1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
--[[
Copyright (c) 2015, Vsevolod Stakhov <vsevolod@highsecure.ru>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
]]--
-- This plugin is intended to read and parse spamassassin rules with regexp
-- rules. SA plugins or statistics are not supported
local rspamd_logger = require "rspamd_logger"
local rspamd_regexp = require "rspamd_regexp"
local _ = require "fun"
--local dumper = require 'pl.pretty'.dump
local rules = {}
local section = rspamd_config:get_key("spamassassin")
local function split(str)
local result = {}
for token in string.gmatch(str, "[^%s]+") do
table.insert(result, token)
end
return result
end
local function process_sa_conf(f)
local cur_rule = {}
local valid_rule = false
local function insert_cur_rule()
-- We have previous rule valid
rules[cur_rule['symbol']] = cur_rule
cur_rule = {}
valid_rule = false
end
local function words_to_re(words, start)
return table.concat(_.totable(_.drop_n(start, words)), " ");
end
for l in f:lines() do
(function ()
if string.len(l) == 0 or
_.nth(1, _.drop_while(function(c) return c == ' ' end, _.iter(l))) == '#' then
return
end
local slash = string.find(l, '/')
words = _.totable(_.filter(function(w) return w ~= "" end, _.iter(split(l))))
if words[1] == "header" and slash then
-- header SYMBOL Header ~= /regexp/
if valid_rule then
insert_cur_rule()
end
cur_rule['type'] = 'header'
cur_rule['symbol'] = words[2]
cur_rule['header'] = words[3]
cur_rule['re_expr'] = words_to_re(words, 4)
cur_rule['re'] = rspamd_regexp.create_cached(cur_rule['re_expr'])
if cur_rule['re'] then valid_rule = true end
elseif words[1] == "body" and slash then
-- body SYMBOL /regexp/
if valid_rule then
insert_cur_rule()
end
cur_rule['type'] = 'part'
cur_rule['symbol'] = words[2]
cur_rule['re_expr'] = words_to_re(words, 2)
cur_rule['re'] = rspamd_regexp.create_cached(cur_rule['re_expr'])
if cur_rule['re'] then valid_rule = true end
elseif words[1] == "rawbody" and slash then
-- body SYMBOL /regexp/
if valid_rule then
insert_cur_rule()
end
cur_rule['type'] = 'message'
cur_rule['symbol'] = words[2]
cur_rule['re_expr'] = words_to_re(words, 2)
cur_rule['re'] = rspamd_regexp.create_cached(cur_rule['re_expr'])
if cur_rule['re'] then valid_rule = true end
elseif words[1] == "meta" then
-- meta SYMBOL expression
if valid_rule then
insert_cur_rule()
end
cur_rule['type'] = 'meta'
cur_rule['symbol'] = words[2]
cur_rule['meta'] = words_to_re(words, 2)
if cur_rule['meta'] then valid_rule = true end
elseif words[1] == "describe" and valid_rule then
cur_rule['description'] = words_to_re(words, 1)
elseif words[1] == "score" and valid_rule then
cur_rule['score'] = tonumber(words_to_re(words, 1)[1])
end
end)()
end
if valid_rule then
insert_cur_rule()
end
end
if type(section) == "table" then
for _,fn in pairs(section) do
f = io.open(fn, "r")
if f then
process_sa_conf(f)
end
end
end
-- Now check all valid rules and add the according rspamd rules
-- Meta rules
_.each(function(k, r)
rspamd_config:add_composite(k, r['meta'])
if r['score'] then
rspamd_config:set_metric_symbol(k, r['score'], r['description'])
end
end,
_.filter(function(k, r)
return r['type'] == 'meta'
end,
rules))
-- Header rules
_.each(function(k, r)
local f = function(task)
local hdr = task:get_header_full(r['header'])
if hdr then
for n, rh in ipairs(hdr) do
-- Subject for optimization
if (r['re']:match(rh['decoded'])) then
task:insert_result(k, 1.0)
end
end
end
end
rspamd_config:register_symbol(k, 1.0, f)
if r['score'] then
rspamd_config:set_metric_symbol(k, r['score'], r['description'])
end
end,
_.filter(function(k, r)
return r['type'] == 'header' and r['header']
end,
rules))
|
