/**
* Copyright 2011 Ryszard Wiśniewski <brut.alll@gmail.com>
*
* Licensed 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 brut.androlib.mod;
import brut.androlib.src.TypeName;
import java.io.*;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jf.baksmali.Adaptors.ClassDefinition;
import org.jf.baksmali.baksmali;
import org.jf.baksmali.fileNameHandler;
import org.jf.dexlib.ClassDefItem;
import org.jf.dexlib.Code.Analysis.ClassPath;
import org.jf.dexlib.DexFile;
/**
* @author Ryszard Wiśniewski <brut.alll@gmail.com>
*/
public class BaksmaliMod {
public static void disassembleDexFile(boolean debug, String dexFilePath, DexFile dexFile, boolean deodex, String outputDirectory,
String[] classPathDirs, String bootClassPath, String extraBootClassPath,
boolean noParameterRegisters, boolean useLocalsDirective,
boolean useSequentialLabels, boolean outputDebugInfo, boolean addCodeOffsets,
int registerInfo, boolean verify, boolean ignoreErrors)
{
baksmali.noParameterRegisters = noParameterRegisters;
baksmali.useLocalsDirective = useLocalsDirective;
baksmali.useSequentialLabels = useSequentialLabels;
baksmali.outputDebugInfo = outputDebugInfo;
baksmali.addCodeOffsets = addCodeOffsets;
baksmali.deodex = deodex;
baksmali.registerInfo = registerInfo;
baksmali.bootClassPath = bootClassPath;
baksmali.verify = verify;
ClassPath.ClassPathErrorHandler classPathErrorHandler = null;
if (ignoreErrors) {
classPathErrorHandler = new ClassPath.ClassPathErrorHandler() {
public void ClassPathError(String className, Exception ex) {
System.err.println(String.format("Skipping %s", className));
ex.printStackTrace(System.err);
}
};
}
boolean analyze = ! ClassPath.dontLoadClassPath
&& (registerInfo != 0 || deodex || verify);
if (analyze) {
try {
String[] extraBootClassPathArray = null;
if (extraBootClassPath != null && extraBootClassPath.length() > 0) {
assert extraBootClassPath.charAt(0) == ':';
extraBootClassPathArray = extraBootClassPath.substring(1).split(":");
}
if (dexFile.isOdex() && bootClassPath == null) {
//ext.jar is a special case - it is typically the 2nd jar in the boot class path, but it also
//depends on classes in framework.jar (typically the 3rd jar in the BCP). If the user didn't
//specify a -c option, we should add framework.jar to the boot class path by default, so that it
//"just works"
if (extraBootClassPathArray == null && isExtJar(dexFilePath)) {
extraBootClassPathArray = new String[] {"framework.jar"};
}
ClassPath.InitializeClassPathFromOdex(classPathDirs, extraBootClassPathArray, dexFilePath, dexFile,
classPathErrorHandler);
} else {
String[] bootClassPathArray = null;
if (bootClassPath != null) {
bootClassPathArray = bootClassPath.split(":");
}
ClassPath.InitializeClassPath(classPathDirs, bootClassPathArray, extraBootClassPathArray,
dexFilePath, dexFile, classPathErrorHandler);
}
} catch (Exception ex) {
System.err.println("\n\nError occured while loading boot class path files. Aborting.");
ex.printStackTrace(System.err);
System.exit(1);
}
}
File outputDirectoryFile = new File(outputDirectory);
if (!outputDirectoryFile.exists()) {
if (!outputDirectoryFile.mkdirs()) {
System.err.println("Can't create the output directory " + outputDirectory);
System.exit(1);
}
}
//sort the classes, so that if we're on a case-insensitive file system and need to handle classes with file
//name collisions, then we'll use the same name for each class, if the dex file goes through multiple
//baksmali/smali cycles for some reason. If a class with a colliding name is added or removed, the filenames
//may still change of course
ArrayList<ClassDefItem> classDefItems = new ArrayList<ClassDefItem>(dexFile.ClassDefsSection.getItems());
Collections.sort(classDefItems, new Comparator<ClassDefItem>() {
public int compare(ClassDefItem classDefItem1, ClassDefItem classDefItem2) {
return classDefItem1.getClassType().getTypeDescriptor().compareTo(classDefItem1.getClassType().getTypeDescriptor());
}
});
fileNameHandler fileNameHandler = new fileNameHandler(outputDirectoryFile);
for (ClassDefItem classDefItem: classDefItems) {
/**
* The path for the disassembly file is based on the package name
* The class descriptor will look something like:
* Ljava/lang/Object;
* Where the there is leading 'L' and a trailing ';', and the parts of the
* package name are separated by '/'
*/
if (analyze) {
//If we are analyzing the bytecode, make sure that this class is loaded into the ClassPath. If it isn't
//then there was some error while loading it, and we should skip it
ClassPath.ClassDef classDef = ClassPath.getClassDef(classDefItem.getClassType(), false);
if (classDef == null || classDef instanceof ClassPath.UnresolvedClassDef) {
continue;
}
}
String classDescriptor = classDefItem.getClassType().getTypeDescriptor();
//validate that the descriptor is formatted like we expect
if (classDescriptor.charAt(0) != 'L' ||
classDescriptor.charAt(classDescriptor.length()-1) != ';') {
System.err.println("Unrecognized class descriptor - " + classDescriptor + " - skipping class");
continue;
}
File smaliFile = fileNameHandler.getUniqueFilenameForClass(classDescriptor);
if (debug) {
String smaliPath = smaliFile.getPath();
smaliFile = new File(
smaliPath.substring(0, smaliPath.length() - 6) + ".java");
}
//create and initialize the top level string template
ClassDefinition classDefinition = new ClassDefinition(classDefItem);
//write the disassembly
Writer writer = null;
try
{
File smaliParent = smaliFile.getParentFile();
if (!smaliParent.exists()) {
if (!smaliParent.mkdirs()) {
System.err.println("Unable to create directory " + smaliParent.toString() + " - skipping class");
continue;
}
}
if (!smaliFile.exists()){
if (!smaliFile.createNewFile()) {
System.err.println("Unable to create file " + smaliFile.toString() + " - skipping class");
continue;
}
}
BufferedWriter bufWriter = new BufferedWriter(new OutputStreamWriter(
new FileOutputStream(smaliFile), "UTF8"));
writer = new IndentingWriter(bufWriter);
if (debug) {
TypeName name = TypeName.fromInternalName(
classDefItem.getClassType().getTypeDescriptor());
writer.write("package " + name.package_ + "; class "
+ name.getName(true, true) + " {/*\n\n");
}
classDefinition.writeTo((IndentingWriter)writer);
if (debug) {
writer.write("\n*/}\n");
}
} catch (Exception ex) {
System.err.println("\n\nError occured while disassembling class " + classDescriptor.replace('/', '.') + " - skipping class");
ex.printStackTrace();
}
finally
{
if (writer != null) {
try {
writer.close();
} catch (Throwable ex) {
System.err.println("\n\nError occured while closing file " + smaliFile.toString());
ex.printStackTrace();
}
}
}
if (!ignoreErrors && classDefinition.hadValidationErrors()) {
System.exit(1);
}
}
}
private static final Pattern extJarPattern = Pattern.compile("(?:^|\\\\|/)ext.(?:jar|odex)$");
private static boolean isExtJar(String dexFilePath) {
Matcher m = extJarPattern.matcher(dexFilePath);
return m.find();
}
}