From 1084e3adc7636787a139b68335112715b187b3bb Mon Sep 17 00:00:00 2001 From: Robin McCorkell Date: Wed, 12 Aug 2015 22:20:08 +0100 Subject: [PATCH] Migrate SFTP_Key external storage to new API The SFTP backend now supports public key authentication alongside password authentication. --- apps/files_external/appinfo/app.php | 13 -- apps/files_external/appinfo/application.php | 4 + apps/files_external/appinfo/routes.php | 2 +- apps/files_external/js/public_key.js | 46 ++++ apps/files_external/js/sftp_key.js | 53 ----- .../files_external/lib/auth/publickey/rsa.php | 65 ++++++ apps/files_external/lib/backend/sftp.php | 1 + apps/files_external/lib/backend/sftp_key.php | 48 ++++ apps/files_external/lib/sftp.php | 17 +- apps/files_external/lib/sftp_key.php | 215 ------------------ 10 files changed, 177 insertions(+), 287 deletions(-) create mode 100644 apps/files_external/js/public_key.js delete mode 100644 apps/files_external/js/sftp_key.js create mode 100644 apps/files_external/lib/auth/publickey/rsa.php create mode 100644 apps/files_external/lib/backend/sftp_key.php delete mode 100644 apps/files_external/lib/sftp_key.php diff --git a/apps/files_external/appinfo/app.php b/apps/files_external/appinfo/app.php index 351b87c4c8..f33012b5f0 100644 --- a/apps/files_external/appinfo/app.php +++ b/apps/files_external/appinfo/app.php @@ -40,7 +40,6 @@ OC::$CLASSPATH['OC\Files\Storage\SMB'] = 'files_external/lib/smb.php'; OC::$CLASSPATH['OC\Files\Storage\AmazonS3'] = 'files_external/lib/amazons3.php'; OC::$CLASSPATH['OC\Files\Storage\Dropbox'] = 'files_external/lib/dropbox.php'; OC::$CLASSPATH['OC\Files\Storage\SFTP'] = 'files_external/lib/sftp.php'; -OC::$CLASSPATH['OC\Files\Storage\SFTP_Key'] = 'files_external/lib/sftp_key.php'; OC::$CLASSPATH['OC_Mount_Config'] = 'files_external/lib/config.php'; OC::$CLASSPATH['OCA\Files\External\Api'] = 'files_external/lib/api.php'; @@ -68,17 +67,5 @@ if (OCP\Config::getAppValue('files_external', 'allow_user_mounting', 'yes') == ' // connecting hooks OCP\Util::connectHook('OC_Filesystem', 'post_initMountPoints', '\OC_Mount_Config', 'initMountPointsHook'); -OC_Mount_Config::registerBackend('\OC\Files\Storage\SFTP_Key', [ - 'backend' => (string)$l->t('SFTP with secret key login'), - 'priority' => 100, - 'configuration' => array( - 'host' => (string)$l->t('Host'), - 'user' => (string)$l->t('Username'), - 'public_key' => (string)$l->t('Public key'), - 'private_key' => '#private_key', - 'root' => '&'.$l->t('Remote subfolder')), - 'custom' => 'sftp_key', - ] -); $mountProvider = $appContainer->query('OCA\Files_External\Config\ConfigAdapter'); \OC::$server->getMountProviderCollection()->registerProvider($mountProvider); diff --git a/apps/files_external/appinfo/application.php b/apps/files_external/appinfo/application.php index e5275c29b3..ed236af0ec 100644 --- a/apps/files_external/appinfo/application.php +++ b/apps/files_external/appinfo/application.php @@ -69,6 +69,7 @@ class Application extends App { $container->query('OCA\Files_External\Lib\Backend\Dropbox'), $container->query('OCA\Files_External\Lib\Backend\Google'), $container->query('OCA\Files_External\Lib\Backend\Swift'), + $container->query('OCA\Files_External\Lib\Backend\SFTP_Key'), ]); if (!\OC_Util::runningOnWindows()) { @@ -103,6 +104,9 @@ class Application extends App { // AuthMechanism::SCHEME_OAUTH2 mechanisms $container->query('OCA\Files_External\Lib\Auth\OAuth2\OAuth2'), + // AuthMechanism::SCHEME_PUBLICKEY mechanisms + $container->query('OCA\Files_External\Lib\Auth\PublicKey\RSA'), + // AuthMechanism::SCHEME_OPENSTACK mechanisms $container->query('OCA\Files_External\Lib\Auth\OpenStack\OpenStack'), $container->query('OCA\Files_External\Lib\Auth\OpenStack\Rackspace'), diff --git a/apps/files_external/appinfo/routes.php b/apps/files_external/appinfo/routes.php index 5d7018c347..a371273e74 100644 --- a/apps/files_external/appinfo/routes.php +++ b/apps/files_external/appinfo/routes.php @@ -38,7 +38,7 @@ namespace OCA\Files_External\AppInfo; 'routes' => array( array( 'name' => 'Ajax#getSshKeys', - 'url' => '/ajax/sftp_key.php', + 'url' => '/ajax/public_key.php', 'verb' => 'POST', 'requirements' => array() ) diff --git a/apps/files_external/js/public_key.js b/apps/files_external/js/public_key.js new file mode 100644 index 0000000000..a854606745 --- /dev/null +++ b/apps/files_external/js/public_key.js @@ -0,0 +1,46 @@ +$(document).ready(function() { + + OCA.External.Settings.mountConfig.whenSelectAuthMechanism(function($tr, authMechanism, scheme) { + if (scheme === 'publickey') { + var config = $tr.find('.configuration'); + if ($(config).find('[name="public_key_generate"]').length === 0) { + setupTableRow($tr, config); + } + } + }); + + $('#externalStorage').on('click', '[name="public_key_generate"]', function(event) { + event.preventDefault(); + var tr = $(this).parent().parent(); + generateKeys(tr); + }); + + function setupTableRow(tr, config) { + $(config).append($(document.createElement('input')) + .addClass('button auth-param') + .attr('type', 'button') + .attr('value', t('files_external', 'Generate keys')) + .attr('name', 'public_key_generate') + ); + // If there's no private key, build one + if (0 === $(config).find('[data-parameter="private_key"]').val().length) { + generateKeys(tr); + } + } + + function generateKeys(tr) { + var config = $(tr).find('.configuration'); + + $.post(OC.filePath('files_external', 'ajax', 'public_key.php'), {}, function(result) { + if (result && result.status === 'success') { + $(config).find('[data-parameter="public_key"]').val(result.data.public_key); + $(config).find('[data-parameter="private_key"]').val(result.data.private_key); + OCA.External.Settings.mountConfig.saveStorageConfig(tr, function() { + // Nothing to do + }); + } else { + OC.dialogs.alert(result.data.message, t('files_external', 'Error generating key pair') ); + } + }); + } +}); diff --git a/apps/files_external/js/sftp_key.js b/apps/files_external/js/sftp_key.js deleted file mode 100644 index 55b11b1fac..0000000000 --- a/apps/files_external/js/sftp_key.js +++ /dev/null @@ -1,53 +0,0 @@ -$(document).ready(function() { - - $('#externalStorage tbody tr.\\\\OC\\\\Files\\\\Storage\\\\SFTP_Key').each(function() { - var tr = $(this); - var config = $(tr).find('.configuration'); - if ($(config).find('.sftp_key').length === 0) { - setupTableRow(tr, config); - } - }); - - // We can't catch the DOM elements being added, but we can pick up when - // they receive focus - $('#externalStorage').on('focus', 'tbody tr.\\\\OC\\\\Files\\\\Storage\\\\SFTP_Key', function() { - var tr = $(this); - var config = $(tr).find('.configuration'); - - if ($(config).find('.sftp_key').length === 0) { - setupTableRow(tr, config); - } - }); - - $('#externalStorage').on('click', '.sftp_key', function(event) { - event.preventDefault(); - var tr = $(this).parent().parent(); - generateKeys(tr); - }); - - function setupTableRow(tr, config) { - $(config).append($(document.createElement('input')).addClass('button sftp_key') - .attr('type', 'button') - .attr('value', t('files_external', 'Generate keys'))); - // If there's no private key, build one - if (0 === $(config).find('[data-parameter="private_key"]').val().length) { - generateKeys(tr); - } - } - - function generateKeys(tr) { - var config = $(tr).find('.configuration'); - - $.post(OC.filePath('files_external', 'ajax', 'sftp_key.php'), {}, function(result) { - if (result && result.status === 'success') { - $(config).find('[data-parameter="public_key"]').val(result.data.public_key); - $(config).find('[data-parameter="private_key"]').val(result.data.private_key); - OCA.External.mountConfig.saveStorageConfig(tr, function() { - // Nothing to do - }); - } else { - OC.dialogs.alert(result.data.message, t('files_external', 'Error generating key pair') ); - } - }); - } -}); diff --git a/apps/files_external/lib/auth/publickey/rsa.php b/apps/files_external/lib/auth/publickey/rsa.php new file mode 100644 index 0000000000..b5eecb4271 --- /dev/null +++ b/apps/files_external/lib/auth/publickey/rsa.php @@ -0,0 +1,65 @@ + + * + * @copyright Copyright (c) 2015, ownCloud, Inc. + * @license AGPL-3.0 + * + * This code is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License, version 3, + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License, version 3, + * along with this program. If not, see + * + */ + +namespace OCA\Files_External\Lib\Auth\PublicKey; + +use \OCP\IL10N; +use \OCA\Files_External\Lib\DefinitionParameter; +use \OCA\Files_External\Lib\Auth\AuthMechanism; +use \OCA\Files_External\Lib\StorageConfig; +use \OCP\IConfig; +use \phpseclib\Crypt\RSA as RSACrypt; + +/** + * RSA public key authentication + */ +class RSA extends AuthMechanism { + + /** @var IConfig */ + private $config; + + public function __construct(IL10N $l, IConfig $config) { + $this->config = $config; + + $this + ->setIdentifier('publickey::rsa') + ->setScheme(self::SCHEME_PUBLICKEY) + ->setText($l->t('RSA public key')) + ->addParameters([ + (new DefinitionParameter('user', $l->t('Username'))), + (new DefinitionParameter('public_key', $l->t('Public key'))), + (new DefinitionParameter('private_key', 'private_key')) + ->setType(DefinitionParameter::VALUE_HIDDEN), + ]) + ->setCustomJs('public_key') + ; + } + + public function manipulateStorageConfig(StorageConfig &$storage) { + $auth = new RSACrypt(); + $auth->setPassword($this->config->getSystemValue('secret', '')); + if (!$auth->loadKey($storage->getBackendOption('private_key'))) { + throw new \RuntimeException('unable to load private key'); + } + $storage->setBackendOption('public_key_auth', $auth); + } + +} diff --git a/apps/files_external/lib/backend/sftp.php b/apps/files_external/lib/backend/sftp.php index dd0f5d8e2e..c0bcd27c54 100644 --- a/apps/files_external/lib/backend/sftp.php +++ b/apps/files_external/lib/backend/sftp.php @@ -43,6 +43,7 @@ class SFTP extends Backend { ->setFlag(DefinitionParameter::FLAG_OPTIONAL), ]) ->addAuthScheme(AuthMechanism::SCHEME_PASSWORD) + ->addAuthScheme(AuthMechanism::SCHEME_PUBLICKEY) ->setLegacyAuthMechanism($legacyAuth) ; } diff --git a/apps/files_external/lib/backend/sftp_key.php b/apps/files_external/lib/backend/sftp_key.php new file mode 100644 index 0000000000..4a7f565eb1 --- /dev/null +++ b/apps/files_external/lib/backend/sftp_key.php @@ -0,0 +1,48 @@ + + * + * @copyright Copyright (c) 2015, ownCloud, Inc. + * @license AGPL-3.0 + * + * This code is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License, version 3, + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License, version 3, + * along with this program. If not, see + * + */ + +namespace OCA\Files_External\Lib\Backend; + +use \OCP\IL10N; +use \OCA\Files_External\Lib\Backend\Backend; +use \OCA\Files_External\Lib\DefinitionParameter; +use \OCA\Files_External\Lib\Auth\AuthMechanism; +use \OCA\Files_External\Service\BackendService; +use \OCA\Files_External\Lib\Auth\PublicKey\RSA; + +class SFTP_Key extends Backend { + + public function __construct(IL10N $l, RSA $legacyAuth) { + $this + ->setIdentifier('\OC\Files\Storage\SFTP_Key') + ->setStorageClass('\OC\Files\Storage\SFTP') + ->setText($l->t('SFTP with secret key login [DEPRECATED]')) + ->addParameters([ + (new DefinitionParameter('host', $l->t('Host'))), + (new DefinitionParameter('root', $l->t('Remote subfolder'))) + ->setFlag(DefinitionParameter::FLAG_OPTIONAL), + ]) + ->addAuthScheme(AuthMechanism::SCHEME_PUBLICKEY) + ->setLegacyAuthMechanism($legacyAuth) + ; + } + +} diff --git a/apps/files_external/lib/sftp.php b/apps/files_external/lib/sftp.php index 7f921b5342..921e7283c6 100644 --- a/apps/files_external/lib/sftp.php +++ b/apps/files_external/lib/sftp.php @@ -40,10 +40,11 @@ use phpseclib\Net\SFTP\Stream; class SFTP extends \OC\Files\Storage\Common { private $host; private $user; - private $password; private $root; private $port = 22; + private $auth; + /** * @var SFTP */ @@ -73,8 +74,15 @@ class SFTP extends \OC\Files\Storage\Common { } $this->user = $params['user']; - $this->password - = isset($params['password']) ? $params['password'] : ''; + + if (isset($params['public_key_auth'])) { + $this->auth = $params['public_key_auth']; + } elseif (isset($params['password'])) { + $this->auth = $params['password']; + } else { + throw new \UnexpectedValueException('no authentication parameters specified'); + } + $this->root = isset($params['root']) ? $this->cleanPath($params['root']) : '/'; @@ -112,7 +120,7 @@ class SFTP extends \OC\Files\Storage\Common { $this->writeHostKeys($hostKeys); } - if (!$this->client->login($this->user, $this->password)) { + if (!$this->client->login($this->user, $this->auth)) { throw new \Exception('Login failed'); } return $this->client; @@ -125,7 +133,6 @@ class SFTP extends \OC\Files\Storage\Common { if ( !isset($this->host) || !isset($this->user) - || !isset($this->password) ) { return false; } diff --git a/apps/files_external/lib/sftp_key.php b/apps/files_external/lib/sftp_key.php deleted file mode 100644 index a193b32367..0000000000 --- a/apps/files_external/lib/sftp_key.php +++ /dev/null @@ -1,215 +0,0 @@ - - * @author Morris Jobke - * @author Ross Nicoll - * - * @copyright Copyright (c) 2015, ownCloud, Inc. - * @license AGPL-3.0 - * - * This code is free software: you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License, version 3, - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License, version 3, - * along with this program. If not, see - * - */ -namespace OC\Files\Storage; - -use phpseclib\Crypt\RSA; - -class SFTP_Key extends \OC\Files\Storage\SFTP { - private $publicKey; - private $privateKey; - - /** - * {@inheritdoc} - */ - public function __construct($params) { - parent::__construct($params); - $this->publicKey = $params['public_key']; - $this->privateKey = $params['private_key']; - } - - /** - * Returns the connection. - * - * @return \phpseclib\Net\SFTP connected client instance - * @throws \Exception when the connection failed - */ - public function getConnection() { - if (!is_null($this->client)) { - return $this->client; - } - - $hostKeys = $this->readHostKeys(); - $this->client = new \phpseclib\Net\SFTP($this->getHost()); - - // The SSH Host Key MUST be verified before login(). - $currentHostKey = $this->client->getServerPublicHostKey(); - if (array_key_exists($this->getHost(), $hostKeys)) { - if ($hostKeys[$this->getHost()] !== $currentHostKey) { - throw new \Exception('Host public key does not match known key'); - } - } else { - $hostKeys[$this->getHost()] = $currentHostKey; - $this->writeHostKeys($hostKeys); - } - - $key = $this->getPrivateKey(); - if (is_null($key)) { - throw new \Exception('Secret key could not be loaded'); - } - if (!$this->client->login($this->getUser(), $key)) { - throw new \Exception('Login failed'); - } - return $this->client; - } - - /** - * Returns the private key to be used for authentication to the remote server. - * - * @return RSA instance or null in case of a failure to load the key. - */ - private function getPrivateKey() { - $key = new RSA(); - $key->setPassword(\OC::$server->getConfig()->getSystemValue('secret', '')); - if (!$key->loadKey($this->privateKey)) { - // Should this exception rather than return null? - return null; - } - return $key; - } - - /** - * Throws an exception if the provided host name/address is invalid (cannot be resolved - * and is not an IPv4 address). - * - * @return true; never returns in case of a problem, this return value is used just to - * make unit tests happy. - */ - public function assertHostAddressValid($hostname) { - // TODO: Should handle IPv6 addresses too - if (!preg_match('/^\d+\.\d+\.\d+\.\d+$/', $hostname) && gethostbyname($hostname) === $hostname) { - // Hostname is not an IPv4 address and cannot be resolved via DNS - throw new \InvalidArgumentException('Cannot resolve hostname.'); - } - return true; - } - - /** - * Throws an exception if the provided port number is invalid (cannot be resolved - * and is not an IPv4 address). - * - * @return true; never returns in case of a problem, this return value is used just to - * make unit tests happy. - */ - public function assertPortNumberValid($port) { - if (!preg_match('/^\d+$/', $port)) { - throw new \InvalidArgumentException('Port number must be a number.'); - } - if ($port < 0 || $port > 65535) { - throw new \InvalidArgumentException('Port number must be between 0 and 65535 inclusive.'); - } - return true; - } - - /** - * Replaces anything that's not an alphanumeric character or "." in a hostname - * with "_", to make it safe for use as part of a file name. - */ - protected function sanitizeHostName($name) { - return preg_replace('/[^\d\w\._]/', '_', $name); - } - - /** - * Replaces anything that's not an alphanumeric character or "_" in a username - * with "_", to make it safe for use as part of a file name. - */ - protected function sanitizeUserName($name) { - return preg_replace('/[^\d\w_]/', '_', $name); - } - - public function test() { - - // FIXME: Use as expression in empty once PHP 5.4 support is dropped - $host = $this->getHost(); - if (empty($host)) { - \OC::$server->getLogger()->warning('Hostname has not been specified'); - return false; - } - // FIXME: Use as expression in empty once PHP 5.4 support is dropped - $user = $this->getUser(); - if (empty($user)) { - \OC::$server->getLogger()->warning('Username has not been specified'); - return false; - } - if (!isset($this->privateKey)) { - \OC::$server->getLogger()->warning('Private key was missing from the request'); - return false; - } - - // Sanity check the host - $hostParts = explode(':', $this->getHost()); - try { - if (count($hostParts) == 1) { - $hostname = $hostParts[0]; - $this->assertHostAddressValid($hostname); - } else if (count($hostParts) == 2) { - $hostname = $hostParts[0]; - $this->assertHostAddressValid($hostname); - $this->assertPortNumberValid($hostParts[1]); - } else { - throw new \Exception('Host connection string is invalid.'); - } - } catch(\Exception $e) { - \OC::$server->getLogger()->warning($e->getMessage()); - return false; - } - - // Validate the key - $key = $this->getPrivateKey(); - if (is_null($key)) { - \OC::$server->getLogger()->warning('Secret key could not be loaded'); - return false; - } - - try { - if ($this->getConnection()->nlist() === false) { - return false; - } - } catch(\Exception $e) { - // We should be throwing a more specific error, so we're not just catching - // Exception here - \OC::$server->getLogger()->warning($e->getMessage()); - return false; - } - - // Save the key somewhere it can easily be extracted later - if (\OC::$server->getUserSession()->getUser()) { - $view = new \OC\Files\View('/'.\OC::$server->getUserSession()->getUser()->getUId().'/files_external/sftp_keys'); - if (!$view->is_dir('')) { - if (!$view->mkdir('')) { - \OC::$server->getLogger()->warning('Could not create secret key directory.'); - return false; - } - } - $key_filename = $this->sanitizeUserName($this->getUser()).'@'.$this->sanitizeHostName($hostname).'.pub'; - $key_file = $view->fopen($key_filename, "w"); - if ($key_file) { - fwrite($key_file, $this->publicKey); - fclose($key_file); - } else { - \OC::$server->getLogger()->warning('Could not write secret key file.'); - } - } - - return true; - } -}