Am Montag, 5. November 2018, 11:20:28 CET schrieb Ard Biesheuvel: Hi Ard, Gilad, > On 5 November 2018 at 10:18, Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx> wrote: > > Hi Stephan, > > > > On Mon, Nov 5, 2018 at 10:50 AM Stephan Mueller <smueller@xxxxxxxxxx> wrote: > >> Am Sonntag, 4. November 2018, 11:05:24 CET schrieb Gilad Ben-Yossef: > >> > >> Hi Gilad, > >> > >> > As per Sp800-38A addendum from Oct 2010[1], cts(cbc(aes)) is > >> > allowed as a FIPS mode algorithm. Mark it as such. > >> > > >> > [1] https://csrc.nist.gov/publications/detail/sp/800-38a/addendum/final > >> > >> There are several types of CTS approaches. Only three of those are listed > >> in the SP800-38A addendum. The source code only refers to some RFCs. > >> > >> Did you check whether the CTS implementation matches one or more of the > >> types listed in the addendum? If yes, may I suggest to add a small > >> statement in the code noting this fact? > > > > Yes, AFAIK the software implements CBC-CS3 as described in the document. > > You have a very good point about this not document anywhere. I will > > send a patch. > > I agree that it makes sense to document this. Thanks for adding this. With this statement, the initial patch of adding the fips_allowed flag is: Reviewed-by: Stephan Mueller <smueller@xxxxxxxxxx> Ciao Stephan
