B2SUM

Utility to calculate BLAKE2 checksums written in Go.

Note: The original utility available from https://blake2.net is faster.

Installation

Download binary for your platform by clicking on the Downloads item in the top menu, unzip it and put into your PATH.

Available platforms: OS X (darwin), Linux, FreeBSD, Windows.

To install from source, if you have Go installed:

$ go get bitbucket.org/dchest/b2sum

Usage

b2sum [-a=HASH] [-s=SIZE] [filename1] [filename2] ...

Supported HASHes: blake2b, blake2s.

If no filenames specified, reads from the standard input.

Examples

$ echo -n "Hello world" | b2sum
6ff843ba685842aa82031d3f53c48b66326df7639a63d128974c5c14f31a0f33343a8c65551134ed1ae0f2b0dd2bb495dc81039e3eeb0aa1bb0388bbeac29183

$ echo -n "Hello world" | b2sum -s=20
5ad31b81fc4dde5554e36af1e884d83ff5b24eb0

$ b2sum -s=32 /bin/sh /etc/bashrc 
BLAKE2b-32 (/bin/sh) = 376f70f4acc6e204ed9d098ce0e93798cb7ed1b047686872c7f496d02364c85c
BLAKE2b-32 (/etc/bashrc) = 1572d4fe68a18bae127fe79fa5d009fdb2e3357c238f722109012fa739aaacb7

$ b2sum -s=20 FreeBSD-9.0-RELEASE-amd64-disc1.iso
BLAKE2b-20 (FreeBSD-9.0-RELEASE-amd64-disc1.iso) = 4174862a104245d26b61315b80af92892f4a45f2

$ b2sum -a=blake2s LICENSE
BLAKE2s-32 (LICENSE) = c34533c95c63606f33b644eec52e58a3189aa65e133755b0ebec7a32d90d5736

Packages

Pure Go implementations of BLAKE2 to use in your applicaitons:

• BLAKE2b - https://github.com/dchest/blake2b
• BLAKE2s - https://github.com/dchest/blake2s