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RSACryptoServiceProvider.Encrypt Método

  • Referencia

Definición

Espacio de nombres:
System.Security.Cryptography
Ensamblado:
System.Security.Cryptography.Csp.dll
Ensamblado:
System.Security.Cryptography.dll
Ensamblado:
mscorlib.dll
Ensamblado:
netstandard.dll

Cifra los datos con el algoritmo RSA.

Sobrecargas

Encrypt(Byte[], Boolean)

Cifra los datos con el algoritmo RSA.
Encrypt(Byte[], RSAEncryptionPadding)

Cifra los datos con el algoritmo RSA utilizando el relleno especificado.

Encrypt(Byte[], Boolean)

Source:
RSACryptoServiceProvider.Unix.cs
Source:
RSACryptoServiceProvider.Unix.cs
Source:
RSACryptoServiceProvider.Unix.cs

Cifra los datos con el algoritmo RSA.

public:
 cli::array <System::Byte> ^ Encrypt(cli::array <System::Byte> ^ rgb, bool fOAEP);
public byte[] Encrypt (byte[] rgb, bool fOAEP);
override this.Encrypt : byte[] * bool -> byte[]
member this.Encrypt : byte[] * bool -> byte[]
Public Function Encrypt (rgb As Byte(), fOAEP As Boolean) As Byte()

Parámetros

rgb
Byte[]

Datos que se van a cifrar.

fOAEP
Boolean

true para realizar el cifrado RSA directo mediante el relleno de OAEP (solo disponible en equipos con Windows XP o versiones posteriores); de lo contrario, false para usar el relleno PKCS#1 v1.5.

Devoluciones

Byte[]

Datos cifrados.

Excepciones

CryptographicException

No se puede adquirir el proveedor de servicios criptográficos (CSP).

o bien

La longitud del parámetro rgb es mayor que la longitud máxima permitida.

ArgumentNullException

rgb es null.

Ejemplos

En el ejemplo de código siguiente se inicializa un RSACryptoServiceProvider objeto en el valor de una clave pública (enviada por otra parte), se genera una clave de sesión mediante el Aes algoritmo y, a continuación, se cifra la clave de sesión mediante el RSACryptoServiceProvider objeto . Con este esquema, la clave de sesión se podría devolver al propietario de la clave RSA privada y las dos partes podrían usar la clave de sesión para intercambiar datos cifrados.

#using <System.dll>

using namespace System;
using namespace System::Security::Cryptography;
int main()
{
   try
   {
      
      //initialze the Byte arrays to the public key information.
      array<Byte>^PublicKey = {214,46,220,83,160,73,40,39,201,155,19,202,3,11,191,178,56,74,90,36,248,103,18,144,170,163,145,87,54,61,34,220,222,207,137,149,173,14,92,120,206,222,158,28,40,24,30,16,175,108,128,35,230,118,40,121,113,125,216,130,11,24,90,48,194,240,105,44,76,34,57,249,228,125,80,38,9,136,29,117,207,139,168,181,85,137,126,10,126,242,120,247,121,8,100,12,201,171,38,226,193,180,190,117,177,87,143,242,213,11,44,180,113,93,106,99,179,68,175,211,164,116,64,148,226,254,172,147};
      array<Byte>^Exponent = {1,0,1};
      
      //Values to store encrypted symmetric keys.
      array<Byte>^EncryptedSymmetricKey;
      array<Byte>^EncryptedSymmetricIV;
      
      //Create a new instance of RSACryptoServiceProvider.
      RSACryptoServiceProvider^ RSA = gcnew RSACryptoServiceProvider;
      
      //Create a new instance of RSAParameters.
      RSAParameters RSAKeyInfo;
      
      //Set RSAKeyInfo to the public key values. 
      RSAKeyInfo.Modulus = PublicKey;
      RSAKeyInfo.Exponent = Exponent;
      
      //Import key parameters into RSA.
      RSA->ImportParameters( RSAKeyInfo );
      
      //Create a new instance of the Aes class.
      Aes^ aes = Aes::Create();
      
      //Encrypt the symmetric key and IV.
      EncryptedSymmetricKey = RSA->Encrypt( aes->Key, false );
      EncryptedSymmetricIV = RSA->Encrypt( aes->IV, false );
      Console::WriteLine( "Aes Key and IV have been encrypted with RSACryptoServiceProvider." );
   }
   catch ( CryptographicException^ e ) 
   {
      
      //Catch and display a CryptographicException  
      //to the console.
      Console::WriteLine( e->Message );
   }

}

using System;
using System.Security.Cryptography;

class RSACSPSample
{

    static void Main()
    {
        try
        {		//initialze the byte arrays to the public key information.
            byte[] PublicKey = {214,46,220,83,160,73,40,39,201,155,19,202,3,11,191,178,56,
                                   74,90,36,248,103,18,144,170,163,145,87,54,61,34,220,222,
                                   207,137,149,173,14,92,120,206,222,158,28,40,24,30,16,175,
                                   108,128,35,230,118,40,121,113,125,216,130,11,24,90,48,194,
                                   240,105,44,76,34,57,249,228,125,80,38,9,136,29,117,207,139,
                                   168,181,85,137,126,10,126,242,120,247,121,8,100,12,201,171,
                                   38,226,193,180,190,117,177,87,143,242,213,11,44,180,113,93,
                                   106,99,179,68,175,211,164,116,64,148,226,254,172,147};

            byte[] Exponent = {1,0,1};
      
            //Values to store encrypted symmetric keys.
            byte[] EncryptedSymmetricKey;
            byte[] EncryptedSymmetricIV;

            //Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();

            //Create a new instance of RSAParameters.
            RSAParameters RSAKeyInfo = new RSAParameters();

            //Set RSAKeyInfo to the public key values. 
            RSAKeyInfo.Modulus = PublicKey;
            RSAKeyInfo.Exponent = Exponent;

            //Import key parameters into RSA.
            RSA.ImportParameters(RSAKeyInfo);

            //Create a new instance of the Aes class.
            Aes aes = Aes.Create();

            //Encrypt the symmetric key and IV.
            EncryptedSymmetricKey = RSA.Encrypt(aes.Key, false);
            EncryptedSymmetricIV = RSA.Encrypt(aes.IV, false);

            Console.WriteLine("Aes Key and IV have been encrypted with RSACryptoServiceProvider."); 
        }
        //Catch and display a CryptographicException  
        //to the console.
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);
        }
    }
}

Imports System.Security.Cryptography

Class RSACSPSample

    Shared Sub Main()
        Try
            'initialze the byte arrays to the public key information.
            Dim PublicKey As Byte() = {214, 46, 220, 83, 160, 73, 40, 39, 201, 155, 19, 202, 3, 11, 191, 178, 56, 74, 90, 36, 248, 103, 18, 144, 170, 163, 145, 87, 54, 61, 34, 220, 222, 207, 137, 149, 173, 14, 92, 120, 206, 222, 158, 28, 40, 24, 30, 16, 175, 108, 128, 35, 230, 118, 40, 121, 113, 125, 216, 130, 11, 24, 90, 48, 194, 240, 105, 44, 76, 34, 57, 249, 228, 125, 80, 38, 9, 136, 29, 117, 207, 139, 168, 181, 85, 137, 126, 10, 126, 242, 120, 247, 121, 8, 100, 12, 201, 171, 38, 226, 193, 180, 190, 117, 177, 87, 143, 242, 213, 11, 44, 180, 113, 93, 106, 99, 179, 68, 175, 211, 164, 116, 64, 148, 226, 254, 172, 147}

            Dim Exponent As Byte() = {1, 0, 1}

            'Values to store encrypted symmetric keys.
            Dim EncryptedSymmetricKey() As Byte
            Dim EncryptedSymmetricIV() As Byte

            'Create a new instance of RSACryptoServiceProvider.
            Dim RSA As New RSACryptoServiceProvider()

            'Create a new instance of RSAParameters.
            Dim RSAKeyInfo As New RSAParameters()

            'Set RSAKeyInfo to the public key values. 
            RSAKeyInfo.Modulus = PublicKey
            RSAKeyInfo.Exponent = Exponent

            'Import key parameters into RSA.
            RSA.ImportParameters(RSAKeyInfo)

            'Create a new instance of the Aes class.
            Dim aes As Aes = Aes.Create()

            'Encrypt the symmetric key and IV.
            EncryptedSymmetricKey = RSA.Encrypt(aes.Key, False)
            EncryptedSymmetricIV = RSA.Encrypt(aes.IV, False)

            Console.WriteLine("Aes Key and IV have been encrypted with RSA.")

            'Catch and display a CryptographicException  
            'to the console.
        Catch e As CryptographicException
            Console.WriteLine(e.Message)
        End Try
    End Sub
End Class

Comentarios

En la tabla siguiente se describe el relleno admitido por diferentes versiones de Microsoft Windows y la longitud máxima de rgb permitidas por las diferentes combinaciones de sistemas operativos y relleno.

Relleno Longitud máxima del parámetro rgb
Relleno de OAEP (PKCS#1 v2) Tamaño del módulo -2 -2*hLen, donde hLen es el tamaño del hash.
Cifrado directo (PKCS#1 v1.5) Tamaño del módulo - 11. (11 bytes es el relleno mínimo posible).

Use Decrypt para descifrar los resultados de este método.

Consulte también

Se aplica a

Encrypt(Byte[], RSAEncryptionPadding)

Source:
RSACryptoServiceProvider.Unix.cs
Source:
RSACryptoServiceProvider.Unix.cs
Source:
RSACryptoServiceProvider.Unix.cs

Cifra los datos con el algoritmo RSA utilizando el relleno especificado.

public:
 override cli::array <System::Byte> ^ Encrypt(cli::array <System::Byte> ^ data, System::Security::Cryptography::RSAEncryptionPadding ^ padding);
public override byte[] Encrypt (byte[] data, System.Security.Cryptography.RSAEncryptionPadding padding);
override this.Encrypt : byte[] * System.Security.Cryptography.RSAEncryptionPadding -> byte[]
Public Overrides Function Encrypt (data As Byte(), padding As RSAEncryptionPadding) As Byte()

Parámetros

data
Byte[]

Datos que se van a cifrar.

padding
RSAEncryptionPadding

Relleno.

Devoluciones

Byte[]

Datos cifrados.

Excepciones

ArgumentNullException

data es null.

O bien

padding es null.

CryptographicException

No se admite el modo de relleno.

Comentarios

padding debe ser RSAEncryptionPadding.Pkcs1 o RSAEncryptionPadding.OaepSHA1.

Se aplica a