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Python drop-in replacement for md5sum and co.

Project description


Latest Version Supported Python versions License GHA status page Coverage Status


usage: hashsum [-h] [-a] [--tag] [-b | -t] [-c | -l] [--quiet]
               [--status] [--strict] [-w] [-m] [--version]
               [FILE [FILE ...]]

Compute and check message digest with different hash algorithms.
The sums are computed as described in [1].
When checking, the input should be a former output of this program.
The default mode is to print a line with checksum, a character
indicating input mode ('*' for binary, space for text), and name
for each FILE.


positional arguments:
  FILE                  name of file to process. If not specified,
                        or set to -, data are read form the
                        standard input

optional arguments:
  -h, --help            show this help message and exit
  -a , --algorithm      specify the hashing algorithm
                        (default: 'md5')
  --tag                 create a BSD-style checksum
  -b, --binary          read input data in binary mode
  -t, --text            read input data in text mode (default)
  -c, --check           read checksum(s) form FILE and check them
  -l, --list-algorithms
                        list available hashing algorithms
  -m, --multi-thread    perform I/O and hash computation in separate threads
                        (default=False). Can speed-up computation on large
                        files while it is not recommended for small files.
  --version             show program's version number and exit

  Options that are useful only when verifying checksums

  --quiet               don't print OK for each successfully
                        verified file
  --status              don't output anything, status code shows
  --strict              exit non-zero for improperly formatted
                        checksum lines
  -w, --warn            warn about improperly formatted checksum

Package testing

The recommended way to test the package is to use pytest:

$ python3 -m pytest -v

========================== test session starts ==========================
platform linux -- Python 3.9.5, pytest-6.0.2, py-1.10.0, pluggy-0.13.0
hashsum version:      1.4.0.dev0
Platform:             Linux-5.11.0-24-generic-x86_64-with-glibc2.33
Byte-ordering:        little
Default encoding:     utf-8
Default FS encoding:  utf-8
Default locale:       ('it_IT', 'UTF-8')
rootdir: /home/antonio/projects/hashsum, configfile: setup.cfg
plugins: hypothesis-5.43.3, remotedata-0.3.2, doctestplus-0.9.0,
        openfiles-0.5.0, flake8-1.0.6, filter-subpackage-0.1.1, cov-2.10.1
collected 26 items

tests/ PASSED       [  3%]
tests/ PASSED  [  7%]


tests/ PASSED      [100%]

========================== 26 passed in 0.29s ===========================

Please note that some basic system information that can be sued for bug reporting are also printed on the screen.

The default configuration for “pytest” is stored into the setup.cfg file in the root directory of the source package:

addopts = -p no:warnings -p no:logging

Alternatively it is possible to use:

$ python3 -m unittest -v tests/


The hashsum software is distribute under the terms of the “3-Clause BSD License” see LICENSE.txt file for details.

hashsum changelog

hashsum v1.4.1 (18/07/2021)

  • Fix the wheel generation: generated wheel are not universal, they only work with Python 3.6 and higher

hashsum v1.4.0 (18/07/2021)

  • Drop support for Python < 3.6.

  • Switch to GitHub Actions for CI.

  • Fix verification of checksums in text mode on Windows.

  • Re-factorize and simplify the test code.

  • Add buildsystem support (pyproject.toml)

  • Switch to declarative setup configuration (setup.cfg).

hashsum v1.3.0 (25/08/2019)

  • hashsum.VERSION renamed into hashsum.__version__

  • added test utility functions

  • prefer lowercase names for hash functions

  • improve robustness against unknown/unavailable hash functions in threaded checksum computation

  • new –failfast option added to the test CLI

  • improved benchmark script

  • man page updated

  • improved compatibility with pytest

hashsum v1.2.2 (15/11/2016)

  • Fix compatibility with the windows operating system

hashsum v1.2.1 (24/08/2016)

  • Minor packaging fixes

hashsum v1.2.0 (24/08/2016)

  • Improved compatibility with the OpenSSL command line tool

  • Better iteration on data blocks

  • Optional threaded hash computation

  • Refactoring: the entire code has been re-organized in tools

  • Drop all gettext related files

hashsum v1.1.1 (30/01/2016)

  • Include man pages in the tarball

hashsum v1.1 (30/01/2016)

  • Fixed IncrementalNewlineDecoder.decoder signature

  • Always call decode with final=True when reading in text mode

  • Factorized code for checksum computation

  • All Exceptions are now trapped in the main function

  • Added unit testing

  • Code cleanup

  • Added NEWS.rst file

  • Added man page

  • Improved command line help (also fixed some typos)

  • Enabled automatic testing with travis-ci

hashsum v1.0 (04/01/2016)

  • Initial release

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