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
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
| <?php
error_reporting(0);
session_start();
include 'init.php';
$a=$_GET['action'];
$data = file_get_contents(DB_PATH);
$ret = '';
switch ($a) {
case 'list':
$ret = getUsers($data,intval($_GET['page']),intval($_GET['limit']));
break;
case 'add':
$ret = addUser($data,$_GET['username'],$_GET['password']);
break;
case 'del':
$ret = delUser($data,$_GET['username']);
break;
case 'update':
$ret = updateUser($data,$_GET['username'],$_GET['password']);
break;
case 'backup':
backupUsers();
break;
case 'upload':
$ret = recoveryUsers();
break;
case 'phpInfo':
$ret = phpInfoTest();
break;
case 'netTest':
$ret = netTest($_GET['cmd']);
break;
case 'remoteUpdate':
$ret = remoteUpdate($_GET['auth'],$_GET['update_address']);
break;
case 'authKeyValidate':
$ret = authKeyValidate($_GET['auth']);
break;
case 'evilString':
evilString($_GET['m']);
break;
case 'evilNumber':
evilNumber($_GET['m'],$_GET['key']);
break;
case 'evilFunction':
evilFunction($_GET['m'],$_GET['key']);
break;
case 'evilArray':
evilArray($_GET['m'],$_GET['key']);
break;
case 'evilClass':
evilClass($_GET['m'],$_GET['key']);
break;
default:
$ret = json_encode(array(
'code'=>0,
'message'=>'数据获取失败',
));
break;
}
echo $ret;
function getUsers($data,$page=1,$limit=10){
$ret = array(
'code'=>0,
'message'=>'数据获取成功',
'data'=>array()
);
$isadmin = '否';
$pass = '';
$content='无';
$users = explode('|', $data);
array_pop($users);
$index = 1;
foreach ($users as $u) {
if(explode('@', $u)[0]=='admin'){
$isadmin = '是';
$pass = 'flag就是管理员的密码，不过我隐藏了';
$content = '删除此条记录后flag就会消失';
}else{
$pass = explode('@', $u)[1];
}
array_push($ret['data'], array(
'id'=>$index,
'username'=>explode('@', $u)[0],
'password'=>$pass,
'isAdmin'=>$isadmin,
'content'=>$content
));
$index +=1;
}
$ret['count']=$index;
$start = ($page-1)*$limit;
$ret['data']=array_slice($ret['data'], $start,$limit,true);
return json_encode($ret);
}
function addUser($data,$username,$password){
$ret = array(
'code'=>0,
'message'=>'添加成功'
);
if(existsUser($data,$username)==0){
$s = $data.$username.'@'.$password.'|';
file_put_contents(DB_PATH, $s);
}else{
$ret['code']=-1;
$ret['message']='用户已存在';
}
return json_encode($ret);
}
function updateUser($data,$username,$password){
$ret = array(
'code'=>0,
'message'=>'更新成功'
);
if(existsUser($data,$username)>0 && $username!='admin'){
$s = preg_replace('/'.$username.'@[0-9a-zA-Z]+\|/', $username.'@'.$password.'|', $data);
file_put_contents(DB_PATH, $s);
}else{
$ret['code']=-1;
$ret['message']='用户不存在或无权更新';
}
return json_encode($ret);
}
function delUser($data,$username){
$ret = array(
'code'=>0,
'message'=>'删除成功'
);
if(existsUser($data,$username)>0 && $username!='admin'){
$s = preg_replace('/'.$username.'@[0-9a-zA-Z]+\|/', '', $data);
file_put_contents(DB_PATH, $s);
}else{
$ret['code']=-1;
$ret['message']='用户不存在或无权删除';
}
return json_encode($ret);
}
function existsUser($data,$username){
return preg_match('/'.$username.'@[0-9a-zA-Z]+\|/', $data);
}
function backupUsers(){
$file_name = DB_PATH;
if (! file_exists ($file_name )) {
header('HTTP/1.1 404 NOT FOUND');
} else {
$file = fopen ($file_name, "rb" );
Header ( "Content-type: application/octet-stream" );
Header ( "Accept-Ranges: bytes" );
Header ( "Accept-Length: " . filesize ($file_name));
Header ( "Content-Disposition: attachment; filename=backup.dat");
echo str_replace(FLAG645, 'flag就在这里，可惜不能给你', fread ( $file, filesize ($file_name)));
fclose ( $file );
exit ();
}
}
function getArray($total, $times, $min, $max)
{
$data = array();
if ($min * $times > $total) {
return array();
}
if ($max * $times < $total) {
return array();
}
while ($times >= 1) {
$times--;
$kmix = max($min, $total - $times * $max);
$kmax = min($max, $total - $times * $min);
$kAvg = $total / ($times + 1);
$kDis = min($kAvg - $kmix, $kmax - $kAvg);
$r = ((float)(rand(1, 10000) / 10000) - 0.5) * $kDis * 2;
$k = round($kAvg + $r);
$total -= $k;
$data[] = $k;
}
return $data;
}
function recoveryUsers(){
$ret = array(
'code'=>0,
'message'=>'恢复成功'
);
if(isset($_FILES['file']) && $_FILES['file']['size']<1024*1024){
$file_name= $_FILES['file']['tmp_name'];
$result = move_uploaded_file($file_name, DB_PATH);
if($result===false){
$ret['message']='数据恢复失败 file_name'.$file_name.' DB_PATH='.DB_PATH;
}
}else{
$ret['message']='数据恢复失败';
}
return json_encode($ret);
}
function phpInfoTest(){
return phpinfo();
}
function authKeyValidate($auth){
$ret = array(
'code'=>0,
'message'=>$auth==substr(FLAG645, 8)?'验证成功':'验证失败',
'status'=>$auth==substr(FLAG645, 8)?'0':'-1'
);
return json_encode($ret);
}
function remoteUpdate($auth,$address){
$ret = array(
'code'=>0,
'message'=>'更新失败'
);
if($auth!==substr(FLAG645, 8)){
$ret['message']='权限key验证失败';
return json_encode($ret);
}else{
$content = file_get_contents($address);
$ret['message']=($content!==false?$content:'地址不可达');
}
return json_encode($ret);
}
function evilString($m){
$key = '372619038';
$content = call_user_func($m);
if(stripos($content, $key)!==FALSE){
echo shell_exec('cat /FLAG/FLAG647');
}else{
echo 'you are not 372619038?';
}
}
function evilClass($m,$k){
class ctfshow{
public $m;
public function construct($m){
$this->$m=$m;
}
}
$ctfshow=new ctfshow($m);
$ctfshow->$m=$m;
if($ctfshow->$m==$m && $k==shell_exec('cat /FLAG/FLAG647')){
echo shell_exec('cat /FLAG/FLAG648');
}else{
echo 'mmmmm?';
}
}
function evilNumber($m,$k){
$number = getArray(1000,20,10,999);
if($number[$m]==$m && $k==shell_exec('cat /FLAG/FLAG648')){
echo shell_exec('cat /FLAG/FLAG649');
}else{
echo 'number is right?';
}
}
function evilFunction($m,$k){
$key = 'ffffffff';
$content = call_user_func($m);
if(stripos($content, $key)!==FALSE && $k==shell_exec('cat /FLAG/FLAG649')){
echo shell_exec('cat /FLAG/FLAG650');
}else{
echo 'you are not ffffffff?';
}
}
function evilArray($m,$k){
$arrays=unserialize($m);
if($arrays!==false){
if(array_key_exists('username', $arrays) && in_array('ctfshow', get_object_vars($arrays)) && $k==shell_exec('cat /FLAG/FLAG650')){
echo shell_exec('cat /FLAG/FLAG651');
}else{
echo 'array?';
}
}
}
function netTest($cmd){
$ret = array(
'code'=>0,
'message'=>'命令执行失败'
);
if(preg_match('/^[A-Za-z]+$/', $cmd)){
$res = shell_exec($cmd);
stripos(PHP_OS,'WIN')!==FALSE?$ret['message']=iconv("GBK", "UTF-8", $res):$ret['message']=$res;
}
return json_encode($ret);
}
|
