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--[[
Copyright (c) 2015, Vsevolod Stakhov <vsevolod@highsecure.ru>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
]]--
local logger = require "rspamd_logger"
local ucl = require "ucl"
local spf_symbols = {
symbol_allow = 'R_SPF_ALLOW',
symbol_deny = 'R_SPF_FAIL',
symbol_softfail = 'R_SPF_SOFTFAIL',
symbol_neutral = 'R_SPF_NEUTRAL',
symbol_tempfail = 'R_SPF_DNSFAIL',
symbol_na = 'R_SPF_NA',
symbol_permfail = 'R_SPF_PERMFAIL',
}
local dkim_symbols = {
symbol_allow = 'R_DKIM_ALLOW',
symbol_deny = 'R_DKIM_REJECT',
symbol_tempfail = 'R_DKIM_TEMPFAIL',
symbol_na = 'R_DKIM_NA',
symbol_permfail = 'R_DKIM_PERMFAIL',
}
local dmarc_symbols = {
allow = 'DMARC_POLICY_ALLOW',
badpolicy = 'DMARC_BAD_POLICY',
dnsfail = 'DMARC_DNSFAIL',
na = 'DMARC_NA',
reject = 'DMARC_POLICY_REJECT',
softfail = 'DMARC_POLICY_SOFTFAIL',
quarantine = 'DMARC_POLICY_QUARANTINE',
}
local opts = rspamd_config:get_all_opt('dmarc')
if opts and opts['symbols'] then
for k,_ in pairs(dmarc_symbols) do
if opts['symbols'][k] then
dmarc_symbols[k] = opts['symbols'][k]
end
end
end
opts = rspamd_config:get_all_opt('dkim')
if opts then
for k,_ in pairs(dkim_symbols) do
if opts[k] then
dkim_symbols[k] = opts[k]
end
end
end
opts = rspamd_config:get_all_opt('spf')
if opts then
for k,_ in pairs(spf_symbols) do
if opts[k] then
spf_symbols[k] = opts[k]
end
end
end
-- Disable DKIM checks if passed via HTTP headers
rspamd_config:add_condition("R_DKIM_ALLOW", function(task)
local hdr = task:get_request_header('DKIM')
if hdr then
local parser = ucl.parser()
local res, err = parser:parse_string(tostring(hdr))
if not res then
logger.infox(task, "cannot parse DKIM header: %1", err)
return true
end
local obj = parser:get_object()
if obj['result'] then
if obj['result'] == 'pass' or obj['result'] == 'allow' then
task:insert_result(dkim_symbols['symbol_allow'], 1.0, 'http header')
elseif obj['result'] == 'fail' or obj['result'] == 'reject' then
task:insert_result(dkim_symbols['symbol_deny'], 1.0, 'http header')
elseif obj['result'] == 'tempfail' or obj['result'] == 'softfail' then
task:insert_result(dkim_symbols['symbol_tempfail'], 1.0, 'http header')
elseif obj['result'] == 'permfail' then
task:insert_result(dkim_symbols['symbol_permfail'], 1.0, 'http header')
elseif obj['result'] == 'na' then
task:insert_result(dkim_symbols['symbol_na'], 1.0, 'http header')
end
return false
end
end
return true
end)
-- Disable DKIM checks if passed via HTTP headers
rspamd_config:add_condition("R_SPF_ALLOW", function(task)
local hdr = task:get_request_header('SPF')
if hdr then
local parser = ucl.parser()
local res, err = parser:parse_string(tostring(hdr))
if not res then
logger.infox(task, "cannot parse SPF header: %1", err)
return true
end
local obj = parser:get_object()
if obj['result'] then
if obj['result'] == 'pass' or obj['result'] == 'allow' then
task:insert_result(spf_symbols['symbol_allow'], 1.0, 'http header')
elseif obj['result'] == 'fail' or obj['result'] == 'reject' then
task:insert_result(spf_symbols['symbol_deny'], 1.0, 'http header')
elseif obj['result'] == 'neutral' then
task:insert_result(spf_symbols['symbol_neutral'], 1.0, 'http header')
elseif obj['result'] == 'softfail' then
task:insert_result(spf_symbols['symbol_softfail'], 1.0, 'http header')
elseif obj['result'] == 'permfail' then
task:insert_result(spf_symbols['symbol_permfail'], 1.0, 'http header')
elseif obj['result'] == 'na' then
task:insert_result(spf_symbols['symbol_na'], 1.0, 'http header')
end
return false
end
end
return true
end)
rspamd_config:add_condition("DMARC_POLICY_ALLOW", function(task)
local hdr = task:get_request_header('DMARC')
if hdr then
local parser = ucl.parser()
local res, err = parser:parse_string(tostring(hdr))
if not res then
logger.infox(task, "cannot parse DMARC header: %1", err)
return true
end
local obj = parser:get_object()
if obj['result'] then
if obj['result'] == 'pass' or obj['result'] == 'allow' then
task:insert_result(dmarc_symbols['allow'], 1.0, 'http header')
elseif obj['result'] == 'fail' or obj['result'] == 'reject' then
task:insert_result(dmarc_symbols['reject'], 1.0, 'http header')
elseif obj['result'] == 'quarantine' then
task:insert_result(dmarc_symbols['quarantine'], 1.0, 'http header')
elseif obj['result'] == 'tempfail' then
task:insert_result(dmarc_symbols['dnsfail'], 1.0, 'http header')
elseif obj['result'] == 'softfail' or obj['result'] == 'none' then
task:insert_result(dmarc_symbols['softfail'], 1.0, 'http header')
elseif obj['result'] == 'permfail' or obj['result'] == 'badpolicy' then
task:insert_result(dmarc_symbols['badpolicy'], 1.0, 'http header')
elseif obj['result'] == 'na' then
task:insert_result(dmarc_symbols['na'], 1.0, 'http header')
end
return false
end
end
return true
end)
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