1 files changed, 322 insertions, 324 deletions
diff --git a/apps/files_encryption/lib/keymanager.php b/apps/files_encryption/lib/keymanager.php
index 43af70dacc2..95587797154 100755
--- a/apps/files_encryption/lib/keymanager.php
+++ b/apps/files_encryption/lib/keymanager.php
@@ -1,325 +1,323 @@
-<?php
-
-/**
- * ownCloud
- *
- * @author Bjoern Schiessle
- * @copyright 2012 Bjoern Schiessle <schiessle@owncloud.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or any later version.
- *
- * This library 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 along with this library.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-namespace OCA\Encryption;
-
-/**
- * @brief Class to manage storage and retrieval of encryption keys
- * @note Where a method requires a view object, it's root must be '/'
- */
-class Keymanager {
-		
-	/**
-	 * @brief retrieve the ENCRYPTED private key from a user
-	 * 
-	 * @return string private key or false
-	 * @note the key returned by this method must be decrypted before use
-	 */
-	public static function getPrivateKey( \OC_FilesystemView $view, $user ) {
-	
-		$path =  '/' . $user . '/' . 'files_encryption' . '/' . $user.'.private.key';
-		
-		$key = $view->file_get_contents( $path );
-		
-		return $key;
-	}
-
-	/**
-	 * @brief retrieve public key for a specified user
-	 * @return string public key or false
-	 */
-	public static function getPublicKey( \OC_FilesystemView $view, $userId ) {
-		
-		return $view->file_get_contents( '/public-keys/' . '/' . $userId . '.public.key' );
-		
-	}
-	
-	/**
-	 * @brief retrieve both keys from a user (private and public)
-	 * @return array keys: privateKey, publicKey
-	 */
-	public static function getUserKeys( \OC_FilesystemView $view, $userId ) {
-	
-		return array(
-			'publicKey' => self::getPublicKey( $view, $userId )
-			, 'privateKey' => self::getPrivateKey( $view, $userId )
-		);
-	
-	}
-	
-	/**
-	 * @brief Retrieve public keys of all users with access to a file
-	 * @param string $path Path to file
-	 * @return array of public keys for the given file
-	 * @note Checks that the sharing app is enabled should be performed 
-	 * by client code, that isn't checked here
-	 */
-	public static function getPublicKeys( \OC_FilesystemView $view, $userId, $filePath ) {
-		
-		$path = ltrim( $path, '/' );
-		
-		$filepath = '/' . $userId . '/files/' . $filePath;
-		
-		// Check if sharing is enabled
-		if ( OC_App::isEnabled( 'files_sharing' ) ) {
-			
-
-		
-		} else {
-		
-			// check if it is a file owned by the user and not shared at all
-			$userview = new \OC_FilesystemView( '/'.$userId.'/files/' );
-			
-			if ( $userview->file_exists( $path ) ) {
-			
-				$users[] = $userId;
-				
-			}
-			
-		}
-		
-		$view = new \OC_FilesystemView( '/public-keys/' );
-		
-		$keylist = array();
-		
-		$count = 0;
-		
-		foreach ( $users as $user ) {
-		
-			$keylist['key'.++$count] = $view->file_get_contents( $user.'.public.key' );
-			
-		}
-		
-		return $keylist;
-		
-	}
-	
-	/**
-	 * @brief store file encryption key
-	 *
-	 * @param string $path relative path of the file, including filename
-	 * @param string $key
-	 * @return bool true/false
-	 * @note The keyfile is not encrypted here. Client code must 
-	 * asymmetrically encrypt the keyfile before passing it to this method
-	 */
-	public static function setFileKey( \OC_FilesystemView $view, $path, $userId, $catfile ) {
-		
-		$basePath = '/' . $userId . '/files_encryption/keyfiles';
-		
-		$targetPath = self::keySetPreparation( $view, $path, $basePath, $userId );
-		
-		if ( $view->is_dir( $basePath . '/' . $targetPath ) ) {
-		
-			
-		
-		} else {
-
-			// Save the keyfile in parallel directory
-			return $view->file_put_contents( $basePath . '/' . $targetPath . '.key', $catfile );
-		
-		}
-		
-	}
-	
-	/**
-	 * @brief retrieve keyfile for an encrypted file
-	 * @param string file name
-	 * @return string file key or false on failure
-	 * @note The keyfile returned is asymmetrically encrypted. Decryption
-	 * of the keyfile must be performed by client code
-	 */
-	public static function getFileKey( \OC_FilesystemView $view, $userId, $filePath ) {
-		
-		$filePath_f = ltrim( $filePath, '/' );
-		
-		$catfilePath = '/' . $userId . '/files_encryption/keyfiles/' . $filePath_f . '.key';
-		
-		if ( $view->file_exists( $catfilePath ) ) {
-
-			return $view->file_get_contents( $catfilePath );
-			
-		} else {
-		
-			return false;
-			
-		}
-		
-	}
-	
-	/**
-	 * @brief Delete a keyfile
-	 *
-	 * @param OC_FilesystemView $view
-	 * @param string $userId username
-	 * @param string $path path of the file the key belongs to
-	 * @return bool Outcome of unlink operation
-	 * @note $path must be relative to data/user/files. e.g. mydoc.txt NOT
-	 *       /data/admin/files/mydoc.txt
-	 */
-	public static function deleteFileKey( \OC_FilesystemView $view, $userId, $path ) {
-		
-		$trimmed = ltrim( $path, '/' );
-		$keyPath =  '/' . $userId . '/files_encryption/keyfiles/' . $trimmed . '.key';
-		
-		// Unlink doesn't tell us if file was deleted (not found returns
-		// true), so we perform our own test
-		if ( $view->file_exists( $keyPath ) ) {
-		
-			return $view->unlink( $keyPath );
-			
-		} else {
-			
-			\OC_Log::write( 'Encryption library', 'Could not delete keyfile; does not exist: "' . $keyPath, \OC_Log::ERROR );
-			
-			return false;
-			
-		}
-		
-	}
-	
-	/**
-	 * @brief store private key from the user
-	 * @param string key
-	 * @return bool
-	 * @note Encryption of the private key must be performed by client code
-	 * as no encryption takes place here
-	 */
-	public static function setPrivateKey( $key ) {
-		
-		$user = \OCP\User::getUser();
-		
-		$view = new \OC_FilesystemView( '/' . $user . '/files_encryption' );
-		
-		\OC_FileProxy::$enabled = false;
-		
-		if ( !$view->file_exists( '' ) ) $view->mkdir( '' );
-		
-		return $view->file_put_contents( $user . '.private.key', $key );
-		
-		\OC_FileProxy::$enabled = true;
-		
-	}
-	
-	/**
-	 * @brief store private keys from the user
-	 *
-	 * @param string privatekey
-	 * @param string publickey
-	 * @return bool true/false
-	 */
-	public static function setUserKeys($privatekey, $publickey) {
-	
-		return ( self::setPrivateKey( $privatekey ) && self::setPublicKey( $publickey ) );
-	
-	}
-	
-	/**
-	 * @brief store public key of the user
-	 *
-	 * @param string key
-	 * @return bool true/false
-	 */
-	public static function setPublicKey( $key ) {
-		
-		$view = new \OC_FilesystemView( '/public-keys' );
-		
-		\OC_FileProxy::$enabled = false;
-		
-		if ( !$view->file_exists( '' ) ) $view->mkdir( '' );
-		
-		return $view->file_put_contents( \OCP\User::getUser() . '.public.key', $key );
-		
-		\OC_FileProxy::$enabled = true;
-		
-	}
-	
-	/**
-	 * @note 'shareKey' is a more user-friendly name for env_key
-	 */
-	public static function setShareKey( \OC_FilesystemView $view, $path, $userId, $shareKey ) {
-		
-		$basePath = '/' . $userId . '/files_encryption/share-keys';
-		
-		$shareKeyPath = self::keySetPreparation( $view, $path, $basePath, $userId );
-		
-		return $view->file_put_contents( $basePath . '/' . $shareKeyPath . '.shareKey', $shareKey );
-		
-	}
-	
-	/**
-	 * @brief Make preparations to vars and filesystem for saving a keyfile
-	 */
-	public static function keySetPreparation( \OC_FilesystemView $view, $path, $basePath, $userId ) {
-		
-		$targetPath = ltrim( $path, '/' );
-		
-		$path_parts = pathinfo( $targetPath );
-		
-		// If the file resides within a subdirectory, create it
-		if ( 
-		isset( $path_parts['dirname'] )
-		&& ! $view->file_exists( $basePath . '/' . $path_parts['dirname'] ) 
-		) {
-		
-			$view->mkdir( $basePath . '/' . $path_parts['dirname'] );
-			
-		}
-		
-		return $targetPath;
-	
-	}
-	
-	/**
-	 * @brief change password of private encryption key
-	 *
-	 * @param string $oldpasswd old password
-	 * @param string $newpasswd new password
-	 * @return bool true/false
-	 */
-	public static function changePasswd($oldpasswd, $newpasswd) {
-		
-		if ( \OCP\User::checkPassword(\OCP\User::getUser(), $newpasswd) ) {
-			return Crypt::changekeypasscode($oldpasswd, $newpasswd);
-		}
-		return false;
-		
-	}
-	
-	/**
-	 * @brief Fetch the legacy encryption key from user files
-	 * @param string $login used to locate the legacy key
-	 * @param string $passphrase used to decrypt the legacy key
-	 * @return true / false
-	 *
-	 * if the key is left out, the default handeler will be used
-	 */
-	public function getLegacyKey() {
-		
-		$user = \OCP\User::getUser();
-		$view = new \OC_FilesystemView( '/' . $user );
-		return $view->file_get_contents( 'encryption.key' );
-		
-	}
-	
+<?php
+
+/**
+ * ownCloud
+ *
+ * @author Bjoern Schiessle
+ * @copyright 2012 Bjoern Schiessle <schiessle@owncloud.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library 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 along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\Encryption;
+
+/**
+ * @brief Class to manage storage and retrieval of encryption keys
+ * @note Where a method requires a view object, it's root must be '/'
+ */
+class Keymanager {
+		
+	/**
+	 * @brief retrieve the ENCRYPTED private key from a user
+	 * 
+	 * @return string private key or false
+	 * @note the key returned by this method must be decrypted before use
+	 */
+	public static function getPrivateKey( \OC_FilesystemView $view, $user ) {
+	
+		$path =  '/' . $user . '/' . 'files_encryption' . '/' . $user.'.private.key';
+		
+		$key = $view->file_get_contents( $path );
+		
+		return $key;
+	}
+
+	/**
+	 * @brief retrieve public key for a specified user
+	 * @param \OC_FilesystemView $view
+	 * @param $userId
+	 * @return string public key or false
+	 */
+	public static function getPublicKey( \OC_FilesystemView $view, $userId ) {
+		
+		return $view->file_get_contents( '/public-keys/' . '/' . $userId . '.public.key' );
+		
+	}
+	
+	/**
+	 * @brief retrieve both keys from a user (private and public)
+	 * @param \OC_FilesystemView $view
+	 * @param $userId
+	 * @return array keys: privateKey, publicKey
+	 */
+	public static function getUserKeys( \OC_FilesystemView $view, $userId ) {
+	
+		return array(
+			'publicKey' => self::getPublicKey( $view, $userId )
+			, 'privateKey' => self::getPrivateKey( $view, $userId )
+		);
+	
+	}
+	
+	/**
+	 * @brief Retrieve public keys of all users with access to a file
+	 * @param string $path Path to file
+	 * @return array of public keys for the given file
+	 * @note Checks that the sharing app is enabled should be performed 
+	 * by client code, that isn't checked here
+	 */
+	public static function getPublicKeys( \OC_FilesystemView $view, $userId, $filePath ) {
+		
+		$path = ltrim( $path, '/' );
+		
+		$filepath = '/' . $userId . '/files/' . $filePath;
+		
+		// Check if sharing is enabled
+		if ( OC_App::isEnabled( 'files_sharing' ) ) {
+			
+
+		
+		} else {
+		
+			// check if it is a file owned by the user and not shared at all
+			$userview = new \OC_FilesystemView( '/'.$userId.'/files/' );
+			
+			if ( $userview->file_exists( $path ) ) {
+			
+				$users[] = $userId;
+				
+			}
+			
+		}
+		
+		$view = new \OC_FilesystemView( '/public-keys/' );
+		
+		$keylist = array();
+		
+		$count = 0;
+		
+		foreach ( $users as $user ) {
+		
+			$keylist['key'.++$count] = $view->file_get_contents( $user.'.public.key' );
+			
+		}
+		
+		return $keylist;
+		
+	}
+	
+	/**
+	 * @brief store file encryption key
+	 *
+	 * @param string $path relative path of the file, including filename
+	 * @param string $key
+	 * @return bool true/false
+	 * @note The keyfile is not encrypted here. Client code must 
+	 * asymmetrically encrypt the keyfile before passing it to this method
+	 */
+	public static function setFileKey( \OC_FilesystemView $view, $path, $userId, $catfile ) {
+		
+		$basePath = '/' . $userId . '/files_encryption/keyfiles';
+		
+		$targetPath = self::keySetPreparation( $view, $path, $basePath, $userId );
+		
+		if ( $view->is_dir( $basePath . '/' . $targetPath ) ) {
+		
+			
+		
+		} else {
+
+			// Save the keyfile in parallel directory
+			return $view->file_put_contents( $basePath . '/' . $targetPath . '.key', $catfile );
+		
+		}
+		
+	}
+	
+	/**
+	 * @brief retrieve keyfile for an encrypted file
+	 * @param \OC_FilesystemView $view
+	 * @param $userId
+	 * @param $filePath
+	 * @internal param \OCA\Encryption\file $string name
+	 * @return string file key or false
+	 * @note The keyfile returned is asymmetrically encrypted. Decryption
+	 * of the keyfile must be performed by client code
+	 */
+	public static function getFileKey( \OC_FilesystemView $view, $userId, $filePath ) {
+		
+		$filePath_f = ltrim( $filePath, '/' );
+		
+		$catfilePath = '/' . $userId . '/files_encryption/keyfiles/' . $filePath_f . '.key';
+		
+		if ( $view->file_exists( $catfilePath ) ) {
+
+			return $view->file_get_contents( $catfilePath );
+			
+		} else {
+		
+			return false;
+			
+		}
+		
+	}
+	
+	/**
+	 * @brief Delete a keyfile
+	 *
+	 * @param OC_FilesystemView $view
+	 * @param string $userId username
+	 * @param string $path path of the file the key belongs to
+	 * @return bool Outcome of unlink operation
+	 * @note $path must be relative to data/user/files. e.g. mydoc.txt NOT
+	 *       /data/admin/files/mydoc.txt
+	 */
+	public static function deleteFileKey( \OC_FilesystemView $view, $userId, $path ) {
+		
+		$trimmed = ltrim( $path, '/' );
+		$keyPath =  '/' . $userId . '/files_encryption/keyfiles/' . $trimmed . '.key';
+		
+		// Unlink doesn't tell us if file was deleted (not found returns
+		// true), so we perform our own test
+		if ( $view->file_exists( $keyPath ) ) {
+		
+			return $view->unlink( $keyPath );
+			
+		} else {
+			
+			\OC_Log::write( 'Encryption library', 'Could not delete keyfile; does not exist: "' . $keyPath, \OC_Log::ERROR );
+			
+			return false;
+			
+		}
+		
+	}
+	
+	/**
+	 * @brief store private key from the user
+	 * @param string key
+	 * @return bool
+	 * @note Encryption of the private key must be performed by client code
+	 * as no encryption takes place here
+	 */
+	public static function setPrivateKey( $key ) {
+		
+		$user = \OCP\User::getUser();
+		
+		$view = new \OC_FilesystemView( '/' . $user . '/files_encryption' );
+		
+		\OC_FileProxy::$enabled = false;
+		
+		if ( !$view->file_exists( '' ) )
+			$view->mkdir( '' );
+		
+		return $view->file_put_contents( $user . '.private.key', $key );
+
+	}
+	
+	/**
+	 * @brief store private keys from the user
+	 *
+	 * @param string privatekey
+	 * @param string publickey
+	 * @return bool true/false
+	 */
+	public static function setUserKeys($privatekey, $publickey) {
+	
+		return ( self::setPrivateKey( $privatekey ) && self::setPublicKey( $publickey ) );
+	
+	}
+	
+	/**
+	 * @brief store public key of the user
+	 *
+	 * @param string key
+	 * @return bool true/false
+	 */
+	public static function setPublicKey( $key ) {
+		
+		$view = new \OC_FilesystemView( '/public-keys' );
+		
+		\OC_FileProxy::$enabled = false;
+		
+		if ( !$view->file_exists( '' ) )
+			$view->mkdir( '' );
+		
+		return $view->file_put_contents( \OCP\User::getUser() . '.public.key', $key );
+
+		
+	}
+	
+	/**
+	 * @brief store file encryption key
+	 *
+	 * @param string $path relative path of the file, including filename
+	 * @param string $key
+	 * @param null $view
+	 * @param string $dbClassName
+	 * @return bool true/false
+	 * @note The keyfile is not encrypted here. Client code must
+	 * asymmetrically encrypt the keyfile before passing it to this method
+	 */
+	public static function setShareKey( \OC_FilesystemView $view, $path, $userId, $shareKey ) {
+		
+		$basePath = '/' . $userId . '/files_encryption/share-keys';
+		
+		$shareKeyPath = self::keySetPreparation( $view, $path, $basePath, $userId );
+		
+		return $view->file_put_contents( $basePath . '/' . $shareKeyPath . '.shareKey', $shareKey );
+		
+	}
+	
+	/**
+	 * @brief Make preparations to vars and filesystem for saving a keyfile
+	 */
+	public static function keySetPreparation( \OC_FilesystemView $view, $path, $basePath, $userId ) {
+		
+		$targetPath = ltrim( $path, '/' );
+		
+		$path_parts = pathinfo( $targetPath );
+		
+		// If the file resides within a subdirectory, create it
+		if ( 
+		isset( $path_parts['dirname'] )
+		&& ! $view->file_exists( $basePath . '/' . $path_parts['dirname'] ) 
+		) {
+		
+			$view->mkdir( $basePath . '/' . $path_parts['dirname'] );
+			
+		}
+		
+		return $targetPath;
+	
+	}
+
+	/**
+	 * @brief Fetch the legacy encryption key from user files
+	 * @param string $login used to locate the legacy key
+	 * @param string $passphrase used to decrypt the legacy key
+	 * @return true / false
+	 *
+	 * if the key is left out, the default handler will be used
+	 */
+	public function getLegacyKey() {
+		
+		$user = \OCP\User::getUser();
+		$view = new \OC_FilesystemView( '/' . $user );
+		return $view->file_get_contents( 'encryption.key' );
+		
+	}
+	
 }
 \ No newline at end of file