Cigaes / multihash

compute hash functions on collections of files

multihash

multihash is a tool to compute various hashes on collections of files.

It is optimized for I/O-bound large files collections by computing the hashes in parallel and caching the results.

Supported hashes

• CRC-32
• MD5
• SHA-1
• SHA-256
• SHA-512

Features

• Parallel hashing.
• Cached results.
• Recursive exploration with JSON output of hashes and metadata.
• Hashing of the files in a tar archive.

Building

multihash requires GNU make, OpenSSL and the Berkeley DB library and a system compatible with Single Unix v4. It has been tested with GNU/Linux.

It does not use a configure script but supports the usual make variables: CFLAGS, LDFLAGS, LIBS, PREFIX, DESTDIR. Build options can be changed directly in the Makefile or passed to the make command-line:

make LDFLAGS=-L/opt/openssl/lib PREFIX=/opt/multihash DESTDIR=/tmp/install

Out-of-tree build is supported using the configure target. Options passed to that target are stored permanently in the local Makefile (except DESTDIR):

make -f ~/src/multihash/Makefile PREFIX=/opt/multihash configure

Copyright

Copyright (c) 2017 Nicolas George [e-mail]

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.