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.