DeDOS/docs/regex_8c_source.html

 /*

 START OF LICENSE STUB

     DeDOS: Declarative Dispersion-Oriented Software

     Copyright (C) 2017 University of Pennsylvania, Georgetown University


     This program is free software: you can redistribute it and/or modify

     it under the terms of the GNU General Public License as published by

     the Free Software Foundation, either version 3 of the License, or

     (at your option) any later version.


     This program is distributed in the hope that it will be useful,

     but WITHOUT ANY WARRANTY; without even the implied warranty of

     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

     GNU General Public License for more details.


     You should have received a copy of the GNU General Public License

     along with this program.  If not, see <http://www.gnu.org/licenses/>.

 END OF LICENSE STUB

 */

 #include <string.h>

 #include <stdio.h>

 #include <pcre.h>


 #define EVIL_REGEX "^(a+)+$"

 #define HTML "\

 <!DOCTYPE html>\n\

 <html>\n\

     <body>\n\

         <h1>Does %s match %s?</h1> <br/>\n\

         <p>%s.</p>\n\

     </body>\n\

 </html>\

 "


 int html_len(){

     return strlen(HTML) + 200;

 }


 int regex_html(char *to_match, char *htmlDoc){

     const char *pcreErrorStr;

     int errOffset;

     pcre *reCompiled = pcre_compile(EVIL_REGEX, 0, &pcreErrorStr, &errOffset, NULL);


     pcre_extra pcreExtra;

     pcreExtra.match_limit = -1;

     pcreExtra.match_limit_recursion = -1;

     pcreExtra.flags = PCRE_EXTRA_MATCH_LIMIT | PCRE_EXTRA_MATCH_LIMIT_RECURSION;


     int len = strlen(to_match);

     int x[1];


     int ret = pcre_exec(reCompiled, &pcreExtra, to_match, len, 0, 0, x, 1);


     char resp[5];

     if (ret < 0){

         sprintf(resp, "%s", "NO");

     } else {

         sprintf(resp, "%s", "YES");

     }

     sprintf(htmlDoc, HTML, to_match, EVIL_REGEX, resp);

     pcre_free(reCompiled);

     return 0;

 }


regex_html
int regex_html(char *to_match, char *htmlDoc)

HTML
#define HTML
Definition: regex.c:25

EVIL_REGEX
#define EVIL_REGEX
Definition: regex.c:24

html_len
int html_len()
Definition: regex.c:35