narfbg/CodeIgniter — comment on commit d465c539555163260b7403b36001b2156419ee1a
File: system/libraries/Encrypt.php line 508
By narfbg:

Well, I wasn't aware that it was deprecated, but at this point ... if `sha1()` and `mhash()` are not available - even if deprecated, it's still better than nothing. Or at least I think so ... this might be debated and the point of this pull request isn't to change that - I don't want it rejected because of it. Probably you can submit another request for that?

Anyways, thanks to your question I now noticed that `CI_SHA` should be `CI_SHA1` - that typo has probably been around for ages.