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borisf/dex-method-dumper more idiomatic
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package com.google.classyshark.silverghost.translator.dex | |
object DexlibAdapter { | |
val primitiveTypes = mapOf( | |
"I" to "int", | |
"V" to "void", | |
"C" to "char", | |
"D" to "double", | |
"F" to "float", | |
"J" to "long", | |
"S" to "short", | |
"Z" to "boolean", | |
"B" to "byte") | |
} | |
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/* | |
* Copyright 2016 Google, Inc. | |
* | |
* 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 com.google.classyshark.silverghost.translator.dex | |
import org.objectweb.asm.Type | |
import org.ow2.asmdex.* | |
import java.io.* | |
import java.lang.reflect.Modifier | |
import java.util.zip.ZipInputStream | |
class MethodDumper { | |
companion object { | |
@JvmStatic fun main(args: Array<String>) { | |
println(MethodDumper().dumpMethods(File("/Users/bfarber/Desktop/Scenarios/4 APKs/com.android.chrome-52311111.apk"))) | |
} | |
} | |
fun dumpMethods(archiveFile: File): List<String> { | |
val result = arrayListOf<String>() | |
val zipFile = ZipInputStream(archiveFile.inputStream()) | |
zipFile.use { | |
var dexIndex = 0 | |
generateSequence { zipFile.nextEntry }.filter { it.name.endsWith(".dex") }.forEach { zipEntry -> | |
val tempFile = File.createTempFile("DUMPER_METHODS_classes${dexIndex}", "dex").apply { deleteOnExit() } | |
tempFile.outputStream().use { tempOut -> | |
zipFile.forEachBlock { bytes, length -> | |
tempOut.write(bytes, 0, length) | |
} | |
} | |
result.addAll(fillAnalysis(dexIndex, tempFile.inputStream())) | |
dexIndex++ | |
} | |
return result; | |
} | |
} | |
@Throws(IOException::class) | |
private fun fillAnalysis(dexIndex: Int, fis: InputStream): List<String> { | |
val results = arrayListOf<String>() | |
val av = ApkInspectVisitor(results) | |
val ar = ApplicationReader(Opcodes.ASM4, fis) | |
ar.accept(av, 0) | |
return results | |
} | |
private class ApkInspectVisitor(private val methodsList: MutableList<String>) : ApplicationVisitor(Opcodes.ASM4) { | |
override fun visitClass(access: Int, name: String, signature: Array<String>, superName: String, interfaces: Array<String>): ClassVisitor { | |
return object : ClassVisitor(Opcodes.ASM4) { | |
override fun visit(version: Int, access: Int, name: String, signature: Array<String>, superName: String, interfaces: Array<String>) { | |
super.visit(version, access, name, signature, superName, interfaces) | |
} | |
override fun visitMethod(access: Int, name: String, desc: String, signature: Array<String>, exceptions: Array<String>): MethodVisitor { | |
// class format (XYZ)R | |
// dex format RXYZ | |
val builder = StringBuilder() | |
builder.append(Modifier.toString(access)) | |
builder.append(" " + getDecName(popReturn(desc))) | |
builder.append(" " + name) | |
// using java class convert + types from ASM | |
val parameterTypes = Type.getArgumentTypes("(${popType(desc)})") | |
builder.append("(") | |
var prefix = "" | |
for (pType in parameterTypes) { | |
builder.append(prefix) | |
prefix = "," | |
builder.append(getDecName(pType.toString())) | |
} | |
builder.append(")\n") | |
methodsList.add(builder.toString()) | |
return super.visitMethod(access, name, desc, signature, exceptions) | |
} | |
} | |
} | |
private fun getDecName(dexType: String): String { | |
return when { | |
dexType.startsWith("[") -> getDecName(dexType.substring(1)) + "[]" | |
dexType.startsWith("L") -> dexType.substring(1, dexType.length - 1).replace('/', '.') | |
DexlibAdapter.primitiveTypes.containsKey(dexType) -> DexlibAdapter.primitiveTypes[dexType]!! | |
else -> "void" | |
} | |
} | |
private fun popType(desc: String): String { | |
return desc.substring(nextTypePosition(desc, 0)) | |
} | |
private fun popReturn(desc: String): String { | |
return desc.substring(0, desc.indexOf(popType(desc))) | |
} | |
private fun nextTypePosition(desc: String, startPos: Int): Int { | |
var pos = startPos | |
while (desc[pos] == '[') { pos++ } | |
if (desc[pos] == 'L') { pos = desc.indexOf(';', pos) } | |
pos++ | |
return pos | |
} | |
} | |
// TODO: move to common utilities | |
fun ZipInputStream.forEachBlock(blockSize: Int = 1024, func: (ByteArray, Int) -> Unit) { | |
val bytes = ByteArray(blockSize) | |
generateSequence<Pair<ByteArray, Int>> { | |
val readLen = this.read(bytes) | |
if (readLen < 0) null | |
else Pair(bytes, readLen) | |
}.forEach { func(it.first, it.second) } | |
} | |
} |
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