1b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato/* 2b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * ProGuard -- shrinking, optimization, obfuscation, and preverification 3b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * of Java bytecode. 4b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 5b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu) 6b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 7b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This program is free software; you can redistribute it and/or modify it 8b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * under the terms of the GNU General Public License as published by the Free 9b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Software Foundation; either version 2 of the License, or (at your option) 10b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * any later version. 11b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 12b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This program is distributed in the hope that it will be useful, but WITHOUT 13b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * more details. 16b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 17b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * You should have received a copy of the GNU General Public License along 18b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * with this program; if not, write to the Free Software Foundation, Inc., 19b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 21b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratopackage proguard; 22b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 23b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport java.io.*; 24b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport java.util.*; 25b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 26b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato/** 27b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This class checks and prints out information about the GPL. 28b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 29b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @author Eric Lafortune 30b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 31b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratopublic class GPL 32b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato{ 33b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato /** 34b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Prints out a note about the GPL if ProGuard is linked against unknown 35b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * code. 36b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 37b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public static void check() 38b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 39b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato ByteArrayOutputStream out = new ByteArrayOutputStream(); 40b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato new Exception().printStackTrace(new PrintStream(out)); 41b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato LineNumberReader reader = new LineNumberReader( 42b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato new InputStreamReader( 43b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato new ByteArrayInputStream(out.toByteArray()))); 44b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 45b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato Set unknownPackageNames = unknownPackageNames(reader); 46b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 47b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (unknownPackageNames.size() > 0) 48b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 49b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato String uniquePackageNames = uniquePackageNames(unknownPackageNames); 50b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 51b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato System.out.println("ProGuard is released under the GNU General Public License. The authors of all"); 52b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato System.out.println("programs or plugins that link to it ("+uniquePackageNames+"...) therefore"); 53b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato System.out.println("must ensure that these programs carry the GNU General Public License as well."); 54b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 55b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 56b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 57b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 58b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato /** 59b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Returns a set of package names from the given stack trace. 60b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 61b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private static Set unknownPackageNames(LineNumberReader reader) 62b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 63b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato Set packageNames = new HashSet(); 64b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 65b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato try 66b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 67b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato while (true) 68b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 69b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato String line = reader.readLine(); 70b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (line == null) 71b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 72b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato break; 73b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 74b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 75b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato line = line.trim(); 76b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (line.startsWith("at ")) 77b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 78b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato line = line.substring(2).trim(); 79b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato line = trimSuffix(line, '('); 80b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato line = trimSuffix(line, '.'); 81b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato line = trimSuffix(line, '.'); 82b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 83b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (line.length() > 0 && !isKnown(line)) 84b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 85b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato packageNames.add(line); 86b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 87b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 88b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 89b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 90b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato catch (IOException ex) 91b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 92b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // We'll just stop looking for more names. 93b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 94b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 95b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato return packageNames; 96b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 97b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 98b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 99b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato /** 100b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Returns a comma-separated list of package names from the set, excluding 101b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * any subpackages of packages in the set. 102b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 103b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private static String uniquePackageNames(Set packageNames) 104b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 105b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato StringBuffer buffer = new StringBuffer(); 106b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 107b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato Iterator iterator = packageNames.iterator(); 108b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato while (iterator.hasNext()) 109b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 110b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato String packageName = (String)iterator.next(); 111b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (!containsPrefix(packageNames, packageName)) 112b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 113b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato buffer.append(packageName).append(", "); 114b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 115b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 116b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 117b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato return buffer.toString(); 118b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 119b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 120b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 121b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato /** 122b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Returns a given string without the suffix, as defined by the given 123b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * separator. 124b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 125b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private static String trimSuffix(String string, char separator) 126b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 127b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato int index = string.lastIndexOf(separator); 128b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato return index < 0 ? "" : string.substring(0, index); 129b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 130b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 131b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 132b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato /** 133b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Returns whether the given set contains a prefix of the given name. 134b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 135b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private static boolean containsPrefix(Set set, String name) 136b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 137b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato int index = 0; 138b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 139b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato while (!set.contains(name.substring(0, index))) 140b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 141b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato index = name.indexOf('.', index + 1); 142b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (index < 0) 143b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 144b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato return false; 145b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 146b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 147b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 148b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato return true; 149b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 150b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 151b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 152b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato /** 153b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Returns whether the given package name has been granted an exception 154b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * against the GPL linking clause, by the copyright holder of ProGuard. 155b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This method is not legally binding, but of course the actual license is. 156b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Please contact the copyright holder if you would like an exception for 157b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * your code as well. 158b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 159b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private static boolean isKnown(String packageName) 160b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 161b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato return packageName.startsWith("java") || 162b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato packageName.startsWith("sun.reflect") || 163b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato packageName.startsWith("proguard") || 164b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato packageName.startsWith("org.apache.tools.ant") || 165b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato packageName.startsWith("org.apache.tools.maven") || 166b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato packageName.startsWith("org.eclipse") || 167b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato packageName.startsWith("org.netbeans") || 168b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato packageName.startsWith("com.sun.kvem") || 169b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato packageName.startsWith("net.certiv.proguarddt") || 170b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato packageName.startsWith("eclipseme") || 171b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato packageName.startsWith("jg.j2me") || 172b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato packageName.startsWith("jg.common") || 173b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato packageName.startsWith("jg.buildengine"); 174b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 175b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 176b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 177b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public static void main(String[] args) 178b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 179b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato LineNumberReader reader = new LineNumberReader( 180b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato new InputStreamReader(System.in)); 181b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 182b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato Set unknownPackageNames = unknownPackageNames(reader); 183b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 184b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (unknownPackageNames.size() > 0) 185b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 186b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato String uniquePackageNames = uniquePackageNames(unknownPackageNames); 187b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 188b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato System.out.println(uniquePackageNames); 189b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 190b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 191b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato} 192