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notes.php
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<?php
$title = 'Notes | Aleator Stream';
include("inc/header.inc");
?>
<?php
$db_source = "";
$db_user = "";
$db_passwd = "";
$db_use = "";
$db = new mysqli($db_source, $db_user, $db_passwd, $db_use);
if(isset($_GET['public']) && isset($_GET['dir']) && isset($_GET['note'])){
$dir = $_GET['dir'];
$note = $_GET['note'];
$isPublic = $_GET['public'];
$noteDir = "/var/www/aleator.stream/html/notes/" . $dir . "/" . $note;
/* Check if $dir is a valid MD5. */
if(preg_match('/^[a-f0-9]{32}$/', $dir)){
if($isPublic == 1){
$table = "notes";
}
else{
$table = "notes_" . $dir;
}
}
else{
print '<p>';
print '<strong>Error</strong>';
print '</p>';
print '<p>';
print '<i class="fa fa-exclamation-triangle" aria-hidden="true" style="font-size: 1000%;"></i>';
print '</p>';
print '<p style="font-size: 90%; color: red">';
print "Invalid directory format.";
print '</p>';
include("inc/footer.inc");
exit();
}
$get_note = $db->prepare("SELECT * FROM $table WHERE note_dir = ?");
$get_note->bind_param("s", $note);
$get_note->execute();
$result = $get_note->get_result();
if($result->num_rows == 1){
$row = $result->fetch_array();
print '<p>' . "\n ";
print '<strong>' . "\n ";
if($row['encrypted'] == 1){
$isEncrypted = true;
print "<i class='fa fa-lock' aria-hidden='true'></i> ";
}
print $row['title'] . "\n ";
print '</strong>' . "\n ";
print '</p>' . "\n ";
}
else{
print '<p>';
print '<strong>Error</strong>';
print '</p>';
print '<p>';
print '<i class="fa fa-exclamation-triangle" aria-hidden="true" style="font-size: 1000%;"></i>';
print '</p>';
print '<p style="font-size: 90%; color: red">';
print "Note not found in database.";
print '</p>';
include("inc/footer.inc");
exit();
}
print '<code>' . "\n ";
if(file_exists("$noteDir")){
$file = fopen("$noteDir","r");
while(!feof($file)){
echo fgets($file) . "\n " . "<br>";
}
print "\n ";
fclose($file);
}
else{
print '<p>';
print '<strong>Error</strong>';
print '</p>';
print '<p>';
print '<i class="fa fa-exclamation-triangle" aria-hidden="true" style="font-size: 1000%;"></i>';
print '</p>';
print '<p style="font-size: 90%; color: red">';
print "Note not found on server.";
print '</p>';
include("inc/footer.inc");
exit();
}
print '</code>' . "\n \n ";
print '<p>' . "\n ";
print "<a href='notes/" . md5(strtolower($row['uploader'])) . "/" . $row['note_dir'] . "'>" . "Raw format" . "</a>" . " | " . "\n ";
print "<a href='notes/" . md5(strtolower($row['uploader'])) . "/" . $row['note_dir'] . "' download>" . "Download" . "</a>";
if(isset($_SESSION['username'])){
$username = $_SESSION['username'];
$usrHash = md5(strtolower($username));
if($dir == $usrHash){
if(isset($_GET['delete'])){
if(isset($_POST['password'])){
if($_POST['password'] != null){
$password = $_POST['password'];
$verification = $db->prepare("SELECT * FROM users WHERE username = ? LIMIT 1");
$verification->bind_param("s", $username);
$verification->execute();
$result = $verification->get_result();
if($result->num_rows == 1){
$row = $result->fetch_array();
$hashed_password = $row['password'];
if(password_verify($password, $hashed_password)){
if(file_exists("$noteDir")){
//delete note
$escapedNoteDir = escapeshellcmd($noteDir);
shell_exec("rm -f $escapedNoteDir");
//remove from table
$delete_note = $db->prepare("DELETE FROM $table WHERE note_dir = ?");
$delete_note->bind_param("s", $note);
$delete_note->execute();
header("Location:/notes.php");
exit();
}
else{
print '<p>';
print '<strong>Error</strong>';
print '</p>';
print '<p>';
print '<i class="fa fa-exclamation-triangle" aria-hidden="true" style="font-size: 1000%;"></i>';
print '</p>';
print '<p style="font-size: 90%; color: red">';
print "Note not found on server.";
print '</p>';
include("inc/footer.inc");
exit();
}
}
else{
print '<p>';
print '<strong>Error</strong>';
print '</p>';
print '<p>';
print '<i class="fa fa-exclamation-triangle" aria-hidden="true" style="font-size: 1000%;"></i>';
print '</p>';
print '<p style="font-size: 90%; color: red">';
print "Invalid user password.";
print '</p>';
include("inc/footer.inc");
exit();
}
}
else{
print '<p>';
print '<strong>Error</strong>';
print '</p>';
print '<p>';
print '<i class="fa fa-exclamation-triangle" aria-hidden="true" style="font-size: 1000%;"></i>';
print '</p>';
print '<p style="font-size: 90%; color: red">';
print "Note not found in database.";
print '</p>';
include("inc/footer.inc");
exit();
}
}
print '<p>';
print '<strong>Error</strong>';
print '</p>';
print '<p>';
print '<i class="fa fa-exclamation-triangle" aria-hidden="true" style="font-size: 1000%;"></i>';
print '</p>';
print '<p style="font-size: 90%; color: red">';
print "User password cannot be null.";
print '</p>';
include("inc/footer.inc");
exit();
}
else{
print '<p>';
print '<strong>Error</strong>';
print '</p>';
print '<p>';
print '<i class="fa fa-exclamation-triangle" aria-hidden="true" style="font-size: 1000%;"></i>';
print '</p>';
print '<p style="font-size: 90%; color: red">';
print "User password missing from this deletion request.";
print '</p>';
include("inc/footer.inc");
exit();
}
}
print " | " . "\n " . '<a href="javascript:displayNoteDelete()" style="color: red;">Delete</a>' . "\n \n ";
print '<div id="noteDeletion" style="display:none; font-size: 85%;">' . "\n ";
print '<p>' . "\n ";
print '<strong>Note deletion</strong>' . "\n ";
print '</p>' . "\n ";
print '<p style="font-size: 65%;">For security, your user password is required to delete content.</p>' . "\n ";
print "<form action='notes.php?public=$isPublic&dir=$dir¬e=$note&delete' method='post' enctype='multipart/form-data'>" . "\n ";
print 'Password: <input type="password" name="password"/>' . "\n ";
print '<input type="submit" value="Delete">' . "\n ";
print '</form>' . "\n ";
print '</p>' . "\n ";
print '</div>' . "\n ";
}
}
print '</p>' . "\n \n ";
if($isEncrypted){
$cipher = $row['cipher'];
print '<div id="noteDecryption" style="font-size: 85%;">' . "\n ";
print '<p>' . "\n ";
print '<strong>Note decryption</strong>' . "\n ";
print "<form action='notes.php?public=$isPublic&dir=$dir¬e=$note&decrypt' method='post' enctype='multipart/form-data'>" . "\n ";
print 'Key: <input type="password" name="key"/>' . "\n ";
print '<input type="submit" value="Decrypt">' . '<span style="font-size: 70%;"> (' . strtoupper($cipher) . ')</span>' . "\n ";
print '</form>' . "\n ";
print '</p>' . "\n ";
print '</div>' . "\n \n ";
if(isset($_GET['decrypt'])){
if($_POST['key'] != null){
$key = $_POST['key'];
print '<strong>Decrypted note</strong>' . "\n \n ";
print '<p style="font-size: 70%;">Only see Jibberish? You probably entered an invalid key!</p>' . "\n \n ";
$tmpDir = "/var/www/aleator.stream/tmp/" . $note;
$escapedCipher = escapeshellcmd($cipher);
$escapedNoteDir = escapeshellcmd($noteDir);
$escapedTmpDir = escapeshellcmd($tmpDir);
$escapedKey = escapeshellcmd($key);
shell_exec("openssl $escapedCipher -d -a -in $escapedNoteDir -out $escapedTmpDir -pass pass:$escapedKey");
$output = shell_exec("cat $escapedTmpDir && rm -f $escapedTmpDir");
print "<p>" . "\n ";
print "<pre>$output</pre>" . "\n ";
print "</p>" . "\n \n ";
}
}
}
}
else{
if(isset($_SESSION['username'])){
$username = $_SESSION['username'];
$usrHash = md5(strtolower($username));
print '<h2>Your notes</h2>' . "\n \n ";
print '<strong>Public</strong>' . "\n \n ";
$get_personal_public_notes = $db->prepare("SELECT * FROM notes WHERE uploader = ?");
$get_personal_public_notes->bind_param("s", $username);
$get_personal_public_notes->execute();
$result_personal_public = $get_personal_public_notes->get_result();
if($result_personal_public->num_rows > 0){
while($row = $result_personal_public->fetch_array()){
print "<p>" . "\n ";
print "<a href='notes.php?public=1&dir=" . md5(strtolower($row['uploader'])) . "¬e=" . $row['note_dir'] . "'>" . $row['title'] . "</a>" . "\n ";
print "</p>" . "\n \n ";
}
}
else{
print '<p style="font-size: 85%;">You\'ve published no public notes.</p>' . "\n ";
}
print '<strong>Private</strong>' . "\n \n ";
$personal_private_table = "notes_" . $usrHash;
$get_personal_private_notes = $db->prepare("SELECT * FROM $personal_private_table");
$get_personal_private_notes->execute();
$result_personal_private = $get_personal_private_notes->get_result();
if($result_personal_private->num_rows > 0){
while($row = $result_personal_private->fetch_array()){
print "<p>" . "\n ";
print "<a href='notes.php?public=0&dir=" . md5(strtolower($row['uploader'])) . "¬e=" . $row['note_dir'] . "'>" . $row['title'] . "</a>" . "\n ";
print "</p>" . "\n \n ";
}
}
else{
print '<p style="font-size: 85%;">You\'ve published no private notes.</p>' . "\n \n ";
}
print '<hr>' . "\n \n ";
}
print '<h2>Public notes</h2>' . "\n \n ";
$get_public_notes = $db->prepare("SELECT * FROM notes");
$get_public_notes->execute();
$result_public = $get_public_notes->get_result();
if($result_public->num_rows > 0){
while($row = $result_public->fetch_array()){
print "<p>" . "\n ";
print "<a href='notes.php?public=1&dir=" . md5(strtolower($row['uploader'])) . "¬e=" . $row['note_dir'] . "'>" . $row['title'] . "</a>" . "\n ";
print "</p>" . "\n ";
}
}
else{
print '<p style="font-size: 85%;">There are no public notes on the server.</p>';
}
}
include("inc/footer.inc");
?>
</div>
</body>
</html>