Line data Source code
1 : /*
2 : START OF LICENSE STUB
3 : DeDOS: Declarative Dispersion-Oriented Software
4 : Copyright (C) 2017 University of Pennsylvania, Georgetown University
5 :
6 : This program is free software: you can redistribute it and/or modify
7 : it under the terms of the GNU General Public License as published by
8 : the Free Software Foundation, either version 3 of the License, or
9 : (at your option) any later version.
10 :
11 : This program is distributed in the hope that it will be useful,
12 : but WITHOUT ANY WARRANTY; without even the implied warranty of
13 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 : GNU General Public License for more details.
15 :
16 : You should have received a copy of the GNU General Public License
17 : along with this program. If not, see <http://www.gnu.org/licenses/>.
18 : END OF LICENSE STUB
19 : */
20 : #include <string.h>
21 : #include <stdio.h>
22 : #include <pcre.h>
23 :
24 : #define EVIL_REGEX "^(a+)+$"
25 : #define HTML "\
26 : <!DOCTYPE html>\n\
27 : <html>\n\
28 : <body>\n\
29 : <h1>Does %s match %s?</h1> <br/>\n\
30 : <p>%s.</p>\n\
31 : </body>\n\
32 : </html>\
33 : "
34 :
35 0 : int html_len(){
36 0 : return strlen(HTML) + 200;
37 : }
38 :
39 2 : int regex_html(char *to_match, char *htmlDoc){
40 : const char *pcreErrorStr;
41 : int errOffset;
42 2 : pcre *reCompiled = pcre_compile(EVIL_REGEX, 0, &pcreErrorStr, &errOffset, NULL);
43 :
44 : pcre_extra pcreExtra;
45 2 : pcreExtra.match_limit = -1;
46 2 : pcreExtra.match_limit_recursion = -1;
47 2 : pcreExtra.flags = PCRE_EXTRA_MATCH_LIMIT | PCRE_EXTRA_MATCH_LIMIT_RECURSION;
48 :
49 2 : int len = strlen(to_match);
50 : int x[1];
51 :
52 2 : int ret = pcre_exec(reCompiled, &pcreExtra, to_match, len, 0, 0, x, 1);
53 :
54 : char resp[5];
55 2 : if (ret < 0){
56 2 : sprintf(resp, "%s", "NO");
57 : } else {
58 0 : sprintf(resp, "%s", "YES");
59 : }
60 2 : sprintf(htmlDoc, HTML, to_match, EVIL_REGEX, resp);
61 2 : pcre_free(reCompiled);
62 2 : return 0;
63 : }
64 :
65 :
|
