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
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
|
%% ``The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved via the world wide web at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% The Initial Developer of the Original Code is Ericsson Utvecklings AB.
%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
%% AB. All Rights Reserved.''
%%
%% $Id$
%%
-module(mod_security).
%% Security Audit Functionality
%% User API exports
-export([list_blocked_users/1, list_blocked_users/2, list_blocked_users/3,
block_user/4, block_user/5,
unblock_user/2, unblock_user/3, unblock_user/4,
list_auth_users/1, list_auth_users/2, list_auth_users/3]).
%% module API exports
-export([do/1, load/2, store/2, remove/1]).
-include("httpd.hrl").
%% We will not make the change to use base64 in stdlib in inets just yet.
%% it will be included in the next major release of inets.
-compile({nowarn_deprecated_function, {http_base_64, encode, 1}}).
-define(VMODULE,"SEC").
%% do/1
do(Info) ->
%% Check and see if any user has been authorized.
case httpd_util:key1search(Info#mod.data,remote_user,not_defined_user) of
not_defined_user ->
%% No user has been authorized.
case httpd_util:key1search(Info#mod.data, response) of
%% A status code has been generated!
{401, _Response} ->
case httpd_util:key1search(Info#mod.parsed_header,
"authorization") of
undefined ->
%% Not an authorization attempt (server just replied to
%% challenge for authentication)
{proceed, Info#mod.data};
[$B,$a,$s,$i,$c,$ |EncodedString] ->
%% Someone tried to authenticate, and obviously failed!
DecodedString =
case (catch
http_base_64:decode(
EncodedString)) of
%% Decode failed
{'EXIT',{function_clause, _}} ->
EncodedString;
String ->
String
end,
report_failed(Info, DecodedString,"Failed authentication"),
take_failed_action(Info, DecodedString),
{proceed, Info#mod.data}
end;
_ ->
{proceed, Info#mod.data}
end;
User ->
%% A user has been authenticated, now is he blocked ?
Path = mod_alias:path(Info#mod.data,
Info#mod.config_db,
Info#mod.request_uri),
{_Dir, SDirData} = secretp(Path, Info#mod.config_db),
Addr = httpd_util:lookup(Info#mod.config_db, bind_address),
Port = httpd_util:lookup(Info#mod.config_db, port),
case mod_security_server:check_blocked_user(Info, User,
SDirData,
Addr, Port) of
true ->
report_failed(Info, User ,"User Blocked"),
{proceed, [{status, {403, Info#mod.request_uri, ""}}|Info#mod.data]};
false ->
report_failed(Info, User,"Authentication Succedded"),
mod_security_server:store_successful_auth(Addr, Port,
User, SDirData),
{proceed, Info#mod.data}
end
end.
report_failed(Info, Auth, Event) ->
Request = Info#mod.request_line,
{_PortNumber,RemoteHost}=(Info#mod.init_data)#init_data.peername,
String = RemoteHost ++ " : " ++ Event ++ " : " ++ Request ++ " : " ++ Auth,
mod_disk_log:security_log(Info,String),
mod_log:security_log(Info, String).
take_failed_action(Info, Auth) ->
Path = mod_alias:path(Info#mod.data, Info#mod.config_db,
Info#mod.request_uri),
{_Dir, SDirData} = secretp(Path, Info#mod.config_db),
Addr = httpd_util:lookup(Info#mod.config_db, bind_address),
Port = httpd_util:lookup(Info#mod.config_db, port),
mod_security_server:store_failed_auth(Info, Addr, Port,
Auth, SDirData).
secretp(Path, ConfigDB) ->
Directories = ets:match(ConfigDB,{directory,'$1','_'}),
case secret_path(Path, Directories) of
{yes, Directory} ->
SDirs0 = httpd_util:multi_lookup(ConfigDB, security_directory),
SDir = lists:filter(fun(X) ->
lists:member({path, Directory}, X)
end, SDirs0),
{Directory, lists:flatten(SDir)};
no ->
{[], []}
end.
secret_path(Path,Directories) ->
secret_path(Path, httpd_util:uniq(lists:sort(Directories)), to_be_found).
secret_path(_Path, [], to_be_found) ->
no;
secret_path(_Path, [], Directory) ->
{yes, Directory};
secret_path(Path, [[NewDirectory]|Rest], Directory) ->
case regexp:match(Path, NewDirectory) of
{match, _, _} when Directory == to_be_found ->
secret_path(Path, Rest, NewDirectory);
{match, _, Length} when Length > length(Directory)->
secret_path(Path, Rest, NewDirectory);
{match, _, _} ->
secret_path(Path, Rest, Directory);
nomatch ->
secret_path(Path, Rest, Directory)
end.
load("<Directory " ++ Directory,[]) ->
Dir = httpd_conf:custom_clean(Directory,"",">"),
{ok, [{security_directory, Dir, [{path, Dir}]}]};
load(eof,[{security_directory,Directory, _DirData}|_]) ->
{error, ?NICE("Premature end-of-file in "++Directory)};
load("SecurityDataFile " ++ FileName,
[{security_directory, Dir, DirData}]) ->
File = httpd_conf:clean(FileName),
{ok, [{security_directory, Dir, [{data_file, File}|DirData]}]};
load("SecurityCallbackModule " ++ ModuleName,
[{security_directory, Dir, DirData}]) ->
Mod = list_to_atom(httpd_conf:clean(ModuleName)),
{ok, [{security_directory, Dir, [{callback_module, Mod}|DirData]}]};
load("SecurityMaxRetries " ++ Retries,
[{security_directory, Dir, DirData}]) ->
load_return_int_tag("SecurityMaxRetries", max_retries,
httpd_conf:clean(Retries), Dir, DirData);
load("SecurityBlockTime " ++ Time,
[{security_directory, Dir, DirData}]) ->
load_return_int_tag("SecurityBlockTime", block_time,
httpd_conf:clean(Time), Dir, DirData);
load("SecurityFailExpireTime " ++ Time,
[{security_directory, Dir, DirData}]) ->
load_return_int_tag("SecurityFailExpireTime", fail_expire_time,
httpd_conf:clean(Time), Dir, DirData);
load("SecurityAuthTimeout " ++ Time0,
[{security_directory, Dir, DirData}]) ->
Time = httpd_conf:clean(Time0),
load_return_int_tag("SecurityAuthTimeout", auth_timeout,
httpd_conf:clean(Time), Dir, DirData);
load("AuthName " ++ Name0,
[{security_directory, Dir, DirData}]) ->
Name = httpd_conf:clean(Name0),
{ok, [{security_directory, Dir, [{auth_name, Name}|DirData]}]};
load("</Directory>",[{security_directory,Directory, DirData}]) ->
{ok, [], {security_directory, Directory, DirData}}.
load_return_int_tag(Name, Atom, Time, Dir, DirData) ->
case Time of
"infinity" ->
{ok, [{security_directory, Dir, [{Atom, 99999999999999999999999999999}|DirData]}]};
_Int ->
case catch list_to_integer(Time) of
{'EXIT', _} ->
{error, Time++" is an invalid "++Name};
Val ->
{ok, [{security_directory, Dir, [{Atom, Val}|DirData]}]}
end
end.
store({security_directory, _Dir0, DirData}, ConfigList) ->
Addr = httpd_util:key1search(ConfigList, bind_address),
Port = httpd_util:key1search(ConfigList, port),
mod_security_server:start(Addr, Port),
SR = httpd_util:key1search(ConfigList, server_root),
case httpd_util:key1search(DirData, data_file, no_data_file) of
no_data_file ->
{error, no_security_data_file};
DataFile0 ->
DataFile =
case filename:pathtype(DataFile0) of
relative ->
filename:join(SR, DataFile0);
_ ->
DataFile0
end,
case mod_security_server:new_table(Addr, Port, DataFile) of
{ok, TwoTables} ->
NewDirData0 = lists:keyreplace(data_file, 1, DirData,
{data_file, TwoTables}),
NewDirData1 = case Addr of
undefined ->
[{port,Port}|NewDirData0];
_ ->
[{port,Port},{bind_address,Addr}|
NewDirData0]
end,
{ok, {security_directory,NewDirData1}};
{error, Err} ->
{error, {{open_data_file, DataFile}, Err}}
end
end.
remove(ConfigDB) ->
Addr = case ets:lookup(ConfigDB, bind_address) of
[] ->
undefined;
[{bind_address, Address}] ->
Address
end,
[{port, Port}] = ets:lookup(ConfigDB, port),
mod_security_server:delete_tables(Addr, Port),
mod_security_server:stop(Addr, Port).
%%
%% User API
%%
%% list_blocked_users
list_blocked_users(Port) ->
list_blocked_users(undefined, Port).
list_blocked_users(Port, Dir) when integer(Port) ->
list_blocked_users(undefined,Port,Dir);
list_blocked_users(Addr, Port) when integer(Port) ->
mod_security_server:list_blocked_users(Addr, Port).
list_blocked_users(Addr, Port, Dir) ->
mod_security_server:list_blocked_users(Addr, Port, Dir).
%% block_user
block_user(User, Port, Dir, Time) ->
block_user(User, undefined, Port, Dir, Time).
block_user(User, Addr, Port, Dir, Time) ->
mod_security_server:block_user(User, Addr, Port, Dir, Time).
%% unblock_user
unblock_user(User, Port) ->
unblock_user(User, undefined, Port).
unblock_user(User, Port, Dir) when integer(Port) ->
unblock_user(User, undefined, Port, Dir);
unblock_user(User, Addr, Port) when integer(Port) ->
mod_security_server:unblock_user(User, Addr, Port).
unblock_user(User, Addr, Port, Dir) ->
mod_security_server:unblock_user(User, Addr, Port, Dir).
%% list_auth_users
list_auth_users(Port) ->
list_auth_users(undefined,Port).
list_auth_users(Port, Dir) when integer(Port) ->
list_auth_users(undefined, Port, Dir);
list_auth_users(Addr, Port) when integer(Port) ->
mod_security_server:list_auth_users(Addr, Port).
list_auth_users(Addr, Port, Dir) ->
mod_security_server:list_auth_users(Addr, Port, Dir).
|