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Rev | Author | Line No. | Line |
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635 | daniel-mar | 1 | <?php |
2 | |||
3 | /* |
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4 | * OIDplus 2.0 |
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5 | * Copyright 2019 - 2021 Daniel Marschall, ViaThinkSoft |
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6 | * |
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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 | |||
20 | # More information about the OAuth2 implementation: |
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21 | # - https://developers.google.com/identity/protocols/oauth2/openid-connect |
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22 | |||
23 | require_once __DIR__ . '/../../../../includes/oidplus.inc.php'; |
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24 | |||
25 | OIDplus::init(true); |
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26 | set_exception_handler(array('OIDplusGui', 'html_exception_handler')); |
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27 | |||
28 | if (OIDplus::baseConfig()->getValue('DISABLE_PLUGIN_OIDplusPagePublicLoginGoogle', false)) { |
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29 | throw new OIDplusException(_L('This plugin was disabled by the system administrator!')); |
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30 | } |
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31 | |||
32 | if (!OIDplus::baseConfig()->getValue('GOOGLE_OAUTH2_ENABLED', false)) { |
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33 | throw new OIDplusException(_L('Google OAuth authentication is disabled on this system.')); |
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34 | } |
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35 | |||
36 | _CheckParamExists($_GET, 'code'); |
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37 | _CheckParamExists($_GET, 'state'); |
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38 | _CheckParamExists($_COOKIE, 'csrf_token_weak'); |
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39 | |||
40 | if ($_GET['state'] != $_COOKIE['csrf_token_weak']) { |
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41 | die(_L('Wrong CSRF Token')); |
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42 | } |
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43 | |||
44 | if (!function_exists('curl_init')) { |
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45 | die(_L('The "%1" PHP extension is not installed at your system. Please enable the PHP extension <code>%2</code>.','CURL','php_curl')); |
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46 | } |
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47 | |||
48 | $ch = curl_init(); |
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49 | if (ini_get('curl.cainfo') == '') curl_setopt($ch, CURLOPT_CAINFO, OIDplus::localpath() . 'vendor/cacert.pem'); |
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50 | curl_setopt($ch, CURLOPT_URL,"https://oauth2.googleapis.com/token"); |
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715 | daniel-mar | 51 | curl_setopt($ch, CURLOPT_USERAGENT, 'ViaThinkSoft-OIDplus/2.0'); |
635 | daniel-mar | 52 | curl_setopt($ch, CURLOPT_POST, 1); |
53 | curl_setopt($ch, CURLOPT_POSTFIELDS, |
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54 | "grant_type=authorization_code&". |
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55 | "code=".urlencode($_GET['code'])."&". |
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801 | daniel-mar | 56 | "redirect_uri=".urlencode(OIDplus::webpath(__DIR__,OIDplus::PATH_ABSOLUTE_CANONICAL).'oauth.php')."&". |
635 | daniel-mar | 57 | "client_id=".urlencode(OIDplus::baseConfig()->getValue('GOOGLE_OAUTH2_CLIENT_ID'))."&". |
58 | "client_secret=".urlencode(OIDplus::baseConfig()->getValue('GOOGLE_OAUTH2_CLIENT_SECRET')) |
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59 | ); |
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60 | curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); |
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61 | $cont = curl_exec($ch); |
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62 | curl_close($ch); |
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63 | |||
64 | // Get ID token and Access token |
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65 | $data = json_decode($cont,true); |
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66 | if (isset($data['error'])) { |
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67 | throw new OIDplusException(_L('Error receiving the authentication token from %1: %2','Google',$data['error'].' '.$data['error_description'])); |
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68 | } |
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69 | $id_token = $data['id_token']; |
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70 | $access_token = $data['access_token']; |
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71 | |||
72 | try { |
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73 | |||
74 | // Decode JWT "id_token" |
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75 | // see https://medium.com/@darutk/understanding-id-token-5f83f50fa02e |
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76 | // Note: We do not need to verify the signature because the token comes directly from Google, |
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77 | // but we do it anyway. Just to be sure! |
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715 | daniel-mar | 78 | $verification_certs = json_decode(url_get_contents('https://www.googleapis.com/oauth2/v1/certs'), true); |
635 | daniel-mar | 79 | \Firebase\JWT\JWT::$leeway = 60; // leeway in seconds |
80 | $data = (array) \Firebase\JWT\JWT::decode($id_token, $verification_certs, array('ES256', 'ES384', 'RS256', 'RS384', 'RS512')); |
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81 | if (!isset($data['iss']) || ($data['iss'] !== 'https://accounts.google.com')) { |
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82 | throw new OIDplusException(_L('JWT token could not be decoded')); |
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83 | } |
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84 | |||
85 | // Check if the email was verified |
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86 | $email = $data['email']; |
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87 | if ($data['email_verified'] != 'true') { |
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88 | throw new OIDplusException(_L('The email address %1 was not verified. Please verify it first!',$email)); |
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89 | } |
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90 | |||
91 | // Everything's done! Now login and/or create account |
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92 | if (!empty($email)) { |
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93 | $ra = new OIDplusRA($email); |
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94 | if (!$ra->existing()) { |
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95 | $ra->register_ra(null); // create a user account without password |
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96 | |||
97 | // Query user infos |
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98 | $ch = curl_init('https://www.googleapis.com/oauth2/v3/userinfo'); // Initialise cURL |
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99 | if (ini_get('curl.cainfo') == '') curl_setopt($ch, CURLOPT_CAINFO, OIDplus::localpath() . 'vendor/cacert.pem'); |
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100 | $data_string = ''; |
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101 | curl_setopt($ch, CURLOPT_HTTPHEADER, array( |
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102 | 'Content-Length: ' . strlen($data_string), |
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103 | "Authorization: Bearer ".$access_token |
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104 | )); |
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105 | curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string); |
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106 | curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); |
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107 | curl_setopt($ch, CURLOPT_POST, 1); |
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108 | curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); |
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109 | $result = curl_exec($ch); |
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110 | curl_close($ch); |
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111 | $data = json_decode($result,true); |
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112 | $personal_name = $data['name']; // = given_name + " " + family_name |
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113 | |||
114 | OIDplus::db()->query("update ###ra set ra_name = ?, personal_name = ? where email = ?", array($personal_name, $personal_name, $email)); |
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115 | |||
116 | OIDplus::logger()->log("[INFO]RA($email)!", "RA '$email' was created because of successful Google OAuth2 login"); |
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117 | } |
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118 | |||
119 | OIDplus::authUtils()->raLoginEx($email, $remember_me=false, 'Google-OAuth2'); |
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120 | |||
121 | OIDplus::db()->query("UPDATE ###ra set last_login = ".OIDplus::db()->sqlDate()." where email = ?", array($email)); |
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122 | |||
123 | // Go back to OIDplus |
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124 | |||
801 | daniel-mar | 125 | header('Location:'.OIDplus::webpath(null,OIDplus::PATH_ABSOLUTE_CANONICAL)); |
635 | daniel-mar | 126 | } |
127 | |||
128 | } finally { |
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129 | |||
130 | // We now have the data of the person that wanted to log in |
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131 | // So we can log off again |
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132 | $ch = curl_init(); |
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133 | if (ini_get('curl.cainfo') == '') curl_setopt($ch, CURLOPT_CAINFO, OIDplus::localpath() . 'vendor/cacert.pem'); |
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134 | curl_setopt($ch, CURLOPT_URL,"https://oauth2.googleapis.com/revoke"); |
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715 | daniel-mar | 135 | curl_setopt($ch, CURLOPT_USERAGENT, 'ViaThinkSoft-OIDplus/2.0'); |
635 | daniel-mar | 136 | curl_setopt($ch, CURLOPT_POST, 1); |
137 | curl_setopt($ch, CURLOPT_POSTFIELDS, |
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138 | "client_id=".urlencode(OIDplus::baseConfig()->getValue('GOOGLE_OAUTH2_CLIENT_ID'))."&". |
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139 | "client_secret=".urlencode(OIDplus::baseConfig()->getValue('GOOGLE_OAUTH2_CLIENT_SECRET'))."&". |
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140 | "token_type_hint=access_token&". |
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141 | "token=".urlencode($access_token) |
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142 | ); |
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143 | curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); |
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144 | curl_exec($ch); |
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145 | curl_close($ch); |
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146 | |||
147 | } |