RSACryptoServiceProvider-Konstruktor (Int32)
Initialisiert eine neue Instanz der RSACryptoServiceProvider-Klasse mit der angegebenen Schlüsselgröße.
Namespace: System.Security.Cryptography
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Sub New ( _
dwKeySize As Integer _
)
'Usage
Dim dwKeySize As Integer
Dim instance As New RSACryptoServiceProvider(dwKeySize)
public RSACryptoServiceProvider (
int dwKeySize
)
public:
RSACryptoServiceProvider (
int dwKeySize
)
public RSACryptoServiceProvider (
int dwKeySize
)
public function RSACryptoServiceProvider (
dwKeySize : int
)
Parameter
- dwKeySize
Die Größe des zu verwendenden Schlüssels in Bits.
Ausnahmen
| Ausnahmetyp | Bedingung |
|---|---|
Der CSP kann nicht ermittelt werden. |
Hinweise
Wenn kein Standardschlüssel gefunden werden kann, wird ein neuer Schlüssel erstellt.
Vom Konstruktor wird ein Exchange-Schlüsselpaar erstellt, das für die Verschlüsselung von Sitzungsschlüsseln geeignet ist, sodass diese sicher gespeichert und mit anderen Benutzern ausgetauscht werden können. Der generierte Schlüssel entspricht einem Schlüssel, der mit dem in der nicht verwalteten Microsoft Cryptographic API (CAPI) verwendeten AT_KEYEXCHANGE-Wert generiert wurde.
Beispiel
Im folgenden Codebeispiel wird ein RSACryptoServiceProvider erstellt, ein neuer Schlüssel generiert und dieser in einem Schlüsselcontainer gespeichert.
Imports System.Security.Cryptography
Imports System.Text
Module RSACSPExample
Sub Main()
Try
'Create a UnicodeEncoder to convert between byte array and string.
Dim ByteConverter As New UnicodeEncoding
'Create byte arrays to hold original, encrypted, and decrypted data.
Dim dataToEncrypt As Byte() = ByteConverter.GetBytes("Data to Encrypt")
Dim encryptedData() As Byte
Dim decryptedData() As Byte
'Create a new instance of RSACryptoServiceProvider to generate
'public and private key data. Pass an integer specifying a key-
'length of 2048.
Dim RSAalg As New RSACryptoServiceProvider(2048)
'Display the key-legth to the console.
Console.WriteLine("A new key pair of legth {0} was created", RSAalg.KeySize)
'Pass the data to ENCRYPT, the public key information
'(using RSACryptoServiceProvider.ExportParameters(false),
'and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt, RSAalg.ExportParameters(False), False)
'Pass the data to DECRYPT, the private key information
'(using RSACryptoServiceProvider.ExportParameters(true),
'and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData, RSAalg.ExportParameters(True), False)
'Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData))
Catch e As ArgumentNullException
'Catch this exception in case the encryption did
'not succeed.
Console.WriteLine("Encryption failed.")
End Try
End Sub 'Main
Function RSAEncrypt(ByVal DataToEncrypt() As Byte, ByVal RSAKeyInfo As RSAParameters, ByVal DoOAEPPadding As Boolean) As Byte()
Try
'Create a new instance of RSACryptoServiceProvider.
Dim RSAalg As New RSACryptoServiceProvider
'Import the RSA Key information. This only needs
'toinclude the public key information.
RSAalg.ImportParameters(RSAKeyInfo)
'Encrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
Return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding)
'Catch and display a CryptographicException
'to the console.
Catch e As CryptographicException
Console.WriteLine(e.Message)
Return Nothing
End Try
End Function
Function RSADecrypt(ByVal DataToDecrypt() As Byte, ByVal RSAKeyInfo As RSAParameters, ByVal DoOAEPPadding As Boolean) As Byte()
Try
'Create a new instance of RSACryptoServiceProvider.
Dim RSAalg As New RSACryptoServiceProvider
'Import the RSA Key information. This needs
'to include the private key information.
RSAalg.ImportParameters(RSAKeyInfo)
'Decrypt the passed byte array and specify OAEP padding.
'OAEP padding is only available on Microsoft Windows XP or
'later.
Return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding)
'Catch and display a CryptographicException
'to the console.
Catch e As CryptographicException
Console.WriteLine(e.ToString())
Return Nothing
End Try
End Function
End Module
using System;
using System.Security.Cryptography;
using System.Text;
class RSACSPSample
{
static void Main()
{
try
{
//Create a UnicodeEncoder to convert between byte array and string.
UnicodeEncoding ByteConverter = new UnicodeEncoding();
//Create byte arrays to hold original, encrypted, and decrypted data.
byte[] dataToEncrypt = ByteConverter.GetBytes("Data to Encrypt");
byte[] encryptedData;
byte[] decryptedData;
//Create a new instance of RSACryptoServiceProvider to generate
//public and private key data. Pass an integer specifying a key-
//length of 2048.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider(2048);
//Display the key-legth to the console.
Console.WriteLine("A new key pair of legth {0} was created", RSAalg.KeySize);
//Pass the data to ENCRYPT, the public key information
//(using RSACryptoServiceProvider.ExportParameters(false),
//and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt,RSAalg.ExportParameters(false), false);
//Pass the data to DECRYPT, the private key information
//(using RSACryptoServiceProvider.ExportParameters(true),
//and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData,RSAalg.ExportParameters(true), false);
//Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));
}
catch(ArgumentNullException)
{
//Catch this exception in case the encryption did
//not succeed.
Console.WriteLine("Encryption failed.");
}
}
static public byte[] RSAEncrypt(byte[] DataToEncrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding)
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();
//Import the RSA Key information. This only needs
//toinclude the public key information.
RSAalg.ImportParameters(RSAKeyInfo);
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg.Encrypt(DataToEncrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
return null;
}
}
static public byte[] RSADecrypt(byte[] DataToDecrypt, RSAParameters RSAKeyInfo,bool DoOAEPPadding)
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();
//Import the RSA Key information. This needs
//to include the private key information.
RSAalg.ImportParameters(RSAKeyInfo);
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg.Decrypt(DataToDecrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.ToString());
return null;
}
}
}
using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
array<Byte>^ RSAEncrypt( array<Byte>^DataToEncrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding )
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider;
//Import the RSA Key information. This only needs
//toinclude the public key information.
RSAalg->ImportParameters( RSAKeyInfo );
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg->Encrypt( DataToEncrypt, DoOAEPPadding );
}
//Catch and display a CryptographicException
//to the console.
catch ( CryptographicException^ e )
{
Console::WriteLine( e->Message );
return nullptr;
}
}
array<Byte>^ RSADecrypt( array<Byte>^DataToDecrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding )
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider;
//Import the RSA Key information. This needs
//to include the private key information.
RSAalg->ImportParameters( RSAKeyInfo );
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSAalg->Decrypt( DataToDecrypt, DoOAEPPadding );
}
//Catch and display a CryptographicException
//to the console.
catch ( CryptographicException^ e )
{
Console::WriteLine( e );
return nullptr;
}
}
int main()
{
try
{
//Create a UnicodeEncoder to convert between byte array and string.
UnicodeEncoding^ ByteConverter = gcnew UnicodeEncoding;
//Create byte arrays to hold original, encrypted, and decrypted data.
array<Byte>^dataToEncrypt = ByteConverter->GetBytes( "Data to Encrypt" );
array<Byte>^encryptedData;
array<Byte>^decryptedData;
//Create a new instance of RSACryptoServiceProvider to generate
//public and private key data. Pass an integer specifying a key-
//length of 2048.
RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider( 2048 );
//Display the key-legth to the console.
Console::WriteLine( "A new key pair of legth {0} was created", RSAalg->KeySize );
//Pass the data to ENCRYPT, the public key information
//(using RSACryptoServiceProvider.ExportParameters(false),
//and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt( dataToEncrypt, RSAalg->ExportParameters( false ), false );
//Pass the data to DECRYPT, the private key information
//(using RSACryptoServiceProvider.ExportParameters(true),
//and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt( encryptedData, RSAalg->ExportParameters( true ), false );
//Display the decrypted plaintext to the console.
Console::WriteLine( "Decrypted plaintext: {0}", ByteConverter->GetString( decryptedData ) );
}
catch ( ArgumentNullException^ )
{
//Catch this exception in case the encryption did
//not succeed.
Console::WriteLine( "Encryption failed." );
}
}
import System.*;
import System.Security.Cryptography.*;
import System.Text.*;
class RSACSPSample
{
public static void main(String[] args)
{
try {
// Create a UnicodeEncoder to convert between byte array and string.
UnicodeEncoding byteConverter = new UnicodeEncoding();
// Create byte arrays to hold original, encrypted, and decrypted
// data.
ubyte dataToEncrypt[] = byteConverter.GetBytes("Data to Encrypt");
ubyte encryptedData[];
ubyte decryptedData[];
// Create a new instance of RSACryptoServiceProvider to generate
// public and private key data. Pass an integer specifying a key-
// length of 2048.
RSACryptoServiceProvider rsaAlg = new RSACryptoServiceProvider(2048);
//Display the key-legth to the console.
Console.WriteLine("A new key pair of legth {0} was created",
System.Convert.ToString(rsaAlg.get_KeySize()));
// Pass the data to ENCRYPT, the public key information
// (using RSACryptoServiceProvider.ExportParameters(false),
// and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt,
rsaAlg.ExportParameters(false), false);
// Pass the data to DECRYPT, the private key information
// (using RSACryptoServiceProvider.ExportParameters(true),
// and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData,
rsaAlg.ExportParameters(true), false);
//Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}",
byteConverter.GetString(decryptedData));
}
catch (ArgumentNullException exp) {
// Catch this exception in case the encryption did
// not succeed.
Console.WriteLine("Encryption failed.");
}
} //main
public static ubyte[] RSAEncrypt(ubyte dataToEncrypt[],
RSAParameters rsaKeyInfo, boolean doOAEPPadding)
{
try {
// Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider rsaAlg = new RSACryptoServiceProvider();
// Import the RSA Key information. This only needs
// toinclude the public key information.
rsaAlg.ImportParameters(rsaKeyInfo);
// Encrypt the passed byte array and specify OAEP padding.
// OAEP padding is only available on Microsoft Windows XP or
// later.
return rsaAlg.Encrypt(dataToEncrypt, doOAEPPadding);
}
// Catch and display a CryptographicException
// to the console.
catch (CryptographicException e) {
Console.WriteLine(e.get_Message());
return null;
}
} //RSAEncrypt
public static ubyte[] RSADecrypt(ubyte dataToDecrypt[],
RSAParameters rsaKeyInfo, boolean doOAEPPadding)
{
try {
// Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider rsaAlg = new RSACryptoServiceProvider();
// Import the RSA Key information. This needs
// to include the private key information.
rsaAlg.ImportParameters(rsaKeyInfo);
// Decrypt the passed byte array and specify OAEP padding.
// OAEP padding is only available on Microsoft Windows XP or
// later.
return rsaAlg.Decrypt(dataToDecrypt, doOAEPPadding);
}
// Catch and display a CryptographicException
// to the console.
catch (CryptographicException e) {
Console.WriteLine(e.ToString());
return null;
}
} //RSADecrypt
} //RSACSPSample
.NET Framework-Sicherheit
- SecurityPermission für den Aufruf von nicht verwaltetem Code. Zugeordnete Enumeration: SecurityPermissionFlag.UnmanagedCode
Plattformen
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0
.NET Compact Framework
Unterstützt in: 2.0
Siehe auch
Referenz
RSACryptoServiceProvider-Klasse
RSACryptoServiceProvider-Member
System.Security.Cryptography-Namespace