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heyitsnovi/FileEncryptDecrypt.php

Created May 6, 2020 07:47
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FileEncryptDecrypt.php
<?php
$ALGORITHM = 'AES-128-CBC';
$IV = '12dasdq3g5b2434b';
$error = '';
if (isset($_POST) && isset($_POST['action'])) {
$password = isset($_POST['password']) && $_POST['password']!='' ? $_POST['password'] : null;
$action = isset($_POST['action']) && in_array($_POST['action'],array('c','d')) ? $_POST['action'] : null;
$file = isset($_FILES) && isset($_FILES['file']) && $_FILES['file']['error'] == UPLOAD_ERR_OK ? $_FILES['file'] : null;
if ($password === null) {
$error .= 'Invalid Password<br>';
}
if ($action === null) {
$error .= 'Invalid Action<br>';
}
if ($file === null) {
$error .= 'Errors occurred while elaborating the file<br>';
}
if ($error === '') {
$contenuto = '';
$nomefile = '';
$contenuto = file_get_contents($file['tmp_name']);
$filename = $file['name'];
switch ($action) {
case 'c':
$contenuto = openssl_encrypt($contenuto, $ALGORITHM, $password, 0, $IV);
$filename = $filename . '.crypto';
break;
case 'd':
$contenuto = openssl_decrypt($contenuto, $ALGORITHM, $password, 0, $IV);
$filename = preg_replace('#\.crypto$#','',$filename);
break;
}
if ($contenuto === false) {
$error .= 'Errors occurred while encrypting/decrypting the file ';
}
if ($error === '') {
header("Pragma: public");
header("Pragma: no-cache");
header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Expires: 0");
header("Content-Type: application/octet-stream");
header("Content-Disposition: attachment; filename=\"" . $filename . "\";");
$size = strlen($contenuto);
header("Content-Length: " . $size);
echo $contenuto;
die;
}
}
}
?>
<html>
<head>
<title>Encrypt/Decrypt file</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
</head>
<body>
<div class="container">
<div class="row">
<div class="col-12" >
<h1>Utility to encrypt/decrypt a file</h1>
</div>
</div>
<?php if ($error != '') { ?>
<div class="row">
<div class="col-12 alert alert-danger" role="alert">
<?php echo ($error); ?>
</div>
</div>
<?php } ?>
<form class="form" enctype="multipart/form-data" method="post" id="form1" name="form1" auto-complete="off">
<div class="form-row">
<div class="form-group">
<label for="file">File</label>
<input type="file" name="file" id="file" placeholder="Choose a file" required class="form-control-file"/>
</div>
</div>
<div class="form-row">
<div class="form-group">
<label for="password">Password</label>
<input type="password" name="password" id="password" placeholder="Insert password" required class="form-control" />
</div>
</div>
<div class="form-row">
<div class="form-group">
<label for="action">Action</label>
<select name="action" id="action" required class="form-control">
<option value="">-- Choose --</option>
<option value="c">Encrypt</option>
<option value="d">Decrypt</option>
</select>
</div>
</div>
<div class="form-row">
<button type="submit" class="btn btn-primary" onclick="setTimeout('document.form1.reset();',1000)">Execute</button>
<button type="reset" class="btn btn-reset">Reset</button>
</div>
</form>
</div>
<script type="text/javascript" src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<script type="text/javascript" src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.bundle.min.js"></script>
</body>
</html>
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