How can I generate SHA3 if there is no sha3sum command in coreutils?

Question

I have sha1sum or sha512sum on an average Linux distro.

But where is the sha3sum command that can generateSHA-3 commands?

Solution 1

You can use OpenSSL to do this. Run openssl list -digest-algorithms to get a list of algorithms:

...
SHA3-224
SHA3-256
SHA3-384
SHA3-512
...

As you can see sha3-{224,256,384,512} is supported by OpenSSL 1.1.1 (11 Sep 2018) from Ubuntu 18.10. You can also run openssl interactively:

OpenSSL> help
...
Message Digest commands (see the `dgst' command for more details)
blake2b512        blake2s256        gost              md4               
md5               rmd160            sha1              sha224            
sha256            sha3-224          sha3-256          sha3-384          
sha3-512          sha384            sha512            sha512-224        
sha512-256        shake128          shake256          sm3

To checksum a file:

openssl dgst -sha3-512 /bin/echo
SHA3-512(/bin/echo)= c9a3baaa2aa3d667a4ff475d893b3e84eb588fb46adecd0af5f3cdd735be88c62e179f98dc8275955da4ee5ef1dc7968620686c6f7f63f5b80f10e43bc1f00fc

To checksum a string:

printf "foobar" | openssl dgst -sha3-512

You can change the output format with these options:

• -c Print out the digest in two digit groups separated by colons
• -r Output the digest in the "coreutils" format, including newlines

Solution 2

There are a number of implementations, e.g. Mattias Andrée's sha3sum, or the Perl Digest-SHA3 module. In Debian, install libdigest-sha3-perl; in Fedora, install sha3sum; both of these will provide a sha3sum command based on the Perl module, which behaves in the same way as the binaries you're used to.

Solution 3

RHash application could do it:

rhash --sha3-256 yourfile

More info: rhash -h

it will work on Linux, BSD and Windows

Solution 4

For what it's worth, Busybox has had code for it since 2013.

Solution 5

If you're lazy like me and are used to md5sum, sha1sum, sha256sum:

Create the file /usr/local/bin/sha3256sum and make it executable with chmod +x sha3256sum.

#!/bin/bash
rhash --sha3-256 $1

Then you can run:

sha3256sum file

View more solutions

Comments

[pepite]

updating the question, sha384 is sha2. sha3 is not sha2.

[Patrick Mevzek]

yes indeed, sorry for my mistake. Support for SHA3 in openssl is planned/in the work : github.com/openssl/openssl/issues/439

[Stephen Kitt]

Welcome! While this is a useful answer, it would be better if you indicated that you are the author of this particular sha3sum implementation.

[leberknecht]

Note, for all the people who are using echo with this and are wondering why they cant get correct results: ensure to pass -n to avoid the newline-pitfall

[lebed2045]

I've tried "printf "foobar" | openssl dgst -sha3-512", got unknown option '-sha3-512'. openssl LibreSSL 2.8.3

[Smeterlink]

@lebed2045 LibreSSL does not support SHA-3.

[telcoM]

But since the final SHA3 specification was not released by NIST until August 5 2015, Busybox's implementation must have been based on preliminary versions of the spec... and so Busybox needed a fix in 2016 in order to conform to the final version of the SHA3 algorithm specification.

[Cristian Ciupitu]

@lebed2045 LibreSSL issue for adding support for SHA-3