[2aea0fd] | 1 | // Licensed to the .NET Foundation under one or more agreements.
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| 2 | // The .NET Foundation licenses this file to you under the MIT license.
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| 3 | #nullable disable
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| 4 |
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| 5 | using System;
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| 6 | using System.ComponentModel.DataAnnotations;
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| 7 | using System.Security.Claims;
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| 8 | using System.Text;
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| 9 | using System.Text.Encodings.Web;
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| 10 | using System.Threading;
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| 11 | using System.Threading.Tasks;
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| 12 | using Microsoft.AspNetCore.Authorization;
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| 13 | using Microsoft.Extensions.Options;
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| 14 | using Microsoft.AspNetCore.Identity;
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| 15 | using Microsoft.AspNetCore.Identity.UI.Services;
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| 16 | using Microsoft.AspNetCore.Mvc;
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| 17 | using Microsoft.AspNetCore.Mvc.RazorPages;
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| 18 | using Microsoft.AspNetCore.WebUtilities;
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| 19 | using Microsoft.Extensions.Logging;
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| 20 |
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| 21 | namespace PostgreSqlDotnetCore.Areas.Identity.Pages.Account
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| 22 | {
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| 23 | [AllowAnonymous]
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| 24 | public class ExternalLoginModel : PageModel
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| 25 | {
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| 26 | private readonly SignInManager<IdentityUser> _signInManager;
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| 27 | private readonly UserManager<IdentityUser> _userManager;
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| 28 | private readonly IUserStore<IdentityUser> _userStore;
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| 29 | private readonly IUserEmailStore<IdentityUser> _emailStore;
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| 30 | private readonly IEmailSender _emailSender;
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| 31 | private readonly ILogger<ExternalLoginModel> _logger;
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| 32 |
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| 33 | public ExternalLoginModel(
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| 34 | SignInManager<IdentityUser> signInManager,
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| 35 | UserManager<IdentityUser> userManager,
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| 36 | IUserStore<IdentityUser> userStore,
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| 37 | ILogger<ExternalLoginModel> logger,
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| 38 | IEmailSender emailSender)
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| 39 | {
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| 40 | _signInManager = signInManager;
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| 41 | _userManager = userManager;
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| 42 | _userStore = userStore;
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| 43 | _emailStore = GetEmailStore();
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| 44 | _logger = logger;
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| 45 | _emailSender = emailSender;
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| 46 | }
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| 47 |
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| 48 | /// <summary>
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| 49 | /// This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
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| 50 | /// directly from your code. This API may change or be removed in future releases.
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| 51 | /// </summary>
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| 52 | [BindProperty]
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| 53 | public InputModel Input { get; set; }
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| 54 |
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| 55 | /// <summary>
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| 56 | /// This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
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| 57 | /// directly from your code. This API may change or be removed in future releases.
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| 58 | /// </summary>
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| 59 | public string ProviderDisplayName { get; set; }
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| 60 |
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| 61 | /// <summary>
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| 62 | /// This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
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| 63 | /// directly from your code. This API may change or be removed in future releases.
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| 64 | /// </summary>
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| 65 | public string ReturnUrl { get; set; }
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| 66 |
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| 67 | /// <summary>
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| 68 | /// This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
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| 69 | /// directly from your code. This API may change or be removed in future releases.
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| 70 | /// </summary>
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| 71 | [TempData]
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| 72 | public string ErrorMessage { get; set; }
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| 73 |
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| 74 | /// <summary>
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| 75 | /// This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
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| 76 | /// directly from your code. This API may change or be removed in future releases.
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| 77 | /// </summary>
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| 78 | public class InputModel
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| 79 | {
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| 80 | /// <summary>
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| 81 | /// This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
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| 82 | /// directly from your code. This API may change or be removed in future releases.
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| 83 | /// </summary>
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| 84 | [Required]
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| 85 | [EmailAddress]
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| 86 | public string Email { get; set; }
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| 87 | }
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| 88 |
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| 89 | public IActionResult OnGet() => RedirectToPage("./Login");
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| 90 |
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| 91 | public IActionResult OnPost(string provider, string returnUrl = null)
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| 92 | {
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| 93 | // Request a redirect to the external login provider.
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| 94 | var redirectUrl = Url.Page("./ExternalLogin", pageHandler: "Callback", values: new { returnUrl });
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| 95 | var properties = _signInManager.ConfigureExternalAuthenticationProperties(provider, redirectUrl);
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| 96 | return new ChallengeResult(provider, properties);
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| 97 | }
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| 98 |
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| 99 | public async Task<IActionResult> OnGetCallbackAsync(string returnUrl = null, string remoteError = null)
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| 100 | {
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| 101 | returnUrl = returnUrl ?? Url.Content("~/");
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| 102 | if (remoteError != null)
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| 103 | {
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| 104 | ErrorMessage = $"Error from external provider: {remoteError}";
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| 105 | return RedirectToPage("./Login", new { ReturnUrl = returnUrl });
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| 106 | }
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| 107 | var info = await _signInManager.GetExternalLoginInfoAsync();
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| 108 | if (info == null)
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| 109 | {
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| 110 | ErrorMessage = "Error loading external login information.";
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| 111 | return RedirectToPage("./Login", new { ReturnUrl = returnUrl });
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| 112 | }
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| 113 |
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| 114 | // Sign in the user with this external login provider if the user already has a login.
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| 115 | var result = await _signInManager.ExternalLoginSignInAsync(info.LoginProvider, info.ProviderKey, isPersistent: false, bypassTwoFactor: true);
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| 116 | if (result.Succeeded)
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| 117 | {
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| 118 | _logger.LogInformation("{Name} logged in with {LoginProvider} provider.", info.Principal.Identity.Name, info.LoginProvider);
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| 119 | return LocalRedirect(returnUrl);
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| 120 | }
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| 121 | if (result.IsLockedOut)
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| 122 | {
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| 123 | return RedirectToPage("./Lockout");
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| 124 | }
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| 125 | else
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| 126 | {
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| 127 | // If the user does not have an account, then ask the user to create an account.
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| 128 | ReturnUrl = returnUrl;
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| 129 | ProviderDisplayName = info.ProviderDisplayName;
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| 130 | if (info.Principal.HasClaim(c => c.Type == ClaimTypes.Email))
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| 131 | {
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| 132 | Input = new InputModel
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| 133 | {
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| 134 | Email = info.Principal.FindFirstValue(ClaimTypes.Email)
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| 135 | };
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| 136 | }
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| 137 | return Page();
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| 138 | }
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| 139 | }
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| 140 |
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| 141 | public async Task<IActionResult> OnPostConfirmationAsync(string returnUrl = null)
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| 142 | {
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| 143 | returnUrl = returnUrl ?? Url.Content("~/");
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| 144 | // Get the information about the user from the external login provider
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| 145 | var info = await _signInManager.GetExternalLoginInfoAsync();
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| 146 | if (info == null)
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| 147 | {
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| 148 | ErrorMessage = "Error loading external login information during confirmation.";
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| 149 | return RedirectToPage("./Login", new { ReturnUrl = returnUrl });
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| 150 | }
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| 151 |
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| 152 | if (ModelState.IsValid)
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| 153 | {
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| 154 | var user = CreateUser();
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| 155 |
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| 156 | await _userStore.SetUserNameAsync(user, Input.Email, CancellationToken.None);
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| 157 | await _emailStore.SetEmailAsync(user, Input.Email, CancellationToken.None);
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| 158 |
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| 159 | var result = await _userManager.CreateAsync(user);
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| 160 | if (result.Succeeded)
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| 161 | {
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| 162 | result = await _userManager.AddLoginAsync(user, info);
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| 163 | if (result.Succeeded)
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| 164 | {
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| 165 | _logger.LogInformation("User created an account using {Name} provider.", info.LoginProvider);
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| 166 |
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| 167 | var userId = await _userManager.GetUserIdAsync(user);
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| 168 | var code = await _userManager.GenerateEmailConfirmationTokenAsync(user);
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| 169 | code = WebEncoders.Base64UrlEncode(Encoding.UTF8.GetBytes(code));
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| 170 | var callbackUrl = Url.Page(
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| 171 | "/Account/ConfirmEmail",
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| 172 | pageHandler: null,
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| 173 | values: new { area = "Identity", userId = userId, code = code },
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| 174 | protocol: Request.Scheme);
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| 175 |
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| 176 | await _emailSender.SendEmailAsync(Input.Email, "Confirm your email",
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| 177 | $"Please confirm your account by <a href='{HtmlEncoder.Default.Encode(callbackUrl)}'>clicking here</a>.");
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| 178 |
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| 179 | // If account confirmation is required, we need to show the link if we don't have a real email sender
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| 180 | if (_userManager.Options.SignIn.RequireConfirmedAccount)
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| 181 | {
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| 182 | return RedirectToPage("./RegisterConfirmation", new { Email = Input.Email });
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| 183 | }
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| 184 |
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| 185 | await _signInManager.SignInAsync(user, isPersistent: false, info.LoginProvider);
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| 186 | return LocalRedirect(returnUrl);
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| 187 | }
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| 188 | }
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| 189 | foreach (var error in result.Errors)
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| 190 | {
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| 191 | ModelState.AddModelError(string.Empty, error.Description);
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| 192 | }
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| 193 | }
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| 194 |
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| 195 | ProviderDisplayName = info.ProviderDisplayName;
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| 196 | ReturnUrl = returnUrl;
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| 197 | return Page();
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| 198 | }
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| 199 |
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| 200 | private IdentityUser CreateUser()
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| 201 | {
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| 202 | try
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| 203 | {
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| 204 | return Activator.CreateInstance<IdentityUser>();
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| 205 | }
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| 206 | catch
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| 207 | {
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| 208 | throw new InvalidOperationException($"Can't create an instance of '{nameof(IdentityUser)}'. " +
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| 209 | $"Ensure that '{nameof(IdentityUser)}' is not an abstract class and has a parameterless constructor, or alternatively " +
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| 210 | $"override the external login page in /Areas/Identity/Pages/Account/ExternalLogin.cshtml");
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| 211 | }
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| 212 | }
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| 213 |
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| 214 | private IUserEmailStore<IdentityUser> GetEmailStore()
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| 215 | {
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| 216 | if (!_userManager.SupportsUserEmail)
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| 217 | {
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| 218 | throw new NotSupportedException("The default UI requires a user store with email support.");
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| 219 | }
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| 220 | return (IUserEmailStore<IdentityUser>)_userStore;
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| 221 | }
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| 222 | }
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| 223 | }
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