prosody-modules
a76c420eca61
mod_e2e_policy/mod_e2e_policy.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody-modules

Annotate

mod_e2e_policy/mod_e2e_policy.lua @ 3386:a76c420eca61

mod_e2e_policy: Fix an error with getting stanza from event
author Michel Le Bihan <michel@lebihan.pl>
date Fri, 30 Nov 2018 19:31:25 +0100
parent 3385:762c7e7ee64b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2212
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
1 local st = require "util.stanza";
3385
762c7e7ee64b mod_e2e_policy: Verify that the bare JID of stanza to and from is not in the whitelist
Michel Le Bihan <michel@lebihan.pl>
parents: 3219
diff changeset
2 local jid_bare = require "util.jid".bare;
2212
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
3 local host = module.host;
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
4 local e2e_policy_chat = module:get_option_string("e2e_policy_chat", "optional"); -- possible values: none, optional and required
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
5 local e2e_policy_muc = module:get_option_string("e2e_policy_muc", "optional"); -- possible values: none, optional and required
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
6 local e2e_policy_whitelist = module:get_option_set("e2e_policy_whitelist", { }); -- make this module ignore messages sent to and from this JIDs or MUCs
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
7
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
8 local e2e_policy_message_optional_chat = module:get_option_string("e2e_policy_message_optional_chat", "For security reasons, OMEMO, OTR or PGP encryption is STRONGLY recommended for conversations on this server.");
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
9 local e2e_policy_message_required_chat = module:get_option_string("e2e_policy_message_required_chat", "For security reasons, OMEMO, OTR or PGP encryption is required for conversations on this server.");
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
10 local e2e_policy_message_optional_muc = module:get_option_string("e2e_policy_message_optional_muc", "For security reasons, OMEMO, OTR or PGP encryption is STRONGLY recommended for MUC on this server.");
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
11 local e2e_policy_message_required_muc = module:get_option_string("e2e_policy_message_required_muc", "For security reasons, OMEMO, OTR or PGP encryption is required for MUC on this server.");
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
12
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
13 function warn_on_plaintext_messages(event)
2331
611a787e6d08 mod_e2e_policy: Do not reply to error stenzas
Michel Le Bihan <michel@lebihan.pl>
parents: 2212
diff changeset
14 -- check if JID is whitelisted
3386
a76c420eca61 mod_e2e_policy: Fix an error with getting stanza from event
Michel Le Bihan <michel@lebihan.pl>
parents: 3385
diff changeset
15 if e2e_policy_whitelist:contains(jid_bare(event.stanza.attr.from)) or e2e_policy_whitelist:contains(jid_bare(event.stanza.attr.to)) then
2212
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
16 return nil;
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
17 end
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
18 local body = event.stanza:get_child_text("body");
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
19 -- do not warn for status messages
2331
611a787e6d08 mod_e2e_policy: Do not reply to error stenzas
Michel Le Bihan <michel@lebihan.pl>
parents: 2212
diff changeset
20 if not body or event.stanza.attr.type == "error" then
2212
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
21 return nil;
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
22 end
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
23 -- check otr
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
24 if body and body:sub(1,4) == "?OTR" then
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
25 return nil;
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
26 end
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
27 -- check omemo https://xmpp.org/extensions/inbox/omemo.html
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
28 if event.stanza:get_child("encrypted", "eu.siacs.conversations.axolotl") or event.stanza:get_child("encrypted", "urn:xmpp:omemo:0") then
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
29 return nil;
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
30 end
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
31 -- check xep27 pgp https://xmpp.org/extensions/xep-0027.html
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
32 if event.stanza:get_child("x", "jabber:x:encrypted") then
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
33 return nil;
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
34 end
2331
611a787e6d08 mod_e2e_policy: Do not reply to error stenzas
Michel Le Bihan <michel@lebihan.pl>
parents: 2212
diff changeset
35 -- check xep373 pgp (OX) https://xmpp.org/extensions/xep-0373.html
2212
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
36 if event.stanza:get_child("openpgp", "urn:xmpp:openpgp:0") then
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
37 return nil;
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
38 end
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
39 -- no valid encryption found
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
40 if e2e_policy_chat == "optional" and event.stanza.attr.type ~= "groupchat" then
3219
58d61459cdb1 mod_e2e_policy: Always add the 'to' in warning stanzas
Michel Le Bihan <michel@lebihan.pl>
parents: 2331
diff changeset
41 event.origin.send(st.message({ from = host, to = event.stanza.attr.from, type = "headline" }, e2e_policy_message_optional_chat));
2212
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
42 end
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
43 if e2e_policy_chat == "required" and event.stanza.attr.type ~= "groupchat" then
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
44 return event.origin.send(st.error_reply(event.stanza, "modify", "policy-violation", e2e_policy_message_required_chat));
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
45 end
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
46 if e2e_policy_muc == "optional" and event.stanza.attr.type == "groupchat" then
3219
58d61459cdb1 mod_e2e_policy: Always add the 'to' in warning stanzas
Michel Le Bihan <michel@lebihan.pl>
parents: 2331
diff changeset
47 event.origin.send(st.message({ from = host, to = event.stanza.attr.from, type = "headline" }, e2e_policy_message_optional_muc));
2212
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
48 end
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
49 if e2e_policy_muc == "required" and event.stanza.attr.type == "groupchat" then
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
50 return event.origin.send(st.error_reply(event.stanza, "modify", "policy-violation", e2e_policy_message_required_muc));
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
51 end
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
52 end
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
53
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
54 module:hook("pre-message/bare", warn_on_plaintext_messages, 300);
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
55 module:hook("pre-message/full", warn_on_plaintext_messages, 300);
57dcad6543c9 mod_e2e_policy: Initial commit
Michel Le Bihan <michel@lebihan.pl>
parents:
diff changeset
56 module:hook("pre-message/host", warn_on_plaintext_messages, 300);