RC2CryptoServiceProvider.UseSalt 属性

定义

命名空间:

System.Security.Cryptography

程序集:

System.Security.Cryptography.dll

Source:

RC2CryptoServiceProvider.Unix.cs

获取或设置一个值，该值确定是否创建一个具有 11 字节长的零值 salt 的密钥。

public:
 property bool UseSalt { bool get(); void set(bool value); };

public bool UseSalt { get; [System.Runtime.Versioning.SupportedOSPlatform("windows")] set; }

[<set: System.Runtime.Versioning.SupportedOSPlatform("windows")>]
member this.UseSalt : bool with get, set

Public Property UseSalt As Boolean

属性值

Boolean

如果应该创建具有 11 字节长的零值 salt 的密钥，则为 true；否则为 false。 默认值为 false。

属性

SupportedOSPlatformAttribute

示例

下面的代码示例将 UseSalt 属性设置为 true，然后加密和解密值。

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

int main()
{
    array <Byte>^ originalBytes = 
        ASCIIEncoding::ASCII->GetBytes("Here is some data.");

    //Create a new RC2CryptoServiceProvider.
    RC2CryptoServiceProvider^ rc2Provider = 
        gcnew RC2CryptoServiceProvider();
    rc2Provider->UseSalt = true;

    rc2Provider->GenerateKey();
    rc2Provider->GenerateIV();

    //Encrypt the data.
    MemoryStream^ encryptionMemoryStream = gcnew MemoryStream();
    CryptoStream^ encryptionCryptoStream = gcnew CryptoStream(
        encryptionMemoryStream, rc2Provider->CreateEncryptor(
        rc2Provider->Key, rc2Provider->IV), CryptoStreamMode::Write);

    //Write all data to the crypto stream and flush it.
    encryptionCryptoStream->Write(originalBytes, 0, originalBytes->Length);
    encryptionCryptoStream->FlushFinalBlock();

    //Get encrypted array of bytes.
    array<Byte>^ encryptedBytes = encryptionMemoryStream->ToArray();

    //Decrypt the previously encrypted message.
    MemoryStream^ decryptionMemoryStream = 
        gcnew MemoryStream(encryptedBytes);
    CryptoStream^ decryptionCryptoStream = 
        gcnew CryptoStream(decryptionMemoryStream,
        rc2Provider->CreateDecryptor(rc2Provider->Key,rc2Provider->IV),
        CryptoStreamMode::Read);

    array<Byte>^ unencryptedBytes = 
        gcnew array<Byte>(originalBytes->Length); 

    //Read the data out of the crypto stream.
    decryptionCryptoStream->Read(unencryptedBytes, 0, 
        unencryptedBytes->Length);

    //Convert the byte array back into a string.
    String^ plainText = ASCIIEncoding::ASCII->GetString(unencryptedBytes);

    //Display the results.
    Console::WriteLine("Unencrypted text: {0}", plainText);

    Console::ReadLine();
}

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

namespace RC2CryptoServiceProvider_Examples
{
    class MyMainClass
    {
        public static void Main()
        {
            byte[] originalBytes = ASCIIEncoding.ASCII.GetBytes("Here is some data.");

        //Create a new RC2CryptoServiceProvider.
            RC2CryptoServiceProvider rc2CSP = new RC2CryptoServiceProvider();

            rc2CSP.UseSalt = true;

            rc2CSP.GenerateKey();
            rc2CSP.GenerateIV();

            //Encrypt the data.
            MemoryStream msEncrypt = new MemoryStream();
            CryptoStream csEncrypt = new CryptoStream(msEncrypt, rc2CSP.CreateEncryptor(rc2CSP.Key, rc2CSP.IV), CryptoStreamMode.Write);

            //Write all data to the crypto stream and flush it.
            csEncrypt.Write(originalBytes, 0, originalBytes.Length);
            csEncrypt.FlushFinalBlock();

            //Get encrypted array of bytes.
            byte[] encryptedBytes = msEncrypt.ToArray();

            //Decrypt the previously encrypted message.
            MemoryStream msDecrypt = new MemoryStream(encryptedBytes);
            CryptoStream csDecrypt = new CryptoStream(msDecrypt, rc2CSP.CreateDecryptor(rc2CSP.Key, rc2CSP.IV), CryptoStreamMode.Read);

            byte[] unencryptedBytes = new byte[originalBytes.Length];

            //Read the data out of the crypto stream.
            csDecrypt.Read(unencryptedBytes, 0, unencryptedBytes.Length);

            //Convert the byte array back into a string.
            string plaintext = ASCIIEncoding.ASCII.GetString(unencryptedBytes);

            //Display the results.
            Console.WriteLine("Unencrypted text: {0}", plaintext);

            Console.ReadLine();
        }
    }
}

Imports System.IO
Imports System.Text
Imports System.Security.Cryptography



Module MyMainModule

    Sub Main()
        Dim originalBytes As Byte() = ASCIIEncoding.ASCII.GetBytes("Here is some data.")

        'Create a new RC2CryptoServiceProvider.
        Dim rc2CSP As New RC2CryptoServiceProvider()

        rc2CSP.UseSalt = True

        rc2CSP.GenerateKey()
        rc2CSP.GenerateIV()

        'Encrypt the data.
        Dim msEncrypt As New MemoryStream()
        Dim csEncrypt As New CryptoStream(msEncrypt, rc2CSP.CreateEncryptor(rc2CSP.Key, rc2CSP.IV), CryptoStreamMode.Write)

        'Write all data to the crypto stream and flush it.
        csEncrypt.Write(originalBytes, 0, originalBytes.Length)
        csEncrypt.FlushFinalBlock()

        'Get encrypted array of bytes.
        Dim encryptedBytes As Byte() = msEncrypt.ToArray()

        'Decrypt the previously encrypted message.
        Dim msDecrypt As New MemoryStream(encryptedBytes)
        Dim csDecrypt As New CryptoStream(msDecrypt, rc2CSP.CreateDecryptor(rc2CSP.Key, rc2CSP.IV), CryptoStreamMode.Read)

        Dim unencryptedBytes(originalBytes.Length - 1) As Byte

        'Read the data out of the crypto stream.
        csDecrypt.Read(unencryptedBytes, 0, unencryptedBytes.Length)

        'Convert the byte array back into a string.
        Dim plaintext As String = ASCIIEncoding.ASCII.GetString(unencryptedBytes)

        'Display the results.
        Console.WriteLine("Unencrypted text: {0}", plaintext)

        Console.ReadLine()

    End Sub
End Module

注解

属性 UseSalt 允许与使用 11 字节长零值 salt 的现有应用程序进行互操作。 在大多数情况下，不应将盐与密钥一 RC2CryptoServiceProvider 起使用。

另请参阅

• 加密服务