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mod_tls_policy/mod_tls_policy.lua @ 5600:6d0574bfbf5d
mod_client_management: Include software version in table (when known)
Showing software versions could be useful for statistical reasons, e.g.
determining how quickly (or not) users upgrade, but most importantly for
revoking vulnerable clients versions in case of a security issue.
author | Kim Alvefur <zash@zash.se> |
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date | Thu, 13 Jul 2023 23:26:02 +0200 |
parent | 4674:1b701f208b1b |
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assert(require"ssl.core".info, "Incompatible LuaSec version"); local function hook(event_name, typ, policy) if not policy then return end if policy == "FS" then policy = { cipher = "^E?C?DHE%-" }; elseif type(policy) == "string" then policy = { cipher = policy }; end module:hook(event_name, function (event) local origin = event.origin; if origin.conn and origin.conn:ssl() then local info = origin.conn:socket():info(); for key, what in pairs(policy) do module:log("debug", "Does info[%q] = %s match %s ?", key, tostring(info[key]), tostring(what)); if (type(what) == "number" and what < info[key] ) or (type(what) == "string" and not info[key]:match(what)) then origin:close({ condition = "policy-violation", text = ("TLS %s '%s' not acceptable"):format(key, tostring(info[key])) }); return false; end module:log("debug", "Seems so"); end module:log("debug", "Policy matches"); end end, 1000); end local policy = module:get_option(module.name, {}); if type(policy) == "string" then policy = { c2s = policy, s2s = policy }; end hook("stream-features", "c2s", policy.c2s); hook("s2s-stream-features", "s2sin", policy.s2sin or policy.s2s); hook("stanza/http://etherx.jabber.org/streams:features", "s2sout", policy.s2sout or policy.s2s);