[openssl-users] OpenSSL SHA algorithm

[Dave Coombs]

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 <swapnilddeshpande at 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
> -- 
> openssl-users mailing list
> To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mta.openssl.org/pipermail/openssl-users/attachments/20171226/e9633276/attachment.html>