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
169
170
171
172
|
--[[
Copyright (c) 2017, Andrew Lewis <nerf@judo.za.org>
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.
]]--
-- A plugin that forces actions
if confighelp then
return
end
local E = {}
local N = 'force_actions'
local fun = require "fun"
local lua_util = require "lua_util"
local rspamd_cryptobox_hash = require "rspamd_cryptobox_hash"
local rspamd_expression = require "rspamd_expression"
local rspamd_logger = require "rspamd_logger"
local function gen_cb(expr, act, pool, message, subject, raction, honor, limit)
local function parse_atom(str)
local atom = table.concat(fun.totable(fun.take_while(function(c)
if string.find(', \t()><+!|&\n', c) then
return false
end
return true
end, fun.iter(str))), '')
return atom
end
local function process_atom(atom, task)
local f_ret = task:has_symbol(atom)
if f_ret then
f_ret = math.abs(task:get_symbol(atom)[1].score)
if f_ret < 0.001 then
-- Adjust some low score to distinguish from pure zero
f_ret = 0.001
end
return f_ret
end
return 0
end
local e, err = rspamd_expression.create(expr, {parse_atom, process_atom}, pool)
if err then
rspamd_logger.errx(rspamd_config, 'Couldnt create expression [%1]: %2', expr, err)
return
end
return function(task)
local cact = task:get_metric_action('default')
if cact == act then
return false
end
if honor and honor[cact] then
return false
elseif raction and not raction[cact] then
return false
end
local ret = e:process(task)
if ret > limit then
if subject then
task:set_metric_subject(subject)
end
if type(message) == 'string' then
task:set_pre_result(act, message, N)
else
task:set_pre_result(act, nil, N)
end
return true, act
end
end, e:atoms()
end
local function configure_module()
local opts = rspamd_config:get_all_opt(N)
if not opts then
return false
end
if type(opts.actions) == 'table' then
rspamd_logger.warnx(rspamd_config, 'Processing legacy config')
for action, expressions in pairs(opts.actions) do
if type(expressions) == 'table' then
for _, expr in ipairs(expressions) do
local message, subject
if type(expr) == 'table' then
subject = expr[3]
message = expr[2]
expr = expr[1]
else
message = (opts.messages or E)[expr]
end
if type(expr) == 'string' then
local cb, atoms = gen_cb(expr, action, rspamd_config:get_mempool(), message, subject)
if cb and atoms then
local h = rspamd_cryptobox_hash.create()
h:update(expr)
local name = 'FORCE_ACTION_' .. string.upper(string.sub(h:hex(), 1, 12))
rspamd_config:register_symbol({
type = 'normal',
name = name,
callback = cb,
flags = 'empty',
})
for _, a in ipairs(atoms) do
rspamd_config:register_dependency(name, a)
end
rspamd_logger.infox(rspamd_config, 'Registered symbol %1 <%2> with dependencies [%3]',
name, expr, table.concat(atoms, ','))
end
end
end
end
end
elseif type(opts.rules) == 'table' then
for name, sett in pairs(opts.rules) do
local action = sett.action
local expr = sett.expression
if action and expr then
local subject = sett.subject
local message = sett.message
local lim = sett.limit or 0
local raction = lua_util.list_to_hash(sett.require_action)
local honor = lua_util.list_to_hash(sett.honor_action)
local cb, atoms = gen_cb(expr, action, rspamd_config:get_mempool(),
message, subject, raction, honor, lim)
if cb and atoms then
local t = {}
if (raction or honor) then
t.type = 'postfilter'
t.priority = 10
else
t.type = 'normal'
end
t.name = 'FORCE_ACTION_' .. name
t.callback = cb
t.flags = 'empty'
rspamd_config:register_symbol(t)
if t.type == 'normal' then
for _, a in ipairs(atoms) do
rspamd_config:register_dependency(t.name, a)
end
rspamd_logger.infox(rspamd_config, 'Registered symbol %1 <%2> with dependencies [%3]',
name, expr, table.concat(atoms, ','))
else
rspamd_logger.infox(rspamd_config, 'Registered symbol %1 <%2> as postfilter', name, expr)
end
end
end
end
end
end
configure_module()
|
