Net7 JWT Null Reference when publishing Blazor WASM Project? - azure

Question

so I've been working in the Net7 preview and have been trying to deploy a WASM project with identity and authentication which works fine locally. When I deploy the website 500s and digging into some of the logs, I get:
2022-11-07T13:42:28.854805951Z fail: Microsoft.AspNetCore.Authentication.JwtBearer.JwtBearerHandler[3]
2022-11-07T13:42:28.854856853Z Exception occurred while processing message.
2022-11-07T13:42:28.854865053Z System.NullReferenceException: Object reference not set to an instance of an object.
2022-11-07T13:42:28.856255318Z at Microsoft.AspNetCore.ApiAuthorization.IdentityServer.IdentityServerJwtBearerOptionsConfiguration.ResolveAuthorityAndKeysAsync(MessageReceivedContext messageReceivedContext)
2022-11-07T13:42:28.856286120Z at Microsoft.AspNetCore.Authentication.JwtBearer.JwtBearerHandler.HandleAuthenticateAsync()
In my Program.cs I have
builder.Services.AddDbContext<ApplicationDbContext>(options =>
options.UseSqlServer(connectionString));
builder.Services.AddDatabaseDeveloperPageExceptionFilter();
builder.Services.AddDefaultIdentity<ApplicationUser>(options => options.SignIn.RequireConfirmedAccount = true)
.AddEntityFrameworkStores<ApplicationDbContext>();
builder.Services.AddIdentityServer()
.AddApiAuthorization<ApplicationUser, ApplicationDbContext>();
builder.Services.AddAuthentication()
.AddIdentityServerJwt()
.AddJwtBearer()
.AddGoogle(googleOptions =>
{
googleOptions.ClientId = builder.Configuration["Authentication:Google:ClientId"];
googleOptions.ClientSecret = builder.Configuration["Authentication:Google:ClientSecret"];
});
builder.Services.AddControllersWithViews();
builder.Services.AddRazorPages();
builder.Services.AddHttpContextAccessor();
var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
app.UseMigrationsEndPoint();
app.UseWebAssemblyDebugging();
}
else
{
app.UseExceptionHandler("/Error");
// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}
app.UseHttpsRedirection();
app.UseBlazorFrameworkFiles();
app.UseStaticFiles();
app.UseRouting();
app.UseIdentityServer();
app.UseAuthentication();
app.UseAuthorization();
app.MapRazorPages();
app.MapControllers();
app.MapFallbackToFile("index.html");
app.Run();
I've been trying to follow different Duende guides but even when I eventually get it to run locally, I still get the same error. I've tried removing the JWT lines in AddAuthentication() and that also did not seem to help.

Answer 1

You need to have on your appsettings.json
"IdentityServer": {
"Key": {
"Type": "Development"
} },
Change the type to the correct one.