include/lucidAuth.functions.php

@@ -38,10 +38,11 @@ function authenticateLDAP (string $username, string $password) {
 			$commonName = ldap_get_entries($ds, $ldapSearchResults)[0]['cn'][0];
 			// Create JWT-payload
 			$jwtPayload = [
-				'iat'	=> time(),					// Issued at: time when the token was generated
+				'iat'	=> time(),                                              // Issued at: time when the token was generated
-				'iss'	=> $_SERVER['SERVER_NAME'],	// Issuer
+				'iss'	=> $_SERVER['SERVER_NAME'],                             // Issuer
-				'sub'	=> $qualifiedUsername,		// Subject (ie. username)
+				'sub'	=> $qualifiedUsername,                                  // Subject (ie. username)
-				'name'	=> $commonName				// Common name (as retrieved from AD)
+                'name'	=> $commonName,                                         // Common name (as retrieved from AD)
+                'fp'    => base64_encode(json_encode(get_browser(null, True)))  // Fingerprint (based on `HTTP_USER_AGENT`)
 			];
 
 			$secureToken = JWT::encode($jwtPayload, base64_decode($settings->JWT['PrivateKey_base64']));
@@ -121,8 +122,8 @@ function validateToken (string $secureToken) {
 		WHERE LOWER(User.Username) = :username
 	');
 	$pdoQuery->execute([
-			':username'	=>	(string) strtolower($jwtPayload->sub)
+		':username'	=>	(string) strtolower($jwtPayload->sub)
-		]);
+	]);
 	foreach($pdoQuery->fetchAll(PDO::FETCH_ASSOC) as $row) {
 		try {
 			$storedTokens[] = JWT::decode($row['Value'], base64_decode($settings->JWT['PrivateKey_base64']), $settings->JWT['Algorithm']);
@@ -136,7 +137,9 @@ function validateToken (string $secureToken) {
 	if (!empty($storedTokens) && sizeof(array_filter($storedTokens, function ($value) use ($jwtPayload) {
 		return $value->iat === $jwtPayload->iat;
 	})) === 1) {
-		return [
+        purgeTokens($currentUserId, $settings->Session['Duration']);
+
+        return [
 			'status'	=> 'Success',
 			'name'		=> $jwtPayload->name,
             'uid'       => $currentUserId
@@ -149,4 +152,54 @@ function validateToken (string $secureToken) {
 	}
 }
 
+function purgeTokens(int $userID, int $maximumTokenAge) {
+	global $settings, $pdoDB;
+
+    $defunctTokens = []; $expiredTokens = [];
+
+    $pdoQuery = $pdoDB->prepare('
+		SELECT SecureToken.Id, SecureToken.Value
+		FROM SecureToken
+		WHERE SecureToken.UserId = :userid
+	');
+	$pdoQuery->execute([
+		':userid'	=>	(int) $userID
+	]);
+	foreach($pdoQuery->fetchAll(PDO::FETCH_ASSOC) as $row) {
+		try {
+            $token = JWT::decode($row['Value'], base64_decode($settings->JWT['PrivateKey_base64']), $settings->JWT['Algorithm']);
+            if ($token->iat < (time() - $maximumTokenAge)) {
+                $expiredTokens[] = $row['Id'];
+            }
+		} catch (Exception $e) {
+			$defunctTokens[] = $row['Id'];
+		}
+    }
+
+    try {
+        // Sadly, PDO does not support named parameters in constructions like 'IN ( :array )'
+        //   instead, the supported syntax is unnamed placeholders like 'IN (?, ?, ?, ...)'
+        $pdoQuery = $pdoDB->prepare('
+            DELETE FROM SecureToken
+            WHERE SecureToken.Id IN (' . implode( ',', array_fill(0, count(array_merge($defunctTokens, $expiredTokens)), '?')) . ')
+        ');
+        $pdoQuery->execute(array_merge($defunctTokens, $expiredTokens));
+
+        if ($settings->Debug['LogToFile']) {
+            file_put_contents('../purgeToken.log', (new DateTime())->format('Y-m-d\TH:i:s.u') . ' --- Garbage collection succeeded (' . $userID . ' => ' . $pdoQuery->rowCount() . ')' . PHP_EOL, FILE_APPEND);
+        }
+
+        return [
+            'status'    => 'Success',
+            'amount'    => $pdoQuery->rowCount()
+        ];
+    } catch (Exception $e) {
+        if ($settings->Debug['LogToFile']) {
+            file_put_contents('../purgeToken.log', (new DateTime())->format('Y-m-d\TH:i:s.u') . ' --- Garbage collection failed (' . $userID . ' => ' . $e . ')' . PHP_EOL, FILE_APPEND);
+        }
+
+        return ['status' => 'Fail', 'reason' => $e];
+    }
+}
+
 ?>

include/lucidAuth.template.php

@@ -130,6 +130,22 @@ $contentLayout['manage']['section'] = <<<'MANAGE_SECTION'
                     %1$s
                   </tbody>
                 </table>
+                <div id="sessions">
+                  <span data-translation="label_sessions" style="float: left; margin-left: 5px;">Sessions</span>
+                  <br>
+                  <table id="sessiontable">
+                    <thead>
+                      <tr>
+                        <th data-translation="th_timestamp">Timestamp</th>
+                        <th data-translation="th_origin">&lt;origin&gt;</th>
+                        <th data-translation="th_description">Description</th>
+                        <th data-translation="th_manage">Manage</th>
+                      </tr>
+                    </thead>
+                    <tbody>
+                    </tbody>
+                  </table>
+                </div>
               </li>
             </ul>
 MANAGE_SECTION;

public/lucidAuth.manage.php

@@ -9,23 +9,36 @@
 
 	if ($validateTokenResult['status'] === "Success") {
         if ($_REQUEST['do'] === 'retrievesessions') {
+            $storedTokens = [];
+
             $pdoQuery = $pdoDB->prepare('
                 SELECT SecureToken.Id, SecureToken.UserId, SecureToken.Value
                 FROM SecureToken
-                WHERE SecureToken.Id = :userid
+                WHERE SecureToken.UserId = :userid
             ');
             $pdoQuery->execute([
                 ':userid'	=>	(int) $_REQUEST['userid']
             ]);
             foreach($pdoQuery->fetchAll(PDO::FETCH_ASSOC) as $row) {
-                //bla
+                try {
+                    $JWTPayload = JWT::decode($row['Value'], base64_decode($settings->JWT['PrivateKey_base64']), $settings->JWT['Algorithm']);
+                    $storedTokens[] = [
+                        'iat'	=> $JWTPayload->iat,
+                        'iss'	=> $JWTPayload->iss,
+                        'fp'    => $JWTPayload->fp
+                    ];
+                } catch (Exception $e) {
+                    // Invalid token
+                    continue;
+                }
             }
 
             // Return JSON object
 			header('Content-Type: application/json');
 			echo json_encode([
 				"Result"       => "Success",
-                "UserSessions" => json_encode( $moo )
+                "SessionCount" => sizeof($storedTokens),
+                "UserSessions" => json_encode($storedTokens)
 			]);
         } else {
             // No action requested, default action

public/misc/script.manage.js

@@ -2,14 +2,43 @@ $(document).ready(function(){
     // Initialize the editable-table functionality
     $('#usertable').editableTableWidget();
 
+    // Prevent clicking *through* popup-screens
+    $('#sessions').click(function(event) {
+        event.stopPropagation();
+    });
+    
     // Add eventhandlers to buttons
     $('#usertable button.session').click(function() {
+        event.stopPropagation();
+        $('#sessions tbody').empty();
+        $('#sessions').fadeToggle();
+
         $.post("lucidAuth.manage.php", {
 			do: "retrievesessions",
 			userid: $(this).closest('tr').find('td:nth-child(1)').data('userid')
 		})
 		.done(function(data,_status) {
 			if (data.Result === 'Success') {
+                var Sessions = JSON.parse(data.UserSessions);
+                for (var i = 0; i < data.SessionCount; i++) {
+                    try {
+                        var Fingerprint = JSON.parse(atob(Sessions[i]['fp']));
+                    } catch(e) {
+                        // Do nothing
+                    } 
+                    $('#sessiontable tbody').append($('<tr>')
+                        .append($('<td>', {
+                            text: new Date(Sessions[i]['iat'] * 1000).toLocaleString('en-GB')
+                        }))
+                        .append($('<td>', {
+                            text: Sessions[i]['iss']
+                        }))
+                        .append($('<td>', {
+//                            text: Sessions[i]['fp'] ? atob(Sessions[i]['fp'])['browser'] + '(' + atob(Sessions[i]['fp'])['platform'] + ')' : ''
+                            text: Fingerprint ? Fingerprint['browser'] + ' (' + Fingerprint['platform'] + ')' : ''
+                        }))
+                    );
+                }
 			} else {
 			}
 		});
@@ -107,4 +136,8 @@ console.log({'new': newEntries, 'removed': removedEntries});
 		}
 	});
 
+});
+
+$(document).click(function () {
+    $('#sessions').fadeOut();
 });

public/misc/script.translation.js

@@ -7,7 +7,8 @@ var locales = {
 		button_delete:				"delete",
 		button_login:				"login",
 		heading_error:				"ERROR!",
-		label_password:				"Password:",
+        label_password:				"Password:",
+        label_sessions:				"Sessions",
 		label_username:				"Username:",
 		link_logout:				"Logout",
 		span_credentialsavailable:	"Login credentials available upon request!",
@@ -24,7 +25,8 @@ var locales = {
 		button_delete:				"verwijder",
 		button_login:				"log in",
 		heading_error:				"FOUT!",
-		label_password:				"Wachtwoord:",
+        label_password:				"Wachtwoord:",
+        label_sessions:				"Sessies",
 		label_username:				"Gebruikersnaam:",
 		link_logout:				"Log uit",
 		span_credentialsavailable:	"Inloggegevens verkrijgbaar op aanvraag!",

public/misc/style.css

@@ -129,6 +129,23 @@ body {
             .main section .buttons button {
                 margin-left: inherit;
             }
+        .main section #sessions {
+			display: none;
+			position: absolute;
+			top: calc(50% - 160px);
+			right: 20%;
+			height: 320px;
+			width: 60%;
+			border: 1px solid rgb(0, 51, 153);
+			box-shadow: black 0px 0px 20px;
+			box-sizing: border-box;
+	    	padding-top: 5px;
+			background: white;
+	    	font-size: inherit;
+	    	font-weight: bold;
+            z-index: 99;
+            overflow-y: auto;
+        }
         .main section table {
             width: 100%;
         }