> -----Oorspronkelijk bericht----- > Van: otr-users-boun...@lists.cypherpunks.ca [mailto:otr-users- > boun...@lists.cypherpunks.ca] Namens Ian Goldberg > Verzonden: Thursday, July 2, 2015 2:13 PM > Aan: otr-users@lists.cypherpunks.ca > Onderwerp: Re: [OTR-users] otr modify toolkit > > On Tue, Jun 30, 2015 at 02:03:59AM +0200, Bjorn Kuiper wrote: > > > > Wouldn't the mackey be the key that I can retrieve using > > > > otr_parse, > > thus: > > > > 8dfd40e19d32e778410200de0235a5787e294216 ? > > > > > > No, that's the MAC tag, not the MAC key. > > > > > > > Or would it be the mackey that I would retrieve when > > > > re-establishing a new DH key and get it from the list of old mackeys? > > > > > > Indeed. There are two ways to get the MAC key. One is if you know > > > the private part of a DH key, in which case you can use otr_sesskeys > > > to get > > it. > > > The other is if you have a transcripts containing later messages > > > that > > contain > > > this key as an "old mackey", which you get with otr_parse. > > > > > > - Ian > > > > So consider the attached private key pidgin file, the private key of > > __bob would be "2E3342837ACFB215EF502845CB48BB724762B950" > > You can't find the private DH key in any file; that would defeat the forward > secrecy property of OTR. You've got the private DSA key there instead. >
Thank you. I got it working. Here is a working example. Message: hi alice Encrypted message: ?OTR:AAIDAAAAAAEAAAABAAAAwDjO4gildvUsAA5n4+BJhGnJBj+PzS6RUhWxyY9OL/7juxInO1e Aq6yxb5WmFnsP0CTezw3t0iekfQJ2o8s9bmi6ON72TEYSCRJJUkR3mhtGP0sm5G67sSvmLOIEJ0n RKDZFN3wpYE29I4qNEzsph620KsOsOiaCG8+8GYXa4o7jlPHE0HAKgxUg/XkbrCFEAsqBFEMzLRW jusTuhFY1jZCaBUcgheA5cSfzG0iNLmeTroZ3VjQVfM79RUh4HClVdwAAAAAAAAABAAAACX9Ka0E QUka5WtEBF4hzVyBKG4cupxdEoqB/JxsiAAAAAA==. Revealed MAC key: 99ed1ef9b0a5f4c6755fbd9a1271064a71ce2ce5 Using otr_modify $ ./otr_modify.exe 99ed1ef9b0a5f4c6755fbd9a1271064a71ce2ce5 alice bjorn 3 ?OTR:AAIDAAAAAAEAAAABAAAAwDjO4gildvUsAA5n4+BJhGnJBj+PzS6RUhWxyY9OL/7juxInO1e Aq6yxb5WmFnsP0CTezw3t0iekfQJ2o8s9bmi6ON72TEYSCRJJUkR3mhtGP0sm5G67sSvmLOIEJ0n RKDZFN3wpYE29I4qNEzsph620KsOsOiaCG8+8GYXa4o7jlPHE0HAKgxUg/XkbrCFEAsqBFEMzLRW jusTuhFY1jZCaBUcgheA5cSfzG0iNLmeTroZ3VjQVfM79RUh4HClVdwAAAAAAAAABAAAACX9Ka0E QUka5WtEBF4hzVyBKG4cupxdEoqB/JxsiAAAAAA==. ?OTR:AAIDAAAAAAEAAAABAAAAwDjO4gildvUsAA5n4+BJhGnJBj+PzS6RUhWxyY9OL/7juxInO1e Aq6yxb5WmFnsP0CTezw3t0iekfQJ2o8s9bmi6ON72TEYSCRJJUkR3mhtGP0sm5G67sSvmLOIEJ0n RKDZFN3wpYE29I4qNEzsph620KsOsOiaCG8+8GYXa4o7jlPHE0HAKgxUg/XkbrCFEAsqBFEMzLRW jusTuhFY1jZCaBUcgheA5cSfzG0iNLmeTroZ3VjQVfM79RUh4HClVdwAAAAAAAAABAAAACX9Ka0I WVFeyWhnnXhTcl/k1RH2crMBk21qimPfSAAAAAA==. Greetings Bjorn _______________________________________________ OTR-users mailing list OTR-users@lists.cypherpunks.ca http://lists.cypherpunks.ca/mailman/listinfo/otr-users
