RNGCryptoServiceProvider RNGCryptoServiceProvider RNGCryptoServiceProvider RNGCryptoServiceProvider Class

Définition

Implémente un générateur de nombres aléatoires (RNG) de chiffrement à l'aide de l'implémentation fournie par le fournisseur de services de chiffrement (CSP).Implements a cryptographic Random Number Generator (RNG) using the implementation provided by the cryptographic service provider (CSP). Cette classe ne peut pas être héritée.This class cannot be inherited.

public ref class RNGCryptoServiceProvider sealed : System::Security::Cryptography::RandomNumberGenerator
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class RNGCryptoServiceProvider : System.Security.Cryptography.RandomNumberGenerator
type RNGCryptoServiceProvider = class
    inherit RandomNumberGenerator
Public NotInheritable Class RNGCryptoServiceProvider
Inherits RandomNumberGenerator
Héritage
RNGCryptoServiceProviderRNGCryptoServiceProviderRNGCryptoServiceProviderRNGCryptoServiceProvider
Attributs

Exemples

L’exemple de code suivant montre comment créer un nombre aléatoire avec la RNGCryptoServiceProvider classe.The following code example shows how to create a random number with the RNGCryptoServiceProvider class.

//The following sample uses the Cryptography class to simulate the roll of a dice.

using namespace System;
using namespace System::IO;
using namespace System::Text;
using namespace System::Security::Cryptography;

ref class RNGCSP
{
public:
    // Main method.
    static void Main()
    {
        const int totalRolls = 25000;
        array<int>^ results = gcnew array<int>(6);

        // Roll the dice 25000 times and display
        // the results to the console.
        for (int x = 0; x < totalRolls; x++)
        {
            Byte roll = RollDice((Byte)results->Length);
            results[roll - 1]++;
        }
        for (int i = 0; i < results->Length; ++i)
        {
            Console::WriteLine("{0}: {1} ({2:p1})", i + 1, results[i], (double)results[i] / (double)totalRolls);
        }
    }

    // This method simulates a roll of the dice. The input parameter is the
    // number of sides of the dice.

    static Byte RollDice(Byte numberSides)
    {
        if (numberSides <= 0)
            throw gcnew ArgumentOutOfRangeException("numberSides");
        // Create a new instance of the RNGCryptoServiceProvider.
        RNGCryptoServiceProvider^ rngCsp = gcnew RNGCryptoServiceProvider();
        // Create a byte array to hold the random value.
        array<Byte>^ randomNumber = gcnew array<Byte>(1);
        do
        {
            // Fill the array with a random value.
            rngCsp->GetBytes(randomNumber);
        }
        while (!IsFairRoll(randomNumber[0], numberSides));
        // Return the random number mod the number
        // of sides.  The possible values are zero-
        // based, so we add one.
        return (Byte)((randomNumber[0] % numberSides) + 1);
    }

private:
    static bool IsFairRoll(Byte roll, Byte numSides)
    {
        // There are MaxValue / numSides full sets of numbers that can come up
        // in a single byte.  For instance, if we have a 6 sided die, there are
        // 42 full sets of 1-6 that come up.  The 43rd set is incomplete.
        int fullSetsOfValues = Byte::MaxValue / numSides;

        // If the roll is within this range of fair values, then we let it continue.
        // In the 6 sided die case, a roll between 0 and 251 is allowed.  (We use
        // < rather than <= since the = portion allows through an extra 0 value).
        // 252 through 255 would provide an extra 0, 1, 2, 3 so they are not fair
        // to use.
        return roll < numSides * fullSetsOfValues;
    }
};

int main()
{
    RNGCSP::Main();
}
//The following sample uses the Cryptography class to simulate the roll of a dice.

using System;
using System.IO;
using System.Text;
using System.Security.Cryptography;

class RNGCSP
{
    private static RNGCryptoServiceProvider rngCsp = new RNGCryptoServiceProvider();
    // Main method.
    public static void Main()
    {
        const int totalRolls = 25000;
        int[] results = new int[6];

        // Roll the dice 25000 times and display
        // the results to the console.
        for (int x = 0; x < totalRolls; x++)
        {
            byte roll = RollDice((byte)results.Length);
            results[roll - 1]++;
        }
        for (int i = 0; i < results.Length; ++i)
        {
            Console.WriteLine("{0}: {1} ({2:p1})", i + 1, results[i], (double)results[i] / (double)totalRolls);
        }
        rngCsp.Dispose();
        Console.ReadLine();
    }

    // This method simulates a roll of the dice. The input parameter is the
    // number of sides of the dice.

    public static byte RollDice(byte numberSides)
    {
        if (numberSides <= 0)
            throw new ArgumentOutOfRangeException("numberSides");

        // Create a byte array to hold the random value.
        byte[] randomNumber = new byte[1];
        do
        {
            // Fill the array with a random value.
            rngCsp.GetBytes(randomNumber);
        }
        while (!IsFairRoll(randomNumber[0], numberSides));
        // Return the random number mod the number
        // of sides.  The possible values are zero-
        // based, so we add one.
        return (byte)((randomNumber[0] % numberSides) + 1);
    }

    private static bool IsFairRoll(byte roll, byte numSides)
    {
        // There are MaxValue / numSides full sets of numbers that can come up
        // in a single byte.  For instance, if we have a 6 sided die, there are
        // 42 full sets of 1-6 that come up.  The 43rd set is incomplete.
        int fullSetsOfValues = Byte.MaxValue / numSides;

        // If the roll is within this range of fair values, then we let it continue.
        // In the 6 sided die case, a roll between 0 and 251 is allowed.  (We use
        // < rather than <= since the = portion allows through an extra 0 value).
        // 252 through 255 would provide an extra 0, 1, 2, 3 so they are not fair
        // to use.
        return roll < numSides * fullSetsOfValues;
    }
}
'The following sample uses the Cryptography class to simulate the roll of a dice.
Imports System.IO
Imports System.Text
Imports System.Security.Cryptography



Class RNGCSP
    Private Shared rngCsp As New RNGCryptoServiceProvider()
    ' Main method.
    Public Shared Sub Main()
        Const totalRolls As Integer = 25000
        Dim results(5) As Integer

        ' Roll the dice 25000 times and display
        ' the results to the console.
        Dim x As Integer
        For x = 0 To totalRolls
            Dim roll As Byte = RollDice(System.Convert.ToByte(results.Length))
            results((roll - 1)) += 1
        Next x
        Dim i As Integer

        While i < results.Length
            Console.WriteLine("{0}: {1} ({2:p1})", i + 1, results(i), System.Convert.ToDouble(results(i)) / System.Convert.ToDouble(totalRolls))
            i += 1
        End While
        rngCsp.Dispose()
        Console.ReadLine()
    End Sub


    ' This method simulates a roll of the dice. The input parameter is the
    ' number of sides of the dice.
    Public Shared Function RollDice(ByVal numberSides As Byte) As Byte
        If numberSides <= 0 Then
            Throw New ArgumentOutOfRangeException("NumSides")
        End If 
        ' Create a byte array to hold the random value.
        Dim randomNumber(0) As Byte
        Do
            ' Fill the array with a random value.
            rngCsp.GetBytes(randomNumber)
        Loop While Not IsFairRoll(randomNumber(0), numberSides)
        ' Return the random number mod the number
        ' of sides.  The possible values are zero-
        ' based, so we add one.
        Return System.Convert.ToByte(randomNumber(0) Mod numberSides + 1)

    End Function


    Private Shared Function IsFairRoll(ByVal roll As Byte, ByVal numSides As Byte) As Boolean
        ' There are MaxValue / numSides full sets of numbers that can come up
        ' in a single byte.  For instance, if we have a 6 sided die, there are
        ' 42 full sets of 1-6 that come up.  The 43rd set is incomplete.
        Dim fullSetsOfValues As Integer = [Byte].MaxValue / numSides

        ' If the roll is within this range of fair values, then we let it continue.
        ' In the 6 sided die case, a roll between 0 and 251 is allowed.  (We use
        ' < rather than <= since the = portion allows through an extra 0 value).
        ' 252 through 255 would provide an extra 0, 1, 2, 3 so they are not fair
        ' to use.
        Return roll < numSides * fullSetsOfValues

    End Function 'IsFairRoll
End Class

Remarques

Important

Ce type implémente l'interface IDisposable.This type implements the IDisposable interface. Une fois que vous avez fini d’utiliser le type, vous devez le supprimer directement ou indirectement.When you have finished using the type, you should dispose of it either directly or indirectly. Pour supprimer directement le type Dispose, appelez sa méthode dans un bloc try/catch.To dispose of the type directly, call its Dispose method in a try/catch block. Pour la supprimer indirectement, utilisez une construction de langage telle que using (dans C#) ou Using (dans Visual Basic).To dispose of it indirectly, use a language construct such as using (in C#) or Using (in Visual Basic). Pour plus d’informations, consultez la section « Utilisation d’un objet qui implémente IDisposable » dans la rubrique de l’interface IDisposable.For more information, see the "Using an Object that Implements IDisposable" section in the IDisposable interface topic.

Constructeurs

RNGCryptoServiceProvider() RNGCryptoServiceProvider() RNGCryptoServiceProvider() RNGCryptoServiceProvider()

Initialise une nouvelle instance de la classe RNGCryptoServiceProvider.Initializes a new instance of the RNGCryptoServiceProvider class.

RNGCryptoServiceProvider(Byte[]) RNGCryptoServiceProvider(Byte[]) RNGCryptoServiceProvider(Byte[]) RNGCryptoServiceProvider(Byte[])

Initialise une nouvelle instance de la classe RNGCryptoServiceProvider.Initializes a new instance of the RNGCryptoServiceProvider class.

RNGCryptoServiceProvider(CspParameters) RNGCryptoServiceProvider(CspParameters) RNGCryptoServiceProvider(CspParameters) RNGCryptoServiceProvider(CspParameters)

Initialise une nouvelle instance de la classe RNGCryptoServiceProvider avec les paramètres spécifiés.Initializes a new instance of the RNGCryptoServiceProvider class with the specified parameters.

RNGCryptoServiceProvider(String) RNGCryptoServiceProvider(String) RNGCryptoServiceProvider(String) RNGCryptoServiceProvider(String)

Initialise une nouvelle instance de la classe RNGCryptoServiceProvider.Initializes a new instance of the RNGCryptoServiceProvider class.

Méthodes

Dispose() Dispose() Dispose() Dispose()

En cas de substitution dans une classe dérivée, libère toutes les ressources utilisées par l’instance actuelle de la classe RandomNumberGenerator.When overridden in a derived class, releases all resources used by the current instance of the RandomNumberGenerator class.

(Inherited from RandomNumberGenerator)
Dispose(Boolean) Dispose(Boolean) Dispose(Boolean) Dispose(Boolean)

En cas de substitution dans une classe dérivée, libère les ressources non managées utilisées par RandomNumberGenerator et libère éventuellement les ressources managées.When overridden in a derived class, releases the unmanaged resources used by the RandomNumberGenerator and optionally releases the managed resources.

(Inherited from RandomNumberGenerator)
Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Détermine si l'objet spécifié est identique à l'objet actuel.Determines whether the specified object is equal to the current object.

(Inherited from Object)
Finalize() Finalize() Finalize() Finalize()

Libère les ressources utilisées par la classe RNGCryptoServiceProvider.Frees resources used by the RNGCryptoServiceProvider class.

GetBytes(Byte[]) GetBytes(Byte[]) GetBytes(Byte[]) GetBytes(Byte[])

Remplit un tableau d'octets avec une séquence de valeurs aléatoires forte du point de vue du chiffrement.Fills an array of bytes with a cryptographically strong sequence of random values.

GetBytes(Byte[], Int32, Int32) GetBytes(Byte[], Int32, Int32) GetBytes(Byte[], Int32, Int32) GetBytes(Byte[], Int32, Int32)

Remplit le tableau d’octets spécifié avec une séquence de valeurs aléatoires fortes du point de vue du chiffrement, en commençant à un index spécifié pour un nombre spécifié d’octets.Fills the specified byte array with a cryptographically strong random sequence of values starting at a specified index for a specified number of bytes.

GetBytes(Span<Byte>) GetBytes(Span<Byte>) GetBytes(Span<Byte>) GetBytes(Span<Byte>)

Remplit une étendue avec les octets aléatoires forts du point de vue du chiffrement.Fills a span with cryptographically strong random bytes.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Fait office de fonction de hachage par défaut.Serves as the default hash function.

(Inherited from Object)
GetNonZeroBytes(Byte[]) GetNonZeroBytes(Byte[]) GetNonZeroBytes(Byte[]) GetNonZeroBytes(Byte[])

Remplit un tableau d'octets avec une séquence de valeurs aléatoires différentes de zéro et forte du point de vue du chiffrement.Fills an array of bytes with a cryptographically strong sequence of random nonzero values.

GetNonZeroBytes(Span<Byte>) GetNonZeroBytes(Span<Byte>) GetNonZeroBytes(Span<Byte>) GetNonZeroBytes(Span<Byte>)

Remplit une étendue d’octets avec une séquence aléatoire forte du point de vue du chiffrement de valeurs différentes de zéro.Fills a byte span with a cryptographically strong random sequence of nonzero values.

GetType() GetType() GetType() GetType()

Obtient le Type de l'instance actuelle.Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Crée une copie superficielle de l'objet Object actuel.Creates a shallow copy of the current Object.

(Inherited from Object)
ToString() ToString() ToString() ToString()

Retourne une chaîne qui représente l'objet actuel.Returns a string that represents the current object.

(Inherited from Object)

S’applique à

Cohérence de thread

Ce type est thread-safe.This type is thread safe.

Voir aussi