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cache keys to read them only once from the hard disc

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This commit is contained in:
Bjoern Schiessle 2014-12-19 11:32:02 +01:00
parent 10a0fc2856
commit aea991c22e
4 changed files with 91 additions and 19 deletions
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56
apps/files_encryption/lib/keymanager.php
View file

@ -35,6 +35,8 @@ class Keymanager {
private static $encryption_base_dir = '/files_encryption';
private static $public_key_dir = '/files_encryption/public_keys';
private static $key_cache = array(); // cache keys
/**
* read key from hard disk
*
@ -42,15 +44,24 @@ class Keymanager {
* @return string|bool either the key or false
*/
private static function getKey($path, $view) {
$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
$key = false;
if ($view->file_exists($path)) {
$key = $view->file_get_contents($path);
}
\OC_FileProxy::$enabled = $proxyStatus;
if (isset(self::$key_cache[$path])) {
$key = self::$key_cache[$path];
} else {
$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
if ($view->file_exists($path)) {
$key = $view->file_get_contents($path);
self::$key_cache[$path] = $key;
}
\OC_FileProxy::$enabled = $proxyStatus;
}
return $key;
}
@ -70,11 +81,17 @@ class Keymanager {
\OC_FileProxy::$enabled = false;
self::keySetPreparation($view, $path);
$result = $view->file_put_contents($path . '/' . $name, $key);
$pathToKey = \OC\Files\Filesystem::normalizePath($path . '/' . $name);
$result = $view->file_put_contents($pathToKey, $key);
\OC_FileProxy::$enabled = $proxyStatus;
return (is_int($result) && $result > 0) ? true : false;
if (is_int($result) && $result > 0) {
self::$key_cache[$pathToKey] = $key;
return true;
}
return false;
}
/**
@ -209,6 +226,25 @@ class Keymanager {
return $keyDir . $uid . '.shareKey';
}
/**
* delete key
*
* @param \OC\Files\View $view
* @param string $path
* @return boolean
*/
private static function deleteKey($view, $path) {
$normalizedPath = \OC\Files\Filesystem::normalizePath($path);
$result = $view->unlink($normalizedPath);
if ($result) {
unset(self::$key_cache[$normalizedPath]);
return true;
}
return false;
}
/**
* delete public key from a given user
*
@ -222,7 +258,7 @@ class Keymanager {
if (!\OCP\User::userExists($uid)) {
$publicKey = self::$public_key_dir . '/' . $uid . '.publicKey';
$result = $view->unlink($publicKey);
self::deleteKey($view, $publicKey);
}
return $result;
@ -426,7 +462,7 @@ class Keymanager {
foreach ($userIds as $userId) {
if ($userId . '.shareKey' === $file) {
\OCP\Util::writeLog('files_encryption', 'recursiveDelShareKey: delete share key: ' . $file, \OCP\Util::DEBUG);
$view->unlink($dir . '/' . $file);
self::deleteKey($view, $dir . '/' . $file);
}
}
}

37
apps/files_encryption/tests/keymanager.php
View file

@ -84,6 +84,24 @@ class Keymanager extends TestCase {
parent::tearDownAfterClass();
}
function testKeyCacheUpdate() {
$testUser = 'testKeyCacheUpdate';
\OCA\Files_Encryption\Keymanager::setPublicKey('oldKey', $testUser);
$this->assertSame('oldKey',
\OCA\Files_Encryption\Keymanager::getPublicKey($this->view, $testUser));
// update key
\OCA\Files_Encryption\Keymanager::setPublicKey('newKey', $testUser);
$this->assertSame('newKey',
\OCA\Files_Encryption\Keymanager::getPublicKey($this->view, $testUser));
// cleanup
\OCA\Files_Encryption\Keymanager::deletePublicKey($this->view, $testUser);
}
/**
* @medium
*/
@ -306,13 +324,14 @@ class Keymanager extends TestCase {
$this->view->file_put_contents('/' . self::TEST_USER . '/files/folder1/existingFile.txt', 'data');
// create folder structure for some dummy share key files
$this->view->mkdir('/' . self::TEST_USER . '/files_encryption/share-keys/folder1');
$this->view->mkdir('/' . self::TEST_USER . '/files_encryption/keys/folder1');
$this->view->mkdir('/' . self::TEST_USER . '/files_encryption/keys/folder1/existingFile.txt');
// create some dummy share keys
$this->view->file_put_contents('/' . self::TEST_USER . '/files_encryption/share-keys/folder1/existingFile.txt.user1.shareKey', 'data');
$this->view->file_put_contents('/' . self::TEST_USER . '/files_encryption/share-keys/folder1/existingFile.txt.user2.shareKey', 'data');
$this->view->file_put_contents('/' . self::TEST_USER . '/files_encryption/share-keys/folder1/existingFile.txt.user3.shareKey', 'data');
$this->view->file_put_contents('/' . self::TEST_USER . '/files_encryption/share-keys/folder1/existingFile.txt.' . self::TEST_USER . '.shareKey', 'data');
$this->view->file_put_contents('/' . self::TEST_USER . '/files_encryption/keys/folder1/existingFile.txt/user1.shareKey', 'data');
$this->view->file_put_contents('/' . self::TEST_USER . '/files_encryption/keys/folder1/existingFile.txt/user2.shareKey', 'data');
$this->view->file_put_contents('/' . self::TEST_USER . '/files_encryption/keys/folder1/existingFile.txt/user3.shareKey', 'data');
$this->view->file_put_contents('/' . self::TEST_USER . '/files_encryption/keys/folder1/existingFile.txt/' . self::TEST_USER . '.shareKey', 'data');
// recursive delete share keys from user1 and user2
\OCA\Files_Encryption\Keymanager::delShareKey($this->view,
@ -324,15 +343,15 @@ class Keymanager extends TestCase {
// check if share keys from user1 and user2 are deleted
$this->assertFalse($this->view->file_exists(
'/' . self::TEST_USER . '/files_encryption/share-keys/folder1/existingFile.user1.shareKey'));
'/' . self::TEST_USER . '/files_encryption/keys/folder1/existingFile/user1.shareKey'));
$this->assertFalse($this->view->file_exists(
'/' . self::TEST_USER . '/files_encryption/share-keys/folder1/existingFile.user2.shareKey'));
'/' . self::TEST_USER . '/files_encryption/keys/folder1/existingFile/user2.shareKey'));
// check if share keys for user3 and owner
$this->assertTrue($this->view->file_exists(
'/' . self::TEST_USER . '/files_encryption/share-keys/folder1/existingFile.txt.' . self::TEST_USER . '.shareKey'));
'/' . self::TEST_USER . '/files_encryption/keys/folder1/existingFile.txt/' . self::TEST_USER . '.shareKey'));
$this->assertTrue($this->view->file_exists(
'/' . self::TEST_USER . '/files_encryption/share-keys/folder1/existingFile.txt.user3.shareKey'));
'/' . self::TEST_USER . '/files_encryption/keys/folder1/existingFile.txt/user3.shareKey'));
// cleanup
$this->view->deleteAll('/' . self::TEST_USER . '/files/folder1');

14
apps/files_encryption/tests/testcase.php
View file

@ -79,4 +79,18 @@ abstract class TestCase extends \Test\TestCase {
parent::tearDownAfterClass();
}
protected function tearDown() {
parent::tearDown();
$this->resetKeyCache();
}
protected function resetKeyCache() {
// reset key cache for every testrun
$keyCache = new \ReflectionProperty('\OCA\Files_Encryption\Keymanager', 'key_cache');
$keyCache->setAccessible(true);
$keyCache->setValue(array());
$keyCache->setAccessible(false);
}
}

3
apps/files_encryption/tests/util.php
View file

@ -445,6 +445,9 @@ class Util extends TestCase {
$this->view->rename($this->userId . '/files_encryption/keys/' . $file1 . '/fileKey',
$this->userId . '/files_encryption/keys/' . $file1 . '/fileKey.moved');
// need to reset key cache that we don't use the cached key
$this->resetKeyCache();
// decrypt all encrypted files
$result = $util->decryptAll();