回应模式 - No.65410556


No.65410556 - 技术宅


无标题无名氏No.65410556 只看PO

2025-03-01(六)17:25:47 ID:pNj9ofX 回应

小白求助
有个网上的福利资源被上传者象征性加了密且放了加密方式,但我不会写解密脚本,
以下是上传者的说明文档:

第一个分卷已使用AES加密。您需要使用ECB/PCKS5Padding进行解密。解密脚本请自行编写。
密钥为字符串Hello World的32位md5小写值。
解密后文件的md5为3392f54ea7dbcd0c51a18b48411d6283
解密后正常打开7z文件,密码为字符串Hello World的sha256摘要(也是小写)
如此便可完全解压文件。


其中第一个秘钥我通过在线转换得到是b10a8db164e0754105b7a99be72e3fe5
第二个是a591a6d40bf420404a011733cfb7b190d62c65bf0bcda32b57b277d9ad9f146e

但我卡在第一步了|д` )
要对这个文件进行解密,需要做一个怎样的东西呢?
jp

无标题无名氏No.65412376

2025-03-01(六)21:22:59 ID: EMFijL4

>>No.65411573
一样也可以问deepseek,一般就是pip install -r requiments.txt && python main.py

无标题无名氏No.65412449

2025-03-01(六)21:28:21 ID: EMFijL4

白嫖的deepseek好像出了点问题,问的Claude3.5,大差不差

I understand you need help decrypting a file that's been encrypted with AES. Based on the instructions, here's what you need to do:

First, let me plan how to approach this:
1. Create a script to decrypt the AES-encrypted first volume
2. Use ECB mode with PKCS5Padding
3. Use the MD5 hash of "Hello World" as the key
4. After decryption, verify the MD5 hash matches the expected value
5. The resulting file is a 7z archive that needs a password (SHA256 hash of "Hello World")


```python
from Crypto.Cipher import AES
from Crypto.Util.Padding import unpad
import hashlib
import os

def md5(string):
"""Calculate MD5 hash of a string and return lowercase hex digest."""
return hashlib.md5(string.encode('utf-8')).hexdigest()

def sha256(string):
"""Calculate SHA256 hash of a string and return lowercase hex digest."""
return hashlib.sha256(string.encode('utf-8')).hexdigest()

def decrypt_file(input_file, output_file, key):
"""Decrypt a file using AES-ECB with PKCS5Padding."""
# Create AES cipher in ECB mode
cipher = AES.new(bytes.fromhex(key), AES.MODE_ECB)

# Read encrypted data
with open(input_file, 'rb') as f:
encrypted_data = f.read()

# Decrypt and unpad
decrypted_data = unpad(cipher.decrypt(encrypted_data), AES.block_size)

# Write decrypted data
with open(output_file, 'wb') as f:
f.write(decrypted_data)

def verify_md5(file_path, expected_md5):
"""Verify the MD5 hash of a file."""
with open(file_path, 'rb') as f:
file_md5 = hashlib.md5(f.read()).hexdigest()

print(f"Generated MD5: {file_md5}")
print(f"Expected MD5: {expected_md5}")

return file_md5 == expected_md5

def main():
# File paths
encrypted_file = input("Enter path to encrypted file: ")
decrypted_file = input("Enter path for decrypted output file: ")

# Generate the keys from "Hello World"
aes_key = md5("Hello World") # 32-bit (16-byte) MD5 hash
archive_password = sha256("Hello World")

print(f"AES Key (MD5): {aes_key}")
print(f"Archive Password (SHA256): {archive_password}")

# Decrypt the file
try:
decrypt_file(encrypted_file, decrypted_file, aes_key)
print(f"Decryption completed: {decrypted_file}")

# Verify MD5 hash
expected_md5 = "3392f54ea7dbcd0c51a18b48411d6283"
if verify_md5(decrypted_file, expected_md5):
print("MD5 verification successful!")
print("\nNext steps:")
print(f"1. Open the decrypted 7z file using your archive program")
print(f"2. When prompted for password, use: {archive_password}")
else:
print("Warning: MD5 verification failed. The file may not be decrypted correctly.")
except Exception as e:
print(f"Error during decryption: {e}")

if __name__ == "__main__":
main()

```


要使用这个脚本,您需要先安装 pycryptodome 库:

```
pip install pycryptodome
```

使用方法:
1. 将上面的代码保存为 `decrypt.py`
2. 在命令行中运行 `python decrypt.py`
3. 按照提示输入加密文件的路径和要保存解密文件的路径
4. 脚本会自动使用 "Hello World" 的 MD5 值作为密钥进行解密
5. 解密后,脚本会验证文件的 MD5 是否匹配预期值
6. 最后,您可以使用 "Hello World" 的 SHA256 值作为密码打开解密后的 7z 文件

您提供的密钥看起来是正确的:
- AES 密钥: b10a8db164e0754105b7a99be72e3fe5
- 7z 密码: a591a6d40bf420404a011733cfb7b190d62c65bf0bcda32b57b277d9ad9f146e

需要什么其他帮助吗?

无标题无名氏No.65412468

2025-03-01(六)21:30:12 ID: xTxdj0F

https://jupyter.org/try-jupyter/lab?path=notebooks%2FIntro.ipynb
纯网页版的Python环境,甚至能用numpy(*゚∀゚*)

无标题无名氏No.65412553

2025-03-01(六)21:40:28 ID: ORSXS0B

资源呢?( `д´)

无标题无名氏No.65414161

2025-03-02(日)00:35:26 ID: okMa1N0

说实话它家的图我还挺喜欢的,不露但是很色

无标题无名氏No.65417753

2025-03-02(日)15:59:14 ID: pNj9ofX (PO主)

>>No.65412468
为什么打开之后是全空白的页面呢……

无标题无名氏No.65417759

2025-03-02(日)16:00:23 ID: pNj9ofX (PO主)

>>No.65417753
没事了,,我网络问题
开着梯子就能看见了

无标题无名氏No.65417961

2025-03-02(日)16:32:29 ID: pNj9ofX (PO主)

复制了>>No.65412449的代码保存为py文件
然后用>>No.65412468的网页环境试着运行,但不知道要怎么做(つд⊂)

无标题无名氏No.65418173

2025-03-02(日)17:02:15 ID: 8hxlYPV

>>No.65417961
(╬゚д゚)你这没用的东西,你对得起你的鸡鸡吗?
昨天搞到现在还没让它快乐。

去安装Python,找不到就搜腾讯软件商店,在里面搜索Python,选普通下载,然后把decrypt.py和加密文件放在d盘,在d盘文件管理界面,按shift➕鼠标右键,打开命令行
输入python decrypt.py
输入要解密的文件名,回车
输入要输出的文件名,回车