124 lines
4.1 KiB
Java
124 lines
4.1 KiB
Java
/*
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* Copyright (C) 2010 Ryszard Wiśniewski <brut.alll@gmail.com>
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* Copyright (C) 2010 Connor Tumbleson <connor.tumbleson@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package brut.util;
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import brut.common.BrutException;
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import brut.common.InvalidUnknownFileException;
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import brut.common.RootUnknownFileException;
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import brut.common.TraversalUnknownFileException;
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import org.apache.commons.io.IOUtils;
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import java.io.*;
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import java.util.zip.CRC32;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipFile;
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import java.util.zip.ZipOutputStream;
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public class BrutIO {
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public static void copyAndClose(InputStream in, OutputStream out)
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throws IOException {
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try {
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IOUtils.copy(in, out);
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} finally {
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IOUtils.closeQuietly(in);
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IOUtils.closeQuietly(out);
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}
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}
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public static long recursiveModifiedTime(File[] files) {
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long modified = 0;
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for (File file : files) {
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long submodified = recursiveModifiedTime(file);
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if (submodified > modified) {
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modified = submodified;
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}
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}
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return modified;
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}
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public static long recursiveModifiedTime(File file) {
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long modified = file.lastModified();
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if (file.isDirectory()) {
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File[] subfiles = file.listFiles();
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for (File subfile : subfiles) {
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long submodified = recursiveModifiedTime(subfile);
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if (submodified > modified) {
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modified = submodified;
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}
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}
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}
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return modified;
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}
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public static CRC32 calculateCrc(InputStream input) throws IOException {
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CRC32 crc = new CRC32();
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int bytesRead;
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byte[] buffer = new byte[8192];
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while((bytesRead = input.read(buffer)) != -1) {
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crc.update(buffer, 0, bytesRead);
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}
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return crc;
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}
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public static String sanitizeFilepath(final File directory, final String entry) throws IOException, BrutException {
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if (entry.isEmpty()) {
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throw new InvalidUnknownFileException("Invalid Unknown File");
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}
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if (new File(entry).isAbsolute()) {
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throw new RootUnknownFileException("Absolute Unknown Files is not allowed");
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}
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final String canonicalDirPath = directory.getCanonicalPath() + File.separator;
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final String canonicalEntryPath = new File(directory, entry).getCanonicalPath();
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if (!canonicalEntryPath.startsWith(canonicalDirPath)) {
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throw new TraversalUnknownFileException("Directory Traversal is not allowed");
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}
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// https://stackoverflow.com/q/2375903/455008
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return canonicalEntryPath.substring(canonicalDirPath.length());
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}
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public static boolean detectPossibleDirectoryTraversal(String entry) {
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return entry.contains("../") || entry.contains("/..") || entry.contains("..\\") || entry.contains("\\..");
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}
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public static String adaptSeparatorToUnix(String path) {
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char separator = File.separatorChar;
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if (separator != '/') {
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return path.replace(separator, '/');
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}
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return path;
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}
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public static void copy(File inputFile, ZipOutputStream outputFile) throws IOException {
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try (FileInputStream fis = new FileInputStream(inputFile)) {
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IOUtils.copy(fis, outputFile);
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}
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}
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public static void copy(ZipFile inputFile, ZipOutputStream outputFile, ZipEntry entry) throws IOException {
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try (InputStream is = inputFile.getInputStream(entry)) {
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IOUtils.copy(is, outputFile);
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}
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}
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}
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