文件的二进制数据作为变量存储在Python文件中

发布于 2024-10-16 11:35:25 字数 541 浏览 0 评论 0原文

假设有program.exe，我将创建一个python脚本，它将

以二进制模式读取program.exe并将其保存在变量数据中，
以二进制附加模式打开mypytonprog.py，
将数据附加到mypythonprog.py（？）

在此之前，mypythonprog .py 将准备为：

program_data='''

在它之后，mypythonprog.py 将继续为：（

'''
programs continues....

我想以某种方式将该程序代码放入 program_data 变量中）

当然，这不工作，但是可以吗以某种方式完成？我想要的基本上是： mypythonfile.py 能够创建一个 exe 文件，其中存储了二进制数据。

我想我必须将该数据编码为 shellcode，以便能够将其放入 mypythonfile.py 中，
正确的？

原文

Lets say a have program.exe , i will create a python script that will

read program.exe in binary mode and save it in variable data
open mypytonprog.py in binary append mode
append data to mypythonprog.py (?)

before this, mypythonprog.py would be prepared as:

program_data='''

after it, mypythonprog.py would continue as:

'''
programs continues....

(i want somehow to put that program code into a program_data variable)

This, does not work,of course, but can it be done in some way ?
What i want basicly is: mypythonfile.py to be able to create an exe file with binary data stored inside it.

I suppouse i have to encode that data to a shellcode to by able to put it inside mypythonfile.py,
right ?

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你曾走过我的故事 2024-10-23 11:35:25

>>> 'some binary data'.encode('base64')
'c29tZSBiaW5hcnkgZGF0YQ==\n'
>>> 'c29tZSBiaW5hcnkgZGF0YQ==\n'.decode('base64')
'some binary data'

>>> 'some binary data'.encode('base64')
'c29tZSBiaW5hcnkgZGF0YQ==\n'
>>> 'c29tZSBiaW5hcnkgZGF0YQ==\n'.decode('base64')
'some binary data'

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折戟 2024-10-23 11:35:25

import base64

exe = 'c:/users/me/program.exe'
script = 'c:/users/me/newpython.py'
chunksize = 6144
linelength = 80

with open(exe,'rb') as inf, open(script,'w') as outf:
    outf.write('program_data = """')

    while True:
        progdata = inf.read(chunksize)
        if len(progdata):
            progdata = progdata.encode("base64")
            outf.writelines(progdata[i:i+linelength] for i in range(0, len(progdata), linelength))
        else:
            break

    outf.write('""".decode("base64")')

编辑：

这个想法是以方便的块的形式处理输入文件，而不是将可能很大的文件读入内存。

对块进行 base64 编码后，我将其拆分为 80 个字符的行（这基本上只是为了使其在文本编辑器中易于管理）并将其写入输出。

我将数据包装在program_data = """ .. """.decode("base64") 中，这样当Python 加载文件时，数据将被自动解密——program_data 将包含您想要的二进制数据。

8096 是个脑残——我本来打算使用 8192 字节 (8KB)。然后我意识到还有第二个问题；对长度不是 3 个字符的倍数的块进行编码会导致“=”填充输出，从而过早地截断解码。我已将块大小更改为 6KB = 512 字节（默认 NTFS 块大小）* 3 个字符* 4（任意倍数）；这似乎按预期工作。

希望有帮助！

import base64

exe = 'c:/users/me/program.exe'
script = 'c:/users/me/newpython.py'
chunksize = 6144
linelength = 80

with open(exe,'rb') as inf, open(script,'w') as outf:
    outf.write('program_data = """')

    while True:
        progdata = inf.read(chunksize)
        if len(progdata):
            progdata = progdata.encode("base64")
            outf.writelines(progdata[i:i+linelength] for i in range(0, len(progdata), linelength))
        else:
            break

    outf.write('""".decode("base64")')

Edit:

The idea is to process the input file in convenient chunks rather than reading a potentially-huge file into memory.

After base64-encoding the chunk, I then split it into 80-char lines (this is basically just to keep it manageable in the text editor) and write it to output.

I wrap the data in program_data = """ .. """.decode("base64") such that when Python loads the file, the data will be automatically decrypted - program_data will contain the binary data you desire.

8096 was a brain fart - I meant to use 8192 bytes (8KB). Then I realized there was a second problem; encoding a chunk other than a multiple of 3 chars long results in '='-padded output, which prematurely truncates decoding. I have changed the chunk size to 6KB = 512 bytes (default NTFS block size) * 3 chars * 4 (arbitrary multiple); this seems to work as expected.

Hope that helps!

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