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--[[
Copyright (c) 2017, 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 exports = {}
local lpeg = require 'lpeg'
local split_grammar = {}
local function rspamd_str_split(s, sep)
local gr = split_grammar[sep]
if not gr then
local _sep = lpeg.P(sep)
local elem = lpeg.C((1 - _sep)^0)
local p = lpeg.Ct(elem * (_sep * elem)^0)
gr = p
split_grammar[sep] = gr
end
return gr:match(s)
end
exports.rspamd_str_split = rspamd_str_split
local space = lpeg.S' \t\n\v\f\r'
local nospace = 1 - space
local ptrim = space^0 * lpeg.C((space^0 * nospace^1)^0)
local match = lpeg.match
exports.rspamd_str_trim = function(s)
return match(ptrim, s)
end
-- Robert Jay Gould http://lua-users.org/wiki/SimpleRound
exports.round = function(num, numDecimalPlaces)
local mult = 10^(numDecimalPlaces or 0)
return math.floor(num * mult) / mult
end
exports.template = function(tmpl, keys)
local var_lit = lpeg.P { lpeg.R("az") + lpeg.R("AZ") + lpeg.R("09") + "_" }
local var = lpeg.P { (lpeg.P("$") / "") * ((var_lit^1) / keys) }
local var_braced = lpeg.P { (lpeg.P("${") / "") * ((var_lit^1) / keys) * (lpeg.P("}") / "") }
local template_grammar = lpeg.Cs((var + var_braced + 1)^0)
return lpeg.match(template_grammar, tmpl)
end
exports.remove_email_aliases = function(email_addr)
local function check_gmail_user(addr)
-- Remove all points
local no_dots_user = string.gsub(addr.user, '%.', '')
local cap, pluses = string.match(no_dots_user, '^([^%+][^%+]*)(%+.*)$')
if cap then
return cap, rspamd_str_split(pluses, '+'), nil
elseif no_dots_user ~= addr.user then
return no_dots_user,{},nil
end
return nil
end
local function check_address(addr)
if addr.user then
local cap, pluses = string.match(addr.user, '^([^%+][^%+]*)(%+.*)$')
if cap then
return cap, rspamd_str_split(pluses, '+'), nil
end
end
return nil
end
local function set_addr(addr, new_user, new_domain)
if new_user then
addr.user = new_user
end
if new_domain then
addr.domain = new_domain
end
if addr.domain then
addr.addr = string.format('%s@%s', addr.user, addr.domain)
else
addr.addr = string.format('%s@', addr.user)
end
if addr.name and #addr.name > 0 then
addr.raw = string.format('"%s" <%s>', addr.name, addr.addr)
else
addr.raw = string.format('<%s>', addr.addr)
end
end
local function check_gmail(addr)
local nu, tags, nd = check_gmail_user(addr)
if nu then
return nu, tags, nd
end
return nil
end
local function check_googlemail(addr)
local nd = 'gmail.com'
local nu, tags = check_gmail_user(addr)
if nu then
return nu, tags, nd
end
return nil, nil, nd
end
local specific_domains = {
['gmail.com'] = check_gmail,
['googlemail.com'] = check_googlemail,
}
if email_addr then
if email_addr.domain and specific_domains[email_addr.domain] then
local nu, tags, nd = specific_domains[email_addr.domain](email_addr)
if nu or nd then
set_addr(email_addr, nu, nd)
return nu, tags
end
else
local nu, tags, nd = check_address(email_addr)
if nu or nd then
set_addr(email_addr, nu, nd)
return nu, tags
end
end
return nil
end
end
exports.is_rspamc_or_controller = function(task)
local ua = task:get_request_header('User-Agent') or ''
local pwd = task:get_request_header('Password')
local is_rspamc = false
if tostring(ua) == 'rspamc' or pwd then is_rspamc = true end
return is_rspamc
end
local unpack_function = table.unpack or unpack
exports.unpack = function(t)
return unpack_function(t)
end
return exports
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