deblan-mirror/24eme-signaturepdf
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key and hash created in the javascript

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This commit is contained in:
tale-fau 2023-11-09 17:25:42 +01:00
parent 12043408cc
commit 47ef75562f
4 changed files with 44 additions and 20 deletions
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12
app.php
View file

@ -195,7 +195,7 @@ require_once 'lib/cryptography.class.php';
$f3->route('POST /share',
function($f3) {
$hash = substr(hash('sha512', uniqid().rand()), 0, 20);
$hash = Web::instance()->slug($_POST['hash']);
$sharingFolder = $f3->get('PDF_STORAGE_PATH').$hash;
$f3->set('UPLOADS', $sharingFolder."/");
if (!is_dir($f3->get('PDF_STORAGE_PATH'))) {
@ -240,10 +240,9 @@ $f3->route('POST /share',
if(!$f3->get('DEBUG')) {
array_map('cryptographyClass::hardUnlink', glob($tmpfile."*.svg"));
}
$symmetricKey = CryptographyClass::createSymmetricKey();
setcookie($hash, $symmetricKey, ['expires' => 0, 'samesite' => 'Strict', 'path' => "/"]);
$encryptor = new CryptographyClass($symmetricKey, $f3->get('PDF_STORAGE_PATH').$hash);
$symmetricKey = $_COOKIE[$hash];
$encryptor = new CryptographyClass($_COOKIE[$hash], $f3->get('PDF_STORAGE_PATH').$hash);
$encryptor->encrypt();
@ -258,11 +257,10 @@ $f3->route('GET /signature/@hash/pdf',
$hash = Web::instance()->slug($f3->get('PARAMS.hash'));
$sharingFolder = $f3->get('PDF_STORAGE_PATH').$hash;
if (CryptographyClass::isSymmetricKeyValid($_COOKIE[$hash]) == false) {
$cryptor = new CryptographyClass(CryptographyClass::protectSymmetricKey($_COOKIE[$hash]), $f3->get('PDF_STORAGE_PATH').$hash);
if ($cryptor->decrypt() == false) {
$f3->error(403);
}
$cryptor = new CryptographyClass($_COOKIE[$hash], $f3->get('PDF_STORAGE_PATH').$hash);
$cryptor->decrypt();
$files = scandir($sharingFolder);
$originalFile = $sharingFolder.'/original.pdf';

7
lib/cryptography.class.php
View file

@ -42,7 +42,7 @@ class CryptographyClass
$result = shell_exec($command);
if ($result === false) {
echo "Decypher failure";
exit;
return $result;
}
$this->hardUnlink($file);
}
@ -53,14 +53,13 @@ class CryptographyClass
if (!$element) {
return;
}
print_r(['hu', $element]);
$eraser = str_repeat(0, strlen(file_get_contents($element)));
file_put_contents($element, $eraser);
unlink($element);
}
public static function isSymmetricKeyValid($key) {
return (bool)preg_match('/^[0-9a-zA-Z]{15}$/', $key);
public static function protectSymmetricKey($key) {
return preg_replace('/[^0-9a-zA-Z]*/', '', $key);
}
public static function createSymmetricKey() {

40
public/js/signature.js
View file

@ -818,6 +818,10 @@ var createEventsListener = function() {
}
document.getElementById('input_svg_share').files = dataTransfer.files;
hasModifications = false;
document.getElementById('input_pdf_hash').value = generatePdfHash();
document.getElementById('input_symmetric_key').value = generateSymmetricKey();
storeSymmetricKeyCookie(document.getElementById('input_pdf_hash').value, document.getElementById('input_symmetric_key').value);
});
}
@ -1111,7 +1115,6 @@ var pageSignature = async function(url) {
let filename = url.replace('/pdf/', '');
if(pdfHash) {
storeSymmetricKeyCookie();
let response = await fetch(url);
if(response.status != 200) {
return;
@ -1165,13 +1168,36 @@ var pageSignature = async function(url) {
})
})();
function storeSymmetricKeyCookie() {
let symmetricKey = window.location.hash;
if (symmetricKey.length != 19) {
function storeSymmetricKeyCookie(hash, symmetricKey) {
if (symmetricKey.length != 15) {
console.error("Erreur taille cle symmetrique.");
return;
} else if (symmetricKey.substr(0, 4) != "#sk:") {
console.error("Erreur format cle symmetrique");
}
document.cookie = pdfHash + "=" + symmetricKey.substr(4, 15) + "; SameSite=Strict";
document.cookie = hash + "=" + symmetricKey + "; SameSite=Strict";
}
function generateSymmetricKey() {
const length = 15;
const keySpace = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
let key = '';
for (let i = 0; i < length; ++i) {
const randomIndex = Math.floor(Math.random() * keySpace.length);
key += keySpace.charAt(randomIndex);
}
return key;
}
function generatePdfHash() {
const length = 20;
const keySpace = '0123456789abcdefghijklmnopqrstuvwxyz';
let key = '';
for (let i = 0; i < length; ++i) {
const randomIndex = Math.floor(Math.random() * keySpace.length);
key += keySpace.charAt(randomIndex);
}
return key;
}

5
templates/signature.html.php
View file

@ -112,7 +112,7 @@
</div>
<form id="form_pdf" action="<?php echo $REVERSE_PROXY_URL; ?>/signature/<?php echo $hash ?>/save" method="post" enctype="multipart/form-data" class="d-none d-sm-none d-md-block">
<input id="input_svg" name="svg[]" type="file" class="d-none" />
<!-- <input id="symmetric_key" name="key" type="hidden" value="test" /> -->
<button class="btn btn-primary w-100 mt-2" disabled="disabled" type="submit" id="save"><i class="bi bi-cloud-upload"></i> <?php echo _("Transmit my signature"); ?></button>
</form>
<?php endif; ?>
@ -198,7 +198,8 @@
<form id="form_sharing" clas action="<?php echo $REVERSE_PROXY_URL; ?>/share" method="post" enctype="multipart/form-data">
<input id="input_pdf_share" name="pdf" type="file" class="d-none" />
<input id="input_svg_share" name="svg[]" type="file" class="d-none" />
<!-- <input id="symmetric_key" name="key" type="hidden" value="test" /> -->
<input id="input_pdf_hash" name="hash" type="hidden" value="" />
<input id="input_symmetric_key" name="key" type="hidden" value="" />
<button class="btn col-9 col-md-6 btn-primary" type="submit" id="save_share"><?php echo sprintf(_("%s Start sharing"), '<i class="bi bi-cloud-upload"></i>'); ?></button>
</form>
</div>