HGAME 2024 MISC Writeup

#coding=utf-8
from PIL import Image
import os

GIF_name = "dragon.gif"
GIF = Image.open(GIF_name)
GIF_dir = GIF_name[:-4] + "_BreakDown"  #[:-4]返回从开头到倒数第五个字符的内容

if not os.path.exists(GIF_dir):
    os.mkdir(GIF_dir)

try:
    while True:
        GIF_current = GIF.tell()  #开始为0帧 tell()返回当前帧数
        GIF.save(GIF_dir + "\\" + str(GIF_current) + ".png")  #python中两\\表示一\
        GIF.seek(GIF_current + 1)
except EOFError:  #EOFError是Python中的一个异常类型，表示在读取输入时已经到达了文件的末尾
    pass  #pass是空语句，用于保持结构的完整性，不做任何事

c = [125,102,50,102,97,56,50,57,53,99,56,51,100,45,54,99,97,98,45,56,57,101,52,45,53,50,55,49,45,55,101,102,97,98,97,98,99,123,103,97,108,102,44][::-1]
flag = ''
for i in c:
    flag += chr(i)
print (flag)

normalkeys = {"04":"a", "05":"b", "06":"c", "07":"d", "08":"e", "09":"f", "0a":"g", "0b":"h", "0c":"i", "0d":"j", "0e":"k", "0f":"l", "10":"m", "11":"n", "12":"o", "13":"p", "14":"q", "15":"r", "16":"s", "17":"t", "18":"u", "19":"v", "1a":"w", "1b":"x", "1c":"y", "1d":"z","1e":"1", "1f":"2", "20":"3", "21":"4", "22":"5", "23":"6","24":"7","25":"8","26":"9","27":"0","28":"<RET>","29":"<ESC>","2a":"<DEL>", "2b":"\t","2c":"<SPACE>","2d":"-","2e":"=","2f":"[","30":"]","31":"\\","32":"<NON>","33":";","34":"'","35":"`","36":",","37":".","38":"/","39":"<CAP>","3a":"<F1>","3b":"<F2>", "3c":"<F3>","3d":"<F4>","3e":"<F5>","3f":"<F6>","40":"<F7>","41":"<F8>","42":"<F9>","43":"<F10>","44":"<F11>","45":"<F12>"}
shiftkeys = {"04":"A", "05":"B", "06":"C", "07":"D", "08":"E", "09":"F", "0a":"G", "0b":"H", "0c":"I", "0d":"J", "0e":"K", "0f":"L", "10":"M", "11":"N", "12":"O", "13":"P", "14":"Q", "15":"R", "16":"S", "17":"T", "18":"U", "19":"V", "1a":"W", "1b":"X", "1c":"Y", "1d":"Z","1e":"!", "1f":"@", "20":"#", "21":"$", "22":"%", "23":"^","24":"&","25":"*","26":"(","27":")","28":"<RET>","29":"<ESC>","2a":"<DEL>", "2b":"\t","2c":"<SPACE>","2d":"_","2e":"+","2f":"{","30":"}","31":"|","32":"<NON>","33":"\"","34":":","35":"~","36":"<","37":">","38":"?","39":"<CAP>","3a":"<F1>","3b":"<F2>", "3c":"<F3>","3d":"<F4>","3e":"<F5>","3f":"<F6>","40":"<F7>","41":"<F8>","42":"<F9>","43":"<F10>","44":"<F11>","45":"<F12>"}
with open('hgame2.txt') as data:
    for line in data:
        information1=line[6:8]
        information2=line[8:10]
        if information1=='00':
            continue
        if line[3]=='2': #shiftkey
            print (shiftkeys[information1],end='') #end=''以空字符替换原默认换行符
            if information2!='00':
                print (shiftkeys[information2],end='')
        if line[3]=='0': #normalkey
            print (normalkeys[information1],end='')
            if information2!='00':
                print (normalkeys[information2],end='')

normalKeys = {"04": "a", "05": "b", "06": "c", "07": "d", "08": "e", "09":
"f", "0a": "g", "0b": "h", "0c": "i",
"0d": "j", "0e": "k", "0f": "l", "10": "m", "11": "n", "12":
"o", "13": "p", "14": "q", "15": "r",
"16": "s", "17": "t", "18": "u", "19": "v", "1a": "w", "1b":
"x", "1c": "y", "1d": "z", "1e": "1",
"1f": "2", "20": "3", "21": "4", "22": "5", "23": "6", "24":
"7", "25": "8", "26": "9", "27": "0",
"28": "<RET>", "29": "<ESC>", "2a": "<DEL>", "2b": "\t", "2c": "<SPACE>", "2d": "-", "2e": "=", "2f": "[",
"30": "]", "31": "\\", "32": "<NON>", "33": ";", "34": "'",
"35": "<GA>", "36": ",", "37": ".", "38": "/",
"39": "<CAP>", "3a": "<F1>", "3b": "<F2>", "3c": "<F3>", "3d": "<F4>", "3e": "<F5>", "3f": "<F6>",
"40": "<F7>", "41": "<F8>", "42": "<F9>", "43": "<F10>", "44": "<F11>", "45": "<F12>"}
shiftKeys = {"04": "A", "05": "B", "06": "C", "07": "D", "08": "E", "09": "F",
"0a": "G", "0b": "H", "0c": "I",
"0d": "J", "0e": "K", "0f": "L", "10": "M", "11": "N", "12": "O",
"13": "P", "14": "Q", "15": "R",
"16": "S", "17": "T", "18": "U", "19": "V", "1a": "W", "1b": "X",
"1c": "Y", "1d": "Z", "1e": "!",
"1f": "@", "20": "#", "21": "$", "22": "%", "23": "^", "24": "&",
"25": "*", "26": "(", "27": ")",
"28": "<RET>", "29": "<ESC>", "2a": "<DEL>", "2b": "\t", "2c": "<SPACE>", "2d": "_", "2e": "+", "2f": "{",
"30": "}", "31": "|", "32": "<NON>", "33": "\"", "34": ":", "35":
"~", "36": "<", "37": ">", "38": "?",
"39": "<CAP>", "3a": "<F1>", "3b": "<F2>", "3c": "<F3>", "3d": "<F4>", "3e": "<F5>", "3f": "<F6>",
"40": "<F7>", "41": "<F8>", "42": "<F9>", "43": "<F10>", "44": "<F11>", "45": "<F12>"}
output = []
last = []
new = []
keys = open('hgame2.txt')
press = ''
for line in keys:
    try:
        if line[2]!='0' or (line[3]!='0' and line[3]!='2'):
            continue
        offset = 6
        new = []
        while line[offset:offset+2] != '00':
            press = line[offset:offset+2]
            if press in normalKeys.keys():
                if line[3]=='0':
                    key = normalKeys[press]
                else:
                    key = shiftKeys[press]
            else:
                key = '[unknown]'
            if press not in last:
                output.append(key)
            new.append(press)
            offset += 2
    except:
        print(line)
    finally:
        last = new

keys.close()
flag=0

for i in range(len(output)):
    try:
        if output[i]=="<CAP>":
            flag = 1-flag
        if flag!=0:
            output[i]=output[i].upper()
    except:
        pass
output = [x for x in output if x != '<CAP>']

new_output = []

for i in range(len(output)):
    if output[i] == "<DEL>":
        new_output = new_output[:-1]
    else:
        new_output.append(output[i])

print ("".join(new_output))

def xor_with_0x27(input_file, output_file):
    with open(input_file, 'rb') as f:
        data = f.read()
    xor_data = bytearray([b ^ 0x27 for b in data])
    with open(output_file, 'wb') as f:
        f.write(xor_data)

# 使用xor函数
xor_with_0x27('maybezip', 'output.zip')

import zipfile
import json
from datetime import datetime

def get_all_file_modification_time(zip_path):
    result = {}
    with zipfile.ZipFile(zip_path, 'r') as myzip:
        for file in myzip.namelist():
            info = myzip.getinfo(file)
            mod_time = datetime(*info.date_time)
            result[file] = str(mod_time)
    return result

# 使用函数并保存结果为json
result = get_all_file_modification_time('output.zip')
with open('output.json', 'w') as f:
    json.dump(result, f)

import json

# 读取json文件
with open('output.json', 'r') as f:
    data = json.load(f)
string_of_01 =''
# 遍历json数据
for file, time in data.items():
    # 检查文件名是否在指定范围内
    if 'out/' in file and 'png' in file:
        file_number = int(file.split('/')[1].split('.')[0])
        if file_number >= 1 and file_number <= 118:
            # 检查时间的最后一位是否为0
            if time[-1] == '0':
                print(f"{file_number} - 0")
                string_of_01 += '0'
            else:
                print(f"{file_number} - 1")
                string_of_01 += '1'

print(string_of_01)

# 二进制转ascii字符串

def binary_to_string(binary):
    result = ''
    for i in range(0, len(binary), 8):
        byte = binary[i:i+8]
        result += chr(int(byte,2))  #从二进制转为十进制
    # 忽略不可见字符
    result = ''.join([i if ord(i) > 31 and ord(i) < 127 else '' for i in result])
    return result

key_of_zip = binary_to_string(string_of_01)
print(key_of_zip)