如何在.Net 3.5框架中實現安全協議TLS 1.2

Question

隨着Paypal更新他們的響應，我需要在.NET 3.5框架上的現有應用程序中將安全協議TLS更新到v1.2。 在現有代碼中更新此更改所需的更改，我無法將應用程序更新到更新的框架。

Answer 1

我正在使用VS 2008與.net 3.5.30729.4926。 我所要做的就是：

添加進口：

Imports System.Security.Authentication
Imports System.Net

將其添加到我的代碼（C＃）：

public const SslProtocols _Tls12 = (SslProtocols)0x00000C00;
public const SecurityProtocolType Tls12 = (SecurityProtocolType)_Tls12;
ServicePointManager.SecurityProtocol = Tls12;

VB.net版本：

Const _Tls12 As SslProtocols = DirectCast(&HC00, SslProtocols)
Const Tls12 As SecurityProtocolType = DirectCast(_Tls12, SecurityProtocolType)
ServicePointManager.SecurityProtocol = Tls12

Dim wbrq As HttpWebRequest
Dim wbrs As HttpWebResponse
Dim sw As StreamWriter
Dim sr As StreamReader
Dim strResult As String

'Create a new HttpWebRequest object.
wbrq = WebRequest.Create(strURL)
wbrq.Method = "POST"
wbrq.ContentLength = DataString.Length
wbrq.ContentType = "application/x-www-form-urlencoded"

'upload data
sw = New StreamWriter(wbrq.GetRequestStream)
sw.Write(DataString)
sw.Close()

'get response
wbrs = wbrq.GetResponse
sr = New StreamReader(wbrs.GetResponseStream)
strResult = sr.ReadToEnd.Trim
sr.Close()  

Answer 2

只需在vb .net 3.5版本中添加您的代碼：

ServicePointManager.SecurityProtocol = DirectCast(3072, SecurityProtocolType)

那么你的代碼變成：

ServicePointManager.SecurityProtocol = DirectCast(3072, SecurityProtocolType)

Dim wbrq As HttpWebRequest
Dim wbrs As HttpWebResponse
Dim sw As StreamWriter
Dim sr As StreamReader
Dim strResult As String

'Create a new HttpWebRequest object.
wbrq = WebRequest.Create(strURL)
wbrq.Method = "POST"
wbrq.ContentLength = DataString.Length
wbrq.ContentType = "application/x-www-form-urlencoded"
.............

希望這個幫助

Answer 3

如果您使用的是.NET 3.5.1，則可以選擇應用匯總修補程序並應用注冊表編輯以告知.NET使用系統默認值。 更多細節在這里

如果您未能使用.NET 4.5 for TLS 1.2和1.1支持，並且至少需要在Windows Server 2008 R2上使用。