https://github.com/phith0n/PaddingZip

PaddingZip is a tool that you can craft a zip file that contains the padding characters between the file content.
https://github.com/phith0n/PaddingZip

Last synced: 21 days ago
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PaddingZip is a tool that you can craft a zip file that contains the padding characters between the file content.

• Host: GitHub
• URL: https://github.com/phith0n/PaddingZip
• Owner: phith0n
• License: mit
• Created: 2022-01-27T15:16:58.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2022-08-14T18:38:48.000Z (over 2 years ago)
• Last Synced: 2024-11-19T22:50:59.722Z (22 days ago)
• Language: Python
• Size: 182 KB
• Stars: 62
• Watchers: 2
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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• awesome-hacking-lists - phith0n/PaddingZip - PaddingZip is a tool that you can craft a zip file that contains the padding characters between the file content. (Python)

README

        
# PaddingZip 

PaddingZip is a tool that you can craft a zip file that contains the padding characters between the file content.

A normal zip file:

![](2.png)

A craft but valid zip file:

![](3.png)

For example, you can craft a valid JAR file using PaddingZip:

![](1.png)

## Usage

```shell

$ python paddingzip.py -h

usage: paddingzip.py [-h] -i INPUT_FILENAME -o OUTPUT_FILENAME [-p PREPEND] [-a APPEND]

A tool that you can craft a zip file that contains the padding characters between the file content

optional arguments:

  -h, --help            show this help message and exit

  -i INPUT_FILENAME, --input INPUT_FILENAME

  -o OUTPUT_FILENAME, --output OUTPUT_FILENAME

  -p PREPEND, --prepend PREPEND

                        the characters that you want to prepend to the file beginning

  -a APPEND, --append APPEND

                        the characters that you want to append to the file

```

For example:

```shell

python paddingzip.py -i original.jar -o modify.jar --prepend "this prepend to the start" --append "this append to the end"

```

## `zip -F`

You also can use `zip -F` to fix the offset:

```shell

$ echo -n "prepend" > f

$ cat f a.zip > b.zip

$ zip -F b.zip --out c.zip

```

## License

MIT License