stream wp 及近期学习
在做stream题目的时候 顺便学的东西
首先stream.exe文件，看图标 考虑python解包
解包后尝试寻找stream文件，并在PYZ-00.pyz_extracted文件中找到pyc文件，随便点开一个用hex打开找到前十六个字节 magic number
``` 6F 0D 0D 0A 00 00 00 00 00 00 00 00 00 00 00 00 ```将stream改后缀为stream.pyc 并将magic number 添加进去
然后尝试uncompyle6反编译stream.pyc文件，发现不行（uncompyle6 只能编译版本低的python 这是用python3.10写的，无法编译，后来发现可以在线。。。）
反编译后得出
import base64
def gen(key):
s = list(range(256))
j = 0
for i in range(256):
j = (j + s[i] + ord(key[i % len(key)])) % 256
tmp = s[i]
s[i] = s[j]
s[j] = tmp
i = j = 0
data = []
for _ in range(50):
i = (i + 1) % 256
j = (j + s[i]) % 256
tmp = s[i]
s[i] = s[j]
s[j] = tmp
data.append(s[(s[i] + s[j]) % 256])
return data
def encrypt(text, key):
result = ''
for c, k in zip(text, gen(key)):
result += chr(ord(c) ^ k)
result = base64.b64encode(result.encode()).decode()
return result
text = input('Flag: ')
key = 'As_we_do_as_you_know'
enc = encrypt(text, key)
if enc == 'wr3ClVcSw7nCmMOcHcKgacOtMkvDjxZ6asKWw4nChMK8IsK7KMOOasOrdgbDlx3DqcKqwr0hw701Ly57w63CtcOl':
print('yes!')
return None
None('try again...')
base64 加rc4（在线解也可）解得
标签：00,stream,text,学习,result,key,wp,256 From： https://www.cnblogs.com/fallrain/p/17146126.html