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Fix JDGUI decompiler

This commit is contained in:
Nico Mexis 2021-09-14 19:36:56 +02:00
parent 55bfc32185
commit 511272aa36
No known key found for this signature in database
GPG Key ID: 27D6E17CE092AB78
1 changed files with 12 additions and 9 deletions
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21
src/main/java/the/bytecode/club/bytecodeviewer/decompilers/jdgui/JDGUIClassFileUtil.java
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@ -5,7 +5,6 @@ import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Objects;
import org.jd.core.v1.model.classfile.constant.Constant;
import org.jd.core.v1.model.classfile.constant.ConstantClass;
import org.jd.core.v1.model.classfile.constant.ConstantUtf8;
@ -29,8 +28,9 @@ public class JDGUIClassFileUtil
BufferedInputStream bis = new BufferedInputStream(fis);
DataInputStream dis = new DataInputStream(bis)) {
int magic = dis.readInt();
if (magic != ClassFileReader.JAVA_MAGIC_NUMBER)
if (magic != ClassFileReader.JAVA_MAGIC_NUMBER) {
throw new ClassFileFormatException("Invalid Java .class file");
}
/* int minor_version = */
dis.readUnsignedShort();
@ -43,16 +43,18 @@ public class JDGUIClassFileUtil
dis.readUnsignedShort();
int this_class = dis.readUnsignedShort();
if (this_class > Objects.requireNonNull(constants).length) {
if (this_class > constants.length) {
throw new ClassFileFormatException("Unknown Java structure");
}
Constant c = constants[this_class];
if ((c == null) || (c.getTag() != Constant.CONSTANT_Class))
if ((c == null) || (c.getTag() != Constant.CONSTANT_Class)) {
throw new ClassFileFormatException("Invalid constant pool");
}
c = constants[((ConstantClass) c).getNameIndex()];
if ((c == null) || (c.getTag() != Constant.CONSTANT_Utf8))
if ((c == null) || (c.getTag() != Constant.CONSTANT_Utf8)) {
throw new ClassFileFormatException("Invalid constant pool");
}
String internalClassName = ((ConstantUtf8) c).getValue();
String pathSuffix = internalClassName.replace(
@ -61,8 +63,9 @@ public class JDGUIClassFileUtil
int index = pathToClass.indexOf(pathSuffix);
if (index < 0)
if (index < 0) {
throw new ClassFileFormatException("Invalid internal class name");
}
directoryPath = pathToClass.substring(0, index);
} catch (IOException e) {
@ -87,9 +90,6 @@ public class JDGUIClassFileUtil
private static Constant[] DeserializeConstants(DataInputStream dis)
throws IOException {
int count = dis.readUnsignedShort();
if (count == 0)
return null;
Constant[] constants = new Constant[count];
for (int i = 1; i < count; i++) {
@ -112,12 +112,15 @@ public class JDGUIClassFileUtil
case Constant.CONSTANT_FieldRef:
case Constant.CONSTANT_MethodRef:
case Constant.CONSTANT_InterfaceMethodRef:
case Constant.CONSTANT_InvokeDynamic:
case Constant.CONSTANT_NameAndType:
case Constant.CONSTANT_Integer:
case Constant.CONSTANT_Float:
dis.read();
case Constant.CONSTANT_MethodHandle:
dis.read();
case Constant.CONSTANT_String:
case Constant.CONSTANT_MethodType:
dis.read();
dis.read();
break;