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files_encryption: Fix getFileSize() 

For certain file sizes, we rounded to the wrong chunk number
and the returned bogus results. This should fix
https://github.com/owncloud/mirall/issues/1009

Conflicts:
	apps/files_encryption/tests/util.php
This commit is contained in:
Markus Goetz 2013-10-05 18:00:46 +02:00 committed by Bjoern Schiessle
parent 959b0f9125
commit af58360434
2 changed files with 38 additions and 3 deletions
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11
apps/files_encryption/lib/util.php
View File

@ -508,11 +508,18 @@ class Util {
) {
// get the size from filesystem
$fullPath = $this->view->getLocalFile($path);
$size = $this->view->filesize($path);
// fast path, else the calculation for $lastChunkNr is bogus
if ($size === 0) {
\OC_FileProxy::$enabled = $proxyStatus;
return 0;
}
// calculate last chunk nr
$lastChunkNr = floor($size / 8192);
// next highest is end of chunks, one subtracted is last one
// we have to read the last chunk, we can't just calculate it (because of padding etc)
$lastChunkNr = ceil($size/ 8192) - 1;
$lastChunkSize = $size - ($lastChunkNr * 8192);
// open stream

30
apps/files_encryption/tests/util.php
View File

@ -241,6 +241,34 @@ class Test_Encryption_Util extends \PHPUnit_Framework_TestCase {
$this->view->unlink($this->userId . '/files/' . $filename);
}
/**
< * @brief Test that data that is read by the crypto stream wrapper
*/
function testGetFileSize() {
\Test_Encryption_Util::loginHelper(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_USER1);
$filename = 'tmp-' . time();
$externalFilename = '/' . $this->userId . '/files/' . $filename;
// Test for 0 byte files
$problematicFileSizeData = "";
$cryptedFile = $this->view->file_put_contents($externalFilename, $problematicFileSizeData);
$this->assertTrue(is_int($cryptedFile));
$this->assertEquals($this->util->getFileSize($externalFilename), 0);
$decrypt = $this->view->file_get_contents($externalFilename);
$this->assertEquals($problematicFileSizeData, $decrypt);
$this->view->unlink($this->userId . '/files/' . $filename);
// Test a file with 18377 bytes as in https://github.com/owncloud/mirall/issues/1009
$problematicFileSizeData = str_pad("", 18377, "abc");
$cryptedFile = $this->view->file_put_contents($externalFilename, $problematicFileSizeData);
$this->assertTrue(is_int($cryptedFile));
$this->assertEquals($this->util->getFileSize($externalFilename), 18377);
$decrypt = $this->view->file_get_contents($externalFilename);
$this->assertEquals($problematicFileSizeData, $decrypt);
$this->view->unlink($this->userId . '/files/' . $filename);
}
/**
* @medium
*/
@ -333,7 +361,7 @@ class Test_Encryption_Util extends \PHPUnit_Framework_TestCase {
/**
* helper function to set migration status to the right value
* to be able to test the migration path
*
*
* @param $status needed migration status for test
* @param $user for which user the status should be set
* @return boolean