.net - 通用字符串加密

Question

我正在寻找.NET中的常规字符串加密类。 (不要与“SecureString”类混淆。)

我已经开始提出自己的类，但是认为必须有一个.NET类，该类已经允许您使用任何加密服务提供程序加密/解密任何编码的字符串。

Public Class SecureString

        Private key() As Byte
        Private iv() As Byte
        Private m_SecureString As String

        Public ReadOnly Property Encrypted() As String
            Get
                Return m_SecureString
            End Get
        End Property

        Public ReadOnly Property Decrypted() As String
            Get
                Return Decrypt(m_SecureString)
            End Get
        End Property

        Public Sub New(ByVal StringToSecure As String)
            If StringToSecure Is Nothing Then StringToSecure = ""
            m_SecureString = Encrypt(StringToSecure)
        End Sub

        Private Function Encrypt(ByVal StringToEncrypt As String) As String

            Dim result As String = ""
            Dim bytes() As Byte = Text.Encoding.UTF8.GetBytes(StringToEncrypt)

            Using provider As New AesCryptoServiceProvider()

                With provider
                    .Mode = CipherMode.CBC                  
                    .GenerateKey()
                    .GenerateIV()
                    key = .Key
                    iv = .IV
                End With

                Using ms As New IO.MemoryStream
                    Using cs As New CryptoStream(ms, provider.CreateEncryptor(), CryptoStreamMode.Write)
                        cs.Write(bytes, 0, bytes.Length)
                        cs.FlushFinalBlock()
                    End Using
                    result = Convert.ToBase64String(ms.ToArray())
                End Using

            End Using

            Return result

        End Function

        Private Function Decrypt(ByVal StringToDecrypt As String) As String

            Dim result As String = ""
            Dim bytes() As Byte = Convert.FromBase64String(StringToDecrypt)

            Using provider As New AesCryptoServiceProvider()

                Using ms As New IO.MemoryStream
                    Using cs As New CryptoStream(ms, provider.CreateDecryptor(key, iv), CryptoStreamMode.Write)
                        cs.Write(bytes, 0, bytes.Length)
                        cs.FlushFinalBlock()
                    End Using
                    result = Text.Encoding.UTF8.GetString(ms.ToArray())
                End Using

            End Using

            Return result

        End Function

    End Class

Answer 1

通常，用于对称加密的AES算法是对字符串进行通用加密的方法。但是，恐怕.NET BCL提供基本的加密/解密类和功能不会进一步简化您的工作。

您可以找到一个很好的示例，说明如何使用this page上的加密类专门用于字符串加密。它似乎非常完整且确实受到好评-您甚至可能会发现无需任何进一步修改就可以使用它。注意:Rijndael与AES是相同的算法。 (从技术上讲，前者是指算法的真实名称，而后者是指高级加密标准。)