Hi Rikard, Sorry for the late reply. Thank you for the information.
I could not find any countersigning implementations so this is very useful for me. But it seems to me that they are all based on the old specification (RFC8152). I am looking for an implementation that conforms to the new one (RFC9052). Anyway, thanks a lot! Best, Daisuke 2023年1月16日(月) 18:39 Rikard Höglund <[email protected]>: > Hello. > > The Group OSCORE protocol being defined in [1] uses COSE countersignatures > for ensuring source authentication of messages. I have been working on an > implementation of Group OSCORE which is available at [2]. This > implementation uses CounterSignature0. For practically performing the > countersigning it relies on a COSE library in Java which can be found at > [3]. > > [1] https://datatracker.ietf.org/doc/draft-ietf-core-oscore-groupcomm/ > [2] https://github.com/rikard-sics/californium/tree/group_oscore > [3] https://github.com/cose-wg/COSE-JAVA > > There are also a number of other implementations of Group OSCORE which use > CounterSignature0 (possibly relying on external libraries). I list some of > these below: > https://github.com/chrysn/aiocoap > https://github.com/mrdeep1/libcoap/commits/oscore_group > https://gitlab.informatik.uni-bremen.de/obergman/libcoap/-/tree/oscore > https://github.com/Gunzter/contiki-ng > > Perhaps some of this can be relevant to look at. > > Best > Rikard Höglund > RISE > > > > AJITOMI Daisuke <[email protected]> > > Hi all, > > > > Does anyone know of any OSS that implements the COSE countersigning? > > There are no test vectors, so I would like to see if there is a reference > > implementation. > > > > Best regards, > > Daisuke > >
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