RNGCryptoServiceProvider RNGCryptoServiceProvider RNGCryptoServiceProvider RNGCryptoServiceProvider Class

Definition

Implementiert einen kryptografischen Zufallszahlen-Generator (Random Number Generator, RNG) unter Verwendung der Implementierung, die der Kryptografiedienstanbieter (Cryptographic Service Provider, CSP) bereitstellt. Implements a cryptographic Random Number Generator (RNG) using the implementation provided by the cryptographic service provider (CSP). Diese Klasse kann nicht vererbt werden. 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
Vererbung
RNGCryptoServiceProviderRNGCryptoServiceProviderRNGCryptoServiceProviderRNGCryptoServiceProvider
Attribute

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie erstellen Sie eine Zufallszahl mit der RNGCryptoServiceProvider Klasse.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
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

Hinweise

Wichtig

Dieser Typ implementiert die IDisposable Schnittstelle.This type implements the IDisposable interface. Wenn Sie mit dem Typ haben, sollten Sie es entweder direkt oder indirekt freigeben.When you have finished using the type, you should dispose of it either directly or indirectly. Damit des Typs direkt freigegeben werden, rufen Sie die Dispose -Methode in einer try / catch Block.To dispose of the type directly, call its Dispose method in a try/catch block. Um sie indirekt löschen, verwenden Sie ein Sprachkonstrukt wie using (in c#) oder Using (in Visual Basic).To dispose of it indirectly, use a language construct such as using (in C#) or Using (in Visual Basic). Weitere Informationen finden Sie im Abschnitt "mithilfe von ein-Objekt, das implementiert" IDisposable "" in der IDisposable schnittstellenthema.For more information, see the "Using an Object that Implements IDisposable" section in the IDisposable interface topic.

Konstruktoren

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

Initialisiert eine neue Instanz der RNGCryptoServiceProvider-Klasse. Initializes a new instance of the RNGCryptoServiceProvider class.

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

Initialisiert eine neue Instanz der RNGCryptoServiceProvider-Klasse. Initializes a new instance of the RNGCryptoServiceProvider class.

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

Initialisiert eine neue Instanz der RNGCryptoServiceProvider-Klasse mit den angegebenen Parametern. Initializes a new instance of the RNGCryptoServiceProvider class with the specified parameters.

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

Initialisiert eine neue Instanz der RNGCryptoServiceProvider-Klasse. Initializes a new instance of the RNGCryptoServiceProvider class.

Methoden

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

Gibt beim Überschreiben in einer abgeleiteten Klasse alle Ressourcen frei, die von der aktuellen Instanz der RandomNumberGenerator-Klasse verwendet werden. 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)

Gibt beim Überschreiben in einer abgeleiteten Klasse die von RandomNumberGenerator verwendeten nicht verwalteten Ressourcen und optional die verwalteten Ressourcen frei. 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)

Bestimmt, ob das angegebene Objekt mit dem aktuellen Objekt identisch ist. Determines whether the specified object is equal to the current object.

(Inherited from Object)
Finalize() Finalize() Finalize() Finalize()
GetBytes(Byte[]) GetBytes(Byte[]) GetBytes(Byte[]) GetBytes(Byte[])

Füllt ein Bytearray mit einer kryptografisch starken Folge von zufälligen Werten aus. 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)

Füllt das angegebene Bytearray mit einer kryptografisch starken Folge zufälliger Werte aus. Fills the specified byte array with a cryptographically strong random sequence of values.

(Inherited from RandomNumberGenerator)
GetBytes(Span<Byte>) GetBytes(Span<Byte>) GetBytes(Span<Byte>) GetBytes(Span<Byte>) Inherited from RandomNumberGenerator
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Fungiert als die Standardhashfunktion. Serves as the default hash function.

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

Füllt ein Bytearray mit einer kryptografisch starken Folge von zufälligen Werten aus, die ungleich 0 (null) sind. 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>) Inherited from RandomNumberGenerator
GetType() GetType() GetType() GetType()

Ruft den Type der aktuellen Instanz ab. Gets the Type of the current instance.

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

Erstellt eine flache Kopie des aktuellen Object. Creates a shallow copy of the current Object.

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

Gibt eine Zeichenfolge zurück, die das aktuelle Objekt darstellt. Returns a string that represents the current object.

(Inherited from Object)

Gilt für:

Threadsicherheit

Dieser Typ ist threadsicher. This type is thread safe.

Siehe auch