public static async Task RenderHomePageAsync(HttpContext context)
{
if (context?.User?.Identity?.IsAuthenticated == true)
{
var requirement = new RolesAuthorizationRequirement(new string[] { "ADMIN" });
var authorizationService = context.RequestServices.GetRequiredService <IAuthorizationService>();
var result = await authorizationService.AuthorizeAsync(context.User, null, new IAuthorizationRequirement[] { requirement });
if (result.Succeeded)
{
await context.Response.WriteAsync(
@"<html>
<head><title>Index</title></head>
<body>" +
$"<h3>{context.User.Identity.Name}, you are authorized.</h3>" +
@"<a href='Account/Logout'>Sign Out</a>
</body>
</html>");
}
else
{
await context.ForbidAsync();
}
}
else
{
await context.ChallengeAsync();
}
}
public static void Main()
{
Host.CreateDefaultBuilder()
.ConfigureWebHostDefaults(builder => builder
.ConfigureServices(svcs => svcs
.AddDbContext <UserDbContext>(options => options.UseSqlServer("Server=(localdb)\\mssqllocaldb;Database=AuthorizationDemo;Trusted_Connection=True;MultipleActiveResultSets=true"))
.AddRouting()
.AddAuthorization(options => {
var requirement = new RolesAuthorizationRequirement(new string[] { "ADMIN" });
var policy = new AuthorizationPolicy(new IAuthorizationRequirement[] { requirement }, new string[0]);
options.AddPolicy("HomePage", policy);
})
.AddAuthentication(options => options.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme).AddCookie())
.Configure(app => app
.UseAuthentication()
.UseRouting()
.UseEndpoints(endpoints =>
{
endpoints.Map("", RenderHomePageAsync);
endpoints.Map("Account/Login", SignInAsync);
endpoints.Map("Account/Logout", SignOutAsync);
endpoints.Map("Account/AccessDenied", DenyAccessAysnc);
})))
.Build()
.Run();
}
public void PoliciesShouldCombine()
{
const string allowedRole = "test role";
var roleRequirement = new RolesAuthorizationRequirement(new[] { allowedRole });
var rolePolicy = new AuthorizationPolicy(new[] { roleRequirement }, new string[0]);
var denyAnonymousRequirement = new DenyAnonymousAuthorizationRequirement();
var denyAnonymousPolicy = new AuthorizationPolicy(new[] { denyAnonymousRequirement }, new string[0]);
var combinedPolicy = AuthorizationPolicy.Combine(rolePolicy, denyAnonymousPolicy);
var requirements = new HashSet <IAuthorizationRequirement>(combinedPolicy.Requirements);
Assert.IsTrue(requirements.Contains(roleRequirement));
Assert.IsTrue(requirements.Contains(denyAnonymousRequirement));
}
public async Task OnlyHandlesAuthZyinRequirement()
{
var testRole = "TestRole";
var testRoleRequirement = new RolesAuthorizationRequirement(new[] { testRole });
var identity = new ClaimsIdentity();
identity.AddClaim(new Claim(identity.RoleClaimType, testRole));
var principal = new ClaimsPrincipal(identity);
var authorizationContext = new AuthorizationHandlerContext(new [] { testRoleRequirement }, principal, null);
var handler = new AuthZyinHandler(this.context, this.logger);
await handler.HandleAsync(authorizationContext);
Assert.Single(authorizationContext.Requirements);
Assert.Single(authorizationContext.PendingRequirements);
}
public static async Task <AuthorizationResult> Authorize <TRequest>(
this IAuthorizationService authService,
ClaimsPrincipal claimsPrincipal, TRequest request, object resource)
{
var attributes = request.GetType().GetCustomAttributes(typeof(AuthorizeAttribute), true)
.Cast <AuthorizeAttribute>()
.ToList();
var policies = attributes.Where(x => x.Policy != null).Select(x => x.Policy).ToList();
var roles = attributes
.Where(x => x.Roles != null)
.SelectMany(x => x.Roles.Split(','))
.Select(x => x.Trim())
.ToList();
// no authorization needed, proceed
if (policies.Any() == false && roles.Any() == false)
{
return(AuthorizationResult.Success());
}
foreach (var policy in policies)
{
var result = await authService.AuthorizeAsync(claimsPrincipal, resource, policy);
if (result.Succeeded == false)
{
return(result);
}
}
if (roles.Any())
{
var requirement = new RolesAuthorizationRequirement(roles);
var result = await authService.AuthorizeAsync(claimsPrincipal, request, requirement);
if (result.Succeeded == false)
{
return(result);
}
}
return(AuthorizationResult.Success());
}
public AreaRolesAuthorizationRequirement(string area, IEnumerable <string> allowedRoles)
{
Area = area;
AllowedRoles = allowedRoles;
RolesAuthorizationRequirement = new RolesAuthorizationRequirement(allowedRoles);
}
private static bool VerifyRolePermission(AuthorizationHandlerContext context, RolesAuthorizationRequirement requirement)
{
var roleClaims = context.User.FindAll(JwtConstants.Strings.JwtClaimIdentifiers.Rol);// FindFirst(c => c.Type == ClaimTypes.DateOfBirth && c.Issuer == "http://contoso.com").Value);
var matchClaimCount = roleClaims.Count(roleClaim => requirement.AllowedRoles.Contains(roleClaim.Value));
return(matchClaimCount > 0);
}
