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VB.NET RC2CryptoServiceProvider类代码示例

本文整理汇总了VB.NET中System.Security.Cryptography.RC2CryptoServiceProvider的典型用法代码示例。如果您正苦于以下问题:VB.NET RC2CryptoServiceProvider类的具体用法?VB.NET RC2CryptoServiceProvider怎么用?VB.NET RC2CryptoServiceProvider使用的例子?那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。


在下文中一共展示了RC2CryptoServiceProvider类的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的VB.NET代码示例。

示例1: Crypto

' 导入命名空间
Imports System.IO
Imports System.Text
Imports System.Security.Cryptography



Module Crypto

    Sub Main()

        ' Create a new instance of the RC2CryptoServiceProvider class
        ' and automatically generate a Key and IV.
        Dim rc2CSP As New RC2CryptoServiceProvider()

        Console.WriteLine("Effective key size is {0} bits.", rc2CSP.EffectiveKeySize)

        ' Get the key and IV.
        Dim key As Byte() = rc2CSP.Key
        Dim IV As Byte() = rc2CSP.IV

        ' Get an encryptor.
        Dim encryptor As ICryptoTransform = rc2CSP.CreateEncryptor(key, IV)

        ' Encrypt the data as an array of encrypted bytes in memory.
        Dim msEncrypt As New MemoryStream()
        Dim csEncrypt As New CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)

        ' Convert the data to a byte array.
        Dim original As String = "Here is some data to encrypt."
        Dim toEncrypt As Byte() = Encoding.ASCII.GetBytes(original)

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

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

        '''''''''''''''''''''''''''''''''''''''''''''''''''''''
        ' This is where the data could be transmitted or saved.          
        '''''''''''''''''''''''''''''''''''''''''''''''''''''''

        'Get a decryptor that uses the same key and IV as the encryptor.
        Dim decryptor As ICryptoTransform = rc2CSP.CreateDecryptor(key, IV)

        ' Now decrypt the previously encrypted message using the decryptor
        ' obtained in the above step.
        Dim msDecrypt As New MemoryStream(encrypted)
        Dim csDecrypt As New CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read)

        ' Read the decrypted bytes from the decrypting stream
        ' and place them in a StringBuilder class.
        Dim roundtrip As New StringBuilder()

        Dim b As Integer = 0

        Do
            b = csDecrypt.ReadByte()

            If b <> -1 Then
                roundtrip.Append(ChrW(b))
            End If
        Loop While b <> -1

        ' Display the original data and the decrypted data.
        Console.WriteLine("Original:   {0}", original)
        Console.WriteLine("Round Trip: {0}", roundtrip)

        Console.ReadLine()

    End Sub
End Module
开发者ID:VB.NET开发者,项目名称:System.Security.Cryptography,代码行数:73,代码来源:RC2CryptoServiceProvider


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