/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.security;
import java.io.IOException;
import java.util.Random;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.fs.*;
import org.apache.hadoop.fs.permission.*;
import org.apache.hadoop.util.StringUtils;
import junit.framework.TestCase;
/** Unit tests for permission */
public class TestPermission extends TestCase {
public static final Log LOG = LogFactory.getLog(TestPermission.class);
final private static Path ROOT_PATH = new Path("/data");
final private static Path CHILD_DIR1 = new Path(ROOT_PATH, "child1");
final private static Path CHILD_DIR2 = new Path(ROOT_PATH, "child2");
final private static Path CHILD_FILE1 = new Path(ROOT_PATH, "file1");
final private static Path CHILD_FILE2 = new Path(ROOT_PATH, "file2");
final private static int FILE_LEN = 100;
final private static Random RAN = new Random();
final private static String USER_NAME = "user" + RAN.nextInt();
final private static String[] GROUP_NAMES = {"group1", "group2"};
static FsPermission checkPermission(FileSystem fs,
String path, FsPermission expected) throws IOException {
FileStatus s = fs.getFileStatus(new Path(path));
LOG.info(s.getPath() + ": " + s.isDir() + " " + s.getPermission()
+ ":" + s.getOwner() + ":" + s.getGroup());
if (expected != null) {
assertEquals(expected, s.getPermission());
assertEquals(expected.toShort(), s.getPermission().toShort());
}
return s.getPermission();
}
/**
* Tests backward compatibility. Configuration can be
* either set with old param dfs.umask that takes decimal umasks
* or dfs.umaskmode that takes symbolic or octal umask.
*/
public void testBackwardCompatibility() {
// Test 1 - old configuration key with decimal
// umask value should be handled when set using
// FSPermission.setUMask() API
FsPermission perm = new FsPermission((short)18);
Configuration conf = new Configuration();
FsPermission.setUMask(conf, perm);
assertEquals(18, FsPermission.getUMask(conf).toShort());
// Test 2 - old configuration key set with decimal
// umask value should be handled
perm = new FsPermission((short)18);
conf = new Configuration();
conf.set(FsPermission.DEPRECATED_UMASK_LABEL, "18");
assertEquals(18, FsPermission.getUMask(conf).toShort());
// Test 3 - old configuration key overrides the new one
conf = new Configuration();
conf.set(FsPermission.DEPRECATED_UMASK_LABEL, "18");
conf.set(FsPermission.UMASK_LABEL, "000");
assertEquals(18, FsPermission.getUMask(conf).toShort());
// Test 4 - new configuration key is handled
conf = new Configuration();
conf.set(FsPermission.UMASK_LABEL, "022");
assertEquals(18, FsPermission.getUMask(conf).toShort());
}
public void testCreate() throws Exception {
Configuration conf = new Configuration();
conf.setBoolean("dfs.permissions", true);
conf.set(FsPermission.UMASK_LABEL, "000");
MiniDFSCluster cluster = null;
FileSystem fs = null;
try {
cluster = new MiniDFSCluster(conf, 3, true, null);
cluster.waitActive();
fs = FileSystem.get(conf);
FsPermission rootPerm = checkPermission(fs, "/", null);
FsPermission inheritPerm = FsPermission.createImmutable(
(short)(rootPerm.toShort() | 0300));
FsPermission dirPerm = new FsPermission((short)0777);
fs.mkdirs(new Path("/a1/a2/a3"), dirPerm);
checkPermission(fs, "/a1", inheritPerm);
checkPermission(fs, "/a1/a2", inheritPerm);
checkPermission(fs, "/a1/a2/a3", dirPerm);
FsPermission filePerm = new FsPermission((short)0444);
FSDataOutputStream out = fs.create(new Path("/b1/b2/b3.txt"), filePerm,
true, conf.getInt("io.file.buffer.size", 4096),
fs.getDefaultReplication(), fs.getDefaultBlockSize(), null);
out.write(123);
out.close();
checkPermission(fs, "/b1", inheritPerm);
checkPermission(fs, "/b1/b2", inheritPerm);
checkPermission(fs, "/b1/b2/b3.txt", filePerm);
conf.set(FsPermission.UMASK_LABEL, "022");
FsPermission permission =
FsPermission.createImmutable((short)0666);
FileSystem.mkdirs(fs, new Path("/c1"), new FsPermission(permission));
FileSystem.create(fs, new Path("/c1/c2.txt"),
new FsPermission(permission));
checkPermission(fs, "/c1", permission);
checkPermission(fs, "/c1/c2.txt", permission);
} finally {
try {
if(fs != null) fs.close();
} catch(Exception e) {
LOG.error(StringUtils.stringifyException(e));
}
try {
if(cluster != null) cluster.shutdown();
} catch(Exception e) {
LOG.error(StringUtils.stringifyException(e));
}
}
}
public void testFilePermision() throws Exception {
final Configuration conf = new Configuration();
conf.setBoolean("dfs.permissions", true);
MiniDFSCluster cluster = new MiniDFSCluster(conf, 3, true, null);
cluster.waitActive();
try {
FileSystem nnfs = FileSystem.get(conf);
// test permissions on files that do not exist
assertFalse(nnfs.exists(CHILD_FILE1));
try {
nnfs.setOwner(CHILD_FILE1, "foo", "bar");
assertTrue(false);
}
catch(java.io.FileNotFoundException e) {
LOG.info("GOOD: got " + e);
}
try {
nnfs.setPermission(CHILD_FILE1, new FsPermission((short)0777));
assertTrue(false);
}
catch(java.io.FileNotFoundException e) {
LOG.info("GOOD: got " + e);
}
// following dir/file creations are legal
nnfs.mkdirs(CHILD_DIR1);
FSDataOutputStream out = nnfs.create(CHILD_FILE1);
byte data[] = new byte[FILE_LEN];
RAN.nextBytes(data);
out.write(data);
out.close();
nnfs.setPermission(CHILD_FILE1, new FsPermission("700"));
// following read is legal
byte dataIn[] = new byte[FILE_LEN];
FSDataInputStream fin = nnfs.open(CHILD_FILE1);
int bytesRead = fin.read(dataIn);
assertTrue(bytesRead == FILE_LEN);
for(int i=0; i<FILE_LEN; i++) {
assertEquals(data[i], dataIn[i]);
}
////////////////////////////////////////////////////////////////
// test illegal file/dir creation
UserGroupInformation userGroupInfo =
UserGroupInformation.createUserForTesting(USER_NAME, GROUP_NAMES );
FileSystem userfs = DFSTestUtil.getFileSystemAs(userGroupInfo, conf);
// make sure mkdir of a existing directory that is not owned by
// this user does not throw an exception.
userfs.mkdirs(CHILD_DIR1);
// illegal mkdir
assertTrue(!canMkdirs(userfs, CHILD_DIR2));
// illegal file creation
assertTrue(!canCreate(userfs, CHILD_FILE2));
// illegal file open
assertTrue(!canOpen(userfs, CHILD_FILE1));
nnfs.setPermission(ROOT_PATH, new FsPermission((short)0755));
nnfs.setPermission(CHILD_DIR1, new FsPermission("777"));
nnfs.setPermission(new Path("/"), new FsPermission((short)0777));
final Path RENAME_PATH = new Path("/foo/bar");
userfs.mkdirs(RENAME_PATH);
assertTrue(canRename(userfs, RENAME_PATH, CHILD_DIR1));
} finally {
if(cluster != null) cluster.shutdown();
}
}
static boolean canMkdirs(FileSystem fs, Path p) throws IOException {
try {
fs.mkdirs(p);
return true;
} catch(AccessControlException e) {
return false;
}
}
static boolean canCreate(FileSystem fs, Path p) throws IOException {
try {
fs.create(p);
return true;
} catch(AccessControlException e) {
return false;
}
}
static boolean canOpen(FileSystem fs, Path p) throws IOException {
try {
fs.open(p);
return true;
} catch(AccessControlException e) {
return false;
}
}
static boolean canRename(FileSystem fs, Path src, Path dst
) throws IOException {
try {
fs.rename(src, dst);
return true;
} catch(AccessControlException e) {
return false;
}
}
}