Mercurial > prosody-modules

annotate mod_warn_legacy_tls/mod_warn_legacy_tls.lua @ 4651:8231774f5bfd

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mod_cloud_notify_encrypted: Ensure body substring remains valid UTF-8 The `body:sub()` call risks splitting the string in the middle of a multi-byte UTF-8 sequence. This should have been caught by util.stanza validation, but that would have caused some havoc, at the very least causing the notification to not be sent. There have been no reports of this happening. Likely because this module isn't widely deployed among users with languages that use many longer UTF-8 sequences. The util.encodings.utf8.valid() function is O(n) where only the last sequence really needs to be checked, but it's in C and expected to be fast.
author Kim Alvefur <zash@zash.se>
date Sun, 22 Aug 2021 13:22:59 +0200
parents 406b32b50457
children
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37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
Kim Alvefur <zash@zash.se>
parents:
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1 local st = require"util.stanza";
37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
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2 local host = module.host;
37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
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3
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36023eb3254e mod_warn_legacy_tls: Adapt to warn about TLS < 1.2
Kim Alvefur <zash@zash.se>
parents: 3726
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4 local deprecated_protocols = module:get_option_set("legacy_tls_versions", { "SSLv3", "TLSv1", "TLSv1.1" });
36023eb3254e mod_warn_legacy_tls: Adapt to warn about TLS < 1.2
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parents: 3726
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5 local warning_message = module:get_option_string("legacy_tls_warning", "Your connection is encrypted using the %s protocol, which has known problems and will be disabled soon. Please upgrade your client.");
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37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
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parents:
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37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
Kim Alvefur <zash@zash.se>
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7 module:hook("resource-bind", function (event)
37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
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8 local session = event.session;
37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
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9 module:log("debug", "mod_%s sees that %s logged in", module.name, session.username);
37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
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37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
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11 local ok, protocol = pcall(function(session)
37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
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12 return session.conn:socket():info"protocol";
37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
Kim Alvefur <zash@zash.se>
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13 end, session);
37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
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14 if not ok then
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36023eb3254e mod_warn_legacy_tls: Adapt to warn about TLS < 1.2
Kim Alvefur <zash@zash.se>
parents: 3726
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15 module:log("debug", "Could not determine TLS version: %s", protocol);
36023eb3254e mod_warn_legacy_tls: Adapt to warn about TLS < 1.2
Kim Alvefur <zash@zash.se>
parents: 3726
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16 elseif deprecated_protocols:contains(protocol) then
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ec3eb426271e mod_warn_legacy_tls: Log a warning attached to sessions using deprecated TLS versions
Kim Alvefur <zash@zash.se>
parents: 3727
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17 session.log("warn", "Uses %s", protocol);
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37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
Kim Alvefur <zash@zash.se>
parents:
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18 module:add_timer(15, function ()
37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
Kim Alvefur <zash@zash.se>
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19 if session.type == "c2s" and session.resource then
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36023eb3254e mod_warn_legacy_tls: Adapt to warn about TLS < 1.2
Kim Alvefur <zash@zash.se>
parents: 3726
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20 session.send(st.message({ from = host, type = "headline", to = session.full_jid }, warning_message:format(protocol)));
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37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
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21 end
37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
Kim Alvefur <zash@zash.se>
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22 end);
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406b32b50457 mod_warn_legacy_tls: Log debug message for acceptable TLS versions
Kim Alvefur <zash@zash.se>
parents: 3730
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23 else
406b32b50457 mod_warn_legacy_tls: Log debug message for acceptable TLS versions
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parents: 3730
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24 module:log("debug", "Using acceptable TLS version: %s", protocol);
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37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
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25 end
37cef218ba20 mod_sslv3_warn: Module to notice users connected with SSLv3 that they need to upgrade becasue SSLv3 is insecure
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26 end);