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<?php
/**
* SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OCA\Files_External\Lib\Auth\PublicKey;
use OCA\Files_External\Lib\Auth\AuthMechanism;
use OCA\Files_External\Lib\DefinitionParameter;
use OCA\Files_External\Lib\StorageConfig;
use OCP\IConfig;
use OCP\IL10N;
use OCP\IUser;
use phpseclib\Crypt\RSA as RSACrypt;
/**
* RSA public key authentication
*/
class RSA extends AuthMechanism {
public function __construct(
IL10N $l,
private IConfig $config,
) {
$this
->setIdentifier('publickey::rsa')
->setScheme(self::SCHEME_PUBLICKEY)
->setText($l->t('RSA public key'))
->addParameters([
new DefinitionParameter('user', $l->t('Login')),
new DefinitionParameter('public_key', $l->t('Public key')),
(new DefinitionParameter('private_key', 'private_key'))
->setType(DefinitionParameter::VALUE_HIDDEN),
])
->addCustomJs('public_key')
;
}
/**
* @return void
*/
public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null) {
$auth = new RSACrypt();
$auth->setPassword($this->config->getSystemValue('secret', ''));
if (!$auth->loadKey($storage->getBackendOption('private_key'))) {
// Add fallback routine for a time where secret was not enforced to be exists
$auth->setPassword('');
if (!$auth->loadKey($storage->getBackendOption('private_key'))) {
throw new \RuntimeException('unable to load private key');
}
}
$storage->setBackendOption('public_key_auth', $auth);
}
/**
* Generate a keypair
*
* @param int $keyLenth
* @return array ['privatekey' => $privateKey, 'publickey' => $publicKey]
*/
public function createKey($keyLength) {
$rsa = new RSACrypt();
$rsa->setPublicKeyFormat(RSACrypt::PUBLIC_FORMAT_OPENSSH);
$rsa->setPassword($this->config->getSystemValue('secret', ''));
if ($keyLength !== 1024 && $keyLength !== 2048 && $keyLength !== 4096) {
$keyLength = 1024;
}
return $rsa->createKey($keyLength);
}
}
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