84 lines
3.0 KiB
C#
84 lines
3.0 KiB
C#
using System.Security.Claims;
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using Microsoft.AspNetCore.Authentication;
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using Microsoft.AspNetCore.Authentication.Cookies;
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using Microsoft.AspNetCore.Identity;
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namespace Htmx.ApiDemo.Data;
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/// <summary>
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/// AOT-safe authentication service backed by MongoDB.
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/// No EF Core, no LINQ-to-SQL, no RelationalModel fully NativeAOT safe.
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/// IPasswordHasher is pure PBKDF2 crypto with no dynamic IL.
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/// </summary>
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public sealed class AuthService(
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MongoDbService mongo,
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IPasswordHasher<AppUser> passwordHasher,
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IHttpContextAccessor httpContextAccessor)
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{
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public async Task<(bool Success, string? Error)> RegisterAsync(
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string email, string password, string? displayName, CancellationToken ct = default)
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{
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var normalized = email.ToUpperInvariant();
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if (await mongo.EmailExistsAsync(normalized, ct))
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return (false, "That email address is already registered.");
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var user = new AppUser
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{
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Email = email,
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NormalizedEmail = normalized,
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DisplayName = string.IsNullOrWhiteSpace(displayName) ? null : displayName.Trim(),
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CreatedAtUtc = DateTime.UtcNow,
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};
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user.PasswordHash = passwordHasher.HashPassword(user, password);
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await mongo.InsertAsync(user, ct);
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await SignInUserAsync(user);
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return (true, null);
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}
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public async Task<(bool Success, string? Error)> LoginAsync(
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string email, string password, CancellationToken ct = default)
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{
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var normalized = email.ToUpperInvariant();
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var user = await mongo.FindByNormalizedEmailAsync(normalized, ct);
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if (user is null)
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return (false, "Invalid email or password.");
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var result = passwordHasher.VerifyHashedPassword(user, user.PasswordHash, password);
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if (result == PasswordVerificationResult.Failed)
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return (false, "Invalid email or password.");
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await SignInUserAsync(user);
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return (true, null);
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}
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public async Task SignOutAsync()
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{
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var ctx = httpContextAccessor.HttpContext
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?? throw new InvalidOperationException("HttpContext is not available.");
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await ctx.SignOutAsync(CookieAuthenticationDefaults.AuthenticationScheme);
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}
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private async Task SignInUserAsync(AppUser user)
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{
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var ctx = httpContextAccessor.HttpContext
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?? throw new InvalidOperationException("HttpContext is not available.");
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List<Claim> claims =
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[
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new Claim(ClaimTypes.NameIdentifier, user.Id.ToString()),
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new Claim(ClaimTypes.Name, user.Email),
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new Claim(ClaimTypes.Email, user.Email),
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];
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if (!string.IsNullOrEmpty(user.DisplayName))
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claims.Add(new Claim("DisplayName", user.DisplayName));
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var identity = new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme);
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var principal = new ClaimsPrincipal(identity);
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await ctx.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme, principal);
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}
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}
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