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635 | daniel-mar | 1 | <?php |
2 | |||
3 | /* |
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4 | * OIDplus 2.0 |
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1149 | daniel-mar | 5 | * Copyright 2019 - 2023 Daniel Marschall, ViaThinkSoft |
635 | daniel-mar | 6 | * |
7 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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8 | * you may not use this file except in compliance with the License. |
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9 | * You may obtain a copy of the License at |
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10 | * |
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11 | * http://www.apache.org/licenses/LICENSE-2.0 |
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12 | * |
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13 | * Unless required by applicable law or agreed to in writing, software |
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14 | * distributed under the License is distributed on an "AS IS" BASIS, |
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15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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16 | * See the License for the specific language governing permissions and |
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17 | * limitations under the License. |
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18 | */ |
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19 | |||
1050 | daniel-mar | 20 | use ViaThinkSoft\OIDplus\OIDplus; |
21 | use ViaThinkSoft\OIDplus\OIDplusGui; |
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22 | use ViaThinkSoft\OIDplus\OIDplusException; |
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23 | use ViaThinkSoft\OIDplus\OIDplusRA; |
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24 | |||
635 | daniel-mar | 25 | # More information about the OAuth2 implementation: |
26 | # - https://developers.facebook.com/docs/facebook-login/manually-build-a-login-flow |
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27 | # - https://developers.facebook.com/tools/explorer/ |
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28 | |||
29 | require_once __DIR__ . '/../../../../includes/oidplus.inc.php'; |
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30 | |||
1050 | daniel-mar | 31 | set_exception_handler(array(OIDplusGui::class, 'html_exception_handler')); |
635 | daniel-mar | 32 | |
1200 | daniel-mar | 33 | OIDplus::init(true); |
34 | |||
1050 | daniel-mar | 35 | if (OIDplus::baseConfig()->getValue('DISABLE_PLUGIN_ViaThinkSoft\OIDplus\OIDplusPagePublicLoginFacebook', false)) { |
635 | daniel-mar | 36 | throw new OIDplusException(_L('This plugin was disabled by the system administrator!')); |
37 | } |
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38 | |||
39 | if (!OIDplus::baseConfig()->getValue('FACEBOOK_OAUTH2_ENABLED', false)) { |
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40 | throw new OIDplusException(_L('Facebook OAuth authentication is disabled on this system.')); |
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41 | } |
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42 | |||
43 | _CheckParamExists($_GET, 'code'); |
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44 | _CheckParamExists($_GET, 'state'); |
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45 | _CheckParamExists($_COOKIE, 'csrf_token_weak'); |
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46 | |||
47 | if ($_GET['state'] != $_COOKIE['csrf_token_weak']) { |
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866 | daniel-mar | 48 | die(_L('Missing or wrong CSRF Token')); |
635 | daniel-mar | 49 | } |
50 | |||
51 | // Get access token |
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52 | |||
1149 | daniel-mar | 53 | $cont = url_post_contents( |
54 | "https://graph.facebook.com/v8.0/oauth/access_token?". |
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55 | "client_id=".urlencode(OIDplus::baseConfig()->getValue('FACEBOOK_OAUTH2_CLIENT_ID'))."&". |
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56 | "redirect_uri=".urlencode(OIDplus::webpath(__DIR__,OIDplus::PATH_ABSOLUTE_CANONICAL).'oauth.php')."&". |
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57 | "client_secret=".urlencode(OIDplus::baseConfig()->getValue('FACEBOOK_OAUTH2_CLIENT_SECRET'))."&". |
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58 | "code=".$_GET['code'] |
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635 | daniel-mar | 59 | ); |
1149 | daniel-mar | 60 | |
61 | if ($cont === false) { |
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62 | throw new OIDplusException(_L('Communication with %1 server failed', 'Facebook')); |
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63 | } |
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64 | |||
635 | daniel-mar | 65 | $data = json_decode($cont,true); |
66 | if (isset($data['error'])) { |
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67 | echo '<h2>Error at step 2</h2>'; |
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68 | echo '<p>'.$data['error']['message'].'</p>'; |
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69 | die(); |
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70 | } |
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71 | $access_token = $data['access_token']; |
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72 | |||
73 | // Get user infos |
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74 | |||
1149 | daniel-mar | 75 | $cont = url_post_contents( |
76 | "https://graph.facebook.com/v8.0/me?". |
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77 | "fields=id,email,name&". |
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78 | "access_token=".urlencode($access_token) |
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635 | daniel-mar | 79 | ); |
1149 | daniel-mar | 80 | |
81 | if ($cont === false) { |
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82 | throw new OIDplusException(_L('Communication with %1 server failed', 'Facebook')); |
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83 | } |
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84 | |||
635 | daniel-mar | 85 | $data = json_decode($cont,true); |
86 | if (isset($data['error'])) { |
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87 | throw new OIDplusException(_L('Error receiving the authentication token from %1: %2','Facebook',$data['error']['message'])); |
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88 | } |
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89 | $personal_name = $data['name']; |
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90 | $email = !isset($data['email']) ? '' : $data['email']; |
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91 | if (empty($email)) { |
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92 | throw new OIDplusException(_L('Your Facebook account does not have an email address.')); |
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93 | } |
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94 | |||
95 | // Everything's done! Now login and/or create account |
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96 | |||
705 | daniel-mar | 97 | $ra = new OIDplusRA($email); |
98 | if (!$ra->existing()) { |
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99 | $ra->register_ra(null); // create a user account without password |
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635 | daniel-mar | 100 | |
705 | daniel-mar | 101 | OIDplus::db()->query("update ###ra set ra_name = ?, personal_name = ? where email = ?", array($personal_name, $personal_name, $email)); |
635 | daniel-mar | 102 | |
1267 | daniel-mar | 103 | OIDplus::logger()->log("V2:[INFO]RA(%1)", "RA '%1' was created because of successful Facebook OAuth2 login", $email); |
705 | daniel-mar | 104 | } |
635 | daniel-mar | 105 | |
705 | daniel-mar | 106 | OIDplus::authUtils()->raLoginEx($email, $remember_me=false, 'Facebook-OAuth2'); |
635 | daniel-mar | 107 | |
705 | daniel-mar | 108 | OIDplus::db()->query("UPDATE ###ra set last_login = ".OIDplus::db()->sqlDate()." where email = ?", array($email)); |
635 | daniel-mar | 109 | |
705 | daniel-mar | 110 | // Go back to OIDplus |
635 | daniel-mar | 111 | |
1005 | daniel-mar | 112 | OIDplus::invoke_shutdown(); |
113 | |||
801 | daniel-mar | 114 | header('Location:'.OIDplus::webpath(null,OIDplus::PATH_ABSOLUTE_CANONICAL)); |