.net安全字符串连接
.net安全字符串连接
提问于 2018-06-19 15:15:28
我需要在vb.net中合并字符串的帮助。可以将两个安全字符串连接在一起吗？
我有part1.securestring和part2.securesting，我希望我的输出是mainPassword = part1 +part2。
但它不起作用。你有什么办法解决这个问题吗？谢谢你的帮助。
回答 2
Stack Overflow用户
发布于 2018-06-19 15:49:27
如果您首先将SecureString转换为String，这将很容易做到，但这违背了SecureString的真正目的，即不将敏感信息作为挂起的字符串对象留在内存中。您必须小心，仅使用字节数组，并在之后将其清零。
<Extension()> _
Public Function Append(ByVal s1 As SecureString, ByVal s2 As SecureString) As SecureString
Dim b() As Byte
Dim p1 = Marshal.SecureStringToGlobalAllocUnicode(s1)
Try
Dim p2 = Marshal.SecureStringToGlobalAllocUnicode(s2)
Try
ReDim b(0 To s1.Length * 2 + s2.Length * 2 - 1)
Marshal.Copy(p1, b, 0, s1.Length * 2)
Marshal.Copy(p2, b, s1.Length * 2, s2.Length * 2)
Finally
Marshal.ZeroFreeGlobalAllocUnicode(p2)
End Try
Finally
Marshal.ZeroFreeGlobalAllocUnicode(p1)
End Try
Dim res = New SecureString()
For i As Integer = LBound(b) To UBound(b) Step 2
res.AppendChar(BitConverter.ToChar(b, i))
Next
res.MakeReadOnly()
Array.Clear(b, 0, b.Length)
Return res
End Function用法：
Dim result = SecureString1.Append(SecureString2)Stack Overflow用户
发布于 2018-06-19 15:43:16
结案。我找到了解决方案：
Dim stringPart1 As String
Dim stringPart2 As String
Dim stringPart3 As String
stringPart1 = New System.Net.NetworkCredential(String.Empty,part1).Password
stringPart2 = New System.Net.NetworkCredential(String.Empty,part2).Password
stringPart3 = New System.Net.NetworkCredential(String.Empty,part3).Password
hasloGlowne = New Security.SecureString()
For Each c As Char In stringpart1
hasloGlowne.AppendChar(c)
Next
For Each c As Char In stringpart2
hasloGlowne.AppendChar(c)
Next
For Each c As Char In stringpart3
hasloGlowne.AppendChar(c)
Next 页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/50922583
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