RSACryptoServiceProvider.Decrypt Metodo

Origine:

RSACryptoServiceProvider.Unix.cs

Origine:

RSACryptoServiceProvider.Unix.cs

Origine:

RSACryptoServiceProvider.Unix.cs

public:
 cli::array <System::Byte> ^ Decrypt(cli::array <System::Byte> ^ rgb, bool fOAEP);

public byte[] Decrypt (byte[] rgb, bool fOAEP);

override this.Decrypt : byte[] * bool -> byte[]

member this.Decrypt : byte[] * bool -> byte[]

Public Function Decrypt (rgb As Byte(), fOAEP As Boolean) As Byte()

Parametri

Restituisce

Dati decrittografati, ovvero il testo normale originale prima della crittografia.

Eccezioni

Esempio

L'esempio di codice seguente crittografa e decrittografa i dati.

In questo esempio viene usata la classe. Tuttavia, la ASCIIEncodingUnicodeEncoding classe può essere preferibile in operazioni di dati di grandi dimensioni. Il valore crittografato può essere salvato come nvarchar tipo di dati in Microsoft SQL Server.

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
int main()
{
   try
   {
      
      //Create a UnicodeEncoder to convert between byte array and string.
      ASCIIEncoding^ ByteConverter = gcnew ASCIIEncoding;
      String^ dataString = "Data to Encrypt";
      
      //Create byte arrays to hold original, encrypted, and decrypted data.
      array<Byte>^dataToEncrypt = ByteConverter->GetBytes( dataString );
      array<Byte>^encryptedData;
      array<Byte>^decryptedData;
      
      //Create a new instance of the RSACryptoServiceProvider class 
      // and automatically create a new key-pair.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider;
      
      //Display the origianl data to the console.
      Console::WriteLine( "Original Data: {0}", dataString );
      
      //Encrypt the byte array and specify no OAEP padding.  
      //OAEP padding is only available on Microsoft Windows XP or
      //later.  
      encryptedData = RSAalg->Encrypt( dataToEncrypt, false );
      
      //Display the encrypted data to the console. 
      Console::WriteLine( "Encrypted Data: {0}", ByteConverter->GetString( encryptedData ) );
      
      //Pass the data to ENCRYPT and boolean flag specifying 
      //no OAEP padding.
      decryptedData = RSAalg->Decrypt( encryptedData, false );
      
      //Display the decrypted plaintext to the console. 
      Console::WriteLine( "Decrypted plaintext: {0}", ByteConverter->GetString( decryptedData ) );
   }
   catch ( CryptographicException^ e ) 
   {
      
      //Catch this exception in case the encryption did
      //not succeed.
      Console::WriteLine( e->Message );
   }

}

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.
            ASCIIEncoding ByteConverter = new ASCIIEncoding();

            string dataString = "Data to Encrypt";

            //Create byte arrays to hold original, encrypted, and decrypted data.
            byte[] dataToEncrypt = ByteConverter.GetBytes(dataString);
            byte[] encryptedData;
            byte[] decryptedData;

            //Create a new instance of the RSACryptoServiceProvider class
            // and automatically create a new key-pair.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();

            //Display the origianl data to the console.
            Console.WriteLine("Original Data: {0}", dataString);

            //Encrypt the byte array and specify no OAEP padding.
            //OAEP padding is only available on Microsoft Windows XP or
            //later.
            encryptedData = RSAalg.Encrypt(dataToEncrypt, false);

            //Display the encrypted data to the console.
            Console.WriteLine("Encrypted Data: {0}", ByteConverter.GetString(encryptedData));

            //Pass the data to ENCRYPT and boolean flag specifying
            //no OAEP padding.
            decryptedData = RSAalg.Decrypt(encryptedData, false);

            //Display the decrypted plaintext to the console.
            Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));
        }
        catch(CryptographicException e)
        {
            //Catch this exception in case the encryption did
            //not succeed.
            Console.WriteLine(e.Message);
        }
    }
}

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 ASCIIEncoding

            Dim dataString As String = "Data to Encrypt"

            'Create byte arrays to hold original, encrypted, and decrypted data.
            Dim dataToEncrypt As Byte() = ByteConverter.GetBytes(dataString)
            Dim encryptedData() As Byte
            Dim decryptedData() As Byte

            'Create a new instance of the RSACryptoServiceProvider class 
            ' and automatically create a new key-pair.
            Dim RSAalg As New RSACryptoServiceProvider

            'Display the origianl data to the console.
            Console.WriteLine("Original Data: {0}", dataString)

            'Encrypt the byte array and specify no OAEP padding.  
            'OAEP padding is only available on Microsoft Windows XP or
            'later.  
            encryptedData = RSAalg.Encrypt(dataToEncrypt, False)

            'Display the encrypted data to the console. 
            Console.WriteLine("Encrypted Data: {0}", ByteConverter.GetString(encryptedData))

            'Pass the data to ENCRYPT and boolean flag specifying 
            'no OAEP padding.
            decryptedData = RSAalg.Decrypt(encryptedData, False)

            'Display the decrypted plaintext to the console. 
            Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData))
        Catch e As CryptographicException
            'Catch this exception in case the encryption did
            'not succeed.
            Console.WriteLine(e.Message)
        End Try
    End Sub 

End Module

Commenti

Usare Encrypt per crittografare i dati per la decrittografia con questo metodo.

Vedi anche

• Decrypt(Byte[], RSAEncryptionPadding)
• servizi crittografici

Origine:

RSACryptoServiceProvider.Unix.cs

Origine:

RSACryptoServiceProvider.Unix.cs

Origine:

RSACryptoServiceProvider.Unix.cs

public:
 override cli::array <System::Byte> ^ Decrypt(cli::array <System::Byte> ^ data, System::Security::Cryptography::RSAEncryptionPadding ^ padding);

public override byte[] Decrypt (byte[] data, System.Security.Cryptography.RSAEncryptionPadding padding);

override this.Decrypt : byte[] * System.Security.Cryptography.RSAEncryptionPadding -> byte[]

Public Overrides Function Decrypt (data As Byte(), padding As RSAEncryptionPadding) As Byte()

Parametri

Restituisce

Dati decrittografati.

Eccezioni

Commenti

padding deve essere RSAEncryptionPadding.Pkcs1 o RSAEncryptionPadding.OaepSHA1.