On Mon, Dec 25, 2017 at 07:44:58PM -0800, Swapnil Deshpande 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? It's the original SHA algorithm, which people will now refer to as SHA-0. It has some minor but important changes compared to SHA-1. > 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. I started a pull request: https://github.com/openssl/openssl/pull/4979 There are probably other changes that should happen. Kurt -- openssl-users mailing list To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users
