我试图使一个自定义授权属性在ASP。净的核心。在以前的版本中,可以重写bool AuthorizeCore(HttpContextBase httpContext)。但是这在AuthorizeAttribute中不再存在。
当前制作自定义AuthorizeAttribute的方法是什么?
我想要完成的:我正在头授权中接收会话ID。通过该ID,我将知道特定操作是否有效。
我试图使一个自定义授权属性在ASP。净的核心。在以前的版本中,可以重写bool AuthorizeCore(HttpContextBase httpContext)。但是这在AuthorizeAttribute中不再存在。
当前制作自定义AuthorizeAttribute的方法是什么?
我想要完成的:我正在头授权中接收会话ID。通过该ID,我将知道特定操作是否有效。
当前回答
我有不记名令牌,我可以阅读索赔。 我在控制器和动作上使用该属性
public class CustomAuthorizationAttribute : ActionFilterAttribute
{
public string[] Claims;
public override void OnActionExecuting(ActionExecutingContext context)
{
// check user
var contextUser = context?.HttpContext?.User;
if (contextUser == null)
{
throw new BusinessException("Forbidden");
}
// check roles
var roles = contextUser.FindAll("http://schemas.microsoft.com/ws/2008/06/identity/claims/role").Select(c => c.Value).ToList();
if (!roles.Any(s => Claims.Contains(s)))
{
throw new BusinessException("Forbidden");
}
base.OnActionExecuting(context);
}
}
例子
[CustomAuthorization(Claims = new string[]
{
nameof(AuthorizationRole.HR_ADMIN),
nameof(AuthorizationRole.HR_SETTING)
})]
[Route("api/[controller]")]
[ApiController]
public class SomeAdminController : ControllerBase
{
private readonly IMediator _mediator;
public SomeAdminController(IMediator mediator)
{
_mediator = mediator;
}
[HttpGet("list/SomeList")]
public async Task<IActionResult> SomeList()
=> Ok(await _mediator.Send(new SomeListQuery()));
}
这就是角色
public struct AuthorizationRole
{
public static string HR_ADMIN;
public static string HR_SETTING;
}
其他回答
基于Derek Greer伟大的答案,我用枚举来做。
下面是我的代码示例:
public enum PermissionItem
{
User,
Product,
Contact,
Review,
Client
}
public enum PermissionAction
{
Read,
Create,
}
public class AuthorizeAttribute : TypeFilterAttribute
{
public AuthorizeAttribute(PermissionItem item, PermissionAction action)
: base(typeof(AuthorizeActionFilter))
{
Arguments = new object[] { item, action };
}
}
public class AuthorizeActionFilter : IAuthorizationFilter
{
private readonly PermissionItem _item;
private readonly PermissionAction _action;
public AuthorizeActionFilter(PermissionItem item, PermissionAction action)
{
_item = item;
_action = action;
}
public void OnAuthorization(AuthorizationFilterContext context)
{
bool isAuthorized = MumboJumboFunction(context.HttpContext.User, _item, _action); // :)
if (!isAuthorized)
{
context.Result = new ForbidResult();
}
}
}
public class UserController : BaseController
{
private readonly DbContext _context;
public UserController( DbContext context) :
base()
{
_logger = logger;
}
[Authorize(PermissionItem.User, PermissionAction.Read)]
public async Task<IActionResult> Index()
{
return View(await _context.User.ToListAsync());
}
}
什么? !
我决定再补充一个简单的答案。B/c我发现大多数答案都有点过度设计。也因为我需要一种授予授权的方法,而不仅仅是否认它。这里的大多数答案都提供了一种“加强”安全性的方法,但我想“放松”它。例如:“如果配置了某些应用程序设置,则允许匿名用户访问”。
public class MyAuthAttribute : Attribute, IAuthorizationFilter
{
public void OnAuthorization(AuthorizationFilterContext context)
{
//check access
if (CheckPermissions())
{
//all good, add optional code if you want. Or don't
}
else
{
//DENIED!
//return "ChallengeResult" to redirect to login page (for example)
context.Result = new ChallengeResult(CookieAuthenticationDefaults.AuthenticationScheme);
}
}
}
就是这样。不需要混淆“策略”,“声明”,“处理程序”和其他[哔]
用法:
// GET api/Get/5
[MyAuth]
public ActionResult<string> Get(int id)
{
return "blahblah";
}
这里很多人已经说过了,但是有了策略处理程序,你就可以在。net框架中使用旧方法实现的功能而言,你可以走得更远。
我在SO网站上快速写了一个答案:https://stackoverflow.com/a/61963465/7081176 对我来说,在制作了一些类后,它完美地工作了:
EditUserRequirement:
public class EditUserRequirement : IAuthorizationRequirement
{
public EditUserRequirement()
{
}
}
一个抽象处理程序,使我的生活更容易:
public abstract class AbstractRequirementHandler<T> : IAuthorizationHandler
where T : IAuthorizationRequirement
{
public async Task HandleAsync(AuthorizationHandlerContext context)
{
var pendingRequirements = context.PendingRequirements.ToList();
foreach (var requirement in pendingRequirements)
{
if (requirement is T typedRequirement)
{
await HandleRequirementAsync(context, typedRequirement);
}
}
}
protected abstract Task HandleRequirementAsync(AuthorizationHandlerContext context, T requirement);
}
抽象处理程序的实现:
public class EditUserRequirementHandler : AbstractRequirementHandler<EditUserRequirement>
{
protected override Task HandleRequirementAsync(AuthorizationHandlerContext context, EditUserRequirement requirement)
{
// If the user is owner of the resource, allow it.
if (IsOwner(context.User, g))
{
context.Succeed(requirement);
}
return Task.CompletedTask;
}
private static bool IsOwner(ClaimsPrincipal user, Guid userIdentifier)
{
return user.GetUserIdentifier() == userIdentifier;
}
}
注册我的处理程序和需求: 服务。AddSingleton < IAuthorizationHandler, EditUserRequirementHandler > ();
services.AddAuthorization(options =>
{
options.AddPolicy(Policies.Policies.EditUser, policy =>
{
policy.Requirements.Add(new EditUserRequirement());
});
});
然后使用我在Blazor的策略:
<AuthorizeView Policy="@Policies.EditUser" Resource="@id">
<NotAuthorized>
<Unauthorized />
</NotAuthorized>
<Authorized Context="Auth">
...
</Authorized>
</AuthorizeView>
我希望这对面临这个问题的人有用。
当前制作自定义AuthorizeAttribute的方法是什么
对于纯授权场景(例如仅限制特定用户访问),建议使用新的授权块:https://github.com/aspnet/MusicStore/blob/1c0aeb08bb1ebd846726232226279bbe001782e1/samples/MusicStore/Startup.cs#L84-L92
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.Configure<AuthorizationOptions>(options =>
{
options.AddPolicy("ManageStore", policy => policy.RequireClaim("Action", "ManageStore"));
});
}
}
public class StoreController : Controller
{
[Authorize(Policy = "ManageStore"), HttpGet]
public async Task<IActionResult> Manage() { ... }
}
对于身份验证,最好在中间件级别进行处理。
你到底想达到什么目的?
如果有人只是想在授权阶段使用当前的安全实践验证一个承载令牌,
将此添加到Startup/ConfigureServices中
services.AddSingleton<IAuthorizationHandler, BearerAuthorizationHandler>();
services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme).AddJwtBearer();
services.AddAuthorization(options => options.AddPolicy("Bearer",
policy => policy.AddRequirements(new BearerRequirement())
)
);
在你的代码库中,
public class BearerRequirement : IAuthorizationRequirement
{
public async Task<bool> IsTokenValid(SomeValidationContext context, string token)
{
// here you can check if the token received is valid
return true;
}
}
public class BearerAuthorizationHandler : AuthorizationHandler<BearerRequirement>
{
public BearerAuthorizationHandler(SomeValidationContext thatYouCanInject)
{
...
}
protected override async Task HandleRequirementAsync(AuthorizationHandlerContext context, BearerRequirement requirement)
{
var authFilterCtx = (Microsoft.AspNetCore.Mvc.Filters.AuthorizationFilterContext)context.Resource;
string authHeader = authFilterCtx.HttpContext.Request.Headers["Authorization"];
if (authHeader != null && authHeader.Contains("Bearer"))
{
var token = authHeader.Replace("Bearer ", string.Empty);
if (await requirement.IsTokenValid(thatYouCanInject, token))
{
context.Succeed(requirement);
}
}
}
}
如果代码没有到达context.Succeed(…),那么无论如何都会失败(401)。
然后在你的控制器中你可以使用
[Authorize(Policy = "Bearer", AuthenticationSchemes = JwtBearerDefaults.AuthenticationScheme)]