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Improved Javap

This commit is contained in:
Konloch 2021-07-12 05:50:23 -07:00
parent 600b88e05e
commit f349e6a8f1
2 changed files with 20 additions and 7 deletions
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15
src/main/java/the/bytecode/club/bytecodeviewer/decompilers/impl/JavapDisassembler.java
View File

@ -5,6 +5,7 @@ import me.konloch.kontainer.io.DiskWriter;
import org.objectweb.asm.tree.ClassNode;
import org.objectweb.asm.util.Textifier;
import org.objectweb.asm.util.TraceClassVisitor;
import the.bytecode.club.bytecodeviewer.BytecodeViewer;
import the.bytecode.club.bytecodeviewer.Configuration;
import the.bytecode.club.bytecodeviewer.Constants;
import the.bytecode.club.bytecodeviewer.decompilers.InternalDecompiler;
@ -65,7 +66,7 @@ public class JavapDisassembler extends InternalDecompiler
DiskWriter.replaceFileBytes(tempClass.getAbsolutePath(), b, false);
JFrameConsolePrintStream sysOut = null;
JFrameConsolePrintStream sysOutBuffer = null;
try
{
URLClassLoader child = new URLClassLoader(
@ -78,7 +79,10 @@ public class JavapDisassembler extends InternalDecompiler
Object cl = javap.newInstance();
//pipe sys out
sysOut = new JFrameConsolePrintStream("", false);
sysOutBuffer = new JFrameConsolePrintStream("", false);
//silence security manager debugging
BytecodeViewer.sm.silenceExec(true);
//invoke Javap
main.invoke(cl, (Object) new String[]{"-c", "-l", "-constants", tempClass.getAbsolutePath()});
@ -89,13 +93,14 @@ public class JavapDisassembler extends InternalDecompiler
}
finally
{
BytecodeViewer.sm.silenceExec(false);
tempClass.delete();
}
if(sysOut != null)
if(sysOutBuffer != null)
{
sysOut.finished();
return sysOut.getTextAreaOutputStreamOut().getBuffer().toString();
sysOutBuffer.finished();
return sysOutBuffer.getTextAreaOutputStreamOut().getBuffer().toString();
}
return SEND_STACKTRACE_TO;

12
src/main/java/the/bytecode/club/bytecodeviewer/util/SecurityMan.java
View File

@ -32,10 +32,15 @@ import java.security.Permission;
public class SecurityMan extends SecurityManager
{
private int blocking = 1; //might be insecure due to assholes targeting BCV
private int blocking = 1; //TODO replace with a more secure system
private int silentExec = 1;
private boolean printing = false;
private boolean printingPackage = false;
public void silenceExec(boolean b) {
silentExec += (b ? 1 : -1);
}
public void resumeBlocking() {
blocking++;
}
@ -89,7 +94,10 @@ public class SecurityMan extends SecurityManager
}
if (allow && blocking == 0)
System.out.println("Allowing exec: " + cmd);
{
if(silentExec == 1)
System.out.println("Allowing exec: " + cmd);
}
else throw new SecurityException("BCV is awesome, blocking(" + blocking + ") exec " + cmd);
}