RSACryptoServiceProvider Constructores
Definición
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Inicializa una nueva instancia de la clase RSACryptoServiceProvider.
Sobrecargas
| RSACryptoServiceProvider() |
Inicializa una nueva instancia de la clase RSACryptoServiceProvider con un par de claves aleatorio. |
| RSACryptoServiceProvider(Int32) |
Inicializa una nueva instancia de la clase RSACryptoServiceProvider con un par de claves aleatorio del tamaño de clave especificado. |
| RSACryptoServiceProvider(CspParameters) |
Inicializa una nueva instancia de la clase RSACryptoServiceProvider con los parámetros especificados. |
| RSACryptoServiceProvider(Int32, CspParameters) |
Inicializa una nueva instancia de la clase RSACryptoServiceProvider con los parámetros y el tamaño de clave especificados. |
RSACryptoServiceProvider()
Inicializa una nueva instancia de la clase RSACryptoServiceProvider con un par de claves aleatorio.
public:
RSACryptoServiceProvider();public RSACryptoServiceProvider ();[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public RSACryptoServiceProvider ();Public Sub New ()- Atributos
Excepciones
No se puede adquirir el proveedor de servicios criptográficos (CSP).
Ejemplos
En el ejemplo de código siguiente se usa la RSACryptoServiceProvider clase para cifrar una cadena en una matriz de bytes y, a continuación, descifrar los bytes de nuevo en una cadena.
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
Comentarios
Este constructor crea un Exchange par de claves adecuado para cifrar las claves de sesión para que se puedan almacenar e intercambiar de forma segura con otros usuarios. La clave generada corresponde a una clave generada mediante el AT_KEYEXCHANGE valor utilizado en la API criptográfica de Microsoft (CAPI) no administrada.
Este constructor no genera inmediatamente una nueva clave pública o privada. Si no se carga ninguna clave a través del ImportParameters método , o cualquier otro método de importación de claves, antes de que se necesite una clave, se crea una clave efímera de 1024 bits a petición.
Consulte también
Se aplica a
RSACryptoServiceProvider(Int32)
Inicializa una nueva instancia de la clase RSACryptoServiceProvider con un par de claves aleatorio del tamaño de clave especificado.
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)Parámetros
- dwKeySize
- Int32
Tamaño de la clave que se va a usar en bits.
- Atributos
Excepciones
No se puede adquirir el proveedor de servicios criptográficos (CSP).
Ejemplos
En el ejemplo de código siguiente se crea , RSACryptoServiceProviderse genera una nueva clave y se almacena en un contenedor de claves.
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
Comentarios
Este constructor crea un Exchange par de claves adecuado para cifrar las claves de sesión para que se puedan almacenar e intercambiar de forma segura con otros usuarios. La clave generada corresponde a una clave generada mediante el AT_KEYEXCHANGE valor utilizado en la API criptográfica de Microsoft (CAPI) no administrada.
Este constructor no genera inmediatamente una nueva clave pública o privada.
Si no se carga ninguna clave a través del ImportParameters método o cualquier otro método de importación de claves, antes de que se necesite una clave, se crea una dwKeySizeclave efímera de bits a petición.
Consulte también
Se aplica a
RSACryptoServiceProvider(CspParameters)
Inicializa una nueva instancia de la clase RSACryptoServiceProvider con los parámetros especificados.
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)Parámetros
- parameters
- CspParameters
Parámetros que se pasan al proveedor de servicios criptográficos (CSP).
- Atributos
Excepciones
No se puede adquirir el CSP.
Ejemplos
En el ejemplo de código siguiente se crea un RSACryptoServiceProvider objeto , se genera una nueva clave y se almacena en un contenedor de claves.
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
Comentarios
Este constructor crea o reutiliza un contenedor de claves especificado mediante el KeyContainerName campo del parameters parámetro .
De forma predeterminada, este constructor crea un Exchange par de claves adecuado para cifrar las claves de sesión para que se puedan almacenar e intercambiar de forma segura con otros usuarios. La clave generada corresponde a una clave generada mediante el AT_KEYEXCHANGE valor utilizado en la API criptográfica de Microsoft (CAPI) no administrada.
Puede crear un Signature par de claves adecuado para autenticar (firmado digitalmente) mensajes o archivos estableciendo el KeyNumber campo del parameters parámetro en el Signature valor. Este tipo de clave corresponde al AT_SIGNATURE valor utilizado en CAPI.
Si crea un RSACryptoServiceProvider objeto con el Exchange valor especificado y, a continuación, crea otro RSACryptoServiceProvider objeto con el Signature valor especificado, ambas claves se colocarán en un único contenedor si ambos objetos especifican el mismo nombre de contenedor de claves.
Para crear una clave compatible con la firma de nombre seguro mediante la RSACryptoServiceProvider clase , debe crear un Signature par de claves.
Consulte también
Se aplica a
RSACryptoServiceProvider(Int32, CspParameters)
Inicializa una nueva instancia de la clase RSACryptoServiceProvider con los parámetros y el tamaño de clave especificados.
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)Parámetros
- dwKeySize
- Int32
Tamaño de la clave que se va a usar en bits.
- parameters
- CspParameters
Parámetros que se pasan al proveedor de servicios criptográficos (CSP).
- Atributos
Excepciones
Ejemplos
En el ejemplo de código siguiente se crea , RSACryptoServiceProviderse genera una nueva clave y se almacena en un contenedor de claves.
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
Comentarios
Este constructor crea o reutiliza un contenedor de claves especificado mediante el KeyContainerName campo del parameters parámetro .
De forma predeterminada, este constructor crea un Exchange par de claves adecuado para cifrar las claves de sesión para que se puedan almacenar e intercambiar de forma segura con otros usuarios. La clave generada corresponde a una clave generada mediante el AT_KEYEXCHANGE valor utilizado en la API criptográfica de Microsoft (CAPI) no administrada.
Puede crear un Signature par de claves adecuado para autenticar (firmado digitalmente) mensajes o archivos estableciendo el KeyNumber campo del parameters parámetro en el Signature valor. Este tipo de clave corresponde al AT_SIGNATURE valor utilizado en CAPI.
Si crea un RSACryptoServiceProvider objeto con el Exchange valor especificado y, a continuación, crea otro RSACryptoServiceProvider objeto con el Signature valor especificado, ambas claves se colocarán en un único contenedor si ambos objetos especifican el mismo nombre de contenedor de claves.
Para crear una clave compatible con la firma de nombre seguro mediante la RSACryptoServiceProvider clase , debe crear un Signature par de claves.
Consulte también
Se aplica a
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