zipwalk

A CLI tool to parse damaged zip files.

Build and install

mkdir build
cd build
# default value of ${CMAKE_INSTALL_PREFIX} is "/usr/local"
cmake ../src # cmake -DCMAKE_INSTALL_PREFIX=~/.local/ ../src/
make # compile
make install # install zipwalk to ${CMAKE_INSTALL_PREFIX}/bin/zipwalk

to uninstall, just delete the file: rm zipwalk

Arch User

yay -Sy zipwalk

Run

• zipwalk: ./zipwalk -f ../samples/123.zip
• test-my_inflate: ./test/test-my_inflate ../samples/123.deflate 123.txt

getopt

• ./zipwalk
• -t --target_directory, where to put the extracted files
• -f --file zipfile path
• -v --version print version number
• -h --help print usage
• -s --save-file save files
• -e --extension parse file as a zip/gzip/tar, ignore the suffix of filename

Thinking / TODO

• in local file header, filename: folders? files? -- check whether ends with '/' or not
• date & time
• base folder
• zip32/zip64
• getbyte, getword, getdword, getqword(little endian ?)
• human readable? -h
• mkdir, recursively
• file / folder
• other compression method
  • stored
  • deflate
• summary info
• encrypted ?
• .gz/.tar.gz files
  • determine format of a file by its filename
  • or one more argument -e --extension zip, tar, gzip
  • .tar.gz .tgz .gz: do un-gzip, save file to .tar
  • .tar: do un-tar

Refs

• wiki: ZIP (file format)
• ZIP压缩算法详细分析及解压实例解释 详细，从哈夫曼到deflate
• zip文件结构
• zip文件解析
• rfc1951 (deflate format)