WriteLine("The RSA key was deleted from the container, ""{0}"".", ContainerName)
Catch e As CryptographicException
Console.WriteLine(e.Message)
End Try
End Sub
Function RSAEncrypt(ByVal DataToEncrypt() As Byte, ByVal ContainerName As String, ByVal DoOAEPPadding As Boolean) As Byte()
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters
' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName
'Create a new instance of RSACryptoServiceProvider.
'Pass the CspParameters class to use the key
'from the key in the container.
Dim RSAalg As New RSACryptoServiceProvider(cspParams)
'Encrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
Return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding)
'Catch and display a CryptographicException
'to the console.
Catch e As CryptographicException
Console.WriteLine(e.Message)
Return Nothing
End Try
End Function
Function RSADecrypt(ByVal DataToDecrypt() As Byte, ByVal ContainerName As String, ByVal DoOAEPPadding As Boolean) As Byte()
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters
' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName
'Create a new instance of RSACryptoServiceProvider.
'Pass the CspParameters class to use the key
'from the key in the container.
Dim RSAalg As New RSACryptoServiceProvider(cspParams)
'Decrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
Return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding)
'Catch and display a CryptographicException
'to the console.
Catch e As CryptographicException
Console.WriteLine(e.ToString())
Return Nothing
End Try
End Function
End Module
注釈
このコンストラクターは、 パラメーターの フィールドparametersを使用して指定されたキー コンテナーをKeyContainerName作成または再利用します。
既定では、このコンストラクターはセッション キーを Exchange 暗号化するのに適したキー ペアを作成し、他のユーザーと安全に格納および交換できるようにします。 生成されたキーは、アンマネージド Microsoft Cryptographic API (CAPI) で使用される値を使用して AT_KEYEXCHANGE 生成されたキーに対応します。
パラメーターの フィールドを Signature 値に設定KeyNumberすることで、メッセージまたはファイルの認証 (デジタル署名) に適したキー ペアをparametersSignature作成できます。 この種類のキーは、CAPI で使用される値に対応します AT_SIGNATURE 。
値を指定してオブジェクトをRSACryptoServiceProviderExchange作成し、その値を指定して別RSACryptoServiceProviderのオブジェクトをSignature作成すると、両方のオブジェクトが同じキー コンテナー名を指定した場合、両方のキーが 1 つのコンテナーに配置されます。
クラスを使用して厳密な名前の署名と互換性のあるキーを RSACryptoServiceProvider 作成するには、キー ペアを作成する Signature 必要があります。
こちらもご覧ください
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