mirror of https://github.com/octoleo/plantuml.git
222 lines
6.2 KiB
Java
222 lines
6.2 KiB
Java
/* ========================================================================
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* PlantUML : a free UML diagram generator
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* ========================================================================
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*
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* (C) Copyright 2009-2017, Arnaud Roques
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*
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* Project Info: http://plantuml.com
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*
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* If you like this project or if you find it useful, you can support us at:
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*
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* http://plantuml.com/patreon (only 1$ per month!)
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* http://plantuml.com/paypal
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*
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* This file is part of PlantUML.
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*
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* PlantUML is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PlantUML distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*
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*
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* Original Author: Arnaud Roques
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*
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*/
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package net.sourceforge.plantuml.version;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileReader;
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import java.io.IOException;
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import java.math.BigInteger;
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import java.security.NoSuchAlgorithmException;
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import java.util.Collection;
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import java.util.Date;
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import java.util.Set;
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import java.util.TreeSet;
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import java.util.prefs.BackingStoreException;
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import java.util.prefs.Preferences;
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import net.sourceforge.plantuml.Log;
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import net.sourceforge.plantuml.SignatureUtils;
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import net.sourceforge.plantuml.dedication.Dedication;
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import net.sourceforge.plantuml.dedication.QBlock;
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public class LicenseInfo {
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private final static Preferences prefs = Preferences.userNodeForPackage(LicenseInfo.class);
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private final static LicenseInfo NONE = new LicenseInfo();
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public static final int POS_TYPE = 2;
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public static final int POS_SIGNATURE = 10;
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public static final int POS_GENERATION = 100;
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public static final int POS_EXPIRATION = 108;
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public static final int POS_OWNER = 128;
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private final long generationDate;
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private final long expirationDate;
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private final String owner;
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private LicenseInfo() {
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this.expirationDate = 0;
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this.generationDate = 0;
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this.owner = null;
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}
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private LicenseInfo(Magic magic) throws NoSuchAlgorithmException, IOException {
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final String signature = SignatureUtils.toHexString(magic.get(LicenseInfo.POS_SIGNATURE, 64));
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final String local = SignatureUtils.toHexString(Magic.signature());
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if (local.equals(signature) == false) {
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throw new IOException();
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}
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final int type = magic.getByte(Magic.signature(), LicenseInfo.POS_TYPE);
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this.generationDate = bytesToLong(magic.get(LicenseInfo.POS_GENERATION, 8));
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this.expirationDate = bytesToLong(magic.get(LicenseInfo.POS_EXPIRATION, 8));
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this.owner = magic.getString(LicenseInfo.POS_OWNER);
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}
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public static long bytesToLong(byte[] b) {
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long result = 0;
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for (int i = 0; i < 8; i++) {
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result <<= 8;
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result |= (b[i] & 0xFF);
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}
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return result;
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}
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public static void persistMe(String key) throws BackingStoreException {
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prefs.sync();
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prefs.put("license", key);
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}
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private static LicenseInfo cache;
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public static synchronized LicenseInfo retrieveQuick() {
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if (cache == null) {
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return retrieveSlow();
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}
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return cache;
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}
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public static synchronized LicenseInfo retrieveSlow() {
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cache = LicenseInfo.NONE;
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final String key = prefs.get("license", "");
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if (key.length() > 0) {
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cache = setIfValid(retrieve(key), cache);
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if (cache.isValid()) {
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return cache;
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}
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}
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for (File f : fileCandidates()) {
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try {
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if (f.exists() && f.canRead()) {
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final LicenseInfo result = retrieve(f);
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cache = setIfValid(result, cache);
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if (cache.isValid()) {
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return cache;
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}
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}
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} catch (IOException e) {
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Log.info("Error " + e);
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// e.printStackTrace();
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}
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}
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return cache;
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}
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private static LicenseInfo setIfValid(LicenseInfo value, LicenseInfo def) {
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if (value.isValid() || def.isNone()) {
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return value;
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}
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return def;
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}
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private static LicenseInfo retrieve(File f) throws IOException {
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final BufferedReader br = new BufferedReader(new FileReader(f));
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final String s = br.readLine();
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br.close();
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final LicenseInfo result = retrieve(s);
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if (result != null) {
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Log.info("Reading license from " + f.getAbsolutePath());
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}
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return result;
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}
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public static LicenseInfo retrieve(final String key) {
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if (key.matches("^[0-9a-z]+$")) {
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try {
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final BigInteger lu = new BigInteger(key, 36);
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final QBlock qb2 = new QBlock(lu);
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final QBlock qb3 = qb2.change(Dedication.E, Dedication.N);
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final Magic magic = qb3.toMagic();
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final String sig = SignatureUtils.toHexString(Magic.signature());
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magic.xor(SignatureUtils.getSHA512raw(SignatureUtils.salting(sig, Magic.getSalt(sig))));
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return new LicenseInfo(magic);
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} catch (Exception e) {
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// e.printStackTrace();
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Log.info("Error " + e);
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}
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}
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return LicenseInfo.NONE;
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}
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public static Collection<File> fileCandidates() {
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final Set<File> result = new TreeSet<File>();
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final String classpath = System.getProperty("java.class.path");
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String[] classpathEntries = classpath.split(File.pathSeparator);
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for (String s : classpathEntries) {
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File dir = new File(s);
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if (dir.isFile()) {
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dir = dir.getParentFile();
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}
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if (dir.isDirectory()) {
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result.add(new File(dir, "license.txt"));
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}
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}
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return result;
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}
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public static void main(String[] args) {
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LicenseInfo info = retrieveSlow();
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System.err.println("valid=" + info.isValid());
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System.err.println("info=" + info.owner);
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}
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public final Date getGenerationDate() {
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return new Date(generationDate);
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}
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public final Date getExpirationDate() {
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return new Date(expirationDate);
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}
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public final String getOwner() {
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return owner;
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}
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public boolean isNone() {
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return owner == null;
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}
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public boolean isValid() {
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return owner != null && System.currentTimeMillis() <= this.expirationDate;
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}
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public boolean hasExpired() {
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return owner != null && System.currentTimeMillis() > this.expirationDate;
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}
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}
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