moparisthebest/android_external_SafeParcel
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mar-v-in 2015-01-06 03:55:57 +01:00
commit 53bf6bc84b
8 changed files with 619 additions and 0 deletions
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7
Android.mk Normal file
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LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := SafeParcel
LOCAL_SRC_FILES := $(call all-java-files-under, src)
include $(BUILD_STATIC_JAVA_LIBRARY)

4
AndroidManifest.xml Normal file
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<?xml version="1.0" encoding="utf-8"?>
<manifest package="org.microg.safeparcel">
<!-- This is not needed, it's just here to stop build systems from complaining -->
</manifest>

25
build.gradle Normal file
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buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'com.android.tools.build:gradle:1.0.0'
}
}
apply plugin: 'com.android.library'
android {
compileSdkVersion 21
buildToolsVersion "21.0.2"
lintOptions.abortOnError false
sourceSets {
main {
manifest.srcFile 'AndroidManifest.xml'
java.srcDirs = ['src']
aidl.srcDirs = ['src']
}
}
}
dependencies {
}

131
src/org/microg/safeparcel/SafeParcelReader.java Normal file
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/*
* Copyright (c) 2014 μg Project Team
*
* 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 org.microg.safeparcel;
import android.os.IBinder;
import android.os.Parcel;
import android.os.Parcelable;
public class SafeParcelReader {
public static int halfOf(int i) {
return i & 0xFFFF;
}
public static int readSingleInt(Parcel parcel) {
return parcel.readInt();
}
private static int readStart(Parcel parcel, int first) {
if ((first & 0xFFFF0000) != -65536)
return first >> 16 & 0xFFFF;
return parcel.readInt();
}
private static void readStart(Parcel parcel, int position, int length) {
int i = readStart(parcel, position);
if (i != length)
throw new ReadException("Expected size " + length + " got " + i + " (0x" + Integer.toHexString(i) + ")", parcel);
}
public static int readStart(Parcel parcel) {
int first = readSingleInt(parcel);
int length = readStart(parcel, first);
int start = parcel.dataPosition();
if (halfOf(first) != SafeParcelable.SAFE_PARCEL_MAGIC)
throw new ReadException("Expected object header. Got 0x" + Integer.toHexString(first), parcel);
int end = start + length;
if ((end < start) || (end > parcel.dataSize()))
throw new ReadException("Size read is invalid start=" + start + " end=" + end, parcel);
return end;
}
public static int readInt(Parcel parcel, int position) {
readStart(parcel, position, 4);
return parcel.readInt();
}
public static byte readByte(Parcel parcel, int position) {
readStart(parcel, position, 4);
return (byte) parcel.readInt();
}
public static short readShort(Parcel parcel, int position) {
readStart(parcel, position, 4);
return (short) parcel.readInt();
}
public static boolean readBool(Parcel parcel, int position) {
readStart(parcel, position, 4);
return parcel.readInt() != 0;
}
public static long readLong(Parcel parcel, int position) {
readStart(parcel, position, 8);
return parcel.readLong();
}
public static float readFloat(Parcel parcel, int position) {
readStart(parcel, position, 4);
return parcel.readFloat();
}
public static double readDouble(Parcel parcel, int position) {
readStart(parcel, position, 8);
return parcel.readDouble();
}
public static String readString(Parcel parcel, int position) {
int length = readStart(parcel, position);
int start = parcel.dataPosition();
if (length == 0)
return null;
String string = parcel.readString();
parcel.setDataPosition(start + length);
return string;
}
public static IBinder readBinder(Parcel parcel, int position) {
int length = readStart(parcel, position);
int start = parcel.dataPosition();
if (length == 0)
return null;
IBinder binder = parcel.readStrongBinder();
parcel.setDataPosition(start + length);
return binder;
}
public static <T extends Parcelable> T readParcelable(Parcel parcel, int position, Parcelable.Creator<T> creator) {
int length = readStart(parcel, position);
int start = parcel.dataPosition();
if (length == 0)
return null;
T t = creator.createFromParcel(parcel);
parcel.setDataPosition(start + length);
return t;
}
public static void skip(Parcel parcel, int position) {
int i = readStart(parcel, position);
parcel.setDataPosition(parcel.dataPosition() + i);
}
public static class ReadException extends RuntimeException {
public ReadException(String message, Parcel parcel) {
super(message);
}
}
}

179
src/org/microg/safeparcel/SafeParcelUtil.java Normal file
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package org.microg.safeparcel;
import android.os.IBinder;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.Log;
import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;
public class SafeParcelUtil {
private static final String TAG = "SafeParcel";
public static void writeObject(SafeParcelable object, Parcel parcel, int flags) {
if (object == null)
throw new NullPointerException();
Class clazz = object.getClass();
int start = SafeParcelWriter.writeStart(parcel);
while (clazz != null) {
for (Field field : clazz.getDeclaredFields()) {
if (field.isAnnotationPresent(SafeParceled.class)) {
try {
writeField(object, parcel, field, flags);
} catch (Exception e) {
Log.w(TAG, "Error writing field: " + e);
}
}
}
clazz = clazz.getSuperclass();
}
SafeParcelWriter.writeEnd(parcel, start);
}
public static void readObject(SafeParcelable object, Parcel parcel) {
if (object == null)
throw new NullPointerException();
Class clazz = object.getClass();
Map<Integer, Field> fieldMap = new HashMap<>();
while (clazz != null) {
for (Field field : clazz.getDeclaredFields()) {
if (field.isAnnotationPresent(SafeParceled.class)) {
int fieldNum = field.getAnnotation(SafeParceled.class).value();
if (fieldMap.containsKey(fieldNum)) {
throw new RuntimeException(
"Field number " + fieldNum + " is used twice in " +
clazz.getName() + " for fields " + field.getName() +
" and " + fieldMap.get(fieldNum).getName());
}
fieldMap.put(fieldNum, field);
}
}
clazz = clazz.getSuperclass();
}
int end = SafeParcelReader.readStart(parcel);
while (parcel.dataPosition() < end) {
int position = SafeParcelReader.readSingleInt(parcel);
int fieldNum = SafeParcelReader.halfOf(position);
if (!fieldMap.containsKey(fieldNum)) {
Log.w(TAG,
"Unknown field num " + fieldNum + " in " + clazz.getName() + ", skipping.");
SafeParcelReader.skip(parcel, position);
} else {
try {
readField(object, parcel, fieldMap.get(fieldNum), position);
} catch (Exception e) {
Log.w(TAG, "Error reading field: " + fieldNum + " in " + clazz.getName() +
", skipping.", e);
SafeParcelReader.skip(parcel, position);
}
}
}
if (parcel.dataPosition() > end) {
throw new RuntimeException("Overread allowed size end=" + end);
}
}
private static Parcelable.Creator getCreator(Field field)
throws IllegalAccessException {
try {
return (Parcelable.Creator) field.getType().getDeclaredField("CREATOR").get(null);
} catch (NoSuchFieldException e) {
throw new RuntimeException(
field.getType() + " is an Parcelable without CREATOR");
}
}
private static void writeField(SafeParcelable object, Parcel parcel, Field field, int flags)
throws IllegalAccessException {
int num = field.getAnnotation(SafeParceled.class).value();
boolean mayNull = field.getAnnotation(SafeParceled.class).mayNull();
boolean acc = field.isAccessible();
field.setAccessible(true);
switch (SafeParcelType.fromClass(field.getType())) {
case Parcelable:
SafeParcelWriter.write(parcel, num, (Parcelable) field.get(object), flags, mayNull);
break;
case Binder:
SafeParcelWriter.write(parcel, num, (IBinder) field.get(object), mayNull);
break;
case Integer:
SafeParcelWriter.write(parcel, num, (Integer) field.get(object));
break;
case Long:
SafeParcelWriter.write(parcel, num, (Long) field.get(object));
break;
case Boolean:
SafeParcelWriter.write(parcel, num, (Boolean) field.get(object));
break;
case Float:
SafeParcelWriter.write(parcel, num, (Float) field.get(object));
break;
case Double:
SafeParcelWriter.write(parcel, num, (Double) field.get(object));
break;
case String:
SafeParcelWriter.write(parcel, num, (String) field.get(object), mayNull);
}
field.setAccessible(acc);
}
private static void readField(SafeParcelable object, Parcel parcel, Field field, int position)
throws IllegalAccessException {
boolean acc = field.isAccessible();
field.setAccessible(true);
switch (SafeParcelType.fromClass(field.getType())) {
case Parcelable:
field.set(object, SafeParcelReader
.readParcelable(parcel, position, getCreator(field)));
break;
case Binder:
field.set(object, SafeParcelReader.readBinder(parcel,
position));
break;
case Integer:
field.set(object, SafeParcelReader.readInt(parcel, position));
break;
case Long:
field.set(object, SafeParcelReader.readLong(parcel, position));
break;
case Boolean:
field.set(object, SafeParcelReader.readBool(parcel, position));
break;
case Float:
field.set(object, SafeParcelReader.readFloat(parcel, position));
break;
case Double:
field.set(object, SafeParcelReader.readDouble(parcel, position));
break;
case String:
field.set(object, SafeParcelReader.readString(parcel, position));
}
field.setAccessible(acc);
}
private enum SafeParcelType {
Parcelable, Binder, Integer, Long, Boolean, Float, Double, String;
public static SafeParcelType fromClass(Class clazz) {
if (Parcelable.class.isAssignableFrom(clazz))
return Parcelable;
if (IBinder.class.isAssignableFrom(clazz))
return Binder;
if (clazz == int.class || clazz == Integer.class)
return Integer;
if (clazz == boolean.class || clazz == Boolean.class)
return Boolean;
if (clazz == long.class || clazz == Long.class)
return Long;
if (clazz == float.class || clazz == Float.class)
return Float;
if (clazz == double.class || clazz == Double.class)
return Float;
if (clazz == java.lang.String.class)
return String;
throw new RuntimeException("Type is not yet usable with SafeParcelUtil: " + clazz);
}
}
}

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src/org/microg/safeparcel/SafeParcelWriter.java Normal file
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/*
* Copyright (c) 2014 μg Project Team
*
* 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 org.microg.safeparcel;
import android.os.Bundle;
import android.os.IBinder;
import android.os.Parcel;
import android.os.Parcelable;
import java.util.List;
public class SafeParcelWriter {
private static void writeStart(Parcel parcel, int position, int length) {
if (length >= 65535) {
parcel.writeInt(0xFFFF0000 | position);
parcel.writeInt(length);
} else {
parcel.writeInt(length << 16 | position);
}
}
public static int writeStart(Parcel parcel) {
return writeStart(parcel, SafeParcelable.SAFE_PARCEL_MAGIC);
}
private static int writeStart(Parcel parcel, int position) {
parcel.writeInt(0xFFFF0000 | position);
parcel.writeInt(0);
return parcel.dataPosition();
}
public static void writeEnd(Parcel parcel, int start) {
int end = parcel.dataPosition();
int length = end - start;
parcel.setDataPosition(start - 4);
parcel.writeInt(length);
parcel.setDataPosition(end);
}
public static void write(Parcel parcel, int position, Boolean val) {
if (val == null) return;
writeStart(parcel, position, 4);
parcel.writeInt(val ? 1 : 0);
}
public static void write(Parcel parcel, int position, Byte val) {
if (val == null) return;
writeStart(parcel, position, 4);
parcel.writeInt(val);
}
public static void write(Parcel parcel, int position, Short val) {
if (val == null) return;
writeStart(parcel, position, 4);
parcel.writeInt(val);
}
public static void write(Parcel parcel, int position, Integer val) {
if (val == null) return;
writeStart(parcel, position, 4);
parcel.writeInt(val);
}
public static void write(Parcel parcel, int position, Long val) {
if (val == null) return;
writeStart(parcel, position, 8);
parcel.writeLong(val);
}
public static void write(Parcel parcel, int position, Float val) {
if (val == null) return;
writeStart(parcel, position, 4);
parcel.writeFloat(val);
}
public static void write(Parcel parcel, int position, Double val) {
if (val == null) return;
writeStart(parcel, position, 8);
parcel.writeDouble(val);
}
public static void write(Parcel parcel, int position, String val, boolean mayNull) {
if (val == null) {
if (mayNull) {
writeStart(parcel, position, 0);
}
} else {
int start = writeStart(parcel, position);
parcel.writeString(val);
writeEnd(parcel, start);
}
}
public static void write(Parcel parcel, int position, Parcelable val, int flags, boolean mayNull) {
if (val == null) {
if (mayNull) {
writeStart(parcel, position, 0);
}
} else {
int start = writeStart(parcel, position);
val.writeToParcel(parcel, flags);
writeEnd(parcel, start);
}
}
public static void write(Parcel parcel, int position, Bundle val, boolean mayNull) {
if (val == null) {
if (mayNull) {
writeStart(parcel, position, 0);
}
} else {
int start = writeStart(parcel, position);
parcel.writeBundle(val);
writeEnd(parcel, start);
}
}
public static void write(Parcel parcel, int position, byte[] val, boolean mayNull) {
if (val == null) {
if (mayNull) {
writeStart(parcel, position, 0);
}
} else {
int start = writeStart(parcel, position);
parcel.writeByteArray(val);
writeEnd(parcel, start);
}
}
public static void write(Parcel parcel, int position, String[] val, boolean mayNull) {
if (val == null) {
if (mayNull) {
writeStart(parcel, position, 0);
}
} else {
int start = writeStart(parcel, position);
parcel.writeStringArray(val);
writeEnd(parcel, start);
}
}
public static void writeStringList(Parcel parcel, int position, List<String> val, boolean mayNull) {
if (val == null) {
if (mayNull) {
writeStart(parcel, position, 0);
}
} else {
int start = writeStart(parcel, position);
parcel.writeStringList(val);
writeEnd(parcel, start);
}
}
private static <T extends Parcelable> void writeArrayPart(Parcel parcel, T val, int flags) {
int before = parcel.dataPosition();
parcel.writeInt(1);
int start = parcel.dataPosition();
val.writeToParcel(parcel, flags);
int end = parcel.dataPosition();
parcel.setDataPosition(before);
parcel.writeInt(end - start);
parcel.setDataPosition(end);
}
public static <T extends Parcelable> void write(Parcel parcel, int position, T[] val, int flags, boolean mayNull) {
if (val == null) {
if (mayNull) {
writeStart(parcel, position, 0);
}
} else {
int start = writeStart(parcel, position);
parcel.writeInt(val.length);
for (T t : val) {
if (t == null) {
parcel.writeInt(0);
} else {
writeArrayPart(parcel, t, flags);
}
}
writeEnd(parcel, start);
}
}
public static void write(Parcel parcel, int position, Parcel val, boolean mayNull) {
if (val == null) {
if (mayNull) {
writeStart(parcel, position, 0);
}
} else {
int start = writeStart(parcel, position);
parcel.appendFrom(val, 0, val.dataSize());
writeEnd(parcel, start);
}
}
public static void write(Parcel parcel, int position, List val, boolean mayNull) {
if (val == null) {
if (mayNull) {
writeStart(parcel, position, 0);
}
} else {
int start = writeStart(parcel, position);
parcel.writeList(val);
writeEnd(parcel, start);
}
}
public static void write(Parcel parcel, int position, IBinder val, boolean mayNull) {
if (val == null) {
if (mayNull) {
writeStart(parcel, position, 0);
}
} else {
int start = writeStart(parcel, position);
parcel.writeStrongBinder(val);
writeEnd(parcel, start);
}
}
}

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src/org/microg/safeparcel/SafeParcelable.java Normal file
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/*
* Copyright (c) 2014 μg Project Team
*
* 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 org.microg.safeparcel;
import android.os.Parcelable;
public interface SafeParcelable extends Parcelable {
public static final String NULL = "SAFE_PARCELABLE_NULL_STRING";
int SAFE_PARCEL_MAGIC = 20293;
}

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src/org/microg/safeparcel/SafeParceled.java Normal file
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package org.microg.safeparcel;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.FIELD)
public @interface SafeParceled {
int value();
boolean mayNull() default false;
}