ASP.NET Cookie是怎么生成的是怎么生成的(推荐推荐)
主要介绍了ASP.NET Cookie是怎么生成的,本文给大家介绍的非常详细,具有一定的参考借鉴价值,需要的朋友可以参考下
可能有人知道Cookie的生成由machineKey有关,machineKey用于决定Cookie生成的算法和密钥,并如果使用多台服务器做负载均衡时,必须指定一致的machineKey用于解密,那么这个过程到底是怎
样的呢?
如果需要在.NET Core中使用ASP.NET Cookie,本文将提到的内容也将是一些必经之路。
抽丝剥茧,一步一步分析
首先用户通过AccountController->Login进行登录:
//
// POST: /Account/Login
public async Task<ActionResult> Login(LoginViewModel model, string returnUrl)
{
if (!ModelState.IsValid)
{
return View(model);
}
var result = await SignInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, shouldLockout: false);
switch (result)
{
case SignInStatus.Success:
return RedirectToLocal(returnUrl);
// ......省略其它代码
}
}
它调用了SignInManager的PasswordSignInAsync方法,该方法代码如下(有删减):
public virtual async Task<SignInStatus> PasswordSignInAsync(string userName, string password, bool isPersistent, bool shouldLockout)
{
// ...省略其它代码
if (await UserManager.CheckPasswordAsync(user, password).WithCurrentCulture())
{
if (!await IsTwoFactorEnabled(user))
{
await UserManager.ResetAccessFailedCountAsync(user.Id).WithCurrentCulture();
}
return await SignInOrTwoFactor(user, isPersistent).WithCurrentCulture();
}
// ...省略其它代码
return SignInStatus.Failure;
}
想浏览原始代码,可参见官方的Github链接:
https://github.com/aspnet/AspNetIdentity/blob/master/src/Microsoft.AspNet.Identity.Owin/SignInManager.cs#L235-L276
可见它先需要验证密码,密码验证正确后,它调用了SignInOrTwoFactor方法,该方法代码如下:
private async Task<SignInStatus> SignInOrTwoFactor(TUser user, bool isPersistent)
{
var id = Convert.ToString(user.Id);
if (await IsTwoFactorEnabled(user) && !await AuthenticationManager.TwoFactorBrowserRememberedAsync(id).WithCurrentCulture())
{
var identity = new ClaimsIdentity(DefaultAuthenticationTypes.TwoFactorCookie);
identity.AddClaim(new Claim(ClaimTypes.NameIdentifier, id));
AuthenticationManager.SignIn(identity);
return SignInStatus.RequiresVerification;
}
await SignInAsync(user, isPersistent, false).WithCurrentCulture();
return SignInStatus.Success;
}
该代码只是判断了是否需要做双重验证,在需要双重验证的情况下,它调用了AuthenticationManager的SignIn方法;否则调用SignInAsync方法。SignInAsync的源代码如下:
public virtual async Task SignInAsync(TUser user, bool isPersistent, bool rememberBrowser)
{
var userIdentity = await CreateUserIdentityAsync(user).WithCurrentCulture();
// Clear any partial cookies from external or two factor partial sign ins
AuthenticationManager.SignOut(DefaultAuthenticationTypes.ExternalCookie, DefaultAuthenticationTypes.TwoFactorCookie);
if (rememberBrowser)
{
var rememberBrowserIdentity = AuthenticationManager.CreateTwoFactorRememberBrowserIdentity(ConvertIdToString(user.Id));
AuthenticationManager.SignIn(new AuthenticationProperties { IsPersistent = isPersistent }, userIdentity, rememberBrowserIdentity);
}
else
{
AuthenticationManager.SignIn(new AuthenticationProperties { IsPersistent = isPersistent }, userIdentity);
}
}
可见,最终所有的代码都是调用了AuthenticationManager.SignIn方法,所以该方法是创建Cookie的关键。
AuthenticationManager的实现定义在Microsoft.Owin中,因此无法在ASP.NET Identity中找到其源代码,因此我们打开Microsoft.Owin的源代码继续跟踪(有删减):
public void SignIn(AuthenticationProperties properties, params ClaimsIdentity[] identities)
{
AuthenticationResponseRevoke priorRevoke = AuthenticationResponseRevoke;
if (priorRevoke != null)
{
// ...省略不相关代码
AuthenticationResponseRevoke = new AuthenticationResponseRevoke(filteredSignOuts);
}
AuthenticationResponseGrant priorGrant = AuthenticationResponseGrant;
if (priorGrant == null)
{
AuthenticationResponseGrant = new AuthenticationResponseGrant(new ClaimsPrincipal(identities), properties);
}
else
{
// ...省略不相关代码
AuthenticationResponseGrant = new AuthenticationResponseGrant(new ClaimsPrincipal(mergedIdentities), priorGrant.Properties);
}
}
AuthenticationManager的Github链接如下:https://github.com/aspnet/AspNetKatana/blob/c33569969e79afd9fb4ec2d6bdff877e376821b2/src/Microsoft.Owin/Security/AuthenticationManager.cs
可见它用到了AuthenticationResponseGrant,继续跟踪可以看到它实际是一个属性:
public AuthenticationResponseGrant AuthenticationResponseGrant
{
// 省略get
set
{
if (value == null)
{
SignInEntry = null;
}
else
{