XSF Discussion - 2019-06-25

00:02:13 Kacper has left
00:34:50 lumi has left
00:43:20 frainz has left
00:43:57 frainz has joined
01:17:10 Lance has joined
01:22:07 APach has left
01:32:05 lskdjf has left
01:39:24 mimi89999 has joined
02:00:54 neshtaxmpp has left
02:00:56 neshtaxmpp has joined
02:26:44 alacer has joined
02:53:10 alacer has left
02:53:12 alacer has joined
02:58:38 pdurbin has joined
03:03:22 alacer has left
03:03:31 alacer has joined
03:10:37 sezuan has joined
03:19:28 alacer has left
03:23:46 alacer has joined
03:32:57 andy has joined
03:37:33 waqas has left
03:48:02 UsL has joined
04:01:25 karoshi has joined
04:12:39 adityaborikar has joined
04:13:07 adityaborikar has left
04:13:32 adityaborikar has joined
04:35:40 Nekit has joined
04:38:45 APach has joined
04:43:26 Yagiza has joined
04:49:40 Yagiza Daniel, are you here?
04:52:38 COM8 has joined
04:55:12 Daniel has left
04:57:21 wurstsalat has left
05:02:13 COM8 has left
05:02:19 COM8 has joined
05:02:56 COM8 has left
05:04:21 APach has left
05:12:55 APach has joined
05:13:57 Daniel has joined
05:26:51 alacer has left
05:27:40 alacer has joined
05:30:07 alacer has left
05:30:18 alacer has joined
05:30:27 Daniel Yagiza: yes
05:33:32 Yagiza Daniel, I need to clarify something about OMEMO implementation. Can you help me?
05:34:20 COM8 has joined
05:34:33 COM8 has left
05:35:01 sezuan has left
05:35:28 andy has left
05:36:54 andy has joined
05:41:44 Daniel Yagiza: I don't know. But we can try
05:43:23 Yagiza Daniel, ok, thanx!
05:51:08 igoose has left
05:51:13 igoose has joined
06:00:29 lnj has joined
06:06:15 Lance has left
06:09:42 valo has left
06:10:57 valo has joined
06:13:37 COM8 has joined
06:13:44 COM8 has left
06:15:00 APach has left
06:15:13 APach has joined
06:22:55 Yagiza Section 4.3 says, that I must publish my IdentityKey. But IdentityKey is a public/private key pair.
06:23:52 igoose has left
06:25:41 Yagiza Do I need to publish both keys, or just public one?
06:27:30 Daniel The public key
06:27:57 APach has left
06:38:51 sezuan has joined
06:40:10 Yagiza Daniel, ok. That's the way I did it.
06:41:01 Yagiza Daniel, the only question is why tag name is so ambiguous.
06:42:23 Yagiza <signedPreKeyPublic/>, <preKeyPublic/>, but <identityKey/>?
06:43:49 Yagiza The next question is about section 4.5.
06:46:55 Yagiza It says: "In order to send a chat message, its <body> first has to be encrypted. The client MUST use fresh, randomly generated key/IV pairs with AES-128 in Galois/Counter Mode (GCM). The 16 bytes key and the GCM authentication tag (The tag SHOULD have at least 128 bit) are concatenated and for each intended recipient device, i.e. both own devices as well as devices associated with the contact, the result of this concatenation is encrypted using the corresponding long-standing SignalProtocol session."
06:47:57 Yagiza What does that mean? How to encrypt, "using the corresponding long-standing SignalProtocol session"?
06:49:44 goffi has joined
06:50:03 Yagiza Do I need to use one of pre keys, published by target devices to encrypt key I just generated?
06:52:00 Yagiza Or do I need to use it just for a first message and mark it with preKey="true" attribute?
06:53:16 Yagiza And one I received a key/IV pair from the device, I need to use that key instead?
06:55:46 APach has joined
06:57:16 flow dwd, hmm?
06:58:13 dwd flow, You referred to SCE as SEC in your mail to standards@. I'm disproportionately amused.
06:59:31 flow Ahh, I see.
06:59:32 Daniel Yagiza: you generate a random iv+key, encrypt the message with that key. And then you feed the key into all signal protocol session
06:59:46 Daniel And if no session exists yet you create them
06:59:57 Daniel With prekeys downloaded from pep
07:01:14 Yagiza Daniel, well... What does it mean "to create a session"?
07:01:32 wurstsalat has joined
07:01:37 Daniel That is defined by the signal spec
07:01:43 Yagiza Ok
07:03:05 Ge0rG I actually like SEC much more than SCE, with you-know-what as a close second. Can't we change the title to "Stanza Encrypted Content" at least? 😁
07:03:45 Yagiza The next question is: which functions from libsignal-protocol-c do I need to use to generate key/IV pair? Those from sender_key.h?
07:04:16 moparisthebest has left
07:04:46 moparisthebest has joined
07:06:15 Daniel They are not provided by the library. It's just random bytes
07:08:49 Steve Kille has left
07:10:17 Yagiza Daniel, IC. And which function can I use to encrypt my message using that key/IV pair?
07:11:11 Daniel Some aes gcm implementation
07:11:24 Steve Kille has joined
07:12:46 Yagiza Daniel, ok
07:17:27 mimi89999 has left
07:17:35 mimi89999 has joined
07:40:24 Alex has left
07:40:24 Alex has joined
07:45:52 pdurbin has left
07:49:16 lorddavidiii has joined
07:52:07 adityaborikar has left
07:52:50 adityaborikar has joined
07:59:30 COM8 has joined
07:59:39 COM8 has left
07:59:46 UsL has left
08:01:16 rtq3 has joined
08:14:27 alacer has left
08:14:43 alacer has joined
08:14:49 COM8 has joined
08:14:58 COM8 has left
08:15:22 alacer has left
08:18:47 mimi89999 has left
08:19:38 pdurbin has joined
08:29:50 mimi89999 has joined
08:31:28 UsL has joined
08:33:03 alameyo has left
08:33:04 alameyo has joined
08:34:55 debacle has joined
08:44:28 pdurbin has left
08:49:33 pdurbin has joined
08:50:11 COM8 has joined
08:51:17 COM8 has left
08:56:43 UsL has left
08:59:33 pdurbin has left
09:08:10 lskdjf has joined
09:16:11 alacer has joined
09:19:33 pdurbin has joined
09:24:19 j.r has left
09:30:34 j.r has joined
09:36:45 pdurbin has left
09:45:57 alacer has left
09:46:00 alacer has joined
09:46:15 j.r has left
09:46:20 alacer has left
09:46:23 alacer has joined
09:49:35 pdurbin has joined
09:51:11 j.r has joined
09:53:14 rtq3 has left
10:03:34 adityaborikar has left
10:10:08 adityaborikar has joined
10:11:29 pdurbin has left
10:19:13 adityaborikar has left
10:19:34 pdurbin has joined
10:23:31 Nekit has left
10:25:06 alacer has left
10:25:08 alacer has joined
10:26:15 rtq3 has joined
10:26:16 Nekit has joined
10:32:29 alacer has left
10:32:32 alacer has joined
10:34:51 pdurbin has left
10:38:09 j.r has left
10:48:29 COM8 has joined
10:50:54 COM8 has left
10:51:58 adityaborikar has joined
10:53:44 j.r has joined
10:57:41 adityaborikar has left
10:58:05 adityaborikar has joined
10:59:04 j.r has left
11:07:50 rtq3 has left
11:16:49 j.r has joined
11:18:38 rtq3 has joined
11:18:57 igoose has joined
11:25:41 adityaborikar has left
11:25:49 adityaborikar has joined
11:32:44 j.r has left
11:43:47 j.r has joined
11:46:03 adityaborikar has left
11:46:07 adityaborikar has joined
11:52:15 adityaborikar has left
12:19:37 pdurbin has joined
12:28:16 murabito has left
12:28:20 murabito has joined
12:30:54 adityaborikar has joined
12:31:21 pdurbin has left
12:34:06 murabito has left
12:34:09 murabito has joined
12:37:46 adityaborikar has left
12:38:38 adityaborikar has joined
12:38:42 j.r has left
12:38:55 j.r has joined
12:39:29 murabito has left
12:39:32 murabito has joined
12:44:43 adityaborikar has left
12:52:10 lorddavidiii has left
12:58:40 kokonoe has left
12:59:14 kokonoe has joined
13:01:59 adityaborikar has joined
13:04:02 COM8 has joined
13:06:02 moparisthebest has left
13:06:11 COM8 has left
13:06:37 moparisthebest has joined
13:08:05 alacer has left
13:08:06 alacer has joined
13:09:02 COM8 has joined
13:11:00 COM8 Yagiza: I also had quite a few problems understanding the OMEMO XEP. If you need a working example with documentation look at: https://github.com/UWPX/UWPX-Client/blob/master/XMPP_API/Classes/Network/XML/Messages/XEP-0384/OmemoMessageMessage.cs
13:11:10 COM8 has left
13:16:30 adityaborikar has left
13:19:02 j.r has left
13:19:25 UsL has joined
13:27:08 Daniel there is also https://wiki.xmpp.org/web/Tech_pages/OMEMO which can be interesting to people implementing omemo
13:27:31 Daniel it doesn’t answer the specfic questions Yagiza had. but _other_ questions
13:28:02 Yagiza COM8, Daniel, thanx!
13:28:03 Daniel would be interesting to know what problems you COM8 ran into so we can mention it on the tech pages or elsewhere
13:30:24 adityaborikar has joined
13:32:08 UsL has left
13:32:13 COM8 has joined
13:34:34 karoshi has left
13:34:43 karoshi has joined
13:34:50 Yagiza has left
13:36:34 alacer has left
13:36:35 alacer has joined
13:37:30 Yagiza has joined
13:38:15 vanitasvitae Yagiza: for which client are you doing your implementation?
13:39:17 Yagiza vanitasvitae, eyeCU.
13:40:36 COM8 It were some general problems with understanding What the XEP wants from me and which parts comes from libsignal and how it is used in combination with OMEMO. Quiet abstract without a concrete example - at least for me. I had planned to create a PR with changes to the wording and adding some more examples but on the Sprint in Berlin I was talking to people which mentioned there would be some planed changes to the XEP so I will wait until they have been merged before I start updating it.
13:41:38 rtq3 has left
13:42:27 COM8 has left
13:42:59 adityaborikar has left
13:44:06 rtq3 has joined
13:48:59 Yagiza COM8, ok
13:53:32 UsL has joined
13:57:48 j.r has joined
14:09:36 karoshi has left
14:09:49 karoshi has joined
14:14:40 Andrew Nenakhov has left
14:15:10 Andrew Nenakhov has joined
14:18:14 UsL has left
14:18:31 UsL has joined
14:19:35 pdurbin has joined
14:26:17 pdurbin has left
14:30:04 adityaborikar has joined
14:38:37 Lance has joined
14:38:54 Lance has left
14:46:32 edhelas has left
14:46:33 nyco has left
14:46:48 adityaborikar has left
14:47:08 nyco has joined
14:48:06 edhelas has joined
14:52:57 adityaborikar has joined
14:59:40 pep. COM8, I don't think these changes are coming soon tbh, most of them might be breaking from what I understand. So if yours are cosmetic, do PR
15:01:44 adityaborikar has left
15:07:13 adityaborikar has joined
15:07:21 adityaborikar has left
15:07:22 COM8 has joined
15:07:40 adityaborikar has joined
15:08:32 dwd has left
15:08:33 dwd has joined
15:09:08 COM8 pep: Ok thanks for the information - will start working on it.
15:09:11 COM8 has left
15:09:32 dwd has left
15:13:48 dwd has joined
15:14:38 adityaborikar has left
15:15:34 Steve Kille has left
15:20:07 Steve Kille has joined
15:31:22 sezuan has left
15:36:39 andrey.g has left
15:39:45 andrey.g has joined
15:44:46 dwd has left
15:44:48 dwd has joined
15:50:29 kokonoe has left
15:51:23 kokonoe has joined
15:51:26 adityaborikar has joined
15:57:29 lumi has joined
15:57:32 dwd has left
15:57:35 adityaborikar has left
16:02:13 eevvoor has joined
16:05:59 COM8 has joined
16:07:20 lovetox has joined
16:07:35 adityaborikar has joined
16:08:38 COM8 Is it only me or is somebody else getting duplicate messages in here since ~3 days
16:08:50 Ge0rG COM8: must be you
16:08:56 Ge0rG COM8: must be you
16:09:02 UsL has left
16:09:08 COM8 Ok 🤔
16:12:03 COM8 has left
16:14:09 adityaborikar has left
16:18:02 jonas’ Ge0rG, you troll.
16:19:37 pdurbin has joined
16:22:01 Ge0rG SCNR
16:30:16 sezuan has joined
16:31:29 wojtek has joined
16:31:39 sezuan has left
16:31:42 sezuan has joined
16:32:03 adityaborikar has joined
16:33:07 pdurbin has left
16:33:07 sezuan has left
16:33:09 sezuan has joined
16:34:34 sezuan has left
16:34:37 sezuan has joined
16:35:49 alacer has left
16:35:51 alacer has joined
16:36:01 sezuan has left
16:36:04 sezuan has joined
16:37:33 sezuan has left
16:37:36 sezuan has joined
16:38:11 adityaborikar has left
16:39:05 sezuan has left
16:39:07 wojtek has left
16:39:08 sezuan has joined
16:40:37 sezuan has left
16:40:40 sezuan has joined
16:42:05 sezuan has left
16:42:08 sezuan has joined
16:43:33 sezuan has left
16:43:36 sezuan has joined
16:45:01 sezuan has left
16:45:05 sezuan has joined
16:46:30 sezuan has left
16:46:34 sezuan has joined
16:47:02 Andrew Nenakhov has left
16:48:07 sezuan has left
16:48:12 sezuan has joined
16:48:19 Andrew Nenakhov has joined
16:49:05 UsL has joined
16:49:34 sezuan has left
16:49:35 sezuan has joined
16:49:42 Andrew Nenakhov has left
16:50:38 adityaborikar has joined
16:51:45 goffi has left
16:52:18 sezuan has left
16:55:35 eevvoor has left
16:56:48 Andrew Nenakhov has joined
16:57:25 j.r has left
16:57:32 j.r has joined
17:02:12 matlag has joined
17:05:43 valo has left
17:06:26 lnj has left
17:10:50 dwd has joined
17:13:12 j.r has left
17:15:37 lumi has left
17:18:30 j.r has joined
17:20:53 lovetox You have to understand the signal protocol and librarys that implement it first
17:21:13 lovetox then you read the XEP and learn how you can wrap that for xmll
17:21:16 lovetox then you read the XEP and learn how you can wrap that for xmpp
17:22:34 lovetox RFCs for xmpp also dont describe how TLS works, you have to understand what TLS is, that there are librarys for it, how to use these librarys, and then you read the XMPP RFC, on how to use it in context of XMPP
17:23:35 Andrew Nenakhov has left
17:23:39 lovetox So yes if you have no idea what the signal protocol is and how to use the librarys and expect the XEP tells you all that, this will not work out
17:24:03 Andrew Nenakhov has joined
17:27:41 dwd has left
17:27:42 dwd has joined
17:29:43 Douglas Terabyte has left
17:33:32 dwd has left
17:38:00 frainz has left
17:39:58 frainz has joined
17:41:17 dwd has joined
17:43:34 lumi has joined
17:59:39 alacer has left
18:02:52 UsL has left
18:10:41 Lance has joined
18:14:44 rion has left
18:14:47 rion has joined
18:19:38 pdurbin has joined
18:23:45 Nekit has left
18:32:27 pdurbin has left
18:36:54 Yagiza Daniel, so, I use Signal Protocol session to encrypt key/IV pair instead of messagea. And messages themself are encrypted with that key/IV pair, which a generate randomly right?
18:38:22 valo has joined
18:38:49 Lance has left
18:39:16 Daniel Yes
18:39:23 Daniel The IV isn't encrypted. But yes
18:40:27 Yagiza Daniel, so, then.. what is GCM authentication tag, whih I need to concatenated with a key?
18:42:38 Daniel Yagiza: your gcm library will either give that to you or append that to the cipher text
18:42:56 Yagiza Daniel, IC.
18:49:55 sezuan has joined
18:49:59 sezuan has left
18:50:00 sezuan has joined
18:50:24 dwd has left
18:50:29 dwd has joined
19:00:32 dwd has left
19:01:32 mimi89999 has left
19:01:41 mimi89999 has joined
19:07:48 dwd has joined
19:10:54 Wojciech Kapcia has joined
19:11:41 Wojciech Kapcia has left
19:18:59 matlag has left
19:30:32 dwd has left
19:33:28 dwd has joined
19:45:47 matlag has joined
19:45:49 Nekit has joined
19:49:28 Yagiza has left
19:50:50 debacle has left
19:56:52 madhur.garg has joined
20:00:07 madhur.garg has left
20:01:37 sezuan has left
20:03:27 Lance has joined
20:20:10 j.r has left
20:21:52 Douglas Terabyte has joined
20:34:13 j.r has joined
21:07:43 zach has left
21:08:10 zach has joined
21:12:53 rtq3 has left
21:13:10 andy has left
21:13:16 rtq3 has joined
21:19:46 lovetox has left
21:33:14 rtq3 has left
21:33:37 rtq3 has joined
21:47:43 eevvoor has joined
22:00:11 Lance has left
22:08:07 mimi89999 has left
22:08:09 Nekit has left
22:08:12 mimi89999 has joined
22:11:20 eevvoor has left
22:12:14 eevvoor has joined
22:17:03 Lance has joined
22:17:10 lovetox has joined
22:19:39 pdurbin has joined
22:24:04 eevvoor has left
22:24:44 lovetox has left
22:28:20 pdurbin has left
22:34:29 waqas has joined
22:35:01 rtq3 has left
22:36:57 murabito has left
22:37:00 murabito has joined
22:57:56 wurstsalat has left
22:59:37 rtq3 has joined
23:04:04 rtq3 has left
23:04:51 rtq3 has joined
23:18:22 j.r has left
23:23:10 rtq3 has left
23:30:33 lnj has joined
23:31:17 UsL has joined
23:42:20 UsL has left
23:42:47 UsL has joined
23:45:49 Lance has left
23:48:17 UsL has left
23:48:21 UsL has joined