Question

在vb.net和2.0 Framework中开发了一个旧的Web应用程序。应用程序读取存储在Windows注册表中的sql server name的加密信息。说到这行代码

ConnectionStr = Encoding.ASCII.GetString(plainText)

我在字符串

中收到问号

“P 25 ARSMEYVDE02”

它应该是

“PLWARSMEYVDE02”

我尝试将编码更改为UTF8，默认或Unicode，但没有运气。这是函数

Public Function HostLogOnParameters() As Boolean
Try
    Dim rk As RegistryKey = Registry.LocalMachine.OpenSubKey(ConfigurationSettings.AppSettings("Registry.LocalMachine") & "Host", False)
    Dim ConnectionStr As String = rk.GetValue("1")
    Dim initVector As String = rk.GetValue("2")
    Dim strKey As String = rk.GetValue("3")
    Dim dec As New Decryptor
    dec.Decryptor(EncryptTransformer.EncryptionAlgorithm.TripleDes)
    dec.IV = Convert.FromBase64String(initVector)
    'Decrypt the string
    Dim plainText As Byte() = dec.Decrypt(Convert.FromBase64String(ConnectionStr), Convert.FromBase64String(strKey))
    ConnectionStr = Encoding.ASCII.GetString(plainText)
    ConnectionStr = ConnectionStr.Substring(1)
    mstrServer = Left(ConnectionStr, InStr(ConnectionStr, "'") - 1)
    ConnectionStr = ConnectionStr.Substring(mstrServer.Length + 3)
    mstrDatabase = Left(ConnectionStr, InStr(ConnectionStr, "'") - 1)
    ConnectionStr = ConnectionStr.Substring(mstrDatabase.Length + 3)
    mstrUser = Left(ConnectionStr, InStr(ConnectionStr, "'") - 1)
    ConnectionStr = ConnectionStr.Substring(mstrUser.Length + 3)
    mstrPassvord = Left(ConnectionStr, InStr(ConnectionStr, "'") - 1)
    Return True
Catch ex As Exception
    Return False
End Try
End Function

plainText的输出为十六进制。

2750CCD74152534D45595644455630325C44455656533032272C2745594372797374616C486F73744244272C274372797374616C486F737455736572272C273132337265706F7274696E6721402327

Answer 1

它可能是拉丁语（ISO 8859-1），因为它读取PÌ×ARSMEYVDEV02\DEVVS02，而Pixar当然是一个知名公司。请注意，Windows-1252是此字符编码的超集。

TripleDes加密/解密字符串有问号

1 个答案: