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zip-password-finder

Build Crates.io

zip-password-finder is a tool to find the password of protected zip files.

The design of this tool is described in details in the following blog articles:

Features

  • Supports both ZipCrypto and AES encryption.
  • Leverages multiple threads to speed up the process
  • Dictionary attack to test passwords from a dictionary text file (one word per line)
  • Brute force to generate all passwords for a given charset and a password length range

The available charsets for the password generation are:

  l | abcdefghijklmnopqrstuvwxyz [a-z]
  u | ABCDEFGHIJKLMNOPQRSTUVWXYZ [A-Z]
  d | 0123456789                 [0-9]
  h | 0123456789abcdef           [0-9a-f]
  H | 0123456789ABCDEF           [0-9A-F]
  s | «space»!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~

Alternatively, you can provide a custom charset file with the --charsetFile option.

It accepts a file path for a txt file containing a single line of characters to use for the password generation.

Installation

Releases

Using the provided binaries in https://github.com/agourlay/zip-password-finder/releases

Crates.io

Using Cargo via crates.io.

cargo install zip-password-finder

AUR

You can install zip-password-finder from the AUR using an AUR helper. For example:

paru -S zip-password-finder

Usage

./zip-password-finder -h
Find the password of protected ZIP files

Usage: zip-password-finder [OPTIONS] --inputFile <inputFile>

Options:
  -i, --inputFile <inputFile>                    path to zip input file
  -w, --workers <workers>                        number of workers
  -p, --passwordDictionary <passwordDictionary>  path to a password dictionary file
  -c, --charset <charset>                        charset to use to generate password [default: lud]
      --charsetFile <charsetFile>                path to a charset file
      --minPasswordLen <minPasswordLen>          minimum password length [default: 1]
      --maxPasswordLen <maxPasswordLen>          maximum password length [default: 10]
      --fileNumber <fileNumber>                  file number in the zip archive [default: 0]
  -h, --help                                     Print help
  -V, --version                                  Print version

Performance

For AES make sure to use a CPU with SHA instructions (Intel Sandy Bridge or newer, AMD Bulldozer or newer) to get the best performance.

Native builds tend to perform better in general.

RUSTFLAGS="-C target-cpu=native" cargo build --release

In general this tool seems to suffer from contention as the number of workers increases which makes it impractical for non-trivial passwords.

It makes sense to use a number of workers equal to the number of physical cores.

E.g. of scalability with an 8 core CPU with 16 threads as the number of workers increases:

scalability example