kitsook

package net.clarenceho;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

kitsook

---
name: "BigDecimal explicit toString"
description: "find code that explicitly call BigDecimal toString"
condition: "resolvedMethodRef.getPackageName().toString().equals(\"java.math\") &&
  resolvedMethodRef.getClassName().toString().equals(\"BigDecimal\") &&
  node.getName().toString() == \"toString\""
actions:
  - "System.out.print(\"Cautions! Explicitly calling BigDecimal toString() in \" + file.toString());
    if (node.getRange().isPresent()) {
      System.out.println(\" at \" + node.getRange().get().toString());

kitsook

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import java.util.concurrent.ForkJoinPool;
import java.util.stream.IntStream;

public class ShufflePerformance {
  private static final int PARALLELISM = 4;
  private static final int LIST_SIZE = 100;

kitsook

#!/bin/bash
set -e

## Script to rip VCD with VLC and then transcode with ffmpeg

if [ "${BASH_VERSINFO}" -lt 4 ]; then
    echo "Require bash 4 or higher"
    exit 1
fi

kitsook

FROM ubuntu:20.04

RUN apt-get update && apt-get upgrade -y && apt-get install -y socat

RUN set -e -x; \
        groupadd -g 1337 user; \
        useradd -g 1337 -u 1337 -m user

COPY attachments/chal /home/user/
COPY flag /home/user/

kitsook

ROCk module is loaded
userx is member of video group
=====================   
HSA System Attributes   
=====================   
Runtime Version:         1.1
System Timestamp Freq.:  1000.000000MHz
Sig. Max Wait Duration:  18446744073709551615 (0xFFFFFFFFFFFFFFFF) (timestamp count)
Machine Model:           LARGE                             
System Endianness:       LITTLE                            

kitsook

~$ sudo lsusb -v

Bus 002 Device 002: ID 0bda:0411 Realtek Semiconductor Corp. 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               3.20
  bDeviceClass            9 Hub
  bDeviceSubClass         0 Unused
  bDeviceProtocol         3 

kitsook

~$ dmesg
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.9.140-tegra (buildbrain@mobile-u64-3531) (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05) ) #1 SMP PREEMPT Wed Mar 13 00:32:22 PDT 2019
[    0.000000] Boot CPU: AArch64 Processor [411fd071]
[    0.000000] OF: fdt:memory scan node memory@80000000, reg size 48,
[    0.000000] OF: fdt: - 80000000 ,  7ee00000
[    0.000000] OF: fdt: - 100000000 ,  7f200000
[    0.000000] Found tegra_fbmem: 00800000@92cb6000
[    0.000000] OF: fdt:Reserved memory: failed to reserve memory for node 'fb0_carveout': base 0x0000000000000000, size 0 MiB
[    0.000000] OF: fdt:Reserved memory: failed to reserve memory for node 'fb0_carveout': base 0x0000000000000000, size 0 MiB

kitsook

~$ cat /proc/cpuinfo
processor	: 0
model name	: ARMv8 Processor rev 1 (v8l)
BogoMIPS	: 38.40
Features	: fp asimd evtstrm aes pmull sha1 sha2 crc32
CPU implementer	: 0x41
CPU architecture: 8
CPU variant	: 0x1
CPU part	: 0xd07
CPU revision	: 1

kitsook

package net.clarenceho.TriFib;

import java.util.stream.Stream;
import java.math.BigInteger;

public class FibonacciNum {

    /**
     * Stream of Fibonacci number in BigInteger
     * @return  stream of Fibonacci number