asp.net - 有条件地根据浏览器设置 ASP.NET 会话和身份验证 cookiesamesite 值
问题描述
我已经对我的 web.config 进行了以下更改,并且我能够使用 samesite=none 和安全地同时提供身份验证和会话 cookie。
问题在于浏览器(例如 chrome 51-66)发送 samesite=none 会使 cookie 无效,然后用户没有会话并且无法登录。 https://www.chromium.org/updates/same-site/incompatible-clients
有没有办法扩展创建这些 cookie 的类或其他方式来根据浏览器/用户代理有条件地设置 samesite 参数
<system.web>
<httpCookies sameSite="None"/>
<sessionState cookieSameSite="None" />
<authentication mode="Forms">
<forms cookieSameSite="None" />
</authentication>
解决方案
虽然不是一个完整的解决方案(因为它仅涵盖会话 cookie,因为在我的用例中我手动设置了表单身份验证 cookie),但我在 MVC5 应用程序中实现了以下内容来处理SameSite
属性的设置:
在Global.asax.cs
protected void Session_Start(object sender, EventArgs e)
{
var cookie = Response.Cookies["ASP.NET_SessionId"];
if (cookie != null)
cookie.SameSite = SameSiteCookieUtils.GetSameSiteMode(Request.UserAgent, SameSiteMode.None);
}
// Ref https://docs.microsoft.com/en-us/aspnet/core/security/samesite?view=aspnetcore-3.1#supporting-older-browsers
public static class SameSiteCookieUtils
{
/// <summary>
/// -1 defines the unspecified value, which tells ASPNET to not send the SameSite attribute
/// </summary>
public const SameSiteMode Unspecified = (SameSiteMode) (-1);
public static SameSiteMode GetSameSiteMode(string userAgent, SameSiteMode mode)
{
if (string.IsNullOrWhiteSpace(userAgent))
return mode;
if (mode == SameSiteMode.None && DisallowsSameSiteNone(userAgent))
return Unspecified;
return mode;
}
public static bool DisallowsSameSiteNone(string userAgent)
{
// Cover all iOS based browsers here. This includes:
// - Safari on iOS 12 for iPhone, iPod Touch, iPad
// - WkWebview on iOS 12 for iPhone, iPod Touch, iPad
// - Chrome on iOS 12 for iPhone, iPod Touch, iPad
// All of which are broken by SameSite=None, because they use the iOS networking
// stack.
if (userAgent.Contains("CPU iPhone OS 12") ||
userAgent.Contains("iPad; CPU OS 12"))
{
return true;
}
// Cover Mac OS X based browsers that use the Mac OS networking stack.
// This includes:
// - Safari on Mac OS X.
// This does not include:
// - Chrome on Mac OS X
// Because they do not use the Mac OS networking stack.
if (userAgent.Contains("Macintosh; Intel Mac OS X 10_14") &&
userAgent.Contains("Version/") && userAgent.Contains("Safari"))
{
return true;
}
// Cover Chrome 50-69, because some versions are broken by SameSite=None,
// and none in this range require it.
// Note: this covers some pre-Chromium Edge versions,
// but pre-Chromium Edge does not require SameSite=None.
if (userAgent.Contains("Chrome/5") || userAgent.Contains("Chrome/6"))
{
return true;
}
return false;
}
}
使用DisallowsSameSiteNone
来自 Microsoft Docs 的逻辑https://docs.microsoft.com/en-us/aspnet/core/security/samesite?view=aspnetcore-3.1#supporting-older-browsers
我还在我的web.config
<httpCookies httpOnlyCookies="true" requireSSL="true" />
希望其中一些对您有用
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