On 2020-10-20, at 03:15, Michael Richardson <[email protected]> wrote: > > I believe we use the term bag because it is permissible for a certificate > artifact to appear more than once. Stupid maybe, but permissible. > > I think that some systems/libaries considered the Issuer/Subject to be the > key for indexing the set, and then they got confused if there was more than > one certificate in the bag. The additional object used a different signature > and/or hash. At least, I have some dim memory of some situation being > described to me. I think that the names of the guilty parties were withheld.
I think we have a different perception of what “is” means. In my shopping bag, there *is* a difference between having one or two yoghurts in there. In the x5bag, having the same certificate twice is exactly equivalent to having it once. So it “is” a (non-empty) set, not a bag, even if the *representation* (as an array, with a special case for the singleton) can actually have duplicates. Given the semantics, the question how one “finds” things in that set is more of an implementation question. I don’t think offering this as a multimap(*) with some arbitrarily chosen map key is flexible enough. Normally, a simple iterator (so you get to see any and all of the elements) will be the best solution, because the implementation cannot know what the application-specific validation process is looking for, and we are talking about a very small set. Grüße, Carsten (*) Cannot be a map, as there is no guarantee of uniqueness of any key. _______________________________________________ COSE mailing list [email protected] https://www.ietf.org/mailman/listinfo/cose
