Hi,
Wikipedia has some information.
https://en.wikipedia.org/wiki/Secure_Hash_Algorithms
What is produced by "dgst -sha" is what the above link is calling SHA-0
(originally just called SHA).
All the best,
-Dave
> On Dec 25, 2017, at 22:44, Swapnil Deshpande <swapnilddeshpa...@gmail.com>
> wrote:
>
> 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
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