RSACryptoServiceProvider Construtores
Definição
Importante
Algumas informações se referem a produtos de pré-lançamento que podem ser substancialmente modificados antes do lançamento. A Microsoft não oferece garantias, expressas ou implícitas, das informações aqui fornecidas.
Inicializa uma nova instância da classe RSACryptoServiceProvider.
Sobrecargas
| RSACryptoServiceProvider() |
Inicializa uma nova instância da classe RSACryptoServiceProvider com um par de chaves aleatório. |
| RSACryptoServiceProvider(Int32) |
Inicializa uma nova instância da classe RSACryptoServiceProvider com um par de chaves aleatório do tamanho de chave especificado. |
| RSACryptoServiceProvider(CspParameters) |
Inicializa uma nova instância da classe RSACryptoServiceProvider com os parâmetros especificados. |
| RSACryptoServiceProvider(Int32, CspParameters) |
Inicializa uma nova instância da classe RSACryptoServiceProvider com o parâmetro e o tamanho de chave especificados. |
RSACryptoServiceProvider()
Inicializa uma nova instância da classe RSACryptoServiceProvider com um par de chaves aleatório.
public:
RSACryptoServiceProvider();public RSACryptoServiceProvider ();[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public RSACryptoServiceProvider ();Public Sub New ()- Atributos
Exceções
O CSP (provedor de serviços de criptografia) não pode ser adquirido.
Exemplos
O exemplo de código a seguir usa a RSACryptoServiceProvider classe para criptografar uma cadeia de caracteres em uma matriz de bytes e, em seguida, descriptografar os bytes novamente em uma cadeia de caracteres.
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
Comentários
Esse construtor cria um Exchange par de chaves adequado para criptografar chaves de sessão para que elas possam ser armazenadas e trocadas com outros usuários com segurança. A chave gerada corresponde a uma chave gerada usando o AT_KEYEXCHANGE valor usado na CAPI (API Criptográfica da Microsoft) não gerenciada.
Esse construtor não gera um novo keypair público/privado imediatamente. Se nenhuma chave for carregada por meio do ImportParameters método ou qualquer outro método de importação de chave, antes que uma chave seja necessária, uma chave efêmera de 1024 bits será criada sob demanda.
Confira também
Aplica-se a
RSACryptoServiceProvider(Int32)
Inicializa uma nova instância da classe RSACryptoServiceProvider com um par de chaves aleatório do tamanho de chave 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)Parâmetros
- dwKeySize
- Int32
O tamanho da chave a ser usada em bits.
- Atributos
Exceções
O CSP (provedor de serviços de criptografia) não pode ser adquirido.
Exemplos
O exemplo de código a seguir cria um RSACryptoServiceProvider, gera uma nova chave e a armazena em um contêiner de chaves.
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
Comentários
Esse construtor cria um Exchange par de chaves adequado para criptografar chaves de sessão para que elas possam ser armazenadas e trocadas com outros usuários com segurança. A chave gerada corresponde a uma chave gerada usando o AT_KEYEXCHANGE valor usado na CAPI (API Criptográfica da Microsoft) não gerenciada.
Esse construtor não gera um novo keypair público/privado imediatamente.
Se nenhuma chave for carregada por meio do ImportParameters método ou qualquer outro método de importação de chave, antes que uma chave seja necessária, uma dwKeySizechave efêmera -bit será criada sob demanda.
Confira também
Aplica-se a
RSACryptoServiceProvider(CspParameters)
Inicializa uma nova instância da classe RSACryptoServiceProvider com os parâmetros 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)Parâmetros
- parameters
- CspParameters
Os parâmetros a serem passados para o CSP (Provedor de Serviços de Criptografia).
- Atributos
Exceções
Não é possível adquirir o CSP.
Exemplos
O exemplo de código a seguir cria um RSACryptoServiceProvider objeto, gera uma nova chave e a armazena em um contêiner de chaves.
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
Comentários
Esse construtor cria ou reutiliza um contêiner de chaves especificado usando o KeyContainerName campo do parameters parâmetro .
Por padrão, esse construtor cria um Exchange par de chaves adequado para criptografar chaves de sessão para que elas possam ser armazenadas e trocadas com outros usuários com segurança. A chave gerada corresponde a uma chave gerada usando o AT_KEYEXCHANGE valor usado na CAPI (API Criptográfica da Microsoft) não gerenciada.
Você pode criar um Signature par de chaves adequado para autenticar mensagens ou arquivos (assinados digitalmente) definindo o KeyNumber campo do parameters parâmetro como o Signature valor. Esse tipo de chave corresponde ao AT_SIGNATURE valor usado em CAPI.
Se você criar um RSACryptoServiceProvider objeto com o Exchange valor especificado e criar outro RSACryptoServiceProvider objeto com o Signature valor especificado, ambas as chaves serão colocadas em um único contêiner se ambos os objetos especificarem o mesmo nome de contêiner de chave.
Para criar uma chave compatível com a assinatura de nome forte usando a RSACryptoServiceProvider classe , você deve criar um Signature par de chaves.
Confira também
Aplica-se a
RSACryptoServiceProvider(Int32, CspParameters)
Inicializa uma nova instância da classe RSACryptoServiceProvider com o parâmetro e o tamanho de chave 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)Parâmetros
- dwKeySize
- Int32
O tamanho da chave a ser usada em bits.
- parameters
- CspParameters
Os parâmetros a serem passados para o CSP (Provedor de Serviços de Criptografia).
- Atributos
Exceções
Exemplos
O exemplo de código a seguir cria um RSACryptoServiceProvider, gera uma nova chave e a armazena em um contêiner de chaves.
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
Comentários
Esse construtor cria ou reutiliza um contêiner de chaves especificado usando o KeyContainerName campo do parameters parâmetro .
Por padrão, esse construtor cria um Exchange par de chaves adequado para criptografar chaves de sessão para que elas possam ser armazenadas e trocadas com outros usuários com segurança. A chave gerada corresponde a uma chave gerada usando o AT_KEYEXCHANGE valor usado na CAPI (API Criptográfica da Microsoft) não gerenciada.
Você pode criar um Signature par de chaves adequado para autenticar mensagens ou arquivos (assinados digitalmente) definindo o KeyNumber campo do parameters parâmetro como o Signature valor. Esse tipo de chave corresponde ao AT_SIGNATURE valor usado em CAPI.
Se você criar um RSACryptoServiceProvider objeto com o Exchange valor especificado e criar outro RSACryptoServiceProvider objeto com o Signature valor especificado, ambas as chaves serão colocadas em um único contêiner se ambos os objetos especificarem o mesmo nome de contêiner de chave.
Para criar uma chave compatível com a assinatura de nome forte usando a RSACryptoServiceProvider classe , você deve criar um Signature par de chaves.
Confira também
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