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coova-chilli

    1: /* 
    2:  *
    3:  * Copyright (C) 2003, 2004, 2005 Mondru AB.
    4:  * Copyright (c) 2006-2007 David Bird <david@coova.com>
    5:  *
    6:  * The contents of this file may be used under the terms of the GNU
    7:  * General Public License Version 2, provided that the above copyright
    8:  * notice and this permission notice is included in all copies or
    9:  * substantial portions of the software.
   10:  * 
   11:  */
   12: 
   13: #include "system.h"
   14: #include "md5.h"
   15: #define MD5LEN 16
   16: 
   17: static int usage(char *program) {
   18:   fprintf(stderr, "Usage: %s <challenge> <uamsecret> <password>\n", program);
   19:   return 1;
   20: }
   21: 
   22: static int hextochar(char *src, unsigned char * dst) {
   23:   char x[3];
   24:   int n;
   25:   int y;
   26: 
   27:   for (n=0; n < MD5LEN; n++) {
   28:     x[0] = src[n*2+0];
   29:     x[1] = src[n*2+1];
   30:     x[2] = 0;
   31: 
   32:     if (sscanf(x, "%2x", &y) != 1)
   33:       return -1;
   34: 
   35:     dst[n] = (unsigned char) y;
   36:   }
   37: 
   38:   return 0;
   39: }
   40: 
   41: static int chartohex(unsigned char *src, char *dst) {
   42:   char x[3];
   43:   int n;
   44:   
   45:   for (n=0; n < MD5LEN; n++) {
   46:     snprintf(x, 3, "%.2x", src[n]);
   47:     dst[n*2+0] = x[0];
   48:     dst[n*2+1] = x[1];
   49:   }
   50:   dst[MD5LEN*2] = 0;
   51:   return 0;
   52: }
   53: 
   54: int main(int argc, char **argv) {
   55:   unsigned char chap_ident = 0;
   56:   unsigned char challenge[MD5LEN];
   57:   unsigned char response[MD5LEN];
   58:   char buffer[MD5LEN*3];
   59:   MD5_CTX context;
   60: 
   61:   if (argc != 4 && argc != 5) 
   62:     return usage(argv[0]);
   63: 
   64:   if (argc == 5) 
   65:     chap_ident = atoi(argv[4]);
   66: 
   67:   /* challeng - argv 1 */
   68:   memset(buffer, 0, sizeof(buffer));
   69:   /*fprintf(stderr,"challenge: %s\n",argv[1]);*/
   70:   strcpy(buffer, argv[1]);
   71:   hextochar(buffer, challenge);
   72: 
   73:   MD5Init(&context);
   74:   MD5Update(&context, challenge, MD5LEN);
   75:   /* uamsecret - argv 2 */
   76:   /*fprintf(stderr,"uamsecret: %s\n",argv[2]);*/
   77:   MD5Update(&context, (uint8_t*)argv[2], strlen(argv[2]));
   78:   MD5Final(challenge, &context);
   79: 
   80:   MD5Init(&context);
   81:   MD5Update(&context, (uint8_t*)&chap_ident, 1);	  
   82:   /* password - argv 3 */
   83:   /*fprintf(stderr,"password: %s\n",argv[3]);*/
   84:   MD5Update(&context, (uint8_t*)argv[3], strlen(argv[3]));
   85:   MD5Update(&context, challenge, MD5LEN);
   86:   MD5Final(response, &context);
   87: 
   88:   chartohex(response, buffer);
   89:   printf("%s\n", buffer);
   90:   return 0;
   91: }