[openssl-users] OpenSSL SHA algorithm

[Swapnil Deshpande]

Hi all,

Noob here. I recently discovered that the "-sha1" and "-sha" flags in the
"openssl dgst" command produce different outputs. I thought those were the
same algorithms but turns out they are not:

$ echo -n "password" | openssl dgst -sha

80072568beb3b2102325eb203f6d0ff92f5cef8e


$ echo -n "password" | openssl dgst -sha1

5baa61e4c9b93f3f0682250b6cf8331b7ee68fd8


I am aware of SHA1 and the SHA-128 algorithm.


1. What algorithm is used to generate hash when I use the "-sha" option?

2. What could I have done to get this answer to #1 in a better way? I am
asking this because I tried to find what algorithm is being used through
the "help" option as well as trying to search via "man openssl" but
couldn't find anything. I also did a basic search for "openssl sha vs sha1"
and couldn't find any relevant results. If there was a better way to know
more about this option (say by reading some documentation), I'd be glad to
know about it.


Merry Christmas.


Regards,

Swapnil
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mta.openssl.org/pipermail/openssl-users/attachments/20171225/e4ec46ff/attachment.html>