fix for encryption binary files

apps/files_encryption/lib/crypt.php

@@ -43,22 +43,22 @@ class OC_Crypt {
 		self::init($params['uid'],$params['password']);
 	}
 
-       public static function init($login,$password) {      
-          $view1=new OC_FilesystemView('/');
-          if(!$view1->file_exists('/'.$login)){
-             $view1->mkdir('/'.$login);
-          }
+	public static function init($login,$password) {
+		$view1=new OC_FilesystemView('/');
+		if(!$view1->file_exists('/'.$login)){
+			$view1->mkdir('/'.$login);
+		}
 
-          $view=new OC_FilesystemView('/'.$login);      
+		$view=new OC_FilesystemView('/'.$login);
 
-          OC_FileProxy::$enabled=false;
-          if(!$view->file_exists('/encryption.key')){// does key exist?
-             OC_Crypt::createkey($login,$password);
-          }
-          $key=$view->file_get_contents('/encryption.key');
-          OC_FileProxy::$enabled=true;
-          $_SESSION['enckey']=OC_Crypt::decrypt($key, $password);
-       }
+		OC_FileProxy::$enabled=false;
+		if(!$view->file_exists('/encryption.key')){// does key exist?
+			OC_Crypt::createkey($login,$password);
+		}
+		$key=$view->file_get_contents('/encryption.key');
+		OC_FileProxy::$enabled=true;
+		$_SESSION['enckey']=OC_Crypt::decrypt($key, $password);
+	}
 
 
 	/**
@@ -140,7 +140,7 @@ class OC_Crypt {
 	public static function decrypt( $content, $key='') {
 		$bf = self::getBlowfish($key);
 		$data=$bf->decrypt($content);
-		return rtrim($data, "\0");
+		return $data;
 	}
 
 	/**
@@ -181,6 +181,9 @@ class OC_Crypt {
 			while (!feof($handleread)) {
 				$content = fread($handleread, 8192);
 				$enccontent=OC_CRYPT::decrypt( $content, $key);
+				if(feof($handleread)){
+					$enccontent=rtrim($enccontent, "\0");
+				}
 				fwrite($handlewrite, $enccontent);
 			}
 			fclose($handlewrite);
@@ -209,6 +212,6 @@ class OC_Crypt {
 			$result.=self::decrypt(substr($data,0,8192),$key);
 			$data=substr($data,8192);
 		}
-		return $result;
+		return rtrim($result, "\0");
 	}
 }

apps/files_encryption/lib/cryptstream.php

@@ -47,7 +47,6 @@ class OC_CryptStream{
 			$this->path=self::$sourceStreams[basename($path)]['path'];
 		}else{
 			$this->path=$path;
-			OCP\Util::writeLog('files_encryption','open encrypted '.$path. ' in '.$mode,OCP\Util::DEBUG);
 			OC_FileProxy::$enabled=false;//disable fileproxies so we can open the source file
 			$this->source=self::$rootView->fopen($path,$mode);
 			OC_FileProxy::$enabled=true;
@@ -84,6 +83,9 @@ class OC_CryptStream{
 		}else{
 			$result='';
 		}
+		if($this->stream_eof()){
+			$result=rtrim($result, "\0");
+		}
 		return $result;
 	}
 	

apps/files_encryption/tests/encryption.php

@@ -13,6 +13,7 @@ class Test_Encryption extends UnitTestCase {
 		$source=file_get_contents($file); //nice large text file
 		$encrypted=OC_Crypt::encrypt($source,$key);
 		$decrypted=OC_Crypt::decrypt($encrypted,$key);
+		$decrypted=rtrim($decrypted, "\0");
 		$this->assertNotEqual($encrypted,$source);
 		$this->assertEqual($decrypted,$source);
 
@@ -20,6 +21,7 @@ class Test_Encryption extends UnitTestCase {
 		$encrypted=OC_Crypt::encrypt($chunk,$key);
 		$this->assertEqual(strlen($chunk),strlen($encrypted));
 		$decrypted=OC_Crypt::decrypt($encrypted,$key);
+		$decrypted=rtrim($decrypted, "\0");
 		$this->assertEqual($decrypted,$chunk);
 		
 		$encrypted=OC_Crypt::blockEncrypt($source,$key);
@@ -43,6 +45,7 @@ class Test_Encryption extends UnitTestCase {
 		$source=file_get_contents($file); //binary file
 		$encrypted=OC_Crypt::encrypt($source,$key);
 		$decrypted=OC_Crypt::decrypt($encrypted,$key);
+		$decrypted=rtrim($decrypted, "\0");
 		$this->assertEqual($decrypted,$source);
 
 		$encrypted=OC_Crypt::blockEncrypt($source,$key);
@@ -50,4 +53,20 @@ class Test_Encryption extends UnitTestCase {
 		$this->assertEqual($decrypted,$source);
 
 	}
+
+	function testBinary(){
+		$key=uniqid();
+	
+		$file=__DIR__.'/binary';
+		$source=file_get_contents($file); //binary file
+		$encrypted=OC_Crypt::encrypt($source,$key);
+		$decrypted=OC_Crypt::decrypt($encrypted,$key);
+
+		$decrypted=rtrim($decrypted, "\0");
+		$this->assertEqual($decrypted,$source);
+
+		$encrypted=OC_Crypt::blockEncrypt($source,$key);
+		$decrypted=OC_Crypt::blockDecrypt($encrypted,$key);
+		$this->assertEqual($decrypted,$source);
+	}
 }

apps/files_encryption/tests/stream.php

@@ -50,7 +50,22 @@ class Test_CryptStream extends UnitTestCase {
 			$file=$this->tmpFiles[$id];
 		}
 		$stream=fopen($file,$mode);
-		OC_CryptStream::$sourceStreams[$id]=array('path'=>'dummy','stream'=>$stream);
+		OC_CryptStream::$sourceStreams[$id]=array('path'=>'dummy'.$id,'stream'=>$stream);
 		return fopen('crypt://streams/'.$id,$mode);
 	}
+
+	function testBinary(){
+		$file=__DIR__.'/binary';
+		$source=file_get_contents($file);
+
+		$stream=$this->getStream('test','w');
+		fwrite($stream,$source);
+		fclose($stream);
+
+		$stream=$this->getStream('test','r');
+		$data=stream_get_contents($stream);
+		fclose($stream);
+		$this->assertEqual(strlen($data),strlen($source));
+		$this->assertEqual($source,$data);
+	}
 }