Added auth/authenticate endpoint

Birdmap/Birdmap.csproj

@@ -10,6 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="3.1.9" />
     <PackageReference Include="Microsoft.AspNetCore.SpaServices.Extensions" Version="3.1.9" />
   </ItemGroup>
 

Birdmap/Controllers/AuthController.cs

@@ -0,0 +1,60 @@
+using Birdmap.Models;
+using Birdmap.Services.Interfaces;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Configuration;
+using Microsoft.IdentityModel.Tokens;
+using System;
+using System.IdentityModel.Tokens.Jwt;
+using System.Security.Claims;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Birdmap.Controllers
+{
+    [Authorize]
+    [ApiController]
+    [Route("api/[controller]")]
+    public class AuthController : ControllerBase
+    {
+        private readonly IAuthService _service;
+        private readonly IConfiguration _configuration;
+
+        public AuthController(IAuthService service, IConfiguration configuration)
+        {
+            _service = service;
+            _configuration = configuration;
+        }
+
+        [AllowAnonymous]
+        [HttpPost("authenticate")]
+        [ProducesResponseType(typeof(object), StatusCodes.Status200OK)]
+        public async Task<IActionResult> AuthenticateAsync([FromBody] AuthenticateRequest model)
+        {
+            var user = await _service.AuthenticateUserAsync(model.Username, model.Password);
+            var expires = DateTime.UtcNow.AddHours(2);
+            var tokenHandler = new JwtSecurityTokenHandler();
+            var key = Encoding.ASCII.GetBytes(_configuration["BasicAuth:Secret"]);
+            var tokenDescriptor = new SecurityTokenDescriptor
+            {
+                Subject = new ClaimsIdentity(new Claim[]
+                    {
+                        new Claim(ClaimTypes.Name, user.Name)
+                    }),
+                Expires = expires,
+                SigningCredentials = new SigningCredentials(new SymmetricSecurityKey(key), SecurityAlgorithms.HmacSha256Signature)
+            };
+            var token = tokenHandler.CreateToken(tokenDescriptor);
+            var tokenString = tokenHandler.WriteToken(token);
+
+            return Ok(
+                new
+                {
+                    Name = user.Name,
+                    Token = tokenString,
+                    Expires = expires,
+                });
+        }
+    }
+}

Birdmap/Controllers/WeatherForecastController.cs

@@ -2,11 +2,13 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
+using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.Logging;
 
 namespace Birdmap.Controllers
 {
+    [Authorize]
     [ApiController]
     [Route("[controller]")]
     public class WeatherForecastController : ControllerBase

Birdmap/Exceptions/AuthenticationException.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Birdmap.Exceptions
+{
+    public class AuthenticationException : Exception
+    {
+        public AuthenticationException()
+            : base("Username or password is incorrect.")
+        {
+        }
+    }
+}

Birdmap/Models/AuthenticateRequest.cs

@@ -0,0 +1,13 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Birdmap.Models
+{
+    public class AuthenticateRequest
+    {
+        [Required(AllowEmptyStrings = false, ErrorMessage = "Username is required.")]
+        public string Username { get; set; }
+
+        [Required(AllowEmptyStrings = false, ErrorMessage = "Password is required.")]
+        public string Password { get; set; }
+    }
+}

Birdmap/Models/User.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Birdmap.Models
+{
+    public class User
+    {
+        public string Name { get; set; }
+        public byte[] PasswordHash { get; set; }
+        public byte[] PasswordSalt { get; set; }
+    }
+}

Birdmap/Services/AuthService.cs

@@ -0,0 +1,78 @@
+using Birdmap.Models;
+using Birdmap.Services.Interfaces;
+using Microsoft.Extensions.Configuration;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Security.Authentication;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Birdmap.Services
+{
+    public class AuthService : IAuthService
+    {
+        private readonly IConfiguration _configuration;
+
+        public AuthService(IConfiguration configuration)
+        {
+            _configuration = configuration;
+        }
+
+        public async Task<User> AuthenticateUserAsync(string username, string password)
+        {
+            if (string.IsNullOrWhiteSpace(username) || string.IsNullOrEmpty(password))
+                throw new ArgumentException("Username or password cannot be null or empty.");
+
+            //var user = await _context.Users.SingleOrDefaultAsync(u => u.Name == username)
+            var user = await Temp_GetUserAsync(_configuration)
+                ?? throw new AuthenticationException();
+
+            if (!VerifyPasswordHash(password, user.PasswordHash, user.PasswordSalt))
+                throw new AuthenticationException();
+
+            return user;
+        }
+
+        private Task<User> Temp_GetUserAsync(IConfiguration configuration)
+        {
+            var name = configuration["BasicAuth:Username"];
+            var pass = configuration["BasicAuth:Password"];
+
+            CreatePasswordHash(pass, out var hash, out var salt);
+            return Task.FromResult(new User
+            {
+                Name = name,
+                PasswordHash = hash,
+                PasswordSalt = salt,
+            });
+        }
+
+        private static void CreatePasswordHash(string password, out byte[] passwordHash, out byte[] passwordSalt)
+        {
+            if (string.IsNullOrWhiteSpace(password)) throw new ArgumentException("Value cannot be null or empty.", "password");
+
+            using var hmac = new System.Security.Cryptography.HMACSHA512();
+
+            passwordSalt = hmac.Key;
+            passwordHash = hmac.ComputeHash(Encoding.UTF8.GetBytes(password));
+        }
+
+        private static bool VerifyPasswordHash(string password, byte[] storedHash, byte[] storedSalt)
+        {
+            if (string.IsNullOrWhiteSpace(password)) throw new ArgumentException("Value cannot be null or empty.", "password");
+            if (storedHash.Length != 64) throw new ArgumentException("Invalid length of password hash (64 bytes expected).", "passwordHash");
+            if (storedSalt.Length != 128) throw new ArgumentException("Invalid length of password salt (128 bytes expected).", "passwordHash");
+
+            using var hmac = new System.Security.Cryptography.HMACSHA512(storedSalt);
+
+            var computedHash = hmac.ComputeHash(Encoding.UTF8.GetBytes(password));
+            for (int i = 0; i < computedHash.Length; i++)
+            {
+                if (computedHash[i] != storedHash[i]) return false;
+            }
+
+            return true;
+        }
+    }
+}

Birdmap/Services/Interfaces/IAuthService.cs

@@ -0,0 +1,10 @@
+using Birdmap.Models;
+using System.Threading.Tasks;
+
+namespace Birdmap.Services.Interfaces
+{
+    public interface IAuthService
+    {
+        Task<User> AuthenticateUserAsync(string username, string password);
+    }
+}

Birdmap/Startup.cs

@@ -1,3 +1,6 @@
+using Birdmap.Services;
+using Birdmap.Services.Interfaces;
+using Microsoft.AspNetCore.Authentication.JwtBearer;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.HttpsPolicy;
@@ -6,6 +9,10 @@ using Microsoft.AspNetCore.SpaServices.ReactDevelopmentServer;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
+using Microsoft.IdentityModel.Tokens;
+using System;
+using System.Text;
+using System.Text.Json;
 
 namespace Birdmap
 {
@@ -21,7 +28,33 @@ namespace Birdmap
         // This method gets called by the runtime. Use this method to add services to the container.
         public void ConfigureServices(IServiceCollection services)
         {
-            services.AddControllersWithViews();
+            services.AddControllersWithViews()
+                .AddJsonOptions(opt =>
+                {
+                    //opt.JsonSerializerOptions.PropertyNamingPolicy = new JsonNamingPolicy()
+                });
+
+            services.AddTransient<IAuthService, AuthService>();
+
+            var key = Encoding.ASCII.GetBytes(Configuration["BasicAuth:Secret"]);
+            services.AddAuthentication(opt =>
+            {
+                opt.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
+                opt.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
+            })
+            .AddJwtBearer(opt =>
+            {
+                // opt.RequireHttpsMetadata = false;
+                opt.SaveToken = true;
+                opt.IncludeErrorDetails = true;
+                opt.TokenValidationParameters = new TokenValidationParameters
+                {
+                    ValidateIssuerSigningKey = true,
+                    IssuerSigningKey = new SymmetricSecurityKey(key),
+                    ValidateIssuer = false,
+                    ValidateAudience = false
+                };
+            });
 
             // In production, the React files will be served from this directory
             services.AddSpaStaticFiles(configuration =>
@@ -50,11 +83,12 @@ namespace Birdmap
 
             app.UseRouting();
 
+            app.UseAuthorization();
+            app.UseAuthentication();
+
             app.UseEndpoints(endpoints =>
             {
-                endpoints.MapControllerRoute(
+                endpoints.MapControllers();
-                    name: "default",
-                    pattern: "{controller}/{action=Index}/{id?}");
             });
 
             app.UseSpa(spa =>

Birdmap/appsettings.json

@@ -6,5 +6,10 @@
       "Microsoft.Hosting.Lifetime": "Information"
     }
   },
-  "AllowedHosts": "*"
+  "AllowedHosts": "*",
+  "BasicAuth": {
+    "Username": "user",
+    "Password": "pass",
+    "Secret": "7vj.3KW.hYE!}4u6"
+  }
 }