- 目的：aosp源码修改，实现md5、sha1等算法入参和返回值的自吐。
- 环境：以下编译前环境准备、刷机都同于AOSP源码编译篇
- 系统产出：无root模式
-
进入源码根目录，运行如下命令
source build/envsetup.sh
mmm development/tools/idegen/
development/tools/idegen/idegen.sh
-
导入Android Studio
打开 Android Studio，选择 Open an existing Android Studio project，找到源码目录，点击 Android.ipr，Open，大约等 6 分钟，导入完毕。
首先要找到对应目标文件在源码哪个目录下，在源码中查找，可以看到对应路径。
修改内容如下：
// 添加库
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.*;
import java.lang.*;
import java.io.IOException;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.io.InputStream;
import java.io.ByteArrayInputStream;
import java.nio.ByteBuffer;
public abstract class MessageDigest extends MessageDigestSpi {
/**
* byte数组转hex
* @param bytes
* @return
*/
public static String byteToHex(byte[] bytes){
String strHex = "";
StringBuilder sb = new StringBuilder("");
for (int n = 0; n < bytes.length; n++) {
strHex = Integer.toHexString(bytes[n] & 0xFF);
sb.append((strHex.length() == 1) ? "0" + strHex : strHex); // 每个字节由两个字符表示，位数不够，高位补0
}
return sb.toString().trim();
}
/**
* Updates the digest using the specified array of bytes.
*
* @param input the array of bytes.
*/
public void update(byte[] input) {
String inputString = new String(input);
Class logClass = null;
try {
// 本文件没有引用log类，需要使用反射
logClass = this.getClass().getClassLoader().loadClass("android.util.Log");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
Method loge = null;
try {
loge = logClass.getMethod("e",String.class,String.class);
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
try {
loge.invoke(null,"r0ysue","input is => "+inputString);
Exception e = new Exception("r0ysueINPUT");
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
engineUpdate(input, 0, input.length);
state = IN_PROGRESS;
}
/**
* Completes the hash computation by performing final operations
* such as padding. The digest is reset after this call is made.
*
* @return the array of bytes for the resulting hash value.
*/
// public byte[] digest() throws ClassNotFoundException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {
public byte[] digest(){
/* Resetting is the responsibility of implementors. */
byte[] result = engineDigest();
state = INITIAL;
String resultString = byteToHex(result);
// Log.e("r0ysueDigest","result is => "+ resultString);
Class logClass = null;
try {
logClass = this.getClass().getClassLoader().loadClass("android.util.Log");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
Method loge = null;
try {
loge = logClass.getMethod("e",String.class,String.class);
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
try {
loge.invoke(null,"r0ysue","result is => "+resultString);
Exception e = new Exception("r0ysueRESULT");
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
return result;
}# cd /root/Desktop/COMPILE/aosp/
# export LC_ALL=C
# source build/envsetup.sh
# lunch选择对应的设备，因为要选择无root版，选项中也没有，手动输入lunch aosp_sailfish-user
# make update-api 更新改动
# make -j4
编译成功后刷入手机。
http://wuxiaolong.me/2018/08/15/AOSP3/
http://aosp.opersys.com/xref/android-8.1.0_r81/xref/libcore/openjdk_java_files.mk#61