/
ReadObjectClassVisitor.java
128 lines (109 loc) · 4.88 KB
/
ReadObjectClassVisitor.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
/*
* Copyright 2015 Kantega AS
*
* 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.kantega.notsoserial;
import org.objectweb.asm.*;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;
/**
*
*/
public class ReadObjectClassVisitor extends ClassVisitor{
private final String className;
private String serializableName = Type.getInternalName(Serializable.class);
private boolean serializable;
private String readObjectDescription = Type.getMethodDescriptor(Type.VOID_TYPE, Type.getType(ObjectInputStream.class));
private String[] readObjectExceptions = new String[] {Type.getType(IOException.class).getInternalName(), Type.getType(ClassNotFoundException.class).getInternalName()};
private boolean hasReadObject = false;
private String classSignature;
private int access;
private static Set<String> serializableTypes = new HashSet<String>();
private final String onReadObjectCallbackMethod;
public ReadObjectClassVisitor(ClassVisitor classVisitor, String className, String onReadObjectCallbackMethod) {
super(Opcodes.ASM5, classVisitor);
this.className = className;
this.onReadObjectCallbackMethod = onReadObjectCallbackMethod;
}
@Override
public void visit(int version, int access, String name, String signature, String supername, String[] interfaces) {
classSignature = signature;
this.access = access;
serializable = findSerializable(interfaces);
if(serializable || serializableTypes.contains(supername)) {
serializableTypes.add(name);
}
super.visit(version, access, name, signature, supername, interfaces);
}
private boolean isInterface() {
return (access & Opcodes.ACC_INTERFACE) != 0;
}
@Override
public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
if(!isInterface() && isSerializable() && name.equals("readObject") && readObjectDescription.equals(desc)) {
hasReadObject = true;
return new MethodVisitor(Opcodes.ASM5, super.visitMethod(access, name, desc, signature, exceptions)) {
@Override
public void visitCode() {
super.visitCode();
mv.visitLdcInsn(className);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, Type.getType(NotSoSerialClassFileTransformer.class).getInternalName(), onReadObjectCallbackMethod, "(Ljava/lang/String;)V", false);
}
};
} else {
return super.visitMethod(access, name, desc, signature, exceptions);
}
}
@Override
public void visitEnd() {
if(!isInterface() && isSerializable() && !hasReadObject) {
MethodVisitor mv = super.visitMethod(Opcodes.ACC_PRIVATE, "readObject", readObjectDescription, null, readObjectExceptions);
mv.visitCode();
Label l0 = new Label();
mv.visitLabel(l0);
mv.visitLdcInsn(className);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, Type.getType(NotSoSerialClassFileTransformer.class).getInternalName(), onReadObjectCallbackMethod, "(Ljava/lang/String;)V", false);
Label l1 = new Label();
mv.visitLabel(l1);
mv.visitVarInsn(Opcodes.ALOAD, 1);
mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/ObjectInputStream", "defaultReadObject", "()V", false);
Label l2 = new Label();
mv.visitLabel(l2);
mv.visitInsn(Opcodes.RETURN);
Label l3 = new Label();
mv.visitLabel(l3);
mv.visitLocalVariable("this", Type.getObjectType(className).getDescriptor(), classSignature, l0, l3, 0);
mv.visitLocalVariable("stream", Type.getType(ObjectInputStream.class).getDescriptor(), null, l0, l3, 1);
mv.visitMaxs(1, 2);
mv.visitEnd();
}
super.visitEnd();
}
private boolean findSerializable(String[] interfaces) {
if(interfaces != null) {
for (String anInterface : interfaces) {
if(anInterface.equals(serializableName)) {
return true;
}
}
}
return false;
}
public boolean isSerializable() {
return serializable || serializableTypes.contains(className);
}
}