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Python CRC32 Hasher

Introduction

Python CRC-32 Hasher is a console utility for calculating and verifying various types of hash from any files (CRC-32, MD4, MD5, SHA1, SHA256, SHA512, ED2K). A recommended usage is putting it in your file manager context menu, as I put it in a custom action in Thunar.

Features

  • Optimised for fansub releases: It automatically reads CRC-32 hashes from filenames and compares with the actual hash to verify files' integrity. Adding CRC-32 hashes to filenames automatically is supported.
  • Output in a predefined formats (only sfv currently).
  • Supports filename patterns (* and ?) even when working with terminal that doesn't.
  • Ability to process directories recursively.
  • Portability: the program works the same under any platform as long as Python is installed (Linux, *BSD, Solaris, Mac OS, or Windows).
  • Written in Python, small in size, fast, open source.

Requirements

  • Python 2.7+, or 3.3+ [recommended]
  • A terminal

Usage

Syntax: python crc32.py [options] inputs

Input can be individual files, and/or folders. Use * (any string), ? (one character) for the filename pattern.

Options:

  • --addcrc: Adds CRC to filenames
  • --updatecrc: Updates CRC to filenames
  • -c out.sfv or --createsfv out.sfv: Creates a SFV file
  • -r or --recursive: Also includes sub-folder
  • -s or --searchsubfolder : Also search sub-folder for matching filenames
  • --hashtype: Enable the specified hash type. Currently supported hash types: CRC-32, MD4, MD5, SHA-1, SHA-256, SHA-512, ED2K. Please use lowercase and no hyphen for hash types. CRC-32 is enabled by default and can't be disabled.
  • -m or --most: Enable CRC-32, MD5, SHA-1, SHA-256, SHA-512, and ED2K.
  • -a or --all: Enable all supported hashes.
  • -i or --inputs: Treat all remaining paramenters as filenames.

Examples:

  • python crc32.py "/home/yumi/Desktop/[FFF] Unbreakable Machine-Doll - 11 [A3A1001B].mkv"
  • python crc32.py --md5 --sha1 ~/Desktop ~/Downloads/*.mkv "/var/www/upload/Ep ??.mkv"
  • python crc32.py --sha512 --ed2k -c checksums.sfv -s --addcrc /var/www/upload/*.mp4

Todo

  • Import/Export list of hashes.
  • Setting file.
  • Multi-thread support. Probably a dedicated thread for each hash type.
  • SHA3 support.

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