RNGCryptoServiceProvider 클래스

정의

CSP(암호화 서비스 공급자)가 제공한 구현을 사용하여 암호화 RNG(임의의 수 생성기)를 구현합니다.Implements a cryptographic Random Number Generator (RNG) using the implementation provided by the cryptographic service provider (CSP). 이 클래스는 상속될 수 없습니다.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
상속
RNGCryptoServiceProvider
특성

예제

다음 코드 예제에 사용 하 여 난수를 만드는 방법을 보여 줍니다는 RNGCryptoServiceProvider 클래스입니다.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

설명

중요

이 형식이 구현 하는 IDisposable 인터페이스입니다.This type implements the IDisposable interface. 형식을 사용 하 여 마쳤으면 직접 또는 간접적으로의 삭제 해야 있습니다.When you have finished using the type, you should dispose of it either directly or indirectly. 직접 형식의 dispose 호출 해당 Dispose 의 메서드를 try / catch 블록입니다.To dispose of the type directly, call its Dispose method in a try/catch block. 삭제 하지 직접, 언어 구문 같은 사용 using (C#에서) 또는 Using (Visual Basic에서는).To dispose of it indirectly, use a language construct such as using (in C#) or Using (in Visual Basic). 자세한 내용은 "를 사용 하는 개체는 구현 IDisposable" 섹션을 참조 하세요.를 IDisposable 인터페이스 항목입니다.For more information, see the "Using an Object that Implements IDisposable" section in the IDisposable interface topic.

생성자

RNGCryptoServiceProvider()

RNGCryptoServiceProvider 클래스의 새 인스턴스를 초기화합니다.Initializes a new instance of the RNGCryptoServiceProvider class.

RNGCryptoServiceProvider(Byte[])

RNGCryptoServiceProvider 클래스의 새 인스턴스를 초기화합니다.Initializes a new instance of the RNGCryptoServiceProvider class.

RNGCryptoServiceProvider(CspParameters)

지정된 매개 변수를 사용하여 RNGCryptoServiceProvider 클래스의 새 인스턴스를 초기화합니다.Initializes a new instance of the RNGCryptoServiceProvider class with the specified parameters.

RNGCryptoServiceProvider(String)

RNGCryptoServiceProvider 클래스의 새 인스턴스를 초기화합니다.Initializes a new instance of the RNGCryptoServiceProvider class.

메서드

Dispose()

파생 클래스에서 재정의되는 경우 RandomNumberGenerator 클래스의 현재 인스턴스에서 사용하는 리소스를 모두 해제합니다.When overridden in a derived class, releases all resources used by the current instance of the RandomNumberGenerator class.

(다음에서 상속됨 RandomNumberGenerator)
Dispose(Boolean)

파생 클래스에서 재정의된 경우 RandomNumberGenerator에서 사용하는 관리되지 않는 리소스를 해제하고 관리되는 리소스를 선택적으로 해제할 수 있습니다.When overridden in a derived class, releases the unmanaged resources used by the RandomNumberGenerator and optionally releases the managed resources.

(다음에서 상속됨 RandomNumberGenerator)
Equals(Object)

지정한 개체와 현재 개체가 같은지 여부를 확인합니다.Determines whether the specified object is equal to the current object.

(다음에서 상속됨 Object)
Finalize()

RNGCryptoServiceProvider 클래스에서 사용한 리소스를 해제합니다.Frees resources used by the RNGCryptoServiceProvider class.

GetBytes(Byte[])

임의의 암호화 수준 시퀀스 값으로 바이트 배열을 채웁니다.Fills an array of bytes with a cryptographically strong sequence of random values.

GetBytes(Byte[], Int32, Int32)

지정된 바이트에 대해 지정된 인덱스로 시작하는 임의의 암호화 수준 값 시퀀스로 지정된 바이트 배열을 채웁니다.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>)

임의의 암호화 수준 바이트로 범위를 채웁니다.Fills a span with cryptographically strong random bytes.

GetHashCode()

기본 해시 함수로 작동합니다.Serves as the default hash function.

(다음에서 상속됨 Object)
GetNonZeroBytes(Byte[])

0이 아닌 임의의 암호화 수준 시퀀스 값으로 바이트 배열을 채웁니다.Fills an array of bytes with a cryptographically strong sequence of random nonzero values.

GetNonZeroBytes(Span<Byte>)

0이 아닌 임의의 암호화 수준 값 시퀀스로 바이트 범위를 채웁니다.Fills a byte span with a cryptographically strong random sequence of nonzero values.

GetType()

현재 인스턴스의 Type을 가져옵니다.Gets the Type of the current instance.

(다음에서 상속됨 Object)
MemberwiseClone()

현재 Object의 단순 복사본을 만듭니다.Creates a shallow copy of the current Object.

(다음에서 상속됨 Object)
ToString()

현재 개체를 나타내는 문자열을 반환합니다.Returns a string that represents the current object.

(다음에서 상속됨 Object)

적용 대상

스레드 보안

이 형식은 스레드로부터 안전합니다.This type is thread safe.

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