> On 26 Aug 2021, at 16:59, Peter Eisentraut <peter.eisentraut@xxxxxxxxxxxxxxxx> wrote: > On 26.08.21 10:40, Daniel Gustafsson wrote: >> Wouldn’t the difference in possible error messages in upper/lower be able to >> leak whether the input is ascii or wide chars, and/or the collation? > > Yeah, but there aren't any error messages that relate to the argument string, if you look through the code. There isn't any "could not find lower case equivalent of %s" or anything like that. Correct. My reading of "It reveals no information about its arguments other than by its return value” was that errormessages indicating different code- paths based on argument structure weren't allowed. That might have been a bit too lawyery interpretation though. -- Daniel Gustafsson https://vmware.com/
