javacc-7.0.1.test.tmp.Obfuscator.Obfuscator Maven / Gradle / Ivy
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JavaCC is a parser/scanner generator for Java.
/* Copyright (c) 2006, Sun Microsystems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Sun Microsystems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
import java.io.*;
import java.util.*;
public class Obfuscator extends Globals {
// These data structures implement a stack that is used to recursively
// walk the input directory structure looking for Java files.
static String[][] dirStack = new String[100][];
static int[] dirStackIndex = new int[100];
static int dirStackSize;
static File[] dirFile = new File[100];
static {
dirFile[0] = inpDir;
dirStackSize = 1;
dirStack[dirStackSize] = dirFile[dirStackSize-1].list();
dirStackIndex[dirStackSize] = 0;
}
// Returns true if this is a Java file.
static boolean javaFile(String name) {
if (name.length() < 6) {
return false;
}
if (name.substring(name.length() - 5).equals(".java")) {
return true;
}
return false;
}
// The iterator. This uses the above datastructures to walk the input
// directory tree. Everytime it finds a Java file or when it cannot find
// any more Java file, it returns to the caller.
static void nextJavaFile() {
while (true) {
if (dirStackIndex[dirStackSize] == dirStack[dirStackSize].length) {
dirStackSize--;
if (dirStackSize == 0) {
return;
} else {
dirStackIndex[dirStackSize]++;
}
} else {
dirFile[dirStackSize] = new File(dirFile[dirStackSize-1],
dirStack[dirStackSize][dirStackIndex[dirStackSize]]);
if (dirStack[dirStackSize][dirStackIndex[dirStackSize]].equals("SCCS")) {
dirStackIndex[dirStackSize]++;
} else if (dirFile[dirStackSize].isDirectory()) {
dirStackSize++;
dirStack[dirStackSize] = dirFile[dirStackSize-1].list();
dirStackIndex[dirStackSize] = 0;
} else if (javaFile(dirStack[dirStackSize][dirStackIndex[dirStackSize]])) {
dirStackIndex[dirStackSize]++;
return;
} else {
dirStackIndex[dirStackSize]++;
}
}
}
}
// The main Obfuscator routine. It calls the iterator for each Java file to
// work on. It then creates the output file, then parses the input Java file
// to determine whether or not it has a main program and also to collect the
// tokens that make up this file. It then calls printOutputFile that takes
// first token and walks the next field chain printing tokens as it goes along.
// Finally a main program is created if necessary.
static public void start() {
boolean parserInitialized = false;
JavaParser parser = null;
Token first;
while (true) {
nextJavaFile();
if (dirStackSize == 0) {
break;
}
createOutputFile();
System.out.println("Obfuscating " + dirFile[dirStackSize].getPath());
System.out.println(" into " + outFile.getPath());
try {
if (parserInitialized) {
parser.ReInit(new FileInputStream(dirFile[dirStackSize]));
} else {
parser = new JavaParser(new FileInputStream(dirFile[dirStackSize]));
parserInitialized = true;
}
first = parser.CompilationUnit(dirStack[dirStackSize][dirStackIndex[dirStackSize]-1]);
} catch (ParseException e1) {
System.out.println("Parse error in file " + dirFile[dirStackSize].getPath());
throw new Error();
} catch (IOException e2) {
System.out.println("Could not open file " + dirFile[dirStackSize].getPath());
throw new Error();
}
printOutputFile(first);
if (mainExists) {
createMainClass();
}
}
}
static File outFile;
static PrintWriter ostr;
static void createOutputFile() {
// sets outFile and ostr
outFile = outDir;
for (int i = 1; i < dirStackSize; i++) {
outFile = new File(outFile, map(dirStack[i][dirStackIndex[i]]));
if (outFile.exists()) {
if (!outFile.isDirectory()) {
System.out.println("Unexpected error!");
throw new Error();
}
} else {
if (!outFile.mkdir()) {
System.out.println("Could not create directory " + outFile.getPath());
throw new Error();
}
}
}
String origFileName = dirStack[dirStackSize][dirStackIndex[dirStackSize]-1];
String newFileName = map(origFileName.substring(0, origFileName.length() - 5)) + ".java";
outFile = new File(outFile, newFileName);
try {
ostr = new PrintWriter(new FileWriter(outFile));
} catch (IOException e) {
System.out.println("Could not create file " + outFile.getPath());
throw new Error();
}
}
static void printOutputFile(Token first) {
Token t = first;
for (int i = 1; i < t.beginColumn; i++) {
ostr.print(" ");
}
while (true) {
if (t.kind == JavaParserConstants.IDENTIFIER) {
t.image = map(t.image);
}
ostr.print(addUnicodeEscapes(t.image));
if (t.next == null) {
ostr.println("");
break;
}
if (t.endLine != t.next.beginLine) {
for (int i = t.endLine; i < t.next.beginLine; i++) {
ostr.println("");
}
for (int i = 1; i < t.next.beginColumn; i++) {
ostr.print(" ");
}
} else {
for (int i = t.endColumn+1; i < t.next.beginColumn; i++) {
ostr.print(" ");
}
}
t = t.next;
}
ostr.close();
}
static String addUnicodeEscapes(String str) {
String retval = "";
char ch;
for (int i = 0; i < str.length(); i++) {
ch = str.charAt(i);
if (ch < 0x20 || ch > 0x7e) {
String s = "0000" + Integer.toString(ch, 16);
retval += "\\u" + s.substring(s.length() - 4, s.length());
} else {
retval += ch;
}
}
return retval;
}
// This creates a main program if there was one in the original file. This
// main program has the same name and resides in the same package as the original
// file and it simply calls the obfuscated main program. This allows scripts
// to continue to work.
static void createMainClass() {
PrintWriter mstr;
boolean mustCreate = false;
File mFile = outDir;
for (int i = 1; i < dirStackSize; i++) {
mFile = new File(mFile, dirStack[i][dirStackIndex[i]]);
mustCreate = mustCreate || !map(dirStack[i][dirStackIndex[i]]).equals(dirStack[i][dirStackIndex[i]]);
if (mFile.exists()) {
if (!mFile.isDirectory()) {
System.out.println("Error: Created file " + mFile.getPath() + ", but need to create a main program with the same path prefix. Please remove identifiers from the path prefix from your and run again.");
throw new Error();
}
}
}
String origFileName = dirStack[dirStackSize][dirStackIndex[dirStackSize]-1];
String newFileName = map(origFileName.substring(0, origFileName.length() - 5)) + ".java";
if (!mustCreate && origFileName.equals(newFileName)) {
return; // this main program has not been obfuscated.
}
if (!mFile.exists() && !mFile.mkdirs()) {
System.out.println("Could not create " + mFile.getPath());
throw new Error();
}
mFile = new File(mFile, origFileName);
try {
mstr = new PrintWriter(new FileWriter(mFile));
} catch (IOException e) {
System.out.println("Could not create " + mFile.getPath());
throw new Error();
}
System.out.print("Generating main program ");
String pname = "";
if (dirStackSize > 1) {
for (int i = 1; i < dirStackSize; i++) {
pname += "." + dirStack[i][dirStackIndex[i]];
}
mstr.println("package " + pname.substring(1) + ";");
System.out.print(pname.substring(1) + ".");
mstr.println("");
}
System.out.println(origFileName.substring(0, origFileName.length() - 5));
mstr.println("public class " + origFileName.substring(0, origFileName.length() - 5) + " {");
mstr.println("");
mstr.println(" public static void main(String[] args) {");
pname = "";
for (int i = 1; i < dirStackSize; i++) {
pname += map(dirStack[i][dirStackIndex[i]]) + ".";
}
mstr.println(" " + pname + map(origFileName.substring(0, origFileName.length() - 5)) + ".main(args);");
mstr.println(" }");
mstr.println("");
mstr.println("}");
mstr.close();
}
}