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Add keypath getter and keyfile overwriter functions

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tale-fau 2023-11-03 18:02:09 +01:00
parent 579379318f
commit 817325eea4
3 changed files with 31 additions and 4 deletions
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1
app.php
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@ -256,6 +256,7 @@ $f3->route('GET /signature/@hash/pdf',
$cryptor = new CryptographyClass();
$cryptor->decrypt($hash);
$files = scandir($sharingFolder);
$originalFile = $sharingFolder.'/original.pdf';
$finalFile = $sharingFolder.'/'.$f3->get('PARAMS.hash').uniqid().'.pdf';

33
lib/cryptography.class.php
View file

@ -2,12 +2,15 @@
class CryptographyClass
{
const KEY_SIZE = 4;
public function encrypt($hash) {
$key = "test";
foreach (glob("/tmp/".$hash.'/*.pdf') as $file) {
$outputFile = $file.".gpg";
$command = "echo '$key' | gpg --batch --passphrase-fd 0 --symmetric --cipher-algo AES256 -o $outputFile $file";
$keyPath = $this->getKeyPath();
$command = "gpg --batch --passphrase-file $keyPath --symmetric --cipher-algo AES256 -o $outputFile $file";
$result = shell_exec($command);
$this->freeKeyFile($keyPath);
if ($result === false) {
echo "Cypher failure";
exit;
@ -17,11 +20,12 @@ class CryptographyClass
}
public function decrypt($hash) {
$key = "test";
foreach (glob("/tmp/".$hash.'/*.gpg') as $file) {
$outputFile = str_replace(".gpg", "", $file);
$command = "echo '$key' | gpg --batch --passphrase-fd 0 --decrypt -o $outputFile $file";
$keyPath = $this->getKeyPath();
$command = "gpg --batch --passphrase-file $keyPath --decrypt -o $outputFile $file";
$result = shell_exec($command);
$this->freeKeyFile($keyPath);
if ($result === false) {
echo "Decypher failure";
exit;
@ -30,5 +34,26 @@ class CryptographyClass
}
}
private function getKeyPath() {
$path = "../key.txt";
if (file_put_contents($path, 'test') === false)
{
echo "passphrase generation failure";
exit;
}
return $path;
}
private function freeKeyFile($keyPath) {
$passphrase_overwrite = str_repeat("0", self::KEY_SIZE);
if (file_put_contents($keyPath, $passphrase_overwrite) === false)
{
echo "passphrase generation failure";
exit;
}
}
}
?>

1
templates/signature.html.php
View file

@ -197,6 +197,7 @@
<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" />
<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>