Minor style changes
andryyy
parent
653d23a843
commit
a18bcce93d
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@ -1,287 +1,286 @@
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--[[
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Copyright (c) 2016, Andrew Lewis <nerf@judo.za.org>
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Copyright (c) 2016, Vsevolod Stakhov <vsevolod@highsecure.ru>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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]]--
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local rspamd_logger = require "rspamd_logger"
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local rspamd_util = require "rspamd_util"
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if confighelp then
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return
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end
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local settings = {
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allow_envfrom_empty = true,
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allow_hdrfrom_mismatch = false,
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allow_hdrfrom_mismatch_local = false,
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allow_hdrfrom_mismatch_sign_networks = false,
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allow_hdrfrom_multiple = false,
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allow_username_mismatch = false,
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auth_only = true,
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domain = {},
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path = string.format('%s/%s/%s', rspamd_paths['DBDIR'], 'dkim', '$domain.$selector.key'),
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sign_local = true,
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selector = 'dkim',
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symbol = 'DKIM_SIGNED',
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try_fallback = true,
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use_domain = 'header',
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use_esld = true,
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use_redis = false,
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key_prefix = 'dkim_keys', -- default hash name
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}
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local E = {}
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local N = 'dkim_signing'
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local redis_params
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local function simple_template(tmpl, keys)
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local lpeg = require "lpeg"
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local var_lit = lpeg.P { lpeg.R("az") + lpeg.R("AZ") + lpeg.R("09") + "_" }
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local var = lpeg.P { (lpeg.P("$") / "") * ((var_lit^1) / keys) }
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local var_braced = lpeg.P { (lpeg.P("${") / "") * ((var_lit^1) / keys) * (lpeg.P("}") / "") }
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local template_grammar = lpeg.Cs((var + var_braced + 1)^0)
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return lpeg.match(template_grammar, tmpl)
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end
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local function dkim_signing_cb(task)
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local is_local, is_sign_networks
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local auser = task:get_user()
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local ip = task:get_from_ip()
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if ip and ip:is_local() then
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is_local = true
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end
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if settings.auth_only and not auser then
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if (settings.sign_networks and settings.sign_networks:get_key(ip)) then
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is_sign_networks = true
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rspamd_logger.debugm(N, task, 'mail is from address in sign_networks')
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elseif settings.sign_local and is_local then
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rspamd_logger.debugm(N, task, 'mail is from local address')
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else
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rspamd_logger.debugm(N, task, 'ignoring unauthenticated mail')
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return
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end
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end
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local efrom = task:get_from('smtp')
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if not settings.allow_envfrom_empty and
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#(((efrom or E)[1] or E).addr or '') == 0 then
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rspamd_logger.debugm(N, task, 'empty envelope from not allowed')
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return false
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end
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local hfrom = task:get_from('mime')
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if not settings.allow_hdrfrom_multiple and (hfrom or E)[2] then
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rspamd_logger.debugm(N, task, 'multiple header from not allowed')
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return false
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end
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local dkim_domain
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local hdom = ((hfrom or E)[1] or E).domain
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local edom = ((efrom or E)[1] or E).domain
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if hdom then
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hdom = hdom:lower()
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end
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if edom then
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edom = edom:lower()
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end
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if settings.use_domain_sign_networks and is_sign_networks then
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if settings.use_domain_sign_networks == 'header' then
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dkim_domain = hdom
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else
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dkim_domain = edom
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end
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elseif settings.use_domain_local and is_local then
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if settings.use_domain_local == 'header' then
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dkim_domain = hdom
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else
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dkim_domain = edom
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end
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else
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if settings.use_domain == 'header' then
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dkim_domain = hdom
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else
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dkim_domain = edom
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end
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end
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if not dkim_domain then
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rspamd_logger.debugm(N, task, 'could not extract dkim domain')
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return false
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end
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if settings.use_esld then
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dkim_domain = rspamd_util.get_tld(dkim_domain)
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if settings.use_domain == 'envelope' and hdom then
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hdom = rspamd_util.get_tld(hdom)
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elseif settings.use_domain == 'header' and edom then
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edom = rspamd_util.get_tld(edom)
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end
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end
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if edom and hdom and not settings.allow_hdrfrom_mismatch and hdom ~= edom then
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if settings.allow_hdrfrom_mismatch_local and is_local then
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rspamd_logger.debugm(N, task, 'domain mismatch allowed for local IP: %1 != %2', hdom, edom)
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elseif settings.allow_hdrfrom_mismatch_sign_networks and is_sign_networks then
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rspamd_logger.debugm(N, task, 'domain mismatch allowed for sign_networks: %1 != %2', hdom, edom)
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else
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rspamd_logger.debugm(N, task, 'domain mismatch not allowed: %1 != %2', hdom, edom)
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return false
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end
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end
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if auser and not settings.allow_username_mismatch then
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local udom = string.match(auser, '.*@(.*)')
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if not udom then
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rspamd_logger.debugm(N, task, 'couldnt find domain in username')
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return false
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end
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if settings.use_esld then
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udom = rspamd_util.get_tld(udom)
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end
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if udom ~= dkim_domain then
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rspamd_logger.debugm(N, task, 'user domain mismatch')
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return false
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end
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end
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local p = {}
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if settings.domain[dkim_domain] then
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p.selector = settings.domain[dkim_domain].selector
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p.key = settings.domain[dkim_domain].path
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end
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if not (p.key and p.selector) and not
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(settings.try_fallback or settings.use_redis or settings.selector_map or settings.path_map) then
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rspamd_logger.debugm(N, task, 'dkim unconfigured and fallback disabled')
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return false
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end
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if not p.key then
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if not settings.use_redis then
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p.key = settings.path
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end
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end
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if not p.selector then
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p.selector = settings.selector
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end
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p.domain = dkim_domain
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if settings.selector_map then
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local data = settings.selector_map:get_key(dkim_domain)
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if data then
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p.selector = data
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end
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end
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if settings.path_map then
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local data = settings.path_map:get_key(dkim_domain)
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if data then
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p.key = data
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end
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end
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if settings.use_redis then
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local function try_redis_key(selector)
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p.key = nil
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p.selector = selector
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local rk = string.format('%s.%s', p.selector, p.domain)
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local function redis_key_cb(err, data)
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if err or type(data) ~= 'string' then
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rspamd_logger.infox(rspamd_config, "cannot make request to load DKIM key for %s: %s",
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rk, err)
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else
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p.rawkey = data
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if rspamd_plugins.dkim.sign(task, p) then
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task:insert_result(settings.symbol, 1.0)
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end
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end
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end
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local ret = rspamd_redis_make_request(task,
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redis_params, -- connect params
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rk, -- hash key
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false, -- is write
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redis_key_cb, --callback
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'HGET', -- command
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{settings.key_prefix, rk} -- arguments
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)
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if not ret then
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rspamd_logger.infox(rspamd_config, "cannot make request to load DKIM key for %s", rk)
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end
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end
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if settings.selector_prefix then
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rspamd_logger.infox(rspamd_config, "Using selector prefix %s for domain %s", settings.selector_prefix, p.domain);
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local function redis_selector_cb(err, data)
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if err or type(data) ~= 'string' then
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rspamd_logger.infox(rspamd_config, "cannot make request to load DKIM selector for domain %s: %s", p.domain, err)
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else
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try_redis_key(data)
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end
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end
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local ret = rspamd_redis_make_request(task,
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redis_params, -- connect params
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p.domain, -- hash key
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false, -- is write
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redis_selector_cb, --callback
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'HGET', -- command
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{settings.selector_prefix, p.domain} -- arguments
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)
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if not ret then
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rspamd_logger.infox(rspamd_config, "cannot make request to load DKIM selector for %s", p.domain)
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end
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else
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if not p.selector then
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rspamd_logger.errx(task, 'No selector specified')
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return false
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end
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try_redis_key(p.selector)
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end
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else
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if (p.key and p.selector) then
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p.key = simple_template(p.key, {domain = p.domain, selector = p.selector})
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return rspamd_plugins.dkim.sign(task, p)
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else
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rspamd_logger.infox(task, 'key path or dkim selector unconfigured; no signing')
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return false
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end
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end
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end
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local opts = rspamd_config:get_all_opt('dkim_signing')
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if not opts then return end
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for k,v in pairs(opts) do
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if k == 'sign_networks' then
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settings[k] = rspamd_map_add(N, k, 'radix', 'DKIM signing networks')
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elseif k == 'path_map' then
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settings[k] = rspamd_map_add(N, k, 'map', 'Paths to DKIM signing keys')
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elseif k == 'selector_map' then
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settings[k] = rspamd_map_add(N, k, 'map', 'DKIM selectors')
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else
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settings[k] = v
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end
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end
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if not (settings.use_redis or settings.path or settings.domain or settings.path_map or settings.selector_map) then
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rspamd_logger.infox(rspamd_config, 'mandatory parameters missing, disable dkim signing')
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return
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end
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if settings.use_redis then
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redis_params = rspamd_parse_redis_server('dkim_signing')
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if not redis_params then
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rspamd_logger.errx(rspamd_config, 'no servers are specified, but module is configured to load keys from redis, disable dkim signing')
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return
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end
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end
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if settings.use_domain ~= 'header' and settings.use_domain ~= 'envelope' then
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rspamd_logger.errx(rspamd_config, "Value for 'use_domain' is invalid")
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settings.use_domain = 'header'
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end
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rspamd_config:register_symbol({
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name = settings['symbol'],
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callback = dkim_signing_cb
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})
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--[[
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Copyright (c) 2016, Andrew Lewis <nerf@judo.za.org>
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Copyright (c) 2016, Vsevolod Stakhov <vsevolod@highsecure.ru>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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]]--
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local rspamd_logger = require "rspamd_logger"
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local rspamd_util = require "rspamd_util"
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if confighelp then
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return
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end
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local settings = {
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allow_envfrom_empty = true,
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allow_hdrfrom_mismatch = false,
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allow_hdrfrom_mismatch_local = false,
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allow_hdrfrom_mismatch_sign_networks = false,
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allow_hdrfrom_multiple = false,
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allow_username_mismatch = false,
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auth_only = true,
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domain = {},
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path = string.format('%s/%s/%s', rspamd_paths['DBDIR'], 'dkim', '$domain.$selector.key'),
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sign_local = true,
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selector = 'dkim',
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symbol = 'DKIM_SIGNED',
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try_fallback = true,
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use_domain = 'header',
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use_esld = true,
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use_redis = false,
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key_prefix = 'dkim_keys', -- default hash name
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}
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local E = {}
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local N = 'dkim_signing'
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local redis_params
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local function simple_template(tmpl, keys)
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local lpeg = require "lpeg"
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local var_lit = lpeg.P { lpeg.R("az") + lpeg.R("AZ") + lpeg.R("09") + "_" }
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local var = lpeg.P { (lpeg.P("$") / "") * ((var_lit^1) / keys) }
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local var_braced = lpeg.P { (lpeg.P("${") / "") * ((var_lit^1) / keys) * (lpeg.P("}") / "") }
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local template_grammar = lpeg.Cs((var + var_braced + 1)^0)
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return lpeg.match(template_grammar, tmpl)
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end
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local function dkim_signing_cb(task)
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local is_local, is_sign_networks
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local auser = task:get_user()
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local ip = task:get_from_ip()
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if ip and ip:is_local() then
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is_local = true
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end
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if settings.auth_only and not auser then
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if (settings.sign_networks and settings.sign_networks:get_key(ip)) then
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is_sign_networks = true
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rspamd_logger.debugm(N, task, 'mail is from address in sign_networks')
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elseif settings.sign_local and is_local then
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rspamd_logger.debugm(N, task, 'mail is from local address')
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else
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rspamd_logger.debugm(N, task, 'ignoring unauthenticated mail')
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return
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end
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end
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local efrom = task:get_from('smtp')
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if not settings.allow_envfrom_empty and
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#(((efrom or E)[1] or E).addr or '') == 0 then
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rspamd_logger.debugm(N, task, 'empty envelope from not allowed')
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return false
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end
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local hfrom = task:get_from('mime')
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if not settings.allow_hdrfrom_multiple and (hfrom or E)[2] then
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rspamd_logger.debugm(N, task, 'multiple header from not allowed')
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return false
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end
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local dkim_domain
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local hdom = ((hfrom or E)[1] or E).domain
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local edom = ((efrom or E)[1] or E).domain
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if hdom then
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hdom = hdom:lower()
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end
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if edom then
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edom = edom:lower()
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end
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if settings.use_domain_sign_networks and is_sign_networks then
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if settings.use_domain_sign_networks == 'header' then
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dkim_domain = hdom
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else
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dkim_domain = edom
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end
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elseif settings.use_domain_local and is_local then
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if settings.use_domain_local == 'header' then
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dkim_domain = hdom
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else
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dkim_domain = edom
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end
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else
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if settings.use_domain == 'header' then
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dkim_domain = hdom
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else
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dkim_domain = edom
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end
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end
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if not dkim_domain then
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rspamd_logger.debugm(N, task, 'could not extract dkim domain')
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return false
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end
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if settings.use_esld then
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dkim_domain = rspamd_util.get_tld(dkim_domain)
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if settings.use_domain == 'envelope' and hdom then
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hdom = rspamd_util.get_tld(hdom)
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elseif settings.use_domain == 'header' and edom then
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edom = rspamd_util.get_tld(edom)
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end
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end
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if edom and hdom and not settings.allow_hdrfrom_mismatch and hdom ~= edom then
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if settings.allow_hdrfrom_mismatch_local and is_local then
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rspamd_logger.debugm(N, task, 'domain mismatch allowed for local IP: %1 != %2', hdom, edom)
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elseif settings.allow_hdrfrom_mismatch_sign_networks and is_sign_networks then
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rspamd_logger.debugm(N, task, 'domain mismatch allowed for sign_networks: %1 != %2', hdom, edom)
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else
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rspamd_logger.debugm(N, task, 'domain mismatch not allowed: %1 != %2', hdom, edom)
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return false
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end
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end
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if auser and not settings.allow_username_mismatch then
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local udom = string.match(auser, '.*@(.*)')
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if not udom then
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rspamd_logger.debugm(N, task, 'couldnt find domain in username')
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return false
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end
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if settings.use_esld then
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udom = rspamd_util.get_tld(udom)
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end
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if udom ~= dkim_domain then
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rspamd_logger.debugm(N, task, 'user domain mismatch')
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return false
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end
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end
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local p = {}
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if settings.domain[dkim_domain] then
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p.selector = settings.domain[dkim_domain].selector
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p.key = settings.domain[dkim_domain].path
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end
|
||||
if not (p.key and p.selector) and not
|
||||
(settings.try_fallback or settings.use_redis or settings.selector_map or settings.path_map) then
|
||||
rspamd_logger.debugm(N, task, 'dkim unconfigured and fallback disabled')
|
||||
return false
|
||||
end
|
||||
if not p.key then
|
||||
if not settings.use_redis then
|
||||
p.key = settings.path
|
||||
end
|
||||
end
|
||||
if not p.selector then
|
||||
p.selector = settings.selector
|
||||
end
|
||||
p.domain = dkim_domain
|
||||
|
||||
if settings.selector_map then
|
||||
local data = settings.selector_map:get_key(dkim_domain)
|
||||
if data then
|
||||
p.selector = data
|
||||
end
|
||||
end
|
||||
if settings.path_map then
|
||||
local data = settings.path_map:get_key(dkim_domain)
|
||||
if data then
|
||||
p.key = data
|
||||
end
|
||||
end
|
||||
|
||||
if settings.use_redis then
|
||||
local function try_redis_key(selector)
|
||||
p.key = nil
|
||||
p.selector = selector
|
||||
local rk = string.format('%s.%s', p.selector, p.domain)
|
||||
local function redis_key_cb(err, data)
|
||||
if err or type(data) ~= 'string' then
|
||||
rspamd_logger.infox(rspamd_config, "cannot make request to load DKIM key for %s: %s",
|
||||
rk, err)
|
||||
else
|
||||
p.rawkey = data
|
||||
if rspamd_plugins.dkim.sign(task, p) then
|
||||
task:insert_result(settings.symbol, 1.0)
|
||||
end
|
||||
end
|
||||
end
|
||||
local ret = rspamd_redis_make_request(task,
|
||||
redis_params, -- connect params
|
||||
rk, -- hash key
|
||||
false, -- is write
|
||||
redis_key_cb, --callback
|
||||
'HGET', -- command
|
||||
{settings.key_prefix, rk} -- arguments
|
||||
)
|
||||
if not ret then
|
||||
rspamd_logger.infox(rspamd_config, "cannot make request to load DKIM key for %s", rk)
|
||||
end
|
||||
end
|
||||
if settings.selector_prefix then
|
||||
rspamd_logger.infox(rspamd_config, "Using selector prefix %s for domain %s", settings.selector_prefix, p.domain);
|
||||
local function redis_selector_cb(err, data)
|
||||
if err or type(data) ~= 'string' then
|
||||
rspamd_logger.infox(rspamd_config, "cannot make request to load DKIM selector for domain %s: %s", p.domain, err)
|
||||
else
|
||||
try_redis_key(data)
|
||||
end
|
||||
end
|
||||
local ret = rspamd_redis_make_request(task,
|
||||
redis_params, -- connect params
|
||||
p.domain, -- hash key
|
||||
false, -- is write
|
||||
redis_selector_cb, --callback
|
||||
'HGET', -- command
|
||||
{settings.selector_prefix, p.domain} -- arguments
|
||||
)
|
||||
if not ret then
|
||||
rspamd_logger.infox(rspamd_config, "cannot make request to load DKIM selector for %s", p.domain)
|
||||
end
|
||||
else
|
||||
if not p.selector then
|
||||
rspamd_logger.errx(task, 'No selector specified')
|
||||
return false
|
||||
end
|
||||
try_redis_key(p.selector)
|
||||
end
|
||||
else
|
||||
if (p.key and p.selector) then
|
||||
p.key = simple_template(p.key, {domain = p.domain, selector = p.selector})
|
||||
return rspamd_plugins.dkim.sign(task, p)
|
||||
else
|
||||
rspamd_logger.infox(task, 'key path or dkim selector unconfigured; no signing')
|
||||
return false
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
local opts = rspamd_config:get_all_opt('dkim_signing')
|
||||
if not opts then return end
|
||||
for k,v in pairs(opts) do
|
||||
if k == 'sign_networks' then
|
||||
settings[k] = rspamd_map_add(N, k, 'radix', 'DKIM signing networks')
|
||||
elseif k == 'path_map' then
|
||||
settings[k] = rspamd_map_add(N, k, 'map', 'Paths to DKIM signing keys')
|
||||
elseif k == 'selector_map' then
|
||||
settings[k] = rspamd_map_add(N, k, 'map', 'DKIM selectors')
|
||||
else
|
||||
settings[k] = v
|
||||
end
|
||||
end
|
||||
if not (settings.use_redis or settings.path or settings.domain or settings.path_map or settings.selector_map) then
|
||||
rspamd_logger.infox(rspamd_config, 'mandatory parameters missing, disable dkim signing')
|
||||
return
|
||||
end
|
||||
if settings.use_redis then
|
||||
redis_params = rspamd_parse_redis_server('dkim_signing')
|
||||
|
||||
if not redis_params then
|
||||
rspamd_logger.errx(rspamd_config, 'no servers are specified, but module is configured to load keys from redis, disable dkim signing')
|
||||
return
|
||||
end
|
||||
end
|
||||
if settings.use_domain ~= 'header' and settings.use_domain ~= 'envelope' then
|
||||
rspamd_logger.errx(rspamd_config, "Value for 'use_domain' is invalid")
|
||||
settings.use_domain = 'header'
|
||||
end
|
||||
|
||||
rspamd_config:register_symbol({
|
||||
name = settings['symbol'],
|
||||
callback = dkim_signing_cb
|
||||
})
|
||||
|
|
|
|||
Loading…
Reference in New Issue